svgedit/editor/extensions/imagelib/index.js

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