| <!DOCTYPE html> |
| <html id="top"> |
| <meta charset="utf-8"> |
| <title>View timeline current-time</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-y: scroll; |
| height: 200px; |
| width: 200px; |
| } |
| .spacer { |
| height: 800px; |
| } |
| #target { |
| background-color: green; |
| height: 200px; |
| width: 100px; |
| } |
| </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.scrollTop = 0; |
| await waitForNextFrame(); |
| |
| const anim = CreateViewTimelineOpacityAnimation(t, target); |
| 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.scrollTop = 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.scrollTop = 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.scrollTop = 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.scrollTop = 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 start and end scroll offsets that do not align with ' + |
| 'the scroll boundaries' ); |
| |
| promise_test(async t => { |
| const leading = document.getElementById('leading-space'); |
| leading.style = 'display: none'; |
| t.add_cleanup(() => { |
| leading.style = null; |
| }); |
| |
| container.scrollTop = 0; |
| await waitForNextFrame(); |
| |
| const anim = CreateViewTimelineOpacityAnimation(t, target); |
| const timeline = anim.timeline; |
| await anim.ready; |
| |
| assert_percents_equal(timeline.currentTime, 50, |
| "Timeline's currentTime at container start boundary"); |
| assert_percents_equal(anim.currentTime, 50, |
| "Animation's currentTime at container start boundary"); |
| assert_equals(getComputedStyle(target).opacity, "0.5", |
| 'Effect enters active phase at container start boundary'); |
| |
| |
| // Advance to midpoint |
| container.scrollTop = 100; |
| await waitForNextFrame(); |
| assert_percents_equal(timeline.currentTime, 75, |
| "Timeline's current time at start offset"); |
| assert_percents_equal(anim.currentTime, 75, |
| "Animation's current time at start offset"); |
| assert_equals(getComputedStyle(target).opacity, '0.6', |
| 'Effect at the start of the active phase'); |
| |
| // Advance to end-offset |
| container.scrollTop = 200; |
| await waitForNextFrame(); |
| assert_percents_equal(timeline.currentTime, 100, |
| "Timeline's current time at start offset"); |
| assert_percents_equal(anim.currentTime, 100, |
| "Animation's current time at start offset"); |
| assert_equals(getComputedStyle(target).opacity, '0.7', |
| 'Effect at the start of the active phase'); |
| |
| // Advance to scroll limit. |
| container.scrollTop = 800; |
| await waitForNextFrame(); |
| assert_percents_equal(timeline.currentTime, 250, |
| "Timeline's current time at start offset"); |
| assert_percents_equal(anim.currentTime, 100, |
| "Animation's current time at start offset"); |
| assert_equals(getComputedStyle(target).opacity, '1', |
| 'Effect at the start of the active phase'); |
| |
| }, 'View timeline does not clamp starting scroll offset at 0'); |
| |
| promise_test(async t => { |
| const trailing = document.getElementById('trailing-space'); |
| trailing.style = 'display: none'; |
| t.add_cleanup(() => { |
| trailing.style = null; |
| }); |
| |
| container.scrollTop = 0; |
| await waitForNextFrame(); |
| |
| const anim = CreateViewTimelineOpacityAnimation(t, target); |
| const timeline = anim.timeline; |
| await anim.ready; |
| |
| // Initially in 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 enters active phase at container start boundary'); |
| |
| // Advance to start offset. |
| container.scrollTop = 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 midpoint. |
| container.scrollTop = 700; |
| await waitForNextFrame(); |
| assert_percents_equal(timeline.currentTime, 25, |
| "Timeline's current time at start offset"); |
| assert_percents_equal(anim.currentTime, 25, |
| "Animation's current time at start offset"); |
| assert_equals(getComputedStyle(target).opacity, '0.4', |
| 'Effect at the start of the active phase'); |
| |
| // Advance to end offset. |
| container.scrollTop = 800; |
| await waitForNextFrame(); |
| assert_percents_equal(timeline.currentTime, 50, |
| "Timeline's currentTime at max scroll offset"); |
| assert_percents_equal(anim.currentTime, 50, |
| "Animation's currentTime at max scroll offset"); |
| assert_equals(getComputedStyle(target).opacity, "0.5", |
| 'Effect at end of active phase'); |
| }, 'View timeline does not clamp end scroll offset at max scroll'); |
| |
| </script> |
| </html> |