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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "CSSSelector.h"
#include "ElementRuleCollector.h"
#include "InspectorCSSOMWrappers.h"
#include "MatchedDeclarationsCache.h"
#include "MediaQueryEvaluator.h"
#include "RuleSet.h"
#include "StyleScopeRuleSets.h"
#include <memory>
#include <wtf/HashMap.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include <wtf/WeakPtr.h>
#include <wtf/text/AtomStringHash.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
class BlendingKeyframe;
class BlendingKeyframes;
class CSSStyleSheet;
class Document;
class Element;
class RenderStyle;
class RuleData;
class RuleSet;
class SelectorFilter;
class Settings;
class StyleRuleKeyframe;
class StyleProperties;
class StyleRule;
class StyleRuleKeyframes;
class StyleRulePage;
class StyleSheet;
class StyleSheetList;
class TimingFunction;
class ViewportStyleResolver;
// MatchOnlyUserAgentRules is used in media queries, where relative units
// are interpreted according to the document root element style, and styled only
// from the User Agent Stylesheet rules.
enum class RuleMatchingBehavior: uint8_t {
MatchAllRules,
MatchAllRulesExcludingSMIL,
MatchOnlyUserAgentRules,
};
namespace Style {
struct BuilderContext;
struct ResolvedStyle;
struct SelectorMatchingState;
struct ResolutionContext {
const RenderStyle* parentStyle;
const RenderStyle* parentBoxStyle { nullptr };
// This needs to be provided during style resolution when up-to-date document element style is not available via DOM.
const RenderStyle* documentElementStyle { nullptr };
SelectorMatchingState* selectorMatchingState { nullptr };
bool isSVGUseTreeRoot { false };
};
using KeyframesRuleMap = UncheckedKeyHashMap<AtomString, RefPtr<StyleRuleKeyframes>>;
class Resolver : public RefCounted<Resolver>, public CanMakeSingleThreadWeakPtr<Resolver> {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(Resolver);
public:
// Style resolvers are shared between shadow trees with identical styles. That's why we don't simply provide a Style::Scope.
enum class ScopeType : bool { Document, ShadowTree };
static Ref<Resolver> create(Document&, ScopeType);
~Resolver();
ResolvedStyle styleForElement(Element&, const ResolutionContext&, RuleMatchingBehavior = RuleMatchingBehavior::MatchAllRules);
ResolvedStyle styleForElementWithCachedMatchResult(Element&, const ResolutionContext&, const MatchResult&, const RenderStyle& existingRenderStyle);
void keyframeStylesForAnimation(Element&, const RenderStyle& elementStyle, const ResolutionContext&, BlendingKeyframes&, const TimingFunction*);
WEBCORE_EXPORT std::optional<ResolvedStyle> styleForPseudoElement(Element&, const PseudoElementRequest&, const ResolutionContext&);
std::unique_ptr<RenderStyle> styleForPage(int pageIndex);
std::unique_ptr<RenderStyle> defaultStyleForElement(const Element*);
Document& document();
const Document& document() const;
const Settings& settings() const;
ScopeType scopeType() const { return m_scopeType; }
void appendAuthorStyleSheets(const Vector<RefPtr<CSSStyleSheet>>&);
ScopeRuleSets& ruleSets() { return m_ruleSets; }
const ScopeRuleSets& ruleSets() const { return m_ruleSets; }
const MQ::MediaQueryEvaluator& mediaQueryEvaluator() const { return m_mediaQueryEvaluator; }
void addCurrentSVGFontFaceRules();
std::unique_ptr<RenderStyle> styleForKeyframe(Element&, const RenderStyle& elementStyle, const ResolutionContext&, const StyleRuleKeyframe&, BlendingKeyframe&);
bool isAnimationNameValid(const String&);
void setViewTransitionStyles(CSSSelector::PseudoElement, const AtomString&, Ref<MutableStyleProperties>);
// These methods will give back the set of rules that matched for a given element (or a pseudo-element).
enum CSSRuleFilter {
UAAndUserCSSRules = 1 << 1,
AuthorCSSRules = 1 << 2,
EmptyCSSRules = 1 << 3,
AllButEmptyCSSRules = UAAndUserCSSRules | AuthorCSSRules,
AllCSSRules = AllButEmptyCSSRules | EmptyCSSRules,
};
Vector<RefPtr<const StyleRule>> styleRulesForElement(const Element*, unsigned rulesToInclude = AllButEmptyCSSRules);
Vector<RefPtr<const StyleRule>> pseudoStyleRulesForElement(const Element*, const std::optional<Style::PseudoElementRequest>&, unsigned rulesToInclude = AllButEmptyCSSRules);
bool hasSelectorForId(const AtomString&) const;
bool hasSelectorForAttribute(const Element&, const AtomString&) const;
bool hasViewportDependentMediaQueries() const;
std::optional<DynamicMediaQueryEvaluationChanges> evaluateDynamicMediaQueries();
static KeyframesRuleMap& userAgentKeyframes();
static void addUserAgentKeyframeStyle(Ref<StyleRuleKeyframes>&&);
void addKeyframeStyle(Ref<StyleRuleKeyframes>&&);
Vector<Ref<StyleRuleKeyframe>> keyframeRulesForName(const AtomString&, const TimingFunction*) const;
RefPtr<StyleRuleViewTransition> viewTransitionRule() const;
bool usesFirstLineRules() const { return m_ruleSets.features().usesFirstLineRules; }
bool usesFirstLetterRules() const { return m_ruleSets.features().usesFirstLetterRules; }
bool usesStartingStyleRules() const { return m_ruleSets.features().hasStartingStyleRules; }
void invalidateMatchedDeclarationsCache();
void clearCachedDeclarationsAffectedByViewportUnits();
InspectorCSSOMWrappers& inspectorCSSOMWrappers() { return m_inspectorCSSOMWrappers; }
bool isSharedBetweenShadowTrees() const { return m_isSharedBetweenShadowTrees; }
void setSharedBetweenShadowTrees() { m_isSharedBetweenShadowTrees = true; }
const RenderStyle* rootDefaultStyle() const { return m_rootDefaultStyle.get(); }
private:
Resolver(Document&, ScopeType);
void initialize();
class State;
State initializeStateAndStyle(const Element&, const ResolutionContext&);
BuilderContext builderContext(const State&);
void applyMatchedProperties(State&, const MatchResult&);
WeakPtr<Document, WeakPtrImplWithEventTargetData> m_document;
const ScopeType m_scopeType;
ScopeRuleSets m_ruleSets;
KeyframesRuleMap m_keyframesRuleMap;
MQ::MediaQueryEvaluator m_mediaQueryEvaluator;
std::unique_ptr<RenderStyle> m_rootDefaultStyle;
InspectorCSSOMWrappers m_inspectorCSSOMWrappers;
MatchedDeclarationsCache m_matchedDeclarationsCache;
bool m_matchAuthorAndUserStyles { true };
bool m_isSharedBetweenShadowTrees { false };
};
} // namespace Style
} // namespace WebCore
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