layout/base/tests/chrome/test_fixed_bg_scrolling_repaints.html@6474c204b198 (annotated)
layout/base/tests/chrome/test_fixed_bg_scrolling_repaints.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <head> |
| michael@0 | 4 | <title>Test that we don't get unnecessary repaints with fixed backgrounds</title> |
| michael@0 | 5 | <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 6 | <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/paint_listener.js"></script> |
| michael@0 | 7 | <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/> |
| michael@0 | 8 | </head> |
| michael@0 | 9 | <!-- Need a timeout here to allow paint unsuppression before we start the test --> |
| michael@0 | 10 | <body onload="setTimeout(startTest,0)" style="background: url(blue-32x32.png) fixed"> |
| michael@0 | 11 | <div style="height: 2048px"></div> |
| michael@0 | 12 | <pre id="test"> |
| michael@0 | 13 | <script type="application/javascript"> |
| michael@0 | 14 | SimpleTest.waitForExplicitFinish(); |
| michael@0 | 15 | |
| michael@0 | 16 | var utils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor). |
| michael@0 | 17 | getInterface(Components.interfaces.nsIDOMWindowUtils); |
| michael@0 | 18 | |
| michael@0 | 19 | function startTest() { |
| michael@0 | 20 | // Do a scroll to ensure we trigger activity heuristics. |
| michael@0 | 21 | waitForAllPaintsFlushed(function () { |
| michael@0 | 22 | // Clear paint state and scroll down |
| michael@0 | 23 | utils.checkAndClearPaintedState(document.body); |
| michael@0 | 24 | document.documentElement.scrollTop = 100; |
| michael@0 | 25 | waitForAllPaintsFlushed(function () { |
| michael@0 | 26 | // Make sure the body didn't paint |
| michael@0 | 27 | var painted = utils.checkAndClearPaintedState(document.body); |
| michael@0 | 28 | is(painted, false, "Fixed background should not have been painted when scrolled"); |
| michael@0 | 29 | SimpleTest.finish(); |
| michael@0 | 30 | }); |
| michael@0 | 31 | }); |
| michael@0 | 32 | } |
| michael@0 | 33 | </script> |
| michael@0 | 34 | </pre> |
| michael@0 | 35 | </body> |
| michael@0 | 36 | </html> |
