Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/css/RuleFeature.h

 /*
  * 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/CoreExport.h"
 #include "core/css/CSSSelector.h"
+#include "core/css/MediaQueryEvaluator.h"
 #include "core/css/invalidation/InvalidationSet.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/text/AtomicStringHash.h"
 
 namespace blink {
 
 struct InvalidationLists;
 class QualifiedName;
@@ skipping 31 matching lines @@
     void add(const RuleFeatureSet&);
     void clear();
 
     enum SelectorPreMatch { SelectorNeverMatches, SelectorMayMatch };
 
     SelectorPreMatch collectFeaturesFromRuleData(const RuleData&);
 
     bool usesSiblingRules() const { return !siblingRules.isEmpty(); }
     bool usesFirstLineRules() const { return m_metadata.usesFirstLineRules; }
     bool usesWindowInactiveSelector() const { return m_metadata.usesWindowInactiveSelector; }
+    bool needsFullRecalcForRuleSetInvalidation() const { return m_metadata.needsFullRecalcForRuleSetInvalidation; }
 
     unsigned maxDirectAdjacentSelectors() const { return m_metadata.maxDirectAdjacentSelectors; }
 
     bool hasSelectorForAttribute(const AtomicString& attributeName) const
     {
         ASSERT(!attributeName.isEmpty());
         return m_attributeInvalidationSets.contains(attributeName);
     }
 
     bool hasSelectorForClass(const AtomicString& classValue) const
@@ skipping 12 matching lines @@
 
     bool hasIdsInSelectors() const
     {
         return m_idInvalidationSets.size() > 0;
     }
 
     DECLARE_TRACE();
 
     HeapVector<RuleFeature> siblingRules;
     HeapVector<RuleFeature> uncommonAttributeRules;
+    MediaQueryResultList viewportDependentMediaQueryResults;
+    MediaQueryResultList deviceDependentMediaQueryResults;
 
 protected:
     InvalidationSet* invalidationSetForSelector(const CSSSelector&, InvalidationType);
 
 private:
     // Each map entry is either a DescendantInvalidationSet or SiblingInvalidationSet.
     // When both are needed, we store the SiblingInvalidationSet, and use it to hold the DescendantInvalidationSet.
     using InvalidationSetMap = HashMap<AtomicString, RefPtr<InvalidationSet>>;
     using PseudoTypeInvalidationSetMap = HashMap<CSSSelector::PseudoType, RefPtr<InvalidationSet>, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>>;
 
     struct FeatureMetadata {
         DISALLOW_NEW();
         void add(const FeatureMetadata& other);
         void clear();
 
         bool usesFirstLineRules = false;
         bool usesWindowInactiveSelector = false;
         bool foundSiblingSelector = false;
         bool foundInsertionPointCrossing = false;
+        bool needsFullRecalcForRuleSetInvalidation = false;
         unsigned maxDirectAdjacentSelectors = 0;
     };
 
     SelectorPreMatch collectFeaturesFromSelector(const CSSSelector&, FeatureMetadata&);
 
     InvalidationSet& ensureClassInvalidationSet(const AtomicString& className, InvalidationType);
     InvalidationSet& ensureAttributeInvalidationSet(const AtomicString& attributeName, InvalidationType);
     InvalidationSet& ensureIdInvalidationSet(const AtomicString& id, InvalidationType);
     InvalidationSet& ensurePseudoInvalidationSet(CSSSelector::PseudoType, InvalidationType);
 
     void updateInvalidationSets(const RuleData&);
     void updateInvalidationSetsForContentAttribute(const RuleData&);
 
     struct InvalidationSetFeatures {
         DISALLOW_NEW();
 
         Vector<AtomicString> classes;
         Vector<AtomicString> attributes;
         AtomicString id;
         AtomicString tagName;
         unsigned maxDirectAdjacentSelectors = UINT_MAX;
         bool customPseudoElement = false;
         bool hasBeforeOrAfter = false;
         bool treeBoundaryCrossing = false;
         bool adjacent = false;
         bool insertionPointCrossing = false;
         bool forceSubtree = false;
         bool contentPseudoCrossing = false;
         bool invalidatesSlotted = false;
+        bool containsIdClassAttributeOrTypeInScope = false;
     };
 
     static bool extractInvalidationSetFeature(const CSSSelector&, InvalidationSetFeatures&);
 
     enum UseFeaturesType { UseFeatures, ForceSubtree };
 
     enum PositionType { Subject, Ancestor };
     std::pair<const CSSSelector*, UseFeaturesType> extractInvalidationSetFeatures(const CSSSelector&, InvalidationSetFeatures&, PositionType, CSSSelector::PseudoType = CSSSelector::PseudoUnknown);
 
     void addFeaturesToInvalidationSet(InvalidationSet&, const InvalidationSetFeatures&);
     void addFeaturesToInvalidationSets(const CSSSelector*, InvalidationSetFeatures* siblingFeatures, InvalidationSetFeatures& descendantFeatures);
 
     void addClassToInvalidationSet(const AtomicString& className, Element&);
 
     FeatureMetadata m_metadata;
     InvalidationSetMap m_classInvalidationSets;
     InvalidationSetMap m_attributeInvalidationSets;
     InvalidationSetMap m_idInvalidationSets;
     PseudoTypeInvalidationSetMap m_pseudoInvalidationSets;
 
     friend class RuleFeatureSetTest;
 };
 
 } // namespace blink
 
 #endif // RuleFeature_h