inline-view-timeline-current-time.tentative.html

<!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-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:  200px;

    display:  inline-block;

</style>

<body>

  <div id="container">

    <div id="content">

      <div id="leading-space" class="spacer"></div>

      <div id="target"></div>

      <div id="trailing-space" class="spacer"></div>

    </div>

  </div>

</body>

<script type="text/javascript">

  promise_test(async t => {

    container.scrollLeft = 0;

    await waitForNextFrame();

    const anim = CreateViewTimelineOpacityAnimation(t, target,

                                                      timeline:

                                                        {axis: 'inline'}

});

    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, '1',

                  'Effect is in the after 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 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';

    content.style = 'width: 1000px';

    t.add_cleanup(() => {

      leading.style = null;

      content.style = null;

});

    container.scrollLeft = 0;

    await waitForNextFrame();

    const anim = CreateViewTimelineOpacityAnimation(t, target,

                                                      timeline:

                                                        {axis: 'inline'}

});

    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.scrollLeft = 100;

    await waitForNextFrame();

    assert_percents_equal(timeline.currentTime, 75,

                          "Timeline's current time at the midpoint");

    assert_percents_equal(anim.currentTime, 75,

                          "Animation's current time at the midpoint");

    assert_equals(getComputedStyle(target).opacity, '0.6',

                  'Effect at the midpoint of the active phase');

    // Advance to end-offset

    container.scrollLeft = 200;

    await waitForNextFrame();

    assert_percents_equal(timeline.currentTime, 100,

                          "Timeline's current time at end offset");

    assert_percents_equal(anim.currentTime, 100,

                          "Animation's current time at end offset");

    assert_equals(getComputedStyle(target).opacity, '1',

                  'Effect at the end of the active phase');

    // Advance to scroll limit.

    container.scrollLeft = 800;

    await waitForNextFrame();

    assert_percents_equal(timeline.currentTime, 250,

                          "Timeline's current time at the scroll limit");

    assert_percents_equal(anim.currentTime, 100,

                          "Animation's current time at the scroll limit");

    assert_equals(getComputedStyle(target).opacity, '1',

                  'Effect at the scroll limit');

  }, 'View timeline does not clamp starting scroll offset at 0');

  promise_test(async t => {

    const trailing = document.getElementById('trailing-space');

    trailing.style = 'display: none';

    content.style = 'width: 1000px';

    t.add_cleanup(() => {

      trailing.style = null;

      content.style = null;

});

    container.scrollLeft = 0;

    await waitForNextFrame();

    const anim = CreateViewTimelineOpacityAnimation(t, target,

                                                      timeline:

                                                        {axis: 'inline'}

});

    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.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 midpoint

    container.scrollLeft = 700;

    await waitForNextFrame();

    assert_percents_equal(timeline.currentTime, 25,

                          "Timeline's current time at midpoint");

    assert_percents_equal(anim.currentTime, 25,

                          "Animation's current time at midpoint");

    assert_equals(getComputedStyle(target).opacity, '0.4',

                  'Effect at the midpoint of the active phase');

    // Advance to end offset.

    container.scrollLeft = 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");

    // The active-after boundary is inclusive since at the scroll-limit.

    assert_equals(getComputedStyle(target).opacity, "0.5",

                  'Effect at end of active phase');

  }, 'View timeline does not clamp end scroll offset at max scroll');

  promise_test(async t => {

    container.style = "direction: rtl";

    container.scrollLeft = 0;

    t.add_cleanup(() => {

      content.style = null;

});

    await waitForNextFrame();

    const anim = CreateViewTimelineOpacityAnimation(t, target,

                                                      timeline:

                                                        {axis: 'inline'}

});

    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, '1',

                  'Effect is in the after 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 RTL layout' );

</script>

</html>

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