<!doctype html>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1167519
-->
<head>
<meta charset=utf-8>
<script type="application/javascript"
src="/tests/SimpleTest/paint_listener.js"></script>
<style>
#target {
height: 100px;
width: 100px;
background: green;
transition: transform 100s linear;
}
</style>
</head>
<body>
<div id="target"></div>
<script>
'use strict';
var ok = opener.ok.bind(opener);
var isnot = opener.isnot.bind(opener);
function finish() {
var o = opener;
self.close();
o.SimpleTest.finish();
}
var OMTAPrefKey = "layers.offmainthreadcomposition.async-animations";
var omtaEnabled = SpecialPowers.DOMWindowUtils.layerManagerRemote &&
opener.SpecialPowers.getBoolPref(OMTAPrefKey);
window.addEventListener("load", function() {
if (!omtaEnabled) {
ok(true, "Skipping the test since OMTA is disabled");
finish();
return;
}
var div = document.getElementById("target");
// Start first transition
div.style.transform = "translateX(300px)";
getComputedStyle(div);
// Wait for a paint to ensure that the first transition has started.
waitForAllPaints(function() {
var previousPropertyValue;
var previousKeyframeValue;
var anim;
requestAnimationFrame(function() {
// Start second transition
div.style.transform = "translateX(0px)";
getComputedStyle(div).transform;
anim = div.getAnimations()[0];
var properties = SpecialPowers.wrap(anim.effect).getProperties();
previousPropertyValue = properties[0].values[0].value;
previousKeyframeValue = anim.effect.getKeyframes()[0].transform;
});
requestAnimationFrame(function() {
// Tie up main thread for 300ms. In the meantime, the first transition
// will continue running on the compositor. If we don't update the start
// point of the second transition, it will appear to jump when it starts.
var startTime = performance.now();
while (performance.now() - startTime < 300);
// Ensure that our paint process has been done.
// Note that requestAnimationFrame is not suitable here since on Android
// there is a case where the paint process has not completed even when the
// requestAnimationFrame callback is run (and it is during the paint
// process that we update the transition start point).
waitForAllPaints(function() {
var properties = SpecialPowers.wrap(anim.effect).getProperties();
var currentPropertyValue = properties[0].values[0].value;
isnot(currentPropertyValue, previousPropertyValue,
"From value of transition is updated since the moment when " +
"it was generated");
isnot(anim.effect.getKeyframes()[0].transform, previousKeyframeValue,
"Keyframe value of transition is updated since the moment when " +
"it was generated");
finish();
});
});
});
});
</script>
</body>
</html>