Introduce isHTMLHtmlElement and toHTMLHtmlElement

Source/core/dom/Position.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include <stdio.h>
 #include "HTMLNames.h"
 #include "core/css/CSSComputedStyleDeclaration.h"
 #include "core/dom/PositionIterator.h"
 #include "core/dom/Text.h"
 #include "core/editing/TextIterator.h"
 #include "core/editing/VisiblePosition.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
+#include "core/html/HTMLHtmlElement.h"
 #include "core/html/HTMLTableElement.h"
 #include "core/platform/Logging.h"
 #include "core/rendering/InlineIterator.h"
 #include "core/rendering/InlineTextBox.h"
 #include "core/rendering/RenderBlock.h"
 #include "core/rendering/RenderInline.h"
 #include "core/rendering/RenderText.h"
 #include "wtf/text/CString.h"
 #include "wtf/unicode/CharacterNames.h"
 
@@ skipping 847 matching lines @@
     if (renderer->isBR())
         // FIXME: The condition should be m_anchorType == PositionIsBeforeAnchor, but for now we still need to support legacy positions.
         return !m_offset && m_anchorType != PositionIsAfterAnchor && !nodeIsUserSelectNone(deprecatedNode()->parentNode());
 
     if (renderer->isText())
         return !nodeIsUserSelectNone(deprecatedNode()) && inRenderedText();
 
     if (isTableElement(deprecatedNode()) || editingIgnoresContent(deprecatedNode()))
         return (atFirstEditingPositionForNode() || atLastEditingPositionForNode()) && !nodeIsUserSelectNone(deprecatedNode()->parentNode());
 
-    if (m_anchorNode->hasTagName(htmlTag))
+    if (isHTMLHtmlElement(m_anchorNode.get()))
         return false;
 
     if (renderer->isBlockFlow()) {
         if (toRenderBlock(renderer)->logicalHeight() || m_anchorNode->hasTagName(bodyTag)) {
             if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(renderer))
                 return atFirstEditingPositionForNode() && !Position::nodeIsUserSelectNone(deprecatedNode());
             return m_anchorNode->rendererIsEditable() && !Position::nodeIsUserSelectNone(deprecatedNode()) && atEditingBoundary();
         }
     } else
         return m_anchorNode->rendererIsEditable() && !Position::nodeIsUserSelectNone(deprecatedNode()) && atEditingBoundary();
@@ skipping 475 matching lines @@
     pos.showTreeForThis();
 }
 
 void showTree(const WebCore::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
 }
 
 #endif