Introduce isHTMLOptGroupElement and toHTMLOptGroupElement

Source/core/html/HTMLOptionElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Motorola Mobility, Inc.  All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 16 matching lines @@
 #include "config.h"
 #include "core/html/HTMLOptionElement.h"
 
 #include "HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/ScriptLoader.h"
 #include "core/dom/Text.h"
 #include "core/html/HTMLDataListElement.h"
+#include "core/html/HTMLOptGroupElement.h"
 #include "core/html/HTMLSelectElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/rendering/RenderTheme.h"
 #include "wtf/Vector.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
@@ skipping 279 matching lines @@
     // style is exactly the same.
     if (HTMLSelectElement* select = ownerSelectElement()) {
         if (RenderObject* renderer = select->renderer())
             renderer->repaint();
     }
 }
 
 String HTMLOptionElement::textIndentedToRespectGroupLabel() const
 {
     ContainerNode* parent = parentNode();
-    if (parent && parent->hasTagName(optgroupTag))
+    if (parent && isHTMLOptGroupElement(parent))
         return "    " + text();
     return text();
 }
 
 bool HTMLOptionElement::isDisabledFormControl() const
 {
     if (ownElementDisabled())
         return true;
     if (Element* parent = parentElement())
-        return parent->hasTagName(optgroupTag) && parent->isDisabledFormControl();
+        return isHTMLOptGroupElement(parent) && parent->isDisabledFormControl();
     return false;
 }
 
 Node::InsertionNotificationRequest HTMLOptionElement::insertedInto(ContainerNode* insertionPoint)
 {
     if (HTMLSelectElement* select = ownerSelectElement()) {
         select->setRecalcListItems();
         // Do not call selected() since calling updateListItemSelectedStates()
         // at this time won't do the right thing. (Why, exactly?)
         // FIXME: Might be better to call this unconditionally, always passing m_isSelected,
@@ skipping 15 matching lines @@
         // Text nodes inside script elements are not part of the option text.
         if (node->isElementNode() && toScriptLoaderIfPossible(toElement(node)))
             node = NodeTraversal::nextSkippingChildren(node, this);
         else
             node = NodeTraversal::next(node, this);
     }
     return text.toString();
 }
 
 } // namespace WebCore