178 lines
6.3 KiB
HTML
178 lines
6.3 KiB
HTML
<!DOCTYPE html>
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<meta charset=utf-8>
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<title>Pausing an animation</title>
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<link rel="help"
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href="https://drafts.csswg.org/web-animations/#pausing-an-animation-section">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/web-animations/testcommon.js"></script>
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<script src="testcommon.js"></script>
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<style>
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.scroller {
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overflow: auto;
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height: 100px;
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width: 100px;
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will-change: transform;
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}
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.contents {
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height: 1000px;
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width: 100%;
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}
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</style>
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<body>
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<script>
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'use strict';
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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await animation.ready;
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const startTimeBeforePausing = animation.startTime;
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animation.pause();
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assert_percents_equal(animation.startTime, startTimeBeforePausing,
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'The start time does not change when pausing-pending');
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await animation.ready;
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assert_equals(animation.startTime, null,
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'The start time is unresolved when paused');
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}, 'Pausing clears the start time');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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const promise = animation.ready;
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animation.pause();
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const promiseResult = await promise;
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assert_equals(promiseResult, animation);
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assert_equals(animation.ready, promise);
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assert_false(animation.pending, 'No longer pause-pending');
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}, 'A pending ready promise should be resolved and not replaced when the'
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+ ' animation is paused');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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// Let animation start roughly half-way through
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animation.currentTime = CSSNumericValue.parse("50%");
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await animation.ready;
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// Go pause-pending and also set a pending playback rate
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animation.pause();
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animation.updatePlaybackRate(0.5);
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await animation.ready;
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// If the current time was updated using the new playback rate it will jump
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// back to 25% but if we correctly used the old playback rate the current time
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// will be > 50%.
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assert_percents_equal(animation.currentTime, 50);
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}, 'A pause-pending animation maintains the current time when applying a'
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+ ' pending playback rate');
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promise_test(async t => {
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// This test does not cover a specific step in the algorithm but serves as a
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// high-level sanity check that pausing does, in fact, freeze the current
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// time.
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const animation = createScrollLinkedAnimation(t);
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const scroller = animation.timeline.source;
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const maxScroll = scroller.scrollHeight - scroller.clientHeight;
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animation.play();
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await animation.ready;
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animation.pause();
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await animation.ready;
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const currentTimeAfterPausing = animation.currentTime;
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scroller.scrollTop = 0.2 * maxScroll;
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await waitForNextFrame();
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assert_percents_equal(animation.timeline.currentTime, 20,
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'Sanity check timeline time changed');
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assert_percents_equal(animation.currentTime, currentTimeAfterPausing,
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'Animation.currentTime is unchanged after pausing');
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}, 'The animation\'s current time remains fixed after pausing');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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animation.play();
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const originalReadyPromise = animation.ready;
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animation.cancel();
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assert_equals(animation.startTime, null);
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assert_equals(animation.currentTime, null);
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const readyPromise = animation.ready;
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assert_not_equals(originalReadyPromise, readyPromise,
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'Canceling an animation should create a new ready promise');
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animation.pause();
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assert_equals(animation.playState, 'paused',
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'Pausing a canceled animation should update the play state');
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assert_true(animation.pending, 'animation should be pause-pending');
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await animation.ready;
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assert_false(animation.pending,
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'animation should no longer be pause-pending');
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assert_equals(animation.startTime, null, 'start time should be unresolved');
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assert_percents_equal(animation.currentTime, 0,
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'current time should be set to zero');
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}, 'Pausing a canceled animation sets the current time');
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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const scroller = animation.timeline.source;
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// Make the scroll timeline inactive.
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scroller.style.overflow = 'visible';
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scroller.scrollTop;
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// Wait for new animation frame which allows the timeline to compute new
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// current time.
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await waitForNextFrame();
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assert_equals(animation.timeline.currentTime, null,
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'Sanity check the timeline is inactive.');
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// Pause the animation when the timeline is inactive.
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animation.pause();
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assert_equals(animation.currentTime, null,
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'The current time is null when the timeline is inactive.');
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assert_equals(animation.startTime, null,
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'The start time is null in Pending state.');
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await waitForNextFrame();
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assert_true(animation.pending,
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'Animation has pause pending task while the timeline is inactive.');
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assert_equals(animation.playState, 'paused',
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`State is 'paused' in Pending state.`);
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}, `Pause pending task doesn't run when the timeline is inactive.`);
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promise_test(async t => {
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const animation = createScrollLinkedAnimation(t);
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const scroller = animation.timeline.source;
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const maxScroll = scroller.scrollHeight - scroller.clientHeight;
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scroller.scrollTop = 0.2 * maxScroll;
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// Make the scroll timeline inactive.
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scroller.style.overflow = 'visible';
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scroller.scrollTop;
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// Wait for new animation frame which allows the timeline to compute new
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// current time.
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await waitForNextFrame();
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assert_equals(animation.timeline.currentTime, null,
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'Sanity check the timeline is inactive.');
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// Play the animation when the timeline is inactive.
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animation.pause();
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// Make the scroll timeline active.
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scroller.style.overflow = 'auto';
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await animation.ready;
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// Ready promise is resolved as a result of the timeline becoming active.
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assert_percents_equal(animation.currentTime, 20,
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'Animation current time is resolved when the animation is ready.');
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assert_equals(animation.startTime, null,
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'Animation start time is unresolved when the animation is ready.');
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}, 'Animation start and current times are correct if scroll timeline is ' +
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'activated after animation.pause call.');
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</script>
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</body>
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