--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/page/EventHandler.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,3145 @@
+/*
+ * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "EventHandler.h"
+
+#include "AXObjectCache.h"
+#include "CachedImage.h"
+#include "Chrome.h"
+#include "ChromeClient.h"
+#include "Cursor.h"
+#include "Document.h"
+#include "DragController.h"
+#include "Editor.h"
+#include "EventNames.h"
+#include "FloatPoint.h"
+#include "FloatRect.h"
+#include "FocusController.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameTree.h"
+#include "FrameView.h"
+#include "HTMLFrameElementBase.h"
+#include "HTMLFrameSetElement.h"
+#include "HTMLInputElement.h"
+#include "HTMLNames.h"
+#include "HitTestRequest.h"
+#include "HitTestResult.h"
+#include "Image.h"
+#include "InspectorController.h"
+#include "KeyboardEvent.h"
+#include "MouseEvent.h"
+#include "MouseEventWithHitTestResults.h"
+#include "Page.h"
+#include "PlatformKeyboardEvent.h"
+#include "PlatformWheelEvent.h"
+#include "PluginDocument.h"
+#include "RenderFrameSet.h"
+#include "RenderLayer.h"
+#include "RenderTextControlSingleLine.h"
+#include "RenderView.h"
+#include "RenderWidget.h"
+#include "Scrollbar.h"
+#include "SelectionController.h"
+#include "Settings.h"
+#include "TextEvent.h"
+#include "TextIterator.h"
+#include "UserGestureIndicator.h"
+#include "WheelEvent.h"
+#include "htmlediting.h" // for comparePositions()
+#include <wtf/CurrentTime.h>
+#include <wtf/StdLibExtras.h>
+
+#if ENABLE(SVG)
+#include "SVGDocument.h"
+#include "SVGElementInstance.h"
+#include "SVGNames.h"
+#include "SVGUseElement.h"
+#endif
+
+#if ENABLE(TOUCH_EVENTS)
+#include "PlatformTouchEvent.h"
+#include "TouchEvent.h"
+
+#if ENABLE(TRANSFORMACTION_EVENTS)
+#include "TransformActionEvent.h"
+#endif
+#endif
+
+#if ENABLE(HAPTICS)
+#include "PlatformHaptics.h"
+#endif
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+#if ENABLE(DRAG_SUPPORT)
+// The link drag hysteresis is much larger than the others because there
+// needs to be enough space to cancel the link press without starting a link drag,
+// and because dragging links is rare.
+const int LinkDragHysteresis = 40;
+const int ImageDragHysteresis = 5;
+const int TextDragHysteresis = 3;
+const int GeneralDragHysteresis = 3;
+#endif // ENABLE(DRAG_SUPPORT)
+
+// Match key code of composition keydown event on windows.
+// IE sends VK_PROCESSKEY which has value 229;
+const int CompositionEventKeyCode = 229;
+
+#if ENABLE(SVG)
+using namespace SVGNames;
+#endif
+
+// When the autoscroll or the panScroll is triggered when do the scroll every 0.05s to make it smooth
+const double autoscrollInterval = 0.05;
+
+const double fakeMouseMoveInterval = 0.1;
+
+static Frame* subframeForHitTestResult(const MouseEventWithHitTestResults&);
+
+static inline bool scrollNode(float delta, WheelEvent::Granularity granularity, ScrollDirection positiveDirection, ScrollDirection negativeDirection, Node* node, Node** stopNode)
+{
+ if (!delta)
+ return false;
+
+ if (!node->renderer())
+ return false;
+
+ // Find the nearest enclosing box.
+ RenderBox* enclosingBox = node->renderer()->enclosingBox();
+
+ float absDelta = delta > 0 ? delta : -delta;
+
+ if (granularity == WheelEvent::Page)
+ return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPage, absDelta, stopNode);
+
+ if (granularity == WheelEvent::Line)
+ return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByLine, absDelta, stopNode);
+
+ if (granularity == WheelEvent::Pixel)
+ return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, absDelta, stopNode);
+
+ return false;
+}
+
+#if !PLATFORM(MAC)
+
+inline bool EventHandler::eventLoopHandleMouseUp(const MouseEventWithHitTestResults&)
+{
+ return false;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+inline bool EventHandler::eventLoopHandleMouseDragged(const MouseEventWithHitTestResults&)
+{
+ return false;
+}
+#endif
+
+#endif
+
+EventHandler::EventHandler(Frame* frame)
+ : m_frame(frame)
+ , m_mousePressed(false)
+ , m_capturesDragging(false)
+ , m_mouseDownMayStartSelect(false)
+#if ENABLE(DRAG_SUPPORT)
+ , m_mouseDownMayStartDrag(false)
+#endif
+ , m_mouseDownWasSingleClickInSelection(false)
+ , m_beganSelectingText(false)
+ , m_panScrollInProgress(false)
+ , m_panScrollButtonPressed(false)
+ , m_springLoadedPanScrollInProgress(false)
+ , m_hoverTimer(this, &EventHandler::hoverTimerFired)
+ , m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired)
+ , m_autoscrollRenderer(0)
+ , m_autoscrollInProgress(false)
+ , m_mouseDownMayStartAutoscroll(false)
+ , m_mouseDownWasInSubframe(false)
+ , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired)
+#if ENABLE(SVG)
+ , m_svgPan(false)
+#endif
+ , m_resizeLayer(0)
+ , m_eventHandlerWillResetCapturingMouseEventsNode(0)
+ , m_clickCount(0)
+ , m_mouseDownTimestamp(0)
+ , m_useLatchedWheelEventNode(false)
+ , m_widgetIsLatched(false)
+#if PLATFORM(MAC)
+ , m_mouseDownView(nil)
+ , m_sendingEventToSubview(false)
+ , m_activationEventNumber(0)
+#endif
+#if ENABLE(TOUCH_EVENTS)
+ , m_touchPressed(false)
+#endif
+#if ENABLE(HAPTICS)
+ , m_firstTouchedNode(0)
+ , m_hapticFeedbackCancelled(false)
+#endif
+{
+#if ENABLE(HAPTICS)
+ initHaptics();
+#endif
+}
+
+EventHandler::~EventHandler()
+{
+ ASSERT(!m_fakeMouseMoveEventTimer.isActive());
+}
+
+#if ENABLE(DRAG_SUPPORT)
+EventHandler::EventHandlerDragState& EventHandler::dragState()
+{
+ DEFINE_STATIC_LOCAL(EventHandlerDragState, state, ());
+ return state;
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+void EventHandler::clear()
+{
+ m_hoverTimer.stop();
+ m_fakeMouseMoveEventTimer.stop();
+ m_resizeLayer = 0;
+ m_nodeUnderMouse = 0;
+ m_lastNodeUnderMouse = 0;
+#if ENABLE(SVG)
+ m_instanceUnderMouse = 0;
+ m_lastInstanceUnderMouse = 0;
+#endif
+ m_lastMouseMoveEventSubframe = 0;
+ m_lastScrollbarUnderMouse = 0;
+ m_clickCount = 0;
+ m_clickNode = 0;
+ m_frameSetBeingResized = 0;
+#if ENABLE(DRAG_SUPPORT)
+ m_dragTarget = 0;
+ m_shouldOnlyFireDragOverEvent = false;
+#endif
+ m_currentMousePosition = IntPoint();
+ m_mousePressNode = 0;
+ m_mousePressed = false;
+ m_capturesDragging = false;
+ m_capturingMouseEventsNode = 0;
+ m_latchedWheelEventNode = 0;
+ m_previousWheelScrolledNode = 0;
+#if ENABLE(TOUCH_EVENTS)
+ m_originatingTouchPointTargets.clear();
+#endif
+}
+
+void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)
+{
+ Node* innerNode = result.targetNode();
+ VisibleSelection newSelection;
+
+ if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
+ VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
+ TextGranularity granularity = CharacterGranularity;
+ if (pos.isNotNull()) {
+ newSelection = VisibleSelection(pos);
+ newSelection.expandUsingGranularity(WordGranularity);
+ }
+
+ if (newSelection.isRange()) {
+ granularity = WordGranularity;
+ m_beganSelectingText = true;
+ if (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled())
+ newSelection.appendTrailingWhitespace();
+ }
+
+ if (m_frame->shouldChangeSelection(newSelection))
+ m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+ }
+}
+
+void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)
+{
+ if (!result.hitTestResult().isLiveLink())
+ return selectClosestWordFromMouseEvent(result);
+
+ Node* innerNode = result.targetNode();
+
+ if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
+ VisibleSelection newSelection;
+ Element* URLElement = result.hitTestResult().URLElement();
+ VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
+ if (pos.isNotNull() && pos.deepEquivalent().node()->isDescendantOf(URLElement))
+ newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement);
+
+ TextGranularity granularity = CharacterGranularity;
+ if (newSelection.isRange()) {
+ granularity = WordGranularity;
+ m_beganSelectingText = true;
+ }
+
+ if (m_frame->shouldChangeSelection(newSelection))
+ m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+ }
+}
+
+bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)
+{
+ if (event.event().button() != LeftButton)
+ return false;
+
+ if (m_frame->selection()->isRange())
+ // A double-click when range is already selected
+ // should not change the selection. So, do not call
+ // selectClosestWordFromMouseEvent, but do set
+ // m_beganSelectingText to prevent handleMouseReleaseEvent
+ // from setting caret selection.
+ m_beganSelectingText = true;
+ else
+ selectClosestWordFromMouseEvent(event);
+
+ return true;
+}
+
+bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event)
+{
+ if (event.event().button() != LeftButton)
+ return false;
+
+ Node* innerNode = event.targetNode();
+ if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
+ return false;
+
+ VisibleSelection newSelection;
+ VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint()));
+ if (pos.isNotNull()) {
+ newSelection = VisibleSelection(pos);
+ newSelection.expandUsingGranularity(ParagraphGranularity);
+ }
+
+ TextGranularity granularity = CharacterGranularity;
+ if (newSelection.isRange()) {
+ granularity = ParagraphGranularity;
+ m_beganSelectingText = true;
+ }
+
+ if (m_frame->shouldChangeSelection(newSelection))
+ m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+
+ return true;
+}
+
+static int textDistance(const Position& start, const Position& end)
+{
+ RefPtr<Range> range = Range::create(start.node()->document(), start, end);
+ return TextIterator::rangeLength(range.get(), true);
+}
+
+bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)
+{
+ Node* innerNode = event.targetNode();
+ if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
+ return false;
+
+ // Extend the selection if the Shift key is down, unless the click is in a link.
+ bool extendSelection = event.event().shiftKey() && !event.isOverLink();
+
+ // Don't restart the selection when the mouse is pressed on an
+ // existing selection so we can allow for text dragging.
+ if (FrameView* view = m_frame->view()) {
+ IntPoint vPoint = view->windowToContents(event.event().pos());
+ if (!extendSelection && m_frame->selection()->contains(vPoint)) {
+ m_mouseDownWasSingleClickInSelection = true;
+ return false;
+ }
+ }
+
+ VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint()));
+ if (visiblePos.isNull())
+ visiblePos = VisiblePosition(innerNode, 0, DOWNSTREAM);
+ Position pos = visiblePos.deepEquivalent();
+
+ VisibleSelection newSelection = m_frame->selection()->selection();
+ TextGranularity granularity = CharacterGranularity;
+
+ if (extendSelection && newSelection.isCaretOrRange()) {
+ m_frame->selection()->setIsDirectional(false);
+
+ ASSERT(m_frame->settings());
+ if (m_frame->settings()->editingBehaviorType() == EditingMacBehavior) {
+ // See <rdar://problem/3668157> REGRESSION (Mail): shift-click deselects when selection
+ // was created right-to-left
+ Position start = newSelection.start();
+ Position end = newSelection.end();
+ int distanceToStart = textDistance(start, pos);
+ int distanceToEnd = textDistance(pos, end);
+ if (distanceToStart <= distanceToEnd)
+ newSelection = VisibleSelection(end, pos);
+ else
+ newSelection = VisibleSelection(start, pos);
+ } else {
+ newSelection.setExtent(pos);
+ }
+
+ if (m_frame->selectionGranularity() != CharacterGranularity) {
+ granularity = m_frame->selectionGranularity();
+ newSelection.expandUsingGranularity(m_frame->selectionGranularity());
+ }
+
+ m_beganSelectingText = true;
+ } else
+ newSelection = VisibleSelection(visiblePos);
+
+ if (m_frame->shouldChangeSelection(newSelection))
+ m_frame->selection()->setSelection(newSelection, granularity, MakeNonDirectionalSelection);
+
+ return true;
+}
+
+bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)
+{
+#if ENABLE(DRAG_SUPPORT)
+ // Reset drag state.
+ dragState().m_dragSrc = 0;
+#endif
+
+ cancelFakeMouseMoveEvent();
+
+ if (ScrollView* scrollView = m_frame->view()) {
+ if (scrollView->isPointInScrollbarCorner(event.event().pos()))
+ return false;
+ }
+
+ bool singleClick = event.event().clickCount() <= 1;
+
+ // If we got the event back, that must mean it wasn't prevented,
+ // so it's allowed to start a drag or selection.
+ m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode());
+
+#if ENABLE(DRAG_SUPPORT)
+ // Careful that the drag starting logic stays in sync with eventMayStartDrag()
+ m_mouseDownMayStartDrag = singleClick;
+#endif
+
+ m_mouseDownWasSingleClickInSelection = false;
+
+ m_mouseDown = event.event();
+
+ if (event.isOverWidget() && passWidgetMouseDownEventToWidget(event))
+ return true;
+
+#if ENABLE(SVG)
+ if (m_frame->document()->isSVGDocument()
+ && static_cast<SVGDocument*>(m_frame->document())->zoomAndPanEnabled()) {
+ if (event.event().shiftKey() && singleClick) {
+ m_svgPan = true;
+ static_cast<SVGDocument*>(m_frame->document())->startPan(event.event().pos());
+ return true;
+ }
+ }
+#endif
+
+ // We don't do this at the start of mouse down handling,
+ // because we don't want to do it until we know we didn't hit a widget.
+ if (singleClick)
+ focusDocumentView();
+
+ Node* innerNode = event.targetNode();
+
+ m_mousePressNode = innerNode;
+#if ENABLE(DRAG_SUPPORT)
+ m_dragStartPos = event.event().pos();
+#endif
+
+ bool swallowEvent = false;
+ m_mousePressed = true;
+ m_beganSelectingText = false;
+
+ if (event.event().clickCount() == 2)
+ swallowEvent = handleMousePressEventDoubleClick(event);
+ else if (event.event().clickCount() >= 3)
+ swallowEvent = handleMousePressEventTripleClick(event);
+ else
+ swallowEvent = handleMousePressEventSingleClick(event);
+
+ m_mouseDownMayStartAutoscroll = m_mouseDownMayStartSelect
+ || (m_mousePressNode && m_mousePressNode->renderBox() && m_mousePressNode->renderBox()->canBeProgramaticallyScrolled(true));
+
+ return swallowEvent;
+}
+
+// There are two kinds of renderer that can autoscroll.
+static bool canAutoscroll(RenderObject* renderer)
+{
+ if (!renderer->isBox())
+ return false;
+
+ // Check for a box that can be scrolled in its own right.
+ if (toRenderBox(renderer)->canBeScrolledAndHasScrollableArea())
+ return true;
+
+ // Check for a box that represents the top level of a web page.
+ // This can be scrolled by calling Chrome::scrollRectIntoView.
+ // This only has an effect on the Mac platform in applications
+ // that put web views into scrolling containers, such as Mac OS X Mail.
+ // The code for this is in RenderLayer::scrollRectToVisible.
+ if (renderer->node() != renderer->document())
+ return false;
+ Frame* frame = renderer->frame();
+ if (!frame)
+ return false;
+ Page* page = frame->page();
+ return page && page->mainFrame() == frame;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event)
+{
+ if (handleDrag(event))
+ return true;
+
+ if (!m_mousePressed)
+ return false;
+
+ Node* targetNode = event.targetNode();
+ if (event.event().button() != LeftButton || !targetNode || !targetNode->renderer())
+ return false;
+
+#if PLATFORM(MAC) // FIXME: Why does this assertion fire on other platforms?
+ ASSERT(m_mouseDownMayStartSelect || m_mouseDownMayStartAutoscroll);
+#endif
+
+ m_mouseDownMayStartDrag = false;
+
+ if (m_mouseDownMayStartAutoscroll && !m_panScrollInProgress) {
+ // Find a renderer that can autoscroll.
+ RenderObject* renderer = targetNode->renderer();
+ while (renderer && !canAutoscroll(renderer)) {
+ if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement())
+ renderer = renderer->document()->ownerElement()->renderer();
+ else
+ renderer = renderer->parent();
+ }
+
+ if (renderer) {
+ m_autoscrollInProgress = true;
+ handleAutoscroll(renderer);
+ }
+
+ m_mouseDownMayStartAutoscroll = false;
+ }
+
+ updateSelectionForMouseDrag(targetNode, event.localPoint());
+ return true;
+}
+
+bool EventHandler::eventMayStartDrag(const PlatformMouseEvent& event) const
+{
+ // This is a pre-flight check of whether the event might lead to a drag being started. Be careful
+ // that its logic needs to stay in sync with handleMouseMoveEvent() and the way we setMouseDownMayStartDrag
+ // in handleMousePressEvent
+
+ if (!m_frame->contentRenderer() || !m_frame->contentRenderer()->hasLayer())
+ return false;
+
+ if (event.button() != LeftButton || event.clickCount() != 1)
+ return false;
+
+ bool DHTMLFlag;
+ bool UAFlag;
+ allowDHTMLDrag(DHTMLFlag, UAFlag);
+ if (!DHTMLFlag && !UAFlag)
+ return false;
+
+ FrameView* view = m_frame->view();
+ if (!view)
+ return false;
+
+ HitTestRequest request(HitTestRequest::ReadOnly);
+ HitTestResult result(view->windowToContents(event.pos()));
+ m_frame->contentRenderer()->layer()->hitTest(request, result);
+ bool srcIsDHTML;
+ return result.innerNode() && result.innerNode()->renderer()->draggableNode(DHTMLFlag, UAFlag, result.point().x(), result.point().y(), srcIsDHTML);
+}
+
+void EventHandler::updateSelectionForMouseDrag()
+{
+ FrameView* view = m_frame->view();
+ if (!view)
+ return;
+ RenderView* renderer = m_frame->contentRenderer();
+ if (!renderer)
+ return;
+ RenderLayer* layer = renderer->layer();
+ if (!layer)
+ return;
+
+ HitTestRequest request(HitTestRequest::ReadOnly |
+ HitTestRequest::Active |
+ HitTestRequest::MouseMove);
+ HitTestResult result(view->windowToContents(m_currentMousePosition));
+ layer->hitTest(request, result);
+ updateSelectionForMouseDrag(result.innerNode(), result.localPoint());
+}
+
+void EventHandler::updateSelectionForMouseDrag(Node* targetNode, const IntPoint& localPoint)
+{
+ if (!m_mouseDownMayStartSelect)
+ return;
+
+ if (!targetNode)
+ return;
+
+ 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.
+ VisibleSelection newSelection = m_frame->selection()->selection();
+
+#if ENABLE(SVG)
+ // Special case to limit selection to the containing block for SVG text.
+ // FIXME: Isn't there a better non-SVG-specific way to do this?
+ if (Node* selectionBaseNode = newSelection.base().node())
+ if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer())
+ if (selectionBaseRenderer->isSVGText())
+ if (targetNode->renderer()->containingBlock() != selectionBaseRenderer->containingBlock())
+ return;
+#endif
+
+ if (!m_beganSelectingText) {
+ m_beganSelectingText = true;
+ newSelection = VisibleSelection(targetPosition);
+ }
+
+ newSelection.setExtent(targetPosition);
+ if (m_frame->selectionGranularity() != CharacterGranularity)
+ newSelection.expandUsingGranularity(m_frame->selectionGranularity());
+
+ if (m_frame->shouldChangeSelection(newSelection)) {
+ m_frame->selection()->setIsDirectional(false);
+ m_frame->selection()->setSelection(newSelection, m_frame->selectionGranularity(), MakeNonDirectionalSelection);
+ }
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+void EventHandler::lostMouseCapture()
+{
+ m_frame->selection()->setCaretBlinkingSuspended(false);
+}
+
+bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event)
+{
+ if (eventLoopHandleMouseUp(event))
+ return true;
+
+ // If this was the first click in the window, we don't even want to clear the selection.
+ // This case occurs when the user clicks on a draggable element, since we have to process
+ // the mouse down and drag events to see if we might start a drag. For other first clicks
+ // in a window, we just don't acceptFirstMouse, and the whole down-drag-up sequence gets
+ // ignored upstream of this layer.
+ return eventActivatedView(event.event());
+}
+
+bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event)
+{
+ if (m_autoscrollInProgress)
+ stopAutoscrollTimer();
+
+ if (handleMouseUp(event))
+ return true;
+
+ // Used to prevent mouseMoveEvent from initiating a drag before
+ // the mouse is pressed again.
+ m_frame->selection()->setCaretBlinkingSuspended(false);
+ m_mousePressed = false;
+ m_capturesDragging = false;
+#if ENABLE(DRAG_SUPPORT)
+ m_mouseDownMayStartDrag = false;
+#endif
+ m_mouseDownMayStartSelect = false;
+ m_mouseDownMayStartAutoscroll = false;
+ m_mouseDownWasInSubframe = false;
+
+ bool handled = false;
+
+ // Clear the selection if the mouse didn't move after the last mouse
+ // press and it's not a context menu click. We do this so when clicking
+ // on the selection, the selection goes away. However, if we are
+ // editing, place the caret.
+ if (m_mouseDownWasSingleClickInSelection && !m_beganSelectingText
+#if ENABLE(DRAG_SUPPORT)
+ && m_dragStartPos == event.event().pos()
+#endif
+ && m_frame->selection()->isRange()
+ && event.event().button() != RightButton) {
+ VisibleSelection newSelection;
+ Node* node = event.targetNode();
+ bool caretBrowsing = m_frame->settings()->caretBrowsingEnabled();
+ if (node && (caretBrowsing || node->isContentEditable()) && node->renderer()) {
+ VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint());
+ newSelection = VisibleSelection(pos);
+ }
+ if (m_frame->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();
+ if (FrameView* view = m_frame->view())
+ view->addPanScrollIcon(m_panScrollStartPos);
+ // If we're not in the top frame we notify it that we doing a panScroll.
+ if (Page* page = m_frame->page()) {
+ Frame* mainFrame = page->mainFrame();
+ if (m_frame != mainFrame)
+ mainFrame->eventHandler()->setPanScrollInProgress(true);
+ }
+ }
+#endif
+
+ startAutoscrollTimer();
+}
+
+void EventHandler::autoscrollTimerFired(Timer<EventHandler>*)
+{
+ RenderObject* r = autoscrollRenderer();
+ if (!r || !r->isBox()) {
+ stopAutoscrollTimer();
+ return;
+ }
+
+ if (m_autoscrollInProgress) {
+ if (!m_mousePressed) {
+ stopAutoscrollTimer();
+ return;
+ }
+ toRenderBox(r)->autoscroll();
+ } else {
+ // we verify that the main frame hasn't received the order to stop the panScroll
+ if (Page* page = m_frame->page()) {
+ if (!page->mainFrame()->eventHandler()->panScrollInProgress()) {
+ stopAutoscrollTimer();
+ return;
+ }
+ }
+#if ENABLE(PAN_SCROLLING)
+ updatePanScrollState();
+ toRenderBox(r)->panScroll(m_panScrollStartPos);
+#endif
+ }
+}
+
+#if ENABLE(PAN_SCROLLING)
+
+void EventHandler::startPanScrolling(RenderObject* renderer)
+{
+ m_panScrollInProgress = true;
+ m_panScrollButtonPressed = true;
+ handleAutoscroll(renderer);
+ invalidateClick();
+}
+
+void EventHandler::updatePanScrollState()
+{
+ FrameView* view = m_frame->view();
+ if (!view)
+ return;
+
+ // At the original click location we draw a 4 arrowed icon. Over this icon there won't be any scroll
+ // So we don't want to change the cursor over this area
+ bool east = m_panScrollStartPos.x() < (m_currentMousePosition.x() - ScrollView::noPanScrollRadius);
+ bool west = m_panScrollStartPos.x() > (m_currentMousePosition.x() + ScrollView::noPanScrollRadius);
+ bool north = m_panScrollStartPos.y() > (m_currentMousePosition.y() + ScrollView::noPanScrollRadius);
+ bool south = m_panScrollStartPos.y() < (m_currentMousePosition.y() - ScrollView::noPanScrollRadius);
+
+ if ((east || west || north || south) && m_panScrollButtonPressed)
+ m_springLoadedPanScrollInProgress = true;
+
+ if (north) {
+ if (east)
+ view->setCursor(northEastPanningCursor());
+ else if (west)
+ view->setCursor(northWestPanningCursor());
+ else
+ view->setCursor(northPanningCursor());
+ } else if (south) {
+ if (east)
+ view->setCursor(southEastPanningCursor());
+ else if (west)
+ view->setCursor(southWestPanningCursor());
+ else
+ view->setCursor(southPanningCursor());
+ } else if (east)
+ view->setCursor(eastPanningCursor());
+ else if (west)
+ view->setCursor(westPanningCursor());
+ else
+ view->setCursor(middlePanningCursor());
+}
+
+#endif // ENABLE(PAN_SCROLLING)
+
+RenderObject* EventHandler::autoscrollRenderer() const
+{
+ return m_autoscrollRenderer;
+}
+
+void EventHandler::updateAutoscrollRenderer()
+{
+ if (!m_autoscrollRenderer)
+ return;
+
+ HitTestResult hitTest = hitTestResultAtPoint(m_panScrollStartPos, true);
+
+ if (Node* nodeAtPoint = hitTest.innerNode())
+ m_autoscrollRenderer = nodeAtPoint->renderer();
+
+ while (m_autoscrollRenderer && !canAutoscroll(m_autoscrollRenderer))
+ m_autoscrollRenderer = m_autoscrollRenderer->parent();
+}
+
+void EventHandler::setAutoscrollRenderer(RenderObject* renderer)
+{
+ m_autoscrollRenderer = renderer;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const
+{
+ flagDHTML = false;
+ flagUA = false;
+
+ if (!m_frame)
+ return;
+
+ Page* page = m_frame->page();
+ if (!page)
+ return;
+
+ FrameView* view = m_frame->view();
+ if (!view)
+ return;
+
+ unsigned mask = page->dragController()->delegateDragSourceAction(view->contentsToWindow(m_mouseDownPos));
+ flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone;
+ flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection));
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent, bool ignoreClipping, HitTestScrollbars testScrollbars, HitTestRequest::HitTestRequestType hitType, const IntSize& padding)
+{
+ HitTestResult result(point, padding);
+ if (!m_frame->contentRenderer())
+ return result;
+ if (ignoreClipping)
+ hitType |= HitTestRequest::IgnoreClipping;
+ m_frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), result);
+
+ while (true) {
+ Node* n = result.innerNode();
+ if (!result.isOverWidget() || !n || !n->renderer() || !n->renderer()->isWidget())
+ break;
+ RenderWidget* renderWidget = toRenderWidget(n->renderer());
+ Widget* widget = renderWidget->widget();
+ if (!widget || !widget->isFrameView())
+ break;
+ Frame* frame = static_cast<HTMLFrameElementBase*>(n)->contentFrame();
+ if (!frame || !frame->contentRenderer())
+ break;
+ FrameView* view = static_cast<FrameView*>(widget);
+ IntPoint widgetPoint(result.localPoint().x() + view->scrollX() - renderWidget->borderLeft() - renderWidget->paddingLeft(),
+ result.localPoint().y() + view->scrollY() - renderWidget->borderTop() - renderWidget->paddingTop());
+ HitTestResult widgetHitTestResult(widgetPoint, padding);
+ frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), widgetHitTestResult);
+ result = widgetHitTestResult;
+
+ if (testScrollbars == ShouldHitTestScrollbars) {
+ Scrollbar* eventScrollbar = view->scrollbarAtPoint(point);
+ if (eventScrollbar)
+ result.setScrollbar(eventScrollbar);
+ }
+ }
+
+ // If our HitTestResult is not visible, then we started hit testing too far down the frame chain.
+ // Another hit test at the main frame level should get us the correct visible result.
+ Frame* resultFrame = result.innerNonSharedNode() ? result.innerNonSharedNode()->document()->frame() : 0;
+ if (Page* page = m_frame->page()) {
+ Frame* mainFrame = page->mainFrame();
+ if (m_frame != mainFrame && resultFrame && resultFrame != mainFrame && !resultFrame->editor()->insideVisibleArea(result.point())) {
+ FrameView* resultView = resultFrame->view();
+ FrameView* mainView = mainFrame->view();
+ if (resultView && mainView) {
+ IntPoint windowPoint = resultView->contentsToWindow(result.point());
+ IntPoint mainFramePoint = mainView->windowToContents(windowPoint);
+ result = mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping, testScrollbars, hitType, padding);
+ }
+ }
+ }
+
+ if (!allowShadowContent)
+ result.setToNonShadowAncestor();
+
+ return result;
+}
+
+
+void EventHandler::startAutoscrollTimer()
+{
+ m_autoscrollTimer.startRepeating(autoscrollInterval);
+}
+
+void EventHandler::stopAutoscrollTimer(bool rendererIsBeingDestroyed)
+{
+ if (m_autoscrollInProgress) {
+ if (m_mouseDownWasInSubframe) {
+ if (Frame* subframe = subframeForTargetNode(m_mousePressNode.get()))
+ subframe->eventHandler()->stopAutoscrollTimer(rendererIsBeingDestroyed);
+ return;
+ }
+ }
+
+ if (autoscrollRenderer()) {
+ if (!rendererIsBeingDestroyed && (m_autoscrollInProgress || m_panScrollInProgress))
+ toRenderBox(autoscrollRenderer())->stopAutoscroll();
+#if ENABLE(PAN_SCROLLING)
+ if (m_panScrollInProgress) {
+ if (FrameView* view = m_frame->view()) {
+ view->removePanScrollIcon();
+ view->setCursor(pointerCursor());
+ }
+ }
+#endif
+
+ setAutoscrollRenderer(0);
+ }
+
+ m_autoscrollTimer.stop();
+
+ m_panScrollInProgress = false;
+ m_springLoadedPanScrollInProgress = false;
+
+ // If we're not in the top frame we notify it that we are not doing a panScroll any more.
+ if (Page* page = m_frame->page()) {
+ Frame* mainFrame = page->mainFrame();
+ if (m_frame != mainFrame)
+ mainFrame->eventHandler()->setPanScrollInProgress(false);
+ }
+
+ m_autoscrollInProgress = false;
+}
+
+Node* EventHandler::mousePressNode() const
+{
+ return m_mousePressNode.get();
+}
+
+void EventHandler::setMousePressNode(PassRefPtr<Node> node)
+{
+ m_mousePressNode = node;
+}
+
+bool EventHandler::scrollOverflow(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode)
+{
+ Node* node = startingNode;
+
+ if (!node)
+ node = m_frame->document()->focusedNode();
+
+ if (!node)
+ node = m_mousePressNode.get();
+
+ if (node) {
+ RenderObject* r = node->renderer();
+ if (r && !r->isListBox() && r->enclosingBox()->scroll(direction, granularity)) {
+ setFrameWasScrolledByUser();
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool EventHandler::scrollRecursively(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode)
+{
+ // The layout needs to be up to date to determine if we can scroll. We may be
+ // here because of an onLoad event, in which case the final layout hasn't been performed yet.
+ m_frame->document()->updateLayoutIgnorePendingStylesheets();
+ bool handled = scrollOverflow(direction, granularity, startingNode);
+ if (!handled) {
+ Frame* frame = m_frame;
+ do {
+ FrameView* view = frame->view();
+ handled = view ? view->scroll(direction, granularity) : false;
+ frame = frame->tree()->parent();
+ } while (!handled && frame);
+ }
+
+ return handled;
+}
+
+IntPoint EventHandler::currentMousePosition() const
+{
+ return m_currentMousePosition;
+}
+
+Frame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)
+{
+ if (!hitTestResult.isOverWidget())
+ return 0;
+ return EventHandler::subframeForTargetNode(hitTestResult.targetNode());
+}
+
+Frame* EventHandler::subframeForTargetNode(Node* node)
+{
+ if (!node)
+ return 0;
+
+ RenderObject* renderer = node->renderer();
+ if (!renderer || !renderer->isWidget())
+ return 0;
+
+ Widget* widget = toRenderWidget(renderer)->widget();
+ if (!widget || !widget->isFrameView())
+ return 0;
+
+ return static_cast<FrameView*>(widget)->frame();
+}
+
+static bool isSubmitImage(Node* node)
+{
+ return node && node->hasTagName(inputTag)
+ && static_cast<HTMLInputElement*>(node)->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* frameSetRenderer = toRenderFrameSet(renderer);
+ if (frameSetRenderer->canResizeRow(event.localPoint()))
+ return rowResizeCursor();
+ if (frameSetRenderer->canResizeColumn(event.localPoint()))
+ return columnResizeCursor();
+ }
+
+ if (style && style->cursors()) {
+ const CursorList* cursors = style->cursors();
+ for (unsigned i = 0; i < cursors->size(); ++i) {
+ const CachedImage* cimage = (*cursors)[i].image();
+ 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;
+ if (cimage->image()->isNull())
+ break;
+ if (!cimage->errorOccurred())
+ return Cursor(cimage->image(), hotSpot);
+ }
+ }
+
+ switch (style ? style->cursor() : CURSOR_AUTO) {
+ case CURSOR_AUTO: {
+ bool editable = (node && node->isContentEditable());
+ bool editableLinkEnabled = false;
+
+ // If the link is editable, then we need to check the settings to see whether or not the link should be followed
+ if (editable) {
+ ASSERT(m_frame->settings());
+ switch (m_frame->settings()->editableLinkBehavior()) {
+ default:
+ case EditableLinkDefaultBehavior:
+ case EditableLinkAlwaysLive:
+ editableLinkEnabled = true;
+ break;
+
+ case EditableLinkNeverLive:
+ editableLinkEnabled = false;
+ break;
+
+ case EditableLinkLiveWhenNotFocused:
+ editableLinkEnabled = nodeIsNotBeingEdited(node, m_frame) || event.event().shiftKey();
+ break;
+
+ case EditableLinkOnlyLiveWithShiftKey:
+ editableLinkEnabled = event.event().shiftKey();
+ break;
+ }
+ }
+
+ if ((event.isOverLink() || isSubmitImage(node)) && (!editable || editableLinkEnabled))
+ return handCursor();
+ bool inResizer = false;
+ if (renderer) {
+ if (RenderLayer* layer = renderer->enclosingLayer()) {
+ if (FrameView* view = m_frame->view())
+ inResizer = layer->isPointInResizeControl(view->windowToContents(event.event().pos()));
+ }
+ }
+ if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar)
+ return 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();
+}
+
+static IntPoint documentPointForWindowPoint(Frame* frame, const IntPoint& windowPoint)
+{
+ FrameView* view = frame->view();
+ // FIXME: Is it really OK to use the wrong coordinates here when view is 0?
+ // Historically the code would just crash; this is clearly no worse than that.
+ return view ? view->windowToContents(windowPoint) : windowPoint;
+}
+
+bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)
+{
+ RefPtr<FrameView> protector(m_frame->view());
+
+ UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+ cancelFakeMouseMoveEvent();
+ m_mousePressed = true;
+ m_capturesDragging = true;
+ m_currentMousePosition = mouseEvent.pos();
+ m_mouseDownTimestamp = mouseEvent.timestamp();
+#if ENABLE(DRAG_SUPPORT)
+ m_mouseDownMayStartDrag = false;
+#endif
+ m_mouseDownMayStartSelect = false;
+ m_mouseDownMayStartAutoscroll = false;
+ if (FrameView* view = m_frame->view())
+ m_mouseDownPos = view->windowToContents(mouseEvent.pos());
+ else {
+ invalidateClick();
+ return false;
+ }
+ m_mouseDownWasInSubframe = false;
+
+ HitTestRequest request(HitTestRequest::Active);
+ // Save the document point we generate in case the window coordinate is invalidated by what happens
+ // when we dispatch the event.
+ IntPoint documentPoint = documentPointForWindowPoint(m_frame, mouseEvent.pos());
+ MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
+
+ if (!mev.targetNode()) {
+ invalidateClick();
+ return false;
+ }
+
+ m_mousePressNode = mev.targetNode();
+
+#if ENABLE(INSPECTOR)
+ if (Page* page = m_frame->page()) {
+ InspectorController* inspector = page->inspectorController();
+ if (inspector && inspector->enabled() && inspector->searchingForNodeInPage()) {
+ inspector->handleMousePress();
+ invalidateClick();
+ return true;
+ }
+ }
+#endif
+
+ Frame* subframe = subframeForHitTestResult(mev);
+ if (subframe && passMousePressEventToSubframe(mev, subframe)) {
+ // Start capturing future events for this frame. We only do this if we didn't clear
+ // the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop.
+ m_capturesDragging = subframe->eventHandler()->capturesDragging();
+ if (m_mousePressed && m_capturesDragging) {
+ m_capturingMouseEventsNode = mev.targetNode();
+ m_eventHandlerWillResetCapturingMouseEventsNode = true;
+ }
+ invalidateClick();
+ return true;
+ }
+
+#if ENABLE(PAN_SCROLLING)
+ Page* page = m_frame->page();
+ if ((page && page->mainFrame()->eventHandler()->panScrollInProgress()) || m_autoscrollInProgress) {
+ stopAutoscrollTimer();
+ invalidateClick();
+ return true;
+ }
+#endif
+
+ m_clickCount = mouseEvent.clickCount();
+ m_clickNode = mev.targetNode();
+
+ if (FrameView* view = m_frame->view()) {
+ RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0;
+ IntPoint p = view->windowToContents(mouseEvent.pos());
+ if (layer && layer->isPointInResizeControl(p)) {
+ layer->setInResizeMode(true);
+ m_resizeLayer = layer;
+ m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p);
+ invalidateClick();
+ return true;
+ }
+ }
+
+ m_frame->selection()->setCaretBlinkingSuspended(true);
+
+ bool swallowEvent = dispatchMouseEvent(eventNames().mousedownEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
+ m_capturesDragging = !swallowEvent;
+
+ // If the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults
+ // in case the scrollbar widget was destroyed when the mouse event was handled.
+ if (mev.scrollbar()) {
+ const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get();
+ HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
+ mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
+ if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())
+ m_lastScrollbarUnderMouse = 0;
+ }
+
+ if (swallowEvent) {
+ // scrollbars should get events anyway, even disabled controls might be scrollable
+ Scrollbar* scrollbar = mev.scrollbar();
+
+ updateLastScrollbarUnderMouse(scrollbar, true);
+
+ if (scrollbar)
+ passMousePressEventToScrollbar(mev, scrollbar);
+ } else {
+ // Refetch the event target node if it currently is the shadow node inside an <input> element.
+ // If a mouse event handler changes the input element type to one that has a widget associated,
+ // we'd like to EventHandler::handleMousePressEvent to pass the event to the widget and thus the
+ // event target node can't still be the shadow node.
+ if (mev.targetNode()->isShadowNode() && mev.targetNode()->shadowParentNode()->hasTagName(inputTag)) {
+ HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
+ mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
+ }
+
+ FrameView* view = m_frame->view();
+ Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mouseEvent.pos()) : 0;
+ if (!scrollbar)
+ scrollbar = mev.scrollbar();
+
+ updateLastScrollbarUnderMouse(scrollbar, true);
+
+ if (scrollbar && passMousePressEventToScrollbar(mev, scrollbar))
+ swallowEvent = true;
+ else
+ swallowEvent = handleMousePressEvent(mev);
+ }
+
+ return swallowEvent;
+}
+
+// This method only exists for platforms that don't know how to deliver
+bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent)
+{
+ RefPtr<FrameView> protector(m_frame->view());
+
+ UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+ // We get this instead of a second mouse-up
+ m_mousePressed = false;
+ m_currentMousePosition = mouseEvent.pos();
+
+ HitTestRequest request(HitTestRequest::Active);
+ MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
+ Frame* subframe = subframeForHitTestResult(mev);
+ if (m_eventHandlerWillResetCapturingMouseEventsNode)
+ m_capturingMouseEventsNode = 0;
+ if (subframe && passMousePressEventToSubframe(mev, subframe))
+ return true;
+
+ m_clickCount = mouseEvent.clickCount();
+ bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
+
+ bool swallowClickEvent = 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)
+ return false;
+
+ RefPtr<FrameView> protector(m_frame->view());
+ m_currentMousePosition = mouseEvent.pos();
+
+ if (m_hoverTimer.isActive())
+ m_hoverTimer.stop();
+
+ cancelFakeMouseMoveEvent();
+
+#if ENABLE(SVG)
+ if (m_svgPan) {
+ static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition);
+ return true;
+ }
+#endif
+
+ if (m_frameSetBeingResized)
+ return dispatchMouseEvent(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false);
+
+ // Send events right to a scrollbar if the mouse is pressed.
+ if (m_lastScrollbarUnderMouse && m_mousePressed)
+ return m_lastScrollbarUnderMouse->mouseMoved(mouseEvent);
+
+ // Treat mouse move events while the mouse is pressed as "read-only" in prepareMouseEvent
+ // if we are allowed to select.
+ // This means that :hover and :active freeze in the state they were in when the mouse
+ // was pressed, rather than updating for nodes the mouse moves over as you hold the mouse down.
+ HitTestRequest::HitTestRequestType hitType = HitTestRequest::MouseMove;
+ if (m_mousePressed && m_mouseDownMayStartSelect)
+ hitType |= HitTestRequest::ReadOnly;
+ if (m_mousePressed)
+ hitType |= HitTestRequest::Active;
+
+#if ENABLE(TOUCH_EVENTS)
+ // Treat any mouse move events as readonly if the user is currently touching the screen.
+ if (m_touchPressed)
+ hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly;
+#endif
+ HitTestRequest request(hitType);
+ MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
+ if (hoveredNode)
+ *hoveredNode = mev.hitTestResult();
+
+ Scrollbar* scrollbar = 0;
+
+ if (m_resizeLayer && m_resizeLayer->inResizeMode())
+ m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner);
+ else {
+ if (FrameView* view = m_frame->view())
+ scrollbar = view->scrollbarAtPoint(mouseEvent.pos());
+
+ if (!scrollbar)
+ scrollbar = mev.scrollbar();
+
+ updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed);
+ }
+
+ bool swallowEvent = false;
+ RefPtr<Frame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
+
+ // We want mouseouts to happen first, from the inside out. First send a move event to the last subframe so that it will fire mouseouts.
+ if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)
+ passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get());
+
+ if (newSubframe) {
+ // Update over/out state before passing the event to the subframe.
+ updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true);
+
+ // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target
+ // node to be detached from its FrameView, in which case the event should not be passed.
+ if (newSubframe->view())
+ swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);
+ } else {
+ if (scrollbar && !m_mousePressed)
+ scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering.
+ if (Page* page = m_frame->page()) {
+ if ((!m_resizeLayer || !m_resizeLayer->inResizeMode()) && !page->mainFrame()->eventHandler()->panScrollInProgress()) {
+ // Plugins set cursor on their own. The only case WebKit intervenes is resetting cursor to arrow on mouse enter,
+ // in case the particular plugin doesn't manipulate cursor at all. Thus, even a CSS cursor set on body has no
+ // effect on plugins (which matches Firefox).
+ bool overPluginElement = false;
+ if (mev.targetNode() && mev.targetNode()->isHTMLElement()) {
+ HTMLElement* el = static_cast<HTMLElement*>(mev.targetNode());
+ overPluginElement = el->hasTagName(appletTag) || el->hasTagName(objectTag) || el->hasTagName(embedTag);
+ }
+ if (!overPluginElement) {
+ if (FrameView* view = m_frame->view())
+ view->setCursor(selectCursor(mev, scrollbar));
+ }
+ }
+ }
+ }
+
+ m_lastMouseMoveEventSubframe = newSubframe;
+
+ if (swallowEvent)
+ return true;
+
+ swallowEvent = dispatchMouseEvent(eventNames().mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true);
+#if ENABLE(DRAG_SUPPORT)
+ if (!swallowEvent)
+ swallowEvent = handleMouseDraggedEvent(mev);
+#endif // ENABLE(DRAG_SUPPORT)
+
+ return swallowEvent;
+}
+
+void EventHandler::invalidateClick()
+{
+ m_clickCount = 0;
+ m_clickNode = 0;
+}
+
+bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)
+{
+ RefPtr<FrameView> protector(m_frame->view());
+
+ UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+#if ENABLE(PAN_SCROLLING)
+ if (mouseEvent.button() == MiddleButton)
+ m_panScrollButtonPressed = false;
+ if (m_springLoadedPanScrollInProgress)
+ stopAutoscrollTimer();
+#endif
+
+ m_mousePressed = false;
+ m_currentMousePosition = mouseEvent.pos();
+
+#if ENABLE(SVG)
+ if (m_svgPan) {
+ m_svgPan = false;
+ static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition);
+ return true;
+ }
+#endif
+
+ if (m_frameSetBeingResized)
+ return dispatchMouseEvent(eventNames().mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false);
+
+ if (m_lastScrollbarUnderMouse) {
+ invalidateClick();
+ return m_lastScrollbarUnderMouse->mouseUp();
+ }
+
+ HitTestRequest request(HitTestRequest::MouseUp);
+ MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
+ Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
+ if (m_eventHandlerWillResetCapturingMouseEventsNode)
+ m_capturingMouseEventsNode = 0;
+ if (subframe && passMouseReleaseEventToSubframe(mev, subframe))
+ return true;
+
+ bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
+
+ // 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;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+ FrameView* view = m_frame->view();
+
+ // FIXME: We might want to dispatch a dragleave even if the view is gone.
+ if (!view)
+ return false;
+
+ view->resetDeferredRepaintDelay();
+ IntPoint contentsPos = view->windowToContents(event.pos());
+
+ RefPtr<MouseEvent> me = MouseEvent::create(eventType,
+ true, true, m_frame->document()->defaultView(),
+ 0, event.globalX(), event.globalY(), contentsPos.x(), contentsPos.y(),
+ event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
+ 0, 0, clipboard);
+
+ ExceptionCode ec;
+ dragTarget->dispatchEvent(me.get(), ec);
+ return me->defaultPrevented();
+}
+
+bool EventHandler::canHandleDragAndDropForTarget(DragAndDropHandleType type, Node* target, const PlatformMouseEvent& event, Clipboard* clipboard, bool* accepted)
+{
+ bool canHandle = false;
+ bool wasAccepted = false;
+
+ if (target->hasTagName(frameTag) || target->hasTagName(iframeTag)) {
+ Frame* frame = static_cast<HTMLFrameElementBase*>(target)->contentFrame();
+ if (frame) {
+ switch (type) {
+ case UpdateDragAndDrop:
+ wasAccepted = frame->eventHandler()->updateDragAndDrop(event, clipboard);
+ break;
+ case CancelDragAndDrop:
+ frame->eventHandler()->cancelDragAndDrop(event, clipboard);
+ break;
+ case PerformDragAndDrop:
+ wasAccepted = frame->eventHandler()->performDragAndDrop(event, clipboard);
+ break;
+ }
+ }
+ } else
+ canHandle = true;
+
+ if (accepted)
+ *accepted = wasAccepted;
+
+ return canHandle;
+}
+
+bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+ bool accept = false;
+
+ if (!m_frame->view())
+ return false;
+
+ HitTestRequest request(HitTestRequest::ReadOnly);
+ MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);
+
+ // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch)
+ Node* newTarget = mev.targetNode();
+ if (newTarget && newTarget->isTextNode())
+ newTarget = newTarget->parentNode();
+ if (newTarget)
+ newTarget = newTarget->shadowAncestorNode();
+
+ if (m_dragTarget != newTarget) {
+ // FIXME: this ordering was explicitly chosen to match WinIE. However,
+ // it is sometimes incorrect when dragging within subframes, as seen with
+ // LayoutTests/fast/events/drag-in-frames.html.
+ //
+ // Moreover, this ordering conforms to section 7.9.4 of the HTML 5 spec. <http://dev.w3.org/html5/spec/Overview.html#drag-and-drop-processing-model>.
+ if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) {
+ // As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event.
+ if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
+ // for now we don't care if event handler cancels default behavior, since there is none
+ dispatchDragSrcEvent(eventNames().dragEvent, event);
+ }
+ accept = dispatchDragEvent(eventNames().dragenterEvent, newTarget, event, clipboard);
+ }
+
+ if (m_dragTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, m_dragTarget.get(), event, clipboard, &accept))
+ dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
+
+ if (newTarget) {
+ // We do not explicitly call dispatchDragEvent here because it could ultimately result in the appearance that
+ // two dragover events fired. So, we mark that we should only fire a dragover event on the next call to this function.
+ m_shouldOnlyFireDragOverEvent = true;
+ }
+ } else {
+ if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) {
+ // Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier.
+ if (!m_shouldOnlyFireDragOverEvent && dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
+ // for now we don't care if event handler cancels default behavior, since there is none
+ dispatchDragSrcEvent(eventNames().dragEvent, event);
+ }
+ accept = dispatchDragEvent(eventNames().dragoverEvent, newTarget, event, clipboard);
+ m_shouldOnlyFireDragOverEvent = false;
+ }
+ }
+ m_dragTarget = newTarget;
+
+ return accept;
+}
+
+void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+ if (m_dragTarget && canHandleDragAndDropForTarget(CancelDragAndDrop, m_dragTarget.get(), event, clipboard)) {
+ if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML)
+ dispatchDragSrcEvent(eventNames().dragEvent, event);
+ dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
+ }
+ clearDragState();
+}
+
+bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
+{
+ bool accept = false;
+ if (m_dragTarget && canHandleDragAndDropForTarget(PerformDragAndDrop, m_dragTarget.get(), event, clipboard, &accept))
+ dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard);
+ clearDragState();
+ return accept;
+}
+
+void EventHandler::clearDragState()
+{
+ m_dragTarget = 0;
+ m_capturingMouseEventsNode = 0;
+ m_shouldOnlyFireDragOverEvent = false;
+#if PLATFORM(MAC)
+ m_sendingEventToSubview = false;
+#endif
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+void EventHandler::setCapturingMouseEventsNode(PassRefPtr<Node> n)
+{
+ m_capturingMouseEventsNode = n;
+ m_eventHandlerWillResetCapturingMouseEventsNode = false;
+}
+
+MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev)
+{
+ ASSERT(m_frame);
+ ASSERT(m_frame->document());
+
+ return m_frame->document()->prepareMouseEvent(request, documentPointForWindowPoint(m_frame, mev.pos()), mev);
+}
+
+#if ENABLE(SVG)
+static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)
+{
+ if (!referenceNode || !referenceNode->isSVGElement())
+ return 0;
+
+ Node* shadowTreeElement = referenceNode->shadowTreeRootNode();
+ if (!shadowTreeElement)
+ return 0;
+
+ 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)
+{
+ if (FrameView* view = m_frame->view())
+ view->resetDeferredRepaintDelay();
+
+ updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);
+
+ bool swallowEvent = false;
+
+ if (m_nodeUnderMouse)
+ swallowEvent = m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount);
+
+ if (!swallowEvent && eventType == eventNames().mousedownEvent) {
+
+ // If clicking on a frame scrollbar, do not mess up with content focus.
+ if (FrameView* view = m_frame->view()) {
+ if (view->scrollbarAtPoint(mouseEvent.pos()))
+ return false;
+ }
+
+ // The layout needs to be up to date to determine if an element is focusable.
+ m_frame->document()->updateLayoutIgnorePendingStylesheets();
+
+ // Blur current focus node when a link/button is clicked; this
+ // is expected by some sites that rely on onChange handlers running
+ // from form fields before the button click is processed.
+ Node* node = m_nodeUnderMouse.get();
+ 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->node();
+ 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()->toNormalizedRange()->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 (Page* page = m_frame->page()) {
+ if (node && node->isMouseFocusable()) {
+ if (!page->focusController()->setFocusedNode(node, m_frame))
+ swallowEvent = true;
+ } else if (!node || !node->focused()) {
+ if (!page->focusController()->setFocusedNode(0, m_frame))
+ swallowEvent = true;
+ }
+ }
+ }
+
+ return swallowEvent;
+}
+
+#if !PLATFORM(GTK) && !(PLATFORM(CHROMIUM) && OS(LINUX))
+bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult&) const
+{
+ return false;
+}
+#endif
+
+bool EventHandler::handleWheelEvent(PlatformWheelEvent& e)
+{
+ Document* doc = m_frame->document();
+
+ RenderObject* docRenderer = doc->renderer();
+ if (!docRenderer)
+ return false;
+
+ RefPtr<FrameView> protector(m_frame->view());
+
+ FrameView* view = m_frame->view();
+ if (!view)
+ return false;
+ setFrameWasScrolledByUser();
+ IntPoint vPoint = view->windowToContents(e.pos());
+
+ Node* node;
+ bool isOverWidget;
+
+ HitTestRequest request(HitTestRequest::ReadOnly);
+ HitTestResult result(vPoint);
+ doc->renderView()->layer()->hitTest(request, result);
+
+ if (m_useLatchedWheelEventNode) {
+ if (!m_latchedWheelEventNode) {
+ m_latchedWheelEventNode = result.innerNode();
+ m_widgetIsLatched = result.isOverWidget();
+ }
+
+ node = m_latchedWheelEventNode.get();
+ isOverWidget = m_widgetIsLatched;
+ } else {
+ if (m_latchedWheelEventNode)
+ m_latchedWheelEventNode = 0;
+ if (m_previousWheelScrolledNode)
+ m_previousWheelScrolledNode = 0;
+
+ node = result.innerNode();
+ isOverWidget = result.isOverWidget();
+ }
+
+ if (shouldTurnVerticalTicksIntoHorizontal(result))
+ e.turnVerticalTicksIntoHorizontal();
+
+ if (node) {
+ // Figure out which view to send the event to.
+ RenderObject* target = node->renderer();
+
+ if (isOverWidget && target && target->isWidget()) {
+ Widget* widget = toRenderWidget(target)->widget();
+ if (widget && passWheelEventToWidget(e, widget)) {
+ e.accept();
+ return true;
+ }
+ }
+
+ node = node->shadowAncestorNode();
+ node->dispatchWheelEvent(e);
+ if (e.isAccepted())
+ return true;
+ }
+
+ if (e.isAccepted())
+ return true;
+
+ view = m_frame->view();
+ if (!view)
+ return false;
+
+ view->wheelEvent(e);
+ return e.isAccepted();
+}
+
+void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent)
+{
+ if (!startNode || !wheelEvent)
+ return;
+
+ Node* stopNode = m_previousWheelScrolledNode.get();
+
+ // Break up into two scrolls if we need to. Diagonal movement on
+ // a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set).
+ if (scrollNode(wheelEvent->rawDeltaX(), wheelEvent->granularity(), ScrollLeft, ScrollRight, startNode, &stopNode))
+ wheelEvent->setDefaultHandled();
+
+ if (scrollNode(wheelEvent->rawDeltaY(), wheelEvent->granularity(), ScrollUp, ScrollDown, startNode, &stopNode))
+ wheelEvent->setDefaultHandled();
+
+ if (!m_useLatchedWheelEventNode)
+ m_previousWheelScrolledNode = stopNode;
+}
+
+#if ENABLE(CONTEXT_MENUS)
+bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event)
+{
+ Document* doc = m_frame->document();
+ FrameView* v = m_frame->view();
+ if (!v)
+ return false;
+
+ bool swallowEvent;
+ IntPoint viewportPos = v->windowToContents(event.pos());
+ HitTestRequest request(HitTestRequest::Active);
+ MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event);
+
+ // 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, false);
+
+ return swallowEvent;
+}
+
+bool EventHandler::sendContextMenuEventForKey()
+{
+ FrameView* view = m_frame->view();
+ if (!view)
+ return false;
+
+ Document* doc = m_frame->document();
+ if (!doc)
+ return false;
+
+ static const int kContextMenuMargin = 1;
+
+#if OS(WINDOWS) && !OS(WINCE)
+ int rightAligned = ::GetSystemMetrics(SM_MENUDROPALIGNMENT);
+#else
+ int rightAligned = 0;
+#endif
+ IntPoint location;
+
+ Node* focusedNode = doc->focusedNode();
+ SelectionController* selectionController = m_frame->selection();
+ Position start = selectionController->selection().start();
+
+ if (start.node() && (selectionController->rootEditableElement() || selectionController->isRange())) {
+ RefPtr<Range> selection = selectionController->toNormalizedRange();
+ IntRect firstRect = m_frame->firstRectForRange(selection.get());
+
+ int x = rightAligned ? firstRect.right() : firstRect.x();
+ location = IntPoint(x, firstRect.bottom());
+ } else if (focusedNode) {
+ RenderBoxModelObject* box = focusedNode->renderBoxModelObject();
+ IntRect clippedRect = box->absoluteClippedOverflowRect();
+ location = clippedRect.bottomLeft();
+ } else {
+ location = IntPoint(
+ rightAligned ? view->contentsWidth() - kContextMenuMargin : kContextMenuMargin,
+ kContextMenuMargin);
+ }
+
+ m_frame->view()->setCursor(pointerCursor());
+
+ IntPoint position = view->contentsToWindow(location);
+ IntPoint globalPosition = view->contentsToScreen(IntRect(location, IntSize())).location();
+
+ Node* targetNode = doc->focusedNode();
+ if (!targetNode)
+ targetNode = doc;
+
+ // Use the focused node as the target for hover and active.
+ HitTestResult result(position);
+ result.setInnerNode(targetNode);
+ HitTestRequest request(HitTestRequest::Active);
+ doc->renderView()->layer()->updateHoverActiveState(request, result);
+ doc->updateStyleIfNeeded();
+
+ // The contextmenu event is a mouse event even when invoked using the keyboard.
+ // This is required for web compatibility.
+
+#if OS(WINDOWS)
+ MouseEventType eventType = MouseEventReleased;
+#else
+ MouseEventType eventType = MouseEventPressed;
+#endif
+
+ PlatformMouseEvent mouseEvent(position, globalPosition, RightButton, eventType, 1, false, false, false, false, WTF::currentTime());
+
+ return dispatchMouseEvent(eventNames().contextmenuEvent, targetNode, true, 0, mouseEvent, false);
+}
+
+#endif // ENABLE(CONTEXT_MENUS)
+
+void EventHandler::scheduleHoverStateUpdate()
+{
+ if (!m_hoverTimer.isActive())
+ m_hoverTimer.startOneShot(0);
+}
+
+void EventHandler::dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad& quad)
+{
+ FrameView* view = m_frame->view();
+ if (!view)
+ return;
+
+ if (m_mousePressed || !quad.containsPoint(view->windowToContents(m_currentMousePosition)))
+ return;
+
+ if (!m_fakeMouseMoveEventTimer.isActive())
+ m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveInterval);
+}
+
+void EventHandler::cancelFakeMouseMoveEvent()
+{
+ m_fakeMouseMoveEventTimer.stop();
+}
+
+void EventHandler::fakeMouseMoveEventTimerFired(Timer<EventHandler>* timer)
+{
+ ASSERT_UNUSED(timer, timer == &m_fakeMouseMoveEventTimer);
+ ASSERT(!m_mousePressed);
+
+ FrameView* view = m_frame->view();
+ if (!view)
+ return;
+
+ bool shiftKey;
+ bool ctrlKey;
+ bool altKey;
+ bool metaKey;
+ PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey);
+ IntPoint globalPoint = view->contentsToScreen(IntRect(view->windowToContents(m_currentMousePosition), IntSize())).location();
+ PlatformMouseEvent fakeMouseMoveEvent(m_currentMousePosition, globalPoint, NoButton, MouseEventMoved, 0, shiftKey, ctrlKey, altKey, metaKey, currentTime());
+ mouseMoved(fakeMouseMoveEvent);
+}
+
+// Whether or not a mouse down can begin the creation of a selection. Fires the selectStart event.
+bool EventHandler::canMouseDownStartSelect(Node* node)
+{
+ if (!node || !node->renderer())
+ return true;
+
+ // Some controls and images can't start a select on a mouse down.
+ if (!node->canStartSelection())
+ return false;
+
+ for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) {
+ if (Node* node = curr->node())
+ return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true));
+ }
+
+ return true;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::canMouseDragExtendSelect(Node* node)
+{
+ if (!node || !node->renderer())
+ return true;
+
+ for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) {
+ if (Node* node = curr->node())
+ return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true));
+ }
+
+ return true;
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet)
+{
+ m_frameSetBeingResized = frameSet;
+}
+
+void EventHandler::resizeLayerDestroyed()
+{
+ ASSERT(m_resizeLayer);
+ m_resizeLayer = 0;
+}
+
+void EventHandler::hoverTimerFired(Timer<EventHandler>*)
+{
+ m_hoverTimer.stop();
+
+ ASSERT(m_frame);
+ ASSERT(m_frame->document());
+
+ if (RenderView* renderer = m_frame->contentRenderer()) {
+ if (FrameView* view = m_frame->view()) {
+ HitTestRequest request(HitTestRequest::MouseMove);
+ HitTestResult result(view->windowToContents(m_currentMousePosition));
+ renderer->layer()->hitTest(request, result);
+ m_frame->document()->updateStyleIfNeeded();
+ }
+ }
+}
+
+static Node* eventTargetNodeForDocument(Document* doc)
+{
+ if (!doc)
+ return 0;
+ Node* node = doc->focusedNode();
+ if (!node && doc->isPluginDocument()) {
+ PluginDocument* pluginDocument = static_cast<PluginDocument*>(doc);
+ node = pluginDocument->pluginNode();
+ }
+ if (!node && doc->isHTMLDocument())
+ node = doc->body();
+ if (!node)
+ node = doc->documentElement();
+ return node;
+}
+
+bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)
+{
+ // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do.
+ // IE matches lower and upper case access keys regardless of Shift key state - but if both upper and
+ // lower case variants are present in a document, the correct element is matched based on Shift key state.
+ // Firefox only matches an access key if Shift is not pressed, and does that case-insensitively.
+ ASSERT(!(accessKeyModifiers() & PlatformKeyboardEvent::ShiftKey));
+ if ((evt.modifiers() & ~PlatformKeyboardEvent::ShiftKey) != accessKeyModifiers())
+ return false;
+ String key = evt.unmodifiedText();
+ Element* elem = m_frame->document()->getElementByAccessKey(key.lower());
+ if (!elem)
+ return false;
+ elem->accessKeyAction(false);
+ return true;
+}
+
+#if !PLATFORM(MAC)
+bool EventHandler::needsKeyboardEventDisambiguationQuirks() const
+{
+ return false;
+}
+#endif
+
+bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)
+{
+#if ENABLE(PAN_SCROLLING)
+ if (Page* page = m_frame->page()) {
+ if (page->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {
+ // If a key is pressed while the autoscroll/panScroll is in progress then we want to stop
+ if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown || initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown)
+ stopAutoscrollTimer();
+
+ // If we were in autoscroll/panscroll mode, we swallow the key event
+ return true;
+ }
+ }
+#endif
+
+ // Check for cases where we are too early for events -- possible unmatched key up
+ // from pressing return in the location bar.
+ RefPtr<Node> node = eventTargetNodeForDocument(m_frame->document());
+ if (!node)
+ return false;
+
+ UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+ if (FrameView* view = m_frame->view())
+ view->resetDeferredRepaintDelay();
+
+ // FIXME: what is this doing here, in keyboard event handler?
+ m_frame->loader()->resetMultipleFormSubmissionProtection();
+
+ // In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match.
+ // On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict
+ // with access keys. Then we dispatch keydown, but suppress its default handling.
+ // On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages.
+ // Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events.
+ bool matchedAnAccessKey = false;
+ if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown)
+ matchedAnAccessKey = handleAccessKey(initialKeyEvent);
+
+ // FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch.
+ if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp || initialKeyEvent.type() == PlatformKeyboardEvent::Char)
+ return !node->dispatchKeyEvent(initialKeyEvent);
+
+ bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks();
+
+ ExceptionCode ec;
+ PlatformKeyboardEvent keyDownEvent = initialKeyEvent;
+ if (keyDownEvent.type() != PlatformKeyboardEvent::RawKeyDown)
+ keyDownEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::RawKeyDown, backwardCompatibilityMode);
+ RefPtr<KeyboardEvent> keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
+ if (matchedAnAccessKey)
+ keydown->setDefaultPrevented(true);
+ keydown->setTarget(node);
+
+ if (initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) {
+ node->dispatchEvent(keydown, ec);
+ // If frame changed as a result of keydown dispatch, then return true to avoid sending a subsequent keypress message to the new frame.
+ bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame();
+ return keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame;
+ }
+
+ // Run input method in advance of DOM event handling. This may result in the IM
+ // modifying the page prior the keydown event, but this behaviour is necessary
+ // in order to match IE:
+ // 1. preventing default handling of keydown and keypress events has no effect on IM input;
+ // 2. if an input method handles the event, its keyCode is set to 229 in keydown event.
+ m_frame->editor()->handleInputMethodKeydown(keydown.get());
+
+ bool handledByInputMethod = keydown->defaultHandled();
+
+ if (handledByInputMethod) {
+ keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode);
+ keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
+ keydown->setTarget(node);
+ keydown->setDefaultHandled();
+ }
+
+ node->dispatchEvent(keydown, ec);
+ // If frame changed as a result of keydown dispatch, then return early to avoid sending a subsequent keypress message to the new frame.
+ bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame();
+ bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame;
+ if (handledByInputMethod || (keydownResult && !backwardCompatibilityMode))
+ return keydownResult;
+
+ // Focus may have changed during keydown handling, so refetch node.
+ // But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original node.
+ if (!keydownResult) {
+ node = eventTargetNodeForDocument(m_frame->document());
+ if (!node)
+ return false;
+ }
+
+ PlatformKeyboardEvent keyPressEvent = initialKeyEvent;
+ keyPressEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::Char, backwardCompatibilityMode);
+ if (keyPressEvent.text().isEmpty())
+ return keydownResult;
+ RefPtr<KeyboardEvent> keypress = KeyboardEvent::create(keyPressEvent, m_frame->document()->defaultView());
+ keypress->setTarget(node);
+ if (keydownResult)
+ keypress->setDefaultPrevented(true);
+#if PLATFORM(MAC)
+ keypress->keypressCommands() = keydown->keypressCommands();
+#endif
+ node->dispatchEvent(keypress, ec);
+
+ return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled();
+}
+
+void EventHandler::handleKeyboardSelectionMovement(KeyboardEvent* event)
+{
+ if (!event)
+ return;
+
+ String key = event->keyIdentifier();
+ bool isShifted = event->getModifierState("Shift");
+ bool isOptioned = event->getModifierState("Alt");
+ bool isCommanded = event->getModifierState("Meta");
+
+ if (key == "Up") {
+ m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, SelectionController::DirectionBackward, (isCommanded) ? DocumentBoundary : LineGranularity, true);
+ event->setDefaultHandled();
+ } else if (key == "Down") {
+ m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, SelectionController::DirectionForward, (isCommanded) ? DocumentBoundary : LineGranularity, true);
+ event->setDefaultHandled();
+ } else if (key == "Left") {
+ m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, SelectionController::DirectionLeft, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
+ event->setDefaultHandled();
+ } else if (key == "Right") {
+ m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, SelectionController::DirectionRight, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
+ event->setDefaultHandled();
+ }
+}
+
+void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event)
+{
+ if (event->type() == eventNames().keydownEvent) {
+ m_frame->editor()->handleKeyboardEvent(event);
+ if (event->defaultHandled())
+ return;
+ if (event->keyIdentifier() == "U+0009")
+ defaultTabEventHandler(event);
+ else {
+ FocusDirection direction = focusDirectionForKey(event->keyIdentifier());
+ if (direction != FocusDirectionNone)
+ defaultArrowEventHandler(direction, event);
+ }
+
+ // provides KB navigation and selection for enhanced accessibility users
+ if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled())
+ handleKeyboardSelectionMovement(event);
+ }
+ if (event->type() == eventNames().keypressEvent) {
+ m_frame->editor()->handleKeyboardEvent(event);
+ if (event->defaultHandled())
+ return;
+ if (event->charCode() == ' ')
+ defaultSpaceEventHandler(event);
+ }
+}
+
+FocusDirection EventHandler::focusDirectionForKey(const AtomicString& keyIdentifier) const
+{
+ DEFINE_STATIC_LOCAL(AtomicString, Down, ("Down"));
+ DEFINE_STATIC_LOCAL(AtomicString, Up, ("Up"));
+ DEFINE_STATIC_LOCAL(AtomicString, Left, ("Left"));
+ DEFINE_STATIC_LOCAL(AtomicString, Right, ("Right"));
+
+ FocusDirection retVal = FocusDirectionNone;
+
+ if (keyIdentifier == Down)
+ retVal = FocusDirectionDown;
+ else if (keyIdentifier == Up)
+ retVal = FocusDirectionUp;
+ else if (keyIdentifier == Left)
+ retVal = FocusDirectionLeft;
+ else if (keyIdentifier == Right)
+ retVal = FocusDirectionRight;
+
+ return retVal;
+}
+
+#if ENABLE(DRAG_SUPPORT)
+bool EventHandler::dragHysteresisExceeded(const FloatPoint& floatDragViewportLocation) const
+{
+ IntPoint dragViewportLocation((int)floatDragViewportLocation.x(), (int)floatDragViewportLocation.y());
+ return dragHysteresisExceeded(dragViewportLocation);
+}
+
+bool EventHandler::dragHysteresisExceeded(const IntPoint& dragViewportLocation) const
+{
+ FrameView* view = m_frame->view();
+ if (!view)
+ return false;
+ IntPoint dragLocation = view->windowToContents(dragViewportLocation);
+ IntSize delta = dragLocation - m_mouseDownPos;
+
+ int threshold = GeneralDragHysteresis;
+ if (dragState().m_dragSrcIsImage)
+ threshold = ImageDragHysteresis;
+ else if (dragState().m_dragSrcIsLink)
+ threshold = LinkDragHysteresis;
+ else if (dragState().m_dragSrcInSelection)
+ threshold = TextDragHysteresis;
+
+ return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold;
+}
+
+void EventHandler::freeClipboard()
+{
+ if (dragState().m_dragClipboard)
+ dragState().m_dragClipboard->setAccessPolicy(ClipboardNumb);
+}
+
+bool EventHandler::shouldDragAutoNode(Node* node, const IntPoint& point) const
+{
+ if (!node || !m_frame->view())
+ return false;
+ Page* page = m_frame->page();
+ return page && page->dragController()->mayStartDragAtEventLocation(m_frame, point, node);
+}
+
+void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation)
+{
+ if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
+ dragState().m_dragClipboard->setDestinationOperation(operation);
+ // for now we don't care if event handler cancels default behavior, since there is none
+ dispatchDragSrcEvent(eventNames().dragendEvent, event);
+ }
+ freeClipboard();
+ dragState().m_dragSrc = 0;
+ // In case the drag was ended due to an escape key press we need to ensure
+ // that consecutive mousemove events don't reinitiate the drag and drop.
+ m_mouseDownMayStartDrag = false;
+}
+
+// returns if we should continue "default processing", i.e., whether eventhandler canceled
+bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event)
+{
+ return !dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragClipboard.get());
+}
+
+bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event)
+{
+ if (event.event().button() != LeftButton || event.event().eventType() != MouseEventMoved) {
+ // If we allowed the other side of the bridge to handle a drag
+ // last time, then m_mousePressed might still be set. So we
+ // clear it now to make sure the next move after a drag
+ // doesn't look like a drag.
+ m_mousePressed = false;
+ return false;
+ }
+
+ if (eventLoopHandleMouseDragged(event))
+ return true;
+
+ // Careful that the drag starting logic stays in sync with eventMayStartDrag()
+
+ if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
+ allowDHTMLDrag(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA);
+ if (!dragState().m_dragSrcMayBeDHTML && !dragState().m_dragSrcMayBeUA)
+ m_mouseDownMayStartDrag = false; // no element is draggable
+ }
+
+ if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
+ // try to find an element that wants to be dragged
+ HitTestRequest request(HitTestRequest::ReadOnly);
+ HitTestResult result(m_mouseDownPos);
+ m_frame->contentRenderer()->layer()->hitTest(request, result);
+ Node* node = result.innerNode();
+ if (node && node->renderer())
+ dragState().m_dragSrc = node->renderer()->draggableNode(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA,
+ m_mouseDownPos.x(), m_mouseDownPos.y(), dragState().m_dragSrcIsDHTML);
+ else
+ dragState().m_dragSrc = 0;
+
+ if (!dragState().m_dragSrc)
+ m_mouseDownMayStartDrag = false; // no element is draggable
+ else {
+ // remember some facts about this source, while we have a HitTestResult handy
+ node = result.URLElement();
+ dragState().m_dragSrcIsLink = node && node->isLink();
+
+ node = result.innerNonSharedNode();
+ dragState().m_dragSrcIsImage = node && node->renderer() && node->renderer()->isImage();
+
+ dragState().m_dragSrcInSelection = m_frame->selection()->contains(m_mouseDownPos);
+ }
+ }
+
+ // For drags starting in the selection, the user must wait between the mousedown and mousedrag,
+ // or else we bail on the dragging stuff and allow selection to occur
+ if (m_mouseDownMayStartDrag && !dragState().m_dragSrcIsImage && dragState().m_dragSrcInSelection && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) {
+ m_mouseDownMayStartDrag = false;
+ dragState().m_dragSrc = 0;
+ // ...but if this was the first click in the window, we don't even want to start selection
+ if (eventActivatedView(event.event()))
+ m_mouseDownMayStartSelect = false;
+ }
+
+ if (!m_mouseDownMayStartDrag)
+ return !mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll;
+
+ // We are starting a text/image/url drag, so the cursor should be an arrow
+ if (FrameView* view = m_frame->view()) {
+ // FIXME <rdar://7577595>: Custom cursors aren't supported during drag and drop (default to pointer).
+ view->setCursor(pointerCursor());
+ }
+
+ if (!dragHysteresisExceeded(event.event().pos()))
+ return true;
+
+ // Once we're past the hysteresis point, we don't want to treat this gesture as a click
+ invalidateClick();
+
+ DragOperation srcOp = DragOperationNone;
+
+ freeClipboard(); // would only happen if we missed a dragEnd. Do it anyway, just
+ // to make sure it gets numbified
+ dragState().m_dragClipboard = createDraggingClipboard();
+
+ if (dragState().m_dragSrcMayBeDHTML) {
+ // Check to see if the is a DOM based drag, if it is get the DOM specified drag
+ // image and offset
+ if (dragState().m_dragSrcIsDHTML) {
+ if (RenderObject* renderer = dragState().m_dragSrc->renderer()) {
+ // FIXME: This doesn't work correctly with transforms.
+ FloatPoint absPos = renderer->localToAbsolute();
+ IntSize delta = m_mouseDownPos - roundedIntPoint(absPos);
+ dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), toPoint(delta));
+ } else {
+ // The renderer has disappeared, this can happen if the onStartDrag handler has hidden
+ // the element in some way. In this case we just kill the drag.
+ m_mouseDownMayStartDrag = false;
+ goto cleanupDrag;
+ }
+ }
+
+ m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown)
+ && !m_frame->selection()->isInPasswordField();
+
+ // Invalidate clipboard here against anymore pasteboard writing for security. The drag
+ // image can still be changed as we drag, but not the pasteboard data.
+ dragState().m_dragClipboard->setAccessPolicy(ClipboardImageWritable);
+
+ if (m_mouseDownMayStartDrag) {
+ // gather values from DHTML element, if it set any
+ srcOp = dragState().m_dragClipboard->sourceOperation();
+
+ // Yuck, a draggedImage:moveTo: message can be fired as a result of kicking off the
+ // drag with dragImage! Because of that dumb reentrancy, we may think we've not
+ // started the drag when that happens. So we have to assume it's started before we
+ // kick it off.
+ dragState().m_dragClipboard->setDragHasStarted();
+ }
+ }
+
+ if (m_mouseDownMayStartDrag) {
+ Page* page = m_frame->page();
+ DragController* dragController = page ? page->dragController() : 0;
+ bool startedDrag = dragController && dragController->startDrag(m_frame, dragState().m_dragClipboard.get(), srcOp, event.event(), m_mouseDownPos, dragState().m_dragSrcIsDHTML);
+ if (!startedDrag && dragState().m_dragSrcMayBeDHTML) {
+ // Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event
+ dispatchDragSrcEvent(eventNames().dragendEvent, event.event());
+ m_mouseDownMayStartDrag = false;
+ }
+ }
+
+cleanupDrag:
+ if (!m_mouseDownMayStartDrag) {
+ // something failed to start the drag, cleanup
+ freeClipboard();
+ dragState().m_dragSrc = 0;
+ }
+
+ // No more default handling (like selection), whether we're past the hysteresis bounds or not
+ return true;
+}
+#endif // ENABLE(DRAG_SUPPORT)
+
+bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, bool isLineBreak, bool isBackTab)
+{
+ // Platforms should differentiate real commands like selectAll from text input in disguise (like insertNewline),
+ // and avoid dispatching text input events from keydown default handlers.
+ ASSERT(!underlyingEvent || !underlyingEvent->isKeyboardEvent() || static_cast<KeyboardEvent*>(underlyingEvent)->type() == eventNames().keypressEvent);
+
+ if (!m_frame)
+ return false;
+
+ EventTarget* target;
+ if (underlyingEvent)
+ target = underlyingEvent->target();
+ else
+ target = eventTargetNodeForDocument(m_frame->document());
+ if (!target)
+ return false;
+
+ if (FrameView* view = m_frame->view())
+ view->resetDeferredRepaintDelay();
+
+ RefPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text);
+ event->setUnderlyingEvent(underlyingEvent);
+ event->setIsLineBreak(isLineBreak);
+ event->setIsBackTab(isBackTab);
+ ExceptionCode ec;
+ target->dispatchEvent(event, ec);
+ return event->defaultHandled();
+}
+
+#if !PLATFORM(MAC) && !PLATFORM(QT) && !PLATFORM(HAIKU) && !PLATFORM(EFL)
+bool EventHandler::invertSenseOfTabsToLinks(KeyboardEvent*) const
+{
+ return false;
+}
+#endif
+
+bool EventHandler::tabsToLinks(KeyboardEvent* event) const
+{
+ Page* page = m_frame->page();
+ if (!page)
+ return false;
+
+ if (page->chrome()->client()->tabsToLinks())
+ return !invertSenseOfTabsToLinks(event);
+
+ return invertSenseOfTabsToLinks(event);
+}
+
+void EventHandler::defaultTextInputEventHandler(TextEvent* event)
+{
+ 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::defaultArrowEventHandler(FocusDirection focusDirection, KeyboardEvent* event)
+{
+ if (event->ctrlKey() || event->metaKey() || event->altGraphKey() || event->shiftKey())
+ return;
+
+ Page* page = m_frame->page();
+ if (!page)
+ return;
+
+ if (!page->settings() || !page->settings()->isSpatialNavigationEnabled())
+ return;
+
+ // Arrows and other possible directional navigation keys can be used in design
+ // mode editing.
+ if (m_frame->document()->inDesignMode())
+ return;
+
+ if (page->focusController()->advanceFocus(focusDirection, event))
+ event->setDefaultHandled();
+}
+
+void EventHandler::defaultTabEventHandler(KeyboardEvent* event)
+{
+ // We should only advance focus on tabs if no special modifier keys are held down.
+ if (event->ctrlKey() || event->metaKey() || event->altGraphKey())
+ return;
+
+ Page* page = m_frame->page();
+ if (!page)
+ return;
+ if (!page->tabKeyCyclesThroughElements())
+ return;
+
+ FocusDirection focusDirection = event->shiftKey() ? FocusDirectionBackward : FocusDirectionForward;
+
+ // Tabs can be used in design mode editing.
+ if (m_frame->document()->inDesignMode())
+ return;
+
+ if (page->focusController()->advanceFocus(focusDirection, event))
+ event->setDefaultHandled();
+}
+
+void EventHandler::capsLockStateMayHaveChanged()
+{
+ Document* d = m_frame->document();
+ if (Node* node = d->focusedNode()) {
+ if (RenderObject* r = node->renderer()) {
+ if (r->isTextField())
+ toRenderTextControlSingleLine(r)->capsLockStateMayHaveChanged();
+ }
+ }
+}
+
+void EventHandler::sendResizeEvent()
+{
+ m_frame->document()->dispatchWindowEvent(Event::create(eventNames().resizeEvent, false, false));
+}
+
+void EventHandler::sendScrollEvent()
+{
+ setFrameWasScrolledByUser();
+ if (m_frame->view() && m_frame->document())
+ m_frame->document()->dispatchEvent(Event::create(eventNames().scrollEvent, true, false));
+}
+
+void EventHandler::setFrameWasScrolledByUser()
+{
+ FrameView* v = m_frame->view();
+ if (v)
+ v->setWasScrolledByUser(true);
+}
+
+bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar)
+{
+ if (!scrollbar || !scrollbar->enabled())
+ return false;
+ setFrameWasScrolledByUser();
+ return scrollbar->mouseDown(mev.event());
+}
+
+// If scrollbar (under mouse) is different from last, send a mouse exited. Set
+// last to scrollbar if setLast is true; else set last to 0.
+void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool setLast)
+{
+ if (m_lastScrollbarUnderMouse != scrollbar) {
+ // Send mouse exited to the old scrollbar.
+ if (m_lastScrollbarUnderMouse)
+ m_lastScrollbarUnderMouse->mouseExited();
+ m_lastScrollbarUnderMouse = setLast ? scrollbar : 0;
+ }
+}
+
+#if ENABLE(TOUCH_EVENTS)
+static PassRefPtr<TouchList> assembleTargetTouches(Touch* touchTarget, TouchList* touches)
+{
+ RefPtr<TouchList> targetTouches = TouchList::create();
+
+ for (unsigned i = 0; i < touches->length(); ++i) {
+ if (touches->item(i)->target()->toNode()->isSameNode(touchTarget->target()->toNode()))
+ targetTouches->append(touches->item(i));
+ }
+
+ return targetTouches.release();
+}
+
+static float pageZoomFactor(Frame* frame)
+{
+ FrameView* view = frame->view();
+ return view ? view->pageZoomFactor() : 1.0f;
+}
+
+#if ENABLE(TRANSFORMACTION_EVENTS)
+static bool hasTransformActionEventListener(Node* target)
+{
+ for (Node* n = target; n; n = n->eventParentNode()) {
+ if (n->hasEventListeners(eventNames().transformactionstartEvent)
+ || n->hasEventListeners(eventNames().transformactionupdateEvent)
+ || n->hasEventListeners(eventNames().transformactionendEvent))
+ return true;
+ }
+ return false;
+}
+#endif
+
+bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
+{
+ RefPtr<TouchList> touches = TouchList::create();
+ RefPtr<TouchList> pressedTouches = TouchList::create();
+ RefPtr<TouchList> releasedTouches = TouchList::create();
+ RefPtr<TouchList> movedTouches = TouchList::create();
+ RefPtr<TouchList> cancelTouches = TouchList::create();
+
+ const Vector<PlatformTouchPoint>& points = event.touchPoints();
+ AtomicString* eventName = 0;
+
+ UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
+
+#if ENABLE(TRANSFORMACTION_EVENTS)
+ Vector<const PlatformTouchPoint*> gestureTouchPoints;
+#endif
+
+ for (unsigned i = 0; i < points.size(); ++i) {
+ const PlatformTouchPoint& point = points[i];
+ IntPoint pagePoint = documentPointForWindowPoint(m_frame, point.pos());
+
+ HitTestRequest::HitTestRequestType hitType = HitTestRequest::Active | HitTestRequest::ReadOnly;
+ // The HitTestRequest types used for mouse events map quite adequately
+ // to touch events. Note that in addition to meaning that the hit test
+ // should affect the active state of the current node if necessary,
+ // HitTestRequest::Active signifies that the hit test is taking place
+ // with the mouse (or finger in this case) being pressed.
+ switch (point.state()) {
+ case PlatformTouchPoint::TouchPressed:
+ hitType = HitTestRequest::Active;
+ break;
+ case PlatformTouchPoint::TouchMoved:
+ hitType = HitTestRequest::Active | HitTestRequest::MouseMove | HitTestRequest::ReadOnly;
+ break;
+ case PlatformTouchPoint::TouchReleased:
+ case PlatformTouchPoint::TouchCancelled:
+ hitType = HitTestRequest::MouseUp;
+ break;
+ default:
+ break;
+ }
+
+ HitTestResult result = hitTestResultAtPoint(pagePoint, /*allowShadowContent*/ false, false, DontHitTestScrollbars, hitType);
+ Node* target = result.innerNode();
+
+ // Touch events should not go to text nodes
+ if (target && target->isTextNode())
+ target = target->parentNode();
+
+#if ENABLE(HAPTICS)
+ if (!m_hapticFeedbackCancelled) {
+ RenderObject* renderer = target ? target->renderer() : 0;
+ RenderStyle* style = renderer ? renderer->style() : 0;
+ if (style) {
+ if (point.state() == PlatformTouchPoint::TouchPressed) {
+ if (m_firstTouchedNode || style->hapticTapStrength() == HNONE)
+ m_hapticFeedbackCancelled = true;
+ else {
+ playPressHaptics(style->hapticTapType(), style->hapticTapStrength());
+ m_firstTouchedNode = target;
+ }
+ } else if (point.state() == PlatformTouchPoint::TouchReleased) {
+ if (target == m_firstTouchedNode)
+ playReleaseHaptics(style->hapticTapType(), style->hapticTapStrength());
+ m_firstTouchedNode = 0;
+ }
+ }
+ } else if (points.size() == 1 && point.state() == PlatformTouchPoint::TouchReleased) {
+ m_hapticFeedbackCancelled = false;
+ m_firstTouchedNode = 0;
+ }
+#endif
+
+ Document* doc = target->document();
+ if (!doc)
+ continue;
+
+#if ENABLE(TRANSFORMACTION_EVENTS)
+ if (doc->hasListenerType(Document::TRANSFORMACTION_LISTENER)) {
+ if (point.state() == PlatformTouchPoint::TouchPressed
+ && m_gestureTouchPointIds.size() < 2) {
+ if (m_gestureTouchPointIds.size() == 1)
+ m_gestureTouchPointIds.append(point.id());
+ else if (points.size() < 3) {
+ if (hasTransformActionEventListener(target)) {
+ m_transformActionTarget = target;
+ m_gestureTouchPointIds.append(point.id());
+ // If there are two touchpoints, add the other one too
+ if (points.size() == 2)
+ m_gestureTouchPointIds.append(points[1 - i].id());
+ }
+ }
+ }
+
+ if ((m_gestureTouchPointIds.size() > 0 && m_gestureTouchPointIds[0] == point.id())
+ || (m_gestureTouchPointIds.size() > 1 && m_gestureTouchPointIds[1] == point.id())) {
+ gestureTouchPoints.append(&point);
+ if (point.state() == PlatformTouchPoint::TouchReleased
+ || point.state() == PlatformTouchPoint::TouchCancelled) {
+ if (point.id() == m_gestureTouchPointIds[0])
+ m_gestureTouchPointIds.remove(0);
+ else
+ m_gestureTouchPointIds.remove(1);
+ }
+ }
+ }
+#endif // ENABLE(TRANSFORMACTION_EVENTS)
+
+ if (!doc->hasListenerType(Document::TOUCH_LISTENER))
+ continue;
+
+ if (m_frame != doc->frame()) {
+ // pagePoint should always be relative to the target elements containing frame.
+ pagePoint = documentPointForWindowPoint(doc->frame(), point.pos());
+ }
+
+ int adjustedPageX = lroundf(pagePoint.x() / pageZoomFactor(m_frame));
+ int adjustedPageY = lroundf(pagePoint.y() / pageZoomFactor(m_frame));
+
+ // Increment the platform touch id by 1 to avoid storing a key of 0 in the hashmap.
+ unsigned touchPointTargetKey = point.id() + 1;
+ RefPtr<EventTarget> touchTarget;
+ if (point.state() == PlatformTouchPoint::TouchPressed) {
+ m_originatingTouchPointTargets.set(touchPointTargetKey, target);
+ touchTarget = target;
+ } else if (point.state() == PlatformTouchPoint::TouchReleased || point.state() == PlatformTouchPoint::TouchCancelled) {
+ // The target should be the original target for this touch, so get it from the hashmap. As it's a release or cancel
+ // we also remove it from the map.
+ touchTarget = m_originatingTouchPointTargets.take(touchPointTargetKey);
+ } else
+ touchTarget = m_originatingTouchPointTargets.get(touchPointTargetKey);
+
+ if (!touchTarget.get())
+ continue;
+
+ RefPtr<Touch> touch = Touch::create(doc->frame(), touchTarget.get(), point.id(),
+ point.screenPos().x(), point.screenPos().y(),
+ adjustedPageX, adjustedPageY);
+
+ // touches should contain information about every touch currently on the screen.
+ if (point.state() != PlatformTouchPoint::TouchReleased)
+ touches->append(touch);
+
+ // Now build up the correct list for changedTouches.
+ // Note that any touches that are in the TouchStationary state (e.g. if
+ // the user had several points touched but did not move them all) should
+ // only be present in the touches list. They may also be added to the
+ // targetTouches list later, but should never be in the changedTouches
+ // list so we do not handle them explicitly here.
+ // See https://bugs.webkit.org/show_bug.cgi?id=37609 for further discussion
+ // about the TouchStationary state.
+ if (point.state() == PlatformTouchPoint::TouchReleased)
+ releasedTouches->append(touch);
+ else if (point.state() == PlatformTouchPoint::TouchCancelled)
+ cancelTouches->append(touch);
+ else if (point.state() == PlatformTouchPoint::TouchPressed)
+ pressedTouches->append(touch);
+ else if (point.state() == PlatformTouchPoint::TouchMoved)
+ movedTouches->append(touch);
+ }
+
+ m_touchPressed = touches->length() > 0;
+
+ bool defaultPrevented = false;
+ Touch* changedTouch = 0;
+ EventTarget* touchEventTarget = 0;
+
+ if (cancelTouches->length() > 0) {
+ // We dispatch the event to the target of the touch that caused this touch event to be generated, i.e.
+ // we take it from the list that will be used as the changedTouches property of the event.
+ // The choice to use the touch at index 0 guarantees that there is a target (as we checked the length
+ // above). In the case that there are multiple touches in what becomes the changedTouches list, it is
+ // difficult to say how we should prioritise touches and as such, item 0 is an arbitrary choice.
+ changedTouch = cancelTouches->item(0);
+ ASSERT(changedTouch);
+ touchEventTarget = changedTouch->target();
+ ASSERT(touchEventTarget);
+
+ eventName = &eventNames().touchcancelEvent;
+ RefPtr<TouchEvent> cancelEv =
+ TouchEvent::create(TouchList::create().get(), TouchList::create().get(), cancelTouches.get(),
+ *eventName, touchEventTarget->toNode()->document()->defaultView(),
+ 0, 0, 0, 0, event.ctrlKey(), event.altKey(), event.shiftKey(),
+ event.metaKey());
+ ExceptionCode ec = 0;
+ touchEventTarget->dispatchEvent(cancelEv.get(), ec);
+ defaultPrevented |= cancelEv->defaultPrevented();
+ }
+
+ if (releasedTouches->length() > 0) {
+ Touch* changedTouch = releasedTouches->item(0);
+ ASSERT(changedTouch);
+ touchEventTarget = changedTouch->target();
+ ASSERT(touchEventTarget);
+
+ RefPtr<TouchList> targetTouches = assembleTargetTouches(changedTouch, touches.get());
+
+ eventName = &eventNames().touchendEvent;
+ RefPtr<TouchEvent> endEv =
+ TouchEvent::create(touches.get(), targetTouches.get(), releasedTouches.get(),
+ *eventName, touchEventTarget->toNode()->document()->defaultView(),
+ 0, 0, 0, 0, event.ctrlKey(), event.altKey(), event.shiftKey(),
+ event.metaKey());
+ ExceptionCode ec = 0;
+ touchEventTarget->dispatchEvent(endEv.get(), ec);
+ defaultPrevented |= endEv->defaultPrevented();
+ }
+ if (pressedTouches->length() > 0) {
+ Touch* changedTouch = pressedTouches->item(0);
+ ASSERT(changedTouch);
+ touchEventTarget = changedTouch->target();
+ ASSERT(touchEventTarget);
+
+ RefPtr<TouchList> targetTouches = assembleTargetTouches(changedTouch, touches.get());
+
+ eventName = &eventNames().touchstartEvent;
+ RefPtr<TouchEvent> startEv =
+ TouchEvent::create(touches.get(), targetTouches.get(), pressedTouches.get(),
+ *eventName, touchEventTarget->toNode()->document()->defaultView(),
+ 0, 0, 0, 0, event.ctrlKey(), event.altKey(), event.shiftKey(),
+ event.metaKey());
+ ExceptionCode ec = 0;
+ touchEventTarget->dispatchEvent(startEv.get(), ec);
+ defaultPrevented |= startEv->defaultPrevented();
+ }
+
+ if (movedTouches->length() > 0) {
+ Touch* changedTouch = movedTouches->item(0);
+ ASSERT(changedTouch);
+ touchEventTarget = changedTouch->target();
+ ASSERT(touchEventTarget);
+
+ RefPtr<TouchList> targetTouches = assembleTargetTouches(changedTouch, touches.get());
+
+ eventName = &eventNames().touchmoveEvent;
+ RefPtr<TouchEvent> moveEv =
+ TouchEvent::create(touches.get(), targetTouches.get(), movedTouches.get(),
+ *eventName, touchEventTarget->toNode()->document()->defaultView(),
+ 0, 0, 0, 0, event.ctrlKey(), event.altKey(), event.shiftKey(),
+ event.metaKey());
+ ExceptionCode ec = 0;
+ touchEventTarget->dispatchEvent(moveEv.get(), ec);
+ defaultPrevented |= moveEv->defaultPrevented();
+ }
+
+#if ENABLE(TRANSFORMACTION_EVENTS)
+ if (gestureTouchPoints.size() > 0 && m_transformActionTarget.get()) {
+ eventName = &eventNames().transformactionupdateEvent;
+ if (!m_transformActionActive) {
+ eventName = &eventNames().transformactionstartEvent;
+ m_transformActionActive = true;
+ m_touchGesture.reset();
+ } else if (m_gestureTouchPointIds.isEmpty()) {
+ eventName = &eventNames().transformactionendEvent;
+ m_transformActionActive = false;
+ }
+
+ m_touchGesture.updateTouchPoints(gestureTouchPoints);
+
+ Frame* targetFrame = m_transformActionTarget->toNode()->document()->frame();
+ IntPoint pagePoint = documentPointForWindowPoint(targetFrame, m_touchGesture.pos());
+ int adjustedPageX = lroundf(pagePoint.x() / pageZoomFactor(m_frame));
+ int adjustedPageY = lroundf(pagePoint.y() / pageZoomFactor(m_frame));
+ RefPtr<TransformActionEvent> transformActionEv =
+ TransformActionEvent::create(*eventName, true, true,
+ m_transformActionTarget->toNode()->document()->defaultView(),
+ m_touchGesture.screenPos().x(), m_touchGesture.screenPos().y(),
+ adjustedPageX, adjustedPageY,
+ event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
+ m_touchGesture.translateX(), m_touchGesture.translateY(), 0, 0,
+ m_touchGesture.scale(), 1.0f, m_touchGesture.rotate(), 0);
+ ExceptionCode ec = 0;
+ m_transformActionTarget->dispatchEvent(transformActionEv.get(), ec);
+ defaultPrevented |= transformActionEv->defaultPrevented();
+
+ // Clear the transformaction target if transformaction is not active anymore
+ if (!m_transformActionActive && m_transformActionTarget.get())
+ m_transformActionTarget.clear();
+ }
+#endif // ENABLE(TRANSFORMACTION_EVENTS)
+
+ return defaultPrevented;
+}
+#endif
+
+}