/**
 * @license Highcharts Gantt JS v9.1.1 (2021-06-03)
 *
 * GridAxis
 *
 * (c) 2016-2021 Lars A. V. Cabrera
 *
 * 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('highcharts/modules/grid-axis', ['highcharts'], function (Highcharts) {
            factory(Highcharts);
            factory.Highcharts = Highcharts;
            return factory;
        });
    } else {
        factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
    }
}(function (Highcharts) {
    var _modules = Highcharts ? Highcharts._modules : {};
    function _registerModule(obj, path, args, fn) {
        if (!obj.hasOwnProperty(path)) {
            obj[path] = fn.apply(null, args);
        }
    }
    _registerModule(_modules, 'Core/Axis/GridAxis.js', [_modules['Core/Axis/Axis.js'], _modules['Core/Axis/AxisDefaults.js'], _modules['Core/Globals.js'], _modules['Core/Utilities.js']], function (Axis, AxisDefaults, H, U) {
        /* *
         *
         *  (c) 2016 Highsoft AS
         *  Authors: Lars A. V. Cabrera
         *
         *  License: www.highcharts.com/license
         *
         *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
         *
         * */
        var dateFormats = H.dateFormats;
        var addEvent = U.addEvent,
            defined = U.defined,
            erase = U.erase,
            find = U.find,
            isArray = U.isArray,
            isNumber = U.isNumber,
            merge = U.merge,
            pick = U.pick,
            timeUnits = U.timeUnits,
            wrap = U.wrap;
        /* *
         *
         *  Functions
         *
         * */
        /* eslint-disable require-jsdoc */
        function argsToArray(args) {
            return Array.prototype.slice.call(args, 1);
        }
        function isObject(x) {
            // Always use strict mode
            return U.isObject(x, true);
        }
        function applyGridOptions(axis) {
            var options = axis.options;
            // Center-align by default
            /*
            if (!options.labels) {
                options.labels = {};
            }
            */
            options.labels.align = pick(options.labels.align, 'center');
            // @todo: Check against tickLabelPlacement between/on etc
            /* Prevents adding the last tick label if the axis is not a category
               axis.
               Since numeric labels are normally placed at starts and ends of a
               range of value, and this module makes the label point at the value,
               an "extra" label would appear. */
            if (!axis.categories) {
                options.showLastLabel = false;
            }
            // Prevents rotation of labels when squished, as rotating them would not
            // help.
            axis.labelRotation = 0;
            options.labels.rotation = 0;
        }
        /**
         * Axis with grid support.
         * @private
         */
        var GridAxis;
        (function (GridAxis) {
            /* *
             *
             *  Declarations
             *
             * */
            /**
             * Enum for which side the axis is on. Maps to axis.side.
             * @private
             */
            var Side;
            (function (Side) {
                Side[Side["top"] = 0] = "top";
                Side[Side["right"] = 1] = "right";
                Side[Side["bottom"] = 2] = "bottom";
                Side[Side["left"] = 3] = "left";
            })(Side = GridAxis.Side || (GridAxis.Side = {}));
            /* *
             *
             *  Functions
             *
             * */
            /* eslint-disable valid-jsdoc */
            /**
             * Extends axis class with grid support.
             * @private
             */
            function compose(AxisClass, ChartClass, TickClass) {
                if (AxisClass.keepProps.indexOf('grid') === -1) {
                    AxisClass.keepProps.push('grid');
                    AxisClass.prototype.getMaxLabelDimensions = getMaxLabelDimensions;
                    wrap(AxisClass.prototype, 'unsquish', wrapUnsquish);
                    // Add event handlers
                    addEvent(AxisClass, 'init', onInit);
                    addEvent(AxisClass, 'afterGetOffset', onAfterGetOffset);
                    addEvent(AxisClass, 'afterGetTitlePosition', onAfterGetTitlePosition);
                    addEvent(AxisClass, 'afterInit', onAfterInit);
                    addEvent(AxisClass, 'afterRender', onAfterRender);
                    addEvent(AxisClass, 'afterSetAxisTranslation', onAfterSetAxisTranslation);
                    addEvent(AxisClass, 'afterSetOptions', onAfterSetOptions);
                    addEvent(AxisClass, 'afterSetOptions', onAfterSetOptions2);
                    addEvent(AxisClass, 'afterSetScale', onAfterSetScale);
                    addEvent(AxisClass, 'afterTickSize', onAfterTickSize);
                    addEvent(AxisClass, 'trimTicks', onTrimTicks);
                    addEvent(AxisClass, 'destroy', onDestroy);
                }
                addEvent(ChartClass, 'afterSetChartSize', onChartAfterSetChartSize);
                addEvent(TickClass, 'afterGetLabelPosition', onTickAfterGetLabelPosition);
                addEvent(TickClass, 'labelFormat', onTickLabelFormat);
                return AxisClass;
            }
            GridAxis.compose = compose;
            /**
             * Get the largest label width and height.
             *
             * @private
             * @function Highcharts.Axis#getMaxLabelDimensions
             *
             * @param {Highcharts.Dictionary<Highcharts.Tick>} ticks
             * All the ticks on one axis.
             *
             * @param {Array<number|string>} tickPositions
             * All the tick positions on one axis.
             *
             * @return {Highcharts.SizeObject}
             * Object containing the properties height and width.
             *
             * @todo Move this to the generic axis implementation, as it is used there.
             */
            function getMaxLabelDimensions(ticks, tickPositions) {
                var dimensions = {
                        width: 0,
                        height: 0
                    };
                tickPositions.forEach(function (pos) {
                    var tick = ticks[pos];
                    var labelHeight = 0,
                        labelWidth = 0,
                        label;
                    if (isObject(tick)) {
                        label = isObject(tick.label) ? tick.label : {};
                        // Find width and height of label
                        labelHeight = label.getBBox ? label.getBBox().height : 0;
                        if (label.textStr && !isNumber(label.textPxLength)) {
                            label.textPxLength = label.getBBox().width;
                        }
                        labelWidth = isNumber(label.textPxLength) ?
                            // Math.round ensures crisp lines
                            Math.round(label.textPxLength) :
                            0;
                        if (label.textStr) {
                            // Set the tickWidth same as the label width after ellipsis
                            // applied #10281
                            labelWidth = Math.round(label.getBBox().width);
                        }
                        // Update the result if width and/or height are larger
                        dimensions.height = Math.max(labelHeight, dimensions.height);
                        dimensions.width = Math.max(labelWidth, dimensions.width);
                    }
                });
                // For tree grid, add indentation
                if (this.options.type === 'treegrid' &&
                    this.treeGrid &&
                    this.treeGrid.mapOfPosToGridNode) {
                    var treeDepth = this.treeGrid.mapOfPosToGridNode[-1].height || 0;
                    dimensions.width += this.options.labels.indentation * (treeDepth - 1);
                }
                return dimensions;
            }
            /**
             * Handle columns and getOffset.
             * @private
             */
            function onAfterGetOffset() {
                var grid = this.grid;
                (grid && grid.columns || []).forEach(function (column) {
                    column.getOffset();
                });
            }
            /**
             * @private
             */
            function onAfterGetTitlePosition(e) {
                var axis = this;
                var options = axis.options;
                var gridOptions = options.grid || {};
                if (gridOptions.enabled === true) {
                    // compute anchor points for each of the title align options
                    var axisTitle = axis.axisTitle,
                        axisHeight = axis.height,
                        horiz = axis.horiz,
                        axisLeft = axis.left,
                        offset = axis.offset,
                        opposite = axis.opposite,
                        options_1 = axis.options,
                        axisTop = axis.top,
                        axisWidth = axis.width;
                    var tickSize = axis.tickSize();
                    var titleWidth = axisTitle && axisTitle.getBBox().width;
                    var xOption = options_1.title.x;
                    var yOption = options_1.title.y;
                    var titleMargin = pick(options_1.title.margin,
                        horiz ? 5 : 10);
                    var titleFontSize = axis.chart.renderer.fontMetrics(options_1.title.style.fontSize,
                        axisTitle).f;
                    var crispCorr = tickSize ? tickSize[0] / 2 : 0;
                    // TODO account for alignment
                    // the position in the perpendicular direction of the axis
                    var offAxis = ((horiz ? axisTop + axisHeight : axisLeft) +
                            (horiz ? 1 : -1) * // horizontal axis reverses the margin
                                (opposite ? -1 : 1) * // so does opposite axes
                                crispCorr +
                            (axis.side === GridAxis.Side.bottom ? titleFontSize : 0));
                    e.titlePosition.x = horiz ?
                        axisLeft - (titleWidth || 0) / 2 - titleMargin + xOption :
                        offAxis + (opposite ? axisWidth : 0) + offset + xOption;
                    e.titlePosition.y = horiz ?
                        (offAxis -
                            (opposite ? axisHeight : 0) +
                            (opposite ? titleFontSize : -titleFontSize) / 2 +
                            offset +
                            yOption) :
                        axisTop - titleMargin + yOption;
                }
            }
            /**
             * @private
             */
            function onAfterInit() {
                var axis = this;
                var chart = axis.chart,
                    _a = axis.options.grid,
                    gridOptions = _a === void 0 ? {} : _a,
                    userOptions = axis.userOptions;
                if (gridOptions.enabled) {
                    applyGridOptions(axis);
                }
                if (gridOptions.columns) {
                    var columns = axis.grid.columns = [];
                    var columnIndex = axis.grid.columnIndex = 0;
                    // Handle columns, each column is a grid axis
                    while (++columnIndex < gridOptions.columns.length) {
                        var columnOptions = merge(userOptions,
                            gridOptions.columns[gridOptions.columns.length - columnIndex - 1], {
                                linkedTo: 0,
                                // Force to behave like category axis
                                type: 'category',
                                // Disable by default the scrollbar on the grid axis
                                scrollbar: {
                                    enabled: false
                                }
                            });
                        delete columnOptions.grid.columns; // Prevent recursion
                        var column = new Axis(axis.chart,
                            columnOptions);
                        column.grid.isColumn = true;
                        column.grid.columnIndex = columnIndex;
                        // Remove column axis from chart axes array, and place it
                        // in the columns array.
                        erase(chart.axes, column);
                        erase(chart[axis.coll], column);
                        columns.push(column);
                    }
                }
            }
            /**
             * Draw an extra line on the far side of the outermost axis,
             * creating floor/roof/wall of a grid. And some padding.
             * ```
             * Make this:
             *             (axis.min) __________________________ (axis.max)
             *                           |    |    |    |    |
             * Into this:
             *             (axis.min) __________________________ (axis.max)
             *                        ___|____|____|____|____|__
             * ```
             * @private
             */
            function onAfterRender() {
                var axis = this,
                    grid = axis.grid,
                    options = axis.options,
                    gridOptions = options.grid || {};
                if (gridOptions.enabled === true) {
                    var min = axis.min || 0,
                        max = axis.max || 0;
                    // @todo acutual label padding (top, bottom, left, right)
                    axis.maxLabelDimensions = axis.getMaxLabelDimensions(axis.ticks, axis.tickPositions);
                    // Remove right wall before rendering if updating
                    if (axis.rightWall) {
                        axis.rightWall.destroy();
                    }
                    /*
                    Draw an extra axis line on outer axes
                                >
                    Make this:    |______|______|______|___

                                > _________________________
                    Into this:    |______|______|______|__|
                                                            */
                    if (axis.grid && axis.grid.isOuterAxis() && axis.axisLine) {
                        var lineWidth = options.lineWidth;
                        if (lineWidth) {
                            var linePath = axis.getLinePath(lineWidth),
                                startPoint = linePath[0],
                                endPoint = linePath[1], 
                                // Negate distance if top or left axis
                                // Subtract 1px to draw the line at the end of the tick
                                tickLength = (axis.tickSize('tick') || [1])[0],
                                distance = (tickLength - 1) * ((axis.side === GridAxis.Side.top ||
                                    axis.side === GridAxis.Side.left) ? -1 : 1);
                            // If axis is horizontal, reposition line path vertically
                            if (startPoint[0] === 'M' && endPoint[0] === 'L') {
                                if (axis.horiz) {
                                    startPoint[2] += distance;
                                    endPoint[2] += distance;
                                }
                                else {
                                    startPoint[1] += distance;
                                    endPoint[1] += distance;
                                }
                            }
                            // If it doesn't exist, add an upper and lower border
                            // for the vertical grid axis.
                            if (!axis.horiz && axis.chart.marginRight) {
                                var upperBorderStartPoint = startPoint,
                                    upperBorderEndPoint = [
                                        'L',
                                        axis.left,
                                        startPoint[2] || 0
                                    ],
                                    upperBorderPath = [upperBorderStartPoint,
                                    upperBorderEndPoint],
                                    lowerBorderEndPoint = [
                                        'L',
                                        axis.chart.chartWidth - axis.chart.marginRight,
                                        axis.toPixels(max + axis.tickmarkOffset)
                                    ],
                                    lowerBorderStartPoint = [
                                        'M',
                                        endPoint[1] || 0,
                                        axis.toPixels(max + axis.tickmarkOffset)
                                    ],
                                    lowerBorderPath = [lowerBorderStartPoint,
                                    lowerBorderEndPoint];
                                if (!axis.grid.upperBorder && min % 1 !== 0) {
                                    axis.grid.upperBorder = axis.grid.renderBorder(upperBorderPath);
                                }
                                if (axis.grid.upperBorder) {
                                    axis.grid.upperBorder.attr({
                                        stroke: options.lineColor,
                                        'stroke-width': options.lineWidth
                                    });
                                    axis.grid.upperBorder.animate({
                                        d: upperBorderPath
                                    });
                                }
                                if (!axis.grid.lowerBorder && max % 1 !== 0) {
                                    axis.grid.lowerBorder = axis.grid.renderBorder(lowerBorderPath);
                                }
                                if (axis.grid.lowerBorder) {
                                    axis.grid.lowerBorder.attr({
                                        stroke: options.lineColor,
                                        'stroke-width': options.lineWidth
                                    });
                                    axis.grid.lowerBorder.animate({
                                        d: lowerBorderPath
                                    });
                                }
                            }
                            // Render an extra line parallel to the existing axes,
                            // to close the grid.
                            if (!axis.grid.axisLineExtra) {
                                axis.grid.axisLineExtra = axis.grid.renderBorder(linePath);
                            }
                            else {
                                axis.grid.axisLineExtra.attr({
                                    stroke: options.lineColor,
                                    'stroke-width': options.lineWidth
                                });
                                axis.grid.axisLineExtra.animate({
                                    d: linePath
                                });
                            }
                            // show or hide the line depending on
                            // options.showEmpty
                            axis.axisLine[axis.showAxis ? 'show' : 'hide'](true);
                        }
                    }
                    (grid && grid.columns || []).forEach(function (column) {
                        column.render();
                    });
                    // Manipulate the tick mark visibility
                    // based on the axis.max- allows smooth scrolling.
                    if (!axis.horiz &&
                        axis.chart.hasRendered &&
                        (axis.scrollbar ||
                            (axis.linkedParent && axis.linkedParent.scrollbar))) {
                        var tickmarkOffset = axis.tickmarkOffset,
                            lastTick = axis.tickPositions[axis.tickPositions.length - 1],
                            firstTick = axis.tickPositions[0];
                        // Hide/show firts tick label.
                        var label = axis.ticks[firstTick].label;
                        if (label) {
                            if (min - firstTick > tickmarkOffset) {
                                label.hide();
                            }
                            else {
                                label.show();
                            }
                        }
                        // Hide/show last tick mark/label.
                        label = axis.ticks[lastTick].label;
                        if (label) {
                            if (lastTick - max > tickmarkOffset) {
                                label.hide();
                            }
                            else {
                                label.show();
                            }
                        }
                        var mark = axis.ticks[lastTick].mark;
                        if (mark) {
                            if (lastTick - max < tickmarkOffset && lastTick - max > 0 && axis.ticks[lastTick].isLast) {
                                mark.hide();
                            }
                            else if (axis.ticks[lastTick - 1]) {
                                mark.show();
                            }
                        }
                    }
                }
            }
            /**
             * @private
             */
            function onAfterSetAxisTranslation() {
                var axis = this;
                var tickInfo = axis.tickPositions && axis.tickPositions.info;
                var options = axis.options;
                var gridOptions = options.grid || {};
                var userLabels = axis.userOptions.labels || {};
                // Fire this only for the Gantt type chart, #14868.
                if (gridOptions.enabled) {
                    if (axis.horiz) {
                        axis.series.forEach(function (series) {
                            series.options.pointRange = 0;
                        });
                        // Lower level time ticks, like hours or minutes, represent
                        // points in time and not ranges. These should be aligned
                        // left in the grid cell by default. The same applies to
                        // years of higher order.
                        if (tickInfo &&
                            options.dateTimeLabelFormats &&
                            options.labels &&
                            !defined(userLabels.align) &&
                            (options.dateTimeLabelFormats[tickInfo.unitName].range === false ||
                                tickInfo.count > 1 // years
                            )) {
                            options.labels.align = 'left';
                            if (!defined(userLabels.x)) {
                                options.labels.x = 3;
                            }
                        }
                    }
                    else {
                        // Don't trim ticks which not in min/max range but
                        // they are still in the min/max plus tickInterval.
                        if (this.options.type !== 'treegrid' &&
                            axis.grid &&
                            axis.grid.columns) {
                            this.minPointOffset = this.tickInterval;
                        }
                    }
                }
            }
            /**
             * Creates a left and right wall on horizontal axes:
             * - Places leftmost tick at the start of the axis, to create a left
             *   wall
             * - Ensures that the rightmost tick is at the end of the axis, to
             *   create a right wall.
             * @private
             */
            function onAfterSetOptions(e) {
                var options = this.options,
                    userOptions = e.userOptions,
                    gridOptions = ((options && isObject(options.grid)) ? options.grid : {});
                var gridAxisOptions;
                if (gridOptions.enabled === true) {
                    // Merge the user options into default grid axis options so
                    // that when a user option is set, it takes presedence.
                    gridAxisOptions = merge(true, {
                        className: ('highcharts-grid-axis ' + (userOptions.className || '')),
                        dateTimeLabelFormats: {
                            hour: {
                                list: ['%H:%M', '%H']
                            },
                            day: {
                                list: ['%A, %e. %B', '%a, %e. %b', '%E']
                            },
                            week: {
                                list: ['Week %W', 'W%W']
                            },
                            month: {
                                list: ['%B', '%b', '%o']
                            }
                        },
                        grid: {
                            borderWidth: 1
                        },
                        labels: {
                            padding: 2,
                            style: {
                                fontSize: '13px'
                            }
                        },
                        margin: 0,
                        title: {
                            text: null,
                            reserveSpace: false,
                            rotation: 0
                        },
                        // In a grid axis, only allow one unit of certain types,
                        // for example we shouln't have one grid cell spanning
                        // two days.
                        units: [[
                                'millisecond',
                                [1, 10, 100]
                            ], [
                                'second',
                                [1, 10]
                            ], [
                                'minute',
                                [1, 5, 15]
                            ], [
                                'hour',
                                [1, 6]
                            ], [
                                'day',
                                [1]
                            ], [
                                'week',
                                [1]
                            ], [
                                'month',
                                [1]
                            ], [
                                'year',
                                null
                            ]]
                    }, userOptions);
                    // X-axis specific options
                    if (this.coll === 'xAxis') {
                        // For linked axes, tickPixelInterval is used only if
                        // the tickPositioner below doesn't run or returns
                        // undefined (like multiple years)
                        if (defined(userOptions.linkedTo) &&
                            !defined(userOptions.tickPixelInterval)) {
                            gridAxisOptions.tickPixelInterval = 350;
                        }
                        // For the secondary grid axis, use the primary axis'
                        // tick intervals and return ticks one level higher.
                        if (
                        // Check for tick pixel interval in options
                        !defined(userOptions.tickPixelInterval) &&
                            // Only for linked axes
                            defined(userOptions.linkedTo) &&
                            !defined(userOptions.tickPositioner) &&
                            !defined(userOptions.tickInterval)) {
                            gridAxisOptions.tickPositioner = function (min, max) {
                                var parentInfo = (this.linkedParent &&
                                        this.linkedParent.tickPositions &&
                                        this.linkedParent.tickPositions.info);
                                if (parentInfo) {
                                    var units = (gridAxisOptions.units || []);
                                    var unitIdx = void 0,
                                        count = void 0,
                                        unitName = void 0;
                                    for (var i = 0; i < units.length; i++) {
                                        if (units[i][0] ===
                                            parentInfo.unitName) {
                                            unitIdx = i;
                                            break;
                                        }
                                    }
                                    // Get the first allowed count on the next
                                    // unit.
                                    if (units[unitIdx + 1]) {
                                        unitName = units[unitIdx + 1][0];
                                        count =
                                            (units[unitIdx + 1][1] || [1])[0];
                                        // In case the base X axis shows years, make
                                        // the secondary axis show ten times the
                                        // years (#11427)
                                    }
                                    else if (parentInfo.unitName === 'year') {
                                        unitName = 'year';
                                        count = parentInfo.count * 10;
                                    }
                                    var unitRange = timeUnits[unitName];
                                    this.tickInterval = unitRange * count;
                                    return this.getTimeTicks({
                                        unitRange: unitRange,
                                        count: count,
                                        unitName: unitName
                                    }, min, max, this.options.startOfWeek);
                                }
                            };
                        }
                    }
                    // Now merge the combined options into the axis options
                    merge(true, this.options, gridAxisOptions);
                    if (this.horiz) {
                        /*               _________________________
                        Make this:    ___|_____|_____|_____|__|
                                        ^                     ^
                                        _________________________
                        Into this:    |_____|_____|_____|_____|
                                            ^                 ^    */
                        options.minPadding = pick(userOptions.minPadding, 0);
                        options.maxPadding = pick(userOptions.maxPadding, 0);
                    }
                    // If borderWidth is set, then use its value for tick and
                    // line width.
                    if (isNumber(options.grid.borderWidth)) {
                        options.tickWidth = options.lineWidth =
                            gridOptions.borderWidth;
                    }
                }
            }
            /**
             * @private
             */
            function onAfterSetOptions2(e) {
                var axis = this;
                var userOptions = e.userOptions;
                var gridOptions = userOptions && userOptions.grid || {};
                var columns = gridOptions.columns;
                // Add column options to the parent axis. Children has their column
                // options set on init in onGridAxisAfterInit.
                if (gridOptions.enabled && columns) {
                    merge(true, axis.options, columns[columns.length - 1]);
                }
            }
            /**
             * Handle columns and setScale.
             * @private
             */
            function onAfterSetScale() {
                var axis = this;
                (axis.grid.columns || []).forEach(function (column) {
                    column.setScale();
                });
            }
            /**
             * Draw vertical axis ticks extra long to create cell floors and roofs.
             * Overrides the tickLength for vertical axes.
             * @private
             */
            function onAfterTickSize(e) {
                var defaultLeftAxisOptions = AxisDefaults.defaultLeftAxisOptions;
                var _a = this,
                    horiz = _a.horiz,
                    maxLabelDimensions = _a.maxLabelDimensions,
                    _b = _a.options.grid,
                    gridOptions = _b === void 0 ? {} : _b;
                if (gridOptions.enabled && maxLabelDimensions) {
                    var labelPadding = (Math.abs(defaultLeftAxisOptions.labels.x) * 2);
                    var distance = horiz ?
                            gridOptions.cellHeight || labelPadding + maxLabelDimensions.height :
                            labelPadding + maxLabelDimensions.width;
                    if (isArray(e.tickSize)) {
                        e.tickSize[0] = distance;
                    }
                    else {
                        e.tickSize = [distance, 0];
                    }
                }
            }
            /**
             * @private
             */
            function onChartAfterSetChartSize() {
                this.axes.forEach(function (axis) {
                    (axis.grid && axis.grid.columns || []).forEach(function (column) {
                        column.setAxisSize();
                        column.setAxisTranslation();
                    });
                });
            }
            /**
             * @private
             */
            function onDestroy(e) {
                var grid = this.grid;
                (grid.columns || []).forEach(function (column) {
                    column.destroy(e.keepEvents);
                });
                grid.columns = void 0;
            }
            /**
             * Wraps axis init to draw cell walls on vertical axes.
             * @private
             */
            function onInit(e) {
                var axis = this;
                var userOptions = e.userOptions || {};
                var gridOptions = userOptions.grid || {};
                if (gridOptions.enabled && defined(gridOptions.borderColor)) {
                    userOptions.tickColor = userOptions.lineColor = gridOptions.borderColor;
                }
                if (!axis.grid) {
                    axis.grid = new Additions(axis);
                }
            }
            /**
             * Center tick labels in cells.
             * @private
             */
            function onTickAfterGetLabelPosition(e) {
                var tick = this,
                    label = tick.label,
                    axis = tick.axis,
                    reversed = axis.reversed,
                    chart = axis.chart,
                    options = axis.options,
                    gridOptions = options.grid || {},
                    labelOpts = axis.options.labels,
                    align = labelOpts.align, 
                    // verticalAlign is currently not supported for axis.labels.
                    verticalAlign = 'middle', // labelOpts.verticalAlign,
                    side = GridAxis.Side[axis.side],
                    tickmarkOffset = e.tickmarkOffset,
                    tickPositions = axis.tickPositions,
                    tickPos = tick.pos - tickmarkOffset,
                    nextTickPos = (isNumber(tickPositions[e.index + 1]) ?
                        tickPositions[e.index + 1] - tickmarkOffset :
                        (axis.max || 0) + tickmarkOffset),
                    tickSize = axis.tickSize('tick'),
                    tickWidth = tickSize ? tickSize[0] : 0,
                    crispCorr = tickSize ? tickSize[1] / 2 : 0;
                var labelHeight,
                    lblMetrics,
                    lines,
                    bottom,
                    top,
                    left,
                    right;
                // Only center tick labels in grid axes
                if (gridOptions.enabled === true) {
                    // Calculate top and bottom positions of the cell.
                    if (side === 'top') {
                        bottom = axis.top + axis.offset;
                        top = bottom - tickWidth;
                    }
                    else if (side === 'bottom') {
                        top = chart.chartHeight - axis.bottom + axis.offset;
                        bottom = top + tickWidth;
                    }
                    else {
                        bottom = axis.top + axis.len - (axis.translate(reversed ? nextTickPos : tickPos) || 0);
                        top = axis.top + axis.len - (axis.translate(reversed ? tickPos : nextTickPos) || 0);
                    }
                    // Calculate left and right positions of the cell.
                    if (side === 'right') {
                        left = chart.chartWidth - axis.right + axis.offset;
                        right = left + tickWidth;
                    }
                    else if (side === 'left') {
                        right = axis.left + axis.offset;
                        left = right - tickWidth;
                    }
                    else {
                        left = Math.round(axis.left + (axis.translate(reversed ? nextTickPos : tickPos) || 0)) - crispCorr;
                        right = Math.min(// #15742
                        Math.round(axis.left + (axis.translate(reversed ? tickPos : nextTickPos) || 0)) - crispCorr, axis.left + axis.len);
                    }
                    tick.slotWidth = right - left;
                    // Calculate the positioning of the label based on
                    // alignment.
                    e.pos.x = (align === 'left' ?
                        left :
                        align === 'right' ?
                            right :
                            left + ((right - left) / 2) // default to center
                    );
                    e.pos.y = (verticalAlign === 'top' ?
                        top :
                        verticalAlign === 'bottom' ?
                            bottom :
                            top + ((bottom - top) / 2) // default to middle
                    );
                    lblMetrics = chart.renderer.fontMetrics(labelOpts.style.fontSize, label && label.element);
                    labelHeight = label ? label.getBBox().height : 0;
                    // Adjustment to y position to align the label correctly.
                    // Would be better to have a setter or similar for this.
                    if (!labelOpts.useHTML) {
                        lines = Math.round(labelHeight / lblMetrics.h);
                        e.pos.y += (
                        // Center the label
                        // TODO: why does this actually center the label?
                        ((lblMetrics.b - (lblMetrics.h - lblMetrics.f)) / 2) +
                            // Adjust for height of additional lines.
                            -(((lines - 1) * lblMetrics.h) / 2));
                    }
                    else {
                        e.pos.y += (
                        // Readjust yCorr in htmlUpdateTransform
                        lblMetrics.b +
                            // Adjust for height of html label
                            -(labelHeight / 2));
                    }
                    e.pos.x += (axis.horiz && labelOpts.x) || 0;
                }
            }
            /**
             * @private
             */
            function onTickLabelFormat(ctx) {
                var axis = ctx.axis,
                    value = ctx.value;
                if (axis.options.grid &&
                    axis.options.grid.enabled) {
                    var tickPos = axis.tickPositions;
                    var series = (axis.linkedParent || axis).series[0];
                    var isFirst = value === tickPos[0];
                    var isLast = value === tickPos[tickPos.length - 1];
                    var point = series && find(series.options.data,
                        function (p) {
                            return p[axis.isXAxis ? 'x' : 'y'] === value;
                    });
                    var pointCopy = void 0;
                    if (point && series.is('gantt')) {
                        // For the Gantt set point aliases to the pointCopy
                        // to do not change the original point
                        pointCopy = merge(point);
                        H.seriesTypes.gantt.prototype.pointClass
                            .setGanttPointAliases(pointCopy);
                    }
                    // Make additional properties available for the
                    // formatter
                    ctx.isFirst = isFirst;
                    ctx.isLast = isLast;
                    ctx.point = pointCopy;
                }
            }
            /**
             * Makes tick labels which are usually ignored in a linked axis
             * displayed if they are within range of linkedParent.min.
             * ```
             *                        _____________________________
             *                        |   |       |       |       |
             * Make this:             |   |   2   |   3   |   4   |
             *                        |___|_______|_______|_______|
             *                          ^
             *                        _____________________________
             *                        |   |       |       |       |
             * Into this:             | 1 |   2   |   3   |   4   |
             *                        |___|_______|_______|_______|
             *                          ^
             * ```
             * @private
             * @todo Does this function do what the drawing says? Seems to affect
             *       ticks and not the labels directly?
             */
            function onTrimTicks() {
                var axis = this;
                var options = axis.options;
                var gridOptions = options.grid || {};
                var categoryAxis = axis.categories;
                var tickPositions = axis.tickPositions;
                var firstPos = tickPositions[0];
                var lastPos = tickPositions[tickPositions.length - 1];
                var linkedMin = axis.linkedParent && axis.linkedParent.min;
                var linkedMax = axis.linkedParent && axis.linkedParent.max;
                var min = linkedMin || axis.min;
                var max = linkedMax || axis.max;
                var tickInterval = axis.tickInterval;
                var endMoreThanMin = (firstPos < min &&
                        firstPos + tickInterval > min);
                var startLessThanMax = (lastPos > max &&
                        lastPos - tickInterval < max);
                if (gridOptions.enabled === true &&
                    !categoryAxis &&
                    (axis.horiz || axis.isLinked)) {
                    if (endMoreThanMin && !options.startOnTick) {
                        tickPositions[0] = min;
                    }
                    if (startLessThanMax && !options.endOnTick) {
                        tickPositions[tickPositions.length - 1] = max;
                    }
                }
            }
            /**
             * Avoid altering tickInterval when reserving space.
             * @private
             */
            function wrapUnsquish(proceed) {
                var axis = this;
                var _a = axis.options.grid,
                    gridOptions = _a === void 0 ? {} : _a;
                if (gridOptions.enabled === true && axis.categories) {
                    return axis.tickInterval;
                }
                return proceed.apply(axis, argsToArray(arguments));
            }
            /* *
             *
             *  Class
             *
             * */
            /**
             * Additions for grid axes.
             * @private
             * @class
             */
            var Additions = /** @class */ (function () {
                    /* *
                    *
                    *  Constructors
                    *
                    * */
                    function Additions(axis) {
                        this.axis = axis;
                }
                /* *
                *
                *  Functions
                *
                * */
                /**
                 * Checks if an axis is the outer axis in its dimension. Since
                 * axes are placed outwards in order, the axis with the highest
                 * index is the outermost axis.
                 *
                 * Example: If there are multiple x-axes at the top of the chart,
                 * this function returns true if the axis supplied is the last
                 * of the x-axes.
                 *
                 * @private
                 *
                 * @return {boolean}
                 * True if the axis is the outermost axis in its dimension; false if
                 * not.
                 */
                Additions.prototype.isOuterAxis = function () {
                    var axis = this.axis;
                    var chart = axis.chart;
                    var columnIndex = axis.grid.columnIndex;
                    var columns = (axis.linkedParent && axis.linkedParent.grid.columns ||
                            axis.grid.columns);
                    var parentAxis = columnIndex ? axis.linkedParent : axis;
                    var thisIndex = -1,
                        lastIndex = 0;
                    chart[axis.coll].forEach(function (otherAxis, index) {
                        if (otherAxis.side === axis.side && !otherAxis.options.isInternal) {
                            lastIndex = index;
                            if (otherAxis === parentAxis) {
                                // Get the index of the axis in question
                                thisIndex = index;
                            }
                        }
                    });
                    return (lastIndex === thisIndex &&
                        (isNumber(columnIndex) ? columns.length === columnIndex : true));
                };
                /**
                 * Add extra border based on the provided path.
                 *  *
                 * @private
                 *
                 * @param {SVGPath} path
                 * The path of the border.
                 *
                 * @return {Highcharts.SVGElement}
                 */
                Additions.prototype.renderBorder = function (path) {
                    var axis = this.axis,
                        renderer = axis.chart.renderer,
                        options = axis.options,
                        extraBorderLine = renderer.path(path)
                            .addClass('highcharts-axis-line')
                            .add(axis.axisBorder);
                    if (!renderer.styledMode) {
                        extraBorderLine.attr({
                            stroke: options.lineColor,
                            'stroke-width': options.lineWidth,
                            zIndex: 7
                        });
                    }
                    return extraBorderLine;
                };
                return Additions;
            }());
            GridAxis.Additions = Additions;
        })(GridAxis || (GridAxis = {}));
        /* *
         *
         *  Registry
         *
         * */
        // First letter of the day of the week, e.g. 'M' for 'Monday'.
        dateFormats.E = function (timestamp) {
            return this.dateFormat('%a', timestamp, true).charAt(0);
        };
        // Adds week date format
        dateFormats.W = function (timestamp) {
            var d = new this.Date(timestamp);
            var firstDay = (this.get('Day',
                d) + 6) % 7;
            var thursday = new this.Date(d.valueOf());
            this.set('Date', thursday, this.get('Date', d) - firstDay + 3);
            var firstThursday = new this.Date(this.get('FullYear',
                thursday), 0, 1);
            if (this.get('Day', firstThursday) !== 4) {
                this.set('Month', d, 0);
                this.set('Date', d, 1 + (11 - this.get('Day', firstThursday)) % 7);
            }
            return (1 +
                Math.floor((thursday.valueOf() - firstThursday.valueOf()) / 604800000)).toString();
        };
        /* *
         *
         *  Default Export
         *
         * */
        /* *
         *
         *  API Options
         *
         * */
        /**
         * @productdesc {gantt}
         * For grid axes (like in Gantt charts),
         * it is possible to declare as a list to provide different
         * formats depending on available space.
         *
         * Defaults to:
         * ```js
         * {
         *     hour: { list: ['%H:%M', '%H'] },
         *     day: { list: ['%A, %e. %B', '%a, %e. %b', '%E'] },
         *     week: { list: ['Week %W', 'W%W'] },
         *     month: { list: ['%B', '%b', '%o'] }
         * }
         * ```
         *
         * @sample {gantt} gantt/grid-axis/date-time-label-formats
         *         Gantt chart with custom axis date format.
         *
         * @apioption xAxis.dateTimeLabelFormats
         */
        /**
         * Set grid options for the axis labels. Requires Highcharts Gantt.
         *
         * @since     6.2.0
         * @product   gantt
         * @apioption xAxis.grid
         */
        /**
         * Enable grid on the axis labels. Defaults to true for Gantt charts.
         *
         * @type      {boolean}
         * @default   true
         * @since     6.2.0
         * @product   gantt
         * @apioption xAxis.grid.enabled
         */
        /**
         * Set specific options for each column (or row for horizontal axes) in the
         * grid. Each extra column/row is its own axis, and the axis options can be set
         * here.
         *
         * @sample gantt/demo/left-axis-table
         *         Left axis as a table
         *
         * @type      {Array<Highcharts.XAxisOptions>}
         * @apioption xAxis.grid.columns
         */
        /**
         * Set border color for the label grid lines.
         *
         * @type      {Highcharts.ColorString}
         * @apioption xAxis.grid.borderColor
         */
        /**
         * Set border width of the label grid lines.
         *
         * @type      {number}
         * @default   1
         * @apioption xAxis.grid.borderWidth
         */
        /**
         * Set cell height for grid axis labels. By default this is calculated from font
         * size. This option only applies to horizontal axes.
         *
         * @sample gantt/grid-axis/cellheight
         *         Gant chart with custom cell height
         * @type      {number}
         * @apioption xAxis.grid.cellHeight
         */
        ''; // keeps doclets above in JS file

        return GridAxis;
    });
    _registerModule(_modules, 'masters/modules/grid-axis.src.js', [_modules['Core/Globals.js'], _modules['Core/Axis/GridAxis.js']], function (Highcharts, GridAxis) {

        var G = Highcharts;
        // Compositions
        GridAxis.compose(G.Axis, G.Chart, G.Tick);

    });
}));