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<!DOCTYPE html>
<html id="top">
<meta charset="utf-8">
<title>View timeline current-time with vertical-rl writing mode</title>
<link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#viewtimeline-interface">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="/scroll-animations/scroll-timelines/testcommon.js"></script>
<script src="/scroll-animations/view-timelines/testcommon.js"></script>
<style>
#container {
writing-mode: vertical-rl;
overflow-x: scroll;
height: 200px;
width: 200px;
}
.spacer {
width: 800px;
}
#target {
background-color: green;
height: 100px;
width: 200px;
}
</style>
<body>
<div id="container">
<div id="leading-space" class="spacer"></div>
<div id="target"></div>
<div id="trailing-space" class="spacer"></div>
</div>
</body>
<script type="text/javascript">
promise_test(async t => {
container.scrollLeft = 0;
await waitForNextFrame();
const anim = CreateViewTimelineOpacityAnimation(t, target, {axis: 'block'});
const timeline = anim.timeline;
await anim.ready;
// Initially before start-offset and animation effect is in the before
// phase.
assert_percents_equal(timeline.currentTime, -150,
"Timeline's currentTime at container start boundary");
assert_percents_equal(anim.currentTime, -150,
"Animation's currentTime at container start boundary");
assert_equals(getComputedStyle(target).opacity, "1",
'Effect is inactive in the before phase');
// Advance to the start offset, which triggers entry to the active phase.
container.scrollLeft = -600;
await waitForNextFrame();
assert_percents_equal(timeline.currentTime, 0,
"Timeline's current time at start offset");
assert_percents_equal(anim.currentTime, 0,
"Animation's current time at start offset");
assert_equals(getComputedStyle(target).opacity, '0.3',
'Effect at the start of the active phase');
// Advance to the midpoint of the animation.
container.scrollLeft = -800;
await waitForNextFrame();
assert_percents_equal(timeline.currentTime, 50,
"Timeline's currentTime at midpoint");
assert_percents_equal(anim.currentTime, 50,
"Animation's currentTime at midpoint");
assert_equals(getComputedStyle(target).opacity,'0.5',
'Effect at the midpoint of the active range');
// Advance to the end of the animation.
container.scrollLeft = -1000;
await waitForNextFrame();
assert_percents_equal(timeline.currentTime, 100,
"Timeline's currentTime at end offset");
assert_percents_equal(anim.currentTime, 100,
"Animation's currentTime at end offset");
assert_equals(getComputedStyle(target).opacity, '0.7',
'Effect is in the active phase at effect end time');
// Advance to the scroll limit.
container.scrollLeft = -1600;
await waitForNextFrame();
assert_percents_equal(timeline.currentTime, 250,
"Timeline's currentTime at scroll limit");
// Hold time set when the animation finishes, which clamps the value of
// the animation's currentTime.
assert_percents_equal(anim.currentTime, 100,
"Animation's currentTime at scroll limit");
// In the after phase, so the effect should not be applied.
assert_equals(getComputedStyle(target).opacity, '1',
'After phase at scroll limit');
}, 'View timeline with container having vertical-rl layout' );
</script>
</html>
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