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LibWeb: Use invalidation sets to reduce style recalculation

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Implements idea described in
https://docs.google.com/document/d/1vEW86DaeVs4uQzNFI5R-_xS9TcS1Cs_EUsHRSgCHGu8

Invalidation sets are used to reduce the number of elements marked for
style recalculation by collecting metadata from style rules about the
dependencies between properties that could affect an element’s style.

Currently, this optimization is only applied to style invalidation
triggered by class list mutations on an element.
This commit is contained in:
Aliaksandr Kalenik 2025-01-12 18:38:05 +03:00 • committed by Andreas Kling
commit c5f2a88f69
Notes: github-actions[bot] 2025-01-19 18:55:55 +00:00
11 changed files with 549 additions and 3 deletions
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3
Libraries/LibWeb/DOM/Element.h
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@ -263,6 +263,7 @@ public:
static GC::Ptr<Layout::NodeWithStyle> create_layout_node_for_display_type(DOM::Document&, CSS::Display const&, GC::Ref<CSS::ComputedProperties>, Element*);
bool affected_by_hover() const;
bool affected_by_invalidation_property(CSS::InvalidationSet::Property const&) const;
void set_pseudo_element_node(Badge<Layout::TreeBuilder>, CSS::Selector::PseudoElement::Type, GC::Ptr<Layout::NodeWithStyle>);
GC::Ptr<Layout::NodeWithStyle> get_pseudo_element_node(CSS::Selector::PseudoElement::Type) const;
@ -420,7 +421,7 @@ protected:
private:
void make_html_uppercased_qualified_name();
void invalidate_style_after_attribute_change(FlyString const& attribute_name);
void invalidate_style_after_attribute_change(FlyString const& attribute_name, Optional<String> const& old_value, Optional<String> const& new_value);
WebIDL::ExceptionOr<GC::Ptr<Node>> insert_adjacent(StringView where, GC::Ref<Node> node);