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comparison: layout/base/tests/chrome/test_fixed_bg_scrolling_repaints.html
layout/base/tests/chrome/test_fixed_bg_scrolling_repaints.html
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| -1:000000000000 | 0:f93913565928 |
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| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test that we don't get unnecessary repaints with fixed backgrounds</title> | |
| 5 <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script> | |
| 6 <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/paint_listener.js"></script> | |
| 7 <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/> | |
| 8 </head> | |
| 9 <!-- Need a timeout here to allow paint unsuppression before we start the test --> | |
| 10 <body onload="setTimeout(startTest,0)" style="background: url(blue-32x32.png) fixed"> | |
| 11 <div style="height: 2048px"></div> | |
| 12 <pre id="test"> | |
| 13 <script type="application/javascript"> | |
| 14 SimpleTest.waitForExplicitFinish(); | |
| 15 | |
| 16 var utils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor). | |
| 17 getInterface(Components.interfaces.nsIDOMWindowUtils); | |
| 18 | |
| 19 function startTest() { | |
| 20 // Do a scroll to ensure we trigger activity heuristics. | |
| 21 waitForAllPaintsFlushed(function () { | |
| 22 // Clear paint state and scroll down | |
| 23 utils.checkAndClearPaintedState(document.body); | |
| 24 document.documentElement.scrollTop = 100; | |
| 25 waitForAllPaintsFlushed(function () { | |
| 26 // Make sure the body didn't paint | |
| 27 var painted = utils.checkAndClearPaintedState(document.body); | |
| 28 is(painted, false, "Fixed background should not have been painted when scrolled"); | |
| 29 SimpleTest.finish(); | |
| 30 }); | |
| 31 }); | |
| 32 } | |
| 33 </script> | |
| 34 </pre> | |
| 35 </body> | |
| 36 </html> |
