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[@layer] Cascade VTT-embedded style as element-attached style #31591

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merged 1 commit into from
Nov 11, 2021
Merged

[@layer] Cascade VTT-embedded style as element-attached style #31591

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23 changes: 23 additions & 0 deletions webvtt/rendering/cues-with-video/processing-model/embedded_style_cascade_priority_layer.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
<!DOCTYPE html>
<html class="reftest-wait">
<title>Embedded Style: Cascade Priority</title>
<link rel="match" href="embedded_style_cascade_priority-ref.html">
<link rel="help" href="https://w3c.github.io/webvtt/#obtaining-css-boxes">
<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#cascade-sort">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<script src="/common/reftest-wait.js"></script>
<style>
/* Embedded important style should take precedence over author important style
regardless of layers, so the cue color should be green. */
@layer {
::cue {
color: red !important;
}
}
</style>
<video width="320" height="180" autoplay onplaying="this.onplaying = null; this.pause(); takeScreenshot();">
<source src="/media/white.webm" type="video/webm">
<source src="/media/white.mp4" type="video/mp4">
<track src="support/embedded_style_cascade_priority_layer.vtt" default>
</video>
</html>
25 changes: 25 additions & 0 deletions ...dering/cues-with-video/processing-model/support/embedded_style_cascade_priority_layer.vtt
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Original file line number Diff line number Diff line change
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WEBVTT

NOTE
opacity: 0.5; should apply.
color: green; should apply.
background: green; should apply because multiple STYLE blocks are supported.

STYLE
::cue {
opacity: 0.5;
}
::cue {
color: green !important;
}

STYLE
::cue {
background: green;
}

00:00:00.000 --> 00:00:05.000
<v Voice1>This <i>is</i> a <b>test</b> subtitle

00:00:00.000 --> 00:00:05.000
<v Voice2>Here <i>is</i> a <b>second</b> subtitle