505 lines
22 KiB
JavaScript
505 lines
22 KiB
JavaScript
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/* *
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*
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* License: www.highcharts.com/license
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* Author: Torstein Honsi, Christer Vasseng
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*
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* This module serves as a fallback for the Boost module in IE9 and IE10. Newer
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* browsers support WebGL which is faster.
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*
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* It is recommended to include this module in conditional comments targeting
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* IE9 and IE10.
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*
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* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
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*
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* */
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'use strict';
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import H from '../parts/Globals.js';
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import Color from '../parts/Color.js';
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var color = Color.parse;
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import U from '../parts/Utilities.js';
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var addEvent = U.addEvent, extend = U.extend, fireEvent = U.fireEvent, isNumber = U.isNumber, merge = U.merge, pick = U.pick, wrap = U.wrap;
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import '../parts/Series.js';
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import '../parts/Options.js';
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var win = H.win, doc = win.document, noop = function () { }, Series = H.Series, seriesTypes = H.seriesTypes, CHUNK_SIZE = 50000, destroyLoadingDiv;
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/* eslint-disable no-invalid-this, valid-jsdoc */
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/**
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* Initialize the canvas boost.
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*
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* @function Highcharts.initCanvasBoost
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*/
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H.initCanvasBoost = function () {
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if (H.seriesTypes.heatmap) {
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wrap(H.seriesTypes.heatmap.prototype, 'drawPoints', function () {
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var chart = this.chart, ctx = this.getContext(), inverted = this.chart.inverted, xAxis = this.xAxis, yAxis = this.yAxis;
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if (ctx) {
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// draw the columns
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this.points.forEach(function (point) {
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var plotY = point.plotY, shapeArgs, pointAttr;
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if (typeof plotY !== 'undefined' &&
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!isNaN(plotY) &&
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point.y !== null) {
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shapeArgs = point.shapeArgs;
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if (!chart.styledMode) {
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pointAttr = point.series.pointAttribs(point);
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}
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else {
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pointAttr = point.series.colorAttribs(point);
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}
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ctx.fillStyle = pointAttr.fill;
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if (inverted) {
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ctx.fillRect(yAxis.len - shapeArgs.y + xAxis.left, xAxis.len - shapeArgs.x + yAxis.top, -shapeArgs.height, -shapeArgs.width);
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}
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else {
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ctx.fillRect(shapeArgs.x + xAxis.left, shapeArgs.y + yAxis.top, shapeArgs.width, shapeArgs.height);
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}
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}
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});
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this.canvasToSVG();
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}
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else {
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this.chart.showLoading('Your browser doesn\'t support HTML5 canvas, <br>' +
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'please use a modern browser');
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// Uncomment this to provide low-level (slow) support in oldIE.
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// It will cause script errors on charts with more than a few
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// thousand points.
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// arguments[0].call(this);
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}
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});
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}
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extend(Series.prototype, {
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/**
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* Create a hidden canvas to draw the graph on. The contents is later
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* copied over to an SVG image element.
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*
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* @private
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* @function Highcharts.Series#getContext
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*/
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getContext: function () {
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var chart = this.chart, width = chart.chartWidth, height = chart.chartHeight, targetGroup = chart.seriesGroup || this.group, target = this, ctx, swapXY = function (proceed, x, y, a, b, c, d) {
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proceed.call(this, y, x, a, b, c, d);
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};
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if (chart.isChartSeriesBoosting()) {
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target = chart;
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targetGroup = chart.seriesGroup;
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}
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ctx = target.ctx;
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if (!target.canvas) {
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target.canvas = doc.createElement('canvas');
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target.renderTarget = chart.renderer
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.image('', 0, 0, width, height)
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.addClass('highcharts-boost-canvas')
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.add(targetGroup);
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target.ctx = ctx = target.canvas.getContext('2d');
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if (chart.inverted) {
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['moveTo', 'lineTo', 'rect', 'arc'].forEach(function (fn) {
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wrap(ctx, fn, swapXY);
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});
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}
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target.boostCopy = function () {
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target.renderTarget.attr({
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href: target.canvas.toDataURL('image/png')
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});
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};
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target.boostClear = function () {
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ctx.clearRect(0, 0, target.canvas.width, target.canvas.height);
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if (target === this) {
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target.renderTarget.attr({ href: '' });
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}
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};
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target.boostClipRect = chart.renderer.clipRect();
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target.renderTarget.clip(target.boostClipRect);
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}
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else if (!(target instanceof H.Chart)) {
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// ctx.clearRect(0, 0, width, height);
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}
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if (target.canvas.width !== width) {
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target.canvas.width = width;
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}
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if (target.canvas.height !== height) {
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target.canvas.height = height;
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}
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target.renderTarget.attr({
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x: 0,
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y: 0,
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width: width,
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height: height,
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style: 'pointer-events: none',
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href: ''
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});
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target.boostClipRect.attr(chart.getBoostClipRect(target));
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return ctx;
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},
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/**
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* Draw the canvas image inside an SVG image
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*
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* @private
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* @function Highcharts.Series#canvasToSVG
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*/
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canvasToSVG: function () {
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if (!this.chart.isChartSeriesBoosting()) {
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if (this.boostCopy || this.chart.boostCopy) {
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(this.boostCopy || this.chart.boostCopy)();
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}
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}
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else {
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if (this.boostClear) {
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this.boostClear();
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}
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}
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},
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cvsLineTo: function (ctx, clientX, plotY) {
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ctx.lineTo(clientX, plotY);
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},
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renderCanvas: function () {
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var series = this, options = series.options, chart = series.chart, xAxis = this.xAxis, yAxis = this.yAxis, activeBoostSettings = chart.options.boost || {}, boostSettings = {
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timeRendering: activeBoostSettings.timeRendering || false,
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timeSeriesProcessing: activeBoostSettings.timeSeriesProcessing || false,
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timeSetup: activeBoostSettings.timeSetup || false
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}, ctx, c = 0, xData = series.processedXData, yData = series.processedYData, rawData = options.data, xExtremes = xAxis.getExtremes(), xMin = xExtremes.min, xMax = xExtremes.max, yExtremes = yAxis.getExtremes(), yMin = yExtremes.min, yMax = yExtremes.max, pointTaken = {}, lastClientX, sampling = !!series.sampling, points, r = options.marker && options.marker.radius, cvsDrawPoint = this.cvsDrawPoint, cvsLineTo = options.lineWidth ? this.cvsLineTo : void 0, cvsMarker = (r && r <= 1 ?
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this.cvsMarkerSquare :
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this.cvsMarkerCircle), strokeBatch = this.cvsStrokeBatch || 1000, enableMouseTracking = options.enableMouseTracking !== false, lastPoint, threshold = options.threshold, yBottom = yAxis.getThreshold(threshold), hasThreshold = isNumber(threshold), translatedThreshold = yBottom, doFill = this.fill, isRange = (series.pointArrayMap &&
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series.pointArrayMap.join(',') === 'low,high'), isStacked = !!options.stacking, cropStart = series.cropStart || 0, loadingOptions = chart.options.loading, requireSorting = series.requireSorting, wasNull, connectNulls = options.connectNulls, useRaw = !xData, minVal, maxVal, minI, maxI, index, sdata = (isStacked ?
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series.data :
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(xData || rawData)), fillColor = (series.fillOpacity ?
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new Color(series.color).setOpacity(pick(options.fillOpacity, 0.75)).get() :
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series.color),
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//
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stroke = function () {
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if (doFill) {
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ctx.fillStyle = fillColor;
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ctx.fill();
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}
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else {
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ctx.strokeStyle = series.color;
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ctx.lineWidth = options.lineWidth;
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ctx.stroke();
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}
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},
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//
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drawPoint = function (clientX, plotY, yBottom, i) {
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if (c === 0) {
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ctx.beginPath();
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if (cvsLineTo) {
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ctx.lineJoin = 'round';
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}
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}
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if (chart.scroller &&
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series.options.className ===
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'highcharts-navigator-series') {
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plotY += chart.scroller.top;
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if (yBottom) {
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yBottom += chart.scroller.top;
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}
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}
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else {
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plotY += chart.plotTop;
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}
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clientX += chart.plotLeft;
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if (wasNull) {
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ctx.moveTo(clientX, plotY);
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}
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else {
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if (cvsDrawPoint) {
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cvsDrawPoint(ctx, clientX, plotY, yBottom, lastPoint);
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}
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else if (cvsLineTo) {
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cvsLineTo(ctx, clientX, plotY);
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}
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else if (cvsMarker) {
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cvsMarker.call(series, ctx, clientX, plotY, r, i);
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}
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}
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// We need to stroke the line for every 1000 pixels. It will
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// crash the browser memory use if we stroke too
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// infrequently.
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c = c + 1;
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if (c === strokeBatch) {
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stroke();
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c = 0;
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}
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// Area charts need to keep track of the last point
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lastPoint = {
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clientX: clientX,
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plotY: plotY,
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yBottom: yBottom
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};
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},
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//
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compareX = options.findNearestPointBy === 'x',
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//
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xDataFull = (this.xData ||
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this.options.xData ||
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this.processedXData ||
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false),
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//
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addKDPoint = function (clientX, plotY, i) {
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// Shaves off about 60ms compared to repeated concatenation
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index = compareX ? clientX : clientX + ',' + plotY;
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// The k-d tree requires series points.
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// Reduce the amount of points, since the time to build the
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// tree increases exponentially.
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if (enableMouseTracking && !pointTaken[index]) {
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pointTaken[index] = true;
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if (chart.inverted) {
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clientX = xAxis.len - clientX;
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plotY = yAxis.len - plotY;
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}
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points.push({
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x: xDataFull ?
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xDataFull[cropStart + i] :
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false,
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clientX: clientX,
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plotX: clientX,
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plotY: plotY,
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i: cropStart + i
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});
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}
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};
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if (this.renderTarget) {
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this.renderTarget.attr({ 'href': '' });
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}
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// If we are zooming out from SVG mode, destroy the graphics
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if (this.points || this.graph) {
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this.destroyGraphics();
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}
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// The group
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series.plotGroup('group', 'series', series.visible ? 'visible' : 'hidden', options.zIndex, chart.seriesGroup);
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series.markerGroup = series.group;
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addEvent(series, 'destroy', function () {
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// Prevent destroy twice
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series.markerGroup = null;
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});
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points = this.points = [];
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ctx = this.getContext();
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series.buildKDTree = noop; // Do not start building while drawing
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if (this.boostClear) {
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this.boostClear();
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}
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// if (this.canvas) {
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// ctx.clearRect(
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// 0,
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// 0,
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// this.canvas.width,
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// this.canvas.height
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// );
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// }
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if (!this.visible) {
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return;
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}
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// Display a loading indicator
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if (rawData.length > 99999) {
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chart.options.loading = merge(loadingOptions, {
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labelStyle: {
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backgroundColor: color('#ffffff').setOpacity(0.75).get(),
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padding: '1em',
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borderRadius: '0.5em'
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},
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style: {
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backgroundColor: 'none',
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opacity: 1
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}
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});
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U.clearTimeout(destroyLoadingDiv);
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chart.showLoading('Drawing...');
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chart.options.loading = loadingOptions; // reset
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}
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if (boostSettings.timeRendering) {
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console.time('canvas rendering'); // eslint-disable-line no-console
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}
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// Loop over the points
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H.eachAsync(sdata, function (d, i) {
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var x, y, clientX, plotY, isNull, low, isNextInside = false, isPrevInside = false, nx = false, px = false, chartDestroyed = typeof chart.index === 'undefined', isYInside = true;
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if (!chartDestroyed) {
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if (useRaw) {
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x = d[0];
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y = d[1];
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if (sdata[i + 1]) {
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nx = sdata[i + 1][0];
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}
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if (sdata[i - 1]) {
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px = sdata[i - 1][0];
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}
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}
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else {
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x = d;
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y = yData[i];
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if (sdata[i + 1]) {
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nx = sdata[i + 1];
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}
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if (sdata[i - 1]) {
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px = sdata[i - 1];
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}
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}
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if (nx && nx >= xMin && nx <= xMax) {
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isNextInside = true;
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}
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if (px && px >= xMin && px <= xMax) {
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isPrevInside = true;
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}
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// Resolve low and high for range series
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if (isRange) {
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if (useRaw) {
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y = d.slice(1, 3);
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}
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low = y[0];
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y = y[1];
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}
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else if (isStacked) {
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x = d.x;
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y = d.stackY;
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low = y - d.y;
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}
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isNull = y === null;
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// Optimize for scatter zooming
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if (!requireSorting) {
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isYInside = y >= yMin && y <= yMax;
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}
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if (!isNull &&
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((x >= xMin && x <= xMax && isYInside) ||
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(isNextInside || isPrevInside))) {
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clientX = Math.round(xAxis.toPixels(x, true));
|
||
|
|
if (sampling) {
|
||
|
|
if (typeof minI === 'undefined' ||
|
||
|
|
clientX === lastClientX) {
|
||
|
|
if (!isRange) {
|
||
|
|
low = y;
|
||
|
|
}
|
||
|
|
if (typeof maxI === 'undefined' || y > maxVal) {
|
||
|
|
maxVal = y;
|
||
|
|
maxI = i;
|
||
|
|
}
|
||
|
|
if (typeof minI === 'undefined' ||
|
||
|
|
low < minVal) {
|
||
|
|
minVal = low;
|
||
|
|
minI = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Add points and reset
|
||
|
|
if (clientX !== lastClientX) {
|
||
|
|
// maxI also a number:
|
||
|
|
if (typeof minI !== 'undefined') {
|
||
|
|
plotY = yAxis.toPixels(maxVal, true);
|
||
|
|
yBottom = yAxis.toPixels(minVal, true);
|
||
|
|
drawPoint(clientX, hasThreshold ?
|
||
|
|
Math.min(plotY, translatedThreshold) : plotY, hasThreshold ?
|
||
|
|
Math.max(yBottom, translatedThreshold) : yBottom, i);
|
||
|
|
addKDPoint(clientX, plotY, maxI);
|
||
|
|
if (yBottom !== plotY) {
|
||
|
|
addKDPoint(clientX, yBottom, minI);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
minI = maxI = void 0;
|
||
|
|
lastClientX = clientX;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
plotY = Math.round(yAxis.toPixels(y, true));
|
||
|
|
drawPoint(clientX, plotY, yBottom, i);
|
||
|
|
addKDPoint(clientX, plotY, i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
wasNull = isNull && !connectNulls;
|
||
|
|
if (i % CHUNK_SIZE === 0) {
|
||
|
|
if (series.boostCopy || series.chart.boostCopy) {
|
||
|
|
(series.boostCopy || series.chart.boostCopy)();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return !chartDestroyed;
|
||
|
|
}, function () {
|
||
|
|
var loadingDiv = chart.loadingDiv, loadingShown = chart.loadingShown;
|
||
|
|
stroke();
|
||
|
|
// if (series.boostCopy || series.chart.boostCopy) {
|
||
|
|
// (series.boostCopy || series.chart.boostCopy)();
|
||
|
|
// }
|
||
|
|
series.canvasToSVG();
|
||
|
|
if (boostSettings.timeRendering) {
|
||
|
|
console.timeEnd('canvas rendering'); // eslint-disable-line no-console
|
||
|
|
}
|
||
|
|
fireEvent(series, 'renderedCanvas');
|
||
|
|
// Do not use chart.hideLoading, as it runs JS animation and
|
||
|
|
// will be blocked by buildKDTree. CSS animation looks good, but
|
||
|
|
// then it must be deleted in timeout. If we add the module to
|
||
|
|
// core, change hideLoading so we can skip this block.
|
||
|
|
if (loadingShown) {
|
||
|
|
extend(loadingDiv.style, {
|
||
|
|
transition: 'opacity 250ms',
|
||
|
|
opacity: 0
|
||
|
|
});
|
||
|
|
chart.loadingShown = false;
|
||
|
|
destroyLoadingDiv = setTimeout(function () {
|
||
|
|
if (loadingDiv.parentNode) { // In exporting it is falsy
|
||
|
|
loadingDiv.parentNode.removeChild(loadingDiv);
|
||
|
|
}
|
||
|
|
chart.loadingDiv = chart.loadingSpan = null;
|
||
|
|
}, 250);
|
||
|
|
}
|
||
|
|
// Go back to prototype, ready to build
|
||
|
|
delete series.buildKDTree;
|
||
|
|
series.buildKDTree();
|
||
|
|
// Don't do async on export, the exportChart, getSVGForExport and
|
||
|
|
// getSVG methods are not chained for it.
|
||
|
|
}, chart.renderer.forExport ? Number.MAX_VALUE : void 0);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
seriesTypes.scatter.prototype.cvsMarkerCircle = function (ctx, clientX, plotY, r) {
|
||
|
|
ctx.moveTo(clientX, plotY);
|
||
|
|
ctx.arc(clientX, plotY, r, 0, 2 * Math.PI, false);
|
||
|
|
};
|
||
|
|
// Rect is twice as fast as arc, should be used for small markers
|
||
|
|
seriesTypes.scatter.prototype.cvsMarkerSquare = function (ctx, clientX, plotY, r) {
|
||
|
|
ctx.rect(clientX - r, plotY - r, r * 2, r * 2);
|
||
|
|
};
|
||
|
|
seriesTypes.scatter.prototype.fill = true;
|
||
|
|
if (seriesTypes.bubble) {
|
||
|
|
seriesTypes.bubble.prototype.cvsMarkerCircle = function (ctx, clientX, plotY, r, i) {
|
||
|
|
ctx.moveTo(clientX, plotY);
|
||
|
|
ctx.arc(clientX, plotY, this.radii && this.radii[i], 0, 2 * Math.PI, false);
|
||
|
|
};
|
||
|
|
seriesTypes.bubble.prototype.cvsStrokeBatch = 1;
|
||
|
|
}
|
||
|
|
extend(seriesTypes.area.prototype, {
|
||
|
|
cvsDrawPoint: function (ctx, clientX, plotY, yBottom, lastPoint) {
|
||
|
|
if (lastPoint && clientX !== lastPoint.clientX) {
|
||
|
|
ctx.moveTo(lastPoint.clientX, lastPoint.yBottom);
|
||
|
|
ctx.lineTo(lastPoint.clientX, lastPoint.plotY);
|
||
|
|
ctx.lineTo(clientX, plotY);
|
||
|
|
ctx.lineTo(clientX, yBottom);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
fill: true,
|
||
|
|
fillOpacity: true,
|
||
|
|
sampling: true
|
||
|
|
});
|
||
|
|
extend(seriesTypes.column.prototype, {
|
||
|
|
cvsDrawPoint: function (ctx, clientX, plotY, yBottom) {
|
||
|
|
ctx.rect(clientX - 1, plotY, 1, yBottom - plotY);
|
||
|
|
},
|
||
|
|
fill: true,
|
||
|
|
sampling: true
|
||
|
|
});
|
||
|
|
H.Chart.prototype.callbacks.push(function (chart) {
|
||
|
|
/**
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function canvasToSVG() {
|
||
|
|
if (chart.boostCopy) {
|
||
|
|
chart.boostCopy();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function clear() {
|
||
|
|
if (chart.renderTarget) {
|
||
|
|
chart.renderTarget.attr({ href: '' });
|
||
|
|
}
|
||
|
|
if (chart.canvas) {
|
||
|
|
chart.canvas.getContext('2d').clearRect(0, 0, chart.canvas.width, chart.canvas.height);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
addEvent(chart, 'predraw', clear);
|
||
|
|
addEvent(chart, 'render', canvasToSVG);
|
||
|
|
});
|
||
|
|
};
|