1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/tests/chrome/test_transformed_scrolling_repaints.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,60 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test that scaled elements with scrolled contents don't repaint unnecessarily when we scroll inside them</title>
1.8 + <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
1.9 + <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/paint_listener.js"></script>
1.10 + <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
1.11 +</head>
1.12 +<!-- Need a timeout here to allow paint unsuppression before we start the test -->
1.13 +<body onload="setTimeout(startTest,0)">
1.14 +<div id="t" style="-moz-transform: scale(1.2, 1.2); -moz-transform-origin:top left; width:200px; height:100px; background:yellow; overflow:hidden">
1.15 + <div style="height:40px;">Hello</div>
1.16 + <div id="e" style="height:30px; background:lime">Kitty</div>
1.17 + <div style="height:300px; background:yellow">Kitty</div>
1.18 +</div>
1.19 +<pre id="test">
1.20 +<script type="application/javascript">
1.21 +SimpleTest.waitForExplicitFinish();
1.22 +
1.23 +var t = document.getElementById("t");
1.24 +var e = document.getElementById("e");
1.25 +var utils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor).
1.26 + getInterface(Components.interfaces.nsIDOMWindowUtils);
1.27 +const isLinux = navigator.platform.indexOf("Linux") >= 0;
1.28 +const is64 = navigator.platform.indexOf("x86_64") >= 0;
1.29 +var winLowerThanVista = navigator.platform.indexOf("Win") == 0;
1.30 +if (winLowerThanVista) {
1.31 + var version = Components.classes["@mozilla.org/system-info;1"]
1.32 + .getService(Components.interfaces.nsIPropertyBag2)
1.33 + .getProperty("version");
1.34 + winLowerThanVista = parseFloat(version) < 6.0;
1.35 +}
1.36 +
1.37 +function startTest() {
1.38 + // Do a couple of scrolls to ensure we've triggered activity heuristics.
1.39 + waitForAllPaintsFlushed(function () {
1.40 + t.scrollTop = 5;
1.41 + waitForAllPaintsFlushed(function () {
1.42 + t.scrollTop = 10;
1.43 + waitForAllPaintsFlushed(function () {
1.44 + // Clear paint state now and scroll again.
1.45 + utils.checkAndClearPaintedState(e);
1.46 + t.scrollTop = 15;
1.47 + waitForAllPaintsFlushed(function () {
1.48 + var painted = utils.checkAndClearPaintedState(e);
1.49 + if ((isLinux && !is64) || winLowerThanVista) {
1.50 + todo(false, "Fully-visible scrolled element should not have been painted (random on Linux-32)");
1.51 + } else {
1.52 + is(painted, false, "Fully-visible scrolled element should not have been painted");
1.53 + }
1.54 + SimpleTest.finish();
1.55 + });
1.56 + });
1.57 + });
1.58 + });
1.59 +}
1.60 +</script>
1.61 +</pre>
1.62 +</body>
1.63 +</html>
