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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1277814
+-->
+<head>
+ <meta charset="utf-8">
+ <title>Test for Bug 1277814</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <script type="application/javascript" src="/tests/SimpleTest/paint_listener.js"></script>
+ <script type="application/javascript" src="apz_test_utils.js"></script>
+ <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+ <script type="application/javascript">
+ function* test(testDriver) {
+ // Trigger the buggy scenario
+ var subframe = document.getElementById('bug1277814-div');
+ subframe.classList.add('a');
+
+ // The transform change is animated, so let's step through 1s of animation
+ var utils = SpecialPowers.getDOMWindowUtils(window);
+ for (var i = 0; i < 60; i++) {
+ utils.advanceTimeAndRefresh(16);
+ }
+ utils.restoreNormalRefresh();
+
+ // Wait for the layer tree with any updated dispatch-to-content region to
+ // get pushed over to the APZ
+ yield waitForAllPaints(function() {
+ flushApzRepaints(testDriver);
+ });
+
+ // Trigger layerization of the subframe by scrolling the wheel over it
+ yield moveMouseAndScrollWheelOver(subframe, 10, 10, testDriver);
+
+ // Give APZ the chance to compute a displayport, and content
+ // to render based on it.
+ yield waitForApzFlushedRepaints(testDriver);
+
+ // Examine the content-side APZ test data
+ var contentTestData = utils.getContentAPZTestData();
+
+ // Test that the scroll frame for the div 'bug1277814-div' appears in
+ // the APZ test data. The bug this test is for causes the displayport
+ // calculation for this scroll frame to go wrong, causing it not to
+ // become layerized.
+ contentTestData = convertTestData(contentTestData);
+ var foundIt = false;
+ for (var seqNo in contentTestData.paints) {
+ var paint = contentTestData.paints[seqNo];
+ for (var scrollId in paint) {
+ var scrollFrame = paint[scrollId];
+ if ('contentDescription' in scrollFrame &&
+ scrollFrame['contentDescription'].includes('bug1277814-div')) {
+ foundIt = true;
+ }
+ }
+ }
+ SimpleTest.ok(foundIt, "expected to find APZ test data for bug1277814-div");
+ }
+
+ if (isApzEnabled()) {
+ SimpleTest.waitForExplicitFinish();
+
+ pushPrefs([["apz.test.logging_enabled", true]])
+ .then(waitUntilApzStable)
+ .then(runContinuation(test))
+ .then(SimpleTest.finish);
+ }
+ </script>
+ <style>
+ #bug1277814-div
+ {
+ position: absolute;
+ left: 0;
+ top: 0;
+ padding: .5em;
+ overflow: auto;
+ color: white;
+ background: green;
+ max-width: 30em;
+ max-height: 6em;
+ visibility: hidden;
+ transform: scaleY(0);
+ transition: transform .15s ease-out, visibility 0s ease .15s;
+ }
+ #bug1277814-div.a
+ {
+ visibility: visible;
+ transform: scaleY(1);
+ transition: transform .15s ease-out;
+ }
+ </style>
+</head>
+<body>
+ <!-- Use a unique id because we'll be checking for it in the content
+ description logged in the APZ test data -->
+ <div id="bug1277814-div">
+ CoolCmd<br>CoolCmd<br>CoolCmd<br>CoolCmd<br>
+ CoolCmd<br>CoolCmd<br>CoolCmd<br>CoolCmd<br>
+ CoolCmd<br>CoolCmd<br>CoolCmd<br>CoolCmd<br>
+ CoolCmd<br>CoolCmd<br>CoolCmd<br>CoolCmd<br>
+ CoolCmd<br>CoolCmd<br>CoolCmd<br>CoolCmd<br>
+ <button>click me</button>
+</body>
+</html>