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<!DOCTYPE html>
<html id="top">
<meta charset="utf-8">
<title>View timeline delay</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 {
border: 10px solid lightgray;
overflow-x: scroll;
height: 200px;
width: 200px;
}
#content {
display: flex;
flex-flow: row nowrap;
justify-content: flex-start;
width: 1800px;
margin: 0;
}
.spacer {
width: 800px;
display: inline-block;
}
#target {
background-color: green;
height: 100px;
width: 100px;
display: inline-block;
}
</style>
<body>
<div id="container">
<div id="content">
<div class="spacer"></div>
<div id="target"></div>
<div class="spacer"></div>
</div>
</div>
</body>
<script type="text/javascript">
const MAX_SCROLL = 1600;
promise_test(async t => {
// Points of interest along view timeline:
// 600 px cover start, entry start
// 700 px contain start, entry end
// 800 px contain end, exit start
// 900 px cover end, exit end
const anim =
CreateViewTimelineOpacityAnimation(t, target,
{
timeline: { axis: 'inline' },
animation: { fill: 'both' }
});
let timeline = anim.timeline;
container.scrollLeft = 600;
await waitForNextFrame();
assert_percents_approx_equal(timeline.getCurrentTime('cover'), 0,
MAX_SCROLL, 'Scroll aligned with cover start');
assert_percents_approx_equal(timeline.getCurrentTime('entry'), 0,
MAX_SCROLL, 'Scroll aligned with entry start');
assert_percents_approx_equal(timeline.getCurrentTime(), 0,
MAX_SCROLL,
'Scroll aligned with timeline start offset');
container.scrollLeft = 650;
await waitForNextFrame();
assert_percents_approx_equal(timeline.getCurrentTime('entry'), 50,
MAX_SCROLL, 'Scroll at entry midpoint');
container.scrollLeft = 700;
await waitForNextFrame();
assert_percents_approx_equal(timeline.getCurrentTime('entry'), 100,
MAX_SCROLL, 'Scroll at entry end');
assert_percents_approx_equal(timeline.getCurrentTime('contain'), 0,
MAX_SCROLL, 'Scroll at contain start');
container.scrollLeft = 750;
await waitForNextFrame();
assert_percents_approx_equal(timeline.getCurrentTime('contain'), 50,
MAX_SCROLL, 'Scroll at contain midpoint');
assert_percents_approx_equal(timeline.getCurrentTime(), 50,
MAX_SCROLL, 'Scroll at timeline midpoint');
container.scrollLeft = 800;
await waitForNextFrame();
assert_percents_approx_equal(timeline.getCurrentTime('exit'), 0,
MAX_SCROLL, 'Scroll at exit start');
assert_percents_approx_equal(timeline.getCurrentTime('contain'), 100,
MAX_SCROLL, 'Scroll at contain end');
container.scrollLeft = 850;
await waitForNextFrame();
assert_percents_approx_equal(timeline.getCurrentTime('exit'), 50,
MAX_SCROLL, 'Scroll at exit midpoint');
container.scrollLeft = 900;
await waitForNextFrame();
assert_percents_approx_equal(timeline.getCurrentTime('exit'), 100,
MAX_SCROLL, 'Scroll at exit end');
assert_percents_approx_equal(timeline.getCurrentTime('cover'), 100,
MAX_SCROLL, 'Scroll at cover end');
assert_percents_approx_equal(timeline.getCurrentTime(), 100,
MAX_SCROLL, 'Scroll at end of timeline');
assert_equals(timeline.getCurrentTime('gibberish'), null,
'No current time for unknown named range');
// Add insets to force the start and end offsets to align. This forces
// the timeline to become inactive.
// start_offset = target_offset - viewport_size + end_side_inset
// = 600 + end_side_inset
// end_offset = target_offset + target_size - start_side_inset
// = 900 - start_side_inset
// Equating start_offset and end_offset:
// end_side_inset = 300 - start_side_inset;
timeline =
new ViewTimeline ({
subject: target,
axis: 'inline',
inset: [ CSS.px(150), CSS.px(150) ]
});
anim.timeline = timeline;
await waitForNextFrame();
assert_equals(timeline.currentTime, null,
'Current time is null when scroll-range is zero');
assert_equals(timeline.getCurrentTime(), null,
'getCurrentTime with an inactive timeline.');
assert_equals(timeline.getCurrentTime('contain'), null,
'getCurrentTime on a ranged name with an inactive timeline.');
}, 'View timeline current time for named range');
</script>
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