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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 "CSSToLengthConversionData.h"
#include "CSSToStyleMap.h"
#include "DocumentRuleSets.h"
#include "InspectorCSSOMWrappers.h"
#include "MediaQueryEvaluator.h"
#include "RenderStyle.h"
#include "RuleSet.h"
#include "SelectorChecker.h"
#include <bitset>
#include <memory>
#include <wtf/Bitmap.h>
#include <wtf/HashMap.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include <wtf/text/AtomicStringHash.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
class CSSCursorImageValue;
class CSSFontFace;
class CSSFontFaceRule;
class CSSFontValue;
class CSSImageGeneratorValue;
class CSSImageSetValue;
class CSSImageValue;
class CSSPageRule;
class CSSPrimitiveValue;
class CSSProperty;
class CSSStyleSheet;
class CSSValue;
class ContainerNode;
class Document;
class Element;
class Frame;
class FrameView;
class KeyframeList;
class KeyframeValue;
class MediaQueryEvaluator;
class Node;
class RenderScrollbar;
class RuleData;
class RuleSet;
class SelectorFilter;
class Settings;
class StyleCachedImage;
class StyleGeneratedImage;
class StyleImage;
class StyleRuleKeyframe;
class StyleProperties;
class StyleRule;
class StyleRuleKeyframes;
class StyleRulePage;
class StyleSheet;
class StyleSheetList;
class StyledElement;
class SVGSVGElement;
class ViewportStyleResolver;
struct ResourceLoaderOptions;
// 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,
};
enum class CascadeLevel: uint8_t {
UserAgentLevel,
AuthorLevel,
UserLevel
};
class PseudoStyleRequest {
public:
PseudoStyleRequest(PseudoId pseudoId, RenderScrollbar* scrollbar = nullptr, ScrollbarPart scrollbarPart = NoPart)
: pseudoId(pseudoId)
, scrollbarPart(scrollbarPart)
, scrollbar(scrollbar)
{
}
PseudoId pseudoId;
ScrollbarPart scrollbarPart;
RenderScrollbar* scrollbar;
};
struct ElementStyle {
ElementStyle(std::unique_ptr<RenderStyle> renderStyle, std::unique_ptr<Style::Relations> relations = { })
: renderStyle(WTFMove(renderStyle))
, relations(WTFMove(relations))
{ }
std::unique_ptr<RenderStyle> renderStyle;
std::unique_ptr<Style::Relations> relations;
};
// This class selects a RenderStyle for a given element based on a collection of stylesheets.
class StyleResolver {
WTF_MAKE_NONCOPYABLE(StyleResolver); WTF_MAKE_FAST_ALLOCATED;
public:
StyleResolver(Document&);
~StyleResolver();
ElementStyle styleForElement(const Element&, const RenderStyle* parentStyle, const RenderStyle* parentBoxStyle = nullptr, RuleMatchingBehavior = RuleMatchingBehavior::MatchAllRules, const SelectorFilter* = nullptr);
void keyframeStylesForAnimation(const Element&, const RenderStyle*, KeyframeList&);
std::unique_ptr<RenderStyle> pseudoStyleForElement(const Element&, const PseudoStyleRequest&, const RenderStyle& parentStyle, const SelectorFilter* = nullptr);
std::unique_ptr<RenderStyle> styleForPage(int pageIndex);
std::unique_ptr<RenderStyle> defaultStyleForElement();
RenderStyle* style() const { return m_state.style(); }
const RenderStyle* parentStyle() const { return m_state.parentStyle(); }
const RenderStyle* rootElementStyle() const { return m_state.rootElementStyle(); }
const Element* element() { return m_state.element(); }
Document& document() { return m_document; }
const Document& document() const { return m_document; }
const Settings& settings() const { return m_document.settings(); }
void appendAuthorStyleSheets(const Vector<RefPtr<CSSStyleSheet>>&);
DocumentRuleSets& ruleSets() { return m_ruleSets; }
const DocumentRuleSets& ruleSets() const { return m_ruleSets; }
const MediaQueryEvaluator& mediaQueryEvaluator() const { return m_mediaQueryEvaluator; }
RenderStyle* overrideDocumentElementStyle() const { return m_overrideDocumentElementStyle; }
void setOverrideDocumentElementStyle(RenderStyle* style) { m_overrideDocumentElementStyle = style; }
void addCurrentSVGFontFaceRules();
static void adjustSVGElementStyle(const SVGElement&, RenderStyle&);
void setNewStateWithElement(const Element&);
std::unique_ptr<RenderStyle> styleForKeyframe(const RenderStyle*, const StyleRuleKeyframe*, KeyframeValue&);
bool isAnimationNameValid(const String&);
public:
// 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<StyleRule>> styleRulesForElement(const Element*, unsigned rulesToInclude = AllButEmptyCSSRules);
Vector<RefPtr<StyleRule>> pseudoStyleRulesForElement(const Element*, PseudoId, unsigned rulesToInclude = AllButEmptyCSSRules);
public:
struct MatchResult;
void applyPropertyToStyle(CSSPropertyID, CSSValue*, std::unique_ptr<RenderStyle>);
void applyPropertyToCurrentStyle(CSSPropertyID, CSSValue*);
void updateFont();
void initializeFontStyle();
void setFontSize(FontCascadeDescription&, float size);
public:
bool useSVGZoomRules() const;
bool useSVGZoomRulesForLength() const;
static bool colorFromPrimitiveValueIsDerivedFromElement(const CSSPrimitiveValue&);
Color colorFromPrimitiveValue(const CSSPrimitiveValue&, bool forVisitedLink = false) const;
bool hasSelectorForId(const AtomicString&) const;
bool hasSelectorForAttribute(const Element&, const AtomicString&) const;
#if ENABLE(CSS_DEVICE_ADAPTATION)
ViewportStyleResolver* viewportStyleResolver() { return m_viewportStyleResolver.get(); }
#endif
void addViewportDependentMediaQueryResult(const MediaQueryExpression&, bool result);
bool hasViewportDependentMediaQueries() const { return !m_viewportDependentMediaQueryResults.isEmpty(); }
bool hasMediaQueriesAffectedByViewportChange() const;
void addAccessibilitySettingsDependentMediaQueryResult(const MediaQueryExpression&, bool result);
bool hasAccessibilitySettingsDependentMediaQueries() const { return !m_accessibilitySettingsDependentMediaQueryResults.isEmpty(); }
bool hasMediaQueriesAffectedByAccessibilitySettingsChange() const;
void addAppearanceDependentMediaQueryResult(const MediaQueryExpression&, bool result);
bool hasAppearanceDependentMediaQueries() const { return !m_appearanceDependentMediaQueryResults.isEmpty(); }
bool hasMediaQueriesAffectedByAppearanceChange() const;
void addKeyframeStyle(Ref<StyleRuleKeyframes>&&);
bool usesFirstLineRules() const { return m_ruleSets.features().usesFirstLineRules; }
bool usesFirstLetterRules() const { return m_ruleSets.features().usesFirstLetterRules; }
void invalidateMatchedPropertiesCache();
void clearCachedPropertiesAffectedByViewportUnits();
bool createFilterOperations(const CSSValue& inValue, FilterOperations& outOperations);
struct RuleRange {
RuleRange(int& firstRuleIndex, int& lastRuleIndex): firstRuleIndex(firstRuleIndex), lastRuleIndex(lastRuleIndex) { }
int& firstRuleIndex;
int& lastRuleIndex;
};
struct MatchRanges {
MatchRanges() : firstUARule(-1), lastUARule(-1), firstAuthorRule(-1), lastAuthorRule(-1), firstUserRule(-1), lastUserRule(-1) { }
int firstUARule;
int lastUARule;
int firstAuthorRule;
int lastAuthorRule;
int firstUserRule;
int lastUserRule;
RuleRange UARuleRange() { return RuleRange(firstUARule, lastUARule); }
RuleRange authorRuleRange() { return RuleRange(firstAuthorRule, lastAuthorRule); }
RuleRange userRuleRange() { return RuleRange(firstUserRule, lastUserRule); }
};
struct MatchedProperties {
MatchedProperties();
~MatchedProperties();
RefPtr<StyleProperties> properties;
uint16_t linkMatchType;
uint16_t whitelistType;
Style::ScopeOrdinal styleScopeOrdinal;
};
struct MatchResult {
MatchResult() : isCacheable(true) { }
Vector<StyleRule*, 64> matchedRules;
MatchRanges ranges;
bool isCacheable;
const Vector<MatchedProperties, 64>& matchedProperties() const { return m_matchedProperties; }
void addMatchedProperties(const StyleProperties&, StyleRule* = nullptr, unsigned linkMatchType = SelectorChecker::MatchAll, PropertyWhitelistType = PropertyWhitelistNone, Style::ScopeOrdinal = Style::ScopeOrdinal::Element);
private:
Vector<MatchedProperties, 64> m_matchedProperties;
};
class CascadedProperties {
WTF_MAKE_FAST_ALLOCATED;
public:
CascadedProperties(TextDirection, WritingMode);
struct Property {
void apply(StyleResolver&, ApplyCascadedPropertyState&);
CSSPropertyID id;
CascadeLevel level;
Style::ScopeOrdinal styleScopeOrdinal;
CSSValue* cssValue[3];
};
bool hasProperty(CSSPropertyID) const;
Property& property(CSSPropertyID);
void addNormalMatches(const MatchResult&, int startIndex, int endIndex, bool inheritedOnly = false);
void addImportantMatches(const MatchResult&, int startIndex, int endIndex, bool inheritedOnly = false);
void applyDeferredProperties(StyleResolver&, ApplyCascadedPropertyState&);
HashMap<AtomicString, Property>& customProperties() { return m_customProperties; }
bool hasCustomProperty(const String&) const;
Property customProperty(const String&) const;
private:
void addMatch(const MatchResult&, unsigned index, bool isImportant, bool inheritedOnly);
void set(CSSPropertyID, CSSValue&, unsigned linkMatchType, CascadeLevel, Style::ScopeOrdinal);
void setDeferred(CSSPropertyID, CSSValue&, unsigned linkMatchType, CascadeLevel, Style::ScopeOrdinal);
static void setPropertyInternal(Property&, CSSPropertyID, CSSValue&, unsigned linkMatchType, CascadeLevel, Style::ScopeOrdinal);
Property m_properties[numCSSProperties + 2];
std::bitset<numCSSProperties + 2> m_propertyIsPresent;
Vector<Property, 8> m_deferredProperties;
HashMap<AtomicString, Property> m_customProperties;
TextDirection m_direction;
WritingMode m_writingMode;
};
void applyCascadedProperties(int firstProperty, int lastProperty, ApplyCascadedPropertyState&);
void applyCascadedCustomProperty(const String& name, ApplyCascadedPropertyState&);
private:
// This function fixes up the default font size if it detects that the current generic font family has changed. -dwh
void checkForGenericFamilyChange(RenderStyle*, const RenderStyle* parentStyle);
void checkForZoomChange(RenderStyle*, const RenderStyle* parentStyle);
#if ENABLE(TEXT_AUTOSIZING)
void checkForTextSizeAdjust(RenderStyle*);
#endif
void adjustRenderStyle(RenderStyle&, const RenderStyle& parentStyle, const RenderStyle* parentBoxStyle, const Element*);
void adjustRenderStyleForSiteSpecificQuirks(RenderStyle&, const Element&);
std::unique_ptr<GridPosition> adjustNamedGridItemPosition(const NamedGridAreaMap&, const NamedGridLinesMap&, const GridPosition&, GridPositionSide) const;
void adjustStyleForInterCharacterRuby();
bool fastRejectSelector(const RuleData&) const;
enum ShouldUseMatchedPropertiesCache { DoNotUseMatchedPropertiesCache = 0, UseMatchedPropertiesCache };
void applyMatchedProperties(const MatchResult&, const Element&, ShouldUseMatchedPropertiesCache = UseMatchedPropertiesCache);
enum CustomPropertyCycleTracking { Enabled = 0, Disabled };
template<CustomPropertyCycleTracking>
inline void applyCascadedPropertiesImpl(int firstProperty, int lastProperty, ApplyCascadedPropertyState&);
void cascadeMatches(CascadedProperties&, const MatchResult&, bool important, int startIndex, int endIndex, bool inheritedOnly);
void matchPageRules(MatchResult&, RuleSet*, bool isLeftPage, bool isFirstPage, const String& pageName);
void matchPageRulesForList(Vector<StyleRulePage*>& matchedRules, const Vector<StyleRulePage*>&, bool isLeftPage, bool isFirstPage, const String& pageName);
bool isLeftPage(int pageIndex) const;
bool isRightPage(int pageIndex) const { return !isLeftPage(pageIndex); }
bool isFirstPage(int pageIndex) const;
String pageName(int pageIndex) const;
DocumentRuleSets m_ruleSets;
typedef HashMap<AtomicStringImpl*, RefPtr<StyleRuleKeyframes>> KeyframesRuleMap;
KeyframesRuleMap m_keyframesRuleMap;
public:
typedef HashMap<CSSPropertyID, RefPtr<CSSValue>> PendingImagePropertyMap;
class State {
public:
State() { }
State(const Element&, const RenderStyle* parentStyle, const RenderStyle* documentElementStyle = nullptr, const SelectorFilter* = nullptr);
public:
void clear();
const Element* element() const { return m_element; }
void setStyle(std::unique_ptr<RenderStyle>);
RenderStyle* style() const { return m_style.get(); }
std::unique_ptr<RenderStyle> takeStyle() { return WTFMove(m_style); }
void setParentStyle(std::unique_ptr<RenderStyle>);
const RenderStyle* parentStyle() const { return m_parentStyle; }
const RenderStyle* rootElementStyle() const { return m_rootElementStyle; }
InsideLink elementLinkState() const { return m_elementLinkState; }
void setApplyPropertyToRegularStyle(bool isApply) { m_applyPropertyToRegularStyle = isApply; }
void setApplyPropertyToVisitedLinkStyle(bool isApply) { m_applyPropertyToVisitedLinkStyle = isApply; }
bool applyPropertyToRegularStyle() const { return m_applyPropertyToRegularStyle; }
bool applyPropertyToVisitedLinkStyle() const { return m_applyPropertyToVisitedLinkStyle; }
void setFontDirty(bool isDirty) { m_fontDirty = isDirty; }
bool fontDirty() const { return m_fontDirty; }
void setFontSizeHasViewportUnits(bool hasViewportUnits) { m_fontSizeHasViewportUnits = hasViewportUnits; }
bool fontSizeHasViewportUnits() const { return m_fontSizeHasViewportUnits; }
void cacheBorderAndBackground();
bool hasUAAppearance() const { return m_hasUAAppearance; }
BorderData borderData() const { return m_borderData; }
FillLayer backgroundData() const { return m_backgroundData; }
const Color& backgroundColor() const { return m_backgroundColor; }
const FontCascadeDescription& fontDescription() { return m_style->fontDescription(); }
const FontCascadeDescription& parentFontDescription() { return m_parentStyle->fontDescription(); }
void setFontDescription(FontCascadeDescription&& fontDescription) { m_fontDirty |= m_style->setFontDescription(WTFMove(fontDescription)); }
void setZoom(float f) { m_fontDirty |= m_style->setZoom(f); }
void setEffectiveZoom(float f) { m_fontDirty |= m_style->setEffectiveZoom(f); }
void setWritingMode(WritingMode writingMode) { m_fontDirty |= m_style->setWritingMode(writingMode); }
void setTextOrientation(TextOrientation textOrientation) { m_fontDirty |= m_style->setTextOrientation(textOrientation); }
bool useSVGZoomRules() const { return m_element && m_element->isSVGElement(); }
const CSSToLengthConversionData& cssToLengthConversionData() const { return m_cssToLengthConversionData; }
CascadeLevel cascadeLevel() const { return m_cascadeLevel; }
void setCascadeLevel(CascadeLevel level) { m_cascadeLevel = level; }
Style::ScopeOrdinal styleScopeOrdinal() const { return m_styleScopeOrdinal; }
void setStyleScopeOrdinal(Style::ScopeOrdinal styleScopeOrdinal) { m_styleScopeOrdinal = styleScopeOrdinal; }
CascadedProperties* authorRollback() const { return m_authorRollback.get(); }
CascadedProperties* userRollback() const { return m_userRollback.get(); }
void setAuthorRollback(std::unique_ptr<CascadedProperties>& rollback) { m_authorRollback = WTFMove(rollback); }
void setUserRollback(std::unique_ptr<CascadedProperties>& rollback) { m_userRollback = WTFMove(rollback); }
const SelectorFilter* selectorFilter() const { return m_selectorFilter; }
private:
void updateConversionData();
const Element* m_element { nullptr };
std::unique_ptr<RenderStyle> m_style;
const RenderStyle* m_parentStyle { nullptr };
std::unique_ptr<RenderStyle> m_ownedParentStyle;
const RenderStyle* m_rootElementStyle { nullptr };
std::unique_ptr<CascadedProperties> m_authorRollback;
std::unique_ptr<CascadedProperties> m_userRollback;
const SelectorFilter* m_selectorFilter { nullptr };
BorderData m_borderData;
FillLayer m_backgroundData { FillLayerType::Background };
Color m_backgroundColor;
CSSToLengthConversionData m_cssToLengthConversionData;
Style::ScopeOrdinal m_styleScopeOrdinal { Style::ScopeOrdinal::Element };
InsideLink m_elementLinkState { InsideLink::NotInside };
CascadeLevel m_cascadeLevel { CascadeLevel::UserAgentLevel };
bool m_applyPropertyToRegularStyle { true };
bool m_applyPropertyToVisitedLinkStyle { false };
bool m_fontDirty { false };
bool m_fontSizeHasViewportUnits { false };
bool m_hasUAAppearance { false };
};
State& state() { return m_state; }
const State& state() const { return m_state; }
RefPtr<StyleImage> styleImage(CSSValue&);
bool applyPropertyToRegularStyle() const { return m_state.applyPropertyToRegularStyle(); }
bool applyPropertyToVisitedLinkStyle() const { return m_state.applyPropertyToVisitedLinkStyle(); }
CascadeLevel cascadeLevel() const { return m_state.cascadeLevel(); }
void setCascadeLevel(CascadeLevel level) { m_state.setCascadeLevel(level); }
CascadedProperties* cascadedPropertiesForRollback(const MatchResult&);
CSSToStyleMap* styleMap() { return &m_styleMap; }
InspectorCSSOMWrappers& inspectorCSSOMWrappers() { return m_inspectorCSSOMWrappers; }
const FontCascadeDescription& fontDescription() { return m_state.fontDescription(); }
const FontCascadeDescription& parentFontDescription() { return m_state.parentFontDescription(); }
void setFontDescription(FontCascadeDescription&& fontDescription) { m_state.setFontDescription(WTFMove(fontDescription)); }
void setZoom(float f) { m_state.setZoom(f); }
void setEffectiveZoom(float f) { m_state.setEffectiveZoom(f); }
void setWritingMode(WritingMode writingMode) { m_state.setWritingMode(writingMode); }
void setTextOrientation(TextOrientation textOrientation) { m_state.setTextOrientation(textOrientation); }
RefPtr<CSSValue> resolvedVariableValue(CSSPropertyID, const CSSValue&, ApplyCascadedPropertyState&) const;
private:
void cacheBorderAndBackground();
void applyProperty(CSSPropertyID, CSSValue*, ApplyCascadedPropertyState&, SelectorChecker::LinkMatchMask = SelectorChecker::MatchDefault);
void applySVGProperty(CSSPropertyID, CSSValue*);
static unsigned computeMatchedPropertiesHash(const MatchedProperties*, unsigned size);
struct MatchedPropertiesCacheItem {
Vector<MatchedProperties> matchedProperties;
MatchRanges ranges;
std::unique_ptr<RenderStyle> renderStyle;
std::unique_ptr<RenderStyle> parentRenderStyle;
MatchedPropertiesCacheItem(const MatchResult& matchResult, const RenderStyle* style, const RenderStyle* parentStyle)
: ranges(matchResult.ranges)
, renderStyle(RenderStyle::clonePtr(*style))
, parentRenderStyle(RenderStyle::clonePtr(*parentStyle))
{
// Assign rather than copy-construct so we only allocate as much vector capacity as needed.
matchedProperties = matchResult.matchedProperties();
}
MatchedPropertiesCacheItem() = default;
};
const MatchedPropertiesCacheItem* findFromMatchedPropertiesCache(unsigned hash, const MatchResult&);
void addToMatchedPropertiesCache(const RenderStyle*, const RenderStyle* parentStyle, unsigned hash, const MatchResult&);
// Every N additions to the matched declaration cache trigger a sweep where entries holding
// the last reference to a style declaration are garbage collected.
void sweepMatchedPropertiesCache();
void adjustRenderStyleForTextAutosizing(RenderStyle&, const Element&);
typedef HashMap<unsigned, MatchedPropertiesCacheItem> MatchedPropertiesCache;
MatchedPropertiesCache m_matchedPropertiesCache;
Timer m_matchedPropertiesCacheSweepTimer;
MediaQueryEvaluator m_mediaQueryEvaluator;
std::unique_ptr<RenderStyle> m_rootDefaultStyle;
Document& m_document;
RenderStyle* m_overrideDocumentElementStyle { nullptr };
Vector<MediaQueryResult> m_viewportDependentMediaQueryResults;
Vector<MediaQueryResult> m_accessibilitySettingsDependentMediaQueryResults;
Vector<MediaQueryResult> m_appearanceDependentMediaQueryResults;
#if ENABLE(CSS_DEVICE_ADAPTATION)
RefPtr<ViewportStyleResolver> m_viewportStyleResolver;
#endif
CSSToStyleMap m_styleMap;
InspectorCSSOMWrappers m_inspectorCSSOMWrappers;
State m_state;
unsigned m_matchedPropertiesCacheAdditionsSinceLastSweep { 0 };
bool m_matchAuthorAndUserStyles { true };
// See if we still have crashes where StyleResolver gets deleted early.
bool m_isDeleted { false };
friend bool operator==(const MatchedProperties&, const MatchedProperties&);
friend bool operator!=(const MatchedProperties&, const MatchedProperties&);
friend bool operator==(const MatchRanges&, const MatchRanges&);
friend bool operator!=(const MatchRanges&, const MatchRanges&);
};
// State to use when applying properties, to keep track of which custom and high-priority
// properties have been resolved.
struct ApplyCascadedPropertyState {
StyleResolver* styleResolver;
StyleResolver::CascadedProperties* cascade;
const StyleResolver::MatchResult* matchResult;
Bitmap<numCSSProperties> appliedProperties = { };
HashSet<String> appliedCustomProperties = { };
Bitmap<numCSSProperties> inProgressProperties = { };
HashSet<String> inProgressPropertiesCustom = { };
};
inline bool StyleResolver::hasSelectorForAttribute(const Element& element, const AtomicString &attributeName) const
{
ASSERT(!attributeName.isEmpty());
if (element.isHTMLElement())
return m_ruleSets.features().attributeCanonicalLocalNamesInRules.contains(attributeName);
return m_ruleSets.features().attributeLocalNamesInRules.contains(attributeName);
}
inline bool StyleResolver::hasSelectorForId(const AtomicString& idValue) const
{
ASSERT(!idValue.isEmpty());
return m_ruleSets.features().idsInRules.contains(idValue);
}
} // namespace WebCore