Introduce isHTMLHtmlElement and toHTMLHtmlElement

Source/core/page/TouchDisambiguation.cpp

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #include "config.h"
 
 #include "core/page/TouchDisambiguation.h"
 
 #include <algorithm>
 #include <cmath>
 #include "HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/NodeTraversal.h"
+#include "core/html/HTMLHtmlElement.h"
 #include "core/page/EventHandler.h"
 #include "core/page/Frame.h"
 #include "core/page/FrameView.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/RenderBlock.h"
 
 using namespace std;
 
 namespace WebCore {
 
@@ skipping 67 matching lines @@
                 break;
         }
     }
 
     HashMap<Node*, TouchTargetData> touchTargets;
     float bestScore = 0;
     for (ListHashSet<RefPtr<Node> >::const_iterator it = hitResults.begin(); it != hitResults.end(); ++it) {
         for (Node* node = it->get(); node; node = node->parentNode()) {
             if (blackList.contains(node))
                 continue;
-            if (node->isDocumentNode() || node->hasTagName(HTMLNames::htmlTag) || node->hasTagName(HTMLNames::bodyTag))
+            if (node->isDocumentNode() || isHTMLHtmlElement(node) || node->hasTagName(HTMLNames::bodyTag))
                 break;
             if (node->willRespondToMouseClickEvents()) {
                 TouchTargetData& targetData = touchTargets.add(node, TouchTargetData()).iterator->value;
                 targetData.windowBoundingBox = boundingBoxForEventNodes(node);
                 targetData.score = scoreTouchTarget(touchPoint, touchPointPadding, targetData.windowBoundingBox);
                 bestScore = max(bestScore, targetData.score);
                 break;
             }
         }
     }
 
     for (HashMap<Node*, TouchTargetData>::iterator it = touchTargets.begin(); it != touchTargets.end(); ++it) {
         // Currently the scoring function uses the overlap area with the fat point as the score.
         // We ignore the candidates that has less than 1/2 overlap (we consider not really ambiguous enough) than the best candidate to avoid excessive popups.
         if (it->value.score < bestScore * 0.5)
             continue;
         goodTargets.append(it->value.windowBoundingBox);
     }
 }
 
 } // namespace WebCore