Store features in the ScopedStyleResoolver.

sky/engine/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 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
@@ skipping 145 matching lines @@
 
     virtual String nodeName() const override;
 
     PassRefPtr<Element> cloneElementWithChildren();
     PassRefPtr<Element> cloneElementWithoutChildren();
 
     void setBooleanAttribute(const QualifiedName& name, bool);
 
     void invalidateStyleAttribute();
 
+    bool affectedByAttributeSelector(const AtomicString& attributeName) const;
+    bool affectedByClassSelector(const AtomicString& classValue) const;
+    bool affectedByIdSelector(const AtomicString& idValue) const;
+
     const StylePropertySet* inlineStyle() const { return elementData() ? elementData()->m_inlineStyle.get() : 0; }
 
     bool setInlineStyleProperty(CSSPropertyID, CSSValueID identifier, bool important = false);
     bool setInlineStyleProperty(CSSPropertyID, double value, CSSPrimitiveValue::UnitType, bool important = false);
     bool setInlineStyleProperty(CSSPropertyID, const String& value, bool important = false);
     bool removeInlineStyleProperty(CSSPropertyID);
     void removeAllInlineStyleProperties();
 
     void synchronizeStyleAttributeInternal() const;
 
@@ skipping 144 matching lines @@
     virtual void setWasFocusedByMouse(bool) { }
 
     // classAttributeChanged() exists to share code between
     // parseAttribute (called via setAttribute()) and
     // svgAttributeChanged (called when element.className.baseValue is set)
     void classAttributeChanged(const AtomicString& newClassString);
 
 private:
     void attributeChanged(const QualifiedName&, const AtomicString&, AttributeModificationReason = ModifiedDirectly);
 
+    bool classChangeNeedsStyleRecalc(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses);
+
     bool hasElementFlag(ElementFlags mask) const { return hasRareData() && hasElementFlagInternal(mask); }
     void setElementFlag(ElementFlags, bool value = true);
     void clearElementFlag(ElementFlags);
     bool hasElementFlagInternal(ElementFlags) const;
 
     bool isElementNode() const = delete; // This will catch anyone doing an unnecessary check.
     bool isDocumentFragment() const = delete; // This will catch anyone doing an unnecessary check.
     bool isDocumentNode() const = delete; // This will catch anyone doing an unnecessary check.
 
     void styleAttributeChanged(const AtomicString& newStyleString);
@@ skipping 254 matching lines @@
     static PassRefPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRef(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif  // SKY_ENGINE_CORE_DOM_ELEMENT_H_