forked from qwerty/tupali
93 lines
3.0 KiB
JavaScript
93 lines
3.0 KiB
JavaScript
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/* *
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*
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* (c) 2015-2020 Oystein Moseng
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*
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* License: www.highcharts.com/license
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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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* Mixin for downloading content in the browser
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*
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* */
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'use strict';
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import Highcharts from '../parts/Globals.js';
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var win = Highcharts.win, nav = win.navigator, doc = win.document, domurl = win.URL || win.webkitURL || win, isEdgeBrowser = /Edge\/\d+/.test(nav.userAgent);
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/**
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* Convert base64 dataURL to Blob if supported, otherwise returns undefined.
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* @private
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* @function Highcharts.dataURLtoBlob
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* @param {string} dataURL
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* URL to convert
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* @return {string|undefined}
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* Blob
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*/
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Highcharts.dataURLtoBlob = function (dataURL) {
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var parts = dataURL.match(/data:([^;]*)(;base64)?,([0-9A-Za-z+/]+)/);
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if (parts &&
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parts.length > 3 &&
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win.atob &&
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win.ArrayBuffer &&
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win.Uint8Array &&
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win.Blob &&
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domurl.createObjectURL) {
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// Try to convert data URL to Blob
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var binStr = win.atob(parts[3]), buf = new win.ArrayBuffer(binStr.length), binary = new win.Uint8Array(buf), blob;
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for (var i = 0; i < binary.length; ++i) {
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binary[i] = binStr.charCodeAt(i);
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}
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blob = new win.Blob([binary], { 'type': parts[1] });
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return domurl.createObjectURL(blob);
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}
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};
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/**
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* Download a data URL in the browser. Can also take a blob as first param.
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*
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* @private
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* @function Highcharts.downloadURL
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* @param {string|global.URL} dataURL
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* The dataURL/Blob to download
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* @param {string} filename
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* The name of the resulting file (w/extension)
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* @return {void}
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*/
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Highcharts.downloadURL = function (dataURL, filename) {
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var a = doc.createElement('a'), windowRef;
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// IE specific blob implementation
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// Don't use for normal dataURLs
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if (typeof dataURL !== 'string' &&
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!(dataURL instanceof String) &&
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nav.msSaveOrOpenBlob) {
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nav.msSaveOrOpenBlob(dataURL, filename);
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return;
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}
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// Some browsers have limitations for data URL lengths. Try to convert to
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// Blob or fall back. Edge always needs that blob.
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if (isEdgeBrowser || dataURL.length > 2000000) {
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dataURL = Highcharts.dataURLtoBlob(dataURL);
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if (!dataURL) {
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throw new Error('Failed to convert to blob');
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}
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}
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// Try HTML5 download attr if supported
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if (typeof a.download !== 'undefined') {
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a.href = dataURL;
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a.download = filename; // HTML5 download attribute
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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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}
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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 (typeof windowRef === 'undefined' || windowRef === null) {
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throw new Error('Failed to open window');
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}
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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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