/**
 * @license Highcharts JS v6.0.4 (2017-12-15)
 *
 * (c) 2009-2017 Torstein Honsi
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function(factory) {
    if (typeof module === 'object' && module.exports) {
        module.exports = factory;
    } else {
        factory(Highcharts);
    }
}(function(Highcharts) {
    (function(H) {
        /**
         * (c) 2010-2017 Torstein Honsi
         *
         * License: www.highcharts.com/license
         */
        var Axis = H.Axis,
            Chart = H.Chart,
            color = H.color,
            ColorAxis,
            each = H.each,
            extend = H.extend,
            isNumber = H.isNumber,
            Legend = H.Legend,
            LegendSymbolMixin = H.LegendSymbolMixin,
            noop = H.noop,
            merge = H.merge,
            pick = H.pick,
            wrap = H.wrap;

        // If ColorAxis already exists, we may be loading the heatmap module on top of
        // Highmaps.
        if (!H.ColorAxis) {

            /**
             * The ColorAxis object for inclusion in gradient legends
             */
            ColorAxis = H.ColorAxis = function() {
                this.init.apply(this, arguments);
            };
            extend(ColorAxis.prototype, Axis.prototype);
            extend(ColorAxis.prototype, {
                /**
                 * A color axis for choropleth maps and heat maps. Visually, the color axis
                 * will appear as a gradient or as separate items inside the legend,
                 * depending on whether the axis is scalar or based on data classes.
                 *
                 * For supported color formats, see the 
                 * [docs article about colors](http://www.highcharts.com/docs/chart-design-and-style/colors).
                 *
                 * A scalar color axis is represented by a gradient. The colors either range
                 * between the [minColor](#colorAxis.minColor) and the [maxColor](#colorAxis.maxColor),
                 * or for more fine grained control the colors can be
                 * defined in [stops](#colorAxis.stops). Often times, the color axis needs
                 * to be adjusted to get the right color spread for the data. In addition to
                 * stops, consider using a logarithmic [axis type](#colorAxis.type), or
                 * setting [min](#colorAxis.min) and [max](#colorAxis.max) to avoid the
                 * colors being determined by outliers.
                 *
                 * When [dataClasses](#colorAxis.dataClasses) are used, the ranges are
                 * subdivided into separate classes like categories based on their values.
                 * This can be used for ranges between two values, but also for a true
                 * category. However, when your data is categorized, it may be as convenient
                 * to add each category to a separate series.
                 *
                 * See [the Axis object](#Axis) for programmatic access to the axis.
                 * @extends {xAxis}
                 * @excluding allowDecimals,alternateGridColor,breaks,categories,crosshair,
                 *            dateTimeLabelFormats,lineWidth,linkedTo,maxZoom,minRange,
                 *            minTickInterval,offset,opposite,plotBands,plotLines,showEmpty,
                 *            title
                 * @product highcharts highmaps
                 * @optionparent colorAxis
                 */
                defaultColorAxisOptions: {

                    /**
                     * Whether to allow decimals on the color axis.
                     * @type {Boolean}
                     * @default true
                     * @product highcharts highmaps
                     * @apioption colorAxis.allowDecimals
                     */

                    /**
                     * Determines how to set each data class' color if no individual color
                     * is set. The default value, `tween`, computes intermediate colors
                     * between `minColor` and `maxColor`. The other possible value, `category`,
                     * pulls colors from the global or chart specific [colors](#colors)
                     * array.
                     * 
                     * @validvalue ["tween", "category"]
                     * @type {String}
                     * @sample {highmaps} maps/coloraxis/dataclasscolor/ Category colors
                     * @default tween
                     * @product highcharts highmaps
                     * @apioption colorAxis.dataClassColor
                     */

                    /**
                     * An array of data classes or ranges for the choropleth map. If none
                     * given, the color axis is scalar and values are distributed as a gradient
                     * between the minimum and maximum colors.
                     * 
                     * @type {Array<Object>}
                     * @sample {highmaps} maps/demo/data-class-ranges/ Multiple ranges
                     * @sample {highmaps} maps/demo/data-class-two-ranges/ Two ranges
                     * @product highcharts highmaps
                     * @apioption colorAxis.dataClasses
                     */

                    /**
                     * The color of each data class. If not set, the color is pulled from
                     * the global or chart-specific [colors](#colors) array. In 
                     * styled mode, this option is ignored. Instead, use colors defined in
                     * CSS.
                     * 
                     * @type {Color}
                     * @sample {highmaps} maps/demo/data-class-two-ranges/ Explicit colors
                     * @product highcharts highmaps
                     * @apioption colorAxis.dataClasses.color
                     */

                    /**
                     * The start of the value range that the data class represents, relating
                     * to the point value.
                     * 
                     * @type {Number}
                     * @product highcharts highmaps
                     * @apioption colorAxis.dataClasses.from
                     */

                    /**
                     * The name of the data class as it appears in the legend. If no name
                     * is given, it is automatically created based on the `from` and `to`
                     * values. For full programmatic control, [legend.labelFormatter](#legend.
                     * labelFormatter) can be used. In the formatter, `this.from` and `this.
                     * to` can be accessed.
                     * 
                     * @type {String}
                     * @sample {highmaps} maps/coloraxis/dataclasses-name/ Named data classes
                     * @sample {highmaps} maps/coloraxis/dataclasses-labelformatter/ Formatted data classes
                     * @product highcharts highmaps
                     * @apioption colorAxis.dataClasses.name
                     */

                    /**
                     * The end of the value range that the data class represents, relating
                     * to the point value.
                     * 
                     * @type {Number}
                     * @product highcharts highmaps
                     * @apioption colorAxis.dataClasses.to
                     */

                    /** @ignore */
                    lineWidth: 0,

                    /**
                     * Padding of the min value relative to the length of the axis. A
                     * padding of 0.05 will make a 100px axis 5px longer.
                     * 
                     * @type {Number}
                     * @product highcharts highmaps
                     */
                    minPadding: 0,

                    /**
                     * The maximum value of the axis in terms of map point values. If `null`,
                     * the max value is automatically calculated. If the `endOnTick` option
                     * is true, the max value might be rounded up.
                     * 
                     * @type {Number}
                     * @sample {highmaps} maps/coloraxis/gridlines/
                     *         Explicit min and max to reduce the effect of outliers
                     * @product highcharts highmaps
                     * @apioption colorAxis.max
                     */

                    /**
                     * The minimum value of the axis in terms of map point values. If `null`,
                     * the min value is automatically calculated. If the `startOnTick`
                     * option is true, the min value might be rounded down.
                     * 
                     * @type {Number}
                     * @sample {highmaps} maps/coloraxis/gridlines/
                     *         Explicit min and max to reduce the effect of outliers
                     * @product highcharts highmaps
                     * @apioption colorAxis.min
                     */

                    /**
                     * Padding of the max value relative to the length of the axis. A
                     * padding of 0.05 will make a 100px axis 5px longer.
                     * 
                     * @type {Number}
                     * @product highcharts highmaps
                     */
                    maxPadding: 0,

                    /**
                     * Color of the grid lines extending from the axis across the gradient.
                     * 
                     * @type {Color}
                     * @sample {highmaps} maps/coloraxis/gridlines/ Grid lines demonstrated
                     * @default #e6e6e6
                     * @product highcharts highmaps
                     * @apioption colorAxis.gridLineColor
                     */

                    /**
                     * The width of the grid lines extending from the axis across the
                     * gradient of a scalar color axis.
                     * 
                     * @type {Number}
                     * @sample {highmaps} maps/coloraxis/gridlines/ Grid lines demonstrated
                     * @default 1
                     * @product highcharts highmaps
                     */
                    gridLineWidth: 1,

                    /**
                     * The interval of the tick marks in axis units. When `null`, the tick
                     * interval is computed to approximately follow the `tickPixelInterval`.
                     * 
                     * @type {Number}
                     * @product highcharts highmaps
                     * @apioption colorAxis.tickInterval
                     */

                    /**
                     * If [tickInterval](#colorAxis.tickInterval) is `null` this option
                     * sets the approximate pixel interval of the tick marks.
                     * 
                     * @type {Number}
                     * @default 72
                     * @product highcharts highmaps
                     */
                    tickPixelInterval: 72,

                    /**
                     * Whether to force the axis to start on a tick. Use this option with
                     * the `maxPadding` option to control the axis start.
                     * 
                     * @type {Boolean}
                     * @default true
                     * @product highcharts highmaps
                     */
                    startOnTick: true,

                    /**
                     * Whether to force the axis to end on a tick. Use this option with
                     * the [maxPadding](#colorAxis.maxPadding) option to control the axis
                     * end.
                     * 
                     * @type {Boolean}
                     * @default true
                     * @product highcharts highmaps
                     */
                    endOnTick: true,

                    /**	@ignore */
                    offset: 0,

                    /**
                     * The triangular marker on a scalar color axis that points to the
                     * value of the hovered area. To disable the marker, set `marker:
                     * null`.
                     * 
                     * @type {Object}
                     * @sample {highmaps} maps/coloraxis/marker/ Black marker
                     * @product highcharts highmaps
                     */
                    marker: {

                        /**
                         * Animation for the marker as it moves between values. Set to `false`
                         * to disable animation. Defaults to `{ duration: 50 }`.
                         * 
                         * @type {Object|Boolean}
                         * @product highcharts highmaps
                         */
                        animation: {
                            duration: 50
                        },

                        /** @ignore */
                        width: 0.01,


                        /**
                         * The color of the marker.
                         * 
                         * @type {Color}
                         * @default #999999
                         * @product highcharts highmaps
                         */
                        color: '#999999'

                    },

                    /**
                     * The axis labels show the number for each tick.
                     * 
                     * For more live examples on label options, see [xAxis.labels in the
                     * Highcharts API.](/highcharts#xAxis.labels)
                     * 
                     * @type {Object}
                     * @extends xAxis.labels
                     * @product highcharts highmaps
                     */
                    labels: {

                        /**
                         * How to handle overflowing labels on horizontal color axis. Can be
                         * undefined or "justify". If "justify", labels will not render
                         * outside the legend area. If there is room to move it, it will be
                         * aligned to the edge, else it will be removed.
                         * 
                         * @validvalue [null, "justify"]
                         * @type {String}
                         * @default justify
                         * @product highcharts highmaps
                         */
                        overflow: 'justify',

                        rotation: 0
                    },

                    /**
                     * The color to represent the minimum of the color axis. Unless [dataClasses](#colorAxis.
                     * dataClasses) or [stops](#colorAxis.stops) are set, the gradient
                     * starts at this value.
                     * 
                     * If dataClasses are set, the color is based on minColor and maxColor
                     * unless a color is set for each data class, or the [dataClassColor](#colorAxis.
                     * dataClassColor) is set.
                     * 
                     * @type {Color}
                     * @sample {highmaps} maps/coloraxis/mincolor-maxcolor/ Min and max colors on scalar (gradient) axis
                     * @sample {highmaps} maps/coloraxis/mincolor-maxcolor-dataclasses/ On data classes
                     * @default #e6ebf5
                     * @product highcharts highmaps
                     */
                    minColor: '#e6ebf5',

                    /**
                     * The color to represent the maximum of the color axis. Unless [dataClasses](#colorAxis.
                     * dataClasses) or [stops](#colorAxis.stops) are set, the gradient
                     * ends at this value.
                     * 
                     * If dataClasses are set, the color is based on minColor and maxColor
                     * unless a color is set for each data class, or the [dataClassColor](#colorAxis.
                     * dataClassColor) is set.
                     * 
                     * @type {Color}
                     * @sample {highmaps} maps/coloraxis/mincolor-maxcolor/ Min and max colors on scalar (gradient) axis
                     * @sample {highmaps} maps/coloraxis/mincolor-maxcolor-dataclasses/ On data classes
                     * @default #003399
                     * @product highcharts highmaps
                     */
                    maxColor: '#003399',

                    /**
                     * Color stops for the gradient of a scalar color axis. Use this in
                     * cases where a linear gradient between a `minColor` and `maxColor`
                     * is not sufficient. The stops is an array of tuples, where the first
                     * item is a float between 0 and 1 assigning the relative position in
                     * the gradient, and the second item is the color.
                     * 
                     * @type {Array<Array>}
                     * @sample {highmaps} maps/demo/heatmap/ Heatmap with three color stops
                     * @product highcharts highmaps
                     * @apioption colorAxis.stops
                     */

                    /**
                     * The pixel length of the main tick marks on the color axis.
                     */
                    tickLength: 5,

                    /**
                     * The type of interpolation to use for the color axis. Can be `linear`
                     * or `logarithmic`.
                     * 
                     * @validvalue ["linear", "logarithmic"]
                     * @type {String}
                     * @default linear
                     * @product highcharts highmaps
                     * @apioption colorAxis.type
                     */

                    /**
                     * Whether to reverse the axis so that the highest number is closest
                     * to the origin. Defaults to `false` in a horizontal legend and `true`
                     * in a vertical legend, where the smallest value starts on top.
                     * 
                     * @type {Boolean}
                     * @product highcharts highmaps
                     * @apioption colorAxis.reversed
                     */

                    /**
                     * Whether to display the colorAxis in the legend.
                     * 
                     * @type {Boolean}
                     * @see [heatmap.showInLegend](#series.heatmap.showInLegend)
                     * @default true
                     * @since 4.2.7
                     * @product highcharts highmaps
                     */
                    showInLegend: true
                },

                // Properties to preserve after destroy, for Axis.update (#5881, #6025)
                keepProps: [
                    'legendGroup',
                    'legendItemHeight',
                    'legendItemWidth',
                    'legendItem',
                    'legendSymbol'
                ].concat(Axis.prototype.keepProps),

                /**
                 * Initialize the color axis
                 */
                init: function(chart, userOptions) {
                    var horiz = chart.options.legend.layout !== 'vertical',
                        options;

                    this.coll = 'colorAxis';

                    // Build the options
                    options = merge(this.defaultColorAxisOptions, {
                        side: horiz ? 2 : 1,
                        reversed: !horiz
                    }, userOptions, {
                        opposite: !horiz,
                        showEmpty: false,
                        title: null,
                        visible: chart.options.legend.enabled
                    });

                    Axis.prototype.init.call(this, chart, options);

                    // Base init() pushes it to the xAxis array, now pop it again
                    // chart[this.isXAxis ? 'xAxis' : 'yAxis'].pop();

                    // Prepare data classes
                    if (userOptions.dataClasses) {
                        this.initDataClasses(userOptions);
                    }
                    this.initStops();

                    // Override original axis properties
                    this.horiz = horiz;
                    this.zoomEnabled = false;

                    // Add default values		
                    this.defaultLegendLength = 200;
                },

                initDataClasses: function(userOptions) {
                    var chart = this.chart,
                        dataClasses,
                        colorCounter = 0,
                        colorCount = chart.options.chart.colorCount,
                        options = this.options,
                        len = userOptions.dataClasses.length;
                    this.dataClasses = dataClasses = [];
                    this.legendItems = [];

                    each(userOptions.dataClasses, function(dataClass, i) {
                        var colors;

                        dataClass = merge(dataClass);
                        dataClasses.push(dataClass);


                        if (dataClass.color) {
                            return;
                        }

                        if (options.dataClassColor === 'category') {

                            colors = chart.options.colors;
                            colorCount = colors.length;
                            dataClass.color = colors[colorCounter];

                            dataClass.colorIndex = colorCounter;

                            // increase and loop back to zero
                            colorCounter++;
                            if (colorCounter === colorCount) {
                                colorCounter = 0;
                            }
                        } else {
                            dataClass.color = color(options.minColor).tweenTo(
                                color(options.maxColor),
                                len < 2 ? 0.5 : i / (len - 1) // #3219
                            );
                        }
                    });
                },

                /**
                 * Override so that ticks are not added in data class axes (#6914)
                 */
                setTickPositions: function() {
                    if (!this.dataClasses) {
                        return Axis.prototype.setTickPositions.call(this);
                    }
                },


                initStops: function() {
                    this.stops = this.options.stops || [
                        [0, this.options.minColor],
                        [1, this.options.maxColor]
                    ];
                    each(this.stops, function(stop) {
                        stop.color = color(stop[1]);
                    });
                },

                /**
                 * Extend the setOptions method to process extreme colors and color
                 * stops.
                 */
                setOptions: function(userOptions) {
                    Axis.prototype.setOptions.call(this, userOptions);

                    this.options.crosshair = this.options.marker;
                },

                setAxisSize: function() {
                    var symbol = this.legendSymbol,
                        chart = this.chart,
                        legendOptions = chart.options.legend || {},
                        x,
                        y,
                        width,
                        height;

                    if (symbol) {
                        this.left = x = symbol.attr('x');
                        this.top = y = symbol.attr('y');
                        this.width = width = symbol.attr('width');
                        this.height = height = symbol.attr('height');
                        this.right = chart.chartWidth - x - width;
                        this.bottom = chart.chartHeight - y - height;

                        this.len = this.horiz ? width : height;
                        this.pos = this.horiz ? x : y;
                    } else {
                        // Fake length for disabled legend to avoid tick issues
                        // and such (#5205)
                        this.len = (
                            this.horiz ?
                            legendOptions.symbolWidth :
                            legendOptions.symbolHeight
                        ) || this.defaultLegendLength;
                    }
                },

                normalizedValue: function(value) {
                    if (this.isLog) {
                        value = this.val2lin(value);
                    }
                    return 1 - ((this.max - value) / ((this.max - this.min) || 1));
                },

                /**
                 * Translate from a value to a color
                 */
                toColor: function(value, point) {
                    var pos,
                        stops = this.stops,
                        from,
                        to,
                        color,
                        dataClasses = this.dataClasses,
                        dataClass,
                        i;

                    if (dataClasses) {
                        i = dataClasses.length;
                        while (i--) {
                            dataClass = dataClasses[i];
                            from = dataClass.from;
                            to = dataClass.to;
                            if (
                                (from === undefined || value >= from) &&
                                (to === undefined || value <= to)
                            ) {

                                color = dataClass.color;

                                if (point) {
                                    point.dataClass = i;
                                    point.colorIndex = dataClass.colorIndex;
                                }
                                break;
                            }
                        }

                    } else {

                        pos = this.normalizedValue(value);
                        i = stops.length;
                        while (i--) {
                            if (pos > stops[i][0]) {
                                break;
                            }
                        }
                        from = stops[i] || stops[i + 1];
                        to = stops[i + 1] || from;

                        // The position within the gradient
                        pos = 1 - (to[0] - pos) / ((to[0] - from[0]) || 1);

                        color = from.color.tweenTo(
                            to.color,
                            pos
                        );
                    }
                    return color;
                },

                /**
                 * Override the getOffset method to add the whole axis groups inside
                 * the legend.
                 */
                getOffset: function() {
                    var group = this.legendGroup,
                        sideOffset = this.chart.axisOffset[this.side];

                    if (group) {

                        // Hook for the getOffset method to add groups to this parent group
                        this.axisParent = group;

                        // Call the base
                        Axis.prototype.getOffset.call(this);

                        // First time only
                        if (!this.added) {

                            this.added = true;

                            this.labelLeft = 0;
                            this.labelRight = this.width;
                        }
                        // Reset it to avoid color axis reserving space
                        this.chart.axisOffset[this.side] = sideOffset;
                    }
                },

                /**
                 * Create the color gradient
                 */
                setLegendColor: function() {
                    var grad,
                        horiz = this.horiz,
                        reversed = this.reversed,
                        one = reversed ? 1 : 0,
                        zero = reversed ? 0 : 1;

                    grad = horiz ? [one, 0, zero, 0] : [0, zero, 0, one]; // #3190
                    this.legendColor = {
                        linearGradient: {
                            x1: grad[0],
                            y1: grad[1],
                            x2: grad[2],
                            y2: grad[3]
                        },
                        stops: this.stops
                    };
                },

                /**
                 * The color axis appears inside the legend and has its own legend symbol
                 */
                drawLegendSymbol: function(legend, item) {
                    var padding = legend.padding,
                        legendOptions = legend.options,
                        horiz = this.horiz,
                        width = pick(
                            legendOptions.symbolWidth,
                            horiz ? this.defaultLegendLength : 12
                        ),
                        height = pick(
                            legendOptions.symbolHeight,
                            horiz ? 12 : this.defaultLegendLength
                        ),
                        labelPadding = pick(legendOptions.labelPadding, horiz ? 16 : 30),
                        itemDistance = pick(legendOptions.itemDistance, 10);

                    this.setLegendColor();

                    // Create the gradient
                    item.legendSymbol = this.chart.renderer.rect(
                        0,
                        legend.baseline - 11,
                        width,
                        height
                    ).attr({
                        zIndex: 1
                    }).add(item.legendGroup);

                    // Set how much space this legend item takes up
                    this.legendItemWidth = width + padding +
                        (horiz ? itemDistance : labelPadding);
                    this.legendItemHeight = height + padding + (horiz ? labelPadding : 0);
                },
                /**
                 * Fool the legend
                 */
                setState: function(state) {
                    each(this.series, function(series) {
                        series.setState(state);
                    });
                },
                visible: true,
                setVisible: noop,
                getSeriesExtremes: function() {
                    var series = this.series,
                        i = series.length;
                    this.dataMin = Infinity;
                    this.dataMax = -Infinity;
                    while (i--) {
                        if (series[i].valueMin !== undefined) {
                            this.dataMin = Math.min(this.dataMin, series[i].valueMin);
                            this.dataMax = Math.max(this.dataMax, series[i].valueMax);
                        }
                    }
                },
                drawCrosshair: function(e, point) {
                    var plotX = point && point.plotX,
                        plotY = point && point.plotY,
                        crossPos,
                        axisPos = this.pos,
                        axisLen = this.len;

                    if (point) {
                        crossPos = this.toPixels(point[point.series.colorKey]);
                        if (crossPos < axisPos) {
                            crossPos = axisPos - 2;
                        } else if (crossPos > axisPos + axisLen) {
                            crossPos = axisPos + axisLen + 2;
                        }

                        point.plotX = crossPos;
                        point.plotY = this.len - crossPos;
                        Axis.prototype.drawCrosshair.call(this, e, point);
                        point.plotX = plotX;
                        point.plotY = plotY;

                        if (
                            this.cross &&
                            !this.cross.addedToColorAxis &&
                            this.legendGroup
                        ) {
                            this.cross
                                .addClass('highcharts-coloraxis-marker')
                                .add(this.legendGroup);

                            this.cross.addedToColorAxis = true;


                            this.cross.attr({
                                fill: this.crosshair.color
                            });


                        }
                    }
                },
                getPlotLinePath: function(a, b, c, d, pos) {
                    // crosshairs only
                    return isNumber(pos) ? // pos can be 0 (#3969)
                        (
                            this.horiz ? [
                                'M',
                                pos - 4, this.top - 6,
                                'L',
                                pos + 4, this.top - 6,
                                pos, this.top,
                                'Z'
                            ] : [
                                'M',
                                this.left, pos,
                                'L',
                                this.left - 6, pos + 6,
                                this.left - 6, pos - 6,
                                'Z'
                            ]
                        ) :
                        Axis.prototype.getPlotLinePath.call(this, a, b, c, d);
                },

                update: function(newOptions, redraw) {
                    var chart = this.chart,
                        legend = chart.legend;

                    each(this.series, function(series) {
                        // Needed for Axis.update when choropleth colors change
                        series.isDirtyData = true;
                    });

                    // When updating data classes, destroy old items and make sure new ones
                    // are created (#3207)
                    if (newOptions.dataClasses && legend.allItems) {
                        each(legend.allItems, function(item) {
                            if (item.isDataClass && item.legendGroup) {
                                item.legendGroup.destroy();
                            }
                        });
                        chart.isDirtyLegend = true;
                    }

                    // Keep the options structure updated for export. Unlike xAxis and
                    // yAxis, the colorAxis is not an array. (#3207)
                    chart.options[this.coll] = merge(this.userOptions, newOptions);

                    Axis.prototype.update.call(this, newOptions, redraw);
                    if (this.legendItem) {
                        this.setLegendColor();
                        legend.colorizeItem(this, true);
                    }
                },

                /**
                 * Extend basic axis remove by also removing the legend item.
                 */
                remove: function() {
                    if (this.legendItem) {
                        this.chart.legend.destroyItem(this);
                    }
                    Axis.prototype.remove.call(this);
                },

                /**
                 * Get the legend item symbols for data classes
                 */
                getDataClassLegendSymbols: function() {
                    var axis = this,
                        chart = this.chart,
                        legendItems = this.legendItems,
                        legendOptions = chart.options.legend,
                        valueDecimals = legendOptions.valueDecimals,
                        valueSuffix = legendOptions.valueSuffix || '',
                        name;

                    if (!legendItems.length) {
                        each(this.dataClasses, function(dataClass, i) {
                            var vis = true,
                                from = dataClass.from,
                                to = dataClass.to;

                            // Assemble the default name. This can be overridden
                            // by legend.options.labelFormatter
                            name = '';
                            if (from === undefined) {
                                name = '< ';
                            } else if (to === undefined) {
                                name = '> ';
                            }
                            if (from !== undefined) {
                                name += H.numberFormat(from, valueDecimals) + valueSuffix;
                            }
                            if (from !== undefined && to !== undefined) {
                                name += ' - ';
                            }
                            if (to !== undefined) {
                                name += H.numberFormat(to, valueDecimals) + valueSuffix;
                            }
                            // Add a mock object to the legend items
                            legendItems.push(extend({
                                chart: chart,
                                name: name,
                                options: {},
                                drawLegendSymbol: LegendSymbolMixin.drawRectangle,
                                visible: true,
                                setState: noop,
                                isDataClass: true,
                                setVisible: function() {
                                    vis = this.visible = !vis;
                                    each(axis.series, function(series) {
                                        each(series.points, function(point) {
                                            if (point.dataClass === i) {
                                                point.setVisible(vis);
                                            }
                                        });
                                    });

                                    chart.legend.colorizeItem(this, vis);
                                }
                            }, dataClass));
                        });
                    }
                    return legendItems;
                },
                name: '' // Prevents 'undefined' in legend in IE8
            });

            /**
             * Handle animation of the color attributes directly
             */
            each(['fill', 'stroke'], function(prop) {
                H.Fx.prototype[prop + 'Setter'] = function() {
                    this.elem.attr(
                        prop,
                        color(this.start).tweenTo(
                            color(this.end),
                            this.pos
                        ),
                        null,
                        true
                    );
                };
            });

            /**
             * Extend the chart getAxes method to also get the color axis
             */
            wrap(Chart.prototype, 'getAxes', function(proceed) {

                var options = this.options,
                    colorAxisOptions = options.colorAxis;

                proceed.call(this);

                this.colorAxis = [];
                if (colorAxisOptions) {
                    new ColorAxis(this, colorAxisOptions); // eslint-disable-line no-new
                }
            });


            /**
             * Wrap the legend getAllItems method to add the color axis. This also removes
             * the axis' own series to prevent them from showing up individually.
             */
            wrap(Legend.prototype, 'getAllItems', function(proceed) {
                var allItems = [],
                    colorAxis = this.chart.colorAxis[0];

                if (colorAxis && colorAxis.options) {
                    if (colorAxis.options.showInLegend) {
                        // Data classes
                        if (colorAxis.options.dataClasses) {
                            allItems = allItems.concat(
                                colorAxis.getDataClassLegendSymbols()
                            );
                            // Gradient legend
                        } else {
                            // Add this axis on top
                            allItems.push(colorAxis);
                        }
                    }

                    // Don't add the color axis' series
                    each(colorAxis.series, function(series) {
                        series.options.showInLegend = false;
                    });
                }

                return allItems.concat(proceed.call(this));
            });

            wrap(Legend.prototype, 'colorizeItem', function(proceed, item, visible) {
                proceed.call(this, item, visible);
                if (visible && item.legendColor) {
                    item.legendSymbol.attr({
                        fill: item.legendColor
                    });
                }
            });

            // Updates in the legend need to be reflected in the color axis (6888)
            wrap(Legend.prototype, 'update', function(proceed) {
                proceed.apply(this, [].slice.call(arguments, 1));

                if (this.chart.colorAxis[0]) {
                    this.chart.colorAxis[0].update({}, arguments[2]);
                }
            });
        }

    }(Highcharts));
    (function(H) {
        /**
         * (c) 2010-2017 Torstein Honsi
         *
         * License: www.highcharts.com/license
         */
        var defined = H.defined,
            each = H.each,
            noop = H.noop,
            seriesTypes = H.seriesTypes;

        /**
         * Mixin for maps and heatmaps
         */
        H.colorPointMixin = {
            /**
             * Color points have a value option that determines whether or not it is
             * a null point
             */
            isValid: function() {
                // undefined is allowed
                return (
                    this.value !== null &&
                    this.value !== Infinity &&
                    this.value !== -Infinity
                );
            },

            /**
             * Set the visibility of a single point
             */
            setVisible: function(vis) {
                var point = this,
                    method = vis ? 'show' : 'hide';

                // Show and hide associated elements
                each(['graphic', 'dataLabel'], function(key) {
                    if (point[key]) {
                        point[key][method]();
                    }
                });
            },
            setState: function(state) {
                H.Point.prototype.setState.call(this, state);
                if (this.graphic) {
                    this.graphic.attr({
                        zIndex: state === 'hover' ? 1 : 0
                    });
                }
            }
        };

        H.colorSeriesMixin = {
            pointArrayMap: ['value'],
            axisTypes: ['xAxis', 'yAxis', 'colorAxis'],
            optionalAxis: 'colorAxis',
            trackerGroups: ['group', 'markerGroup', 'dataLabelsGroup'],
            getSymbol: noop,
            parallelArrays: ['x', 'y', 'value'],
            colorKey: 'value',


            pointAttribs: seriesTypes.column.prototype.pointAttribs,


            /**
             * In choropleth maps, the color is a result of the value, so this needs
             * translation too
             */
            translateColors: function() {
                var series = this,
                    nullColor = this.options.nullColor,
                    colorAxis = this.colorAxis,
                    colorKey = this.colorKey;

                each(this.data, function(point) {
                    var value = point[colorKey],
                        color;

                    color = point.options.color ||
                        (
                            point.isNull ?
                            nullColor :
                            (colorAxis && value !== undefined) ?
                            colorAxis.toColor(value, point) :
                            point.color || series.color
                        );

                    if (color) {
                        point.color = color;
                    }
                });
            },

            /**
             * Get the color attibutes to apply on the graphic
             */
            colorAttribs: function(point) {
                var ret = {};
                if (defined(point.color)) {
                    ret[this.colorProp || 'fill'] = point.color;
                }
                return ret;
            }
        };

    }(Highcharts));
    (function(H) {
        /**
         * (c) 2010-2017 Torstein Honsi
         *
         * License: www.highcharts.com/license
         */
        var colorPointMixin = H.colorPointMixin,
            colorSeriesMixin = H.colorSeriesMixin,
            each = H.each,
            LegendSymbolMixin = H.LegendSymbolMixin,
            merge = H.merge,
            noop = H.noop,
            pick = H.pick,
            Series = H.Series,
            seriesType = H.seriesType,
            seriesTypes = H.seriesTypes;


        /**
         * A heatmap is a graphical representation of data where the individual values
         * contained in a matrix are represented as colors.
         *
         * @sample highcharts/demo/heatmap/
         *         Simple heatmap
         * @sample highcharts/demo/heatmap-canvas/
         *         Heavy heatmap
         * @extends {plotOptions.scatter}
         * @excluding marker,pointRange
         * @product highcharts highmaps
         * @optionparent plotOptions.heatmap
         */
        seriesType('heatmap', 'scatter', {

            /**
             * Animation is disabled by default on the heatmap series.
             */
            animation: false,

            /**
             * The border width for each heat map item.
             */
            borderWidth: 0,

            /**
             * Padding between the points in the heatmap.
             * 
             * @type {Number}
             * @default 0
             * @since 6.0
             * @apioption plotOptions.heatmap.pointPadding
             */

            /**
             * The main color of the series. In heat maps this color is rarely used,
             * as we mostly use the color to denote the value of each point. Unless
             * options are set in the [colorAxis](#colorAxis), the default value
             * is pulled from the [options.colors](#colors) array.
             * 
             * @type {Color}
             * @default null
             * @since 4.0
             * @product highcharts
             * @apioption plotOptions.heatmap.color
             */

            /**
             * The column size - how many X axis units each column in the heatmap
             * should span.
             * 
             * @type {Number}
             * @sample {highcharts} maps/demo/heatmap/ One day
             * @sample {highmaps} maps/demo/heatmap/ One day
             * @default 1
             * @since 4.0
             * @product highcharts highmaps
             * @apioption plotOptions.heatmap.colsize
             */



            /**
             * The color applied to null points. In styled mode, a general CSS class is
             * applied instead.
             *
             * @type {Color}
             */
            nullColor: '#f7f7f7',


            dataLabels: {

                formatter: function() { // #2945
                    return this.point.value;
                },
                inside: true,
                verticalAlign: 'middle',
                crop: false,
                overflow: false,
                padding: 0 // #3837
            },

            /** @ignore */
            marker: null,

            /**	@ignore */
            pointRange: null, // dynamically set to colsize by default

            tooltip: {
                pointFormat: '{point.x}, {point.y}: {point.value}<br/>'
            },

            states: {

                normal: {
                    animation: true
                },

                hover: {
                    halo: false, // #3406, halo is disabled on heatmaps by default
                    brightness: 0.2
                }
            }
            /**
             * The row size - how many Y axis units each heatmap row should span.
             * 
             * @type {Number}
             * @sample {highcharts} maps/demo/heatmap/ 1 by default
             * @sample {highmaps} maps/demo/heatmap/ 1 by default
             * @default 1
             * @since 4.0
             * @product highcharts highmaps
             * @apioption plotOptions.heatmap.rowsize
             */

        }, merge(colorSeriesMixin, {
            pointArrayMap: ['y', 'value'],
            hasPointSpecificOptions: true,
            getExtremesFromAll: true,
            directTouch: true,

            /**
             * Override the init method to add point ranges on both axes.
             */
            init: function() {
                var options;
                seriesTypes.scatter.prototype.init.apply(this, arguments);

                options = this.options;
                // #3758, prevent resetting in setData
                options.pointRange = pick(options.pointRange, options.colsize || 1);
                this.yAxis.axisPointRange = options.rowsize || 1; // general point range
            },
            translate: function() {
                var series = this,
                    options = series.options,
                    xAxis = series.xAxis,
                    yAxis = series.yAxis,
                    seriesPointPadding = options.pointPadding || 0,
                    between = function(x, a, b) {
                        return Math.min(Math.max(a, x), b);
                    };

                series.generatePoints();

                each(series.points, function(point) {
                    var xPad = (options.colsize || 1) / 2,
                        yPad = (options.rowsize || 1) / 2,
                        x1 = between(
                            Math.round(
                                xAxis.len -
                                xAxis.translate(point.x - xPad, 0, 1, 0, 1)
                            ), -xAxis.len, 2 * xAxis.len
                        ),
                        x2 = between(
                            Math.round(
                                xAxis.len -
                                xAxis.translate(point.x + xPad, 0, 1, 0, 1)
                            ), -xAxis.len, 2 * xAxis.len
                        ),
                        y1 = between(
                            Math.round(yAxis.translate(point.y - yPad, 0, 1, 0, 1)), -yAxis.len, 2 * yAxis.len
                        ),
                        y2 = between(
                            Math.round(yAxis.translate(point.y + yPad, 0, 1, 0, 1)), -yAxis.len, 2 * yAxis.len
                        ),
                        pointPadding = pick(point.pointPadding, seriesPointPadding);

                    // Set plotX and plotY for use in K-D-Tree and more
                    point.plotX = point.clientX = (x1 + x2) / 2;
                    point.plotY = (y1 + y2) / 2;

                    point.shapeType = 'rect';
                    point.shapeArgs = {
                        x: Math.min(x1, x2) + pointPadding,
                        y: Math.min(y1, y2) + pointPadding,
                        width: Math.abs(x2 - x1) - pointPadding * 2,
                        height: Math.abs(y2 - y1) - pointPadding * 2
                    };
                });

                series.translateColors();
            },
            drawPoints: function() {
                seriesTypes.column.prototype.drawPoints.call(this);

                each(this.points, function(point) {

                    point.graphic.attr(this.colorAttribs(point));

                }, this);
            },
            animate: noop,
            getBox: noop,
            drawLegendSymbol: LegendSymbolMixin.drawRectangle,
            alignDataLabel: seriesTypes.column.prototype.alignDataLabel,
            getExtremes: function() {
                // Get the extremes from the value data
                Series.prototype.getExtremes.call(this, this.valueData);
                this.valueMin = this.dataMin;
                this.valueMax = this.dataMax;

                // Get the extremes from the y data
                Series.prototype.getExtremes.call(this);
            }

        }), H.extend({
            haloPath: function(size) {
                if (!size) {
                    return [];
                }
                var rect = this.shapeArgs;
                return [
                    'M', rect.x - size, rect.y - size,
                    'L', rect.x - size, rect.y + rect.height + size,
                    rect.x + rect.width + size, rect.y + rect.height + size,
                    rect.x + rect.width + size, rect.y - size,
                    'Z'
                ];
            }
        }, colorPointMixin));
        /**
         * A `heatmap` series. If the [type](#series.heatmap.type) option is
         * not specified, it is inherited from [chart.type](#chart.type).
         * 
         * For options that apply to multiple series, it is recommended to add
         * them to the [plotOptions.series](#plotOptions.series) options structure.
         * To apply to all series of this specific type, apply it to [plotOptions.
         * heatmap](#plotOptions.heatmap).
         * 
         * @type {Object}
         * @extends series,plotOptions.heatmap
         * @excluding dataParser,dataURL,stack
         * @product highcharts highmaps
         * @apioption series.heatmap
         */

        /**
         * An array of data points for the series. For the `heatmap` series
         * type, points can be given in the following ways:
         * 
         * 1.  An array of arrays with 3 or 2 values. In this case, the values
         * correspond to `x,y,value`. If the first value is a string, it is
         * applied as the name of the point, and the `x` value is inferred.
         * The `x` value can also be omitted, in which case the inner arrays
         * should be of length 2\. Then the `x` value is automatically calculated,
         * either starting at 0 and incremented by 1, or from `pointStart`
         * and `pointInterval` given in the series options.
         * 
         *  ```js
         *     data: [
         *         [0, 9, 7],
         *         [1, 10, 4],
         *         [2, 6, 3]
         *     ]
         *  ```
         * 
         * 2.  An array of objects with named values. The objects are point
         * configuration objects as seen below. If the total number of data
         * points exceeds the series' [turboThreshold](#series.heatmap.turboThreshold),
         * this option is not available.
         * 
         *  ```js
         *     data: [{
         *         x: 1,
         *         y: 3,
         *         value: 10,
         *         name: "Point2",
         *         color: "#00FF00"
         *     }, {
         *         x: 1,
         *         y: 7,
         *         value: 10,
         *         name: "Point1",
         *         color: "#FF00FF"
         *     }]
         *  ```
         * 
         * @type {Array<Object|Array>}
         * @extends series.line.data
         * @excluding marker
         * @sample {highcharts} highcharts/chart/reflow-true/ Numerical values
         * @sample {highcharts} highcharts/series/data-array-of-arrays/ Arrays of numeric x and y
         * @sample {highcharts} highcharts/series/data-array-of-arrays-datetime/ Arrays of datetime x and y
         * @sample {highcharts} highcharts/series/data-array-of-name-value/ Arrays of point.name and y
         * @sample {highcharts} highcharts/series/data-array-of-objects/ Config objects
         * @product highcharts highmaps
         * @apioption series.heatmap.data
         */

        /**
         * The color of the point. In heat maps the point color is rarely set
         * explicitly, as we use the color to denote the `value`. Options for
         * this are set in the [colorAxis](#colorAxis) configuration.
         * 
         * @type {Color}
         * @product highcharts highmaps
         * @apioption series.heatmap.data.color
         */

        /**
         * The value of the point, resulting in a color controled by options
         * as set in the [colorAxis](#colorAxis) configuration.
         * 
         * @type {Number}
         * @product highcharts highmaps
         * @apioption series.heatmap.data.value
         */

        /**
         * The x value of the point. For datetime axes,
         * the X value is the timestamp in milliseconds since 1970.
         * 
         * @type {Number}
         * @product highcharts highmaps
         * @apioption series.heatmap.data.x
         */

        /**
         * The y value of the point.
         * 
         * @type {Number}
         * @product highcharts highmaps
         * @apioption series.heatmap.data.y
         */

        /**
         * Point padding for a single point.
         *
         * @type {Number}
         * @sample maps/plotoptions/tilemap-pointpadding Point padding on tiles
         * @apioption series.heatmap.data.pointPadding
         */


    }(Highcharts));
}));
