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LibWeb: Implement anchor-size(..) function parsing

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This parses `anchor-size(..)` functions in CSS, but does not yet result
in a useful `Size`: we need style & layout interleaving similar to
container queries for this, since the resulting value depends on layout
results.

Not supported yet: `anchor-size()` appearing inside a `calc()` node.

Adds 4280 WPT subtest passes in `css/css-anchor-position`.
This commit is contained in:
Jelle Raaijmakers 2025-07-30 14:14:53 +02:00 • committed by Tim Ledbetter
parent 02598040ad
commit c4f5e7bee3
Notes: github-actions[bot] 2025-07-30 17:15:09 +00:00
16 changed files with 318 additions and 3 deletions
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Libraries/LibWeb/CSS/Parser/Parser.h
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@ -396,6 +396,7 @@ private:
RefPtr<StringStyleValue const> parse_opentype_tag_value(TokenStream<ComponentValue>&);
RefPtr<FontSourceStyleValue const> parse_font_source_value(TokenStream<ComponentValue>&);
RefPtr<CSSStyleValue const> parse_anchor_size(TokenStream<ComponentValue>&);
RefPtr<CSSStyleValue const> parse_angle_value(TokenStream<ComponentValue>&);
RefPtr<CSSStyleValue const> parse_angle_percentage_value(TokenStream<ComponentValue>&);
RefPtr<CSSStyleValue const> parse_flex_value(TokenStream<ComponentValue>&);