Commit aa43f886 authored by Robert O'Callahan's avatar Robert O'Callahan
Browse files

Bug 681192. Part 6: Test that various scrolling operations inside scaled... 

Bug 681192. Part 6: Test that various scrolling operations inside scaled transforms don't trigger unnecessary repainting. r=matspal

--HG--
extra : rebase_source : a72afaa7ebb5e9b59cf574cd973f966eee5c7f45
parent 1a9ecd54

layout/base/tests/chrome/Makefile.in

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@@ -74,6 +74,7 @@ _CHROME_FILES = \ 
	     printpreview_bug396024_helper.xul \

	test_printpreview_bug482976.xul \

	     printpreview_bug482976_helper.xul \

	test_transformed_scrolling_repaints.html \

    $(NULL)



libs:: $(_CHROME_FILES)

layout/base/tests/chrome/test_transformed_scrolling_repaints.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test that scaled elements with scrolled contents don't repaint unnecessarily when we scroll inside them</title>

  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <script type="text/javascript" src="paint_listener.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>

</head>

<!-- Need a timeout here to allow paint unsuppression before we start the test -->

<body onload="setTimeout(startTest,0)">

<div id="t" style="-moz-transform: scale(1.2, 1.2); -moz-transform-origin:top left; width:200px; height:100px; background:yellow; overflow:hidden">

  <div style="height:40px;">Hello</div>

  <div id="e" style="height:30px; background:lime">Kitty</div>

  <div style="height:300px; background:yellow">Kitty</div>

</div>

<pre id="test">

<script type="application/javascript">

SimpleTest.waitForExplicitFinish();



var t = document.getElementById("t");

var e = document.getElementById("e");

var utils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor).

               getInterface(Components.interfaces.nsIDOMWindowUtils);



function startTest() {

  // Do a couple of scrolls to ensure we've triggered activity heuristics.

  waitForAllPaintsFlushed(function () {

    t.scrollTop = 5;

    waitForAllPaintsFlushed(function () {

      t.scrollTop = 10;

      waitForAllPaintsFlushed(function () {

        // Clear paint state now and scroll again.

        utils.checkAndClearPaintedState(e);

        t.scrollTop = 33;

        waitForAllPaintsFlushed(function () {

          var painted = utils.checkAndClearPaintedState(e);

          is(painted, false, "Fully-visible scrolled element should not have been painted");

          SimpleTest.finish();

        });

      });

    });

  });

}

</script>

</pre>

</body>

</html>