Add isTabStop attribute to Element

Source/core/dom/ElementRareData.h

 /*
  * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith <catfish.man@gmail.com>
  *
  * 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,
@@ skipping 39 matching lines @@
     ~ElementRareData();
 
     void setPseudoElement(PseudoId, PassRefPtrWillBeRawPtr<PseudoElement>);
     PseudoElement* pseudoElement(PseudoId) const;
 
     short tabIndex() const { return m_tabindex; }
 
     void setTabIndexExplicitly(short index)
     {
         m_tabindex = index;
+        // isTabStop is overridden by setting tabindex.
+        m_isTabStop = (m_tabindex >= 0);
         setElementFlag(TabIndexWasSetExplicitly, true);
     }
 
     void clearTabIndexExplicitly()
     {
         m_tabindex = 0;
+        m_isTabStop = true;
         clearElementFlag(TabIndexWasSetExplicitly);
     }
 
+    bool isTabStop() const { return m_isTabStop; }
+
+    void setIsTabStop(bool flag) { m_isTabStop = flag; }
+
     CSSStyleDeclaration& ensureInlineCSSStyleDeclaration(Element* ownerElement);
 
     void clearShadow() { m_shadow = nullptr; }
     ElementShadow* shadow() const { return m_shadow.get(); }
     ElementShadow& ensureShadow()
     {
         if (!m_shadow)
             m_shadow = ElementShadow::create();
         return *m_shadow;
     }
@@ skipping 44 matching lines @@
     CustomElementDefinition* customElementDefinition() const { return m_customElementDefinition.get(); }
 
     WillBeHeapVector<RefPtrWillBeMember<Attr> >& ensureAttrNodeList();
     WillBeHeapVector<RefPtrWillBeMember<Attr> >* attrNodeList() { return m_attrNodeList.get(); }
     void removeAttrNodeList() { m_attrNodeList.clear(); }
 
     void traceAfterDispatch(Visitor*);
 
 private:
     short m_tabindex;
+    bool m_isTabStop;
 
     LayoutSize m_minimumSizeForResizing;
     IntSize m_savedLayerScrollOffset;
 
     OwnPtrWillBeMember<DatasetDOMStringMap> m_dataset;
     OwnPtrWillBeMember<ClassList> m_classList;
     OwnPtrWillBeMember<ElementShadow> m_shadow;
     OwnPtrWillBeMember<NamedNodeMap> m_attributeMap;
     OwnPtrWillBeMember<WillBeHeapVector<RefPtrWillBeMember<Attr> > > m_attrNodeList;
     OwnPtrWillBeMember<InputMethodContext> m_inputMethodContext;
@@ skipping 12 matching lines @@
 };
 
 inline LayoutSize defaultMinimumSizeForResizing()
 {
     return LayoutSize(LayoutUnit::max(), LayoutUnit::max());
 }
 
 inline ElementRareData::ElementRareData(LayoutObject* renderer)
     : NodeRareData(renderer)
     , m_tabindex(0)
+    , m_isTabStop(true)
     , m_minimumSizeForResizing(defaultMinimumSizeForResizing())
 {
     m_isElementRareData = true;
 }
 
 inline ElementRareData::~ElementRareData()
 {
 #if !ENABLE(OILPAN)
     ASSERT(!m_shadow);
 #endif
@@ skipping 56 matching lines @@
     case FIRST_LETTER:
         return m_generatedFirstLetter.get();
     default:
         return 0;
     }
 }
 
 } // namespace
 
 #endif // ElementRareData_h