Merge changes Ide388898,Ic49f367c,I1158a808,Iacb6ca5d,I2100dd3a,I5c1abe54,Ib0ef9902,I31dbc523,I570314b3

* changes:
  Merge WebKit at r75315: Update WebKit version
  Merge WebKit at r75315: Add FrameLoaderClient PageCache stubs
  Merge WebKit at r75315: Stub out AXObjectCache::remove()
  Merge WebKit at r75315: Fix ImageBuffer
  Merge WebKit at r75315: Fix PluginData::initPlugins()
  Merge WebKit at r75315: Fix conflicts
  Merge WebKit at r75315: Fix Makefiles
  Merge WebKit at r75315: Move Android-specific WebCore files to Source
  Merge WebKit at r75315: Initial merge by git.

1 files changed, 3040 insertions, 0 deletions

diff --git a/Source/WebCore/page/EventHandler.cpp b/Source/WebCore/page/EventHandler.cpp
new file mode 100644
index 0000000..a04bcf0
--- /dev/null
+++ b/Source/WebCore/page/EventHandler.cpp
@@ -0,0 +1,3040 @@
+/*
+ * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
+ *
+ * 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
+ * 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 "EventHandler.h"
+
+#include "AXObjectCache.h"
+#include "CachedImage.h"
+#include "Chrome.h"
+#include "ChromeClient.h"
+#include "Cursor.h"
+#include "Document.h"
+#include "DragController.h"
+#include "Editor.h"
+#include "EventNames.h"
+#include "FloatPoint.h"
+#include "FloatRect.h"
+#include "FocusController.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameTree.h"
+#include "FrameView.h"
+#include "HTMLFrameElementBase.h"
+#include "HTMLFrameSetElement.h"
+#include "HTMLInputElement.h"
+#include "HTMLNames.h"
+#include "HitTestRequest.h"
+#include "HitTestResult.h"
+#include "Image.h"
+#include "InspectorController.h"
+#include "KeyboardEvent.h"
+#include "MouseEvent.h"
+#include "MouseEventWithHitTestResults.h"
+#include "Page.h"
+#include "PlatformKeyboardEvent.h"
+#include "PlatformWheelEvent.h"
+#include "PluginDocument.h"
+#if defined(ANDROID_PLUGINS)
+#include "PluginView.h"
+#endif
+#include "RenderFrameSet.h"
+#include "RenderLayer.h"
+#include "RenderTextControlSingleLine.h"
+#include "RenderView.h"
+#include "RenderWidget.h"
+#include "Scrollbar.h"
+#include "SelectionController.h"
+#include "Settings.h"
+#include "StyleCachedImage.h"
+#include "TextEvent.h"
+#include "TextIterator.h"
+#include "UserGestureIndicator.h"
+#include "UserTypingGestureIndicator.h"
+#include "WheelEvent.h"
+#include "htmlediting.h" // for comparePositions()
+#include <wtf/CurrentTime.h>
+#include <wtf/StdLibExtras.h>
+
+#if ENABLE(SVG)
+#include "SVGDocument.h"
+#include "SVGElementInstance.h"
+#include "SVGNames.h"
+#include "SVGUseElement.h"
+#endif
+
+#if ENABLE(TOUCH_EVENTS)
+#include "PlatformTouchEvent.h"
+#include "TouchEvent.h"
+#endif
+
+#if defined(ANDROID_PLUGINS)
+#include "WebViewCore.h"
+#endif
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+#if ENABLE(DRAG_SUPPORT)
+// The link drag hysteresis is much larger than the others because there
+// needs to be enough space to cancel the link press without starting a link drag,
+// and because dragging links is rare.
+const int LinkDragHysteresis = 40;
+const int ImageDragHysteresis = 5;
+const int TextDragHysteresis = 3;
+const int GeneralDragHysteresis = 3;
+#endif // ENABLE(DRAG_SUPPORT)
+
+// Match key code of composition keydown event on windows.
+// IE sends VK_PROCESSKEY which has value 229;
+const int CompositionEventKeyCode = 229;
+
+#if ENABLE(SVG)
+using namespace SVGNames;
+#endif
+
+// When the autoscroll or the panScroll is triggered when do the scroll every 0.05s to make it smooth
+const double autoscrollInterval = 0.05;
+
+const double fakeMouseMoveInterval = 0.1;
+
+static Frame* subframeForHitTestResult(const MouseEventWithHitTestResults&);
+
+static inline bool scrollNode(float delta, WheelEvent::Granularity granularity, ScrollDirection positiveDirection, ScrollDirection negativeDirection, Node* node, Node** stopNode)
+{
+    if (!delta)
+        return false;
+    
+    if (!node->renderer())
+        return false;
+    
+    // Find the nearest enclosing box.
+    RenderBox* enclosingBox = node->renderer()->enclosingBox();
+
+    float absDelta = delta > 0 ? delta : -delta;
+    
+    if (granularity == WheelEvent::Page)
+        return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPage, absDelta, stopNode);
+
+    if (granularity == WheelEvent::Line)
+        return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByLine, absDelta, stopNode);
+
+    if (granularity == WheelEvent::Pixel)
+        return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, absDelta, stopNode);
+        
+    return false;
+}
+
+#if !PLATFORM(MAC)
+
+inline bool EventHandler::eventLoopHandleMouseUp(const MouseEventWithHitTestResults&)
+{
+    return false;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+inline bool EventHandler::eventLoopHandleMouseDragged(const MouseEventWithHitTestResults&)
+{
+    return false;
+}
+#endif
+
+#endif
+
+EventHandler::EventHandler(Frame* frame)
+    : m_frame(frame)
+    , m_mousePressed(false)
+    , m_capturesDragging(false)
+    , m_mouseDownMayStartSelect(false)
+#if ENABLE(DRAG_SUPPORT)
+    , m_mouseDownMayStartDrag(false)
+#endif
+    , m_mouseDownWasSingleClickInSelection(false)
+    , m_beganSelectingText(false)
+    , m_panScrollInProgress(false)
+    , m_panScrollButtonPressed(false)
+    , m_springLoadedPanScrollInProgress(false)
+    , m_hoverTimer(this, &EventHandler::hoverTimerFired)
+    , m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired)
+    , m_autoscrollRenderer(0)
+    , m_autoscrollInProgress(false)
+    , m_mouseDownMayStartAutoscroll(false)
+    , m_mouseDownWasInSubframe(false)
+    , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired)
+#if ENABLE(SVG)
+    , m_svgPan(false)
+#endif
+    , m_resizeLayer(0)
+    , m_eventHandlerWillResetCapturingMouseEventsNode(0)
+    , m_clickCount(0)
+    , m_mouseDownTimestamp(0)
+    , m_useLatchedWheelEventNode(false)
+    , m_widgetIsLatched(false)
+#if PLATFORM(MAC)
+    , m_mouseDownView(nil)
+    , m_sendingEventToSubview(false)
+    , m_activationEventNumber(0)
+#endif
+#if ENABLE(TOUCH_EVENTS)
+    , m_touchPressed(false)
+#endif
+{
+}
+
+EventHandler::~EventHandler()
+{
+    ASSERT(!m_fakeMouseMoveEventTimer.isActive());
+}
+    
+#if ENABLE(DRAG_SUPPORT)
+EventHandler::EventHandlerDragState& EventHandler::dragState()
+{
+    DEFINE_STATIC_LOCAL(EventHandlerDragState, state, ());
+    return state;
+}
+#endif // ENABLE(DRAG_SUPPORT)
+    
+void EventHandler::clear()
+{
+    m_hoverTimer.stop();
+    m_fakeMouseMoveEventTimer.stop();
+    m_resizeLayer = 0;
+    m_nodeUnderMouse = 0;
+    m_lastNodeUnderMouse = 0;
+#if ENABLE(SVG)
+    m_instanceUnderMouse = 0;
+    m_lastInstanceUnderMouse = 0;
+#endif
+    m_lastMouseMoveEventSubframe = 0;
+    m_lastScrollbarUnderMouse = 0;
+    m_clickCount = 0;
+    m_clickNode = 0;
+    m_frameSetBeingResized = 0;
+#if ENABLE(DRAG_SUPPORT)
+    m_dragTarget = 0;
+    m_shouldOnlyFireDragOverEvent = false;
+#endif
+    m_currentMousePosition = IntPoint();
+    m_mousePressNode = 0;
+    m_mousePressed = false;
+    m_capturesDragging = false;
+    m_capturingMouseEventsNode = 0;
+    m_latchedWheelEventNode = 0;
+    m_previousWheelScrolledNode = 0;
+#if ENABLE(TOUCH_EVENTS)
+    m_originatingTouchPointTargets.clear();
+#endif
+}
+
+void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)
+{
+    Node* innerNode = result.targetNode();
+    VisibleSelection newSelection;
+
+    if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
+        VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
+        TextGranularity granularity = CharacterGranularity;
+        if (pos.isNotNull()) {
+            newSelection = VisibleSelection(pos);
+            newSelection.expandUsingGranularity(WordGranularity);
+        }
+    
+        if (newSelection.isRange()) {
+            granularity = WordGranularity;
+            m_beganSelectingText = true;
+            if (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled()) 
+                newSelection.appendTrailingWhitespace();            
+        }
+        
+        if (m_frame->selection()->shouldChangeSelection(newSelection))
+            m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+    }
+}
+
+void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)
+{
+    if (!result.hitTestResult().isLiveLink())
+        return selectClosestWordFromMouseEvent(result);
+
+    Node* innerNode = result.targetNode();
+
+    if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
+        VisibleSelection newSelection;
+        Element* URLElement = result.hitTestResult().URLElement();
+        VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
+        if (pos.isNotNull() && pos.deepEquivalent().node()->isDescendantOf(URLElement))
+            newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement);
+    
+        TextGranularity granularity = CharacterGranularity;
+        if (newSelection.isRange()) {
+            granularity = WordGranularity;
+            m_beganSelectingText = true;
+        }
+
+        if (m_frame->selection()->shouldChangeSelection(newSelection))
+            m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+    }
+}
+
+bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)
+{
+    if (event.event().button() != LeftButton)
+        return false;
+
+    if (m_frame->selection()->isRange())
+        // A double-click when range is already selected
+        // should not change the selection.  So, do not call
+        // selectClosestWordFromMouseEvent, but do set
+        // m_beganSelectingText to prevent handleMouseReleaseEvent
+        // from setting caret selection.
+        m_beganSelectingText = true;
+    else
+        selectClosestWordFromMouseEvent(event);
+
+    return true;
+}
+
+bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event)
+{
+    if (event.event().button() != LeftButton)
+        return false;
+    
+    Node* innerNode = event.targetNode();
+    if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
+        return false;
+
+    VisibleSelection newSelection;
+    VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint()));
+    if (pos.isNotNull()) {
+        newSelection = VisibleSelection(pos);
+        newSelection.expandUsingGranularity(ParagraphGranularity);
+    }
+    
+    TextGranularity granularity = CharacterGranularity;
+    if (newSelection.isRange()) {
+        granularity = ParagraphGranularity;
+        m_beganSelectingText = true;
+    }
+    
+    if (m_frame->selection()->shouldChangeSelection(newSelection))
+        m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+
+    return true;
+}
+
+static int textDistance(const Position& start, const Position& end)
+{
+     RefPtr<Range> range = Range::create(start.node()->document(), start, end);
+     return TextIterator::rangeLength(range.get(), true);
+}
+
+bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)
+{
+    Node* innerNode = event.targetNode();
+    if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
+        return false;
+
+    // Extend the selection if the Shift key is down, unless the click is in a link.
+    bool extendSelection = event.event().shiftKey() && !event.isOverLink();
+
+    // Don't restart the selection when the mouse is pressed on an
+    // existing selection so we can allow for text dragging.
+    if (FrameView* view = m_frame->view()) {
+        IntPoint vPoint = view->windowToContents(event.event().pos());
+        if (!extendSelection && m_frame->selection()->contains(vPoint)) {
+            m_mouseDownWasSingleClickInSelection = true;
+            return false;
+        }
+    }
+
+    VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint()));
+    if (visiblePos.isNull())
+        visiblePos = VisiblePosition(innerNode, 0, DOWNSTREAM);
+    Position pos = visiblePos.deepEquivalent();
+    
+    VisibleSelection newSelection = m_frame->selection()->selection();
+    TextGranularity granularity = CharacterGranularity;
+
+    if (extendSelection && newSelection.isCaretOrRange()) {
+        m_frame->selection()->setIsDirectional(false);
+        
+        ASSERT(m_frame->settings());
+        if (m_frame->settings()->editingBehaviorType() == EditingMacBehavior) {
+            // See <rdar://problem/3668157> REGRESSION (Mail): shift-click deselects when selection
+            // was created right-to-left
+            Position start = newSelection.start();
+            Position end = newSelection.end();
+            int distanceToStart = textDistance(start, pos);
+            int distanceToEnd = textDistance(pos, end);
+            if (distanceToStart <= distanceToEnd)
+                newSelection = VisibleSelection(end, pos);
+            else
+                newSelection = VisibleSelection(start, pos);
+        } else {
+            newSelection.setExtent(pos);
+        }
+
+        if (m_frame->selection()->granularity() != CharacterGranularity) {
+            granularity = m_frame->selection()->granularity();
+            newSelection.expandUsingGranularity(m_frame->selection()->granularity());
+        }
+
+        m_beganSelectingText = true;
+    } else
+        newSelection = VisibleSelection(visiblePos);
+    
+    if (m_frame->selection()->shouldChangeSelection(newSelection))
+        m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+
+    return true;
+}
+
+bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)
+{
+#if ENABLE(DRAG_SUPPORT)
+    // Reset drag state.
+    dragState().m_dragSrc = 0;
+#endif
+
+    cancelFakeMouseMoveEvent();
+
+    if (ScrollView* scrollView = m_frame->view()) {
+        if (scrollView->isPointInScrollbarCorner(event.event().pos()))
+            return false;
+    }
+
+    bool singleClick = event.event().clickCount() <= 1;
+
+    // If we got the event back, that must mean it wasn't prevented,
+    // so it's allowed to start a drag or selection.
+    m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode());
+    
+#if ENABLE(DRAG_SUPPORT)
+    // Careful that the drag starting logic stays in sync with eventMayStartDrag()
+    m_mouseDownMayStartDrag = singleClick;
+#endif
+
+    m_mouseDownWasSingleClickInSelection = false;
+
+    m_mouseDown = event.event();
+
+    if (event.isOverWidget() && passWidgetMouseDownEventToWidget(event))
+        return true;
+
+#if ENABLE(SVG)
+    if (m_frame->document()->isSVGDocument()
+        && static_cast<SVGDocument*>(m_frame->document())->zoomAndPanEnabled()) {
+        if (event.event().shiftKey() && singleClick) {
+            m_svgPan = true;
+            static_cast<SVGDocument*>(m_frame->document())->startPan(event.event().pos());
+            return true;
+        }
+    }
+#endif
+
+    // We don't do this at the start of mouse down handling,
+    // because we don't want to do it until we know we didn't hit a widget.
+    if (singleClick)
+        focusDocumentView();
+
+    Node* innerNode = event.targetNode();
+
+    m_mousePressNode = innerNode;
+#if ENABLE(DRAG_SUPPORT)
+    m_dragStartPos = event.event().pos();
+#endif
+
+    bool swallowEvent = false;
+    m_mousePressed = true;
+    m_beganSelectingText = false;
+
+    if (event.event().clickCount() == 2)
+        swallowEvent = handleMousePressEventDoubleClick(event);
+    else if (event.event().clickCount() >= 3)
+        swallowEvent = handleMousePressEventTripleClick(event);
+    else
+        swallowEvent = handleMousePressEventSingleClick(event);
+    
+    m_mouseDownMayStartAutoscroll = m_mouseDownMayStartSelect
+        || (m_mousePressNode && m_mousePressNode->renderBox() && m_mousePressNode->renderBox()->canBeProgramaticallyScrolled(true));
+
+    return swallowEvent;
+}
+
+// There are two kinds of renderer that can autoscroll.
+static bool canAutoscroll(RenderObject* renderer)
+{
+    if (!renderer->isBox())
+        return false;
+
+    // Check for a box that can be scrolled in its own right.
+    if (toRenderBox(renderer)->canBeScrolledAndHasScrollableArea())
+        return true;
+
+    // Check for a box that represents the top level of a web page.
+    // This can be scrolled by calling Chrome::scrollRectIntoView.
+    // This only has an effect on the Mac platform in applications
+    // that put web views into scrolling containers, such as Mac OS X Mail.
+    // The code for this is in RenderLayer::scrollRectToVisible.
+    if (renderer->node() != renderer->document())
+        return false;
+    Frame* frame = renderer->frame();
+    if (!frame)
+        return false;
+    Page* page = frame->page();
+    return page && page->mainFrame() == frame;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event)
+{
+    if (handleDrag(event))
+        return true;
+
+    if (!m_mousePressed)
+        return false;
+
+    Node* targetNode = event.targetNode();
+    if (event.event().button() != LeftButton || !targetNode || !targetNode->renderer())
+        return false;
+
+#if PLATFORM(MAC) // FIXME: Why does this assertion fire on other platforms?
+    ASSERT(m_mouseDownMayStartSelect || m_mouseDownMayStartAutoscroll);
+#endif
+
+    m_mouseDownMayStartDrag = false;
+
+    if (m_mouseDownMayStartAutoscroll && !m_panScrollInProgress) {            
+        // Find a renderer that can autoscroll.
+        RenderObject* renderer = targetNode->renderer();
+        while (renderer && !canAutoscroll(renderer)) {
+            if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement())
+                renderer = renderer->document()->ownerElement()->renderer();
+            else
+                renderer = renderer->parent();
+        }
+        
+        if (renderer) {
+            m_autoscrollInProgress = true;
+            handleAutoscroll(renderer);
+        }
+        
+        m_mouseDownMayStartAutoscroll = false;
+    }
+    
+    updateSelectionForMouseDrag(targetNode, event.localPoint());
+    return true;
+}
+    
+bool EventHandler::eventMayStartDrag(const PlatformMouseEvent& event) const
+{
+    // This is a pre-flight check of whether the event might lead to a drag being started.  Be careful
+    // that its logic needs to stay in sync with handleMouseMoveEvent() and the way we setMouseDownMayStartDrag
+    // in handleMousePressEvent
+    
+    if (!m_frame->contentRenderer() || !m_frame->contentRenderer()->hasLayer())
+        return false;
+
+    if (event.button() != LeftButton || event.clickCount() != 1)
+        return false;
+    
+    bool DHTMLFlag;
+    bool UAFlag;
+    allowDHTMLDrag(DHTMLFlag, UAFlag);
+    if (!DHTMLFlag && !UAFlag)
+        return false;
+
+    FrameView* view = m_frame->view();
+    if (!view)
+        return false;
+
+    HitTestRequest request(HitTestRequest::ReadOnly);
+    HitTestResult result(view->windowToContents(event.pos()));
+    m_frame->contentRenderer()->layer()->hitTest(request, result);
+    bool srcIsDHTML;
+    return result.innerNode() && result.innerNode()->renderer()->draggableNode(DHTMLFlag, UAFlag, result.point().x(), result.point().y(), srcIsDHTML);
+}
+
+void EventHandler::updateSelectionForMouseDrag()
+{
+    FrameView* view = m_frame->view();
+    if (!view)
+        return;
+    RenderView* renderer = m_frame->contentRenderer();
+    if (!renderer)
+        return;
+    RenderLayer* layer = renderer->layer();
+    if (!layer)
+        return;
+
+    HitTestRequest request(HitTestRequest::ReadOnly |
+                           HitTestRequest::Active |
+                           HitTestRequest::MouseMove);
+    HitTestResult result(view->windowToContents(m_currentMousePosition));
+    layer->hitTest(request, result);
+    updateSelectionForMouseDrag(result.innerNode(), result.localPoint());
+}
+
+void EventHandler::updateSelectionForMouseDrag(Node* targetNode, const IntPoint& localPoint)
+{
+    if (!m_mouseDownMayStartSelect)
+        return;
+
+    if (!targetNode)
+        return;
+
+    if (!canMouseDragExtendSelect(targetNode))
+        return;
+
+    RenderObject* targetRenderer = targetNode->renderer();
+    if (!targetRenderer)
+        return;
+
+    VisiblePosition targetPosition(targetRenderer->positionForPoint(localPoint));
+
+    // Don't modify the selection if we're not on a node.
+    if (targetPosition.isNull())
+        return;
+
+    // Restart the selection if this is the first mouse move. This work is usually
+    // done in handleMousePressEvent, but not if the mouse press was on an existing selection.
+    VisibleSelection newSelection = m_frame->selection()->selection();
+
+#if ENABLE(SVG)
+    // Special case to limit selection to the containing block for SVG text.
+    // FIXME: Isn't there a better non-SVG-specific way to do this?
+    if (Node* selectionBaseNode = newSelection.base().node())
+        if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer())
+            if (selectionBaseRenderer->isSVGText())
+                if (targetNode->renderer()->containingBlock() != selectionBaseRenderer->containingBlock())
+                    return;
+#endif
+
+    if (!m_beganSelectingText) {
+        m_beganSelectingText = true;
+        newSelection = VisibleSelection(targetPosition);
+    }
+
+    newSelection.setExtent(targetPosition);
+    if (m_frame->selection()->granularity() != CharacterGranularity)
+        newSelection.expandUsingGranularity(m_frame->selection()->granularity());
+
+    if (m_frame->selection()->shouldChangeSelection(newSelection)) {
+        m_frame->selection()->setIsDirectional(false);
+        m_frame->selection()->setSelection(newSelection, m_frame->selection()->granularity(), MakeNonDirectionalSelection);
+    }
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+void EventHandler::lostMouseCapture()
+{
+    m_frame->selection()->setCaretBlinkingSuspended(false);
+}
+
+bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event)
+{
+    if (eventLoopHandleMouseUp(event))
+        return true;
+    
+    // If this was the first click in the window, we don't even want to clear the selection.
+    // This case occurs when the user clicks on a draggable element, since we have to process
+    // the mouse down and drag events to see if we might start a drag.  For other first clicks
+    // in a window, we just don't acceptFirstMouse, and the whole down-drag-up sequence gets
+    // ignored upstream of this layer.
+    return eventActivatedView(event.event());
+}    
+
+bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event)
+{
+    if (m_autoscrollInProgress)
+        stopAutoscrollTimer();
+
+    if (handleMouseUp(event))
+        return true;
+
+    // Used to prevent mouseMoveEvent from initiating a drag before
+    // the mouse is pressed again.
+    m_frame->selection()->setCaretBlinkingSuspended(false);
+    m_mousePressed = false;
+    m_capturesDragging = false;
+#if ENABLE(DRAG_SUPPORT)
+    m_mouseDownMayStartDrag = false;
+#endif
+    m_mouseDownMayStartSelect = false;
+    m_mouseDownMayStartAutoscroll = false;
+    m_mouseDownWasInSubframe = false;
+  
+    bool handled = false;
+
+    // Clear the selection if the mouse didn't move after the last mouse
+    // press and it's not a context menu click.  We do this so when clicking
+    // on the selection, the selection goes away.  However, if we are
+    // editing, place the caret.
+    if (m_mouseDownWasSingleClickInSelection && !m_beganSelectingText
+#if ENABLE(DRAG_SUPPORT)
+            && m_dragStartPos == event.event().pos()
+#endif
+            && m_frame->selection()->isRange()
+            && event.event().button() != RightButton) {
+        VisibleSelection newSelection;
+        Node* node = event.targetNode();
+        bool caretBrowsing = m_frame->settings()->caretBrowsingEnabled();
+        if (node && (caretBrowsing || node->isContentEditable()) && node->renderer()) {
+            VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint());
+            newSelection = VisibleSelection(pos);
+        }
+        if (m_frame->selection()->shouldChangeSelection(newSelection))
+            m_frame->selection()->setSelection(newSelection);
+
+        handled = true;
+    }
+
+    m_frame->selection()->notifyRendererOfSelectionChange(true);
+
+    m_frame->selection()->selectFrameElementInParentIfFullySelected();
+
+    return handled;
+}
+
+void EventHandler::handleAutoscroll(RenderObject* renderer)
+{
+    // We don't want to trigger the autoscroll or the panScroll if it's already active
+    if (m_autoscrollTimer.isActive())
+        return;     
+
+    setAutoscrollRenderer(renderer);
+
+#if ENABLE(PAN_SCROLLING)
+    if (m_panScrollInProgress) {
+        m_panScrollStartPos = currentMousePosition();
+        if (FrameView* view = m_frame->view())
+            view->addPanScrollIcon(m_panScrollStartPos);
+        // If we're not in the top frame we notify it that we doing a panScroll.
+        if (Page* page = m_frame->page()) {
+            Frame* mainFrame = page->mainFrame();
+            if (m_frame != mainFrame)
+                mainFrame->eventHandler()->setPanScrollInProgress(true);
+        }
+    }
+#endif
+
+    startAutoscrollTimer();
+}
+
+void EventHandler::autoscrollTimerFired(Timer<EventHandler>*)
+{
+    RenderObject* r = autoscrollRenderer();
+    if (!r || !r->isBox()) {
+        stopAutoscrollTimer();
+        return;
+    }
+
+    if (m_autoscrollInProgress) {
+        if (!m_mousePressed) {
+            stopAutoscrollTimer();
+            return;
+        }
+        toRenderBox(r)->autoscroll();
+    } else {
+        // we verify that the main frame hasn't received the order to stop the panScroll
+        if (Page* page = m_frame->page()) {
+            if (!page->mainFrame()->eventHandler()->panScrollInProgress()) {
+                stopAutoscrollTimer();
+                return;
+            }
+        }
+#if ENABLE(PAN_SCROLLING)
+        updatePanScrollState();
+        toRenderBox(r)->panScroll(m_panScrollStartPos);
+#endif
+    }
+}
+
+#if ENABLE(PAN_SCROLLING)
+
+void EventHandler::startPanScrolling(RenderObject* renderer)
+{
+    m_panScrollInProgress = true;
+    m_panScrollButtonPressed = true;
+    handleAutoscroll(renderer);
+    invalidateClick();
+}
+
+void EventHandler::updatePanScrollState()
+{
+    FrameView* view = m_frame->view();
+    if (!view)
+        return;
+
+    // At the original click location we draw a 4 arrowed icon. Over this icon there won't be any scroll
+    // So we don't want to change the cursor over this area
+    bool east = m_panScrollStartPos.x() < (m_currentMousePosition.x() - ScrollView::noPanScrollRadius);
+    bool west = m_panScrollStartPos.x() > (m_currentMousePosition.x() + ScrollView::noPanScrollRadius);
+    bool north = m_panScrollStartPos.y() > (m_currentMousePosition.y() + ScrollView::noPanScrollRadius);
+    bool south = m_panScrollStartPos.y() < (m_currentMousePosition.y() - ScrollView::noPanScrollRadius);
+         
+    if ((east || west || north || south) && m_panScrollButtonPressed)
+        m_springLoadedPanScrollInProgress = true;
+
+    if (north) {
+        if (east)
+            view->setCursor(northEastPanningCursor());
+        else if (west)
+            view->setCursor(northWestPanningCursor());
+        else
+            view->setCursor(northPanningCursor());
+    } else if (south) {
+        if (east)
+            view->setCursor(southEastPanningCursor());
+        else if (west)
+            view->setCursor(southWestPanningCursor());
+        else
+            view->setCursor(southPanningCursor());
+    } else if (east)
+        view->setCursor(eastPanningCursor());
+    else if (west)
+        view->setCursor(westPanningCursor());
+    else
+        view->setCursor(middlePanningCursor());
+}
+
+#endif // ENABLE(PAN_SCROLLING)
+
+RenderObject* EventHandler::autoscrollRenderer() const
+{
+    return m_autoscrollRenderer;
+}
+
+void EventHandler::updateAutoscrollRenderer()
+{
+    if (!m_autoscrollRenderer)
+        return;
+
+    HitTestResult hitTest = hitTestResultAtPoint(m_panScrollStartPos, true);
+
+    if (Node* nodeAtPoint = hitTest.innerNode())
+        m_autoscrollRenderer = nodeAtPoint->renderer();
+
+    while (m_autoscrollRenderer && !canAutoscroll(m_autoscrollRenderer))
+        m_autoscrollRenderer = m_autoscrollRenderer->parent();
+}
+
+void EventHandler::setAutoscrollRenderer(RenderObject* renderer)
+{
+    m_autoscrollRenderer = renderer;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const
+{
+    flagDHTML = false;
+    flagUA = false;
+
+    if (!m_frame)
+        return;
+
+    Page* page = m_frame->page();
+    if (!page)
+        return;
+
+    FrameView* view = m_frame->view();
+    if (!view)
+        return;
+
+    unsigned mask = page->dragController()->delegateDragSourceAction(view->contentsToWindow(m_mouseDownPos));
+    flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone;
+    flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection));
+}
+#endif // ENABLE(DRAG_SUPPORT)
+    
+HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent, bool ignoreClipping, HitTestScrollbars testScrollbars, HitTestRequest::HitTestRequestType hitType, const IntSize& padding)
+{
+    HitTestResult result(point, padding.height(), padding.width(), padding.height(), padding.width());
+    if (!m_frame->contentRenderer())
+        return result;
+    if (ignoreClipping)
+        hitType |= HitTestRequest::IgnoreClipping;
+    m_frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), result);
+
+    while (true) {
+        Node* n = result.innerNode();
+        if (!result.isOverWidget() || !n || !n->renderer() || !n->renderer()->isWidget())
+            break;
+        RenderWidget* renderWidget = toRenderWidget(n->renderer());
+        Widget* widget = renderWidget->widget();
+        if (!widget || !widget->isFrameView())
+            break;
+        Frame* frame = static_cast<HTMLFrameElementBase*>(n)->contentFrame();
+        if (!frame || !frame->contentRenderer())
+            break;
+        FrameView* view = static_cast<FrameView*>(widget);
+        IntPoint widgetPoint(result.localPoint().x() + view->scrollX() - renderWidget->borderLeft() - renderWidget->paddingLeft(), 
+            result.localPoint().y() + view->scrollY() - renderWidget->borderTop() - renderWidget->paddingTop());
+        HitTestResult widgetHitTestResult(widgetPoint, padding.height(), padding.width(), padding.height(), padding.width());
+        frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), widgetHitTestResult);
+        result = widgetHitTestResult;
+
+        if (testScrollbars == ShouldHitTestScrollbars) {
+            Scrollbar* eventScrollbar = view->scrollbarAtPoint(point);
+            if (eventScrollbar)
+                result.setScrollbar(eventScrollbar);
+        }
+    }
+    
+    // If our HitTestResult is not visible, then we started hit testing too far down the frame chain. 
+    // Another hit test at the main frame level should get us the correct visible result.
+    Frame* resultFrame = result.innerNonSharedNode() ? result.innerNonSharedNode()->document()->frame() : 0;
+    if (Page* page = m_frame->page()) {
+        Frame* mainFrame = page->mainFrame();
+        if (m_frame != mainFrame && resultFrame && resultFrame != mainFrame && !resultFrame->editor()->insideVisibleArea(result.point())) {
+            FrameView* resultView = resultFrame->view();
+            FrameView* mainView = mainFrame->view();
+            if (resultView && mainView) {
+                IntPoint windowPoint = resultView->contentsToWindow(result.point());
+                IntPoint mainFramePoint = mainView->windowToContents(windowPoint);
+                result = mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping, testScrollbars, hitType, padding);
+            }
+        }
+    }
+
+    if (!allowShadowContent)
+        result.setToNonShadowAncestor();
+
+    return result;
+}
+
+
+void EventHandler::startAutoscrollTimer()
+{
+    m_autoscrollTimer.startRepeating(autoscrollInterval);
+}
+
+void EventHandler::stopAutoscrollTimer(bool rendererIsBeingDestroyed)
+{
+    if (m_autoscrollInProgress) {
+        if (m_mouseDownWasInSubframe) {
+            if (Frame* subframe = subframeForTargetNode(m_mousePressNode.get()))
+                subframe->eventHandler()->stopAutoscrollTimer(rendererIsBeingDestroyed);
+            return;
+        }
+    }
+
+    if (autoscrollRenderer()) {
+        if (!rendererIsBeingDestroyed && (m_autoscrollInProgress || m_panScrollInProgress))
+            toRenderBox(autoscrollRenderer())->stopAutoscroll();
+#if ENABLE(PAN_SCROLLING)
+        if (m_panScrollInProgress) {
+            if (FrameView* view = m_frame->view()) {
+                view->removePanScrollIcon();
+                view->setCursor(pointerCursor());
+            }
+        }
+#endif
+
+        setAutoscrollRenderer(0);
+    }
+
+    m_autoscrollTimer.stop();
+
+    m_panScrollInProgress = false;
+    m_springLoadedPanScrollInProgress = false;
+
+    // If we're not in the top frame we notify it that we are not doing a panScroll any more.
+    if (Page* page = m_frame->page()) {
+        Frame* mainFrame = page->mainFrame();
+        if (m_frame != mainFrame)
+            mainFrame->eventHandler()->setPanScrollInProgress(false);
+    }
+
+    m_autoscrollInProgress = false;
+}
+
+Node* EventHandler::mousePressNode() const
+{
+    return m_mousePressNode.get();
+}
+
+void EventHandler::setMousePressNode(PassRefPtr<Node> node)
+{
+    m_mousePressNode = node;
+}
+
+bool EventHandler::scrollOverflow(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode)
+{
+    Node* node = startingNode;
+
+    if (!node)
+        node = m_frame->document()->focusedNode();
+
+    if (!node)
+        node = m_mousePressNode.get();
+    
+    if (node) {
+        RenderObject* r = node->renderer();
+        if (r && !r->isListBox() && r->enclosingBox()->scroll(direction, granularity)) {
+            setFrameWasScrolledByUser();
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool EventHandler::logicalScrollOverflow(ScrollLogicalDirection direction, ScrollGranularity granularity, Node* startingNode)
+{
+    Node* node = startingNode;
+
+    if (!node)
+        node = m_frame->document()->focusedNode();
+
+    if (!node)
+        node = m_mousePressNode.get();
+    
+    if (node) {
+        RenderObject* r = node->renderer();
+        if (r && !r->isListBox() && r->enclosingBox()->logicalScroll(direction, granularity)) {
+            setFrameWasScrolledByUser();
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool EventHandler::scrollRecursively(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode)
+{
+    // The layout needs to be up to date to determine if we can scroll. We may be
+    // here because of an onLoad event, in which case the final layout hasn't been performed yet.
+    m_frame->document()->updateLayoutIgnorePendingStylesheets();
+    if (scrollOverflow(direction, granularity, startingNode))
+        return true;    
+    Frame* frame = m_frame;
+    FrameView* view = frame->view();
+    if (view && view->scroll(direction, granularity))
+        return true;
+    frame = frame->tree()->parent();
+    if (!frame)
+        return false;
+    return frame->eventHandler()->scrollRecursively(direction, granularity, m_frame->document()->ownerElement());
+}
+
+bool EventHandler::logicalScrollRecursively(ScrollLogicalDirection direction, ScrollGranularity granularity, Node* startingNode)
+{
+    // The layout needs to be up to date to determine if we can scroll. We may be
+    // here because of an onLoad event, in which case the final layout hasn't been performed yet.
+    m_frame->document()->updateLayoutIgnorePendingStylesheets();
+    if (logicalScrollOverflow(direction, granularity, startingNode))
+        return true;    
+    Frame* frame = m_frame;
+    FrameView* view = frame->view();
+    
+    bool scrolled = false;
+#if PLATFORM(MAC)
+    // Mac also resets the scroll position in the inline direction.
+    if (granularity == ScrollByDocument && view && view->logicalScroll(ScrollInlineDirectionBackward, ScrollByDocument))
+        scrolled = true;
+#endif
+    if (view && view->logicalScroll(direction, granularity))
+        scrolled = true;
+    
+    if (scrolled)
+        return true;
+    
+    frame = frame->tree()->parent();
+    if (!frame)
+        return false;
+
+    return frame->eventHandler()->logicalScrollRecursively(direction, granularity, m_frame->document()->ownerElement());
+}
+
+IntPoint EventHandler::currentMousePosition() const
+{
+    return m_currentMousePosition;
+}
+
+Frame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)
+{
+    if (!hitTestResult.isOverWidget())
+        return 0;
+    return EventHandler::subframeForTargetNode(hitTestResult.targetNode());
+}
+
+Frame* EventHandler::subframeForTargetNode(Node* node)
+{
+    if (!node)
+        return 0;
+
+    RenderObject* renderer = node->renderer();
+    if (!renderer || !renderer->isWidget())
+        return 0;
+
+    Widget* widget = toRenderWidget(renderer)->widget();
+    if (!widget || !widget->isFrameView())
+        return 0;
+
+    return static_cast<FrameView*>(widget)->frame();
+}
+
+static bool isSubmitImage(Node* node)
+{
+    return node && node->hasTagName(inputTag) && static_cast<HTMLInputElement*>(node)->isImageButton();
+}
+
+// Returns true if the node's editable block is not current focused for editing
+static bool nodeIsNotBeingEdited(Node* node, Frame* frame)
+{
+    return frame->selection()->rootEditableElement() != node->rootEditableElement();
+}
+
+Cursor EventHandler::selectCursor(const MouseEventWithHitTestResults& event, Scrollbar* scrollbar)
+{
+    Node* node = event.targetNode();
+    RenderObject* renderer = node ? node->renderer() : 0;
+    RenderStyle* style = renderer ? renderer->style() : 0;
+
+    bool horizontalText = !style || style->isHorizontalWritingMode();
+    const Cursor& iBeam = horizontalText ? iBeamCursor() : verticalTextCursor();
+
+    // During selection, use an I-beam no matter what we're over.
+    // If you're capturing mouse events for a particular node, don't treat this as a selection.
+    if (m_mousePressed && m_mouseDownMayStartSelect && m_frame->selection()->isCaretOrRange() && !m_capturingMouseEventsNode)
+        return iBeam;
+
+    if (renderer && renderer->isFrameSet()) {
+        RenderFrameSet* frameSetRenderer = toRenderFrameSet(renderer);
+        if (frameSetRenderer->canResizeRow(event.localPoint()))
+            return rowResizeCursor();
+        if (frameSetRenderer->canResizeColumn(event.localPoint()))
+            return columnResizeCursor();
+    }
+
+    if (style && style->cursors()) {
+        const CursorList* cursors = style->cursors();
+        for (unsigned i = 0; i < cursors->size(); ++i) {
+            const CachedImage* cimage = 0;
+            StyleImage* image = (*cursors)[i].image();
+            if (image && image->isCachedImage())
+                cimage = static_cast<StyleCachedImage*>(image)->cachedImage();
+            if (!cimage)
+                continue;
+            IntPoint hotSpot = (*cursors)[i].hotSpot();
+            // Limit the size of cursors so that they cannot be used to cover UI elements in chrome.
+            IntSize size = cimage->image()->size();
+            if (size.width() > 128 || size.height() > 128)
+                continue;
+            if (cimage->image()->isNull())
+                break;
+            if (!cimage->errorOccurred())
+                return Cursor(cimage->image(), hotSpot);
+        }
+    }
+
+    switch (style ? style->cursor() : CURSOR_AUTO) {
+    case CURSOR_AUTO: {
+        bool editable = (node && node->isContentEditable());
+        bool editableLinkEnabled = false;
+
+        // If the link is editable, then we need to check the settings to see whether or not the link should be followed
+        if (editable) {
+            ASSERT(m_frame->settings());
+            switch (m_frame->settings()->editableLinkBehavior()) {
+            default:
+            case EditableLinkDefaultBehavior:
+            case EditableLinkAlwaysLive:
+                editableLinkEnabled = true;
+                break;
+
+            case EditableLinkNeverLive:
+                editableLinkEnabled = false;
+                break;
+
+            case EditableLinkLiveWhenNotFocused:
+                editableLinkEnabled = nodeIsNotBeingEdited(node, m_frame) || event.event().shiftKey();
+                break;
+            
+            case EditableLinkOnlyLiveWithShiftKey:
+                editableLinkEnabled = event.event().shiftKey();
+                break;
+            }
+        }
+
+        if ((event.isOverLink() || isSubmitImage(node)) && (!editable || editableLinkEnabled))
+            return handCursor();
+        bool inResizer = false;
+        if (renderer) {
+            if (RenderLayer* layer = renderer->enclosingLayer()) {
+                if (FrameView* view = m_frame->view())
+                    inResizer = layer->isPointInResizeControl(view->windowToContents(event.event().pos()));
+            }
+        }
+        if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar)
+            return iBeam;
+        return pointerCursor();
+    }
+    case CURSOR_CROSS:
+        return crossCursor();
+    case CURSOR_POINTER:
+        return handCursor();
+    case CURSOR_MOVE:
+        return moveCursor();
+    case CURSOR_ALL_SCROLL:
+        return moveCursor();
+    case CURSOR_E_RESIZE:
+        return eastResizeCursor();
+    case CURSOR_W_RESIZE:
+        return westResizeCursor();
+    case CURSOR_N_RESIZE:
+        return northResizeCursor();
+    case CURSOR_S_RESIZE:
+        return southResizeCursor();
+    case CURSOR_NE_RESIZE:
+        return northEastResizeCursor();
+    case CURSOR_SW_RESIZE:
+        return southWestResizeCursor();
+    case CURSOR_NW_RESIZE:
+        return northWestResizeCursor();
+    case CURSOR_SE_RESIZE:
+        return southEastResizeCursor();
+    case CURSOR_NS_RESIZE:
+        return northSouthResizeCursor();
+    case CURSOR_EW_RESIZE:
+        return eastWestResizeCursor();
+    case CURSOR_NESW_RESIZE:
+        return northEastSouthWestResizeCursor();
+    case CURSOR_NWSE_RESIZE:
+        return northWestSouthEastResizeCursor();
+    case CURSOR_COL_RESIZE:
+        return columnResizeCursor();
+    case CURSOR_ROW_RESIZE:
+        return rowResizeCursor();
+    case CURSOR_TEXT:
+        return iBeamCursor();
+    case CURSOR_WAIT:
+        return waitCursor();
+    case CURSOR_HELP:
+        return helpCursor();
+    case CURSOR_VERTICAL_TEXT:
+        return verticalTextCursor();
+    case CURSOR_CELL:
+        return cellCursor();
+    case CURSOR_CONTEXT_MENU:
+        return contextMenuCursor();
+    case CURSOR_PROGRESS:
+        return progressCursor();
+    case CURSOR_NO_DROP:
+        return noDropCursor();
+    case CURSOR_ALIAS:
+        return aliasCursor();
+    case CURSOR_COPY:
+        return copyCursor();
+    case CURSOR_NONE:
+        return noneCursor();
+    case CURSOR_NOT_ALLOWED:
+        return notAllowedCursor();
+    case CURSOR_DEFAULT:
+        return pointerCursor();
+    case CURSOR_WEBKIT_ZOOM_IN:
+        return zoomInCursor();
+    case CURSOR_WEBKIT_ZOOM_OUT:
+        return zoomOutCursor();
+    case CURSOR_WEBKIT_GRAB:
+        return grabCursor();
+    case CURSOR_WEBKIT_GRABBING:
+        return grabbingCursor();
+    }
+    return pointerCursor();
+}
+    
+static IntPoint documentPointForWindowPoint(Frame* frame, const IntPoint& windowPoint)
+{
+    FrameView* view = frame->view();
+    // FIXME: Is it really OK to use the wrong coordinates here when view is 0?
+    // Historically the code would just crash; this is clearly no worse than that.
+    return view ? view->windowToContents(windowPoint) : windowPoint;
+}
+
+bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)
+{
+    RefPtr<FrameView> protector(m_frame->view());
+
+    UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+    cancelFakeMouseMoveEvent();
+    m_mousePressed = true;
+    m_capturesDragging = true;
+    m_currentMousePosition = mouseEvent.pos();
+    m_mouseDownTimestamp = mouseEvent.timestamp();
+#if ENABLE(DRAG_SUPPORT)
+    m_mouseDownMayStartDrag = false;
+#endif
+    m_mouseDownMayStartSelect = false;
+    m_mouseDownMayStartAutoscroll = false;
+    if (FrameView* view = m_frame->view())
+        m_mouseDownPos = view->windowToContents(mouseEvent.pos());
+    else {
+        invalidateClick();
+        return false;
+    }
+    m_mouseDownWasInSubframe = false;
+
+#if ENABLE(COMPOSITED_FIXED_ELEMENTS)
+    // Add IgnoreClipping because fixed position elements are moved only on the
+    // UI thread.  Nodes in fixed position elements are clipped out by the view
+    // without IgnoreClipping.
+    HitTestRequest request(HitTestRequest::Active | HitTestRequest::IgnoreClipping);
+#else
+    HitTestRequest request(HitTestRequest::Active);
+#endif
+    // Save the document point we generate in case the window coordinate is invalidated by what happens 
+    // when we dispatch the event.
+    IntPoint documentPoint = documentPointForWindowPoint(m_frame, mouseEvent.pos());
+    MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
+
+    if (!mev.targetNode()) {
+        invalidateClick();
+        return false;
+    }
+
+    m_mousePressNode = mev.targetNode();
+
+#if ENABLE(INSPECTOR)
+    if (Page* page = m_frame->page()) {
+        InspectorController* inspector = page->inspectorController();
+        if (inspector && inspector->enabled() && inspector->searchingForNodeInPage()) {
+            inspector->handleMousePress();
+            invalidateClick();
+            return true;
+        }
+    }
+#endif
+
+    Frame* subframe = subframeForHitTestResult(mev);
+    if (subframe && passMousePressEventToSubframe(mev, subframe)) {
+        // Start capturing future events for this frame.  We only do this if we didn't clear
+        // the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop.
+        m_capturesDragging = subframe->eventHandler()->capturesDragging();
+        if (m_mousePressed && m_capturesDragging) {
+            m_capturingMouseEventsNode = mev.targetNode();
+            m_eventHandlerWillResetCapturingMouseEventsNode = true;
+        }
+        invalidateClick();
+        return true;
+    }
+
+#if ENABLE(PAN_SCROLLING)
+    Page* page = m_frame->page();
+    if ((page && page->mainFrame()->eventHandler()->panScrollInProgress()) || m_autoscrollInProgress) {
+        stopAutoscrollTimer();
+        invalidateClick();
+        return true;
+    }
+#endif
+
+    m_clickCount = mouseEvent.clickCount();
+    m_clickNode = mev.targetNode();
+
+    if (FrameView* view = m_frame->view()) {
+        RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0;
+        IntPoint p = view->windowToContents(mouseEvent.pos());
+        if (layer && layer->isPointInResizeControl(p)) {
+            layer->setInResizeMode(true);
+            m_resizeLayer = layer;
+            m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p);
+            invalidateClick();
+            return true;
+        }
+    }
+
+    m_frame->selection()->setCaretBlinkingSuspended(true);
+
+    bool swallowEvent = dispatchMouseEvent(eventNames().mousedownEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
+    m_capturesDragging = !swallowEvent;
+
+    // If the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults
+    // in case the scrollbar widget was destroyed when the mouse event was handled.
+    if (mev.scrollbar()) {
+        const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get();
+        HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
+        mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
+        if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())
+            m_lastScrollbarUnderMouse = 0;
+    }
+
+    if (swallowEvent) {
+        // scrollbars should get events anyway, even disabled controls might be scrollable
+        Scrollbar* scrollbar = mev.scrollbar();
+
+        updateLastScrollbarUnderMouse(scrollbar, true);
+
+        if (scrollbar)
+            passMousePressEventToScrollbar(mev, scrollbar);
+    } else {
+        // Refetch the event target node if it currently is the shadow node inside an <input> element.
+        // If a mouse event handler changes the input element type to one that has a widget associated,
+        // we'd like to EventHandler::handleMousePressEvent to pass the event to the widget and thus the
+        // event target node can't still be the shadow node.
+        if (mev.targetNode()->isShadowRoot() && mev.targetNode()->shadowHost()->hasTagName(inputTag)) {
+            HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
+            mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
+        }
+
+        FrameView* view = m_frame->view();
+        Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mouseEvent.pos()) : 0;
+        if (!scrollbar)
+            scrollbar = mev.scrollbar();
+
+        updateLastScrollbarUnderMouse(scrollbar, true);
+
+        if (scrollbar && passMousePressEventToScrollbar(mev, scrollbar))
+            swallowEvent = true;
+        else
+            swallowEvent = handleMousePressEvent(mev);
+    }
+
+    return swallowEvent;
+}
+
+// This method only exists for platforms that don't know how to deliver 
+bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent)
+{
+    RefPtr<FrameView> protector(m_frame->view());
+
+    UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+    // We get this instead of a second mouse-up 
+    m_mousePressed = false;
+    m_currentMousePosition = mouseEvent.pos();
+
+    HitTestRequest request(HitTestRequest::Active);
+    MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
+    Frame* subframe = subframeForHitTestResult(mev);
+    if (m_eventHandlerWillResetCapturingMouseEventsNode)
+        m_capturingMouseEventsNode = 0;
+    if (subframe && passMousePressEventToSubframe(mev, subframe))
+        return true;
+
+    m_clickCount = mouseEvent.clickCount();
+    bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
+
+    bool swallowClickEvent = mouseEvent.button() == LeftButton && mev.targetNode() == m_clickNode && dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
+
+    if (m_lastScrollbarUnderMouse)
+        swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp();
+
+    bool swallowMouseReleaseEvent = !swallowMouseUpEvent && handleMouseReleaseEvent(mev);
+
+    invalidateClick();
+
+    return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;
+}
+
+bool EventHandler::mouseMoved(const PlatformMouseEvent& event)
+{
+    HitTestResult hoveredNode = HitTestResult(IntPoint());
+    bool result = handleMouseMoveEvent(event, &hoveredNode);
+
+    Page* page = m_frame->page();
+    if (!page)
+        return result;
+
+    hoveredNode.setToNonShadowAncestor();
+    page->chrome()->mouseDidMoveOverElement(hoveredNode, event.modifierFlags());
+    page->chrome()->setToolTip(hoveredNode);
+    return result;
+}
+
+bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode)
+{
+    // in Radar 3703768 we saw frequent crashes apparently due to the
+    // part being null here, which seems impossible, so check for nil
+    // but also assert so that we can try to figure this out in debug
+    // builds, if it happens.
+    ASSERT(m_frame);
+    if (!m_frame)
+        return false;
+
+    RefPtr<FrameView> protector(m_frame->view());
+    m_currentMousePosition = mouseEvent.pos();
+
+    if (m_hoverTimer.isActive())
+        m_hoverTimer.stop();
+
+    cancelFakeMouseMoveEvent();
+
+#if ENABLE(SVG)
+    if (m_svgPan) {
+        static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition);
+        return true;
+    }
+#endif
+
+    if (m_frameSetBeingResized)
+        return dispatchMouseEvent(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false);
+
+    // Send events right to a scrollbar if the mouse is pressed.
+    if (m_lastScrollbarUnderMouse && m_mousePressed)
+        return m_lastScrollbarUnderMouse->mouseMoved(mouseEvent);
+
+    // Treat mouse move events while the mouse is pressed as "read-only" in prepareMouseEvent
+    // if we are allowed to select.
+    // This means that :hover and :active freeze in the state they were in when the mouse
+    // was pressed, rather than updating for nodes the mouse moves over as you hold the mouse down.
+    HitTestRequest::HitTestRequestType hitType = HitTestRequest::MouseMove;
+    if (m_mousePressed && m_mouseDownMayStartSelect)
+        hitType |= HitTestRequest::ReadOnly;
+    if (m_mousePressed)
+        hitType |= HitTestRequest::Active;
+
+#if ENABLE(TOUCH_EVENTS)
+    // Treat any mouse move events as readonly if the user is currently touching the screen.
+    if (m_touchPressed)
+        hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly;
+#endif
+    HitTestRequest request(hitType);
+    MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
+    if (hoveredNode)
+        *hoveredNode = mev.hitTestResult();
+
+    Scrollbar* scrollbar = 0;
+
+    if (m_resizeLayer && m_resizeLayer->inResizeMode())
+        m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner);
+    else {
+        if (FrameView* view = m_frame->view())
+            scrollbar = view->scrollbarAtPoint(mouseEvent.pos());
+
+        if (!scrollbar)
+            scrollbar = mev.scrollbar();
+
+        updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed);
+    }
+
+    bool swallowEvent = false;
+    RefPtr<Frame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
+ 
+    // We want mouseouts to happen first, from the inside out.  First send a move event to the last subframe so that it will fire mouseouts.
+    if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)
+        passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get());
+
+    if (newSubframe) {
+        // Update over/out state before passing the event to the subframe.
+        updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true);
+        
+        // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target
+        // node to be detached from its FrameView, in which case the event should not be passed.
+        if (newSubframe->view())
+            swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);
+    } else {
+        if (scrollbar && !m_mousePressed)
+            scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering.
+        if (Page* page = m_frame->page()) {
+            if ((!m_resizeLayer || !m_resizeLayer->inResizeMode()) && !page->mainFrame()->eventHandler()->panScrollInProgress()) {
+                // Plugins set cursor on their own. The only case WebKit intervenes is resetting cursor to arrow on mouse enter,
+                // in case the particular plugin doesn't manipulate cursor at all. Thus,  even a CSS cursor set on body has no
+                // effect on plugins (which matches Firefox).
+                bool overPluginElement = false;
+                if (mev.targetNode() && mev.targetNode()->isHTMLElement()) {
+                    HTMLElement* el = static_cast<HTMLElement*>(mev.targetNode());
+                    overPluginElement = el->hasTagName(appletTag) || el->hasTagName(objectTag) || el->hasTagName(embedTag);
+                }
+                if (!overPluginElement) {
+                    if (FrameView* view = m_frame->view())
+                        view->setCursor(selectCursor(mev, scrollbar));
+                }
+            }
+        }
+    }
+    
+    m_lastMouseMoveEventSubframe = newSubframe;
+
+    if (swallowEvent)
+        return true;
+    
+    swallowEvent = dispatchMouseEvent(eventNames().mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true);
+#if ENABLE(DRAG_SUPPORT)
+    if (!swallowEvent)
+        swallowEvent = handleMouseDraggedEvent(mev);
+#endif // ENABLE(DRAG_SUPPORT)
+
+    return swallowEvent;
+}
+
+void EventHandler::invalidateClick()
+{
+    m_clickCount = 0;
+    m_clickNode = 0;
+}
+
+bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)
+{
+    RefPtr<FrameView> protector(m_frame->view());
+    
+    UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+#if ENABLE(PAN_SCROLLING)
+    if (mouseEvent.button() == MiddleButton)
+        m_panScrollButtonPressed = false;
+    if (m_springLoadedPanScrollInProgress)
+        stopAutoscrollTimer();
+#endif
+
+    m_mousePressed = false;
+    m_currentMousePosition = mouseEvent.pos();
+
+#if ENABLE(SVG)
+    if (m_svgPan) {
+        m_svgPan = false;
+        static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition);
+        return true;
+    }
+#endif
+
+    if (m_frameSetBeingResized)
+        return dispatchMouseEvent(eventNames().mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false);
+
+    if (m_lastScrollbarUnderMouse) {
+        invalidateClick();
+        return m_lastScrollbarUnderMouse->mouseUp();
+    }
+
+#if ENABLE(COMPOSITED_FIXED_ELEMENTS)
+    // Add IgnoreClipping because fixed position elements are moved only on the
+    // UI thread.  Nodes in fixed position elements are clipped out by the view
+    // without IgnoreClipping.
+    HitTestRequest request(HitTestRequest::MouseUp | HitTestRequest::IgnoreClipping);
+#else
+    HitTestRequest request(HitTestRequest::MouseUp);
+#endif
+    MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
+    Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
+    if (m_eventHandlerWillResetCapturingMouseEventsNode)
+        m_capturingMouseEventsNode = 0;
+    if (subframe && passMouseReleaseEventToSubframe(mev, subframe))
+        return true;
+
+    bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
+
+    bool swallowClickEvent = m_clickCount > 0 && mouseEvent.button() == LeftButton && mev.targetNode() == m_clickNode && dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
+
+    if (m_resizeLayer) {
+        m_resizeLayer->setInResizeMode(false);
+        m_resizeLayer = 0;
+    }
+
+    bool swallowMouseReleaseEvent = false;
+    if (!swallowMouseUpEvent)
+        swallowMouseReleaseEvent = handleMouseReleaseEvent(mev);
+
+    invalidateClick();
+
+    return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+    FrameView* view = m_frame->view();
+
+    // FIXME: We might want to dispatch a dragleave even if the view is gone.
+    if (!view)
+        return false;
+
+    view->resetDeferredRepaintDelay();
+    IntPoint contentsPos = view->windowToContents(event.pos());
+
+    RefPtr<MouseEvent> me = MouseEvent::create(eventType,
+        true, true, m_frame->document()->defaultView(),
+        0, event.globalX(), event.globalY(), contentsPos.x(), contentsPos.y(),
+        event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
+        0, 0, clipboard);
+
+    ExceptionCode ec;
+    dragTarget->dispatchEvent(me.get(), ec);
+    return me->defaultPrevented();
+}
+
+bool EventHandler::canHandleDragAndDropForTarget(DragAndDropHandleType type, Node* target, const PlatformMouseEvent& event, Clipboard* clipboard, bool* accepted)
+{
+    bool canHandle = false;
+    bool wasAccepted = false;
+
+    if (target->hasTagName(frameTag) || target->hasTagName(iframeTag)) {
+        Frame* frame = static_cast<HTMLFrameElementBase*>(target)->contentFrame();
+        if (frame) {
+            switch (type) {
+            case UpdateDragAndDrop:
+                wasAccepted = frame->eventHandler()->updateDragAndDrop(event, clipboard);
+                break;
+            case CancelDragAndDrop:
+                frame->eventHandler()->cancelDragAndDrop(event, clipboard);
+                break;
+            case PerformDragAndDrop:
+                wasAccepted = frame->eventHandler()->performDragAndDrop(event, clipboard);
+                break;
+            }
+        }
+    } else
+        canHandle = true;
+
+    if (accepted)
+        *accepted = wasAccepted;
+
+    return canHandle;
+}
+
+bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+    bool accept = false;
+
+    if (!m_frame->view())
+        return false;
+
+    HitTestRequest request(HitTestRequest::ReadOnly);
+    MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);
+
+    // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch)
+    Node* newTarget = mev.targetNode();
+    if (newTarget && newTarget->isTextNode())
+        newTarget = newTarget->parentNode();
+    if (newTarget)
+        newTarget = newTarget->shadowAncestorNode();
+
+    if (m_dragTarget != newTarget) {
+        // FIXME: this ordering was explicitly chosen to match WinIE. However,
+        // it is sometimes incorrect when dragging within subframes, as seen with
+        // LayoutTests/fast/events/drag-in-frames.html.
+        //
+        // Moreover, this ordering conforms to section 7.9.4 of the HTML 5 spec. <http://dev.w3.org/html5/spec/Overview.html#drag-and-drop-processing-model>.
+        if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) {
+            // As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event.
+            if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
+                // for now we don't care if event handler cancels default behavior, since there is none
+                dispatchDragSrcEvent(eventNames().dragEvent, event);
+            }
+            accept = dispatchDragEvent(eventNames().dragenterEvent, newTarget, event, clipboard);
+        }
+
+        if (m_dragTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, m_dragTarget.get(), event, clipboard, &accept))
+            dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
+        
+        if (newTarget) {
+            // We do not explicitly call dispatchDragEvent here because it could ultimately result in the appearance that
+            // two dragover events fired. So, we mark that we should only fire a dragover event on the next call to this function.
+            m_shouldOnlyFireDragOverEvent = true;
+        }
+    } else {
+        if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) {
+            // Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier.
+            if (!m_shouldOnlyFireDragOverEvent && dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
+                // for now we don't care if event handler cancels default behavior, since there is none
+                dispatchDragSrcEvent(eventNames().dragEvent, event);
+            }
+            accept = dispatchDragEvent(eventNames().dragoverEvent, newTarget, event, clipboard);
+            m_shouldOnlyFireDragOverEvent = false;
+        }
+    }
+    m_dragTarget = newTarget;
+
+    return accept;
+}
+
+void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+    if (m_dragTarget && canHandleDragAndDropForTarget(CancelDragAndDrop, m_dragTarget.get(), event, clipboard)) {
+        if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML)
+            dispatchDragSrcEvent(eventNames().dragEvent, event);
+        dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
+    }
+    clearDragState();
+}
+
+bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+    bool accept = false;
+    if (m_dragTarget && canHandleDragAndDropForTarget(PerformDragAndDrop, m_dragTarget.get(), event, clipboard, &accept))
+        dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard);
+    clearDragState();
+    return accept;
+}
+
+void EventHandler::clearDragState()
+{
+    m_dragTarget = 0;
+    m_capturingMouseEventsNode = 0;
+    m_shouldOnlyFireDragOverEvent = false;
+#if PLATFORM(MAC)
+    m_sendingEventToSubview = false;
+#endif
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+void EventHandler::setCapturingMouseEventsNode(PassRefPtr<Node> n)
+{
+    m_capturingMouseEventsNode = n;
+    m_eventHandlerWillResetCapturingMouseEventsNode = false;
+}
+
+MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev)
+{
+    ASSERT(m_frame);
+    ASSERT(m_frame->document());
+    
+    return m_frame->document()->prepareMouseEvent(request, documentPointForWindowPoint(m_frame, mev.pos()), mev);
+}
+
+#if ENABLE(SVG)
+static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)
+{
+    if (!referenceNode || !referenceNode->isSVGElement())
+        return 0;
+
+    Node* shadowTreeElement = referenceNode->shadowTreeRootNode();
+    if (!shadowTreeElement)
+        return 0;
+
+    Element* shadowTreeParentElement = shadowTreeElement->shadowHost();
+    if (!shadowTreeParentElement)
+        return 0;
+
+    ASSERT(shadowTreeParentElement->hasTagName(useTag));
+    return static_cast<SVGUseElement*>(shadowTreeParentElement)->instanceForShadowTreeElement(referenceNode);
+}
+#endif
+
+void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut)
+{
+    Node* result = targetNode;
+    
+    // If we're capturing, we always go right to that node.
+    if (m_capturingMouseEventsNode)
+        result = m_capturingMouseEventsNode.get();
+    else {
+        // If the target node is a text node, dispatch on the parent node - rdar://4196646
+        if (result && result->isTextNode())
+            result = result->parentNode();
+    }
+    m_nodeUnderMouse = result;
+#if ENABLE(SVG)
+    m_instanceUnderMouse = instanceAssociatedWithShadowTreeElement(result);
+
+    // <use> shadow tree elements may have been recloned, update node under mouse in any case
+    if (m_lastInstanceUnderMouse) {
+        SVGElement* lastCorrespondingElement = m_lastInstanceUnderMouse->correspondingElement();
+        SVGElement* lastCorrespondingUseElement = m_lastInstanceUnderMouse->correspondingUseElement();
+
+        if (lastCorrespondingElement && lastCorrespondingUseElement) {
+            HashSet<SVGElementInstance*> instances = lastCorrespondingElement->instancesForElement();
+
+            // Locate the recloned shadow tree element for our corresponding instance
+            HashSet<SVGElementInstance*>::iterator end = instances.end();
+            for (HashSet<SVGElementInstance*>::iterator it = instances.begin(); it != end; ++it) {
+                SVGElementInstance* instance = (*it);
+                ASSERT(instance->correspondingElement() == lastCorrespondingElement);
+
+                if (instance == m_lastInstanceUnderMouse)
+                    continue;
+
+                if (instance->correspondingUseElement() != lastCorrespondingUseElement)
+                    continue;
+
+                SVGElement* shadowTreeElement = instance->shadowTreeElement();
+                if (!shadowTreeElement->inDocument() || m_lastNodeUnderMouse == shadowTreeElement)
+                    continue;
+
+                m_lastNodeUnderMouse = shadowTreeElement;
+                m_lastInstanceUnderMouse = instance;
+                break;
+            }
+        }
+    }
+#endif
+
+    // Fire mouseout/mouseover if the mouse has shifted to a different node.
+    if (fireMouseOverOut) {
+        if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) {
+            m_lastNodeUnderMouse = 0;
+            m_lastScrollbarUnderMouse = 0;
+#if ENABLE(SVG)
+            m_lastInstanceUnderMouse = 0;
+#endif
+        }
+
+        if (m_lastNodeUnderMouse != m_nodeUnderMouse) {
+            // send mouseout event to the old node
+            if (m_lastNodeUnderMouse)
+                m_lastNodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoutEvent, 0, m_nodeUnderMouse.get());
+            // send mouseover event to the new node
+            if (m_nodeUnderMouse)
+                m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoverEvent, 0, m_lastNodeUnderMouse.get());
+        }
+        m_lastNodeUnderMouse = m_nodeUnderMouse;
+#if ENABLE(SVG)
+        m_lastInstanceUnderMouse = instanceAssociatedWithShadowTreeElement(m_nodeUnderMouse.get());
+#endif
+    }
+}
+
+bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, bool /*cancelable*/, int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder)
+{
+    if (FrameView* view = m_frame->view())
+        view->resetDeferredRepaintDelay();
+
+    updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);
+
+    bool swallowEvent = false;
+
+    if (m_nodeUnderMouse)
+        swallowEvent = m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount);
+
+    if (!swallowEvent && eventType == eventNames().mousedownEvent) {
+
+        // If clicking on a frame scrollbar, do not mess up with content focus.
+        if (FrameView* view = m_frame->view()) {
+            if (view->scrollbarAtPoint(mouseEvent.pos()))
+                return false;
+        }
+
+        // The layout needs to be up to date to determine if an element is focusable.
+        m_frame->document()->updateLayoutIgnorePendingStylesheets();
+
+        // Blur current focus node when a link/button is clicked; this
+        // is expected by some sites that rely on onChange handlers running
+        // from form fields before the button click is processed.
+        Node* node = m_nodeUnderMouse.get();
+
+        // Walk up the DOM tree to search for a node to focus.
+        while (node) {
+            if (node->isMouseFocusable()) {
+                // To fix <rdar://problem/4895428> Can't drag selected ToDo, we don't focus a
+                // node on mouse down if it's selected and inside a focused node. It will be
+                // focused if the user does a mouseup over it, however, because the mouseup
+                // will set a selection inside it, which will call setFocuseNodeIfNeeded.
+                ExceptionCode ec = 0;
+                Node* n = node->isShadowRoot() ? node->shadowHost() : node;
+                if (m_frame->selection()->isRange()
+                    && m_frame->selection()->toNormalizedRange()->compareNode(n, ec) == Range::NODE_INSIDE
+                    && n->isDescendantOf(m_frame->document()->focusedNode()))
+                    return false;
+                    
+                break;
+            }
+            node = node->parentOrHostNode();
+        }
+
+        // If focus shift is blocked, we eat the event.  Note we should never clear swallowEvent
+        // if the page already set it (e.g., by canceling default behavior).
+        if (Page* page = m_frame->page()) {
+            if (node && node->isMouseFocusable()) {
+                if (!page->focusController()->setFocusedNode(node, m_frame))
+                    swallowEvent = true;
+            } else if (!node || !node->focused()) {
+                if (!page->focusController()->setFocusedNode(0, m_frame))
+                    swallowEvent = true;
+            }
+        }
+    }
+
+    return swallowEvent;
+}
+
+#if !PLATFORM(GTK) && !(PLATFORM(CHROMIUM) && (OS(LINUX) || OS(FREEBSD)))
+bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult&) const
+{
+    return false;
+}
+#endif
+
+bool EventHandler::handleWheelEvent(PlatformWheelEvent& e)
+{
+    Document* doc = m_frame->document();
+
+    RenderObject* docRenderer = doc->renderer();
+    if (!docRenderer)
+        return false;
+    
+    RefPtr<FrameView> protector(m_frame->view());
+
+    FrameView* view = m_frame->view();
+    if (!view)
+        return false;
+    setFrameWasScrolledByUser();
+    IntPoint vPoint = view->windowToContents(e.pos());
+
+    Node* node;
+    bool isOverWidget;
+
+    HitTestRequest request(HitTestRequest::ReadOnly);
+    HitTestResult result(vPoint);
+    doc->renderView()->layer()->hitTest(request, result);
+
+    if (m_useLatchedWheelEventNode) {
+        if (!m_latchedWheelEventNode) {
+            m_latchedWheelEventNode = result.innerNode();
+            m_widgetIsLatched = result.isOverWidget();
+        }
+
+        node = m_latchedWheelEventNode.get();
+        isOverWidget = m_widgetIsLatched;
+    } else {
+        if (m_latchedWheelEventNode)
+            m_latchedWheelEventNode = 0;
+        if (m_previousWheelScrolledNode)
+            m_previousWheelScrolledNode = 0;
+
+        node = result.innerNode();
+        isOverWidget = result.isOverWidget();
+    }
+
+    if (shouldTurnVerticalTicksIntoHorizontal(result))
+        e.turnVerticalTicksIntoHorizontal();
+
+    if (node) {
+        // Figure out which view to send the event to.
+        RenderObject* target = node->renderer();
+        
+        if (isOverWidget && target && target->isWidget()) {
+            Widget* widget = toRenderWidget(target)->widget();
+            if (widget && passWheelEventToWidget(e, widget)) {
+                e.accept();
+                return true;
+            }
+        }
+
+        node = node->shadowAncestorNode();
+        node->dispatchWheelEvent(e);
+        if (e.isAccepted())
+            return true;
+    }
+
+    if (e.isAccepted())
+        return true;
+
+    view = m_frame->view();
+    if (!view)
+        return false;
+
+    view->wheelEvent(e);
+    return e.isAccepted();
+}
+    
+void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent)
+{
+    if (!startNode || !wheelEvent)
+        return;
+    
+    Node* stopNode = m_previousWheelScrolledNode.get();
+    
+    // Break up into two scrolls if we need to.  Diagonal movement on 
+    // a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set).
+    if (scrollNode(wheelEvent->rawDeltaX(), wheelEvent->granularity(), ScrollLeft, ScrollRight, startNode, &stopNode))
+        wheelEvent->setDefaultHandled();
+    
+    if (scrollNode(wheelEvent->rawDeltaY(), wheelEvent->granularity(), ScrollUp, ScrollDown, startNode, &stopNode))
+        wheelEvent->setDefaultHandled();
+    
+    if (!m_useLatchedWheelEventNode)
+        m_previousWheelScrolledNode = stopNode;
+}
+
+#if ENABLE(CONTEXT_MENUS)
+bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event)
+{
+    Document* doc = m_frame->document();
+    FrameView* v = m_frame->view();
+    if (!v)
+        return false;
+    
+    bool swallowEvent;
+    IntPoint viewportPos = v->windowToContents(event.pos());
+    HitTestRequest request(HitTestRequest::Active);
+    MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event);
+
+    if (m_frame->editor()->behavior().shouldSelectOnContextualMenuClick()
+        && !m_frame->selection()->contains(viewportPos)
+        // FIXME: In the editable case, word selection sometimes selects content that isn't underneath the mouse.
+        // If the selection is non-editable, we do word selection to make it easier to use the contextual menu items
+        // available for text selections.  But only if we're above text.
+        && (m_frame->selection()->isContentEditable() || (mev.targetNode() && mev.targetNode()->isTextNode()))) {
+        m_mouseDownMayStartSelect = true; // context menu events are always allowed to perform a selection
+        selectClosestWordOrLinkFromMouseEvent(mev);
+    }
+
+    swallowEvent = dispatchMouseEvent(eventNames().contextmenuEvent, mev.targetNode(), true, 0, event, false);
+    
+    return swallowEvent;
+}
+
+bool EventHandler::sendContextMenuEventForKey()
+{
+    FrameView* view = m_frame->view();
+    if (!view)
+        return false;
+
+    Document* doc = m_frame->document();
+    if (!doc)
+        return false;
+
+    static const int kContextMenuMargin = 1;
+
+#if OS(WINDOWS) && !OS(WINCE)
+    int rightAligned = ::GetSystemMetrics(SM_MENUDROPALIGNMENT);
+#else
+    int rightAligned = 0;
+#endif
+    IntPoint location;
+
+    Node* focusedNode = doc->focusedNode();
+    SelectionController* selectionController = m_frame->selection();
+    Position start = selectionController->selection().start();
+
+    if (start.node() && (selectionController->rootEditableElement() || selectionController->isRange())) {
+        RefPtr<Range> selection = selectionController->toNormalizedRange();
+        IntRect firstRect = m_frame->editor()->firstRectForRange(selection.get());
+
+        int x = rightAligned ? firstRect.right() : firstRect.x();
+        location = IntPoint(x, firstRect.bottom());
+    } else if (focusedNode) {
+        RenderBoxModelObject* box = focusedNode->renderBoxModelObject();
+        IntRect clippedRect = box->absoluteClippedOverflowRect();
+        location = clippedRect.bottomLeft();
+    } else {
+        location = IntPoint(
+            rightAligned ? view->contentsWidth() - kContextMenuMargin : kContextMenuMargin,
+            kContextMenuMargin);
+    }
+
+    m_frame->view()->setCursor(pointerCursor());
+
+    IntPoint position = view->contentsToWindow(location);
+    IntPoint globalPosition = view->contentsToScreen(IntRect(location, IntSize())).location();
+
+    Node* targetNode = doc->focusedNode();
+    if (!targetNode)
+        targetNode = doc;
+
+    // Use the focused node as the target for hover and active.
+    HitTestResult result(position);
+    result.setInnerNode(targetNode);
+    HitTestRequest request(HitTestRequest::Active);
+    doc->renderView()->layer()->updateHoverActiveState(request, result);
+    doc->updateStyleIfNeeded();
+   
+    // The contextmenu event is a mouse event even when invoked using the keyboard.
+    // This is required for web compatibility.
+
+#if OS(WINDOWS)
+    MouseEventType eventType = MouseEventReleased;
+#else
+    MouseEventType eventType = MouseEventPressed;
+#endif
+
+    PlatformMouseEvent mouseEvent(position, globalPosition, RightButton, eventType, 1, false, false, false, false, WTF::currentTime());
+
+    return dispatchMouseEvent(eventNames().contextmenuEvent, targetNode, true, 0, mouseEvent, false);
+}
+
+#endif // ENABLE(CONTEXT_MENUS)
+
+void EventHandler::scheduleHoverStateUpdate()
+{
+    if (!m_hoverTimer.isActive())
+        m_hoverTimer.startOneShot(0);
+}
+
+void EventHandler::dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad& quad)
+{
+    FrameView* view = m_frame->view();
+    if (!view)
+        return;
+
+    if (m_mousePressed || !quad.containsPoint(view->windowToContents(m_currentMousePosition)))
+        return;
+
+    if (!m_fakeMouseMoveEventTimer.isActive())
+        m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveInterval);
+}
+
+void EventHandler::cancelFakeMouseMoveEvent()
+{
+    m_fakeMouseMoveEventTimer.stop();
+}
+
+void EventHandler::fakeMouseMoveEventTimerFired(Timer<EventHandler>* timer)
+{
+    ASSERT_UNUSED(timer, timer == &m_fakeMouseMoveEventTimer);
+    ASSERT(!m_mousePressed);
+
+    FrameView* view = m_frame->view();
+    if (!view)
+        return;
+
+    bool shiftKey;
+    bool ctrlKey;
+    bool altKey;
+    bool metaKey;
+    PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey);
+    IntPoint globalPoint = view->contentsToScreen(IntRect(view->windowToContents(m_currentMousePosition), IntSize())).location();
+    PlatformMouseEvent fakeMouseMoveEvent(m_currentMousePosition, globalPoint, NoButton, MouseEventMoved, 0, shiftKey, ctrlKey, altKey, metaKey, currentTime());
+    mouseMoved(fakeMouseMoveEvent);
+}
+
+// Whether or not a mouse down can begin the creation of a selection.  Fires the selectStart event.
+bool EventHandler::canMouseDownStartSelect(Node* node)
+{
+    if (!node || !node->renderer())
+        return true;
+    
+    // Some controls and images can't start a select on a mouse down.
+    if (!node->canStartSelection())
+        return false;
+            
+    return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true));
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::canMouseDragExtendSelect(Node* node)
+{
+    if (!node || !node->renderer())
+        return true;
+            
+    return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true));
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet)
+{
+    m_frameSetBeingResized = frameSet;
+}
+
+void EventHandler::resizeLayerDestroyed()
+{
+    ASSERT(m_resizeLayer);
+    m_resizeLayer = 0;
+}
+
+void EventHandler::hoverTimerFired(Timer<EventHandler>*)
+{
+    m_hoverTimer.stop();
+
+    ASSERT(m_frame);
+    ASSERT(m_frame->document());
+
+    if (RenderView* renderer = m_frame->contentRenderer()) {
+        if (FrameView* view = m_frame->view()) {
+            HitTestRequest request(HitTestRequest::MouseMove);
+            HitTestResult result(view->windowToContents(m_currentMousePosition));
+            renderer->layer()->hitTest(request, result);
+            m_frame->document()->updateStyleIfNeeded();
+        }
+    }
+}
+
+static Node* eventTargetNodeForDocument(Document* doc)
+{
+    if (!doc)
+        return 0;
+    Node* node = doc->focusedNode();
+#if defined(ANDROID_PLUGINS)
+    if (!node && doc->frame() && doc->frame()->view())
+        node = android::WebViewCore::getWebViewCore(doc->frame()->view())
+                                     ->cursorNodeIsPlugin();
+#else
+    if (!node && doc->isPluginDocument()) {
+        PluginDocument* pluginDocument = static_cast<PluginDocument*>(doc);
+        node =  pluginDocument->pluginNode();
+    }
+#endif
+    if (!node && doc->isHTMLDocument())
+        node = doc->body();
+    if (!node)
+        node = doc->documentElement();
+    return node;
+}
+
+bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)
+{
+    // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do.
+    // IE matches lower and upper case access keys regardless of Shift key state - but if both upper and
+    // lower case variants are present in a document, the correct element is matched based on Shift key state.
+    // Firefox only matches an access key if Shift is not pressed, and does that case-insensitively.
+    ASSERT(!(accessKeyModifiers() & PlatformKeyboardEvent::ShiftKey));
+    if ((evt.modifiers() & ~PlatformKeyboardEvent::ShiftKey) != accessKeyModifiers())
+        return false;
+    String key = evt.unmodifiedText();
+    Element* elem = m_frame->document()->getElementByAccessKey(key.lower());
+    if (!elem)
+        return false;
+    elem->accessKeyAction(false);
+    return true;
+}
+
+#if !PLATFORM(MAC)
+bool EventHandler::needsKeyboardEventDisambiguationQuirks() const
+{
+    return false;
+}
+#endif
+
+bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)
+{
+#if ENABLE(PAN_SCROLLING)
+    if (Page* page = m_frame->page()) {
+        if (page->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {
+            // If a key is pressed while the autoscroll/panScroll is in progress then we want to stop
+            if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown || initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) 
+                stopAutoscrollTimer();
+
+            // If we were in autoscroll/panscroll mode, we swallow the key event
+            return true;
+        }
+    }
+#endif
+
+    // Check for cases where we are too early for events -- possible unmatched key up
+    // from pressing return in the location bar.
+    RefPtr<Node> node = eventTargetNodeForDocument(m_frame->document());
+    if (!node)
+        return false;
+
+    UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+    UserTypingGestureIndicator typingGestureIndicator(m_frame);
+
+    if (FrameView* view = m_frame->view())
+        view->resetDeferredRepaintDelay();
+
+    // FIXME: what is this doing here, in keyboard event handler?
+    m_frame->loader()->resetMultipleFormSubmissionProtection();
+
+    // In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match.
+    // On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict
+    // with access keys. Then we dispatch keydown, but suppress its default handling.
+    // On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages.
+    // Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events.
+    bool matchedAnAccessKey = false;
+    if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown)
+        matchedAnAccessKey = handleAccessKey(initialKeyEvent);
+
+    // FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch.
+    if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp || initialKeyEvent.type() == PlatformKeyboardEvent::Char)
+        return !node->dispatchKeyEvent(initialKeyEvent);
+
+    bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks();
+
+    ExceptionCode ec;
+    PlatformKeyboardEvent keyDownEvent = initialKeyEvent;    
+    if (keyDownEvent.type() != PlatformKeyboardEvent::RawKeyDown)
+        keyDownEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::RawKeyDown, backwardCompatibilityMode);
+    RefPtr<KeyboardEvent> keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
+    if (matchedAnAccessKey)
+        keydown->setDefaultPrevented(true);
+    keydown->setTarget(node);
+
+    if (initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) {
+        node->dispatchEvent(keydown, ec);
+        // If frame changed as a result of keydown dispatch, then return true to avoid sending a subsequent keypress message to the new frame.
+        bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame();
+        return keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame;
+    }
+
+    // Run input method in advance of DOM event handling.  This may result in the IM
+    // modifying the page prior the keydown event, but this behaviour is necessary
+    // in order to match IE:
+    // 1. preventing default handling of keydown and keypress events has no effect on IM input;
+    // 2. if an input method handles the event, its keyCode is set to 229 in keydown event.
+    m_frame->editor()->handleInputMethodKeydown(keydown.get());
+    
+    bool handledByInputMethod = keydown->defaultHandled();
+    
+    if (handledByInputMethod) {
+        keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode);
+        keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
+        keydown->setTarget(node);
+        keydown->setDefaultHandled();
+    }
+
+    node->dispatchEvent(keydown, ec);
+    // If frame changed as a result of keydown dispatch, then return early to avoid sending a subsequent keypress message to the new frame.
+    bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame();
+    bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame;
+    if (handledByInputMethod || (keydownResult && !backwardCompatibilityMode))
+        return keydownResult;
+    
+    // Focus may have changed during keydown handling, so refetch node.
+    // But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original node.
+    if (!keydownResult) {
+        node = eventTargetNodeForDocument(m_frame->document());
+        if (!node)
+            return false;
+    }
+
+    PlatformKeyboardEvent keyPressEvent = initialKeyEvent;
+    keyPressEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::Char, backwardCompatibilityMode);
+    if (keyPressEvent.text().isEmpty())
+        return keydownResult;
+    RefPtr<KeyboardEvent> keypress = KeyboardEvent::create(keyPressEvent, m_frame->document()->defaultView());
+    keypress->setTarget(node);
+    if (keydownResult)
+        keypress->setDefaultPrevented(true);
+#if PLATFORM(MAC)
+    keypress->keypressCommands() = keydown->keypressCommands();
+#endif
+    node->dispatchEvent(keypress, ec);
+
+    return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled();
+}
+
+void EventHandler::handleKeyboardSelectionMovement(KeyboardEvent* event)
+{
+    if (!event)
+        return;
+    
+    const String& key = event->keyIdentifier();
+    bool isShifted = event->getModifierState("Shift");
+    bool isOptioned = event->getModifierState("Alt");
+    bool isCommanded = event->getModifierState("Meta");
+    
+    if (key == "Up") {
+        m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionBackward, (isCommanded) ? DocumentBoundary : LineGranularity, true);
+        event->setDefaultHandled();
+    } else if (key == "Down") {
+        m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionForward, (isCommanded) ? DocumentBoundary : LineGranularity, true);
+        event->setDefaultHandled();
+    } else if (key == "Left") {
+        m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionLeft, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
+        event->setDefaultHandled();
+    } else if (key == "Right") {
+        m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionRight, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
+        event->setDefaultHandled();
+    }    
+}
+    
+void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event)
+{
+    if (event->type() == eventNames().keydownEvent) {
+        m_frame->editor()->handleKeyboardEvent(event);
+        if (event->defaultHandled())
+            return;
+        if (event->keyIdentifier() == "U+0009")
+            defaultTabEventHandler(event);
+        else {
+            FocusDirection direction = focusDirectionForKey(event->keyIdentifier());
+            if (direction != FocusDirectionNone)
+                defaultArrowEventHandler(direction, event);
+        }
+
+        // provides KB navigation and selection for enhanced accessibility users
+        if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled())
+            handleKeyboardSelectionMovement(event);
+    }
+    if (event->type() == eventNames().keypressEvent) {
+        m_frame->editor()->handleKeyboardEvent(event);
+        if (event->defaultHandled())
+            return;
+        if (event->charCode() == ' ')
+            defaultSpaceEventHandler(event);
+    }
+}
+
+FocusDirection EventHandler::focusDirectionForKey(const AtomicString& keyIdentifier) const
+{
+    DEFINE_STATIC_LOCAL(AtomicString, Down, ("Down"));
+    DEFINE_STATIC_LOCAL(AtomicString, Up, ("Up"));
+    DEFINE_STATIC_LOCAL(AtomicString, Left, ("Left"));
+    DEFINE_STATIC_LOCAL(AtomicString, Right, ("Right"));
+
+    FocusDirection retVal = FocusDirectionNone;
+
+    if (keyIdentifier == Down)
+        retVal = FocusDirectionDown;
+    else if (keyIdentifier == Up)
+        retVal = FocusDirectionUp;
+    else if (keyIdentifier == Left)
+        retVal = FocusDirectionLeft;
+    else if (keyIdentifier == Right)
+        retVal = FocusDirectionRight;
+
+    return retVal;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::dragHysteresisExceeded(const FloatPoint& floatDragViewportLocation) const
+{
+    IntPoint dragViewportLocation((int)floatDragViewportLocation.x(), (int)floatDragViewportLocation.y());
+    return dragHysteresisExceeded(dragViewportLocation);
+}
+    
+bool EventHandler::dragHysteresisExceeded(const IntPoint& dragViewportLocation) const
+{
+    FrameView* view = m_frame->view();
+    if (!view)
+        return false;
+    IntPoint dragLocation = view->windowToContents(dragViewportLocation);
+    IntSize delta = dragLocation - m_mouseDownPos;
+    
+    int threshold = GeneralDragHysteresis;
+    if (dragState().m_dragSrcIsImage)
+        threshold = ImageDragHysteresis;
+    else if (dragState().m_dragSrcIsLink)
+        threshold = LinkDragHysteresis;
+    else if (dragState().m_dragSrcInSelection)
+        threshold = TextDragHysteresis;
+    
+    return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold;
+}
+    
+void EventHandler::freeClipboard()
+{
+    if (dragState().m_dragClipboard)
+        dragState().m_dragClipboard->setAccessPolicy(ClipboardNumb);
+}
+
+bool EventHandler::shouldDragAutoNode(Node* node, const IntPoint& point) const
+{
+    if (!node || !m_frame->view())
+        return false;
+    Page* page = m_frame->page();
+    return page && page->dragController()->mayStartDragAtEventLocation(m_frame, point, node);
+}
+
+void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation)
+{
+    if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
+        dragState().m_dragClipboard->setDestinationOperation(operation);
+        // for now we don't care if event handler cancels default behavior, since there is none
+        dispatchDragSrcEvent(eventNames().dragendEvent, event);
+    }
+    freeClipboard();
+    dragState().m_dragSrc = 0;
+    // In case the drag was ended due to an escape key press we need to ensure
+    // that consecutive mousemove events don't reinitiate the drag and drop.
+    m_mouseDownMayStartDrag = false;
+}
+    
+// returns if we should continue "default processing", i.e., whether eventhandler canceled
+bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event)
+{
+    return !dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragClipboard.get());
+}
+    
+bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event)
+{
+    if (event.event().button() != LeftButton || event.event().eventType() != MouseEventMoved) {
+        // If we allowed the other side of the bridge to handle a drag
+        // last time, then m_mousePressed might still be set. So we
+        // clear it now to make sure the next move after a drag
+        // doesn't look like a drag.
+        m_mousePressed = false;
+        return false;
+    }
+    
+    if (eventLoopHandleMouseDragged(event))
+        return true;
+    
+    // Careful that the drag starting logic stays in sync with eventMayStartDrag()
+    
+    if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
+        allowDHTMLDrag(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA);
+        if (!dragState().m_dragSrcMayBeDHTML && !dragState().m_dragSrcMayBeUA)
+            m_mouseDownMayStartDrag = false; // no element is draggable
+    }
+
+    if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
+        // try to find an element that wants to be dragged
+        HitTestRequest request(HitTestRequest::ReadOnly);
+        HitTestResult result(m_mouseDownPos);
+        m_frame->contentRenderer()->layer()->hitTest(request, result);
+        Node* node = result.innerNode();
+        if (node && node->renderer())
+            dragState().m_dragSrc = node->renderer()->draggableNode(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA,
+                                                                    m_mouseDownPos.x(), m_mouseDownPos.y(), dragState().m_dragSrcIsDHTML);
+        else
+            dragState().m_dragSrc = 0;
+        
+        if (!dragState().m_dragSrc)
+            m_mouseDownMayStartDrag = false; // no element is draggable
+        else {
+            // remember some facts about this source, while we have a HitTestResult handy
+            node = result.URLElement();
+            dragState().m_dragSrcIsLink = node && node->isLink();
+            
+            node = result.innerNonSharedNode();
+            dragState().m_dragSrcIsImage = node && node->renderer() && node->renderer()->isImage();
+            
+            dragState().m_dragSrcInSelection = m_frame->selection()->contains(m_mouseDownPos);
+        }                
+    }
+    
+    // For drags starting in the selection, the user must wait between the mousedown and mousedrag,
+    // or else we bail on the dragging stuff and allow selection to occur
+    if (m_mouseDownMayStartDrag && !dragState().m_dragSrcIsImage && dragState().m_dragSrcInSelection && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) {
+        m_mouseDownMayStartDrag = false;
+        dragState().m_dragSrc = 0;
+        // ...but if this was the first click in the window, we don't even want to start selection
+        if (eventActivatedView(event.event()))
+            m_mouseDownMayStartSelect = false;
+    }
+    
+    if (!m_mouseDownMayStartDrag)
+        return !mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll;
+    
+    // We are starting a text/image/url drag, so the cursor should be an arrow
+    if (FrameView* view = m_frame->view()) {
+        // FIXME <rdar://7577595>: Custom cursors aren't supported during drag and drop (default to pointer).
+        view->setCursor(pointerCursor());
+    }
+
+    if (!dragHysteresisExceeded(event.event().pos())) 
+        return true;
+    
+    // Once we're past the hysteresis point, we don't want to treat this gesture as a click
+    invalidateClick();
+    
+    DragOperation srcOp = DragOperationNone;      
+    
+    freeClipboard(); // would only happen if we missed a dragEnd.  Do it anyway, just
+                     // to make sure it gets numbified
+    dragState().m_dragClipboard = createDraggingClipboard();  
+    
+    if (dragState().m_dragSrcMayBeDHTML) {
+        // Check to see if the is a DOM based drag, if it is get the DOM specified drag 
+        // image and offset
+        if (dragState().m_dragSrcIsDHTML) {
+            if (RenderObject* renderer = dragState().m_dragSrc->renderer()) {
+                // FIXME: This doesn't work correctly with transforms.
+                FloatPoint absPos = renderer->localToAbsolute();
+                IntSize delta = m_mouseDownPos - roundedIntPoint(absPos);
+                dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), toPoint(delta));
+            } else {
+                // The renderer has disappeared, this can happen if the onStartDrag handler has hidden
+                // the element in some way.  In this case we just kill the drag.
+                m_mouseDownMayStartDrag = false;
+                goto cleanupDrag;
+            }
+        } 
+        
+        m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown)
+            && !m_frame->selection()->isInPasswordField();
+        
+        // Invalidate clipboard here against anymore pasteboard writing for security.  The drag
+        // image can still be changed as we drag, but not the pasteboard data.
+        dragState().m_dragClipboard->setAccessPolicy(ClipboardImageWritable);
+        
+        if (m_mouseDownMayStartDrag) {
+            // gather values from DHTML element, if it set any
+            srcOp = dragState().m_dragClipboard->sourceOperation();
+            
+            // Yuck, a draggedImage:moveTo: message can be fired as a result of kicking off the
+            // drag with dragImage!  Because of that dumb reentrancy, we may think we've not
+            // started the drag when that happens.  So we have to assume it's started before we
+            // kick it off.
+            dragState().m_dragClipboard->setDragHasStarted();
+        }
+    }
+    
+    if (m_mouseDownMayStartDrag) {
+        Page* page = m_frame->page();
+        DragController* dragController = page ? page->dragController() : 0;
+        bool startedDrag = dragController && dragController->startDrag(m_frame, dragState().m_dragClipboard.get(), srcOp, event.event(), m_mouseDownPos, dragState().m_dragSrcIsDHTML);
+        if (!startedDrag && dragState().m_dragSrcMayBeDHTML) {
+            // Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event
+            dispatchDragSrcEvent(eventNames().dragendEvent, event.event());
+            m_mouseDownMayStartDrag = false;
+        }
+    } 
+
+cleanupDrag:
+    if (!m_mouseDownMayStartDrag) {
+        // something failed to start the drag, cleanup
+        freeClipboard();
+        dragState().m_dragSrc = 0;
+    }
+    
+    // No more default handling (like selection), whether we're past the hysteresis bounds or not
+    return true;
+}
+#endif // ENABLE(DRAG_SUPPORT)
+  
+bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, bool isLineBreak, bool isBackTab)
+{
+    // Platforms should differentiate real commands like selectAll from text input in disguise (like insertNewline),
+    // and avoid dispatching text input events from keydown default handlers.
+    ASSERT(!underlyingEvent || !underlyingEvent->isKeyboardEvent() || static_cast<KeyboardEvent*>(underlyingEvent)->type() == eventNames().keypressEvent);
+    ASSERT(!(isLineBreak && isBackTab));
+
+    if (!m_frame)
+        return false;
+
+    EventTarget* target;
+    if (underlyingEvent)
+        target = underlyingEvent->target();
+    else
+        target = eventTargetNodeForDocument(m_frame->document());
+    if (!target)
+        return false;
+    
+    if (FrameView* view = m_frame->view())
+        view->resetDeferredRepaintDelay();
+
+    RefPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text, TextEvent::selectInputType(isLineBreak, isBackTab));
+    event->setUnderlyingEvent(underlyingEvent);
+
+    ExceptionCode ec;
+    target->dispatchEvent(event, ec);
+    return event->defaultHandled();
+}
+    
+#if !PLATFORM(MAC) && !PLATFORM(QT) && !PLATFORM(HAIKU) && !PLATFORM(EFL)
+bool EventHandler::invertSenseOfTabsToLinks(KeyboardEvent*) const
+{
+    return false;
+}
+#endif
+
+bool EventHandler::tabsToLinks(KeyboardEvent* event) const
+{
+    Page* page = m_frame->page();
+    if (!page)
+        return false;
+
+    if (page->chrome()->client()->tabsToLinks())
+        return !invertSenseOfTabsToLinks(event);
+
+    return invertSenseOfTabsToLinks(event);
+}
+
+void EventHandler::defaultTextInputEventHandler(TextEvent* event)
+{
+    if (m_frame->editor()->handleTextEvent(event))
+        event->setDefaultHandled();
+}
+
+#if PLATFORM(QT) || PLATFORM(MAC) || PLATFORM(ANDROID)
+
+// These two platforms handle the space event in the platform-specific WebKit code.
+// Eventually it would be good to eliminate that and use the code here instead, but
+// the Qt version is inside an ifdef and the Mac version has some extra behavior
+// so we can't unify everything yet.
+void EventHandler::defaultSpaceEventHandler(KeyboardEvent*)
+{
+}
+
+#else
+
+void EventHandler::defaultSpaceEventHandler(KeyboardEvent* event)
+{
+    ScrollLogicalDirection direction = event->shiftKey() ? ScrollBlockDirectionBackward : ScrollBlockDirectionForward;
+    if (logicalScrollOverflow(direction, ScrollByPage)) {
+        event->setDefaultHandled();
+        return;
+    }
+
+    FrameView* view = m_frame->view();
+    if (!view)
+        return;
+
+    if (view->logicalScroll(direction, ScrollByPage))
+        event->setDefaultHandled();
+}
+
+#endif
+
+void EventHandler::defaultArrowEventHandler(FocusDirection focusDirection, KeyboardEvent* event)
+{
+    if (event->ctrlKey() || event->metaKey() || event->altGraphKey() || event->shiftKey())
+        return;
+
+    Page* page = m_frame->page();
+    if (!page)
+        return;
+
+    if (!isSpatialNavigationEnabled(m_frame))
+        return;
+
+    // Arrows and other possible directional navigation keys can be used in design
+    // mode editing.
+    if (m_frame->document()->inDesignMode())
+        return;
+
+    if (page->focusController()->advanceFocus(focusDirection, event))
+        event->setDefaultHandled();
+}
+
+void EventHandler::defaultTabEventHandler(KeyboardEvent* event)
+{
+    // We should only advance focus on tabs if no special modifier keys are held down.
+    if (event->ctrlKey() || event->metaKey() || event->altGraphKey())
+        return;
+
+    Page* page = m_frame->page();
+    if (!page)
+        return;
+    if (!page->tabKeyCyclesThroughElements())
+        return;
+
+    FocusDirection focusDirection = event->shiftKey() ? FocusDirectionBackward : FocusDirectionForward;
+
+    // Tabs can be used in design mode editing.
+    if (m_frame->document()->inDesignMode())
+        return;
+
+    if (page->focusController()->advanceFocus(focusDirection, event))
+        event->setDefaultHandled();
+}
+
+void EventHandler::capsLockStateMayHaveChanged()
+{
+    Document* d = m_frame->document();
+    if (Node* node = d->focusedNode()) {
+        if (RenderObject* r = node->renderer()) {
+            if (r->isTextField())
+                toRenderTextControlSingleLine(r)->capsLockStateMayHaveChanged();
+        }
+    }
+}
+
+void EventHandler::sendResizeEvent()
+{
+    m_frame->document()->dispatchWindowEvent(Event::create(eventNames().resizeEvent, false, false));
+}
+
+void EventHandler::sendScrollEvent()
+{
+    setFrameWasScrolledByUser();
+    if (m_frame->view() && m_frame->document())
+        m_frame->document()->dispatchEvent(Event::create(eventNames().scrollEvent, true, false));
+}
+
+void EventHandler::setFrameWasScrolledByUser()
+{
+    FrameView* v = m_frame->view();
+    if (v)
+        v->setWasScrolledByUser(true);
+}
+
+bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar)
+{
+    if (!scrollbar || !scrollbar->enabled())
+        return false;
+    setFrameWasScrolledByUser();
+    return scrollbar->mouseDown(mev.event());
+}
+
+// If scrollbar (under mouse) is different from last, send a mouse exited. Set
+// last to scrollbar if setLast is true; else set last to 0.
+void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool setLast)
+{
+    if (m_lastScrollbarUnderMouse != scrollbar) {
+        // Send mouse exited to the old scrollbar.
+        if (m_lastScrollbarUnderMouse)
+            m_lastScrollbarUnderMouse->mouseExited();
+        m_lastScrollbarUnderMouse = setLast ? scrollbar : 0;
+    }
+}
+
+#if ENABLE(TOUCH_EVENTS)
+
+static const AtomicString& eventNameForTouchPointState(PlatformTouchPoint::State state)
+{
+    switch (state) {
+    case PlatformTouchPoint::TouchReleased:
+        return eventNames().touchendEvent;
+    case PlatformTouchPoint::TouchCancelled:
+        return eventNames().touchcancelEvent;
+    case PlatformTouchPoint::TouchPressed:
+        return eventNames().touchstartEvent;
+    case PlatformTouchPoint::TouchMoved:
+        return eventNames().touchmoveEvent;
+    default:
+        ASSERT_NOT_REACHED();
+        return emptyAtom;
+    }
+}
+
+bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
+{
+    // First build up the lists to use for the 'touches', 'targetTouches' and 'changedTouches' attributes
+    // in the JS event. See http://www.sitepen.com/blog/2008/07/10/touching-and-gesturing-on-the-iphone/
+    // for an overview of how these lists fit together.
+
+    // Holds the complete set of touches on the screen and will be used as the 'touches' list in the JS event.
+    RefPtr<TouchList> touches = TouchList::create();
+
+    // A different view on the 'touches' list above, filtered and grouped by event target. Used for the
+    // 'targetTouches' list in the JS event.
+    typedef HashMap<EventTarget*, RefPtr<TouchList> > TargetTouchesMap;
+    TargetTouchesMap touchesByTarget;
+
+    // Array of touches per state, used to assemble the 'changedTouches' list in the JS event.
+    typedef HashSet<RefPtr<EventTarget> > EventTargetSet;
+    struct {
+        // The touches corresponding to the particular change state this struct instance represents.
+        RefPtr<TouchList> m_touches;
+        // Set of targets involved in m_touches.
+        EventTargetSet m_targets;
+    } changedTouches[PlatformTouchPoint::TouchStateEnd];
+
+    const Vector<PlatformTouchPoint>& points = event.touchPoints();
+
+    UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+    for (unsigned i = 0; i < points.size(); ++i) {
+        const PlatformTouchPoint& point = points[i];
+        PlatformTouchPoint::State pointState = point.state();
+        IntPoint pagePoint = documentPointForWindowPoint(m_frame, point.pos());
+
+        HitTestRequest::HitTestRequestType hitType = HitTestRequest::Active | HitTestRequest::ReadOnly;
+        // The HitTestRequest types used for mouse events map quite adequately
+        // to touch events. Note that in addition to meaning that the hit test
+        // should affect the active state of the current node if necessary,
+        // HitTestRequest::Active signifies that the hit test is taking place
+        // with the mouse (or finger in this case) being pressed.
+        switch (pointState) {
+        case PlatformTouchPoint::TouchPressed:
+            hitType = HitTestRequest::Active;
+            break;
+        case PlatformTouchPoint::TouchMoved:
+            hitType = HitTestRequest::Active | HitTestRequest::MouseMove | HitTestRequest::ReadOnly;
+            break;
+        case PlatformTouchPoint::TouchReleased:
+        case PlatformTouchPoint::TouchCancelled:
+            hitType = HitTestRequest::MouseUp;
+            break;
+        default:
+            break;
+        }
+
+        HitTestResult result = hitTestResultAtPoint(pagePoint, /*allowShadowContent*/ false, false, DontHitTestScrollbars, hitType);
+        Node* node = result.innerNode();
+        ASSERT(node);
+
+        // Touch events should not go to text nodes
+        if (node->isTextNode())
+            node = node->parentNode();
+
+        Document* doc = node->document();
+        if (!doc)
+            continue;
+        if (!doc->hasListenerType(Document::TOUCH_LISTENER))
+            continue;
+
+        if (m_frame != doc->frame()) {
+            // pagePoint should always be relative to the target elements containing frame.
+            pagePoint = documentPointForWindowPoint(doc->frame(), point.pos());
+        }
+
+        int adjustedPageX = lroundf(pagePoint.x() / m_frame->pageZoomFactor());
+        int adjustedPageY = lroundf(pagePoint.y() / m_frame->pageZoomFactor());
+
+        // Increment the platform touch id by 1 to avoid storing a key of 0 in the hashmap.
+        unsigned touchPointTargetKey = point.id() + 1;
+        RefPtr<EventTarget> touchTarget;
+        if (pointState == PlatformTouchPoint::TouchPressed) {
+            m_originatingTouchPointTargets.set(touchPointTargetKey, node);
+            touchTarget = node;
+        } else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) {
+            // The target should be the original target for this touch, so get it from the hashmap. As it's a release or cancel
+            // we also remove it from the map.
+            touchTarget = m_originatingTouchPointTargets.take(touchPointTargetKey);
+        } else
+            touchTarget = m_originatingTouchPointTargets.get(touchPointTargetKey);
+
+        if (!touchTarget.get())
+            continue;
+
+        RefPtr<Touch> touch = Touch::create(doc->frame(), touchTarget.get(), point.id(),
+                                            point.screenPos().x(), point.screenPos().y(),
+                                            adjustedPageX, adjustedPageY);
+
+        // Ensure this target's touch list exists, even if it ends up empty, so it can always be passed to TouchEvent::Create below.
+        TargetTouchesMap::iterator targetTouchesIterator = touchesByTarget.find(touchTarget.get());
+        if (targetTouchesIterator == touchesByTarget.end())
+            targetTouchesIterator = touchesByTarget.set(touchTarget.get(), TouchList::create()).first;
+
+        // touches and targetTouches should only contain information about touches still on the screen, so if this point is
+        // released or cancelled it will only appear in the changedTouches list.
+        if (pointState != PlatformTouchPoint::TouchReleased && pointState != PlatformTouchPoint::TouchCancelled) {
+            touches->append(touch);
+            targetTouchesIterator->second->append(touch);
+        }
+
+        // Now build up the correct list for changedTouches.
+        // Note that  any touches that are in the TouchStationary state (e.g. if
+        // the user had several points touched but did not move them all) should
+        // never be in the changedTouches list so we do not handle them explicitly here.
+        // See https://bugs.webkit.org/show_bug.cgi?id=37609 for further discussion
+        // about the TouchStationary state.
+        if (pointState != PlatformTouchPoint::TouchStationary) {
+            ASSERT(pointState < PlatformTouchPoint::TouchStateEnd);
+            if (!changedTouches[pointState].m_touches)
+                changedTouches[pointState].m_touches = TouchList::create();
+            changedTouches[pointState].m_touches->append(touch);
+            changedTouches[pointState].m_targets.add(touchTarget);
+        }
+    }
+    m_touchPressed = touches->length() > 0;
+
+    // Now iterate the changedTouches list and m_targets within it, sending events to the tagets as required.
+    bool defaultPrevented = false;
+    RefPtr<TouchList> emptyList = TouchList::create();
+    for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) {
+        if (!changedTouches[state].m_touches)
+            continue;
+
+        // When sending a touch cancel event, use empty touches and targetTouches lists.
+        bool isTouchCancelEvent = (state == PlatformTouchPoint::TouchCancelled);
+        RefPtr<TouchList>& effectiveTouches(isTouchCancelEvent ? emptyList : touches);
+#if PLATFORM(ANDROID)
+        AtomicString stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
+        if (event.type() == TouchLongPress)
+            stateName = eventNames().touchlongpressEvent;
+        else if (event.type() == TouchDoubleTap)
+            stateName = eventNames().touchdoubletapEvent;
+#else
+        const AtomicString& stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
+#endif
+        const EventTargetSet& targetsForState = changedTouches[state].m_targets;
+
+        for (EventTargetSet::const_iterator it = targetsForState.begin(); it != targetsForState.end(); ++it) {
+            EventTarget* touchEventTarget = it->get();
+            RefPtr<TouchList> targetTouches(isTouchCancelEvent ? emptyList : touchesByTarget.get(touchEventTarget));
+            ASSERT(targetTouches);
+
+            RefPtr<TouchEvent> touchEvent =
+                TouchEvent::create(effectiveTouches.get(), targetTouches.get(), changedTouches[state].m_touches.get(),
+                                   stateName, touchEventTarget->toNode()->document()->defaultView(),
+                                   0, 0, 0, 0, event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey());
+            ExceptionCode ec = 0;
+            touchEventTarget->dispatchEvent(touchEvent.get(), ec);
+            defaultPrevented |= touchEvent->defaultPrevented();
+        }
+    }
+
+    return defaultPrevented;
+}
+#endif
+
+}