52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
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/* eslint-disable no-var */
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/* globals $ */
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$('a').click(function () {
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'use strict';
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var metaStr;
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var href = this.href;
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var target = window.parent;
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// Convert Non-SVG images to data URL first
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// (this could also have been done server-side by the library)
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if (this.href.indexOf('.svg') === -1) {
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metaStr = JSON.stringify({
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name: $(this).text(),
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id: href
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});
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target.postMessage(metaStr, '*');
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var img = new Image();
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img.onload = function () {
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var canvas = document.createElement('canvas');
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canvas.width = this.width;
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canvas.height = this.height;
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// load the raster image into the canvas
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canvas.getContext('2d').drawImage(this, 0, 0);
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// retrieve the data: URL
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var dataurl;
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try {
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dataurl = canvas.toDataURL();
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} catch (err) {
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// This fails in Firefox with file:// URLs :(
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alert('Data URL conversion failed: ' + err);
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dataurl = '';
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}
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target.postMessage('|' + href + '|' + dataurl, '*');
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};
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img.src = href;
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} else {
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// Send metadata (also indicates file is about to be sent)
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metaStr = JSON.stringify({
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name: $(this).text(),
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id: href
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});
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target.postMessage(metaStr, '*');
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// Do ajax request for image's href value
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$.get(href, function (data) {
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data = '|' + href + '|' + data;
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// This is where the magic happens!
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target.postMessage(data, '*');
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}, 'html'); // 'html' is necessary to keep returned data as a string
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}
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return false;
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});
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