mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-05-03 13:02:09 +02:00
9fae2bcff9
Track the simple selector features that appear inside :has() arguments on each StyleScope, then consult that metadata before scheduling an ancestor walk for a structural mutation. If the mutated subtree has no tag, id, class, attribute, or pseudo-class feature that any cached :has() argument cares about, skip the walk entirely. Stay conservative for featureless-sensitive arguments such as :has(*), :has(:not(...)), :has(:empty), and child-index pseudos: an unfeatured node can still start or stop matching there. Track that case via a new has_selectors_sensitive_to_featureless_subtree_changes flag on StyleInvalidationData and fall back to the old conservative walk. Stay conservative for pseudo-classes the subtree filter cannot probe (:focus, :hover, validation pseudos). Move :default out of the set of trackable feature pseudo-classes for the same reason; it now triggers the conservative walk where it previously recorded metadata. Tag and attribute names are stored lowercased, so for non-HTML elements (SVG, MathML) treat lowercased matches as scheduling hints only; the actual :has() match still goes through case-sensitive selector matching. Test counter expectations are rebaselined to reflect the skipped walks and reduced recomputations. Matching behavior is unchanged.
98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
/*
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* Copyright (c) 2025, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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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/HashMap.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/Vector.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/Forward.h>
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namespace Web::CSS {
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enum class ExcludePropertiesNestedInNotPseudoClass : bool {
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No,
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Yes,
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};
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enum class InsideNthChildPseudoClass {
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No,
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Yes,
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};
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enum class HasArgumentScope : u8 {
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ChildrenOnly,
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AllDescendants,
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NextSiblingOnly,
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AllFollowingSiblings,
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Complex,
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};
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struct InvalidationPlan;
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struct DescendantInvalidationRule {
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InvalidationSet match_set;
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bool match_any { false };
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NonnullRefPtr<InvalidationPlan> payload;
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bool operator==(DescendantInvalidationRule const&) const;
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};
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enum class SiblingInvalidationReach {
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Adjacent,
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Subsequent,
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};
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struct SiblingInvalidationRule {
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SiblingInvalidationReach reach;
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InvalidationSet match_set;
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bool match_any { false };
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NonnullRefPtr<InvalidationPlan> payload;
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bool operator==(SiblingInvalidationRule const&) const;
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};
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struct InvalidationPlan final : RefCounted<InvalidationPlan> {
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static NonnullRefPtr<InvalidationPlan> create() { return adopt_ref(*new InvalidationPlan); }
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bool is_empty() const;
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void include_all_from(InvalidationPlan const&);
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bool operator==(InvalidationPlan const&) const;
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bool invalidate_self { false };
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bool invalidate_whole_subtree { false };
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Vector<DescendantInvalidationRule> descendant_rules;
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Vector<SiblingInvalidationRule> sibling_rules;
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};
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struct HasInvalidationMetadata {
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Selector const* relative_selector { nullptr };
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HasArgumentScope scope { HasArgumentScope::Complex };
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bool operator==(HasInvalidationMetadata const&) const = default;
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};
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struct StyleInvalidationData;
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void build_invalidation_sets_for_simple_selector(Selector::SimpleSelector const&, InvalidationSet&, ExcludePropertiesNestedInNotPseudoClass, StyleInvalidationData&, InsideNthChildPseudoClass);
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struct StyleInvalidationData {
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HashMap<InvalidationSet::Property, NonnullRefPtr<InvalidationPlan>> invalidation_plans;
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HashMap<FlyString, Vector<HasInvalidationMetadata>> ids_used_in_has_selectors;
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HashMap<FlyString, Vector<HasInvalidationMetadata>> class_names_used_in_has_selectors;
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HashMap<FlyString, Vector<HasInvalidationMetadata>> attribute_names_used_in_has_selectors;
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HashMap<FlyString, Vector<HasInvalidationMetadata>> tag_names_used_in_has_selectors;
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HashMap<PseudoClass, Vector<HasInvalidationMetadata>> pseudo_classes_used_in_has_selectors;
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bool has_selectors_sensitive_to_featureless_subtree_changes { false };
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void build_invalidation_sets_for_selector(Selector const& selector);
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};
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}
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