/* *
 *
 *  (c) 2014-2019 Highsoft AS
 *
 *  Authors: Jon Arild Nygard / Oystein Moseng
 *
 *  License: www.highcharts.com/license
 *
 *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
 *
 * */
'use strict';
import H from '../parts/Globals.js';
import mixinTreeSeries from '../mixins/tree-series.js';
import drawPoint from '../mixins/draw-point.js';
import U from '../parts/Utilities.js';
var defined = U.defined, extend = U.extend, isArray = U.isArray, isNumber = U.isNumber, isObject = U.isObject, isString = U.isString, objectEach = U.objectEach, pick = U.pick;
import '../parts/Options.js';
import '../parts/Series.js';
import '../parts/Color.js';
/* eslint-disable no-invalid-this */
var seriesType = H.seriesType, seriesTypes = H.seriesTypes, addEvent = H.addEvent, merge = H.merge, error = H.error, noop = H.noop, fireEvent = H.fireEvent, getColor = mixinTreeSeries.getColor, getLevelOptions = mixinTreeSeries.getLevelOptions, 
// @todo Similar to eachObject, this function is likely redundant
isBoolean = function (x) {
    return typeof x === 'boolean';
}, Series = H.Series, stableSort = H.stableSort, color = H.Color, 
// @todo Similar to recursive, this function is likely redundant
eachObject = function (list, func, context) {
    context = context || this;
    objectEach(list, function (val, key) {
        func.call(context, val, key, list);
    });
}, 
// @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);
    }
}, updateRootId = mixinTreeSeries.updateRootId;
/* eslint-enable no-invalid-this */
/**
 * @private
 * @class
 * @name Highcharts.seriesTypes.treemap
 *
 * @augments Highcharts.Series
 */
seriesType('treemap', 'scatter'
/**
 * 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    dragDrop, marker, jitter
 * @product      highcharts
 * @requires     modules/treemap
 * @optionparent plotOptions.treemap
 */
, {
    /**
     * When enabled the user can click on a point which is a parent and
     * zoom in on its children. Deprecated and replaced by
     * [allowTraversingTree](#plotOptions.treemap.allowTraversingTree).
     *
     * @sample {highcharts} highcharts/plotoptions/treemap-allowdrilltonode/
     *         Enabled
     *
     * @deprecated
     * @type      {boolean}
     * @default   false
     * @since     4.1.0
     * @product   highcharts
     * @apioption plotOptions.treemap.allowDrillToNode
     */
    /**
     * When enabled the user can click on a point which is a parent and
     * zoom in on its children.
     *
     * @sample {highcharts} highcharts/plotoptions/treemap-allowtraversingtree/
     *         Enabled
     *
     * @since     7.0.3
     * @product   highcharts
     */
    allowTraversingTree: false,
    animationLimit: 250,
    /**
     * 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
     */
    /**
     * Fires on a request for change of root node for the tree, before the
     * update is made. An event object is passed to the function, containing
     * additional properties `newRootId`, `previousRootId`, `redraw` and
     * `trigger`.
     *
     * @type {function}
     * @default undefined
     * @sample {highcharts} highcharts/plotoptions/treemap-events-setrootnode/
     *         Alert update information on setRootNode event.
     * @since 7.0.3
     * @product highcharts
     * @apioption plotOptions.treemap.events.setRootNode
     */
    /**
     * 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 allowTraversingTree is true, then it
     * will be false by default.
     *
     * @sample {highcharts} highcharts/plotoptions/treemap-interactbyleaf-false/
     *         False
     * @sample {highcharts} highcharts/plotoptions/treemap-interactbyleaf-true-and-allowtraversingtree/
     *         InteractByLeaf and allowTraversingTree is true
     *
     * @type      {boolean}
     * @since     4.1.2
     * @product   highcharts
     * @apioption plotOptions.treemap.interactByLeaf
     */
    /**
     * The sort index of the point inside the treemap level.
     *
     * @sample {highcharts} highcharts/plotoptions/treemap-sortindex/
     *         Sort by years
     *
     * @type      {number}
     * @since     4.1.10
     * @product   highcharts
     * @apioption plotOptions.treemap.sortIndex
     */
    /**
     * A series specific or series type specific color set to apply instead
     * of the global [colors](#colors) when
     * [colorByPoint](#plotOptions.treemap.colorByPoint) is true.
     *
     * @type      {Array<Highcharts.ColorString|Highcharts.GradientColorObject|Highcharts.PatternObject>}
     * @since     3.0
     * @product   highcharts
     * @apioption plotOptions.treemap.colors
     */
    /**
     * Whether to display this series type or specific series item in the
     * legend.
     */
    showInLegend: false,
    /**
     * @ignore-option
     */
    marker: false,
    /**
     * When using automatic point colors pulled from the `options.colors`
     * collection, this option determines whether the chart should receive
     * one color per series or one color per point.
     *
     * @see [series colors](#plotOptions.treemap.colors)
     *
     * @since     2.0
     * @product   highcharts
     * @apioption plotOptions.treemap.colorByPoint
     */
    colorByPoint: false,
    /**
     * @since 4.1.0
     */
    dataLabels: {
        /** @ignore-option */
        defer: false,
        /** @ignore-option */
        enabled: true,
        // eslint-disable-next-line valid-jsdoc
        /** @ignore-option */
        formatter: function () {
            var point = this && this.point ?
                this.point :
                {}, name = isString(point.name) ? point.name : '';
            return name;
        },
        /** @ignore-option */
        inside: true,
        /** @ignore-option */
        verticalAlign: 'middle'
    },
    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.
     *
     * @since 5.0.8
     */
    ignoreHiddenPoint: true,
    /**
     * This option decides which algorithm is used for setting position
     * and dimensions of the points.
     *
     * @see [How to write your own algorithm](https://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
     *
     * @since      4.1.0
     * @validvalue ["sliceAndDice", "stripes", "squarified", "strip"]
     */
    layoutAlgorithm: 'sliceAndDice',
    /**
     * Defines which direction the layout algorithm will start drawing.
     *
     * @since       4.1.0
     * @validvalue ["vertical", "horizontal"]
     */
    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.
     *
     * @sample {highcharts} highcharts/plotoptions/treemap-alternatestartingdirection-true/
     *         Enabled
     *
     * @since 4.1.0
     */
    alternateStartingDirection: false,
    /**
     * Used together with the levels and allowTraversingTree options. When
     * set to false the first level visible to be level one, which is
     * dynamic when traversing the tree. Otherwise the level will be the
     * same as the tree structure.
     *
     * @since 4.1.0
     */
    levelIsConstant: true,
    /**
     * Options for the button appearing when drilling down in a treemap.
     * Deprecated and replaced by
     * [traverseUpButton](#plotOptions.treemap.traverseUpButton).
     *
     * @deprecated
     */
    drillUpButton: {
        /**
         * The position of the button.
         *
         * @deprecated
         */
        position: {
            /**
             * Vertical alignment of the button.
             *
             * @deprecated
             * @type      {Highcharts.VerticalAlignValue}
             * @default   top
             * @product   highcharts
             * @apioption plotOptions.treemap.drillUpButton.position.verticalAlign
             */
            /**
             * Horizontal alignment of the button.
             *
             * @deprecated
             * @type {Highcharts.AlignValue}
             */
            align: 'right',
            /**
             * Horizontal offset of the button.
             *
             * @deprecated
             */
            x: -10,
            /**
             * Vertical offset of the button.
             *
             * @deprecated
             */
            y: 10
        }
    },
    /**
     * Options for the button appearing when traversing down in a treemap.
     */
    traverseUpButton: {
        /**
         * The position of the button.
         */
        position: {
            /**
             * Vertical alignment of the button.
             *
             * @type      {Highcharts.VerticalAlignValue}
             * @default   top
             * @product   highcharts
             * @apioption plotOptions.treemap.traverseUpButton.position.verticalAlign
             */
            /**
             * Horizontal alignment of the button.
             *
             * @type {Highcharts.AlignValue}
             */
            align: 'right',
            /**
             * Horizontal offset of the button.
             */
            x: -10,
            /**
             * Vertical offset of the button.
             */
            y: 10
        }
    },
    /**
     * Set options on specific levels. Takes precedence over series options,
     * but not point options.
     *
     * @sample {highcharts} highcharts/plotoptions/treemap-levels/
     *         Styling dataLabels and borders
     * @sample {highcharts} highcharts/demo/treemap-with-levels/
     *         Different layoutAlgorithm
     *
     * @type      {Array<*>}
     * @since     4.1.0
     * @product   highcharts
     * @apioption plotOptions.treemap.levels
     */
    /**
     * Can set a `borderColor` on all points which lies on the same level.
     *
     * @type      {Highcharts.ColorString}
     * @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      {Highcharts.DashStyleValue}
     * @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      {Highcharts.ColorString|Highcharts.GradientColorObject|Highcharts.PatternObject}
     * @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.
     *
     * @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}
     * @since      6.0.0
     * @product    highcharts
     * @validvalue ["brightness"]
     * @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      {Highcharts.DataLabelsOptionsObject}
     * @since     4.1.0
     * @product   highcharts
     * @apioption plotOptions.treemap.levels.dataLabels
     */
    /**
     * Can set the layoutAlgorithm option on a specific level.
     *
     * @type       {string}
     * @since      4.1.0
     * @product    highcharts
     * @validvalue ["sliceAndDice", "stripes", "squarified", "strip"]
     * @apioption  plotOptions.treemap.levels.layoutAlgorithm
     */
    /**
     * Can set the layoutStartingDirection option on a specific level.
     *
     * @type       {string}
     * @since      4.1.0
     * @product    highcharts
     * @validvalue ["vertical", "horizontal"]
     * @apioption  plotOptions.treemap.levels.layoutStartingDirection
     */
    /**
     * Decides which level takes effect from the options set in the levels
     * object.
     *
     * @sample {highcharts} highcharts/plotoptions/treemap-levels/
     *         Styling of both levels
     *
     * @type      {number}
     * @since     4.1.0
     * @product   highcharts
     * @apioption plotOptions.treemap.levels.level
     */
    // Presentational options
    /**
     * The color of the border surrounding each tree map item.
     *
     * @type {Highcharts.ColorString}
     */
    borderColor: '#e6e6e6',
    /**
     * The width of the border surrounding each tree map item.
     */
    borderWidth: 1,
    colorKey: 'colorValue',
    /**
     * The opacity of a point in treemap. When a point has children, the
     * visibility of the children is determined by the opacity.
     *
     * @since 4.2.4
     */
    opacity: 0.15,
    /**
     * A wrapper object for all the series options in specific states.
     *
     * @extends plotOptions.heatmap.states
     */
    states: {
        /**
         * Options for the hovered series
         *
         * @extends   plotOptions.heatmap.states.hover
         * @excluding halo
         */
        hover: {
            /**
             * The border color for the hovered state.
             */
            borderColor: '#999999',
            /**
             * Brightness for the hovered point. Defaults to 0 if the
             * heatmap series is loaded first, otherwise 0.1.
             *
             * @type    {number}
             * @default undefined
             */
            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.
             *
             * @since 4.2.4
             */
            opacity: 0.75,
            /**
             * The shadow option for hovered state.
             */
            shadow: false
        }
    }
    // Prototype members
}, {
    pointArrayMap: ['value'],
    directTouch: true,
    optionalAxis: 'colorAxis',
    getSymbol: noop,
    parallelArrays: ['x', 'y', 'value', 'colorValue'],
    colorKey: 'colorValue',
    trackerGroups: ['group', 'dataLabelsGroup'],
    /* eslint-disable no-invalid-this, valid-jsdoc */
    /**
     * Creates an object map from parent id to childrens index.
     *
     * @private
     * @function Highcharts.Series#getListOfParents
     *
     * @param {Highcharts.SeriesTreemapDataOptions} [data]
     *        List of points set in options.
     *
     * @param {Array<string>} [existingIds]
     *        List of all point ids.
     *
     * @return {object}
     *         Map from parent id to children index in data.
     */
    getListOfParents: function (data, existingIds) {
        var arr = isArray(data) ? data : [], ids = isArray(existingIds) ? existingIds : [], listOfParents = arr.reduce(function (prev, curr, i) {
            var parent = pick(curr.parent, '');
            if (prev[parent] === undefined) {
                prev[parent] = [];
            }
            prev[parent].push(i);
            return prev;
        }, {
            '': [] // Root of tree
        });
        // If parent does not exist, hoist parent to root of tree.
        eachObject(listOfParents, function (children, parent, list) {
            if ((parent !== '') && (ids.indexOf(parent) === -1)) {
                children.forEach(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 = this.data.map(function (d) {
            return d.id;
        }), parentList = series.getListOfParents(this.data, allIds);
        series.nodeMap = [];
        return series.buildNode('', -1, 0, parentList, null);
    },
    // Define hasData function for non-cartesian series.
    // Returns true if the series has points at all.
    hasData: function () {
        return !!this.processedXData.length; // != 0
    },
    init: function (chart, options) {
        var series = this, colorMapSeriesMixin = H.colorMapSeriesMixin;
        // If color series logic is loaded, add some properties
        if (colorMapSeriesMixin) {
            this.colorAttribs = colorMapSeriesMixin.colorAttribs;
        }
        // Handle deprecated options.
        addEvent(series, 'setOptions', function (event) {
            var options = event.userOptions;
            if (defined(options.allowDrillToNode) &&
                !defined(options.allowTraversingTree)) {
                options.allowTraversingTree = options.allowDrillToNode;
                delete options.allowDrillToNode;
            }
            if (defined(options.drillUpButton) &&
                !defined(options.traverseUpButton)) {
                options.traverseUpButton = options.drillUpButton;
                delete options.drillUpButton;
            }
        });
        Series.prototype.init.call(series, chart, options);
        if (series.options.allowTraversingTree) {
            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
        ((list[id] || [])).forEach(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
        tree.children.forEach(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.
     *
     * @private
     * @function Highcharts.Series#calculateChildrenAreas
     *
     * @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, mapOptionsToLevel = series.mapOptionsToLevel, level = mapOptionsToLevel[parent.level + 1], algorithm = pick((series[(level && level.layoutAlgorithm)] &&
            level.layoutAlgorithm), options.layoutAlgorithm), alternate = options.alternateStartingDirection, childrenValues = [], children;
        // Collect all children which should be included
        children = parent.children.filter(function (n) {
            return !n.ignore;
        });
        if (level && level.layoutStartingDirection) {
            area.direction = level.layoutStartingDirection === 'vertical' ?
                0 :
                1;
        }
        childrenValues = series[algorithm](area, children);
        children.forEach(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;
        series.points.forEach(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.
            if (!series.chart.styledMode) {
                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.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,
                mapOptionsToLevel: series.mapOptionsToLevel,
                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
            (node.children || []).forEach(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];
        }
        group.elArr.forEach(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: H.correctFloat(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(// eslint-disable-line new-cap
        parent.height, parent.width, direction, plot);
        // Loop through and calculate all areas
        children.forEach(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 // @todo no supported
                );
            }
            // If last child, then calculate all remaining areas
            if (i === end) {
                series.algorithmCalcPoints(directionChange, true, group, childrenArea, plot // @todo not supported
                );
            }
            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;
        children.forEach(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, options = series.options, 
        // NOTE: updateRootId modifies series.
        rootId = updateRootId(series), rootNode, pointValues, seriesArea, tree, val;
        // Call prototype function
        Series.prototype.translate.call(series);
        // @todo Only if series.isDirtyData is true
        tree = series.tree = series.getTree();
        rootNode = series.nodeMap[rootId];
        series.renderTraverseUpButton(rootId);
        series.mapOptionsToLevel = getLevelOptions({
            from: rootNode.level + 1,
            levels: options.levels,
            to: tree.height,
            defaults: {
                levelIsConstant: series.options.levelIsConstant,
                colorByPoint: options.colorByPoint
            }
        });
        if (rootId !== '' &&
            (!rootNode || !rootNode.children.length)) {
            series.setRootNode('', 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;
            children.forEach(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: (options.layoutStartingDirection === 'vertical' ? 0 : 1),
            val: tree.val
        });
        series.calculateChildrenAreas(tree, seriesArea);
        // Logic for point colors
        if (!series.colorAxis &&
            !options.colorByPoint) {
            series.setColorRecursive(series.tree);
        }
        // Update axis extremes according to the root node.
        if (options.allowTraversingTree) {
            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.
     *
     * @private
     * @function Highcharts.Series#drawDataLabels
     */
    drawDataLabels: function () {
        var series = this, mapOptionsToLevel = series.mapOptionsToLevel, points = series.points.filter(function (n) {
            return n.node.visible;
        }), options, level;
        points.forEach(function (point) {
            level = mapOptionsToLevel[point.node.level];
            // 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, dataLabel, labelOptions) {
        var style = labelOptions.style;
        // #8160: Prevent the label from exceeding the point's
        // boundaries in treemaps by applying ellipsis overflow.
        // The issue was happening when datalabel's text contained a
        // long sequence of characters without a whitespace.
        if (!defined(style.textOverflow) &&
            dataLabel.text &&
            dataLabel.getBBox().width > dataLabel.text.textWidth) {
            dataLabel.css({
                textOverflow: 'ellipsis',
                // unit (px) is required when useHTML is true
                width: style.width += 'px'
            });
        }
        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 series = this, mapOptionsToLevel = (isObject(series.mapOptionsToLevel) ?
            series.mapOptionsToLevel :
            {}), level = point && mapOptionsToLevel[point.node.level] || {}, 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;
    },
    // Override drawPoints
    drawPoints: function () {
        var series = this, chart = series.chart, renderer = chart.renderer, points = series.points, styledMode = chart.styledMode, options = series.options, shadow = styledMode ? {} : options.shadow, borderRadius = options.borderRadius, withinAnimationLimit = chart.pointCount < options.animationLimit, allowTraversingTree = options.allowTraversingTree;
        points.forEach(function (point) {
            var levelDynamic = point.node.levelDynamic, animate = {}, attr = {}, css = {}, groupKey = 'level-group-' + levelDynamic, hasGraphic = !!point.graphic, shouldAnimate = withinAnimationLimit && hasGraphic, shapeArgs = point.shapeArgs;
            // Don't bother with calculate styling if the point is not drawn
            if (point.shouldDraw()) {
                if (borderRadius) {
                    attr.r = borderRadius;
                }
                merge(true, // Extend object
                // Which object to extend
                shouldAnimate ? animate : attr, 
                // Add shapeArgs to animate/attr if graphic exists
                hasGraphic ? shapeArgs : {}, 
                // Add style attribs if !styleMode
                styledMode ?
                    {} :
                    series.pointAttribs(point, (point.selected && 'select')));
                // In styled mode apply point.color. Use CSS, otherwise the
                // fill used in the style sheet will take precedence over
                // the fill attribute.
                if (series.colorAttribs && styledMode) {
                    // Heatmap is loaded
                    extend(css, series.colorAttribs(point));
                }
                if (!series[groupKey]) {
                    series[groupKey] = renderer.g(groupKey)
                        .attr({
                        // @todo Set the zIndex based upon the number of
                        // levels, instead of using 1000
                        zIndex: 1000 - levelDynamic
                    })
                        .add(series.group);
                    series[groupKey].survive = true;
                }
            }
            // Draw the point
            point.draw({
                animatableAttribs: animate,
                attribs: attr,
                css: css,
                group: series[groupKey],
                renderer: renderer,
                shadow: shadow,
                shapeArgs: shapeArgs,
                shapeType: 'rect'
            });
            // If setRootNode is allowed, set a point cursor on clickables &
            // add drillId to point
            if (allowTraversingTree && point.graphic) {
                point.drillId = 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.setRootNode(drillId, true, { trigger: 'click' });
        }
    },
    /**
     * Finds the drill id for a parent node. Returns false if point should
     * not have a click event.
     *
     * @private
     * @function Highcharts.Series#drillToByGroup
     *
     * @param {Highcharts.Point} point
     *
     * @return {boolean|string}
     *         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
     *
     * @private
     * @function Highcharts.Series#drillToByLeaf
     *
     * @param {Highcharts.Point} point
     *
     * @return {boolean|string}
     *         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.setRootNode(node.parent, true, { trigger: 'traverseUpButton' });
        }
    },
    // TODO remove this function at a suitable version.
    drillToNode: function (id, redraw) {
        error('WARNING: treemap.drillToNode has been renamed to treemap.' +
            'setRootNode, and will be removed in the next major version.');
        this.setRootNode(id, redraw);
    },
    /**
     * Sets a new root node for the series.
     *
     * @private
     * @function Highcharts.Series#setRootNode
     *
     * @param {string} id The id of the new root node.
     * @param {boolean} [redraw=true] Wether to redraw the chart or not.
     * @param {object} [eventArguments] Arguments to be accessed in
     * event handler.
     * @param {string} [eventArguments.newRootId] Id of the new root.
     * @param {string} [eventArguments.previousRootId] Id of the previous
     * root.
     * @param {boolean} [eventArguments.redraw] Wether to redraw the
     * chart after.
     * @param {object} [eventArguments.series] The series to update the root
     * of.
     * @param {string} [eventArguments.trigger] The action which
     * triggered the event. Undefined if the setRootNode is called
     * directly.
     * @return {void}
     *
     * @fires Highcharts.Series#event:setRootNode
     */
    setRootNode: function (id, redraw, eventArguments) {
        var series = this, eventArgs = extend({
            newRootId: id,
            previousRootId: series.rootNode,
            redraw: pick(redraw, true),
            series: series
        }, eventArguments);
        /**
         * The default functionality of the setRootNode event.
         *
         * @private
         * @param {object} args The event arguments.
         * @param {string} args.newRootId Id of the new root.
         * @param {string} args.previousRootId Id of the previous root.
         * @param {boolean} args.redraw Wether to redraw the chart after.
         * @param {object} args.series The series to update the root of.
         * @param {string} [args.trigger=undefined] The action which
         * triggered the event. Undefined if the setRootNode is called
         * directly.
         * @return {void}
         */
        var defaultFn = function (args) {
            var series = args.series;
            // Store previous and new root ids on the series.
            series.idPreviousRoot = args.previousRootId;
            series.rootNode = args.newRootId;
            // Redraw the chart
            series.isDirty = true; // Force redraw
            if (args.redraw) {
                series.chart.redraw();
            }
        };
        // Fire setRootNode event.
        fireEvent(series, 'setRootNode', eventArgs, defaultFn);
    },
    renderTraverseUpButton: function (rootId) {
        var series = this, nodeMap = series.nodeMap, node = nodeMap[rootId], name = node.name, buttonOptions = series.options.traverseUpButton, backText = pick(buttonOptions.text, name, '< Back'), attr, states;
        if (rootId === '') {
            if (series.drillUpButton) {
                series.drillUpButton =
                    series.drillUpButton.destroy();
            }
        }
        else 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)
                .addClass('highcharts-drillup-button')
                .attr({
                align: buttonOptions.position.align,
                zIndex: 7
            })
                .add()
                .align(buttonOptions.position, false, buttonOptions.relativeTo || 'plotBox');
        }
        else {
            this.drillUpButton.placed = false;
            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);
        extend(this.yAxis.options, treeAxis);
        extend(this.xAxis.options, treeAxis);
    },
    /**
     * Workaround for `inactive` state. Since `series.opacity` option is
     * already reserved, don't use that state at all by disabling
     * `inactiveOtherPoints` and not inheriting states by points.
     *
     * @private
     */
    setState: function (state) {
        this.options.inactiveOtherPoints = true;
        Series.prototype.setState.call(this, state, false);
        this.options.inactiveOtherPoints = false;
    },
    utils: {
        recursive: recursive
    }
    /* eslint-enable no-invalid-this, valid-jsdoc */
}, {
    draw: drawPoint,
    setVisible: seriesTypes.pie.prototype.pointClass.prototype.setVisible,
    /* eslint-disable no-invalid-this, valid-jsdoc */
    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.allowTraversingTree)) {
            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.
     *
     * @private
     * @function Highcharts.Point#isValid
     */
    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
            });
        }
    },
    shouldDraw: function () {
        var point = this;
        return isNumber(point.plotY) && point.y !== null;
    }
    /* eslint-enable no-invalid-this, valid-jsdoc */
});
