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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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.
*
*/
#ifndef RuleFeature_h
#define RuleFeature_h
#include "core/css/CSSSelector.h"
#include "core/css/invalidation/StyleInvalidator.h"
#include "wtf/Forward.h"
#include "wtf/HashSet.h"
#include "wtf/text/AtomicStringHash.h"
namespace blink {
class DescendantInvalidationSet;
class QualifiedName;
class RuleData;
class SpaceSplitString;
class StyleRule;
struct RuleFeature {
ALLOW_ONLY_INLINE_ALLOCATION();
public:
RuleFeature(StyleRule* rule, unsigned selectorIndex, bool hasDocumentSecurityOrigin);
void trace(Visitor*);
RawPtrWillBeMember<StyleRule> rule;
unsigned selectorIndex;
bool hasDocumentSecurityOrigin;
};
class RuleFeatureSet {
DISALLOW_ALLOCATION();
public:
RuleFeatureSet();
~RuleFeatureSet();
void add(const RuleFeatureSet&);
void clear();
void collectFeaturesFromRuleData(const RuleData&);
bool usesSiblingRules() const { return !siblingRules.isEmpty(); }
bool usesFirstLineRules() const { return m_metadata.usesFirstLineRules; }
unsigned maxDirectAdjacentSelectors() const { return m_metadata.maxDirectAdjacentSelectors; }
void setMaxDirectAdjacentSelectors(unsigned value) { m_metadata.maxDirectAdjacentSelectors = std::max(value, m_metadata.maxDirectAdjacentSelectors); }
bool hasSelectorForAttribute(const AtomicString& attributeName) const
{
ASSERT(!attributeName.isEmpty());
return m_attributeInvalidationSets.contains(attributeName);
}
bool hasSelectorForClass(const AtomicString& classValue) const
{
ASSERT(!classValue.isEmpty());
return m_classInvalidationSets.contains(classValue);
}
bool hasSelectorForId(const AtomicString& idValue) const { return m_idInvalidationSets.contains(idValue); }
bool hasSelectorForPseudoType(CSSSelector::PseudoType pseudo) const { return m_pseudoInvalidationSets.contains(pseudo); }
void scheduleStyleInvalidationForClassChange(const SpaceSplitString& changedClasses, Element&);
void scheduleStyleInvalidationForClassChange(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses, Element&);
void scheduleStyleInvalidationForAttributeChange(const QualifiedName& attributeName, Element&);
void scheduleStyleInvalidationForIdChange(const AtomicString& oldId, const AtomicString& newId, Element&);
void scheduleStyleInvalidationForPseudoChange(CSSSelector::PseudoType, Element&);
bool hasIdsInSelectors() const
{
return m_idInvalidationSets.size() > 0;
}
StyleInvalidator& styleInvalidator();
void trace(Visitor*);
WillBeHeapVector<RuleFeature> siblingRules;
WillBeHeapVector<RuleFeature> uncommonAttributeRules;
protected:
DescendantInvalidationSet* invalidationSetForSelector(const CSSSelector&);
private:
typedef WillBeHeapHashMap<AtomicString, RefPtrWillBeMember<DescendantInvalidationSet> > InvalidationSetMap;
typedef WillBeHeapHashMap<CSSSelector::PseudoType, RefPtrWillBeMember<DescendantInvalidationSet>, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned> > PseudoTypeInvalidationSetMap;
struct FeatureMetadata {
FeatureMetadata()
: usesFirstLineRules(false)
, foundSiblingSelector(false)
, maxDirectAdjacentSelectors(0)
{ }
void add(const FeatureMetadata& other);
void clear();
bool usesFirstLineRules;
bool foundSiblingSelector;
unsigned maxDirectAdjacentSelectors;
};
void collectFeaturesFromSelector(const CSSSelector&, FeatureMetadata&);
DescendantInvalidationSet& ensureClassInvalidationSet(const AtomicString& className);
DescendantInvalidationSet& ensureAttributeInvalidationSet(const AtomicString& attributeName);
DescendantInvalidationSet& ensureIdInvalidationSet(const AtomicString& attributeName);
DescendantInvalidationSet& ensurePseudoInvalidationSet(CSSSelector::PseudoType);
void updateInvalidationSets(const RuleData&);
void updateInvalidationSetsForContentAttribute(const RuleData&);
struct InvalidationSetFeatures {
InvalidationSetFeatures()
: customPseudoElement(false)
, hasBeforeOrAfter(false)
, treeBoundaryCrossing(false)
, adjacent(false)
, insertionPointCrossing(false)
, forceSubtree(false)
{ }
bool useSubtreeInvalidation() const { return forceSubtree || adjacent; }
Vector<AtomicString> classes;
Vector<AtomicString> attributes;
AtomicString id;
AtomicString tagName;
bool customPseudoElement;
bool hasBeforeOrAfter;
bool treeBoundaryCrossing;
bool adjacent;
bool insertionPointCrossing;
bool forceSubtree;
};
static bool extractInvalidationSetFeature(const CSSSelector&, InvalidationSetFeatures&);
enum UseFeaturesType { UseFeatures, ForceSubtree };
std::pair<const CSSSelector*, UseFeaturesType> extractInvalidationSetFeatures(const CSSSelector&, InvalidationSetFeatures&, bool negated);
void addFeaturesToInvalidationSet(DescendantInvalidationSet&, const InvalidationSetFeatures&);
void addFeaturesToInvalidationSets(const CSSSelector&, InvalidationSetFeatures&);
void addClassToInvalidationSet(const AtomicString& className, Element&);
FeatureMetadata m_metadata;
InvalidationSetMap m_classInvalidationSets;
InvalidationSetMap m_attributeInvalidationSets;
InvalidationSetMap m_idInvalidationSets;
PseudoTypeInvalidationSetMap m_pseudoInvalidationSets;
StyleInvalidator m_styleInvalidator;
};
} // namespace blink
#endif // RuleFeature_h
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