/**
 * @license Highcharts JS v6.0.3 (2017-11-14)
 *
 * (c) 2016 Highsoft AS
 * Authors: Jon Arild Nygard
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function(factory) {
    if (typeof module === 'object' && module.exports) {
        module.exports = factory;
    } else {
        factory(Highcharts);
    }
}(function(Highcharts) {
    (function(H) {
        /**
         * (c) 2010-2017 Torstein Honsi
         *
         * License: www.highcharts.com/license
         */
        var deg2rad = H.deg2rad,
            isNumber = H.isNumber,
            pick = H.pick,
            relativeLength = H.relativeLength;
        H.CenteredSeriesMixin = {
            /**
             * Get the center of the pie based on the size and center options relative to the
             * plot area. Borrowed by the polar and gauge series types.
             */
            getCenter: function() {

                var options = this.options,
                    chart = this.chart,
                    slicingRoom = 2 * (options.slicedOffset || 0),
                    handleSlicingRoom,
                    plotWidth = chart.plotWidth - 2 * slicingRoom,
                    plotHeight = chart.plotHeight - 2 * slicingRoom,
                    centerOption = options.center,
                    positions = [pick(centerOption[0], '50%'), pick(centerOption[1], '50%'), options.size || '100%', options.innerSize || 0],
                    smallestSize = Math.min(plotWidth, plotHeight),
                    i,
                    value;

                for (i = 0; i < 4; ++i) {
                    value = positions[i];
                    handleSlicingRoom = i < 2 || (i === 2 && /%$/.test(value));

                    // i == 0: centerX, relative to width
                    // i == 1: centerY, relative to height
                    // i == 2: size, relative to smallestSize
                    // i == 3: innerSize, relative to size
                    positions[i] = relativeLength(value, [plotWidth, plotHeight, smallestSize, positions[2]][i]) +
                        (handleSlicingRoom ? slicingRoom : 0);

                }
                // innerSize cannot be larger than size (#3632)
                if (positions[3] > positions[2]) {
                    positions[3] = positions[2];
                }
                return positions;
            },
            /**
             * getStartAndEndRadians - Calculates start and end angles in radians.
             * Used in series types such as pie and sunburst.
             *
             * @param  {Number} start Start angle in degrees.
             * @param  {Number} end Start angle in degrees.
             * @return {object} Returns an object containing start and end angles as
             * radians.
             */
            getStartAndEndRadians: function getStartAndEndRadians(start, end) {
                var startAngle = isNumber(start) ? start : 0, // must be a number
                    endAngle = (
                        (
                            isNumber(end) && // must be a number
                            end > startAngle && // must be larger than the start angle
                            // difference must be less than 360 degrees
                            (end - startAngle) < 360
                        ) ?
                        end :
                        startAngle + 360
                    ),
                    correction = -90;
                return {
                    start: deg2rad * (startAngle + correction),
                    end: deg2rad * (endAngle + correction)
                };
            }
        };

    }(Highcharts));
    var draw = (function() {
        var isFn = function(x) {
            return typeof x === 'function';
        };

        /**
         * draw - Handles the drawing of a point.
         * TODO: add type checking.
         *
         * @param  {object} params Parameters.
         * @return {undefined} Returns undefined.
         */
        var draw = function draw(params) {
            var point = this,
                graphic = point.graphic,
                animate = params.animate,
                attr = params.attr,
                onComplete = params.onComplete,
                css = params.css,
                group = params.group,
                renderer = params.renderer,
                shape = params.shapeArgs,
                type = params.shapeType;

            if (point.shouldDraw()) {
                if (!graphic) {
                    point.graphic = graphic = renderer[type](shape).add(group);
                }
                graphic.css(css).attr(attr).animate(animate, undefined, onComplete);
            } else if (graphic) {
                graphic.animate(animate, undefined, function() {
                    point.graphic = graphic = graphic.destroy();
                    if (isFn(onComplete)) {
                        onComplete();
                    }
                });
            }
            if (graphic) {
                graphic.addClass(point.getClassName(), true);
            }
        };
        return draw;
    }());
    var result = (function(H) {
        var each = H.each,
            extend = H.extend,
            isBoolean = function(x) {
                return typeof x === 'boolean';
            },
            isFn = function(x) {
                return typeof x === 'function';
            },
            pick = H.pick;
        // TODO Combine buildTree and buildNode with setTreeValues
        // TODO Remove logic from Treemap and make it utilize this mixin.
        var setTreeValues = function setTreeValues(tree, options) {
            var before = options.before,
                idRoot = options.idRoot,
                mapIdToNode = options.mapIdToNode,
                nodeRoot = mapIdToNode[idRoot],
                levelIsConstant = (
                    isBoolean(options.levelIsConstant) ?
                    options.levelIsConstant :
                    true
                ),
                points = options.points,
                point = points[tree.i],
                optionsPoint = point && point.options || {},
                childrenTotal = 0,
                children = [],
                value;
            extend(tree, {
                levelDynamic: tree.level - (levelIsConstant ? 0 : nodeRoot.level),
                name: pick(point && point.name, ''),
                visible: (
                    idRoot === tree.id ||
                    (isBoolean(options.visible) ? options.visible : false)
                )
            });
            if (isFn(before)) {
                tree = before(tree, options);
            }
            // First give the children some values
            each(tree.children, function(child, i) {
                var newOptions = extend({}, options);
                extend(newOptions, {
                    index: i,
                    siblings: tree.children.length,
                    visible: tree.visible
                });
                child = setTreeValues(child, newOptions);
                children.push(child);
                if (child.visible) {
                    childrenTotal += child.val;
                }
            });
            tree.visible = childrenTotal > 0 || tree.visible;
            // Set the values
            value = pick(optionsPoint.value, childrenTotal);
            extend(tree, {
                children: children,
                childrenTotal: childrenTotal,
                isLeaf: tree.visible && !childrenTotal,
                val: value
            });
            return tree;
        };

        var getColor = function getColor(node, options) {
            var index = options.index,
                levelMap = options.levelMap,
                parentColor = options.parentColor,
                parentColorIndex = options.parentColorIndex,
                series = options.series,
                colors = options.colors,
                siblings = options.siblings,
                points = series.points,
                getColorByPoint,
                point,
                level,
                colorByPoint,
                colorIndexByPoint,
                color,
                colorIndex;

            function variation(color) {
                var colorVariation = level && level.colorVariation;
                if (colorVariation) {
                    if (colorVariation.key === 'brightness') {
                        return H.color(color).brighten(
                            colorVariation.to * (index / siblings)
                        ).get();
                    }
                }

                return color;
            }

            if (node) {
                point = points[node.i];
                level = levelMap[node.levelDynamic] || {};
                getColorByPoint = (
                    point &&
                    (
                        isBoolean(level.colorByPoint) ?
                        level.colorByPoint :
                        !!series.options.colorByPoint
                    )
                );

                if (getColorByPoint) {
                    colorIndexByPoint = point.index %
                        (colors ? colors.length : series.chart.options.chart.colorCount);
                    colorByPoint = colors && colors[colorIndexByPoint];
                }


                // Select either point color, level color or inherited color.
                color = pick(
                    point && point.options.color,
                    level && level.color,
                    colorByPoint,
                    parentColor && variation(parentColor),
                    series.color
                );

                colorIndex = pick(
                    point && point.options.colorIndex,
                    level && level.colorIndex,
                    colorIndexByPoint,
                    parentColorIndex,
                    options.colorIndex
                );
            }
            return {
                color: color,
                colorIndex: colorIndex
            };
        };

        var result = {
            getColor: getColor,
            setTreeValues: setTreeValues
        };
        return result;
    }(Highcharts));
    (function(H, mixinTreeSeries) {
        /**
         * (c) 2014 Highsoft AS
         * Authors: Jon Arild Nygard / Oystein Moseng
         *
         * License: www.highcharts.com/license
         */

        var seriesType = H.seriesType,
            seriesTypes = H.seriesTypes,
            map = H.map,
            merge = H.merge,
            extend = H.extend,
            noop = H.noop,
            each = H.each,
            getColor = mixinTreeSeries.getColor,
            grep = H.grep,
            isBoolean = function(x) {
                return typeof x === 'boolean';
            },
            isNumber = H.isNumber,
            isString = H.isString,
            pick = H.pick,
            Series = H.Series,
            stableSort = H.stableSort,
            color = H.Color,
            eachObject = function(list, func, context) {
                context = context || this;
                H.objectEach(list, function(val, key) {
                    func.call(context, val, key, list);
                });
            },
            reduce = H.reduce,
            // @todo find correct name for this function. 
            // @todo Similar to reduce, this function is likely redundant
            recursive = function(item, func, context) {
                var next;
                context = context || this;
                next = func.call(context, item);
                if (next !== false) {
                    recursive(next, func, context);
                }
            };

        /**
         * A treemap displays hierarchical data using nested rectangles. The data can be
         * laid out in varying ways depending on options.
         *
         * @sample highcharts/demo/treemap-large-dataset/ Treemap
         * 
         * @extends {plotOptions.scatter}
         * @excluding marker
         * @product highcharts
         * @optionparent plotOptions.treemap
         */
        seriesType('treemap', 'scatter', {

            /**
             * When enabled the user can click on a point which is a parent and
             * zoom in on its children.
             * 
             * @type {Boolean}
             * @sample {highcharts} highcharts/plotoptions/treemap-allowdrilltonode/ Enabled
             * @default false
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.allowDrillToNode
             */

            /**
             * When the series contains less points than the crop threshold, all
             * points are drawn, event if the points fall outside the visible plot
             * area at the current zoom. The advantage of drawing all points (including
             * markers and columns), is that animation is performed on updates.
             * On the other hand, when the series contains more points than the
             * crop threshold, the series data is cropped to only contain points
             * that fall within the plot area. The advantage of cropping away invisible
             * points is to increase performance on large series.
             * 
             * @type {Number}
             * @default 300
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.cropThreshold
             */

            /**
             * This option decides if the user can interact with the parent nodes
             * or just the leaf nodes. When this option is undefined, it will be
             * true by default. However when allowDrillToNode is true, then it will
             * be false by default.
             * 
             * @type {Boolean}
             * @sample {highcharts} highcharts/plotoptions/treemap-interactbyleaf-false/ False
             * @sample {highcharts} highcharts/plotoptions/treemap-interactbyleaf-true-and-allowdrilltonode/ InteractByLeaf and allowDrillToNode is true
             * @since 4.1.2
             * @product highcharts
             * @apioption plotOptions.treemap.interactByLeaf
             */

            /**
             * The sort index of the point inside the treemap level.
             * 
             * @type {Number}
             * @sample {highcharts} highcharts/plotoptions/treemap-sortindex/ Sort by years
             * @since 4.1.10
             * @product highcharts
             * @apioption plotOptions.treemap.sortIndex
             */

            /**
             * Whether to display this series type or specific series item in the
             * legend.
             * 
             * @type {Boolean}
             * @default false
             * @product highcharts
             */
            showInLegend: false,

            /**
             * @ignore
             */
            marker: false,

            /**
             * @extends plotOptions.heatmap.dataLabels
             * @since 4.1.0
             * @product highcharts
             */
            dataLabels: {
                enabled: true,
                defer: false,
                verticalAlign: 'middle',
                formatter: function() { // #2945
                    return this.point.name || this.point.id;
                },
                inside: true
            },

            tooltip: {
                headerFormat: '',
                pointFormat: '<b>{point.name}</b>: {point.value}<br/>'
            },

            /**
             * Whether to ignore hidden points when the layout algorithm runs.
             * If `false`, hidden points will leave open spaces.
             * 
             * @type {Boolean}
             * @default true
             * @since 5.0.8
             * @product highcharts
             */
            ignoreHiddenPoint: true,

            /**
             * This option decides which algorithm is used for setting position
             * and dimensions of the points. Can be one of `sliceAndDice`, `stripes`,
             *  `squarified` or `strip`.
             * 
             * @validvalue ["sliceAndDice", "stripes", "squarified", "strip"]
             * @type {String}
             * @see [How to write your own algorithm](http://www.highcharts.com/docs/chart-
             * and-series-types/treemap)
             * @sample {highcharts} highcharts/plotoptions/treemap-layoutalgorithm-sliceanddice/ SliceAndDice by default
             * @sample {highcharts} highcharts/plotoptions/treemap-layoutalgorithm-stripes/ Stripes
             * @sample {highcharts} highcharts/plotoptions/treemap-layoutalgorithm-squarified/ Squarified
             * @sample {highcharts} highcharts/plotoptions/treemap-layoutalgorithm-strip/ Strip
             * @default sliceAndDice
             * @since 4.1.0
             * @product highcharts
             */
            layoutAlgorithm: 'sliceAndDice',

            /**
             * Defines which direction the layout algorithm will start drawing.
             *  Possible values are "vertical" and "horizontal".
             * 
             * @validvalue ["vertical", "horizontal"]
             * @type {String}
             * @default vertical
             * @since 4.1.0
             * @product highcharts
             */
            layoutStartingDirection: 'vertical',

            /**
             * Enabling this option will make the treemap alternate the drawing
             * direction between vertical and horizontal. The next levels starting
             * direction will always be the opposite of the previous.
             * 
             * @type {Boolean}
             * @sample {highcharts} highcharts/plotoptions/treemap-alternatestartingdirection-true/ Enabled
             * @default false
             * @since 4.1.0
             * @product highcharts
             */
            alternateStartingDirection: false,

            /**
             * Used together with the levels and allowDrillToNode options. When
             * set to false the first level visible when drilling is considered
             * to be level one. Otherwise the level will be the same as the tree
             * structure.
             * 
             * @type {Boolean}
             * @default true
             * @since 4.1.0
             * @product highcharts
             */
            levelIsConstant: true,

            /**
             * Options for the button appearing when drilling down in a treemap.
             */
            drillUpButton: {

                /**
                 * The position of the button.
                 */
                position: {

                    /**
                     * Horizontal alignment of the button.
                     * @validvalue ["left", "center", "right"]
                     */
                    align: 'right',

                    /**
                     * Horizontal offset of the button.
                     * @default -10
                     * @type {Number}
                     */
                    x: -10,

                    /**
                     * Vertical offset of the button.
                     */
                    y: 10

                    /**
                     * Vertical alignment of the button.
                     *
                     * @default top
                     * @validvalue ["top", "middle", "bottom"]
                     * @apioption plotOptions.treemap.drillUpButton.position.verticalAlign
                     */
                }
            },

            // Presentational options

            /**
             * The color of the border surrounding each tree map item.
             * 
             * @type {Color}
             * @default #e6e6e6
             * @product highcharts
             */
            borderColor: '#e6e6e6',

            /**
             * The width of the border surrounding each tree map item.
             */
            borderWidth: 1,

            /**
             * The opacity of a point in treemap. When a point has children, the
             * visibility of the children is determined by the opacity.
             * 
             * @type {Number}
             * @default 0.15
             * @since 4.2.4
             * @product highcharts
             */
            opacity: 0.15,

            /**
             * A wrapper object for all the series options in specific states.
             * 
             * @extends plotOptions.heatmap.states
             * @product highcharts
             */
            states: {

                /**
                 * Options for the hovered series
                 * 
                 * @extends plotOptions.heatmap.states.hover
                 * @excluding halo
                 * @product highcharts
                 */
                hover: {

                    /**
                     * The border color for the hovered state.
                     */
                    borderColor: '#999999',

                    /**
                     * Brightness for the hovered point. Defaults to 0 if the heatmap
                     * series is loaded, otherwise 0.1.
                     *
                     * @default null
                     * @type {Number}
                     */
                    brightness: seriesTypes.heatmap ? 0 : 0.1,
                    /**
                     * @extends plotOptions.heatmap.states.hover.halo
                     */
                    halo: false,
                    /**
                     * The opacity of a point in treemap. When a point has children,
                     * the visibility of the children is determined by the opacity.
                     * 
                     * @type {Number}
                     * @default 0.75
                     * @since 4.2.4
                     * @product highcharts
                     */
                    opacity: 0.75,

                    /**
                     * The shadow option for hovered state.
                     */
                    shadow: false
                }
            }



            /**
             * Set options on specific levels. Takes precedence over series options,
             * but not point options.
             * 
             * @type {Array<Object>}
             * @sample {highcharts} highcharts/plotoptions/treemap-levels/
             *         Styling dataLabels and borders
             * @sample {highcharts} highcharts/demo/treemap-with-levels/
             *         Different layoutAlgorithm
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels
             */

            /**
             * Can set a `borderColor` on all points which lies on the same level.
             * 
             * @type {Color}
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.borderColor
             */

            /**
             * Set the dash style of the border of all the point which lies on the
             * level. See <a href"#plotoptions.scatter.dashstyle">
             * plotOptions.scatter.dashStyle</a> for possible options.
             * 
             * @type {String}
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.borderDashStyle
             */

            /**
             * Can set the borderWidth on all points which lies on the same level.
             * 
             * @type {Number}
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.borderWidth
             */

            /**
             * Can set a color on all points which lies on the same level.
             * 
             * @type {Color}
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.color
             */

            /**
             * A configuration object to define how the color of a child varies from the
             * parent's color. The variation is distributed among the children of node.
             * For example when setting brightness, the brightness change will range
             * from the parent's original brightness on the first child, to the amount
             * set in the `to` setting on the last node. This allows a gradient-like
             * color scheme that sets children out from each other while highlighting
             * the grouping on treemaps and sectors on sunburst charts.
             * 
             * @type {Object}
             * @sample highcharts/demo/sunburst/ Sunburst with color variation
             * @since 6.0.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.colorVariation
             */

            /**
             * The key of a color variation. Currently supports `brightness` only.
             *  
             * @type {String}
             * @validvalue ["brightness"]
             * @since 6.0.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.colorVariation.key
             */

            /**
             * The ending value of a color variation. The last sibling will receive this
             * value.
             *  
             * @type {Number}
             * @since 6.0.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.colorVariation.to
             */

            /**
             * Can set the options of dataLabels on each point which lies on the
             * level. [plotOptions.treemap.dataLabels](#plotOptions.treemap.dataLabels)
             * for possible values.
             * 
             * @type {Object}
             * @default undefined
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.dataLabels
             */

            /**
             * Can set the layoutAlgorithm option on a specific level.
             * 
             * @validvalue ["sliceAndDice", "stripes", "squarified", "strip"]
             * @type {String}
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.layoutAlgorithm
             */

            /**
             * Can set the layoutStartingDirection option on a specific level.
             * 
             * @validvalue ["vertical", "horizontal"]
             * @type {String}
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.layoutStartingDirection
             */

            /**
             * Decides which level takes effect from the options set in the levels
             * object.
             * 
             * @type {Number}
             * @sample {highcharts} highcharts/plotoptions/treemap-levels/
             *         Styling of both levels
             * @since 4.1.0
             * @product highcharts
             * @apioption plotOptions.treemap.levels.level
             */

            // Prototype members
        }, {
            pointArrayMap: ['value'],
            axisTypes: seriesTypes.heatmap ? ['xAxis', 'yAxis', 'colorAxis'] : ['xAxis', 'yAxis'],
            directTouch: true,
            optionalAxis: 'colorAxis',
            getSymbol: noop,
            parallelArrays: ['x', 'y', 'value', 'colorValue'],
            colorKey: 'colorValue', // Point color option key
            translateColors: (
                seriesTypes.heatmap &&
                seriesTypes.heatmap.prototype.translateColors
            ),
            colorAttribs: (
                seriesTypes.heatmap &&
                seriesTypes.heatmap.prototype.colorAttribs
            ),
            trackerGroups: ['group', 'dataLabelsGroup'],
            /**
             * Creates an object map from parent id to childrens index.
             * @param {Array} data List of points set in options.
             * @param {string} data[].parent Parent id of point.
             * @param {Array} ids List of all point ids.
             * @return {Object} Map from parent id to children index in data.
             */
            getListOfParents: function(data, ids) {
                var listOfParents = reduce(data || [], function(prev, curr, i) {
                    var parent = pick(curr.parent, '');
                    if (prev[parent] === undefined) {
                        prev[parent] = [];
                    }
                    prev[parent].push(i);
                    return prev;
                }, {});

                // If parent does not exist, hoist parent to root of tree.
                eachObject(listOfParents, function(children, parent, list) {
                    if ((parent !== '') && (H.inArray(parent, ids) === -1)) {
                        each(children, function(child) {
                            list[''].push(child);
                        });
                        delete list[parent];
                    }
                });
                return listOfParents;
            },
            /**
             * Creates a tree structured object from the series points
             */
            getTree: function() {
                var series = this,
                    allIds = map(this.data, function(d) {
                        return d.id;
                    }),
                    parentList = series.getListOfParents(this.data, allIds);

                series.nodeMap = [];
                return series.buildNode('', -1, 0, parentList, null);
            },
            init: function(chart, options) {
                var series = this;
                Series.prototype.init.call(series, chart, options);
                if (series.options.allowDrillToNode) {
                    H.addEvent(series, 'click', series.onClickDrillToNode);
                }
            },
            buildNode: function(id, i, level, list, parent) {
                var series = this,
                    children = [],
                    point = series.points[i],
                    height = 0,
                    node,
                    child;

                // Actions
                each((list[id] || []), function(i) {
                    child = series.buildNode(series.points[i].id, i, (level + 1), list, id);
                    height = Math.max(child.height + 1, height);
                    children.push(child);
                });
                node = {
                    id: id,
                    i: i,
                    children: children,
                    height: height,
                    level: level,
                    parent: parent,
                    visible: false // @todo move this to better location
                };
                series.nodeMap[node.id] = node;
                if (point) {
                    point.node = node;
                }
                return node;
            },
            setTreeValues: function(tree) {
                var series = this,
                    options = series.options,
                    idRoot = series.rootNode,
                    mapIdToNode = series.nodeMap,
                    nodeRoot = mapIdToNode[idRoot],
                    levelIsConstant = (
                        isBoolean(options.levelIsConstant) ?
                        options.levelIsConstant :
                        true
                    ),
                    childrenTotal = 0,
                    children = [],
                    val,
                    point = series.points[tree.i];

                // First give the children some values
                each(tree.children, function(child) {
                    child = series.setTreeValues(child);
                    children.push(child);
                    if (!child.ignore) {
                        childrenTotal += child.val;
                    }
                });
                // Sort the children
                stableSort(children, function(a, b) {
                    return a.sortIndex - b.sortIndex;
                });
                // Set the values
                val = pick(point && point.options.value, childrenTotal);
                if (point) {
                    point.value = val;
                }
                extend(tree, {
                    children: children,
                    childrenTotal: childrenTotal,
                    // Ignore this node if point is not visible
                    ignore: !(pick(point && point.visible, true) && (val > 0)),
                    isLeaf: tree.visible && !childrenTotal,
                    levelDynamic: tree.level - (levelIsConstant ? 0 : nodeRoot.level),
                    name: pick(point && point.name, ''),
                    sortIndex: pick(point && point.sortIndex, -val),
                    val: val
                });
                return tree;
            },
            /**
             * Recursive function which calculates the area for all children of a node.
             * @param {Object} node The node which is parent to the children.
             * @param {Object} area The rectangular area of the parent.
             */
            calculateChildrenAreas: function(parent, area) {
                var series = this,
                    options = series.options,
                    level = this.levelMap[parent.levelDynamic + 1],
                    algorithm = pick((series[level && level.layoutAlgorithm] && level.layoutAlgorithm), options.layoutAlgorithm),
                    alternate = options.alternateStartingDirection,
                    childrenValues = [],
                    children;

                // Collect all children which should be included
                children = grep(parent.children, function(n) {
                    return !n.ignore;
                });

                if (level && level.layoutStartingDirection) {
                    area.direction = level.layoutStartingDirection === 'vertical' ? 0 : 1;
                }
                childrenValues = series[algorithm](area, children);
                each(children, function(child, index) {
                    var values = childrenValues[index];
                    child.values = merge(values, {
                        val: child.childrenTotal,
                        direction: (alternate ? 1 - area.direction : area.direction)
                    });
                    child.pointValues = merge(values, {
                        x: (values.x / series.axisRatio),
                        width: (values.width / series.axisRatio)
                    });
                    // If node has children, then call method recursively
                    if (child.children.length) {
                        series.calculateChildrenAreas(child, child.values);
                    }
                });
            },
            setPointValues: function() {
                var series = this,
                    xAxis = series.xAxis,
                    yAxis = series.yAxis;
                each(series.points, function(point) {
                    var node = point.node,
                        values = node.pointValues,
                        x1,
                        x2,
                        y1,
                        y2,
                        crispCorr = 0;


                    // Get the crisp correction in classic mode. For this to work in 
                    // styled mode, we would need to first add the shape (without x, y,
                    // width and height), then read the rendered stroke width using
                    // point.graphic.strokeWidth(), then modify and apply the shapeArgs.
                    // This applies also to column series, but the downside is
                    // performance and code complexity.
                    crispCorr = (
                        (series.pointAttribs(point)['stroke-width'] || 0) % 2
                    ) / 2;


                    // Points which is ignored, have no values.
                    if (values && node.visible) {
                        x1 = Math.round(xAxis.translate(values.x, 0, 0, 0, 1)) - crispCorr;
                        x2 = Math.round(xAxis.translate(values.x + values.width, 0, 0, 0, 1)) - crispCorr;
                        y1 = Math.round(yAxis.translate(values.y, 0, 0, 0, 1)) - crispCorr;
                        y2 = Math.round(yAxis.translate(values.y + values.height, 0, 0, 0, 1)) - crispCorr;
                        // Set point values
                        point.shapeType = 'rect';
                        point.shapeArgs = {
                            x: Math.min(x1, x2),
                            y: Math.min(y1, y2),
                            width: Math.abs(x2 - x1),
                            height: Math.abs(y2 - y1)
                        };
                        point.plotX = point.shapeArgs.x + (point.shapeArgs.width / 2);
                        point.plotY = point.shapeArgs.y + (point.shapeArgs.height / 2);
                    } else {
                        // Reset visibility
                        delete point.plotX;
                        delete point.plotY;
                    }
                });
            },

            /**
             * Set the node's color recursively, from the parent down.
             */
            setColorRecursive: function(node, parentColor, colorIndex, index, siblings) {
                var series = this,
                    chart = series && series.chart,
                    colors = chart && chart.options && chart.options.colors,
                    colorInfo,
                    point;

                if (node) {
                    colorInfo = getColor(node, {
                        colors: colors,
                        index: index,
                        levelMap: series.levelMap,
                        parentColor: parentColor,
                        parentColorIndex: colorIndex,
                        series: series,
                        siblings: siblings
                    });

                    point = series.points[node.i];
                    if (point) {
                        point.color = colorInfo.color;
                        point.colorIndex = colorInfo.colorIndex;
                    }

                    // Do it all again with the children
                    each(node.children || [], function(child, i) {
                        series.setColorRecursive(
                            child,
                            colorInfo.color,
                            colorInfo.colorIndex,
                            i,
                            node.children.length
                        );
                    });
                }
            },
            algorithmGroup: function(h, w, d, p) {
                this.height = h;
                this.width = w;
                this.plot = p;
                this.direction = d;
                this.startDirection = d;
                this.total = 0;
                this.nW = 0;
                this.lW = 0;
                this.nH = 0;
                this.lH = 0;
                this.elArr = [];
                this.lP = {
                    total: 0,
                    lH: 0,
                    nH: 0,
                    lW: 0,
                    nW: 0,
                    nR: 0,
                    lR: 0,
                    aspectRatio: function(w, h) {
                        return Math.max((w / h), (h / w));
                    }
                };
                this.addElement = function(el) {
                    this.lP.total = this.elArr[this.elArr.length - 1];
                    this.total = this.total + el;
                    if (this.direction === 0) {
                        // Calculate last point old aspect ratio
                        this.lW = this.nW;
                        this.lP.lH = this.lP.total / this.lW;
                        this.lP.lR = this.lP.aspectRatio(this.lW, this.lP.lH);
                        // Calculate last point new aspect ratio
                        this.nW = this.total / this.height;
                        this.lP.nH = this.lP.total / this.nW;
                        this.lP.nR = this.lP.aspectRatio(this.nW, this.lP.nH);
                    } else {
                        // Calculate last point old aspect ratio
                        this.lH = this.nH;
                        this.lP.lW = this.lP.total / this.lH;
                        this.lP.lR = this.lP.aspectRatio(this.lP.lW, this.lH);
                        // Calculate last point new aspect ratio
                        this.nH = this.total / this.width;
                        this.lP.nW = this.lP.total / this.nH;
                        this.lP.nR = this.lP.aspectRatio(this.lP.nW, this.nH);
                    }
                    this.elArr.push(el);
                };
                this.reset = function() {
                    this.nW = 0;
                    this.lW = 0;
                    this.elArr = [];
                    this.total = 0;
                };
            },
            algorithmCalcPoints: function(directionChange, last, group, childrenArea) {
                var pX,
                    pY,
                    pW,
                    pH,
                    gW = group.lW,
                    gH = group.lH,
                    plot = group.plot,
                    keep,
                    i = 0,
                    end = group.elArr.length - 1;
                if (last) {
                    gW = group.nW;
                    gH = group.nH;
                } else {
                    keep = group.elArr[group.elArr.length - 1];
                }
                each(group.elArr, function(p) {
                    if (last || (i < end)) {
                        if (group.direction === 0) {
                            pX = plot.x;
                            pY = plot.y;
                            pW = gW;
                            pH = p / pW;
                        } else {
                            pX = plot.x;
                            pY = plot.y;
                            pH = gH;
                            pW = p / pH;
                        }
                        childrenArea.push({
                            x: pX,
                            y: pY,
                            width: pW,
                            height: pH
                        });
                        if (group.direction === 0) {
                            plot.y = plot.y + pH;
                        } else {
                            plot.x = plot.x + pW;
                        }
                    }
                    i = i + 1;
                });
                // Reset variables
                group.reset();
                if (group.direction === 0) {
                    group.width = group.width - gW;
                } else {
                    group.height = group.height - gH;
                }
                plot.y = plot.parent.y + (plot.parent.height - group.height);
                plot.x = plot.parent.x + (plot.parent.width - group.width);
                if (directionChange) {
                    group.direction = 1 - group.direction;
                }
                // If not last, then add uncalculated element
                if (!last) {
                    group.addElement(keep);
                }
            },
            algorithmLowAspectRatio: function(directionChange, parent, children) {
                var childrenArea = [],
                    series = this,
                    pTot,
                    plot = {
                        x: parent.x,
                        y: parent.y,
                        parent: parent
                    },
                    direction = parent.direction,
                    i = 0,
                    end = children.length - 1,
                    group = new this.algorithmGroup(parent.height, parent.width, direction, plot); // eslint-disable-line new-cap
                // Loop through and calculate all areas
                each(children, function(child) {
                    pTot = (parent.width * parent.height) * (child.val / parent.val);
                    group.addElement(pTot);
                    if (group.lP.nR > group.lP.lR) {
                        series.algorithmCalcPoints(directionChange, false, group, childrenArea, plot);
                    }
                    // If last child, then calculate all remaining areas
                    if (i === end) {
                        series.algorithmCalcPoints(directionChange, true, group, childrenArea, plot);
                    }
                    i = i + 1;
                });
                return childrenArea;
            },
            algorithmFill: function(directionChange, parent, children) {
                var childrenArea = [],
                    pTot,
                    direction = parent.direction,
                    x = parent.x,
                    y = parent.y,
                    width = parent.width,
                    height = parent.height,
                    pX,
                    pY,
                    pW,
                    pH;
                each(children, function(child) {
                    pTot = (parent.width * parent.height) * (child.val / parent.val);
                    pX = x;
                    pY = y;
                    if (direction === 0) {
                        pH = height;
                        pW = pTot / pH;
                        width = width - pW;
                        x = x + pW;
                    } else {
                        pW = width;
                        pH = pTot / pW;
                        height = height - pH;
                        y = y + pH;
                    }
                    childrenArea.push({
                        x: pX,
                        y: pY,
                        width: pW,
                        height: pH
                    });
                    if (directionChange) {
                        direction = 1 - direction;
                    }
                });
                return childrenArea;
            },
            strip: function(parent, children) {
                return this.algorithmLowAspectRatio(false, parent, children);
            },
            squarified: function(parent, children) {
                return this.algorithmLowAspectRatio(true, parent, children);
            },
            sliceAndDice: function(parent, children) {
                return this.algorithmFill(true, parent, children);
            },
            stripes: function(parent, children) {
                return this.algorithmFill(false, parent, children);
            },
            translate: function() {
                var series = this,
                    rootId = series.rootNode = pick(series.rootNode, series.options.rootId, ''),
                    rootNode,
                    pointValues,
                    seriesArea,
                    tree,
                    val;

                // Call prototype function
                Series.prototype.translate.call(series);
                // Create a object map from level to options
                series.levelMap = reduce(series.options.levels || [],
                    function(arr, item) {
                        arr[item.level] = item;
                        return arr;
                    }, {});
                tree = series.tree = series.getTree(); // @todo Only if series.isDirtyData is true
                rootNode = series.nodeMap[rootId];
                if (
                    rootId !== '' &&
                    (!rootNode || !rootNode.children.length)
                ) {
                    series.drillToNode('', false);
                    rootId = series.rootNode;
                    rootNode = series.nodeMap[rootId];
                }
                // Parents of the root node is by default visible
                recursive(series.nodeMap[series.rootNode], function(node) {
                    var next = false,
                        p = node.parent;
                    node.visible = true;
                    if (p || p === '') {
                        next = series.nodeMap[p];
                    }
                    return next;
                });
                // Children of the root node is by default visible
                recursive(series.nodeMap[series.rootNode].children, function(children) {
                    var next = false;
                    each(children, function(child) {
                        child.visible = true;
                        if (child.children.length) {
                            next = (next || []).concat(child.children);
                        }
                    });
                    return next;
                });
                series.setTreeValues(tree);

                // Calculate plotting values.
                series.axisRatio = (series.xAxis.len / series.yAxis.len);
                series.nodeMap[''].pointValues = pointValues = {
                    x: 0,
                    y: 0,
                    width: 100,
                    height: 100
                };
                series.nodeMap[''].values = seriesArea = merge(pointValues, {
                    width: (pointValues.width * series.axisRatio),
                    direction: (series.options.layoutStartingDirection === 'vertical' ? 0 : 1),
                    val: tree.val
                });
                series.calculateChildrenAreas(tree, seriesArea);

                // Logic for point colors
                if (series.colorAxis) {
                    series.translateColors();
                } else if (!series.options.colorByPoint) {
                    series.setColorRecursive(series.tree);
                }

                // Update axis extremes according to the root node.
                if (series.options.allowDrillToNode) {
                    val = rootNode.pointValues;
                    series.xAxis.setExtremes(val.x, val.x + val.width, false);
                    series.yAxis.setExtremes(val.y, val.y + val.height, false);
                    series.xAxis.setScale();
                    series.yAxis.setScale();
                }

                // Assign values to points.
                series.setPointValues();
            },
            /**
             * Extend drawDataLabels with logic to handle custom options related to the treemap series:
             * - Points which is not a leaf node, has dataLabels disabled by default.
             * - Options set on series.levels is merged in.
             * - Width of the dataLabel is set to match the width of the point shape.
             */
            drawDataLabels: function() {
                var series = this,
                    points = grep(series.points, function(n) {
                        return n.node.visible;
                    }),
                    options,
                    level;
                each(points, function(point) {
                    level = series.levelMap[point.node.levelDynamic];
                    // Set options to new object to avoid problems with scope
                    options = {
                        style: {}
                    };

                    // If not a leaf, then label should be disabled as default
                    if (!point.node.isLeaf) {
                        options.enabled = false;
                    }

                    // If options for level exists, include them as well
                    if (level && level.dataLabels) {
                        options = merge(options, level.dataLabels);
                        series._hasPointLabels = true;
                    }

                    // Set dataLabel width to the width of the point shape.
                    if (point.shapeArgs) {
                        options.style.width = point.shapeArgs.width;
                        if (point.dataLabel) {
                            point.dataLabel.css({
                                width: point.shapeArgs.width + 'px'
                            });
                        }
                    }

                    // Merge custom options with point options
                    point.dlOptions = merge(options, point.options.dataLabels);
                });
                Series.prototype.drawDataLabels.call(this);
            },

            /**
             * Over the alignment method by setting z index
             */
            alignDataLabel: function(point) {
                seriesTypes.column.prototype.alignDataLabel.apply(this, arguments);
                if (point.dataLabel) {
                    // point.node.zIndex could be undefined (#6956)
                    point.dataLabel.attr({
                        zIndex: (point.node.zIndex || 0) + 1
                    });
                }
            },


            /**
             * Get presentational attributes
             */
            pointAttribs: function(point, state) {
                var level = point && this.levelMap[point.node.levelDynamic] || {},
                    options = this.options,
                    attr,
                    stateOptions = (state && options.states[state]) || {},
                    className = (point && point.getClassName()) || '',
                    opacity;

                // Set attributes by precedence. Point trumps level trumps series. Stroke width uses pick
                // because it can be 0.
                attr = {
                    'stroke':
                        (point && point.borderColor) ||
                        level.borderColor ||
                        stateOptions.borderColor ||
                        options.borderColor,
                    'stroke-width': pick(
                        point && point.borderWidth,
                        level.borderWidth,
                        stateOptions.borderWidth,
                        options.borderWidth
                    ),
                    'dashstyle':
                        (point && point.borderDashStyle) ||
                        level.borderDashStyle ||
                        stateOptions.borderDashStyle ||
                        options.borderDashStyle,
                    'fill': (point && point.color) || this.color
                };

                // Hide levels above the current view
                if (className.indexOf('highcharts-above-level') !== -1) {
                    attr.fill = 'none';
                    attr['stroke-width'] = 0;

                    // Nodes with children that accept interaction
                } else if (className.indexOf('highcharts-internal-node-interactive') !== -1) {
                    opacity = pick(stateOptions.opacity, options.opacity);
                    attr.fill = color(attr.fill).setOpacity(opacity).get();
                    attr.cursor = 'pointer';
                    // Hide nodes that have children
                } else if (className.indexOf('highcharts-internal-node') !== -1) {
                    attr.fill = 'none';

                } else if (state) {
                    // Brighten and hoist the hover nodes
                    attr.fill = color(attr.fill).brighten(stateOptions.brightness).get();
                }
                return attr;
            },


            /**
             * Extending ColumnSeries drawPoints
             */
            drawPoints: function() {
                var series = this,
                    points = grep(series.points, function(n) {
                        return n.node.visible;
                    });

                each(points, function(point) {
                    var groupKey = 'level-group-' + point.node.levelDynamic;
                    if (!series[groupKey]) {
                        series[groupKey] = series.chart.renderer.g(groupKey)
                            .attr({
                                zIndex: 1000 - point.node.levelDynamic // @todo Set the zIndex based upon the number of levels, instead of using 1000
                            })
                            .add(series.group);
                    }
                    point.group = series[groupKey];

                });
                // Call standard drawPoints
                seriesTypes.column.prototype.drawPoints.call(this);



                // If drillToNode is allowed, set a point cursor on clickables & add drillId to point 
                if (series.options.allowDrillToNode) {
                    each(points, function(point) {
                        if (point.graphic) {
                            point.drillId = series.options.interactByLeaf ? series.drillToByLeaf(point) : series.drillToByGroup(point);
                        }
                    });
                }
            },
            /**
             * Add drilling on the suitable points
             */
            onClickDrillToNode: function(event) {
                var series = this,
                    point = event.point,
                    drillId = point && point.drillId;
                // If a drill id is returned, add click event and cursor. 
                if (isString(drillId)) {
                    point.setState(''); // Remove hover
                    series.drillToNode(drillId);
                }
            },
            /**
             * Finds the drill id for a parent node.
             * Returns false if point should not have a click event
             * @param {Object} point
             * @return {String|Boolean} Drill to id or false when point should not have a click event
             */
            drillToByGroup: function(point) {
                var series = this,
                    drillId = false;
                if ((point.node.level - series.nodeMap[series.rootNode].level) === 1 && !point.node.isLeaf) {
                    drillId = point.id;
                }
                return drillId;
            },
            /**
             * Finds the drill id for a leaf node.
             * Returns false if point should not have a click event
             * @param {Object} point
             * @return {String|Boolean} Drill to id or false when point should not have a click event
             */
            drillToByLeaf: function(point) {
                var series = this,
                    drillId = false,
                    nodeParent;
                if ((point.node.parent !== series.rootNode) && (point.node.isLeaf)) {
                    nodeParent = point.node;
                    while (!drillId) {
                        nodeParent = series.nodeMap[nodeParent.parent];
                        if (nodeParent.parent === series.rootNode) {
                            drillId = nodeParent.id;
                        }
                    }
                }
                return drillId;
            },
            drillUp: function() {
                var series = this,
                    node = series.nodeMap[series.rootNode];
                if (node && isString(node.parent)) {
                    series.drillToNode(node.parent);
                }
            },
            drillToNode: function(id, redraw) {
                var series = this,
                    nodeMap = series.nodeMap,
                    node = nodeMap[id];
                series.idPreviousRoot = series.rootNode;
                series.rootNode = id;
                if (id === '') {
                    series.drillUpButton = series.drillUpButton.destroy();
                } else {
                    series.showDrillUpButton((node && node.name || id));
                }
                this.isDirty = true; // Force redraw
                if (pick(redraw, true)) {
                    this.chart.redraw();
                }
            },
            showDrillUpButton: function(name) {
                var series = this,
                    backText = (name || '< Back'),
                    buttonOptions = series.options.drillUpButton,
                    attr,
                    states;

                if (buttonOptions.text) {
                    backText = buttonOptions.text;
                }
                if (!this.drillUpButton) {
                    attr = buttonOptions.theme;
                    states = attr && attr.states;

                    this.drillUpButton = this.chart.renderer.button(
                            backText,
                            null,
                            null,
                            function() {
                                series.drillUp();
                            },
                            attr,
                            states && states.hover,
                            states && states.select
                        )
                        .attr({
                            align: buttonOptions.position.align,
                            zIndex: 7
                        })
                        .add()
                        .align(buttonOptions.position, false, buttonOptions.relativeTo || 'plotBox');
                } else {
                    this.drillUpButton.attr({
                            text: backText
                        })
                        .align();
                }
            },
            buildKDTree: noop,
            drawLegendSymbol: H.LegendSymbolMixin.drawRectangle,
            getExtremes: function() {
                // Get the extremes from the value data
                Series.prototype.getExtremes.call(this, this.colorValueData);
                this.valueMin = this.dataMin;
                this.valueMax = this.dataMax;

                // Get the extremes from the y data
                Series.prototype.getExtremes.call(this);
            },
            getExtremesFromAll: true,
            bindAxes: function() {
                var treeAxis = {
                    endOnTick: false,
                    gridLineWidth: 0,
                    lineWidth: 0,
                    min: 0,
                    dataMin: 0,
                    minPadding: 0,
                    max: 100,
                    dataMax: 100,
                    maxPadding: 0,
                    startOnTick: false,
                    title: null,
                    tickPositions: []
                };
                Series.prototype.bindAxes.call(this);
                H.extend(this.yAxis.options, treeAxis);
                H.extend(this.xAxis.options, treeAxis);
            },
            utils: {
                recursive: recursive,
                reduce: reduce
            }

            // Point class
        }, {
            getClassName: function() {
                var className = H.Point.prototype.getClassName.call(this),
                    series = this.series,
                    options = series.options;

                // Above the current level
                if (this.node.level <= series.nodeMap[series.rootNode].level) {
                    className += ' highcharts-above-level';

                } else if (!this.node.isLeaf && !pick(options.interactByLeaf, !options.allowDrillToNode)) {
                    className += ' highcharts-internal-node-interactive';

                } else if (!this.node.isLeaf) {
                    className += ' highcharts-internal-node';
                }
                return className;
            },

            /**
             * A tree point is valid if it has han id too, assume it may be a parent
             * item.
             */
            isValid: function() {
                return this.id || isNumber(this.value);
            },
            setState: function(state) {
                H.Point.prototype.setState.call(this, state);

                // Graphic does not exist when point is not visible.
                if (this.graphic) {
                    this.graphic.attr({
                        zIndex: state === 'hover' ? 1 : 0
                    });
                }
            },
            setVisible: seriesTypes.pie.prototype.pointClass.prototype.setVisible
        });


        /**
         * A `treemap` series. If the [type](#series.treemap.type) option is
         * not specified, it is inherited from [chart.type](#chart.type).
         * 
         * For options that apply to multiple series, it is recommended to add
         * them to the [plotOptions.series](#plotOptions.series) options structure.
         * To apply to all series of this specific type, apply it to [plotOptions.
         * treemap](#plotOptions.treemap).
         * 
         * @type {Object}
         * @extends series,plotOptions.treemap
         * @excluding dataParser,dataURL,stack
         * @product highcharts
         * @apioption series.treemap
         */

        /**
         * An array of data points for the series. For the `treemap` series
         * type, points can be given in the following ways:
         * 
         * 1.  An array of numerical values. In this case, the numerical values
         * will be interpreted as `value` options. Example:
         * 
         *  ```js
         *  data: [0, 5, 3, 5]
         *  ```
         * 
         * 2.  An array of objects with named values. The objects are point
         * configuration objects as seen below. If the total number of data
         * points exceeds the series' [turboThreshold](#series.treemap.turboThreshold),
         * this option is not available.
         * 
         *  ```js
         *     data: [{
         *         value: 9,
         *         name: "Point2",
         *         color: "#00FF00"
         *     }, {
         *         value: 6,
         *         name: "Point1",
         *         color: "#FF00FF"
         *     }]
         *  ```
         * 
         * @type {Array<Object|Number>}
         * @extends series.heatmap.data
         * @excluding x,y
         * @sample {highcharts} highcharts/chart/reflow-true/ Numerical values
         * @sample {highcharts} highcharts/series/data-array-of-arrays/ Arrays of numeric x and y
         * @sample {highcharts} highcharts/series/data-array-of-arrays-datetime/ Arrays of datetime x and y
         * @sample {highcharts} highcharts/series/data-array-of-name-value/ Arrays of point.name and y
         * @sample {highcharts} highcharts/series/data-array-of-objects/ Config objects
         * @product highcharts
         * @apioption series.treemap.data
         */

        /**
         * The value of the point, resulting in a relative area of the point
         * in the treemap.
         * 
         * @type {Number}
         * @product highcharts
         * @apioption series.treemap.data.value
         */

        /**
         * Serves a purpose only if a `colorAxis` object is defined in the chart
         * options. This value will decide which color the point gets from the
         * scale of the colorAxis.
         * 
         * @type {Number}
         * @default undefined
         * @since 4.1.0
         * @product highcharts
         * @apioption series.treemap.data.colorValue
         */

        /**
         * Only for treemap. Use this option to build a tree structure. The
         * value should be the id of the point which is the parent. If no points
         * has a matching id, or this option is undefined, then the parent will
         * be set to the root.
         * 
         * @type {String}
         * @sample {highcharts} highcharts/point/parent/ Point parent
         * @sample {highcharts} highcharts/demo/treemap-with-levels/ Example where parent id is not matching
         * @default undefined
         * @since 4.1.0
         * @product highcharts
         * @apioption series.treemap.data.parent
         */

    }(Highcharts, result));
    (function(H, drawPoint, mixinTreeSeries) {
        /**
         * (c) 2016 Highsoft AS
         * Authors: Jon Arild Nygard
         *
         * License: www.highcharts.com/license
         *
         * This is an experimental Highcharts module which enables visualization
         * of a word cloud.
         */
        var CenteredSeriesMixin = H.CenteredSeriesMixin,
            Series = H.Series,
            each = H.each,
            extend = H.extend,
            getCenter = CenteredSeriesMixin.getCenter,
            getColor = mixinTreeSeries.getColor,
            getStartAndEndRadians = CenteredSeriesMixin.getStartAndEndRadians,
            grep = H.grep,
            isBoolean = function(x) {
                return typeof x === 'boolean';
            },
            isNumber = H.isNumber,
            isObject = H.isObject,
            isString = H.isString,
            merge = H.merge,
            noop = H.noop,
            pick = H.pick,
            rad2deg = 180 / Math.PI,
            seriesType = H.seriesType,
            seriesTypes = H.seriesTypes,
            setTreeValues = mixinTreeSeries.setTreeValues,
            reduce = H.reduce;

        var layoutAlgorithm = function layoutAlgorithm(parent, children) {
            var startAngle = parent.start,
                range = parent.end - startAngle,
                total = parent.val,
                x = parent.x,
                y = parent.y,
                innerRadius = parent.r,
                outerRadius = innerRadius + parent.radius;

            return reduce(children || [], function(arr, child) {
                var percentage = (1 / total) * child.val,
                    radians = percentage * range,
                    values = {
                        x: x,
                        y: y,
                        innerR: innerRadius,
                        r: outerRadius,
                        radius: parent.radius,
                        start: startAngle,
                        end: startAngle + radians
                    };
                arr.push(values);
                startAngle = values.end;
                return arr;
            }, []);
        };

        /**
         * getEndPoint - Find a set of coordinates given a start coordinates, an angle,
         *     and a distance.
         *
         * @param  {number} x Start coordinate x
         * @param  {number} y Start coordinate y
         * @param  {number} angle Angle in radians
         * @param  {number} distance Distance from start to end coordinates
         * @return {object} Returns the end coordinates, x and y.
         */
        var getEndPoint = function getEndPoint(x, y, angle, distance) {
            return {
                x: x + (Math.cos(angle) * distance),
                y: y + (Math.sin(angle) * distance)
            };
        };

        var getDlOptions = function getDlOptions(params) {
            // Set options to new object to avoid problems with scope
            var shape = isObject(params.shapeArgs) ? params.shapeArgs : {},
                optionsSeries = (
                    isObject(params.optionsSeries) ?
                    params.optionsSeries.dataLabels : {}
                ),
                optionsPoint = (
                    isObject(params.optionsPoint) ?
                    params.optionsPoint.dataLabels : {}
                ),
                optionsLevel = (
                    isObject(params.level) ?
                    params.level.dataLabels : {}
                ),
                options = merge({
                    rotationMode: 'perpendicular',
                    style: {
                        width: shape.radius
                    }
                }, optionsSeries, optionsLevel, optionsPoint),
                rotationRad,
                rotation;
            if (!isNumber(options.rotation)) {
                rotationRad = (shape.end - (shape.end - shape.start) / 2);
                rotation = (rotationRad * rad2deg) % 180;
                if (options.rotationMode === 'parallel') {
                    rotation -= 90;
                }
                // Data labels should not rotate beyond 90 degrees, for readability.
                if (rotation > 90) {
                    rotation -= 180;
                }
                options.rotation = rotation;
            }
            // NOTE: alignDataLabel positions the data label differntly when rotation is
            // 0. Avoiding this by setting rotation to a small number.
            if (options.rotation === 0) {
                options.rotation = 0.001;
            }
            return options;
        };

        var getAnimation = function getAnimation(shape, params) {
            var center = params.center,
                point = params.point,
                radians = params.radians,
                innerR = params.innerR,
                idRoot = params.idRoot,
                idPreviousRoot = params.idPreviousRoot,
                shapeExisting = params.shapeExisting,
                shapeRoot = params.shapeRoot,
                shapePreviousRoot = params.shapePreviousRoot,
                visible = params.visible,
                from = {},
                to = {
                    end: shape.end,
                    start: shape.start,
                    innerR: shape.innerR,
                    r: shape.r,
                    x: center.x,
                    y: center.y
                };
            if (visible) {
                // Animate points in
                if (!point.graphic && shapePreviousRoot) {
                    if (idRoot === point.id) {
                        from = {
                            start: radians.start,
                            end: radians.end
                        };
                    } else {
                        from = (shapePreviousRoot.end <= shape.start) ? {
                            start: radians.end,
                            end: radians.end
                        } : {
                            start: radians.start,
                            end: radians.start
                        };
                    }
                    // Animate from center and outwards.
                    from.innerR = from.r = innerR;
                }
            } else {
                // Animate points out
                if (point.graphic) {
                    if (idPreviousRoot === point.id) {
                        to = {
                            innerR: innerR,
                            r: innerR
                        };
                    } else if (shapeRoot) {
                        to = (shapeRoot.end <= shapeExisting.start) ? {
                            innerR: innerR,
                            r: innerR,
                            start: radians.end,
                            end: radians.end
                        } : {
                            innerR: innerR,
                            r: innerR,
                            start: radians.start,
                            end: radians.start
                        };
                    }
                }
            }
            return {
                from: from,
                to: to
            };
        };

        var getDrillId = function getDrillId(point, idRoot, mapIdToNode) {
            var drillId,
                node = point.node,
                nodeRoot;
            if (!node.isLeaf) {
                // When it is the root node, the drillId should be set to parent.
                if (idRoot === point.id) {
                    nodeRoot = mapIdToNode[idRoot];
                    drillId = nodeRoot.parent;
                } else {
                    drillId = point.id;
                }
            }
            return drillId;
        };

        var cbSetTreeValuesBefore = function before(node, options) {
            var mapIdToNode = options.mapIdToNode,
                nodeParent = mapIdToNode[node.parent],
                series = options.series,
                chart = series.chart,
                points = series.points,
                point = points[node.i],
                colorInfo = getColor(node, {
                    colors: chart && chart.options && chart.options.colors,
                    colorIndex: series.colorIndex,
                    colorByPoint: series.colorByPoint,
                    index: options.index,
                    levelMap: options.levelMap,
                    parentColor: nodeParent && nodeParent.color,
                    parentColorIndex: nodeParent && nodeParent.colorIndex,
                    series: options.series,
                    siblings: options.siblings
                });
            node.color = colorInfo.color;
            node.colorIndex = colorInfo.colorIndex;
            if (point) {
                point.color = node.color;
                point.colorIndex = node.colorIndex;
            }
            return node;
        };

        /**
         * A Sunburst displays hierarchical data, where a level in the hierarchy is represented by a circle.
         * The center represents the root node of the tree.
         * The visualization bears a resemblance to both treemap and pie charts.
         *
         * @extends {plotOptions.pie}
         * @sample highcharts/demo/sunburst Sunburst chart
         * @excluding allAreas, center, clip, colorAxis, compare, compareBase,
         *            dataGrouping, depth, endAngle, gapSize, gapUnit,
         *            ignoreHiddenPoint, innerSize, joinBy, legendType, linecap,
         *            minSize, navigatorOptions, pointRange, slicedOffset
         * @product highcharts
         * @optionparent plotOptions.sunburst
         */
        var sunburstOptions = {
            /**
             * The center of the sunburst chart relative to the plot area. Can be
             * percentages or pixel values.
             *
             * @type {Array<String|Number>}
             * @sample {highcharts} highcharts/plotoptions/pie-center/ Centered at 100, 100
             * @product highcharts
             */
            center: ['50%', '50%'],
            /**
             * @extends plotOptions.series.dataLabels
             * @excluding align,allowOverlap,staggerLines,step
             */
            dataLabels: {
                defer: true,
                style: {
                    textOverflow: 'ellipsis'
                },
                /**
                 * Decides how the data label will be rotated according to the perimeter
                 * of the sunburst. It can either be parallel or perpendicular to the
                 * perimeter.
                 * `series.rotation` takes precedence over `rotationMode`.
                 * @since 6.0.0
                 * @validvalue ["perpendicular", "parallel"]
                 */
                rotationMode: 'perpendicular'
            },
            /**
             * Which point to use as a root in the visualization.
             *
             * @type {String|undefined}
             * @default undefined
             */
            rootId: undefined,

            /**
             * Used together with the levels and `allowDrillToNode` options. When
             * set to false the first level visible when drilling is considered
             * to be level one. Otherwise the level will be the same as the tree
             * structure.
             */
            levelIsConstant: true
            /**
             * Set options on specific levels. Takes precedence over series options,
             * but not point options.
             *
             * @type {Array<Object>}
             * @sample highcharts/demo/sunburst Sunburst chart
             * @apioption plotOptions.sunburst.levels
             */
            /**
             * Can set a `borderColor` on all points which lies on the same level.
             *
             * @type {Color}
             * @apioption plotOptions.sunburst.levels.borderColor
             */
            /**
             * Can set a `borderWidth` on all points which lies on the same level.
             *
             * @type {Number}
             * @apioption plotOptions.sunburst.levels.borderWidth
             */
            /**
             * Can set a `borderDashStyle` on all points which lies on the same level.
             *
             * @type {String}
             * @apioption plotOptions.sunburst.levels.borderDashStyle
             */
            /**
             * Can set a `color` on all points which lies on the same level.
             *
             * @type {Color}
             * @apioption plotOptions.sunburst.levels.color
             */
            /**
             * Can set a `colorVariation` on all points which lies on the same level.
             *
             * @type {Object}
             * @apioption plotOptions.sunburst.levels.colorVariation
             */
            /**
             * The key of a color variation. Currently supports `brightness` only.
             *
             * @type {String}
             * @apioption plotOptions.sunburst.levels.colorVariation.key
             */
            /**
             * The ending value of a color variation. The last sibling will receive this
             * value.
             *
             * @type {Number}
             * @apioption plotOptions.sunburst.levels.colorVariation.to
             */
            /**
             * Can set a `dataLabels` on all points which lies on the same level.
             *
             * @type {Object}
             * @apioption plotOptions.sunburst.levels.dataLabels
             */
            /**
             * Can set a `rotation` on all points which lies on the same level.
             *
             * @type {Number}
             * @apioption plotOptions.sunburst.levels.rotation
             */
            /**
             * Can set a `rotationMode` on all points which lies on the same level.
             *
             * @type {String}
             * @apioption plotOptions.sunburst.levels.rotationMode
             */
            /**
             * When enabled the user can click on a point which is a parent and
             * zoom in on its children.
             *
             * @sample highcharts/demo/sunburst
             *         Allow drill to node
             * @type {Boolean}
             * @default false
             * @apioption plotOptions.sunburst.allowDrillToNode
             */
        };

        /**
         * Properties of the Sunburst series.
         */
        var sunburstSeries = {
            drawDataLabels: noop, // drawDataLabels is called in drawPoints
            drawPoints: function drawPoints() {
                var series = this,
                    levelMap = series.levelMap,
                    shapeRoot = series.shapeRoot,
                    group = series.group,
                    hasRendered = series.hasRendered,
                    idRoot = series.rootNode,
                    idPreviousRoot = series.idPreviousRoot,
                    nodeMap = series.nodeMap,
                    nodePreviousRoot = nodeMap[idPreviousRoot],
                    shapePreviousRoot = nodePreviousRoot && nodePreviousRoot.shapeArgs,
                    points = series.points,
                    radians = series.startAndEndRadians,
                    chart = series.chart,
                    optionsChart = chart && chart.options && chart.options.chart || {},
                    animation = (
                        isBoolean(optionsChart.animation) ?
                        optionsChart.animation :
                        true
                    ),
                    positions = series.center,
                    center = {
                        x: positions[0],
                        y: positions[1]
                    },
                    innerR = positions[3] / 2,
                    renderer = series.chart.renderer,
                    animateLabels,
                    animateLabelsCalled = false,
                    addedHack = false,
                    hackDataLabelAnimation = !!(
                        animation &&
                        hasRendered &&
                        idRoot !== idPreviousRoot &&
                        series.dataLabelsGroup
                    );

                if (hackDataLabelAnimation) {
                    series.dataLabelsGroup.attr({
                        opacity: 0
                    });
                    animateLabels = function() {
                        var s = series;
                        animateLabelsCalled = true;
                        if (s.dataLabelsGroup) {
                            s.dataLabelsGroup.animate({
                                opacity: 1,
                                visibility: 'visible'
                            });
                        }
                    };
                }
                each(points, function(point) {
                    var node = point.node,
                        level = levelMap[node.levelDynamic],
                        shapeExisting = point.shapeExisting || {},
                        shape = node.shapeArgs || {},
                        animationInfo,
                        onComplete,
                        visible = !!(node.visible && node.shapeArgs);
                    if (hasRendered && animation) {
                        animationInfo = getAnimation(shape, {
                            center: center,
                            point: point,
                            radians: radians,
                            innerR: innerR,
                            idRoot: idRoot,
                            idPreviousRoot: idPreviousRoot,
                            shapeExisting: shapeExisting,
                            shapeRoot: shapeRoot,
                            shapePreviousRoot: shapePreviousRoot,
                            visible: visible
                        });
                    } else {
                        // When animation is disabled, attr is called from animation.
                        animationInfo = {
                            to: shape,
                            from: {}
                        };
                    }
                    extend(point, {
                        shapeExisting: shape, // Store for use in animation
                        tooltipPos: [shape.plotX, shape.plotY],
                        drillId: getDrillId(point, idRoot, nodeMap),
                        name: '' + (point.name || point.id || point.index),
                        plotX: shape.plotX, // used for data label position
                        plotY: shape.plotY, // used for data label position
                        value: node.val,
                        isNull: !visible // used for dataLabels & point.draw
                    });
                    point.dlOptions = getDlOptions({
                        level: level,
                        optionsPoint: point.options,
                        optionsSeries: series.options,
                        shapeArgs: shape
                    });
                    if (!addedHack && visible) {
                        addedHack = true;
                        onComplete = animateLabels;
                    }
                    point.draw({
                        animate: animationInfo.to,
                        attr: extend(
                            animationInfo.from,
                            series.pointAttribs && series.pointAttribs(
                                point,
                                point.selected && 'select'
                            )
                        ),
                        onComplete: onComplete,
                        group: group,
                        renderer: renderer,
                        shapeType: 'arc',
                        shapeArgs: shape
                    });
                });
                // Draw data labels after points
                // TODO draw labels one by one to avoid addtional looping
                if (hackDataLabelAnimation && addedHack) {
                    series.hasRendered = false;
                    series.options.dataLabels.defer = true;
                    Series.prototype.drawDataLabels.call(series);
                    series.hasRendered = true;
                    // If animateLabels is called before labels were hidden, then call
                    // it again.
                    if (animateLabelsCalled) {
                        animateLabels();
                    }
                } else {
                    Series.prototype.drawDataLabels.call(series);
                }
            },

            pointAttribs: seriesTypes.column.prototype.pointAttribs,


            /*
             * Set the shape arguments on the nodes. Recursive from root down.
             */
            setShapeArgs: function(parent, parentValues) {
                var childrenValues = [],
                    // Collect all children which should be included
                    children = grep(parent.children, function(n) {
                        return n.visible;
                    });
                childrenValues = layoutAlgorithm(parentValues, children);
                each(children, function(child, index) {
                    var values = childrenValues[index],
                        angle = values.start + ((values.end - values.start) / 2),
                        radius = values.innerR + ((values.r - values.innerR) / 2),
                        isCircle = (
                            values.innerR === 0 &&
                            (values.end - values.start) > 6.28
                        ),
                        center = (
                            isCircle ? {
                                x: values.x,
                                y: values.y
                            } :
                            getEndPoint(values.x, values.y, angle, radius)
                        ),
                        val = (
                            child.val ?
                            (
                                child.childrenTotal > child.val ?
                                child.childrenTotal :
                                child.val
                            ) :
                            child.childrenTotal
                        ),
                        innerArcFraction = (values.end - values.start) / (2 * Math.PI),
                        perimeter = 2 * Math.PI * values.innerR;

                    // The inner arc length is a convenience for data label filters.
                    if (this.points[child.i]) {
                        this.points[child.i].innerArcLength =
                            innerArcFraction * perimeter;
                    }

                    child.shapeArgs = merge(values, {
                        plotX: center.x,
                        plotY: center.y
                    });
                    child.values = merge(values, {
                        val: val
                    });
                    // If node has children, then call method recursively
                    if (child.children.length) {
                        this.setShapeArgs(child, child.values);
                    }
                }, this);
            },


            translate: function translate() {
                var series = this,
                    options = series.options,
                    positions = series.center = getCenter.call(series),
                    radians = series.startAndEndRadians = getStartAndEndRadians(options.startAngle, options.endAngle),
                    innerRadius = positions[3] / 2,
                    outerRadius = positions[2] / 2,
                    idRoot = series.rootNode = pick(series.rootNode, options.rootId, ''),
                    mapIdToNode = series.nodeMap,
                    idTop,
                    nodeRoot = mapIdToNode && mapIdToNode[idRoot],
                    nodeTop,
                    radiusPerLevel,
                    tree,
                    height,
                    values;
                series.shapeRoot = nodeRoot && nodeRoot.shapeArgs;
                // Call prototype function
                Series.prototype.translate.call(series);
                // Create a object map from level to options
                series.levelMap = reduce(series.options.levels || [],
                    function(arr, item) {
                        arr[item.level] = item;
                        return arr;
                    }, {});
                // @todo Only if series.isDirtyData is true
                tree = series.tree = series.getTree();
                mapIdToNode = series.nodeMap;
                nodeRoot = mapIdToNode[idRoot];
                idTop = isString(nodeRoot.parent) ? nodeRoot.parent : '';
                nodeTop = mapIdToNode[idTop];
                // TODO Try to combine setTreeValues & setColorRecursive to avoid
                //  unnecessary looping.
                setTreeValues(tree, {
                    before: cbSetTreeValuesBefore,
                    idRoot: idRoot,
                    levelIsConstant: options.levelIsConstant,
                    levelMap: series.levelMap,
                    mapIdToNode: mapIdToNode,
                    points: series.points,
                    series: series
                });
                height = (idRoot === idTop) ? nodeRoot.height : nodeRoot.height + 1;
                radiusPerLevel = (outerRadius - innerRadius) / height;
                values = mapIdToNode[''].shapeArgs = {
                    end: radians.end,
                    r: innerRadius,
                    radius: radiusPerLevel,
                    start: radians.start,
                    val: nodeTop.val,
                    x: positions[0],
                    y: positions[1]
                };
                this.setShapeArgs(nodeTop, values);
            },

            /**
             * Animate the slices in. Similar to the animation of polar charts.
             */
            animate: function(init) {
                var chart = this.chart,
                    center = [
                        chart.plotWidth / 2,
                        chart.plotHeight / 2
                    ],
                    plotLeft = chart.plotLeft,
                    plotTop = chart.plotTop,
                    attribs,
                    group = this.group;

                // Initialize the animation
                if (init) {

                    // Scale down the group and place it in the center
                    attribs = {
                        translateX: center[0] + plotLeft,
                        translateY: center[1] + plotTop,
                        scaleX: 0.001, // #1499
                        scaleY: 0.001,
                        rotation: 10,
                        opacity: 0.01
                    };

                    group.attr(attribs);

                    // Run the animation
                } else {
                    attribs = {
                        translateX: plotLeft,
                        translateY: plotTop,
                        scaleX: 1,
                        scaleY: 1,
                        rotation: 0,
                        opacity: 1
                    };
                    group.animate(attribs, this.options.animation);

                    // Delete this function to allow it only once
                    this.animate = null;
                }
            }
        };

        /**
         * Properties of the Sunburst series.
         */
        var sunburstPoint = {
            draw: drawPoint,
            shouldDraw: function shouldDraw() {
                var point = this;
                return !point.isNull;
            }
        };

        /**
         * A `sunburst` series. If the [type](#series.sunburst.type) option is
         * not specified, it is inherited from [chart.type](#chart.type).
         * 
         * For options that apply to multiple series, it is recommended to add
         * them to the [plotOptions.series](#plotOptions.series) options structure.
         * To apply to all series of this specific type, apply it to [plotOptions.
         * sunburst](#plotOptions.sunburst).
         * 
         * @type {Object}
         * @extends plotOptions.sunburst
         * @excluding dataParser,dataURL,stack
         * @product highcharts
         * @apioption series.sunburst
         */

        /** 
         * @type {Array<Object|Number>}
         * @extends series.treemap.data
         * @excluding x,y
         * @product highcharts
         * @apioption series.sunburst.data
         */

        /**
         * The value of the point, resulting in a relative area of the point
         * in the sunburst.
         * 
         * @type {Number}
         * @default undefined
         * @since 6.0.0
         * @product highcharts
         * @apioption series.sunburst.data.value
         */

        /**
         * Use this option to build a tree structure. The value should be the id of the
         * point which is the parent. If no points has a matching id, or this option is
         * undefined, then the parent will be set to the root.
         * 
         * @type {String|undefined}
         * @default undefined
         * @since 6.0.0
         * @product highcharts
         * @apioption series.treemap.data.parent
         */
        seriesType(
            'sunburst',
            'treemap',
            sunburstOptions,
            sunburstSeries,
            sunburstPoint
        );

    }(Highcharts, draw, result));
}));
