| 1 | <!doctype html>
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| 2 | <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
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| 3 |
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| 4 |
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| 5 | <body>
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| 6 |
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| 7 | <h1>Select an image:</h1>
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| 8 | <a href="smiley.svg">smiley.svg</a>
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| 9 | <br>
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| 10 | <a href="../../images/logo.png">logo.png</a>
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| 11 | </body>
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| 12 |
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| 13 | <script>
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| 14 |
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| 15 | $('a').click(function() {
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| 16 | var href = this.href;
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| 17 | var target = window.parent;
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| 18 | // Convert Non-SVG images to data URL first
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| 19 | // (this could also have been done server-side by the library)
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| 20 | if(this.href.indexOf('.svg') === -1) {
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| 21 |
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| 22 | var meta_str = JSON.stringify({
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| 23 | name: $(this).text(),
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| 24 | id: href
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| 25 | });
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| 26 | target.postMessage(meta_str, "*");
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| 27 |
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| 28 | var img = new Image();
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| 29 | img.onload = function() {
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| 30 | var canvas = document.createElement("canvas");
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| 31 | canvas.width = this.width;
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| 32 | canvas.height = this.height;
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| 33 | // load the raster image into the canvas
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| 34 | canvas.getContext("2d").drawImage(this,0,0);
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| 35 | // retrieve the data: URL
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| 36 | try {
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| 37 | var dataurl = canvas.toDataURL();
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| 38 | } catch(err) {
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| 39 | // This fails in Firefox with file:// URLs :(
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| 40 | alert("Data URL conversion failed: " + err);
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| 41 | var dataurl = "";
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| 42 | }
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| 43 | target.postMessage('|' + href + '|' + dataurl, "*");
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| 44 | }
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| 45 | img.src = href;
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| 46 | } else {
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| 47 | // Send metadata (also indicates file is about to be sent)
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| 48 | var meta_str = JSON.stringify({
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| 49 | name: $(this).text(),
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| 50 | id: href
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| 51 | });
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| 52 | target.postMessage(meta_str, "*");
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| 53 | // Do ajax request for image's href value
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| 54 | $.get(href, function(data) {
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| 55 | data = '|' + href + '|' + data;
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| 56 | // This is where the magic happens!
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| 57 | target.postMessage(data, "*");
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| 58 |
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| 59 | }, 'html'); // 'html' is necessary to keep returned data as a string
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| 60 | }
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| 61 | return false;
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| 62 | });
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| 63 |
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| 64 | </script>
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