Use invalidation sets for :hover, :active, and :focus.

Source/core/css/RuleFeature.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 161 matching lines @@
 }
 
 DescendantInvalidationSet* RuleFeatureSet::invalidationSetForSelector(const CSSSelector& selector)
 {
     if (selector.m_match == CSSSelector::Class)
         return &ensureClassInvalidationSet(selector.value());
     if (selector.isAttributeSelector())
         return &ensureAttributeInvalidationSet(selector.attribute().localName());
     if (selector.m_match == CSSSelector::Id)
         return &ensureIdInvalidationSet(selector.value());
+    if (selector.m_match == CSSSelector::PseudoClass) {
+        CSSSelector::PseudoType pseudo = selector.pseudoType();
+        if (pseudo == CSSSelector::PseudoHover || pseudo == CSSSelector::PseudoActive || pseudo == CSSSelector::PseudoFocus)
+            return &ensurePseudoInvalidationSet(pseudo);
+    }
     return 0;
 }
 
 RuleFeatureSet::InvalidationSetMode RuleFeatureSet::updateInvalidationSets(const CSSSelector& selector)
 {
     InvalidationSetMode mode = invalidationSetModeForSelector(selector);
     if (mode != AddFeatures)
         return mode;
 
     InvalidationSetFeatures features;
@@ skipping 111 matching lines @@
 }
 
 DescendantInvalidationSet& RuleFeatureSet::ensureIdInvalidationSet(const AtomicString& id)
 {
     InvalidationSetMap::AddResult addResult = m_idInvalidationSets.add(id, nullptr);
     if (addResult.isNewEntry)
         addResult.storedValue->value = DescendantInvalidationSet::create();
     return *addResult.storedValue->value;
 }
 
+DescendantInvalidationSet& RuleFeatureSet::ensurePseudoInvalidationSet(CSSSelector::PseudoType pseudoType)
+{
+    PseudoTypeInvalidationSetMap::AddResult addResult = m_pseudoInvalidationSets.add(pseudoType, nullptr);
+    if (addResult.isNewEntry)
+        addResult.storedValue->value = DescendantInvalidationSet::create();
+    return *addResult.storedValue->value;
+}
+
 void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector)
 {
     collectFeaturesFromSelector(selector, m_metadata, UseSubtreeStyleChange);
 }
 
 void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector, RuleFeatureSet::FeatureMetadata& metadata, InvalidationSetMode mode)
 {
     unsigned maxDirectAdjacentSelectors = 0;
 
     for (const CSSSelector* current = &selector; current; current = current->tagHistory()) {
-        if (mode != AddFeatures && (current->m_match == CSSSelector::Class || current->m_match == CSSSelector::Id || current->isAttributeSelector())) {
-            DescendantInvalidationSet* invalidationSet = invalidationSetForSelector(*current);
-            ASSERT(invalidationSet);
-            if (mode == UseSubtreeStyleChange)
-                invalidationSet->setWholeSubtreeInvalid();
+        if (mode != AddFeatures) {
+            if (DescendantInvalidationSet* invalidationSet = invalidationSetForSelector(*current)) {
+                if (mode == UseSubtreeStyleChange)
+                    invalidationSet->setWholeSubtreeInvalid();
+            }
         }
         if (current->pseudoType() == CSSSelector::PseudoFirstLine)
             metadata.usesFirstLineRules = true;
         if (current->isDirectAdjacentSelector()) {
             maxDirectAdjacentSelectors++;
         } else if (maxDirectAdjacentSelectors) {
             if (maxDirectAdjacentSelectors > metadata.maxDirectAdjacentSelectors)
                 metadata.maxDirectAdjacentSelectors = maxDirectAdjacentSelectors;
             maxDirectAdjacentSelectors = 0;
         }
@@ skipping 32 matching lines @@
 }
 
 void RuleFeatureSet::add(const RuleFeatureSet& other)
 {
     for (InvalidationSetMap::const_iterator it = other.m_classInvalidationSets.begin(); it != other.m_classInvalidationSets.end(); ++it)
         ensureClassInvalidationSet(it->key).combine(*it->value);
     for (InvalidationSetMap::const_iterator it = other.m_attributeInvalidationSets.begin(); it != other.m_attributeInvalidationSets.end(); ++it)
         ensureAttributeInvalidationSet(it->key).combine(*it->value);
     for (InvalidationSetMap::const_iterator it = other.m_idInvalidationSets.begin(); it != other.m_idInvalidationSets.end(); ++it)
         ensureIdInvalidationSet(it->key).combine(*it->value);
+    for (PseudoTypeInvalidationSetMap::const_iterator it = other.m_pseudoInvalidationSets.begin(); it != other.m_pseudoInvalidationSets.end(); ++it)
+        ensurePseudoInvalidationSet(static_cast<CSSSelector::PseudoType>(it->key)).combine(*it->value);
 
     m_metadata.add(other.m_metadata);
 
     siblingRules.appendVector(other.siblingRules);
     uncommonAttributeRules.appendVector(other.uncommonAttributeRules);
 }
 
 void RuleFeatureSet::clear()
 {
     siblingRules.clear();
@@ skipping 60 matching lines @@
     if (!oldId.isEmpty()) {
         if (RefPtr<DescendantInvalidationSet> invalidationSet = m_idInvalidationSets.get(oldId))
             m_styleInvalidator.scheduleInvalidation(invalidationSet, element);
     }
     if (!newId.isEmpty()) {
         if (RefPtr<DescendantInvalidationSet> invalidationSet = m_idInvalidationSets.get(newId))
             m_styleInvalidator.scheduleInvalidation(invalidationSet, element);
     }
 }
 
+void RuleFeatureSet::scheduleStyleInvalidationForPseudoChange(CSSSelector::PseudoType pseudo, Element& element)
+{
+    if (RefPtr<DescendantInvalidationSet> invalidationSet = m_pseudoInvalidationSets.get(pseudo))
+        m_styleInvalidator.scheduleInvalidation(invalidationSet, element);
+}
+
 void RuleFeatureSet::addClassToInvalidationSet(const AtomicString& className, Element& element)
 {
     if (RefPtr<DescendantInvalidationSet> invalidationSet = m_classInvalidationSets.get(className))
         m_styleInvalidator.scheduleInvalidation(invalidationSet, element);
 }
 
 StyleInvalidator& RuleFeatureSet::styleInvalidator()
 {
     return m_styleInvalidator;
 }
 
 } // namespace WebCore