/*
Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

/**
 * @fileOverview The "wysiwygarea" plugin. It registers the "wysiwyg" editing
 *		mode, which handles the main editing area space.
 */

(function()
{
	// List of elements in which has no way to move editing focus outside.
	var nonExitableElementNames = { table:1,pre:1 };

	// Matching an empty paragraph at the end of document.
	var emptyParagraphRegexp = /\s*<(p|div|address|h\d|center)[^>]*>\s*(?:<br[^>]*>|&nbsp;|\u00A0|&#160;)?\s*(:?<\/\1>)?(?=\s*$|<\/body>)/gi;

	var notWhitespaceEval = CKEDITOR.dom.walker.whitespaces( true );

	function checkReadOnly( selection )
	{
		if ( selection.getType() == CKEDITOR.SELECTION_ELEMENT )
			return selection.getSelectedElement().isReadOnly();
		else
			return selection.getCommonAncestor().isReadOnly();
	}

	function onInsertHtml( evt )
	{
		if ( this.mode == 'wysiwyg' )
		{
			this.focus();

			var selection = this.getSelection();
			if ( checkReadOnly( selection ) )
				return;

			var data = evt.data;
			this.fire( 'saveSnapshot' );

			if ( this.dataProcessor )
				data = this.dataProcessor.toHtml( data );

			if ( CKEDITOR.env.ie )
			{
				var selIsLocked = selection.isLocked;

				if ( selIsLocked )
					selection.unlock();

				var $sel = selection.getNative();

				// Delete control selections to avoid IE bugs on pasteHTML.
				if ( $sel.type == 'Control' )
					$sel.clear();
				else if  ( selection.getType() == CKEDITOR.SELECTION_TEXT )
				{
					// Due to IE bugs on handling contenteditable=false blocks
					// (#6005), we need to make some checks and eventually
					// delete the selection first.

					var range = selection.getRanges()[0],
						endContainer = range && range.endContainer;

					if ( endContainer &&
 						 endContainer.type == CKEDITOR.NODE_ELEMENT &&
 						 endContainer.getAttribute( 'contenteditable' ) == 'false' &&
						 range.checkBoundaryOfElement( endContainer, CKEDITOR.END ) )
					{
						range.setEndAfter( range.endContainer );
						range.deleteContents();
					}
				}

				try
				{
					$sel.createRange().pasteHTML( data );
				}
				catch (e) {}

				if ( selIsLocked )
					this.getSelection().lock();
			}
			else
				this.document.$.execCommand( 'inserthtml', false, data );

			// Webkit does not scroll to the cursor position after pasting (#5558)
			if ( CKEDITOR.env.webkit )
			{
				this.document.$.execCommand( 'inserthtml', false, '<span id="cke_paste_marker" cke_temp="1"></span>' );
				var marker = this.document.getById( 'cke_paste_marker' );
				marker.scrollIntoView();
				marker.remove();
			}

			CKEDITOR.tools.setTimeout( function()
				{
					this.fire( 'saveSnapshot' );
				}, 0, this );
		}
	}

	function onInsertElement( evt )
	{
		if ( this.mode == 'wysiwyg' )
		{
			this.focus();

			var selection = this.getSelection();
			if ( checkReadOnly( selection ) )
				return;

			this.fire( 'saveSnapshot' );

			var ranges = selection.getRanges(),
				element = evt.data,
				elementName = element.getName(),
				isBlock = CKEDITOR.dtd.$block[ elementName ];

			var selIsLocked = selection.isLocked;

			if ( selIsLocked )
				selection.unlock();

			var range, clone, lastElement, bookmark;

			for ( var i = ranges.length - 1 ; i >= 0 ; i-- )
			{
				range = ranges[ i ];

				// Remove the original contents.
				range.deleteContents();

				clone = !i && element || element.clone( true );

				// If we're inserting a block at dtd-violated position, split
				// the parent blocks until we reach blockLimit.
				var current, dtd;
				if ( isBlock )
				{
					while ( ( current = range.getCommonAncestor( false, true ) )
							&& ( dtd = CKEDITOR.dtd[ current.getName() ] )
							&& !( dtd && dtd [ elementName ] ) )
					{
						// Split up inline elements.
						if ( current.getName() in CKEDITOR.dtd.span )
							range.splitElement( current );
						// If we're in an empty block which indicate a new paragraph,
						// simply replace it with the inserting block.(#3664)
						else if ( range.checkStartOfBlock()
							 && range.checkEndOfBlock() )
						{
							range.setStartBefore( current );
							range.collapse( true );
							current.remove();
						}
						else
							range.splitBlock();
					}
				}

				// Insert the new node.
				range.insertNode( clone );

				// Save the last element reference so we can make the
				// selection later.
				if ( !lastElement )
					lastElement = clone;
			}

			range.moveToPosition( lastElement, CKEDITOR.POSITION_AFTER_END );

			// If we're inserting a block element immediatelly followed by
			// another block element, the selection must move there. (#3100,#5436)
			if ( isBlock )
			{
				var next = lastElement.getNext( notWhitespaceEval ),
					nextName = next && next.type == CKEDITOR.NODE_ELEMENT && next.getName();

				// Check if it's a block element that accepts text.
				if ( nextName && CKEDITOR.dtd.$block[ nextName ] && CKEDITOR.dtd[ nextName ]['#'] )
					range.moveToElementEditStart( next );
			}

			selection.selectRanges( [ range ] );

			if ( selIsLocked )
				this.getSelection().lock();

			// Save snaps after the whole execution completed.
			// This's a workaround for make DOM modification's happened after
			// 'insertElement' to be included either, e.g. Form-based dialogs' 'commitContents'
			// call.
			CKEDITOR.tools.setTimeout( function(){
				this.fire( 'saveSnapshot' );
			}, 0, this );
		}
	}

	// DOM modification here should not bother dirty flag.(#4385)
	function restoreDirty( editor )
	{
		if ( !editor.checkDirty() )
			setTimeout( function(){ editor.resetDirty(); }, 0 );
	}

	var isNotWhitespace = CKEDITOR.dom.walker.whitespaces( true ),
		isNotBookmark = CKEDITOR.dom.walker.bookmark( false, true );

	function isNotEmpty( node )
	{
		return isNotWhitespace( node ) && isNotBookmark( node );
	}

	function isNbsp( node )
	{
		return node.type == CKEDITOR.NODE_TEXT
			   && CKEDITOR.tools.trim( node.getText() ).match( /^(?:&nbsp;|\xa0)$/ );
	}

	function restoreSelection( selection )
	{
		if ( selection.isLocked )
		{
			selection.unlock();
			setTimeout( function() { selection.lock(); }, 0 );
		}
	}

	function isBlankParagraph( block )
	{
		return block.getOuterHtml().match( emptyParagraphRegexp );
	}

	isNotWhitespace = CKEDITOR.dom.walker.whitespaces( true );

	// Gecko need a key event to 'wake up' the editing
	// ability when document is empty.(#3864, #5781)
	function activateEditing( editor )
	{
		var win = editor.window,
			doc = editor.document,
			body = editor.document.getBody(),
			bodyChildsNum = body.getChildren().count();

		if ( !bodyChildsNum || ( bodyChildsNum == 1&& body.getFirst().hasAttribute( '_moz_editor_bogus_node' ) ) )
		{
			restoreDirty( editor );

			// Memorize scroll position to restore it later (#4472).
			var hostDocument = editor.element.getDocument();
			var hostDocumentElement = hostDocument.getDocumentElement();
			var scrollTop = hostDocumentElement.$.scrollTop;
			var scrollLeft = hostDocumentElement.$.scrollLeft;

			// Simulating keyboard character input by dispatching a keydown of white-space text.
			var keyEventSimulate = doc.$.createEvent( "KeyEvents" );
			keyEventSimulate.initKeyEvent( 'keypress', true, true, win.$, false,
				false, false, false, 0, 32 );
			doc.$.dispatchEvent( keyEventSimulate );

			if ( scrollTop != hostDocumentElement.$.scrollTop || scrollLeft != hostDocumentElement.$.scrollLeft )
				hostDocument.getWindow().$.scrollTo( scrollLeft, scrollTop );

			// Restore the original document status by placing the cursor before a bogus br created (#5021).
			bodyChildsNum && body.getFirst().remove();
			doc.getBody().appendBogus();
			var nativeRange = new CKEDITOR.dom.range( doc );
			nativeRange.setStartAt( body , CKEDITOR.POSITION_AFTER_START );
			nativeRange.select();
		}
	}

	/**
	 *  Auto-fixing block-less content by wrapping paragraph (#3190), prevent
	 *  non-exitable-block by padding extra br.(#3189)
	 */
	function onSelectionChangeFixBody( evt )
	{
		var editor = evt.editor,
			path = evt.data.path,
			blockLimit = path.blockLimit,
			selection = evt.data.selection,
			range = selection.getRanges()[0],
			body = editor.document.getBody(),
			enterMode = editor.config.enterMode;

		CKEDITOR.env.gecko && activateEditing( editor );

		// When enterMode set to block, we'll establing new paragraph only if we're
		// selecting inline contents right under body. (#3657)
		if ( enterMode != CKEDITOR.ENTER_BR
		     && range.collapsed
			 && blockLimit.getName() == 'body'
			 && !path.block )
		{
			editor.fire( 'updateSnapshot' );
			restoreDirty( editor );
			CKEDITOR.env.ie && restoreSelection( selection );

			var fixedBlock = range.fixBlock( true,
					editor.config.enterMode == CKEDITOR.ENTER_DIV ? 'div' : 'p'  );

			// For IE, we should remove any filler node which was introduced before.
			if ( CKEDITOR.env.ie )
			{
				var first = fixedBlock.getFirst( isNotEmpty );
				first && isNbsp( first ) && first.remove();
			}

			// If the fixed block is actually blank and is already followed by an exitable blank
			// block, we should revert the fix and move into the existed one. (#3684)
			if ( isBlankParagraph( fixedBlock ) )
			{
				var element = fixedBlock.getNext( isNotWhitespace );
				if ( element &&
					 element.type == CKEDITOR.NODE_ELEMENT &&
					 !nonExitableElementNames[ element.getName() ] )
				{
					range.moveToElementEditStart( element );
					fixedBlock.remove();
				}
				else
				{
					element = fixedBlock.getPrevious( isNotWhitespace );
					if ( element &&
						 element.type == CKEDITOR.NODE_ELEMENT &&
						 !nonExitableElementNames[ element.getName() ] )
					{
						range.moveToElementEditEnd( element );
						fixedBlock.remove();
					}
				}
			}

			range.select();
			// Notify non-IE that selection has changed.
			if ( !CKEDITOR.env.ie )
				editor.selectionChange();
		}

		// All browsers are incapable to moving cursor out of certain non-exitable
		// blocks (e.g. table, list, pre) at the end of document, make this happen by
		// place a bogus node there, which would be later removed by dataprocessor.
		var walkerRange = new CKEDITOR.dom.range( editor.document ),
			walker = new CKEDITOR.dom.walker( walkerRange );
		walkerRange.selectNodeContents( body );
		walker.evaluator = function( node )
		{
			return node.type == CKEDITOR.NODE_ELEMENT && ( node.getName() in nonExitableElementNames );
		};
		walker.guard = function( node, isMoveout )
		{
			return !( ( node.type == CKEDITOR.NODE_TEXT && isNotWhitespace( node ) ) || isMoveout );
		};

		if ( walker.previous() )
		{
			editor.fire( 'updateSnapshot' );
			restoreDirty( editor );
			CKEDITOR.env.ie && restoreSelection( selection );

			var paddingBlock;
			if ( enterMode != CKEDITOR.ENTER_BR )
				paddingBlock = body.append( new CKEDITOR.dom.element( enterMode == CKEDITOR.ENTER_P ? 'p' : 'div' ) );
			else
				paddingBlock = body;

			if ( !CKEDITOR.env.ie )
				paddingBlock.appendBogus();
		}
	}

	CKEDITOR.plugins.add( 'wysiwygarea',
	{
		requires : [ 'editingblock' ],

		init : function( editor )
		{
			var fixForBody = ( editor.config.enterMode != CKEDITOR.ENTER_BR )
				? editor.config.enterMode == CKEDITOR.ENTER_DIV ? 'div' : 'p' : false;

			var frameLabel = editor.lang.editorTitle.replace( '%1', editor.name );

			var contentDomReadyHandler;
			editor.on( 'editingBlockReady', function()
				{
					var mainElement,
						iframe,
						isLoadingData,
						isPendingFocus,
						frameLoaded,
						fireMode;


					// Support for custom document.domain in IE.
					var isCustomDomain = CKEDITOR.env.isCustomDomain();

					// Creates the iframe that holds the editable document.
					var createIFrame = function( data )
					{
						if ( iframe )
							iframe.remove();


						var srcScript =
							'document.open();' +

							// The document domain must be set any time we
							// call document.open().
							( isCustomDomain ? ( 'document.domain="' + document.domain + '";' ) : '' ) +

							'document.close();';

						iframe = CKEDITOR.dom.element.createFromHtml( '<iframe' +
  							' style="width:100%;height:100%"' +
  							' frameBorder="0"' +
  							' title="' + frameLabel + '"' +
							// With IE, the custom domain has to be taken care at first,
							// for other browers, the 'src' attribute should be left empty to
							// trigger iframe's 'load' event.
  							' src="' + ( CKEDITOR.env.ie ? 'javascript:void(function(){' + encodeURIComponent( srcScript ) + '}())' : '' ) + '"' +
							' tabIndex="' + ( CKEDITOR.env.webkit? -1 : editor.tabIndex ) + '"' +
  							' allowTransparency="true"' +
  							'></iframe>' );

						// Running inside of Firefox chrome the load event doesn't bubble like in a normal page (#5689)
						if ( document.location.protocol == 'chrome:' )
							CKEDITOR.event.useCapture = true;

						// With FF, it's better to load the data on iframe.load. (#3894,#4058)
						iframe.on( 'load', function( ev )
							{
								frameLoaded = 1;
								ev.removeListener();

								var doc = iframe.getFrameDocument().$;

								// Don't leave any history log in IE. (#5657)
								doc.open( "text/html","replace" );
								doc.write( data );
								doc.close();
							});

						// Reset adjustment back to default (#5689)
						if ( document.location.protocol == 'chrome:' )
							CKEDITOR.event.useCapture = false;

						// The container must be visible when creating the iframe in FF (#5956)
						var element = editor.element,
							isHidden = CKEDITOR.env.gecko && !element.isVisible(),
							previousStyles = {};
						if ( isHidden )
						{
							element.show();
							previousStyles = {
								position : element.getStyle( 'position' ),
								top : element.getStyle( 'top' )
							};
							element.setStyles( { position : 'absolute', top : '-3000px' } );
						}

						mainElement.append( iframe );

						if ( isHidden )
						{
							setTimeout( function()
							{
								element.hide();
								element.setStyles( previousStyles );
							}, 1000 );
						}
					};

					// The script that launches the bootstrap logic on 'domReady', so the document
					// is fully editable even before the editing iframe is fully loaded (#4455).
					contentDomReadyHandler = CKEDITOR.tools.addFunction( contentDomReady );
					var activationScript =
						'<script id="cke_actscrpt" type="text/javascript" cke_temp="1">' +
							( isCustomDomain ? ( 'document.domain="' + document.domain + '";' ) : '' ) +
							'window.parent.CKEDITOR.tools.callFunction( ' + contentDomReadyHandler + ', window );' +
						'</script>';

					// Editing area bootstrap code.
					function contentDomReady( domWindow )
					{
						if ( !frameLoaded )
							return;
						frameLoaded = 0;

						editor.fire( 'ariaWidget', iframe );

						var domDocument = domWindow.document,
							body = domDocument.body;

						// Remove this script from the DOM.
						var script = domDocument.getElementById( "cke_actscrpt" );
						script.parentNode.removeChild( script );

						body.spellcheck = !editor.config.disableNativeSpellChecker;

						if ( CKEDITOR.env.ie )
						{
							// Don't display the focus border.
							body.hideFocus = true;

							// Disable and re-enable the body to avoid IE from
							// taking the editing focus at startup. (#141 / #523)
							body.disabled = true;
							body.contentEditable = true;
							body.removeAttribute( 'disabled' );
						}
						else
						{
							// Avoid opening design mode in a frame window thread,
							// which will cause host page scrolling.(#4397)
							setTimeout( function()
							{
								// Prefer 'contentEditable' instead of 'designMode'. (#3593)
								if ( CKEDITOR.env.gecko && CKEDITOR.env.version >= 10900
										|| CKEDITOR.env.opera )
									domDocument.$.body.contentEditable = true;
								else if ( CKEDITOR.env.webkit )
									domDocument.$.body.parentNode.contentEditable = true;
								else
									domDocument.$.designMode = 'on';
							}, 0 );
						}

						CKEDITOR.env.gecko && CKEDITOR.tools.setTimeout( activateEditing, 0, null, editor );

						domWindow	= editor.window		= new CKEDITOR.dom.window( domWindow );
						domDocument	= editor.document	= new CKEDITOR.dom.document( domDocument );

						domDocument.on( 'dblclick', function( evt )
						{
							var element = evt.data.getTarget(),
								data = { element : element, dialog : '' };
							editor.fire( 'doubleclick', data );
							data.dialog && editor.openDialog( data.dialog );
						});

						// Gecko/Webkit need some help when selecting control type elements. (#3448)
						if ( !( CKEDITOR.env.ie || CKEDITOR.env.opera) )
						{
							domDocument.on( 'mousedown', function( ev )
							{
								var control = ev.data.getTarget();
								if ( control.is( 'img', 'hr', 'input', 'textarea', 'select' ) )
									editor.getSelection().selectElement( control );
							} );
						}

						if ( CKEDITOR.env.gecko )
						{
							domDocument.on( 'mouseup', function( ev )
							{
								if ( ev.data.$.button == 2 )
								{
									var target = ev.data.getTarget();

									// Prevent right click from selecting an empty block even
									// when selection is anchored inside it. (#5845)
									if ( !target.getOuterHtml().replace( emptyParagraphRegexp, '' ) )
									{
										var range = new CKEDITOR.dom.range( domDocument );
										range.moveToElementEditStart( target );
										range.select( true );
									}
								}
							} );
						}

						// Prevent the browser opening links in read-only blocks. (#6032)
						domDocument.on( 'click', function( ev )
							{
								ev = ev.data;
								if ( ev.getTarget().is( 'a' ) && ev.$.button != 2 )
									ev.preventDefault();
							});

						// Webkit: avoid from editing form control elements content.
						if ( CKEDITOR.env.webkit )
						{
							// Prevent from tick checkbox/radiobox/select
							domDocument.on( 'click', function( ev )
							{
								if ( ev.data.getTarget().is( 'input', 'select' ) )
									ev.data.preventDefault();
							} );

							// Prevent from editig textfield/textarea value.
							domDocument.on( 'mouseup', function( ev )
							{
								if ( ev.data.getTarget().is( 'input', 'textarea' ) )
									ev.data.preventDefault();
							} );
						}

						// IE standard compliant in editing frame doesn't focus the editor when
						// clicking outside actual content, manually apply the focus. (#1659)
						if ( CKEDITOR.env.ie
							&& domDocument.$.compatMode == 'CSS1Compat'
								|| CKEDITOR.env.gecko
								|| CKEDITOR.env.opera )
						{
							var htmlElement = domDocument.getDocumentElement();
							htmlElement.on( 'mousedown', function( evt )
							{
								// Setting focus directly on editor doesn't work, we
								// have to use here a temporary element to 'redirect'
								// the focus.
								if ( evt.data.getTarget().equals( htmlElement ) )
								{
									if ( CKEDITOR.env.gecko && CKEDITOR.env.version >= 10900 )
										blinkCursor();
									focusGrabber.focus();
								}
							} );
						}

						domWindow.on( 'blur', function()
							{
								editor.focusManager.blur();
							});

						domWindow.on( 'focus', function()
							{
								var doc = editor.document;

								if ( CKEDITOR.env.gecko && CKEDITOR.env.version >= 10900 )
									blinkCursor();
								else if ( CKEDITOR.env.opera )
									doc.getBody().focus();

								editor.focusManager.focus();
							});

						var keystrokeHandler = editor.keystrokeHandler;
						if ( keystrokeHandler )
							keystrokeHandler.attach( domDocument );

						if ( CKEDITOR.env.ie )
						{
							domDocument.getDocumentElement().addClass( domDocument.$.compatMode );
							// Override keystrokes which should have deletion behavior
							//  on control types in IE . (#4047)
							domDocument.on( 'keydown', function( evt )
							{
								var keyCode = evt.data.getKeystroke();

								// Backspace OR Delete.
								if ( keyCode in { 8 : 1, 46 : 1 } )
								{
									var sel = editor.getSelection(),
										control = sel.getSelectedElement();

									if ( control )
									{
										// Make undo snapshot.
										editor.fire( 'saveSnapshot' );

										// Delete any element that 'hasLayout' (e.g. hr,table) in IE8 will
										// break up the selection, safely manage it here. (#4795)
										var bookmark = sel.getRanges()[ 0 ].createBookmark();
										// Remove the control manually.
										control.remove();
										sel.selectBookmarks( [ bookmark ] );

										editor.fire( 'saveSnapshot' );

										evt.data.preventDefault();
									}
								}
							} );

							// PageUp/PageDown scrolling is broken in document
							// with standard doctype, manually fix it. (#4736)
							if ( domDocument.$.compatMode == 'CSS1Compat' )
							{
								var pageUpDownKeys = { 33 : 1, 34 : 1 };
								domDocument.on( 'keydown', function( evt )
								{
									if ( evt.data.getKeystroke() in pageUpDownKeys )
									{
										setTimeout( function ()
										{
											editor.getSelection().scrollIntoView();
										}, 0 );
									}
								} );
							}
						}

						// Adds the document body as a context menu target.
						if ( editor.contextMenu )
							editor.contextMenu.addTarget( domDocument, editor.config.browserContextMenuOnCtrl !== false );

						setTimeout( function()
							{
								editor.fire( 'contentDom' );

								if ( fireMode )
								{
									editor.mode = 'wysiwyg';
									editor.fire( 'mode' );
									fireMode = false;
								}

								isLoadingData = false;

								if ( isPendingFocus )
								{
									editor.focus();
									isPendingFocus = false;
								}
								setTimeout( function()
								{
									editor.fire( 'dataReady' );
								}, 0 );

								// IE, Opera and Safari may not support it and throw errors.
								try { editor.document.$.execCommand( 'enableObjectResizing', false, !editor.config.disableObjectResizing ) ; } catch(e) {}
								try { editor.document.$.execCommand( 'enableInlineTableEditing', false, !editor.config.disableNativeTableHandles ) ; } catch(e) {}

								/*
								 * IE BUG: IE might have rendered the iframe with invisible contents.
								 * (#3623). Push some inconsequential CSS style changes to force IE to
								 * refresh it.
								 *
								 * Also, for some unknown reasons, short timeouts (e.g. 100ms) do not
								 * fix the problem. :(
								 */
								if ( CKEDITOR.env.ie )
								{
									setTimeout( function()
										{
											if ( editor.document )
											{
												var $body = editor.document.$.body;
												$body.runtimeStyle.marginBottom = '0px';
												$body.runtimeStyle.marginBottom = '';
											}
										}, 1000 );
								}
							},
							0 );
					}

					editor.addMode( 'wysiwyg',
						{
							load : function( holderElement, data, isSnapshot )
							{
								mainElement = holderElement;

								if ( CKEDITOR.env.ie && CKEDITOR.env.quirks )
									holderElement.setStyle( 'position', 'relative' );

								// The editor data "may be dirty" after this
								// point.
								editor.mayBeDirty = true;

								fireMode = true;

								if ( isSnapshot )
									this.loadSnapshotData( data );
								else
									this.loadData( data );
							},

							loadData : function( data )
							{
								isLoadingData = true;

								var config = editor.config,
									fullPage = config.fullPage,
									docType = config.docType;

								// Build the additional stuff to be included into <head>.
								var headExtra =
									'<style type="text/css" cke_temp="1">' +
										editor._.styles.join( '\n' ) +
									'</style>';

								!fullPage && ( headExtra =
									CKEDITOR.tools.buildStyleHtml( editor.config.contentsCss ) +
									headExtra );

								var baseTag = config.baseHref ? '<base href="' + config.baseHref + '" cke_temp="1" />' : '';

								if ( fullPage )
								{
									// Search and sweep out the doctype declaration.
									data = data.replace( /<!DOCTYPE[^>]*>/i, function( match )
										{
											editor.docType = docType = match;
											return '';
										});
								}

								// Get the HTML version of the data.
								if ( editor.dataProcessor )
									data = editor.dataProcessor.toHtml( data, fixForBody );

								if ( fullPage )
								{
									// Check if the <body> tag is available.
									if ( !(/<body[\s|>]/).test( data ) )
										data = '<body>' + data;

									// Check if the <html> tag is available.
									if ( !(/<html[\s|>]/).test( data ) )
										data = '<html>' + data + '</html>';

									// Check if the <head> tag is available.
									if ( !(/<head[\s|>]/).test( data ) )
										data = data.replace( /<html[^>]*>/, '$&<head><title></title></head>' ) ;
									else if ( !(/<title[\s|>]/).test( data ) )
										data = data.replace( /<head[^>]*>/, '$&<title></title>' ) ;

									// The base must be the first tag in the HEAD, e.g. to get relative
									// links on styles.
									baseTag && ( data = data.replace( /<head>/, '$&' + baseTag ) );

									// Inject the extra stuff into <head>.
									// Attention: do not change it before testing it well. (V2)
									// This is tricky... if the head ends with <meta ... content type>,
									// Firefox will break. But, it works if we place our extra stuff as
									// the last elements in the HEAD.
									data = data.replace( /<\/head\s*>/, headExtra + '$&' );

									// Add the DOCTYPE back to it.
									data = docType + data;
								}
								else
								{
									data =
										config.docType +
										'<html dir="' + config.contentsLangDirection + '"' +
											' lang="' + ( config.contentsLanguage || editor.langCode ) + '">' +
										'<head>' +
											'<title>' + frameLabel + '</title>' +
											baseTag +
											headExtra +
										'</head>' +
										'<body' + ( config.bodyId ? ' id="' + config.bodyId + '"' : '' ) +
												  ( config.bodyClass ? ' class="' + config.bodyClass + '"' : '' ) +
												  '>' +
											data +
										'</html>';
								}

								data += activationScript;


								// The iframe is recreated on each call of setData, so we need to clear DOM objects
								this.onDispose();
								createIFrame( data );
							},

							getData : function()
							{
								var config = editor.config,
									fullPage = config.fullPage,
									docType = fullPage && editor.docType,
									doc = iframe.getFrameDocument();

								var data = fullPage
									? doc.getDocumentElement().getOuterHtml()
									: doc.getBody().getHtml();

								if ( editor.dataProcessor )
									data = editor.dataProcessor.toDataFormat( data, fixForBody );

								// Strip the last blank paragraph within document.
								if ( config.ignoreEmptyParagraph )
									data = data.replace( emptyParagraphRegexp, '' );

								if ( docType )
									data = docType + '\n' + data;

								return data;
							},

							getSnapshotData : function()
							{
								return iframe.getFrameDocument().getBody().getHtml();
							},

							loadSnapshotData : function( data )
							{
								iframe.getFrameDocument().getBody().setHtml( data );
							},

							onDispose : function()
							{
								if ( !editor.document )
									return;

								editor.document.getDocumentElement().clearCustomData();
								editor.document.getBody().clearCustomData();

								editor.window.clearCustomData();
								editor.document.clearCustomData();

								iframe.clearCustomData();

								/*
								* IE BUG: When destroying editor DOM with the selection remains inside
								* editing area would break IE7/8's selection system, we have to put the editing
								* iframe offline first. (#3812 and #5441)
								*/
								iframe.remove();
							},

							unload : function( holderElement )
							{
								this.onDispose();

								editor.window = editor.document = iframe = mainElement = isPendingFocus = null;

								editor.fire( 'contentDomUnload' );
							},

							focus : function()
							{
								if ( isLoadingData )
									isPendingFocus = true;
								// Temporary solution caused by #6025, supposed be unified by #6154.
								else if ( CKEDITOR.env.opera && editor.document )
								{
									editor.document.getBody().focus();

									editor.selectionChange();
								}
								else if ( !CKEDITOR.env.opera && editor.window )
								{
									editor.window.focus();

									editor.selectionChange();
								}
							}
						});

					editor.on( 'insertHtml', onInsertHtml, null, null, 20 );
					editor.on( 'insertElement', onInsertElement, null, null, 20 );
					// Auto fixing on some document structure weakness to enhance usabilities. (#3190 and #3189)
					editor.on( 'selectionChange', onSelectionChangeFixBody, null, null, 1 );
				});

			var titleBackup;
			// Setting voice label as window title, backup the original one
			// and restore it before running into use.
			editor.on( 'contentDom', function ()
				{
					var title = editor.document.getElementsByTag( 'title' ).getItem( 0 );
					title.setAttribute( '_cke_title', editor.document.$.title );
					editor.document.$.title = frameLabel;
				});

			// IE8 stricts mode doesn't have 'contentEditable' in effect
			// on element unless it has layout. (#5562)
			if ( CKEDITOR.env.ie8Compat )
			{
				editor.addCss( 'html.CSS1Compat [contenteditable=false]{ min-height:0 !important;}' );

				var selectors = [];
				for ( var tag in CKEDITOR.dtd.$removeEmpty )
					selectors.push( 'html.CSS1Compat ' + tag + '[contenteditable=false]' );
				editor.addCss( selectors.join( ',' ) + '{ display:inline-block;}' );
			}

			// Switch on design mode for a short while and close it after then.
			function blinkCursor( retry )
			{
				CKEDITOR.tools.tryThese(
					function()
					{
						editor.document.$.designMode = 'on';
						setTimeout( function ()
						{
							editor.document.$.designMode = 'off';
							editor.document.getBody().focus();
						}, 50 );
					},
					function()
					{
						// The above call is known to fail when parent DOM
						// tree layout changes may break design mode. (#5782)
						// Refresh the 'contentEditable' is a cue to this.
						editor.document.$.designMode = 'off';
						var body = editor.document.getBody();
						body.setAttribute( 'contentEditable', false );
						body.setAttribute( 'contentEditable', true );
						// Try it again once..
						!retry && blinkCursor( 1 );
					});
			}

			// Create an invisible element to grab focus.
			if ( CKEDITOR.env.gecko || CKEDITOR.env.ie || CKEDITOR.env.opera )
			{
				var focusGrabber;
				editor.on( 'uiReady', function()
				{
					focusGrabber = editor.container.append( CKEDITOR.dom.element.createFromHtml(
						// Use 'span' instead of anything else to fly under the screen-reader radar. (#5049)
						'<span tabindex="-1" style="position:absolute; left:-10000" role="presentation"></span>' ) );

					focusGrabber.on( 'focus', function()
						{
							editor.focus();
						} );
				} );
				editor.on( 'destroy', function()
				{
					CKEDITOR.tools.removeFunction( contentDomReadyHandler );
					focusGrabber.clearCustomData();
				} );
			}

			// Disable form elements editing mode provided by some browers. (#5746)
			editor.on( 'insertElement', function ( evt )
			{
				var element = evt.data;
				if ( element.type == CKEDITOR.NODE_ELEMENT
						&& ( element.is( 'input' ) || element.is( 'textarea' ) ) )
				{
					if ( !element.isReadOnly() )
					{
						element.setAttribute( 'contentEditable', false );
						// We should flag that the element was locked by our code so
						// it'll be editable by the editor functions (#6046).
						element.setCustomData( '_cke_notReadOnly', 1 );
					}
				}
			});

		}
	});

	// Fixing Firefox 'Back-Forward Cache' break design mode. (#4514)
	if ( CKEDITOR.env.gecko )
	{
		( function ()
		{
			var body = document.body;

			if ( !body )
				window.addEventListener( 'load', arguments.callee, false );
			else
			{
				var currentHandler = body.getAttribute( 'onpageshow' );
				body.setAttribute( 'onpageshow', ( currentHandler ? currentHandler + ';' : '') +
							'event.persisted && (function(){' +
								'var allInstances = CKEDITOR.instances, editor, doc;' +
								'for ( var i in allInstances )' +
								'{' +
								'	editor = allInstances[ i ];' +
								'	doc = editor.document;' +
								'	if ( doc )' +
								'	{' +
								'		doc.$.designMode = "off";' +
								'		doc.$.designMode = "on";' +
								'	}' +
								'}' +
						'})();' );
			}
		} )();

	}
})();

/**
 * Disables the ability of resize objects (image and tables) in the editing
 * area.
 * @type Boolean
 * @default false
 * @example
 * config.disableObjectResizing = true;
 */
CKEDITOR.config.disableObjectResizing = false;

/**
 * Disables the "table tools" offered natively by the browser (currently
 * Firefox only) to make quick table editing operations, like adding or
 * deleting rows and columns.
 * @type Boolean
 * @default true
 * @example
 * config.disableNativeTableHandles = false;
 */
CKEDITOR.config.disableNativeTableHandles = true;

/**
 * Disables the built-in spell checker while typing natively available in the
 * browser (currently Firefox and Safari only).<br /><br />
 *
 * Even if word suggestions will not appear in the CKEditor context menu, this
 * feature is useful to help quickly identifying misspelled words.<br /><br />
 *
 * This setting is currently compatible with Firefox only due to limitations in
 * other browsers.
 * @type Boolean
 * @default true
 * @example
 * config.disableNativeSpellChecker = false;
 */
CKEDITOR.config.disableNativeSpellChecker = true;

/**
 * Whether the editor must output an empty value ("") if it's contents is made
 * by an empty paragraph only.
 * @type Boolean
 * @default true
 * @example
 * config.ignoreEmptyParagraph = false;
 */
CKEDITOR.config.ignoreEmptyParagraph = true;

/**
 * Fired when data is loaded and ready for retrieval in an editor instance.
 * @name CKEDITOR.editor#dataReady
 * @event
 */
