458 lines
20 KiB
JavaScript
458 lines
20 KiB
JavaScript
/**
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* @license Highcharts JS v5.0.2 (2016-10-26)
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* Client side exporting module
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*
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* (c) 2015 Torstein Honsi / Oystein Moseng
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*
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* License: www.highcharts.com/license
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*/
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(function(factory) {
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if (typeof module === 'object' && module.exports) {
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module.exports = factory;
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} else {
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factory(Highcharts);
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}
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}(function(Highcharts) {
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(function(Highcharts) {
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/**
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* Client side exporting module
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*
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* (c) 2015 Torstein Honsi / Oystein Moseng
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*
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* License: www.highcharts.com/license
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*/
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'use strict';
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/*global MSBlobBuilder */
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var merge = Highcharts.merge,
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win = Highcharts.win,
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nav = win.navigator,
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doc = win.document,
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each = Highcharts.each,
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domurl = win.URL || win.webkitURL || win,
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isMSBrowser = /Edge\/|Trident\/|MSIE /.test(nav.userAgent),
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loadEventDeferDelay = isMSBrowser ? 150 : 0; // Milliseconds to defer image load event handlers to offset IE bug
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// Dummy object so we can reuse our canvas-tools.js without errors
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Highcharts.CanVGRenderer = {};
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/**
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* Downloads a script and executes a callback when done.
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* @param {String} scriptLocation
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* @param {Function} callback
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*/
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function getScript(scriptLocation, callback) {
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var head = doc.getElementsByTagName('head')[0],
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script = doc.createElement('script');
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script.type = 'text/javascript';
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script.src = scriptLocation;
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script.onload = callback;
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script.onerror = function() {
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console.error('Error loading script', scriptLocation); // eslint-disable-line no-console
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};
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head.appendChild(script);
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}
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// Download contents by dataURL/blob
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Highcharts.downloadURL = function(dataURL, filename) {
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var a = doc.createElement('a'),
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windowRef;
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// IE specific blob implementation
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if (nav.msSaveOrOpenBlob) {
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nav.msSaveOrOpenBlob(dataURL, filename);
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return;
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}
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// Try HTML5 download attr if supported
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if (a.download !== undefined) {
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a.href = dataURL;
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a.download = filename; // HTML5 download attribute
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a.target = '_blank';
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doc.body.appendChild(a);
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a.click();
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doc.body.removeChild(a);
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} else {
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// No download attr, just opening data URI
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try {
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windowRef = win.open(dataURL, 'chart');
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if (windowRef === undefined || windowRef === null) {
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throw 'Failed to open window';
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}
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} catch (e) {
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// window.open failed, trying location.href
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win.location.href = dataURL;
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}
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}
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};
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// Get blob URL from SVG code. Falls back to normal data URI.
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Highcharts.svgToDataUrl = function(svg) {
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var webKit = nav.userAgent.indexOf('WebKit') > -1 && nav.userAgent.indexOf('Chrome') < 0; // Webkit and not chrome
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try {
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// Safari requires data URI since it doesn't allow navigation to blob URLs
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// Firefox has an issue with Blobs and internal references, leading to gradients not working using Blobs (#4550)
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if (!webKit && nav.userAgent.toLowerCase().indexOf('firefox') < 0) {
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return domurl.createObjectURL(new win.Blob([svg], {
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type: 'image/svg+xml;charset-utf-16'
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}));
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}
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} catch (e) {
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// Ignore
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}
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return 'data:image/svg+xml;charset=UTF-8,' + encodeURIComponent(svg);
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};
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// Get data:URL from image URL
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// Pass in callbacks to handle results. finallyCallback is always called at the end of the process. Supplying this callback is optional.
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// All callbacks receive four arguments: imageURL, imageType, callbackArgs and scale. callbackArgs is used only by callbacks and can contain whatever.
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Highcharts.imageToDataUrl = function(imageURL, imageType, callbackArgs, scale, successCallback, taintedCallback, noCanvasSupportCallback, failedLoadCallback, finallyCallback) {
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var img = new win.Image(),
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taintedHandler,
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loadHandler = function() {
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setTimeout(function() {
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var canvas = doc.createElement('canvas'),
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ctx = canvas.getContext && canvas.getContext('2d'),
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dataURL;
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try {
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if (!ctx) {
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noCanvasSupportCallback(imageURL, imageType, callbackArgs, scale);
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} else {
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canvas.height = img.height * scale;
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canvas.width = img.width * scale;
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ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
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// Now we try to get the contents of the canvas.
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try {
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dataURL = canvas.toDataURL(imageType);
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successCallback(dataURL, imageType, callbackArgs, scale);
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} catch (e) {
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taintedHandler(imageURL, imageType, callbackArgs, scale);
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}
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}
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} finally {
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if (finallyCallback) {
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finallyCallback(imageURL, imageType, callbackArgs, scale);
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}
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}
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}, loadEventDeferDelay); // IE bug where image is not always ready despite calling load event.
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},
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// Image load failed (e.g. invalid URL)
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errorHandler = function() {
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failedLoadCallback(imageURL, imageType, callbackArgs, scale);
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if (finallyCallback) {
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finallyCallback(imageURL, imageType, callbackArgs, scale);
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}
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};
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// This is called on load if the image drawing to canvas failed with a security error.
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// We retry the drawing with crossOrigin set to Anonymous.
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taintedHandler = function() {
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img = new win.Image();
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taintedHandler = taintedCallback;
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img.crossOrigin = 'Anonymous'; // Must be set prior to loading image source
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img.onload = loadHandler;
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img.onerror = errorHandler;
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img.src = imageURL;
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};
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img.onload = loadHandler;
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img.onerror = errorHandler;
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img.src = imageURL;
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};
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/**
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* Get data URL to an image of an SVG and call download on it
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*
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* options object:
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* filename: Name of resulting downloaded file without extension
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* type: File type of resulting download
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* scale: Scaling factor of downloaded image compared to source
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* libURL: URL pointing to location of dependency scripts to download on demand
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*/
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Highcharts.downloadSVGLocal = function(svg, options, failCallback, successCallback) {
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var svgurl,
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blob,
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objectURLRevoke = true,
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finallyHandler,
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libURL = options.libURL || Highcharts.getOptions().exporting.libURL,
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dummySVGContainer = doc.createElement('div'),
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imageType = options.type || 'image/png',
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filename = (options.filename || 'chart') + '.' + (imageType === 'image/svg+xml' ? 'svg' : imageType.split('/')[1]),
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scale = options.scale || 1;
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libURL = libURL.slice(-1) !== '/' ? libURL + '/' : libURL; // Allow libURL to end with or without fordward slash
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function svgToPdf(svgElement, margin) {
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var width = svgElement.width.baseVal.value + 2 * margin,
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height = svgElement.height.baseVal.value + 2 * margin,
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pdf = new win.jsPDF('l', 'pt', [width, height]); // eslint-disable-line new-cap
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win.svgElementToPdf(svgElement, pdf, {
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removeInvalid: true
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});
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return pdf.output('datauristring');
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}
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function downloadPDF() {
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dummySVGContainer.innerHTML = svg;
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var textElements = dummySVGContainer.getElementsByTagName('text'),
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svgElementStyle = dummySVGContainer.getElementsByTagName('svg')[0].style;
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// Workaround for the text styling. Making sure it does pick up the root element
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each(textElements, function(el) {
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each(['font-family', 'font-size'], function(property) {
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if (!el.style[property] && svgElementStyle[property]) {
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el.style[property] = svgElementStyle[property];
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}
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});
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el.style['font-family'] = el.style['font-family'] && el.style['font-family'].split(' ').splice(-1);
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});
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var svgData = svgToPdf(dummySVGContainer.firstChild, 0);
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Highcharts.downloadURL(svgData, filename);
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if (successCallback) {
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successCallback();
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}
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}
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// Initiate download depending on file type
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if (imageType === 'image/svg+xml') {
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// SVG download. In this case, we want to use Microsoft specific Blob if available
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try {
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if (nav.msSaveOrOpenBlob) {
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blob = new MSBlobBuilder();
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blob.append(svg);
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svgurl = blob.getBlob('image/svg+xml');
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} else {
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svgurl = Highcharts.svgToDataUrl(svg);
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}
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Highcharts.downloadURL(svgurl, filename);
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if (successCallback) {
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successCallback();
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}
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} catch (e) {
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failCallback();
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}
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} else if (imageType === 'application/pdf') {
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if (win.jsPDF && win.svgElementToPdf) {
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downloadPDF();
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} else {
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// Must load pdf libraries first
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objectURLRevoke = true; // Don't destroy the object URL yet since we are doing things asynchronously. A cleaner solution would be nice, but this will do for now.
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getScript(libURL + 'jspdf.js', function() {
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getScript(libURL + 'rgbcolor.js', function() {
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getScript(libURL + 'svg2pdf.js', function() {
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downloadPDF();
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});
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});
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});
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}
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} else {
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// PNG/JPEG download - create bitmap from SVG
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svgurl = Highcharts.svgToDataUrl(svg);
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finallyHandler = function() {
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try {
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domurl.revokeObjectURL(svgurl);
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} catch (e) {
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// Ignore
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}
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};
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// First, try to get PNG by rendering on canvas
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Highcharts.imageToDataUrl(svgurl, imageType, { /* args */ }, scale, function(imageURL) {
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// Success
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try {
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Highcharts.downloadURL(imageURL, filename);
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if (successCallback) {
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successCallback();
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}
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} catch (e) {
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failCallback();
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}
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}, function() {
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// Failed due to tainted canvas
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// Create new and untainted canvas
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var canvas = doc.createElement('canvas'),
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ctx = canvas.getContext('2d'),
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imageWidth = svg.match(/^<svg[^>]*width\s*=\s*\"?(\d+)\"?[^>]*>/)[1] * scale,
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imageHeight = svg.match(/^<svg[^>]*height\s*=\s*\"?(\d+)\"?[^>]*>/)[1] * scale,
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downloadWithCanVG = function() {
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ctx.drawSvg(svg, 0, 0, imageWidth, imageHeight);
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try {
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Highcharts.downloadURL(nav.msSaveOrOpenBlob ? canvas.msToBlob() : canvas.toDataURL(imageType), filename);
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if (successCallback) {
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successCallback();
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}
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} catch (e) {
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failCallback();
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} finally {
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finallyHandler();
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}
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};
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canvas.width = imageWidth;
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canvas.height = imageHeight;
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if (win.canvg) {
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// Use preloaded canvg
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downloadWithCanVG();
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} else {
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// Must load canVG first
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objectURLRevoke = true; // Don't destroy the object URL yet since we are doing things asynchronously. A cleaner solution would be nice, but this will do for now.
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getScript(libURL + 'rgbcolor.js', function() { // Get RGBColor.js first
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getScript(libURL + 'canvg.js', function() {
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downloadWithCanVG();
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});
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});
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}
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},
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// No canvas support
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failCallback,
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// Failed to load image
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failCallback,
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// Finally
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function() {
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if (objectURLRevoke) {
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finallyHandler();
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}
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});
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}
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};
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// Get SVG of chart prepared for client side export. This converts embedded images in the SVG to data URIs.
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// The options and chartOptions arguments are passed to the getSVGForExport function.
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Highcharts.Chart.prototype.getSVGForLocalExport = function(options, chartOptions, failCallback, successCallback) {
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var chart = this,
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images,
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imagesEmbedded = 0,
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chartCopyContainer,
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el,
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i,
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l,
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// Success handler, we converted image to base64!
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embeddedSuccess = function(imageURL, imageType, callbackArgs) {
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++imagesEmbedded;
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// Change image href in chart copy
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callbackArgs.imageElement.setAttributeNS('http://www.w3.org/1999/xlink', 'href', imageURL);
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// When done with last image we have our SVG
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if (imagesEmbedded === images.length) {
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successCallback(chart.sanitizeSVG(chartCopyContainer.innerHTML));
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}
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};
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// Hook into getSVG to get a copy of the chart copy's container
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Highcharts.wrap(Highcharts.Chart.prototype, 'getChartHTML', function(proceed) {
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chartCopyContainer = this.container.cloneNode(true);
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return proceed.apply(this, Array.prototype.slice.call(arguments, 1));
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});
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// Trigger hook to get chart copy
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chart.getSVGForExport(options, chartOptions);
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images = chartCopyContainer.getElementsByTagName('image');
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try {
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// If there are no images to embed, the SVG is okay now.
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if (!images.length) {
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successCallback(chart.sanitizeSVG(chartCopyContainer.innerHTML)); // Use SVG of chart copy
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return;
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}
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// Go through the images we want to embed
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for (i = 0, l = images.length; i < l; ++i) {
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el = images[i];
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Highcharts.imageToDataUrl(el.getAttributeNS('http://www.w3.org/1999/xlink', 'href'), 'image/png', {
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imageElement: el
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}, options.scale,
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embeddedSuccess,
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// Tainted canvas
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failCallback,
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// No canvas support
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failCallback,
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// Failed to load source
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failCallback
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);
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}
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} catch (e) {
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failCallback();
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}
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};
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/**
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* Add a new method to the Chart object to perform a local download
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*/
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Highcharts.Chart.prototype.exportChartLocal = function(exportingOptions, chartOptions) {
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var chart = this,
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options = Highcharts.merge(chart.options.exporting, exportingOptions),
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fallbackToExportServer = function() {
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if (options.fallbackToExportServer === false) {
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if (options.error) {
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options.error();
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} else {
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throw 'Fallback to export server disabled';
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}
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} else {
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chart.exportChart(options);
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}
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},
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svgSuccess = function(svg) {
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Highcharts.downloadSVGLocal(svg, options, fallbackToExportServer);
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};
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// If we have embedded images and are exporting to JPEG/PNG, Microsoft browsers won't handle it, so fall back
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if ((isMSBrowser && options.imageType !== 'image/svg+xml' || options.imageType !== 'application/pdf') && chart.container.getElementsByTagName('image').length) {
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fallbackToExportServer();
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return;
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}
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chart.getSVGForLocalExport(options, chartOptions, fallbackToExportServer, svgSuccess);
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};
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// Extend the default options to use the local exporter logic
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merge(true, Highcharts.getOptions().exporting, {
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libURL: 'http://code.highcharts.com/5.0.2/lib/',
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buttons: {
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contextButton: {
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menuItems: [{
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textKey: 'printChart',
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onclick: function() {
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this.print();
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}
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}, {
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separator: true
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}, {
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textKey: 'downloadPNG',
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onclick: function() {
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this.exportChartLocal();
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}
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}, {
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textKey: 'downloadJPEG',
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onclick: function() {
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this.exportChartLocal({
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type: 'image/jpeg'
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});
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}
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}, {
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textKey: 'downloadSVG',
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onclick: function() {
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this.exportChartLocal({
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type: 'image/svg+xml'
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});
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}
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}, {
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textKey: 'downloadPDF',
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onclick: function() {
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this.exportChartLocal({
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type: 'application/pdf'
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});
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}
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}]
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}
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}
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});
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}(Highcharts));
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}));
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