2020-01-18 11:38:21 +03:00
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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2022-09-27 18:46:22 +03:00
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* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
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2020-01-18 11:38:21 +03:00
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*
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2021-04-22 11:24:48 +03:00
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* SPDX-License-Identifier: BSD-2-Clause
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2020-01-18 11:38:21 +03:00
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*/
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2019-06-27 18:47:59 +03:00
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#pragma once
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2021-12-03 23:00:31 +03:00
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#include <AK/HashMap.h>
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2019-06-27 18:47:59 +03:00
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#include <AK/NonnullRefPtrVector.h>
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2022-02-24 18:54:12 +03:00
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#include <AK/Optional.h>
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2019-09-21 15:32:17 +03:00
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#include <AK/OwnPtr.h>
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2022-03-29 03:14:20 +03:00
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#include <LibWeb/CSS/CSSFontFaceRule.h>
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2021-05-25 00:02:58 +03:00
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#include <LibWeb/CSS/CSSStyleDeclaration.h>
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2022-03-31 13:43:07 +03:00
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#include <LibWeb/CSS/Parser/ComponentValue.h>
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2022-09-27 18:46:22 +03:00
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#include <LibWeb/CSS/Parser/TokenStream.h>
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2022-02-24 18:54:12 +03:00
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#include <LibWeb/CSS/Selector.h>
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2020-03-07 12:32:51 +03:00
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#include <LibWeb/CSS/StyleProperties.h>
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2020-07-26 20:37:56 +03:00
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#include <LibWeb/Forward.h>
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2019-06-27 18:47:59 +03:00
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2020-07-26 21:01:35 +03:00
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namespace Web::CSS {
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2020-03-07 12:27:02 +03:00
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2020-06-13 01:44:26 +03:00
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struct MatchingRule {
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2022-08-07 16:46:44 +03:00
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CSSStyleRule const* rule { nullptr };
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2020-06-13 01:44:26 +03:00
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size_t style_sheet_index { 0 };
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size_t rule_index { 0 };
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size_t selector_index { 0 };
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2021-05-25 00:01:24 +03:00
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u32 specificity { 0 };
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2020-06-13 01:44:26 +03:00
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};
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2021-12-03 23:00:31 +03:00
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class PropertyDependencyNode : public RefCounted<PropertyDependencyNode> {
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public:
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2022-12-04 21:02:33 +03:00
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static NonnullRefPtr<PropertyDependencyNode> create(DeprecatedString name)
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{
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return adopt_ref(*new PropertyDependencyNode(move(name)));
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}
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void add_child(NonnullRefPtr<PropertyDependencyNode>);
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bool has_cycles();
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private:
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explicit PropertyDependencyNode(DeprecatedString name);
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2021-12-03 23:00:31 +03:00
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2022-12-04 21:02:33 +03:00
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DeprecatedString m_name;
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2021-12-03 23:00:31 +03:00
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NonnullRefPtrVector<PropertyDependencyNode> m_children;
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bool m_marked { false };
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};
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2021-09-24 14:49:57 +03:00
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class StyleComputer {
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2019-06-27 18:47:59 +03:00
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public:
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explicit StyleComputer(DOM::Document&);
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~StyleComputer();
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2019-06-27 18:47:59 +03:00
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2020-07-26 20:37:56 +03:00
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DOM::Document& document() { return m_document; }
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2021-07-14 18:56:11 +03:00
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DOM::Document const& document() const { return m_document; }
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2019-06-27 18:47:59 +03:00
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2021-09-23 20:48:41 +03:00
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NonnullRefPtr<StyleProperties> create_document_style() const;
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2022-12-06 09:08:20 +03:00
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ErrorOr<NonnullRefPtr<StyleProperties>> compute_style(DOM::Element&, Optional<CSS::Selector::PseudoElement> = {}) const;
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2019-06-27 18:47:59 +03:00
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2021-09-21 12:38:18 +03:00
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// https://www.w3.org/TR/css-cascade/#origin
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enum class CascadeOrigin {
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Author,
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User,
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UserAgent,
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Animation,
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Transition,
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};
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2022-02-24 18:54:12 +03:00
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Vector<MatchingRule> collect_matching_rules(DOM::Element const&, CascadeOrigin, Optional<CSS::Selector::PseudoElement>) const;
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2019-06-27 21:40:21 +03:00
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2022-02-10 19:49:50 +03:00
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void invalidate_rule_cache();
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2022-03-11 15:53:32 +03:00
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Gfx::Font const& initial_font() const;
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2022-03-29 03:14:20 +03:00
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void did_load_font(FlyString const& family_name);
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2022-04-08 22:27:35 +03:00
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void load_fonts_from_sheet(CSSStyleSheet const&);
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2019-06-27 18:47:59 +03:00
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private:
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ErrorOr<void> compute_cascaded_values(StyleProperties&, DOM::Element&, Optional<CSS::Selector::PseudoElement>) const;
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2022-02-24 18:54:12 +03:00
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void compute_font(StyleProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement>) const;
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void compute_defaulted_values(StyleProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement>) const;
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void absolutize_values(StyleProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement>) const;
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void transform_box_type_if_needed(StyleProperties&, DOM::Element const&, Optional<CSS::Selector::PseudoElement>) const;
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2021-09-23 14:13:51 +03:00
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2022-02-24 18:54:12 +03:00
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void compute_defaulted_property_value(StyleProperties&, DOM::Element const*, CSS::PropertyID, Optional<CSS::Selector::PseudoElement>) const;
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2021-09-21 12:38:18 +03:00
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2022-03-13 19:07:14 +03:00
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RefPtr<StyleValue> resolve_unresolved_style_value(DOM::Element&, PropertyID, UnresolvedStyleValue const&) const;
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2022-11-02 22:19:03 +03:00
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bool expand_variables(DOM::Element&, StringView property_name, HashMap<FlyString, NonnullRefPtr<PropertyDependencyNode>>& dependencies, Parser::TokenStream<Parser::ComponentValue>& source, Vector<Parser::ComponentValue>& dest) const;
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bool expand_unresolved_values(DOM::Element&, StringView property_name, Parser::TokenStream<Parser::ComponentValue>& source, Vector<Parser::ComponentValue>& dest) const;
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2021-12-03 15:32:12 +03:00
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2019-10-05 10:01:12 +03:00
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template<typename Callback>
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void for_each_stylesheet(CascadeOrigin, Callback) const;
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2022-03-19 20:08:52 +03:00
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Gfx::IntRect viewport_rect() const;
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2022-11-08 20:29:52 +03:00
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CSSPixels root_element_font_size() const;
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2022-03-19 20:08:52 +03:00
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2021-09-21 12:38:18 +03:00
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struct MatchingRuleSet {
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Vector<MatchingRule> user_agent_rules;
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Vector<MatchingRule> author_rules;
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};
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2022-03-13 19:07:14 +03:00
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void cascade_declarations(StyleProperties&, DOM::Element&, Vector<MatchingRule> const&, CascadeOrigin, Important important) const;
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2019-10-05 10:01:12 +03:00
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2022-02-10 19:49:50 +03:00
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void build_rule_cache();
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void build_rule_cache_if_needed() const;
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2020-07-26 20:37:56 +03:00
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DOM::Document& m_document;
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2022-02-10 19:49:50 +03:00
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struct RuleCache {
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2022-02-10 20:50:58 +03:00
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HashMap<FlyString, Vector<MatchingRule>> rules_by_id;
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2022-02-10 19:49:50 +03:00
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HashMap<FlyString, Vector<MatchingRule>> rules_by_class;
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2022-02-10 20:59:19 +03:00
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HashMap<FlyString, Vector<MatchingRule>> rules_by_tag_name;
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2022-02-25 20:50:06 +03:00
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HashMap<Selector::PseudoElement, Vector<MatchingRule>> rules_by_pseudo_element;
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2022-02-10 19:49:50 +03:00
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Vector<MatchingRule> other_rules;
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};
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OwnPtr<RuleCache> m_rule_cache;
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2022-03-29 03:14:20 +03:00
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class FontLoader;
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2022-12-04 21:02:33 +03:00
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HashMap<DeprecatedString, NonnullOwnPtr<FontLoader>> m_loaded_fonts;
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2019-06-27 18:47:59 +03:00
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};
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2020-03-07 12:27:02 +03:00
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}
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