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no-compositing-when-full-screen-is-present.html
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no-compositing-when-full-screen-is-present.html
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<!DOCTYPE html>
<html>
<body>
<div id="host">full screen content</div>
<div style="position: fixed; top: 100px; left: 100px;">foobar</div>
<div style="will-change: transform;">foobar</div>
<pre id=layers></pre>
<button>Enter fullscreen</button>
<script src="../resources/js-test.js"></script>
<script>
description("Test that only elements in fullscreen subtree and the associated backdrop get layer backed.");
function goFullscreen() {
host.webkitRequestFullscreen();
setTimeout(function () {
if (done)
return;
testFailed('webkitfullscreenchange was not fired');
finishJSTest();
}, 2000);
}
let done = false;
function finalizeTest() {
if (done)
return;
done = true;
if (testRunner)
testRunner.dumpAsText();
if (window.internals)
layers.innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_BACKING_STORE_ATTACHED);
finishJSTest();
}
host.addEventListener('webkitfullscreenchange', finalizeTest);
let button = document.querySelector('button');
button.onclick = goFullscreen;
if (window.eventSender) {
jsTestIsAsync = true;
eventSender.mouseMoveTo(button.offsetLeft + 5, button.offsetTop + 5);
eventSender.mouseDown();
eventSender.mouseUp();
}
</script>
</body>
</html>