Revert 177812 "Migrate touch events to EventHandlerRegistry"

trunk/Source/core/page/scrolling/ScrollingCoordinator.cpp

 /*
  * Copyright (C) 2011 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 740 matching lines @@
         if (subFrame->isLocalFrame())
             shouldHandleScrollGestureOnMainThreadRegion.unite(computeShouldHandleScrollGestureOnMainThreadRegion(toLocalFrame(subFrame), offset));
     }
 
     return shouldHandleScrollGestureOnMainThreadRegion;
 }
 
 static void accumulateDocumentTouchEventTargetRects(LayerHitTestRects& rects, const Document* document)
 {
     ASSERT(document);
-    const EventTargetSet* targets = document->frameHost()->eventHandlerRegistry().eventHandlerTargets(EventHandlerRegistry::TouchEvent);
-    if (!targets)
+    if (!document->touchEventTargets())
         return;
 
-    // If there's a handler on the window, document, html or body element (fairly common in practice),
+    const TouchEventTargetSet* targets = document->touchEventTargets();
+
+    // If there's a handler on the document, html or body element (fairly common in practice),
     // then we can quickly mark the entire document and skip looking at any other handlers.
     // Note that technically a handler on the body doesn't cover the whole document, but it's
     // reasonable to be conservative and report the whole document anyway.
     //
     // Fullscreen HTML5 video when OverlayFullscreenVideo is enabled is implemented by replacing the
     // root cc::layer with the video layer so doing this optimization causes the compositor to think
     // that there are no handlers, therefore skip it.
     if (!document->renderView()->compositor()->inOverlayFullscreenVideo()) {
-        for (EventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) {
-            EventTarget* target = iter->key;
-            Node* node = target->toNode();
-            if (target->toDOMWindow() || node == document || node == document->documentElement() || node == document->body()) {
+        for (TouchEventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) {
+            Node* target = iter->key;
+            if (target == document || target == document->documentElement() || target == document->body()) {
                 if (RenderView* rendererView = document->renderView()) {
                     rendererView->computeLayerHitTestRects(rects);
                 }
                 return;
             }
         }
     }
 
-    for (EventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) {
-        EventTarget* target = iter->key;
-        Node* node = target->toNode();
-        if (!node || !node->inDocument())
+    for (TouchEventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) {
+        const Node* target = iter->key;
+        if (!target->inDocument())
             continue;
 
-        if (node->isDocumentNode() && node != document) {
-            accumulateDocumentTouchEventTargetRects(rects, toDocument(node));
-        } else if (RenderObject* renderer = node->renderer()) {
+        if (target->isDocumentNode() && target != document) {
+            accumulateDocumentTouchEventTargetRects(rects, toDocument(target));
+        } else if (RenderObject* renderer = target->renderer()) {
             // If the set also contains one of our ancestor nodes then processing
             // this node would be redundant.
             bool hasTouchEventTargetAncestor = false;
-            for (Node* ancestor = node->parentNode(); ancestor && !hasTouchEventTargetAncestor; ancestor = ancestor->parentNode()) {
+            for (Node* ancestor = target->parentNode(); ancestor && !hasTouchEventTargetAncestor; ancestor = ancestor->parentNode()) {
                 if (targets->contains(ancestor))
                     hasTouchEventTargetAncestor = true;
             }
             if (!hasTouchEventTargetAncestor) {
                 // Walk up the tree to the outermost non-composited scrollable layer.
                 RenderLayer* enclosingNonCompositedScrollLayer = 0;
                 for (RenderLayer* parent = renderer->enclosingLayer(); parent && parent->compositingState() == NotComposited; parent = parent->parent()) {
                     if (parent->scrollsOverflow())
                         enclosingNonCompositedScrollLayer = parent;
                 }
@@ skipping 153 matching lines @@
     bool frameIsScrollable = frameView && frameView->isScrollable();
     if (frameIsScrollable != m_wasFrameScrollable)
         return true;
 
     if (WebLayer* scrollLayer = frameView ? toWebLayer(frameView->layerForScrolling()) : 0)
         return blink::WebSize(frameView->contentsSize()) != scrollLayer->bounds();
     return false;
 }
 
 } // namespace WebCore