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layout: Fix intrinsic contributions of anonymous blocks (#34719)

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In order to compute the inline min-content and max-content contributions
of an anonymous block, we were finding its min-content and max-content
inline size with a SizeConstraint coming from the block size of the box.

However, anonymous blocks do not establish a containing block for their
contents, so this patch uses a SizeConstraint from the block size of the
containing block.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Oriol Brufau 2024-12-21 22:42:21 -08:00 • committed by GitHub
parent 1157fa28b3
commit 09408ae10b
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6 changed files with 91 additions and 22 deletions
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54
components/layout_2020/sizing.rs
View file

@ -109,12 +109,14 @@ impl From<Au> for ContentSizes {
}
}
#[allow(clippy::too_many_arguments)]
pub(crate) fn outer_inline(
style: &ComputedValues,
containing_block: &IndefiniteContainingBlock,
auto_minimum: &LogicalVec2<Au>,
auto_block_size_stretches_to_containing_block: bool,
is_table: bool,
establishes_containing_block: bool,
get_preferred_aspect_ratio: impl FnOnce(&LogicalVec2<Au>) -> Option<AspectRatio>,
get_content_size: impl FnOnce(&ConstraintSpace) -> InlineContentSizesResult,
) -> InlineContentSizesResult {
@ -129,28 +131,40 @@ pub(crate) fn outer_inline(
inline: pbm.padding_border_sums.inline + margin.inline_sum(),
};
let content_size = LazyCell::new(|| {
let available_block_size = containing_block
.size
.block
.non_auto()
.map(|v| Au::zero().max(v - pbm_sums.block));
let automatic_size = if content_box_sizes.block.preferred.is_initial() &&
auto_block_size_stretches_to_containing_block
{
depends_on_block_constraints = true;
Size::Stretch
let constraint_space = if establishes_containing_block {
let available_block_size = containing_block
.size
.block
.non_auto()
.map(|v| Au::zero().max(v - pbm_sums.block));
let automatic_size = if content_box_sizes.block.preferred.is_initial() &&
auto_block_size_stretches_to_containing_block
{
depends_on_block_constraints = true;
Size::Stretch
} else {
Size::FitContent
};
ConstraintSpace::new(
content_box_sizes.block.resolve_extrinsic(
automatic_size,
auto_minimum.block,
available_block_size,
),
style.writing_mode,
get_preferred_aspect_ratio(&pbm.padding_border_sums),
)
} else {
Size::FitContent
// This assumes that there is no preferred aspect ratio, or that there is no
// block size constraint to be transferred so the ratio is irrelevant.
// We only get into here for anonymous blocks, for which the assumption holds.
ConstraintSpace::new(
containing_block.size.block.into(),
containing_block.writing_mode,
None,
)
};
get_content_size(&ConstraintSpace::new(
content_box_sizes.block.resolve_extrinsic(
automatic_size,
auto_minimum.block,
available_block_size,
),
style.writing_mode,
get_preferred_aspect_ratio(&pbm.padding_border_sums),
))
get_content_size(&constraint_space)
});
let resolve_non_initial = |inline_size| {
Some(match inline_size {