<!doctype html>
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<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
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<body>
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<h1>Select an image:</h1>
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<a href="smiley.svg">smiley.svg</a>
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<br>
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<a href="../../images/logo.png">logo.png</a>
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</body>
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<script>
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$('a').click(function() {
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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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var meta_str = 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(meta_str, "*");
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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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try {
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var 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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var 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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var meta_str = JSON.stringify({
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name: $(this).text(),
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id: href
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});
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target.postMessage(meta_str, "*");
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// Do ajax request for image's href value
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$.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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</script>
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