Merge 137939

Source/WebCore/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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "ScrollingCoordinator.h"
 
+#include "Document.h"
 #include "Frame.h"
 #include "FrameView.h"
 #include "GraphicsLayer.h"
 #include "IntRect.h"
 #include "Page.h"
 #include "PlatformWheelEvent.h"
 #include "PluginViewBase.h"
 #include "Region.h"
 #include "RenderView.h"
 #include "ScrollAnimator.h"
@@ skipping 130 matching lines @@
         }
     }
 
     FrameTree* tree = frame->tree();
     for (Frame* subFrame = tree->firstChild(); subFrame; subFrame = subFrame->tree()->nextSibling())
         nonFastScrollableRegion.unite(computeNonFastScrollableRegion(subFrame, offset));
 
     return nonFastScrollableRegion;
 }
 
+#if ENABLE(TOUCH_EVENT_TRACKING)
+static void accumulateRendererTouchEventTargetRects(Vector<IntRect>& rects, const RenderObject* renderer)
+{
+    // FIXME: This method is O(N^2) as it walks the tree to the root for every renderer. RenderGeometryMap would fix this.
+    rects.append(enclosingIntRect(renderer->clippedOverflowRectForRepaint(0)));
+    if (renderer->isRenderBlock()) {
+        const RenderBlock* block = toRenderBlock(renderer);
+        for (RenderObject* child = block->firstChild(); child; child = child->nextSibling())
+            accumulateRendererTouchEventTargetRects(rects, child);
+    }
+}
+
+static void accumulateDocumentEventTargetRects(Vector<IntRect>& rects, const Document* document)
+{
+    ASSERT(document);
+    if (!document->touchEventTargets())
+        return;
+
+    const TouchEventTargetSet* targets = document->touchEventTargets();
+    for (TouchEventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) {
+        const Node* touchTarget = iter->key;
+        if (!touchTarget->inDocument())
+            continue;
+
+        if (touchTarget == document) {
+            if (RenderView* view = document->renderView())
+                rects.append(enclosingIntRect(view->clippedOverflowRectForRepaint(0)));
+            return;
+        }
+
+        if (touchTarget->isDocumentNode() && touchTarget != document) {
+            accumulateDocumentEventTargetRects(rects, static_cast<const Document*>(touchTarget));
+            continue;
+        }
+
+        if (RenderObject* renderer = touchTarget->renderer())
+            accumulateRendererTouchEventTargetRects(rects, renderer);
+    }
+}
+
+void ScrollingCoordinator::computeAbsoluteTouchEventTargetRects(const Document* document, Vector<IntRect>& rects)
+{
+    ASSERT(document);
+    if (!document->view())
+        return;
+
+    // FIXME: These rects won't be properly updated if the renderers are in a sub-tree that scrolls.
+    accumulateDocumentEventTargetRects(rects, document);
+}
+#endif
+
 unsigned ScrollingCoordinator::computeCurrentWheelEventHandlerCount()
 {
     unsigned wheelEventHandlerCount = 0;
 
     for (Frame* frame = m_page->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
         if (frame->document())
             wheelEventHandlerCount += frame->document()->wheelEventHandlerCount();
     }
 
     return wheelEventHandlerCount;
@@ skipping 224 matching lines @@
         stringBuilder.resize(stringBuilder.length() - 2);
     return stringBuilder.toString();
 }
 
 String ScrollingCoordinator::mainThreadScrollingReasonsAsText() const
 {
     return mainThreadScrollingReasonsAsText(mainThreadScrollingReasons());
 }
 
 } // namespace WebCore