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https://github.com/LadybirdBrowser/ladybird.git
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879fc69f89
UA and user stylesheets do not have owner nodes or owner rules, so their matched rules cannot be mapped through the generic stylesheet identifier helper. Share the built-in UA stylesheet enumeration and map UA rules by the matched CSSStyleSheet object, so that they stay in sync with any future changes.
178 lines
6.9 KiB
C++
178 lines
6.9 KiB
C++
/*
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* Copyright (c) 2025, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/FlyString.h>
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#include <AK/HashMap.h>
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#include <AK/HashTable.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/Optional.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/Vector.h>
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#include <LibGC/Ptr.h>
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#include <LibWeb/Animations/KeyframeEffect.h>
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#include <LibWeb/CSS/CascadeOrigin.h>
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#include <LibWeb/CSS/CounterStyle.h>
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#include <LibWeb/CSS/InvalidationSet.h>
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#include <LibWeb/CSS/Selector.h>
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#include <LibWeb/CSS/SelectorInsights.h>
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#include <LibWeb/CSS/StyleInvalidationData.h>
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#include <LibWeb/CSS/StyleSheetIdentifier.h>
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#include <LibWeb/Forward.h>
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namespace Web::CSS {
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class StyleScope;
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struct MatchingRule {
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GC::Ptr<CSSRule const> rule; // Either CSSStyleRule or CSSNestedDeclarations
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GC::Ptr<CSSStyleSheet const> sheet;
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GC::Ptr<CSSContainerRule const> container_rule;
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GC::Ptr<CSSRule const> scope_rule; // Either CSSScopeRule or CSSImportRule
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Optional<FlyString> default_namespace;
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Selector const& selector;
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size_t selector_index { 0 };
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size_t style_sheet_index { 0 };
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size_t rule_index { 0 };
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u32 specificity { 0 };
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CascadeOrigin cascade_origin;
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bool contains_pseudo_element { false };
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bool slotted { false };
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bool contains_part_pseudo_element { false };
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// Helpers to deal with the fact that `rule` might be a CSSStyleRule or a CSSNestedDeclarations
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CSSStyleProperties const& declaration() const;
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SelectorList const& absolutized_selectors() const;
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FlyString const& qualified_layer_name() const;
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void visit_edges(GC::Cell::Visitor&) const;
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};
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struct RuleCache {
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HashMap<FlyString, Vector<MatchingRule>> rules_by_id;
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HashMap<FlyString, Vector<MatchingRule>> rules_by_class;
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HashMap<FlyString, Vector<MatchingRule>> rules_by_tag_name;
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HashMap<FlyString, Vector<MatchingRule>, AK::ASCIICaseInsensitiveFlyStringTraits> rules_by_attribute_name;
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Array<Vector<MatchingRule>, to_underlying(CSS::PseudoElement::KnownPseudoElementCount)> rules_by_pseudo_element;
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Vector<MatchingRule> root_rules;
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Vector<MatchingRule> slotted_rules;
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Vector<MatchingRule> part_rules;
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Vector<MatchingRule> other_rules;
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HashMap<FlyString, NonnullRefPtr<Animations::KeyframeEffect::KeyFrameSet>> rules_by_animation_keyframes;
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void add_rule(MatchingRule const&, Optional<PseudoElement>, bool contains_root_pseudo_class);
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void for_each_matching_rules(DOM::AbstractElement, Function<IterationDecision(Vector<MatchingRule> const&)> callback) const;
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void visit_edges(GC::Cell::Visitor&);
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};
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struct RuleCaches {
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RuleCache main;
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HashMap<FlyString, NonnullOwnPtr<RuleCache>> by_layer;
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void visit_edges(GC::Cell::Visitor&);
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};
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struct StyleCache : public RefCounted<StyleCache> {
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static NonnullRefPtr<StyleCache> create();
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static NonnullRefPtr<StyleCache> create_for_style_scope(StyleScope&);
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Vector<FlyString> qualified_layer_names_in_order;
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SelectorInsights selector_insights;
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Array<OwnPtr<RuleCache>, to_underlying(PseudoClass::__Count)> pseudo_class_rule_cache;
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StyleInvalidationData style_invalidation_data;
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RuleCaches author_rule_cache;
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RuleCaches user_rule_cache;
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RuleCaches user_agent_rule_cache;
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bool has_size_container_queries { false };
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void visit_edges(GC::Cell::Visitor&);
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};
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struct PendingHasInvalidationMutationFeatures {
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bool is_conservative { false };
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bool may_affect_sibling_relationships { false };
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bool may_affect_pseudo_classes { false };
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HashTable<FlyString> tag_names;
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HashTable<FlyString> ids;
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HashTable<FlyString> class_names;
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HashTable<FlyString> attribute_names;
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HashTable<PseudoClass> pseudo_classes;
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};
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class StyleScope {
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public:
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explicit StyleScope(GC::Ref<DOM::Node>);
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DOM::Node& node() const { return m_node; }
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DOM::Document& document() const;
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RuleCaches const& author_rule_cache() const { return m_rule_cache->author_rule_cache; }
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RuleCaches const& user_rule_cache() const { return m_rule_cache->user_rule_cache; }
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RuleCaches const& user_agent_rule_cache() const { return m_rule_cache->user_agent_rule_cache; }
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[[nodiscard]] bool has_valid_rule_cache() const { return m_rule_cache; }
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void invalidate_rule_cache();
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[[nodiscard]] RuleCache const& get_pseudo_class_rule_cache(PseudoClass) const;
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void for_each_stylesheet(CascadeOrigin, Function<void(CSS::CSSStyleSheet&)> const&) const;
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static WEB_API void for_each_user_agent_stylesheet(bool include_quirks_mode_stylesheet, Function<void(CSS::CSSStyleSheet&, StyleSheetIdentifier const&)> const&);
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static Optional<StyleSheetIdentifier> user_agent_style_sheet_identifier(CSS::CSSStyleSheet const&);
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void build_user_style_sheet_if_needed();
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void make_rule_cache_for_cascade_origin(CascadeOrigin, StyleCache&);
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void build_rule_cache();
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void build_rule_cache_if_needed() const;
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void populate_rule_cache(StyleCache&);
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static void collect_selector_insights(Selector const&, SelectorInsights&);
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void build_qualified_layer_names_cache(StyleCache&);
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[[nodiscard]] bool may_have_has_selectors() const;
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[[nodiscard]] bool may_have_user_has_selectors() const;
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[[nodiscard]] bool may_have_user_pseudo_class_selectors(PseudoClass) const;
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[[nodiscard]] bool have_has_selectors() const;
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[[nodiscard]] bool may_have_has_selectors_with_relative_selector_that_has_sibling_combinator() const;
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[[nodiscard]] bool have_has_selectors_with_relative_selector_that_has_sibling_combinator() const;
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[[nodiscard]] bool have_size_container_queries() const;
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void for_each_active_css_style_sheet(Function<void(CSS::CSSStyleSheet&)> const& callback) const;
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void invalidate_counter_style_cache();
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void build_counter_style_cache();
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RefPtr<CSS::CounterStyle const> get_registered_counter_style(FlyString const& name) const;
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void schedule_ancestors_style_invalidation_due_to_presence_of_has(GC::Ref<DOM::Node>);
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void record_conservative_pending_has_invalidation(GC::Ref<DOM::Node>, bool may_affect_sibling_relationships);
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void record_pending_has_invalidation_mutation_features(GC::Ref<DOM::Node>, GC::Ref<DOM::Node>, bool includes_descendants);
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void record_pending_has_invalidation_mutation_features(GC::Ref<DOM::Node>, Vector<CSS::InvalidationSet::Property> const&);
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template<typename T>
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Optional<T> dereference_global_tree_scoped_reference(Function<Optional<T>(StyleScope const&)> const& callback) const;
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void visit_edges(GC::Cell::Visitor&);
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RefPtr<StyleCache> m_rule_cache;
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GC::Ptr<CSSStyleSheet> m_user_style_sheet;
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OrderedHashMap<GC::Ref<DOM::Node>, PendingHasInvalidationMutationFeatures> m_pending_has_invalidations;
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bool m_needs_counter_style_cache_update : 1 { true };
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bool m_is_doing_counter_style_cache_update : 1 { false };
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HashMap<FlyString, NonnullRefPtr<CSS::CounterStyle const>> m_registered_counter_styles;
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GC::Ref<DOM::Node> m_node;
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};
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}
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