1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 */ 21 22 #ifndef RuleFeature_h 23 #define RuleFeature_h 24 25 #include "wtf/Forward.h" 26 #include "wtf/HashSet.h" 27 #include "wtf/text/AtomicStringHash.h" 28 29 namespace WebCore { 30 31 class StyleRule; 32 class CSSSelector; 33 class CSSSelectorList; 34 35 struct RuleFeature { RuleFeatureRuleFeature36 RuleFeature(StyleRule* rule, unsigned selectorIndex, bool hasDocumentSecurityOrigin) 37 : rule(rule) 38 , selectorIndex(selectorIndex) 39 , hasDocumentSecurityOrigin(hasDocumentSecurityOrigin) 40 { 41 } 42 StyleRule* rule; 43 unsigned selectorIndex; 44 bool hasDocumentSecurityOrigin; 45 }; 46 47 class RuleFeatureSet { 48 public: RuleFeatureSet()49 RuleFeatureSet() 50 : m_usesFirstLineRules(false) 51 , m_maxDirectAdjacentSelectors(0) 52 { } 53 54 void add(const RuleFeatureSet&); 55 void clear(); 56 57 void collectFeaturesFromSelector(const CSSSelector*); 58 usesSiblingRules()59 bool usesSiblingRules() const { return !siblingRules.isEmpty(); } usesFirstLineRules()60 bool usesFirstLineRules() const { return m_usesFirstLineRules; } 61 maxDirectAdjacentSelectors()62 unsigned maxDirectAdjacentSelectors() const { return m_maxDirectAdjacentSelectors; } setMaxDirectAdjacentSelectors(unsigned value)63 void setMaxDirectAdjacentSelectors(unsigned value) { m_maxDirectAdjacentSelectors = std::max(value, m_maxDirectAdjacentSelectors); } 64 hasSelectorForAttribute(const AtomicString & attributeName)65 inline bool hasSelectorForAttribute(const AtomicString& attributeName) const 66 { 67 ASSERT(!attributeName.isEmpty()); 68 return attrsInRules.contains(attributeName); 69 } 70 hasSelectorForClass(const AtomicString & classValue)71 inline bool hasSelectorForClass(const AtomicString& classValue) const 72 { 73 ASSERT(!classValue.isEmpty()); 74 return classesInRules.contains(classValue); 75 } 76 hasSelectorForId(const AtomicString & idValue)77 inline bool hasSelectorForId(const AtomicString& idValue) const 78 { 79 ASSERT(!idValue.isEmpty()); 80 return idsInRules.contains(idValue); 81 } 82 83 HashSet<AtomicString> idsInRules; 84 HashSet<AtomicString> classesInRules; 85 HashSet<AtomicString> attrsInRules; 86 Vector<RuleFeature> siblingRules; 87 Vector<RuleFeature> uncommonAttributeRules; 88 private: 89 void collectFeaturesFromSelectorList(const CSSSelectorList*); 90 91 bool m_usesFirstLineRules; 92 unsigned m_maxDirectAdjacentSelectors; 93 }; 94 95 } // namespace WebCore 96 97 #endif // RuleFeature_h 98