(function (root, factory) {if (typeof define === 'function' && define.amd) {define(factory);} else {root.emmet = factory();}}(this, function () {
/**
 * almond 0.2.6 Copyright (c) 2011-2012, The Dojo Foundation All Rights Reserved.
 * Available via the MIT or new BSD license.
 * see: http://github.com/jrburke/almond for details
 */
//Going sloppy to avoid 'use strict' string cost, but strict practices should
//be followed.
/*jslint sloppy: true */
/*global setTimeout: false */

var requirejs, require, define;
(function (undef) {
    var main, req, makeMap, handlers,
        defined = {},
        waiting = {},
        config = {},
        defining = {},
        hasOwn = Object.prototype.hasOwnProperty,
        aps = [].slice;

    function hasProp(obj, prop) {
        return hasOwn.call(obj, prop);
    }

    /**
     * Given a relative module name, like ./something, normalize it to
     * a real name that can be mapped to a path.
     * @param {String} name the relative name
     * @param {String} baseName a real name that the name arg is relative
     * to.
     * @returns {String} normalized name
     */
    function normalize(name, baseName) {
        var nameParts, nameSegment, mapValue, foundMap,
            foundI, foundStarMap, starI, i, j, part,
            baseParts = baseName && baseName.split("/"),
            map = config.map,
            starMap = (map && map['*']) || {};

        //Adjust any relative paths.
        if (name && name.charAt(0) === ".") {
            //If have a base name, try to normalize against it,
            //otherwise, assume it is a top-level require that will
            //be relative to baseUrl in the end.
            if (baseName) {
                //Convert baseName to array, and lop off the last part,
                //so that . matches that "directory" and not name of the baseName's
                //module. For instance, baseName of "one/two/three", maps to
                //"one/two/three.js", but we want the directory, "one/two" for
                //this normalization.
                baseParts = baseParts.slice(0, baseParts.length - 1);

                name = baseParts.concat(name.split("/"));

                //start trimDots
                for (i = 0; i < name.length; i += 1) {
                    part = name[i];
                    if (part === ".") {
                        name.splice(i, 1);
                        i -= 1;
                    } else if (part === "..") {
                        if (i === 1 && (name[2] === '..' || name[0] === '..')) {
                            //End of the line. Keep at least one non-dot
                            //path segment at the front so it can be mapped
                            //correctly to disk. Otherwise, there is likely
                            //no path mapping for a path starting with '..'.
                            //This can still fail, but catches the most reasonable
                            //uses of ..
                            break;
                        } else if (i > 0) {
                            name.splice(i - 1, 2);
                            i -= 2;
                        }
                    }
                }
                //end trimDots

                name = name.join("/");
            } else if (name.indexOf('./') === 0) {
                // No baseName, so this is ID is resolved relative
                // to baseUrl, pull off the leading dot.
                name = name.substring(2);
            }
        }

        //Apply map config if available.
        if ((baseParts || starMap) && map) {
            nameParts = name.split('/');

            for (i = nameParts.length; i > 0; i -= 1) {
                nameSegment = nameParts.slice(0, i).join("/");

                if (baseParts) {
                    //Find the longest baseName segment match in the config.
                    //So, do joins on the biggest to smallest lengths of baseParts.
                    for (j = baseParts.length; j > 0; j -= 1) {
                        mapValue = map[baseParts.slice(0, j).join('/')];

                        //baseName segment has  config, find if it has one for
                        //this name.
                        if (mapValue) {
                            mapValue = mapValue[nameSegment];
                            if (mapValue) {
                                //Match, update name to the new value.
                                foundMap = mapValue;
                                foundI = i;
                                break;
                            }
                        }
                    }
                }

                if (foundMap) {
                    break;
                }

                //Check for a star map match, but just hold on to it,
                //if there is a shorter segment match later in a matching
                //config, then favor over this star map.
                if (!foundStarMap && starMap && starMap[nameSegment]) {
                    foundStarMap = starMap[nameSegment];
                    starI = i;
                }
            }

            if (!foundMap && foundStarMap) {
                foundMap = foundStarMap;
                foundI = starI;
            }

            if (foundMap) {
                nameParts.splice(0, foundI, foundMap);
                name = nameParts.join('/');
            }
        }

        return name;
    }

    function makeRequire(relName, forceSync) {
        return function () {
            //A version of a require function that passes a moduleName
            //value for items that may need to
            //look up paths relative to the moduleName
            return req.apply(undef, aps.call(arguments, 0).concat([relName, forceSync]));
        };
    }

    function makeNormalize(relName) {
        return function (name) {
            return normalize(name, relName);
        };
    }

    function makeLoad(depName) {
        return function (value) {
            defined[depName] = value;
        };
    }

    function callDep(name) {
        if (hasProp(waiting, name)) {
            var args = waiting[name];
            delete waiting[name];
            defining[name] = true;
            main.apply(undef, args);
        }

        if (!hasProp(defined, name) && !hasProp(defining, name)) {
            throw new Error('No ' + name);
        }
        return defined[name];
    }

    //Turns a plugin!resource to [plugin, resource]
    //with the plugin being undefined if the name
    //did not have a plugin prefix.
    function splitPrefix(name) {
        var prefix,
            index = name ? name.indexOf('!') : -1;
        if (index > -1) {
            prefix = name.substring(0, index);
            name = name.substring(index + 1, name.length);
        }
        return [prefix, name];
    }

    /**
     * Makes a name map, normalizing the name, and using a plugin
     * for normalization if necessary. Grabs a ref to plugin
     * too, as an optimization.
     */
    makeMap = function (name, relName) {
        var plugin,
            parts = splitPrefix(name),
            prefix = parts[0];

        name = parts[1];

        if (prefix) {
            prefix = normalize(prefix, relName);
            plugin = callDep(prefix);
        }

        //Normalize according
        if (prefix) {
            if (plugin && plugin.normalize) {
                name = plugin.normalize(name, makeNormalize(relName));
            } else {
                name = normalize(name, relName);
            }
        } else {
            name = normalize(name, relName);
            parts = splitPrefix(name);
            prefix = parts[0];
            name = parts[1];
            if (prefix) {
                plugin = callDep(prefix);
            }
        }

        //Using ridiculous property names for space reasons
        return {
            f: prefix ? prefix + '!' + name : name, //fullName
            n: name,
            pr: prefix,
            p: plugin
        };
    };

    function makeConfig(name) {
        return function () {
            return (config && config.config && config.config[name]) || {};
        };
    }

    handlers = {
        require: function (name) {
            return makeRequire(name);
        },
        exports: function (name) {
            var e = defined[name];
            if (typeof e !== 'undefined') {
                return e;
            } else {
                return (defined[name] = {});
            }
        },
        module: function (name) {
            return {
                id: name,
                uri: '',
                exports: defined[name],
                config: makeConfig(name)
            };
        }
    };

    main = function (name, deps, callback, relName) {
        var cjsModule, depName, ret, map, i,
            args = [],
            usingExports;

        //Use name if no relName
        relName = relName || name;

        //Call the callback to define the module, if necessary.
        if (typeof callback === 'function') {

            //Pull out the defined dependencies and pass the ordered
            //values to the callback.
            //Default to [require, exports, module] if no deps
            deps = !deps.length && callback.length ? ['require', 'exports', 'module'] : deps;
            for (i = 0; i < deps.length; i += 1) {
                map = makeMap(deps[i], relName);
                depName = map.f;

                //Fast path CommonJS standard dependencies.
                if (depName === "require") {
                    args[i] = handlers.require(name);
                } else if (depName === "exports") {
                    //CommonJS module spec 1.1
                    args[i] = handlers.exports(name);
                    usingExports = true;
                } else if (depName === "module") {
                    //CommonJS module spec 1.1
                    cjsModule = args[i] = handlers.module(name);
                } else if (hasProp(defined, depName) ||
                           hasProp(waiting, depName) ||
                           hasProp(defining, depName)) {
                    args[i] = callDep(depName);
                } else if (map.p) {
                    map.p.load(map.n, makeRequire(relName, true), makeLoad(depName), {});
                    args[i] = defined[depName];
                } else {
                    throw new Error(name + ' missing ' + depName);
                }
            }

            ret = callback.apply(defined[name], args);

            if (name) {
                //If setting exports via "module" is in play,
                //favor that over return value and exports. After that,
                //favor a non-undefined return value over exports use.
                if (cjsModule && cjsModule.exports !== undef &&
                        cjsModule.exports !== defined[name]) {
                    defined[name] = cjsModule.exports;
                } else if (ret !== undef || !usingExports) {
                    //Use the return value from the function.
                    defined[name] = ret;
                }
            }
        } else if (name) {
            //May just be an object definition for the module. Only
            //worry about defining if have a module name.
            defined[name] = callback;
        }
    };

    requirejs = require = req = function (deps, callback, relName, forceSync, alt) {
        if (typeof deps === "string") {
            if (handlers[deps]) {
                //callback in this case is really relName
                return handlers[deps](callback);
            }
            //Just return the module wanted. In this scenario, the
            //deps arg is the module name, and second arg (if passed)
            //is just the relName.
            //Normalize module name, if it contains . or ..
            return callDep(makeMap(deps, callback).f);
        } else if (!deps.splice) {
            //deps is a config object, not an array.
            config = deps;
            if (callback.splice) {
                //callback is an array, which means it is a dependency list.
                //Adjust args if there are dependencies
                deps = callback;
                callback = relName;
                relName = null;
            } else {
                deps = undef;
            }
        }

        //Support require(['a'])
        callback = callback || function () {};

        //If relName is a function, it is an errback handler,
        //so remove it.
        if (typeof relName === 'function') {
            relName = forceSync;
            forceSync = alt;
        }

        //Simulate async callback;
        if (forceSync) {
            main(undef, deps, callback, relName);
        } else {
            //Using a non-zero value because of concern for what old browsers
            //do, and latest browsers "upgrade" to 4 if lower value is used:
            //http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#dom-windowtimers-settimeout:
            //If want a value immediately, use require('id') instead -- something
            //that works in almond on the global level, but not guaranteed and
            //unlikely to work in other AMD implementations.
            setTimeout(function () {
                main(undef, deps, callback, relName);
            }, 4);
        }

        return req;
    };

    /**
     * Just drops the config on the floor, but returns req in case
     * the config return value is used.
     */
    req.config = function (cfg) {
        config = cfg;
        if (config.deps) {
            req(config.deps, config.callback);
        }
        return req;
    };

    /**
     * Expose module registry for debugging and tooling
     */
    requirejs._defined = defined;

    define = function (name, deps, callback) {

        //This module may not have dependencies
        if (!deps.splice) {
            //deps is not an array, so probably means
            //an object literal or factory function for
            //the value. Adjust args.
            callback = deps;
            deps = [];
        }

        if (!hasProp(defined, name) && !hasProp(waiting, name)) {
            waiting[name] = [name, deps, callback];
        }
    };

    define.amd = {
        jQuery: true
    };
}());

define("vendor/almond", function(){});

/**
 * @license
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modern minus="template"`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
;(function() {

  /** Used as a safe reference for `undefined` in pre ES5 environments */
  var undefined;

  /** Used to pool arrays and objects used internally */
  var arrayPool = [],
      objectPool = [];

  /** Used to generate unique IDs */
  var idCounter = 0;

  /** Used to prefix keys to avoid issues with `__proto__` and properties on `Object.prototype` */
  var keyPrefix = +new Date + '';

  /** Used as the size when optimizations are enabled for large arrays */
  var largeArraySize = 75;

  /** Used as the max size of the `arrayPool` and `objectPool` */
  var maxPoolSize = 40;

  /** Used to detect and test whitespace */
  var whitespace = (
    // whitespace
    ' \t\x0B\f\xA0\ufeff' +

    // line terminators
    '\n\r\u2028\u2029' +

    // unicode category "Zs" space separators
    '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000'
  );

  /** Used to match regexp flags from their coerced string values */
  var reFlags = /\w*$/;

  /** Used to detected named functions */
  var reFuncName = /^\s*function[ \n\r\t]+\w/;

  /** Used to match leading whitespace and zeros to be removed */
  var reLeadingSpacesAndZeros = RegExp('^[' + whitespace + ']*0+(?=.$)');

  /** Used to detect functions containing a `this` reference */
  var reThis = /\bthis\b/;

  /** Used to assign default `context` object properties */
  var contextProps = [
    'Array', 'Boolean', 'Date', 'Function', 'Math', 'Number', 'Object',
    'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN',
    'parseInt', 'setTimeout'
  ];

  /** `Object#toString` result shortcuts */
  var argsClass = '[object Arguments]',
      arrayClass = '[object Array]',
      boolClass = '[object Boolean]',
      dateClass = '[object Date]',
      funcClass = '[object Function]',
      numberClass = '[object Number]',
      objectClass = '[object Object]',
      regexpClass = '[object RegExp]',
      stringClass = '[object String]';

  /** Used to identify object classifications that `_.clone` supports */
  var cloneableClasses = {};
  cloneableClasses[funcClass] = false;
  cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
  cloneableClasses[boolClass] = cloneableClasses[dateClass] =
  cloneableClasses[numberClass] = cloneableClasses[objectClass] =
  cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;

  /** Used as an internal `_.debounce` options object */
  var debounceOptions = {
    'leading': false,
    'maxWait': 0,
    'trailing': false
  };

  /** Used as the property descriptor for `__bindData__` */
  var descriptor = {
    'configurable': false,
    'enumerable': false,
    'value': null,
    'writable': false
  };

  /** Used to determine if values are of the language type Object */
  var objectTypes = {
    'boolean': false,
    'function': true,
    'object': true,
    'number': false,
    'string': false,
    'undefined': false
  };

  /** Used as a reference to the global object */
  var root = (objectTypes[typeof window] && window) || this;

  /** Detect free variable `exports` */
  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;

  /** Detect free variable `module` */
  var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports` */
  var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;

  /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
  var freeGlobal = objectTypes[typeof global] && global;
  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
    root = freeGlobal;
  }

  /*--------------------------------------------------------------------------*/

  /**
   * The base implementation of `_.indexOf` without support for binary searches
   * or `fromIndex` constraints.
   *
   * @private
   * @param {Array} array The array to search.
   * @param {*} value The value to search for.
   * @param {number} [fromIndex=0] The index to search from.
   * @returns {number} Returns the index of the matched value or `-1`.
   */
  function baseIndexOf(array, value, fromIndex) {
    var index = (fromIndex || 0) - 1,
        length = array ? array.length : 0;

    while (++index < length) {
      if (array[index] === value) {
        return index;
      }
    }
    return -1;
  }

  /**
   * An implementation of `_.contains` for cache objects that mimics the return
   * signature of `_.indexOf` by returning `0` if the value is found, else `-1`.
   *
   * @private
   * @param {Object} cache The cache object to inspect.
   * @param {*} value The value to search for.
   * @returns {number} Returns `0` if `value` is found, else `-1`.
   */
  function cacheIndexOf(cache, value) {
    var type = typeof value;
    cache = cache.cache;

    if (type == 'boolean' || value == null) {
      return cache[value] ? 0 : -1;
    }
    if (type != 'number' && type != 'string') {
      type = 'object';
    }
    var key = type == 'number' ? value : keyPrefix + value;
    cache = (cache = cache[type]) && cache[key];

    return type == 'object'
      ? (cache && baseIndexOf(cache, value) > -1 ? 0 : -1)
      : (cache ? 0 : -1);
  }

  /**
   * Adds a given value to the corresponding cache object.
   *
   * @private
   * @param {*} value The value to add to the cache.
   */
  function cachePush(value) {
    var cache = this.cache,
        type = typeof value;

    if (type == 'boolean' || value == null) {
      cache[value] = true;
    } else {
      if (type != 'number' && type != 'string') {
        type = 'object';
      }
      var key = type == 'number' ? value : keyPrefix + value,
          typeCache = cache[type] || (cache[type] = {});

      if (type == 'object') {
        (typeCache[key] || (typeCache[key] = [])).push(value);
      } else {
        typeCache[key] = true;
      }
    }
  }

  /**
   * Used by `_.max` and `_.min` as the default callback when a given
   * collection is a string value.
   *
   * @private
   * @param {string} value The character to inspect.
   * @returns {number} Returns the code unit of given character.
   */
  function charAtCallback(value) {
    return value.charCodeAt(0);
  }

  /**
   * Used by `sortBy` to compare transformed `collection` elements, stable sorting
   * them in ascending order.
   *
   * @private
   * @param {Object} a The object to compare to `b`.
   * @param {Object} b The object to compare to `a`.
   * @returns {number} Returns the sort order indicator of `1` or `-1`.
   */
  function compareAscending(a, b) {
    var ac = a.criteria,
        bc = b.criteria,
        index = -1,
        length = ac.length;

    while (++index < length) {
      var value = ac[index],
          other = bc[index];

      if (value !== other) {
        if (value > other || typeof value == 'undefined') {
          return 1;
        }
        if (value < other || typeof other == 'undefined') {
          return -1;
        }
      }
    }
    // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
    // that causes it, under certain circumstances, to return the same value for
    // `a` and `b`. See https://github.com/jashkenas/underscore/pull/1247
    //
    // This also ensures a stable sort in V8 and other engines.
    // See http://code.google.com/p/v8/issues/detail?id=90
    return a.index - b.index;
  }

  /**
   * Creates a cache object to optimize linear searches of large arrays.
   *
   * @private
   * @param {Array} [array=[]] The array to search.
   * @returns {null|Object} Returns the cache object or `null` if caching should not be used.
   */
  function createCache(array) {
    var index = -1,
        length = array.length,
        first = array[0],
        mid = array[(length / 2) | 0],
        last = array[length - 1];

    if (first && typeof first == 'object' &&
        mid && typeof mid == 'object' && last && typeof last == 'object') {
      return false;
    }
    var cache = getObject();
    cache['false'] = cache['null'] = cache['true'] = cache['undefined'] = false;

    var result = getObject();
    result.array = array;
    result.cache = cache;
    result.push = cachePush;

    while (++index < length) {
      result.push(array[index]);
    }
    return result;
  }

  /**
   * Gets an array from the array pool or creates a new one if the pool is empty.
   *
   * @private
   * @returns {Array} The array from the pool.
   */
  function getArray() {
    return arrayPool.pop() || [];
  }

  /**
   * Gets an object from the object pool or creates a new one if the pool is empty.
   *
   * @private
   * @returns {Object} The object from the pool.
   */
  function getObject() {
    return objectPool.pop() || {
      'array': null,
      'cache': null,
      'criteria': null,
      'false': false,
      'index': 0,
      'null': false,
      'number': null,
      'object': null,
      'push': null,
      'string': null,
      'true': false,
      'undefined': false,
      'value': null
    };
  }

  /**
   * Releases the given array back to the array pool.
   *
   * @private
   * @param {Array} [array] The array to release.
   */
  function releaseArray(array) {
    array.length = 0;
    if (arrayPool.length < maxPoolSize) {
      arrayPool.push(array);
    }
  }

  /**
   * Releases the given object back to the object pool.
   *
   * @private
   * @param {Object} [object] The object to release.
   */
  function releaseObject(object) {
    var cache = object.cache;
    if (cache) {
      releaseObject(cache);
    }
    object.array = object.cache = object.criteria = object.object = object.number = object.string = object.value = null;
    if (objectPool.length < maxPoolSize) {
      objectPool.push(object);
    }
  }

  /**
   * Slices the `collection` from the `start` index up to, but not including,
   * the `end` index.
   *
   * Note: This function is used instead of `Array#slice` to support node lists
   * in IE < 9 and to ensure dense arrays are returned.
   *
   * @private
   * @param {Array|Object|string} collection The collection to slice.
   * @param {number} start The start index.
   * @param {number} end The end index.
   * @returns {Array} Returns the new array.
   */
  function slice(array, start, end) {
    start || (start = 0);
    if (typeof end == 'undefined') {
      end = array ? array.length : 0;
    }
    var index = -1,
        length = end - start || 0,
        result = Array(length < 0 ? 0 : length);

    while (++index < length) {
      result[index] = array[start + index];
    }
    return result;
  }

  /*--------------------------------------------------------------------------*/

  /**
   * Create a new `lodash` function using the given context object.
   *
   * @static
   * @memberOf _
   * @category Utilities
   * @param {Object} [context=root] The context object.
   * @returns {Function} Returns the `lodash` function.
   */
  function runInContext(context) {
    // Avoid issues with some ES3 environments that attempt to use values, named
    // after built-in constructors like `Object`, for the creation of literals.
    // ES5 clears this up by stating that literals must use built-in constructors.
    // See http://es5.github.io/#x11.1.5.
    context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;

    /** Native constructor references */
    var Array = context.Array,
        Boolean = context.Boolean,
        Date = context.Date,
        Function = context.Function,
        Math = context.Math,
        Number = context.Number,
        Object = context.Object,
        RegExp = context.RegExp,
        String = context.String,
        TypeError = context.TypeError;

    /**
     * Used for `Array` method references.
     *
     * Normally `Array.prototype` would suffice, however, using an array literal
     * avoids issues in Narwhal.
     */
    var arrayRef = [];

    /** Used for native method references */
    var objectProto = Object.prototype;

    /** Used to restore the original `_` reference in `noConflict` */
    var oldDash = context._;

    /** Used to resolve the internal [[Class]] of values */
    var toString = objectProto.toString;

    /** Used to detect if a method is native */
    var reNative = RegExp('^' +
      String(toString)
        .replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
        .replace(/toString| for [^\]]+/g, '.*?') + '$'
    );

    /** Native method shortcuts */
    var ceil = Math.ceil,
        clearTimeout = context.clearTimeout,
        floor = Math.floor,
        fnToString = Function.prototype.toString,
        getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
        hasOwnProperty = objectProto.hasOwnProperty,
        push = arrayRef.push,
        setTimeout = context.setTimeout,
        splice = arrayRef.splice,
        unshift = arrayRef.unshift;

    /** Used to set meta data on functions */
    var defineProperty = (function() {
      // IE 8 only accepts DOM elements
      try {
        var o = {},
            func = isNative(func = Object.defineProperty) && func,
            result = func(o, o, o) && func;
      } catch(e) { }
      return result;
    }());

    /* Native method shortcuts for methods with the same name as other `lodash` methods */
    var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
        nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
        nativeIsFinite = context.isFinite,
        nativeIsNaN = context.isNaN,
        nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys,
        nativeMax = Math.max,
        nativeMin = Math.min,
        nativeParseInt = context.parseInt,
        nativeRandom = Math.random;

    /** Used to lookup a built-in constructor by [[Class]] */
    var ctorByClass = {};
    ctorByClass[arrayClass] = Array;
    ctorByClass[boolClass] = Boolean;
    ctorByClass[dateClass] = Date;
    ctorByClass[funcClass] = Function;
    ctorByClass[objectClass] = Object;
    ctorByClass[numberClass] = Number;
    ctorByClass[regexpClass] = RegExp;
    ctorByClass[stringClass] = String;

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object which wraps the given value to enable intuitive
     * method chaining.
     *
     * In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
     * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
     * and `unshift`
     *
     * Chaining is supported in custom builds as long as the `value` method is
     * implicitly or explicitly included in the build.
     *
     * The chainable wrapper functions are:
     * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`,
     * `compose`, `concat`, `countBy`, `create`, `createCallback`, `curry`,
     * `debounce`, `defaults`, `defer`, `delay`, `difference`, `filter`, `flatten`,
     * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
     * `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`,
     * `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`,
     * `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `pull`, `push`,
     * `range`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`,
     * `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `transform`,
     * `union`, `uniq`, `unshift`, `unzip`, `values`, `where`, `without`, `wrap`,
     * and `zip`
     *
     * The non-chainable wrapper functions are:
     * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `findIndex`,
     * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `has`, `identity`,
     * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`,
     * `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`,
     * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`,
     * `lastIndexOf`, `mixin`, `noConflict`, `parseInt`, `pop`, `random`, `reduce`,
     * `reduceRight`, `result`, `shift`, `size`, `some`, `sortedIndex`, `runInContext`,
     * `template`, `unescape`, `uniqueId`, and `value`
     *
     * The wrapper functions `first` and `last` return wrapped values when `n` is
     * provided, otherwise they return unwrapped values.
     *
     * Explicit chaining can be enabled by using the `_.chain` method.
     *
     * @name _
     * @constructor
     * @category Chaining
     * @param {*} value The value to wrap in a `lodash` instance.
     * @returns {Object} Returns a `lodash` instance.
     * @example
     *
     * var wrapped = _([1, 2, 3]);
     *
     * // returns an unwrapped value
     * wrapped.reduce(function(sum, num) {
     *   return sum + num;
     * });
     * // => 6
     *
     * // returns a wrapped value
     * var squares = wrapped.map(function(num) {
     *   return num * num;
     * });
     *
     * _.isArray(squares);
     * // => false
     *
     * _.isArray(squares.value());
     * // => true
     */
    function lodash(value) {
      // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor
      return (value && typeof value == 'object' && !isArray(value) && hasOwnProperty.call(value, '__wrapped__'))
       ? value
       : new lodashWrapper(value);
    }

    /**
     * A fast path for creating `lodash` wrapper objects.
     *
     * @private
     * @param {*} value The value to wrap in a `lodash` instance.
     * @param {boolean} chainAll A flag to enable chaining for all methods
     * @returns {Object} Returns a `lodash` instance.
     */
    function lodashWrapper(value, chainAll) {
      this.__chain__ = !!chainAll;
      this.__wrapped__ = value;
    }
    // ensure `new lodashWrapper` is an instance of `lodash`
    lodashWrapper.prototype = lodash.prototype;

    /**
     * An object used to flag environments features.
     *
     * @static
     * @memberOf _
     * @type Object
     */
    var support = lodash.support = {};

    /**
     * Detect if functions can be decompiled by `Function#toString`
     * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps).
     *
     * @memberOf _.support
     * @type boolean
     */
    support.funcDecomp = !isNative(context.WinRTError) && reThis.test(runInContext);

    /**
     * Detect if `Function#name` is supported (all but IE).
     *
     * @memberOf _.support
     * @type boolean
     */
    support.funcNames = typeof Function.name == 'string';

    /*--------------------------------------------------------------------------*/

    /**
     * The base implementation of `_.bind` that creates the bound function and
     * sets its meta data.
     *
     * @private
     * @param {Array} bindData The bind data array.
     * @returns {Function} Returns the new bound function.
     */
    function baseBind(bindData) {
      var func = bindData[0],
          partialArgs = bindData[2],
          thisArg = bindData[4];

      function bound() {
        // `Function#bind` spec
        // http://es5.github.io/#x15.3.4.5
        if (partialArgs) {
          // avoid `arguments` object deoptimizations by using `slice` instead
          // of `Array.prototype.slice.call` and not assigning `arguments` to a
          // variable as a ternary expression
          var args = slice(partialArgs);
          push.apply(args, arguments);
        }
        // mimic the constructor's `return` behavior
        // http://es5.github.io/#x13.2.2
        if (this instanceof bound) {
          // ensure `new bound` is an instance of `func`
          var thisBinding = baseCreate(func.prototype),
              result = func.apply(thisBinding, args || arguments);
          return isObject(result) ? result : thisBinding;
        }
        return func.apply(thisArg, args || arguments);
      }
      setBindData(bound, bindData);
      return bound;
    }

    /**
     * The base implementation of `_.clone` without argument juggling or support
     * for `thisArg` binding.
     *
     * @private
     * @param {*} value The value to clone.
     * @param {boolean} [isDeep=false] Specify a deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {Array} [stackA=[]] Tracks traversed source objects.
     * @param {Array} [stackB=[]] Associates clones with source counterparts.
     * @returns {*} Returns the cloned value.
     */
    function baseClone(value, isDeep, callback, stackA, stackB) {
      if (callback) {
        var result = callback(value);
        if (typeof result != 'undefined') {
          return result;
        }
      }
      // inspect [[Class]]
      var isObj = isObject(value);
      if (isObj) {
        var className = toString.call(value);
        if (!cloneableClasses[className]) {
          return value;
        }
        var ctor = ctorByClass[className];
        switch (className) {
          case boolClass:
          case dateClass:
            return new ctor(+value);

          case numberClass:
          case stringClass:
            return new ctor(value);

          case regexpClass:
            result = ctor(value.source, reFlags.exec(value));
            result.lastIndex = value.lastIndex;
            return result;
        }
      } else {
        return value;
      }
      var isArr = isArray(value);
      if (isDeep) {
        // check for circular references and return corresponding clone
        var initedStack = !stackA;
        stackA || (stackA = getArray());
        stackB || (stackB = getArray());

        var length = stackA.length;
        while (length--) {
          if (stackA[length] == value) {
            return stackB[length];
          }
        }
        result = isArr ? ctor(value.length) : {};
      }
      else {
        result = isArr ? slice(value) : assign({}, value);
      }
      // add array properties assigned by `RegExp#exec`
      if (isArr) {
        if (hasOwnProperty.call(value, 'index')) {
          result.index = value.index;
        }
        if (hasOwnProperty.call(value, 'input')) {
          result.input = value.input;
        }
      }
      // exit for shallow clone
      if (!isDeep) {
        return result;
      }
      // add the source value to the stack of traversed objects
      // and associate it with its clone
      stackA.push(value);
      stackB.push(result);

      // recursively populate clone (susceptible to call stack limits)
      (isArr ? forEach : forOwn)(value, function(objValue, key) {
        result[key] = baseClone(objValue, isDeep, callback, stackA, stackB);
      });

      if (initedStack) {
        releaseArray(stackA);
        releaseArray(stackB);
      }
      return result;
    }

    /**
     * The base implementation of `_.create` without support for assigning
     * properties to the created object.
     *
     * @private
     * @param {Object} prototype The object to inherit from.
     * @returns {Object} Returns the new object.
     */
    function baseCreate(prototype, properties) {
      return isObject(prototype) ? nativeCreate(prototype) : {};
    }
    // fallback for browsers without `Object.create`
    if (!nativeCreate) {
      baseCreate = (function() {
        function Object() {}
        return function(prototype) {
          if (isObject(prototype)) {
            Object.prototype = prototype;
            var result = new Object;
            Object.prototype = null;
          }
          return result || context.Object();
        };
      }());
    }

    /**
     * The base implementation of `_.createCallback` without support for creating
     * "_.pluck" or "_.where" style callbacks.
     *
     * @private
     * @param {*} [func=identity] The value to convert to a callback.
     * @param {*} [thisArg] The `this` binding of the created callback.
     * @param {number} [argCount] The number of arguments the callback accepts.
     * @returns {Function} Returns a callback function.
     */
    function baseCreateCallback(func, thisArg, argCount) {
      if (typeof func != 'function') {
        return identity;
      }
      // exit early for no `thisArg` or already bound by `Function#bind`
      if (typeof thisArg == 'undefined' || !('prototype' in func)) {
        return func;
      }
      var bindData = func.__bindData__;
      if (typeof bindData == 'undefined') {
        if (support.funcNames) {
          bindData = !func.name;
        }
        bindData = bindData || !support.funcDecomp;
        if (!bindData) {
          var source = fnToString.call(func);
          if (!support.funcNames) {
            bindData = !reFuncName.test(source);
          }
          if (!bindData) {
            // checks if `func` references the `this` keyword and stores the result
            bindData = reThis.test(source);
            setBindData(func, bindData);
          }
        }
      }
      // exit early if there are no `this` references or `func` is bound
      if (bindData === false || (bindData !== true && bindData[1] & 1)) {
        return func;
      }
      switch (argCount) {
        case 1: return function(value) {
          return func.call(thisArg, value);
        };
        case 2: return function(a, b) {
          return func.call(thisArg, a, b);
        };
        case 3: return function(value, index, collection) {
          return func.call(thisArg, value, index, collection);
        };
        case 4: return function(accumulator, value, index, collection) {
          return func.call(thisArg, accumulator, value, index, collection);
        };
      }
      return bind(func, thisArg);
    }

    /**
     * The base implementation of `createWrapper` that creates the wrapper and
     * sets its meta data.
     *
     * @private
     * @param {Array} bindData The bind data array.
     * @returns {Function} Returns the new function.
     */
    function baseCreateWrapper(bindData) {
      var func = bindData[0],
          bitmask = bindData[1],
          partialArgs = bindData[2],
          partialRightArgs = bindData[3],
          thisArg = bindData[4],
          arity = bindData[5];

      var isBind = bitmask & 1,
          isBindKey = bitmask & 2,
          isCurry = bitmask & 4,
          isCurryBound = bitmask & 8,
          key = func;

      function bound() {
        var thisBinding = isBind ? thisArg : this;
        if (partialArgs) {
          var args = slice(partialArgs);
          push.apply(args, arguments);
        }
        if (partialRightArgs || isCurry) {
          args || (args = slice(arguments));
          if (partialRightArgs) {
            push.apply(args, partialRightArgs);
          }
          if (isCurry && args.length < arity) {
            bitmask |= 16 & ~32;
            return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
          }
        }
        args || (args = arguments);
        if (isBindKey) {
          func = thisBinding[key];
        }
        if (this instanceof bound) {
          thisBinding = baseCreate(func.prototype);
          var result = func.apply(thisBinding, args);
          return isObject(result) ? result : thisBinding;
        }
        return func.apply(thisBinding, args);
      }
      setBindData(bound, bindData);
      return bound;
    }

    /**
     * The base implementation of `_.difference` that accepts a single array
     * of values to exclude.
     *
     * @private
     * @param {Array} array The array to process.
     * @param {Array} [values] The array of values to exclude.
     * @returns {Array} Returns a new array of filtered values.
     */
    function baseDifference(array, values) {
      var index = -1,
          indexOf = getIndexOf(),
          length = array ? array.length : 0,
          isLarge = length >= largeArraySize && indexOf === baseIndexOf,
          result = [];

      if (isLarge) {
        var cache = createCache(values);
        if (cache) {
          indexOf = cacheIndexOf;
          values = cache;
        } else {
          isLarge = false;
        }
      }
      while (++index < length) {
        var value = array[index];
        if (indexOf(values, value) < 0) {
          result.push(value);
        }
      }
      if (isLarge) {
        releaseObject(values);
      }
      return result;
    }

    /**
     * The base implementation of `_.flatten` without support for callback
     * shorthands or `thisArg` binding.
     *
     * @private
     * @param {Array} array The array to flatten.
     * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
     * @param {boolean} [isStrict=false] A flag to restrict flattening to arrays and `arguments` objects.
     * @param {number} [fromIndex=0] The index to start from.
     * @returns {Array} Returns a new flattened array.
     */
    function baseFlatten(array, isShallow, isStrict, fromIndex) {
      var index = (fromIndex || 0) - 1,
          length = array ? array.length : 0,
          result = [];

      while (++index < length) {
        var value = array[index];

        if (value && typeof value == 'object' && typeof value.length == 'number'
            && (isArray(value) || isArguments(value))) {
          // recursively flatten arrays (susceptible to call stack limits)
          if (!isShallow) {
            value = baseFlatten(value, isShallow, isStrict);
          }
          var valIndex = -1,
              valLength = value.length,
              resIndex = result.length;

          result.length += valLength;
          while (++valIndex < valLength) {
            result[resIndex++] = value[valIndex];
          }
        } else if (!isStrict) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.isEqual`, without support for `thisArg` binding,
     * that allows partial "_.where" style comparisons.
     *
     * @private
     * @param {*} a The value to compare.
     * @param {*} b The other value to compare.
     * @param {Function} [callback] The function to customize comparing values.
     * @param {Function} [isWhere=false] A flag to indicate performing partial comparisons.
     * @param {Array} [stackA=[]] Tracks traversed `a` objects.
     * @param {Array} [stackB=[]] Tracks traversed `b` objects.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     */
    function baseIsEqual(a, b, callback, isWhere, stackA, stackB) {
      // used to indicate that when comparing objects, `a` has at least the properties of `b`
      if (callback) {
        var result = callback(a, b);
        if (typeof result != 'undefined') {
          return !!result;
        }
      }
      // exit early for identical values
      if (a === b) {
        // treat `+0` vs. `-0` as not equal
        return a !== 0 || (1 / a == 1 / b);
      }
      var type = typeof a,
          otherType = typeof b;

      // exit early for unlike primitive values
      if (a === a &&
          !(a && objectTypes[type]) &&
          !(b && objectTypes[otherType])) {
        return false;
      }
      // exit early for `null` and `undefined` avoiding ES3's Function#call behavior
      // http://es5.github.io/#x15.3.4.4
      if (a == null || b == null) {
        return a === b;
      }
      // compare [[Class]] names
      var className = toString.call(a),
          otherClass = toString.call(b);

      if (className == argsClass) {
        className = objectClass;
      }
      if (otherClass == argsClass) {
        otherClass = objectClass;
      }
      if (className != otherClass) {
        return false;
      }
      switch (className) {
        case boolClass:
        case dateClass:
          // coerce dates and booleans to numbers, dates to milliseconds and booleans
          // to `1` or `0` treating invalid dates coerced to `NaN` as not equal
          return +a == +b;

        case numberClass:
          // treat `NaN` vs. `NaN` as equal
          return (a != +a)
            ? b != +b
            // but treat `+0` vs. `-0` as not equal
            : (a == 0 ? (1 / a == 1 / b) : a == +b);

        case regexpClass:
        case stringClass:
          // coerce regexes to strings (http://es5.github.io/#x15.10.6.4)
          // treat string primitives and their corresponding object instances as equal
          return a == String(b);
      }
      var isArr = className == arrayClass;
      if (!isArr) {
        // unwrap any `lodash` wrapped values
        var aWrapped = hasOwnProperty.call(a, '__wrapped__'),
            bWrapped = hasOwnProperty.call(b, '__wrapped__');

        if (aWrapped || bWrapped) {
          return baseIsEqual(aWrapped ? a.__wrapped__ : a, bWrapped ? b.__wrapped__ : b, callback, isWhere, stackA, stackB);
        }
        // exit for functions and DOM nodes
        if (className != objectClass) {
          return false;
        }
        // in older versions of Opera, `arguments` objects have `Array` constructors
        var ctorA = a.constructor,
            ctorB = b.constructor;

        // non `Object` object instances with different constructors are not equal
        if (ctorA != ctorB &&
              !(isFunction(ctorA) && ctorA instanceof ctorA && isFunction(ctorB) && ctorB instanceof ctorB) &&
              ('constructor' in a && 'constructor' in b)
            ) {
          return false;
        }
      }
      // assume cyclic structures are equal
      // the algorithm for detecting cyclic structures is adapted from ES 5.1
      // section 15.12.3, abstract operation `JO` (http://es5.github.io/#x15.12.3)
      var initedStack = !stackA;
      stackA || (stackA = getArray());
      stackB || (stackB = getArray());

      var length = stackA.length;
      while (length--) {
        if (stackA[length] == a) {
          return stackB[length] == b;
        }
      }
      var size = 0;
      result = true;

      // add `a` and `b` to the stack of traversed objects
      stackA.push(a);
      stackB.push(b);

      // recursively compare objects and arrays (susceptible to call stack limits)
      if (isArr) {
        // compare lengths to determine if a deep comparison is necessary
        length = a.length;
        size = b.length;
        result = size == length;

        if (result || isWhere) {
          // deep compare the contents, ignoring non-numeric properties
          while (size--) {
            var index = length,
                value = b[size];

            if (isWhere) {
              while (index--) {
                if ((result = baseIsEqual(a[index], value, callback, isWhere, stackA, stackB))) {
                  break;
                }
              }
            } else if (!(result = baseIsEqual(a[size], value, callback, isWhere, stackA, stackB))) {
              break;
            }
          }
        }
      }
      else {
        // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys`
        // which, in this case, is more costly
        forIn(b, function(value, key, b) {
          if (hasOwnProperty.call(b, key)) {
            // count the number of properties.
            size++;
            // deep compare each property value.
            return (result = hasOwnProperty.call(a, key) && baseIsEqual(a[key], value, callback, isWhere, stackA, stackB));
          }
        });

        if (result && !isWhere) {
          // ensure both objects have the same number of properties
          forIn(a, function(value, key, a) {
            if (hasOwnProperty.call(a, key)) {
              // `size` will be `-1` if `a` has more properties than `b`
              return (result = --size > -1);
            }
          });
        }
      }
      stackA.pop();
      stackB.pop();

      if (initedStack) {
        releaseArray(stackA);
        releaseArray(stackB);
      }
      return result;
    }

    /**
     * The base implementation of `_.merge` without argument juggling or support
     * for `thisArg` binding.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {Function} [callback] The function to customize merging properties.
     * @param {Array} [stackA=[]] Tracks traversed source objects.
     * @param {Array} [stackB=[]] Associates values with source counterparts.
     */
    function baseMerge(object, source, callback, stackA, stackB) {
      (isArray(source) ? forEach : forOwn)(source, function(source, key) {
        var found,
            isArr,
            result = source,
            value = object[key];

        if (source && ((isArr = isArray(source)) || isPlainObject(source))) {
          // avoid merging previously merged cyclic sources
          var stackLength = stackA.length;
          while (stackLength--) {
            if ((found = stackA[stackLength] == source)) {
              value = stackB[stackLength];
              break;
            }
          }
          if (!found) {
            var isShallow;
            if (callback) {
              result = callback(value, source);
              if ((isShallow = typeof result != 'undefined')) {
                value = result;
              }
            }
            if (!isShallow) {
              value = isArr
                ? (isArray(value) ? value : [])
                : (isPlainObject(value) ? value : {});
            }
            // add `source` and associated `value` to the stack of traversed objects
            stackA.push(source);
            stackB.push(value);

            // recursively merge objects and arrays (susceptible to call stack limits)
            if (!isShallow) {
              baseMerge(value, source, callback, stackA, stackB);
            }
          }
        }
        else {
          if (callback) {
            result = callback(value, source);
            if (typeof result == 'undefined') {
              result = source;
            }
          }
          if (typeof result != 'undefined') {
            value = result;
          }
        }
        object[key] = value;
      });
    }

    /**
     * The base implementation of `_.random` without argument juggling or support
     * for returning floating-point numbers.
     *
     * @private
     * @param {number} min The minimum possible value.
     * @param {number} max The maximum possible value.
     * @returns {number} Returns a random number.
     */
    function baseRandom(min, max) {
      return min + floor(nativeRandom() * (max - min + 1));
    }

    /**
     * The base implementation of `_.uniq` without support for callback shorthands
     * or `thisArg` binding.
     *
     * @private
     * @param {Array} array The array to process.
     * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
     * @param {Function} [callback] The function called per iteration.
     * @returns {Array} Returns a duplicate-value-free array.
     */
    function baseUniq(array, isSorted, callback) {
      var index = -1,
          indexOf = getIndexOf(),
          length = array ? array.length : 0,
          result = [];

      var isLarge = !isSorted && length >= largeArraySize && indexOf === baseIndexOf,
          seen = (callback || isLarge) ? getArray() : result;

      if (isLarge) {
        var cache = createCache(seen);
        indexOf = cacheIndexOf;
        seen = cache;
      }
      while (++index < length) {
        var value = array[index],
            computed = callback ? callback(value, index, array) : value;

        if (isSorted
              ? !index || seen[seen.length - 1] !== computed
              : indexOf(seen, computed) < 0
            ) {
          if (callback || isLarge) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      if (isLarge) {
        releaseArray(seen.array);
        releaseObject(seen);
      } else if (callback) {
        releaseArray(seen);
      }
      return result;
    }

    /**
     * Creates a function that aggregates a collection, creating an object composed
     * of keys generated from the results of running each element of the collection
     * through a callback. The given `setter` function sets the keys and values
     * of the composed object.
     *
     * @private
     * @param {Function} setter The setter function.
     * @returns {Function} Returns the new aggregator function.
     */
    function createAggregator(setter) {
      return function(collection, callback, thisArg) {
        var result = {};
        callback = lodash.createCallback(callback, thisArg, 3);

        var index = -1,
            length = collection ? collection.length : 0;

        if (typeof length == 'number') {
          while (++index < length) {
            var value = collection[index];
            setter(result, value, callback(value, index, collection), collection);
          }
        } else {
          forOwn(collection, function(value, key, collection) {
            setter(result, value, callback(value, key, collection), collection);
          });
        }
        return result;
      };
    }

    /**
     * Creates a function that, when called, either curries or invokes `func`
     * with an optional `this` binding and partially applied arguments.
     *
     * @private
     * @param {Function|string} func The function or method name to reference.
     * @param {number} bitmask The bitmask of method flags to compose.
     *  The bitmask may be composed of the following flags:
     *  1 - `_.bind`
     *  2 - `_.bindKey`
     *  4 - `_.curry`
     *  8 - `_.curry` (bound)
     *  16 - `_.partial`
     *  32 - `_.partialRight`
     * @param {Array} [partialArgs] An array of arguments to prepend to those
     *  provided to the new function.
     * @param {Array} [partialRightArgs] An array of arguments to append to those
     *  provided to the new function.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new function.
     */
    function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
      var isBind = bitmask & 1,
          isBindKey = bitmask & 2,
          isCurry = bitmask & 4,
          isCurryBound = bitmask & 8,
          isPartial = bitmask & 16,
          isPartialRight = bitmask & 32;

      if (!isBindKey && !isFunction(func)) {
        throw new TypeError;
      }
      if (isPartial && !partialArgs.length) {
        bitmask &= ~16;
        isPartial = partialArgs = false;
      }
      if (isPartialRight && !partialRightArgs.length) {
        bitmask &= ~32;
        isPartialRight = partialRightArgs = false;
      }
      var bindData = func && func.__bindData__;
      if (bindData && bindData !== true) {
        // clone `bindData`
        bindData = slice(bindData);
        if (bindData[2]) {
          bindData[2] = slice(bindData[2]);
        }
        if (bindData[3]) {
          bindData[3] = slice(bindData[3]);
        }
        // set `thisBinding` is not previously bound
        if (isBind && !(bindData[1] & 1)) {
          bindData[4] = thisArg;
        }
        // set if previously bound but not currently (subsequent curried functions)
        if (!isBind && bindData[1] & 1) {
          bitmask |= 8;
        }
        // set curried arity if not yet set
        if (isCurry && !(bindData[1] & 4)) {
          bindData[5] = arity;
        }
        // append partial left arguments
        if (isPartial) {
          push.apply(bindData[2] || (bindData[2] = []), partialArgs);
        }
        // append partial right arguments
        if (isPartialRight) {
          unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs);
        }
        // merge flags
        bindData[1] |= bitmask;
        return createWrapper.apply(null, bindData);
      }
      // fast path for `_.bind`
      var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
      return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
    }

    /**
     * Used by `escape` to convert characters to HTML entities.
     *
     * @private
     * @param {string} match The matched character to escape.
     * @returns {string} Returns the escaped character.
     */
    function escapeHtmlChar(match) {
      return htmlEscapes[match];
    }

    /**
     * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
     * customized, this method returns the custom method, otherwise it returns
     * the `baseIndexOf` function.
     *
     * @private
     * @returns {Function} Returns the "indexOf" function.
     */
    function getIndexOf() {
      var result = (result = lodash.indexOf) === indexOf ? baseIndexOf : result;
      return result;
    }

    /**
     * Checks if `value` is a native function.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a native function, else `false`.
     */
    function isNative(value) {
      return typeof value == 'function' && reNative.test(value);
    }

    /**
     * Sets `this` binding data on a given function.
     *
     * @private
     * @param {Function} func The function to set data on.
     * @param {Array} value The data array to set.
     */
    var setBindData = !defineProperty ? noop : function(func, value) {
      descriptor.value = value;
      defineProperty(func, '__bindData__', descriptor);
    };

    /**
     * A fallback implementation of `isPlainObject` which checks if a given value
     * is an object created by the `Object` constructor, assuming objects created
     * by the `Object` constructor have no inherited enumerable properties and that
     * there are no `Object.prototype` extensions.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     */
    function shimIsPlainObject(value) {
      var ctor,
          result;

      // avoid non Object objects, `arguments` objects, and DOM elements
      if (!(value && toString.call(value) == objectClass) ||
          (ctor = value.constructor, isFunction(ctor) && !(ctor instanceof ctor))) {
        return false;
      }
      // In most environments an object's own properties are iterated before
      // its inherited properties. If the last iterated property is an object's
      // own property then there are no inherited enumerable properties.
      forIn(value, function(value, key) {
        result = key;
      });
      return typeof result == 'undefined' || hasOwnProperty.call(value, result);
    }

    /**
     * Used by `unescape` to convert HTML entities to characters.
     *
     * @private
     * @param {string} match The matched character to unescape.
     * @returns {string} Returns the unescaped character.
     */
    function unescapeHtmlChar(match) {
      return htmlUnescapes[match];
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Checks if `value` is an `arguments` object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is an `arguments` object, else `false`.
     * @example
     *
     * (function() { return _.isArguments(arguments); })(1, 2, 3);
     * // => true
     *
     * _.isArguments([1, 2, 3]);
     * // => false
     */
    function isArguments(value) {
      return value && typeof value == 'object' && typeof value.length == 'number' &&
        toString.call(value) == argsClass || false;
    }

    /**
     * Checks if `value` is an array.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is an array, else `false`.
     * @example
     *
     * (function() { return _.isArray(arguments); })();
     * // => false
     *
     * _.isArray([1, 2, 3]);
     * // => true
     */
    var isArray = nativeIsArray || function(value) {
      return value && typeof value == 'object' && typeof value.length == 'number' &&
        toString.call(value) == arrayClass || false;
    };

    /**
     * A fallback implementation of `Object.keys` which produces an array of the
     * given object's own enumerable property names.
     *
     * @private
     * @type Function
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property names.
     */
    var shimKeys = function(object) {
      var index, iterable = object, result = [];
      if (!iterable) return result;
      if (!(objectTypes[typeof object])) return result;
        for (index in iterable) {
          if (hasOwnProperty.call(iterable, index)) {
            result.push(index);
          }
        }
      return result
    };

    /**
     * Creates an array composed of the own enumerable property names of an object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property names.
     * @example
     *
     * _.keys({ 'one': 1, 'two': 2, 'three': 3 });
     * // => ['one', 'two', 'three'] (property order is not guaranteed across environments)
     */
    var keys = !nativeKeys ? shimKeys : function(object) {
      if (!isObject(object)) {
        return [];
      }
      return nativeKeys(object);
    };

    /**
     * Used to convert characters to HTML entities:
     *
     * Though the `>` character is escaped for symmetry, characters like `>` and `/`
     * don't require escaping in HTML and have no special meaning unless they're part
     * of a tag or an unquoted attribute value.
     * http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact")
     */
    var htmlEscapes = {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#39;'
    };

    /** Used to convert HTML entities to characters */
    var htmlUnescapes = invert(htmlEscapes);

    /** Used to match HTML entities and HTML characters */
    var reEscapedHtml = RegExp('(' + keys(htmlUnescapes).join('|') + ')', 'g'),
        reUnescapedHtml = RegExp('[' + keys(htmlEscapes).join('') + ']', 'g');

    /*--------------------------------------------------------------------------*/

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object. Subsequent sources will overwrite property assignments of previous
     * sources. If a callback is provided it will be executed to produce the
     * assigned values. The callback is bound to `thisArg` and invoked with two
     * arguments; (objectValue, sourceValue).
     *
     * @static
     * @memberOf _
     * @type Function
     * @alias extend
     * @category Objects
     * @param {Object} object The destination object.
     * @param {...Object} [source] The source objects.
     * @param {Function} [callback] The function to customize assigning values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * _.assign({ 'name': 'fred' }, { 'employer': 'slate' });
     * // => { 'name': 'fred', 'employer': 'slate' }
     *
     * var defaults = _.partialRight(_.assign, function(a, b) {
     *   return typeof a == 'undefined' ? b : a;
     * });
     *
     * var object = { 'name': 'barney' };
     * defaults(object, { 'name': 'fred', 'employer': 'slate' });
     * // => { 'name': 'barney', 'employer': 'slate' }
     */
    var assign = function(object, source, guard) {
      var index, iterable = object, result = iterable;
      if (!iterable) return result;
      var args = arguments,
          argsIndex = 0,
          argsLength = typeof guard == 'number' ? 2 : args.length;
      if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {
        var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);
      } else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {
        callback = args[--argsLength];
      }
      while (++argsIndex < argsLength) {
        iterable = args[argsIndex];
        if (iterable && objectTypes[typeof iterable]) {
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          result[index] = callback ? callback(result[index], iterable[index]) : iterable[index];
        }
        }
      }
      return result
    };

    /**
     * Creates a clone of `value`. If `isDeep` is `true` nested objects will also
     * be cloned, otherwise they will be assigned by reference. If a callback
     * is provided it will be executed to produce the cloned values. If the
     * callback returns `undefined` cloning will be handled by the method instead.
     * The callback is bound to `thisArg` and invoked with one argument; (value).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to clone.
     * @param {boolean} [isDeep=false] Specify a deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the cloned value.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * var shallow = _.clone(characters);
     * shallow[0] === characters[0];
     * // => true
     *
     * var deep = _.clone(characters, true);
     * deep[0] === characters[0];
     * // => false
     *
     * _.mixin({
     *   'clone': _.partialRight(_.clone, function(value) {
     *     return _.isElement(value) ? value.cloneNode(false) : undefined;
     *   })
     * });
     *
     * var clone = _.clone(document.body);
     * clone.childNodes.length;
     * // => 0
     */
    function clone(value, isDeep, callback, thisArg) {
      // allows working with "Collections" methods without using their `index`
      // and `collection` arguments for `isDeep` and `callback`
      if (typeof isDeep != 'boolean' && isDeep != null) {
        thisArg = callback;
        callback = isDeep;
        isDeep = false;
      }
      return baseClone(value, isDeep, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
    }

    /**
     * Creates a deep clone of `value`. If a callback is provided it will be
     * executed to produce the cloned values. If the callback returns `undefined`
     * cloning will be handled by the method instead. The callback is bound to
     * `thisArg` and invoked with one argument; (value).
     *
     * Note: This method is loosely based on the structured clone algorithm. Functions
     * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
     * objects created by constructors other than `Object` are cloned to plain `Object` objects.
     * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the deep cloned value.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * var deep = _.cloneDeep(characters);
     * deep[0] === characters[0];
     * // => false
     *
     * var view = {
     *   'label': 'docs',
     *   'node': element
     * };
     *
     * var clone = _.cloneDeep(view, function(value) {
     *   return _.isElement(value) ? value.cloneNode(true) : undefined;
     * });
     *
     * clone.node == view.node;
     * // => false
     */
    function cloneDeep(value, callback, thisArg) {
      return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
    }

    /**
     * Creates an object that inherits from the given `prototype` object. If a
     * `properties` object is provided its own enumerable properties are assigned
     * to the created object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} prototype The object to inherit from.
     * @param {Object} [properties] The properties to assign to the object.
     * @returns {Object} Returns the new object.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * function Circle() {
     *   Shape.call(this);
     * }
     *
     * Circle.prototype = _.create(Shape.prototype, { 'constructor': Circle });
     *
     * var circle = new Circle;
     * circle instanceof Circle;
     * // => true
     *
     * circle instanceof Shape;
     * // => true
     */
    function create(prototype, properties) {
      var result = baseCreate(prototype);
      return properties ? assign(result, properties) : result;
    }

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object for all destination properties that resolve to `undefined`. Once a
     * property is set, additional defaults of the same property will be ignored.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The destination object.
     * @param {...Object} [source] The source objects.
     * @param- {Object} [guard] Allows working with `_.reduce` without using its
     *  `key` and `object` arguments as sources.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * var object = { 'name': 'barney' };
     * _.defaults(object, { 'name': 'fred', 'employer': 'slate' });
     * // => { 'name': 'barney', 'employer': 'slate' }
     */
    var defaults = function(object, source, guard) {
      var index, iterable = object, result = iterable;
      if (!iterable) return result;
      var args = arguments,
          argsIndex = 0,
          argsLength = typeof guard == 'number' ? 2 : args.length;
      while (++argsIndex < argsLength) {
        iterable = args[argsIndex];
        if (iterable && objectTypes[typeof iterable]) {
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          if (typeof result[index] == 'undefined') result[index] = iterable[index];
        }
        }
      }
      return result
    };

    /**
     * This method is like `_.findIndex` except that it returns the key of the
     * first element that passes the callback check, instead of the element itself.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to search.
     * @param {Function|Object|string} [callback=identity] The function called per
     *  iteration. If a property name or object is provided it will be used to
     *  create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {string|undefined} Returns the key of the found element, else `undefined`.
     * @example
     *
     * var characters = {
     *   'barney': {  'age': 36, 'blocked': false },
     *   'fred': {    'age': 40, 'blocked': true },
     *   'pebbles': { 'age': 1,  'blocked': false }
     * };
     *
     * _.findKey(characters, function(chr) {
     *   return chr.age < 40;
     * });
     * // => 'barney' (property order is not guaranteed across environments)
     *
     * // using "_.where" callback shorthand
     * _.findKey(characters, { 'age': 1 });
     * // => 'pebbles'
     *
     * // using "_.pluck" callback shorthand
     * _.findKey(characters, 'blocked');
     * // => 'fred'
     */
    function findKey(object, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);
      forOwn(object, function(value, key, object) {
        if (callback(value, key, object)) {
          result = key;
          return false;
        }
      });
      return result;
    }

    /**
     * This method is like `_.findKey` except that it iterates over elements
     * of a `collection` in the opposite order.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to search.
     * @param {Function|Object|string} [callback=identity] The function called per
     *  iteration. If a property name or object is provided it will be used to
     *  create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {string|undefined} Returns the key of the found element, else `undefined`.
     * @example
     *
     * var characters = {
     *   'barney': {  'age': 36, 'blocked': true },
     *   'fred': {    'age': 40, 'blocked': false },
     *   'pebbles': { 'age': 1,  'blocked': true }
     * };
     *
     * _.findLastKey(characters, function(chr) {
     *   return chr.age < 40;
     * });
     * // => returns `pebbles`, assuming `_.findKey` returns `barney`
     *
     * // using "_.where" callback shorthand
     * _.findLastKey(characters, { 'age': 40 });
     * // => 'fred'
     *
     * // using "_.pluck" callback shorthand
     * _.findLastKey(characters, 'blocked');
     * // => 'pebbles'
     */
    function findLastKey(object, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);
      forOwnRight(object, function(value, key, object) {
        if (callback(value, key, object)) {
          result = key;
          return false;
        }
      });
      return result;
    }

    /**
     * Iterates over own and inherited enumerable properties of an object,
     * executing the callback for each property. The callback is bound to `thisArg`
     * and invoked with three arguments; (value, key, object). Callbacks may exit
     * iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * Shape.prototype.move = function(x, y) {
     *   this.x += x;
     *   this.y += y;
     * };
     *
     * _.forIn(new Shape, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'x', 'y', and 'move' (property order is not guaranteed across environments)
     */
    var forIn = function(collection, callback, thisArg) {
      var index, iterable = collection, result = iterable;
      if (!iterable) return result;
      if (!objectTypes[typeof iterable]) return result;
      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
        for (index in iterable) {
          if (callback(iterable[index], index, collection) === false) return result;
        }
      return result
    };

    /**
     * This method is like `_.forIn` except that it iterates over elements
     * of a `collection` in the opposite order.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * Shape.prototype.move = function(x, y) {
     *   this.x += x;
     *   this.y += y;
     * };
     *
     * _.forInRight(new Shape, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'move', 'y', and 'x' assuming `_.forIn ` logs 'x', 'y', and 'move'
     */
    function forInRight(object, callback, thisArg) {
      var pairs = [];

      forIn(object, function(value, key) {
        pairs.push(key, value);
      });

      var length = pairs.length;
      callback = baseCreateCallback(callback, thisArg, 3);
      while (length--) {
        if (callback(pairs[length--], pairs[length], object) === false) {
          break;
        }
      }
      return object;
    }

    /**
     * Iterates over own enumerable properties of an object, executing the callback
     * for each property. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, key, object). Callbacks may exit iteration early by
     * explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
     *   console.log(key);
     * });
     * // => logs '0', '1', and 'length' (property order is not guaranteed across environments)
     */
    var forOwn = function(collection, callback, thisArg) {
      var index, iterable = collection, result = iterable;
      if (!iterable) return result;
      if (!objectTypes[typeof iterable]) return result;
      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          if (callback(iterable[index], index, collection) === false) return result;
        }
      return result
    };

    /**
     * This method is like `_.forOwn` except that it iterates over elements
     * of a `collection` in the opposite order.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.forOwnRight({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
     *   console.log(key);
     * });
     * // => logs 'length', '1', and '0' assuming `_.forOwn` logs '0', '1', and 'length'
     */
    function forOwnRight(object, callback, thisArg) {
      var props = keys(object),
          length = props.length;

      callback = baseCreateCallback(callback, thisArg, 3);
      while (length--) {
        var key = props[length];
        if (callback(object[key], key, object) === false) {
          break;
        }
      }
      return object;
    }

    /**
     * Creates a sorted array of property names of all enumerable properties,
     * own and inherited, of `object` that have function values.
     *
     * @static
     * @memberOf _
     * @alias methods
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property names that have function values.
     * @example
     *
     * _.functions(_);
     * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
     */
    function functions(object) {
      var result = [];
      forIn(object, function(value, key) {
        if (isFunction(value)) {
          result.push(key);
        }
      });
      return result.sort();
    }

    /**
     * Checks if the specified property name exists as a direct property of `object`,
     * instead of an inherited property.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @param {string} key The name of the property to check.
     * @returns {boolean} Returns `true` if key is a direct property, else `false`.
     * @example
     *
     * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
     * // => true
     */
    function has(object, key) {
      return object ? hasOwnProperty.call(object, key) : false;
    }

    /**
     * Creates an object composed of the inverted keys and values of the given object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to invert.
     * @returns {Object} Returns the created inverted object.
     * @example
     *
     * _.invert({ 'first': 'fred', 'second': 'barney' });
     * // => { 'fred': 'first', 'barney': 'second' }
     */
    function invert(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = {};

      while (++index < length) {
        var key = props[index];
        result[object[key]] = key;
      }
      return result;
    }

    /**
     * Checks if `value` is a boolean value.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a boolean value, else `false`.
     * @example
     *
     * _.isBoolean(null);
     * // => false
     */
    function isBoolean(value) {
      return value === true || value === false ||
        value && typeof value == 'object' && toString.call(value) == boolClass || false;
    }

    /**
     * Checks if `value` is a date.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a date, else `false`.
     * @example
     *
     * _.isDate(new Date);
     * // => true
     */
    function isDate(value) {
      return value && typeof value == 'object' && toString.call(value) == dateClass || false;
    }

    /**
     * Checks if `value` is a DOM element.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a DOM element, else `false`.
     * @example
     *
     * _.isElement(document.body);
     * // => true
     */
    function isElement(value) {
      return value && value.nodeType === 1 || false;
    }

    /**
     * Checks if `value` is empty. Arrays, strings, or `arguments` objects with a
     * length of `0` and objects with no own enumerable properties are considered
     * "empty".
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Array|Object|string} value The value to inspect.
     * @returns {boolean} Returns `true` if the `value` is empty, else `false`.
     * @example
     *
     * _.isEmpty([1, 2, 3]);
     * // => false
     *
     * _.isEmpty({});
     * // => true
     *
     * _.isEmpty('');
     * // => true
     */
    function isEmpty(value) {
      var result = true;
      if (!value) {
        return result;
      }
      var className = toString.call(value),
          length = value.length;

      if ((className == arrayClass || className == stringClass || className == argsClass ) ||
          (className == objectClass && typeof length == 'number' && isFunction(value.splice))) {
        return !length;
      }
      forOwn(value, function() {
        return (result = false);
      });
      return result;
    }

    /**
     * Performs a deep comparison between two values to determine if they are
     * equivalent to each other. If a callback is provided it will be executed
     * to compare values. If the callback returns `undefined` comparisons will
     * be handled by the method instead. The callback is bound to `thisArg` and
     * invoked with two arguments; (a, b).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} a The value to compare.
     * @param {*} b The other value to compare.
     * @param {Function} [callback] The function to customize comparing values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * var object = { 'name': 'fred' };
     * var copy = { 'name': 'fred' };
     *
     * object == copy;
     * // => false
     *
     * _.isEqual(object, copy);
     * // => true
     *
     * var words = ['hello', 'goodbye'];
     * var otherWords = ['hi', 'goodbye'];
     *
     * _.isEqual(words, otherWords, function(a, b) {
     *   var reGreet = /^(?:hello|hi)$/i,
     *       aGreet = _.isString(a) && reGreet.test(a),
     *       bGreet = _.isString(b) && reGreet.test(b);
     *
     *   return (aGreet || bGreet) ? (aGreet == bGreet) : undefined;
     * });
     * // => true
     */
    function isEqual(a, b, callback, thisArg) {
      return baseIsEqual(a, b, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 2));
    }

    /**
     * Checks if `value` is, or can be coerced to, a finite number.
     *
     * Note: This is not the same as native `isFinite` which will return true for
     * booleans and empty strings. See http://es5.github.io/#x15.1.2.5.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is finite, else `false`.
     * @example
     *
     * _.isFinite(-101);
     * // => true
     *
     * _.isFinite('10');
     * // => true
     *
     * _.isFinite(true);
     * // => false
     *
     * _.isFinite('');
     * // => false
     *
     * _.isFinite(Infinity);
     * // => false
     */
    function isFinite(value) {
      return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value));
    }

    /**
     * Checks if `value` is a function.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a function, else `false`.
     * @example
     *
     * _.isFunction(_);
     * // => true
     */
    function isFunction(value) {
      return typeof value == 'function';
    }

    /**
     * Checks if `value` is the language type of Object.
     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is an object, else `false`.
     * @example
     *
     * _.isObject({});
     * // => true
     *
     * _.isObject([1, 2, 3]);
     * // => true
     *
     * _.isObject(1);
     * // => false
     */
    function isObject(value) {
      // check if the value is the ECMAScript language type of Object
      // http://es5.github.io/#x8
      // and avoid a V8 bug
      // http://code.google.com/p/v8/issues/detail?id=2291
      return !!(value && objectTypes[typeof value]);
    }

    /**
     * Checks if `value` is `NaN`.
     *
     * Note: This is not the same as native `isNaN` which will return `true` for
     * `undefined` and other non-numeric values. See http://es5.github.io/#x15.1.2.4.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is `NaN`, else `false`.
     * @example
     *
     * _.isNaN(NaN);
     * // => true
     *
     * _.isNaN(new Number(NaN));
     * // => true
     *
     * isNaN(undefined);
     * // => true
     *
     * _.isNaN(undefined);
     * // => false
     */
    function isNaN(value) {
      // `NaN` as a primitive is the only value that is not equal to itself
      // (perform the [[Class]] check first to avoid errors with some host objects in IE)
      return isNumber(value) && value != +value;
    }

    /**
     * Checks if `value` is `null`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is `null`, else `false`.
     * @example
     *
     * _.isNull(null);
     * // => true
     *
     * _.isNull(undefined);
     * // => false
     */
    function isNull(value) {
      return value === null;
    }

    /**
     * Checks if `value` is a number.
     *
     * Note: `NaN` is considered a number. See http://es5.github.io/#x8.5.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a number, else `false`.
     * @example
     *
     * _.isNumber(8.4 * 5);
     * // => true
     */
    function isNumber(value) {
      return typeof value == 'number' ||
        value && typeof value == 'object' && toString.call(value) == numberClass || false;
    }

    /**
     * Checks if `value` is an object created by the `Object` constructor.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * _.isPlainObject(new Shape);
     * // => false
     *
     * _.isPlainObject([1, 2, 3]);
     * // => false
     *
     * _.isPlainObject({ 'x': 0, 'y': 0 });
     * // => true
     */
    var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
      if (!(value && toString.call(value) == objectClass)) {
        return false;
      }
      var valueOf = value.valueOf,
          objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);

      return objProto
        ? (value == objProto || getPrototypeOf(value) == objProto)
        : shimIsPlainObject(value);
    };

    /**
     * Checks if `value` is a regular expression.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a regular expression, else `false`.
     * @example
     *
     * _.isRegExp(/fred/);
     * // => true
     */
    function isRegExp(value) {
      return value && typeof value == 'object' && toString.call(value) == regexpClass || false;
    }

    /**
     * Checks if `value` is a string.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a string, else `false`.
     * @example
     *
     * _.isString('fred');
     * // => true
     */
    function isString(value) {
      return typeof value == 'string' ||
        value && typeof value == 'object' && toString.call(value) == stringClass || false;
    }

    /**
     * Checks if `value` is `undefined`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is `undefined`, else `false`.
     * @example
     *
     * _.isUndefined(void 0);
     * // => true
     */
    function isUndefined(value) {
      return typeof value == 'undefined';
    }

    /**
     * Creates an object with the same keys as `object` and values generated by
     * running each own enumerable property of `object` through the callback.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, key, object).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new object with values of the results of each `callback` execution.
     * @example
     *
     * _.mapValues({ 'a': 1, 'b': 2, 'c': 3} , function(num) { return num * 3; });
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     *
     * var characters = {
     *   'fred': { 'name': 'fred', 'age': 40 },
     *   'pebbles': { 'name': 'pebbles', 'age': 1 }
     * };
     *
     * // using "_.pluck" callback shorthand
     * _.mapValues(characters, 'age');
     * // => { 'fred': 40, 'pebbles': 1 }
     */
    function mapValues(object, callback, thisArg) {
      var result = {};
      callback = lodash.createCallback(callback, thisArg, 3);

      forOwn(object, function(value, key, object) {
        result[key] = callback(value, key, object);
      });
      return result;
    }

    /**
     * Recursively merges own enumerable properties of the source object(s), that
     * don't resolve to `undefined` into the destination object. Subsequent sources
     * will overwrite property assignments of previous sources. If a callback is
     * provided it will be executed to produce the merged values of the destination
     * and source properties. If the callback returns `undefined` merging will
     * be handled by the method instead. The callback is bound to `thisArg` and
     * invoked with two arguments; (objectValue, sourceValue).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The destination object.
     * @param {...Object} [source] The source objects.
     * @param {Function} [callback] The function to customize merging properties.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * var names = {
     *   'characters': [
     *     { 'name': 'barney' },
     *     { 'name': 'fred' }
     *   ]
     * };
     *
     * var ages = {
     *   'characters': [
     *     { 'age': 36 },
     *     { 'age': 40 }
     *   ]
     * };
     *
     * _.merge(names, ages);
     * // => { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] }
     *
     * var food = {
     *   'fruits': ['apple'],
     *   'vegetables': ['beet']
     * };
     *
     * var otherFood = {
     *   'fruits': ['banana'],
     *   'vegetables': ['carrot']
     * };
     *
     * _.merge(food, otherFood, function(a, b) {
     *   return _.isArray(a) ? a.concat(b) : undefined;
     * });
     * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] }
     */
    function merge(object) {
      var args = arguments,
          length = 2;

      if (!isObject(object)) {
        return object;
      }
      // allows working with `_.reduce` and `_.reduceRight` without using
      // their `index` and `collection` arguments
      if (typeof args[2] != 'number') {
        length = args.length;
      }
      if (length > 3 && typeof args[length - 2] == 'function') {
        var callback = baseCreateCallback(args[--length - 1], args[length--], 2);
      } else if (length > 2 && typeof args[length - 1] == 'function') {
        callback = args[--length];
      }
      var sources = slice(arguments, 1, length),
          index = -1,
          stackA = getArray(),
          stackB = getArray();

      while (++index < length) {
        baseMerge(object, sources[index], callback, stackA, stackB);
      }
      releaseArray(stackA);
      releaseArray(stackB);
      return object;
    }

    /**
     * Creates a shallow clone of `object` excluding the specified properties.
     * Property names may be specified as individual arguments or as arrays of
     * property names. If a callback is provided it will be executed for each
     * property of `object` omitting the properties the callback returns truey
     * for. The callback is bound to `thisArg` and invoked with three arguments;
     * (value, key, object).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The source object.
     * @param {Function|...string|string[]} [callback] The properties to omit or the
     *  function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns an object without the omitted properties.
     * @example
     *
     * _.omit({ 'name': 'fred', 'age': 40 }, 'age');
     * // => { 'name': 'fred' }
     *
     * _.omit({ 'name': 'fred', 'age': 40 }, function(value) {
     *   return typeof value == 'number';
     * });
     * // => { 'name': 'fred' }
     */
    function omit(object, callback, thisArg) {
      var result = {};
      if (typeof callback != 'function') {
        var props = [];
        forIn(object, function(value, key) {
          props.push(key);
        });
        props = baseDifference(props, baseFlatten(arguments, true, false, 1));

        var index = -1,
            length = props.length;

        while (++index < length) {
          var key = props[index];
          result[key] = object[key];
        }
      } else {
        callback = lodash.createCallback(callback, thisArg, 3);
        forIn(object, function(value, key, object) {
          if (!callback(value, key, object)) {
            result[key] = value;
          }
        });
      }
      return result;
    }

    /**
     * Creates a two dimensional array of an object's key-value pairs,
     * i.e. `[[key1, value1], [key2, value2]]`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns new array of key-value pairs.
     * @example
     *
     * _.pairs({ 'barney': 36, 'fred': 40 });
     * // => [['barney', 36], ['fred', 40]] (property order is not guaranteed across environments)
     */
    function pairs(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = Array(length);

      while (++index < length) {
        var key = props[index];
        result[index] = [key, object[key]];
      }
      return result;
    }

    /**
     * Creates a shallow clone of `object` composed of the specified properties.
     * Property names may be specified as individual arguments or as arrays of
     * property names. If a callback is provided it will be executed for each
     * property of `object` picking the properties the callback returns truey
     * for. The callback is bound to `thisArg` and invoked with three arguments;
     * (value, key, object).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The source object.
     * @param {Function|...string|string[]} [callback] The function called per
     *  iteration or property names to pick, specified as individual property
     *  names or arrays of property names.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns an object composed of the picked properties.
     * @example
     *
     * _.pick({ 'name': 'fred', '_userid': 'fred1' }, 'name');
     * // => { 'name': 'fred' }
     *
     * _.pick({ 'name': 'fred', '_userid': 'fred1' }, function(value, key) {
     *   return key.charAt(0) != '_';
     * });
     * // => { 'name': 'fred' }
     */
    function pick(object, callback, thisArg) {
      var result = {};
      if (typeof callback != 'function') {
        var index = -1,
            props = baseFlatten(arguments, true, false, 1),
            length = isObject(object) ? props.length : 0;

        while (++index < length) {
          var key = props[index];
          if (key in object) {
            result[key] = object[key];
          }
        }
      } else {
        callback = lodash.createCallback(callback, thisArg, 3);
        forIn(object, function(value, key, object) {
          if (callback(value, key, object)) {
            result[key] = value;
          }
        });
      }
      return result;
    }

    /**
     * An alternative to `_.reduce` this method transforms `object` to a new
     * `accumulator` object which is the result of running each of its own
     * enumerable properties through a callback, with each callback execution
     * potentially mutating the `accumulator` object. The callback is bound to
     * `thisArg` and invoked with four arguments; (accumulator, value, key, object).
     * Callbacks may exit iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Array|Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [accumulator] The custom accumulator value.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * var squares = _.transform([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], function(result, num) {
     *   num *= num;
     *   if (num % 2) {
     *     return result.push(num) < 3;
     *   }
     * });
     * // => [1, 9, 25]
     *
     * var mapped = _.transform({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
     *   result[key] = num * 3;
     * });
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     */
    function transform(object, callback, accumulator, thisArg) {
      var isArr = isArray(object);
      if (accumulator == null) {
        if (isArr) {
          accumulator = [];
        } else {
          var ctor = object && object.constructor,
              proto = ctor && ctor.prototype;

          accumulator = baseCreate(proto);
        }
      }
      if (callback) {
        callback = lodash.createCallback(callback, thisArg, 4);
        (isArr ? forEach : forOwn)(object, function(value, index, object) {
          return callback(accumulator, value, index, object);
        });
      }
      return accumulator;
    }

    /**
     * Creates an array composed of the own enumerable property values of `object`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property values.
     * @example
     *
     * _.values({ 'one': 1, 'two': 2, 'three': 3 });
     * // => [1, 2, 3] (property order is not guaranteed across environments)
     */
    function values(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = Array(length);

      while (++index < length) {
        result[index] = object[props[index]];
      }
      return result;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates an array of elements from the specified indexes, or keys, of the
     * `collection`. Indexes may be specified as individual arguments or as arrays
     * of indexes.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {...(number|number[]|string|string[])} [index] The indexes of `collection`
     *   to retrieve, specified as individual indexes or arrays of indexes.
     * @returns {Array} Returns a new array of elements corresponding to the
     *  provided indexes.
     * @example
     *
     * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]);
     * // => ['a', 'c', 'e']
     *
     * _.at(['fred', 'barney', 'pebbles'], 0, 2);
     * // => ['fred', 'pebbles']
     */
    function at(collection) {
      var args = arguments,
          index = -1,
          props = baseFlatten(args, true, false, 1),
          length = (args[2] && args[2][args[1]] === collection) ? 1 : props.length,
          result = Array(length);

      while(++index < length) {
        result[index] = collection[props[index]];
      }
      return result;
    }

    /**
     * Checks if a given value is present in a collection using strict equality
     * for comparisons, i.e. `===`. If `fromIndex` is negative, it is used as the
     * offset from the end of the collection.
     *
     * @static
     * @memberOf _
     * @alias include
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {*} target The value to check for.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {boolean} Returns `true` if the `target` element is found, else `false`.
     * @example
     *
     * _.contains([1, 2, 3], 1);
     * // => true
     *
     * _.contains([1, 2, 3], 1, 2);
     * // => false
     *
     * _.contains({ 'name': 'fred', 'age': 40 }, 'fred');
     * // => true
     *
     * _.contains('pebbles', 'eb');
     * // => true
     */
    function contains(collection, target, fromIndex) {
      var index = -1,
          indexOf = getIndexOf(),
          length = collection ? collection.length : 0,
          result = false;

      fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0;
      if (isArray(collection)) {
        result = indexOf(collection, target, fromIndex) > -1;
      } else if (typeof length == 'number') {
        result = (isString(collection) ? collection.indexOf(target, fromIndex) : indexOf(collection, target, fromIndex)) > -1;
      } else {
        forOwn(collection, function(value) {
          if (++index >= fromIndex) {
            return !(result = value === target);
          }
        });
      }
      return result;
    }

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` through the callback. The corresponding value
     * of each key is the number of times the key was returned by the callback.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); });
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy(['one', 'two', 'three'], 'length');
     * // => { '3': 2, '5': 1 }
     */
    var countBy = createAggregator(function(result, value, key) {
      (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1);
    });

    /**
     * Checks if the given callback returns truey value for **all** elements of
     * a collection. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias all
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {boolean} Returns `true` if all elements passed the callback check,
     *  else `false`.
     * @example
     *
     * _.every([true, 1, null, 'yes']);
     * // => false
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.every(characters, 'age');
     * // => true
     *
     * // using "_.where" callback shorthand
     * _.every(characters, { 'age': 36 });
     * // => false
     */
    function every(collection, callback, thisArg) {
      var result = true;
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          if (!(result = !!callback(collection[index], index, collection))) {
            break;
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          return (result = !!callback(value, index, collection));
        });
      }
      return result;
    }

    /**
     * Iterates over elements of a collection, returning an array of all elements
     * the callback returns truey for. The callback is bound to `thisArg` and
     * invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias select
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of elements that passed the callback check.
     * @example
     *
     * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
     * // => [2, 4, 6]
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'blocked': false },
     *   { 'name': 'fred',   'age': 40, 'blocked': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.filter(characters, 'blocked');
     * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
     *
     * // using "_.where" callback shorthand
     * _.filter(characters, { 'age': 36 });
     * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
     */
    function filter(collection, callback, thisArg) {
      var result = [];
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          var value = collection[index];
          if (callback(value, index, collection)) {
            result.push(value);
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          if (callback(value, index, collection)) {
            result.push(value);
          }
        });
      }
      return result;
    }

    /**
     * Iterates over elements of a collection, returning the first element that
     * the callback returns truey for. The callback is bound to `thisArg` and
     * invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias detect, findWhere
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the found element, else `undefined`.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36, 'blocked': false },
     *   { 'name': 'fred',    'age': 40, 'blocked': true },
     *   { 'name': 'pebbles', 'age': 1,  'blocked': false }
     * ];
     *
     * _.find(characters, function(chr) {
     *   return chr.age < 40;
     * });
     * // => { 'name': 'barney', 'age': 36, 'blocked': false }
     *
     * // using "_.where" callback shorthand
     * _.find(characters, { 'age': 1 });
     * // =>  { 'name': 'pebbles', 'age': 1, 'blocked': false }
     *
     * // using "_.pluck" callback shorthand
     * _.find(characters, 'blocked');
     * // => { 'name': 'fred', 'age': 40, 'blocked': true }
     */
    function find(collection, callback, thisArg) {
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          var value = collection[index];
          if (callback(value, index, collection)) {
            return value;
          }
        }
      } else {
        var result;
        forOwn(collection, function(value, index, collection) {
          if (callback(value, index, collection)) {
            result = value;
            return false;
          }
        });
        return result;
      }
    }

    /**
     * This method is like `_.find` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the found element, else `undefined`.
     * @example
     *
     * _.findLast([1, 2, 3, 4], function(num) {
     *   return num % 2 == 1;
     * });
     * // => 3
     */
    function findLast(collection, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);
      forEachRight(collection, function(value, index, collection) {
        if (callback(value, index, collection)) {
          result = value;
          return false;
        }
      });
      return result;
    }

    /**
     * Iterates over elements of a collection, executing the callback for each
     * element. The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection). Callbacks may exit iteration early by
     * explicitly returning `false`.
     *
     * Note: As with other "Collections" methods, objects with a `length` property
     * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`
     * may be used for object iteration.
     *
     * @static
     * @memberOf _
     * @alias each
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array|Object|string} Returns `collection`.
     * @example
     *
     * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(',');
     * // => logs each number and returns '1,2,3'
     *
     * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); });
     * // => logs each number and returns the object (property order is not guaranteed across environments)
     */
    function forEach(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0;

      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
      if (typeof length == 'number') {
        while (++index < length) {
          if (callback(collection[index], index, collection) === false) {
            break;
          }
        }
      } else {
        forOwn(collection, callback);
      }
      return collection;
    }

    /**
     * This method is like `_.forEach` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @alias eachRight
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array|Object|string} Returns `collection`.
     * @example
     *
     * _([1, 2, 3]).forEachRight(function(num) { console.log(num); }).join(',');
     * // => logs each number from right to left and returns '3,2,1'
     */
    function forEachRight(collection, callback, thisArg) {
      var length = collection ? collection.length : 0;
      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
      if (typeof length == 'number') {
        while (length--) {
          if (callback(collection[length], length, collection) === false) {
            break;
          }
        }
      } else {
        var props = keys(collection);
        length = props.length;
        forOwn(collection, function(value, key, collection) {
          key = props ? props[--length] : --length;
          return callback(collection[key], key, collection);
        });
      }
      return collection;
    }

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of a collection through the callback. The corresponding value
     * of each key is an array of the elements responsible for generating the key.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); });
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * // using "_.pluck" callback shorthand
     * _.groupBy(['one', 'two', 'three'], 'length');
     * // => { '3': ['one', 'two'], '5': ['three'] }
     */
    var groupBy = createAggregator(function(result, value, key) {
      (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value);
    });

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of the collection through the given callback. The corresponding
     * value of each key is the last element responsible for generating the key.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * var keys = [
     *   { 'dir': 'left', 'code': 97 },
     *   { 'dir': 'right', 'code': 100 }
     * ];
     *
     * _.indexBy(keys, 'dir');
     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
     *
     * _.indexBy(keys, function(key) { return String.fromCharCode(key.code); });
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     *
     * _.indexBy(characters, function(key) { this.fromCharCode(key.code); }, String);
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     */
    var indexBy = createAggregator(function(result, value, key) {
      result[key] = value;
    });

    /**
     * Invokes the method named by `methodName` on each element in the `collection`
     * returning an array of the results of each invoked method. Additional arguments
     * will be provided to each invoked method. If `methodName` is a function it
     * will be invoked for, and `this` bound to, each element in the `collection`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|string} methodName The name of the method to invoke or
     *  the function invoked per iteration.
     * @param {...*} [arg] Arguments to invoke the method with.
     * @returns {Array} Returns a new array of the results of each invoked method.
     * @example
     *
     * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
     * // => [[1, 5, 7], [1, 2, 3]]
     *
     * _.invoke([123, 456], String.prototype.split, '');
     * // => [['1', '2', '3'], ['4', '5', '6']]
     */
    function invoke(collection, methodName) {
      var args = slice(arguments, 2),
          index = -1,
          isFunc = typeof methodName == 'function',
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args);
      });
      return result;
    }

    /**
     * Creates an array of values by running each element in the collection
     * through the callback. The callback is bound to `thisArg` and invoked with
     * three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias collect
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of the results of each `callback` execution.
     * @example
     *
     * _.map([1, 2, 3], function(num) { return num * 3; });
     * // => [3, 6, 9]
     *
     * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
     * // => [3, 6, 9] (property order is not guaranteed across environments)
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.map(characters, 'name');
     * // => ['barney', 'fred']
     */
    function map(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0;

      callback = lodash.createCallback(callback, thisArg, 3);
      if (typeof length == 'number') {
        var result = Array(length);
        while (++index < length) {
          result[index] = callback(collection[index], index, collection);
        }
      } else {
        result = [];
        forOwn(collection, function(value, key, collection) {
          result[++index] = callback(value, key, collection);
        });
      }
      return result;
    }

    /**
     * Retrieves the maximum value of a collection. If the collection is empty or
     * falsey `-Infinity` is returned. If a callback is provided it will be executed
     * for each value in the collection to generate the criterion by which the value
     * is ranked. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the maximum value.
     * @example
     *
     * _.max([4, 2, 8, 6]);
     * // => 8
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * _.max(characters, function(chr) { return chr.age; });
     * // => { 'name': 'fred', 'age': 40 };
     *
     * // using "_.pluck" callback shorthand
     * _.max(characters, 'age');
     * // => { 'name': 'fred', 'age': 40 };
     */
    function max(collection, callback, thisArg) {
      var computed = -Infinity,
          result = computed;

      // allows working with functions like `_.map` without using
      // their `index` argument as a callback
      if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
        callback = null;
      }
      if (callback == null && isArray(collection)) {
        var index = -1,
            length = collection.length;

        while (++index < length) {
          var value = collection[index];
          if (value > result) {
            result = value;
          }
        }
      } else {
        callback = (callback == null && isString(collection))
          ? charAtCallback
          : lodash.createCallback(callback, thisArg, 3);

        forEach(collection, function(value, index, collection) {
          var current = callback(value, index, collection);
          if (current > computed) {
            computed = current;
            result = value;
          }
        });
      }
      return result;
    }

    /**
     * Retrieves the minimum value of a collection. If the collection is empty or
     * falsey `Infinity` is returned. If a callback is provided it will be executed
     * for each value in the collection to generate the criterion by which the value
     * is ranked. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the minimum value.
     * @example
     *
     * _.min([4, 2, 8, 6]);
     * // => 2
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * _.min(characters, function(chr) { return chr.age; });
     * // => { 'name': 'barney', 'age': 36 };
     *
     * // using "_.pluck" callback shorthand
     * _.min(characters, 'age');
     * // => { 'name': 'barney', 'age': 36 };
     */
    function min(collection, callback, thisArg) {
      var computed = Infinity,
          result = computed;

      // allows working with functions like `_.map` without using
      // their `index` argument as a callback
      if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
        callback = null;
      }
      if (callback == null && isArray(collection)) {
        var index = -1,
            length = collection.length;

        while (++index < length) {
          var value = collection[index];
          if (value < result) {
            result = value;
          }
        }
      } else {
        callback = (callback == null && isString(collection))
          ? charAtCallback
          : lodash.createCallback(callback, thisArg, 3);

        forEach(collection, function(value, index, collection) {
          var current = callback(value, index, collection);
          if (current < computed) {
            computed = current;
            result = value;
          }
        });
      }
      return result;
    }

    /**
     * Retrieves the value of a specified property from all elements in the collection.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {string} property The name of the property to pluck.
     * @returns {Array} Returns a new array of property values.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * _.pluck(characters, 'name');
     * // => ['barney', 'fred']
     */
    var pluck = map;

    /**
     * Reduces a collection to a value which is the accumulated result of running
     * each element in the collection through the callback, where each successive
     * callback execution consumes the return value of the previous execution. If
     * `accumulator` is not provided the first element of the collection will be
     * used as the initial `accumulator` value. The callback is bound to `thisArg`
     * and invoked with four arguments; (accumulator, value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @alias foldl, inject
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [accumulator] Initial value of the accumulator.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * var sum = _.reduce([1, 2, 3], function(sum, num) {
     *   return sum + num;
     * });
     * // => 6
     *
     * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
     *   result[key] = num * 3;
     *   return result;
     * }, {});
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     */
    function reduce(collection, callback, accumulator, thisArg) {
      if (!collection) return accumulator;
      var noaccum = arguments.length < 3;
      callback = lodash.createCallback(callback, thisArg, 4);

      var index = -1,
          length = collection.length;

      if (typeof length == 'number') {
        if (noaccum) {
          accumulator = collection[++index];
        }
        while (++index < length) {
          accumulator = callback(accumulator, collection[index], index, collection);
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          accumulator = noaccum
            ? (noaccum = false, value)
            : callback(accumulator, value, index, collection)
        });
      }
      return accumulator;
    }

    /**
     * This method is like `_.reduce` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @alias foldr
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [accumulator] Initial value of the accumulator.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * var list = [[0, 1], [2, 3], [4, 5]];
     * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []);
     * // => [4, 5, 2, 3, 0, 1]
     */
    function reduceRight(collection, callback, accumulator, thisArg) {
      var noaccum = arguments.length < 3;
      callback = lodash.createCallback(callback, thisArg, 4);
      forEachRight(collection, function(value, index, collection) {
        accumulator = noaccum
          ? (noaccum = false, value)
          : callback(accumulator, value, index, collection);
      });
      return accumulator;
    }

    /**
     * The opposite of `_.filter` this method returns the elements of a
     * collection that the callback does **not** return truey for.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of elements that failed the callback check.
     * @example
     *
     * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
     * // => [1, 3, 5]
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'blocked': false },
     *   { 'name': 'fred',   'age': 40, 'blocked': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.reject(characters, 'blocked');
     * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
     *
     * // using "_.where" callback shorthand
     * _.reject(characters, { 'age': 36 });
     * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
     */
    function reject(collection, callback, thisArg) {
      callback = lodash.createCallback(callback, thisArg, 3);
      return filter(collection, function(value, index, collection) {
        return !callback(value, index, collection);
      });
    }

    /**
     * Retrieves a random element or `n` random elements from a collection.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to sample.
     * @param {number} [n] The number of elements to sample.
     * @param- {Object} [guard] Allows working with functions like `_.map`
     *  without using their `index` arguments as `n`.
     * @returns {Array} Returns the random sample(s) of `collection`.
     * @example
     *
     * _.sample([1, 2, 3, 4]);
     * // => 2
     *
     * _.sample([1, 2, 3, 4], 2);
     * // => [3, 1]
     */
    function sample(collection, n, guard) {
      if (collection && typeof collection.length != 'number') {
        collection = values(collection);
      }
      if (n == null || guard) {
        return collection ? collection[baseRandom(0, collection.length - 1)] : undefined;
      }
      var result = shuffle(collection);
      result.length = nativeMin(nativeMax(0, n), result.length);
      return result;
    }

    /**
     * Creates an array of shuffled values, using a version of the Fisher-Yates
     * shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to shuffle.
     * @returns {Array} Returns a new shuffled collection.
     * @example
     *
     * _.shuffle([1, 2, 3, 4, 5, 6]);
     * // => [4, 1, 6, 3, 5, 2]
     */
    function shuffle(collection) {
      var index = -1,
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        var rand = baseRandom(0, ++index);
        result[index] = result[rand];
        result[rand] = value;
      });
      return result;
    }

    /**
     * Gets the size of the `collection` by returning `collection.length` for arrays
     * and array-like objects or the number of own enumerable properties for objects.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to inspect.
     * @returns {number} Returns `collection.length` or number of own enumerable properties.
     * @example
     *
     * _.size([1, 2]);
     * // => 2
     *
     * _.size({ 'one': 1, 'two': 2, 'three': 3 });
     * // => 3
     *
     * _.size('pebbles');
     * // => 7
     */
    function size(collection) {
      var length = collection ? collection.length : 0;
      return typeof length == 'number' ? length : keys(collection).length;
    }

    /**
     * Checks if the callback returns a truey value for **any** element of a
     * collection. The function returns as soon as it finds a passing value and
     * does not iterate over the entire collection. The callback is bound to
     * `thisArg` and invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias any
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {boolean} Returns `true` if any element passed the callback check,
     *  else `false`.
     * @example
     *
     * _.some([null, 0, 'yes', false], Boolean);
     * // => true
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'blocked': false },
     *   { 'name': 'fred',   'age': 40, 'blocked': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.some(characters, 'blocked');
     * // => true
     *
     * // using "_.where" callback shorthand
     * _.some(characters, { 'age': 1 });
     * // => false
     */
    function some(collection, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          if ((result = callback(collection[index], index, collection))) {
            break;
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          return !(result = callback(value, index, collection));
        });
      }
      return !!result;
    }

    /**
     * Creates an array of elements, sorted in ascending order by the results of
     * running each element in a collection through the callback. This method
     * performs a stable sort, that is, it will preserve the original sort order
     * of equal elements. The callback is bound to `thisArg` and invoked with
     * three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an array of property names is provided for `callback` the collection
     * will be sorted by each property value.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Array|Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of sorted elements.
     * @example
     *
     * _.sortBy([1, 2, 3], function(num) { return Math.sin(num); });
     * // => [3, 1, 2]
     *
     * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math);
     * // => [3, 1, 2]
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36 },
     *   { 'name': 'fred',    'age': 40 },
     *   { 'name': 'barney',  'age': 26 },
     *   { 'name': 'fred',    'age': 30 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.map(_.sortBy(characters, 'age'), _.values);
     * // => [['barney', 26], ['fred', 30], ['barney', 36], ['fred', 40]]
     *
     * // sorting by multiple properties
     * _.map(_.sortBy(characters, ['name', 'age']), _.values);
     * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
     */
    function sortBy(collection, callback, thisArg) {
      var index = -1,
          isArr = isArray(callback),
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      if (!isArr) {
        callback = lodash.createCallback(callback, thisArg, 3);
      }
      forEach(collection, function(value, key, collection) {
        var object = result[++index] = getObject();
        if (isArr) {
          object.criteria = map(callback, function(key) { return value[key]; });
        } else {
          (object.criteria = getArray())[0] = callback(value, key, collection);
        }
        object.index = index;
        object.value = value;
      });

      length = result.length;
      result.sort(compareAscending);
      while (length--) {
        var object = result[length];
        result[length] = object.value;
        if (!isArr) {
          releaseArray(object.criteria);
        }
        releaseObject(object);
      }
      return result;
    }

    /**
     * Converts the `collection` to an array.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to convert.
     * @returns {Array} Returns the new converted array.
     * @example
     *
     * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
     * // => [2, 3, 4]
     */
    function toArray(collection) {
      if (collection && typeof collection.length == 'number') {
        return slice(collection);
      }
      return values(collection);
    }

    /**
     * Performs a deep comparison of each element in a `collection` to the given
     * `properties` object, returning an array of all elements that have equivalent
     * property values.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Object} props The object of property values to filter by.
     * @returns {Array} Returns a new array of elements that have the given properties.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] },
     *   { 'name': 'fred',   'age': 40, 'pets': ['baby puss', 'dino'] }
     * ];
     *
     * _.where(characters, { 'age': 36 });
     * // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }]
     *
     * _.where(characters, { 'pets': ['dino'] });
     * // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }]
     */
    var where = filter;

    /*--------------------------------------------------------------------------*/

    /**
     * Creates an array with all falsey values removed. The values `false`, `null`,
     * `0`, `""`, `undefined`, and `NaN` are all falsey.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to compact.
     * @returns {Array} Returns a new array of filtered values.
     * @example
     *
     * _.compact([0, 1, false, 2, '', 3]);
     * // => [1, 2, 3]
     */
    function compact(array) {
      var index = -1,
          length = array ? array.length : 0,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (value) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * Creates an array excluding all values of the provided arrays using strict
     * equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to process.
     * @param {...Array} [values] The arrays of values to exclude.
     * @returns {Array} Returns a new array of filtered values.
     * @example
     *
     * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
     * // => [1, 3, 4]
     */
    function difference(array) {
      return baseDifference(array, baseFlatten(arguments, true, true, 1));
    }

    /**
     * This method is like `_.find` except that it returns the index of the first
     * element that passes the callback check, instead of the element itself.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36, 'blocked': false },
     *   { 'name': 'fred',    'age': 40, 'blocked': true },
     *   { 'name': 'pebbles', 'age': 1,  'blocked': false }
     * ];
     *
     * _.findIndex(characters, function(chr) {
     *   return chr.age < 20;
     * });
     * // => 2
     *
     * // using "_.where" callback shorthand
     * _.findIndex(characters, { 'age': 36 });
     * // => 0
     *
     * // using "_.pluck" callback shorthand
     * _.findIndex(characters, 'blocked');
     * // => 1
     */
    function findIndex(array, callback, thisArg) {
      var index = -1,
          length = array ? array.length : 0;

      callback = lodash.createCallback(callback, thisArg, 3);
      while (++index < length) {
        if (callback(array[index], index, array)) {
          return index;
        }
      }
      return -1;
    }

    /**
     * This method is like `_.findIndex` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36, 'blocked': true },
     *   { 'name': 'fred',    'age': 40, 'blocked': false },
     *   { 'name': 'pebbles', 'age': 1,  'blocked': true }
     * ];
     *
     * _.findLastIndex(characters, function(chr) {
     *   return chr.age > 30;
     * });
     * // => 1
     *
     * // using "_.where" callback shorthand
     * _.findLastIndex(characters, { 'age': 36 });
     * // => 0
     *
     * // using "_.pluck" callback shorthand
     * _.findLastIndex(characters, 'blocked');
     * // => 2
     */
    function findLastIndex(array, callback, thisArg) {
      var length = array ? array.length : 0;
      callback = lodash.createCallback(callback, thisArg, 3);
      while (length--) {
        if (callback(array[length], length, array)) {
          return length;
        }
      }
      return -1;
    }

    /**
     * Gets the first element or first `n` elements of an array. If a callback
     * is provided elements at the beginning of the array are returned as long
     * as the callback returns truey. The callback is bound to `thisArg` and
     * invoked with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias head, take
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback] The function called
     *  per element or the number of elements to return. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the first element(s) of `array`.
     * @example
     *
     * _.first([1, 2, 3]);
     * // => 1
     *
     * _.first([1, 2, 3], 2);
     * // => [1, 2]
     *
     * _.first([1, 2, 3], function(num) {
     *   return num < 3;
     * });
     * // => [1, 2]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': true,  'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': false, 'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.first(characters, 'blocked');
     * // => [{ 'name': 'barney', 'blocked': true, 'employer': 'slate' }]
     *
     * // using "_.where" callback shorthand
     * _.pluck(_.first(characters, { 'employer': 'slate' }), 'name');
     * // => ['barney', 'fred']
     */
    function first(array, callback, thisArg) {
      var n = 0,
          length = array ? array.length : 0;

      if (typeof callback != 'number' && callback != null) {
        var index = -1;
        callback = lodash.createCallback(callback, thisArg, 3);
        while (++index < length && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = callback;
        if (n == null || thisArg) {
          return array ? array[0] : undefined;
        }
      }
      return slice(array, 0, nativeMin(nativeMax(0, n), length));
    }

    /**
     * Flattens a nested array (the nesting can be to any depth). If `isShallow`
     * is truey, the array will only be flattened a single level. If a callback
     * is provided each element of the array is passed through the callback before
     * flattening. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to flatten.
     * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new flattened array.
     * @example
     *
     * _.flatten([1, [2], [3, [[4]]]]);
     * // => [1, 2, 3, 4];
     *
     * _.flatten([1, [2], [3, [[4]]]], true);
     * // => [1, 2, 3, [[4]]];
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 30, 'pets': ['hoppy'] },
     *   { 'name': 'fred',   'age': 40, 'pets': ['baby puss', 'dino'] }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.flatten(characters, 'pets');
     * // => ['hoppy', 'baby puss', 'dino']
     */
    function flatten(array, isShallow, callback, thisArg) {
      // juggle arguments
      if (typeof isShallow != 'boolean' && isShallow != null) {
        thisArg = callback;
        callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow;
        isShallow = false;
      }
      if (callback != null) {
        array = map(array, callback, thisArg);
      }
      return baseFlatten(array, isShallow);
    }

    /**
     * Gets the index at which the first occurrence of `value` is found using
     * strict equality for comparisons, i.e. `===`. If the array is already sorted
     * providing `true` for `fromIndex` will run a faster binary search.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {*} value The value to search for.
     * @param {boolean|number} [fromIndex=0] The index to search from or `true`
     *  to perform a binary search on a sorted array.
     * @returns {number} Returns the index of the matched value or `-1`.
     * @example
     *
     * _.indexOf([1, 2, 3, 1, 2, 3], 2);
     * // => 1
     *
     * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
     * // => 4
     *
     * _.indexOf([1, 1, 2, 2, 3, 3], 2, true);
     * // => 2
     */
    function indexOf(array, value, fromIndex) {
      if (typeof fromIndex == 'number') {
        var length = array ? array.length : 0;
        fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0);
      } else if (fromIndex) {
        var index = sortedIndex(array, value);
        return array[index] === value ? index : -1;
      }
      return baseIndexOf(array, value, fromIndex);
    }

    /**
     * Gets all but the last element or last `n` elements of an array. If a
     * callback is provided elements at the end of the array are excluded from
     * the result as long as the callback returns truey. The callback is bound
     * to `thisArg` and invoked with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback=1] The function called
     *  per element or the number of elements to exclude. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a slice of `array`.
     * @example
     *
     * _.initial([1, 2, 3]);
     * // => [1, 2]
     *
     * _.initial([1, 2, 3], 2);
     * // => [1]
     *
     * _.initial([1, 2, 3], function(num) {
     *   return num > 1;
     * });
     * // => [1]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': false, 'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': true,  'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.initial(characters, 'blocked');
     * // => [{ 'name': 'barney',  'blocked': false, 'employer': 'slate' }]
     *
     * // using "_.where" callback shorthand
     * _.pluck(_.initial(characters, { 'employer': 'na' }), 'name');
     * // => ['barney', 'fred']
     */
    function initial(array, callback, thisArg) {
      var n = 0,
          length = array ? array.length : 0;

      if (typeof callback != 'number' && callback != null) {
        var index = length;
        callback = lodash.createCallback(callback, thisArg, 3);
        while (index-- && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = (callback == null || thisArg) ? 1 : callback || n;
      }
      return slice(array, 0, nativeMin(nativeMax(0, length - n), length));
    }

    /**
     * Creates an array of unique values present in all provided arrays using
     * strict equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {...Array} [array] The arrays to inspect.
     * @returns {Array} Returns an array of shared values.
     * @example
     *
     * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
     * // => [1, 2]
     */
    function intersection() {
      var args = [],
          argsIndex = -1,
          argsLength = arguments.length,
          caches = getArray(),
          indexOf = getIndexOf(),
          trustIndexOf = indexOf === baseIndexOf,
          seen = getArray();

      while (++argsIndex < argsLength) {
        var value = arguments[argsIndex];
        if (isArray(value) || isArguments(value)) {
          args.push(value);
          caches.push(trustIndexOf && value.length >= largeArraySize &&
            createCache(argsIndex ? args[argsIndex] : seen));
        }
      }
      var array = args[0],
          index = -1,
          length = array ? array.length : 0,
          result = [];

      outer:
      while (++index < length) {
        var cache = caches[0];
        value = array[index];

        if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) {
          argsIndex = argsLength;
          (cache || seen).push(value);
          while (--argsIndex) {
            cache = caches[argsIndex];
            if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
              continue outer;
            }
          }
          result.push(value);
        }
      }
      while (argsLength--) {
        cache = caches[argsLength];
        if (cache) {
          releaseObject(cache);
        }
      }
      releaseArray(caches);
      releaseArray(seen);
      return result;
    }

    /**
     * Gets the last element or last `n` elements of an array. If a callback is
     * provided elements at the end of the array are returned as long as the
     * callback returns truey. The callback is bound to `thisArg` and invoked
     * with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback] The function called
     *  per element or the number of elements to return. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the last element(s) of `array`.
     * @example
     *
     * _.last([1, 2, 3]);
     * // => 3
     *
     * _.last([1, 2, 3], 2);
     * // => [2, 3]
     *
     * _.last([1, 2, 3], function(num) {
     *   return num > 1;
     * });
     * // => [2, 3]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': false, 'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': true,  'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.pluck(_.last(characters, 'blocked'), 'name');
     * // => ['fred', 'pebbles']
     *
     * // using "_.where" callback shorthand
     * _.last(characters, { 'employer': 'na' });
     * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
     */
    function last(array, callback, thisArg) {
      var n = 0,
          length = array ? array.length : 0;

      if (typeof callback != 'number' && callback != null) {
        var index = length;
        callback = lodash.createCallback(callback, thisArg, 3);
        while (index-- && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = callback;
        if (n == null || thisArg) {
          return array ? array[length - 1] : undefined;
        }
      }
      return slice(array, nativeMax(0, length - n));
    }

    /**
     * Gets the index at which the last occurrence of `value` is found using strict
     * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used
     * as the offset from the end of the collection.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=array.length-1] The index to search from.
     * @returns {number} Returns the index of the matched value or `-1`.
     * @example
     *
     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
     * // => 4
     *
     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
     * // => 1
     */
    function lastIndexOf(array, value, fromIndex) {
      var index = array ? array.length : 0;
      if (typeof fromIndex == 'number') {
        index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1;
      }
      while (index--) {
        if (array[index] === value) {
          return index;
        }
      }
      return -1;
    }

    /**
     * Removes all provided values from the given array using strict equality for
     * comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to modify.
     * @param {...*} [value] The values to remove.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3, 1, 2, 3];
     * _.pull(array, 2, 3);
     * console.log(array);
     * // => [1, 1]
     */
    function pull(array) {
      var args = arguments,
          argsIndex = 0,
          argsLength = args.length,
          length = array ? array.length : 0;

      while (++argsIndex < argsLength) {
        var index = -1,
            value = args[argsIndex];
        while (++index < length) {
          if (array[index] === value) {
            splice.call(array, index--, 1);
            length--;
          }
        }
      }
      return array;
    }

    /**
     * Creates an array of numbers (positive and/or negative) progressing from
     * `start` up to but not including `end`. If `start` is less than `stop` a
     * zero-length range is created unless a negative `step` is specified.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @param {number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns a new range array.
     * @example
     *
     * _.range(4);
     * // => [0, 1, 2, 3]
     *
     * _.range(1, 5);
     * // => [1, 2, 3, 4]
     *
     * _.range(0, 20, 5);
     * // => [0, 5, 10, 15]
     *
     * _.range(0, -4, -1);
     * // => [0, -1, -2, -3]
     *
     * _.range(1, 4, 0);
     * // => [1, 1, 1]
     *
     * _.range(0);
     * // => []
     */
    function range(start, end, step) {
      start = +start || 0;
      step = typeof step == 'number' ? step : (+step || 1);

      if (end == null) {
        end = start;
        start = 0;
      }
      // use `Array(length)` so engines like Chakra and V8 avoid slower modes
      // http://youtu.be/XAqIpGU8ZZk#t=17m25s
      var index = -1,
          length = nativeMax(0, ceil((end - start) / (step || 1))),
          result = Array(length);

      while (++index < length) {
        result[index] = start;
        start += step;
      }
      return result;
    }

    /**
     * Removes all elements from an array that the callback returns truey for
     * and returns an array of removed elements. The callback is bound to `thisArg`
     * and invoked with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to modify.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of removed elements.
     * @example
     *
     * var array = [1, 2, 3, 4, 5, 6];
     * var evens = _.remove(array, function(num) { return num % 2 == 0; });
     *
     * console.log(array);
     * // => [1, 3, 5]
     *
     * console.log(evens);
     * // => [2, 4, 6]
     */
    function remove(array, callback, thisArg) {
      var index = -1,
          length = array ? array.length : 0,
          result = [];

      callback = lodash.createCallback(callback, thisArg, 3);
      while (++index < length) {
        var value = array[index];
        if (callback(value, index, array)) {
          result.push(value);
          splice.call(array, index--, 1);
          length--;
        }
      }
      return result;
    }

    /**
     * The opposite of `_.initial` this method gets all but the first element or
     * first `n` elements of an array. If a callback function is provided elements
     * at the beginning of the array are excluded from the result as long as the
     * callback returns truey. The callback is bound to `thisArg` and invoked
     * with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias drop, tail
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback=1] The function called
     *  per element or the number of elements to exclude. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a slice of `array`.
     * @example
     *
     * _.rest([1, 2, 3]);
     * // => [2, 3]
     *
     * _.rest([1, 2, 3], 2);
     * // => [3]
     *
     * _.rest([1, 2, 3], function(num) {
     *   return num < 3;
     * });
     * // => [3]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': true,  'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': false,  'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true, 'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.pluck(_.rest(characters, 'blocked'), 'name');
     * // => ['fred', 'pebbles']
     *
     * // using "_.where" callback shorthand
     * _.rest(characters, { 'employer': 'slate' });
     * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
     */
    function rest(array, callback, thisArg) {
      if (typeof callback != 'number' && callback != null) {
        var n = 0,
            index = -1,
            length = array ? array.length : 0;

        callback = lodash.createCallback(callback, thisArg, 3);
        while (++index < length && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = (callback == null || thisArg) ? 1 : nativeMax(0, callback);
      }
      return slice(array, n);
    }

    /**
     * Uses a binary search to determine the smallest index at which a value
     * should be inserted into a given sorted array in order to maintain the sort
     * order of the array. If a callback is provided it will be executed for
     * `value` and each element of `array` to compute their sort ranking. The
     * callback is bound to `thisArg` and invoked with one argument; (value).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedIndex([20, 30, 50], 40);
     * // => 2
     *
     * // using "_.pluck" callback shorthand
     * _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
     * // => 2
     *
     * var dict = {
     *   'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 }
     * };
     *
     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
     *   return dict.wordToNumber[word];
     * });
     * // => 2
     *
     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
     *   return this.wordToNumber[word];
     * }, dict);
     * // => 2
     */
    function sortedIndex(array, value, callback, thisArg) {
      var low = 0,
          high = array ? array.length : low;

      // explicitly reference `identity` for better inlining in Firefox
      callback = callback ? lodash.createCallback(callback, thisArg, 1) : identity;
      value = callback(value);

      while (low < high) {
        var mid = (low + high) >>> 1;
        (callback(array[mid]) < value)
          ? low = mid + 1
          : high = mid;
      }
      return low;
    }

    /**
     * Creates an array of unique values, in order, of the provided arrays using
     * strict equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {...Array} [array] The arrays to inspect.
     * @returns {Array} Returns an array of combined values.
     * @example
     *
     * _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]);
     * // => [1, 2, 3, 5, 4]
     */
    function union() {
      return baseUniq(baseFlatten(arguments, true, true));
    }

    /**
     * Creates a duplicate-value-free version of an array using strict equality
     * for comparisons, i.e. `===`. If the array is sorted, providing
     * `true` for `isSorted` will use a faster algorithm. If a callback is provided
     * each element of `array` is passed through the callback before uniqueness
     * is computed. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias unique
     * @category Arrays
     * @param {Array} array The array to process.
     * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a duplicate-value-free array.
     * @example
     *
     * _.uniq([1, 2, 1, 3, 1]);
     * // => [1, 2, 3]
     *
     * _.uniq([1, 1, 2, 2, 3], true);
     * // => [1, 2, 3]
     *
     * _.uniq(['A', 'b', 'C', 'a', 'B', 'c'], function(letter) { return letter.toLowerCase(); });
     * // => ['A', 'b', 'C']
     *
     * _.uniq([1, 2.5, 3, 1.5, 2, 3.5], function(num) { return this.floor(num); }, Math);
     * // => [1, 2.5, 3]
     *
     * // using "_.pluck" callback shorthand
     * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    function uniq(array, isSorted, callback, thisArg) {
      // juggle arguments
      if (typeof isSorted != 'boolean' && isSorted != null) {
        thisArg = callback;
        callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
        isSorted = false;
      }
      if (callback != null) {
        callback = lodash.createCallback(callback, thisArg, 3);
      }
      return baseUniq(array, isSorted, callback);
    }

    /**
     * Creates an array excluding all provided values using strict equality for
     * comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to filter.
     * @param {...*} [value] The values to exclude.
     * @returns {Array} Returns a new array of filtered values.
     * @example
     *
     * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
     * // => [2, 3, 4]
     */
    function without(array) {
      return baseDifference(array, slice(arguments, 1));
    }

    /**
     * Creates an array that is the symmetric difference of the provided arrays.
     * See http://en.wikipedia.org/wiki/Symmetric_difference.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {...Array} [array] The arrays to inspect.
     * @returns {Array} Returns an array of values.
     * @example
     *
     * _.xor([1, 2, 3], [5, 2, 1, 4]);
     * // => [3, 5, 4]
     *
     * _.xor([1, 2, 5], [2, 3, 5], [3, 4, 5]);
     * // => [1, 4, 5]
     */
    function xor() {
      var index = -1,
          length = arguments.length;

      while (++index < length) {
        var array = arguments[index];
        if (isArray(array) || isArguments(array)) {
          var result = result
            ? baseUniq(baseDifference(result, array).concat(baseDifference(array, result)))
            : array;
        }
      }
      return result || [];
    }

    /**
     * Creates an array of grouped elements, the first of which contains the first
     * elements of the given arrays, the second of which contains the second
     * elements of the given arrays, and so on.
     *
     * @static
     * @memberOf _
     * @alias unzip
     * @category Arrays
     * @param {...Array} [array] Arrays to process.
     * @returns {Array} Returns a new array of grouped elements.
     * @example
     *
     * _.zip(['fred', 'barney'], [30, 40], [true, false]);
     * // => [['fred', 30, true], ['barney', 40, false]]
     */
    function zip() {
      var array = arguments.length > 1 ? arguments : arguments[0],
          index = -1,
          length = array ? max(pluck(array, 'length')) : 0,
          result = Array(length < 0 ? 0 : length);

      while (++index < length) {
        result[index] = pluck(array, index);
      }
      return result;
    }

    /**
     * Creates an object composed from arrays of `keys` and `values`. Provide
     * either a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]`
     * or two arrays, one of `keys` and one of corresponding `values`.
     *
     * @static
     * @memberOf _
     * @alias object
     * @category Arrays
     * @param {Array} keys The array of keys.
     * @param {Array} [values=[]] The array of values.
     * @returns {Object} Returns an object composed of the given keys and
     *  corresponding values.
     * @example
     *
     * _.zipObject(['fred', 'barney'], [30, 40]);
     * // => { 'fred': 30, 'barney': 40 }
     */
    function zipObject(keys, values) {
      var index = -1,
          length = keys ? keys.length : 0,
          result = {};

      if (!values && length && !isArray(keys[0])) {
        values = [];
      }
      while (++index < length) {
        var key = keys[index];
        if (values) {
          result[key] = values[index];
        } else if (key) {
          result[key[0]] = key[1];
        }
      }
      return result;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a function that executes `func`, with  the `this` binding and
     * arguments of the created function, only after being called `n` times.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {number} n The number of times the function must be called before
     *  `func` is executed.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var saves = ['profile', 'settings'];
     *
     * var done = _.after(saves.length, function() {
     *   console.log('Done saving!');
     * });
     *
     * _.forEach(saves, function(type) {
     *   asyncSave({ 'type': type, 'complete': done });
     * });
     * // => logs 'Done saving!', after all saves have completed
     */
    function after(n, func) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      return function() {
        if (--n < 1) {
          return func.apply(this, arguments);
        }
      };
    }

    /**
     * Creates a function that, when called, invokes `func` with the `this`
     * binding of `thisArg` and prepends any additional `bind` arguments to those
     * provided to the bound function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to bind.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var func = function(greeting) {
     *   return greeting + ' ' + this.name;
     * };
     *
     * func = _.bind(func, { 'name': 'fred' }, 'hi');
     * func();
     * // => 'hi fred'
     */
    function bind(func, thisArg) {
      return arguments.length > 2
        ? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
        : createWrapper(func, 1, null, null, thisArg);
    }

    /**
     * Binds methods of an object to the object itself, overwriting the existing
     * method. Method names may be specified as individual arguments or as arrays
     * of method names. If no method names are provided all the function properties
     * of `object` will be bound.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Object} object The object to bind and assign the bound methods to.
     * @param {...string} [methodName] The object method names to
     *  bind, specified as individual method names or arrays of method names.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var view = {
     *   'label': 'docs',
     *   'onClick': function() { console.log('clicked ' + this.label); }
     * };
     *
     * _.bindAll(view);
     * jQuery('#docs').on('click', view.onClick);
     * // => logs 'clicked docs', when the button is clicked
     */
    function bindAll(object) {
      var funcs = arguments.length > 1 ? baseFlatten(arguments, true, false, 1) : functions(object),
          index = -1,
          length = funcs.length;

      while (++index < length) {
        var key = funcs[index];
        object[key] = createWrapper(object[key], 1, null, null, object);
      }
      return object;
    }

    /**
     * Creates a function that, when called, invokes the method at `object[key]`
     * and prepends any additional `bindKey` arguments to those provided to the bound
     * function. This method differs from `_.bind` by allowing bound functions to
     * reference methods that will be redefined or don't yet exist.
     * See http://michaux.ca/articles/lazy-function-definition-pattern.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Object} object The object the method belongs to.
     * @param {string} key The key of the method.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var object = {
     *   'name': 'fred',
     *   'greet': function(greeting) {
     *     return greeting + ' ' + this.name;
     *   }
     * };
     *
     * var func = _.bindKey(object, 'greet', 'hi');
     * func();
     * // => 'hi fred'
     *
     * object.greet = function(greeting) {
     *   return greeting + 'ya ' + this.name + '!';
     * };
     *
     * func();
     * // => 'hiya fred!'
     */
    function bindKey(object, key) {
      return arguments.length > 2
        ? createWrapper(key, 19, slice(arguments, 2), null, object)
        : createWrapper(key, 3, null, null, object);
    }

    /**
     * Creates a function that is the composition of the provided functions,
     * where each function consumes the return value of the function that follows.
     * For example, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`.
     * Each function is executed with the `this` binding of the composed function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {...Function} [func] Functions to compose.
     * @returns {Function} Returns the new composed function.
     * @example
     *
     * var realNameMap = {
     *   'pebbles': 'penelope'
     * };
     *
     * var format = function(name) {
     *   name = realNameMap[name.toLowerCase()] || name;
     *   return name.charAt(0).toUpperCase() + name.slice(1).toLowerCase();
     * };
     *
     * var greet = function(formatted) {
     *   return 'Hiya ' + formatted + '!';
     * };
     *
     * var welcome = _.compose(greet, format);
     * welcome('pebbles');
     * // => 'Hiya Penelope!'
     */
    function compose() {
      var funcs = arguments,
          length = funcs.length;

      while (length--) {
        if (!isFunction(funcs[length])) {
          throw new TypeError;
        }
      }
      return function() {
        var args = arguments,
            length = funcs.length;

        while (length--) {
          args = [funcs[length].apply(this, args)];
        }
        return args[0];
      };
    }

    /**
     * Creates a function which accepts one or more arguments of `func` that when
     * invoked either executes `func` returning its result, if all `func` arguments
     * have been provided, or returns a function that accepts one or more of the
     * remaining `func` arguments, and so on. The arity of `func` can be specified
     * if `func.length` is not sufficient.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var curried = _.curry(function(a, b, c) {
     *   console.log(a + b + c);
     * });
     *
     * curried(1)(2)(3);
     * // => 6
     *
     * curried(1, 2)(3);
     * // => 6
     *
     * curried(1, 2, 3);
     * // => 6
     */
    function curry(func, arity) {
      arity = typeof arity == 'number' ? arity : (+arity || func.length);
      return createWrapper(func, 4, null, null, null, arity);
    }

    /**
     * Creates a function that will delay the execution of `func` until after
     * `wait` milliseconds have elapsed since the last time it was invoked.
     * Provide an options object to indicate that `func` should be invoked on
     * the leading and/or trailing edge of the `wait` timeout. Subsequent calls
     * to the debounced function will return the result of the last `func` call.
     *
     * Note: If `leading` and `trailing` options are `true` `func` will be called
     * on the trailing edge of the timeout only if the the debounced function is
     * invoked more than once during the `wait` timeout.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to debounce.
     * @param {number} wait The number of milliseconds to delay.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.leading=false] Specify execution on the leading edge of the timeout.
     * @param {number} [options.maxWait] The maximum time `func` is allowed to be delayed before it's called.
     * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
     * @returns {Function} Returns the new debounced function.
     * @example
     *
     * // avoid costly calculations while the window size is in flux
     * var lazyLayout = _.debounce(calculateLayout, 150);
     * jQuery(window).on('resize', lazyLayout);
     *
     * // execute `sendMail` when the click event is fired, debouncing subsequent calls
     * jQuery('#postbox').on('click', _.debounce(sendMail, 300, {
     *   'leading': true,
     *   'trailing': false
     * });
     *
     * // ensure `batchLog` is executed once after 1 second of debounced calls
     * var source = new EventSource('/stream');
     * source.addEventListener('message', _.debounce(batchLog, 250, {
     *   'maxWait': 1000
     * }, false);
     */
    function debounce(func, wait, options) {
      var args,
          maxTimeoutId,
          result,
          stamp,
          thisArg,
          timeoutId,
          trailingCall,
          lastCalled = 0,
          maxWait = false,
          trailing = true;

      if (!isFunction(func)) {
        throw new TypeError;
      }
      wait = nativeMax(0, wait) || 0;
      if (options === true) {
        var leading = true;
        trailing = false;
      } else if (isObject(options)) {
        leading = options.leading;
        maxWait = 'maxWait' in options && (nativeMax(wait, options.maxWait) || 0);
        trailing = 'trailing' in options ? options.trailing : trailing;
      }
      var delayed = function() {
        var remaining = wait - (now() - stamp);
        if (remaining <= 0) {
          if (maxTimeoutId) {
            clearTimeout(maxTimeoutId);
          }
          var isCalled = trailingCall;
          maxTimeoutId = timeoutId = trailingCall = undefined;
          if (isCalled) {
            lastCalled = now();
            result = func.apply(thisArg, args);
            if (!timeoutId && !maxTimeoutId) {
              args = thisArg = null;
            }
          }
        } else {
          timeoutId = setTimeout(delayed, remaining);
        }
      };

      var maxDelayed = function() {
        if (timeoutId) {
          clearTimeout(timeoutId);
        }
        maxTimeoutId = timeoutId = trailingCall = undefined;
        if (trailing || (maxWait !== wait)) {
          lastCalled = now();
          result = func.apply(thisArg, args);
          if (!timeoutId && !maxTimeoutId) {
            args = thisArg = null;
          }
        }
      };

      return function() {
        args = arguments;
        stamp = now();
        thisArg = this;
        trailingCall = trailing && (timeoutId || !leading);

        if (maxWait === false) {
          var leadingCall = leading && !timeoutId;
        } else {
          if (!maxTimeoutId && !leading) {
            lastCalled = stamp;
          }
          var remaining = maxWait - (stamp - lastCalled),
              isCalled = remaining <= 0;

          if (isCalled) {
            if (maxTimeoutId) {
              maxTimeoutId = clearTimeout(maxTimeoutId);
            }
            lastCalled = stamp;
            result = func.apply(thisArg, args);
          }
          else if (!maxTimeoutId) {
            maxTimeoutId = setTimeout(maxDelayed, remaining);
          }
        }
        if (isCalled && timeoutId) {
          timeoutId = clearTimeout(timeoutId);
        }
        else if (!timeoutId && wait !== maxWait) {
          timeoutId = setTimeout(delayed, wait);
        }
        if (leadingCall) {
          isCalled = true;
          result = func.apply(thisArg, args);
        }
        if (isCalled && !timeoutId && !maxTimeoutId) {
          args = thisArg = null;
        }
        return result;
      };
    }

    /**
     * Defers executing the `func` function until the current call stack has cleared.
     * Additional arguments will be provided to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to defer.
     * @param {...*} [arg] Arguments to invoke the function with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.defer(function(text) { console.log(text); }, 'deferred');
     * // logs 'deferred' after one or more milliseconds
     */
    function defer(func) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      var args = slice(arguments, 1);
      return setTimeout(function() { func.apply(undefined, args); }, 1);
    }

    /**
     * Executes the `func` function after `wait` milliseconds. Additional arguments
     * will be provided to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay execution.
     * @param {...*} [arg] Arguments to invoke the function with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.delay(function(text) { console.log(text); }, 1000, 'later');
     * // => logs 'later' after one second
     */
    function delay(func, wait) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      var args = slice(arguments, 2);
      return setTimeout(function() { func.apply(undefined, args); }, wait);
    }

    /**
     * Creates a function that memoizes the result of `func`. If `resolver` is
     * provided it will be used to determine the cache key for storing the result
     * based on the arguments provided to the memoized function. By default, the
     * first argument provided to the memoized function is used as the cache key.
     * The `func` is executed with the `this` binding of the memoized function.
     * The result cache is exposed as the `cache` property on the memoized function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to have its output memoized.
     * @param {Function} [resolver] A function used to resolve the cache key.
     * @returns {Function} Returns the new memoizing function.
     * @example
     *
     * var fibonacci = _.memoize(function(n) {
     *   return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
     * });
     *
     * fibonacci(9)
     * // => 34
     *
     * var data = {
     *   'fred': { 'name': 'fred', 'age': 40 },
     *   'pebbles': { 'name': 'pebbles', 'age': 1 }
     * };
     *
     * // modifying the result cache
     * var get = _.memoize(function(name) { return data[name]; }, _.identity);
     * get('pebbles');
     * // => { 'name': 'pebbles', 'age': 1 }
     *
     * get.cache.pebbles.name = 'penelope';
     * get('pebbles');
     * // => { 'name': 'penelope', 'age': 1 }
     */
    function memoize(func, resolver) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      var memoized = function() {
        var cache = memoized.cache,
            key = resolver ? resolver.apply(this, arguments) : keyPrefix + arguments[0];

        return hasOwnProperty.call(cache, key)
          ? cache[key]
          : (cache[key] = func.apply(this, arguments));
      }
      memoized.cache = {};
      return memoized;
    }

    /**
     * Creates a function that is restricted to execute `func` once. Repeat calls to
     * the function will return the value of the first call. The `func` is executed
     * with the `this` binding of the created function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var initialize = _.once(createApplication);
     * initialize();
     * initialize();
     * // `initialize` executes `createApplication` once
     */
    function once(func) {
      var ran,
          result;

      if (!isFunction(func)) {
        throw new TypeError;
      }
      return function() {
        if (ran) {
          return result;
        }
        ran = true;
        result = func.apply(this, arguments);

        // clear the `func` variable so the function may be garbage collected
        func = null;
        return result;
      };
    }

    /**
     * Creates a function that, when called, invokes `func` with any additional
     * `partial` arguments prepended to those provided to the new function. This
     * method is similar to `_.bind` except it does **not** alter the `this` binding.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var greet = function(greeting, name) { return greeting + ' ' + name; };
     * var hi = _.partial(greet, 'hi');
     * hi('fred');
     * // => 'hi fred'
     */
    function partial(func) {
      return createWrapper(func, 16, slice(arguments, 1));
    }

    /**
     * This method is like `_.partial` except that `partial` arguments are
     * appended to those provided to the new function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var defaultsDeep = _.partialRight(_.merge, _.defaults);
     *
     * var options = {
     *   'variable': 'data',
     *   'imports': { 'jq': $ }
     * };
     *
     * defaultsDeep(options, _.templateSettings);
     *
     * options.variable
     * // => 'data'
     *
     * options.imports
     * // => { '_': _, 'jq': $ }
     */
    function partialRight(func) {
      return createWrapper(func, 32, null, slice(arguments, 1));
    }

    /**
     * Creates a function that, when executed, will only call the `func` function
     * at most once per every `wait` milliseconds. Provide an options object to
     * indicate that `func` should be invoked on the leading and/or trailing edge
     * of the `wait` timeout. Subsequent calls to the throttled function will
     * return the result of the last `func` call.
     *
     * Note: If `leading` and `trailing` options are `true` `func` will be called
     * on the trailing edge of the timeout only if the the throttled function is
     * invoked more than once during the `wait` timeout.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to throttle.
     * @param {number} wait The number of milliseconds to throttle executions to.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.leading=true] Specify execution on the leading edge of the timeout.
     * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
     * @returns {Function} Returns the new throttled function.
     * @example
     *
     * // avoid excessively updating the position while scrolling
     * var throttled = _.throttle(updatePosition, 100);
     * jQuery(window).on('scroll', throttled);
     *
     * // execute `renewToken` when the click event is fired, but not more than once every 5 minutes
     * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
     *   'trailing': false
     * }));
     */
    function throttle(func, wait, options) {
      var leading = true,
          trailing = true;

      if (!isFunction(func)) {
        throw new TypeError;
      }
      if (options === false) {
        leading = false;
      } else if (isObject(options)) {
        leading = 'leading' in options ? options.leading : leading;
        trailing = 'trailing' in options ? options.trailing : trailing;
      }
      debounceOptions.leading = leading;
      debounceOptions.maxWait = wait;
      debounceOptions.trailing = trailing;

      return debounce(func, wait, debounceOptions);
    }

    /**
     * Creates a function that provides `value` to the wrapper function as its
     * first argument. Additional arguments provided to the function are appended
     * to those provided to the wrapper function. The wrapper is executed with
     * the `this` binding of the created function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {*} value The value to wrap.
     * @param {Function} wrapper The wrapper function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var p = _.wrap(_.escape, function(func, text) {
     *   return '<p>' + func(text) + '</p>';
     * });
     *
     * p('Fred, Wilma, & Pebbles');
     * // => '<p>Fred, Wilma, &amp; Pebbles</p>'
     */
    function wrap(value, wrapper) {
      return createWrapper(wrapper, 16, [value]);
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a function that returns `value`.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {*} value The value to return from the new function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var object = { 'name': 'fred' };
     * var getter = _.constant(object);
     * getter() === object;
     * // => true
     */
    function constant(value) {
      return function() {
        return value;
      };
    }

    /**
     * Produces a callback bound to an optional `thisArg`. If `func` is a property
     * name the created callback will return the property value for a given element.
     * If `func` is an object the created callback will return `true` for elements
     * that contain the equivalent object properties, otherwise it will return `false`.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {*} [func=identity] The value to convert to a callback.
     * @param {*} [thisArg] The `this` binding of the created callback.
     * @param {number} [argCount] The number of arguments the callback accepts.
     * @returns {Function} Returns a callback function.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // wrap to create custom callback shorthands
     * _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) {
     *   var match = /^(.+?)__([gl]t)(.+)$/.exec(callback);
     *   return !match ? func(callback, thisArg) : function(object) {
     *     return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3];
     *   };
     * });
     *
     * _.filter(characters, 'age__gt38');
     * // => [{ 'name': 'fred', 'age': 40 }]
     */
    function createCallback(func, thisArg, argCount) {
      var type = typeof func;
      if (func == null || type == 'function') {
        return baseCreateCallback(func, thisArg, argCount);
      }
      // handle "_.pluck" style callback shorthands
      if (type != 'object') {
        return property(func);
      }
      var props = keys(func),
          key = props[0],
          a = func[key];

      // handle "_.where" style callback shorthands
      if (props.length == 1 && a === a && !isObject(a)) {
        // fast path the common case of providing an object with a single
        // property containing a primitive value
        return function(object) {
          var b = object[key];
          return a === b && (a !== 0 || (1 / a == 1 / b));
        };
      }
      return function(object) {
        var length = props.length,
            result = false;

        while (length--) {
          if (!(result = baseIsEqual(object[props[length]], func[props[length]], null, true))) {
            break;
          }
        }
        return result;
      };
    }

    /**
     * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their
     * corresponding HTML entities.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} string The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escape('Fred, Wilma, & Pebbles');
     * // => 'Fred, Wilma, &amp; Pebbles'
     */
    function escape(string) {
      return string == null ? '' : String(string).replace(reUnescapedHtml, escapeHtmlChar);
    }

    /**
     * This method returns the first argument provided to it.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {*} value Any value.
     * @returns {*} Returns `value`.
     * @example
     *
     * var object = { 'name': 'fred' };
     * _.identity(object) === object;
     * // => true
     */
    function identity(value) {
      return value;
    }

    /**
     * Adds function properties of a source object to the destination object.
     * If `object` is a function methods will be added to its prototype as well.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Function|Object} [object=lodash] object The destination object.
     * @param {Object} source The object of functions to add.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.chain=true] Specify whether the functions added are chainable.
     * @example
     *
     * function capitalize(string) {
     *   return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
     * }
     *
     * _.mixin({ 'capitalize': capitalize });
     * _.capitalize('fred');
     * // => 'Fred'
     *
     * _('fred').capitalize().value();
     * // => 'Fred'
     *
     * _.mixin({ 'capitalize': capitalize }, { 'chain': false });
     * _('fred').capitalize();
     * // => 'Fred'
     */
    function mixin(object, source, options) {
      var chain = true,
          methodNames = source && functions(source);

      if (!source || (!options && !methodNames.length)) {
        if (options == null) {
          options = source;
        }
        ctor = lodashWrapper;
        source = object;
        object = lodash;
        methodNames = functions(source);
      }
      if (options === false) {
        chain = false;
      } else if (isObject(options) && 'chain' in options) {
        chain = options.chain;
      }
      var ctor = object,
          isFunc = isFunction(ctor);

      forEach(methodNames, function(methodName) {
        var func = object[methodName] = source[methodName];
        if (isFunc) {
          ctor.prototype[methodName] = function() {
            var chainAll = this.__chain__,
                value = this.__wrapped__,
                args = [value];

            push.apply(args, arguments);
            var result = func.apply(object, args);
            if (chain || chainAll) {
              if (value === result && isObject(result)) {
                return this;
              }
              result = new ctor(result);
              result.__chain__ = chainAll;
            }
            return result;
          };
        }
      });
    }

    /**
     * Reverts the '_' variable to its previous value and returns a reference to
     * the `lodash` function.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @returns {Function} Returns the `lodash` function.
     * @example
     *
     * var lodash = _.noConflict();
     */
    function noConflict() {
      context._ = oldDash;
      return this;
    }

    /**
     * A no-operation function.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @example
     *
     * var object = { 'name': 'fred' };
     * _.noop(object) === undefined;
     * // => true
     */
    function noop() {
      // no operation performed
    }

    /**
     * Gets the number of milliseconds that have elapsed since the Unix epoch
     * (1 January 1970 00:00:00 UTC).
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @example
     *
     * var stamp = _.now();
     * _.defer(function() { console.log(_.now() - stamp); });
     * // => logs the number of milliseconds it took for the deferred function to be called
     */
    var now = isNative(now = Date.now) && now || function() {
      return new Date().getTime();
    };

    /**
     * Converts the given value into an integer of the specified radix.
     * If `radix` is `undefined` or `0` a `radix` of `10` is used unless the
     * `value` is a hexadecimal, in which case a `radix` of `16` is used.
     *
     * Note: This method avoids differences in native ES3 and ES5 `parseInt`
     * implementations. See http://es5.github.io/#E.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} value The value to parse.
     * @param {number} [radix] The radix used to interpret the value to parse.
     * @returns {number} Returns the new integer value.
     * @example
     *
     * _.parseInt('08');
     * // => 8
     */
    var parseInt = nativeParseInt(whitespace + '08') == 8 ? nativeParseInt : function(value, radix) {
      // Firefox < 21 and Opera < 15 follow the ES3 specified implementation of `parseInt`
      return nativeParseInt(isString(value) ? value.replace(reLeadingSpacesAndZeros, '') : value, radix || 0);
    };

    /**
     * Creates a "_.pluck" style function, which returns the `key` value of a
     * given object.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} key The name of the property to retrieve.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var characters = [
     *   { 'name': 'fred',   'age': 40 },
     *   { 'name': 'barney', 'age': 36 }
     * ];
     *
     * var getName = _.property('name');
     *
     * _.map(characters, getName);
     * // => ['barney', 'fred']
     *
     * _.sortBy(characters, getName);
     * // => [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred',   'age': 40 }]
     */
    function property(key) {
      return function(object) {
        return object[key];
      };
    }

    /**
     * Produces a random number between `min` and `max` (inclusive). If only one
     * argument is provided a number between `0` and the given number will be
     * returned. If `floating` is truey or either `min` or `max` are floats a
     * floating-point number will be returned instead of an integer.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {number} [min=0] The minimum possible value.
     * @param {number} [max=1] The maximum possible value.
     * @param {boolean} [floating=false] Specify returning a floating-point number.
     * @returns {number} Returns a random number.
     * @example
     *
     * _.random(0, 5);
     * // => an integer between 0 and 5
     *
     * _.random(5);
     * // => also an integer between 0 and 5
     *
     * _.random(5, true);
     * // => a floating-point number between 0 and 5
     *
     * _.random(1.2, 5.2);
     * // => a floating-point number between 1.2 and 5.2
     */
    function random(min, max, floating) {
      var noMin = min == null,
          noMax = max == null;

      if (floating == null) {
        if (typeof min == 'boolean' && noMax) {
          floating = min;
          min = 1;
        }
        else if (!noMax && typeof max == 'boolean') {
          floating = max;
          noMax = true;
        }
      }
      if (noMin && noMax) {
        max = 1;
      }
      min = +min || 0;
      if (noMax) {
        max = min;
        min = 0;
      } else {
        max = +max || 0;
      }
      if (floating || min % 1 || max % 1) {
        var rand = nativeRandom();
        return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand +'').length - 1)))), max);
      }
      return baseRandom(min, max);
    }

    /**
     * Resolves the value of property `key` on `object`. If `key` is a function
     * it will be invoked with the `this` binding of `object` and its result returned,
     * else the property value is returned. If `object` is falsey then `undefined`
     * is returned.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Object} object The object to inspect.
     * @param {string} key The name of the property to resolve.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = {
     *   'cheese': 'crumpets',
     *   'stuff': function() {
     *     return 'nonsense';
     *   }
     * };
     *
     * _.result(object, 'cheese');
     * // => 'crumpets'
     *
     * _.result(object, 'stuff');
     * // => 'nonsense'
     */
    function result(object, key) {
      if (object) {
        var value = object[key];
        return isFunction(value) ? object[key]() : value;
      }
    }

    /**
     * Executes the callback `n` times, returning an array of the results
     * of each callback execution. The callback is bound to `thisArg` and invoked
     * with one argument; (index).
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {number} n The number of times to execute the callback.
     * @param {Function} callback The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns an array of the results of each `callback` execution.
     * @example
     *
     * var diceRolls = _.times(3, _.partial(_.random, 1, 6));
     * // => [3, 6, 4]
     *
     * _.times(3, function(n) { mage.castSpell(n); });
     * // => calls `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively
     *
     * _.times(3, function(n) { this.cast(n); }, mage);
     * // => also calls `mage.castSpell(n)` three times
     */
    function times(n, callback, thisArg) {
      n = (n = +n) > -1 ? n : 0;
      var index = -1,
          result = Array(n);

      callback = baseCreateCallback(callback, thisArg, 1);
      while (++index < n) {
        result[index] = callback(index);
      }
      return result;
    }

    /**
     * The inverse of `_.escape` this method converts the HTML entities
     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to their
     * corresponding characters.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} string The string to unescape.
     * @returns {string} Returns the unescaped string.
     * @example
     *
     * _.unescape('Fred, Barney &amp; Pebbles');
     * // => 'Fred, Barney & Pebbles'
     */
    function unescape(string) {
      return string == null ? '' : String(string).replace(reEscapedHtml, unescapeHtmlChar);
    }

    /**
     * Generates a unique ID. If `prefix` is provided the ID will be appended to it.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} [prefix] The value to prefix the ID with.
     * @returns {string} Returns the unique ID.
     * @example
     *
     * _.uniqueId('contact_');
     * // => 'contact_104'
     *
     * _.uniqueId();
     * // => '105'
     */
    function uniqueId(prefix) {
      var id = ++idCounter;
      return String(prefix == null ? '' : prefix) + id;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object that wraps the given value with explicit
     * method chaining enabled.
     *
     * @static
     * @memberOf _
     * @category Chaining
     * @param {*} value The value to wrap.
     * @returns {Object} Returns the wrapper object.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36 },
     *   { 'name': 'fred',    'age': 40 },
     *   { 'name': 'pebbles', 'age': 1 }
     * ];
     *
     * var youngest = _.chain(characters)
     *     .sortBy('age')
     *     .map(function(chr) { return chr.name + ' is ' + chr.age; })
     *     .first()
     *     .value();
     * // => 'pebbles is 1'
     */
    function chain(value) {
      value = new lodashWrapper(value);
      value.__chain__ = true;
      return value;
    }

    /**
     * Invokes `interceptor` with the `value` as the first argument and then
     * returns `value`. The purpose of this method is to "tap into" a method
     * chain in order to perform operations on intermediate results within
     * the chain.
     *
     * @static
     * @memberOf _
     * @category Chaining
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @returns {*} Returns `value`.
     * @example
     *
     * _([1, 2, 3, 4])
     *  .tap(function(array) { array.pop(); })
     *  .reverse()
     *  .value();
     * // => [3, 2, 1]
     */
    function tap(value, interceptor) {
      interceptor(value);
      return value;
    }

    /**
     * Enables explicit method chaining on the wrapper object.
     *
     * @name chain
     * @memberOf _
     * @category Chaining
     * @returns {*} Returns the wrapper object.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // without explicit chaining
     * _(characters).first();
     * // => { 'name': 'barney', 'age': 36 }
     *
     * // with explicit chaining
     * _(characters).chain()
     *   .first()
     *   .pick('age')
     *   .value();
     * // => { 'age': 36 }
     */
    function wrapperChain() {
      this.__chain__ = true;
      return this;
    }

    /**
     * Produces the `toString` result of the wrapped value.
     *
     * @name toString
     * @memberOf _
     * @category Chaining
     * @returns {string} Returns the string result.
     * @example
     *
     * _([1, 2, 3]).toString();
     * // => '1,2,3'
     */
    function wrapperToString() {
      return String(this.__wrapped__);
    }

    /**
     * Extracts the wrapped value.
     *
     * @name valueOf
     * @memberOf _
     * @alias value
     * @category Chaining
     * @returns {*} Returns the wrapped value.
     * @example
     *
     * _([1, 2, 3]).valueOf();
     * // => [1, 2, 3]
     */
    function wrapperValueOf() {
      return this.__wrapped__;
    }

    /*--------------------------------------------------------------------------*/

    // add functions that return wrapped values when chaining
    lodash.after = after;
    lodash.assign = assign;
    lodash.at = at;
    lodash.bind = bind;
    lodash.bindAll = bindAll;
    lodash.bindKey = bindKey;
    lodash.chain = chain;
    lodash.compact = compact;
    lodash.compose = compose;
    lodash.constant = constant;
    lodash.countBy = countBy;
    lodash.create = create;
    lodash.createCallback = createCallback;
    lodash.curry = curry;
    lodash.debounce = debounce;
    lodash.defaults = defaults;
    lodash.defer = defer;
    lodash.delay = delay;
    lodash.difference = difference;
    lodash.filter = filter;
    lodash.flatten = flatten;
    lodash.forEach = forEach;
    lodash.forEachRight = forEachRight;
    lodash.forIn = forIn;
    lodash.forInRight = forInRight;
    lodash.forOwn = forOwn;
    lodash.forOwnRight = forOwnRight;
    lodash.functions = functions;
    lodash.groupBy = groupBy;
    lodash.indexBy = indexBy;
    lodash.initial = initial;
    lodash.intersection = intersection;
    lodash.invert = invert;
    lodash.invoke = invoke;
    lodash.keys = keys;
    lodash.map = map;
    lodash.mapValues = mapValues;
    lodash.max = max;
    lodash.memoize = memoize;
    lodash.merge = merge;
    lodash.min = min;
    lodash.omit = omit;
    lodash.once = once;
    lodash.pairs = pairs;
    lodash.partial = partial;
    lodash.partialRight = partialRight;
    lodash.pick = pick;
    lodash.pluck = pluck;
    lodash.property = property;
    lodash.pull = pull;
    lodash.range = range;
    lodash.reject = reject;
    lodash.remove = remove;
    lodash.rest = rest;
    lodash.shuffle = shuffle;
    lodash.sortBy = sortBy;
    lodash.tap = tap;
    lodash.throttle = throttle;
    lodash.times = times;
    lodash.toArray = toArray;
    lodash.transform = transform;
    lodash.union = union;
    lodash.uniq = uniq;
    lodash.values = values;
    lodash.where = where;
    lodash.without = without;
    lodash.wrap = wrap;
    lodash.xor = xor;
    lodash.zip = zip;
    lodash.zipObject = zipObject;

    // add aliases
    lodash.collect = map;
    lodash.drop = rest;
    lodash.each = forEach;
    lodash.eachRight = forEachRight;
    lodash.extend = assign;
    lodash.methods = functions;
    lodash.object = zipObject;
    lodash.select = filter;
    lodash.tail = rest;
    lodash.unique = uniq;
    lodash.unzip = zip;

    // add functions to `lodash.prototype`
    mixin(lodash);

    /*--------------------------------------------------------------------------*/

    // add functions that return unwrapped values when chaining
    lodash.clone = clone;
    lodash.cloneDeep = cloneDeep;
    lodash.contains = contains;
    lodash.escape = escape;
    lodash.every = every;
    lodash.find = find;
    lodash.findIndex = findIndex;
    lodash.findKey = findKey;
    lodash.findLast = findLast;
    lodash.findLastIndex = findLastIndex;
    lodash.findLastKey = findLastKey;
    lodash.has = has;
    lodash.identity = identity;
    lodash.indexOf = indexOf;
    lodash.isArguments = isArguments;
    lodash.isArray = isArray;
    lodash.isBoolean = isBoolean;
    lodash.isDate = isDate;
    lodash.isElement = isElement;
    lodash.isEmpty = isEmpty;
    lodash.isEqual = isEqual;
    lodash.isFinite = isFinite;
    lodash.isFunction = isFunction;
    lodash.isNaN = isNaN;
    lodash.isNull = isNull;
    lodash.isNumber = isNumber;
    lodash.isObject = isObject;
    lodash.isPlainObject = isPlainObject;
    lodash.isRegExp = isRegExp;
    lodash.isString = isString;
    lodash.isUndefined = isUndefined;
    lodash.lastIndexOf = lastIndexOf;
    lodash.mixin = mixin;
    lodash.noConflict = noConflict;
    lodash.noop = noop;
    lodash.now = now;
    lodash.parseInt = parseInt;
    lodash.random = random;
    lodash.reduce = reduce;
    lodash.reduceRight = reduceRight;
    lodash.result = result;
    lodash.runInContext = runInContext;
    lodash.size = size;
    lodash.some = some;
    lodash.sortedIndex = sortedIndex;
    lodash.unescape = unescape;
    lodash.uniqueId = uniqueId;

    // add aliases
    lodash.all = every;
    lodash.any = some;
    lodash.detect = find;
    lodash.findWhere = find;
    lodash.foldl = reduce;
    lodash.foldr = reduceRight;
    lodash.include = contains;
    lodash.inject = reduce;

    mixin(function() {
      var source = {}
      forOwn(lodash, function(func, methodName) {
        if (!lodash.prototype[methodName]) {
          source[methodName] = func;
        }
      });
      return source;
    }(), false);

    /*--------------------------------------------------------------------------*/

    // add functions capable of returning wrapped and unwrapped values when chaining
    lodash.first = first;
    lodash.last = last;
    lodash.sample = sample;

    // add aliases
    lodash.take = first;
    lodash.head = first;

    forOwn(lodash, function(func, methodName) {
      var callbackable = methodName !== 'sample';
      if (!lodash.prototype[methodName]) {
        lodash.prototype[methodName]= function(n, guard) {
          var chainAll = this.__chain__,
              result = func(this.__wrapped__, n, guard);

          return !chainAll && (n == null || (guard && !(callbackable && typeof n == 'function')))
            ? result
            : new lodashWrapper(result, chainAll);
        };
      }
    });

    /*--------------------------------------------------------------------------*/

    /**
     * The semantic version number.
     *
     * @static
     * @memberOf _
     * @type string
     */
    lodash.VERSION = '2.4.1';

    // add "Chaining" functions to the wrapper
    lodash.prototype.chain = wrapperChain;
    lodash.prototype.toString = wrapperToString;
    lodash.prototype.value = wrapperValueOf;
    lodash.prototype.valueOf = wrapperValueOf;

    // add `Array` functions that return unwrapped values
    forEach(['join', 'pop', 'shift'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        var chainAll = this.__chain__,
            result = func.apply(this.__wrapped__, arguments);

        return chainAll
          ? new lodashWrapper(result, chainAll)
          : result;
      };
    });

    // add `Array` functions that return the existing wrapped value
    forEach(['push', 'reverse', 'sort', 'unshift'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        func.apply(this.__wrapped__, arguments);
        return this;
      };
    });

    // add `Array` functions that return new wrapped values
    forEach(['concat', 'slice', 'splice'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        return new lodashWrapper(func.apply(this.__wrapped__, arguments), this.__chain__);
      };
    });

    return lodash;
  }

  /*--------------------------------------------------------------------------*/

  // expose Lo-Dash
  var _ = runInContext();

  // some AMD build optimizers like r.js check for condition patterns like the following:
  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
    // Expose Lo-Dash to the global object even when an AMD loader is present in
    // case Lo-Dash is loaded with a RequireJS shim config.
    // See http://requirejs.org/docs/api.html#config-shim
    root._ = _;

    // define as an anonymous module so, through path mapping, it can be
    // referenced as the "underscore" module
    define('lodash',[],function() {
      return _;
    });
  }
  // check for `exports` after `define` in case a build optimizer adds an `exports` object
  else if (freeExports && freeModule) {
    // in Node.js or RingoJS
    if (moduleExports) {
      (freeModule.exports = _)._ = _;
    }
    // in Narwhal or Rhino -require
    else {
      freeExports._ = _;
    }
  }
  else {
    // in a browser or Rhino
    root._ = _;
  }
}.call(this));

/**
 * Helper module to work with ranges
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/range',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');
	
	function cmp(a, b, op) {
		switch (op) {
			case 'eq':
			case '==':
				return a === b;
			case 'lt':
			case '<':
				return a < b;
			case 'lte':
			case '<=':
				return a <= b;
			case 'gt':
			case '>':
				return a > b;
			case 'gte':
			case '>=':
				return a >= b;
		}
	}
	
	
	/**
	 * @type Range
	 * @constructor
	 * @param {Object} start
	 * @param {Number} len
	 */
	function Range(start, len) {
		if (typeof start === 'object' && 'start' in start) {
			// create range from object stub
			this.start = Math.min(start.start, start.end);
			this.end = Math.max(start.start, start.end);
		} else if (_.isArray(start)) {
			this.start = start[0];
			this.end = start[1];
		} else {
			len = typeof len === 'string' ? len.length : +len;
			this.start = start;
			this.end = start + len;
		}
	}
	
	Range.prototype = {
		length: function() {
			return Math.abs(this.end - this.start);
		},
		
		/**
		 * Returns <code>true</code> if passed range is equals to current one
		 * @param {Range} range
		 * @returns {Boolean}
		 */
		equal: function(range) {
			return this.cmp(range, 'eq', 'eq');
//			return this.start === range.start && this.end === range.end;
		},
		
		/**
		 * Shifts indexes position with passed <code>delta</code>
		 * @param {Number} delta
		 * @returns {Range} range itself
		 */
		shift: function(delta) {
			this.start += delta;
			this.end += delta;
			return this;
		},
		
		/**
		 * Check if two ranges are overlapped
		 * @param {Range} range
		 * @returns {Boolean}
		 */
		overlap: function(range) {
			return range.start <= this.end && range.end >= this.start;
		},
		
		/**
		 * Finds intersection of two ranges
		 * @param {Range} range
		 * @returns {Range} <code>null</code> if ranges does not overlap
		 */
		intersection: function(range) {
			if (this.overlap(range)) {
				var start = Math.max(range.start, this.start);
				var end = Math.min(range.end, this.end);
				return new Range(start, end - start);
			}
			
			return null;
		},
		
		/**
		 * Returns the union of the thow ranges.
		 * @param {Range} range
		 * @returns {Range} <code>null</code> if ranges are not overlapped
		 */
		union: function(range) {
			if (this.overlap(range)) {
				var start = Math.min(range.start, this.start);
				var end = Math.max(range.end, this.end);
				return new Range(start, end - start);
			}
			
			return null;
		},
		
		/**
		 * Returns a Boolean value that indicates whether a specified position 
		 * is in a given range.
		 * @param {Number} loc
		 */
		inside: function(loc) {
			return this.cmp(loc, 'lte', 'gt');
//			return this.start <= loc && this.end > loc;
		},
		
		/**
		 * Returns a Boolean value that indicates whether a specified position 
		 * is in a given range, but not equals bounds.
		 * @param {Number} loc
		 */
		contains: function(loc) {
			return this.cmp(loc, 'lt', 'gt');
		},
		
		/**
		 * Check if current range completely includes specified one
		 * @param {Range} r
		 * @returns {Boolean} 
		 */
		include: function(r) {
			return this.cmp(r, 'lte', 'gte');
//			return this.start <= r.start && this.end >= r.end;
		},
		
		/**
		 * Low-level comparision method
		 * @param {Number} loc
		 * @param {String} left Left comparison operator
		 * @param {String} right Right comaprison operator
		 */
		cmp: function(loc, left, right) {
			var a, b;
			if (loc instanceof Range) {
				a = loc.start;
				b = loc.end;
			} else {
				a = b = loc;
			}
			
			return cmp(this.start, a, left || '<=') && cmp(this.end, b, right || '>');
		},
		
		/**
		 * Returns substring of specified <code>str</code> for current range
		 * @param {String} str
		 * @returns {String}
		 */
		substring: function(str) {
			return this.length() > 0 
				? str.substring(this.start, this.end) 
				: '';
		},
		
		/**
		 * Creates copy of current range
		 * @returns {Range}
		 */
		clone: function() {
			return new Range(this.start, this.length());
		},
		
		/**
		 * @returns {Array}
		 */
		toArray: function() {
			return [this.start, this.end];
		},
		
		toString: function() {
			return this.valueOf();
		},

		valueOf: function() {
			return '{' + this.start + ', ' + this.length() + '}';
		}
	};

	/**
	 * Creates new range object instance
	 * @param {Object} start Range start or array with 'start' and 'end'
	 * as two first indexes or object with 'start' and 'end' properties
	 * @param {Number} len Range length or string to produce range from
	 * @returns {Range}
	 */
	module.exports = function(start, len) {
		if (typeof start == 'undefined' || start === null)
			return null;
			
		if (start instanceof Range)
			return start;
		
		if (typeof start == 'object' && 'start' in start && 'end' in start) {
			len = start.end - start.start;
			start = start.start;
		}
			
		return new Range(start, len);
	};

	module.exports.create = module.exports;

	module.exports.isRange = function(val) {
		return val instanceof Range;
	};

	/**
	 * <code>Range</code> object factory, the same as <code>this.create()</code>
	 * but last argument represents end of range, not length
	 * @returns {Range}
	 */
	module.exports.create2 = function(start, end) {
		if (_.isNumber(start) && _.isNumber(end)) {
			end -= start;
		}
		
		return this.create(start, end);
	};

	/**
	 * Helper function that sorts ranges in order as they
	 * appear in text
	 * @param  {Array} ranges
	 * @return {Array}
	 */
	module.exports.sort = function(ranges, reverse) {
		ranges = ranges.sort(function(a, b) {
			if (a.start === b.start) {
				return b.end - a.end;
			}

			return a.start - b.start;
		});

		reverse && ranges.reverse();
		return ranges;
	};

	return module.exports;
});
/**
 * Common utility helper for Emmet
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/common',['require','exports','module','lodash','../assets/range'],function(require, exports, module) {
	var _ = require('lodash');
	var range = require('../assets/range');

	/** 
	 * Special token used as a placeholder for caret positions inside 
	 * generated output 
	 */
	var caretPlaceholder = '${0}';
	
	return {
		reTag: /<\/?[\w:\-]+(?:\s+[\w\-:]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*\s*(\/?)>$/,

		defaultSyntax: function() {
			return 'html';
		},

		defaultProfile: function() {
			return 'plain';
		},
		
		/**
		 * Test if passed string ends with XHTML tag. This method is used for testing
		 * '>' character: it belongs to tag or it's a part of abbreviation? 
		 * @param {String} str
		 * @return {Boolean}
		 */
		endsWithTag: function(str) {
			return this.reTag.test(str);
		},
		
		/**
		 * Check if passed symbol is a number
		 * @param {String} ch
		 * @returns {Boolean}
		 */
		isNumeric: function(ch) {
			if (typeof(ch) == 'string')
				ch = ch.charCodeAt(0);
				
			return (ch && ch > 47 && ch < 58);
		},
		
		/**
		 * Trim whitespace from string
		 * @param {String} text
		 * @return {String}
		 */
		trim: (function() {
			if (String.prototype.trim) {
				return function(text) {
					return text ? text.trim() : '';
				};
			}

			return function(text) {
				return (text || "").replace(/^\s+|\s+$/g, "");
			}
		})(),
		
		/**
		 * Split text into lines. Set <code>remove_empty</code> to true to filter
		 * empty lines
		 * @param {String} text Text to split
		 * @param {Boolean} removeEmpty Remove empty lines from result
		 * @return {Array}
		 */
		splitByLines: function(text, removeEmpty) {
			// IE fails to split string by regexp, 
			// need to normalize newlines first
			// Also, Mozilla's Rhiho JS engine has a weird newline bug
			var nl = '\n';
			var lines = (text || '')
				.replace(/\r\n/g, '\n')
				.replace(/\n\r/g, '\n')
				.replace(/\r/g, '\n')
				.replace(/\n/g, nl)
				.split(nl);
			
			if (removeEmpty) {
				lines = _.filter(lines, function(line) {
					return line.length && !!this.trim(line);
				}, this);
			}
			
			return lines;
		},
		
		/**
		 * Repeats string <code>howMany</code> times
		 * @param {String} str
		 * @param {Number} how_many
		 * @return {String}
		 */
		repeatString: function(str, howMany) {
			var out = '';
			while (howMany--) {
				out += str;
			}

			return out;
		},
		
		/**
		 * Returns list of paddings that should be used to align passed string
		 * @param {Array} strings
		 * @returns {Array}
		 */
		getStringsPads: function(strings) {
			var lengths = _.map(strings, function(s) {
				return _.isString(s) ? s.length : +s;
			});
			
			var max = _.max(lengths);
			return _.map(lengths, function(l) {
				var pad = max - l;
				return pad ? this.repeatString(' ', pad) : '';
			}, this);
		},
		
		/**
		 * Indents text with padding
		 * @param {String} text Text to indent
		 * @param {String} pad Padding size (number) or padding itself (string)
		 * @return {String}
		 */
		padString: function(text, pad) {
			var result = [];
			var lines = this.splitByLines(text);
			var nl = '\n';
				
			result.push(lines[0]);
			for (var j = 1; j < lines.length; j++) 
				result.push(nl + pad + lines[j]);
				
			return result.join('');
		},
		
		/**
		 * Pad string with zeroes
		 * @param {String} str String to pad
		 * @param {Number} pad Desired string length
		 * @return {String}
		 */
		zeroPadString: function(str, pad) {
			var padding = '';
			var il = str.length;
				
			while (pad > il++) padding += '0';
			return padding + str; 
		},
		
		/**
		 * Removes padding at the beginning of each text's line
		 * @param {String} text
		 * @param {String} pad
		 */
		unindentString: function(text, pad) {
			var lines = this.splitByLines(text);
			var pl = pad.length;
			for (var i = 0, il = lines.length, line; i < il; i++) {
				line = lines[i];
				if (line.substr(0, pl) === pad) {
					lines[i] = line.substr(pl);
				}
			}
			
			return lines.join('\n');
		},
		
		/**
		 * Replaces unescaped symbols in <code>str</code>. For example, the '$' symbol
		 * will be replaced in 'item$count', but not in 'item\$count'.
		 * @param {String} str Original string
		 * @param {String} symbol Symbol to replace
		 * @param {String} replace Symbol replacement. Might be a function that 
		 * returns new value
		 * @return {String}
		 */
		replaceUnescapedSymbol: function(str, symbol, replace) {
			var i = 0;
			var il = str.length;
			var sl = symbol.length;
			var matchCount = 0;
				
			while (i < il) {
				if (str.charAt(i) == '\\') {
					// escaped symbol, skip next character
					i += sl + 1;
				} else if (str.substr(i, sl) == symbol) {
					// have match
					var curSl = sl;
					matchCount++;
					var newValue = replace;
					if (_.isFunction(replace)) {
						var replaceData = replace(str, symbol, i, matchCount);
						if (replaceData) {
							curSl = replaceData[0].length;
							newValue = replaceData[1];
						} else {
							newValue = false;
						}
					}
					
					if (newValue === false) { // skip replacement
						i++;
						continue;
					}
					
					str = str.substring(0, i) + newValue + str.substring(i + curSl);
					// adjust indexes
					il = str.length;
					i += newValue.length;
				} else {
					i++;
				}
			}
			
			return str;
		},
		
		/**
		 * Replaces '$' character in string assuming it might be escaped with '\'
		 * @param {String} str String where character should be replaced
		 * @param {String} value New value
		 * @return {String}
		 */
		replaceCounter: function(str, value, total) {
			var symbol = '$';
			// in case we received strings from Java, convert the to native strings
			str = String(str);
			value = String(value);
			
			if (/^\-?\d+$/.test(value)) {
				value = +value;
			}
			
			var that = this;
			
			return this.replaceUnescapedSymbol(str, symbol, function(str, symbol, pos, matchNum){
				if (str.charAt(pos + 1) == '{' || that.isNumeric(str.charAt(pos + 1)) ) {
					// it's a variable, skip it
					return false;
				}
				
				// replace sequense of $ symbols with padded number  
				var j = pos + 1;
				while(str.charAt(j) == '$' && str.charAt(j + 1) != '{') j++;
				var pad = j - pos;
				
				// get counter base
				var base = 0, decrement = false, m;
				if ((m = str.substr(j).match(/^@(\-?)(\d*)/))) {
					j += m[0].length;
					
					if (m[1]) {
						decrement = true;
					}
					
					base = parseInt(m[2] || 1, 10) - 1;
				}
				
				if (decrement && total && _.isNumber(value)) {
					value = total - value + 1;
				}
				
				value += base;
				
				return [str.substring(pos, j), that.zeroPadString(value + '', pad)];
			});
		},
		
		/**
		 * Check if string matches against <code>reTag</code> regexp. This 
		 * function may be used to test if provided string contains HTML tags
		 * @param {String} str
		 * @returns {Boolean}
		 */
		matchesTag: function(str) {
			return this.reTag.test(str || '');
		},
		
		/**
		 * Escapes special characters used in Emmet, like '$', '|', etc.
		 * Use this method before passing to actions like "Wrap with Abbreviation"
		 * to make sure that existing special characters won't be altered
		 * @param {String} text
		 * @return {String}
		 */
		escapeText: function(text) {
			return text.replace(/([\$\\])/g, '\\$1');
		},
		
		/**
		 * Unescapes special characters used in Emmet, like '$', '|', etc.
		 * @param {String} text
		 * @return {String}
		 */
		unescapeText: function(text) {
			return text.replace(/\\(.)/g, '$1');
		},
		
		/**
		 * Returns caret placeholder
		 * @returns {String}
		 */
		getCaretPlaceholder: function() {
			return _.isFunction(caretPlaceholder) 
				? caretPlaceholder.apply(this, arguments)
				: caretPlaceholder;
		},
		
		/**
		 * Sets new representation for carets in generated output
		 * @param {String} value New caret placeholder. Might be a 
		 * <code>Function</code>
		 */
		setCaretPlaceholder: function(value) {
			caretPlaceholder = value;
		},
		
		/**
		 * Returns line padding
		 * @param {String} line
		 * @return {String}
		 */
		getLinePadding: function(line) {
			return (line.match(/^(\s+)/) || [''])[0];
		},
		
		/**
		 * Helper function that returns padding of line of <code>pos</code>
		 * position in <code>content</code>
		 * @param {String} content
		 * @param {Number} pos
		 * @returns {String}
		 */
		getLinePaddingFromPosition: function(content, pos) {
			var lineRange = this.findNewlineBounds(content, pos);
			return this.getLinePadding(lineRange.substring(content));
		},
		
		/**
		 * Escape special regexp chars in string, making it usable for creating dynamic
		 * regular expressions
		 * @param {String} str
		 * @return {String}
		 */
		escapeForRegexp: function(str) {
			var specials = new RegExp("[.*+?|()\\[\\]{}\\\\]", "g"); // .*+?|()[]{}\
			return str.replace(specials, "\\$&");
		},
		
		/**
		 * Make decimal number look good: convert it to fixed precision end remove
		 * traling zeroes 
		 * @param {Number} num
		 * @param {Number} fracion Fraction numbers (default is 2)
		 * @return {String}
		 */
		prettifyNumber: function(num, fraction) {
			return num.toFixed(typeof fraction == 'undefined' ? 2 : fraction).replace(/\.?0+$/, '');
		},
		
		/**
		 * Replace substring of <code>str</code> with <code>value</code>
		 * @param {String} str String where to replace substring
		 * @param {String} value New substring value
		 * @param {Number} start Start index of substring to replace. May also
		 * be a <code>Range</code> object: in this case, the <code>end</code>
		 * argument is not required
		 * @param {Number} end End index of substring to replace. If ommited, 
		 * <code>start</code> argument is used
		 */
		replaceSubstring: function(str, value, start, end) {
			if (_.isObject(start) && 'end' in start) {
				end = start.end;
				start = start.start;
			}
			
			if (_.isString(end))
				end = start + end.length;
			
			if (_.isUndefined(end))
				end = start;
			
			if (start < 0 || start > str.length)
				return str;
			
			return str.substring(0, start) + value + str.substring(end);
		},

		/**
		 * Fills substrings in `content`, defined by given ranges,
		 * wich `ch` character
		 * @param  {String} content
		 * @param  {Array} ranges
		 * @return {String}
		 */
		replaceWith: function(content, ranges, ch, noRepeat) {
			if (ranges.length) {
				var offset = 0, fragments = [];
				_.each(ranges, function(r) {
					var repl = noRepeat ? ch : this.repeatString(ch, r[1] - r[0]);
					fragments.push(content.substring(offset, r[0]), repl);
					offset = r[1];
				}, this);

				content = fragments.join('') + content.substring(offset);
			}

			return content;
		},
		
		/**
		 * Narrows down text range, adjusting selection to non-space characters
		 * @param {String} text
		 * @param {Number} start Starting range in <code>text</code> where 
		 * slection should be adjusted. Can also be any object that is accepted
		 * by <code>Range</code> class
		 * @return {Range}
		 */
		narrowToNonSpace: function(text, start, end) {
			var rng = range.create(start, end);
			
			var reSpace = /[\s\n\r\u00a0]/;
			// narrow down selection until first non-space character
			while (rng.start < rng.end) {
				if (!reSpace.test(text.charAt(rng.start)))
					break;
					
				rng.start++;
			}
			
			while (rng.end > rng.start) {
				rng.end--;
				if (!reSpace.test(text.charAt(rng.end))) {
					rng.end++;
					break;
				}
			}
			
			return rng;
		},
		
		/**
		 * Find start and end index of text line for <code>from</code> index
		 * @param {String} text 
		 * @param {Number} from
		 */
		findNewlineBounds: function(text, from) {
			var len = text.length,
				start = 0,
				end = len - 1, 
				ch;

			
			// search left
			for (var i = from - 1; i > 0; i--) {
				ch = text.charAt(i);
				if (ch == '\n' || ch == '\r') {
					start = i + 1;
					break;
				}
			}
			// search right
			for (var j = from; j < len; j++) {
				ch = text.charAt(j);
				if (ch == '\n' || ch == '\r') {
					end = j;
					break;
				}
			}
			
			return range.create(start, end - start);
		},

		/**
		 * Deep merge of two or more objects. Taken from jQuery.extend()
		 */
		deepMerge: function() {
			var options, name, src, copy, copyIsArray, clone,
				target = arguments[0] || {},
				i = 1,
				length = arguments.length;


			// Handle case when target is a string or something (possible in deep copy)
			if (!_.isObject(target) && !_.isFunction(target)) {
				target = {};
			}

			for ( ; i < length; i++ ) {
				// Only deal with non-null/undefined values
				if ( (options = arguments[ i ]) !== null ) {
					// Extend the base object
					for ( name in options ) {
						src = target[ name ];
						copy = options[ name ];

						// Prevent never-ending loop
						if ( target === copy ) {
							continue;
						}

						// Recurse if we're merging plain objects or arrays
						if ( copy && ( _.isObject(copy) || (copyIsArray = _.isArray(copy)) ) ) {
							if ( copyIsArray ) {
								copyIsArray = false;
								clone = src && _.isArray(src) ? src : [];

							} else {
								clone = src && _.isObject(src) ? src : {};
							}

							// Never move original objects, clone them
							target[ name ] = this.deepMerge(clone, copy );

						// Don't bring in undefined values
						} else if ( copy !== undefined ) {
							target[ name ] = copy;
						}
					}
				}
			}

			// Return the modified object
			return target;
		},

		/**
		 * Dead simple string-to-JSON parser
		 * @param {String} str
		 * @returns {Object}
		 */
		parseJSON: function(str) {
			if (typeof str == 'object') {
				return str;
			}
			
			try {
				return JSON.parse(str);
			} catch(e) {
				return {};
			}
		}
	};
});

/**
 * Module for working with file. Shall implement
 * IEmmetFile interface.
 *
 * Since implementation of this module depends
 * greatly on current runtime, this module must be
 * initialized with actual implementation first
 * before use. E.g. 
 * require('./plugin/file')({
 * 	read: function() {...}
 * })
 *
 * By default, this module provides Node.JS implementation
 */

if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('plugin/file',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');
	var fs = {};
	var path = {};

	// hide it from Require.JS parser
	(function(r) {
		if (typeof define === 'undefined' || !define.amd) {
			fs = r('fs');
			path = r('path');
		}
	})(require);

	// module is a function that can extend itself
	module.exports = function(obj) {
		if (obj) {
			_.extend(module.exports, obj);
		}
	};

	function bts(bytes) {
		return _.map(bytes, function(b) {
			return String.fromCharCode(b);
		}).join('');
	}

	function isURL(path) {
		var re = /^https?:\/\//;
		return re.test(path);
	}

	return _.extend(module.exports, {
		_parseParams: function(args) {
			var params = {
				path: args[0],
				size: 0
			};

			args = _.rest(args);
			params.callback = _.last(args);
			args = _.initial(args);
			if (args.length) {
				params.size = args[0];
			}

			return params;
		},

		_read: function(params, callback) {
			if (isURL(params.path)) {
				var req = require(/^https:/.test(params.path) ? 'https' : 'http').get(params.path, function(res) {
					var bufs = [];
					var totalLength = 0;
					var finished = false;
					res
						.on('data', function(chunk) {
							totalLength += chunk.length;
							bufs.push(chunk);
							if (params.size && totalLength >= params.size) {
								finished = true;
								callback(null, Buffer.concat(bufs));
								req.abort();
							}
						})
						.on('end', function() {
							if (!finished) {
								finished = true;
								callback(null, Buffer.concat(bufs));
							}
						});
				}).on('error', callback);
			} else {
				if (params.size) {
					var fd = fs.openSync(params.path, 'r');
					var buf = new Buffer(params.size);
					fs.read(fd, buf, 0, params.size, null, function(err, bytesRead) {
						callback(err, buf)
					});
				} else {
					callback(null, fs.readFileSync(params.path));
				}
			}
		},

		/**
		 * Reads binary file content and return it
		 * @param {String} path File's relative or absolute path
		 * @return {String}
		 */
		read: function(path, size, callback) {
			var params = this._parseParams(arguments);
			this._read(params, function(err, buf) {
				params.callback(err, err ? '' : bts(buf));
			});
		},

		/**
		 * Read file content and return it
		 * @param {String} path File's relative or absolute path
		 * @return {String}
		 */
		readText: function(path, size, callback) {
			var params = this._parseParams(arguments);
			this._read(params, function(err, buf) {
				params.callback(err, err ? '' : buf.toString());
			});
		},
		
		/**
		 * Locate <code>file_name</code> file that relates to <code>editor_file</code>.
		 * File name may be absolute or relative path
		 * 
		 * <b>Dealing with absolute path.</b>
		 * Many modern editors have a "project" support as information unit, but you
		 * should not rely on project path to find file with absolute path. First,
		 * it requires user to create a project before using this method (and this 
		 * is not very convenient). Second, project path doesn't always points to
		 * to website's document root folder: it may point, for example, to an 
		 * upper folder which contains server-side scripts.
		 * 
		 * For better result, you should use the following algorithm in locating
		 * absolute resources:
		 * 1) Get parent folder for <code>editorFile</code> as a start point
		 * 2) Append required <code>fileName</code> to start point and test if
		 * file exists
		 * 3) If it doesn't exists, move start point one level up (to parent folder)
		 * and repeat step 2.
		 * 
		 * @param {String} editorFile
		 * @param {String} fileName
		 * @return {String} Returns null if <code>fileName</code> cannot be located
		 */
		locateFile: function(editorFile, fileName) {
			if (isURL(fileName)) {
				return fileName;
			}

			var dirname = editorFile, f;
			fileName = fileName.replace(/^\/+/, '');
			while (dirname && dirname !== path.dirname(dirname)) {
				dirname = path.dirname(dirname);
				f = path.join(dirname, fileName);
				if (fs.existsSync(f))
					return f;
			}
			
			return '';
		},
		
		/**
		 * Creates absolute path by concatenating <code>parent</code> and <code>fileName</code>.
		 * If <code>parent</code> points to file, its parent directory is used
		 * @param {String} parent
		 * @param {String} fileName
		 * @return {String}
		 */
		createPath: function(parent, fileName, callback) {
			var stat = fs.statSync(parent);
			if (stat && !stat.isDirectory()) {
				parent = path.dirname(parent);
			}
			
			return callback(path.resolve(parent, fileName));
		},
		
		/**
		 * Saves <code>content</code> as <code>file</code>
		 * @param {String} file File's absolute path
		 * @param {String} content File content
		 */
		save: function(file, content) {
			fs.writeFileSync(file, content, 'ascii');
		},
		
		/**
		 * Returns file extension in lower case
		 * @param {String} file
		 * @return {String}
		 */
		getExt: function(file) {
			var m = (file || '').match(/\.([\w\-]+)$/);
			return m ? m[1].toLowerCase() : '';
		}
	
	});
});
/**
 * @author Sergey Chikuyonok (serge.che@gmail.com)
 * @link http://chikuyonok.ru
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/base64',['require','exports','module'],function(require, exports, module) {
	var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
	
	return {
		/**
		 * Encodes data using base64 algorithm
		 * @author Tyler Akins (http://rumkin.com)
		 * @param {String} input
		 * @returns {String}
		 */
		encode : function(input) {
			var output = [];
			var chr1, chr2, chr3, enc1, enc2, enc3, enc4, cdp1, cdp2, cdp3;
			var i = 0, il = input.length, b64 = chars;

			while (i < il) {

				cdp1 = input.charCodeAt(i++);
				cdp2 = input.charCodeAt(i++);
				cdp3 = input.charCodeAt(i++);

				chr1 = cdp1 & 0xff;
				chr2 = cdp2 & 0xff;
				chr3 = cdp3 & 0xff;

				enc1 = chr1 >> 2;
				enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
				enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
				enc4 = chr3 & 63;

				if (isNaN(cdp2)) {
					enc3 = enc4 = 64;
				} else if (isNaN(cdp3)) {
					enc4 = 64;
				}

				output.push(b64.charAt(enc1) + b64.charAt(enc2) + b64.charAt(enc3) + b64.charAt(enc4));
			}

			return output.join('');
		},

		/**
		 * Decodes string using MIME base64 algorithm
		 * 
		 * @author Tyler Akins (http://rumkin.com)
		 * @param {String} data
		 * @return {String}
		 */
		decode : function(data) {
			var o1, o2, o3, h1, h2, h3, h4, bits, i = 0, ac = 0, tmpArr = [];
			var b64 = chars, il = data.length;

			if (!data) {
				return data;
			}

			data += '';

			do { // unpack four hexets into three octets using index points in b64
				h1 = b64.indexOf(data.charAt(i++));
				h2 = b64.indexOf(data.charAt(i++));
				h3 = b64.indexOf(data.charAt(i++));
				h4 = b64.indexOf(data.charAt(i++));

				bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;

				o1 = bits >> 16 & 0xff;
				o2 = bits >> 8 & 0xff;
				o3 = bits & 0xff;

				if (h3 == 64) {
					tmpArr[ac++] = String.fromCharCode(o1);
				} else if (h4 == 64) {
					tmpArr[ac++] = String.fromCharCode(o1, o2);
				} else {
					tmpArr[ac++] = String.fromCharCode(o1, o2, o3);
				}
			} while (i < il);

			return tmpArr.join('');
		}
	};
});
/**
 * A trimmed version of CodeMirror's StringStream module for string parsing
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/stringStream',['require','exports','module'],function(require, exports, module) {
	/**
	 * @type StringStream
	 * @constructor
	 * @param {String} string Assuming that bound string should be
	 * immutable
	 */
	function StringStream(string) {
		this.pos = this.start = 0;
		this.string = string;
		this._length = string.length;
	}
	
	StringStream.prototype = {
		/**
		 * Returns true only if the stream is at the end of the line.
		 * @returns {Boolean}
		 */
		eol: function() {
			return this.pos >= this._length;
		},
		
		/**
		 * Returns true only if the stream is at the start of the line
		 * @returns {Boolean}
		 */
		sol: function() {
			return this.pos === 0;
		},
		
		/**
		 * Returns the next character in the stream without advancing it. 
		 * Will return <code>undefined</code> at the end of the line.
		 * @returns {String}
		 */
		peek: function() {
			return this.string.charAt(this.pos);
		},
		
		/**
		 * Returns the next character in the stream and advances it.
		 * Also returns <code>undefined</code> when no more characters are available.
		 * @returns {String}
		 */
		next: function() {
			if (this.pos < this._length)
				return this.string.charAt(this.pos++);
		},
		
		/**
		 * match can be a character, a regular expression, or a function that
		 * takes a character and returns a boolean. If the next character in the
		 * stream 'matches' the given argument, it is consumed and returned.
		 * Otherwise, undefined is returned.
		 * @param {Object} match
		 * @returns {String}
		 */
		eat: function(match) {
			var ch = this.string.charAt(this.pos), ok;
			if (typeof match == "string")
				ok = ch == match;
			else
				ok = ch && (match.test ? match.test(ch) : match(ch));
			
			if (ok) {
				++this.pos;
				return ch;
			}
		},
		
		/**
		 * Repeatedly calls <code>eat</code> with the given argument, until it
		 * fails. Returns <code>true</code> if any characters were eaten.
		 * @param {Object} match
		 * @returns {Boolean}
		 */
		eatWhile: function(match) {
			var start = this.pos;
			while (this.eat(match)) {}
			return this.pos > start;
		},
		
		/**
		 * Shortcut for <code>eatWhile</code> when matching white-space.
		 * @returns {Boolean}
		 */
		eatSpace: function() {
			var start = this.pos;
			while (/[\s\u00a0]/.test(this.string.charAt(this.pos)))
				++this.pos;
			return this.pos > start;
		},
		
		/**
		 * Moves the position to the end of the line.
		 */
		skipToEnd: function() {
			this.pos = this._length;
		},
		
		/**
		 * Skips to the next occurrence of the given character, if found on the
		 * current line (doesn't advance the stream if the character does not
		 * occur on the line). Returns true if the character was found.
		 * @param {String} ch
		 * @returns {Boolean}
		 */
		skipTo: function(ch) {
			var found = this.string.indexOf(ch, this.pos);
			if (found > -1) {
				this.pos = found;
				return true;
			}
		},
		
		/**
		 * Skips to <code>close</code> character which is pair to <code>open</code>
		 * character, considering possible pair nesting. This function is used
		 * to consume pair of characters, like opening and closing braces
		 * @param {String} open
		 * @param {String} close
		 * @returns {Boolean} Returns <code>true</code> if pair was successfully
		 * consumed
		 */
		skipToPair: function(open, close, skipString) {
			var braceCount = 0, ch;
			var pos = this.pos, len = this._length;
			while (pos < len) {
				ch = this.string.charAt(pos++);
				if (ch == open) {
					braceCount++;
				} else if (ch == close) {
					braceCount--;
					if (braceCount < 1) {
						this.pos = pos;
						return true;
					}
				} else if (skipString && (ch == '"' || ch == "'")) {
					this.skipString(ch);
				}
			}
			
			return false;
		},

		/**
		 * A helper function which, in case of either single or
		 * double quote was found in current position, skips entire
		 * string (quoted value)
		 * @return {Boolean} Wether quoted string was skipped
		 */
		skipQuoted: function(noBackup) {
			var ch = this.string.charAt(noBackup ? this.pos : this.pos - 1);
			if (ch === '"' || ch === "'") {
				if (noBackup) {
					this.pos++;
				}
				return this.skipString(ch);
			}
		},

		/**
		 * A custom function to skip string literal, e.g. a "double-quoted"
		 * or 'single-quoted' value
		 * @param  {String} quote An opening quote
		 * @return {Boolean}
		 */
		skipString: function(quote) {
			var pos = this.pos, len = this._length, ch;
			while (pos < len) {
				ch = this.string.charAt(pos++);
				if (ch == '\\') {
					continue;
				} else if (ch == quote) {
					this.pos = pos;
					return true;
				}
			}

			return false;
		},
		
		/**
		 * Backs up the stream n characters. Backing it up further than the
		 * start of the current token will cause things to break, so be careful.
		 * @param {Number} n
		 */
		backUp : function(n) {
			this.pos -= n;
		},
		
		/**
		 * Act like a multi-character <code>eat</code>—if <code>consume</code> is true or
		 * not given—or a look-ahead that doesn't update the stream position—if
		 * it is false. <code>pattern</code> can be either a string or a
		 * regular expression starting with ^. When it is a string,
		 * <code>caseInsensitive</code> can be set to true to make the match
		 * case-insensitive. When successfully matching a regular expression,
		 * the returned value will be the array returned by <code>match</code>,
		 * in case you need to extract matched groups.
		 * 
		 * @param {RegExp} pattern
		 * @param {Boolean} consume
		 * @param {Boolean} caseInsensitive
		 * @returns
		 */
		match: function(pattern, consume, caseInsensitive) {
			if (typeof pattern == "string") {
				var cased = caseInsensitive
					? function(str) {return str.toLowerCase();}
					: function(str) {return str;};
				
				if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) {
					if (consume !== false)
						this.pos += pattern.length;
					return true;
				}
			} else {
				var match = this.string.slice(this.pos).match(pattern);
				if (match && consume !== false)
					this.pos += match[0].length;
				return match;
			}
		},
		
		/**
		 * Get the string between the start of the current token and the 
		 * current stream position.
		 * @returns {String}
		 */
		current: function(backUp) {
			return this.string.slice(this.start, this.pos - (backUp ? 1 : 0));
		}
	};

	module.exports = function(string) {
		return new StringStream(string);
	};

	/** @deprecated */
	module.exports.create = module.exports;
	return module.exports;
});
/**
 * Utility module for working with comments in source code
 * (mostly stripping it from source)
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/comments',['require','exports','module','lodash','./common','../assets/range','../assets/stringStream'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('./common');
	var range = require('../assets/range');
	var stringStream = require('../assets/stringStream');
	var reHasComment = /\/\*|\/\//;

	return {
		/**
		 * Replaces all comments in given CSS source with spaces,
		 * which allows more reliable (and faster) token search
		 * in CSS content
		 * @param  {String} content CSS content
		 * @return {String}
		 */
		strip: function(content) {
			if (!reHasComment.test(content)) {
				return content;
			}

			var stream = stringStream(content);
			var replaceRanges = [];
			var ch, ch2;

			while ((ch = stream.next())) {
				if (ch === '/') {
					ch2 = stream.peek();
					if (ch2 === '*') { // multiline CSS comment
						stream.start = stream.pos - 1;

						if (stream.skipTo('*/')) {
							stream.pos += 2;
						} else {
							// unclosed comment
							stream.skipToEnd();
						}

						replaceRanges.push([stream.start, stream.pos]);
					} else if (ch2 === '/') {
						// preprocessor’s single line comments
						stream.start = stream.pos - 1;
						while ((ch2 = stream.next())) {
							if (ch2 === '\n' || ch2 == '\r') {
								break
							}
						}

						replaceRanges.push([stream.start, stream.pos]);
					}
				} else {
					stream.skipQuoted();
				}
			}

			return utils.replaceWith(content, replaceRanges, ' ');
		}
	};
});
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/css',['require','exports','module'],function(require, exports, module) {
	var session = {tokens: null};
	
	// walks around the source
	var walker = {
		init: function (source) {
			// this.source = source.replace(/\r\n?/g, '\n');
			this.source = source;
			this.ch = '';
			this.chnum = -1;
		
			// advance
			this.nextChar();
		},
		nextChar: function () {
			return this.ch = this.source.charAt(++this.chnum);
		},
		peek: function() {
			return this.source.charAt(this.chnum + 1);
		}
	};

	// utility helpers
	function isNameChar(c, cc) {
		cc = cc || c.charCodeAt(0);
		return (
			(cc >= 97 && cc <= 122 /* a-z */) || 
			(cc >= 65 && cc <= 90 /* A-Z */) || 
			/* 
			Experimental: include cyrillic ranges 
			since some letters, similar to latin ones, can 
			accidentally appear in CSS tokens
			*/
			(cc >= 1024 && cc <= 1279) || 
			c === '&' || /* selector placeholder (LESS, SCSS) */
			c === '_' || 
			c === '<' || /* comparisons (LESS, SCSS) */
			c === '>' || 
			c === '=' || 
			c === '-'
		);
	}

	function isDigit(c, cc) {
		cc = cc || c.charCodeAt(0);
		return (cc >= 48 && cc <= 57);
	}

	var isOp = (function () {
		var opsa = "{}[]()+*=.,;:>~|\\%$#@^!".split(''),
			opsmatcha = "*^|$~".split(''),
			ops = {},
			opsmatch = {},
			i = 0;
		for (; i < opsa.length; i += 1) {
			ops[opsa[i]] = true;
		}
		for (i = 0; i < opsmatcha.length; i += 1) {
			opsmatch[opsmatcha[i]] = true;
		}
		return function (ch, matchattr) {
			if (matchattr) {
				return ch in opsmatch;
			}
			return ch in ops;
		};
	}());
	
	// creates token objects and pushes them to a list
	function tokener(value, type) {
		session.tokens.push({
			value: value,
			type:  type || value,
			start: null,
			end:   null
		});
	}

	function getPosInfo(w) {
		var errPos = w.chnum;
		var source = w.source.replace(/\r\n?/g, '\n');
		var part = w.source.substring(0, errPos + 1).replace(/\r\n?/g, '\n');
		var lines = part.split('\n');
		var ch = (lines[lines.length - 1] || '').length;
		var fullLine = source.split('\n')[lines.length - 1] || '';
		
		var chunkSize = 100;
		var offset = Math.max(0, ch - chunkSize);
		var formattedLine = fullLine.substr(offset, chunkSize * 2) + '\n';
		for (var i = 0; i < ch - offset - 1; i++) {
			formattedLine += '-';
		}
		formattedLine += '^';

		return {
			line: lines.length,
			ch: ch,
			text: fullLine,
			hint: formattedLine
		};
	}

	function raiseError(message) {
		var err = error(message);
		var errObj = new Error(err.message, '', err.line);
		errObj.line = err.line;
		errObj.ch = err.ch;
		errObj.name = err.name;
		errObj.hint = err.hint;

		throw errObj;
	}
	
	// oops
	function error(m) { 
		var w = walker;
		var info = getPosInfo(walker);
		var tokens = session.tokens;
		session.tokens = null;

		var message = 'CSS parsing error at line ' + info.line + ', char ' + info.ch + ': ' + m;
		message += '\n' +  info.hint;
		return {
			name: "ParseError",
			message: message,
			hint: info.hint,
			line: info.line,
			ch: info.ch
		};
	}


	// token handlers follow for:
	// white space, comment, string, identifier, number, operator
	function white() {
		var c = walker.ch,
			token = '';
	
		while (c === " " || c === "\t") {
			token += c;
			c = walker.nextChar();
		}
	
		tokener(token, 'white');
	
	}

	function comment() {
		var w = walker,
			c = w.ch,
			token = c,
			cnext;
	 
		cnext = w.nextChar();

		if (cnext === '/') {
			// inline comment in SCSS and LESS
			while (c && !(cnext === "\n" || cnext === "\r")) {
				token += cnext;
				c = cnext;
				cnext = w.nextChar();
			}
		} else if (cnext === '*') {
			// multiline CSS commment
			while (c && !(c === "*" && cnext === "/")) {
				token += cnext;
				c = cnext;
				cnext = w.nextChar();
			}
		} else {
			// oops, not a comment, just a /
			return tokener(token, token);
		}
		
		token += cnext;
		w.nextChar();
		tokener(token, 'comment');
	}

	function eatString() {
		var w = walker,
			c = w.ch,
			q = c,
			token = c,
			cnext;
	
		c = w.nextChar();

		while (c !== q) {
			if (c === '\n') {
				cnext = w.nextChar();
				if (cnext === "\\") {
					token += c + cnext;
				} else {
					// end of line with no \ escape = bad
					raiseError("Unterminated string");
				}
			} else {
				if (c === "\\") {
					token += c + w.nextChar();
				} else {
					token += c;
				}
			}
		
			c = w.nextChar();
		}

		token += c;

		return token;
	}

	function str() {
		var token = eatString();
		walker.nextChar();
		tokener(token, 'string');
	}
	
	function brace() {
		var w = walker,
			c = w.ch,
			depth = 1,
			token = c,
			stop = false;
	
		c = w.nextChar();
	
		while (c && !stop) {
			if (c === '(') {
				depth++;
			} else if (c === ')') {
				depth--;
				if (!depth) {
					stop = true;
				}
			} else if (c === '"' || c === "'") {
				c = eatString();
			} else if (c === '') {
				raiseError("Unterminated brace");
			}
			
			token += c;
			c = w.nextChar();
		}
		
		tokener(token, 'brace');
	}

	function identifier(pre) {
		var c = walker.ch;
		var token = pre ? pre + c : c;
			
		c = walker.nextChar();
		var cc = c.charCodeAt(0);
		while (isNameChar(c, cc) || isDigit(c, cc)) {
			token += c;
			c = walker.nextChar();
			cc = c.charCodeAt(0);
		}
	
		tokener(token, 'identifier');
	}

	function num() {
		var w = walker,
			c = w.ch,
			token = c,
			point = token === '.',
			nondigit;
		
		c = w.nextChar();
		nondigit = !isDigit(c);
	
		// .2px or .classname?
		if (point && nondigit) {
			// meh, NaN, could be a class name, so it's an operator for now
			return tokener(token, '.');    
		}
		
		// -2px or -moz-something
		if (token === '-' && nondigit) {
			return identifier('-');
		}
	
		while (c !== '' && (isDigit(c) || (!point && c === '.'))) { // not end of source && digit or first instance of .
			if (c === '.') {
				point = true;
			}
			token += c;
			c = w.nextChar();
		}

		tokener(token, 'number');    
	
	}

	function op() {
		var w = walker,
			c = w.ch,
			token = c,
			next = w.nextChar();
			
		if (next === "=" && isOp(token, true)) {
			token += next;
			tokener(token, 'match');
			w.nextChar();
			return;
		} 
		
		tokener(token, token);
	}


	// call the appropriate handler based on the first character in a token suspect
	function tokenize() {
		var ch = walker.ch;
	
		if (ch === " " || ch === "\t") {
			return white();
		}

		if (ch === '/') {
			return comment();
		} 

		if (ch === '"' || ch === "'") {
			return str();
		}
		
		if (ch === '(') {
			return brace();
		}
	
		if (ch === '-' || ch === '.' || isDigit(ch)) { // tricky - char: minus (-1px) or dash (-moz-stuff)
			return num();
		}
	
		if (isNameChar(ch)) {
			return identifier();
		}

		if (isOp(ch)) {
			return op();
		}

		if (ch === '\r') {
			if (walker.peek() === '\n') {
				ch += walker.nextChar();
			}

			tokener(ch, 'line');
			walker.nextChar();
			return;
		}
		
		if (ch === '\n') {
			tokener(ch, 'line');
			walker.nextChar();
			return;
		}
		
		raiseError("Unrecognized character '" + ch + "'");
	}

	return {
		/**
		 * Sprits given source into tokens
		 * @param {String} source
		 * @returns {Array}
		 */
		lex: function (source) {
			walker.init(source);
			session.tokens = [];

			// for empty source, return single space token
			if (!source) {
				session.tokens.push(this.white());
			} else {
				while (walker.ch !== '') {
					tokenize();
				}
			}

			var tokens = session.tokens;
			session.tokens = null;
			return tokens;
		},
		
		/**
		 * Tokenizes CSS source. It's like `lex()` method,
		 * but also stores proper token indexes in source, 
		 * so it's a bit slower
		 * @param {String} source
		 * @returns {Array}
		 */
		parse: function(source) {
			// transform tokens
			var tokens = this.lex(source), pos = 0, token;
			for (var i = 0, il = tokens.length; i < il; i++) {
				token = tokens[i];
				token.start = pos;
				token.end = (pos += token.value.length);
			}
			return tokens;
		},

		white: function() {
			return {
				value: '',
				type:  'white',
				start: 0,
				end:   0
			};
		},
		
		toSource: function(toks) {
			var i = 0, max = toks.length, src = '';
			for (; i < max; i++) {
				src += toks[i].value;
			}
			return src;
		}
	};
});
/**
 * HTML matcher: takes string and searches for HTML tag pairs for given position 
 * 
 * Unlike “classic” matchers, it parses content from the specified 
 * position, not from the start, so it may work even outside HTML documents
 * (for example, inside strings of programming languages like JavaScript, Python 
 * etc.)
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/htmlMatcher',['require','exports','module','./range'],function(require, exports, module) {
	var range = require('./range');

	// Regular Expressions for parsing tags and attributes
	var reOpenTag = /^<([\w\:\-]+)((?:\s+[\w\-:]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/;
	var reCloseTag = /^<\/([\w\:\-]+)[^>]*>/;

	function openTag(i, match) {
		return {
			name: match[1],
			selfClose: !!match[3],
			/** @type Range */
			range: range(i, match[0]),
			type: 'open'
		};
	}
	
	function closeTag(i, match) {
		return {
			name: match[1],
			/** @type Range */
			range: range(i, match[0]),
			type: 'close'
		};
	}
	
	function comment(i, match) {
		return {
			/** @type Range */
			range: range(i, typeof match == 'number' ? match - i : match[0]),
			type: 'comment'
		};
	}
	
	/**
	 * Creates new tag matcher session
	 * @param {String} text
	 */
	function createMatcher(text) {
		var memo = {}, m;
		return {
			/**
			 * Test if given position matches opening tag
			 * @param {Number} i
			 * @returns {Object} Matched tag object
			 */
			open: function(i) {
				var m = this.matches(i);
				return m && m.type == 'open' ? m : null;
			},
			
			/**
			 * Test if given position matches closing tag
			 * @param {Number} i
			 * @returns {Object} Matched tag object
			 */
			close: function(i) {
				var m = this.matches(i);
				return m && m.type == 'close' ? m : null;
			},
			
			/**
			 * Matches either opening or closing tag for given position
			 * @param i
			 * @returns
			 */
			matches: function(i) {
				var key = 'p' + i;
				
				if (!(key in memo)) {
					memo[key] = false;
					if (text.charAt(i) == '<') {
						var substr = text.slice(i);
						if ((m = substr.match(reOpenTag))) {
							memo[key] = openTag(i, m);
						} else if ((m = substr.match(reCloseTag))) {
							memo[key] = closeTag(i, m);
						}
					}
				}
				
				return memo[key];
			},
			
			/**
			 * Returns original text
			 * @returns {String}
			 */
			text: function() {
				return text;
			},

			clean: function() {
				memo = text = m = null;
			}
		};
	}
	
	function matches(text, pos, pattern) {
		return text.substring(pos, pos + pattern.length) == pattern;
	}
	
	/**
	 * Search for closing pair of opening tag
	 * @param {Object} open Open tag instance
	 * @param {Object} matcher Matcher instance
	 */
	function findClosingPair(open, matcher) {
		var stack = [], tag = null;
		var text = matcher.text();
		
		for (var pos = open.range.end, len = text.length; pos < len; pos++) {
			if (matches(text, pos, '<!--')) {
				// skip to end of comment
				for (var j = pos; j < len; j++) {
					if (matches(text, j, '-->')) {
						pos = j + 3;
						break;
					}
				}
			}
			
			if ((tag = matcher.matches(pos))) {
				if (tag.type == 'open' && !tag.selfClose) {
					stack.push(tag.name);
				} else if (tag.type == 'close') {
					if (!stack.length) { // found valid pair?
						return tag.name == open.name ? tag : null;
					}
					
					// check if current closing tag matches previously opened one
					if (stack[stack.length - 1] == tag.name) {
						stack.pop();
					} else {
						var found = false;
						while (stack.length && !found) {
							var last = stack.pop();
							if (last == tag.name) {
								found = true;
							}
						}
						
						if (!stack.length && !found) {
							return tag.name == open.name ? tag : null;
						}
					}
				}

				pos = tag.range.end - 1;
			}
		}
	}
	
	return {
		/**
		 * Main function: search for tag pair in <code>text</code> for given 
		 * position
		 * @memberOf htmlMatcher
		 * @param {String} text 
		 * @param {Number} pos
		 * @returns {Object}
		 */
		find: function(text, pos) {
			var matcher = createMatcher(text); 
			var open = null, close = null;
			var j, jl;
			
			for (var i = pos; i >= 0; i--) {
				if ((open = matcher.open(i))) {
					// found opening tag
					if (open.selfClose) {
						if (open.range.cmp(pos, 'lt', 'gt')) {
							// inside self-closing tag, found match
							break;
						}
						
						// outside self-closing tag, continue
						continue;
					}
					
					close = findClosingPair(open, matcher);
					if (close) {
						// found closing tag.
						var r = range.create2(open.range.start, close.range.end);
						if (r.contains(pos)) {
							break;
						}
					} else if (open.range.contains(pos)) {
						// we inside empty HTML tag like <br>
						break;
					}
					
					open = null;
				} else if (matches(text, i, '-->')) {
					// skip back to comment start
					for (j = i - 1; j >= 0; j--) {
						if (matches(text, j, '-->')) {
							// found another comment end, do nothing
							break;
						} else if (matches(text, j, '<!--')) {
							i = j;
							break;
						}
					}
				} else if (matches(text, i, '<!--')) {
					// we're inside comment, match it
					for (j = i + 4, jl = text.length; j < jl; j++) {
						if (matches(text, j, '-->')) {
							j += 3;
							break;
						}
					}
					
					open = comment(i, j);
					break;
				}
			}
			
			matcher.clean();

			if (open) {
				var outerRange = null;
				var innerRange = null;
				
				if (close) {
					outerRange = range.create2(open.range.start, close.range.end);
					innerRange = range.create2(open.range.end, close.range.start);
				} else {
					outerRange = innerRange = range.create2(open.range.start, open.range.end);
				}
				
				if (open.type == 'comment') {
					// adjust positions of inner range for comment
					var _c = outerRange.substring(text);
					innerRange.start += _c.length - _c.replace(/^<\!--\s*/, '').length;
					innerRange.end -= _c.length - _c.replace(/\s*-->$/, '').length;
				}
				
				return {
					open: open,
					close: close,
					type: open.type == 'comment' ? 'comment' : 'tag',
					innerRange: innerRange,
					innerContent: function() {
						return this.innerRange.substring(text);
					},
					outerRange: outerRange,
					outerContent: function() {
						return this.outerRange.substring(text);
					},
					range: !innerRange.length() || !innerRange.cmp(pos, 'lte', 'gte') ? outerRange : innerRange,
					content: function() {
						return this.range.substring(text);
					},
					source: text
				};
			}
		},
		
		/**
		 * The same as <code>find()</code> method, but restricts matched result 
		 * to <code>tag</code> type
		 * @param {String} text 
		 * @param {Number} pos
		 * @returns {Object}
		 */
		tag: function(text, pos) {
			var result = this.find(text, pos);
			if (result && result.type == 'tag') {
				return result;
			}
		}
	};
});
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('vendor/klass',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');

	/**
	 * Shared empty constructor function to aid in prototype-chain creation.
	 */
	var ctor = function(){};

	/**
	 * Helper function to correctly set up the prototype chain, for subclasses.
	 * Similar to `goog.inherits`, but uses a hash of prototype properties and
	 * class properties to be extended.
	 * Took it from Backbone.
	 * @param {Object} parent
	 * @param {Object} protoProps
	 * @param {Object} staticProps
	 * @returns {Object}
	 */
	function inherits(parent, protoProps, staticProps) {
		var child;

		// The constructor function for the new subclass is either defined by
		// you (the "constructor" property in your `extend` definition), or
		// defaulted by us to simply call the parent's constructor.
		if (protoProps && protoProps.hasOwnProperty('constructor')) {
			child = protoProps.constructor;
		} else {
			child = function() {
				parent.apply(this, arguments);
			};
		}

		// Inherit class (static) properties from parent.
		_.extend(child, parent);

		// Set the prototype chain to inherit from `parent`, without calling
		// `parent`'s constructor function.
		ctor.prototype = parent.prototype;
		child.prototype = new ctor();

		// Add prototype properties (instance properties) to the subclass,
		// if supplied.
		if (protoProps)
			_.extend(child.prototype, protoProps);

		// Add static properties to the constructor function, if supplied.
		if (staticProps)
			_.extend(child, staticProps);

		// Correctly set child's `prototype.constructor`.
		child.prototype.constructor = child;

		// Set a convenience property in case the parent's prototype is needed
		// later.
		child.__super__ = parent.prototype;

		return child;
	}

	return {
		/**
		 * The self-propagating extend function for classes.
		 * Took it from Backbone 
		 * @param {Object} protoProps
		 * @param {Object} classProps
		 * @returns {Object}
		 */
		extend: function(protoProps, classProps) {
			var child = inherits(this, protoProps, classProps);
			child.extend = this.extend;
			// a hack required to WSH inherit `toString` method
			if (protoProps.hasOwnProperty('toString'))
				child.prototype.toString = protoProps.toString;
			return child;
		}
	};
});
/**
 * Abstract implementation of edit tree interface.
 * Edit tree is a named container of editable “name-value” child elements, 
 * parsed from <code>source</code>. This container provides convenient methods
 * for editing/adding/removing child elements. All these update actions are
 * instantly reflected in the <code>source</code> code with respect of formatting.
 * <br><br>
 * For example, developer can create an edit tree from CSS rule and add or 
 * remove properties from it–all changes will be immediately reflected in the 
 * original source.
 * <br><br>
 * All classes defined in this module should be extended the same way as in
 * Backbone framework: using <code>extend</code> method to create new class and 
 * <code>initialize</code> method to define custom class constructor.
 * 
 * @example
 * <pre><code>
 * var MyClass = require('editTree/base').EditElement.extend({
 *     initialize: function() {
 *     // constructor code here
 *   }
 * });
 * 
 * var elem = new MyClass(); 
 * </code></pre>
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('editTree/base',['require','exports','module','lodash','../assets/range','../utils/common','../vendor/klass'],function(require, exports, module) {
	var _ = require('lodash');
	var range = require('../assets/range');
	var utils = require('../utils/common');
	var klass = require('../vendor/klass');
	
	/**
	 * Named container of edited source
	 * @type EditContainer
	 * @param {String} source
	 * @param {Object} options
	 */
	function EditContainer(source, options) {
		this.options = _.extend({offset: 0}, options);
		/**
		 * Source code of edited structure. All changes in the structure are 
		 * immediately reflected into this property
		 */
		this.source = source;
		
		/** 
		 * List of all editable children
		 * @private 
		 */
		this._children = [];
		
		/**
		 * Hash of all positions of container
		 * @private
		 */
		this._positions = {
			name: 0
		};
		
		this.initialize.apply(this, arguments);
	}
	
	/**
	 * The self-propagating extend function for classes.
	 * @type Function
	 */
	EditContainer.extend = klass.extend;
	
	EditContainer.prototype = {
		type: 'container',
		/**
		 * Child class constructor
		 */
		initialize: function() {},

		/**
		 * Make position absolute
		 * @private
		 * @param {Number} num
		 * @param {Boolean} isAbsolute
		 * @returns {Boolean}
		 */
		_pos: function(num, isAbsolute) {
			return num + (isAbsolute ? this.options.offset : 0);
		},
		
		/**
		 * Replace substring of tag's source
		 * @param {String} value
		 * @param {Number} start
		 * @param {Number} end
		 * @private
		 */
		_updateSource: function(value, start, end) {
			// create modification range
			var r = range.create(start, _.isUndefined(end) ? 0 : end - start);
			var delta = value.length - r.length();
			
			var update = function(obj) {
				_.each(obj, function(v, k) {
					if (v >= r.end)
						obj[k] += delta;
				});
			};
			
			// update affected positions of current container
			update(this._positions);
			
			// update affected positions of children
			var recursiveUpdate = function(items) {
				_.each(items, function(item) {
					update(item._positions);
					if (item.type == 'container') {
						recursiveUpdate(item.list());
					}
				});
			};

			recursiveUpdate(this.list());
			this.source = utils.replaceSubstring(this.source, value, r);
		},
			
			
		/**
		 * Adds new attribute 
		 * @param {String} name Property name
		 * @param {String} value Property value
		 * @param {Number} pos Position at which to insert new property. By 
		 * default the property is inserted at the end of rule 
		 * @returns {EditElement} Newly created element
		 */
		add: function(name, value, pos) {
			// this is abstract implementation
			var item = new EditElement(name, value);
			this._children.push(item);
			return item;
		},
		
		/**
		 * Returns attribute object
		 * @param {String} name Attribute name or its index
		 * @returns {EditElement}
		 */
		get: function(name) {
			if (_.isNumber(name))
				return this.list()[name];
			
			if (_.isString(name))
				return _.find(this.list(), function(prop) {
					return prop.name() === name;
				});
			
			return name;
		},
		
		/**
		 * Returns all children by name or indexes
		 * @param {Object} name Element name(s) or indexes (<code>String</code>,
		 * <code>Array</code>, <code>Number</code>)
		 * @returns {Array}
		 */
		getAll: function(name) {
			if (!_.isArray(name))
				name = [name];
			
			// split names and indexes
			var names = [], indexes = [];
			_.each(name, function(item) {
				if (_.isString(item))
					names.push(item);
				else if (_.isNumber(item))
					indexes.push(item);
			});
			
			return _.filter(this.list(), function(attribute, i) {
				return _.include(indexes, i) || _.include(names, attribute.name());
			});
		},

		/**
		 * Returns list of all editable child elements
		 * @returns {Array}
		 */
		list: function() {
			return this._children;
		},

		/**
		 * Remove child element
		 * @param {String} name Property name or its index
		 */
		remove: function(name) {
			var element = this.get(name);
			if (element) {
				this._updateSource('', element.fullRange());
				this._children = _.without(this._children, element);
			}
		},
		
		/**
		 * Returns index of editble child in list
		 * @param {Object} item
		 * @returns {Number}
		 */
		indexOf: function(item) {
			return _.indexOf(this.list(), this.get(item));
		},
		
		/**
		 * Returns or updates element value. If such element doesn't exists,
		 * it will be created automatically and added at the end of child list.
		 * @param {String} name Element name or its index
		 * @param {String} value New element value
		 * @returns {String}
		 */
		value: function(name, value, pos) {
			var element = this.get(name);
			if (element)
				return element.value(value);
			
			if (!_.isUndefined(value)) {
				// no such element — create it
				return this.add(name, value, pos);
			}
		},
		
		/**
		 * Returns all values of child elements found by <code>getAll()</code>
		 * method
		 * @param {Object} name Element name(s) or indexes (<code>String</code>,
		 * <code>Array</code>, <code>Number</code>)
		 * @returns {Array}
		 */
		values: function(name) {
			return _.map(this.getAll(name), function(element) {
				return element.value();
			});
		},
		
		/**
		 * Sets or gets container name
		 * @param {String} val New name. If not passed, current 
		 * name is returned
		 * @return {String}
		 */
		name: function(val) {
			if (!_.isUndefined(val) && this._name !== (val = String(val))) {
				this._updateSource(val, this._positions.name, this._positions.name + this._name.length);
				this._name = val;
			}
			
			return this._name;
		},
		
		/**
		 * Returns name range object
		 * @param {Boolean} isAbsolute Return absolute range (with respect of 
		 * rule offset)
		 * @returns {Range}
		 */
		nameRange: function(isAbsolute) {
			return range.create(this._positions.name + (isAbsolute ? this.options.offset : 0), this.name());
		},

		/**
		 * Returns range of current source
		 * @param {Boolean} isAbsolute
		 */
		range: function(isAbsolute) {
			return range.create(isAbsolute ? this.options.offset : 0, this.valueOf());
		},
		
		/**
		 * Returns element that belongs to specified position
		 * @param {Number} pos
		 * @param {Boolean} isAbsolute
		 * @returns {EditElement}
		 */
		itemFromPosition: function(pos, isAbsolute) {
			return _.find(this.list(), function(elem) {
				return elem.range(isAbsolute).inside(pos);
			});
		},
		
		/**
		 * Returns source code of current container 
		 * @returns {String}
		 */
		toString: function() {
			return this.valueOf();
		},

		valueOf: function() {
			return this.source;
		}
	};
	
	/**
	 * @param {EditContainer} parent
	 * @param {Object} nameToken
	 * @param {Object} valueToken
	 */
	function EditElement(parent, nameToken, valueToken) {
		/** @type EditContainer */
		this.parent = parent;
		
		this._name = nameToken.value;
		this._value = valueToken ? valueToken.value : '';
		
		this._positions = {
			name: nameToken.start,
			value: valueToken ? valueToken.start : -1
		};
		
		this.initialize.apply(this, arguments);
	}
	
	/**
	 * The self-propagating extend function for classes.
	 * @type Function
	 */
	EditElement.extend = klass.extend;
	
	EditElement.prototype = {
		type: 'element',

		/**
		 * Child class constructor
		 */
		initialize: function() {},
		
		/**
		 * Make position absolute
		 * @private
		 * @param {Number} num
		 * @param {Boolean} isAbsolute
		 * @returns {Boolean}
		 */
		_pos: function(num, isAbsolute) {
			return num + (isAbsolute ? this.parent.options.offset : 0);
		},
			
		/**
		 * Sets of gets element value
		 * @param {String} val New element value. If not passed, current 
		 * value is returned
		 * @returns {String}
		 */
		value: function(val) {
			if (!_.isUndefined(val) && this._value !== (val = String(val))) {
				this.parent._updateSource(val, this.valueRange());
				this._value = val;
			}
			
			return this._value;
		},
		
		/**
		 * Sets of gets element name
		 * @param {String} val New element name. If not passed, current 
		 * name is returned
		 * @returns {String}
		 */
		name: function(val) {
			if (!_.isUndefined(val) && this._name !== (val = String(val))) {
				this.parent._updateSource(val, this.nameRange());
				this._name = val;
			}
			
			return this._name;
		},
		
		/**
		 * Returns position of element name token
		 * @param {Boolean} isAbsolute Return absolute position
		 * @returns {Number}
		 */
		namePosition: function(isAbsolute) {
			return this._pos(this._positions.name, isAbsolute);
		},
		
		/**
		 * Returns position of element value token
		 * @param {Boolean} isAbsolute Return absolute position
		 * @returns {Number}
		 */
		valuePosition: function(isAbsolute) {
			return this._pos(this._positions.value, isAbsolute);
		},
		
		/**
		 * Returns element name
		 * @param {Boolean} isAbsolute Return absolute range 
		 * @returns {Range}
		 */
		range: function(isAbsolute) {
			return range.create(this.namePosition(isAbsolute), this.valueOf());
		},
		
		/**
		 * Returns full element range, including possible indentation
		 * @param {Boolean} isAbsolute Return absolute range
		 * @returns {Range}
		 */
		fullRange: function(isAbsolute) {
			return this.range(isAbsolute);
		},
		
		/**
		 * Returns element name range
		 * @param {Boolean} isAbsolute Return absolute range
		 * @returns {Range}
		 */
		nameRange: function(isAbsolute) {
			return range.create(this.namePosition(isAbsolute), this.name());
		},
		
		/**
		 * Returns element value range
		 * @param {Boolean} isAbsolute Return absolute range
		 * @returns {Range}
		 */
		valueRange: function(isAbsolute) {
			return range.create(this.valuePosition(isAbsolute), this.value());
		},
		
		/**
		 * Returns current element string representation
		 * @returns {String}
		 */
		toString: function() {
			return this.valueOf();
		},
		
		valueOf: function() {
			return this.name() + this.value();
		}
	};
	
	return {
		EditContainer: EditContainer,
		EditElement: EditElement,
		
		/**
		 * Creates token that can be fed to <code>EditElement</code>
		 * @param {Number} start
		 * @param {String} value
		 * @param {String} type
		 * @returns
		 */
		createToken: function(start, value, type) {
			var obj = {
				start: start || 0,
				value: value || '',
				type: type
			};
			
			obj.end = obj.start + obj.value.length;
			return obj;
		}
	};
});
/**
 * HTML tokenizer by Marijn Haverbeke
 * http://codemirror.net/
 * @constructor
 * @memberOf __xmlParseDefine
 * @param {Function} require
 * @param {Underscore} _
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/xml',['require','exports','module','lodash','../assets/stringStream'],function(require, exports, module) {
	var _ = require('lodash');
	var stringStream = require('../assets/stringStream');

	var Kludges = {
		autoSelfClosers : {},
		implicitlyClosed : {},
		contextGrabbers : {},
		doNotIndent : {},
		allowUnquoted : true,
		allowMissing : true
	};

	// Return variables for tokenizers
	var tagName = null, type = null;

	function inText(stream, state) {
		function chain(parser) {
			state.tokenize = parser;
			return parser(stream, state);
		}

		var ch = stream.next();
		if (ch == "<") {
			if (stream.eat("!")) {
				if (stream.eat("[")) {
					if (stream.match("CDATA["))
						return chain(inBlock("atom", "]]>"));
					else
						return null;
				} else if (stream.match("--"))
					return chain(inBlock("comment", "-->"));
				else if (stream.match("DOCTYPE", true, true)) {
					stream.eatWhile(/[\w\._\-]/);
					return chain(doctype(1));
				} else
					return null;
			} else if (stream.eat("?")) {
				stream.eatWhile(/[\w\._\-]/);
				state.tokenize = inBlock("meta", "?>");
				return "meta";
			} else {
				type = stream.eat("/") ? "closeTag" : "openTag";
				stream.eatSpace();
				tagName = "";
				var c;
				while ((c = stream.eat(/[^\s\u00a0=<>\"\'\/?]/)))
					tagName += c;
				state.tokenize = inTag;
				return "tag";
			}
		} else if (ch == "&") {
			var ok;
			if (stream.eat("#")) {
				if (stream.eat("x")) {
					ok = stream.eatWhile(/[a-fA-F\d]/) && stream.eat(";");
				} else {
					ok = stream.eatWhile(/[\d]/) && stream.eat(";");
				}
			} else {
				ok = stream.eatWhile(/[\w\.\-:]/) && stream.eat(";");
			}
			return ok ? "atom" : "error";
		} else {
			stream.eatWhile(/[^&<]/);
			return "text";
		}
	}

	function inTag(stream, state) {
		var ch = stream.next();
		if (ch == ">" || (ch == "/" && stream.eat(">"))) {
			state.tokenize = inText;
			type = ch == ">" ? "endTag" : "selfcloseTag";
			return "tag";
		} else if (ch == "=") {
			type = "equals";
			return null;
		} else if (/[\'\"]/.test(ch)) {
			state.tokenize = inAttribute(ch);
			return state.tokenize(stream, state);
		} else {
			stream.eatWhile(/[^\s\u00a0=<>\"\'\/?]/);
			return "word";
		}
	}

	function inAttribute(quote) {
		return function(stream, state) {
			while (!stream.eol()) {
				if (stream.next() == quote) {
					state.tokenize = inTag;
					break;
				}
			}
			return "string";
		};
	}

	function inBlock(style, terminator) {
		return function(stream, state) {
			while (!stream.eol()) {
				if (stream.match(terminator)) {
					state.tokenize = inText;
					break;
				}
				stream.next();
			}
			return style;
		};
	}
	
	function doctype(depth) {
		return function(stream, state) {
			var ch;
			while ((ch = stream.next()) !== null) {
				if (ch == "<") {
					state.tokenize = doctype(depth + 1);
					return state.tokenize(stream, state);
				} else if (ch == ">") {
					if (depth == 1) {
						state.tokenize = inText;
						break;
					} else {
						state.tokenize = doctype(depth - 1);
						return state.tokenize(stream, state);
					}
				}
			}
			return "meta";
		};
	}

	var curState = null, setStyle;
	function pass() {
		for (var i = arguments.length - 1; i >= 0; i--)
			curState.cc.push(arguments[i]);
	}
	
	function cont() {
		pass.apply(null, arguments);
		return true;
	}

	function pushContext(tagName, startOfLine) {
		var noIndent = Kludges.doNotIndent.hasOwnProperty(tagName) 
			|| (curState.context && curState.context.noIndent);
		curState.context = {
			prev : curState.context,
			tagName : tagName,
			indent : curState.indented,
			startOfLine : startOfLine,
			noIndent : noIndent
		};
	}
	
	function popContext() {
		if (curState.context)
			curState.context = curState.context.prev;
	}

	function element(type) {
		if (type == "openTag") {
			curState.tagName = tagName;
			return cont(attributes, endtag(curState.startOfLine));
		} else if (type == "closeTag") {
			var err = false;
			if (curState.context) {
				if (curState.context.tagName != tagName) {
					if (Kludges.implicitlyClosed.hasOwnProperty(curState.context.tagName.toLowerCase())) {
						popContext();
					}
					err = !curState.context || curState.context.tagName != tagName;
				}
			} else {
				err = true;
			}
			
			if (err)
				setStyle = "error";
			return cont(endclosetag(err));
		}
		return cont();
	}
	
	function endtag(startOfLine) {
		return function(type) {
			if (type == "selfcloseTag"
					|| (type == "endTag" && Kludges.autoSelfClosers
							.hasOwnProperty(curState.tagName
									.toLowerCase()))) {
				maybePopContext(curState.tagName.toLowerCase());
				return cont();
			}
			if (type == "endTag") {
				maybePopContext(curState.tagName.toLowerCase());
				pushContext(curState.tagName, startOfLine);
				return cont();
			}
			return cont();
		};
	}
	
	function endclosetag(err) {
		return function(type) {
			if (err)
				setStyle = "error";
			if (type == "endTag") {
				popContext();
				return cont();
			}
			setStyle = "error";
			return cont(arguments.callee);
		};
	}
	
	function maybePopContext(nextTagName) {
		var parentTagName;
		while (true) {
			if (!curState.context) {
				return;
			}
			parentTagName = curState.context.tagName.toLowerCase();
			if (!Kludges.contextGrabbers.hasOwnProperty(parentTagName)
					|| !Kludges.contextGrabbers[parentTagName].hasOwnProperty(nextTagName)) {
				return;
			}
			popContext();
		}
	}

	function attributes(type) {
		if (type == "word") {
			setStyle = "attribute";
			return cont(attribute, attributes);
		}
		if (type == "endTag" || type == "selfcloseTag")
			return pass();
		setStyle = "error";
		return cont(attributes);
	}
	
	function attribute(type) {
		if (type == "equals")
			return cont(attvalue, attributes);
		if (!Kludges.allowMissing)
			setStyle = "error";
		return (type == "endTag" || type == "selfcloseTag") ? pass()
				: cont();
	}
	
	function attvalue(type) {
		if (type == "string")
			return cont(attvaluemaybe);
		if (type == "word" && Kludges.allowUnquoted) {
			setStyle = "string";
			return cont();
		}
		setStyle = "error";
		return (type == "endTag" || type == "selfCloseTag") ? pass()
				: cont();
	}
	
	function attvaluemaybe(type) {
		if (type == "string")
			return cont(attvaluemaybe);
		else
			return pass();
	}
	
	function startState() {
		return {
			tokenize : inText,
			cc : [],
			indented : 0,
			startOfLine : true,
			tagName : null,
			context : null
		};
	}
	
	function token(stream, state) {
		if (stream.sol()) {
			state.startOfLine = true;
			state.indented = 0;
		}
		
		if (stream.eatSpace())
			return null;

		setStyle = type = tagName = null;
		var style = state.tokenize(stream, state);
		state.type = type;
		if ((style || type) && style != "comment") {
			curState = state;
			while (true) {
				var comb = state.cc.pop() || element;
				if (comb(type || style))
					break;
			}
		}
		state.startOfLine = false;
		return setStyle || style;
	}

	return {
		/**
		 * @memberOf emmet.xmlParser
		 * @returns
		 */
		parse: function(data, offset) {
			offset = offset || 0;
			var state = startState();
			var stream = stringStream.create(data);
			var tokens = [];
			while (!stream.eol()) {
				tokens.push({
					type: token(stream, state),
					start: stream.start + offset,
					end: stream.pos + offset
				});
				stream.start = stream.pos;
			}
			
			return tokens;
		}		
	};
});

/**
 * XML EditTree is a module that can parse an XML/HTML element into a tree with 
 * convenient methods for adding, modifying and removing attributes. These 
 * changes can be written back to string with respect of code formatting.
 * 
 * @memberOf __xmlEditTreeDefine
 * @constructor
 * @param {Function} require
 * @param {Underscore} _ 
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('editTree/xml',['require','exports','module','lodash','./base','../parser/xml','../assets/range','../utils/common'],function(require, exports, module) {
	var _ = require('lodash');
	var editTree = require('./base');
	var xmlParser = require('../parser/xml');
	var range = require('../assets/range');
	var utils = require('../utils/common');

	var defaultOptions = {
		styleBefore: ' ',
		styleSeparator: '=',
		styleQuote: '"',
		offset: 0
	};
	
	var startTag = /^<([\w\:\-]+)((?:\s+[\w\-:]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/m;
	
	var XMLEditContainer = editTree.EditContainer.extend({
		initialize: function(source, options) {
			_.defaults(this.options, defaultOptions);
			this._positions.name = 1;
			
			var attrToken = null;
			var tokens = xmlParser.parse(source);
			
			_.each(tokens, function(token) {
				token.value = range.create(token).substring(source);
				switch (token.type) {
					case 'tag':
						if (/^<[^\/]+/.test(token.value)) {
							this._name = token.value.substring(1);
						}
						break;
						
					case 'attribute':
						// add empty attribute
						if (attrToken) {
							this._children.push(new XMLEditElement(this, attrToken));
						}
						
						attrToken = token;
						break;
						
					case 'string':
						this._children.push(new XMLEditElement(this, attrToken, token));
						attrToken = null;
						break;
				}
			}, this);
			
			if (attrToken) {
				this._children.push(new XMLEditElement(this, attrToken));
			}
			
			this._saveStyle();
		},
		
		/**
		 * Remembers all styles of properties
		 * @private
		 */
		_saveStyle: function() {
			var start = this.nameRange().end;
			var source = this.source;
			
			_.each(this.list(), /** @param {EditElement} p */ function(p) {
				p.styleBefore = source.substring(start, p.namePosition());
				
				if (p.valuePosition() !== -1) {
					p.styleSeparator = source.substring(p.namePosition() + p.name().length, p.valuePosition() - p.styleQuote.length);
				}
				
				start = p.range().end;
			});
		},
		
		/**
		 * Adds new attribute 
		 * @param {String} name Property name
		 * @param {String} value Property value
		 * @param {Number} pos Position at which to insert new property. By 
		 * default the property is inserted at the end of rule 
		 */
		add: function(name, value, pos) {
			var list = this.list();
			var start = this.nameRange().end;
			var styles = _.pick(this.options, 'styleBefore', 'styleSeparator', 'styleQuote');
			
			if (_.isUndefined(pos))
				pos = list.length;
			
			
			/** @type XMLEditAttribute */
			var donor = list[pos];
			if (donor) {
				start = donor.fullRange().start;
			} else if ((donor = list[pos - 1])) {
				start = donor.range().end;
			}
			
			if (donor) {
				styles = _.pick(donor, 'styleBefore', 'styleSeparator', 'styleQuote');
			}
			
			value = styles.styleQuote + value + styles.styleQuote;
			
			var attribute = new XMLEditElement(this, 
					editTree.createToken(start + styles.styleBefore.length, name),
					editTree.createToken(start + styles.styleBefore.length + name.length 
							+ styles.styleSeparator.length, value)
					);
			
			_.extend(attribute, styles);
			
			// write new attribute into the source
			this._updateSource(attribute.styleBefore + attribute.toString(), start);
			
			// insert new attribute
			this._children.splice(pos, 0, attribute);
			return attribute;
		},

		/**
		 * A special case of attribute editing: adds class value to existing
		 * `class` attribute
		 * @param {String} value
		 */
		addClass: function(value) {
			var attr = this.get('class');
			value = utils.trim(value);
			if (!attr) {
				return this.add('class', value);
			}

			var classVal = attr.value();
			var classList = ' ' + classVal.replace(/\n/g, ' ') + ' ';
			if (!~classList.indexOf(' ' + value + ' ')) {
				attr.value(classVal + ' ' + value);
			}
		},

		/**
		 * A special case of attribute editing: removes class value from existing
		 * `class` attribute
		 * @param {String} value
		 */
		removeClass: function(value) {
			var attr = this.get('class');
			value = utils.trim(value);
			if (!attr) {
				return;
			}

			var reClass = new RegExp('(^|\\s+)' + utils.escapeForRegexp(value));
			var classVal = attr.value().replace(reClass, '');
			if (!utils.trim(classVal)) {
				this.remove('class');
			} else {
				attr.value(classVal);
			}
		}
	});
	
	var XMLEditElement = editTree.EditElement.extend({
		initialize: function(parent, nameToken, valueToken) {
			this.styleBefore = parent.options.styleBefore;
			this.styleSeparator = parent.options.styleSeparator;
			
			var value = '', quote = parent.options.styleQuote;
			if (valueToken) {
				value = valueToken.value;
				quote = value.charAt(0);
				if (quote == '"' || quote == "'") {
					value = value.substring(1);
				} else {
					quote = '';
				}
				
				if (quote && value.charAt(value.length - 1) == quote) {
					value = value.substring(0, value.length - 1);
				}
			}
			
			this.styleQuote = quote;
			
			this._value = value;
			this._positions.value = valueToken ? valueToken.start + quote.length : -1;
		},
		
		/**
		 * Returns full rule range, with indentation
		 * @param {Boolean} isAbsolute Return absolute range (with respect of
		 * rule offset)
		 * @returns {Range}
		 */
		fullRange: function(isAbsolute) {
			var r = this.range(isAbsolute);
			r.start -= this.styleBefore.length;
			return r;
		},
		
		valueOf: function() {
			return this.name() + this.styleSeparator
				+ this.styleQuote + this.value() + this.styleQuote;
		}
	});
	
	return {
		/**
		 * Parses HTML element into editable tree
		 * @param {String} source
		 * @param {Object} options
		 * @memberOf emmet.htmlEditTree
		 * @returns {EditContainer}
		 */
		parse: function(source, options) {
			return new XMLEditContainer(source, options);
		},
		
		/**
		 * Extract and parse HTML from specified position in <code>content</code> 
		 * @param {String} content CSS source code
		 * @param {Number} pos Character position where to start source code extraction
		 * @returns {XMLEditElement}
		 */
		parseFromPosition: function(content, pos, isBackward) {
			var bounds = this.extractTag(content, pos, isBackward);
			if (!bounds || !bounds.inside(pos))
				// no matching HTML tag or caret outside tag bounds
				return null;
			
			return this.parse(bounds.substring(content), {
				offset: bounds.start
			});
		},
		
		/**
		 * Extracts nearest HTML tag range from <code>content</code>, starting at 
		 * <code>pos</code> position
		 * @param {String} content
		 * @param {Number} pos
		 * @param {Boolean} isBackward
		 * @returns {Range}
		 */
		extractTag: function(content, pos, isBackward) {
			var len = content.length, i;
			
			// max extraction length. I don't think there may be tags larger 
			// than 2000 characters length
			var maxLen = Math.min(2000, len);
			
			/** @type Range */
			var r = null;
			
			var match = function(pos) {
				var m;
				if (content.charAt(pos) == '<' && (m = content.substr(pos, maxLen).match(startTag)))
					return range.create(pos, m[0]);
			};
			
			// lookup backward, in case we are inside tag already
			for (i = pos; i >= 0; i--) {
				if ((r = match(i))) break;
			}
			
			if (r && (r.inside(pos) || isBackward))
				return r;
			
			if (!r && isBackward)
				return null;
			
			// search forward
			for (i = pos; i < len; i++) {
				if ((r = match(i)))
					return r;
			}
		}
	};
});
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/cssSections',['require','exports','module','lodash','./common','./comments','../assets/range','../assets/stringStream','../parser/css','../assets/htmlMatcher','../editTree/xml'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('./common');
	var commentsUtils = require('./comments');
	var range = require('../assets/range');
	var stringStream = require('../assets/stringStream');
	var cssParser = require('../parser/css');
	var htmlMatcher = require('../assets/htmlMatcher');
	var xmlEditTree = require('../editTree/xml');

	var idCounter = 1;
	var maxId = 1000000;

	var reSpaceTrim = /^(\s*).+?(\s*)$/;
	var reSpace = /\s/g;
	var reComma = /,/;

	function isQuote(ch) {
		return ch == '"' || ch == "'";
	}

	function getId() {
		idCounter = (idCounter + 1) % maxId;
		return 's' + idCounter;
	}

	/**
	 * @param {Range} range Full selector range with additional
	 * properties for matching name and content (@see findAllRules())
	 * @param {String} source CSS source
	 */
	function CSSSection(rng, source) {
		this.id = getId();
		/** @type {CSSSection} */
		this.parent = null;
		/** @type {CSSSection} */
		this.nextSibling = null;
		/** @type {CSSSection} */
		this.previousSibling = null;
		this._source = source;
		this._name = null;
		this._content = null;

		/**
		 * Custom data for current nodes, used by other modules for
		 * caching etc.
		 * @type {Object}
		 */
		this._data = {};

		if (!rng && source) {
			rng = range(0, source);
		}

		this.range = rng;
		this.children = [];
	}

	CSSSection.prototype = {
		addChild: function(section) {
			if (!(section instanceof CSSSection)) {
				section = new CSSSection(section);
			}

			var lastChild = _.last(this.children);
			if (lastChild) {
				lastChild.nextSibling = section;
				section.previousSibling = lastChild;
			}
			section.parent = this;

			this.children.push(section);
			return section;
		},

		/**
		 * Returns root node
		 * @return {CSSSection}
		 */
		root: function() {
			var root = this;
			do {
				if (!root.parent) {
					return root;
				}
			} while(root = root.parent);

			return root;
		},

		/**
		 * Returns currect CSS source
		 * @return {String}
		 */
		source: function() {
			return this._source || this.root()._source;
		},

		/**
		 * Returns section name
		 * @return {String}
		 */
		name: function() {
			if (this._name === null) {
				var range = this.nameRange();
				if (range) {
					this._name = range.substring(this.source());
				}
			}

			return this._name;
		},

		/**
		 * Returns section name range
		 * @return {[type]} [description]
		 */
		nameRange: function() {
			if (this.range && '_selectorEnd' in this.range) {
				return range.create2(this.range.start, this.range._selectorEnd);
			}
		},

		/**
		 * Returns deepest child of current section (or section itself) 
		 * which includes given position.
		 * @param  {Number} pos
		 * @return {CSSSection}
		 */
		matchDeep: function(pos) {
			if (!this.range.inside(pos)) {
				return null;
			}

			for (var i = 0, il = this.children.length, m; i < il; i++) {
				m = this.children[i].matchDeep(pos);
				if (m) {
					return m;
				}
			};

			return this.parent ? this : null;
		},

		/**
		 * Returns current and all nested sections ranges
		 * @return {Array}
		 */
		allRanges: function() {
			var out = [];
			if (this.parent) {
				// add current range if it is not root node
				out.push(this.range);
			}

			_.each(this.children, function(child) {
				out = out.concat(child.allRanges());
			});

			return out;
		},

		data: function(key, value) {
			if (typeof value !== 'undefined') {
				this._data[key] = value;
			}

			return this._data[key];
		},

		stringify: function(indent) {
			indent = indent || '';
			var out = '';
			_.each(this.children, function(item) {
				out += indent + item.name().replace(/\n/g, '\\n') + '\n';
				out += item.stringify(indent + '--');
			});

			return out;
		},

		/**
		 * Returns current section’s actual content,
		 * e.g. content without nested sections
		 * @return {String} 
		 */
		content: function() {
			if (this._content !== null) {
				return this._content;
			}

			if (!this.range || !('_contentStart' in this.range)) {
				return '';
			}

			var r = range.create2(this.range._contentStart + 1, this.range.end - 1);
			var source = this.source();
			var start = r.start;
			var out = '';

			_.each(this.children, function(child) {
				out += source.substring(start, child.range.start);
				start = child.range.end;
			});

			out += source.substring(start, r.end);
			return this._content = utils.trim(out);
		}
	};

	return {
		/**
		 * Finds all CSS rules‘ ranges in given CSS source
		 * @param  {String} content CSS source
		 * @return {Array} Array of ranges
		 */
		findAllRules: function(content) {
			content = this.sanitize(content);
			var stream = stringStream(content);
			var ranges = [], matchedRanges;

			var saveRule = _.bind(function(r) {
				var selRange = this.extractSelector(content, r.start);
				var rule = range.create2(selRange.start, r.end);
				rule._selectorEnd = selRange.end;
				rule._contentStart = r.start;
				ranges.push(rule);
			}, this);

			var ch;
			while (ch = stream.next()) {
				if (isQuote(ch)) {
					if (!stream.skipString(ch)) {
						break; // unterminated string
					}

					continue;
				}

				if (ch == '{') {
					matchedRanges = this.matchBracesRanges(content, stream.pos - 1);
					_.each(matchedRanges, saveRule);

					if (matchedRanges.length) {
						stream.pos = _.last(matchedRanges).end;
						continue;
					} 
				}
			}
			
			return ranges.sort(function(a, b) {
				return a.start - b.start;
			});
		},

		/**
		 * Matches curly braces content right after given position
		 * @param  {String} content CSS content. Must not contain comments!
		 * @param  {Number} pos     Search start position
		 * @return {Range}
		 */
		matchBracesRanges: function(content, pos, sanitize) {
			if (sanitize) {
				content = this.sanitize(content);
			}

			var stream = stringStream(content);
			stream.start = stream.pos = pos;
			var stack = [], ranges = [];
			var ch;
			while (ch = stream.next()) {
				if (ch == '{') {
					stack.push(stream.pos - 1);
				} else if (ch == '}') {
					if (!stack.length) {
						throw 'Invalid source structure (check for curly braces)';
					}
					ranges.push(range.create2(stack.pop(), stream.pos));
					if (!stack.length) {
						return ranges;
					}
				} else {
					stream.skipQuoted();
				}
			}

			return ranges;
		},

		/**
		 * Extracts CSS selector from CSS document from
		 * given position. The selector is located by moving backward
		 * from given position which means that passed position
		 * must point to the end of selector 
		 * @param  {String}  content CSS source
		 * @param  {Number}  pos     Search position
		 * @param  {Boolean} sanitize Sanitize CSS source before processing.
		 * Off by default and assumes that CSS must be comment-free already
		 * (for performance)
		 * @return {Range}
		 */
		extractSelector: function(content, pos, sanitize) {
			if (sanitize) {
				content = this.sanitize(content);
			}

			var skipString = function() {
				var quote = content.charAt(pos);
				if (quote == '"' || quote == "'") {
					while (--pos >= 0) {
						if (content.charAt(pos) == quote && content.charAt(pos - 1) != '\\') {
							break;
						}
					}
					return true;
				}

				return false;
			};

			// find CSS selector
			var ch;
			var endPos = pos;
			while (--pos >= 0) {
				if (skipString()) continue;

				ch = content.charAt(pos);
				if (ch == ')') {
					// looks like it’s a preprocessor thing,
					// most likely a mixin arguments list, e.g.
					// .mixin (@arg1; @arg2) {...}
					while (--pos >= 0) {
						if (skipString()) continue;

						if (content.charAt(pos) == '(') {
							break;
						}
					}
					continue;
				}

				if (ch == '{' || ch == '}' || ch == ';') {
					pos++;
					break;
				}
			}

			if (pos < 0) {
				pos = 0;
			}
			
			var selector = content.substring(pos, endPos);

			// trim whitespace from matched selector
			var m = selector.replace(reSpace, ' ').match(reSpaceTrim);
			if (m) {
				pos += m[1].length;
				endPos -= m[2].length;
			}

			return range.create2(pos, endPos);
		},

		/**
		 * Search for nearest CSS rule/section that contains
		 * given position
		 * @param  {String} content CSS content or matched CSS rules (array of ranges)
		 * @param  {Number} pos     Search position
		 * @return {Range}
		 */
		matchEnclosingRule: function(content, pos) {
			if (_.isString(content)) {
				content = this.findAllRules(content);
			}

			var rules = _.filter(content, function(r) {
				return r.inside(pos);
			});

			return _.last(rules);
		},

		/**
		 * Locates CSS rule next or before given position
		 * @param  {String}  content    CSS content
		 * @param  {Number}  pos        Search start position
		 * @param  {Boolean} isBackward Search backward (find previous rule insteaf of next one)
		 * @return {Range}
		 */
		locateRule: function(content, pos, isBackward) {
			// possible case: editor reported that current syntax is
			// CSS, but it’s actually a HTML document (either `style` tag or attribute)
			var offset = 0;
			var subrange = this.styleTagRange(content, pos);
			if (subrange) {
				offset = subrange.start;
				pos -= subrange.start;
				content = subrange.substring(content);
			}

			var rules = this.findAllRules(content);
			var ctxRule = this.matchEnclosingRule(rules, pos);

			if (ctxRule) {
				return ctxRule.shift(offset);
			}

			for (var i = 0, il = rules.length; i < il; i++) {
				if (rules[i].start > pos) {
					return rules[isBackward ? i - 1 : i].shift(offset);
				}
			}
		},

		/**
		 * Sanitizes given CSS content: replaces content that may 
		 * interfere with parsing (comments, interpolations, etc.)
		 * with spaces. Sanitized content MUST NOT be used for
		 * editing or outputting, it just simplifies searching
		 * @param  {String} content CSS content
		 * @return {String}
		 */
		sanitize: function(content) {
			content = commentsUtils.strip(content);

			// remove preprocessor string interpolations like #{var}
			var stream = stringStream(content);
			var replaceRanges = [];
			var ch, ch2;

			while ((ch = stream.next())) {
				if (isQuote(ch)) {
					// skip string
					stream.skipString(ch)
					continue;
				} else if (ch === '#' || ch === '@') {
					ch2 = stream.peek();
					if (ch2 === '{') { // string interpolation
						stream.start = stream.pos - 1;

						if (stream.skipTo('}')) {
							stream.pos += 1;
						} else {
							throw 'Invalid string interpolation at ' + stream.start;
						}

						replaceRanges.push([stream.start, stream.pos]);
					}
				}
			}

			return utils.replaceWith(content, replaceRanges, 'a');
		},

		/**
		 * Parses and returns all sections in given CSS
		 * as tree-like structure, e.g. provides nesting
		 * info
		 * @param  {String} content CSS content
		 * @return {CSSSection}
		 */
		sectionTree: function(content) {
			var root = new CSSSection(null, content);
			var rules = this.findAllRules(content);

			// rules are sorted in order they appear in CSS source
			// so we can optimize their nesting routine
			var insert = function(range, ctx) {
				while (ctx && ctx.range) {
					if (ctx.range.contains(range)) {
						return ctx.addChild(range);
					}

					ctx = ctx.parent;
				}

				// if we are here then given range is a top-level section
				return root.addChild(range);
			};

			var ctx = root;
			_.each(rules, function(r) {
				ctx = insert(r, ctx);
			});

			return root;
		},

		/**
		 * Returns ranges for all nested sections, available in
		 * given CSS rule
		 * @param  {CSSEditContainer} rule
		 * @return {Array}
		 */
		nestedSectionsInRule: function(rule) {
			var offset = rule.valueRange(true).start;
			var nestedSections = this.findAllRules(rule.valueRange().substring(rule.source));
			_.each(nestedSections, function(section) {
				section.start += offset;
				section.end += offset;
				section._selectorEnd += offset;
				section._contentStart += offset;
			});
			return nestedSections;
		},

		styleTagRange: function(content, pos) {
			var tag = htmlMatcher.tag(content, pos);
			return tag && tag.open.name.toLowerCase() == 'style' 
				&& tag.innerRange.cmp(pos, 'lte', 'gte')
				&& tag.innerRange;
		},

		styleAttrRange: function(content, pos) {
			var tree = xmlEditTree.parseFromPosition(content, pos, true);
			if (tree) {
				var attr = tree.itemFromPosition(pos, true);
				return attr && attr.name().toLowerCase() == 'style' 
					&& attr.valueRange(true).cmp(pos, 'lte', 'gte')
					&& attr.valueRange(true);
			}
		},

		CSSSection: CSSSection
	};
});
/**
 * Utility module that provides ordered storage of function handlers. 
 * Many Emmet modules' functionality can be extended/overridden by custom
 * function. This modules provides unified storage of handler functions, their 
 * management and execution
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/handlerList',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');
	
	/**
	 * @type HandlerList
	 * @constructor
	 */
	function HandlerList() {
		this._list = [];
	}
	
	HandlerList.prototype = {
		/**
		 * Adds function handler
		 * @param {Function} fn Handler
		 * @param {Object} options Handler options. Possible values are:<br><br>
		 * <b>order</b> : (<code>Number</code>) – order in handler list. Handlers
		 * with higher order value will be executed earlier.
		 */
		add: function(fn, options) {
			this._list.push(_.extend({order: 0}, options || {}, {fn: fn}));
		},
		
		/**
		 * Removes handler from list
		 * @param {Function} fn
		 */
		remove: function(fn) {
			this._list = _.without(this._list, _.find(this._list, function(item) {
				return item.fn === fn;
			}));
		},
		
		/**
		 * Returns ordered list of handlers. By default, handlers 
		 * with the same <code>order</code> option returned in reverse order, 
		 * i.e. the latter function was added into the handlers list, the higher 
		 * it will be in the returned array 
		 * @returns {Array}
		 */
		list: function() {
			return _.sortBy(this._list, 'order').reverse();
		},
		
		/**
		 * Returns ordered list of handler functions
		 * @returns {Array}
		 */
		listFn: function() {
			return _.pluck(this.list(), 'fn');
		},
		
		/**
		 * Executes handler functions in their designated order. If function
		 * returns <code>skipVal</code>, meaning that function was unable to 
		 * handle passed <code>args</code>, the next function will be executed
		 * and so on.
		 * @param {Object} skipValue If function returns this value, execute 
		 * next handler.
		 * @param {Array} args Arguments to pass to handler function
		 * @returns {Boolean} Whether any of registered handlers performed
		 * successfully  
		 */
		exec: function(skipValue, args) {
			args = args || [];
			var result = null;
			_.find(this.list(), function(h) {
				result = h.fn.apply(h, args);
				if (result !== skipValue)
					return true;
			});
			
			return result;
		}
	};
	
	return {
		/**
		 * Factory method that produces <code>HandlerList</code> instance
		 * @returns {HandlerList}
		 * @memberOf handlerList
		 */
		create: function() {
			return new HandlerList();
		}
	};
});
/**
 * Module that contains factories for element types used by Emmet
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/elements',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');
	var factories = {};
	var reAttrs = /([@\!]?)([\w\-:]+)\s*=\s*(['"])(.*?)\3/g;

	// register resource references
	function commonFactory(value) {
		return {data: value};
	}

	module = module || {};
	module.exports = {
		/**
		 * Create new element factory
		 * @param {String} name Element identifier
		 * @param {Function} factory Function that produces element of specified 
		 * type. The object generated by this factory is automatically 
		 * augmented with <code>type</code> property pointing to element
		 * <code>name</code>
		 * @memberOf elements
		 */
		add: function(name, factory) {
			var that = this;
			factories[name] = function() {
				var elem = factory.apply(that, arguments);
				if (elem)
					elem.type = name;
				
				return elem;
			};
		},
		
		/**
		 * Returns factory for specified name
		 * @param {String} name
		 * @returns {Function}
		 */
		get: function(name) {
			return factories[name];
		},
		
		/**
		 * Creates new element with specified type
		 * @param {String} name
		 * @returns {Object}
		 */
		create: function(name) {
			var args = [].slice.call(arguments, 1);
			var factory = this.get(name);
			return factory ? factory.apply(this, args) : null;
		},
		
		/**
		 * Check if passed element is of specified type
		 * @param {Object} elem
		 * @param {String} type
		 * @returns {Boolean}
		 */
		is: function(elem, type) {
			return this.type(elem) === type;
		},

		/**
		 * Returns type of element
		 * @param  {Object} elem
		 * @return {String}
		 */
		type: function(elem) {
			return elem && elem.type;
		}
	};
	
	/**
	 * Element factory
	 * @param {String} elementName Name of output element
	 * @param {String} attrs Attributes definition. You may also pass
	 * <code>Array</code> where each contains object with <code>name</code> 
	 * and <code>value</code> properties, or <code>Object</code>
	 * @param {Boolean} isEmpty Is expanded element should be empty
	 */
	module.exports.add('element', function(elementName, attrs, isEmpty) {
		var ret = {
			name: elementName,
			is_empty: !!isEmpty
		};

		if (attrs) {
			ret.attributes = [];
			if (_.isArray(attrs)) {
				ret.attributes = attrs;
			} else if (_.isString(attrs)) {
				var m;
				while ((m = reAttrs.exec(attrs))) {
					ret.attributes.push({
						name: m[2],
						value: m[4],
						isDefault: m[1] == '@',
						isImplied: m[1] == '!'
					});
				}
			} else {
				_.each(attrs, function(value, name) {
					ret.attributes.push({
						name: name, 
						value: value
					});
				});
			}
		}
		
		return ret;
	});
	
	module.exports.add('snippet', commonFactory);
	module.exports.add('reference', commonFactory);
	module.exports.add('empty', function() {
		return {};
	});
	
	return module.exports;
});
/**
 * Simple logger for Emmet
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/logger',['require','exports','module'],function(require, exports, module) {
	return {
		log: function() {
			if (typeof console != 'undefined' && console.log) {
				console.log.apply(console, arguments);
			}
		}
	}
});
/*!
 * string_score.js: String Scoring Algorithm 0.1.10 
 *
 * http://joshaven.com/string_score
 * https://github.com/joshaven/string_score
 *
 * Copyright (C) 2009-2011 Joshaven Potter <yourtech@gmail.com>
 * Special thanks to all of the contributors listed here https://github.com/joshaven/string_score
 * MIT license: http://www.opensource.org/licenses/mit-license.php
 *
 * Date: Tue Mar 1 2011
*/

/**
 * Scores a string against another string.
 *  'Hello World'.score('he');     //=> 0.5931818181818181
 *  'Hello World'.score('Hello');  //=> 0.7318181818181818
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('vendor/stringScore',['require','exports','module'],function(require, exports, module) {
	return {
		score: function(string, abbreviation, fuzziness) {
			// If the string is equal to the abbreviation, perfect match.
			  if (string == abbreviation) {return 1;}
			  //if it's not a perfect match and is empty return 0
			  if(abbreviation == "") {return 0;}

			  var total_character_score = 0,
			      abbreviation_length = abbreviation.length,
			      string_length = string.length,
			      start_of_string_bonus,
			      abbreviation_score,
			      fuzzies=1,
			      final_score;
			  
			  // Walk through abbreviation and add up scores.
			  for (var i = 0,
			         character_score/* = 0*/,
			         index_in_string/* = 0*/,
			         c/* = ''*/,
			         index_c_lowercase/* = 0*/,
			         index_c_uppercase/* = 0*/,
			         min_index/* = 0*/;
			     i < abbreviation_length;
			     ++i) {
			    
			    // Find the first case-insensitive match of a character.
			    c = abbreviation.charAt(i);
			    
			    index_c_lowercase = string.indexOf(c.toLowerCase());
			    index_c_uppercase = string.indexOf(c.toUpperCase());
			    min_index = Math.min(index_c_lowercase, index_c_uppercase);
			    index_in_string = (min_index > -1) ? min_index : Math.max(index_c_lowercase, index_c_uppercase);
			    
			    if (index_in_string === -1) { 
			      if (fuzziness) {
			        fuzzies += 1-fuzziness;
			        continue;
			      } else {
			        return 0;
			      }
			    } else {
			      character_score = 0.1;
			    }
			    
			    // Set base score for matching 'c'.
			    
			    // Same case bonus.
			    if (string[index_in_string] === c) { 
			      character_score += 0.1; 
			    }
			    
			    // Consecutive letter & start-of-string Bonus
			    if (index_in_string === 0) {
			      // Increase the score when matching first character of the remainder of the string
			      character_score += 0.6;
			      if (i === 0) {
			        // If match is the first character of the string
			        // & the first character of abbreviation, add a
			        // start-of-string match bonus.
			        start_of_string_bonus = 1; //true;
			      }
			    }
			    else {
			  // Acronym Bonus
			  // Weighing Logic: Typing the first character of an acronym is as if you
			  // preceded it with two perfect character matches.
			  if (string.charAt(index_in_string - 1) === ' ') {
			    character_score += 0.8; // * Math.min(index_in_string, 5); // Cap bonus at 0.4 * 5
			  }
			    }
			    
			    // Left trim the already matched part of the string
			    // (forces sequential matching).
			    string = string.substring(index_in_string + 1, string_length);
			    
			    total_character_score += character_score;
			  } // end of for loop
			  
			  // Uncomment to weigh smaller words higher.
			  // return total_character_score / string_length;
			  
			  abbreviation_score = total_character_score / abbreviation_length;
			  //percentage_of_matched_string = abbreviation_length / string_length;
			  //word_score = abbreviation_score * percentage_of_matched_string;
			  
			  // Reduce penalty for longer strings.
			  //final_score = (word_score + abbreviation_score) / 2;
			  final_score = ((abbreviation_score * (abbreviation_length / string_length)) + abbreviation_score) / 2;
			  
			  final_score = final_score / fuzzies;
			  
			  if (start_of_string_bonus && (final_score + 0.15 < 1)) {
			    final_score += 0.15;
			  }
			  
			  return final_score;
		}
	};
});
/**
 * Common module's preferences storage. This module 
 * provides general storage for all module preferences, their description and
 * default values.<br><br>
 * 
 * This module can also be used to list all available properties to create 
 * UI for updating properties
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/preferences',['require','exports','module','lodash','../utils/common'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');

	var preferences = {};
	var defaults = {};
	var _dbgDefaults = null;
	var _dbgPreferences = null;

	function toBoolean(val) {
		if (_.isString(val)) {
			val = val.toLowerCase();
			return val == 'yes' || val == 'true' || val == '1';
		}

		return !!val;
	}
	
	function isValueObj(obj) {
		return _.isObject(obj) 
			&& 'value' in obj 
			&& _.keys(obj).length < 3;
	}
	
	return {
		/**
		 * Creates new preference item with default value
		 * @param {String} name Preference name. You can also pass object
		 * with many options
		 * @param {Object} value Preference default value
		 * @param {String} description Item textual description
		 * @memberOf preferences
		 */
		define: function(name, value, description) {
			var prefs = name;
			if (_.isString(name)) {
				prefs = {};
				prefs[name] = {
					value: value,
					description: description
				};
			}
			
			_.each(prefs, function(v, k) {
				defaults[k] = isValueObj(v) ? v : {value: v};
			});
		},
		
		/**
		 * Updates preference item value. Preference value should be defined
		 * first with <code>define</code> method.
		 * @param {String} name Preference name. You can also pass object
		 * with many options
		 * @param {Object} value Preference default value
		 * @memberOf preferences
		 */
		set: function(name, value) {
			var prefs = name;
			if (_.isString(name)) {
				prefs = {};
				prefs[name] = value;
			}
			
			_.each(prefs, function(v, k) {
				if (!(k in defaults)) {
					throw 'Property "' + k + '" is not defined. You should define it first with `define` method of current module';
				}
				
				// do not set value if it equals to default value
				if (v !== defaults[k].value) {
					// make sure we have value of correct type
					switch (typeof defaults[k].value) {
						case 'boolean':
							v = toBoolean(v);
							break;
						case 'number':
							v = parseInt(v + '', 10) || 0;
							break;
						default: // convert to string
							if (v !== null) {
								v += '';
							}
					}

					preferences[k] = v;
				} else if  (k in preferences) {
					delete preferences[k];
				}
			});
		},
		
		/**
		 * Returns preference value
		 * @param {String} name
		 * @returns {String} Returns <code>undefined</code> if preference is 
		 * not defined
		 */
		get: function(name) {
			if (name in preferences)
				return preferences[name];
			
			if (name in defaults)
				return defaults[name].value;
			
			return void 0;
		},
		
		/**
		 * Returns comma-separated preference value as array of values
		 * @param {String} name
		 * @returns {Array} Returns <code>undefined</code> if preference is 
		 * not defined, <code>null</code> if string cannot be converted to array
		 */
		getArray: function(name) {
			var val = this.get(name);
			if (_.isUndefined(val) || val === null || val === '')  {
				return null;
			}

			val = _.map(val.split(','), utils.trim);
			if (!val.length) {
				return null;
			}
			
			return val;
		},
		
		/**
		 * Returns comma and colon-separated preference value as dictionary
		 * @param {String} name
		 * @returns {Object}
		 */
		getDict: function(name) {
			var result = {};
			_.each(this.getArray(name), function(val) {
				var parts = val.split(':');
				result[parts[0]] = parts[1];
			});
			
			return result;
		},
		
		/**
		 * Returns description of preference item
		 * @param {String} name Preference name
		 * @returns {Object}
		 */
		description: function(name) {
			return name in defaults ? defaults[name].description : void 0;
		},
		
		/**
		 * Completely removes specified preference(s)
		 * @param {String} name Preference name (or array of names)
		 */
		remove: function(name) {
			if (!_.isArray(name))
				name = [name];
			
			_.each(name, function(key) {
				if (key in preferences)
					delete preferences[key];
				
				if (key in defaults)
					delete defaults[key];
			});
		},
		
		/**
		 * Returns sorted list of all available properties
		 * @returns {Array}
		 */
		list: function() {
			return _.map(_.keys(defaults).sort(), function(key) {
				return {
					name: key,
					value: this.get(key),
					type: typeof defaults[key].value,
					description: defaults[key].description
				};
			}, this);
		},
		
		/**
		 * Loads user-defined preferences from JSON
		 * @param {Object} json
		 * @returns
		 */
		load: function(json) {
			_.each(json, function(value, key) {
				this.set(key, value);
			}, this);
		},

		/**
		 * Returns hash of user-modified preferences
		 * @returns {Object}
		 */
		exportModified: function() {
			return _.clone(preferences);
		},
		
		/**
		 * Reset to defaults
		 * @returns
		 */
		reset: function() {
			preferences = {};
		},
		
		/**
		 * For unit testing: use empty storage
		 */
		_startTest: function() {
			_dbgDefaults = defaults;
			_dbgPreferences = preferences;
			defaults = {};
			preferences = {};
		},
		
		/**
		 * For unit testing: restore original storage
		 */
		_stopTest: function() {
			defaults = _dbgDefaults;
			preferences = _dbgPreferences;
		}
	};
});
/**
 * Parsed resources (snippets, abbreviations, variables, etc.) for Emmet.
 * Contains convenient method to get access for snippets with respect of 
 * inheritance. Also provides ability to store data in different vocabularies
 * ('system' and 'user') for fast and safe resource update
 * @author Sergey Chikuyonok (serge.che@gmail.com)
 * @link http://chikuyonok.ru
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/caniuse',['require','exports','module','lodash','./preferences'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('./preferences');

	prefs.define('caniuse.enabled', true, 'Enable support of Can I Use database. When enabled,\
		CSS abbreviation resolver will look at Can I Use database first before detecting\
		CSS properties that should be resolved');
	
	prefs.define('caniuse.vendors', 'all', 'A comma-separated list vendor identifiers\
		(as described in Can I Use database) that should be supported\
		when resolving vendor-prefixed properties. Set value to <code>all</code>\
		to support all available properties');
	
	prefs.define('caniuse.era', 'e-2', 'Browser era, as defined in Can I Use database.\
		Examples: <code>e0</code> (current version), <code>e1</code> (near future)\
		<code>e-2</code> (2 versions back) and so on.');
	
	var cssSections = {
		'border-image': ['border-image'],
		'css-boxshadow': ['box-shadow'],
		'css3-boxsizing': ['box-sizing'],
		'multicolumn': ['column-width', 'column-count', 'columns', 'column-gap', 'column-rule-color', 'column-rule-style', 'column-rule-width', 'column-rule', 'column-span', 'column-fill'],
		'border-radius': ['border-radius', 'border-top-left-radius', 'border-top-right-radius', 'border-bottom-right-radius', 'border-bottom-left-radius'],
		'transforms2d': ['transform'],
		'css-hyphens': ['hyphens'],
		'css-transitions': ['transition', 'transition-property', 'transition-duration', 'transition-timing-function', 'transition-delay'],
		'font-feature': ['font-feature-settings'],
		'css-animation': ['animation', 'animation-name', 'animation-duration', 'animation-timing-function', 'animation-iteration-count', 'animation-direction', 'animation-play-state', 'animation-delay', 'animation-fill-mode', '@keyframes'],
		'css-gradients': ['linear-gradient'],
		'css-masks': ['mask-image', 'mask-source-type', 'mask-repeat', 'mask-position', 'mask-clip', 'mask-origin', 'mask-size', 'mask', 'mask-type', 'mask-box-image-source', 'mask-box-image-slice', 'mask-box-image-width', 'mask-box-image-outset', 'mask-box-image-repeat', 'mask-box-image', 'clip-path', 'clip-rule'],
		'css-featurequeries': ['@supports'],
		'flexbox': ['flex', 'inline-flex', 'flex-direction', 'flex-wrap', 'flex-flow', 'order', 'flex'],
		'calc': ['calc'],
		'object-fit': ['object-fit', 'object-position'],
		'css-grid': ['grid', 'inline-grid', 'grid-template-rows', 'grid-template-columns', 'grid-template-areas', 'grid-template', 'grid-auto-rows', 'grid-auto-columns', ' grid-auto-flow', 'grid-auto-position', 'grid', ' grid-row-start', 'grid-column-start', 'grid-row-end', 'grid-column-end', 'grid-column', 'grid-row', 'grid-area', 'justify-self', 'justify-items', 'align-self', 'align-items'],
		'css-repeating-gradients': ['repeating-linear-gradient'],
		'css-filters': ['filter'],
		'user-select-none': ['user-select'],
		'intrinsic-width': ['min-content', 'max-content', 'fit-content', 'fill-available'],
		'css3-tabsize': ['tab-size']
	};

	/** @type {Object} The Can I Use database for CSS */
	var cssDB = null;
	/** @type {Object} A list of available vendors (browsers) and their prefixes */
	var vendorsDB = null;
	var erasDB = null;

	/**
	 * Parses raw Can I Use database for better lookups
	 * @param  {String} data Raw database
	 * @param  {Boolean} optimized Pass `true` if given `data` is already optimized
	 * @return {Object}
	 */
	function parseDB(data, optimized) {
		if (typeof data == 'string') {
			data = JSON.parse(data);
		}

		if (!optimized) {
			data = optimize(data);
		}

		vendorsDB = data.vendors;
		cssDB = data.css;
		erasDB = data.era;
	}

	/**
	 * Extract required data only from CIU database 
	 * @param  {Object} data Raw Can I Use database
	 * @return {Object}      Optimized database
	 */
	function optimize(data) {
		if (typeof data == 'string') {
			data = JSON.parse(data);
		}

		return {
			vendors: parseVendors(data),
			css: parseCSS(data),
			era: parseEra(data)
		};
	}

	/**
	 * Parses vendor data
	 * @param  {Object} data
	 * @return {Object}
	 */
	function parseVendors(data) {
		var out = {};
		_.each(data.agents, function(agent, name) {
			out[name] = {
				prefix: agent.prefix,
				versions: agent.versions
			};
		});
		return out;
	}

	/**
	 * Parses CSS data from Can I Use raw database
	 * @param  {Object} data
	 * @return {Object}
	 */
	function parseCSS(data) {
		var out = {};
		var cssCategories = data.cats.CSS;
		
		_.each(data.data, function(section, name) {
			if (name in cssSections) {
				_.each(cssSections[name], function(kw) {
					out[kw] = section.stats;
				});
			}
		});

		return out;
	}

	/**
	 * Parses era data from Can I Use raw database
	 * @param  {Object} data
	 * @return {Array}
	 */
	function parseEra(data) {
		// some runtimes (like Mozilla Rhino) does not preserves
		// key order so we have to sort values manually
		return _.keys(data.eras).sort(function(a, b) {
			return parseInt(a.substr(1)) - parseInt(b.substr(1));
		});
	}
	
	/**
	 * Returs list of supported vendors, depending on user preferences
	 * @return {Array}
	 */
	function getVendorsList() {
		var allVendors = _.keys(vendorsDB);
		var vendors = prefs.getArray('caniuse.vendors');
		if (!vendors || vendors[0] == 'all') {
			return allVendors;
		}

		return _.intersection(allVendors, vendors);
	}

	/**
	 * Returns size of version slice as defined by era identifier
	 * @return {Number}
	 */
	function getVersionSlice() {
		var era = prefs.get('caniuse.era');
		var ix = _.indexOf(erasDB, era);
		if (!~ix) {
			ix = _.indexOf(erasDB, 'e-2');
		}

		return ix;
	}

	// try to load caniuse database
	// hide it from Require.JS parser
	var db = null;
	(function(r) {
		if (typeof define === 'undefined' || !define.amd) {
			var fs = r('fs');
			var path = r('path');

			db = fs.readFileSync(path.join(__dirname, '../caniuse.json'), {encoding: 'utf8'});
		}
	})(require);
	
	if (db) {
		parseDB(db);
	}

	return {
		load: parseDB,
		optimize: optimize,
		
		/**
		 * Resolves prefixes for given property
		 * @param {String} property A property to resolve. It can start with `@` symbol
		 * (CSS section, like `@keyframes`) or `:` (CSS value, like `flex`)
		 * @return {Array} Array of resolved prefixes or <code>null</code>
		 * if prefixes can't be resolved. Empty array means property has no vendor
		 * prefixes
		 */
		resolvePrefixes: function(property) {
			if (!prefs.get('caniuse.enabled') || !cssDB || !(property in cssDB)) {
				return null;
			}

			var prefixes = [];
			var propStats = cssDB[property];
			var versions = getVersionSlice();

			_.each(getVendorsList(), function(vendor) {
				var vendorVesions = vendorsDB[vendor].versions.slice(versions);
				for (var i = 0, v; i < vendorVesions.length; i++) {
					v = vendorVesions[i];
					if (!v) {
						continue;
					}

					if (~propStats[vendor][v].indexOf('x')) {
						prefixes.push(vendorsDB[vendor].prefix);
						break;
					}
				}
			});

			return _.unique(prefixes).sort(function(a, b) {
				return b.length - a.length;
			});
		}
	};
});
/**
 * A very simple, ERB-style templating. Basically, just as string substitution.
 * The reason to not use default Lo-dash’es `_.template()` implementation
 * is because it fails to run in CSP-enabled environments (Chrome extension, Atom)
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/template',['require','exports','module','lodash','../assets/stringStream','./common'],function(require, exports, module) {
	var _ = require('lodash');
	var stringStream = require('../assets/stringStream');
	var utils = require('./common');

	function parseArgs(str) {
		var args = [];
		var stream = stringStream(str);

		while (!stream.eol()) {
			if (stream.peek() == ',') {
				args.push(utils.trim(stream.current()));
				stream.next();
				stream.start = stream.pos;
			}
			stream.next();
		}

		args.push(utils.trim(stream.current()));
		return _.compact(args);
	}

	function parseFunctionCall(str) {
		var fnName = null, args;
		var stream = stringStream(str);
		while (!stream.eol()) {
			if (stream.peek() == '(') {
				fnName = stream.current();
				stream.start = stream.pos;
				stream.skipToPair('(', ')', true);
				args = stream.current();
				args = parseArgs(args.substring(1, args.length - 1));
				break;
			}

			stream.next();
		}

		return fnName && {
			name: fnName,
			args: args
		};
	}

	function evalArg(arg, context) {
		if (/^['"]/.test(arg)) {
			// plain string
			return arg.replace(/^(['"])(.+?)\1$/, '$2');
		}

		if (!_.isNaN(+arg)) {
			// a number
			return +arg;
		}

		// otherwise, treat argument as a property name
		if (arg) {
			var parts = arg.split('.');
			var prop = context;
			while (parts.length) {
				prop = prop[parts.shift()];
			}

			return prop;
		}
	}

	function process(template, context) {
		return template.replace(/<%[=\-](.+?)%>/g, function(str, match) {
			match = utils.trim(match);
			var fn = parseFunctionCall(match);
			if (fn) {
				var fnArgs = _.map(fn.args, function(arg) {
					return evalArg(arg, context);
				});
				return context[fn.name].apply(context, fnArgs);
			}

			return evalArg(match, context);
		});
	}

	return function(template, context) {
		return context ? process(template, context) : function(context) {
			return process(template, context);
		};
	};
});
/**
 * Helper class for convenient token iteration
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/tokenIterator',['require','exports','module'],function(require, exports, module) {
	/**
	 * @type TokenIterator
	 * @param {Array} tokens
	 * @type TokenIterator
	 * @constructor
	 */
	function TokenIterator(tokens) {
		/** @type Array */
		this.tokens = tokens;
		this._position = 0;
		this.reset();
	}
	
	TokenIterator.prototype = {
		next: function() {
			if (this.hasNext()) {
				var token = this.tokens[++this._i];
				this._position = token.start;
				return token;
			} else {
				this._i = this._il;
			}
			
			return null;
		},
		
		current: function() {
			return this.tokens[this._i];
		},

		peek: function() {
			return this.tokens[this._i + i];
		},
		
		position: function() {
			return this._position;
		},
		
		hasNext: function() {
			return this._i < this._il - 1;
		},
		
		reset: function() {
			this._i = 0;
			this._il = this.tokens.length;
		},
		
		item: function() {
			return this.tokens[this._i];
		},
		
		itemNext: function() {
			return this.tokens[this._i + 1];
		},
		
		itemPrev: function() {
			return this.tokens[this._i - 1];
		},
		
		nextUntil: function(type, callback) {
			var token;
			var test = typeof type == 'string' 
				? function(t){return t.type == type;} 
				: type;
			
			while ((token = this.next())) {
				if (callback)
					callback.call(this, token);
				if (test.call(this, token))
					break;
			}
		}
	};
	
	return {
		create: function(tokens) {
			return new TokenIterator(tokens);
		}
	};
});
/**
 * CSS EditTree is a module that can parse a CSS rule into a tree with 
 * convenient methods for adding, modifying and removing CSS properties. These 
 * changes can be written back to string with respect of code formatting.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('editTree/css',['require','exports','module','lodash','../utils/common','./base','../parser/css','../utils/cssSections','../assets/range','../assets/stringStream','../assets/tokenIterator'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var editTree = require('./base');
	var cssParser = require('../parser/css');
	var cssSections = require('../utils/cssSections');
	var range = require('../assets/range');
	var stringStream = require('../assets/stringStream');
	var tokenIterator = require('../assets/tokenIterator');

	var defaultOptions = {
		styleBefore: '\n\t',
		styleSeparator: ': ',
		offset: 0
	};
	
	var reSpaceStart = /^\s+/;
	var reSpaceEnd = /\s+$/;
	var WHITESPACE_REMOVE_FROM_START = 1;
	var WHITESPACE_REMOVE_FROM_END   = 2;
	
	/**
	 * Modifies given range to remove whitespace from beginning
	 * and/or from the end
	 * @param  {Range} rng Range to modify
	 * @param  {String} text  Text that range belongs to
	 * @param  {Number} mask  Mask indicating from which end 
	 * whitespace should be removed
	 * @return {Range}
	 */
	function trimWhitespaceInRange(rng, text, mask) {
		mask = mask || (WHITESPACE_REMOVE_FROM_START | WHITESPACE_REMOVE_FROM_END);
		text = rng.substring(text);
		var m;
		if ((mask & WHITESPACE_REMOVE_FROM_START) && (m = text.match(reSpaceStart))) {
			rng.start += m[0].length;
		}

		if ((mask & WHITESPACE_REMOVE_FROM_END) && (m = text.match(reSpaceEnd))) {
			rng.end -= m[0].length;
		}

		// in case given range is just a whatespace
		if (rng.end < rng.start) {
			rng.end = rng.start;
		}

		return rng;
	}

	/**
	 * Consumes CSS property and value from current token
	 * iterator state. Offsets iterator pointer into token
	 * that can be used for next value consmption
	 * @param  {TokenIterator} it
	 * @param  {String} text
	 * @return {Object}    Object with `name` and `value` properties 
	 * ar ranges. Value range can be zero-length.
	 */
	function consumeSingleProperty(it, text) {
		var name, value, end;
		var token = it.current();

		if (!token) {
			return null;
		}

		// skip whitespace
		var ws = {'white': 1, 'line': 1, 'comment': 1};
		while ((token = it.current())) {
			if (!(token.type in ws)) {
				break;
			}
			it.next();
		}

		if (!it.hasNext()) {
			return null;
		}

		// consume property name
		token = it.current();
		name = range(token.start, token.value);
		while (token = it.next()) {
			name.end = token.end;
			if (token.type == ':' || token.type == 'white') {
				name.end = token.start;
				it.next();
				break;
			} else if (token.type == ';' || token.type == 'line') {
				// there’s no value, looks like a mixin
				// or a special use case:
				// user is writing a new property or abbreviation
				name.end = token.start;
				value = range(token.start, 0);
				it.next();
				break;
			}
		}

		token = it.current();
		if (!value && token) {
			if (token.type == 'line') {
				lastNewline = token;
			}
			// consume value
			value = range(token.start, token.value);
			var lastNewline;
			while ((token = it.next())) {
				value.end = token.end;
				if (token.type == 'line') {
					lastNewline = token;
				} else if (token.type == '}' || token.type == ';') {
					value.end = token.start;
					if (token.type == ';') {
						end = range(token.start, token.value);
					}
					it.next();
					break;
				} else if (token.type == ':' && lastNewline) {
					// A special case: 
					// user is writing a value before existing
					// property, but didn’t inserted closing semi-colon.
					// In this case, limit value range to previous
					// newline
					value.end = lastNewline.start;
					it._i = _.indexOf(it.tokens, lastNewline);
					break;
				}
			}
		}

		if (!value) {
			value = range(name.end, 0);
		}

		return {
			name: trimWhitespaceInRange(name, text),
			value: trimWhitespaceInRange(value, text, WHITESPACE_REMOVE_FROM_START | (end ? WHITESPACE_REMOVE_FROM_END : 0)),
			end: end || range(value.end, 0)
		};
	}

	/**
	 * Finds parts of complex CSS value
	 * @param {String} str
	 * @returns {Array} Returns list of <code>Range</code>'s
	 */
	function findParts(str) {
		/** @type StringStream */
		var stream = stringStream.create(str);
		var ch;
		var result = [];
		var sep = /[\s\u00a0,;]/;
		
		var add = function() {
			stream.next();
			result.push(range(stream.start, stream.current()));
			stream.start = stream.pos;
		};
		
		// skip whitespace
		stream.eatSpace();
		stream.start = stream.pos;
		
		while ((ch = stream.next())) {
			if (ch == '"' || ch == "'") {
				stream.next();
				if (!stream.skipTo(ch)) break;
				add();
			} else if (ch == '(') {
				// function found, may have nested function
				stream.backUp(1);
				if (!stream.skipToPair('(', ')')) break;
				stream.backUp(1);
				add();
			} else {
				if (sep.test(ch)) {
					result.push(range(stream.start, stream.current().length - 1));
					stream.eatWhile(sep);
					stream.start = stream.pos;
				}
			}
		}
		
		add();
		
		return _.chain(result)
			.filter(function(item) {
				return !!item.length();
			})
			.uniq(false, function(item) {
				return item.toString();
			})
			.value();
	}
	
	/**
	 * Parses CSS properties from given CSS source
	 * and adds them to CSSEditContainsd node
	 * @param  {CSSEditContainer} node
	 * @param  {String} source CSS source
	 * @param {Number} offset Offset of properties subset from original source
	 */
	function consumeProperties(node, source, offset) {
		var list = extractPropertiesFromSource(source, offset);

		_.each(list, function(property) {
			node._children.push(new CSSEditElement(node,
				editTree.createToken(property.name.start, property.nameText),
				editTree.createToken(property.value.start, property.valueText),
				editTree.createToken(property.end.start, property.endText)
				));
		});
	}

	/**
	 * Parses given CSS source and returns list of ranges of located CSS properties.
	 * Normally, CSS source must contain properties only, it must be,
	 * for example, a content of CSS selector or text between nested
	 * CSS sections
	 * @param  {String} source CSS source
	 * @param {Number} offset Offset of properties subset from original source.
	 * Used to provide proper ranges of locates items
	 */
	function extractPropertiesFromSource(source, offset) {
		offset = offset || 0;
		source = source.replace(reSpaceEnd, '');
		var out = [];

		if (!source) {
			return out;
		}

		var tokens = cssParser.parse(source);
		var it = tokenIterator.create(tokens);
		var property;

		while ((property = consumeSingleProperty(it, source))) {
			out.push({
				nameText: property.name.substring(source),
				name: property.name.shift(offset),

				valueText: property.value.substring(source),
				value: property.value.shift(offset),

				endText: property.end.substring(source),
				end: property.end.shift(offset)
			});
		}

		return out;
	}
	
	/**
	 * @class
	 * @extends EditContainer
	 */
	var CSSEditContainer = editTree.EditContainer.extend({
		initialize: function(source, options) {
			_.extend(this.options, defaultOptions, options);
			
			if (_.isArray(source)) {
				source = cssParser.toSource(source);
			}

			var allRules = cssSections.findAllRules(source);
			var currentRule = allRules.shift();

			// keep top-level rules only since they will
			// be parsed by nested CSSEditContainer call
			var topLevelRules = [];
			_.each(allRules, function(r) {
				var isTopLevel = !_.find(topLevelRules, function(tr) {
					return tr.contains(r);
				});

				if (isTopLevel) {
					topLevelRules.push(r);
				}
			});


			var selectorRange = range.create2(currentRule.start, currentRule._selectorEnd);
			this._name = selectorRange.substring(source);
			this._positions.name = selectorRange.start;
			this._positions.contentStart = currentRule._contentStart + 1;

			var sectionOffset = currentRule._contentStart + 1;
			var sectionEnd = currentRule.end - 1;

			// parse properties between nested rules
			// and add nested rules as children
			var that = this;
			_.each(topLevelRules, function(r) {
				consumeProperties(that, source.substring(sectionOffset, r.start), sectionOffset);
				var opt = _.extend({}, that.options, {offset: r.start + that.options.offset});
				// XXX I think I don’t need nested containers here
				// They should be handled separately
				// that._children.push(new CSSEditContainer(r.substring(source), opt));
				sectionOffset = r.end;
			});

			// consume the rest of data
			consumeProperties(this, source.substring(sectionOffset, currentRule.end - 1), sectionOffset);
			this._saveStyle();
		},
		
		/**
		 * Remembers all styles of properties
		 * @private
		 */
		_saveStyle: function() {
			var start = this._positions.contentStart;
			var source = this.source;
			
			_.each(this.list(), /** @param {CSSEditProperty} p */ function(p) {
				if (p.type == 'container') {
					return;
				}

				p.styleBefore = source.substring(start, p.namePosition());
				// a small hack here:
				// Sometimes users add empty lines before properties to logically
				// separate groups of properties. In this case, a blind copy of
				// characters between rules may lead to undesired behavior,
				// especially when current rule is duplicated or used as a donor
				// to create new rule.
				// To solve this issue, we‘ll take only last newline indentation
				var lines = utils.splitByLines(p.styleBefore);
				if (lines.length > 1) {
					p.styleBefore = '\n' + _.last(lines);
				}
				
				p.styleSeparator = source.substring(p.nameRange().end, p.valuePosition());
				
				// graceful and naive comments removal 
				p.styleBefore = _.last(p.styleBefore.split('*/'));
				p.styleSeparator = p.styleSeparator.replace(/\/\*.*?\*\//g, '');
				
				start = p.range().end;
			});
		},

		/**
		 * Returns position of element name token
		 * @param {Boolean} isAbsolute Return absolute position
		 * @returns {Number}
		 */
		namePosition: function(isAbsolute) {
			return this._pos(this._positions.name, isAbsolute);
		},
		
		/**
		 * Returns position of element value token
		 * @param {Boolean} isAbsolute Return absolute position
		 * @returns {Number}
		 */
		valuePosition: function(isAbsolute) {
			return this._pos(this._positions.contentStart, isAbsolute);
		},

		/**
		 * Returns element value range
		 * @param {Boolean} isAbsolute Return absolute range
		 * @returns {Range}
		 */
		valueRange: function(isAbsolute) {
			return range.create2(this.valuePosition(isAbsolute), this._pos(this.valueOf().length, isAbsolute) - 1);
		},
		
		/**
		 * Adds new CSS property 
		 * @param {String} name Property name
		 * @param {String} value Property value
		 * @param {Number} pos Position at which to insert new property. By 
		 * default the property is inserted at the end of rule 
		 * @returns {CSSEditProperty}
		 */
		add: function(name, value, pos) {
			var list = this.list();
			var start = this._positions.contentStart;
			var styles = _.pick(this.options, 'styleBefore', 'styleSeparator');
			
			if (_.isUndefined(pos))
				pos = list.length;
			
			/** @type CSSEditProperty */
			var donor = list[pos];
			if (donor) {
				start = donor.fullRange().start;
			} else if ((donor = list[pos - 1])) {
				// make sure that donor has terminating semicolon
				donor.end(';');
				start = donor.range().end;
			}
			
			if (donor) {
				styles = _.pick(donor, 'styleBefore', 'styleSeparator');
			}
			
			var nameToken = editTree.createToken(start + styles.styleBefore.length, name);
			var valueToken = editTree.createToken(nameToken.end + styles.styleSeparator.length, value);
			
			var property = new CSSEditElement(this, nameToken, valueToken,
					editTree.createToken(valueToken.end, ';'));
			
			_.extend(property, styles);
			
			// write new property into the source
			this._updateSource(property.styleBefore + property.toString(), start);
			
			// insert new property
			this._children.splice(pos, 0, property);
			return property;
		}
	});
	
	/**
	 * @class
	 * @type CSSEditElement
	 * @constructor
	 */
	var CSSEditElement = editTree.EditElement.extend({
		initialize: function(rule, name, value, end) {
			this.styleBefore = rule.options.styleBefore;
			this.styleSeparator = rule.options.styleSeparator;
			
			this._end = end.value;
			this._positions.end = end.start;
		},
		
		/**
		 * Returns ranges of complex value parts
		 * @returns {Array} Returns <code>null</code> if value is not complex
		 */
		valueParts: function(isAbsolute) {
			var parts = findParts(this.value());
			if (isAbsolute) {
				var offset = this.valuePosition(true);
				_.each(parts, function(p) {
					p.shift(offset);
				});
			}
			
			return parts;
		},

		/**
		 * Sets of gets element value. 
		 * When setting value, this implementation will ensure that your have 
		 * proper name-value separator
		 * @param {String} val New element value. If not passed, current 
		 * value is returned
		 * @returns {String}
		 */
		value: function(val) {
			var isUpdating = !_.isUndefined(val);
			var allItems = this.parent.list();
			if (isUpdating && this.isIncomplete()) {
				var self = this;
				var donor = _.find(allItems, function(item) {
					return item !== self && !item.isIncomplete();
				});

				this.styleSeparator = donor 
					? donor.styleSeparator 
					: this.parent.options.styleSeparator;
				this.parent._updateSource(this.styleSeparator, range(this.valueRange().start, 0));
			}

			var value = this.constructor.__super__.value.apply(this, arguments);
			if (isUpdating) {
				// make sure current property has terminating semi-colon
				// if it’s not the last one
				var ix = _.indexOf(allItems, this);
				if (ix !== allItems.length - 1 && !this.end()) {
					this.end(';');
				}
			}
			return value;
		},

		/**
		 * Test if current element is incomplete, e.g. has no explicit
		 * name-value separator
		 * @return {Boolean} [description]
		 */
		isIncomplete: function() {
			return this.nameRange().end === this.valueRange().start;
		},
		
		/**
		 * Sets of gets property end value (basically, it's a semicolon)
		 * @param {String} val New end value. If not passed, current 
		 * value is returned
		 */
		end: function(val) {
			if (!_.isUndefined(val) && this._end !== val) {
				this.parent._updateSource(val, this._positions.end, this._positions.end + this._end.length);
				this._end = val;
			}
			
			return this._end;
		},
		
		/**
		 * Returns full rule range, with indentation
		 * @param {Boolean} isAbsolute Return absolute range (with respect of
		 * rule offset)
		 * @returns {Range}
		 */
		fullRange: function(isAbsolute) {
			var r = this.range(isAbsolute);
			r.start -= this.styleBefore.length;
			return r;
		},
		
		/**
		 * Returns item string representation
		 * @returns {String}
		 */
		valueOf: function() {
			return this.name() + this.styleSeparator + this.value() + this.end();
		}
	});
	
	return {
		/**
		 * Parses CSS rule into editable tree
		 * @param {String} source
		 * @param {Object} options
		 * @memberOf emmet.cssEditTree
		 * @returns {EditContainer}
		 */
		parse: function(source, options) {
			return new CSSEditContainer(source, options);
		},
		
		/**
		 * Extract and parse CSS rule from specified position in <code>content</code> 
		 * @param {String} content CSS source code
		 * @param {Number} pos Character position where to start source code extraction
		 * @returns {EditContainer}
		 */
		parseFromPosition: function(content, pos, isBackward) {
			var bounds = cssSections.locateRule(content, pos, isBackward);
			if (!bounds || !bounds.inside(pos)) {
				// no matching CSS rule or caret outside rule bounds
				return null;
			}
			
			return this.parse(bounds.substring(content), {
				offset: bounds.start
			});
		},

		/**
		 * Locates CSS property in given CSS code fragment under specified character position
		 * @param  {String} css CSS code or parsed CSSEditContainer
		 * @param  {Number} pos Character position where to search CSS property
		 * @return {CSSEditElement}
		 */
		propertyFromPosition: function(css, pos) {
			var cssProp = null;
			/** @type EditContainer */
			var cssRule = _.isString(css) ? this.parseFromPosition(css, pos, true) : css;
			if (cssRule) {
				cssProp = cssRule.itemFromPosition(pos, true);
				if (!cssProp) {
					// in case user just started writing CSS property
					// and didn't include semicolon–try another approach
					cssProp = _.find(cssRule.list(), function(elem) {
						return elem.range(true).end == pos;
					});
				}
			}

			return cssProp;
		},
		
		/**
		 * Removes vendor prefix from CSS property
		 * @param {String} name CSS property
		 * @return {String}
		 */
		baseName: function(name) {
			return name.replace(/^\s*\-\w+\-/, '');
		},
		
		/**
		 * Finds parts of complex CSS value
		 * @param {String} str
		 * @returns {Array}
		 */
		findParts: findParts,

		extractPropertiesFromSource: extractPropertiesFromSource
	};
});
/**
 * Resolver for fast CSS typing. Handles abbreviations with the following 
 * notation:<br>
 * 
 * <code>(-vendor prefix)?property(value)*(!)?</code>
 * 
 * <br><br>
 * <b>Abbreviation handling</b><br>
 * 
 * By default, Emmet searches for matching snippet definition for provided abbreviation.
 * If snippet wasn't found, Emmet automatically generates element with 
 * abbreviation's name. For example, <code>foo</code> abbreviation will generate
 * <code>&lt;foo&gt;&lt;/foo&gt;</code> output.
 * <br><br>
 * This module will capture all expanded properties and upgrade them with values, 
 * vendor prefixes and !important declarations. All unmatched abbreviations will 
 * be automatically transformed into <code>property-name: ${1}</code> snippets. 
 * 
 * <b>Vendor prefixes<b><br>
 * 
 * If CSS-property is preceded with dash, resolver should output property with
 * all <i>known</i> vendor prefixes. For example, if <code>brad</code> 
 * abbreviation generates <code>border-radius: ${value};</code> snippet,
 * the <code>-brad</code> abbreviation should generate:
 * <pre><code>
 * -webkit-border-radius: ${value};
 * -moz-border-radius: ${value};
 * border-radius: ${value};
 * </code></pre>
 * Note that <i>o</i> and <i>ms</i> prefixes are omitted since Opera and IE 
 * supports unprefixed property.<br><br>
 * 
 * Users can also provide an explicit list of one-character prefixes for any
 * CSS property. For example, <code>-wm-float</code> will produce
 * 
 * <pre><code>
 * -webkit-float: ${1};
 * -moz-float: ${1};
 * float: ${1};
 * </code></pre>
 * 
 * Although this example looks pointless, users can use this feature to write
 * cutting-edge properties implemented by browser vendors recently.  
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('resolver/css',['require','exports','module','lodash','../assets/preferences','../assets/resources','../assets/stringStream','../assets/caniuse','../utils/common','../utils/template','../editTree/css'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('../assets/preferences');
	var resources = require('../assets/resources');
	var stringStream = require('../assets/stringStream');
	var ciu = require('../assets/caniuse');
	var utils = require('../utils/common');
	var template = require('../utils/template');
	var cssEditTree = require('../editTree/css');

	var prefixObj = {
		/** Real vendor prefix name */
		prefix: 'emmet',
		
		/** 
		 * Indicates this prefix is obsolete and should't be used when user 
		 * wants to generate all-prefixed properties
		 */
		obsolete: false,
		
		/**
		 * Returns prefixed CSS property name
		 * @param {String} name Unprefixed CSS property
		 */
		transformName: function(name) {
			return '-' + this.prefix + '-' + name;
		},
		
		/**
		 * List of unprefixed CSS properties that supported by 
		 * current prefix. This list is used to generate all-prefixed property
		 * @returns {Array} 
		 */
		properties: function() {
			return getProperties('css.' + this.prefix + 'Properties') || [];
		},
		
		/**
		 * Check if given property is supported by current prefix
		 * @param name
		 */
		supports: function(name) {
			return _.include(this.properties(), name);
		}
	};
	
	
	/** 
	 * List of registered one-character prefixes. Key is a one-character prefix, 
	 * value is an <code>prefixObj</code> object
	 */
	var vendorPrefixes = {};
	
	var defaultValue = '${1};';
	
	// XXX module preferences
	prefs.define('css.valueSeparator', ': ',
			'Defines a symbol that should be placed between CSS property and ' 
			+ 'value when expanding CSS abbreviations.');
	prefs.define('css.propertyEnd', ';',
			'Defines a symbol that should be placed at the end of CSS property  ' 
			+ 'when expanding CSS abbreviations.');
	
	prefs.define('stylus.valueSeparator', ' ',
			'Defines a symbol that should be placed between CSS property and ' 
			+ 'value when expanding CSS abbreviations in Stylus dialect.');
	prefs.define('stylus.propertyEnd', '',
			'Defines a symbol that should be placed at the end of CSS property  ' 
			+ 'when expanding CSS abbreviations in Stylus dialect.');
	
	prefs.define('sass.propertyEnd', '',
			'Defines a symbol that should be placed at the end of CSS property  ' 
			+ 'when expanding CSS abbreviations in SASS dialect.');

	prefs.define('css.syntaxes', 'css, less, sass, scss, stylus, styl',
			'List of syntaxes that should be treated as CSS dialects.');
	
	prefs.define('css.autoInsertVendorPrefixes', true,
			'Automatically generate vendor-prefixed copies of expanded CSS ' 
			+ 'property. By default, Emmet will generate vendor-prefixed '
			+ 'properties only when you put dash before abbreviation ' 
			+ '(e.g. <code>-bxsh</code>). With this option enabled, you don’t ' 
			+ 'need dashes before abbreviations: Emmet will produce ' 
			+ 'vendor-prefixed properties for you.');

	prefs.define('less.autoInsertVendorPrefixes', false, 'Same as <code>css.autoInsertVendorPrefixes</code> but for LESS syntax');
	prefs.define('scss.autoInsertVendorPrefixes', false, 'Same as <code>css.autoInsertVendorPrefixes</code> but for SCSS syntax');
	prefs.define('sass.autoInsertVendorPrefixes', false, 'Same as <code>css.autoInsertVendorPrefixes</code> but for SASS syntax');
	prefs.define('stylus.autoInsertVendorPrefixes', false, 'Same as <code>css.autoInsertVendorPrefixes</code> but for Stylus syntax');
	
	var descTemplate = template('A comma-separated list of CSS properties that may have ' 
		+ '<code><%= vendor %></code> vendor prefix. This list is used to generate '
		+ 'a list of prefixed properties when expanding <code>-property</code> '
		+ 'abbreviations. Empty list means that all possible CSS values may ' 
		+ 'have <code><%= vendor %></code> prefix.');
	
	var descAddonTemplate = template('A comma-separated list of <em>additional</em> CSS properties ' 
			+ 'for <code>css.<%= vendor %>Preperties</code> preference. ' 
			+ 'You should use this list if you want to add or remove a few CSS ' 
			+ 'properties to original set. To add a new property, simply write its name, '
			+ 'to remove it, precede property with hyphen.<br>'
			+ 'For example, to add <em>foo</em> property and remove <em>border-radius</em> one, '
			+ 'the preference value will look like this: <code>foo, -border-radius</code>.');
	
	// properties list is created from cssFeatures.html file
	var props = {
		'webkit': 'animation, animation-delay, animation-direction, animation-duration, animation-fill-mode, animation-iteration-count, animation-name, animation-play-state, animation-timing-function, appearance, backface-visibility, background-clip, background-composite, background-origin, background-size, border-fit, border-horizontal-spacing, border-image, border-vertical-spacing, box-align, box-direction, box-flex, box-flex-group, box-lines, box-ordinal-group, box-orient, box-pack, box-reflect, box-shadow, color-correction, column-break-after, column-break-before, column-break-inside, column-count, column-gap, column-rule-color, column-rule-style, column-rule-width, column-span, column-width, dashboard-region, font-smoothing, highlight, hyphenate-character, hyphenate-limit-after, hyphenate-limit-before, hyphens, line-box-contain, line-break, line-clamp, locale, margin-before-collapse, margin-after-collapse, marquee-direction, marquee-increment, marquee-repetition, marquee-style, mask-attachment, mask-box-image, mask-box-image-outset, mask-box-image-repeat, mask-box-image-slice, mask-box-image-source, mask-box-image-width, mask-clip, mask-composite, mask-image, mask-origin, mask-position, mask-repeat, mask-size, nbsp-mode, perspective, perspective-origin, rtl-ordering, text-combine, text-decorations-in-effect, text-emphasis-color, text-emphasis-position, text-emphasis-style, text-fill-color, text-orientation, text-security, text-stroke-color, text-stroke-width, transform, transition, transform-origin, transform-style, transition-delay, transition-duration, transition-property, transition-timing-function, user-drag, user-modify, user-select, writing-mode, svg-shadow, box-sizing, border-radius',
		'moz': 'animation-delay, animation-direction, animation-duration, animation-fill-mode, animation-iteration-count, animation-name, animation-play-state, animation-timing-function, appearance, backface-visibility, background-inline-policy, binding, border-bottom-colors, border-image, border-left-colors, border-right-colors, border-top-colors, box-align, box-direction, box-flex, box-ordinal-group, box-orient, box-pack, box-shadow, box-sizing, column-count, column-gap, column-rule-color, column-rule-style, column-rule-width, column-width, float-edge, font-feature-settings, font-language-override, force-broken-image-icon, hyphens, image-region, orient, outline-radius-bottomleft, outline-radius-bottomright, outline-radius-topleft, outline-radius-topright, perspective, perspective-origin, stack-sizing, tab-size, text-blink, text-decoration-color, text-decoration-line, text-decoration-style, text-size-adjust, transform, transform-origin, transform-style, transition, transition-delay, transition-duration, transition-property, transition-timing-function, user-focus, user-input, user-modify, user-select, window-shadow, background-clip, border-radius',
		'ms': 'accelerator, backface-visibility, background-position-x, background-position-y, behavior, block-progression, box-align, box-direction, box-flex, box-line-progression, box-lines, box-ordinal-group, box-orient, box-pack, content-zoom-boundary, content-zoom-boundary-max, content-zoom-boundary-min, content-zoom-chaining, content-zoom-snap, content-zoom-snap-points, content-zoom-snap-type, content-zooming, filter, flow-from, flow-into, font-feature-settings, grid-column, grid-column-align, grid-column-span, grid-columns, grid-layer, grid-row, grid-row-align, grid-row-span, grid-rows, high-contrast-adjust, hyphenate-limit-chars, hyphenate-limit-lines, hyphenate-limit-zone, hyphens, ime-mode, interpolation-mode, layout-flow, layout-grid, layout-grid-char, layout-grid-line, layout-grid-mode, layout-grid-type, line-break, overflow-style, perspective, perspective-origin, perspective-origin-x, perspective-origin-y, scroll-boundary, scroll-boundary-bottom, scroll-boundary-left, scroll-boundary-right, scroll-boundary-top, scroll-chaining, scroll-rails, scroll-snap-points-x, scroll-snap-points-y, scroll-snap-type, scroll-snap-x, scroll-snap-y, scrollbar-arrow-color, scrollbar-base-color, scrollbar-darkshadow-color, scrollbar-face-color, scrollbar-highlight-color, scrollbar-shadow-color, scrollbar-track-color, text-align-last, text-autospace, text-justify, text-kashida-space, text-overflow, text-size-adjust, text-underline-position, touch-action, transform, transform-origin, transform-origin-x, transform-origin-y, transform-origin-z, transform-style, transition, transition-delay, transition-duration, transition-property, transition-timing-function, user-select, word-break, wrap-flow, wrap-margin, wrap-through, writing-mode',
		'o': 'dashboard-region, animation, animation-delay, animation-direction, animation-duration, animation-fill-mode, animation-iteration-count, animation-name, animation-play-state, animation-timing-function, border-image, link, link-source, object-fit, object-position, tab-size, table-baseline, transform, transform-origin, transition, transition-delay, transition-duration, transition-property, transition-timing-function, accesskey, input-format, input-required, marquee-dir, marquee-loop, marquee-speed, marquee-style'
	};
	
	_.each(props, function(v, k) {
		prefs.define('css.' + k + 'Properties', v, descTemplate({vendor: k}));
		prefs.define('css.' + k + 'PropertiesAddon', '', descAddonTemplate({vendor: k}));
	});
	
	prefs.define('css.unitlessProperties', 'z-index, line-height, opacity, font-weight, zoom', 
			'The list of properties whose values ​​must not contain units.');
	
	prefs.define('css.intUnit', 'px', 'Default unit for integer values');
	prefs.define('css.floatUnit', 'em', 'Default unit for float values');
	
	prefs.define('css.keywords', 'auto, inherit, all', 
			'A comma-separated list of valid keywords that can be used in CSS abbreviations.');
	
	prefs.define('css.keywordAliases', 'a:auto, i:inherit, s:solid, da:dashed, do:dotted, t:transparent', 
			'A comma-separated list of keyword aliases, used in CSS abbreviation. '
			+ 'Each alias should be defined as <code>alias:keyword_name</code>.');
	
	prefs.define('css.unitAliases', 'e:em, p:%, x:ex, r:rem', 
			'A comma-separated list of unit aliases, used in CSS abbreviation. '
			+ 'Each alias should be defined as <code>alias:unit_value</code>.');
	
	prefs.define('css.color.short', true, 
			'Should color values like <code>#ffffff</code> be shortened to '
			+ '<code>#fff</code> after abbreviation with color was expanded.');
	
	prefs.define('css.color.case', 'keep', 
			'Letter case of color values generated by abbreviations with color '
			+ '(like <code>c#0</code>). Possible values are <code>upper</code>, '
			+ '<code>lower</code> and <code>keep</code>.');
	
	prefs.define('css.fuzzySearch', true, 
			'Enable fuzzy search among CSS snippet names. When enabled, every ' 
			+ '<em>unknown</em> snippet will be scored against available snippet '
			+ 'names (not values or CSS properties!). The match with best score '
			+ 'will be used to resolve snippet value. For example, with this ' 
			+ 'preference enabled, the following abbreviations are equal: '
			+ '<code>ov:h</code> == <code>ov-h</code> == <code>o-h</code> == '
			+ '<code>oh</code>');
	
	prefs.define('css.fuzzySearchMinScore', 0.3, 
			'The minium score (from 0 to 1) that fuzzy-matched abbreviation should ' 
			+ 'achive. Lower values may produce many false-positive matches, '
			+ 'higher values may reduce possible matches.');
	
	prefs.define('css.alignVendor', false, 
			'If set to <code>true</code>, all generated vendor-prefixed properties ' 
			+ 'will be aligned by real property name.');
	
	
	function isNumeric(ch) {
		var code = ch && ch.charCodeAt(0);
		return (ch && ch == '.' || (code > 47 && code < 58));
	}
	
	/**
	 * Check if provided snippet contains only one CSS property and value.
	 * @param {String} snippet
	 * @returns {Boolean}
	 */
	function isSingleProperty(snippet) {
		snippet = utils.trim(snippet);
		
		// check if it doesn't contain a comment and a newline
		if (/\/\*|\n|\r/.test(snippet)) {
			return false;
		}
		
		// check if it's a valid snippet definition
		if (!/^[a-z0-9\-]+\s*\:/i.test(snippet)) {
			return false;
		}
		
		return snippet.replace(/\$\{.+?\}/g, '').split(':').length == 2;
	}
	
	/**
	 * Normalizes abbreviated value to final CSS one
	 * @param {String} value
	 * @returns {String}
	 */
	function normalizeValue(value) {
		if (value.charAt(0) == '-' && !/^\-[\.\d]/.test(value)) {
			value = value.replace(/^\-+/, '');
		}
		
		var ch = value.charAt(0);
		if (ch == '#') {
			return normalizeHexColor(value);
		}

		if (ch == '$') {
			return utils.escapeText(value);
		}

		return getKeyword(value);
	}
	
	function normalizeHexColor(value) {
		var hex = value.replace(/^#+/, '') || '0';
		if (hex.toLowerCase() == 't') {
			return 'transparent';
		}

		var opacity = '';
		hex = hex.replace(/\.(\d+)$/, function(str) {
			opacity = '0' + str;
			return '';
		});
		
		var repeat = utils.repeatString;
		var color = null;
		switch (hex.length) {
			case 1:
				color = repeat(hex, 6);
				break;
			case 2:
				color = repeat(hex, 3);
				break;
			case 3:
				color = hex.charAt(0) + hex.charAt(0) + hex.charAt(1) + hex.charAt(1) + hex.charAt(2) + hex.charAt(2);
				break;
			case 4:
				color = hex + hex.substr(0, 2);
				break;
			case 5:
				color = hex + hex.charAt(0);
				break;
			default:
				color = hex.substr(0, 6);
		}

		if (opacity) {
			return toRgba(color, opacity);
		}
		
		// color must be shortened?
		if (prefs.get('css.color.short')) {
			var p = color.split('');
			if (p[0] == p[1] && p[2] == p[3] && p[4] == p[5]) {
				color = p[0] + p[2] + p[4];
			}
		}
		
		// should transform case?
		switch (prefs.get('css.color.case')) {
			case 'upper':
				color = color.toUpperCase();
				break;
			case 'lower':
				color = color.toLowerCase();
				break;
		}
		
		return '#' + color;
	}

	/**
	 * Transforms HEX color definition into RGBA one
	 * @param  {String} color   HEX color, 6 characters
	 * @param  {String} opacity Opacity value
	 * @return {String}
	 */
	function toRgba(color, opacity) {
		var r = parseInt(color.substr(0, 2), 16);
		var g = parseInt(color.substr(2, 2), 16);
		var b = parseInt(color.substr(4, 2), 16);

		return 'rgba(' + [r, g, b, opacity].join(', ') + ')';
	}
	
	function getKeyword(name) {
		var aliases = prefs.getDict('css.keywordAliases');
		return name in aliases ? aliases[name] : name;
	}
	
	function getUnit(name) {
		var aliases = prefs.getDict('css.unitAliases');
		return name in aliases ? aliases[name] : name;
	}
	
	function isValidKeyword(keyword) {
		return _.include(prefs.getArray('css.keywords'), getKeyword(keyword));
	}
	
	/**
	 * Check if passed CSS property support specified vendor prefix 
	 * @param {String} property
	 * @param {String} prefix
	 */
	function hasPrefix(property, prefix) {
		var info = vendorPrefixes[prefix];
		
		if (!info)
			info = _.find(vendorPrefixes, function(data) {
				return data.prefix == prefix;
			});
		
		return info && info.supports(property);
	}

	/**
	 * Finds available vendor prefixes for given CSS property.
	 * Search is performed within Can I Use database and internal
	 * property list
	 * @param  {String} property CSS property name
	 * @return {Array} Array of resolved prefixes or null if
	 * prefixes are not available for this property at all.
	 * Empty array means prefixes are not available for current
	 * user-define era
	 */
	function findVendorPrefixes(property) {
		var prefixes = ciu.resolvePrefixes(property);
		if (!prefixes) {
			// Can I Use database is disabled or prefixes are not
			// available for this property
			prefixes = [];
			_.each(vendorPrefixes, function(obj, key) {
				if (hasPrefix(property, key)) {
					prefixes.push(obj.prefix);
				}
			});

			if (!prefixes.length) {
				prefixes = null;
			}
		}

		return prefixes;
	}
	
	/**
	 * Search for a list of supported prefixes for CSS property. This list
	 * is used to generate all-prefixed snippet
	 * @param {String} property CSS property name
	 * @returns {Array}
	 */
	function findInternalPrefixes(property, noAutofill) {
		var result = [];
		var prefixes = findVendorPrefixes(property);
		
		if (prefixes) {
			var prefixMap = {};
			_.each(vendorPrefixes, function(obj, name) {
				prefixMap[obj.prefix] = name;
			});

			result = _.map(prefixes, function(prefix) {
				return prefixMap[prefix];
			});
		}
		
		if (!result.length && !noAutofill) {
			// add all non-obsolete prefixes
			_.each(vendorPrefixes, function(obj, prefix) {
				if (!obj.obsolete)
					result.push(prefix);
			});
		}
		
		return result;
	}
	
	function addPrefix(name, obj) {
		if (_.isString(obj))
			obj = {prefix: obj};
		
		vendorPrefixes[name] = _.extend({}, prefixObj, obj);
	}
	
	function getSyntaxPreference(name, syntax) {
		if (syntax) {
			// hacky alias for Stylus dialect
			if (syntax == 'styl') {
				syntax = 'stylus';
			}

			var val = prefs.get(syntax + '.' + name);
			if (!_.isUndefined(val))
				return val;
		}
		
		return prefs.get('css.' + name);
	}
	
	/**
	 * Format CSS property according to current syntax dialect
	 * @param {String} property
	 * @param {String} syntax
	 * @returns {String}
	 */
	function formatProperty(property, syntax) {
		var ix = property.indexOf(':');
		property = property.substring(0, ix).replace(/\s+$/, '') 
			+ getSyntaxPreference('valueSeparator', syntax)
			+ utils.trim(property.substring(ix + 1));
		
		return property.replace(/\s*;\s*$/, getSyntaxPreference('propertyEnd', syntax));
	}
	
	/**
	 * Transforms snippet value if required. For example, this transformation
	 * may add <i>!important</i> declaration to CSS property
	 * @param {String} snippet
	 * @param {Boolean} isImportant
	 * @returns {String}
	 */
	function transformSnippet(snippet, isImportant, syntax) {
		if (!_.isString(snippet))
			snippet = snippet.data;
		
		if (!isSingleProperty(snippet))
			return snippet;
		
		if (isImportant) {
			if (~snippet.indexOf(';')) {
				snippet = snippet.split(';').join(' !important;');
			} else {
				snippet += ' !important';
			}
		}
		
		return formatProperty(snippet, syntax);
	}
	
	function getProperties(key) {
		var list = prefs.getArray(key);
		_.each(prefs.getArray(key + 'Addon'), function(prop) {
			if (prop.charAt(0) == '-') {
				list = _.without(list, prop.substr(1));
			} else {
				if (prop.charAt(0) == '+')
					prop = prop.substr(1);
				
				list.push(prop);
			}
		});
		
		return list;
	}

	/**
	 * Tries to produce properties with vendor-prefixed value
	 * @param  {Object} snippetObj Parsed snippet object
	 * @return {Array} Array of properties with prefixed values
	 */
	function resolvePrefixedValues(snippetObj, isImportant, syntax) {
		var prefixes = [];
		var lookup = {};

		var parts = cssEditTree.findParts(snippetObj.value);
		parts.reverse();
		_.each(parts, function(p) {
			var partValue = p.substring(snippetObj.value);
			_.each(findVendorPrefixes(partValue), function(prefix) {
				if (!lookup[prefix]) {
					lookup[prefix] = snippetObj.value;
					prefixes.push(prefix);
				}

				lookup[prefix] = utils.replaceSubstring(lookup[prefix], '-' + prefix + '-' + partValue, p);
			});
		});

		return _.map(prefixes, function(prefix) {
			return transformSnippet(snippetObj.name + ':' + lookup[prefix], isImportant, syntax);
		});
	}
	
	
	// TODO refactor, this looks awkward now
	addPrefix('w', {
		prefix: 'webkit'
	});
	addPrefix('m', {
		prefix: 'moz'
	});
	addPrefix('s', {
		prefix: 'ms'
	});
	addPrefix('o', {
		prefix: 'o'
	});
	
	
	module = module || {};
	module.exports = {
		/**
		 * Adds vendor prefix
		 * @param {String} name One-character prefix name
		 * @param {Object} obj Object describing vendor prefix
		 * @memberOf cssResolver
		 */
		addPrefix: addPrefix,
		
		/**
		 * Check if passed CSS property supports specified vendor prefix
		 * @param {String} property
		 * @param {String} prefix
		 */
		supportsPrefix: hasPrefix,

		resolve: function(node, syntax) {
			var cssSyntaxes = prefs.getArray('css.syntaxes');
			if (_.include(cssSyntaxes, syntax) && node.isElement()) {
				return this.expandToSnippet(node.abbreviation, syntax);
			}
			
			return null;
		},

		/**
		 * Returns prefixed version of passed CSS property, only if this
		 * property supports such prefix
		 * @param {String} property
		 * @param {String} prefix
		 * @returns
		 */
		prefixed: function(property, prefix) {
			return hasPrefix(property, prefix) 
				? '-' + prefix + '-' + property 
				: property;
		},
		
		/**
		 * Returns list of all registered vendor prefixes
		 * @returns {Array}
		 */
		listPrefixes: function() {
			return _.map(vendorPrefixes, function(obj) {
				return obj.prefix;
			});
		},
		
		/**
		 * Returns object describing vendor prefix
		 * @param {String} name
		 * @returns {Object}
		 */
		getPrefix: function(name) {
			return vendorPrefixes[name];
		},
		
		/**
		 * Removes prefix object
		 * @param {String} name
		 */
		removePrefix: function(name) {
			if (name in vendorPrefixes)
				delete vendorPrefixes[name];
		},
		
		/**
		 * Extract vendor prefixes from abbreviation
		 * @param {String} abbr
		 * @returns {Object} Object containing array of prefixes and clean 
		 * abbreviation name
		 */
		extractPrefixes: function(abbr) {
			if (abbr.charAt(0) != '-') {
				return {
					property: abbr,
					prefixes: null
				};
			}
			
			// abbreviation may either contain sequence of one-character prefixes
			// or just dash, meaning that user wants to produce all possible
			// prefixed properties
			var i = 1, il = abbr.length, ch;
			var prefixes = [];
			
			while (i < il) {
				ch = abbr.charAt(i);
				if (ch == '-') {
					// end-sequence character found, stop searching
					i++;
					break;
				}
				
				if (ch in vendorPrefixes) {
					prefixes.push(ch);
				} else {
					// no prefix found, meaning user want to produce all
					// vendor-prefixed properties
					prefixes.length = 0;
					i = 1;
					break;
				}
				
				i++;
			}
			
			// reached end of abbreviation and no property name left
			if (i == il -1) {
				i = 1;
				prefixes.length = 1;
			}
			
			return {
				property: abbr.substring(i),
				prefixes: prefixes.length ? prefixes : 'all'
			};
		},
		
		/**
		 * Search for value substring in abbreviation
		 * @param {String} abbr
		 * @returns {String} Value substring
		 */
		findValuesInAbbreviation: function(abbr, syntax) {
			syntax = syntax || 'css';
			
			var i = 0, il = abbr.length, value = '', ch;
			while (i < il) {
				ch = abbr.charAt(i);
				if (isNumeric(ch) || ch == '#' || ch == '$' || (ch == '-' && isNumeric(abbr.charAt(i + 1)))) {
					value = abbr.substring(i);
					break;
				}
				
				i++;
			}
			
			// try to find keywords in abbreviation
			var property = abbr.substring(0, abbr.length - value.length);
			var keywords = [];
			// try to extract some commonly-used properties
			while (~property.indexOf('-') && !resources.findSnippet(syntax, property)) {
				var parts = property.split('-');
				var lastPart = parts.pop();
				if (!isValidKeyword(lastPart)) {
					break;
				}
				
				keywords.unshift(lastPart);
				property = parts.join('-');
			}

			return keywords.join('-') + value;
		},
		
		parseValues: function(str) {
			/** @type StringStream */
			var stream = stringStream.create(str);
			var values = [];
			var ch = null;
			
			while ((ch = stream.next())) {
				if (ch == '$') {
					stream.match(/^[^\$]+/, true);
					values.push(stream.current());
				} else if (ch == '#') {
					stream.match(/^t|[0-9a-f]+(\.\d+)?/i, true);
					values.push(stream.current());
				} else if (ch == '-') {
					if (isValidKeyword(_.last(values)) || 
							( stream.start && isNumeric(str.charAt(stream.start - 1)) )
						) {
						stream.start = stream.pos;
					}
					
					stream.match(/^\-?[0-9]*(\.[0-9]+)?[a-z%\.]*/, true);
					values.push(stream.current());
				} else {
					stream.match(/^[0-9]*(\.[0-9]*)?[a-z%]*/, true);
					values.push(stream.current());
				}
				
				stream.start = stream.pos;
			}
			
			return _.map(_.compact(values), normalizeValue);
		},
		
		/**
		 * Extracts values from abbreviation
		 * @param {String} abbr
		 * @returns {Object} Object containing array of values and clean 
		 * abbreviation name
		 */
		extractValues: function(abbr) {
			// search for value start
			var abbrValues = this.findValuesInAbbreviation(abbr);
			if (!abbrValues) {
				return {
					property: abbr,
					values: null
				};
			}
			
			return {
				property: abbr.substring(0, abbr.length - abbrValues.length).replace(/-$/, ''),
				values: this.parseValues(abbrValues)
			};
		},
		
		/**
		 * Normalizes value, defined in abbreviation.
		 * @param {String} value
		 * @param {String} property
		 * @returns {String}
		 */
		normalizeValue: function(value, property) {
			property = (property || '').toLowerCase();
			var unitlessProps = prefs.getArray('css.unitlessProperties');
			return value.replace(/^(\-?[0-9\.]+)([a-z]*)$/, function(str, val, unit) {
				if (!unit && (val == '0' || _.include(unitlessProps, property)))
					return val;
				
				if (!unit)
					return val.replace(/\.$/, '') + prefs.get(~val.indexOf('.') ? 'css.floatUnit' : 'css.intUnit');
				
				return val + getUnit(unit);
			});
		},
		
		/**
		 * Expands abbreviation into a snippet
		 * @param {String} abbr Abbreviation name to expand
		 * @param {String} value Abbreviation value
		 * @param {String} syntax Currect syntax or dialect. Default is 'css'
		 * @returns {Object} Array of CSS properties and values or predefined
		 * snippet (string or element)
		 */
		expand: function(abbr, value, syntax) {
			syntax = syntax || 'css';
			var autoInsertPrefixes = prefs.get(syntax + '.autoInsertVendorPrefixes');
			
			// check if snippet should be transformed to !important
			var isImportant = /^(.+)\!$/.test(abbr);
			if (isImportant) {
				abbr = RegExp.$1;
			}

			// check if we have abbreviated resource
			var snippet = resources.findSnippet(syntax, abbr);
			if (snippet && !autoInsertPrefixes) {
				return transformSnippet(snippet, isImportant, syntax);
			}
			
			// no abbreviated resource, parse abbreviation
			var prefixData = this.extractPrefixes(abbr);
			var valuesData = this.extractValues(prefixData.property);
			var abbrData = _.extend(prefixData, valuesData);

			if (!snippet) {
				snippet = resources.findSnippet(syntax, abbrData.property);
			} else {
				abbrData.values = null;
			}
			
			if (!snippet && prefs.get('css.fuzzySearch')) {
				// let’s try fuzzy search
				snippet = resources.fuzzyFindSnippet(syntax, abbrData.property, parseFloat(prefs.get('css.fuzzySearchMinScore')));
			}
			
			if (!snippet) {
				if (!abbrData.property) {
					return null;
				}
				snippet = abbrData.property + ':' + defaultValue;
			} else if (!_.isString(snippet)) {
				snippet = snippet.data;
			}
			
			if (!isSingleProperty(snippet)) {
				return snippet;
			}
			
			var snippetObj = this.splitSnippet(snippet);
			var result = [];
			if (!value && abbrData.values) {
				value = _.map(abbrData.values, function(val) {
					return this.normalizeValue(val, snippetObj.name);
				}, this).join(' ') + ';';
			}
			
			snippetObj.value = value || snippetObj.value;

			var prefixes = abbrData.prefixes == 'all' || (!abbrData.prefixes && autoInsertPrefixes) 
				? findInternalPrefixes(snippetObj.name, autoInsertPrefixes && abbrData.prefixes != 'all')
				: abbrData.prefixes;
				
				
			var names = [], propName;
			_.each(prefixes, function(p) {
				if (p in vendorPrefixes) {
					propName = vendorPrefixes[p].transformName(snippetObj.name);
					names.push(propName);
					result.push(transformSnippet(propName + ':' + snippetObj.value,
							isImportant, syntax));
				}
			});
			
			// put the original property
			result.push(transformSnippet(snippetObj.name + ':' + snippetObj.value, isImportant, syntax));
			names.push(snippetObj.name);

			result = resolvePrefixedValues(snippetObj, isImportant, syntax).concat(result);
			
			if (prefs.get('css.alignVendor')) {
				var pads = utils.getStringsPads(names);
				result = _.map(result, function(prop, i) {
					return pads[i] + prop;
				});
			}
			
			return result;
		},
		
		/**
		 * Same as <code>expand</code> method but transforms output into 
		 * Emmet snippet
		 * @param {String} abbr
		 * @param {String} syntax
		 * @returns {String}
		 */
		expandToSnippet: function(abbr, syntax) {
			var snippet = this.expand(abbr, null, syntax);
			if (snippet === null) {
				return null;
			}

			if (_.isArray(snippet)) {
				return snippet.join('\n');
			}
			
			if (!_.isString(snippet)) {
				return snippet.data;
			}
			
			return snippet + '';
		},
		
		/**
		 * Split snippet into a CSS property-value pair
		 * @param {String} snippet
		 */
		splitSnippet: function(snippet) {
			snippet = utils.trim(snippet);
			if (snippet.indexOf(':') == -1) {
				return {
					name: snippet,
					value: defaultValue
				};
			}
			
			var pair = snippet.split(':');
			
			return {
				name: utils.trim(pair.shift()),
				// replace ${0} tabstop to produce valid vendor-prefixed values
				// where possible
				value: utils.trim(pair.join(':')).replace(/^(\$\{0\}|\$0)(\s*;?)$/, '${1}$2')
			};
		},
		
		getSyntaxPreference: getSyntaxPreference,
		transformSnippet: transformSnippet,
		vendorPrefixes: findVendorPrefixes
	};

	return module.exports;
});
/**
 * Parsed resources (snippets, abbreviations, variables, etc.) for Emmet.
 * Contains convenient method to get access for snippets with respect of 
 * inheritance. Also provides ability to store data in different vocabularies
 * ('system' and 'user') for fast and safe resource update
 * @author Sergey Chikuyonok (serge.che@gmail.com)
 * @link http://chikuyonok.ru
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/resources',['require','exports','module','lodash','./handlerList','../utils/common','./elements','../assets/logger','../vendor/stringScore','../resolver/css'],function(require, exports, module) {
	var _ = require('lodash');
	var handlerList = require('./handlerList');
	var utils = require('../utils/common');
	var elements = require('./elements');
	var logger = require('../assets/logger');
	var stringScore = require('../vendor/stringScore');
	var cssResolver = require('../resolver/css');

	var VOC_SYSTEM = 'system';
	var VOC_USER = 'user';
	
	var cache = {};
		
	/** Regular expression for XML tag matching */
	var reTag = /^<(\w+\:?[\w\-]*)((?:\s+[@\!]?[\w\:\-]+\s*=\s*(['"]).*?\3)*)\s*(\/?)>/;
		
	var systemSettings = {};
	var userSettings = {};
	
	/** @type HandlerList List of registered abbreviation resolvers */
	var resolvers = handlerList.create();
	
	/**
	 * Normalizes caret plceholder in passed text: replaces | character with
	 * default caret placeholder
	 * @param {String} text
	 * @returns {String}
	 */
	function normalizeCaretPlaceholder(text) {
		return utils.replaceUnescapedSymbol(text, '|', utils.getCaretPlaceholder());
	}
	
	function parseItem(name, value, type) {
		value = normalizeCaretPlaceholder(value);
		
		if (type == 'snippets') {
			return elements.create('snippet', value);
		}
		
		if (type == 'abbreviations') {
			return parseAbbreviation(name, value);
		}
	}
	
	/**
	 * Parses single abbreviation
	 * @param {String} key Abbreviation name
	 * @param {String} value Abbreviation value
	 * @return {Object}
	 */
	function parseAbbreviation(key, value) {
		key = utils.trim(key);
		var m;
		if ((m = reTag.exec(value))) {
			return elements.create('element', m[1], m[2], m[4] == '/');
		} else {
			// assume it's reference to another abbreviation
			return elements.create('reference', value);
		}
	}
	
	/**
	 * Normalizes snippet key name for better fuzzy search
	 * @param {String} str
	 * @returns {String}
	 */
	function normalizeName(str) {
		return str.replace(/:$/, '').replace(/:/g, '-');
	}

	function expandSnippetsDefinition(snippets) {
		var out = {};
		_.each(snippets, function(val, key) {
			var items = key.split('|');
			// do not use iterators for better performance
			for (var i = items.length - 1; i >= 0; i--) {
				out[items[i]] = val;
			}
		});

		return out;
	}

	_.extend(exports, {
		/**
		 * Sets new unparsed data for specified settings vocabulary
		 * @param {Object} data
		 * @param {String} type Vocabulary type ('system' or 'user')
		 * @memberOf resources
		 */
		setVocabulary: function(data, type) {
			cache = {};

			// sections like "snippets" and "abbreviations" could have
			// definitions like `"f|fs": "fieldset"` which is the same as distinct
			// "f" and "fs" keys both equals to "fieldset".
			// We should parse these definitions first
			var voc = {};
			_.each(data, function(section, syntax) {
				var _section = {};
				_.each(section, function(subsection, name) {
					if (name == 'abbreviations' || name == 'snippets') {
						subsection = expandSnippetsDefinition(subsection);
					}
					_section[name] = subsection;
				});

				voc[syntax] = _section;
			});
			 

			if (type == VOC_SYSTEM) {
				systemSettings = voc;
			} else {
				userSettings = voc;
			}
		},
		
		/**
		 * Returns resource vocabulary by its name
		 * @param {String} name Vocabulary name ('system' or 'user')
		 * @return {Object}
		 */
		getVocabulary: function(name) {
			return name == VOC_SYSTEM ? systemSettings : userSettings;
		},
		
		/**
		 * Returns resource (abbreviation, snippet, etc.) matched for passed 
		 * abbreviation
		 * @param {AbbreviationNode} node
		 * @param {String} syntax
		 * @returns {Object}
		 */
		getMatchedResource: function(node, syntax) {
			return resolvers.exec(null, _.toArray(arguments)) 
				|| this.findSnippet(syntax, node.name());
		},
		
		/**
		 * Returns variable value
		 * @return {String}
		 */
		getVariable: function(name) {
			return (this.getSection('variables') || {})[name];
		},
		
		/**
		 * Store runtime variable in user storage
		 * @param {String} name Variable name
		 * @param {String} value Variable value
		 */
		setVariable: function(name, value){
			var voc = this.getVocabulary('user') || {};
			if (!('variables' in voc))
				voc.variables = {};
				
			voc.variables[name] = value;
			this.setVocabulary(voc, 'user');
		},
		
		/**
		 * Check if there are resources for specified syntax
		 * @param {String} syntax
		 * @return {Boolean}
		 */
		hasSyntax: function(syntax) {
			return syntax in this.getVocabulary(VOC_USER) 
				|| syntax in this.getVocabulary(VOC_SYSTEM);
		},
		
		/**
		 * Registers new abbreviation resolver.
		 * @param {Function} fn Abbreviation resolver which will receive 
		 * abbreviation as first argument and should return parsed abbreviation
		 * object if abbreviation has handled successfully, <code>null</code>
		 * otherwise
		 * @param {Object} options Options list as described in 
		 * {@link HandlerList#add()} method
		 */
		addResolver: function(fn, options) {
			resolvers.add(fn, options);
		},
		
		removeResolver: function(fn) {
			resolvers.remove(fn);
		},
		
		/**
		 * Returns actual section data, merged from both
		 * system and user data
		 * @param {String} name Section name (syntax)
		 * @param {String} ...args Subsections
		 * @returns
		 */
		getSection: function(name) {
			if (!name)
				return null;
			
			if (!(name in cache)) {
				cache[name] = utils.deepMerge({}, systemSettings[name], userSettings[name]);
			}
			
			var data = cache[name], subsections = _.rest(arguments), key;
			while (data && (key = subsections.shift())) {
				if (key in data) {
					data = data[key];
				} else {
					return null;
				}
			}
			
			return data;
		},
		
		/**
		 * Recursively searches for a item inside top level sections (syntaxes)
		 * with respect of `extends` attribute
		 * @param {String} topSection Top section name (syntax)
		 * @param {String} subsection Inner section name
		 * @returns {Object}
		 */
		findItem: function(topSection, subsection) {
			var data = this.getSection(topSection);
			while (data) {
				if (subsection in data)
					return data[subsection];
				
				data = this.getSection(data['extends']);
			}
		},
		
		/**
		 * Recursively searches for a snippet definition inside syntax section.
		 * Definition is searched inside `snippets` and `abbreviations` 
		 * subsections  
		 * @param {String} syntax Top-level section name (syntax)
		 * @param {String} name Snippet name
		 * @returns {Object}
		 */
		findSnippet: function(syntax, name, memo) {
			if (!syntax || !name)
				return null;
			
			memo = memo || [];
			
			var names = [name];
			// create automatic aliases to properties with colons,
			// e.g. pos-a == pos:a
			if (~name.indexOf('-')) {
				names.push(name.replace(/\-/g, ':'));
			}
			
			var data = this.getSection(syntax), matchedItem = null;
			_.find(['snippets', 'abbreviations'], function(sectionName) {
				var data = this.getSection(syntax, sectionName);
				if (data) {
					return _.find(names, function(n) {
						if (data[n]) {
							return matchedItem = parseItem(n, data[n], sectionName);
						}
					});
				}
			}, this);
			
			memo.push(syntax);
			if (!matchedItem && data['extends'] && !_.include(memo, data['extends'])) {
				// try to find item in parent syntax section
				return this.findSnippet(data['extends'], name, memo);
			}
			
			return matchedItem;
		},
		
		/**
		 * Performs fuzzy search of snippet definition
		 * @param {String} syntax Top-level section name (syntax)
		 * @param {String} name Snippet name
		 * @returns
		 */
		fuzzyFindSnippet: function(syntax, name, minScore) {
			var result = this.fuzzyFindMatches(syntax, name, minScore)[0];
			if (result) {
				return result.value.parsedValue;
			}
		},

		fuzzyFindMatches: function(syntax, name, minScore) {
			minScore = minScore || 0.3;
			name = normalizeName(name);
			
			var result = _(this.getAllSnippets(syntax))
				.map(function(value, key) {
					return {
						key: key,
						score: stringScore.score(value.nk, name, 0.1),
						value: value
					};
				})
				.filter(function(item) {
					return item.score >= minScore;
				})
				.sortBy('score')
				.valueOf();

			result.reverse();
			return result;
		},
		
		/**
		 * Returns plain dictionary of all available abbreviations and snippets
		 * for specified syntax with respect of inheritance
		 * @param {String} syntax
		 * @returns {Object}
		 */
		getAllSnippets: function(syntax) {
			var cacheKey = 'all-' + syntax;
			if (!cache[cacheKey]) {
				var stack = [], sectionKey = syntax;
				var memo = [];
				
				do {
					var section = this.getSection(sectionKey);
					if (!section)
						break;
					
					_.each(['snippets', 'abbreviations'], function(sectionName) {
						var stackItem = {};
						_.each(section[sectionName] || null, function(v, k) {
							stackItem[k] = {
								nk: normalizeName(k),
								value: v,
								parsedValue: parseItem(k, v, sectionName),
								type: sectionName
							};
						});
						
						stack.push(stackItem);
					});
					
					memo.push(sectionKey);
					sectionKey = section['extends'];
				} while (sectionKey && !_.include(memo, sectionKey));
				
				
				cache[cacheKey] = _.extend.apply(_, stack.reverse());
			}
			
			return cache[cacheKey];
		},

		/**
		 * Returns newline character
		 * @returns {String}
		 */
		getNewline: function() {
			var nl = this.getVariable('newline');
			return _.isString(nl) ? nl : '\n';
		},
		
		/**
		 * Sets new newline character that will be used in output
		 * @param {String} str
		 */
		setNewline: function(str) {
			this.setVariable('newline', str);
			this.setVariable('nl', str);
		}
	});

	// XXX add default resolvers
	exports.addResolver(_.bind(cssResolver.resolve, cssResolver));

	// try to load snippets
	// hide it from Require.JS parser
	(function(r) {
		if (typeof define === 'undefined' || !define.amd) {
			var fs = r('fs');
			var path = r('path');
			
			var defaultSnippets = fs.readFileSync(path.join(__dirname, '../snippets.json'), {encoding: 'utf8'});
			exports.setVocabulary(JSON.parse(defaultSnippets), VOC_SYSTEM);
		}
	})(require);
	

	return exports;
});
/**
 * Utility module for handling tabstops tokens generated by Emmet's 
 * "Expand Abbreviation" action. The main <code>extract</code> method will take
 * raw text (for example: <i>${0} some ${1:text}</i>), find all tabstops 
 * occurrences, replace them with tokens suitable for your editor of choice and 
 * return object with processed text and list of found tabstops and their ranges.
 * For sake of portability (Objective-C/Java) the tabstops list is a plain 
 * sorted array with plain objects.
 * 
 * Placeholders with the same are meant to be <i>linked</i> in your editor.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/tabStops',['require','exports','module','lodash','../utils/common','./stringStream','./resources'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var stringStream = require('./stringStream');
	var resources = require('./resources');

	/**
	 * Global placeholder value, automatically incremented by 
	 * <code>variablesResolver()</code> function
	 */
	var startPlaceholderNum = 100;
	var tabstopIndex = 0;
	
	var defaultOptions = {
		replaceCarets: false,
		escape: function(ch) {
			return '\\' + ch;
		},
		tabstop: function(data) {
			return data.token;
		},
		variable: function(data) {
			return data.token;
		}
	};
	
	return {
		/**
		 * Main function that looks for a tabstops in provided <code>text</code>
		 * and returns a processed version of <code>text</code> with expanded 
		 * placeholders and list of tabstops found.
		 * @param {String} text Text to process
		 * @param {Object} options List of processor options:<br>
		 * 
		 * <b>replaceCarets</b> : <code>Boolean</code> — replace all default
		 * caret placeholders (like <i>{%::emmet-caret::%}</i>) with <i>${0:caret}</i><br>
		 * 
		 * <b>escape</b> : <code>Function</code> — function that handle escaped
		 * characters (mostly '$'). By default, it returns the character itself 
		 * to be displayed as is in output, but sometimes you will use 
		 * <code>extract</code> method as intermediate solution for further 
		 * processing and want to keep character escaped. Thus, you should override
		 * <code>escape</code> method to return escaped symbol (e.g. '\\$')<br>
		 * 
		 * <b>tabstop</b> : <code>Function</code> – a tabstop handler. Receives 
		 * a single argument – an object describing token: its position, number 
		 * group, placeholder and token itself. Should return a replacement 
		 * string that will appear in final output
		 * 
		 * <b>variable</b> : <code>Function</code> – variable handler. Receives 
		 * a single argument – an object describing token: its position, name 
		 * and original token itself. Should return a replacement 
		 * string that will appear in final output
		 * 
		 * @returns {Object} Object with processed <code>text</code> property
		 * and array of <code>tabstops</code> found
		 * @memberOf tabStops
		 */
		extract: function(text, options) {
			// prepare defaults
			var placeholders = {carets: ''};
			var marks = [];
			
			options = _.extend({}, defaultOptions, options, {
				tabstop: function(data) {
					var token = data.token;
					var ret = '';
					if (data.placeholder == 'cursor') {
						marks.push({
							start: data.start,
							end: data.start + token.length,
							group: 'carets',
							value: ''
						});
					} else {
						// unify placeholder value for single group
						if ('placeholder' in data)
							placeholders[data.group] = data.placeholder;
						
						if (data.group in placeholders)
							ret = placeholders[data.group];
						
						marks.push({
							start: data.start,
							end: data.start + token.length,
							group: data.group,
							value: ret
						});
					}
					
					return token;
				}
			});
			
			if (options.replaceCarets) {
				text = text.replace(new RegExp( utils.escapeForRegexp( utils.getCaretPlaceholder() ), 'g'), '${0:cursor}');
			}
			
			// locate tabstops and unify group's placeholders
			text = this.processText(text, options);
			
			// now, replace all tabstops with placeholders
			var buf = '', lastIx = 0;
			var tabStops = _.map(marks, function(mark) {
				buf += text.substring(lastIx, mark.start);
				
				var pos = buf.length;
				var ph = placeholders[mark.group] || '';
				
				buf += ph;
				lastIx = mark.end;
				
				return {
					group: mark.group,
					start: pos,
					end:  pos + ph.length
				};
			});
			
			buf += text.substring(lastIx);
			
			return {
				text: buf,
				tabstops: _.sortBy(tabStops, 'start')
			};
		},
		
		/**
		 * Text processing routine. Locates escaped characters and tabstops and
		 * replaces them with values returned by handlers defined in 
		 * <code>options</code>
		 * @param {String} text
		 * @param {Object} options See <code>extract</code> method options 
		 * description
		 * @returns {String}
		 */
		processText: function(text, options) {
			options = _.extend({}, defaultOptions, options);
			
			var buf = '';
			/** @type StringStream */
			var stream = stringStream.create(text);
			var ch, m, a;
			
			while ((ch = stream.next())) {
				if (ch == '\\' && !stream.eol()) {
					// handle escaped character
					buf += options.escape(stream.next());
					continue;
				}
				
				a = ch;
				
				if (ch == '$') {
					// looks like a tabstop
					stream.start = stream.pos - 1;
					
					if ((m = stream.match(/^[0-9]+/))) {
						// it's $N
						a = options.tabstop({
							start: buf.length, 
							group: stream.current().substr(1),
							token: stream.current()
						});
					} else if ((m = stream.match(/^\{([a-z_\-][\w\-]*)\}/))) {
						// ${variable}
						a = options.variable({
							start: buf.length, 
							name: m[1],
							token: stream.current()
						});
					} else if ((m = stream.match(/^\{([0-9]+)(:.+?)?\}/, false))) {
						// ${N:value} or ${N} placeholder
						// parse placeholder, including nested ones
						stream.skipToPair('{', '}');
						
						var obj = {
							start: buf.length, 
							group: m[1],
							token: stream.current()
						};
						
						var placeholder = obj.token.substring(obj.group.length + 2, obj.token.length - 1);
						
						if (placeholder) {
							obj.placeholder = placeholder.substr(1);
						}
						
						a = options.tabstop(obj);
					}
				}
				
				buf += a;
			}
			
			return buf;
		},
		
		/**
		 * Upgrades tabstops in output node in order to prevent naming conflicts
		 * @param {AbbreviationNode} node
		 * @param {Number} offset Tab index offset
		 * @returns {Number} Maximum tabstop index in element
		 */
		upgrade: function(node, offset) {
			var maxNum = 0;
			var options = {
				tabstop: function(data) {
					var group = parseInt(data.group, 10);
					if (group > maxNum) maxNum = group;
						
					if (data.placeholder)
						return '${' + (group + offset) + ':' + data.placeholder + '}';
					else
						return '${' + (group + offset) + '}';
				}
			};
			
			_.each(['start', 'end', 'content'], function(p) {
				node[p] = this.processText(node[p], options);
			}, this);
			
			return maxNum;
		},
		
		/**
		 * Helper function that produces a callback function for 
		 * <code>replaceVariables()</code> method from {@link utils}
		 * module. This callback will replace variable definitions (like 
		 * ${var_name}) with their value defined in <i>resource</i> module,
		 * or outputs tabstop with variable name otherwise.
		 * @param {AbbreviationNode} node Context node
		 * @returns {Function}
		 */
		variablesResolver: function(node) {
			var placeholderMemo = {};
			return function(str, varName) {
				// do not mark `child` variable as placeholder – it‘s a reserved
				// variable name
				if (varName == 'child') {
					return str;
				}
				
				if (varName == 'cursor') {
					return utils.getCaretPlaceholder();
				}
				
				var attr = node.attribute(varName);
				if (!_.isUndefined(attr) && attr !== str) {
					return attr;
				}
				
				var varValue = resources.getVariable(varName);
				if (varValue) {
					return varValue;
				}
				
				// output as placeholder
				if (!placeholderMemo[varName]) {
					placeholderMemo[varName] = startPlaceholderNum++;
				}
					
				return '${' + placeholderMemo[varName] + ':' + varName + '}';
			};
		},

		/**
		 * Replace variables like ${var} in string
		 * @param {String} str
		 * @param {Object} vars Variable set (defaults to variables defined in 
		 * <code>snippets.json</code>) or variable resolver (<code>Function</code>)
		 * @return {String}
		 */
		replaceVariables: function(str, vars) {
			vars = vars || {};
			var resolver = _.isFunction(vars) ? vars : function(str, p1) {
				return p1 in vars ? vars[p1] : null;
			};
			
			return this.processText(str, {
				variable: function(data) {
					var newValue = resolver(data.token, data.name, data);
					if (newValue === null) {
						// try to find variable in resources
						newValue = resources.getVariable(data.name);
					}
					
					if (newValue === null || _.isUndefined(newValue))
						// nothing found, return token itself
						newValue = data.token;
					return newValue;
				}
			});
		},
		
		/**
		 * Resets global tabstop index. When parsed tree is converted to output
		 * string (<code>AbbreviationNode.toString()</code>), all tabstops 
		 * defined in snippets and elements are upgraded in order to prevent
		 * naming conflicts of nested. For example, <code>${1}</code> of a node
		 * should not be linked with the same placehilder of the child node.
		 * By default, <code>AbbreviationNode.toString()</code> automatically
		 * upgrades tabstops of the same index for each node and writes maximum
		 * tabstop index into the <code>tabstopIndex</code> variable. To keep
		 * this variable at reasonable value, it is recommended to call 
		 * <code>resetTabstopIndex()</code> method each time you expand variable 
		 * @returns
		 */
		resetTabstopIndex: function() {
			tabstopIndex = 0;
			startPlaceholderNum = 100;
		},

		/**
		 * Output processor for abbreviation parser that will upgrade tabstops 
		 * of parsed node in order to prevent tabstop index conflicts
		 */
		abbrOutputProcessor: function(text, node, type) {
			var maxNum = 0;
			var that = this;
			
			var tsOptions = {
				tabstop: function(data) {
					var group = parseInt(data.group, 10);
					if (group === 0)
						return '${0}';
					
					if (group > maxNum) maxNum = group;
					if (data.placeholder) {
						// respect nested placeholders
						var ix = group + tabstopIndex;
						var placeholder = that.processText(data.placeholder, tsOptions);
						return '${' + ix + ':' + placeholder + '}';
					} else {
						return '${' + (group + tabstopIndex) + '}';
					}
				}
			};
			
			// upgrade tabstops
			text = this.processText(text, tsOptions);
			
			// resolve variables
			text = this.replaceVariables(text, this.variablesResolver(node));
			
			tabstopIndex += maxNum + 1;
			return text;
		}
	};
});
/**
 * Output profile module.
 * Profile defines how XHTML output data should look like
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('assets/profile',['require','exports','module','lodash','../utils/common','./resources','./preferences'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var resources = require('./resources');
	var prefs = require('./preferences');

	prefs.define('profile.allowCompactBoolean', true, 
		'This option can be used to globally disable compact form of boolean ' + 
		'attribues (attributes where name and value are equal). With compact' +
		'form enabled, HTML tags can be outputted as <code>&lt;div contenteditable&gt;</code> ' +
		'instead of <code>&lt;div contenteditable="contenteditable"&gt;</code>');

	prefs.define('profile.booleanAttributes', '^contenteditable|seamless$', 
		'A regular expression for attributes that should be boolean by default.' + 
		'If attribute name matches this expression, you don’t have to write dot ' +
		'after attribute name in Emmet abbreviation to mark it as boolean.');

	var profiles = {};
	
	var defaultProfile = {
		tag_case: 'asis',
		attr_case: 'asis',
		attr_quotes: 'double',
		
		// Each tag on new line
		tag_nl: 'decide',
		
		// With tag_nl === true, defines if leaf node (e.g. node with no children)
		// should have formatted line breaks
		tag_nl_leaf: false,
		
		place_cursor: true,
		
		// Indent tags
		indent: true,
		
		// How many inline elements should be to force line break 
		// (set to 0 to disable)
		inline_break: 3,

		// Produce compact notation of boolean attribues:
		// attributes where name and value are equal.
		// With this option enabled, HTML filter will
		// produce <div contenteditable> instead of <div contenteditable="contenteditable">
		compact_bool: false,
		
		// Use self-closing style for writing empty elements, e.g. <br /> or <br>
		self_closing_tag: 'xhtml',
		
		// Profile-level output filters, re-defines syntax filters 
		filters: '',
		
		// Additional filters applied to abbreviation.
		// Unlike "filters", this preference doesn't override default filters
		// but add the instead every time given profile is chosen
		extraFilters: ''
	};
	
	/**
	 * @constructor
	 * @type OutputProfile
	 * @param {Object} options
	 */
	function OutputProfile(options) {
		_.extend(this, defaultProfile, options);
	}
	
	OutputProfile.prototype = {
		/**
		 * Transforms tag name case depending on current profile settings
		 * @param {String} name String to transform
		 * @returns {String}
		 */
		tagName: function(name) {
			return stringCase(name, this.tag_case);
		},
		
		/**
		 * Transforms attribute name case depending on current profile settings 
		 * @param {String} name String to transform
		 * @returns {String}
		 */
		attributeName: function(name) {
			return stringCase(name, this.attr_case);
		},
		
		/**
		 * Returns quote character for current profile
		 * @returns {String}
		 */
		attributeQuote: function() {
			return this.attr_quotes == 'single' ? "'" : '"';
		},

		/**
		 * Returns self-closing tag symbol for current profile
		 * @returns {String}
		 */
		selfClosing: function() {
			if (this.self_closing_tag == 'xhtml')
				return ' /';
			
			if (this.self_closing_tag === true)
				return '/';
			
			return '';
		},
		
		/**
		 * Returns cursor token based on current profile settings
		 * @returns {String}
		 */
		cursor: function() {
			return this.place_cursor ? utils.getCaretPlaceholder() : '';
		},

		/**
		 * Check if attribute with given name is boolean,
		 * e.g. written as `contenteditable` instead of 
		 * `contenteditable="contenteditable"`
		 * @param  {String}  name Attribute name
		 * @return {Boolean}
		 */
		isBoolean: function(name, value) {
			if (name == value) {
				return true;
			}

			var boolAttrs = prefs.get('profile.booleanAttributes');
			if (!value && boolAttrs) {
				boolAttrs = new RegExp(boolAttrs, 'i');
				return boolAttrs.test(name);
			}

			return false;
		},

		/**
		 * Check if compact boolean attribute record is 
		 * allowed for current profile
		 * @return {Boolean}
		 */
		allowCompactBoolean: function() {
			return this.compact_bool && prefs.get('profile.allowCompactBoolean');
		}
	};
	
	/**
	 * Helper function that converts string case depending on 
	 * <code>caseValue</code> 
	 * @param {String} str String to transform
	 * @param {String} caseValue Case value: can be <i>lower</i>, 
	 * <i>upper</i> and <i>leave</i>
	 * @returns {String}
	 */
	function stringCase(str, caseValue) {
		switch (String(caseValue || '').toLowerCase()) {
			case 'lower':
				return str.toLowerCase();
			case 'upper':
				return str.toUpperCase();
		}
		
		return str;
	}
	
	/**
	 * Creates new output profile
	 * @param {String} name Profile name
	 * @param {Object} options Profile options
	 */
	function createProfile(name, options) {
		return profiles[name.toLowerCase()] = new OutputProfile(options);
	}
	
	function createDefaultProfiles() {
		createProfile('xhtml');
		createProfile('html', {self_closing_tag: false, compact_bool: true});
		createProfile('xml', {self_closing_tag: true, tag_nl: true});
		createProfile('plain', {tag_nl: false, indent: false, place_cursor: false});
		createProfile('line', {tag_nl: false, indent: false, extraFilters: 's'});
		createProfile('css', {tag_nl: true});
		createProfile('css_line', {tag_nl: false});
	}
	
	createDefaultProfiles();
	
	return  {
		/**
		 * Creates new output profile and adds it into internal dictionary
		 * @param {String} name Profile name
		 * @param {Object} options Profile options
		 * @memberOf emmet.profile
		 * @returns {Object} New profile
		 */
		create: function(name, options) {
			if (arguments.length == 2)
				return createProfile(name, options);
			else
				// create profile object only
				return new OutputProfile(_.defaults(name || {}, defaultProfile));
		},
		
		/**
		 * Returns profile by its name. If profile wasn't found, returns
		 * 'plain' profile
		 * @param {String} name Profile name. Might be profile itself
		 * @param {String} syntax. Optional. Current editor syntax. If defined,
		 * profile is searched in resources first, then in predefined profiles
		 * @returns {Object}
		 */
		get: function(name, syntax) {
			if (!name && syntax) {
				// search in user resources first
				var profile = resources.findItem(syntax, 'profile');
				if (profile) {
					name = profile;
				}
			}
			
			if (!name) {
				return profiles.plain;
			}
			
			if (name instanceof OutputProfile) {
				return name;
			}
			
			if (_.isString(name) && name.toLowerCase() in profiles) {
				return profiles[name.toLowerCase()];
			}
			
			return this.create(name);
		},
		
		/**
		 * Deletes profile with specified name
		 * @param {String} name Profile name
		 */
		remove: function(name) {
			name = (name || '').toLowerCase();
			if (name in profiles)
				delete profiles[name];
		},
		
		/**
		 * Resets all user-defined profiles
		 */
		reset: function() {
			profiles = {};
			createDefaultProfiles();
		},
		
		/**
		 * Helper function that converts string case depending on 
		 * <code>caseValue</code> 
		 * @param {String} str String to transform
		 * @param {String} caseValue Case value: can be <i>lower</i>, 
		 * <i>upper</i> and <i>leave</i>
		 * @returns {String}
		 */
		stringCase: stringCase
	};
});
/**
 * Module for resolving tag names: returns best matched tag name for child
 * element based on passed parent's tag name. Also provides utility function
 * for element type detection (inline, block-level, empty)
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('resolver/tagName',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');
	
	var elementTypes = {
//		empty: 'area,base,basefont,br,col,frame,hr,img,input,isindex,link,meta,param,embed,keygen,command'.split(','),
		empty: [],
		blockLevel: 'address,applet,blockquote,button,center,dd,del,dir,div,dl,dt,fieldset,form,frameset,hr,iframe,ins,isindex,li,link,map,menu,noframes,noscript,object,ol,p,pre,script,table,tbody,td,tfoot,th,thead,tr,ul,h1,h2,h3,h4,h5,h6'.split(','),
		inlineLevel: 'a,abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,code,del,dfn,em,font,i,iframe,img,input,ins,kbd,label,map,object,q,s,samp,select,small,span,strike,strong,sub,sup,textarea,tt,u,var'.split(',')
	};
	
	var elementMap = {
		'p': 'span',
		'ul': 'li',
		'ol': 'li',
		'table': 'tr',
		'tr': 'td',
		'tbody': 'tr',
		'thead': 'tr',
		'tfoot': 'tr',
		'colgroup': 'col',
		'select': 'option',
		'optgroup': 'option',
		'audio': 'source',
		'video': 'source',
		'object': 'param',
		'map': 'area'
	};
	
	return {
		/**
		 * Returns best matched child element name for passed parent's
		 * tag name
		 * @param {String} name
		 * @returns {String}
		 * @memberOf tagName
		 */
		resolve: function(name) {
			name = (name || '').toLowerCase();
			
			if (name in elementMap)
				return this.getMapping(name);
			
			if (this.isInlineLevel(name))
				return 'span';
			
			return 'div';
		},
		
		/**
		 * Returns mapped child element name for passed parent's name 
		 * @param {String} name
		 * @returns {String}
		 */
		getMapping: function(name) {
			return elementMap[name.toLowerCase()];
		},
		
		/**
		 * Check if passed element name belongs to inline-level element
		 * @param {String} name
		 * @returns {Boolean}
		 */
		isInlineLevel: function(name) {
			return this.isTypeOf(name, 'inlineLevel');
		},
		
		/**
		 * Check if passed element belongs to block-level element.
		 * For better matching of unknown elements (for XML, for example), 
		 * you should use <code>!this.isInlineLevel(name)</code>
		 * @returns {Boolean}
		 */
		isBlockLevel: function(name) {
			return this.isTypeOf(name, 'blockLevel');
		},
		
		/**
		 * Check if passed element is void (i.e. should not have closing tag).
		 * @returns {Boolean}
		 */
		isEmptyElement: function(name) {
			return this.isTypeOf(name, 'empty');
		},
		
		/**
		 * Generic function for testing if element name belongs to specified
		 * elements collection
		 * @param {String} name Element name
		 * @param {String} type Collection name
		 * @returns {Boolean}
		 */
		isTypeOf: function(name, type) {
			return _.include(elementTypes[type], name);
		},
		
		/**
		 * Adds new parent–child mapping
		 * @param {String} parent
		 * @param {String} child
		 */
		addMapping: function(parent, child) {
			elementMap[parent] = child;
		},
		
		/**
		 * Removes parent-child mapping
		 */
		removeMapping: function(parent) {
			if (parent in elementMap)
				delete elementMap[parent];
		},
		
		/**
		 * Adds new element into collection
		 * @param {String} name Element name
		 * @param {String} collection Collection name
		 */
		addElementToCollection: function(name, collection) {
			if (!elementTypes[collection])
				elementTypes[collection] = [];
			
			var col = this.getCollection(collection);
			if (!_.include(col, name))
				col.push(name);
		},
		
		/**
		 * Removes element name from specified collection
		 * @param {String} name Element name
		 * @param {String} collection Collection name
		 * @returns
		 */
		removeElementFromCollection: function(name, collection) {
			if (collection in elementTypes) {
				elementTypes[collection] = _.without(this.getCollection(collection), name);
			}
		},
		
		/**
		 * Returns elements name collection
		 * @param {String} name Collection name
		 * @returns {Array}
		 */
		getCollection: function(name) {
			return elementTypes[name];
		}
	};
});
/**
 * Utility functions to work with <code>AbbreviationNode</code> as HTML element
 * @param {Function} require
 * @param {Underscore} _
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/abbreviation',['require','exports','module','lodash','../assets/elements','../assets/tabStops','../utils/common','../resolver/tagName'],function(require, exports, module) {
	var _ = require('lodash');
	var elements = require('../assets/elements');
	var tabStops = require('../assets/tabStops');
	var utils = require('../utils/common');
	var tagName = require('../resolver/tagName');

	return {
		/**
		 * Test if passed node is unary (no closing tag)
		 * @param {AbbreviationNode} node
		 * @return {Boolean}
		 */
		isUnary: function(node) {
			if (node.children.length || node._text || this.isSnippet(node)) {
				return false;
			}
			
			var r = node.data('resource');
			return r && r.is_empty;
		},
		
		/**
		 * Test if passed node is inline-level (like &lt;strong&gt;, &lt;img&gt;)
		 * @param {AbbreviationNode} node
		 * @return {Boolean}
		 */
		isInline: function(node) {
			return node.isTextNode() 
				|| !node.name() 
				|| tagName.isInlineLevel(node.name());
		},
		
		/**
		 * Test if passed node is block-level
		 * @param {AbbreviationNode} node
		 * @return {Boolean}
		 */
		isBlock: function(node) {
			return this.isSnippet(node) || !this.isInline(node);
		},
		
		/**
		 * Test if given node is a snippet
		 * @param {AbbreviationNode} node
		 * @return {Boolean}
		 */
		isSnippet: function(node) {
			return elements.is(node.data('resource'), 'snippet');
		},
		
		/**
		 * This function tests if passed node content contains HTML tags. 
		 * This function is mostly used for output formatting
		 * @param {AbbreviationNode} node
		 * @returns {Boolean}
		 */
		hasTagsInContent: function(node) {
			return utils.matchesTag(node.content);
		},
		
		/**
		 * Test if current element contains block-level children
		 * @param {AbbreviationNode} node
		 * @return {Boolean}
		 */
		hasBlockChildren: function(node) {
			return (this.hasTagsInContent(node) && this.isBlock(node)) 
				|| _.any(node.children, function(child) {
					return this.isBlock(child);
				}, this);
		},
		
		/**
		 * Utility function that inserts content instead of <code>${child}</code>
		 * variables on <code>text</code>
		 * @param {String} text Text where child content should be inserted
		 * @param {String} childContent Content to insert
		 * @param {Object} options
		 * @returns {String
		 */
		insertChildContent: function(text, childContent, options) {
			options = _.extend({
				keepVariable: true,
				appendIfNoChild: true
			}, options || {});
			
			var childVariableReplaced = false;
			text = tabStops.replaceVariables(text, function(variable, name, data) {
				var output = variable;
				if (name == 'child') {
					// add correct indentation
					output = utils.padString(childContent, utils.getLinePaddingFromPosition(text, data.start));
					childVariableReplaced = true;
					if (options.keepVariable)
						output += variable;
				}
				
				return output;
			});
			
			if (!childVariableReplaced && options.appendIfNoChild) {
				text += childContent;
			}
			
			return text;
		}
	};
});
/**
 * Generic formatting filter: creates proper indentation for each tree node,
 * placing "%s" placeholder where the actual output should be. You can use
 * this filter to preformat tree and then replace %s placeholder to whatever you
 * need. This filter should't be called directly from editor as a part 
 * of abbreviation.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/format',['require','exports','module','lodash','../utils/common','../utils/abbreviation','../assets/preferences','../assets/resources'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var abbrUtils = require('../utils/abbreviation');
	var prefs = require('../assets/preferences');
	var resources = require('../assets/resources');

	prefs.define('format.noIndentTags', 'html', 
			'A comma-separated list of tag names that should not get inner indentation.');
	
	prefs.define('format.forceIndentationForTags', 'body', 
		'A comma-separated list of tag names that should <em>always</em> get inner indentation.');

	var placeholder = '%s';
	
	/**
	 * Get indentation for given node
	 * @param {AbbreviationNode} node
	 * @returns {String}
	 */
	function getIndentation(node) {
		if (_.include(prefs.getArray('format.noIndentTags') || [], node.name())) {
			return '';
		}
		
		return '\t';
	}
	
	/**
	 * Test if passed node has block-level sibling element
	 * @param {AbbreviationNode} item
	 * @return {Boolean}
	 */
	function hasBlockSibling(item) {
		return item.parent && abbrUtils.hasBlockChildren(item.parent);
	}
	
	/**
	 * Test if passed item is very first child in parsed tree
	 * @param {AbbreviationNode} item
	 */
	function isVeryFirstChild(item) {
		return item.parent && !item.parent.parent && !item.index();
	}
	
	/**
	 * Check if a newline should be added before element
	 * @param {AbbreviationNode} node
	 * @param {OutputProfile} profile
	 * @return {Boolean}
	 */
	function shouldAddLineBreak(node, profile) {
		if (profile.tag_nl === true || abbrUtils.isBlock(node))
			return true;
		
		if (!node.parent || !profile.inline_break)
			return false;
		
		// check if there are required amount of adjacent inline element
		return shouldFormatInline(node.parent, profile);
}
	
	/**
	 * Need to add newline because <code>item</code> has too many inline children
	 * @param {AbbreviationNode} node
	 * @param {OutputProfile} profile
	 */
	function shouldBreakChild(node, profile) {
		// we need to test only one child element, because 
		// hasBlockChildren() method will do the rest
		return node.children.length && shouldAddLineBreak(node.children[0], profile);
	}
	
	function shouldFormatInline(node, profile) {
		var nodeCount = 0;
		return !!_.find(node.children, function(child) {
			if (child.isTextNode() || !abbrUtils.isInline(child))
				nodeCount = 0;
			else if (abbrUtils.isInline(child))
				nodeCount++;
			
			if (nodeCount >= profile.inline_break)
				return true;
		});
	}
	
	function isRoot(item) {
		return !item.parent;
	}
	
	/**
	 * Processes element with matched resource of type <code>snippet</code>
	 * @param {AbbreviationNode} item
	 * @param {OutputProfile} profile
	 */
	function processSnippet(item, profile) {
		item.start = item.end = '';
		if (!isVeryFirstChild(item) && profile.tag_nl !== false && shouldAddLineBreak(item, profile)) {
			// check if we’re not inside inline element
			if (isRoot(item.parent) || !abbrUtils.isInline(item.parent)) {
				item.start = '\n' + item.start;
			}
		}
		
		return item;
	}
	
	/**
	 * Check if we should add line breaks inside inline element
	 * @param {AbbreviationNode} node
	 * @param {OutputProfile} profile
	 * @return {Boolean}
	 */
	function shouldBreakInsideInline(node, profile) {
		var hasBlockElems = _.any(node.children, function(child) {
			if (abbrUtils.isSnippet(child))
				return false;
			
			return !abbrUtils.isInline(child);
		});
		
		if (!hasBlockElems) {
			return shouldFormatInline(node, profile);
		}
		
		return true;
	}
	
	/**
	 * Processes element with <code>tag</code> type
	 * @param {AbbreviationNode} item
	 * @param {OutputProfile} profile
	 */
	function processTag(item, profile) {
		item.start = item.end = placeholder;
		var isUnary = abbrUtils.isUnary(item);
		var nl = '\n';
		var indent = getIndentation(item);
			
		// formatting output
		if (profile.tag_nl !== false) {
			var forceNl = profile.tag_nl === true && (profile.tag_nl_leaf || item.children.length);
			if (!forceNl) {
				forceNl = _.include(prefs.getArray('format.forceIndentationForTags') || [], item.name());
			}
			
			// formatting block-level elements
			if (!item.isTextNode()) {
				if (shouldAddLineBreak(item, profile)) {
					// - do not indent the very first element
					// - do not indent first child of a snippet
					if (!isVeryFirstChild(item) && (!abbrUtils.isSnippet(item.parent) || item.index()))
						item.start = nl + item.start;
						
					if (abbrUtils.hasBlockChildren(item) || shouldBreakChild(item, profile) || (forceNl && !isUnary))
						item.end = nl + item.end;
						
					if (abbrUtils.hasTagsInContent(item) || (forceNl && !item.children.length && !isUnary))
						item.start += nl + indent;
				} else if (abbrUtils.isInline(item) && hasBlockSibling(item) && !isVeryFirstChild(item)) {
					item.start = nl + item.start;
				} else if (abbrUtils.isInline(item) && shouldBreakInsideInline(item, profile)) {
					item.end = nl + item.end;
				}
				
				item.padding = indent;
			}
		}
		
		return item;
	}

	/**
	 * Processes simplified tree, making it suitable for output as HTML structure
	 * @param {AbbreviationNode} tree
	 * @param {OutputProfile} profile
	 * @param {Number} level Depth level
	 */
	return function process(tree, profile, level) {
		level = level || 0;
	
		_.each(tree.children, function(item) {
			if (abbrUtils.isSnippet(item)) {
				processSnippet(item, profile, level);
			} else {
				processTag(item, profile, level);
			}
			
			process(item, profile, level + 1);
		});
		
		return tree;
	};
});
/**
 * Filter that produces HTML tree
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/html',['require','exports','module','lodash','../utils/abbreviation','../utils/common','../assets/tabStops','./format'],function(require, exports, module) {
	var _ = require('lodash');
	var abbrUtils = require('../utils/abbreviation');
	var utils = require('../utils/common');
	var tabStops = require('../assets/tabStops');
	var formatFilter = require('./format');

	/**
	 * Creates HTML attributes string from tag according to profile settings
	 * @param {AbbreviationNode} node
	 * @param {OutputProfile} profile
	 */
	function makeAttributesString(node, profile) {
		var attrQuote = profile.attributeQuote();
		var cursor = profile.cursor();
		
		return _.map(node.attributeList(), function(a) {
			var isBoolean = profile.isBoolean(a.name, a.value);
			var attrName = profile.attributeName(a.name);
			var attrValue = isBoolean ? attrName : a.value;
			if (isBoolean && profile.allowCompactBoolean()) {
				return ' ' + attrName;
			}
			return ' ' + attrName + '=' + attrQuote + (attrValue || cursor) + attrQuote;
		}).join('');
	}
	
	/**
	 * Processes element with <code>tag</code> type
	 * @param {AbbreviationNode} item
	 * @param {OutputProfile} profile
	 */
	function processTag(item, profile) {
		if (!item.parent) { // looks like it's root element
			return item;
		}
		
		var attrs = makeAttributesString(item, profile); 
		var cursor = profile.cursor();
		var isUnary = abbrUtils.isUnary(item);
		var start = '';
		var end = '';
			
		// define opening and closing tags
		if (!item.isTextNode()) {
			var tagName = profile.tagName(item.name());
			if (isUnary) {
				start = '<' + tagName + attrs + profile.selfClosing() + '>';
				item.end = '';
			} else {
				start = '<' + tagName + attrs + '>';
				end = '</' + tagName + '>';
			}
		}
		
		var placeholder = '%s';
		// We can't just replace placeholder with new value because
		// JavaScript will treat double $ character as a single one, assuming
		// we're using RegExp literal.
		item.start = utils.replaceSubstring(item.start, start, item.start.indexOf(placeholder), placeholder);
		item.end = utils.replaceSubstring(item.end, end, item.end.indexOf(placeholder), placeholder);
		
		// should we put caret placeholder after opening tag?
		if (
				!item.children.length 
				&& !isUnary 
				&& !~item.content.indexOf(cursor)
				&& !tabStops.extract(item.content).tabstops.length
			) {
			item.start += cursor;
		}
		
		return item;
	}

	return function process(tree, profile, level) {
		level = level || 0;
		
		if (!level) {
			tree = formatFilter(tree, profile, level)
		}
		
		_.each(tree.children, function(item) {
			if (!abbrUtils.isSnippet(item)) {
				processTag(item, profile, level);
			}
			
			process(item, profile, level + 1);
		});
		
		return tree;
	};
});
/**
 * Filter for producing HAML code from abbreviation.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/haml',['require','exports','module','lodash','../utils/common','../utils/abbreviation','./format'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var abbrUtils = require('../utils/abbreviation');
	var formatFilter = require('./format');

	function transformClassName(className) {
		return utils.trim(className).replace(/\s+/g, '.');
	}

	/**
	 * Condenses all "data-" attributes into a single entry.
	 * HAML allows data attributes to be ouputted as a sub-hash
	 * of `:data` key
	 * @param  {Array} attrs
	 * @return {Array}
	 */
	function condenseDataAttrs(attrs) {
		var out = [], data = null;
		var reData = /^data-/i;
		_.each(attrs, function(attr) {
			if (reData.test(attr.name)) {
				if (!data) {
					data = [];
					out.push({
						name: 'data',
						value: data
					});
				}

				data.push(_.extend({}, attr, {name: attr.name.replace(reData, '')}));
			} else {
				out.push(attr);
			}
		});

		return out;
	}

	function stringifyAttrs(attrs, profile) {
		var attrQuote = profile.attributeQuote();
		return '{' + _.map(attrs, function(attr) {
			var value = attrQuote + attr.value + attrQuote;
			if (_.isArray(attr.value)) {
				value = stringifyAttrs(attr.value, profile);
			} else if (attr.isBoolean) {
				value = 'true';
			}

			return ':' + attr.name + ' => ' + value
		}).join(', ') + '}';
	}
	
	/**
	 * Creates HAML attributes string from tag according to profile settings
	 * @param {AbbreviationNode} tag
	 * @param {Object} profile
	 */
	function makeAttributesString(tag, profile) {
		var attrs = '';
		var otherAttrs = [];
		var attrQuote = profile.attributeQuote();
		var cursor = profile.cursor();
		
		_.each(tag.attributeList(), function(a) {
			var attrName = profile.attributeName(a.name);
			switch (attrName.toLowerCase()) {
				// use short notation for ID and CLASS attributes
				case 'id':
					attrs += '#' + (a.value || cursor);
					break;
				case 'class':
					attrs += '.' + transformClassName(a.value || cursor);
					break;
				// process other attributes
				default:
					otherAttrs.push({
						name: attrName,
						value: a.value || cursor,
						isBoolean: profile.isBoolean(a.name, a.value)
					});
			}
		});
		
		if (otherAttrs.length) {
			attrs += stringifyAttrs(condenseDataAttrs(otherAttrs), profile);
		}
		
		return attrs;
	}
	
	/**
	 * Processes element with <code>tag</code> type
	 * @param {AbbreviationNode} item
	 * @param {OutputProfile} profile
	 */
	function processTag(item, profile) {
		if (!item.parent)
			// looks like it's root element
			return item;
		
		var attrs = makeAttributesString(item, profile);
		var cursor = profile.cursor();
		var isUnary = abbrUtils.isUnary(item);
		var selfClosing = profile.self_closing_tag && isUnary ? '/' : '';
		var start= '';
			
		// define tag name
		var tagName = '%' + profile.tagName(item.name());
		if (tagName.toLowerCase() == '%div' && attrs && attrs.indexOf('{') == -1)
			// omit div tag
			tagName = '';
			
		item.end = '';
		start = tagName + attrs + selfClosing;
		if (item.content && !/^\s/.test(item.content)) {
			item.content = ' ' + item.content;
		}
		
		var placeholder = '%s';
		// We can't just replace placeholder with new value because
		// JavaScript will treat double $ character as a single one, assuming
		// we're using RegExp literal.
		item.start = utils.replaceSubstring(item.start, start, item.start.indexOf(placeholder), placeholder);
		
		if (!item.children.length && !isUnary)
			item.start += cursor;
		
		return item;
	}

	return function process(tree, profile, level) {
		level = level || 0;
		
		if (!level) {
			tree = formatFilter(tree, '_format', profile);
		}
		
		_.each(tree.children, function(item) {
			if (!abbrUtils.isSnippet(item)) {
				processTag(item, profile, level);
			}
			
			process(item, profile, level + 1);
		});
		
		return tree;
	};
});
/**
 * Filter for producing Jade code from abbreviation.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/jade',['require','exports','module','lodash','../utils/common','../utils/abbreviation','./format','../assets/tabStops','../assets/profile'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var abbrUtils = require('../utils/abbreviation');
	var formatFilter = require('./format');
	var tabStops = require('../assets/tabStops');
	var profile = require('../assets/profile');

	var reNl = /[\n\r]/;
	var reIndentedText = /^\s*\|/;
	var reSpace = /^\s/;

	function transformClassName(className) {
		return utils.trim(className).replace(/\s+/g, '.');
	}

	function stringifyAttrs(attrs, profile) {
		var attrQuote = profile.attributeQuote();
		return '(' + _.map(attrs, function(attr) {
			if (attr.isBoolean) {
				return attr.name;
			}

			return attr.name + '=' + attrQuote + attr.value + attrQuote;
		}).join(', ') + ')';
	}
	
	/**
	 * Creates HAML attributes string from tag according to profile settings
	 * @param {AbbreviationNode} tag
	 * @param {Object} profile
	 */
	function makeAttributesString(tag, profile) {
		var attrs = '';
		var otherAttrs = [];
		var attrQuote = profile.attributeQuote();
		var cursor = profile.cursor();
		
		_.each(tag.attributeList(), function(a) {
			var attrName = profile.attributeName(a.name);
			switch (attrName.toLowerCase()) {
				// use short notation for ID and CLASS attributes
				case 'id':
					attrs += '#' + (a.value || cursor);
					break;
				case 'class':
					attrs += '.' + transformClassName(a.value || cursor);
					break;
				// process other attributes
				default:
					otherAttrs.push({
						name: attrName,
						value: a.value || cursor,
						isBoolean: profile.isBoolean(a.name, a.value)
					});
			}
		});
		
		if (otherAttrs.length) {
			attrs += stringifyAttrs(otherAttrs, profile);
		}
		
		return attrs;
	}

	function processTagContent(item) {
		if (!item.content) {
			return;
		}

		var content = tabStops.replaceVariables(item.content, function(str, name) {
			if (name === 'nl' || name === 'newline') {
				return '\n';
			}
			return str;
		});

		if (reNl.test(content) && !reIndentedText.test(content)) {
			// multiline content: pad it with indentation and pipe
			var pad = '| ';
			item.content = '\n' + pad + utils.padString(content, pad);
		} else if (!reSpace.test(content)) {
			item.content = ' ' + content;
		}
	}
	
	/**
	 * Processes element with <code>tag</code> type
	 * @param {AbbreviationNode} item
	 * @param {OutputProfile} profile
	 */
	function processTag(item, profile) {
		if (!item.parent)
			// looks like it's a root (empty) element
			return item;
		
		var attrs = makeAttributesString(item, profile);
		var cursor = profile.cursor();
		var isUnary = abbrUtils.isUnary(item);
			
		// define tag name
		var tagName = profile.tagName(item.name());
		if (tagName.toLowerCase() == 'div' && attrs && attrs.charAt(0) != '(')
			// omit div tag
			tagName = '';
			
		item.end = '';
		var start = tagName + attrs;
		processTagContent(item);

		var placeholder = '%s';
		// We can't just replace placeholder with new value because
		// JavaScript will treat double $ character as a single one, assuming
		// we're using RegExp literal.
		item.start = utils.replaceSubstring(item.start, start, item.start.indexOf(placeholder), placeholder);
		
		if (!item.children.length && !isUnary)
			item.start += cursor;
		
		return item;
	}

	return function process(tree, curProfile, level) {
		level = level || 0;
		
		if (!level) {
			// always format with `xml` profile since
			// Jade requires all tags to be on separate lines
			tree = formatFilter(tree, profile.get('xml'));
		}
		
		_.each(tree.children, function(item) {
			if (!abbrUtils.isSnippet(item)) {
				processTag(item, curProfile, level);
			}
			
			process(item, curProfile, level + 1);
		});
		
		return tree;
	};
});
/**
 * Filter for producing Jade code from abbreviation.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/slim',['require','exports','module','lodash','../utils/common','../utils/abbreviation','./format','../assets/tabStops','../assets/preferences','../assets/profile'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var abbrUtils = require('../utils/abbreviation');
	var formatFilter = require('./format');
	var tabStops = require('../assets/tabStops');
	var prefs = require('../assets/preferences');
	var profile = require('../assets/profile');

	var reNl = /[\n\r]/;
	var reIndentedText = /^\s*\|/;
	var reSpace = /^\s/;

	prefs.define('slim.attributesWrapper', 'none', 
		'Defines how attributes will be wrapped:' +
		'<ul>' +
		'<li><code>none</code> – no wrapping;</li>' +
		'<li><code>round</code> — wrap attributes with round braces;</li>' +
		'<li><code>square</code> — wrap attributes with round braces;</li>' +
		'<li><code>curly</code> — wrap attributes with curly braces.</li>' +
		'</ul>');

	function transformClassName(className) {
		return utils.trim(className).replace(/\s+/g, '.');
	}

	function getAttrWrapper() {
		var start = ' ', end = '';
		switch (prefs.get('slim.attributesWrapper')) {
			case 'round':
				start = '(';
				end = ')';
				break;
			case 'square':
				start = '[';
				end = ']';
				break;
			case 'curly':
				start = '{';
				end = '}';
				break;
		}

		return {
			start: start,
			end: end
		};
	}

	function stringifyAttrs(attrs, profile) {
		var attrQuote = profile.attributeQuote();
		var attrWrap = getAttrWrapper();
		return attrWrap.start + _.map(attrs, function(attr) {
			var value = attrQuote + attr.value + attrQuote;
			if (attr.isBoolean) {
				if (!attrWrap.end) {
					value = 'true';
				} else {
					return attr.name;
				}
			}

			return attr.name + '=' + value;
		}).join(' ') + attrWrap.end;
	}
	
	/**
	 * Creates HAML attributes string from tag according to profile settings
	 * @param {AbbreviationNode} tag
	 * @param {Object} profile
	 */
	function makeAttributesString(tag, profile) {
		var attrs = '';
		var otherAttrs = [];
		var attrQuote = profile.attributeQuote();
		var cursor = profile.cursor();
		
		_.each(tag.attributeList(), function(a) {
			var attrName = profile.attributeName(a.name);
			switch (attrName.toLowerCase()) {
				// use short notation for ID and CLASS attributes
				case 'id':
					attrs += '#' + (a.value || cursor);
					break;
				case 'class':
					attrs += '.' + transformClassName(a.value || cursor);
					break;
				// process other attributes
				default:
					otherAttrs.push({
						name: attrName,
						value: a.value || cursor,
						isBoolean: profile.isBoolean(a.name, a.value)
					});
			}
		});
		
		if (otherAttrs.length) {
			attrs += stringifyAttrs(otherAttrs, profile);
		}
		
		return attrs;
	}

	function processTagContent(item) {
		if (!item.content) {
			return;
		}

		var content = tabStops.replaceVariables(item.content, function(str, name) {
			if (name === 'nl' || name === 'newline') {
				return '\n';
			}
			return str;
		});

		if (reNl.test(content) && !reIndentedText.test(content)) {
			// multiline content: pad it with indentation and pipe
			var pad = '  ';
			item.content = '\n| ' + utils.padString(content, pad);
		} else if (!reSpace.test(content)) {
			item.content = ' ' + content;
		}
	}
	
	/**
	 * Processes element with <code>tag</code> type
	 * @param {AbbreviationNode} item
	 * @param {OutputProfile} profile
	 */
	function processTag(item, profile) {
		if (!item.parent)
			// looks like it's a root (empty) element
			return item;
		
		var attrs = makeAttributesString(item, profile);
		var cursor = profile.cursor();
		var isUnary = abbrUtils.isUnary(item);
		var selfClosing = profile.self_closing_tag && isUnary ? '/' : '';
			
		// define tag name
		var tagName = profile.tagName(item.name());
		if (tagName.toLowerCase() == 'div' && attrs && '([{'.indexOf(attrs.charAt(0)) == -1)
			// omit div tag
			tagName = '';
			
		item.end = '';
		var start = tagName + attrs + selfClosing;
		processTagContent(item);

		var placeholder = '%s';
		// We can't just replace placeholder with new value because
		// JavaScript will treat double $ character as a single one, assuming
		// we're using RegExp literal.
		item.start = utils.replaceSubstring(item.start, start, item.start.indexOf(placeholder), placeholder);
		
		if (!item.children.length && !isUnary)
			item.start += cursor;
		
		return item;
	}

	return function process(tree, curProfile, level) {
		level = level || 0;
		
		if (!level) {
			// always format with `xml` profile since
			// Slim requires all tags to be on separate lines
			tree = formatFilter(tree, profile.get('xml'));
		}
		
		_.each(tree.children, function(item) {
			if (!abbrUtils.isSnippet(item)) {
				processTag(item, curProfile, level);
			}
			
			process(item, curProfile, level + 1);
		});
		
		return tree;
	};
});
/**
 * Filter for trimming "select" attributes from some tags that contains
 * child elements
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/xsl',['require','exports','module','lodash','../utils/abbreviation'],function(require, exports, module) {
	var _ = require('lodash');
	var abbrUtils = require('../utils/abbreviation');

	var tags = {
		'xsl:variable': 1,
		'xsl:with-param': 1
	};
	
	/**
	 * Removes "select" attribute from node
	 * @param {AbbreviationNode} node
	 */
	function trimAttribute(node) {
		node.start = node.start.replace(/\s+select\s*=\s*(['"]).*?\1/, '');
	}

	return function process(tree) {
		_.each(tree.children, function(item) {
			if (!abbrUtils.isSnippet(item)
					&& (item.name() || '').toLowerCase() in tags 
					&& item.children.length)
				trimAttribute(item);
			process(item);
		});
		
		return tree;
	};
});
/**
 * Filter for outputting CSS and alike
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/css',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');

	/**
	 * Test if passed item is very first child in parsed tree
	 * @param {AbbreviationNode} item
	 */
	function isVeryFirstChild(item) {
		return item.parent && !item.parent.parent && !item.index();
	}

	return function process(tree, profile, level) {
		level = level || 0;
		
		_.each(tree.children, function(item) {
			if (!isVeryFirstChild(item) && profile.tag_nl !== false) {
				item.start = '\n' + item.start;
			}
			process(item, profile, level + 1);
		});
		
		return tree;
	};
});
/**
 * Filter for aiding of writing elements with complex class names as described
 * in Yandex's BEM (Block, Element, Modifier) methodology. This filter will
 * automatically inherit block and element names from parent elements and insert
 * them into child element classes
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/bem',['require','exports','module','lodash','./html','../assets/preferences','../utils/abbreviation','../utils/common'],function(require, exports, module) {
	var _ = require('lodash');
	var htmlFilter = require('./html');
	var prefs = require('../assets/preferences');
	var abbreviationUtils = require('../utils/abbreviation');
	var utils = require('../utils/common');

	prefs.define('bem.elementSeparator', '__', 'Class name’s element separator.');
	prefs.define('bem.modifierSeparator', '_', 'Class name’s modifier separator.');
	prefs.define('bem.shortElementPrefix', '-', 
			'Symbol for describing short “block-element” notation. Class names '
			+ 'prefixed with this symbol will be treated as element name for parent‘s '
			+ 'block name. Each symbol instance traverses one level up in parsed ' 
			+ 'tree for block name lookup. Empty value will disable short notation.');
	
	var shouldRunHtmlFilter = false;
	
	function getSeparators() {
		return {
			element: prefs.get('bem.elementSeparator'),
			modifier: prefs.get('bem.modifierSeparator')
		};
	}
	
	/**
	 * @param {AbbreviationNode} item
	 */
	function bemParse(item) {
		if (abbreviationUtils.isSnippet(item))
			return item;
		
		// save BEM stuff in cache for faster lookups
		item.__bem = {
			block: '',
			element: '',
			modifier: ''
		};
		
		var classNames = normalizeClassName(item.attribute('class')).split(' ');
		
		// guess best match for block name
		var reBlockName = /^[a-z]\-/i;
		item.__bem.block = _.find(classNames, function(name) {
			return reBlockName.test(name);
		});
		
		// guessing doesn't worked, pick first class name as block name
		if (!item.__bem.block) {
			reBlockName = /^[a-z]/i;
			item.__bem.block = _.find(classNames, function(name) {
				return reBlockName.test(name);
			}) || '';
		}
		
		classNames = _.chain(classNames)
			.map(function(name) {return processClassName(name, item);})
			.flatten()
			.uniq()
			.value()
			.join(' ');
		
		if (classNames)
			item.attribute('class', classNames);
		
		return item;
	}
	
	/**
	 * @param {String} className
	 * @returns {String}
	 */
	function normalizeClassName(className) {
		className = (' ' + (className || '') + ' ').replace(/\s+/g, ' ');
		
		var shortSymbol = prefs.get('bem.shortElementPrefix');
		if (shortSymbol) {
			var re = new RegExp('\\s(' + utils.escapeForRegexp(shortSymbol) + '+)', 'g');
			className = className.replace(re, function(str, p1) {
				return ' ' + utils.repeatString(getSeparators().element, p1.length);
			});
		}
		
		return utils.trim(className);
	}
	
	/**
	 * Processes class name
	 * @param {String} name Class name item to process
	 * @param {AbbreviationNode} item Host node for provided class name
	 * @returns Processed class name. May return <code>Array</code> of
	 * class names 
	 */
	function processClassName(name, item) {
		name = transformClassName(name, item, 'element');
		name = transformClassName(name, item, 'modifier');
		
		// expand class name
		// possible values:
		// * block__element
		// * block__element_modifier
		// * block__element_modifier1_modifier2
		// * block_modifier
		var block = '', element = '', modifier = '';
		var separators = getSeparators();
		if (~name.indexOf(separators.element)) {
			var elements = name.split(separators.element);
			block = elements.shift();

			var modifiers = elements.pop().split(separators.modifier);
			elements.push(modifiers.shift());
			element = elements.join(separators.element);
			modifier = modifiers.join(separators.modifier);
		} else if (~name.indexOf(separators.modifier)) {
			var blockModifiers = name.split(separators.modifier);
			
			block = blockModifiers.shift();
			modifier = blockModifiers.join(separators.modifier);
		}
		
		if (block || element || modifier) {
			if (!block) {
				block = item.__bem.block;
			}
			
			// inherit parent bem element, if exists
//			if (item.parent && item.parent.__bem && item.parent.__bem.element)
//				element = item.parent.__bem.element + separators.element + element;
			
			// produce multiple classes
			var prefix = block;
			var result = [];
			
			if (element) {
				prefix += separators.element + element;
				result.push(prefix);
			} else {
				result.push(prefix);
			}
			
			if (modifier) {
				result.push(prefix + separators.modifier + modifier);
			}
			
			item.__bem.block = block;
			item.__bem.element = element;
			item.__bem.modifier = modifier;
			
			return result;
		}
		
		// ...otherwise, return processed or original class name
		return name;
	}
	
	/**
	 * Low-level function to transform user-typed class name into full BEM class
	 * @param {String} name Class name item to process
	 * @param {AbbreviationNode} item Host node for provided class name
	 * @param {String} entityType Type of entity to be tried to transform 
	 * ('element' or 'modifier')
	 * @returns {String} Processed class name or original one if it can't be
	 * transformed
	 */
	function transformClassName(name, item, entityType) {
		var separators = getSeparators();
		var reSep = new RegExp('^(' + separators[entityType] + ')+', 'g');
		if (reSep.test(name)) {
			var depth = 0; // parent lookup depth
			var cleanName = name.replace(reSep, function(str) {
				depth = str.length / separators[entityType].length;
				return '';
			});
			
			// find donor element
			var donor = item;
			while (donor.parent && depth--) {
				donor = donor.parent;
			}
			
			if (!donor || !donor.__bem)
				donor = item;
			
			if (donor && donor.__bem) {
				var prefix = donor.__bem.block;
				
				// decide if we should inherit element name
//				if (entityType == 'element') {
//					var curElem = cleanName.split(separators.modifier, 1)[0];
//					if (donor.__bem.element && donor.__bem.element != curElem)
//						prefix += separators.element + donor.__bem.element;
//				}
				
				if (entityType == 'modifier' &&  donor.__bem.element)
					prefix += separators.element + donor.__bem.element;
				
				return prefix + separators[entityType] + cleanName;
			}
		}
		
		return name;
	}
	
	/**
	 * Recursive function for processing tags, which extends class names 
	 * according to BEM specs: http://bem.github.com/bem-method/pages/beginning/beginning.ru.html
	 * <br><br>
	 * It does several things:<br>
	 * <ul>
	 * <li>Expands complex class name (according to BEM symbol semantics):
	 * .block__elem_modifier → .block.block__elem.block__elem_modifier
	 * </li>
	 * <li>Inherits block name on child elements: 
	 * .b-block > .__el > .__el → .b-block > .b-block__el > .b-block__el__el
	 * </li>
	 * <li>Treats first dash symbol as '__'</li>
	 * <li>Double underscore (or typographic '–') is also treated as an element 
	 * level lookup, e.g. ____el will search for element definition in parent’s 
	 * parent element:
	 * .b-block > .__el1 > .____el2 → .b-block > .b-block__el1 > .b-block__el2
	 * </li>
	 * </ul>
	 * 
	 * @param {AbbreviationNode} tree
	 * @param {Object} profile
	 */
	function process(tree, profile) {
		if (tree.name) {
			bemParse(tree, profile);
		}
		
		_.each(tree.children, function(item) {
			process(item, profile);
			if (!abbreviationUtils.isSnippet(item) && item.start) {
				shouldRunHtmlFilter = true;
			}
		});
		
		return tree;
	}

	return function(tree, profile) {
		shouldRunHtmlFilter = false;
		tree = process(tree, profile);
		// in case 'bem' filter is applied after 'html' filter: run it again
		// to update output
		if (shouldRunHtmlFilter) {
			tree = htmlFilter(tree, profile);
		}
		
		return tree;
	};
});
/**
 * Comment important tags (with 'id' and 'class' attributes)
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/comment',['require','exports','module','lodash','../assets/preferences','../utils/common','../utils/template','../utils/abbreviation','./main'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('../assets/preferences');
	var utils = require('../utils/common');
	var template = require('../utils/template');
	var abbrUtils = require('../utils/abbreviation');
	var filterCore = require('./main');
	
	prefs.define('filter.commentAfter', 
			'\n<!-- /<%= attr("id", "#") %><%= attr("class", ".") %> -->',
			'A definition of comment that should be placed <i>after</i> matched '
			+ 'element when <code>comment</code> filter is applied. This definition '
			+ 'is an ERB-style template passed to <code>_.template()</code> '
			+ 'function (see Underscore.js docs for details). In template context, '
			+ 'the following properties and functions are availabe:\n'
			+ '<ul>'
			
			+ '<li><code>attr(name, before, after)</code> – a function that outputs' 
			+ 'specified attribute value concatenated with <code>before</code> ' 
			+ 'and <code>after</code> strings. If attribute doesn\'t exists, the ' 
			+ 'empty string will be returned.</li>'
			
			+ '<li><code>node</code> – current node (instance of <code>AbbreviationNode</code>)</li>'
			
			+ '<li><code>name</code> – name of current tag</li>'
			
			+ '<li><code>padding</code> – current string padding, can be used ' 
			+ 'for formatting</li>'
			
			+'</ul>');
	
	prefs.define('filter.commentBefore', 
			'',
			'A definition of comment that should be placed <i>before</i> matched '
			+ 'element when <code>comment</code> filter is applied. '
			+ 'For more info, read description of <code>filter.commentAfter</code> '
			+ 'property');
	
	prefs.define('filter.commentTrigger', 'id, class',
			'A comma-separated list of attribute names that should exist in abbreviatoin '
			+ 'where comment should be added. If you wish to add comment for '
			+ 'every element, set this option to <code>*</code>');
	
	/**
	 * Add comments to tag
	 * @param {AbbreviationNode} node
	 */
	function addComments(node, templateBefore, templateAfter) {
		// check if comments should be added
		var trigger = prefs.get('filter.commentTrigger');
		if (trigger != '*') {
			var shouldAdd = _.find(trigger.split(','), function(name) {
				return !!node.attribute(utils.trim(name));
			});

			if (!shouldAdd) {
				return;
			}
		}
		
		var ctx = {
			node: node,
			name: node.name(),
			padding: node.parent ? node.parent.padding : '',
			attr: function(name, before, after) {
				var attr = node.attribute(name);
				if (attr) {
					return (before || '') + attr + (after || '');
				}
				
				return '';
			}
		};
		
		var nodeBefore = templateBefore ? templateBefore(ctx) : '';
		var nodeAfter = templateAfter ? templateAfter(ctx) : '';
		
		node.start = node.start.replace(/</, nodeBefore + '<');
		node.end = node.end.replace(/>/, '>' + nodeAfter);
	}
	
	function process(tree, before, after) {
		_.each(tree.children, function(item) {
			if (abbrUtils.isBlock(item)) {
				addComments(item, before, after);
			}
			
			process(item, before, after);
		});
			
		return tree;
	}

	return function(tree) {
		var templateBefore = template(prefs.get('filter.commentBefore'));
		var templateAfter = template(prefs.get('filter.commentAfter'));
		
		return process(tree, templateBefore, templateAfter);
	};
});

/**
 * Filter for escaping unsafe XML characters: <, >, &
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/escape',['require','exports','module','lodash'],function(require, exports, module) {
	var _ = require('lodash');
	var charMap = {
		'<': '&lt;',
		'>': '&gt;',
		'&': '&amp;'
	};
	
	function escapeChars(str) {
		return str.replace(/([<>&])/g, function(str, p1){
			return charMap[p1];
		});
	}
	
	return function process(tree) {
		_.each(tree.children, function(item) {
			item.start = escapeChars(item.start);
			item.end = escapeChars(item.end);
			item.content = escapeChars(item.content);
			process(item);
		});
		
		return tree;
	};
});
/**
 * Output abbreviation on a single line (i.e. no line breaks)
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/singleLine',['require','exports','module','lodash','../utils/abbreviation'],function(require, exports, module) {
	var _ = require('lodash');
	var abbrUtils = require('../utils/abbreviation');
	var rePad = /^\s+/;
	var reNl = /[\n\r]/g;

	return function process(tree) {
		_.each(tree.children, function(item) {
			if (!abbrUtils.isSnippet(item)) {
				// remove padding from item 
				item.start = item.start.replace(rePad, '');
				item.end = item.end.replace(rePad, '');
			}
			
			// remove newlines 
			item.start = item.start.replace(reNl, '');
			item.end = item.end.replace(reNl, '');
			item.content = item.content.replace(reNl, '');
			
			process(item);
		});
		
		return tree;
	};
});

/**
 * Trim filter: removes characters at the beginning of the text
 * content that indicates lists: numbers, #, *, -, etc.
 * 
 * Useful for wrapping lists with abbreviation.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/trim',['require','exports','module','lodash','../assets/preferences'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('../assets/preferences');
	prefs.define('filter.trimRegexp', 
		'[\\s|\\u00a0]*[\\d|#|\\-|\*|\\u2022]+\\.?\\s*',
		'Regular expression used to remove list markers (numbers, dashes, ' 
		+ 'bullets, etc.) in <code>t</code> (trim) filter. The trim filter '
		+ 'is useful for wrapping with abbreviation lists, pased from other ' 
		+ 'documents (for example, Word documents).');
	
	function process(tree, re) {
		_.each(tree.children, function(item) {
			if (item.content) {
				item.content = item.content.replace(re, '');
			}
			
			process(item, re);
		});
		
		return tree;
	}

	return function(tree) {
		var re = new RegExp(prefs.get('filter.trimRegexp'));
		return process(tree, re);
	};
});

/**
 * Module for handling filters
 * @param {Function} require
 * @param {Underscore} _
 * @author Sergey Chikuyonok (serge.che@gmail.com) <http://chikuyonok.ru>
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('filter/main',['require','exports','module','lodash','../utils/common','../assets/profile','../assets/resources','./html','./haml','./jade','./slim','./xsl','./css','./bem','./comment','./escape','./singleLine','./trim'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var profile = require('../assets/profile');
	var resources = require('../assets/resources');

	/** List of registered filters */
	var registeredFilters = {
		html: require('./html'),
		haml: require('./haml'),
		jade: require('./jade'),
		slim: require('./slim'),
		xsl: require('./xsl'),
		css: require('./css'),
		bem: require('./bem'),
		c: require('./comment'),
		e: require('./escape'),
		s: require('./singleLine'),
		t: require('./trim')
	};
	
	/** Filters that will be applied for unknown syntax */
	var basicFilters = 'html';
	
	function list(filters) {
		if (!filters)
			return [];
		
		if (_.isString(filters))
			return filters.split(/[\|,]/g);
		
		return filters;
	}
	
	return  {
		/**
		 * Register new filter
		 * @param {String} name Filter name
		 * @param {Function} fn Filter function
		 */
		add: function(name, fn) {
			registeredFilters[name] = fn;
		},
		
		/**
		 * Apply filters for final output tree
		 * @param {AbbreviationNode} tree Output tree
		 * @param {Array} filters List of filters to apply. Might be a 
		 * <code>String</code>
		 * @param {Object} profile Output profile, defined in <i>profile</i> 
		 * module. Filters defined it profile are not used, <code>profile</code>
		 * is passed to filter function
		 * @memberOf emmet.filters
		 * @returns {AbbreviationNode}
		 */
		apply: function(tree, filters, profileName) {
			profileName = profile.get(profileName);
			
			_.each(list(filters), function(filter) {
				var name = utils.trim(filter.toLowerCase());
				if (name && name in registeredFilters) {
					tree = registeredFilters[name](tree, profileName);
				}
			});
			
			return tree;
		},
		
		/**
		 * Composes list of filters that should be applied to a tree, based on 
		 * passed data
		 * @param {String} syntax Syntax name ('html', 'css', etc.)
		 * @param {Object} profile Output profile
		 * @param {String} additionalFilters List or pipe-separated
		 * string of additional filters to apply
		 * @returns {Array}
		 */
		composeList: function(syntax, profileName, additionalFilters) {
			profileName = profile.get(profileName);
			var filters = list(profileName.filters || resources.findItem(syntax, 'filters') || basicFilters);
			
			if (profileName.extraFilters) {
				filters = filters.concat(list(profileName.extraFilters));
			}
				
			if (additionalFilters) {
				filters = filters.concat(list(additionalFilters));
			}
				
			if (!filters || !filters.length) {
				// looks like unknown syntax, apply basic filters
				filters = list(basicFilters);
			}
				
			return filters;
		},
		
		/**
		 * Extracts filter list from abbreviation
		 * @param {String} abbr
		 * @returns {Array} Array with cleaned abbreviation and list of 
		 * extracted filters
		 */
		extract: function(abbr) {
			var filters = '';
			abbr = abbr.replace(/\|([\w\|\-]+)$/, function(str, p1){
				filters = p1;
				return '';
			});
			
			return [abbr, list(filters)];
		}
	};
});
/**
 * "Lorem ipsum" text generator. Matches <code>lipsum(num)?</code> or 
 * <code>lorem(num)?</code> abbreviation.
 * This code is based on Django's contribution: 
 * https://code.djangoproject.com/browser/django/trunk/django/contrib/webdesign/lorem_ipsum.py
 * <br><br>
 * Examples to test:<br>
 * <code>lipsum</code> – generates 30 words text.<br>
 * <code>lipsum*6</code> – generates 6 paragraphs (autowrapped with &lt;p&gt; element) of text.<br>
 * <code>ol>lipsum10*5</code> — generates ordered list with 5 list items (autowrapped with &lt;li&gt; tag)
 * with text of 10 words on each line<br>
 * <code>span*3>lipsum20</code> – generates 3 paragraphs of 20-words text, each wrapped with &lt;span&gt; element .
 * Each paragraph phrase is unique   
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('generator/lorem',['require','exports','module','lodash','../assets/preferences'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('../assets/preferences');

	var langs = {
		en: {
			common: ['lorem', 'ipsum', 'dolor', 'sit', 'amet', 'consectetur', 'adipisicing', 'elit'],
			words: ['exercitationem', 'perferendis', 'perspiciatis', 'laborum', 'eveniet',
				'sunt', 'iure', 'nam', 'nobis', 'eum', 'cum', 'officiis', 'excepturi',
				'odio', 'consectetur', 'quasi', 'aut', 'quisquam', 'vel', 'eligendi',
				'itaque', 'non', 'odit', 'tempore', 'quaerat', 'dignissimos',
				'facilis', 'neque', 'nihil', 'expedita', 'vitae', 'vero', 'ipsum',
				'nisi', 'animi', 'cumque', 'pariatur', 'velit', 'modi', 'natus',
				'iusto', 'eaque', 'sequi', 'illo', 'sed', 'ex', 'et', 'voluptatibus',
				'tempora', 'veritatis', 'ratione', 'assumenda', 'incidunt', 'nostrum',
				'placeat', 'aliquid', 'fuga', 'provident', 'praesentium', 'rem',
				'necessitatibus', 'suscipit', 'adipisci', 'quidem', 'possimus',
				'voluptas', 'debitis', 'sint', 'accusantium', 'unde', 'sapiente',
				'voluptate', 'qui', 'aspernatur', 'laudantium', 'soluta', 'amet',
				'quo', 'aliquam', 'saepe', 'culpa', 'libero', 'ipsa', 'dicta',
				'reiciendis', 'nesciunt', 'doloribus', 'autem', 'impedit', 'minima',
				'maiores', 'repudiandae', 'ipsam', 'obcaecati', 'ullam', 'enim',
				'totam', 'delectus', 'ducimus', 'quis', 'voluptates', 'dolores',
				'molestiae', 'harum', 'dolorem', 'quia', 'voluptatem', 'molestias',
				'magni', 'distinctio', 'omnis', 'illum', 'dolorum', 'voluptatum', 'ea',
				'quas', 'quam', 'corporis', 'quae', 'blanditiis', 'atque', 'deserunt',
				'laboriosam', 'earum', 'consequuntur', 'hic', 'cupiditate',
				'quibusdam', 'accusamus', 'ut', 'rerum', 'error', 'minus', 'eius',
				'ab', 'ad', 'nemo', 'fugit', 'officia', 'at', 'in', 'id', 'quos',
				'reprehenderit', 'numquam', 'iste', 'fugiat', 'sit', 'inventore',
				'beatae', 'repellendus', 'magnam', 'recusandae', 'quod', 'explicabo',
				'doloremque', 'aperiam', 'consequatur', 'asperiores', 'commodi',
				'optio', 'dolor', 'labore', 'temporibus', 'repellat', 'veniam',
				'architecto', 'est', 'esse', 'mollitia', 'nulla', 'a', 'similique',
				'eos', 'alias', 'dolore', 'tenetur', 'deleniti', 'porro', 'facere',
				'maxime', 'corrupti']
		},
		ru: {
			common: ['далеко-далеко', 'за', 'словесными', 'горами', 'в стране', 'гласных', 'и согласных', 'живут', 'рыбные', 'тексты'],
			words: ['вдали', 'от всех', 'они', 'буквенных', 'домах', 'на берегу', 'семантика', 
				'большого', 'языкового', 'океана', 'маленький', 'ручеек', 'даль', 
				'журчит', 'по всей', 'обеспечивает', 'ее','всеми', 'необходимыми', 
				'правилами', 'эта', 'парадигматическая', 'страна', 'которой', 'жаренные', 
				'предложения', 'залетают', 'прямо', 'рот', 'даже', 'всемогущая', 
				'пунктуация', 'не', 'имеет', 'власти', 'над', 'рыбными', 'текстами', 
				'ведущими', 'безорфографичный', 'образ', 'жизни', 'однажды', 'одна', 
				'маленькая', 'строчка','рыбного', 'текста', 'имени', 'lorem', 'ipsum', 
				'решила', 'выйти', 'большой', 'мир', 'грамматики', 'великий', 'оксмокс', 
				'предупреждал', 'о', 'злых', 'запятых', 'диких', 'знаках', 'вопроса', 
				'коварных', 'точках', 'запятой', 'но', 'текст', 'дал', 'сбить', 
				'себя', 'толку', 'он', 'собрал', 'семь', 'своих', 'заглавных', 'букв', 
				'подпоясал', 'инициал', 'за', 'пояс', 'пустился', 'дорогу', 
				'взобравшись', 'первую', 'вершину', 'курсивных', 'гор', 'бросил', 
				'последний', 'взгляд', 'назад', 'силуэт', 'своего', 'родного', 'города', 
				'буквоград', 'заголовок', 'деревни', 'алфавит', 'подзаголовок', 'своего', 
				'переулка', 'грустный', 'реторический', 'вопрос', 'скатился', 'его', 
				'щеке', 'продолжил', 'свой', 'путь', 'дороге', 'встретил', 'рукопись', 
				'она', 'предупредила',  'моей', 'все', 'переписывается', 'несколько', 
				'раз', 'единственное', 'что', 'меня', 'осталось', 'это', 'приставка', 
				'возвращайся', 'ты', 'лучше', 'свою', 'безопасную', 'страну', 'послушавшись', 
				'рукописи', 'наш', 'продолжил', 'свой', 'путь', 'вскоре', 'ему', 
				'повстречался', 'коварный', 'составитель', 'рекламных', 'текстов', 
				'напоивший', 'языком', 'речью', 'заманивший', 'свое', 'агенство', 
				'которое', 'использовало', 'снова', 'снова', 'своих', 'проектах', 
				'если', 'переписали', 'то', 'живет', 'там', 'до', 'сих', 'пор']
		}
	};

	
	prefs.define('lorem.defaultLang', 'en', 
		'Default language of generated dummy text. Currently, <code>en</code>\
		and <code>ru</code> are supported, but users can add their own syntaxes\
		see <a href="http://docs.emmet.io/abbreviations/lorem-ipsum/">docs</a>.');
	prefs.define('lorem.omitCommonPart', false,
		'Omit commonly used part (e.g. “Lorem ipsum dolor sit amet“) from generated text.');
	
	/**
	 * Returns random integer between <code>from</code> and <code>to</code> values
	 * @param {Number} from
	 * @param {Number} to
	 * @returns {Number}
	 */
	function randint(from, to) {
		return Math.round(Math.random() * (to - from) + from);
	}
	
	/**
	 * @param {Array} arr
	 * @param {Number} count
	 * @returns {Array}
	 */
	function sample(arr, count) {
		var len = arr.length;
		var iterations = Math.min(len, count);
		var result = [];
		while (result.length < iterations) {
			var randIx = randint(0, len - 1);
			if (!_.include(result, randIx))
				result.push(randIx);
		}
		
		return _.map(result, function(ix) {
			return arr[ix];
		});
	}
	
	function choice(val) {
		if (_.isString(val))
			return val.charAt(randint(0, val.length - 1));
		
		return val[randint(0, val.length - 1)];
	}
	
	function sentence(words, end) {
		if (words.length) {
			words[0] = words[0].charAt(0).toUpperCase() + words[0].substring(1);
		}
		
		return words.join(' ') + (end || choice('?!...')); // more dots than question marks
	}
	
	/**
	 * Insert commas at randomly selected words. This function modifies values
	 * inside <code>words</code> array 
	 * @param {Array} words
	 */
	function insertCommas(words) {
		var len = words.length;
		var totalCommas = 0;
		
		if (len > 3 && len <= 6) {
			totalCommas = randint(0, 1);
		} else if (len > 6 && len <= 12) {
			totalCommas = randint(0, 2);
		} else {
			totalCommas = randint(1, 4);
		}

		if (!totalCommas) {
			return;
		}

		_.each(_.range(totalCommas), function(ix) {
			if (words.length < 2) {
				return;
			}

			var pos = randint(0, words.length - 2);
			var word = words[pos];
			if (word.charAt(word.length - 1) !== ',') {
				words[pos] += ',';
			}
		});
	}
	
	/**
	 * Generate a paragraph of "Lorem ipsum" text
	 * @param {Number} wordCount Words count in paragraph
	 * @param {Boolean} startWithCommon Should paragraph start with common 
	 * "lorem ipsum" sentence.
	 * @returns {String}
	 */
	function paragraph(lang, wordCount, startWithCommon) {
		var data = langs[lang];
		if (!data) {
			return '';
		}

		var result = [];
		var totalWords = 0;
		var words;
		
		wordCount = parseInt(wordCount, 10);
		
		if (startWithCommon && data.common) {
			words = data.common.slice(0, wordCount);
			if (words.length > 5) {
				words[4] += ',';
			}
			totalWords += words.length;
			result.push(sentence(words, '.'));
		}
		
		while (totalWords < wordCount) {
			words = sample(data.words, Math.min(randint(2, 30), wordCount - totalWords));
			totalWords += words.length;
			insertCommas(words);
			result.push(sentence(words));
		}
		
		return result.join(' ');
	}

	return {
		/**
		 * Adds new language words for Lorem Ipsum generator
		 * @param {String} lang Two-letter lang definition
		 * @param {Object} data Words for language. Maight be either a space-separated 
		 * list of words (String), Array of words or object with <code>text</code> and
		 * <code>common</code> properties
		 */
		addLang: function(lang, data) {
			if (_.isString(data)) {
				data = {words: _.compact(data.split(' '))};
			} else if (_.isArray(data)) {
				data = {words: data};
			}

			langs[lang] = data;
		},
		preprocessor: function(tree) {
			var re = /^(?:lorem|lipsum)([a-z]{2})?(\d*)$/i, match;
			var allowCommon = !prefs.get('lorem.omitCommonPart');
			
			/** @param {AbbreviationNode} node */
			tree.findAll(function(node) {
				if (node._name && (match = node._name.match(re))) {
					var wordCound = match[2] || 30;
					var lang = match[1] || prefs.get('lorem.defaultLang') || 'en';
					
					// force node name resolving if node should be repeated
					// or contains attributes. In this case, node should be outputed
					// as tag, otherwise as text-only node
					node._name = '';
					node.data('forceNameResolving', node.isRepeating() || node.attributeList().length);
					node.data('pasteOverwrites', true);
					node.data('paste', function(i) {
						return paragraph(lang, wordCound, !i && allowCommon);
					});
				}
			});
		}
	};
});
/**
 * Pasted content abbreviation processor. A pasted content is a content that
 * should be inserted into implicitly repeated abbreviation nodes.
 * This processor powers “Wrap With Abbreviation” action
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/processor/pastedContent',['require','exports','module','lodash','../../utils/common','../../utils/abbreviation','../../assets/stringStream','../../assets/range'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../../utils/common');
	var abbrUtils = require('../../utils/abbreviation');
	var stringStream = require('../../assets/stringStream');
	var range = require('../../assets/range');

	var outputPlaceholder = '$#';
	
	/**
	 * Locates output placeholders inside text
	 * @param {String} text
	 * @returns {Array} Array of ranges of output placeholder in text
	 */
	function locateOutputPlaceholder(text) {
		var result = [];
		
		var stream = stringStream.create(text);
		
		while (!stream.eol()) {
			if (stream.peek() == '\\') {
				stream.next();
			} else {
				stream.start = stream.pos;
				if (stream.match(outputPlaceholder, true)) {
					result.push(range.create(stream.start, outputPlaceholder));
					continue;
				}
			}
			stream.next();
		}
		
		return result;
	}
	
	/**
	 * Replaces output placeholders inside <code>source</code> with 
	 * <code>value</code>
	 * @param {String} source
	 * @param {String} value
	 * @returns {String}
	 */
	function replaceOutputPlaceholders(source, value) {
		var ranges = locateOutputPlaceholder(source);
		
		ranges.reverse();
		_.each(ranges, function(r) {
			source = utils.replaceSubstring(source, value, r);
		});
		
		return source;
	}
	
	/**
	 * Check if parsed node contains output placeholder – a target where
	 * pasted content should be inserted
	 * @param {AbbreviationNode} node
	 * @returns {Boolean}
	 */
	function hasOutputPlaceholder(node) {
		if (locateOutputPlaceholder(node.content).length)
			return true;
		
		// check if attributes contains placeholder
		return !!_.find(node.attributeList(), function(attr) {
			return !!locateOutputPlaceholder(attr.value).length;
		});
	}
	
	/**
	 * Insert pasted content into correct positions of parsed node
	 * @param {AbbreviationNode} node
	 * @param {String} content
	 * @param {Boolean} overwrite Overwrite node content if no value placeholders
	 * found instead of appending to existing content
	 */
	function insertPastedContent(node, content, overwrite) {
		var nodesWithPlaceholders = node.findAll(function(item) {
			return hasOutputPlaceholder(item);
		});
		
		if (hasOutputPlaceholder(node))
			nodesWithPlaceholders.unshift(node);
		
		if (nodesWithPlaceholders.length) {
			_.each(nodesWithPlaceholders, function(item) {
				item.content = replaceOutputPlaceholders(item.content, content);
				_.each(item._attributes, function(attr) {
					attr.value = replaceOutputPlaceholders(attr.value, content);
				});
			});
		} else {
			// on output placeholders in subtree, insert content in the deepest
			// child node
			var deepest = node.deepestChild() || node;
			if (overwrite) {
				deepest.content = content;
			} else {
				deepest.content = abbrUtils.insertChildContent(deepest.content, content);
			}
		}
	}

	return {
		pastedContent: function(item) {
			var content = item.data('paste');
			if (_.isArray(content)) {
				return content[item.counter - 1];
			} else if (_.isFunction(content)) {
				return content(item.counter - 1, item.content);
			} else if (content) {
				return content;
			}
		},

		/**
		 * @param {AbbreviationNode} tree
		 * @param {Object} options
		 */
		preprocessor: function(tree, options) {
			if (options.pastedContent) {
				var lines = _.map(utils.splitByLines(options.pastedContent, true), utils.trim);
				
				// set repeat count for implicitly repeated elements before
				// tree is unrolled
				tree.findAll(function(item) {
					if (item.hasImplicitRepeat) {
						item.data('paste', lines);
						return item.repeatCount = lines.length;
					}
				});
			}
		},

		/**
		 * @param {AbbreviationNode} tree
		 * @param {Object} options
		 */
		postprocessor: function(tree, options) {
			var that = this;
			// for each node with pasted content, update text data
			var targets = tree.findAll(function(item) {
				var pastedContent = that.pastedContent(item);
				if (pastedContent) {
					insertPastedContent(item, pastedContent, !!item.data('pasteOverwrites'));
				}
				
				return !!pastedContent;
			});
			
			if (!targets.length && options.pastedContent) {
				// no implicitly repeated elements, put pasted content in
				// the deepest child
				insertPastedContent(tree, options.pastedContent);
			}
		}
	};
});
/**
 * Resolves tag names in abbreviations with implied name
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/processor/tagName',['require','exports','module','lodash','../../resolver/tagName'],function(require, exports, module) {
	var _ = require('lodash');
	var tagName = require('../../resolver/tagName');

	/**
	 * Resolves implicit node names in parsed tree
	 * @param {AbbreviationNode} tree
	 */
	function resolveNodeNames(tree) {
		_.each(tree.children, function(node) {
			if (node.hasImplicitName() || node.data('forceNameResolving')) {
				node._name = tagName.resolve(node.parent.name());
				node.data('nameResolved', true);
			}
			resolveNodeNames(node);
		});
		
		return tree;
	}

	return {
		postprocessor: resolveNodeNames
	};
});
/**
 * Processor function that matches parsed <code>AbbreviationNode</code>
 * against resources defined in <code>resource</code> module
 */ 
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/processor/resourceMatcher',['require','exports','module','lodash','../../assets/resources','../../assets/elements','../../utils/common','../../utils/abbreviation'],function(require, exports, module) {
	var _ = require('lodash');
	var resources = require('../../assets/resources');
	var elements = require('../../assets/elements');
	var utils = require('../../utils/common');
	var abbreviationUtils = require('../../utils/abbreviation');

	/**
	 * Finds matched resources for child nodes of passed <code>node</code> 
	 * element. A matched resource is a reference to <i>snippets.json</i> entry
	 * that describes output of parsed node 
	 * @param {AbbreviationNode} node
	 * @param {String} syntax
	 */
	function matchResources(node, syntax, parser) {
		// do a shallow copy because the children list can be modified during
		// resource matching
		_.each(_.clone(node.children), function(child) {
			var r = resources.getMatchedResource(child, syntax);
			if (_.isString(r)) {
				r = elements.create('snippet', r);
			}

			child.data('resource', r);
			var elemType = elements.type(r);

			if (elemType == 'snippet') {
				var content = r.data;
				var curContent = child._text || child.content;
				if (curContent) {
					content = abbreviationUtils.insertChildContent(content, curContent);
				}

				child.content = content;
			} else if (elemType == 'element') {
				child._name = r.name;
				if (_.isArray(r.attributes)) {
					child._attributes = [].concat(r.attributes, child._attributes);
				}
			} else if (elemType == 'reference') {
				// it’s a reference to another abbreviation:
				// parse it and insert instead of current child
				/** @type AbbreviationNode */
				var subtree = parser.parse(r.data, {
					syntax: syntax
				});

				// if context element should be repeated, check if we need to 
				// transfer repeated element to specific child node
				if (child.repeatCount > 1) {
					var repeatedChildren = subtree.findAll(function(node) {
						return node.hasImplicitRepeat;
					});

					if (!repeatedChildren.length) {
						repeatedChildren = subtree.children
					}
					
					_.each(repeatedChildren, function(node) {
						node.repeatCount = child.repeatCount;
						node.hasImplicitRepeat = false;
					});
				}

				// move child‘s children into the deepest child of new subtree
				var deepestChild = subtree.deepestChild();
				if (deepestChild) {
					_.each(child.children, function(c) {
						deepestChild.addChild(c);
					});
					deepestChild.content = child.content;
				}

				// copy current attributes to children
				_.each(subtree.children, function(node) {
					_.each(child.attributeList(), function(attr) {
						node.attribute(attr.name, attr.value);
					});
				});
				
				child.replace(subtree.children);
			}
			
			matchResources(child, syntax, parser);
		});
	}
	
	return {
		preprocessor: function(tree, options, parser) {
			var syntax = options.syntax || utils.defaultSyntax();
			matchResources(tree, syntax, parser);
		}
	};
});
/**
 * Resolves node attribute names: moves `default` attribute value
 * from stub to real attribute.@async
 *
 * This resolver should be applied *after* resource matcher
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/processor/attributes',['require','exports','module','lodash','../../utils/common'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../../utils/common');

	var findDefault = function(attr) {
		return attr.isDefault;
	};

	var findImplied = function(attr) {
		return attr.isImplied;
	};

	var findEmpty = function(attr) {
		return !attr.value;
	};

	function resolveDefaultAttrs(node, parser) {
		_.each(node.children, function(item) {
			var attrList = item.attributeList();
			var defaultAttrValue = item.attribute(parser.DEFAULT_ATTR_NAME);
			if (!_.isUndefined(defaultAttrValue)) {
				// remove stub attribute
				item.attribute(parser.DEFAULT_ATTR_NAME, null);
				
				if (attrList.length) {
					// target for default value:
					// 1. default attribute
					// 2. implied attribute
					// 3. first empty attribute
				
					// find attribute marked as default
					var defaultAttr = _.find(attrList, findDefault) 
						|| _.find(attrList, findImplied) 
						|| _.find(attrList, findEmpty);

					if (defaultAttr) {
						var oldVal = item.attribute(defaultAttr.name);
						var newVal = utils.replaceUnescapedSymbol(oldVal, '|', defaultAttrValue);
						// no replacement, e.g. default value does not contains | symbol
						if (oldVal == newVal) {
							newVal = defaultAttrValue
						}
						
						item.attribute(defaultAttr.name, newVal);
					}
				}
			} else {
				// if no default attribute value, remove implied attributes
				_.each(attrList, function(attr) {
					if (attr.isImplied) {
						item.attribute(attr.name, null);
					}
				});
			}

			resolveDefaultAttrs(item, parser);
		});
	}

	return {
		/**
		 * @param  {AbbreviationNode} tree
		 * @param  {Object} options
		 * @param  {abbreviation} parser
		 */
		preprocessor: function(tree, options, parser) {
			resolveDefaultAttrs(tree, parser);
		}
	};
});
/**
 * A preptocessor for &lt;a&gt; tag: tests wrapped content
 * for common URL patterns and, if matched, inserts it as 
 * `href` attribute
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/processor/href',['require','exports','module','../../assets/preferences','../../utils/common','./pastedContent'],function(require, exports, module) {
	var prefs = require('../../assets/preferences');
	var utils = require('../../utils/common');
	var pc = require('./pastedContent');

	prefs.define('href.autodetect', true, 
		'Enables or disables automatic URL recognition when wrapping\
		text with <code>&lt;a&gt;</code> tag. With this option enabled,\
		if wrapped text matches URL or e-mail pattern it will be automatically\
		inserted into <code>href</code> attribute.');
	prefs.define('href.urlPattern', '^(?:(?:https?|ftp|file)://|www\\.|ftp\\.)(?:\\([-A-Z0-9+&@#/%=~_|$?!:,.]*\\)|[-A-Z0-9+&@#/%=~_|$?!:,.])*(?:\\([-A-Z0-9+&@#/%=~_|$?!:,.]*\\)|[A-Z0-9+&@#/%=~_|$])', 
		'RegExp pattern to match wrapped URLs. Matched content will be inserts\
		as-is into <code>href</code> attribute, only whitespace will be trimmed.');

	prefs.define('href.emailPattern', '^[a-z0-9._%+-]+@[a-z0-9.-]+\\.[a-z]{2,5}$', 
		'RegExp pattern to match wrapped e-mails. Unlike <code>href.urlPattern</code>,\
		wrapped content will be prefixed with <code>mailto:</code> in <code>href</code>\
		attribute');

	return {
		/**
		 * @param {AbbreviationNode} tree
		 * @param {Object} options
		 */
		postprocessor: function(tree, options) {
			if (!prefs.get('href.autodetect')) {
				return;
			}

			var reUrl = new RegExp(prefs.get('href.urlPattern'), 'i');
			var reEmail = new RegExp(prefs.get('href.emailPattern'), 'i');
			var reProto = /^([a-z]+:)?\/\//i;

			tree.findAll(function(item) {
				if (item.name().toLowerCase() != 'a' || item.attribute('href')) {
					return;
				}

				var pastedContent = utils.trim(pc.pastedContent(item) || options.pastedContent);
				if (pastedContent) {
					if (reUrl.test(pastedContent)) {
						// do we have protocol?
						if (!reProto.test(pastedContent)) {
							pastedContent = 'http://' + pastedContent;
						}

						item.attribute('href', pastedContent);
					} else if (reEmail.test(pastedContent)) {
						item.attribute('href', 'mailto:' + pastedContent);
					}
				}
			});
		}
	};
});
/**
 * Emmet abbreviation parser.
 * Takes string abbreviation and recursively parses it into a tree. The parsed 
 * tree can be transformed into a string representation with 
 * <code>toString()</code> method. Note that string representation is defined
 * by custom processors (called <i>filters</i>), not by abbreviation parser 
 * itself.
 * 
 * This module can be extended with custom pre-/post-processors to shape-up
 * final tree or its representation. Actually, many features of abbreviation 
 * engine are defined in other modules as tree processors
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('parser/abbreviation',['require','exports','module','lodash','../assets/tabStops','../assets/profile','../filter/main','../utils/common','../utils/abbreviation','../assets/stringStream','../generator/lorem','./processor/pastedContent','./processor/tagName','./processor/resourceMatcher','./processor/attributes','./processor/href'],function(require, exports, module) {
	var _ = require('lodash');
	var tabStops = require('../assets/tabStops');
	var profile = require('../assets/profile');
	var filters = require('../filter/main');
	var utils = require('../utils/common');
	var abbreviationUtils = require('../utils/abbreviation');
	var stringStream = require('../assets/stringStream');

	// pre- and post-processorcs
	var lorem = require('../generator/lorem');
	var procPastedContent = require('./processor/pastedContent');
	var procTagName = require('./processor/tagName');
	var procResourceMatcher = require('./processor/resourceMatcher');
	var procAttributes = require('./processor/attributes');
	var procHref = require('./processor/href');

	var reValidName = /^[\w\-\$\:@\!%]+\+?$/i;
	var reWord = /[\w\-:\$@]/;
	var DEFAULT_ATTR_NAME = '%default';
	
	var pairs = {
		'[': ']',
		'(': ')',
		'{': '}'
	};
	
	var spliceFn = Array.prototype.splice;
	
	var preprocessors = [];
	var postprocessors = [];
	var outputProcessors = [];
	
	/**
	 * @type AbbreviationNode
	 */
	function AbbreviationNode(parent) {
		/** @type AbbreviationNode */
		this.parent = null;
		this.children = [];
		this._attributes = [];
		
		/** @type String Raw abbreviation for current node */
		this.abbreviation = '';
		this.counter = 1;
		this._name = null;
		this._text = '';
		this.repeatCount = 1;
		this.hasImplicitRepeat = false;
		
		/** Custom data dictionary */
		this._data = {};
		
		// output properties
		this.start = '';
		this.end = '';
		this.content = '';
		this.padding = '';
	}
	
	AbbreviationNode.prototype = {
		/**
		 * Adds passed node as child or creates new child
		 * @param {AbbreviationNode} child
		 * @param {Number} position Index in children array where child should 
		 * be inserted
		 * @return {AbbreviationNode}
		 */
		addChild: function(child, position) {
			child = child || new AbbreviationNode();
			child.parent = this;
			
			if (_.isUndefined(position)) {
				this.children.push(child);
			} else {
				this.children.splice(position, 0, child);
			}
			
			return child;
		},
		
		/**
		 * Creates a deep copy of current node
		 * @returns {AbbreviationNode}
		 */
		clone: function() {
			var node = new AbbreviationNode();
			var attrs = ['abbreviation', 'counter', '_name', '_text', 'repeatCount', 'hasImplicitRepeat', 'start', 'end', 'content', 'padding'];
			_.each(attrs, function(a) {
				node[a] = this[a];
			}, this);
			
			// clone attributes
			node._attributes = _.map(this._attributes, function(attr) {
				return _.clone(attr);
			});
			
			node._data = _.clone(this._data);
			
			// clone children
			node.children = _.map(this.children, function(child) {
				child = child.clone();
				child.parent = node;
				return child;
			});
			
			return node;
		},
		
		/**
		 * Removes current node from parent‘s child list
		 * @returns {AbbreviationNode} Current node itself
		 */
		remove: function() {
			if (this.parent) {
				this.parent.children = _.without(this.parent.children, this);
			}
			
			return this;
		},
		
		/**
		 * Replaces current node in parent‘s children list with passed nodes
		 * @param {AbbreviationNode} node Replacement node or array of nodes
		 */
		replace: function() {
			var parent = this.parent;
			var ix = _.indexOf(parent.children, this);
			var items = _.flatten(arguments);
			spliceFn.apply(parent.children, [ix, 1].concat(items));
			
			// update parent
			_.each(items, function(item) {
				item.parent = parent;
			});
		},
		
		/**
		 * Recursively sets <code>property</code> to <code>value</code> of current
		 * node and its children 
		 * @param {String} name Property to update
		 * @param {Object} value New property value
		 */
		updateProperty: function(name, value) {
			this[name] = value;
			_.each(this.children, function(child) {
				child.updateProperty(name, value);
			});
			
			return this;
		},
		
		/**
		 * Finds first child node that matches truth test for passed 
		 * <code>fn</code> function
		 * @param {Function} fn
		 * @returns {AbbreviationNode}
		 */
		find: function(fn) {
			return this.findAll(fn, {amount: 1})[0];
		},
		
		/**
		 * Finds all child nodes that matches truth test for passed 
		 * <code>fn</code> function
		 * @param {Function} fn
		 * @returns {Array}
		 */
		findAll: function(fn, state) {
			state = _.extend({amount: 0, found: 0}, state || {});

			if (!_.isFunction(fn)) {
				var elemName = fn.toLowerCase();
				fn = function(item) {return item.name().toLowerCase() == elemName;};
			}
				
			var result = [];
			_.each(this.children, function(child) {
				if (fn(child)) {
					result.push(child);
					state.found++;
					if (state.amount && state.found >= state.amount) {
						return;
					}
				}
				
				result = result.concat(child.findAll(fn));
			});
			
			return _.compact(result);
		},
		
		/**
		 * Sets/gets custom data
		 * @param {String} name
		 * @param {Object} value
		 * @returns {Object}
		 */
		data: function(name, value) {
			if (arguments.length == 2) {
				this._data[name] = value;
			}
			
			return this._data[name];
		},
		
		/**
		 * Returns name of current node
		 * @returns {String}
		 */
		name: function() {
			return this._name;
		},
		
		/**
		 * Returns list of attributes for current node
		 * @returns {Array}
		 */
		attributeList: function() {
			return optimizeAttributes(this._attributes.slice(0));
		},
		
		/**
		 * Returns or sets attribute value
		 * @param {String} name Attribute name
		 * @param {String} value New attribute value. `Null` value 
		 * will remove attribute
		 * @returns {String}
		 */
		attribute: function(name, value) {
			if (arguments.length == 2) {
				if (value === null) {
					// remove attribute
					var vals = _.filter(this._attributes, function(attr) {
						return attr.name === name;
					});

					var that = this;
					_.each(vals, function(attr) {
						that._attributes = _.without(that._attributes, attr);
					});

					return;
				}

				// modify attribute
				var ix = _.indexOf(_.pluck(this._attributes, 'name'), name.toLowerCase());
				if (~ix) {
					this._attributes[ix].value = value;
				} else {
					this._attributes.push({
						name: name,
						value: value
					});
				}
			}
			
			return (_.find(this.attributeList(), function(attr) {
				return attr.name == name;
			}) || {}).value;
		},
		
		/**
		 * Returns index of current node in parent‘s children list
		 * @returns {Number}
		 */
		index: function() {
			return this.parent ? _.indexOf(this.parent.children, this) : -1;
		},
		
		/**
		 * Sets how many times current element should be repeated
		 * @private
		 */
		_setRepeat: function(count) {
			if (count) {
				this.repeatCount = parseInt(count, 10) || 1;
			} else {
				this.hasImplicitRepeat = true;
			}
		},
		
		/**
		 * Sets abbreviation that belongs to current node
		 * @param {String} abbr
		 */
		setAbbreviation: function(abbr) {
			abbr = abbr || '';
			
			var that = this;
			
			// find multiplier
			abbr = abbr.replace(/\*(\d+)?$/, function(str, repeatCount) {
				that._setRepeat(repeatCount);
				return '';
			});
			
			this.abbreviation = abbr;
			
			var abbrText = extractText(abbr);
			if (abbrText) {
				abbr = abbrText.element;
				this.content = this._text = abbrText.text;
			}
			
			var abbrAttrs = parseAttributes(abbr);
			if (abbrAttrs) {
				abbr = abbrAttrs.element;
				this._attributes = abbrAttrs.attributes;
			}
			
			this._name = abbr;
			
			// validate name
			if (this._name && !reValidName.test(this._name)) {
				throw new Error('Invalid abbreviation');
			}
		},
		
		/**
		 * Returns string representation of current node
		 * @return {String}
		 */
		valueOf: function() {
			var start = this.start;
			var end = this.end;
			var content = this.content;
			
			// apply output processors
			var node = this;
			_.each(outputProcessors, function(fn) {
				start = fn(start, node, 'start');
				content = fn(content, node, 'content');
				end = fn(end, node, 'end');
			});
			
			
			var innerContent = _.map(this.children, function(child) {
				return child.valueOf();
			}).join('');
			
			content = abbreviationUtils.insertChildContent(content, innerContent, {
				keepVariable: false
			});
			
			return start + utils.padString(content, this.padding) + end;
		},

		toString: function() {
			return this.valueOf();
		},
		
		/**
		 * Check if current node contains children with empty <code>expr</code>
		 * property
		 * @return {Boolean}
		 */
		hasEmptyChildren: function() {
			return !!_.find(this.children, function(child) {
				return child.isEmpty();
			});
		},
		
		/**
		 * Check if current node has implied name that should be resolved
		 * @returns {Boolean}
		 */
		hasImplicitName: function() {
			return !this._name && !this.isTextNode();
		},
		
		/**
		 * Indicates that current element is a grouping one, e.g. has no 
		 * representation but serves as a container for other nodes
		 * @returns {Boolean}
		 */
		isGroup: function() {
			return !this.abbreviation;
		},
		
		/**
		 * Indicates empty node (i.e. without abbreviation). It may be a 
		 * grouping node and should not be outputted
		 * @return {Boolean}
		 */
		isEmpty: function() {
			return !this.abbreviation && !this.children.length;
		},
		
		/**
		 * Indicates that current node should be repeated
		 * @returns {Boolean}
		 */
		isRepeating: function() {
			return this.repeatCount > 1 || this.hasImplicitRepeat;
		},
		
		/**
		 * Check if current node is a text-only node
		 * @return {Boolean}
		 */
		isTextNode: function() {
			return !this.name() && !this.attributeList().length;
		},
		
		/**
		 * Indicates whether this node may be used to build elements or snippets
		 * @returns {Boolean}
		 */
		isElement: function() {
			return !this.isEmpty() && !this.isTextNode();
		},
		
		/**
		 * Returns latest and deepest child of current tree
		 * @returns {AbbreviationNode}
		 */
		deepestChild: function() {
			if (!this.children.length)
				return null;
				
			var deepestChild = this;
			while (deepestChild.children.length) {
				deepestChild = _.last(deepestChild.children);
			}
			
			return deepestChild;
		}
	};
	
	/**
	 * Returns stripped string: a string without first and last character.
	 * Used for “unquoting” strings
	 * @param {String} str
	 * @returns {String}
	 */
	function stripped(str) {
		return str.substring(1, str.length - 1);
	}
	
	function consumeQuotedValue(stream, quote) {
		var ch;
		while ((ch = stream.next())) {
			if (ch === quote)
				return true;
			
			if (ch == '\\')
				continue;
		}
		
		return false;
	}
	
	/**
	 * Parses abbreviation into a tree
	 * @param {String} abbr
	 * @returns {AbbreviationNode}
	 */
	function parseAbbreviation(abbr) {
		abbr = utils.trim(abbr);
		
		var root = new AbbreviationNode();
		var context = root.addChild(), ch;
		
		/** @type StringStream */
		var stream = stringStream.create(abbr);
		var loopProtector = 1000, multiplier;
		var addChild = function(child) {
			context.addChild(child);
		};

		var consumeAbbr = function() {
			stream.start = stream.pos;
			stream.eatWhile(function(c) {
				if (c == '[' || c == '{') {
					if (stream.skipToPair(c, pairs[c])) {
						stream.backUp(1);
						return true;
					}
					
					throw 'Invalid abbreviation: mo matching "' + pairs[c] + '" found for character at ' + stream.pos;
				}
				
				if (c == '+') {
					// let's see if this is an expando marker
					stream.next();
					var isMarker = stream.eol() ||  ~'+>^*'.indexOf(stream.peek());
					stream.backUp(1);
					return isMarker;
				}
				
				return c != '(' && isAllowedChar(c);
			});
		};
		
		while (!stream.eol() && --loopProtector > 0) {
			ch = stream.peek();
			
			switch (ch) {
				case '(': // abbreviation group
					stream.start = stream.pos;
					if (stream.skipToPair('(', ')')) {
						var inner = parseAbbreviation(stripped(stream.current()));
						if ((multiplier = stream.match(/^\*(\d+)?/, true))) {
							context._setRepeat(multiplier[1]);
						}
						
						_.each(inner.children, addChild);
					} else {
						throw 'Invalid abbreviation: mo matching ")" found for character at ' + stream.pos;
					}
					break;
					
				case '>': // child operator
					context = context.addChild();
					stream.next();
					break;
					
				case '+': // sibling operator
					context = context.parent.addChild();
					stream.next();
					break;
					
				case '^': // climb up operator
					var parent = context.parent || context;
					context = (parent.parent || parent).addChild();
					stream.next();
					break;
					
				default: // consume abbreviation
					consumeAbbr();
					context.setAbbreviation(stream.current());
					stream.start = stream.pos;
			}
		}
		
		if (loopProtector < 1)
			throw 'Endless loop detected';
		
		return root;
	}

	/**
	 * Splits attribute set into a list of attributes string
	 * @param  {String} attrSet 
	 * @return {Array}
	 */
	function splitAttributes(attrSet) {
		attrSet = utils.trim(attrSet);
		var parts = [];

		// split attribute set by spaces
		var stream = stringStream(attrSet), ch;
		while ((ch = stream.next())) {
			if (ch == ' ') {
				parts.push(utils.trim(stream.current()));
				// skip spaces
				while (stream.peek() == ' ') {
					stream.next();
				}

				stream.start = stream.pos;
			} else if (ch == '"' || ch == "'") {
				// skip values in strings
				if (!stream.skipString(ch)) {
					throw new Error('Invalid attribute set');
				}
			}
		}

		parts.push(utils.trim(stream.current()));
		return parts;
	}

	/**
	 * Removes opening and closing quotes from given string
	 * @param  {String} str
	 * @return {String}
	 */
	function unquote(str) {
		var ch = str.charAt(0);
		if (ch == '"' || ch == "'") {
			str = str.substr(1);
			var last = str.charAt(str.length - 1);
			if (last === ch) {
				str = str.substr(0, str.length - 1);
			}
		}

		return str;
	}

	/**
	 * Extract attributes and their values from attribute set: 
	 * <code>[attr col=3 title="Quoted string"]</code> (without square braces)
	 * @param {String} attrSet
	 * @returns {Array}
	 */
	function extractAttributes(attrSet) {
		var reAttrName = /^[\w\-:\$@]+\.?$/;
		return _.map(splitAttributes(attrSet), function(attr) {
			// attribute name: [attr]
			if (reAttrName.test(attr)) {
				var value = '';
				if (attr.charAt(attr.length - 1) == '.') {
					// a boolean attribute
					attr = attr.substr(0, attr.length - 1);
					value = attr;
				}
				return {
					name: attr,
					value: value
				};
			}

			// attribute with value: [name=val], [name="val"]
			if (~attr.indexOf('=')) {
				var parts = attr.split('=');
				return {
					name: parts.shift(),
					value: unquote(parts.join('='))
				};
			}

			// looks like it’s implied attribute
			return {
				name: DEFAULT_ATTR_NAME,
				value: unquote(attr)
			};
		});
	}
	
	/**
	 * Parses tag attributes extracted from abbreviation. If attributes found, 
	 * returns object with <code>element</code> and <code>attributes</code>
	 * properties
	 * @param {String} abbr
	 * @returns {Object} Returns <code>null</code> if no attributes found in 
	 * abbreviation
	 */
	function parseAttributes(abbr) {
		/*
		 * Example of incoming data:
		 * #header
		 * .some.data
		 * .some.data#header
		 * [attr]
		 * #item[attr=Hello other="World"].class
		 */
		var result = [];
		var attrMap = {'#': 'id', '.': 'class'};
		var nameEnd = null;
		
		/** @type StringStream */
		var stream = stringStream.create(abbr);
		while (!stream.eol()) {
			switch (stream.peek()) {
				case '#': // id
				case '.': // class
					if (nameEnd === null)
						nameEnd = stream.pos;
					
					var attrName = attrMap[stream.peek()];
					
					stream.next();
					stream.start = stream.pos;
					stream.eatWhile(reWord);
					result.push({
						name: attrName, 
						value: stream.current()
					});
					break;
				case '[': //begin attribute set
					if (nameEnd === null)
						nameEnd = stream.pos;
					
					stream.start = stream.pos;
					if (!stream.skipToPair('[', ']')) {
						throw 'Invalid attribute set definition';
					}
					
					result = result.concat(
						extractAttributes(stripped(stream.current()))
					);
					break;
				default:
					stream.next();
			}
		}
		
		if (!result.length)
			return null;
		
		return {
			element: abbr.substring(0, nameEnd),
			attributes: optimizeAttributes(result)
		};
	}
	
	/**
	 * Optimize attribute set: remove duplicates and merge class attributes
	 * @param attrs
	 */
	function optimizeAttributes(attrs) {
		// clone all attributes to make sure that original objects are 
		// not modified
		attrs  = _.map(attrs, function(attr) {
			return _.clone(attr);
		});
		
		var lookup = {};

		return _.filter(attrs, function(attr) {
			if (!(attr.name in lookup)) {
				return lookup[attr.name] = attr;
			}
			
			var la = lookup[attr.name];
			
			if (attr.name.toLowerCase() == 'class') {
				la.value += (la.value.length ? ' ' : '') + attr.value;
			} else {
				la.value = attr.value;
			}
			
			return false;
		});
	}
	
	/**
	 * Extract text data from abbreviation: if <code>a{hello}</code> abbreviation
	 * is passed, returns object <code>{element: 'a', text: 'hello'}</code>.
	 * If nothing found, returns <code>null</code>
	 * @param {String} abbr
	 * 
	 */
	function extractText(abbr) {
		if (!~abbr.indexOf('{'))
			return null;
		
		/** @type StringStream */
		var stream = stringStream.create(abbr);
		while (!stream.eol()) {
			switch (stream.peek()) {
				case '[':
				case '(':
					stream.skipToPair(stream.peek(), pairs[stream.peek()]); break;
					
				case '{':
					stream.start = stream.pos;
					stream.skipToPair('{', '}');
					return {
						element: abbr.substring(0, stream.start),
						text: stripped(stream.current())
					};
					
				default:
					stream.next();
			}
		}
	}
	
	/**
	 * “Un-rolls“ contents of current node: recursively replaces all repeating 
	 * children with their repeated clones
	 * @param {AbbreviationNode} node
	 * @returns {AbbreviationNode}
	 */
	function unroll(node) {
		for (var i = node.children.length - 1, j, child, maxCount; i >= 0; i--) {
			child = node.children[i];
			
			if (child.isRepeating()) {
				maxCount = j = child.repeatCount;
				child.repeatCount = 1;
				child.updateProperty('counter', 1);
				child.updateProperty('maxCount', maxCount);
				while (--j > 0) {
					child.parent.addChild(child.clone(), i + 1)
						.updateProperty('counter', j + 1)
						.updateProperty('maxCount', maxCount);
				}
			}
		}
		
		// to keep proper 'counter' property, we need to walk
		// on children once again
		_.each(node.children, unroll);
		
		return node;
	}
	
	/**
	 * Optimizes tree node: replaces empty nodes with their children
	 * @param {AbbreviationNode} node
	 * @return {AbbreviationNode}
	 */
	function squash(node) {
		for (var i = node.children.length - 1; i >= 0; i--) {
			/** @type AbbreviationNode */
			var n = node.children[i];
			if (n.isGroup()) {
				n.replace(squash(n).children);
			} else if (n.isEmpty()) {
				n.remove();
			}
		}
		
		_.each(node.children, squash);
		
		return node;
	}
	
	function isAllowedChar(ch) {
		var charCode = ch.charCodeAt(0);
		var specialChars = '#.*:$-_!@|%';
		
		return (charCode > 64 && charCode < 91)       // uppercase letter
				|| (charCode > 96 && charCode < 123)  // lowercase letter
				|| (charCode > 47 && charCode < 58)   // number
				|| specialChars.indexOf(ch) != -1;    // special character
	}

	// XXX add counter replacer function as output processor
	outputProcessors.push(function(text, node) {
		return utils.replaceCounter(text, node.counter, node.maxCount);
	});

	// XXX add tabstop updater
	outputProcessors.push(_.bind(tabStops.abbrOutputProcessor, tabStops));

	// include default pre- and postprocessors
	_.each([lorem, procResourceMatcher, procAttributes, procPastedContent, procTagName, procHref], function(mod) {
		if (mod.preprocessor) {
			preprocessors.push(_.bind(mod.preprocessor, mod));
		}

		if (mod.postprocessor) {
			postprocessors.push(_.bind(mod.postprocessor, mod));
		}
	});

	return {
		DEFAULT_ATTR_NAME: DEFAULT_ATTR_NAME,

		/**
		 * Parses abbreviation into tree with respect of groups, 
		 * text nodes and attributes. Each node of the tree is a single 
		 * abbreviation. Tree represents actual structure of the outputted 
		 * result
		 * @memberOf abbreviationParser
		 * @param {String} abbr Abbreviation to parse
		 * @param {Object} options Additional options for parser and processors
		 * 
		 * @return {AbbreviationNode}
		 */
		parse: function(abbr, options) {
			options = options || {};
			
			var tree = parseAbbreviation(abbr);
			var that = this;
			
			if (options.contextNode) {
				// add info about context node –
				// a parent XHTML node in editor inside which abbreviation is 
				// expanded
				tree._name = options.contextNode.name;
				var attrLookup = {};
				_.each(tree._attributes, function(attr) {
					attrLookup[attr.name] = attr;
				});
				
				_.each(options.contextNode.attributes, function(attr) {
					if (attr.name in attrLookup) {
						attrLookup[attr.name].value = attr.value;
					} else {
						attr = _.clone(attr);
						tree._attributes.push(attr);
						attrLookup[attr.name] = attr;
					}
				});
			}
			
			// apply preprocessors
			_.each(preprocessors, function(fn) {
				fn(tree, options, that);
			});

			if ('counter' in options) {
				tree.updateProperty('counter', options.counter);
			}
			
			tree = squash(unroll(tree));
			
			// apply postprocessors
			_.each(postprocessors, function(fn) {
				fn(tree, options, that);
			});
			
			return tree;
		},

		/**
		 * Expands given abbreviation into a formatted code structure.
		 * This is the main method that is used for expanding abbreviation
		 * @param {String} abbr Abbreviation to expand
		 * @param {Options} options Additional options for abbreviation
		 * expanding and transformation: `syntax`, `profile`, `contextNode` etc.
		 * @return {String}
		 */
		expand: function(abbr, options) {
			if (!abbr) return '';
			if (typeof options == 'string') {
				throw new Error('Deprecated use of `expand` method: `options` must be object');
			}

			options = options || {};

			if (!options.syntax) {
				options.syntax = utils.defaultSyntax();
			}

			var p = profile.get(options.profile, options.syntax);
			tabStops.resetTabstopIndex();
			
			var data = filters.extract(abbr);
			var outputTree = this.parse(data[0], options);

			var filtersList = filters.composeList(options.syntax, p, data[1]);
			filters.apply(outputTree, filtersList, p);

			return outputTree.valueOf();
		},
		
		AbbreviationNode: AbbreviationNode,
		
		/**
		 * Add new abbreviation preprocessor. <i>Preprocessor</i> is a function
		 * that applies to a parsed abbreviation tree right after it get parsed.
		 * The passed tree is in unoptimized state.
		 * @param {Function} fn Preprocessor function. This function receives
		 * two arguments: parsed abbreviation tree (<code>AbbreviationNode</code>)
		 * and <code>options</code> hash that was passed to <code>parse</code>
		 * method
		 */
		addPreprocessor: function(fn) {
			if (!_.include(preprocessors, fn)) {
				preprocessors.push(fn);
			}
		},
		
		/**
		 * Removes registered preprocessor
		 */
		removeFilter: function(fn) {
			_.without(preprocessors, fn);
		},
		
		/**
		 * Adds new abbreviation postprocessor. <i>Postprocessor</i> is a 
		 * functinon that applies to <i>optimized</i> parsed abbreviation tree
		 * right before it returns from <code>parse()</code> method
		 * @param {Function} fn Postprocessor function. This function receives
		 * two arguments: parsed abbreviation tree (<code>AbbreviationNode</code>)
		 * and <code>options</code> hash that was passed to <code>parse</code>
		 * method
		 */
		addPostprocessor: function(fn) {
			if (!_.include(postprocessors, fn)) {
				postprocessors.push(fn);
			}
		},
		
		/**
		 * Removes registered postprocessor function
		 */
		removePostprocessor: function(fn) {
			postprocessors = _.without(postprocessors, fn);
		},
		
		/**
		 * Registers output postprocessor. <i>Output processor</i> is a 
		 * function that applies to output part (<code>start</code>, 
		 * <code>end</code> and <code>content</code>) when 
		 * <code>AbbreviationNode.toString()</code> method is called
		 */
		addOutputProcessor: function(fn) {
			if (!_.include(outputProcessors, fn)) {
				outputProcessors.push(fn);
			}
		},
		
		/**
		 * Removes registered output processor
		 */
		removeOutputProcessor: function(fn) {
			outputProcessors = _.without(outputProcessors, fn);
		},
		
		/**
		 * Check if passed symbol is valid symbol for abbreviation expression
		 * @param {String} ch
		 * @return {Boolean}
		 */
		isAllowedChar: function(ch) {
			ch = String(ch); // convert Java object to JS
			return isAllowedChar(ch) || ~'>+^[](){}'.indexOf(ch);
		}
	};
});
/**
 * Utility methods for Emmet actions
 * @author Sergey Chikuyonok (serge.che@gmail.com) <http://chikuyonok.ru>
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/action',['require','exports','module','lodash','./common','./cssSections','../parser/abbreviation','../assets/htmlMatcher','../editTree/xml','../assets/range','../assets/resources'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('./common');
	var cssSections = require('./cssSections');
	var abbreviationParser = require('../parser/abbreviation');
	var htmlMatcher = require('../assets/htmlMatcher');
	var xmlEditTree = require('../editTree/xml');
	var range = require('../assets/range');
	var resources = require('../assets/resources');

	return {
		mimeTypes: {
			'gif' : 'image/gif',
			'png' : 'image/png',
			'jpg' : 'image/jpeg',
			'jpeg': 'image/jpeg',
			'svg' : 'image/svg+xml',
			'html': 'text/html',
			'htm' : 'text/html'
		},
		
		/**
		 * Extracts abbreviations from text stream, starting from the end
		 * @param {String} str
		 * @return {String} Abbreviation or empty string
		 * @memberOf emmet.actionUtils
		 */
		extractAbbreviation: function(str) {
			var curOffset = str.length;
			var startIndex = -1;
			var groupCount = 0;
			var braceCount = 0;
			var textCount = 0;
			
			while (true) {
				curOffset--;
				if (curOffset < 0) {
					// moved to the beginning of the line
					startIndex = 0;
					break;
				}
				
				var ch = str.charAt(curOffset);
				
				if (ch == ']') {
					braceCount++;
				} else if (ch == '[') {
					if (!braceCount) { // unexpected brace
						startIndex = curOffset + 1;
						break;
					}
					braceCount--;
				} else if (ch == '}') {
					textCount++;
				} else if (ch == '{') {
					if (!textCount) { // unexpected brace
						startIndex = curOffset + 1;
						break;
					}
					textCount--;
				} else if (ch == ')') {
					groupCount++;
				} else if (ch == '(') {
					if (!groupCount) { // unexpected brace
						startIndex = curOffset + 1;
						break;
					}
					groupCount--;
				} else {
					if (braceCount || textCount) 
						// respect all characters inside attribute sets or text nodes
						continue;
					else if (!abbreviationParser.isAllowedChar(ch) || (ch == '>' && utils.endsWithTag(str.substring(0, curOffset + 1)))) {
						// found stop symbol
						startIndex = curOffset + 1;
						break;
					}
				}
			}
			
			if (startIndex != -1 && !textCount && !braceCount && !groupCount) 
				// found something, remove some invalid symbols from the 
				// beginning and return abbreviation
				return str.substring(startIndex).replace(/^[\*\+\>\^]+/, '');
			else
				return '';
		},
		
		/**
		 * Gets image size from image byte stream.
		 * @author http://romeda.org/rePublish/
		 * @param {String} stream Image byte stream (use <code>IEmmetFile.read()</code>)
		 * @return {Object} Object with <code>width</code> and <code>height</code> properties
		 */
		getImageSize: function(stream) {
			var pngMagicNum = "\211PNG\r\n\032\n",
				jpgMagicNum = "\377\330",
				gifMagicNum = "GIF8",
				pos = 0,
				nextByte = function() {
					return stream.charCodeAt(pos++);
				};
		
			if (stream.substr(0, 8) === pngMagicNum) {
				// PNG. Easy peasy.
				pos = stream.indexOf('IHDR') + 4;
			
				return {
					width:  (nextByte() << 24) | (nextByte() << 16) | (nextByte() <<  8) | nextByte(),
					height: (nextByte() << 24) | (nextByte() << 16) | (nextByte() <<  8) | nextByte()
				};
			
			} else if (stream.substr(0, 4) === gifMagicNum) {
				pos = 6;
			
				return {
					width:  nextByte() | (nextByte() << 8),
					height: nextByte() | (nextByte() << 8)
				};
			
			} else if (stream.substr(0, 2) === jpgMagicNum) {
				pos = 2;
			
				var l = stream.length;
				while (pos < l) {
					if (nextByte() != 0xFF) return;
				
					var marker = nextByte();
					if (marker == 0xDA) break;
				
					var size = (nextByte() << 8) | nextByte();
				
					if (marker >= 0xC0 && marker <= 0xCF && !(marker & 0x4) && !(marker & 0x8)) {
						pos += 1;
						return {
							height: (nextByte() << 8) | nextByte(),
							width: (nextByte() << 8) | nextByte()
						};
				
					} else {
						pos += size - 2;
					}
				}
			}
		},
		
		/**
		 * Captures context XHTML element from editor under current caret position.
		 * This node can be used as a helper for abbreviation extraction
		 * @param {IEmmetEditor} editor
		 * @returns {Object}
		 */
		captureContext: function(editor, pos) {
			var allowedSyntaxes = {'html': 1, 'xml': 1, 'xsl': 1};
			var syntax = editor.getSyntax();
			if (syntax in allowedSyntaxes) {
				var content = editor.getContent();
				if (_.isUndefined(pos)) {
					pos = editor.getCaretPos();
				}

				var tag = htmlMatcher.find(content, pos);
				if (tag && tag.type == 'tag') {
					var startTag = tag.open;
					var contextNode = {
						name: startTag.name,
						attributes: [],
						match: tag
					};
					
					// parse attributes
					var tagTree = xmlEditTree.parse(startTag.range.substring(content));
					if (tagTree) {
						contextNode.attributes = _.map(tagTree.getAll(), function(item) {
							return {
								name: item.name(),
								value: item.value()
							};
						});
					}
					
					return contextNode;
				}
			}
			
			return null;
		},
		
		/**
		 * Find expression bounds in current editor at caret position. 
		 * On each character a <code>fn</code> function will be called and must 
		 * return <code>true</code> if current character meets requirements, 
		 * <code>false</code> otherwise
		 * @param {IEmmetEditor} editor
		 * @param {Function} fn Function to test each character of expression
		 * @return {Range}
		 */
		findExpressionBounds: function(editor, fn) {
			var content = String(editor.getContent());
			var il = content.length;
			var exprStart = editor.getCaretPos() - 1;
			var exprEnd = exprStart + 1;
				
			// start by searching left
			while (exprStart >= 0 && fn(content.charAt(exprStart), exprStart, content)) exprStart--;
			
			// then search right
			while (exprEnd < il && fn(content.charAt(exprEnd), exprEnd, content)) exprEnd++;
			
			if (exprEnd > exprStart) {
				return range([++exprStart, exprEnd]);
			}
		},
		
		/**
		 * @param {IEmmetEditor} editor
		 * @param {Object} data
		 * @returns {Boolean}
		 */
		compoundUpdate: function(editor, data) {
			if (data) {
				var sel = editor.getSelectionRange();
				editor.replaceContent(data.data, data.start, data.end, true);
				editor.createSelection(data.caret, data.caret + sel.end - sel.start);
				return true;
			}
			
			return false;
		},
		
		/**
		 * Common syntax detection method for editors that doesn’t provide any
		 * info about current syntax scope. 
		 * @param {IEmmetEditor} editor Current editor
		 * @param {String} hint Any syntax hint that editor can provide 
		 * for syntax detection. Default is 'html'
		 * @returns {String} 
		 */
		detectSyntax: function(editor, hint) {
			var syntax = hint || 'html';
			
			if (!resources.hasSyntax(syntax)) {
				syntax = 'html';
			}
			
			if (syntax == 'html' && (this.isStyle(editor) || this.isInlineCSS(editor))) {
				syntax = 'css';
			}

			if (syntax == 'styl') {
				syntax = 'stylus';
			}
			
			return syntax;
		},
		
		/**
		 * Common method for detecting output profile
		 * @param {IEmmetEditor} editor
		 * @returns {String}
		 */
		detectProfile: function(editor) {
			var syntax = editor.getSyntax();
			
			// get profile from syntax definition
			var profile = resources.findItem(syntax, 'profile');
			if (profile) {
				return profile;
			}
			
			switch(syntax) {
				case 'xml':
				case 'xsl':
					return 'xml';
				case 'css':
					if (this.isInlineCSS(editor)) {
						return 'line';
					}
					break;
				case 'html':
					profile = resources.getVariable('profile');
					if (!profile) { // no forced profile, guess from content
						// html or xhtml?
						profile = this.isXHTML(editor) ? 'xhtml': 'html';
					}

					return profile;
			}

			return 'xhtml';
		},
		
		/**
		 * Tries to detect if current document is XHTML one.
		 * @param {IEmmetEditor} editor
		 * @returns {Boolean}
		 */
		isXHTML: function(editor) {
			return editor.getContent().search(/<!DOCTYPE[^>]+XHTML/i) != -1;
		},

		/**
		 * Check if current caret position is inside &lt;style&gt; tag
		 * @param {IEmmetEditor} editor
		 * @returns {Range} Inner range of &lt;style&gt; tag
		 */
		isStyle: function(editor) {
			return !!cssSections.styleTagRange(editor.getContent(), editor.getCaretPos());
		},

		/**
		 * Check if given CSS dialect is supported by CSS actions
		 * @param  {String}  syntax
		 * @return {Boolean}
		 */
		isSupportedCSS: function(syntax) {
			return syntax == 'css' || syntax == 'less' || syntax == 'scss';
		},
		
		/**
		 * Check if current caret position is inside "style" attribute of HTML
		 * element
		 * @param {IEmmetEditor} editor
		 * @returns {Range} Inner range of style attribute
		 */
		isInlineCSS: function(editor) {
			return !!cssSections.styleAttrRange(editor.getContent(), editor.getCaretPos());
		}
	};
});
/**
 * Utility module used to prepare text for pasting into back-end editor
 * @author Sergey Chikuyonok (serge.che@gmail.com) <http://chikuyonok.ru>
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/editor',['require','exports','module','lodash','./common','../assets/resources'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('./common');
	var resources = require('../assets/resources');

	return  {
		/**
		 * Check if cursor is placed inside XHTML tag
		 * @param {String} html Contents of the document
		 * @param {Number} caretPos Current caret position inside tag
		 * @return {Boolean}
		 */
		isInsideTag: function(html, caretPos) {
			var reTag = /^<\/?\w[\w\:\-]*.*?>/;
			
			// search left to find opening brace
			var pos = caretPos;
			while (pos > -1) {
				if (html.charAt(pos) == '<') 
					break;
				pos--;
			}
			
			if (pos != -1) {
				var m = reTag.exec(html.substring(pos));
				if (m && caretPos > pos && caretPos < pos + m[0].length)
					return true;
			}
			
			return false;
		},
		
		/**
		 * Sanitizes incoming editor data and provides default values for
		 * output-specific info
		 * @param {IEmmetEditor} editor
		 * @param {String} syntax
		 * @param {String} profile
		 */
		outputInfo: function(editor, syntax, profile) {
			// most of this code makes sense for Java/Rhino environment
			// because string that comes from Java are not actually JS string
			// but Java String object so the have to be explicitly converted
			// to native string
			profile = profile || editor.getProfileName();
			return  {
				/** @memberOf outputInfo */
				syntax: String(syntax || editor.getSyntax()),
				profile: profile || null,
				content: String(editor.getContent())
			};
		},
		
		/**
		 * Unindent content, thus preparing text for tag wrapping
		 * @param {IEmmetEditor} editor Editor instance
		 * @param {String} text
		 * @return {String}
		 */
		unindent: function(editor, text) {
			return utils.unindentString(text, this.getCurrentLinePadding(editor));
		},
		
		/**
		 * Returns padding of current editor's line
		 * @param {IEmmetEditor} Editor instance
		 * @return {String}
		 */
		getCurrentLinePadding: function(editor) {
			return utils.getLinePadding(editor.getCurrentLine());
		},

		/**
		 * Normalizes content according to given preferences, e.g.
		 * replaces newlines and indentation with ones defined in
		 * `options`. If options are not provided or incomplete, 
		 * values will be taken from current user environment
		 * @param {String} text
		 * @param {Object} options
		 * @return {String}
		 */
		normalize: function(text, options) {
			options = _.extend({
				newline: resources.getNewline(),
				indentation: resources.getVariable('indentation')
			}, options);

			var reIndent = /^\t+/;
			var indent = function(tabs) {
				return utils.repeatString(options.indentation, tabs.length);
			};

			var lines = utils.splitByLines(text);

			// normailze indentation if it’s not tabs
			if (options.indentation !== '\t') {
				lines = _.map(lines, function(line) {
					return line.replace(reIndent, indent);
				});
			}

			// normalize newlines
			return lines.join(options.newline);
		}
	};
});

/**
 * Encodes/decodes image under cursor to/from base64
 * @param {IEmmetEditor} editor
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/base64',['require','exports','module','../plugin/file','../utils/base64','../utils/action','../utils/editor'],function(require, exports, module) {
	var file = require('../plugin/file');
	var base64 = require('../utils/base64');
	var actionUtils = require('../utils/action');
	var editorUtils = require('../utils/editor');
	
	/**
	 * Test if <code>text</code> starts with <code>token</code> at <code>pos</code>
	 * position. If <code>pos</code> is omitted, search from beginning of text 
	 * @param {String} token Token to test
	 * @param {String} text Where to search
	 * @param {Number} pos Position where to start search
	 * @return {Boolean}
	 * @since 0.65
	 */
	function startsWith(token, text, pos) {
		pos = pos || 0;
		return text.charAt(pos) == token.charAt(0) && text.substr(pos, token.length) == token;
	}
	
	/**
	 * Encodes image to base64
	 * 
	 * @param {IEmmetEditor} editor
	 * @param {String} imgPath Path to image
	 * @param {Number} pos Caret position where image is located in the editor
	 * @return {Boolean}
	 */
	function encodeToBase64(editor, imgPath, pos) {
		var editorFile = editor.getFilePath();
		var defaultMimeType = 'application/octet-stream';
			
		if (editorFile === null) {
			throw "You should save your file before using this action";
		}
		
		// locate real image path
		var realImgPath = file.locateFile(editorFile, imgPath);
		if (realImgPath === null) {
			throw "Can't find " + imgPath + ' file';
		}
		
		file.read(realImgPath, function(err, content) {
			if (err) {
				throw 'Unable to read ' + realImgPath + ': ' + err;
			}
			
			var b64 = base64.encode(String(content));
			if (!b64) {
				throw "Can't encode file content to base64";
			}
			
			b64 = 'data:' + (actionUtils.mimeTypes[String(file.getExt(realImgPath))] || defaultMimeType) +
				';base64,' + b64;
				
			editor.replaceContent('$0' + b64, pos, pos + imgPath.length);
		});
		
		return true;
	}

	/**
	 * Decodes base64 string back to file.
	 * @param {IEmmetEditor} editor
	 * @param {String} data Base64-encoded file content
	 * @param {Number} pos Caret position where image is located in the editor
	 */
	function decodeFromBase64(editor, data, pos) {
		// ask user to enter path to file
		var filePath = String(editor.prompt('Enter path to file (absolute or relative)'));
		if (!filePath)
			return false;
			
		var absPath = file.createPath(editor.getFilePath(), filePath);
		if (!absPath) {
			throw "Can't save file";
		}
		
		file.save(absPath, base64.decode( data.replace(/^data\:.+?;.+?,/, '') ));
		editor.replaceContent('$0' + filePath, pos, pos + data.length);
		return true;
	}

	return {
		/**
		 * Action to encode or decode file to data:url
		 * @param  {IEmmetEditor} editor  Editor instance
		 * @param  {String} syntax  Current document syntax
		 * @param  {String} profile Output profile name
		 * @return {Boolean}
		 */
		encodeDecodeDataUrlAction: function(editor) {
			var data = String(editor.getSelection());
			var caretPos = editor.getCaretPos();
			var info = editorUtils.outputInfo(editor);
				
			if (!data) {
				// no selection, try to find image bounds from current caret position
				var text = info.content, m;
				while (caretPos-- >= 0) {
					if (startsWith('src=', text, caretPos)) { // found <img src="">
						if ((m = text.substr(caretPos).match(/^(src=(["'])?)([^'"<>\s]+)\1?/))) {
							data = m[3];
							caretPos += m[1].length;
						}
						break;
					} else if (startsWith('url(', text, caretPos)) { // found CSS url() pattern
						if ((m = text.substr(caretPos).match(/^(url\((['"])?)([^'"\)\s]+)\1?/))) {
							data = m[3];
							caretPos += m[1].length;
						}
						break;
					}
				}
			}
			
			if (data) {
				if (startsWith('data:', data)) {
					return decodeFromBase64(editor, data, caretPos);
				} else {
					return encodeToBase64(editor, data, caretPos);
				}
			}
			
			return false;
		}
	};
});

/**
 * Move between next/prev edit points. 'Edit points' are places between tags 
 * and quotes of empty attributes in html
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/editPoints',['require','exports','module'],function(require, exports, module) {
	/**
	 * Search for new caret insertion point
	 * @param {IEmmetEditor} editor Editor instance
	 * @param {Number} inc Search increment: -1 — search left, 1 — search right
	 * @param {Number} offset Initial offset relative to current caret position
	 * @return {Number} Returns -1 if insertion point wasn't found
	 */
	function findNewEditPoint(editor, inc, offset) {
		inc = inc || 1;
		offset = offset || 0;
		
		var curPoint = editor.getCaretPos() + offset;
		var content = String(editor.getContent());
		var maxLen = content.length;
		var nextPoint = -1;
		var reEmptyLine = /^\s+$/;
		
		function getLine(ix) {
			var start = ix;
			while (start >= 0) {
				var c = content.charAt(start);
				if (c == '\n' || c == '\r')
					break;
				start--;
			}
			
			return content.substring(start, ix);
		}
			
		while (curPoint <= maxLen && curPoint >= 0) {
			curPoint += inc;
			var curChar = content.charAt(curPoint);
			var nextChar = content.charAt(curPoint + 1);
			var prevChar = content.charAt(curPoint - 1);
				
			switch (curChar) {
				case '"':
				case '\'':
					if (nextChar == curChar && prevChar == '=') {
						// empty attribute
						nextPoint = curPoint + 1;
					}
					break;
				case '>':
					if (nextChar == '<') {
						// between tags
						nextPoint = curPoint + 1;
					}
					break;
				case '\n':
				case '\r':
					// empty line
					if (reEmptyLine.test(getLine(curPoint - 1))) {
						nextPoint = curPoint;
					}
					break;
			}
			
			if (nextPoint != -1)
				break;
		}
		
		return nextPoint;
	}
	
	return {
		/**
		 * Move to previous edit point
		 * @param  {IEmmetEditor} editor  Editor instance
		 * @param  {String} syntax  Current document syntax
		 * @param  {String} profile Output profile name
		 * @return {Boolean}
		 */
		previousEditPointAction: function(editor, syntax, profile) {
			var curPos = editor.getCaretPos();
			var newPoint = findNewEditPoint(editor, -1);
				
			if (newPoint == curPos)
				// we're still in the same point, try searching from the other place
				newPoint = findNewEditPoint(editor, -1, -2);
			
			if (newPoint != -1) {
				editor.setCaretPos(newPoint);
				return true;
			}
			
			return false;
		},

		/**
		 * Move to next edit point
		 * @param  {IEmmetEditor} editor  Editor instance
		 * @param  {String} syntax  Current document syntax
		 * @param  {String} profile Output profile name
		 * @return {Boolean}
		 */
		nextEditPointAction: function(editor, syntax, profile) {
			var newPoint = findNewEditPoint(editor, 1);
			if (newPoint != -1) {
				editor.setCaretPos(newPoint);
				return true;
			}
			
			return false;
		}
	};
});
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('utils/math',['require','exports','module'],function(require, exports, module) {
	/*
	 Source: https://github.com/silentmatt/js-expression-eval

	 Based on ndef.parser, by Raphael Graf(r@undefined.ch)
	 http://www.undefined.ch/mparser/index.html

	 Ported to JavaScript and modified by Matthew Crumley (email@matthewcrumley.com, http://silentmatt.com/)

	 You are free to use and modify this code in anyway you find useful. Please leave this comment in the code
	 to acknowledge its original source. If you feel like it, I enjoy hearing about projects that use my code,
	 but don't feel like you have to let me know or ask permission.
	*/

	function object(o) {
		function F() {}
		F.prototype = o;
		return new F();
	}

	var TNUMBER = 0;
	var TOP1 = 1;
	var TOP2 = 2;
	var TVAR = 3;
	var TFUNCALL = 4;

	function Token(type_, index_, prio_, number_) {
		this.type_ = type_;
		this.index_ = index_ || 0;
		this.prio_ = prio_ || 0;
		this.number_ = (number_ !== undefined && number_ !== null) ? number_ : 0;
		this.toString = function () {
			switch (this.type_) {
			case TNUMBER:
				return this.number_;
			case TOP1:
			case TOP2:
			case TVAR:
				return this.index_;
			case TFUNCALL:
				return "CALL";
			default:
				return "Invalid Token";
			}
		};
	}

	function Expression(tokens, ops1, ops2, functions) {
		this.tokens = tokens;
		this.ops1 = ops1;
		this.ops2 = ops2;
		this.functions = functions;
	}

	// Based on http://www.json.org/json2.js
    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        escapable = /[\\\'\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        meta = {    // table of character substitutions
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            "'" : "\\'",
            '\\': '\\\\'
        };

	function escapeValue(v) {
		if (typeof v === "string") {
			escapable.lastIndex = 0;
	        return escapable.test(v) ?
	            "'" + v.replace(escapable, function (a) {
	                var c = meta[a];
	                return typeof c === 'string' ? c :
	                    '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
	            }) + "'" :
	            "'" + v + "'";
		}
		return v;
	}

	Expression.prototype = {
		simplify: function (values) {
			values = values || {};
			var nstack = [];
			var newexpression = [];
			var n1;
			var n2;
			var f;
			var L = this.tokens.length;
			var item;
			var i = 0;
			for (i = 0; i < L; i++) {
				item = this.tokens[i];
				var type_ = item.type_;
				if (type_ === TNUMBER) {
					nstack.push(item);
				}
				else if (type_ === TVAR && (item.index_ in values)) {
					item = new Token(TNUMBER, 0, 0, values[item.index_]);
					nstack.push(item);
				}
				else if (type_ === TOP2 && nstack.length > 1) {
					n2 = nstack.pop();
					n1 = nstack.pop();
					f = this.ops2[item.index_];
					item = new Token(TNUMBER, 0, 0, f(n1.number_, n2.number_));
					nstack.push(item);
				}
				else if (type_ === TOP1 && nstack.length > 0) {
					n1 = nstack.pop();
					f = this.ops1[item.index_];
					item = new Token(TNUMBER, 0, 0, f(n1.number_));
					nstack.push(item);
				}
				else {
					while (nstack.length > 0) {
						newexpression.push(nstack.shift());
					}
					newexpression.push(item);
				}
			}
			while (nstack.length > 0) {
				newexpression.push(nstack.shift());
			}

			return new Expression(newexpression, object(this.ops1), object(this.ops2), object(this.functions));
		},

		substitute: function (variable, expr) {
			if (!(expr instanceof Expression)) {
				expr = new Parser().parse(String(expr));
			}
			var newexpression = [];
			var L = this.tokens.length;
			var item;
			var i = 0;
			for (i = 0; i < L; i++) {
				item = this.tokens[i];
				var type_ = item.type_;
				if (type_ === TVAR && item.index_ === variable) {
					for (var j = 0; j < expr.tokens.length; j++) {
						var expritem = expr.tokens[j];
						var replitem = new Token(expritem.type_, expritem.index_, expritem.prio_, expritem.number_);
						newexpression.push(replitem);
					}
				}
				else {
					newexpression.push(item);
				}
			}

			var ret = new Expression(newexpression, object(this.ops1), object(this.ops2), object(this.functions));
			return ret;
		},

		evaluate: function (values) {
			values = values || {};
			var nstack = [];
			var n1;
			var n2;
			var f;
			var L = this.tokens.length;
			var item;
			var i = 0;
			for (i = 0; i < L; i++) {
				item = this.tokens[i];
				var type_ = item.type_;
				if (type_ === TNUMBER) {
					nstack.push(item.number_);
				}
				else if (type_ === TOP2) {
					n2 = nstack.pop();
					n1 = nstack.pop();
					f = this.ops2[item.index_];
					nstack.push(f(n1, n2));
				}
				else if (type_ === TVAR) {
					if (item.index_ in values) {
						nstack.push(values[item.index_]);
					}
					else if (item.index_ in this.functions) {
						nstack.push(this.functions[item.index_]);
					}
					else {
						throw new Error("undefined variable: " + item.index_);
					}
				}
				else if (type_ === TOP1) {
					n1 = nstack.pop();
					f = this.ops1[item.index_];
					nstack.push(f(n1));
				}
				else if (type_ === TFUNCALL) {
					n1 = nstack.pop();
					f = nstack.pop();
					if (f.apply && f.call) {
						if (Object.prototype.toString.call(n1) == "[object Array]") {
							nstack.push(f.apply(undefined, n1));
						}
						else {
							nstack.push(f.call(undefined, n1));
						}
					}
					else {
						throw new Error(f + " is not a function");
					}
				}
				else {
					throw new Error("invalid Expression");
				}
			}
			if (nstack.length > 1) {
				throw new Error("invalid Expression (parity)");
			}
			return nstack[0];
		},

		toString: function (toJS) {
			var nstack = [];
			var n1;
			var n2;
			var f;
			var L = this.tokens.length;
			var item;
			var i = 0;
			for (i = 0; i < L; i++) {
				item = this.tokens[i];
				var type_ = item.type_;
				if (type_ === TNUMBER) {
					nstack.push(escapeValue(item.number_));
				}
				else if (type_ === TOP2) {
					n2 = nstack.pop();
					n1 = nstack.pop();
					f = item.index_;
					if (toJS && f == "^") {
						nstack.push("Math.pow(" + n1 + "," + n2 + ")");
					}
					else {
						nstack.push("(" + n1 + f + n2 + ")");
					}
				}
				else if (type_ === TVAR) {
					nstack.push(item.index_);
				}
				else if (type_ === TOP1) {
					n1 = nstack.pop();
					f = item.index_;
					if (f === "-") {
						nstack.push("(" + f + n1 + ")");
					}
					else {
						nstack.push(f + "(" + n1 + ")");
					}
				}
				else if (type_ === TFUNCALL) {
					n1 = nstack.pop();
					f = nstack.pop();
					nstack.push(f + "(" + n1 + ")");
				}
				else {
					throw new Error("invalid Expression");
				}
			}
			if (nstack.length > 1) {
				throw new Error("invalid Expression (parity)");
			}
			return nstack[0];
		},

		variables: function () {
			var L = this.tokens.length;
			var vars = [];
			for (var i = 0; i < L; i++) {
				var item = this.tokens[i];
				if (item.type_ === TVAR && (vars.indexOf(item.index_) == -1)) {
					vars.push(item.index_);
				}
			}

			return vars;
		},

		toJSFunction: function (param, variables) {
			var f = new Function(param, "with(Parser.values) { return " + this.simplify(variables).toString(true) + "; }");
			return f;
		}
	};

	function add(a, b) {
		return Number(a) + Number(b);
	}
	function sub(a, b) {
		return a - b; 
	}
	function mul(a, b) {
		return a * b;
	}
	function div(a, b) {
		return a / b;
	}
	function mod(a, b) {
		return a % b;
	}
	function concat(a, b) {
		return "" + a + b;
	}

	function neg(a) {
		return -a;
	}

	function random(a) {
		return Math.random() * (a || 1);
	}
	function fac(a) { //a!
		a = Math.floor(a);
		var b = a;
		while (a > 1) {
			b = b * (--a);
		}
		return b;
	}

	// TODO: use hypot that doesn't overflow
	function pyt(a, b) {
		return Math.sqrt(a * a + b * b);
	}

	function append(a, b) {
		if (Object.prototype.toString.call(a) != "[object Array]") {
			return [a, b];
		}
		a = a.slice();
		a.push(b);
		return a;
	}

	function Parser() {
		this.success = false;
		this.errormsg = "";
		this.expression = "";

		this.pos = 0;

		this.tokennumber = 0;
		this.tokenprio = 0;
		this.tokenindex = 0;
		this.tmpprio = 0;

		this.ops1 = {
			"sin": Math.sin,
			"cos": Math.cos,
			"tan": Math.tan,
			"asin": Math.asin,
			"acos": Math.acos,
			"atan": Math.atan,
			"sqrt": Math.sqrt,
			"log": Math.log,
			"abs": Math.abs,
			"ceil": Math.ceil,
			"floor": Math.floor,
			"round": Math.round,
			"-": neg,
			"exp": Math.exp
		};

		this.ops2 = {
			"+": add,
			"-": sub,
			"*": mul,
			"/": div,
			"%": mod,
			"^": Math.pow,
			",": append,
			"||": concat
		};

		this.functions = {
			"random": random,
			"fac": fac,
			"min": Math.min,
			"max": Math.max,
			"pyt": pyt,
			"pow": Math.pow,
			"atan2": Math.atan2
		};

		this.consts = {
			"E": Math.E,
			"PI": Math.PI
		};
	}

	Parser.parse = function (expr) {
		return new Parser().parse(expr);
	};

	Parser.evaluate = function (expr, variables) {
		return Parser.parse(expr).evaluate(variables);
	};

	Parser.Expression = Expression;

	Parser.values = {
		sin: Math.sin,
		cos: Math.cos,
		tan: Math.tan,
		asin: Math.asin,
		acos: Math.acos,
		atan: Math.atan,
		sqrt: Math.sqrt,
		log: Math.log,
		abs: Math.abs,
		ceil: Math.ceil,
		floor: Math.floor,
		round: Math.round,
		random: random,
		fac: fac,
		exp: Math.exp,
		min: Math.min,
		max: Math.max,
		pyt: pyt,
		pow: Math.pow,
		atan2: Math.atan2,
		E: Math.E,
		PI: Math.PI
	};

	var PRIMARY      = 1 << 0;
	var OPERATOR     = 1 << 1;
	var FUNCTION     = 1 << 2;
	var LPAREN       = 1 << 3;
	var RPAREN       = 1 << 4;
	var COMMA        = 1 << 5;
	var SIGN         = 1 << 6;
	var CALL         = 1 << 7;
	var NULLARY_CALL = 1 << 8;

	Parser.prototype = {
		parse: function (expr) {
			this.errormsg = "";
			this.success = true;
			var operstack = [];
			var tokenstack = [];
			this.tmpprio = 0;
			var expected = (PRIMARY | LPAREN | FUNCTION | SIGN);
			var noperators = 0;
			this.expression = expr;
			this.pos = 0;

			while (this.pos < this.expression.length) {
				if (this.isOperator()) {
					if (this.isSign() && (expected & SIGN)) {
						if (this.isNegativeSign()) {
							this.tokenprio = 2;
							this.tokenindex = "-";
							noperators++;
							this.addfunc(tokenstack, operstack, TOP1);
						}
						expected = (PRIMARY | LPAREN | FUNCTION | SIGN);
					}
					else if (this.isComment()) {

					}
					else {
						if ((expected & OPERATOR) === 0) {
							this.error_parsing(this.pos, "unexpected operator");
						}
						noperators += 2;
						this.addfunc(tokenstack, operstack, TOP2);
						expected = (PRIMARY | LPAREN | FUNCTION | SIGN);
					}
				}
				else if (this.isNumber()) {
					if ((expected & PRIMARY) === 0) {
						this.error_parsing(this.pos, "unexpected number");
					}
					var token = new Token(TNUMBER, 0, 0, this.tokennumber);
					tokenstack.push(token);

					expected = (OPERATOR | RPAREN | COMMA);
				}
				else if (this.isString()) {
					if ((expected & PRIMARY) === 0) {
						this.error_parsing(this.pos, "unexpected string");
					}
					var token = new Token(TNUMBER, 0, 0, this.tokennumber);
					tokenstack.push(token);

					expected = (OPERATOR | RPAREN | COMMA);
				}
				else if (this.isLeftParenth()) {
					if ((expected & LPAREN) === 0) {
						this.error_parsing(this.pos, "unexpected \"(\"");
					}

					if (expected & CALL) {
						noperators += 2;
						this.tokenprio = -2;
						this.tokenindex = -1;
						this.addfunc(tokenstack, operstack, TFUNCALL);
					}

					expected = (PRIMARY | LPAREN | FUNCTION | SIGN | NULLARY_CALL);
				}
				else if (this.isRightParenth()) {
				    if (expected & NULLARY_CALL) {
						var token = new Token(TNUMBER, 0, 0, []);
						tokenstack.push(token);
					}
					else if ((expected & RPAREN) === 0) {
						this.error_parsing(this.pos, "unexpected \")\"");
					}

					expected = (OPERATOR | RPAREN | COMMA | LPAREN | CALL);
				}
				else if (this.isComma()) {
					if ((expected & COMMA) === 0) {
						this.error_parsing(this.pos, "unexpected \",\"");
					}
					this.addfunc(tokenstack, operstack, TOP2);
					noperators += 2;
					expected = (PRIMARY | LPAREN | FUNCTION | SIGN);
				}
				else if (this.isConst()) {
					if ((expected & PRIMARY) === 0) {
						this.error_parsing(this.pos, "unexpected constant");
					}
					var consttoken = new Token(TNUMBER, 0, 0, this.tokennumber);
					tokenstack.push(consttoken);
					expected = (OPERATOR | RPAREN | COMMA);
				}
				else if (this.isOp2()) {
					if ((expected & FUNCTION) === 0) {
						this.error_parsing(this.pos, "unexpected function");
					}
					this.addfunc(tokenstack, operstack, TOP2);
					noperators += 2;
					expected = (LPAREN);
				}
				else if (this.isOp1()) {
					if ((expected & FUNCTION) === 0) {
						this.error_parsing(this.pos, "unexpected function");
					}
					this.addfunc(tokenstack, operstack, TOP1);
					noperators++;
					expected = (LPAREN);
				}
				else if (this.isVar()) {
					if ((expected & PRIMARY) === 0) {
						this.error_parsing(this.pos, "unexpected variable");
					}
					var vartoken = new Token(TVAR, this.tokenindex, 0, 0);
					tokenstack.push(vartoken);

					expected = (OPERATOR | RPAREN | COMMA | LPAREN | CALL);
				}
				else if (this.isWhite()) {
				}
				else {
					if (this.errormsg === "") {
						this.error_parsing(this.pos, "unknown character");
					}
					else {
						this.error_parsing(this.pos, this.errormsg);
					}
				}
			}
			if (this.tmpprio < 0 || this.tmpprio >= 10) {
				this.error_parsing(this.pos, "unmatched \"()\"");
			}
			while (operstack.length > 0) {
				var tmp = operstack.pop();
				tokenstack.push(tmp);
			}
			if (noperators + 1 !== tokenstack.length) {
				//print(noperators + 1);
				//print(tokenstack);
				this.error_parsing(this.pos, "parity");
			}

			return new Expression(tokenstack, object(this.ops1), object(this.ops2), object(this.functions));
		},

		evaluate: function (expr, variables) {
			return this.parse(expr).evaluate(variables);
		},

		error_parsing: function (column, msg) {
			this.success = false;
			this.errormsg = "parse error [column " + (column) + "]: " + msg;
			throw new Error(this.errormsg);
		},

//\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

		addfunc: function (tokenstack, operstack, type_) {
			var operator = new Token(type_, this.tokenindex, this.tokenprio + this.tmpprio, 0);
			while (operstack.length > 0) {
				if (operator.prio_ <= operstack[operstack.length - 1].prio_) {
					tokenstack.push(operstack.pop());
				}
				else {
					break;
				}
			}
			operstack.push(operator);
		},

		isNumber: function () {
			var r = false;
			var str = "";
			while (this.pos < this.expression.length) {
				var code = this.expression.charCodeAt(this.pos);
				if ((code >= 48 && code <= 57) || code === 46) {
					str += this.expression.charAt(this.pos);
					this.pos++;
					this.tokennumber = parseFloat(str);
					r = true;
				}
				else {
					break;
				}
			}
			return r;
		},

		// Ported from the yajjl JSON parser at http://code.google.com/p/yajjl/
		unescape: function(v, pos) {
			var buffer = [];
			var escaping = false;

			for (var i = 0; i < v.length; i++) {
				var c = v.charAt(i);
	
				if (escaping) {
					switch (c) {
					case "'":
						buffer.push("'");
						break;
					case '\\':
						buffer.push('\\');
						break;
					case '/':
						buffer.push('/');
						break;
					case 'b':
						buffer.push('\b');
						break;
					case 'f':
						buffer.push('\f');
						break;
					case 'n':
						buffer.push('\n');
						break;
					case 'r':
						buffer.push('\r');
						break;
					case 't':
						buffer.push('\t');
						break;
					case 'u':
						// interpret the following 4 characters as the hex of the unicode code point
						var codePoint = parseInt(v.substring(i + 1, i + 5), 16);
						buffer.push(String.fromCharCode(codePoint));
						i += 4;
						break;
					default:
						throw this.error_parsing(pos + i, "Illegal escape sequence: '\\" + c + "'");
					}
					escaping = false;
				} else {
					if (c == '\\') {
						escaping = true;
					} else {
						buffer.push(c);
					}
				}
			}
	
			return buffer.join('');
		},

		isString: function () {
			var r = false;
			var str = "";
			var startpos = this.pos;
			if (this.pos < this.expression.length && this.expression.charAt(this.pos) == "'") {
				this.pos++;
				while (this.pos < this.expression.length) {
					var code = this.expression.charAt(this.pos);
					if (code != "'" || str.slice(-1) == "\\") {
						str += this.expression.charAt(this.pos);
						this.pos++;
					}
					else {
						this.pos++;
						this.tokennumber = this.unescape(str, startpos);
						r = true;
						break;
					}
				}
			}
			return r;
		},

		isConst: function () {
			var str;
			for (var i in this.consts) {
				if (true) {
					var L = i.length;
					str = this.expression.substr(this.pos, L);
					if (i === str) {
						this.tokennumber = this.consts[i];
						this.pos += L;
						return true;
					}
				}
			}
			return false;
		},

		isOperator: function () {
			var code = this.expression.charCodeAt(this.pos);
			if (code === 43) { // +
				this.tokenprio = 0;
				this.tokenindex = "+";
			}
			else if (code === 45) { // -
				this.tokenprio = 0;
				this.tokenindex = "-";
			}
			else if (code === 124) { // |
				if (this.expression.charCodeAt(this.pos + 1) === 124) {
					this.pos++;
					this.tokenprio = 0;
					this.tokenindex = "||";
				}
				else {
					return false;
				}
			}
			else if (code === 42) { // *
				this.tokenprio = 1;
				this.tokenindex = "*";
			}
			else if (code === 47) { // /
				this.tokenprio = 2;
				this.tokenindex = "/";
			}
			else if (code === 37) { // %
				this.tokenprio = 2;
				this.tokenindex = "%";
			}
			else if (code === 94) { // ^
				this.tokenprio = 3;
				this.tokenindex = "^";
			}
			else {
				return false;
			}
			this.pos++;
			return true;
		},

		isSign: function () {
			var code = this.expression.charCodeAt(this.pos - 1);
			if (code === 45 || code === 43) { // -
				return true;
			}
			return false;
		},

		isPositiveSign: function () {
			var code = this.expression.charCodeAt(this.pos - 1);
			if (code === 43) { // -
				return true;
			}
			return false;
		},

		isNegativeSign: function () {
			var code = this.expression.charCodeAt(this.pos - 1);
			if (code === 45) { // -
				return true;
			}
			return false;
		},

		isLeftParenth: function () {
			var code = this.expression.charCodeAt(this.pos);
			if (code === 40) { // (
				this.pos++;
				this.tmpprio += 10;
				return true;
			}
			return false;
		},

		isRightParenth: function () {
			var code = this.expression.charCodeAt(this.pos);
			if (code === 41) { // )
				this.pos++;
				this.tmpprio -= 10;
				return true;
			}
			return false;
		},

		isComma: function () {
			var code = this.expression.charCodeAt(this.pos);
			if (code === 44) { // ,
				this.pos++;
				this.tokenprio = -1;
				this.tokenindex = ",";
				return true;
			}
			return false;
		},

		isWhite: function () {
			var code = this.expression.charCodeAt(this.pos);
			if (code === 32 || code === 9 || code === 10 || code === 13) {
				this.pos++;
				return true;
			}
			return false;
		},

		isOp1: function () {
			var str = "";
			for (var i = this.pos; i < this.expression.length; i++) {
				var c = this.expression.charAt(i);
				if (c.toUpperCase() === c.toLowerCase()) {
					if (i === this.pos || (c != '_' && (c < '0' || c > '9'))) {
						break;
					}
				}
				str += c;
			}
			if (str.length > 0 && (str in this.ops1)) {
				this.tokenindex = str;
				this.tokenprio = 5;
				this.pos += str.length;
				return true;
			}
			return false;
		},

		isOp2: function () {
			var str = "";
			for (var i = this.pos; i < this.expression.length; i++) {
				var c = this.expression.charAt(i);
				if (c.toUpperCase() === c.toLowerCase()) {
					if (i === this.pos || (c != '_' && (c < '0' || c > '9'))) {
						break;
					}
				}
				str += c;
			}
			if (str.length > 0 && (str in this.ops2)) {
				this.tokenindex = str;
				this.tokenprio = 5;
				this.pos += str.length;
				return true;
			}
			return false;
		},

		isVar: function () {
			var str = "";
			for (var i = this.pos; i < this.expression.length; i++) {
				var c = this.expression.charAt(i);
				if (c.toUpperCase() === c.toLowerCase()) {
					if (i === this.pos || (c != '_' && (c < '0' || c > '9'))) {
						break;
					}
				}
				str += c;
			}
			if (str.length > 0) {
				this.tokenindex = str;
				this.tokenprio = 4;
				this.pos += str.length;
				return true;
			}
			return false;
		},

		isComment: function () {
			var code = this.expression.charCodeAt(this.pos - 1);
			if (code === 47 && this.expression.charCodeAt(this.pos) === 42) {
				this.pos = this.expression.indexOf("*/", this.pos) + 2;
				if (this.pos === 1) {
					this.pos = this.expression.length;
				}
				return true;
			}
			return false;
		}
	};

	return Parser;
});
/**
 * Evaluates simple math expression under caret
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/evaluateMath',['require','exports','module','../utils/action','../utils/common','../utils/math','../assets/range'],function(require, exports, module) {
	var actionUtils = require('../utils/action');
	var utils = require('../utils/common');
	var math = require('../utils/math');
	var range = require('../assets/range');

	return {
		/**
		 * Evaluates math expression under the caret
		 * @param  {IEmmetEditor} editor
		 * @return {Boolean}
		 */
		evaluateMathAction: function(editor) {
			var content = editor.getContent();
			var chars = '.+-*/\\';
			
			/** @type Range */
			var sel = range(editor.getSelectionRange());
			if (!sel.length()) {
				sel = actionUtils.findExpressionBounds(editor, function(ch) {
					return utils.isNumeric(ch) || chars.indexOf(ch) != -1;
				});
			}
			
			if (sel && sel.length()) {
				var expr = sel.substring(content);
				
				// replace integral division: 11\2 => Math.round(11/2) 
				expr = expr.replace(/([\d\.\-]+)\\([\d\.\-]+)/g, 'round($1/$2)');
				
				try {
					var result = utils.prettifyNumber(math.evaluate(expr));
					editor.replaceContent(result, sel.start, sel.end);
					editor.setCaretPos(sel.start + result.length);
					return true;
				} catch (e) {}
			}
			
			return false;
		}
	};
});

/**
 * CSS linear gradient definition
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('resolver/gradient/linear',['require','exports','module','lodash','../../assets/stringStream','../../utils/common'],function(require, exports, module) {
	var _ = require('lodash');
	var stringStream = require('../../assets/stringStream');
	var utils = require('../../utils/common');

	// all directions are expressed in “new style” degrees
	var directions = {
		'bottom': 0,
		'bottom left': 45,
		'left': 90,
		'top left': 135,
		'top': 180,
		'top right': 225,
		'right': 270,
		'bottom right': 315,
		
		'to top': 0,
		'to top right': 45,
		'to right': 90,
		'to bottom right': 135,
		'to bottom': 180,
		'to bottom left': 225,
		'to left': 270,
		'to top left': 315
	};

	var defaultDirections = ['top', 'to bottom', '0deg'];


	var reLinearGradient = /^\s*(\-[a-z]+\-)?(lg|linear\-gradient)\s*\(/i;
	var reDeg = /(\d+)deg/i;
	var reKeyword = /top|bottom|left|right/i;

	function LinearGradient(dfn) {
		this.colorStops = [];
		this.direction = 180;

		// extract tokens
		var stream = stringStream.create(utils.trim(dfn));
		var ch, cur;
		while ((ch = stream.next())) {
			if (stream.peek() == ',') {
				// Is it a first entry? Check if it’s a direction
				cur = stream.current();

				if (!this.colorStops.length && (reDeg.test(cur) || reKeyword.test(cur))) {
					this.direction = resolveDirection(cur);
				} else {
					this.addColorStop(cur);
				}
				
				stream.next();
				stream.eatSpace();
				stream.start = stream.pos;
			} else if (ch == '(') { // color definition, like 'rgb(0,0,0)'
				stream.skipTo(')');
			}
		}
		
		// add last token
		this.addColorStop(stream.current());		
	}

	LinearGradient.prototype = {
		type: 'linear-gradient',
		addColorStop: function(color, ix) {
			color = normalizeSpace(color || '');
			if (!color) {
				return;
			}

			color = this.parseColorStop(color);

			if (_.isUndefined(ix)) {
				this.colorStops.push(color);
			} else {
				this.colorStops.splice(ix, 0, color);
			}
		},

		/**
		 * Parses color stop definition
		 * @param {String} colorStop
		 * @returns {Object}
		 */
		parseColorStop: function(colorStop) {
			colorStop = normalizeSpace(colorStop);
			
			// find color declaration
			// first, try complex color declaration, like rgb(0,0,0)
			var color = null;
			colorStop = colorStop.replace(/^(\w+\(.+?\))\s*/, function(str, c) {
				color = c;
				return '';
			});
			
			if (!color) {
				// try simple declaration, like yellow, #fco, #ffffff, etc.
				var parts = colorStop.split(' ');
				color = parts[0];
				colorStop = parts[1] || '';
			}
			
			var result = {
				color: color
			};
			
			if (colorStop) {
				// there's position in color stop definition
				colorStop.replace(/^(\-?[\d\.]+)([a-z%]+)?$/, function(str, pos, unit) {
					result.position = pos;
					if (~pos.indexOf('.')) {
						unit = '';
					} else if (!unit) {
						unit = '%';
					}
					
					if (unit) {
						result.unit = unit;
					}
				});
			}
			
			return result;
		},

		stringify: function(options) {
			options = options || {};
			var fn = 'linear-gradient';
			if (options.prefix) {
				fn = '-' + options.prefix + '-' + fn;
			}
				
			// transform color-stops
			var parts = _.map(this.colorStops, function(cs) {
				var pos = cs.position ? ' ' + cs.position + (cs.unit || '') : '';
				return cs.color + pos;
			});

			var dir = stringifyDirection(this.direction, !!options.prefix);
			if (!options.omitDefaultDirection || !_.include(defaultDirections, dir)) {
				parts.unshift(dir);
			}

			return fn + '(' + parts.join(', ') + ')';
		},

		stringifyOldWebkit: function() {
			var colorStops = _.map(this.colorStops, _.clone);
			
			// normalize color-stops position
			_.each(colorStops, function(cs) {
				if (!('position' in cs)) // implied position
					return;
				
				if (~cs.position.indexOf('.') || cs.unit == '%') {
					cs.position = parseFloat(cs.position) / (cs.unit == '%' ? 100 : 1);
				} else {
					throw "Can't convert color stop '" + (cs.position + (cs.unit || '')) + "'";
				}
			});
			
			this._fillImpliedPositions(colorStops);
			
			// transform color-stops into string representation
			colorStops = _.map(colorStops, function(cs, i) {
				if (!cs.position && !i) {
					return 'from(' + cs.color + ')';
				}
				
				if (cs.position == 1 && i == colorStops.length - 1) {
					return 'to(' + cs.color + ')';
				}
				
				return 'color-stop(' + (cs.position.toFixed(2).replace(/\.?0+$/, '')) + ', ' + cs.color + ')';
			});
			
			return '-webkit-gradient(linear, ' 
				+ oldWebkitDirection((this.direction + 180) % 360)
				+ ', '
				+ colorStops.join(', ')
				+ ')';
		},

		/**
		 * Fills-out implied positions in color-stops. This function is useful for
		 * old Webkit gradient definitions
		 */
		_fillImpliedPositions: function(colorStops) {
			var from = 0;
			
			_.each(colorStops, function(cs, i) {
				// make sure that first and last positions are defined
				if (!i) {
					return cs.position = cs.position || 0;
				}
				
				if (i == colorStops.length - 1 && !('position' in cs)) {
					cs.position = 1;
				}
				
				if ('position' in cs) {
					var start = colorStops[from].position || 0;
					var step = (cs.position - start) / (i - from);
					_.each(colorStops.slice(from, i), function(cs2, j) {
						cs2.position = start + step * j;
					});
					
					from = i;
				}
			});
		},

		valueOf: function() {
			return this.stringify();
		}
	};

	function normalizeSpace(str) {
		return utils.trim(str).replace(/\s+/g, ' ');
	}

	/**
	 * Resolves textual direction to degrees
	 * @param  {String} dir Direction to resolve
	 * @return {Number}
	 */
	function resolveDirection(dir) {
		if (typeof dir == 'number') {
			return dir;
		}

		dir = normalizeSpace(dir).toLowerCase();
		if (reDeg.test(dir)) {
			return +RegExp.$1;
		}

		var prefix = /^to\s/.test(dir) ? 'to ' : '';
		var left   = ~dir.indexOf('left')   && 'left';
		var right  = ~dir.indexOf('right')  && 'right';
		var top    = ~dir.indexOf('top')    && 'top';
		var bottom = ~dir.indexOf('bottom') && 'bottom';

		var key = normalizeSpace(prefix + (top || bottom || '') + ' ' + (left || right || ''));
		return directions[key] || 0;
	}

	/**
	 * Tries to find keyword for given direction, expressed in degrees
	 * @param  {Number} dir Direction (degrees)
	 * @param {Boolean} oldStyle Use old style keywords (e.g. "top" instead of "to bottom")
	 * @return {String}     Keyword or <code>Ndeg</code> expression
	 */
	function stringifyDirection(dir, oldStyle) {
		var reNewStyle = /^to\s/;
		var keys = _.filter(_.keys(directions), function(k) {
			var hasPrefix = reNewStyle.test(k);
			return oldStyle ? !hasPrefix : hasPrefix;
		});

		for (var i = 0; i < keys.length; i++) {
			if (directions[keys[i]] == dir) {
				return keys[i];
			}
		}

		if (oldStyle) {
			dir = (dir + 270) % 360;
		}

		return dir + 'deg';
	}

	/**
	 * Creates direction definition for old Webkit gradients
	 * @param {String} direction
	 * @returns {String}
	 */
	function oldWebkitDirection(dir) {
		dir = stringifyDirection(dir, true);
		
		if(reDeg.test(dir)) {
			throw "The direction is an angle that can’t be converted.";
		}
		
		var v = function(pos) {
			return ~dir.indexOf(pos) ? '100%' : '0';
		};
		
		return v('left') + ' ' + v('top') + ', ' + v('right') + ' ' + v('bottom');
	}

	return {
		/**
		 * Parses gradient definition into an object.
		 * This object can be used to transform gradient into various
		 * forms
		 * @param  {String} gradient Gradient definition
		 * @return {LinearGradient}
		 */
		parse: function(gradient) {
			// cut out all redundant data
			if (this.isLinearGradient(gradient)) {
				gradient = gradient.replace(/^\s*[\-a-z]+\s*\(|\)\s*$/ig, '');
			} else {
				throw 'Invalid linear gradient definition:\n' + gradient;
			}

			return new LinearGradient(gradient);
		},

		/**
		 * Check if given string can be parsed as linear gradient
		 * @param  {String}  str
		 * @return {Boolean}
		 */
		isLinearGradient: function(str) {
			return reLinearGradient.test(str);
		},

		resolveDirection: resolveDirection,
		stringifyDirection: stringifyDirection
	};
});
/**
 * 'Expand Abbreviation' handler that parses gradient definition from under 
 * cursor and updates CSS rule with vendor-prefixed values.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('resolver/cssGradient',['require','exports','module','lodash','../assets/preferences','../assets/resources','../utils/common','../assets/stringStream','./css','../assets/range','../editTree/css','../utils/editor','./gradient/linear'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('../assets/preferences');
	var resources = require('../assets/resources');
	var utils = require('../utils/common');
	var stringStream = require('../assets/stringStream');
	var cssResolver = require('./css');
	var range = require('../assets/range');
	var cssEditTree = require('../editTree/css');
	var editorUtils = require('../utils/editor');
	var linearGradient = require('./gradient/linear');

	var cssSyntaxes = ['css', 'less', 'sass', 'scss', 'stylus', 'styl'];
	
	// XXX define preferences
	prefs.define('css.gradient.prefixes', 'webkit, moz, o',
			'A comma-separated list of vendor-prefixes for which values should ' 
			+ 'be generated.');
	
	prefs.define('css.gradient.oldWebkit', false,
			'Generate gradient definition for old Webkit implementations');
	
	prefs.define('css.gradient.omitDefaultDirection', true,
		'Do not output default direction definition in generated gradients.');
	
	prefs.define('css.gradient.defaultProperty', 'background-image',
		'When gradient expanded outside CSS value context, it will produce '
			+ 'properties with this name.');
	
	prefs.define('css.gradient.fallback', false,
			'With this option enabled, CSS gradient generator will produce '
			+ '<code>background-color</code> property with gradient first color '
			+ 'as fallback for old browsers.');

	/**
	 * Resolves property name (abbreviation): searches for snippet definition in 
	 * 'resources' and returns new name of matched property
	 */
	function resolvePropertyName(name, syntax) {
		var snippet = resources.findSnippet(syntax, name);
		
		if (!snippet && prefs.get('css.fuzzySearch')) {
			var minScore = parseFloat(prefs.get('css.fuzzySearchMinScore'));
			snippet = resources.fuzzyFindSnippet(syntax, name, minScore);
		}
		
		if (snippet) {
			if (!_.isString(snippet)) {
				snippet = snippet.data;
			}
			
			return cssResolver.splitSnippet(snippet).name;
		}
	}

	/**
	 * Returns vendor prefixes for given gradient type
	 * @param {String} type Gradient type (currently, 'linear-gradient' 
	 * is the only supported value)
	 * @return {Array}
	 */
	function getGradientPrefixes(type) {
		var prefixes = cssResolver.vendorPrefixes(type);
		if (!prefixes) {
			// disabled Can I Use, fallback to property list
			prefixes = prefs.getArray('css.gradient.prefixes');
		}

		return prefixes;
	}
	
	function getPrefixedNames(type) {
		var prefixes = getGradientPrefixes(type);
		var names = prefixes 
			? _.map(prefixes, function(p) {
				return '-' + p + '-' + type;
			}) 
			: [];
		
		names.push(type);
		
		return names;
	}
	
	/**
	 * Returns list of CSS properties with gradient
	 * @param {Array} gradient List of gradient objects
	 * @param {CSSEditElement} property Original CSS property
	 * @returns {Array}
	 */
	function getPropertiesForGradient(gradients, property) {
		var props = [];
		var propertyName = property.name();
		var omitDir = prefs.get('css.gradient.omitDefaultDirection');
		
		if (prefs.get('css.gradient.fallback') && ~propertyName.toLowerCase().indexOf('background')) {
			props.push({
				name: 'background-color',
				value: '${1:' + gradients[0].gradient.colorStops[0].color + '}'
			});
		}
		
		var value = property.value();
		_.each(getGradientPrefixes('linear-gradient'), function(prefix) {
			var name = cssResolver.prefixed(propertyName, prefix);
			if (prefix == 'webkit' && prefs.get('css.gradient.oldWebkit')) {
				try {
					props.push({
						name: name,
						value: insertGradientsIntoCSSValue(gradients, value, {
							prefix: prefix, 
							oldWebkit: true,
							omitDefaultDirection: omitDir
						})
					});
				} catch(e) {}
			}
			
			props.push({
				name: name,
				value: insertGradientsIntoCSSValue(gradients, value, {
					prefix: prefix,
					omitDefaultDirection: omitDir
				})
			});
		});
		
		return props.sort(function(a, b) {
			return b.name.length - a.name.length;
		});
	}

	/**
	 * Replaces old gradient definitions in given CSS property value
	 * with new ones, preserving original formatting
	 * @param  {Array} gradients List of CSS gradients
	 * @param  {String} value     Original CSS value
	 * @param  {Object} options   Options for gradient’s stringify() method
	 * @return {String}
	 */
	function insertGradientsIntoCSSValue(gradients, value, options) {
		// gradients *should* passed in order they actually appear in CSS property
		// iterate over it in backward direction to preserve gradient locations
		options = options || {};
		gradients = _.clone(gradients)
		_.each(gradients.reverse(), function(item, i) {
			var suffix = !i && options.placeholder ? options.placeholder : '';
			var str = options.oldWebkit ? item.gradient.stringifyOldWebkit(options) : item.gradient.stringify(options);
			value = utils.replaceSubstring(value, str + suffix, item.matchedPart);
		});

		return value;
	}

	/**
	 * Returns list of properties with the same meaning 
	 * (e.g. vendor-prefixed + original name)
	 * @param  {String} property CSS property name
	 * @return {Array}
	 */
	function similarPropertyNames(property) {
		if (!_.isString(property)) {
			property = property.name();
		}

		var similarProps = _.map(cssResolver.vendorPrefixes(property) || [], function(prefix) {
			return '-' + prefix + '-' + property;
		});
		similarProps.push(property);
		return similarProps;
	}
	
	/**
	 * Pastes gradient definition into CSS rule with correct vendor-prefixes
	 * @param {EditElement} property Matched CSS property
	 * @param {Array} gradients List of gradients to insert
	 */
	function pasteGradient(property, gradients) {
		var rule = property.parent;
		var alignVendor = prefs.get('css.alignVendor');
		var omitDir = prefs.get('css.gradient.omitDefaultDirection');
		
		// we may have aligned gradient definitions: find the smallest value
		// separator
		var sep = property.styleSeparator;
		var before = property.styleBefore;
		
		// first, remove all properties within CSS rule with the same name and
		// gradient definition
		_.each(rule.getAll(similarPropertyNames(property)), function(item) {
			if (item != property && /gradient/i.test(item.value())) {
				if (item.styleSeparator.length < sep.length) {
					sep = item.styleSeparator;
				}
				if (item.styleBefore.length < before.length) {
					before = item.styleBefore;
				}
				rule.remove(item);
			}
		});
		
		if (alignVendor) {
			// update prefix
			if (before != property.styleBefore) {
				var fullRange = property.fullRange();
				rule._updateSource(before, fullRange.start, fullRange.start + property.styleBefore.length);
				property.styleBefore = before;
			}
			
			// update separator value
			if (sep != property.styleSeparator) {
				rule._updateSource(sep, property.nameRange().end, property.valueRange().start);
				property.styleSeparator = sep;
			}
		}
		
		var value = property.value();

		// create list of properties to insert
		var propsToInsert = getPropertiesForGradient(gradients, property);
		
		// align prefixed values
		if (alignVendor) {
			var values = _.pluck(propsToInsert, 'value');
			var names = _.pluck(propsToInsert, 'name');
			values.push(property.value());
			names.push(property.name());
			
			var valuePads = utils.getStringsPads(_.map(values, function(v) {
				return v.substring(0, v.indexOf('('));
			}));
			
			var namePads = utils.getStringsPads(names);
			property.name(_.last(namePads) + property.name());
			
			_.each(propsToInsert, function(prop, i) {
				prop.name = namePads[i] + prop.name;
				prop.value = valuePads[i] + prop.value;
			});
			
			property.value(_.last(valuePads) + property.value());
		}
		
		// put vendor-prefixed definitions before current rule
		_.each(propsToInsert, function(prop) {
			rule.add(prop.name, prop.value, rule.indexOf(property));
		});

		// put vanilla-clean gradient definition into current rule
		property.value(insertGradientsIntoCSSValue(gradients, value, {
			placeholder: '${2}',
			omitDefaultDirection: omitDir
		}));
	}

	/**
	 * Validates caret position relatively to located gradients
	 * in CSS rule. In other words, it checks if it’s safe to 
	 * expand gradients for current caret position or not.
	 * 
	 * See issue https://github.com/sergeche/emmet-sublime/issues/411
	 * 
	 * @param  {Array} gradients List of parsed gradients
	 * @param  {Number} caretPos  Current caret position
	 * @param  {String} syntax    Current document syntax
	 * @return {Boolean}
	 */
	function isValidCaretPosition(gradients, caretPos, syntax) {
		syntax = syntax || 'css';
		if (syntax == 'css' || syntax == 'less' || syntax == 'scss') {
			return true;
		}

		var offset = gradients.property.valueRange(true).start;
		var parts = gradients.gradients;

		// in case of preprocessors where properties are separated with
		// newlines, make sure there’s no gradient definition past
		// current caret position. 
		for (var i = parts.length - 1; i >= 0; i--) {
			if (parts[i].matchedPart.start + offset >= caretPos) {
				return false;
			}
		}

		return true;
	}
	
	module = module || {};
	return module.exports = {
		/**
		 * Search for gradient definitions inside CSS property value
		 * @returns {Array} Array of matched gradients
		 */
		findGradients: function(cssProp) {
			var value = cssProp.value();
			var gradients = [];
			var that = this;
			_.each(cssProp.valueParts(), function(part) {
				var partValue = part.substring(value);
				if (linearGradient.isLinearGradient(partValue)) {
					var gradient = linearGradient.parse(partValue);
					if (gradient) {
						gradients.push({
							gradient: gradient,
							matchedPart: part
						});
					}
				}
			});
			
			return gradients.length ? gradients : null;
		},

		/**
		 * Returns list of gradients found in CSS property
		 * of given CSS code in specified (caret) position
		 * @param  {String} css CSS code snippet
		 * @param  {Number} pos Character index where to start searching for CSS property
		 * @return {Array}
		 */
		gradientsFromCSSProperty: function(css, pos) {
			var cssProp = cssEditTree.propertyFromPosition(css, pos);
			if (cssProp) {
				var grd = this.findGradients(cssProp);
				if (grd) {
					return {
						property: cssProp,
						gradients: grd
					};
				}
			}

			return null;
		},

		/**
		 * Handler for “Expand Abbreviation” action
		 * @param  {IEmmetEditor} editor
		 * @param  {String} syntax
		 * @param  {String} profile
		 * return {Boolean}
		 */
		expandAbbreviationHandler: function(editor, syntax, profile) {
			var info = editorUtils.outputInfo(editor, syntax, profile);
			if (!_.include(cssSyntaxes, info.syntax)) {
				return false;
			}
			
			// let's see if we are expanding gradient definition
			var caret = editor.getCaretPos();
			var content = info.content;
			var gradients = this.gradientsFromCSSProperty(content, caret);
			if (gradients) {
				if (!isValidCaretPosition(gradients, caret, info.syntax)) {
					return false;
				}

				var cssProperty = gradients.property;
				var cssRule = cssProperty.parent;
				var ruleStart = cssRule.options.offset || 0;
				var ruleEnd = ruleStart + cssRule.toString().length;
				
				// Handle special case:
				// user wrote gradient definition between existing CSS 
				// properties and did not finished it with semicolon.
				// In this case, we have semicolon right after gradient 
				// definition and re-parse rule again
				if (/[\n\r]/.test(cssProperty.value())) {
					// insert semicolon at the end of gradient definition
					var insertPos = cssProperty.valueRange(true).start + _.last(gradients.gradients).matchedPart.end;
					content = utils.replaceSubstring(content, ';', insertPos);
					
					var _gradients = this.gradientsFromCSSProperty(content, caret);
					if (_gradients) {
						gradients = _gradients;
						cssProperty = gradients.property;
						cssRule = cssProperty.parent;
					}
				}
				
				// make sure current property has terminating semicolon
				cssProperty.end(';');
				
				// resolve CSS property name
				var resolvedName = resolvePropertyName(cssProperty.name(), syntax);
				if (resolvedName) {
					cssProperty.name(resolvedName);
				}
				
				pasteGradient(cssProperty, gradients.gradients);
				editor.replaceContent(cssRule.toString(), ruleStart, ruleEnd, true);
				return true;
			}
			
			return this.expandGradientOutsideValue(editor, syntax);
		},

		/**
		 * Tries to expand gradient outside CSS value 
		 * @param {IEmmetEditor} editor
		 * @param {String} syntax
		 */
		expandGradientOutsideValue: function(editor, syntax) {
			var propertyName = prefs.get('css.gradient.defaultProperty');
			var omitDir = prefs.get('css.gradient.omitDefaultDirection');
			
			if (!propertyName) {
				return false;
			}
			
			// assuming that gradient definition is written on new line,
			// do a simplified parsing
			var content = String(editor.getContent());
			/** @type Range */
			var lineRange = range.create(editor.getCurrentLineRange());
			
			// get line content and adjust range with padding
			var line = lineRange.substring(content)
				.replace(/^\s+/, function(pad) {
					lineRange.start += pad.length;
					return '';
				})
				.replace(/\s+$/, function(pad) {
					lineRange.end -= pad.length;
					return '';
				});

			// trick parser: make it think that we’re parsing actual CSS property
			var fakeCSS = 'a{' + propertyName + ': ' + line + ';}';
			var gradients = this.gradientsFromCSSProperty(fakeCSS, fakeCSS.length - 2);
			if (gradients) {
				var props = getPropertiesForGradient(gradients.gradients, gradients.property);
				props.push({
					name: gradients.property.name(),
					value: insertGradientsIntoCSSValue(gradients.gradients, gradients.property.value(), {
						placeholder: '${2}',
						omitDefaultDirection: omitDir
					})
				});
				
				var sep = cssResolver.getSyntaxPreference('valueSeparator', syntax);
				var end = cssResolver.getSyntaxPreference('propertyEnd', syntax);
				
				if (prefs.get('css.alignVendor')) {
					var pads = utils.getStringsPads(_.map(props, function(prop) {
						return prop.value.substring(0, prop.value.indexOf('('));
					}));
					_.each(props, function(prop, i) {
						prop.value = pads[i] + prop.value;
					});
				}
				
				props = _.map(props, function(item) {
					return item.name + sep + item.value + end;
				});
				
				editor.replaceContent(props.join('\n'), lineRange.start, lineRange.end);
				return true;
			}
			
			return false;
		},

		/**
		 * Handler for “Reflect CSS Value“ action
		 * @param  {String} property
		 */
		reflectValueHandler: function(property) {
			var omitDir = prefs.get('css.gradient.omitDefaultDirection');
			var gradients = this.findGradients(property);
			if (!gradients) {
				return false;
			}
			
			var that = this;
			var value = property.value();
			
			// reflect value for properties with the same name
			_.each(property.parent.getAll(similarPropertyNames(property)), function(prop) {
				if (prop === property) {
					return;
				}

				// make sure current property contains gradient definition,
				// otherwise – skip it
				var localGradients = that.findGradients(prop);
				if (localGradients) {
					// detect vendor prefix for current property
					var localValue = prop.value();
					var dfn = localGradients[0].matchedPart.substring(localValue);
					var prefix = '';
					if (/^\s*\-([a-z]+)\-/.test(dfn)) {
						prefix = RegExp.$1;
					}

					prop.value(insertGradientsIntoCSSValue(gradients, value, {
						prefix: prefix,
						omitDefaultDirection: omitDir
					}));
				}
			});
			
			return true;
		}
	};
});
/**
 * 'Expand abbreviation' editor action: extracts abbreviation from current caret 
 * position and replaces it with formatted output. 
 * <br><br>
 * This behavior can be overridden with custom handlers which can perform 
 * different actions when 'Expand Abbreviation' action is called.
 * For example, a CSS gradient handler that produces vendor-prefixed gradient
 * definitions registers its own expand abbreviation handler.  
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/expandAbbreviation',['require','exports','module','lodash','../assets/handlerList','../assets/range','../assets/preferences','../utils/common','../utils/editor','../utils/action','../resolver/cssGradient','../parser/abbreviation'],function(require, exports, module) {
	var _ = require('lodash');
	var handlerList = require('../assets/handlerList');
	var range = require('../assets/range');
	var prefs = require('../assets/preferences');
	var utils = require('../utils/common');
	var editorUtils = require('../utils/editor');
	var actionUtils = require('../utils/action');
	var cssGradient = require('../resolver/cssGradient');
	var parser = require('../parser/abbreviation');

	/**
	 * Search for abbreviation in editor from current caret position
	 * @param {IEmmetEditor} editor Editor instance
	 * @return {String}
	 */
	function findAbbreviation(editor) {
		var r = range(editor.getSelectionRange());
		var content = String(editor.getContent());
		if (r.length()) {
			// abbreviation is selected by user
			return r.substring(content);
		}
		
		// search for new abbreviation from current caret position
		var curLine = editor.getCurrentLineRange();
		return actionUtils.extractAbbreviation(content.substring(curLine.start, r.start));
	}

	/**
	 * @type HandlerList List of registered handlers
	 */
	var handlers = handlerList.create();

	// XXX setup default expand handlers
	
	/**
	 * Extracts abbreviation from current caret 
	 * position and replaces it with formatted output 
	 * @param {IEmmetEditor} editor Editor instance
	 * @param {String} syntax Syntax type (html, css, etc.)
	 * @param {String} profile Output profile name (html, xml, xhtml)
	 * @return {Boolean} Returns <code>true</code> if abbreviation was expanded 
	 * successfully
	 */
	handlers.add(function(editor, syntax, profile) {
		var caretPos = editor.getSelectionRange().end;
		var abbr = findAbbreviation(editor);
			
		if (abbr) {
			var content = parser.expand(abbr, {
				syntax: syntax, 
				profile: profile, 
				contextNode: actionUtils.captureContext(editor)
			});

			if (content) {
				var replaceFrom = caretPos - abbr.length;
				var replaceTo = caretPos;

				// a special case for CSS: if editor already contains
				// semicolon right after current caret position — replace it too
				var cssSyntaxes = prefs.getArray('css.syntaxes');
				if (_.include(cssSyntaxes, syntax)) {
					var curContent = editor.getContent();
					if (curContent.charAt(caretPos) == ';' && content.charAt(content.length - 1) == ';') {
						replaceTo++;
					}
				}

				editor.replaceContent(content, replaceFrom, replaceTo);
				return true;
			}
		}
		
		return false;
	}, {order: -1});
	handlers.add(_.bind(cssGradient.expandAbbreviationHandler, cssGradient));
		
	return {
		/**
		 * The actual “Expand Abbreviation“ action routine
		 * @param  {IEmmetEditor} editor  Editor instance
		 * @param  {String} syntax  Current document syntax
		 * @param  {String} profile Output profile name
		 * @return {Boolean}
		 */
		expandAbbreviationAction: function(editor, syntax, profile) {
			var args = _.toArray(arguments);
			
			// normalize incoming arguments
			var info = editorUtils.outputInfo(editor, syntax, profile);
			args[1] = info.syntax;
			args[2] = info.profile;
			
			return handlers.exec(false, args);
		},

		/**
		 * A special case of “Expand Abbreviation“ action, invoked by Tab key.
		 * In this case if abbreviation wasn’t expanded successfully or there’s a selecetion, 
		 * the current line/selection will be indented. 
		 * @param  {IEmmetEditor} editor  Editor instance
		 * @param  {String} syntax  Current document syntax
		 * @param  {String} profile Output profile name
		 * @return {Boolean}
		 */
		expandAbbreviationWithTabAction: function(editor, syntax, profile) {
			var sel = editor.getSelection();
			var indent = '\t';

			// if something is selected in editor,
			// we should indent the selected content
			if (sel) {
				var selRange = range(editor.getSelectionRange());
				var content = utils.padString(sel, indent);
				
				editor.replaceContent(indent + '${0}', editor.getCaretPos());
				var replaceRange = range(editor.getCaretPos(), selRange.length());
				editor.replaceContent(content, replaceRange.start, replaceRange.end, true);
				editor.createSelection(replaceRange.start, replaceRange.start + content.length);
				return true;
			}
	
			// nothing selected, try to expand
			if (!this.expandAbbreviationAction(editor, syntax, profile)) {
				editor.replaceContent(indent, editor.getCaretPos());
			}
			
			return true;
		},

		
		_defaultHandler: function(editor, syntax, profile) {
			var caretPos = editor.getSelectionRange().end;
			var abbr = this.findAbbreviation(editor);
				
			if (abbr) {
				var ctx = actionUtils.captureContext(editor);
				var content = parser.expand(abbr, syntax, profile, ctx);
				if (content) {
					editor.replaceContent(content, caretPos - abbr.length, caretPos);
					return true;
				}
			}
			
			return false;
		},

		/**
		 * Adds custom expand abbreviation handler. The passed function should 
		 * return <code>true</code> if it was performed successfully, 
		 * <code>false</code> otherwise.
		 * 
		 * Added handlers will be called when 'Expand Abbreviation' is called
		 * in order they were added
		 * @memberOf expandAbbreviation
		 * @param {Function} fn
		 * @param {Object} options
		 */
		addHandler: function(fn, options) {
			handlers.add(fn, options);
		},
		
		/**
		 * Removes registered handler
		 * @returns
		 */
		removeHandler: function(fn) {
			handlers.remove(fn);
		},
		
		findAbbreviation: findAbbreviation
	};
});
/**
 * Increment/decrement number under cursor
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/incrementDecrement',['require','exports','module','lodash','../utils/common','../utils/action'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');
	var actionUtils = require('../utils/action');

	/**
	 * Returns length of integer part of number
	 * @param {String} num
	 */
	function intLength(num) {
		num = num.replace(/^\-/, '');
		if (~num.indexOf('.')) {
			return num.split('.')[0].length;
		}
		
		return num.length;
	}

	return {
		increment01Action: function(editor) {
			return this.incrementNumber(editor, .1);
		},

		increment1Action: function(editor) {
			return this.incrementNumber(editor, 1);
		},

		increment10Action: function(editor) {
			return this.incrementNumber(editor, 10);
		},

		decrement01Action: function(editor) {
			return this.incrementNumber(editor, -.1);
		},

		decrement1Action: function(editor) {
			return this.incrementNumber(editor, -1);
		},

		decrement10Action: function(editor) {
			return this.incrementNumber(editor, -10);
		},

		/**
		 * Default method to increment/decrement number under
		 * caret with given step
		 * @param  {IEmmetEditor} editor
		 * @param  {Number} step
		 * @return {Boolean}
		 */
		incrementNumber: function(editor, step) {
			var hasSign = false;
			var hasDecimal = false;
				
			var r = actionUtils.findExpressionBounds(editor, function(ch, pos, content) {
				if (utils.isNumeric(ch))
					return true;
				if (ch == '.') {
					// make sure that next character is numeric too
					if (!utils.isNumeric(content.charAt(pos + 1)))
						return false;
					
					return hasDecimal ? false : hasDecimal = true;
				}
				if (ch == '-')
					return hasSign ? false : hasSign = true;
					
				return false;
			});
				
			if (r && r.length()) {
				var strNum = r.substring(String(editor.getContent()));
				var num = parseFloat(strNum);
				if (!_.isNaN(num)) {
					num = utils.prettifyNumber(num + step);
					
					// do we have zero-padded number?
					if (/^(\-?)0+[1-9]/.test(strNum)) {
						var minus = '';
						if (RegExp.$1) {
							minus = '-';
							num = num.substring(1);
						}
							
						var parts = num.split('.');
						parts[0] = utils.zeroPadString(parts[0], intLength(strNum));
						num = minus + parts.join('.');
					}
					
					editor.replaceContent(num, r.start, r.end);
					editor.createSelection(r.start, r.start + num.length);
					return true;
				}
			}
			
			return false;
		}
	};
});
/**
 * Actions to insert line breaks. Some simple editors (like browser's 
 * &lt;textarea&gt;, for example) do not provide such simple things
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/lineBreaks',['require','exports','module','lodash','../assets/preferences','../utils/common','../assets/resources','../assets/htmlMatcher','../utils/editor'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('../assets/preferences');
	var utils = require('../utils/common');
	var resources = require('../assets/resources');
	var htmlMatcher = require('../assets/htmlMatcher');
	var editorUtils = require('../utils/editor');

	// setup default preferences
	prefs.define('css.closeBraceIndentation', '\n',
			'Indentation before closing brace of CSS rule. Some users prefere ' 
			+ 'indented closing brace of CSS rule for better readability. '
			+ 'This preference’s value will be automatically inserted before '
			+ 'closing brace when user adds newline in newly created CSS rule '
			+ '(e.g. when “Insert formatted linebreak” action will be performed ' 
			+ 'in CSS file). If you’re such user, you may want to write put a value ' 
			+ 'like <code>\\n\\t</code> in this preference.');

	return {
		/**
		 * Inserts newline character with proper indentation. This action is used in
		 * editors that doesn't have indentation control (like textarea element) to 
		 * provide proper indentation for inserted newlines
		 * @param {IEmmetEditor} editor Editor instance
		 */
		insertLineBreakAction: function(editor) {
			if (!this.insertLineBreakOnlyAction(editor)) {
				var curPadding = editorUtils.getCurrentLinePadding(editor);
				var content = String(editor.getContent());
				var caretPos = editor.getCaretPos();
				var len = content.length;
				var nl = '\n';
					
				// check out next line padding
				var lineRange = editor.getCurrentLineRange();
				var nextPadding = '';
					
				for (var i = lineRange.end + 1, ch; i < len; i++) {
					ch = content.charAt(i);
					if (ch == ' ' || ch == '\t')
						nextPadding += ch;
					else
						break;
				}
				
				if (nextPadding.length > curPadding.length) {
					editor.replaceContent(nl + nextPadding, caretPos, caretPos, true);
				} else {
					editor.replaceContent(nl, caretPos);
				}
			}
			
			return true;
		},

		/**
		 * Inserts newline character with proper indentation in specific positions only.
		 * @param {IEmmetEditor} editor
		 * @return {Boolean} Returns <code>true</code> if line break was inserted 
		 */
		insertLineBreakOnlyAction: function(editor) {
			var info = editorUtils.outputInfo(editor);
			var caretPos = editor.getCaretPos();
			var nl = '\n';
			var pad = '\t';
			
			if (_.include(['html', 'xml', 'xsl'], info.syntax)) {
				// let's see if we're breaking newly created tag
				var tag = htmlMatcher.tag(info.content, caretPos);
				if (tag && !tag.innerRange.length()) {
					editor.replaceContent(nl + pad + utils.getCaretPlaceholder() + nl, caretPos);
					return true;
				}
			} else if (info.syntax == 'css') {
				/** @type String */
				var content = info.content;
				if (caretPos && content.charAt(caretPos - 1) == '{') {
					var append = prefs.get('css.closeBraceIndentation');
					
					var hasCloseBrace = content.charAt(caretPos) == '}';
					if (!hasCloseBrace) {
						// do we really need special formatting here?
						// check if this is really a newly created rule,
						// look ahead for a closing brace
						for (var i = caretPos, il = content.length, ch; i < il; i++) {
							ch = content.charAt(i);
							if (ch == '{') {
								// ok, this is a new rule without closing brace
								break;
							}
							
							if (ch == '}') {
								// not a new rule, just add indentation
								append = '';
								hasCloseBrace = true;
								break;
							}
						}
					}
					
					if (!hasCloseBrace) {
						append += '}';
					}
					
					// defining rule set
					var insValue = nl + pad + utils.getCaretPlaceholder() + append;
					editor.replaceContent(insValue, caretPos);
					return true;
				}
			}
				
			return false;
		}
	};
});
/**
 * HTML pair matching (balancing) actions
 * @constructor
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/balance',['require','exports','module','lodash','../assets/htmlMatcher','../utils/common','../utils/editor','../utils/action','../assets/range','../editTree/css','../utils/cssSections'],function(require, exports, module) {
	var _ = require('lodash');
	var htmlMatcher = require('../assets/htmlMatcher');
	var utils = require('../utils/common');
	var editorUtils = require('../utils/editor');
	var actionUtils = require('../utils/action');
	var range = require('../assets/range');
	var cssEditTree = require('../editTree/css');
	var cssSections = require('../utils/cssSections');
	var lastMatch = null;

	function balanceHTML(editor, direction) {
		var info = editorUtils.outputInfo(editor);
		var content = info.content;
		var sel = range(editor.getSelectionRange());
		
		// validate previous match
		if (lastMatch && !lastMatch.range.equal(sel)) {
			lastMatch = null;
		}
		
		if (lastMatch && sel.length()) {
			if (direction == 'in') {
				// user has previously selected tag and wants to move inward
				if (lastMatch.type == 'tag' && !lastMatch.close) {
					// unary tag was selected, can't move inward
					return false;
				} else {
					if (lastMatch.range.equal(lastMatch.outerRange)) {
						lastMatch.range = lastMatch.innerRange;
					} else {
						var narrowed = utils.narrowToNonSpace(content, lastMatch.innerRange);
						lastMatch = htmlMatcher.find(content, narrowed.start + 1);
						if (lastMatch && lastMatch.range.equal(sel) && lastMatch.outerRange.equal(sel)) {
							lastMatch.range = lastMatch.innerRange;
						}
					}
				}
			} else {
				if (
					!lastMatch.innerRange.equal(lastMatch.outerRange) 
					&& lastMatch.range.equal(lastMatch.innerRange) 
					&& sel.equal(lastMatch.range)) {
					lastMatch.range = lastMatch.outerRange;
				} else {
					lastMatch = htmlMatcher.find(content, sel.start);
					if (lastMatch && lastMatch.range.equal(sel) && lastMatch.innerRange.equal(sel)) {
						lastMatch.range = lastMatch.outerRange;
					}
				}
			}
		} else {
			lastMatch = htmlMatcher.find(content, sel.start);
		}

		if (lastMatch) {
			if (lastMatch.innerRange.equal(sel)) {
				lastMatch.range = lastMatch.outerRange;
			}

			if (!lastMatch.range.equal(sel)) {
				editor.createSelection(lastMatch.range.start, lastMatch.range.end);
				return true;
			}
		}
		
		lastMatch = null;
		return false;
	}

	function rangesForCSSRule(rule, pos) {
		// find all possible ranges
		var ranges = [rule.range(true)];

		// braces content
		ranges.push(rule.valueRange(true));

		// find nested sections
		var nestedSections = cssSections.nestedSectionsInRule(rule);

		// real content, e.g. from first property name to
		// last property value
		var items = rule.list();
		if (items.length || nestedSections.length) {
			var start = Number.POSITIVE_INFINITY, end = -1;
			if (items.length) {
				start = items[0].namePosition(true);
				end = _.last(items).range(true).end;
			}

			if (nestedSections.length) {
				if (nestedSections[0].start < start) {
					start = nestedSections[0].start;
				}

				if (_.last(nestedSections).end > end) {
					end = _.last(nestedSections).end;
				}
			}

			ranges.push(range.create2(start, end));
		}

		ranges = ranges.concat(nestedSections);

		var prop = cssEditTree.propertyFromPosition(rule, pos) || items[0];
		if (prop) {
			ranges.push(prop.range(true));
			var valueRange = prop.valueRange(true);
			if (!prop.end()) {
				valueRange._unterminated = true;
			}
			ranges.push(valueRange);
		}

		return ranges;
	}

	/**
	 * Returns all possible selection ranges for given caret position
	 * @param  {String} content CSS content
	 * @param  {Number} pos     Caret position(where to start searching)
	 * @return {Array}
	 */
	function getCSSRanges(content, pos) {
		var rule;
		if (_.isString(content)) {
			var ruleRange = cssSections.matchEnclosingRule(content, pos);
			if (ruleRange) {
				rule = cssEditTree.parse(ruleRange.substring(content), {
					offset: ruleRange.start
				});
			}
		} else {
			// passed parsed CSS rule
			rule = content;
		}

		if (!rule) {
			return null;
		}

		// find all possible ranges
		var ranges = rangesForCSSRule(rule, pos);

		// remove empty ranges
		ranges = _.filter(ranges, function(item) {
			return !!item.length;
		});

		return _.uniq(ranges, function(item) {
			return item.valueOf();
		});
	}

	function balanceCSS(editor, direction) {
		var info = editorUtils.outputInfo(editor);
		var content = info.content;
		var sel = range(editor.getSelectionRange());

		var ranges = getCSSRanges(info.content, sel.start);
		if (!ranges && sel.length()) {
			// possible reason: user has already selected
			// CSS rule from last match
			try {
				var rule = cssEditTree.parse(sel.substring(info.content), {
					offset: sel.start
				});
				ranges = getCSSRanges(rule, sel.start);
			} catch(e) {}
		}

		if (!ranges) {
			return false;
		}

		ranges = range.sort(ranges, true);

		// edge case: find match that equals current selection,
		// in case if user moves inward after selecting full CSS rule
		var bestMatch = _.find(ranges, function(r) {
			return r.equal(sel);
		});

		if (!bestMatch) {
			bestMatch = _.find(ranges, function(r) {
				// Check for edge case: caret right after CSS value
				// but it doesn‘t contains terminating semicolon.
				// In this case we have to check full value range
				return r._unterminated ? r.include(sel.start) : r.inside(sel.start);
			});
		}

		if (!bestMatch) {
			return false;
		}

		// if best match equals to current selection, move index
		// one position up or down, depending on direction
		var bestMatchIx = _.indexOf(ranges, bestMatch);
		if (bestMatch.equal(sel)) {
			bestMatchIx += direction == 'out' ? 1 : -1;
		}

		if (bestMatchIx < 0 || bestMatchIx >= ranges.length) {
			if (bestMatchIx >= ranges.length && direction == 'out') {
				pos = bestMatch.start - 1;

				var outerRanges = getCSSRanges(content, pos);
				outerRanges = _.filter(outerRanges, function(r) {
					return r.inside(pos);
				});

				bestMatch = _.last(outerRanges);
			} else if (bestMatchIx < 0 && direction == 'in') {
				bestMatch = null;
			} else {
				bestMatch = null;
			}
		} else {
			bestMatch = ranges[bestMatchIx];	
		}

		if (bestMatch) {
			editor.createSelection(bestMatch.start, bestMatch.end);
			return true;
		}
		
		return false;
	}
	
	return {
		/**
		 * Find and select HTML tag pair
		 * @param {IEmmetEditor} editor Editor instance
		 * @param {String} direction Direction of pair matching: 'in' or 'out'. 
		 * Default is 'out'
		 */
		balance: function(editor, direction) {
			direction = String((direction || 'out').toLowerCase());
			var info = editorUtils.outputInfo(editor);
			if (actionUtils.isSupportedCSS(info.syntax)) {
				return balanceCSS(editor, direction);
			}
			
			return balanceHTML(editor, direction);
		},

		balanceInwardAction: function(editor) {
			return this.balance(editor, 'in');
		},

		balanceOutwardAction: function(editor) {
			return this.balance(editor, 'out');	
		},

		/**
		 * Moves caret to matching opening or closing tag
		 * @param {IEmmetEditor} editor
		 */
		goToMatchingPairAction: function(editor) {
			var content = String(editor.getContent());
			var caretPos = editor.getCaretPos();
			
			if (content.charAt(caretPos) == '<') 
				// looks like caret is outside of tag pair  
				caretPos++;
				
			var tag = htmlMatcher.tag(content, caretPos);
			if (tag && tag.close) { // exclude unary tags
				if (tag.open.range.inside(caretPos)) {
					editor.setCaretPos(tag.close.range.start);
				} else {
					editor.setCaretPos(tag.open.range.start);
				}
				
				return true;
			}
			
			return false;
		}
	};
});
/**
 * Merges selected lines or lines between XHTML tag pairs
 * @param {Function} require
 * @param {Underscore} _
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/mergeLines',['require','exports','module','../assets/htmlMatcher','../utils/common','../utils/editor','../assets/range'],function(require, exports, module) {
	var htmlMatcher = require('../assets/htmlMatcher');
	var utils = require('../utils/common');
	var editorUtils = require('../utils/editor');
	var range = require('../assets/range');

	return {
		mergeLinesAction: function(editor) {
			var info = editorUtils.outputInfo(editor);
		
			var selection = range(editor.getSelectionRange());
			if (!selection.length()) {
				// find matching tag
				var pair = htmlMatcher.find(info.content, editor.getCaretPos());
				if (pair) {
					selection = pair.outerRange;
				}
			}
			
			if (selection.length()) {
				// got range, merge lines
				var text =  selection.substring(info.content);
				var lines = utils.splitByLines(text);
				
				for (var i = 1; i < lines.length; i++) {
					lines[i] = lines[i].replace(/^\s+/, '');
				}
				
				text = lines.join('').replace(/\s{2,}/, ' ');
				var textLen = text.length;
				text = utils.escapeText(text);
				editor.replaceContent(text, selection.start, selection.end);
				editor.createSelection(selection.start, selection.start + textLen);
				
				return true;
			}
			
			return false;
		}
	};
});
/**
 * Reflect CSS value: takes rule's value under caret and pastes it for the same 
 * rules with vendor prefixes
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/reflectCSSValue',['require','exports','module','lodash','../assets/handlerList','../assets/preferences','../resolver/css','../editTree/css','../utils/common','../utils/action','../utils/editor','../resolver/cssGradient'],function(require, exports, module) {
	var _ = require('lodash');
	var handlerList = require('../assets/handlerList');
	var prefs = require('../assets/preferences');
	var cssResolver = require('../resolver/css');
	var cssEditTree = require('../editTree/css');
	var utils = require('../utils/common');
	var actionUtils = require('../utils/action');
	var editorUtils = require('../utils/editor');
	var cssGradient = require('../resolver/cssGradient');

	prefs.define('css.reflect.oldIEOpacity', false, 'Support IE6/7/8 opacity notation, e.g. <code>filter:alpha(opacity=...)</code>.\
		Note that CSS3 and SVG also provides <code>filter</code> property so this option is disabled by default.')

	/**
	 * @type HandlerList List of registered handlers
	 */
	var handlers = handlerList.create();
	
	function doCSSReflection(editor) {
		var outputInfo = editorUtils.outputInfo(editor);
		var caretPos = editor.getCaretPos();
		
		var cssRule = cssEditTree.parseFromPosition(outputInfo.content, caretPos);
		if (!cssRule) return;
		
		var property = cssRule.itemFromPosition(caretPos, true);
		// no property under cursor, nothing to reflect
		if (!property) return;
		
		var oldRule = cssRule.source;
		var offset = cssRule.options.offset;
		var caretDelta = caretPos - offset - property.range().start;
		
		handlers.exec(false, [property]);
		
		if (oldRule !== cssRule.source) {
			return {
				data:  cssRule.source,
				start: offset,
				end:   offset + oldRule.length,
				caret: offset + property.range().start + caretDelta
			};
		}
	}
	
	/**
	 * Returns regexp that should match reflected CSS property names
	 * @param {String} name Current CSS property name
	 * @return {RegExp}
	 */
	function getReflectedCSSName(name) {
		name = cssEditTree.baseName(name);
		var vendorPrefix = '^(?:\\-\\w+\\-)?', m;
		
		if ((name == 'opacity' || name == 'filter') && prefs.get('css.reflect.oldIEOpacity')) {
			return new RegExp(vendorPrefix + '(?:opacity|filter)$');
		} else if ((m = name.match(/^border-radius-(top|bottom)(left|right)/))) {
			// Mozilla-style border radius
			return new RegExp(vendorPrefix + '(?:' + name + '|border-' + m[1] + '-' + m[2] + '-radius)$');
		} else if ((m = name.match(/^border-(top|bottom)-(left|right)-radius/))) { 
			return new RegExp(vendorPrefix + '(?:' + name + '|border-radius-' + m[1] + m[2] + ')$');
		}
		
		return new RegExp(vendorPrefix + name + '$');
	}

	/**
	 * Reflects inner CSS properites in given value
	 * agains name‘s vendor prefix. In other words, it tries
	 * to modify `transform 0.2s linear` value for `-webkit-transition`
	 * property
	 * @param  {String} name  Reciever CSS property name
	 * @param  {String} value New property value
	 * @return {String}
	 */
	function reflectValueParts(name, value) {
		// detects and updates vendor-specific properties in value,
		// e.g. -webkit-transition: -webkit-transform
		
		var reVendor = /^\-(\w+)\-/;
		var propPrefix = reVendor.test(name) ? RegExp.$1.toLowerCase() : '';
		var parts = cssEditTree.findParts(value);

		parts.reverse();
		_.each(parts, function(part) {
			var partValue = part.substring(value).replace(reVendor, '');
			var prefixes = cssResolver.vendorPrefixes(partValue);
			if (prefixes) {
				// if prefixes are not null then given value can
				// be resolved against Can I Use database and may or
				// may not contain prefixed variant
				if (propPrefix && _.include(prefixes, propPrefix)) {
					partValue = '-' + propPrefix + '-' + partValue;
				}

				value = utils.replaceSubstring(value, partValue, part);
			}
		});

		return value;
	}
	
	/**
	 * Reflects value from <code>donor</code> into <code>receiver</code>
	 * @param {CSSProperty} donor Donor CSS property from which value should
	 * be reflected
	 * @param {CSSProperty} receiver Property that should receive reflected 
	 * value from donor
	 */
	function reflectValue(donor, receiver) {
		var value = getReflectedValue(donor.name(), donor.value(), 
				receiver.name(), receiver.value());
		
		value = reflectValueParts(receiver.name(), value);
		receiver.value(value);
	}
	
	/**
	 * Returns value that should be reflected for <code>refName</code> CSS property
	 * from <code>curName</code> property. This function is used for special cases,
	 * when the same result must be achieved with different properties for different
	 * browsers. For example: opаcity:0.5; → filter:alpha(opacity=50);<br><br>
	 * 
	 * This function does value conversion between different CSS properties
	 * 
	 * @param {String} curName Current CSS property name
	 * @param {String} curValue Current CSS property value
	 * @param {String} refName Receiver CSS property's name 
	 * @param {String} refValue Receiver CSS property's value
	 * @return {String} New value for receiver property
	 */
	function getReflectedValue(curName, curValue, refName, refValue) {
		curName = cssEditTree.baseName(curName);
		refName = cssEditTree.baseName(refName);
		
		if (curName == 'opacity' && refName == 'filter') {
			return refValue.replace(/opacity=[^)]*/i, 'opacity=' + Math.floor(parseFloat(curValue) * 100));
		} else if (curName == 'filter' && refName == 'opacity') {
			var m = curValue.match(/opacity=([^)]*)/i);
			return m ? utils.prettifyNumber(parseInt(m[1], 10) / 100) : refValue;
		}
		
		return curValue;
	}
	
	module = module || {};
	module.exports = {
		reflectCSSValueAction: function(editor) {
			if (editor.getSyntax() != 'css') {
				return false;
			}

			return actionUtils.compoundUpdate(editor, doCSSReflection(editor));
		},

		_defaultHandler: function(property) {
			var reName = getReflectedCSSName(property.name());
			_.each(property.parent.list(), function(p) {
				if (reName.test(p.name())) {
					reflectValue(property, p);
				}
			});
		},

		/**
		 * Adds custom reflect handler. The passed function will receive matched
		 * CSS property (as <code>CSSEditElement</code> object) and should
		 * return <code>true</code> if it was performed successfully (handled 
		 * reflection), <code>false</code> otherwise.
		 * @param {Function} fn
		 * @param {Object} options
		 */
		addHandler: function(fn, options) {
			handlers.add(fn, options);
		},
		
		/**
		 * Removes registered handler
		 * @returns
		 */
		removeHandler: function(fn) {
			handlers.remove(fn);
		}
	};

	// XXX add default handlers
	handlers.add(_.bind(module.exports._defaultHandler, module.exports), {order: -1});
	handlers.add(_.bind(cssGradient.reflectValueHandler, cssGradient));

	return module.exports;
});
/**
 * Gracefully removes tag under cursor
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/removeTag',['require','exports','module','../utils/common','../utils/editor','../assets/htmlMatcher'],function(require, exports, module) {
	var utils = require('../utils/common');
	var editorUtils = require('../utils/editor');
	var htmlMatcher = require('../assets/htmlMatcher');

	return {
		removeTagAction: function(editor) {
			var info = editorUtils.outputInfo(editor);
			
			// search for tag
			var tag = htmlMatcher.tag(info.content, editor.getCaretPos());
			if (tag) {
				if (!tag.close) {
					// simply remove unary tag
					editor.replaceContent(utils.getCaretPlaceholder(), tag.range.start, tag.range.end);
				} else {
					// remove tag and its newlines
					/** @type Range */
					var tagContentRange = utils.narrowToNonSpace(info.content, tag.innerRange);
					/** @type Range */
					var startLineBounds = utils.findNewlineBounds(info.content, tagContentRange.start);
					var startLinePad = utils.getLinePadding(startLineBounds.substring(info.content));
					var tagContent = tagContentRange.substring(info.content);
					
					tagContent = utils.unindentString(tagContent, startLinePad);
					editor.replaceContent(utils.getCaretPlaceholder() + utils.escapeText(tagContent), tag.outerRange.start, tag.outerRange.end);
				}
				
				return true;
			}
			
			return false;
		}
	};
});

/**
 * Actions that use stream parsers and tokenizers for traversing:
 * -- Search for next/previous items in HTML
 * -- Search for next/previous items in CSS
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/selectItem',['require','exports','module','lodash','../assets/range','../utils/editor','../utils/action','../assets/stringStream','../parser/xml','../editTree/css','../utils/cssSections'],function(require, exports, module) {
	var _ = require('lodash');
	var range = require('../assets/range');
	var editorUtils = require('../utils/editor');
	var actionUtils = require('../utils/action');
	var stringStream = require('../assets/stringStream');
	var xmlParser = require('../parser/xml');
	var cssEditTree = require('../editTree/css');
	var cssSections = require('../utils/cssSections');

	var startTag = /^<([\w\:\-]+)((?:\s+[\w\-:]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/;

	/**
	 * Generic function for searching for items to select
	 * @param {IEmmetEditor} editor
	 * @param {Boolean} isBackward Search backward (search forward otherwise)
	 * @param {Function} extractFn Function that extracts item content
	 * @param {Function} rangeFn Function that search for next token range
	 */
	function findItem(editor, isBackward, extractFn, rangeFn) {
		var content = editorUtils.outputInfo(editor).content;
		
		var contentLength = content.length;
		var itemRange, rng;
		/** @type Range */
		var prevRange = range(-1, 0);
		/** @type Range */
		var sel = range(editor.getSelectionRange());
		
		var searchPos = sel.start, loop = 100000; // endless loop protection
		while (searchPos >= 0 && searchPos < contentLength && --loop > 0) {
			if ( (itemRange = extractFn(content, searchPos, isBackward)) ) {
				if (prevRange.equal(itemRange)) {
					break;
				}
				
				prevRange = itemRange.clone();
				rng = rangeFn(itemRange.substring(content), itemRange.start, sel.clone());
				
				if (rng) {
					editor.createSelection(rng.start, rng.end);
					return true;
				} else {
					searchPos = isBackward ? itemRange.start : itemRange.end - 1;
				}
			}
			
			searchPos += isBackward ? -1 : 1;
		}
		
		return false;
	}
	
	// XXX HTML section
	
	/**
	 * Find next HTML item
	 * @param {IEmmetEditor} editor
	 */
	function findNextHTMLItem(editor) {
		var isFirst = true;
		return findItem(editor, false, function(content, searchPos){
			if (isFirst) {
				isFirst = false;
				return findOpeningTagFromPosition(content, searchPos);
			} else {
				return getOpeningTagFromPosition(content, searchPos);
			}
		}, function(tag, offset, selRange) {
			return getRangeForHTMLItem(tag, offset, selRange, false);
		});
	}
	
	/**
	 * Find previous HTML item
	 * @param {IEmmetEditor} editor
	 */
	function findPrevHTMLItem(editor) {
		return findItem(editor, true, getOpeningTagFromPosition, function (tag, offset, selRange) {
			return getRangeForHTMLItem(tag, offset, selRange, true);
		});
	}
	
	/**
	 * Creates possible selection ranges for HTML tag
	 * @param {String} source Original HTML source for tokens
	 * @param {Array} tokens List of HTML tokens
	 * @returns {Array}
	 */
	function makePossibleRangesHTML(source, tokens, offset) {
		offset = offset || 0;
		var result = [];
		var attrStart = -1, attrName = '', attrValue = '', attrValueRange, tagName;
		_.each(tokens, function(tok) {
			switch (tok.type) {
				case 'tag':
					tagName = source.substring(tok.start, tok.end);
					if (/^<[\w\:\-]/.test(tagName)) {
						// add tag name
						result.push(range({
							start: tok.start + 1, 
							end: tok.end
						}));
					}
					break;
				case 'attribute':
					attrStart = tok.start;
					attrName = source.substring(tok.start, tok.end);
					break;
					
				case 'string':
					// attribute value
					// push full attribute first
					result.push(range(attrStart, tok.end - attrStart));
					
					attrValueRange = range(tok);
					attrValue = attrValueRange.substring(source);
					
					// is this a quoted attribute?
					if (isQuote(attrValue.charAt(0)))
						attrValueRange.start++;
					
					if (isQuote(attrValue.charAt(attrValue.length - 1)))
						attrValueRange.end--;
					
					result.push(attrValueRange);
					
					if (attrName == 'class') {
						result = result.concat(classNameRanges(attrValueRange.substring(source), attrValueRange.start));
					}
					
					break;
			}
		});
		
		// offset ranges
		_.each(result, function(r) {
			r.shift(offset);
		});
		
		return _.chain(result)
			.filter(function(item) {        // remove empty
				return !!item.length();
			})
			.uniq(false, function(item) {   // remove duplicates
				return item.toString();
			})
			.value();
	}
	
	/**
	 * Returns ranges of class names in "class" attribute value
	 * @param {String} className
	 * @returns {Array}
	 */
	function classNameRanges(className, offset) {
		offset = offset || 0;
		var result = [];
		/** @type StringStream */
		var stream = stringStream.create(className);
		
		// skip whitespace
		stream.eatSpace();
		stream.start = stream.pos;
		
		var ch;
		while ((ch = stream.next())) {
			if (/[\s\u00a0]/.test(ch)) {
				result.push(range(stream.start + offset, stream.pos - stream.start - 1));
				stream.eatSpace();
				stream.start = stream.pos;
			}
		}
		
		result.push(range(stream.start + offset, stream.pos - stream.start));
		return result;
	}
	
	/**
	 * Returns best HTML tag range match for current selection
	 * @param {String} tag Tag declaration
	 * @param {Number} offset Tag's position index inside content
	 * @param {Range} selRange Selection range
	 * @return {Range} Returns range if next item was found, <code>null</code> otherwise
	 */
	function getRangeForHTMLItem(tag, offset, selRange, isBackward) {
		var ranges = makePossibleRangesHTML(tag, xmlParser.parse(tag), offset);
		
		if (isBackward)
			ranges.reverse();
		
		// try to find selected range
		var curRange = _.find(ranges, function(r) {
			return r.equal(selRange);
		});
		
		if (curRange) {
			var ix = _.indexOf(ranges, curRange);
			if (ix < ranges.length - 1)
				return ranges[ix + 1];
			
			return null;
		}
		
		// no selected range, find nearest one
		if (isBackward)
			// search backward
			return _.find(ranges, function(r) {
				return r.start < selRange.start;
			});
		
		// search forward
		// to deal with overlapping ranges (like full attribute definition
		// and attribute value) let's find range under caret first
		if (!curRange) {
			var matchedRanges = _.filter(ranges, function(r) {
				return r.inside(selRange.end);
			});
			
			if (matchedRanges.length > 1)
				return matchedRanges[1];
		}
		
		
		return _.find(ranges, function(r) {
			return r.end > selRange.end;
		});
	}
	
	/**
	 * Search for opening tag in content, starting at specified position
	 * @param {String} html Where to search tag
	 * @param {Number} pos Character index where to start searching
	 * @return {Range} Returns range if valid opening tag was found,
	 * <code>null</code> otherwise
	 */
	function findOpeningTagFromPosition(html, pos) {
		var tag;
		while (pos >= 0) {
			if ((tag = getOpeningTagFromPosition(html, pos)))
				return tag;
			pos--;
		}
		
		return null;
	}
	
	/**
	 * @param {String} html Where to search tag
	 * @param {Number} pos Character index where to start searching
	 * @return {Range} Returns range if valid opening tag was found,
	 * <code>null</code> otherwise
	 */
	function getOpeningTagFromPosition(html, pos) {
		var m;
		if (html.charAt(pos) == '<' && (m = html.substring(pos, html.length).match(startTag))) {
			return range(pos, m[0]);
		}
	}
	
	function isQuote(ch) {
		return ch == '"' || ch == "'";
	}

	/**
	 * Returns all ranges inside given rule, available for selection
	 * @param  {CSSEditContainer} rule
	 * @return {Array}
	 */
	function findInnerRanges(rule) {
		// rule selector
		var ranges = [rule.nameRange(true)];

		// find nested sections, keep selectors only
		var nestedSections = cssSections.nestedSectionsInRule(rule);
		_.each(nestedSections, function(section) {
			ranges.push(range.create2(section.start, section._selectorEnd));
		});

		// add full property ranges and values
		_.each(rule.list(), function(property) {
			ranges = ranges.concat(makePossibleRangesCSS(property));
		});

		ranges = range.sort(ranges);

		// optimize result: remove empty ranges and duplicates
		return _(ranges)
			.filter(function(item) {
				return !!item.length();
			})
			.uniq(true, function(item) {
				return item.toString();
			})
			.value();
	}
	
	/**
	 * Makes all possible selection ranges for specified CSS property
	 * @param {CSSProperty} property
	 * @returns {Array}
	 */
	function makePossibleRangesCSS(property) {
		// find all possible ranges, sorted by position and size
		var valueRange = property.valueRange(true);
		var result = [property.range(true), valueRange];
		
		// locate parts of complex values.
		// some examples:
		// – 1px solid red: 3 parts
		// – arial, sans-serif: enumeration, 2 parts
		// – url(image.png): function value part
		var value = property.value();
		_.each(property.valueParts(), function(r) {
			// add absolute range
			var clone = r.clone();
			result.push(clone.shift(valueRange.start));
			
			/** @type StringStream */
			var stream = stringStream.create(r.substring(value));
			if (stream.match(/^[\w\-]+\(/, true)) {
				// we have a function, find values in it.
				// but first add function contents
				stream.start = stream.pos;
				stream.backUp(1);
				stream.skipToPair('(', ')');
				stream.backUp(1);
				var fnBody = stream.current();
				result.push(range(clone.start + stream.start, fnBody));
				
				// find parts
				_.each(cssEditTree.findParts(fnBody), function(part) {
					result.push(range(clone.start + stream.start + part.start, part.substring(fnBody)));
				});
			}
		});

		return result;
	}
	
	/**
	 * Tries to find matched CSS property and nearest range for selection
	 * @param {CSSRule} rule
	 * @param {Range} selRange
	 * @param {Boolean} isBackward
	 * @returns {Range}
	 */
	function matchedRangeForCSSProperty(rule, selRange, isBackward) {
		var ranges = findInnerRanges(rule);
		if (isBackward) {
			ranges.reverse();
		}
		
		// return next to selected range, if possible
		var r = _.find(ranges, function(item) {
			return item.equal(selRange);
		});

		if (r) {
			return ranges[_.indexOf(ranges, r) + 1];
		}

		// find matched and (possibly) overlapping ranges
		var nested = _.filter(ranges, function(item) {
			return item.inside(selRange.end);
		});

		if (nested.length) {
			return nested.sort(function(a, b) {
				return a.length() - b.length();
			})[0];
		}

		// return range next to caret
		var test = 
		r = _.find(ranges, isBackward 
			? function(item) {return item.end < selRange.start;}
			: function(item) {return item.end > selRange.start;}
		);

		if (!r) {
			// can’t find anything, just pick first one
			r = ranges[0];
		}

		return r;
	}
	
	function findNextCSSItem(editor) {
		return findItem(editor, false, _.bind(cssSections.locateRule, cssSections), getRangeForNextItemInCSS);
	}
	
	function findPrevCSSItem(editor) {
		return findItem(editor, true, _.bind(cssSections.locateRule, cssSections), getRangeForPrevItemInCSS);
	}
	
	/**
	 * Returns range for item to be selected in CSS after current caret 
	 * (selection) position
	 * @param {String} rule CSS rule declaration
	 * @param {Number} offset Rule's position index inside content
	 * @param {Range} selRange Selection range
	 * @return {Range} Returns range if next item was found, <code>null</code> otherwise
	 */
	function getRangeForNextItemInCSS(rule, offset, selRange) {
		var tree = cssEditTree.parse(rule, {
			offset: offset
		});

		return matchedRangeForCSSProperty(tree, selRange, false);
	}
	
	/**
	 * Returns range for item to be selected in CSS before current caret 
	 * (selection) position
	 * @param {String} rule CSS rule declaration
	 * @param {Number} offset Rule's position index inside content
	 * @param {Range} selRange Selection range
	 * @return {Range} Returns range if previous item was found, <code>null</code> otherwise
	 */
	function getRangeForPrevItemInCSS(rule, offset, selRange) {
		var tree = cssEditTree.parse(rule, {
			offset: offset
		});

		return matchedRangeForCSSProperty(tree, selRange, true);
	}

	return {
		selectNextItemAction: function(editor) {
			if (actionUtils.isSupportedCSS(editor.getSyntax())) {
				return findNextCSSItem(editor);
			} else {
				return findNextHTMLItem(editor);
			}
		},

		selectPreviousItemAction: function(editor) {
			if (actionUtils.isSupportedCSS(editor.getSyntax())) {
				return findPrevCSSItem(editor);
			} else {
				return findPrevHTMLItem(editor);
			}
		}
	};
});
/**
 * Select current line (for simple editors like browser's &lt;textarea&gt;)
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/selectLine',['require','exports','module'],function(require, exports, module) {
	return {
		selectLineAction: function(editor) {
			var range = editor.getCurrentLineRange();
			editor.createSelection(range.start, range.end);
			return true;
		}
	};
});
/**
 * Splits or joins tag, e.g. transforms it into a short notation and vice versa:<br>
 * &lt;div&gt;&lt;/div&gt; → &lt;div /&gt; : join<br>
 * &lt;div /&gt; → &lt;div&gt;&lt;/div&gt; : split
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/splitJoinTag',['require','exports','module','../utils/common','../assets/resources','../assets/htmlMatcher','../utils/editor','../assets/profile'],function(require, exports, module) {
	var utils = require('../utils/common');
	var resources = require('../assets/resources');
	var matcher = require('../assets/htmlMatcher');
	var editorUtils = require('../utils/editor');
	var profile = require('../assets/profile');

	/**
	 * @param {IEmmetEditor} editor
	 * @param {Object} profile
	 * @param {Object} tag
	 */
	function joinTag(editor, profile, tag) {
		// empty closing slash is a nonsense for this action
		var slash = profile.selfClosing() || ' /';
		var content = tag.open.range.substring(tag.source).replace(/\s*>$/, slash + '>');
		
		var caretPos = editor.getCaretPos();
		
		// update caret position
		if (content.length + tag.outerRange.start < caretPos) {
			caretPos = content.length + tag.outerRange.start;
		}
		
		content = utils.escapeText(content);
		editor.replaceContent(content, tag.outerRange.start, tag.outerRange.end);
		editor.setCaretPos(caretPos);
		return true;
	}
	
	function splitTag(editor, profile, tag) {
		var caretPos = editor.getCaretPos();
		
		// define tag content depending on profile
		var tagContent = (profile.tag_nl === true) ? '\n\t\n' : '';
		var content = tag.outerContent().replace(/\s*\/>$/, '>');
		caretPos = tag.outerRange.start + content.length;
		content += tagContent + '</' + tag.open.name + '>';
		
		content = utils.escapeText(content);
		editor.replaceContent(content, tag.outerRange.start, tag.outerRange.end);
		editor.setCaretPos(caretPos);
		return true;
	}

	return {
		splitJoinTagAction: function(editor, profileName) {
			var info = editorUtils.outputInfo(editor, null, profileName);
			var curProfile = profile.get(info.profile);
			
			// find tag at current position
			var tag = matcher.tag(info.content, editor.getCaretPos());
			if (tag) {
				return tag.close 
					? joinTag(editor, curProfile, tag) 
					: splitTag(editor, curProfile, tag);
			}
			
			return false;
		}
	};
});
/**
 * Toggles HTML and CSS comments depending on current caret context. Unlike
 * the same action in most editors, this action toggles comment on currently
 * matched item—HTML tag or CSS selector—when nothing is selected.
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/toggleComment',['require','exports','module','lodash','../assets/preferences','../assets/range','../utils/common','../utils/action','../utils/editor','../assets/htmlMatcher','../editTree/css'],function(require, exports, module) {
	var _ = require('lodash');
	var prefs = require('../assets/preferences');
	var range = require('../assets/range');
	var utils = require('../utils/common');
	var actionUtils = require('../utils/action');
	var editorUtils = require('../utils/editor');
	var htmlMatcher = require('../assets/htmlMatcher');
	var cssEditTree = require('../editTree/css');

	/**
	 * Toggle HTML comment on current selection or tag
	 * @param {IEmmetEditor} editor
	 * @return {Boolean} Returns <code>true</code> if comment was toggled
	 */
	function toggleHTMLComment(editor) {
		/** @type Range */
		var r = range(editor.getSelectionRange());
		var info = editorUtils.outputInfo(editor);
			
		if (!r.length()) {
			// no selection, find matching tag
			var tag = htmlMatcher.tag(info.content, editor.getCaretPos());
			if (tag) { // found pair
				r = tag.outerRange;
			}
		}
		
		return genericCommentToggle(editor, '<!--', '-->', r);
	}

	/**
	 * Simple CSS commenting
	 * @param {IEmmetEditor} editor
	 * @return {Boolean} Returns <code>true</code> if comment was toggled
	 */
	function toggleCSSComment(editor) {
		/** @type Range */
		var rng = range(editor.getSelectionRange());
		var info = editorUtils.outputInfo(editor);
			
		if (!rng.length()) {
			// no selection, try to get current rule
			/** @type CSSRule */
			var rule = cssEditTree.parseFromPosition(info.content, editor.getCaretPos());
			if (rule) {
				var property = cssItemFromPosition(rule, editor.getCaretPos());
				rng = property 
					? property.range(true) 
					: range(rule.nameRange(true).start, rule.source);
			}
		}
		
		if (!rng.length()) {
			// still no selection, get current line
			rng = range(editor.getCurrentLineRange());
			utils.narrowToNonSpace(info.content, rng);
		}
		
		return genericCommentToggle(editor, '/*', '*/', rng);
	}
	
	/**
	 * Returns CSS property from <code>rule</code> that matches passed position
	 * @param {EditContainer} rule
	 * @param {Number} absPos
	 * @returns {EditElement}
	 */
	function cssItemFromPosition(rule, absPos) {
		// do not use default EditContainer.itemFromPosition() here, because
		// we need to make a few assumptions to make CSS commenting more reliable
		var relPos = absPos - (rule.options.offset || 0);
		var reSafeChar = /^[\s\n\r]/;
		return _.find(rule.list(), function(item) {
			if (item.range().end === relPos) {
				// at the end of property, but outside of it
				// if there’s a space character at current position,
				// use current property
				return reSafeChar.test(rule.source.charAt(relPos));
			}
			
			return item.range().inside(relPos);
		});
	}

	/**
	 * Search for nearest comment in <code>str</code>, starting from index <code>from</code>
	 * @param {String} text Where to search
	 * @param {Number} from Search start index
	 * @param {String} start_token Comment start string
	 * @param {String} end_token Comment end string
	 * @return {Range} Returns null if comment wasn't found
	 */
	function searchComment(text, from, startToken, endToken) {
		var commentStart = -1;
		var commentEnd = -1;
		
		var hasMatch = function(str, start) {
			return text.substr(start, str.length) == str;
		};
			
		// search for comment start
		while (from--) {
			if (hasMatch(startToken, from)) {
				commentStart = from;
				break;
			}
		}
		
		if (commentStart != -1) {
			// search for comment end
			from = commentStart;
			var contentLen = text.length;
			while (contentLen >= from++) {
				if (hasMatch(endToken, from)) {
					commentEnd = from + endToken.length;
					break;
				}
			}
		}
		
		return (commentStart != -1 && commentEnd != -1) 
			? range(commentStart, commentEnd - commentStart) 
			: null;
	}

	/**
	 * Generic comment toggling routine
	 * @param {IEmmetEditor} editor
	 * @param {String} commentStart Comment start token
	 * @param {String} commentEnd Comment end token
	 * @param {Range} range Selection range
	 * @return {Boolean}
	 */
	function genericCommentToggle(editor, commentStart, commentEnd, range) {
		var content = editorUtils.outputInfo(editor).content;
		var caretPos = editor.getCaretPos();
		var newContent = null;
			
		/**
		 * Remove comment markers from string
		 * @param {Sting} str
		 * @return {String}
		 */
		function removeComment(str) {
			return str
				.replace(new RegExp('^' + utils.escapeForRegexp(commentStart) + '\\s*'), function(str){
					caretPos -= str.length;
					return '';
				}).replace(new RegExp('\\s*' + utils.escapeForRegexp(commentEnd) + '$'), '');
		}
		
		// first, we need to make sure that this substring is not inside 
		// comment
		var commentRange = searchComment(content, caretPos, commentStart, commentEnd);
		if (commentRange && commentRange.overlap(range)) {
			// we're inside comment, remove it
			range = commentRange;
			newContent = removeComment(range.substring(content));
		} else {
			// should add comment
			// make sure that there's no comment inside selection
			newContent = commentStart + ' ' +
				range.substring(content)
					.replace(new RegExp(utils.escapeForRegexp(commentStart) + '\\s*|\\s*' + utils.escapeForRegexp(commentEnd), 'g'), '') +
				' ' + commentEnd;
				
			// adjust caret position
			caretPos += commentStart.length + 1;
		}

		// replace editor content
		if (newContent !== null) {
			newContent = utils.escapeText(newContent);
			editor.setCaretPos(range.start);
			editor.replaceContent(editorUtils.unindent(editor, newContent), range.start, range.end);
			editor.setCaretPos(caretPos);
			return true;
		}
		
		return false;
	}
	
	return {
		/**
		 * Toggle comment on current editor's selection or HTML tag/CSS rule
		 * @param {IEmmetEditor} editor
		 */
		toggleCommentAction: function(editor) {
			var info = editorUtils.outputInfo(editor);
			if (actionUtils.isSupportedCSS(info.syntax)) {
				// in case our editor is good enough and can recognize syntax from 
				// current token, we have to make sure that cursor is not inside
				// 'style' attribute of html element
				var caretPos = editor.getCaretPos();
				var tag = htmlMatcher.tag(info.content, caretPos);
				if (tag && tag.open.range.inside(caretPos)) {
					info.syntax = 'html';
				}
			}
			
			var cssSyntaxes = prefs.getArray('css.syntaxes');
			if (_.include(cssSyntaxes, info.syntax)) {
				return toggleCSSComment(editor);
			}
			
			return toggleHTMLComment(editor);
		}
	};
});
/**
 * Automatically updates image size attributes in HTML's &lt;img&gt; element or
 * CSS rule
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/updateImageSize',['require','exports','module','lodash','../utils/editor','../utils/action','../editTree/xml','../editTree/css','../utils/base64','../plugin/file'],function(require, exports, module) {
	var _ = require('lodash');
	var editorUtils = require('../utils/editor');
	var actionUtils = require('../utils/action');
	var xmlEditTree = require('../editTree/xml');
	var cssEditTree = require('../editTree/css');
	var base64 = require('../utils/base64');
	var file = require('../plugin/file');

	/**
	 * Updates image size of &lt;img src=""&gt; tag
	 * @param {IEmmetEditor} editor
	 */
	function updateImageSizeHTML(editor) {
		var offset = editor.getCaretPos();
		
		// find tag from current caret position
		var info = editorUtils.outputInfo(editor);
		var xmlElem = xmlEditTree.parseFromPosition(info.content, offset, true);
		if (xmlElem && (xmlElem.name() || '').toLowerCase() == 'img') {
			getImageSizeForSource(editor, xmlElem.value('src'), function(size) {
				if (size) {
					var compoundData = xmlElem.range(true);
					xmlElem.value('width', size.width);
					xmlElem.value('height', size.height, xmlElem.indexOf('width') + 1);
					
					actionUtils.compoundUpdate(editor, _.extend(compoundData, {
						data: xmlElem.toString(),
						caret: offset
					}));
				}
			});
		}
	}
	
	/**
	 * Updates image size of CSS property
	 * @param {IEmmetEditor} editor
	 */
	function updateImageSizeCSS(editor) {
		var offset = editor.getCaretPos();
		
		// find tag from current caret position
		var info = editorUtils.outputInfo(editor);
		var cssRule = cssEditTree.parseFromPosition(info.content, offset, true);
		if (cssRule) {
			// check if there is property with image under caret
			var prop = cssRule.itemFromPosition(offset, true), m;
			if (prop && (m = /url\((["']?)(.+?)\1\)/i.exec(prop.value() || ''))) {
				getImageSizeForSource(editor, m[2], function(size) {
					if (size) {
						var compoundData = cssRule.range(true);
						cssRule.value('width', size.width + 'px');
						cssRule.value('height', size.height + 'px', cssRule.indexOf('width') + 1);
						
						actionUtils.compoundUpdate(editor, _.extend(compoundData, {
							data: cssRule.toString(),
							caret: offset
						}));
					}
				});
			}
		}
	}
	
	/**
	 * Returns image dimensions for source
	 * @param {IEmmetEditor} editor
	 * @param {String} src Image source (path or data:url)
	 */
	function getImageSizeForSource(editor, src, callback) {
		var fileContent;
		if (src) {
			// check if it is data:url
			if (/^data:/.test(src)) {
				fileContent = base64.decode( src.replace(/^data\:.+?;.+?,/, '') );
				return callback(actionUtils.getImageSize(fileContent));
			}
			
			var absPath = file.locateFile(editor.getFilePath(), src);
			if (absPath === null) {
				throw "Can't find " + src + ' file';
			}
			
			file.read(absPath, function(err, content) {
				if (err) {
					throw 'Unable to read ' + absPath + ': ' + err;
				}
				
				content = String(content);
				callback(actionUtils.getImageSize(content));
			});
		}
	}
	
	return {
		updateImageSizeAction: function(editor) {
			// this action will definitely won’t work in SASS dialect,
			// but may work in SCSS or LESS
			if (actionUtils.isSupportedCSS(editor.getSyntax())) {
				updateImageSizeCSS(editor);
			} else {
				updateImageSizeHTML(editor);
			}
			
			return true;
		}
	};
});
/**
 * Action that wraps content with abbreviation. For convenience, action is 
 * defined as reusable module
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/wrapWithAbbreviation',['require','exports','module','lodash','../assets/range','../assets/htmlMatcher','../utils/common','../utils/editor','../utils/action','../parser/abbreviation'],function(require, exports, module) {
	var _ = require('lodash');
	var range = require('../assets/range');
	var htmlMatcher = require('../assets/htmlMatcher');
	var utils = require('../utils/common');
	var editorUtils = require('../utils/editor');
	var actionUtils = require('../utils/action');
	var parser = require('../parser/abbreviation');
	
	return {
		/**
		 * Wraps content with abbreviation
		 * @param {IEmmetEditor} Editor instance
		 * @param {String} abbr Abbreviation to wrap with
		 * @param {String} syntax Syntax type (html, css, etc.)
		 * @param {String} profile Output profile name (html, xml, xhtml)
		 */
		wrapWithAbbreviationAction: function(editor, abbr, syntax, profile) {
			var info = editorUtils.outputInfo(editor, syntax, profile);
			abbr = abbr || editor.prompt("Enter abbreviation");
			
			if (!abbr) {
				return null;
			}
			
			abbr = String(abbr);
			
			var r = range(editor.getSelectionRange());
			
			if (!r.length()) {
				// no selection, find tag pair
				var match = htmlMatcher.tag(info.content, r.start);
				if (!match) {  // nothing to wrap
					return false;
				}
				
				r = utils.narrowToNonSpace(info.content, match.range);
			}
			
			var newContent = utils.escapeText(r.substring(info.content));
			var result = parser.expand(abbr, {
				pastedContent: editorUtils.unindent(editor, newContent),
				syntax: info.syntax,
				profile: info.profile,
				contextNode: actionUtils.captureContext(editor)
			});
			
			if (result) {
				editor.replaceContent(result, r.start, r.end);
				return true;
			}
			
			return false;
		}
	};
});
/**
 * Update Tag action: allows users to update existing HTML tags and add/remove
 * attributes or even tag name
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/updateTag',['require','exports','module','lodash','../editTree/xml','../utils/editor','../utils/action','../utils/common','../parser/abbreviation'],function(require, exports, module) {
	var _ = require('lodash');
	var xmlEditTree = require('../editTree/xml');
	var editorUtils = require('../utils/editor');
	var actionUtils = require('../utils/action');
	var utils = require('../utils/common');
	var parser = require('../parser/abbreviation');

	function updateAttributes(tag, abbrNode, ix) {
		var classNames = (abbrNode.attribute('class') || '').split(/\s+/g);
		if (ix) {
			classNames.push('+' + abbrNode.name());
		}

		var r = function(str) {
			return utils.replaceCounter(str, abbrNode.counter);
		};

		// update class
		_.each(classNames, function(className) {
			if (!className) {
				return;
			}

			className = r(className);
			var ch = className.charAt(0);
			if (ch == '+') {
				tag.addClass(className.substr(1));
			} else if (ch == '-') {
				tag.removeClass(className.substr(1));
			} else {
				tag.value('class', className);
			}
		});

		// update attributes
		_.each(abbrNode.attributeList(), function(attr) {
			if (attr.name.toLowerCase() == 'class') {
				return;
			}

			var ch = attr.name.charAt(0);
			if (ch == '+') {
				var attrName = attr.name.substr(1);
				var tagAttr = tag.get(attrName);
				if (tagAttr) {
					tagAttr.value(tagAttr.value() + r(attr.value));
				} else {
					tag.value(attrName, r(attr.value));
				}
			} else if (ch == '-') {
				tag.remove(attr.name.substr(1));
			} else {
				tag.value(attr.name, r(attr.value));
			}
		});
	}
	
	return {
		/**
		 * Matches HTML tag under caret and updates its definition
		 * according to given abbreviation
		 * @param {IEmmetEditor} Editor instance
		 * @param {String} abbr Abbreviation to update with
		 */
		updateTagAction: function(editor, abbr) {
			abbr = abbr || editor.prompt("Enter abbreviation");

			if (!abbr) {
				return false;
			}

			var content = editor.getContent();
			var ctx = actionUtils.captureContext(editor);
			var tag = this.getUpdatedTag(abbr, ctx, content);

			if (!tag) {
				// nothing to update
				return false;
			}

			// check if tag name was updated
			if (tag.name() != ctx.name && ctx.match.close) {
				editor.replaceContent('</' + tag.name() + '>', ctx.match.close.range.start, ctx.match.close.range.end, true);
			}

			editor.replaceContent(tag.source, ctx.match.open.range.start, ctx.match.open.range.end, true);
			return true;
		},

		/**
		 * Returns XMLEditContainer node with updated tag structure
		 * of existing tag context.
		 * This data can be used to modify existing tag
		 * @param  {String} abbr    Abbreviation
		 * @param  {Object} ctx     Tag to be updated (captured with `htmlMatcher`)
		 * @param  {String} content Original editor content
		 * @return {XMLEditContainer}
		 */
		getUpdatedTag: function(abbr, ctx, content, options) {
			if (!ctx) {
				// nothing to update
				return null;
			}

			var tree = parser.parse(abbr, options || {});

			// for this action some characters in abbreviation has special
			// meaning. For example, `.-c2` means “remove `c2` class from
			// element” and `.+c3` means “append class `c3` to exising one.
			// 
			// But `.+c3` abbreviation will actually produce two elements:
			// <div class=""> and <c3>. Thus, we have to walk on each element
			// of parsed tree and use their definitions to update current element
			var tag = xmlEditTree.parse(ctx.match.open.range.substring(content), {
				offset: ctx.match.outerRange.start
			});

			_.each(tree.children, function(node, i) {
				updateAttributes(tag, node, i);
			});

			// if tag name was resolved by implicit tag name resolver,
			// then user omitted it in abbreviation and wants to keep
			// original tag name
			var el = tree.children[0];
			if (!el.data('nameResolved')) {
				tag.name(el.name());
			}

			return tag;
		}
	};
});
/**
 * Module describes and performs Emmet actions. The actions themselves are
 * defined in <i>actions</i> folder
 */
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('action/main',['require','exports','module','lodash','../utils/common','./base64','./editPoints','./evaluateMath','./expandAbbreviation','./incrementDecrement','./lineBreaks','./balance','./mergeLines','./reflectCSSValue','./removeTag','./selectItem','./selectLine','./splitJoinTag','./toggleComment','./updateImageSize','./wrapWithAbbreviation','./updateTag'],function(require, exports, module) {
	var _ = require('lodash');
	var utils = require('../utils/common');

	// all registered actions
	var actions = {};

	// load all default actions
	var actionModules = {
		base64: require('./base64'),
		editPoints: require('./editPoints'),
		evaluateMath: require('./evaluateMath'),
		expandAbbreviation: require('./expandAbbreviation'),
		incrementDecrement: require('./incrementDecrement'),
		lineBreaks: require('./lineBreaks'),
		balance: require('./balance'),
		mergeLines: require('./mergeLines'),
		reflectCSSValue: require('./reflectCSSValue'),
		removeTag: require('./removeTag'),
		selectItem: require('./selectItem'),
		selectLine: require('./selectLine'),
		splitJoinTag: require('./splitJoinTag'),
		toggleComment: require('./toggleComment'),
		updateImageSize: require('./updateImageSize'),
		wrapWithAbbreviation: require('./wrapWithAbbreviation'),
		updateTag: require('./updateTag')
	};

	function addAction(name, fn, options) {
		name = name.toLowerCase();
		options = options || {};
		
		if (_.isString(options)) {
			options = {label: options};
		}

		if (!options.label) {
			options.label = humanizeActionName(name);
		}
		
		actions[name] = {
			name: name,
			fn: fn,
			options: options
		};
	}
	
	/**
	 * “Humanizes” action name, makes it more readable for people
	 * @param {String} name Action name (like 'expand_abbreviation')
	 * @return Humanized name (like 'Expand Abbreviation')
	 */
	function humanizeActionName(name) {
		return utils.trim(name.charAt(0).toUpperCase() 
			+ name.substring(1).replace(/_[a-z]/g, function(str) {
				return ' ' + str.charAt(1).toUpperCase();
			}));
	}

	var bind = function(name, method) {
		var m = actionModules[name];
		return _.bind(m[method], m);
	};

	// XXX register default actions
	addAction('encode_decode_data_url', bind('base64', 'encodeDecodeDataUrlAction'), 'Encode\\Decode data:URL image');
	addAction('prev_edit_point', bind('editPoints', 'previousEditPointAction'), 'Previous Edit Point');
	addAction('next_edit_point', bind('editPoints', 'nextEditPointAction'), 'Next Edit Point');
	addAction('evaluate_math_expression', bind('evaluateMath', 'evaluateMathAction'), 'Numbers/Evaluate Math Expression');
	addAction('expand_abbreviation_with_tab', bind('expandAbbreviation', 'expandAbbreviationWithTabAction'), {hidden: true});
	addAction('expand_abbreviation', bind('expandAbbreviation', 'expandAbbreviationAction'), 'Expand Abbreviation');
	addAction('insert_formatted_line_break_only', bind('lineBreaks', 'insertLineBreakOnlyAction'), {hidden: true});
	addAction('insert_formatted_line_break', bind('lineBreaks', 'insertLineBreakAction'), {hidden: true});
	addAction('balance_inward', bind('balance', 'balanceInwardAction'), 'Balance (inward)');
	addAction('balance_outward', bind('balance', 'balanceOutwardAction'), 'Balance (outward)');
	addAction('matching_pair', bind('balance', 'goToMatchingPairAction'), 'HTML/Go To Matching Tag Pair');
	addAction('merge_lines', bind('mergeLines', 'mergeLinesAction'), 'Merge Lines');
	addAction('reflect_css_value', bind('reflectCSSValue', 'reflectCSSValueAction'), 'CSS/Reflect Value');
	addAction('remove_tag', bind('removeTag', 'removeTagAction'), 'HTML/Remove Tag');
	addAction('select_next_item', bind('selectItem', 'selectNextItemAction'), 'Select Next Item');
	addAction('select_previous_item', bind('selectItem', 'selectPreviousItemAction'), 'Select Previous Item');
	addAction('split_join_tag', bind('splitJoinTag', 'splitJoinTagAction'), 'HTML/Split\\Join Tag Declaration');
	addAction('toggle_comment', bind('toggleComment', 'toggleCommentAction'), 'Toggle Comment');
	addAction('update_image_size', bind('updateImageSize', 'updateImageSizeAction'), 'Update Image Size');
	addAction('wrap_with_abbreviation', bind('wrapWithAbbreviation', 'wrapWithAbbreviationAction'), 'Wrap With Abbreviation');
	addAction('update_tag', bind('updateTag', 'updateTagAction'), 'HTML/Update Tag');

	_.each([1, -1, 10, -10, 0.1, -0.1], function(num) {
		var prefix = num > 0 ? 'increment' : 'decrement';
		var suffix = String(Math.abs(num)).replace('.', '').substring(0, 2);
		var actionId = prefix + '_number_by_' + suffix;
		var actionMethod = prefix + suffix + 'Action';
		var actionLabel = 'Numbers/' + prefix.charAt(0).toUpperCase() + prefix.substring(1) + ' number by ' + Math.abs(num);
		addAction(actionId, bind('incrementDecrement', actionMethod), actionLabel);
	});
	
	return {
		/**
		 * Registers new action
		 * @param {String} name Action name
		 * @param {Function} fn Action function
		 * @param {Object} options Custom action options:<br>
		 * <b>label</b> : (<code>String</code>) – Human-readable action name. 
		 * May contain '/' symbols as submenu separators<br>
		 * <b>hidden</b> : (<code>Boolean</code>) – Indicates whether action
		 * should be displayed in menu (<code>getMenu()</code> method)
		 */
		add: addAction,
		
		/**
		 * Returns action object
		 * @param {String} name Action name
		 * @returns {Object}
		 */
		get: function(name) {
			return actions[name.toLowerCase()];
		},
		
		/**
		 * Runs Emmet action. For list of available actions and their
		 * arguments see <i>actions</i> folder.
		 * @param {String} name Action name 
		 * @param {Array} args Additional arguments. It may be array of arguments
		 * or inline arguments. The first argument should be <code>IEmmetEditor</code> instance
		 * @returns {Boolean} Status of performed operation, <code>true</code>
		 * means action was performed successfully.
		 * @example
		 * require('action/main').run('expand_abbreviation', editor);  
		 * require('action/main').run('wrap_with_abbreviation', [editor, 'div']);  
		 */
		run: function(name, args) {
			if (!_.isArray(args)) {
				args = _.rest(arguments);
			}
			
			var action = this.get(name);
			if (!action) {
				throw 'Action "' + name + '" is not defined';
			}

			return action.fn.apply(action, args);
		},
		
		/**
		 * Returns all registered actions as object
		 * @returns {Object}
		 */
		getAll: function() {
			return actions;
		},
		
		/**
		 * Returns all registered actions as array
		 * @returns {Array}
		 */
		getList: function() {
			return _.values(this.getAll());
		},
		
		/**
		 * Returns actions list as structured menu. If action has <i>label</i>,
		 * it will be splitted by '/' symbol into submenus (for example: 
		 * CSS/Reflect Value) and grouped with other items
		 * @param {Array} skipActions List of action identifiers that should be 
		 * skipped from menu
		 * @returns {Array}
		 */
		getMenu: function(skipActions) {
			var result = [];
			skipActions = skipActions || [];
			_.each(this.getList(), function(action) {
				if (action.options.hidden || _.include(skipActions, action.name))
					return;
				
				var actionName = humanizeActionName(action.name);
				var ctx = result;
				if (action.options.label) {
					var parts = action.options.label.split('/');
					actionName = parts.pop();
					
					// create submenus, if needed
					var menuName, submenu;
					while ((menuName = parts.shift())) {
						submenu = _.find(ctx, function(item) {
							return item.type == 'submenu' && item.name == menuName;
						});
						
						if (!submenu) {
							submenu = {
								name: menuName,
								type: 'submenu',
								items: []
							};
							ctx.push(submenu);
						}
						
						ctx = submenu.items;
					}
				}
				
				ctx.push({
					type: 'action',
					name: action.name,
					label: actionName
				});
			});
			
			return result;
		},

		/**
		 * Returns action name associated with menu item title
		 * @param {String} title
		 * @returns {String}
		 */
		getActionNameForMenuTitle: function(title, menu) {
			var item = null;
			_.find(menu || this.getMenu(), function(val) {
				if (val.type == 'action') {
					if (val.label == title || val.name == title) {
						return item = val.name;
					}
				} else {
					return item = this.getActionNameForMenuTitle(title, val.items);
				}
			}, this);
			
			return item || null;
		}
	};
});
if (typeof module === 'object' && typeof define !== 'function') {
	var define = function (factory) {
		module.exports = factory(require, exports, module);
	};
}

define('emmet',['require','exports','module','lodash','./utils/common','./action/main','./parser/abbreviation','./plugin/file','./assets/preferences','./assets/resources','./assets/profile','./assets/caniuse','./assets/logger'],function(require, exports, module) {
	var global = typeof self != 'undefined' ? self : this;

	var _ = require('lodash');
	var utils = require('./utils/common');
	var actions = require('./action/main');
	var parser = require('./parser/abbreviation');
	var file = require('./plugin/file');

	var preferences = require('./assets/preferences');
	var resources = require('./assets/resources');
	var profile = require('./assets/profile');
	var ciu = require('./assets/caniuse');
	var logger = require('./assets/logger');

	/**
	 * Returns file name part from path
	 * @param {String} path Path to file
	 * @return {String}
	 */
	function getFileName(path) {
		var re = /([\w\.\-]+)$/i;
		var m = re.exec(path);
		return m ? m[1] : '';
	}

	/**
	 * Normalizes profile definition: converts some
	 * properties to valid data types
	 * @param {Object} profile
	 * @return {Object}
	 */
	function normalizeProfile(profile) {
		if (_.isObject(profile)) {
			if ('indent' in profile) {
				profile.indent = !!profile.indent;
			}

			if ('self_closing_tag' in profile) {
				if (_.isNumber(profile.self_closing_tag)) {
					profile.self_closing_tag = !!profile.self_closing_tag;
				}
			}
		}

		return profile;
	}
	
	return {
		/**
		 * Helper method that just executes passed function but with all 
		 * important arguments like 'require' and '_'
		 * @deprecated Use RequireJS modules to access Emmet modules
		 * @param {Function} fn
		 * @param {Object} context Execution context
		 */
		exec: function(fn, context) {
			return fn.call(context || global, require, _, this);
		},

		/**
		 * The essential function that expands Emmet abbreviation
		 * @param {String} abbr Abbreviation to parse
		 * @param {String} syntax Abbreviation's context syntax
		 * @param {String} profile Output profile (or its name)
		 * @param {Object} contextNode Contextual node where abbreviation is
		 * written
		 * @return {String}
		 */
		expandAbbreviation: function(abbr, syntax, profile, contextNode) {
			return parser.expand(abbr, {
				syntax: syntax,
				profile: profile,
				contextNode: contextNode
			});
		},

		/**
		 * Runs given action
		 * @param  {String} name Action name
		 * @param  {IEmmetEditor} editor Editor instance
		 * @return {Boolean} Returns true if action was performed successfully
		 */
		run: function(name) {
			return actions.run.apply(actions, _.toArray(arguments));
		},

		/**
		 * Loads Emmet extensions. Extensions are simple .js files that
		 * uses Emmet modules and resources to create new actions, modify
		 * existing ones etc.
		 * @param {Array} fileList List of absolute paths to files in extensions 
		 * folder. Back-end app should not filter this list (e.g. by extension) 
		 * but return it "as-is" so bootstrap can decide how to load contents 
		 * of each file.
		 * This method requires a <code>file</code> module of <code>IEmmetFile</code> 
		 * interface to be implemented.
		 * @memberOf bootstrap
		 */
		loadExtensions: function(fileList) {
			var payload = {};
			var userSnippets = null;
			var that = this;

			// make sure file list contians only valid extension files
			fileList = _.filter(fileList, function(f) {
				var ext = file.getExt(f);
				return ext === 'json' || ext === 'js';
			});

			var reader = _.bind(file.readText || file.read, file);
			var next = function() {
				if (fileList.length) {
					var f = fileList.shift();
					reader(f, function(err, content) {
						if (err) {
							logger.log('Unable to read "' + f + '" file: '+ err);
							return next();
						}
												
						switch (file.getExt(f)) {
							case 'js':
								try {
									eval(content);
								} catch (e) {
									logger.log('Unable to eval "' + f + '" file: '+ e);
								}
								break;
							case 'json':
								var fileName = getFileName(f).toLowerCase().replace(/\.json$/, '');
								if (/^snippets/.test(fileName)) {
									if (fileName === 'snippets') {
										// data in snippets.json is more important to user
										userSnippets = utils.parseJSON(content);
									} else {
										payload.snippets = utils.deepMerge(payload.snippets || {}, utils.parseJSON(content));
									}
								} else {
									payload[fileName] = content;
								}
								
								break;
						}
						
						next();
					});
				} else {
					// complete
					if (userSnippets) {
						payload.snippets = utils.deepMerge(payload.snippets || {}, userSnippets);
					}
					
					that.loadUserData(payload);
				}
			};
			
			next();
		},
		
		/**
		 * Loads preferences from JSON object (or string representation of JSON)
		 * @param {Object} data
		 * @returns
		 */
		loadPreferences: function(data) {
			preferences.load(utils.parseJSON(data));
		},
		
		/**
		 * Loads user snippets and abbreviations. It doesn’t replace current
		 * user resource vocabulary but merges it with passed one. If you need 
		 * to <i>replaces</i> user snippets you should call 
		 * <code>resetSnippets()</code> method first
		 */
		loadSnippets: function(data) {
			data = utils.parseJSON(data);
			
			var userData = resources.getVocabulary('user') || {};
			resources.setVocabulary(utils.deepMerge(userData, data), 'user');
		},
		
		/**
		 * Helper function that loads default snippets, defined in project’s
		 * <i>snippets.json</i>
		 * @param {Object} data
		 */
		loadSystemSnippets: function(data) {
			resources.setVocabulary(utils.parseJSON(data), 'system');
		},

		/**
		 * Helper function that loads Can I Use database
		 * @param {Object} data
		 */
		loadCIU: function(data) {
			ciu.load(utils.parseJSON(data));
		},
		
		/**
		 * Removes all user-defined snippets
		 */
		resetSnippets: function() {
			resources.setVocabulary({}, 'user');
		},
		
		/**
		 * Helper function that loads all user data (snippets and preferences)
		 * defined as a single JSON object. This is useful for loading data 
		 * stored in a common storage, for example <code>NSUserDefaults</code>
		 * @param {Object} data
		 */
		loadUserData: function(data) {
			data = utils.parseJSON(data);
			if (data.snippets) {
				this.loadSnippets(data.snippets);
			}
			
			if (data.preferences) {
				this.loadPreferences(data.preferences);
			}
			
			if (data.profiles) {
				this.loadProfiles(data.profiles);
			}

			if (data.caniuse) {
				this.loadCIU(data.caniuse);
			}
			
			var profiles = data.syntaxProfiles || data.syntaxprofiles;
			if (profiles) {
				this.loadSyntaxProfiles(profiles);
			}
		},
		
		/**
		 * Resets all user-defined data: preferences, snippets etc.
		 * @returns
		 */
		resetUserData: function() {
			this.resetSnippets();
			preferences.reset();
			profile.reset();
		},
		
		/**
		 * Load syntax-specific output profiles. These are essentially 
		 * an extension to syntax snippets 
		 * @param {Object} profiles Dictionary of profiles
		 */
		loadSyntaxProfiles: function(profiles) {
			profiles = utils.parseJSON(profiles);
			var snippets = {};
			_.each(profiles, function(options, syntax) {
				if (!(syntax in snippets)) {
					snippets[syntax] = {};
				}
				snippets[syntax].profile = normalizeProfile(options);
			});
			
			this.loadSnippets(snippets);
		},
		
		/**
		 * Load named profiles
		 * @param {Object} profiles
		 */
		loadProfiles: function(profiles) {
			_.each(utils.parseJSON(profiles), function(options, name) {
				profile.create(name, normalizeProfile(options));
			});
		},

		require: require
	};
});var _emmet = require("emmet");_emmet.require = require;_emmet.define = define;return _emmet;}));