/**
 * @license Highcharts JS v7.0.3 (2019-02-06)
 * Highcharts Drilldown module
 *
 * Author: Torstein Honsi
 * License: www.highcharts.com/license
 *
 */
'use strict';
(function (factory) {
    if (typeof module === 'object' && module.exports) {
        factory['default'] = factory;
        module.exports = factory;
    } else if (typeof define === 'function' && define.amd) {
        define(function () {
            return factory;
        });
    } else {
        factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
    }
}(function (Highcharts) {
    (function (H) {
        /* *
         * Highcharts Drilldown module
         *
         * Author: Torstein Honsi
         * License: www.highcharts.com/license
         *
         */

        /**
         * Gets fired when a drilldown point is clicked, before the new series is added.
         * Note that when clicking a category label to trigger multiple series
         * drilldown, one `drilldown` event is triggered per point in the category.
         *
         * @callback Highcharts.DrilldownCallbackFunction
         *
         * @param {Highcharts.Chart} this
         *        The chart where the event occurs.
         *
         * @param {Highcharts.DrilldownEventObject} e
         *        The drilldown event.
         */

        /**
         * The event arguments when a drilldown point is clicked.
         *
         * @interface Highcharts.DrilldownEventObject
         *//**
         * If a category label was clicked, which index.
         * @name Highcharts.DrilldownEventObject#category
         * @type {number|undefined}
         *//**
         * The original browser event (usually click) that triggered the drilldown.
         * @name Highcharts.DrilldownEventObject#originalEvent
         * @type {global.Event|undefined}
         *//**
         * Prevents the default behaviour of the event.
         * @name Highcharts.DrilldownEventObject#preventDefault
         * @type {Function}
         *//**
         * The originating point.
         * @name Highcharts.DrilldownEventObject#point
         * @type {Highcharts.Point}
         *//**
         * If a category label was clicked, this array holds all points corresponing to
         * the category. Otherwise it is set to false.
         * @name Highcharts.DrilldownEventObject#points
         * @type {boolean|Array<Highcharts.Point>|undefined}
         *//**
         * Options for the new series. If the event is utilized for async drilldown, the
         * seriesOptions are not added, but rather loaded async.
         * @name Highcharts.DrilldownEventObject#seriesOptions
         * @type {Highcharts.SeriesOptionsType|undefined}
         *//**
         * The event target.
         * @name Highcharts.DrilldownEventObject#target
         * @type {Highcharts.Chart}
         *//**
         * The event type.
         * @name Highcharts.DrilldownEventObject#type
         * @type {"drilldown"}
         */

        /**
         * This gets fired after all the series have been drilled up. This is especially
         * usefull in a chart with multiple drilldown series.
         *
         * @callback Highcharts.DrillupAllCallbackFunction
         *
         * @param {Highcharts.Chart} this
         *        The chart where the event occurs.
         *
         * @param {Highcharts.DrillupAllEventObject} e
         *        The final drillup event.
         */

        /**
         * The event arguments when all the series have been drilled up.
         *
         * @interface Highcharts.DrillupAllEventObject
         *//**
         * Prevents the default behaviour of the event.
         * @name Highcharts.DrillupAllEventObject#preventDefault
         * @type {Function}
         *//**
         * The event target.
         * @name Highcharts.DrillupAllEventObject#target
         * @type {Highcharts.Chart}
         *//**
         * The event type.
         * @name Highcharts.DrillupAllEventObject#type
         * @type {"drillupall"}
         */

        /**
         * Gets fired when drilling up from a drilldown series.
         *
         * @callback Highcharts.DrillupCallbackFunction
         *
         * @param {Highcharts.Chart} this
         *        The chart where the event occurs.
         *
         * @param {Highcharts.DrillupEventObject} e
         *        The drillup event.
         */

        /**
         * The event arguments when drilling up from a drilldown series.
         *
         * @interface Highcharts.DrillupEventObject
         *//**
         * Prevents the default behaviour of the event.
         * @name Highcharts.DrillupEventObject#preventDefault
         * @type {Function}
         *//**
         * Options for the new series.
         * @name Highcharts.DrillupEventObject#seriesOptions
         * @type {Highcharts.SeriesOptionsType|undefined}
         *//**
         * The event target.
         * @name Highcharts.DrillupEventObject#target
         * @type {Highcharts.Chart}
         *//**
         * The event type.
         * @name Highcharts.DrillupEventObject#type
         * @type {"drillup"}
         */



        var animObject = H.animObject,
            noop = H.noop,
            color = H.color,
            defaultOptions = H.defaultOptions,
            extend = H.extend,
            format = H.format,
            objectEach = H.objectEach,
            pick = H.pick,
            Chart = H.Chart,
            seriesTypes = H.seriesTypes,
            PieSeries = seriesTypes.pie,
            ColumnSeries = seriesTypes.column,
            Tick = H.Tick,
            fireEvent = H.fireEvent,
            ddSeriesId = 1;

        // Add language
        extend(
            defaultOptions.lang,
            /**
             * @optionparent lang
             */
            {
                /**
                 * The text for the button that appears when drilling down, linking back
                 * to the parent series. The parent series' name is inserted for
                 * `{series.name}`.
                 *
                 * @since   3.0.8
                 * @product highcharts highmaps
                 */
                drillUpText: '◁ Back to {series.name}'
            }
        );

        /**
         * Options for drill down, the concept of inspecting increasingly high
         * resolution data through clicking on chart items like columns or pie slices.
         *
         * The drilldown feature requires the drilldown.js file to be loaded,
         * found in the modules directory of the download package, or online at
         * [code.highcharts.com/modules/drilldown.js
         * ](code.highcharts.com/modules/drilldown.js).
         *
         * @product      highcharts highstock highmaps
         * @optionparent drilldown
         */
        defaultOptions.drilldown = {

            /**
             * When this option is false, clicking a single point will drill down
             * all points in the same category, equivalent to clicking the X axis
             * label.
             *
             * @sample {highcharts} highcharts/drilldown/allowpointdrilldown-false/
             *         Don't allow point drilldown
             *
             * @type      {boolean}
             * @default   true
             * @since     4.1.7
             * @product   highcharts
             * @apioption drilldown.allowPointDrilldown
             */

            /**
             * An array of series configurations for the drill down. Each series
             * configuration uses the same syntax as the [series](#series) option set.
             * These drilldown series are hidden by default. The drilldown series is
             * linked to the parent series' point by its `id`.
             *
             * @type      {Array<Highcharts.SeriesOptionsType>}
             * @since     3.0.8
             * @product   highcharts highmaps
             * @apioption drilldown.series
             */

            /**
             * Additional styles to apply to the X axis label for a point that
             * has drilldown data. By default it is underlined and blue to invite
             * to interaction.
             *
             * In styled mode, active label styles can be set with the
             * `.highcharts-drilldown-axis-label` class.
             *
             * @sample {highcharts} highcharts/drilldown/labels/
             *         Label styles
             *
             * @type    {Highcharts.CSSObject}
             * @default { "cursor": "pointer", "color": "#003399", "fontWeight": "bold", "textDecoration": "underline" }
             * @since   3.0.8
             * @product highcharts highmaps
             */
            activeAxisLabelStyle: {
                /** @ignore-option */
                cursor: 'pointer',
                /** @ignore-option */
                color: '#003399',
                /** @ignore-option */
                fontWeight: 'bold',
                /** @ignore-option */
                textDecoration: 'underline'
            },

            /**
             * Additional styles to apply to the data label of a point that has
             * drilldown data. By default it is underlined and blue to invite to
             * interaction.
             *
             * In styled mode, active data label styles can be applied with the
             * `.highcharts-drilldown-data-label` class.
             *
             * @sample {highcharts} highcharts/drilldown/labels/
             *         Label styles
             *
             * @type    {Highcharts.CSSObject}
             * @default { "cursor": "pointer", "color": "#003399", "fontWeight": "bold", "textDecoration": "underline" }
             * @since   3.0.8
             * @product highcharts highmaps
             */
            activeDataLabelStyle: {
                cursor: 'pointer',
                color: '#003399',
                fontWeight: 'bold',
                textDecoration: 'underline'
            },

            /**
             * Set the animation for all drilldown animations. Animation of a drilldown
             * occurs when drilling between a column point and a column series,
             * or a pie slice and a full pie series. Drilldown can still be used
             * between series and points of different types, but animation will
             * not occur.
             *
             * The animation can either be set as a boolean or a configuration
             * object. If `true`, it will use the 'swing' jQuery easing and a duration
             * of 500 ms. If used as a configuration object, the following properties
             * are supported:
             *
             * - `duration`: The duration of the animation in milliseconds.
             *
             * - `easing`: A string reference to an easing function set on the `Math`
             *   object. See
             *   [the easing demo](https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/plotoptions/series-animation-easing/).
             *
             * @type    {boolean|Highcharts.AnimationOptionsObject}
             * @default { "duration": 500 }
             * @since   3.0.8
             * @product highcharts highmaps
             */
            animation: {
                /** @ignore-option */
                duration: 500
            },

            /**
             * Options for the drill up button that appears when drilling down on a
             * series. The text for the button is defined in
             * [lang.drillUpText](#lang.drillUpText).
             *
             * @sample {highcharts} highcharts/drilldown/drillupbutton/
             *         Drill up button
             * @sample {highmaps} highcharts/drilldown/drillupbutton/
             *         Drill up button
             *
             * @since   3.0.8
             * @product highcharts highmaps
             */
            drillUpButton: {
                /**
                 * What box to align the button to. Can be either `plotBox` or
                 * `spacingBox`.
                 *
                 * @type       {string}
                 * @default    plotBox
                 * @since      3.0.8
                 * @product    highcharts highmaps
                 * @validvalue ["plotBox", "spacingBox"]
                 * @apioption  drilldown.drillUpButton.relativeTo
                 */

                /**
                 * A collection of attributes for the button. The object takes SVG
                 * attributes like `fill`, `stroke`, `stroke-width` or `r`, the border
                 * radius. The theme also supports `style`, a collection of CSS
                 * properties for the text. Equivalent attributes for the hover state
                 * are given in `theme.states.hover`.
                 *
                 * In styled mode, drill-up button styles can be applied with the
                 * `.highcharts-drillup-button` class.
                 *
                 * @sample {highcharts} highcharts/drilldown/drillupbutton/
                 *         Button theming
                 * @sample {highmaps} highcharts/drilldown/drillupbutton/
                 *         Button theming
                 *
                 * @type      {object}
                 * @since     3.0.8
                 * @product   highcharts highmaps
                 * @apioption drilldown.drillUpButton.theme
                 */

                /**
                 * Positioning options for the button within the `relativeTo` box.
                 * Available properties are `x`, `y`, `align` and `verticalAlign`.
                 *
                 * @type    {Highcharts.AlignObject}
                 * @since   3.0.8
                 * @product highcharts highmaps
                 */
                position: {

                    /**
                     * Vertical alignment of the button.
                     *
                     * @type      {Highcharts.VerticalAlignType}
                     * @default   top
                     * @product   highcharts highmaps
                     * @apioption drilldown.drillUpButton.position.verticalAlign
                     */

                    /**
                     * Horizontal alignment.
                     *
                     * @type {Highcharts.AlignType}
                     */
                    align: 'right',

                    /**
                     * The X offset of the button.
                     */
                    x: -10,

                    /**
                     * The Y offset of the button.
                     */
                    y: 10
                }
            }
        };


        /**
         * Fires when a drilldown point is clicked, before the new series is added. This
         * event is also utilized for async drilldown, where the seriesOptions are not
         * added by option, but rather loaded async. Note that when clicking a category
         * label to trigger multiple series drilldown, one `drilldown` event is
         * triggered per point in the category.
         *
         * Event arguments:
         *
         * - `category`: If a category label was clicked, which index.</dd>
         *
         * - `originalEvent`: The original browser event (usually click) that triggered
         *   the drilldown.
         *
         * - `point`: The originating point.
         *
         * - `points`: If a category label was clicked, this array holds all points
         *   corresponing to the category.</dd>
         *
         * - `seriesOptions`: Options for the new series.
         *
         * @sample {highcharts} highcharts/drilldown/async/
         *         Async drilldown
         *
         * @type      {Highcharts.DrilldownCallbackFunction}
         * @since     3.0.8
         * @product   highcharts highmaps
         * @context   Highcharts.Chart
         * @apioption chart.events.drilldown
         */

        /**
         * Fires when drilling up from a drilldown series.
         *
         * @type      {Highcharts.DrillupCallbackFunction}
         * @since     3.0.8
         * @product   highcharts highmaps
         * @context   Highcharts.Chart
         * @apioption chart.events.drillup
         */

        /**
         * In a chart with multiple drilldown series, this event fires after all the
         * series have been drilled up.
         *
         * @type      {Highcharts.DrillupAllCallbackFunction}
         * @since     4.2.4
         * @product   highcharts highmaps
         * @context   Highcharts.Chart
         * @apioption chart.events.drillupall
         */

        /**
         * The `id` of a series in the [drilldown.series](#drilldown.series) array to
         * use for a drilldown for this point.
         *
         * @sample {highcharts} highcharts/drilldown/basic/
         *         Basic drilldown
         *
         * @type      {string}
         * @since     3.0.8
         * @product   highcharts
         * @apioption series.line.data.drilldown
         */

        /**
         * A general fadeIn method.
         *
         * @requires module:modules/drilldown
         *
         * @function Highcharts.SVGElement#fadeIn
         *
         * @param {Highcharts.AnimationOptionsObject} [animation]
         */
        H.SVGRenderer.prototype.Element.prototype.fadeIn = function (animation) {
            this
                .attr({
                    opacity: 0.1,
                    visibility: 'inherit'
                })
                .animate({
                    opacity: pick(this.newOpacity, 1) // newOpacity used in maps
                }, animation || {
                    duration: 250
                });
        };

        /**
         * Add a series to the chart as drilldown from a specific point in the parent
         * series. This method is used for async drilldown, when clicking a point in a
         * series should result in loading and displaying a more high-resolution series.
         * When not async, the setup is simpler using the
         * [drilldown.series](https://api.highcharts.com/highcharts/drilldown.series)
         * options structure.
         *
         * @sample highcharts/drilldown/async/
         *         Async drilldown
         *
         * @function Highcharts.Chart#addSeriesAsDrilldown
         *
         * @param {Highcharts.Point} point
         *        The point from which the drilldown will start.
         *
         * @param {Highcharts.SeriesOptionsType} options
         *        The series options for the new, detailed series.
         */
        Chart.prototype.addSeriesAsDrilldown = function (point, options) {
            this.addSingleSeriesAsDrilldown(point, options);
            this.applyDrilldown();
        };
        Chart.prototype.addSingleSeriesAsDrilldown = function (point, ddOptions) {
            var oldSeries = point.series,
                xAxis = oldSeries.xAxis,
                yAxis = oldSeries.yAxis,
                newSeries,
                pointIndex,
                levelSeries = [],
                levelSeriesOptions = [],
                level,
                levelNumber,
                last,
                colorProp;


            colorProp = this.styledMode ?
                { colorIndex: pick(point.colorIndex, oldSeries.colorIndex) } :
                { color: point.color || oldSeries.color };

            if (!this.drilldownLevels) {
                this.drilldownLevels = [];
            }

            levelNumber = oldSeries.options._levelNumber || 0;

            // See if we can reuse the registered series from last run
            last = this.drilldownLevels[this.drilldownLevels.length - 1];
            if (last && last.levelNumber !== levelNumber) {
                last = undefined;
            }

            ddOptions = extend(extend({
                _ddSeriesId: ddSeriesId++
            }, colorProp), ddOptions);
            pointIndex = oldSeries.points.indexOf(point);

            // Record options for all current series
            oldSeries.chart.series.forEach(function (series) {
                if (series.xAxis === xAxis && !series.isDrilling) {
                    series.options._ddSeriesId =
                        series.options._ddSeriesId || ddSeriesId++;
                    series.options._colorIndex = series.userOptions._colorIndex;
                    series.options._levelNumber =
                        series.options._levelNumber || levelNumber; // #3182

                    if (last) {
                        levelSeries = last.levelSeries;
                        levelSeriesOptions = last.levelSeriesOptions;
                    } else {
                        levelSeries.push(series);
                        levelSeriesOptions.push(series.options);
                    }
                }
            });

            // Add a record of properties for each drilldown level
            level = extend({
                levelNumber: levelNumber,
                seriesOptions: oldSeries.options,
                levelSeriesOptions: levelSeriesOptions,
                levelSeries: levelSeries,
                shapeArgs: point.shapeArgs,
                // no graphic in line series with markers disabled
                bBox: point.graphic ? point.graphic.getBBox() : {},
                color: point.isNull ? new H.Color(color).setOpacity(0).get() : color,
                lowerSeriesOptions: ddOptions,
                pointOptions: oldSeries.options.data[pointIndex],
                pointIndex: pointIndex,
                oldExtremes: {
                    xMin: xAxis && xAxis.userMin,
                    xMax: xAxis && xAxis.userMax,
                    yMin: yAxis && yAxis.userMin,
                    yMax: yAxis && yAxis.userMax
                },
                resetZoomButton: this.resetZoomButton
            }, colorProp);

            // Push it to the lookup array
            this.drilldownLevels.push(level);

            // Reset names to prevent extending (#6704)
            if (xAxis && xAxis.names) {
                xAxis.names.length = 0;
            }

            newSeries = level.lowerSeries = this.addSeries(ddOptions, false);
            newSeries.options._levelNumber = levelNumber + 1;
            if (xAxis) {
                xAxis.oldPos = xAxis.pos;
                xAxis.userMin = xAxis.userMax = null;
                yAxis.userMin = yAxis.userMax = null;
            }

            // Run fancy cross-animation on supported and equal types
            if (oldSeries.type === newSeries.type) {
                newSeries.animate = newSeries.animateDrilldown || noop;
                newSeries.options.animation = true;
            }
        };

        Chart.prototype.applyDrilldown = function () {
            var drilldownLevels = this.drilldownLevels,
                levelToRemove;

            if (drilldownLevels && drilldownLevels.length > 0) { // #3352, async loading
                levelToRemove = drilldownLevels[drilldownLevels.length - 1].levelNumber;
                this.drilldownLevels.forEach(function (level) {
                    if (level.levelNumber === levelToRemove) {
                        level.levelSeries.forEach(function (series) {
                            // Not removed, not added as part of a multi-series
                            // drilldown
                            if (
                                series.options &&
                                series.options._levelNumber === levelToRemove
                            ) {
                                series.remove(false);
                            }
                        });
                    }
                });
            }

            // We have a reset zoom button. Hide it and detatch it from the chart. It
            // is preserved to the layer config above.
            if (this.resetZoomButton) {
                this.resetZoomButton.hide();
                delete this.resetZoomButton;
            }

            this.pointer.reset();
            this.redraw();
            this.showDrillUpButton();
        };

        Chart.prototype.getDrilldownBackText = function () {
            var drilldownLevels = this.drilldownLevels,
                lastLevel;

            if (drilldownLevels && drilldownLevels.length > 0) { // #3352, async loading
                lastLevel = drilldownLevels[drilldownLevels.length - 1];
                lastLevel.series = lastLevel.seriesOptions;
                return format(this.options.lang.drillUpText, lastLevel);
            }

        };

        Chart.prototype.showDrillUpButton = function () {
            var chart = this,
                backText = this.getDrilldownBackText(),
                buttonOptions = chart.options.drilldown.drillUpButton,
                attr,
                states;


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

                this.drillUpButton = this.renderer.button(
                    backText,
                    null,
                    null,
                    function () {
                        chart.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.attr({
                    text: backText
                })
                    .align();
            }
        };

        /**
         * When the chart is drilled down to a child series, calling `chart.drillUp()`
         * will drill up to the parent series. Requires the drilldown module.
         *
         * @function Highcharts.Chart#drillUp
         */
        Chart.prototype.drillUp = function () {
            if (!this.drilldownLevels || this.drilldownLevels.length === 0) {
                return;
            }

            var chart = this,
                drilldownLevels = chart.drilldownLevels,
                levelNumber = drilldownLevels[drilldownLevels.length - 1].levelNumber,
                i = drilldownLevels.length,
                chartSeries = chart.series,
                seriesI,
                level,
                oldSeries,
                newSeries,
                oldExtremes,
                addSeries = function (seriesOptions) {
                    var addedSeries;

                    chartSeries.forEach(function (series) {
                        if (series.options._ddSeriesId === seriesOptions._ddSeriesId) {
                            addedSeries = series;
                        }
                    });

                    addedSeries = addedSeries || chart.addSeries(seriesOptions, false);
                    if (
                        addedSeries.type === oldSeries.type &&
                        addedSeries.animateDrillupTo
                    ) {
                        addedSeries.animate = addedSeries.animateDrillupTo;
                    }
                    if (seriesOptions === level.seriesOptions) {
                        newSeries = addedSeries;
                    }
                };

            while (i--) {

                level = drilldownLevels[i];
                if (level.levelNumber === levelNumber) {
                    drilldownLevels.pop();

                    // Get the lower series by reference or id
                    oldSeries = level.lowerSeries;
                    if (!oldSeries.chart) { // #2786
                        seriesI = chartSeries.length; // #2919
                        while (seriesI--) {
                            if (
                                chartSeries[seriesI].options.id ===
                                    level.lowerSeriesOptions.id &&
                                chartSeries[seriesI].options._levelNumber ===
                                    levelNumber + 1
                            ) { // #3867
                                oldSeries = chartSeries[seriesI];
                                break;
                            }
                        }
                    }
                    oldSeries.xData = []; // Overcome problems with minRange (#2898)

                    level.levelSeriesOptions.forEach(addSeries);

                    fireEvent(chart, 'drillup', { seriesOptions: level.seriesOptions });

                    if (newSeries.type === oldSeries.type) {
                        newSeries.drilldownLevel = level;
                        newSeries.options.animation = chart.options.drilldown.animation;

                        if (oldSeries.animateDrillupFrom && oldSeries.chart) { // #2919
                            oldSeries.animateDrillupFrom(level);
                        }
                    }
                    newSeries.options._levelNumber = levelNumber;

                    oldSeries.remove(false);

                    // Reset the zoom level of the upper series
                    if (newSeries.xAxis) {
                        oldExtremes = level.oldExtremes;
                        newSeries.xAxis.setExtremes(
                            oldExtremes.xMin,
                            oldExtremes.xMax,
                            false
                        );
                        newSeries.yAxis.setExtremes(
                            oldExtremes.yMin,
                            oldExtremes.yMax,
                            false
                        );
                    }

                    // We have a resetZoomButton tucked away for this level. Attatch
                    // it to the chart and show it.
                    if (level.resetZoomButton) {
                        chart.resetZoomButton = level.resetZoomButton;
                        chart.resetZoomButton.show();
                    }
                }
            }

            // Fire a once-off event after all series have been drilled up (#5158)
            fireEvent(chart, 'drillupall');

            this.redraw();

            if (this.drilldownLevels.length === 0) {
                this.drillUpButton = this.drillUpButton.destroy();
            } else {
                this.drillUpButton.attr({
                    text: this.getDrilldownBackText()
                })
                    .align();
            }

            this.ddDupes.length = []; // #3315
        };

        // Add update function to be called internally from Chart.update (#7600)
        Chart.prototype.callbacks.push(function () {
            var chart = this;

            chart.drilldown = {
                update: function (options, redraw) {
                    H.merge(true, chart.options.drilldown, options);
                    if (pick(redraw, true)) {
                        chart.redraw();
                    }
                }
            };
        });

        // Don't show the reset button if we already are displaying the drillUp button.
        H.addEvent(Chart, 'beforeShowResetZoom', function () {
            if (this.drillUpButton) {
                return false;
            }
        });
        H.addEvent(Chart, 'render', function setDDPoints() {
            (this.xAxis || []).forEach(function (axis) {
                axis.ddPoints = {};
                axis.series.forEach(function (series) {
                    var i,
                        xData = series.xData || [],
                        points = series.points,
                        p;

                    for (i = 0; i < xData.length; i++) {
                        p = series.options.data[i];

                        // The `drilldown` property can only be set on an array or an
                        // object
                        if (typeof p !== 'number') {

                            // Convert array to object (#8008)
                            p = series.pointClass.prototype.optionsToObject
                                .call({ series: series }, p);

                            if (p.drilldown) {
                                if (!axis.ddPoints[xData[i]]) {
                                    axis.ddPoints[xData[i]] = [];
                                }
                                axis.ddPoints[xData[i]].push(points ? points[i] : true);
                            }
                        }
                    }
                });

                // Add drillability to ticks, and always keep it drillability updated
                // (#3951)
                objectEach(axis.ticks, Tick.prototype.drillable);
            });
        });


        /**
         * When drilling up, keep the upper series invisible until the lower series has
         * moved into place.
         *
         * @private
         * @function Highcharts.ColumnSeries#animateDrillupTo
         *
         * @param {boolean} [init=false]
         */
        ColumnSeries.prototype.animateDrillupTo = function (init) {
            if (!init) {
                var newSeries = this,
                    level = newSeries.drilldownLevel;

                // First hide all items before animating in again
                this.points.forEach(function (point) {
                    var dataLabel = point.dataLabel;

                    if (point.graphic) { // #3407
                        point.graphic.hide();
                    }

                    if (dataLabel) {
                        // The data label is initially hidden, make sure it is not faded
                        // in (#6127)
                        dataLabel.hidden = dataLabel.attr('visibility') === 'hidden';

                        if (!dataLabel.hidden) {
                            dataLabel.hide();
                            if (point.connector) {
                                point.connector.hide();
                            }
                        }
                    }
                });


                // Do dummy animation on first point to get to complete
                H.syncTimeout(function () {
                    if (newSeries.points) { // May be destroyed in the meantime, #3389
                        newSeries.points.forEach(function (point, i) {
                            // Fade in other points
                            var verb =
                                i === (level && level.pointIndex) ? 'show' : 'fadeIn',
                                inherit = verb === 'show' ? true : undefined,
                                dataLabel = point.dataLabel;


                            if (point.graphic) { // #3407
                                point.graphic[verb](inherit);
                            }

                            if (dataLabel && !dataLabel.hidden) { // #6127
                                dataLabel.fadeIn(); // #7384
                                if (point.connector) {
                                    point.connector.fadeIn();
                                }
                            }
                        });
                    }
                }, Math.max(this.chart.options.drilldown.animation.duration - 50, 0));

                // Reset
                this.animate = noop;
            }

        };

        ColumnSeries.prototype.animateDrilldown = function (init) {
            var series = this,
                chart = this.chart,
                drilldownLevels = chart.drilldownLevels,
                animateFrom,
                animationOptions = animObject(chart.options.drilldown.animation),
                xAxis = this.xAxis,
                styledMode = chart.styledMode;

            if (!init) {
                drilldownLevels.forEach(function (level) {
                    if (
                        series.options._ddSeriesId ===
                            level.lowerSeriesOptions._ddSeriesId
                    ) {
                        animateFrom = level.shapeArgs;
                        if (!styledMode) {
                            // Add the point colors to animate from
                            animateFrom.fill = level.color;
                        }
                    }
                });

                animateFrom.x += (pick(xAxis.oldPos, xAxis.pos) - xAxis.pos);

                this.points.forEach(function (point) {
                    var animateTo = point.shapeArgs;

                    if (!styledMode) {
                        // Add the point colors to animate to
                        animateTo.fill = point.color;
                    }

                    if (point.graphic) {
                        point.graphic
                            .attr(animateFrom)
                            .animate(
                                extend(
                                    point.shapeArgs,
                                    { fill: point.color || series.color }
                                ),
                                animationOptions
                            );
                    }
                    if (point.dataLabel) {
                        point.dataLabel.fadeIn(animationOptions);
                    }
                });
                this.animate = null;
            }

        };

        /**
         * When drilling up, pull out the individual point graphics from the lower
         * series and animate them into the origin point in the upper series.
         *
         * @private
         * @function Highcharts.ColumnSeries#animateDrillupFrom
         *
         * @param {object} level
         */
        ColumnSeries.prototype.animateDrillupFrom = function (level) {
            var animationOptions = animObject(this.chart.options.drilldown.animation),
                group = this.group,
                // For 3d column series all columns are added to one group
                // so we should not delete the whole group. #5297
                removeGroup = group !== this.chart.columnGroup,
                series = this;

            // Cancel mouse events on the series group (#2787)
            series.trackerGroups.forEach(function (key) {
                if (series[key]) { // we don't always have dataLabelsGroup
                    series[key].on('mouseover');
                }
            });

            if (removeGroup) {
                delete this.group;
            }

            this.points.forEach(function (point) {
                var graphic = point.graphic,
                    animateTo = level.shapeArgs,
                    complete = function () {
                        graphic.destroy();
                        if (group && removeGroup) {
                            group = group.destroy();
                        }
                    };

                if (graphic) {

                    delete point.graphic;

                    if (!series.chart.styledMode) {
                        animateTo.fill = level.color;
                    }

                    if (animationOptions.duration) {
                        graphic.animate(
                            animateTo,
                            H.merge(animationOptions, { complete: complete })
                        );
                    } else {
                        graphic.attr(animateTo);
                        complete();
                    }
                }
            });
        };

        if (PieSeries) {
            extend(PieSeries.prototype, {
                animateDrillupTo: ColumnSeries.prototype.animateDrillupTo,
                animateDrillupFrom: ColumnSeries.prototype.animateDrillupFrom,

                animateDrilldown: function (init) {
                    var level = this.chart.drilldownLevels[
                            this.chart.drilldownLevels.length - 1
                        ],
                        animationOptions = this.chart.options.drilldown.animation,
                        animateFrom = level.shapeArgs,
                        start = animateFrom.start,
                        angle = animateFrom.end - start,
                        startAngle = angle / this.points.length,
                        styledMode = this.chart.styledMode;

                    if (!init) {
                        this.points.forEach(function (point, i) {
                            var animateTo = point.shapeArgs;

                            if (!styledMode) {
                                animateFrom.fill = level.color;
                                animateTo.fill = point.color;
                            }

                            if (point.graphic) {
                                point.graphic
                                    .attr(H.merge(animateFrom, {
                                        start: start + i * startAngle,
                                        end: start + (i + 1) * startAngle
                                    }))[animationOptions ? 'animate' : 'attr'](
                                        animateTo,
                                        animationOptions
                                    );
                            }
                        });
                        this.animate = null;
                    }
                }
            });
        }

        H.Point.prototype.doDrilldown = function (
            _holdRedraw,
            category,
            originalEvent
        ) {
            var series = this.series,
                chart = series.chart,
                drilldown = chart.options.drilldown,
                i = (drilldown.series || []).length,
                seriesOptions;

            if (!chart.ddDupes) {
                chart.ddDupes = [];
            }

            while (i-- && !seriesOptions) {
                if (
                    drilldown.series[i].id === this.drilldown &&
                    chart.ddDupes.indexOf(this.drilldown) === -1
                ) {
                    seriesOptions = drilldown.series[i];
                    chart.ddDupes.push(this.drilldown);
                }
            }

            // Fire the event. If seriesOptions is undefined, the implementer can check
            // for  seriesOptions, and call addSeriesAsDrilldown async if necessary.
            fireEvent(chart, 'drilldown', {
                point: this,
                seriesOptions: seriesOptions,
                category: category,
                originalEvent: originalEvent,
                points: (
                    category !== undefined &&
                    this.series.xAxis.getDDPoints(category).slice(0)
                )
            }, function (e) {
                var chart = e.point.series && e.point.series.chart,
                    seriesOptions = e.seriesOptions;

                if (chart && seriesOptions) {
                    if (_holdRedraw) {
                        chart.addSingleSeriesAsDrilldown(e.point, seriesOptions);
                    } else {
                        chart.addSeriesAsDrilldown(e.point, seriesOptions);
                    }
                }
            });


        };

        /**
         * Drill down to a given category. This is the same as clicking on an axis
         * label.
         *
         * @private
         * @function Highcharts.Axis#drilldownCategory
         */
        H.Axis.prototype.drilldownCategory = function (x, e) {
            objectEach(this.getDDPoints(x), function (point) {
                if (
                    point &&
                    point.series &&
                    point.series.visible &&
                    point.doDrilldown
                ) { // #3197
                    point.doDrilldown(true, x, e);
                }
            });
            this.chart.applyDrilldown();
        };

        /**
         * Return drillable points for this specific X value.
         *
         * @private
         * @function Highcharts.Axis#getDDPoints
         */
        H.Axis.prototype.getDDPoints = function (x) {
            return this.ddPoints && this.ddPoints[x];
        };


        /**
         * Make a tick label drillable, or remove drilling on update.
         *
         * @private
         * @function Highcharts.Axis#drillable
         */
        Tick.prototype.drillable = function () {
            var pos = this.pos,
                label = this.label,
                axis = this.axis,
                isDrillable = axis.coll === 'xAxis' && axis.getDDPoints,
                ddPointsX = isDrillable && axis.getDDPoints(pos),
                styledMode = axis.chart.styledMode;

            if (isDrillable) {
                if (label && ddPointsX && ddPointsX.length) {
                    label.drillable = true;

                    if (!label.basicStyles && !styledMode) {
                        label.basicStyles = H.merge(label.styles);
                    }

                    label
                        .addClass('highcharts-drilldown-axis-label')
                        .on('click', function (e) {
                            axis.drilldownCategory(pos, e);
                        });

                    if (!styledMode) {
                        label.css(axis.chart.options.drilldown.activeAxisLabelStyle);
                    }

                } else if (label && label.drillable) {

                    if (!styledMode) {
                        label.styles = {}; // reset for full overwrite of styles
                        label.css(label.basicStyles);
                    }

                    label.on('click', null); // #3806
                    label.removeClass('highcharts-drilldown-axis-label');
                }
            }
        };


        // On initialization of each point, identify its label and make it clickable.
        // Also, provide a list of points associated to that label.
        H.addEvent(H.Point, 'afterInit', function () {
            var point = this,
                series = point.series;

            if (point.drilldown) {

                // Add the click event to the point
                H.addEvent(point, 'click', function (e) {
                    if (
                        series.xAxis &&
                        series.chart.options.drilldown.allowPointDrilldown === false
                    ) {
                        series.xAxis.drilldownCategory(point.x, e); // #5822, x changed
                    } else {
                        point.doDrilldown(undefined, undefined, e);
                    }
                });

            }

            return point;
        });

        H.addEvent(H.Series, 'afterDrawDataLabels', function () {
            var css = this.chart.options.drilldown.activeDataLabelStyle,
                renderer = this.chart.renderer,
                styledMode = this.chart.styledMode;

            this.points.forEach(function (point) {
                var dataLabelsOptions = point.options.dataLabels,
                    pointCSS = pick(
                        point.dlOptions,
                        dataLabelsOptions && dataLabelsOptions.style,
                        {}
                    );

                if (point.drilldown && point.dataLabel) {

                    if (css.color === 'contrast' && !styledMode) {
                        pointCSS.color = renderer.getContrast(
                            point.color || this.color
                        );
                    }

                    if (dataLabelsOptions && dataLabelsOptions.color) {
                        pointCSS.color = dataLabelsOptions.color;
                    }
                    point.dataLabel
                        .addClass('highcharts-drilldown-data-label');

                    if (!styledMode) {
                        point.dataLabel
                            .css(css)
                            .css(pointCSS);
                    }
                }
            }, this);
        });


        var applyCursorCSS = function (element, cursor, addClass, styledMode) {
            element[addClass ? 'addClass' : 'removeClass'](
                'highcharts-drilldown-point'
            );

            if (!styledMode) {
                element.css({ cursor: cursor });
            }
        };

        // Mark the trackers with a pointer
        H.addEvent(H.Series, 'afterDrawTracker', function () {
            var styledMode = this.chart.styledMode;

            this.points.forEach(function (point) {
                if (point.drilldown && point.graphic) {
                    applyCursorCSS(point.graphic, 'pointer', true, styledMode);
                }
            });
        });


        H.addEvent(H.Point, 'afterSetState', function () {
            var styledMode = this.series.chart.styledMode;

            if (this.drilldown && this.series.halo && this.state === 'hover') {
                applyCursorCSS(this.series.halo, 'pointer', true, styledMode);
            } else if (this.series.halo) {
                applyCursorCSS(this.series.halo, 'auto', false, styledMode);
            }
        });

    }(Highcharts));
    return (function () {


    }());
}));
