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LibWeb/CSS: Process style properties from CSSNestedDeclarations rules

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These are created when a style rule has properties listed after another
rule. For example:

```css

.test {
  --a: 1;
  --b: 1;
  --c: 1;

  .thing {
    /* ... */
  }

  /* These are after a rule (.thing) so they're wrapped in a
     CSSNestedDeclarations: */
  --d: 1;
  --e: 1;
  --f: 1;
}
```

They're treated like a nested style rule with the exact same selectors
as their containing style rule.
This commit is contained in:
Sam Atkins 2024-10-17 13:48:00 +01:00 • committed by Andreas Kling
commit e4245dc39e
Notes: github-actions[bot] 2024-10-17 18:57:04 +00:00
6 changed files with 78 additions and 17 deletions
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7
Userland/Libraries/LibWeb/CSS/StyleComputer.h
View file

@ -82,7 +82,7 @@ enum class CascadeOrigin : u8 {
struct MatchingRule {
JS::GCPtr<DOM::ShadowRoot const> shadow_root;
JS::GCPtr<CSSStyleRule const> rule;
JS::GCPtr<CSSRule const> rule; // Either CSSStyleRule or CSSNestedDeclarations
JS::GCPtr<CSSStyleSheet const> sheet;
size_t style_sheet_index { 0 };
size_t rule_index { 0 };
@ -94,6 +94,11 @@ struct MatchingRule {
bool can_use_fast_matches { false };
bool must_be_hovered { false };
bool skip { false };
// Helpers to deal with the fact that `rule` might be a CSSStyleRule or a CSSNestedDeclarations
PropertyOwningCSSStyleDeclaration const& declaration() const;
SelectorList const& absolutized_selectors() const;
FlyString const& qualified_layer_name() const;
};
struct FontFaceKey {