third_party/WebKit/WebCore/page/EventHandler.cpp - Issue 21165: Revert the merge. Mac build is mysteriously broken.

Unified Diff: third_party/WebKit/WebCore/page/EventHandler.cpp

Issue 21165: Revert the merge. Mac build is mysteriously broken. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/

Patch Set: Created 11 years, 10 months ago

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Index: third_party/WebKit/WebCore/page/EventHandler.cpp

===================================================================

--- third_party/WebKit/WebCore/page/EventHandler.cpp (revision 9383)

+++ third_party/WebKit/WebCore/page/EventHandler.cpp (working copy)

@@ -1,2323 +1,2321 @@

-/*

- *

- * 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 "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 "HitTestRequest.h"

-#include "HitTestResult.h"

-#include "HTMLFrameSetElement.h"

-#include "HTMLFrameElementBase.h"

-#include "HTMLInputElement.h"

-#include "HTMLNames.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 "RenderFrameSet.h"

-#include "RenderWidget.h"

-#include "RenderView.h"

-#include "Scrollbar.h"

-#include "SelectionController.h"

-#include "Settings.h"

-#include "TextEvent.h"

-#include <wtf/StdLibExtras.h>

-#if ENABLE(SVG)

-#include "SVGDocument.h"

-#include "SVGElementInstance.h"

-#include "SVGNames.h"

-#include "SVGUseElement.h"

-#endif

-namespace WebCore {

-using namespace HTMLNames;

-// 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;

-// 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;

-static Frame* subframeForTargetNode(Node*);

-static Frame* subframeForHitTestResult(const MouseEventWithHitTestResults&);

-static inline void scrollAndAcceptEvent(float delta, ScrollDirection positiveDirection, ScrollDirection negativeDirection, PlatformWheelEvent& e, Node* node)

- if (!delta)

- return;

- // Find the nearest enclosing box.

- RenderBox* enclosingBox = node->renderer()->enclosingBox();

- if (e.granularity() == ScrollByPageWheelEvent) {

- if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPage, 1))

- e.accept();

- return;

- }

- float pixelsToScroll = delta > 0 ? delta : -delta;

- if (e.granularity() == ScrollByLineWheelEvent)

- pixelsToScroll *= cMouseWheelPixelsPerLineStep;

- if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, pixelsToScroll))

- e.accept();

-EventHandler::EventHandler(Frame* frame)

- : m_frame(frame)

- , m_mousePressed(false)

- , m_mouseDownMayStartSelect(false)

- , m_mouseDownMayStartDrag(false)

- , m_mouseDownWasSingleClickInSelection(false)

- , m_beganSelectingText(false)

- , m_panScrollInProgress(false)

- , m_hoverTimer(this, &EventHandler::hoverTimerFired)

- , m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired)

- , m_autoscrollRenderer(0)

- , m_autoscrollInProgress(false)

- , m_mouseDownMayStartAutoscroll(false)

- , m_mouseDownWasInSubframe(false)

-#if ENABLE(SVG)

- , m_svgPan(false)

-#endif

- , m_resizeLayer(0)

- , m_capturingMouseEventsNode(0)

- , m_clickCount(0)

- , m_mouseDownTimestamp(0)

- , m_pendingFrameUnloadEventCount(0)

- , m_pendingFrameBeforeUnloadEventCount(0)

-#if PLATFORM(MAC)

- , m_mouseDownView(nil)

- , m_sendingEventToSubview(false)

- , m_activationEventNumber(0)

-#endif

-EventHandler::~EventHandler()

-EventHandler::EventHandlerDragState& EventHandler::dragState()

- DEFINE_STATIC_LOCAL(EventHandlerDragState, state, ());

- return state;

-void EventHandler::clear()

- m_hoverTimer.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;

- m_dragTarget = 0;

- m_currentMousePosition = IntPoint();

- m_mousePressNode = 0;

- m_mousePressed = false;

- m_capturingMouseEventsNode = 0;

-void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)

- Node* innerNode = result.targetNode();

- Selection newSelection;

- if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {

- VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));

- if (pos.isNotNull()) {

- newSelection = Selection(pos);

- newSelection.expandUsingGranularity(WordGranularity);

- }

- if (newSelection.isRange()) {

- m_frame->setSelectionGranularity(WordGranularity);

- m_beganSelectingText = true;

- if (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled())

- newSelection.appendTrailingWhitespace();

- }

- if (m_frame->shouldChangeSelection(newSelection))

- m_frame->selection()->setSelection(newSelection);

- }

-void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)

- if (!result.hitTestResult().isLiveLink())

- return selectClosestWordFromMouseEvent(result);

- Node* innerNode = result.targetNode();

- if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {

- Selection newSelection;

- Element* URLElement = result.hitTestResult().URLElement();

- VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));

- if (pos.isNotNull() && pos.deepEquivalent().node()->isDescendantOf(URLElement))

- newSelection = Selection::selectionFromContentsOfNode(URLElement);

- if (newSelection.isRange()) {

- m_frame->setSelectionGranularity(WordGranularity);

- m_beganSelectingText = true;

- }

- if (m_frame->shouldChangeSelection(newSelection))

- m_frame->selection()->setSelection(newSelection);

- }

-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;

- Selection newSelection;

- VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint()));

- if (pos.isNotNull()) {

- newSelection = Selection(pos);

- newSelection.expandUsingGranularity(ParagraphGranularity);

- }

- if (newSelection.isRange()) {

- m_frame->setSelectionGranularity(ParagraphGranularity);

- m_beganSelectingText = true;

- }

- if (m_frame->shouldChangeSelection(newSelection))

- m_frame->selection()->setSelection(newSelection);

- return true;

-bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)

- if (event.event().button() != LeftButton)

- return false;

- 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.

- IntPoint vPoint = m_frame->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();

- Selection newSelection = m_frame->selection()->selection();

- if (extendSelection && newSelection.isCaretOrRange()) {

- m_frame->selection()->setLastChangeWasHorizontalExtension(false);

- // See <rdar://problem/3668157> REGRESSION (Mail): shift-click deselects when selection

- // was created right-to-left

- Position start = newSelection.start();

- Position end = newSelection.end();

- short before = Range::compareBoundaryPoints(pos.node(), pos.offset(), start.node(), start.offset());

- if (before <= 0)

- newSelection = Selection(pos, end);

- else

- newSelection = Selection(start, pos);

- if (m_frame->selectionGranularity() != CharacterGranularity)

- newSelection.expandUsingGranularity(m_frame->selectionGranularity());

- m_beganSelectingText = true;

- } else {

- newSelection = Selection(visiblePos);

- m_frame->setSelectionGranularity(CharacterGranularity);

- }

- if (m_frame->shouldChangeSelection(newSelection))

- m_frame->selection()->setSelection(newSelection);

- return true;

-bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)

- // Reset drag state.

- dragState().m_dragSrc = 0;

- 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());

- // Careful that the drag starting logic stays in sync with eventMayStartDrag()

- m_mouseDownMayStartDrag = singleClick;

- m_mouseDownWasSingleClickInSelection = false;

- 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;

- m_dragStartPos = event.event().pos();

- bool swallowEvent = false;

- if (event.event().button() == LeftButton || event.event().button() == MiddleButton) {

- m_frame->selection()->setCaretBlinkingSuspended(true);

- 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;

-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) {

- // If the selection is contained in a layer that can scroll, that layer should handle the autoscroll

- // Otherwise, let the bridge handle it so the view can scroll itself.

- RenderObject* renderer = targetNode->renderer();

- while (renderer && (!renderer->isBox() || !toRenderBox(renderer)->canBeProgramaticallyScrolled(false))) {

- 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()

- || event.button() != LeftButton || event.clickCount() != 1)

- return false;

- bool DHTMLFlag;

- bool UAFlag;

- allowDHTMLDrag(DHTMLFlag, UAFlag);

- if (!DHTMLFlag && !UAFlag)

- return false;

- HitTestRequest request(HitTestRequest::ReadOnly);

- HitTestResult result(m_frame->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;

- RenderObject* targetRenderer = targetNode->renderer();

- if (!targetRenderer)

- return;

- if (!canMouseDragExtendSelect(targetNode))

- 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.

- Selection 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 = Selection(targetPosition);

- }

- newSelection.setExtent(targetPosition);

- if (m_frame->selectionGranularity() != CharacterGranularity)

- newSelection.expandUsingGranularity(m_frame->selectionGranularity());

- if (m_frame->shouldChangeSelection(newSelection)) {

- m_frame->selection()->setLastChangeWasHorizontalExtension(false);

- m_frame->selection()->setSelection(newSelection);

- }

-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_mouseDownMayStartDrag = false;

- 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.

- // 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

- && m_dragStartPos == event.event().pos()

- && m_frame->selection()->isRange()) {

- Selection newSelection;

- Node *node = event.targetNode();

- if (node && node->isContentEditable() && node->renderer()) {

- VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint());

- newSelection = Selection(pos);

- }

- if (m_frame->shouldChangeSelection(newSelection))

- m_frame->selection()->setSelection(newSelection);

- handled = true;

- }

- m_frame->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();

- m_frame->view()->addPanScrollIcon(m_panScrollStartPos);

- // If we're not in the top frame we notify it that we are using the panScroll

- if (m_frame != m_frame->page()->mainFrame())

- m_frame->page()->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 (!m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress()) {

- stopAutoscrollTimer();

- return;

- }

-#if ENABLE(PAN_SCROLLING)

- setPanScrollCursor();

- toRenderBox(r)->panScroll(m_panScrollStartPos);

-#endif

- }

-void EventHandler::setPanScrollCursor()

- // 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

- const int noScrollRadius = 9;

- bool east = m_panScrollStartPos.x() < (m_currentMousePosition.x() - noScrollRadius);

- bool west = m_panScrollStartPos.x() > (m_currentMousePosition.x() + noScrollRadius);

- bool north = m_panScrollStartPos.y() > (m_currentMousePosition.y() + noScrollRadius);

- bool south = m_panScrollStartPos.y() < (m_currentMousePosition.y() - noScrollRadius);

- if (north) {

- if (east)

- m_frame->view()->setCursor(northEastPanningCursor());

- else if (west)

- m_frame->view()->setCursor(northWestPanningCursor());

- else

- m_frame->view()->setCursor(northPanningCursor());

- } else if (south) {

- if (east)

- m_frame->view()->setCursor(southEastPanningCursor());

- else if (west)

- m_frame->view()->setCursor(southWestPanningCursor());

- else

- m_frame->view()->setCursor(southPanningCursor());

- } else if (east)

- m_frame->view()->setCursor(eastPanningCursor());

- else if (west)

- m_frame->view()->setCursor(westPanningCursor());

- else

- m_frame->view()->setCursor(middlePanningCursor());

-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 && (!m_autoscrollRenderer->isBox() || !toRenderBox(m_autoscrollRenderer)->canBeProgramaticallyScrolled(false)))

- m_autoscrollRenderer = m_autoscrollRenderer->parent();

-void EventHandler::setAutoscrollRenderer(RenderObject* renderer)

- m_autoscrollRenderer = renderer;

-void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const

- if (!m_frame || !m_frame->document()) {

- flagDHTML = false;

- flagUA = false;

- return;

- }

- unsigned mask = m_frame->page()->dragController()->delegateDragSourceAction(m_frame->view()->contentsToWindow(m_mouseDownPos));

- flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone;

- flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection));

-HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent, bool ignoreClipping)

- HitTestResult result(point);

- if (!m_frame->contentRenderer())

- return result;

- int hitType = HitTestRequest::ReadOnly | HitTestRequest::Active;

- 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 = static_cast<RenderWidget*>(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);

- frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), widgetHitTestResult);

- result = widgetHitTestResult;

- }

- // 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;

- Frame* mainFrame = m_frame->page()->mainFrame();

- if (m_frame != mainFrame && resultFrame && resultFrame != mainFrame && !resultFrame->editor()->insideVisibleArea(result.point())) {

- IntPoint windowPoint = resultFrame->view()->contentsToWindow(result.point());

- IntPoint mainFramePoint = mainFrame->view()->windowToContents(windowPoint);

- result = mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping);

- }

- 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) {

- m_frame->view()->removePanScrollIcon();

- m_frame->view()->setCursor(pointerCursor());

- }

-#endif

- setAutoscrollRenderer(0);

- }

- m_autoscrollTimer.stop();

- m_panScrollInProgress = false;

- // If we're not in the top frame we notify it that we are not using the panScroll anymore

- if (m_frame->page() && m_frame != m_frame->page()->mainFrame())

- m_frame->page()->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)

- if (!m_frame->document())

- return false;

- Node* node = m_frame->document()->focusedNode();

- if (!node)

- node = m_mousePressNode.get();

- if (node) {

- RenderObject* r = node->renderer();

- if (r && !r->isListBox())

- return r->enclosingBox()->scroll(direction, granularity);

- }

- return false;

-IntPoint EventHandler::currentMousePosition() const

- return m_currentMousePosition;

-Frame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)

- if (!hitTestResult.isOverWidget())

- return 0;

- return subframeForTargetNode(hitTestResult.targetNode());

-Frame* subframeForTargetNode(Node* node)

- if (!node)

- return 0;

- RenderObject* renderer = node->renderer();

- if (!renderer || !renderer->isWidget())

- return 0;

- Widget* widget = static_cast<RenderWidget*>(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)->inputType() == HTMLInputElement::IMAGE;

-// 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)

- // 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 iBeamCursor();

- Node* node = event.targetNode();

- RenderObject* renderer = node ? node->renderer() : 0;

- RenderStyle* style = renderer ? renderer->style() : 0;

- if (renderer && renderer->isFrameSet()) {

- RenderFrameSet* fs = static_cast<RenderFrameSet*>(renderer);

- if (fs->canResizeRow(event.localPoint()))

- return rowResizeCursor();

- if (fs->canResizeColumn(event.localPoint()))

- return columnResizeCursor();

- }

- if (style && style->cursors()) {

- const CursorList* cursors = style->cursors();

- for (unsigned i = 0; i < cursors->size(); ++i) {

- CachedImage* cimage = (*cursors)[i].cursorImage.get();

- IntPoint hotSpot = (*cursors)[i].hotSpot;

- if (!cimage)

- continue;

- // 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;

- // Do not let the hotspot be outside the bounds of the image.

- if (hotSpot.x() < 0 || hotSpot.y() < 0 || hotSpot.x() > size.width() || hotSpot.y() > size.height())

- 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();

- RenderLayer* layer = renderer ? renderer->enclosingLayer() : 0;

- bool inResizer = false;

- if (m_frame->view() && layer && layer->isPointInResizeControl(m_frame->view()->windowToContents(event.event().pos())))

- inResizer = true;

- if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar)

- return iBeamCursor();

- 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();

-bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)

- if (!m_frame->document())

- return false;

- RefPtr<FrameView> protector(m_frame->view());

- m_mousePressed = true;

- m_currentMousePosition = mouseEvent.pos();

- m_mouseDownTimestamp = mouseEvent.timestamp();

- m_mouseDownMayStartDrag = false;

- m_mouseDownMayStartSelect = false;

- m_mouseDownMayStartAutoscroll = false;

- m_mouseDownPos = m_frame->view()->windowToContents(mouseEvent.pos());

- m_mouseDownWasInSubframe = false;

- HitTestRequest request(HitTestRequest::Active);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);

- if (!mev.targetNode()) {

- invalidateClick();

- return false;

- }

- m_mousePressNode = mev.targetNode();

- InspectorController* inspector = m_frame->page()->inspectorController();

- if (inspector && inspector->enabled() && inspector->searchingForNodeInPage()) {

- inspector->handleMousePressOnNode(m_mousePressNode.get());

- invalidateClick();

- return true;

- }

- 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.

- if (m_mousePressed)

- m_capturingMouseEventsNode = mev.targetNode();

- invalidateClick();

- return true;

- }

-#if ENABLE(PAN_SCROLLING)

- if (m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {

- stopAutoscrollTimer();

- invalidateClick();

- return true;

- }

- if (mouseEvent.button() == MiddleButton && !mev.isOverLink()) {

- RenderObject* renderer = mev.targetNode()->renderer();

- while (renderer && (!renderer->isBox() || !toRenderBox(renderer)->canBeProgramaticallyScrolled(false))) {

- if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement())

- renderer = renderer->document()->ownerElement()->renderer();

- else

- renderer = renderer->parent();

- }

- if (renderer) {

- m_panScrollInProgress = true;

- handleAutoscroll(renderer);

- invalidateClick();

- return true;

- }

-#endif

- m_clickCount = mouseEvent.clickCount();

- m_clickNode = mev.targetNode();

- RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0;

- IntPoint p = m_frame->view()->windowToContents(mouseEvent.pos());

- if (layer && layer->isPointInResizeControl(p)) {

- layer->setInResizeMode(true);

- m_resizeLayer = layer;

- m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p);

- invalidateClick();

- return true;

- }

- bool swallowEvent = dispatchMouseEvent(eventNames().mousedownEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);

- // 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 = prepareMouseEvent(request, mouseEvent);

- if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())

- m_lastScrollbarUnderMouse = 0;

- }

- if (swallowEvent) {

- // scrollbars should get events anyway, even disabled controls might be scrollable

- if (mev.scrollbar())

- passMousePressEventToScrollbar(mev, 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()->isShadowNode() && mev.targetNode()->shadowParentNode()->hasTagName(inputTag)) {

- HitTestRequest request(HitTestRequest::ReadOnly |

- HitTestRequest::Active);

- mev = prepareMouseEvent(request, mouseEvent);

- }

- Scrollbar* scrollbar = m_frame->view()->scrollbarUnderMouse(mouseEvent);

- if (!scrollbar)

- scrollbar = mev.scrollbar();

- 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)

- if (!m_frame->document())

- return false;

- RefPtr<FrameView> protector(m_frame->view());

- // 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 (subframe && passMousePressEventToSubframe(mev, subframe)) {

- m_capturingMouseEventsNode = 0;

- return true;

- }

- m_clickCount = mouseEvent.clickCount();

- bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);

- bool swallowClickEvent = false;

- // Don't ever dispatch click events for right clicks

- if (mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)

- swallowClickEvent = dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);

- if (m_lastScrollbarUnderMouse)

- swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp();

- bool swallowMouseReleaseEvent = false;

- if (!swallowMouseUpEvent)

- swallowMouseReleaseEvent = 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 || !m_frame->document())

- return false;

- RefPtr<FrameView> protector(m_frame->view());

- m_currentMousePosition = mouseEvent.pos();

- if (m_hoverTimer.isActive())

- m_hoverTimer.stop();

-#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(m_lastScrollbarUnderMouse->transformEvent(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.

- int hitType = HitTestRequest::MouseMove;

- if (m_mousePressed && m_mouseDownMayStartSelect)

- hitType |= HitTestRequest::ReadOnly;

- if (m_mousePressed)

- hitType |= HitTestRequest::Active;

- 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 (m_frame->view())

- scrollbar = m_frame->view()->scrollbarUnderMouse(mouseEvent);

- if (!scrollbar)

- scrollbar = mev.scrollbar();

- if (m_lastScrollbarUnderMouse != scrollbar) {

- // Send mouse exited to the old scrollbar.

- if (m_lastScrollbarUnderMouse)

- m_lastScrollbarUnderMouse->mouseExited();

- m_lastScrollbarUnderMouse = m_mousePressed ? 0 : scrollbar;

- }

- 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(scrollbar->transformEvent(mouseEvent)); // Handle hover effects on platforms that support visual feedback on scrollbar hovering.

- if ((!m_resizeLayer || !m_resizeLayer->inResizeMode()) && !m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() && m_frame->view())

- m_frame->view()->setCursor(selectCursor(mev, scrollbar));

- }

- m_lastMouseMoveEventSubframe = newSubframe;

- if (swallowEvent)

- return true;

- swallowEvent = dispatchMouseEvent(eventNames().mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true);

- if (!swallowEvent)

- swallowEvent = handleMouseDraggedEvent(mev);

- return swallowEvent;

-void EventHandler::invalidateClick()

- m_clickCount = 0;

- m_clickNode = 0;

-bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)

- if (!m_frame->document())

- return false;

- RefPtr<FrameView> protector(m_frame->view());

- 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();

- }

- HitTestRequest request(HitTestRequest::MouseUp);

- MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);

- Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);

- if (subframe && passMouseReleaseEventToSubframe(mev, subframe)) {

- m_capturingMouseEventsNode = 0;

- return true;

- }

- bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);

- // Don't ever dispatch click events for right clicks

- bool swallowClickEvent = false;

- if (m_clickCount > 0 && mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)

- swallowClickEvent = 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;

-bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard)

- IntPoint contentsPos = m_frame->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 = 0;

- dragTarget->dispatchEvent(me.get(), ec);

- return me->defaultPrevented();

-bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)

- bool accept = false;

- if (!m_frame->document())

- return 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.

- if (newTarget)

- if (newTarget->hasTagName(frameTag) || newTarget->hasTagName(iframeTag))

- accept = static_cast<HTMLFrameElementBase*>(newTarget)->contentFrame()->eventHandler()->updateDragAndDrop(event, clipboard);

- else

- accept = dispatchDragEvent(eventNames().dragenterEvent, newTarget, event, clipboard);

- if (m_dragTarget) {

- Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag))

- ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0;

- if (frame)

- accept = frame->eventHandler()->updateDragAndDrop(event, clipboard);

- else

- dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);

- }

- } else {

- if (newTarget)

- if (newTarget->hasTagName(frameTag) || newTarget->hasTagName(iframeTag))

- accept = static_cast<HTMLFrameElementBase*>(newTarget)->contentFrame()->eventHandler()->updateDragAndDrop(event, clipboard);

- else

- accept = dispatchDragEvent(eventNames().dragoverEvent, newTarget, event, clipboard);

- }

- m_dragTarget = newTarget;

- return accept;

-void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)

- if (m_dragTarget) {

- Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag))

- ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0;

- if (frame)

- frame->eventHandler()->cancelDragAndDrop(event, clipboard);

- else

- dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);

- }

- clearDragState();

-bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)

- bool accept = false;

- if (m_dragTarget) {

- Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag))

- ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0;

- if (frame)

- accept = frame->eventHandler()->performDragAndDrop(event, clipboard);

- else

- accept = dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard);

- }

- clearDragState();

- return accept;

-void EventHandler::clearDragState()

- m_dragTarget = 0;

- m_capturingMouseEventsNode = 0;

-#if PLATFORM(MAC)

- m_sendingEventToSubview = false;

-#endif

-void EventHandler::setCapturingMouseEventsNode(PassRefPtr<Node> n)

- m_capturingMouseEventsNode = n;

-MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev)

- ASSERT(m_frame);

- ASSERT(m_frame->document());

- IntPoint documentPoint = m_frame->view()->windowToContents(mev.pos());

- return m_frame->document()->prepareMouseEvent(request, documentPoint, mev);

-#if ENABLE(SVG)

-static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)

- if (!referenceNode || !referenceNode->isSVGElement())

- return 0;

- Node* shadowTreeElement = referenceNode->shadowTreeRootNode();

- if (!shadowTreeElement)

- return 0;

- Node* shadowTreeParentElement = shadowTreeElement->shadowParentNode();

- 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();

- if (result)

- result = result->shadowAncestorNode();

- }

- 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)

- updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);

- bool swallowEvent = false;

- if (m_nodeUnderMouse)

- swallowEvent = m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount);

- if (!swallowEvent && eventType == eventNames().mousedownEvent) {

- // 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();

- RenderObject* renderer = node ? node->renderer() : 0;

- // Walk up the render tree to search for a node to focus.

- // Walking up the DOM tree wouldn't work for shadow trees, like those behind the engine-based text fields.

- while (renderer) {

- node = renderer->element();

- if (node && node->isFocusable()) {

- // 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->isShadowNode() ? node->shadowParentNode() : node;

- if (m_frame->selection()->isRange() &&

- m_frame->selection()->toRange()->compareNode(n, ec) == Range::NODE_INSIDE &&

- n->isDescendantOf(m_frame->document()->focusedNode()))

- return false;

- break;

- }

- renderer = renderer->parent();

- }

- // 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 (node && node->isMouseFocusable()) {

- if (!m_frame->page()->focusController()->setFocusedNode(node, m_frame))

- swallowEvent = true;

- } else if (!node || !node->focused()) {

- if (!m_frame->page()->focusController()->setFocusedNode(0, m_frame))

- swallowEvent = true;

- }

- return swallowEvent;

-bool EventHandler::handleWheelEvent(PlatformWheelEvent& e)

- Document* doc = m_frame->document();

- if (!doc)

- return false;

- RenderObject* docRenderer = doc->renderer();

- if (!docRenderer)

- return false;

- RefPtr<FrameView> protector(m_frame->view());

- IntPoint vPoint = m_frame->view()->windowToContents(e.pos());

- HitTestRequest request(HitTestRequest::ReadOnly);

- HitTestResult result(vPoint);

- doc->renderView()->layer()->hitTest(request, result);

- Node* node = result.innerNode();

- if (node) {

- // Figure out which view to send the event to.

- RenderObject* target = node->renderer();

- if (result.isOverWidget() && target && target->isWidget()) {

- Widget* widget = static_cast<RenderWidget*>(target)->widget();

- if (widget && passWheelEventToWidget(e, widget)) {

- e.accept();

- return true;

- }

- node = node->shadowAncestorNode();

- node->dispatchWheelEvent(e);

- if (e.isAccepted())

- return true;

- if (node->renderer()) {

- // Just 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).

- scrollAndAcceptEvent(e.deltaX(), ScrollLeft, ScrollRight, e, node);

- scrollAndAcceptEvent(e.deltaY(), ScrollUp, ScrollDown, e, node);

- }

- if (!e.isAccepted())

- m_frame->view()->wheelEvent(e);

- return e.isAccepted();

-bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event)

- Document* doc = m_frame->document();

- FrameView* v = m_frame->view();

- if (!doc || !v)

- return false;

- bool swallowEvent;

- IntPoint viewportPos = v->windowToContents(event.pos());

- HitTestRequest request(HitTestRequest::Active);

- MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event);

- // Context menu events shouldn't select text in GTK+ applications or in Chromium.

- // FIXME: This should probably be configurable by embedders. Consider making it a WebPreferences setting.

- // See: https://bugs.webkit.org/show_bug.cgi?id=15279

-#if !PLATFORM(GTK) && !PLATFORM(CHROMIUM)

- if (!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);

- }

-#endif

- swallowEvent = dispatchMouseEvent(eventNames().contextmenuEvent, mev.targetNode(), true, 0, event, true);

- return swallowEvent;

-void EventHandler::scheduleHoverStateUpdate()

- if (!m_hoverTimer.isActive())

- m_hoverTimer.startOneShot(0);

-// 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;

- for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) {

- if (Node* node = curr->element())

- return node->dispatchEventForType(eventNames().selectstartEvent, true, true);

- }

- return true;

-bool EventHandler::canMouseDragExtendSelect(Node* node)

- if (!node || !node->renderer())

- return true;

- for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) {

- if (Node* node = curr->element())

- return node->dispatchEventForType(eventNames().selectstartEvent, true, true);

- }

- return true;

-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()) {

- HitTestRequest request(HitTestRequest::MouseMove);

- HitTestResult result(m_frame->view()->windowToContents(m_currentMousePosition));

- renderer->layer()->hitTest(request, result);

- m_frame->document()->updateRendering();

- }

-static Node* eventTargetNodeForDocument(Document* doc)

- if (!doc)

- return 0;

- Node* node = doc->focusedNode();

- if (!node) {

- if (doc->isHTMLDocument())

- node = doc->body();

- else

- node = doc->documentElement();

- if (!node)

- return 0;

- }

- 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 (m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {

- String escKeyId = "U+001B";

- // If a key is pressed while the autoscroll/panScroll is in progress then we want to stop

- if (initialKeyEvent.keyIdentifier() == escKeyId && initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp)

- 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;

- // 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);

- return keydown->defaultHandled() || keydown->defaultPrevented();

- }

- // 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);

- bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented();

- 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;

- String key = event->keyIdentifier();

- bool isShifted = event->getModifierState("Shift");

- bool isOptioned = event->getModifierState("Alt");

- if (key == "Up") {

- m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::BACKWARD, LineGranularity, true);

- event->setDefaultHandled();

- }

- else if (key == "Down") {

- m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::FORWARD, LineGranularity, true);

- event->setDefaultHandled();

- }

- else if (key == "Left") {

- m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::LEFT, (isOptioned) ? WordGranularity : CharacterGranularity, true);

- event->setDefaultHandled();

- }

- else if (key == "Right") {

- m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::RIGHT, (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);

- // 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);

- }

-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

- IntPoint dragLocation = m_frame->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

- ASSERT(node);

- if (node->hasChildNodes() || !m_frame->view())

- return false;

- return m_frame->page() && m_frame->page()->dragController()->mayStartDragAtEventLocation(m_frame, point);

-void EventHandler::dragSourceMovedTo(const PlatformMouseEvent& 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);

-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;

-// 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

- m_frame->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(), IntPoint() + 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

- dragState().m_dragClipboard->sourceOperation(srcOp);

- // Yuck, dragSourceMovedTo() can be called 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) {

- DragController* dragController = m_frame->page() ? m_frame->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;

-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);

- if (!m_frame)

- return false;

- EventTarget* target;

- if (underlyingEvent)

- target = underlyingEvent->target();

- else

- target = eventTargetNodeForDocument(m_frame->document());

- if (!target)

- return false;

- RefPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text);

- event->setUnderlyingEvent(underlyingEvent);

- event->setIsLineBreak(isLineBreak);

- event->setIsBackTab(isBackTab);

- ExceptionCode ec;

- target->dispatchEvent(event, ec);

- return event->defaultHandled();

-#if !PLATFORM(MAC) && !PLATFORM(QT)

-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)

- String data = event->data();

- if (data == "\n") {

- if (event->isLineBreak()) {

- if (m_frame->editor()->insertLineBreak())

- event->setDefaultHandled();

- } else {

- if (m_frame->editor()->insertParagraphSeparator())

- event->setDefaultHandled();

- }

- } else {

- if (m_frame->editor()->insertTextWithoutSendingTextEvent(data, false, event))

- event->setDefaultHandled();

- }

-#if PLATFORM(QT) || PLATFORM(MAC)

-// 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)

- ScrollDirection direction = event->shiftKey() ? ScrollUp : ScrollDown;

- if (scrollOverflow(direction, ScrollByPage)) {

- event->setDefaultHandled();

- return;

- }

- FrameView* view = m_frame->view();

- if (!view)

- return;

- if (view->scroll(direction, ScrollByPage))

- event->setDefaultHandled();

-#endif

-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()

- if (Document* d = m_frame->document())

- if (Node* node = d->focusedNode())

- if (RenderObject* r = node->renderer())

- r->capsLockStateMayHaveChanged();

-unsigned EventHandler::pendingFrameUnloadEventCount()

- return m_pendingFrameUnloadEventCount;

-void EventHandler::addPendingFrameUnloadEventCount()

- m_pendingFrameUnloadEventCount += 1;

- m_frame->page()->changePendingUnloadEventCount(1);

- return;

-void EventHandler::removePendingFrameUnloadEventCount()

- ASSERT( (-1 + (int)m_pendingFrameUnloadEventCount) >= 0 );

- m_pendingFrameUnloadEventCount -= 1;

- m_frame->page()->changePendingUnloadEventCount(-1);

- return;

-void EventHandler::clearPendingFrameUnloadEventCount()

- m_frame->page()->changePendingUnloadEventCount(-((int)m_pendingFrameUnloadEventCount));

- m_pendingFrameUnloadEventCount = 0;

- return;

-void EventHandler::sendResizeEvent()

- if (Document* doc = m_frame->document())

- doc->dispatchWindowEvent(eventNames().resizeEvent, false, false);

-void EventHandler::sendScrollEvent()

- FrameView* v = m_frame->view();

- if (!v)

- return;

- v->setWasScrolledByUser(true);

- Document* doc = m_frame->document();

- if (!doc)

- return;

- doc->dispatchEventForType(eventNames().scrollEvent, true, false);

-unsigned EventHandler::pendingFrameBeforeUnloadEventCount()

- return m_pendingFrameBeforeUnloadEventCount;

-void EventHandler::addPendingFrameBeforeUnloadEventCount()

- m_pendingFrameBeforeUnloadEventCount += 1;

- m_frame->page()->changePendingBeforeUnloadEventCount(1);

- return;

-void EventHandler::removePendingFrameBeforeUnloadEventCount()

- ASSERT( (-1 + (int)m_pendingFrameBeforeUnloadEventCount) >= 0 );

- m_pendingFrameBeforeUnloadEventCount -= 1;

- m_frame->page()->changePendingBeforeUnloadEventCount(-1);

- return;

- void EventHandler::clearPendingFrameBeforeUnloadEventCount()

- m_frame->page()->changePendingBeforeUnloadEventCount(-((int)m_pendingFrameBeforeUnloadEventCount));

- m_pendingFrameBeforeUnloadEventCount = 0;

- return;

-bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar)

- if (!scrollbar || !scrollbar->enabled())

- return false;

- return scrollbar->mouseDown(mev.event());

+/*

+ *

+ * 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 "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 "HitTestRequest.h"

+#include "HitTestResult.h"

+#include "HTMLFrameSetElement.h"

+#include "HTMLFrameElementBase.h"

+#include "HTMLInputElement.h"

+#include "HTMLNames.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 "RenderFrameSet.h"

+#include "RenderWidget.h"

+#include "RenderView.h"

+#include "Scrollbar.h"

+#include "SelectionController.h"

+#include "Settings.h"

+#include "TextEvent.h"

+#include <wtf/StdLibExtras.h>

+#if ENABLE(SVG)

+#include "SVGDocument.h"

+#include "SVGElementInstance.h"

+#include "SVGNames.h"

+#include "SVGUseElement.h"

+#endif

+namespace WebCore {

+using namespace HTMLNames;

+// 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;

+// 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;

+static Frame* subframeForTargetNode(Node*);

+static Frame* subframeForHitTestResult(const MouseEventWithHitTestResults&);

+static inline void scrollAndAcceptEvent(float delta, ScrollDirection positiveDirection, ScrollDirection negativeDirection, PlatformWheelEvent& e, Node* node)

+ if (!delta)

+ return;

+ // Find the nearest enclosing box.

+ RenderBox* enclosingBox = node->renderer()->enclosingBox();

+ if (e.granularity() == ScrollByPageWheelEvent) {

+ if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPage, 1))

+ e.accept();

+ return;

+ }

+ float pixelsToScroll = delta > 0 ? delta : -delta;

+ if (e.granularity() == ScrollByLineWheelEvent)

+ pixelsToScroll *= cMouseWheelPixelsPerLineStep;

+ if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, pixelsToScroll))

+ e.accept();

+EventHandler::EventHandler(Frame* frame)

+ : m_frame(frame)

+ , m_mousePressed(false)

+ , m_mouseDownMayStartSelect(false)

+ , m_mouseDownMayStartDrag(false)

+ , m_mouseDownWasSingleClickInSelection(false)

+ , m_beganSelectingText(false)

+ , m_panScrollInProgress(false)

+ , m_hoverTimer(this, &EventHandler::hoverTimerFired)

+ , m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired)

+ , m_autoscrollRenderer(0)

+ , m_autoscrollInProgress(false)

+ , m_mouseDownMayStartAutoscroll(false)

+ , m_mouseDownWasInSubframe(false)

+#if ENABLE(SVG)

+ , m_svgPan(false)

+#endif

+ , m_resizeLayer(0)

+ , m_capturingMouseEventsNode(0)

+ , m_clickCount(0)

+ , m_mouseDownTimestamp(0)

+ , m_pendingFrameUnloadEventCount(0)

+ , m_pendingFrameBeforeUnloadEventCount(0)

+#if PLATFORM(MAC)

+ , m_mouseDownView(nil)

+ , m_sendingEventToSubview(false)

+ , m_activationEventNumber(0)

+#endif

+EventHandler::~EventHandler()

+EventHandler::EventHandlerDragState& EventHandler::dragState()

+ DEFINE_STATIC_LOCAL(EventHandlerDragState, state, ());

+ return state;

+void EventHandler::clear()

+ m_hoverTimer.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;

+ m_dragTarget = 0;

+ m_currentMousePosition = IntPoint();

+ m_mousePressNode = 0;

+ m_mousePressed = false;

+ m_capturingMouseEventsNode = 0;

+void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)

+ Node* innerNode = result.targetNode();

+ Selection newSelection;

+ if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {

+ VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));

+ if (pos.isNotNull()) {

+ newSelection = Selection(pos);

+ newSelection.expandUsingGranularity(WordGranularity);

+ }

+ if (newSelection.isRange()) {

+ m_frame->setSelectionGranularity(WordGranularity);

+ m_beganSelectingText = true;

+ if (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled())

+ newSelection.appendTrailingWhitespace();

+ }

+ if (m_frame->shouldChangeSelection(newSelection))

+ m_frame->selection()->setSelection(newSelection);

+ }

+void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)

+ if (!result.hitTestResult().isLiveLink())

+ return selectClosestWordFromMouseEvent(result);

+ Node* innerNode = result.targetNode();

+ if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {

+ Selection newSelection;

+ Element* URLElement = result.hitTestResult().URLElement();

+ VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));

+ if (pos.isNotNull() && pos.deepEquivalent().node()->isDescendantOf(URLElement))

+ newSelection = Selection::selectionFromContentsOfNode(URLElement);

+ if (newSelection.isRange()) {

+ m_frame->setSelectionGranularity(WordGranularity);

+ m_beganSelectingText = true;

+ }

+ if (m_frame->shouldChangeSelection(newSelection))

+ m_frame->selection()->setSelection(newSelection);

+ }

+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;

+ Selection newSelection;

+ VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint()));

+ if (pos.isNotNull()) {

+ newSelection = Selection(pos);

+ newSelection.expandUsingGranularity(ParagraphGranularity);

+ }

+ if (newSelection.isRange()) {

+ m_frame->setSelectionGranularity(ParagraphGranularity);

+ m_beganSelectingText = true;

+ }

+ if (m_frame->shouldChangeSelection(newSelection))

+ m_frame->selection()->setSelection(newSelection);

+ return true;

+bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)

+ if (event.event().button() != LeftButton)

+ return false;

+ 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.

+ IntPoint vPoint = m_frame->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();

+ Selection newSelection = m_frame->selection()->selection();

+ if (extendSelection && newSelection.isCaretOrRange()) {

+ m_frame->selection()->setLastChangeWasHorizontalExtension(false);

+ // See <rdar://problem/3668157> REGRESSION (Mail): shift-click deselects when selection

+ // was created right-to-left

+ Position start = newSelection.start();

+ Position end = newSelection.end();

+ short before = Range::compareBoundaryPoints(pos.node(), pos.offset(), start.node(), start.offset());

+ if (before <= 0)

+ newSelection = Selection(pos, end);

+ else

+ newSelection = Selection(start, pos);

+ if (m_frame->selectionGranularity() != CharacterGranularity)

+ newSelection.expandUsingGranularity(m_frame->selectionGranularity());

+ m_beganSelectingText = true;

+ } else {

+ newSelection = Selection(visiblePos);

+ m_frame->setSelectionGranularity(CharacterGranularity);

+ }

+ if (m_frame->shouldChangeSelection(newSelection))

+ m_frame->selection()->setSelection(newSelection);

+ return true;

+bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)

+ // Reset drag state.

+ dragState().m_dragSrc = 0;

+ 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());

+ // Careful that the drag starting logic stays in sync with eventMayStartDrag()

+ m_mouseDownMayStartDrag = singleClick;

+ m_mouseDownWasSingleClickInSelection = false;

+ 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;

+ m_dragStartPos = event.event().pos();

+ bool swallowEvent = false;

+ if (event.event().button() == LeftButton || event.event().button() == MiddleButton) {

+ m_frame->selection()->setCaretBlinkingSuspended(true);

+ 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;

+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) {

+ // If the selection is contained in a layer that can scroll, that layer should handle the autoscroll

+ // Otherwise, let the bridge handle it so the view can scroll itself.

+ RenderObject* renderer = targetNode->renderer();

+ while (renderer && (!renderer->isBox() || !toRenderBox(renderer)->canBeProgramaticallyScrolled(false))) {

+ 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()

+ || event.button() != LeftButton || event.clickCount() != 1)

+ return false;

+ bool DHTMLFlag;

+ bool UAFlag;

+ allowDHTMLDrag(DHTMLFlag, UAFlag);

+ if (!DHTMLFlag && !UAFlag)

+ return false;

+ HitTestRequest request(HitTestRequest::ReadOnly);

+ HitTestResult result(m_frame->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;

+ RenderObject* targetRenderer = targetNode->renderer();

+ if (!targetRenderer)

+ return;

+ if (!canMouseDragExtendSelect(targetNode))

+ 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.

+ Selection 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 = Selection(targetPosition);

+ }

+ newSelection.setExtent(targetPosition);

+ if (m_frame->selectionGranularity() != CharacterGranularity)

+ newSelection.expandUsingGranularity(m_frame->selectionGranularity());

+ if (m_frame->shouldChangeSelection(newSelection)) {

+ m_frame->selection()->setLastChangeWasHorizontalExtension(false);

+ m_frame->selection()->setSelection(newSelection);

+ }

+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_mouseDownMayStartDrag = false;

+ 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.

+ // 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

+ && m_dragStartPos == event.event().pos()

+ && m_frame->selection()->isRange()) {

+ Selection newSelection;

+ Node *node = event.targetNode();

+ if (node && node->isContentEditable() && node->renderer()) {

+ VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint());

+ newSelection = Selection(pos);

+ }

+ if (m_frame->shouldChangeSelection(newSelection))

+ m_frame->selection()->setSelection(newSelection);

+ handled = true;

+ }

+ m_frame->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();

+ m_frame->view()->addPanScrollIcon(m_panScrollStartPos);

+ // If we're not in the top frame we notify it that we are using the panScroll

+ if (m_frame != m_frame->page()->mainFrame())

+ m_frame->page()->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 (!m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress()) {

+ stopAutoscrollTimer();

+ return;

+ }

+#if ENABLE(PAN_SCROLLING)

+ setPanScrollCursor();

+ toRenderBox(r)->panScroll(m_panScrollStartPos);

+#endif

+ }

+void EventHandler::setPanScrollCursor()

+ // 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

+ const int noScrollRadius = 9;

+ bool east = m_panScrollStartPos.x() < (m_currentMousePosition.x() - noScrollRadius);

+ bool west = m_panScrollStartPos.x() > (m_currentMousePosition.x() + noScrollRadius);

+ bool north = m_panScrollStartPos.y() > (m_currentMousePosition.y() + noScrollRadius);

+ bool south = m_panScrollStartPos.y() < (m_currentMousePosition.y() - noScrollRadius);

+ if (north) {

+ if (east)

+ m_frame->view()->setCursor(northEastPanningCursor());

+ else if (west)

+ m_frame->view()->setCursor(northWestPanningCursor());

+ else

+ m_frame->view()->setCursor(northPanningCursor());

+ } else if (south) {

+ if (east)

+ m_frame->view()->setCursor(southEastPanningCursor());

+ else if (west)

+ m_frame->view()->setCursor(southWestPanningCursor());

+ else

+ m_frame->view()->setCursor(southPanningCursor());

+ } else if (east)

+ m_frame->view()->setCursor(eastPanningCursor());

+ else if (west)

+ m_frame->view()->setCursor(westPanningCursor());

+ else

+ m_frame->view()->setCursor(middlePanningCursor());

+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 && (!m_autoscrollRenderer->isBox() || !toRenderBox(m_autoscrollRenderer)->canBeProgramaticallyScrolled(false)))

+ m_autoscrollRenderer = m_autoscrollRenderer->parent();

+void EventHandler::setAutoscrollRenderer(RenderObject* renderer)

+ m_autoscrollRenderer = renderer;

+void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const

+ if (!m_frame || !m_frame->document()) {

+ flagDHTML = false;

+ flagUA = false;

+ return;

+ }

+ unsigned mask = m_frame->page()->dragController()->delegateDragSourceAction(m_frame->view()->contentsToWindow(m_mouseDownPos));

+ flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone;

+ flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection));

+HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent, bool ignoreClipping)

+ HitTestResult result(point);

+ if (!m_frame->contentRenderer())

+ return result;

+ int hitType = HitTestRequest::ReadOnly | HitTestRequest::Active;

+ 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 = static_cast<RenderWidget*>(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);

+ frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), widgetHitTestResult);

+ result = widgetHitTestResult;

+ }

+ // 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;

+ Frame* mainFrame = m_frame->page()->mainFrame();

+ if (m_frame != mainFrame && resultFrame && resultFrame != mainFrame && !resultFrame->editor()->insideVisibleArea(result.point())) {

+ IntPoint windowPoint = resultFrame->view()->contentsToWindow(result.point());

+ IntPoint mainFramePoint = mainFrame->view()->windowToContents(windowPoint);

+ result = mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping);

+ }

+ 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) {

+ m_frame->view()->removePanScrollIcon();

+ m_frame->view()->setCursor(pointerCursor());

+ }

+#endif

+ setAutoscrollRenderer(0);

+ }

+ m_autoscrollTimer.stop();

+ m_panScrollInProgress = false;

+ // If we're not in the top frame we notify it that we are not using the panScroll anymore

+ if (m_frame->page() && m_frame != m_frame->page()->mainFrame())

+ m_frame->page()->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)

+ if (!m_frame->document())

+ return false;

+ Node* node = m_frame->document()->focusedNode();

+ if (!node)

+ node = m_mousePressNode.get();

+ if (node) {

+ RenderObject* r = node->renderer();

+ if (r && !r->isListBox())

+ return r->enclosingBox()->scroll(direction, granularity);

+ }

+ return false;

+IntPoint EventHandler::currentMousePosition() const

+ return m_currentMousePosition;

+Frame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)

+ if (!hitTestResult.isOverWidget())

+ return 0;

+ return subframeForTargetNode(hitTestResult.targetNode());

+Frame* subframeForTargetNode(Node* node)

+ if (!node)

+ return 0;

+ RenderObject* renderer = node->renderer();

+ if (!renderer || !renderer->isWidget())

+ return 0;

+ Widget* widget = static_cast<RenderWidget*>(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)->inputType() == HTMLInputElement::IMAGE;

+// 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)

+ // 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 iBeamCursor();

+ Node* node = event.targetNode();

+ RenderObject* renderer = node ? node->renderer() : 0;

+ RenderStyle* style = renderer ? renderer->style() : 0;

+ if (renderer && renderer->isFrameSet()) {

+ RenderFrameSet* fs = static_cast<RenderFrameSet*>(renderer);

+ if (fs->canResizeRow(event.localPoint()))

+ return rowResizeCursor();

+ if (fs->canResizeColumn(event.localPoint()))

+ return columnResizeCursor();

+ }

+ if (style && style->cursors()) {

+ const CursorList* cursors = style->cursors();

+ for (unsigned i = 0; i < cursors->size(); ++i) {

+ CachedImage* cimage = (*cursors)[i].cursorImage.get();

+ IntPoint hotSpot = (*cursors)[i].hotSpot;

+ if (!cimage)

+ continue;

+ // 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;

+ // Do not let the hotspot be outside the bounds of the image.

+ if (hotSpot.x() < 0 || hotSpot.y() < 0 || hotSpot.x() > size.width() || hotSpot.y() > size.height())

+ 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();

+ RenderLayer* layer = renderer ? renderer->enclosingLayer() : 0;

+ bool inResizer = false;

+ if (m_frame->view() && layer && layer->isPointInResizeControl(m_frame->view()->windowToContents(event.event().pos())))

+ inResizer = true;

+ if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar)

+ return iBeamCursor();

+ 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();

+bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)

+ if (!m_frame->document())

+ return false;

+ RefPtr<FrameView> protector(m_frame->view());

+ m_mousePressed = true;

+ m_currentMousePosition = mouseEvent.pos();

+ m_mouseDownTimestamp = mouseEvent.timestamp();

+ m_mouseDownMayStartDrag = false;

+ m_mouseDownMayStartSelect = false;

+ m_mouseDownMayStartAutoscroll = false;

+ m_mouseDownPos = m_frame->view()->windowToContents(mouseEvent.pos());

+ m_mouseDownWasInSubframe = false;

+ HitTestRequest request(HitTestRequest::Active);

+ MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);

+ if (!mev.targetNode()) {

+ invalidateClick();

+ return false;

+ }

+ m_mousePressNode = mev.targetNode();

+ InspectorController* inspector = m_frame->page()->inspectorController();

+ if (inspector && inspector->enabled() && inspector->searchingForNodeInPage()) {

+ inspector->handleMousePressOnNode(m_mousePressNode.get());

+ invalidateClick();

+ return true;

+ }

+ 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.

+ if (m_mousePressed)

+ m_capturingMouseEventsNode = mev.targetNode();

+ invalidateClick();

+ return true;

+ }

+#if ENABLE(PAN_SCROLLING)

+ if (m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {

+ stopAutoscrollTimer();

+ invalidateClick();

+ return true;

+ }

+ if (mouseEvent.button() == MiddleButton && !mev.isOverLink()) {

+ RenderObject* renderer = mev.targetNode()->renderer();

+ while (renderer && (!renderer->isBox() || !toRenderBox(renderer)->canBeProgramaticallyScrolled(false))) {

+ if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement())

+ renderer = renderer->document()->ownerElement()->renderer();

+ else

+ renderer = renderer->parent();

+ }

+ if (renderer) {

+ m_panScrollInProgress = true;

+ handleAutoscroll(renderer);

+ invalidateClick();

+ return true;

+ }

+#endif

+ m_clickCount = mouseEvent.clickCount();

+ m_clickNode = mev.targetNode();

+ RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0;

+ IntPoint p = m_frame->view()->windowToContents(mouseEvent.pos());

+ if (layer && layer->isPointInResizeControl(p)) {

+ layer->setInResizeMode(true);

+ m_resizeLayer = layer;

+ m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p);

+ invalidateClick();

+ return true;

+ }

+ bool swallowEvent = dispatchMouseEvent(eventNames().mousedownEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);

+ // 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 = prepareMouseEvent(request, mouseEvent);

+ if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())

+ m_lastScrollbarUnderMouse = 0;

+ }

+ if (swallowEvent) {

+ // scrollbars should get events anyway, even disabled controls might be scrollable

+ if (mev.scrollbar())

+ passMousePressEventToScrollbar(mev, 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()->isShadowNode() && mev.targetNode()->shadowParentNode()->hasTagName(inputTag)) {

+ HitTestRequest request(HitTestRequest::ReadOnly |

+ HitTestRequest::Active);

+ mev = prepareMouseEvent(request, mouseEvent);

+ }

+ Scrollbar* scrollbar = m_frame->view()->scrollbarUnderMouse(mouseEvent);

+ if (!scrollbar)

+ scrollbar = mev.scrollbar();

+ 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)

+ if (!m_frame->document())

+ return false;

+ RefPtr<FrameView> protector(m_frame->view());

+ // 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 (subframe && passMousePressEventToSubframe(mev, subframe)) {

+ m_capturingMouseEventsNode = 0;

+ return true;

+ }

+ m_clickCount = mouseEvent.clickCount();

+ bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);

+ bool swallowClickEvent = false;

+ // Don't ever dispatch click events for right clicks

+ if (mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)

+ swallowClickEvent = dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);

+ if (m_lastScrollbarUnderMouse)

+ swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp();

+ bool swallowMouseReleaseEvent = false;

+ if (!swallowMouseUpEvent)

+ swallowMouseReleaseEvent = 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 || !m_frame->document())

+ return false;

+ RefPtr<FrameView> protector(m_frame->view());

+ m_currentMousePosition = mouseEvent.pos();

+ if (m_hoverTimer.isActive())

+ m_hoverTimer.stop();

+#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(m_lastScrollbarUnderMouse->transformEvent(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.

+ int hitType = HitTestRequest::MouseMove;

+ if (m_mousePressed && m_mouseDownMayStartSelect)

+ hitType |= HitTestRequest::ReadOnly;

+ if (m_mousePressed)

+ hitType |= HitTestRequest::Active;

+ 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 (m_frame->view())

+ scrollbar = m_frame->view()->scrollbarUnderMouse(mouseEvent);

+ if (!scrollbar)

+ scrollbar = mev.scrollbar();

+ if (m_lastScrollbarUnderMouse != scrollbar) {

+ // Send mouse exited to the old scrollbar.

+ if (m_lastScrollbarUnderMouse)

+ m_lastScrollbarUnderMouse->mouseExited();

+ m_lastScrollbarUnderMouse = m_mousePressed ? 0 : scrollbar;

+ }

+ 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(scrollbar->transformEvent(mouseEvent)); // Handle hover effects on platforms that support visual feedback on scrollbar hovering.

+ if ((!m_resizeLayer || !m_resizeLayer->inResizeMode()) && !m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() && m_frame->view())

+ m_frame->view()->setCursor(selectCursor(mev, scrollbar));

+ }

+ m_lastMouseMoveEventSubframe = newSubframe;

+ if (swallowEvent)

+ return true;

+ swallowEvent = dispatchMouseEvent(eventNames().mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true);

+ if (!swallowEvent)

+ swallowEvent = handleMouseDraggedEvent(mev);

+ return swallowEvent;

+void EventHandler::invalidateClick()

+ m_clickCount = 0;

+ m_clickNode = 0;

+bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)

+ if (!m_frame->document())

+ return false;

+ RefPtr<FrameView> protector(m_frame->view());

+ 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();

+ }

+ HitTestRequest request(HitTestRequest::MouseUp);

+ MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);

+ Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);

+ if (subframe && passMouseReleaseEventToSubframe(mev, subframe)) {

+ m_capturingMouseEventsNode = 0;

+ return true;

+ }

+ bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);

+ // Don't ever dispatch click events for right clicks

+ bool swallowClickEvent = false;

+ if (m_clickCount > 0 && mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)

+ swallowClickEvent = 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;

+bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard)

+ IntPoint contentsPos = m_frame->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 = 0;

+ EventTargetNodeCast(dragTarget)->dispatchEvent(me.get(), ec);

+ return me->defaultPrevented();

+bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)

+ bool accept = false;

+ if (!m_frame->document())

+ return 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.

+ if (newTarget)

+ if (newTarget->hasTagName(frameTag) || newTarget->hasTagName(iframeTag))

+ accept = static_cast<HTMLFrameElementBase*>(newTarget)->contentFrame()->eventHandler()->updateDragAndDrop(event, clipboard);

+ else

+ accept = dispatchDragEvent(eventNames().dragenterEvent, newTarget, event, clipboard);

+ if (m_dragTarget) {

+ Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag))

+ ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0;

+ if (frame)

+ accept = frame->eventHandler()->updateDragAndDrop(event, clipboard);

+ else

+ dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);

+ }

+ } else {

+ if (newTarget)

+ if (newTarget->hasTagName(frameTag) || newTarget->hasTagName(iframeTag))

+ accept = static_cast<HTMLFrameElementBase*>(newTarget)->contentFrame()->eventHandler()->updateDragAndDrop(event, clipboard);

+ else

+ accept = dispatchDragEvent(eventNames().dragoverEvent, newTarget, event, clipboard);

+ }

+ m_dragTarget = newTarget;

+ return accept;

+void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)

+ if (m_dragTarget) {

+ Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag))

+ ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0;

+ if (frame)

+ frame->eventHandler()->cancelDragAndDrop(event, clipboard);

+ else

+ dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);

+ }

+ clearDragState();

+bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)

+ bool accept = false;

+ if (m_dragTarget) {

+ Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag))

+ ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0;

+ if (frame)

+ accept = frame->eventHandler()->performDragAndDrop(event, clipboard);

+ else

+ accept = dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard);

+ }

+ clearDragState();

+ return accept;

+void EventHandler::clearDragState()

+ m_dragTarget = 0;

+ m_capturingMouseEventsNode = 0;

+#if PLATFORM(MAC)

+ m_sendingEventToSubview = false;

+#endif

+void EventHandler::setCapturingMouseEventsNode(PassRefPtr<Node> n)

+ m_capturingMouseEventsNode = n;

+MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev)

+ ASSERT(m_frame);

+ ASSERT(m_frame->document());

+ IntPoint documentPoint = m_frame->view()->windowToContents(mev.pos());

+ return m_frame->document()->prepareMouseEvent(request, documentPoint, mev);

+#if ENABLE(SVG)

+static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)

+ if (!referenceNode || !referenceNode->isSVGElement())

+ return 0;

+ Node* shadowTreeElement = referenceNode->shadowTreeRootNode();

+ if (!shadowTreeElement)

+ return 0;

+ Node* shadowTreeParentElement = shadowTreeElement->shadowParentNode();

+ 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();

+ if (result)

+ result = result->shadowAncestorNode();

+ }

+ 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)

+ EventTargetNodeCast(m_lastNodeUnderMouse.get())->dispatchMouseEvent(mouseEvent, eventNames().mouseoutEvent, 0, m_nodeUnderMouse.get());

+ // send mouseover event to the new node

+ if (m_nodeUnderMouse)

+ EventTargetNodeCast(m_nodeUnderMouse.get())->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)

+ updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);

+ bool swallowEvent = false;

+ if (m_nodeUnderMouse)

+ swallowEvent = EventTargetNodeCast(m_nodeUnderMouse.get())->dispatchMouseEvent(mouseEvent, eventType, clickCount);

+ if (!swallowEvent && eventType == eventNames().mousedownEvent) {

+ // 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();

+ RenderObject* renderer = node ? node->renderer() : 0;

+ // Walk up the render tree to search for a node to focus.

+ // Walking up the DOM tree wouldn't work for shadow trees, like those behind the engine-based text fields.

+ while (renderer) {

+ node = renderer->element();

+ if (node && node->isFocusable()) {

+ // 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->isShadowNode() ? node->shadowParentNode() : node;

+ if (m_frame->selection()->isRange() &&

+ m_frame->selection()->toRange()->compareNode(n, ec) == Range::NODE_INSIDE &&

+ n->isDescendantOf(m_frame->document()->focusedNode()))

+ return false;

+ break;

+ }

+ renderer = renderer->parent();

+ }

+ // 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 (node && node->isMouseFocusable()) {

+ if (!m_frame->page()->focusController()->setFocusedNode(node, m_frame))

+ swallowEvent = true;

+ } else if (!node || !node->focused()) {

+ if (!m_frame->page()->focusController()->setFocusedNode(0, m_frame))

+ swallowEvent = true;

+ }

+ return swallowEvent;

+bool EventHandler::handleWheelEvent(PlatformWheelEvent& e)

+ Document* doc = m_frame->document();

+ if (!doc)

+ return false;

+ RenderObject* docRenderer = doc->renderer();

+ if (!docRenderer)

+ return false;

+ RefPtr<FrameView> protector(m_frame->view());

+ IntPoint vPoint = m_frame->view()->windowToContents(e.pos());

+ HitTestRequest request(HitTestRequest::ReadOnly);

+ HitTestResult result(vPoint);

+ doc->renderView()->layer()->hitTest(request, result);

+ Node* node = result.innerNode();

+ if (node) {

+ // Figure out which view to send the event to.

+ RenderObject* target = node->renderer();

+ if (result.isOverWidget() && target && target->isWidget()) {

+ Widget* widget = static_cast<RenderWidget*>(target)->widget();

+ if (widget && passWheelEventToWidget(e, widget)) {

+ e.accept();

+ return true;

+ }

+ node = node->shadowAncestorNode();

+ EventTargetNodeCast(node)->dispatchWheelEvent(e);

+ if (e.isAccepted())

+ return true;

+ if (node->renderer()) {

+ // Just 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).

+ scrollAndAcceptEvent(e.deltaX(), ScrollLeft, ScrollRight, e, node);

+ scrollAndAcceptEvent(e.deltaY(), ScrollUp, ScrollDown, e, node);

+ }

+ if (!e.isAccepted())

+ m_frame->view()->wheelEvent(e);

+ return e.isAccepted();

+bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event)

+ Document* doc = m_frame->document();

+ FrameView* v = m_frame->view();

+ if (!doc || !v)

+ return false;

+ bool swallowEvent;

+ IntPoint viewportPos = v->windowToContents(event.pos());

+ HitTestRequest request(HitTestRequest::Active);

+ MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event);

+ // Context menu events shouldn't select text in GTK+ applications or in Chromium.

+ // FIXME: This should probably be configurable by embedders. Consider making it a WebPreferences setting.

+ // See: https://bugs.webkit.org/show_bug.cgi?id=15279

+#if !PLATFORM(GTK) && !PLATFORM(CHROMIUM)

+ if (!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);

+ }

+#endif

+ swallowEvent = dispatchMouseEvent(eventNames().contextmenuEvent, mev.targetNode(), true, 0, event, true);

+ return swallowEvent;

+void EventHandler::scheduleHoverStateUpdate()

+ if (!m_hoverTimer.isActive())

+ m_hoverTimer.startOneShot(0);

+// 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;

+ for (RenderObject* curr = node->renderer(); curr; curr = curr->parent())

+ if (Node* node = curr->element())

+ return EventTargetNodeCast(node)->dispatchEventForType(eventNames().selectstartEvent, true, true);

+ return true;

+bool EventHandler::canMouseDragExtendSelect(Node* node)

+ if (!node || !node->renderer())

+ return true;

+ for (RenderObject* curr = node->renderer(); curr; curr = curr->parent())

+ if (Node* node = curr->element())

+ return EventTargetNodeCast(node)->dispatchEventForType(eventNames().selectstartEvent, true, true);

+ return true;

+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()) {

+ HitTestRequest request(HitTestRequest::MouseMove);

+ HitTestResult result(m_frame->view()->windowToContents(m_currentMousePosition));

+ renderer->layer()->hitTest(request, result);

+ m_frame->document()->updateRendering();

+ }

+static EventTargetNode* eventTargetNodeForDocument(Document* doc)

+ if (!doc)

+ return 0;

+ Node* node = doc->focusedNode();

+ if (!node) {

+ if (doc->isHTMLDocument())

+ node = doc->body();

+ else

+ node = doc->documentElement();

+ if (!node)

+ return 0;

+ }

+ return EventTargetNodeCast(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 (m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {

+ String escKeyId = "U+001B";

+ // If a key is pressed while the autoscroll/panScroll is in progress then we want to stop

+ if (initialKeyEvent.keyIdentifier() == escKeyId && initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp)

+ 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<EventTargetNode> node = eventTargetNodeForDocument(m_frame->document());

+ if (!node)

+ return false;

+ // 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);

+ return keydown->defaultHandled() || keydown->defaultPrevented();

+ }

+ // 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);

+ bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented();

+ 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;

+ String key = event->keyIdentifier();

+ bool isShifted = event->getModifierState("Shift");

+ bool isOptioned = event->getModifierState("Alt");

+ if (key == "Up") {

+ m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::BACKWARD, LineGranularity, true);

+ event->setDefaultHandled();

+ }

+ else if (key == "Down") {

+ m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::FORWARD, LineGranularity, true);

+ event->setDefaultHandled();

+ }

+ else if (key == "Left") {

+ m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::LEFT, (isOptioned) ? WordGranularity : CharacterGranularity, true);

+ event->setDefaultHandled();

+ }

+ else if (key == "Right") {

+ m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::RIGHT, (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);

+ // 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);

+ }

+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

+ IntPoint dragLocation = m_frame->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

+ ASSERT(node);

+ if (node->hasChildNodes() || !m_frame->view())

+ return false;

+ return m_frame->page() && m_frame->page()->dragController()->mayStartDragAtEventLocation(m_frame, point);

+void EventHandler::dragSourceMovedTo(const PlatformMouseEvent& 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);

+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;

+// 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

+ m_frame->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(), IntPoint() + 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

+ dragState().m_dragClipboard->sourceOperation(srcOp);

+ // Yuck, dragSourceMovedTo() can be called 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) {

+ DragController* dragController = m_frame->page() ? m_frame->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;

+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);

+ if (!m_frame)

+ return false;

+ EventTarget* target;

+ if (underlyingEvent)

+ target = underlyingEvent->target();

+ else

+ target = eventTargetNodeForDocument(m_frame->document());

+ if (!target)

+ return false;

+ RefPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text);

+ event->setUnderlyingEvent(underlyingEvent);

+ event->setIsLineBreak(isLineBreak);

+ event->setIsBackTab(isBackTab);

+ ExceptionCode ec;

+ target->dispatchEvent(event, ec);

+ return event->defaultHandled();

+#if !PLATFORM(MAC) && !PLATFORM(QT)

+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)

+ String data = event->data();

+ if (data == "\n") {

+ if (event->isLineBreak()) {

+ if (m_frame->editor()->insertLineBreak())

+ event->setDefaultHandled();

+ } else {

+ if (m_frame->editor()->insertParagraphSeparator())

+ event->setDefaultHandled();

+ }

+ } else {

+ if (m_frame->editor()->insertTextWithoutSendingTextEvent(data, false, event))

+ event->setDefaultHandled();

+ }

+#if PLATFORM(QT) || PLATFORM(MAC)

+// 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)

+ ScrollDirection direction = event->shiftKey() ? ScrollUp : ScrollDown;

+ if (scrollOverflow(direction, ScrollByPage)) {

+ event->setDefaultHandled();

+ return;

+ }

+ FrameView* view = m_frame->view();

+ if (!view)

+ return;

+ if (view->scroll(direction, ScrollByPage))

+ event->setDefaultHandled();

+#endif

+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()

+ if (Document* d = m_frame->document())

+ if (Node* node = d->focusedNode())

+ if (RenderObject* r = node->renderer())

+ r->capsLockStateMayHaveChanged();

+unsigned EventHandler::pendingFrameUnloadEventCount()

+ return m_pendingFrameUnloadEventCount;

+void EventHandler::addPendingFrameUnloadEventCount()

+ m_pendingFrameUnloadEventCount += 1;

+ m_frame->page()->changePendingUnloadEventCount(1);

+ return;

+void EventHandler::removePendingFrameUnloadEventCount()

+ ASSERT( (-1 + (int)m_pendingFrameUnloadEventCount) >= 0 );

+ m_pendingFrameUnloadEventCount -= 1;

+ m_frame->page()->changePendingUnloadEventCount(-1);

+ return;

+void EventHandler::clearPendingFrameUnloadEventCount()

+ m_frame->page()->changePendingUnloadEventCount(-((int)m_pendingFrameUnloadEventCount));

+ m_pendingFrameUnloadEventCount = 0;

+ return;

+void EventHandler::sendResizeEvent()

+ if (Document* doc = m_frame->document())

+ doc->dispatchWindowEvent(eventNames().resizeEvent, false, false);

+void EventHandler::sendScrollEvent()

+ FrameView* v = m_frame->view();

+ if (!v)

+ return;

+ v->setWasScrolledByUser(true);

+ Document* doc = m_frame->document();

+ if (!doc)

+ return;

+ doc->dispatchEventForType(eventNames().scrollEvent, true, false);

+unsigned EventHandler::pendingFrameBeforeUnloadEventCount()

+ return m_pendingFrameBeforeUnloadEventCount;

+void EventHandler::addPendingFrameBeforeUnloadEventCount()

+ m_pendingFrameBeforeUnloadEventCount += 1;

+ m_frame->page()->changePendingBeforeUnloadEventCount(1);

+ return;

+void EventHandler::removePendingFrameBeforeUnloadEventCount()

+ ASSERT( (-1 + (int)m_pendingFrameBeforeUnloadEventCount) >= 0 );

+ m_pendingFrameBeforeUnloadEventCount -= 1;

+ m_frame->page()->changePendingBeforeUnloadEventCount(-1);

+ return;

+ void EventHandler::clearPendingFrameBeforeUnloadEventCount()

+ m_frame->page()->changePendingBeforeUnloadEventCount(-((int)m_pendingFrameBeforeUnloadEventCount));

+ m_pendingFrameBeforeUnloadEventCount = 0;

+ return;

+bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar)

+ if (!scrollbar || !scrollbar->enabled())

+ return false;

+ return scrollbar->mouseDown(mev.event());

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