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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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30
components/layout_2020/replaced.rs
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@ -415,11 +415,20 @@ impl ReplacedContent {
containing_block: &IndefiniteContainingBlock,
style: &ComputedValues,
) -> Option<AspectRatio> {
style.preferred_aspect_ratio(
self.inline_size_over_block_size_intrinsic_ratio(style),
containing_block.try_into().ok().as_ref(),
containing_block.style.writing_mode,
)
style
.preferred_aspect_ratio(
self.inline_size_over_block_size_intrinsic_ratio(style),
containing_block.try_into().ok().as_ref(),
containing_block.style.writing_mode,
)
.or_else(|| {
matches!(self.kind, ReplacedContentKind::Video(_)).then(|| {
let size = Self::default_object_size();
AspectRatio::from_content_ratio(
size.width.to_f32_px() / size.height.to_f32_px(),
)
})
})
}
/// <https://drafts.csswg.org/css2/visudet.html#inline-replaced-width>
@ -475,16 +484,7 @@ impl ReplacedContent {
) -> LogicalVec2<Au> {
let mode = style.writing_mode;
let intrinsic_size = self.flow_relative_intrinsic_size(style);
let intrinsic_ratio = self
.preferred_aspect_ratio(&containing_block.into(), style)
.or_else(|| {
matches!(self.kind, ReplacedContentKind::Video(_)).then(|| {
let size = Self::default_object_size();
AspectRatio::from_content_ratio(
size.width.to_f32_px() / size.height.to_f32_px(),
)
})
});
let intrinsic_ratio = self.preferred_aspect_ratio(&containing_block.into(), style);
let default_object_size =
|| LogicalVec2::from_physical_size(&Self::default_object_size(), mode);