image/test/mochitest/test_drawDiscardedImage.html@ac0c01689b40 (annotated)
image/test/mochitest/test_drawDiscardedImage.html
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <!-- |
| michael@0 | 4 | https://bugzilla.mozilla.org/show_bug.cgi?id=731419 |
| michael@0 | 5 | --> |
| michael@0 | 6 | <head> |
| michael@0 | 7 | <title>Test for Bug 731419 - Draw an ostensibly discarded image to a canvas</title> |
| michael@0 | 8 | <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 9 | <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> |
| michael@0 | 10 | </head> |
| michael@0 | 11 | |
| michael@0 | 12 | <body> |
| michael@0 | 13 | |
| michael@0 | 14 | <!-- |
| michael@0 | 15 | Load an image in an iframe, then draw that image to a canvas. Then set the |
| michael@0 | 16 | iframe to display:none (after bug 731419, this causes the image's decoded |
| michael@0 | 17 | data to be discarded) and draw the image to a canvas again. We should draw |
| michael@0 | 18 | the same image data both times. |
| michael@0 | 19 | --> |
| michael@0 | 20 | |
| michael@0 | 21 | <script> |
| michael@0 | 22 | |
| michael@0 | 23 | SimpleTest.waitForExplicitFinish(); |
| michael@0 | 24 | |
| michael@0 | 25 | var data1; |
| michael@0 | 26 | |
| michael@0 | 27 | function drawImage() |
| michael@0 | 28 | { |
| michael@0 | 29 | var canvas = document.getElementById('canvas'); |
| michael@0 | 30 | var ctx = canvas.getContext('2d'); |
| michael@0 | 31 | var iframeDoc = document.getElementById('iframe').contentDocument; |
| michael@0 | 32 | |
| michael@0 | 33 | ctx.clearRect(0, 0, canvas.height, canvas.width); |
| michael@0 | 34 | ctx.drawImage(iframeDoc.getElementById('image'), 0, 0); |
| michael@0 | 35 | return canvas.toDataURL(); |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | function iframeLoad() |
| michael@0 | 39 | { |
| michael@0 | 40 | data1 = drawImage(); |
| michael@0 | 41 | document.getElementById('iframe').style.display = 'none'; |
| michael@0 | 42 | |
| michael@0 | 43 | // Spin the event loop a few times to give the image in the display:none |
| michael@0 | 44 | // iframe a chance to be discarded. |
| michael@0 | 45 | SimpleTest.executeSoon(function() { |
| michael@0 | 46 | SimpleTest.executeSoon(function() { |
| michael@0 | 47 | SimpleTest.executeSoon(function() { |
| michael@0 | 48 | step2(); |
| michael@0 | 49 | }); |
| michael@0 | 50 | }); |
| michael@0 | 51 | }); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | function step2() |
| michael@0 | 55 | { |
| michael@0 | 56 | is(drawImage(), data1, "Same image before and after iframe display:none"); |
| michael@0 | 57 | SimpleTest.finish(); |
| michael@0 | 58 | } |
| michael@0 | 59 | |
| michael@0 | 60 | </script> |
| michael@0 | 61 | |
| michael@0 | 62 | <canvas id='canvas'></canvas> |
| michael@0 | 63 | |
| michael@0 | 64 | <iframe id='iframe' onload='iframeLoad()' src='data:text/html,<img id="image" |
| michael@0 | 65 | src="data:image/png;base64, |
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| michael@0 | 82 | |
| michael@0 | 83 | </body> |
| michael@0 | 84 | </html> |
| michael@0 | 85 |
