Introduce isHTMLAreaElement and toHTMLAreaElement

Source/core/accessibility/AccessibilityRenderObject.cpp

 /*
 * Copyright (C) 2008 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
@@ skipping 1379 matching lines @@
 
     RenderLayer* layer = toRenderBox(m_renderer)->layer();
 
     HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
     HitTestResult hitTestResult = HitTestResult(point);
     layer->hitTest(request, hitTestResult);
     if (!hitTestResult.innerNode())
         return 0;
     Node* node = hitTestResult.innerNode()->deprecatedShadowAncestorNode();
 
-    if (node->hasTagName(areaTag))
-        return accessibilityImageMapHitTest(static_cast<HTMLAreaElement*>(node), point);
+    if (isHTMLAreaElement(node))
+        return accessibilityImageMapHitTest(toHTMLAreaElement(node), point);
 
     if (node->hasTagName(optionTag))
         node = toHTMLOptionElement(node)->ownerSelectElement();
 
     RenderObject* obj = node->renderer();
     if (!obj)
         return 0;
 
     AccessibilityObject* result = obj->document()->axObjectCache()->getOrCreate(obj);
     result->updateChildrenIfNecessary();
@@ skipping 932 matching lines @@
     RenderBoxModelObject* cssBox = renderBoxModelObject();
     if (!cssBox || !cssBox->isRenderImage())
         return;
 
     HTMLMapElement* map = toRenderImage(cssBox)->imageMap();
     if (!map)
         return;
 
     for (Element* current = ElementTraversal::firstWithin(map); current; current = ElementTraversal::next(current, map)) {
         // add an <area> element for this child if it has a link
-        if (current->hasTagName(areaTag) && current->isLink()) {
+        if (isHTMLAreaElement(current) && current->isLink()) {
             AccessibilityImageMapLink* areaObject = static_cast<AccessibilityImageMapLink*>(axObjectCache()->getOrCreate(ImageMapLinkRole));
-            areaObject->setHTMLAreaElement(static_cast<HTMLAreaElement*>(current));
+            areaObject->setHTMLAreaElement(toHTMLAreaElement(current));
             areaObject->setHTMLMapElement(map);
             areaObject->setParent(this);
             if (!areaObject->accessibilityIsIgnored())
                 m_children.append(areaObject);
             else
                 axObjectCache()->remove(areaObject->axObjectID());
         }
     }
 }
 
@@ skipping 144 matching lines @@
         if (label && label->renderer()) {
             LayoutRect labelRect = axObjectCache()->getOrCreate(label)->elementRect();
             result.unite(labelRect);
         }
     }
 
     return result;
 }
 
 } // namespace WebCore