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Properly handle fallback aspect ratio for videos (#34082)

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A `<video>` element with no source won't have a natural aspect ratio,
but `aspect-ratio: auto` should still fall back to a ratio of 300/150.

`used_size_as_if_inline_element_from_content_box_sizes()` was already
handling this, but other consumers of `preferred_aspect_ratio()` were
wrong. In particular, this resulted in a 0px wide inline-block:

```html
<div style="display: inline-block; border: solid">
  <video style="height: 100px; background: cyan"></video>
</div>
```

So this patch moves the fallback into `preferred_aspect_ratio()`.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Oriol Brufau 2024-10-31 15:45:03 +01:00 • committed by GitHub
parent 31566aef02
commit 851b125d4b
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4 changed files with 70 additions and 15 deletions
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7
tests/wpt/meta/MANIFEST.json vendored
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@ -570555,6 +570555,13 @@
{}
]
],
"intrinsic-size-fallback-video.html": [
"c9f2a0539147524c7e4945c6ea2ef0f05b07323f",
[
null,
{}
]
],
"keyword-sizes-for-intrinsic-contributions.tentative.html": [
"5f135d8181b023134eb24e5ec34957e3a25e6765",
[

9
tests/wpt/meta/css/css-sizing/intrinsic-size-fallback-video.html.ini vendored Normal file
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@ -0,0 +1,9 @@
[intrinsic-size-fallback-video.html]
[.wrapper 1]
expected: FAIL
[.wrapper 3]
expected: FAIL
[.wrapper 4]
expected: FAIL

39
tests/wpt/tests/css/css-sizing/intrinsic-size-fallback-video.html vendored Normal file
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@ -0,0 +1,39 @@
<!DOCTYPE html>
<title>CSS Sizing Test: intrinsic contribution of videos with fallback size</title>
<link rel="author" title="Oriol Brufau" href="obrufau@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#intrinsic-sizes">
<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#intrinsic-contribution">
<meta name="assert" content="
These <video>s have no natural size nor natural aspect ratio,
but fall back to default size of 300x150 and ratio of 300/150.
Their intrinsic contributions should take these fallbacks into account.">
<style>
.wrapper {
float: left;
clear: both;
border: solid;
}
video {
background: cyan;
}
</style>
<div id="log"></div>
<div class="wrapper" data-expected-client-width="300">
<video></video>
</div>
<div class="wrapper" data-expected-client-width="200">
<video style="height: 100px"></video>
</div>
<div class="wrapper" data-expected-client-width="100">
<video style="max-height: 50px"></video>
</div>
<div class="wrapper" data-expected-client-width="400">
<video style="min-height: 200px"></video>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script>
checkLayout(".wrapper");
</script>