зеркало из https://github.com/mozilla/gecko-dev.git
89 строки
2.5 KiB
HTML
89 строки
2.5 KiB
HTML
<!doctype html>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=1292001
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-->
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<head>
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<meta charset=utf-8>
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<title>Test for bug 1292001</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script src="/tests/SimpleTest/paint_listener.js"></script>
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<script src="animation_utils.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
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<style>
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#target {
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height: 100px;
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width: 100px;
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background: green;
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transition: transform 100s linear;
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}
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</style>
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</head>
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<body>
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<div id="target"></div>
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<script>
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'use strict';
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SimpleTest.waitForExplicitFinish();
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const OMTAPrefKey = 'layers.offmainthreadcomposition.async-animations';
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const omtaEnabled =
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SpecialPowers.DOMWindowUtils.layerManagerRemote &&
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SpecialPowers.getBoolPref(OMTAPrefKey);
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window.addEventListener('load', async function() {
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if (!omtaEnabled) {
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ok(true, 'Skipping the test since OMTA is disabled');
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SimpleTest.finish();
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return;
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}
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const div = document.getElementById('target');
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// Start first transition
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div.style.transform = 'translateX(300px)';
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const firstTransition = div.getAnimations()[0];
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// But then change its keyframes to something completely different.
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firstTransition.effect.setKeyframes({ 'opacity': ['0', '1'] });
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// Wait for the transition to start running on the main thread and
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// compositor.
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await firstTransition.ready;
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await waitForPaints();
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await new Promise(resolve => requestAnimationFrame(resolve));
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// Start second transition
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div.style.transform = 'translateX(600px)';
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const secondTransition = div.getAnimations()[0];
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const previousKeyframeValue = secondTransition.effect.getKeyframes()[0]
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.transform;
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// Tie up main thread for 300ms. In the meantime, the first transition
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// will continue running on the compositor. If we don't update the start
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// point of the second transition, it will appear to jump when it starts.
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const startTime = performance.now();
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while (performance.now() - startTime < 300);
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// Ensure that our paint process has been done.
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//
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// (See explanation in test_transitions_replacement_on_busy_frame.html for
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// why we don't use requestAnimationFrame here.)
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await waitForPaints();
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// Now check that the keyframes are NOT updated.
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is(
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secondTransition.effect.getKeyframes()[0].transform,
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previousKeyframeValue,
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'Keyframe value of transition is NOT updated since the moment when ' +
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'it was generated'
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);
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SimpleTest.finish();
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});
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</script>
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</body>
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</html>
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