#include "config.h"
#include "EventHandler.h"
#include "AXObjectCache.h"
#include "AutoscrollController.h"
#include "CachedImage.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "Cursor.h"
#include "CursorList.h"
#include "Document.h"
#include "DocumentEventQueue.h"
#include "DragController.h"
#include "DragState.h"
#include "Editor.h"
#include "EditorClient.h"
#include "EventNames.h"
#include "EventPathWalker.h"
#include "ExceptionCodePlaceholder.h"
#include "FloatPoint.h"
#include "FloatRect.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameSelection.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "htmlediting.h"
#include "HTMLFrameElementBase.h"
#include "HTMLFrameSetElement.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HitTestRequest.h"
#include "HitTestResult.h"
#include "Image.h"
#include "InspectorInstrumentation.h"
#include "KeyboardEvent.h"
#include "MouseEvent.h"
#include "MouseEventWithHitTestResults.h"
#include "Page.h"
#include "PlatformEvent.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 "RuntimeApplicationChecks.h"
#include "ScrollAnimator.h"
#include "Scrollbar.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "SpatialNavigation.h"
#include "StyleCachedImage.h"
#include "TextEvent.h"
#include "TextIterator.h"
#include "UserTypingGestureIndicator.h"
#include "WheelEvent.h"
#include "WindowsKeyboardCodes.h"
#include <wtf/Assertions.h>
#include <wtf/CurrentTime.h>
#include <wtf/StdLibExtras.h>
#include <wtf/TemporaryChange.h>
#if ENABLE(GESTURE_EVENTS)
#include "PlatformGestureEvent.h"
#endif
#if ENABLE(TOUCH_ADJUSTMENT)
#include "TouchAdjustment.h"
#endif
#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"
#include "TouchList.h"
#endif
#if ENABLE(CSS_IMAGE_SET)
#include "StyleCachedImageSet.h"
#endif
namespace WebCore {
using namespace HTMLNames;
#if ENABLE(DRAG_SUPPORT)
const int LinkDragHysteresis = 40;
const int ImageDragHysteresis = 5;
const int TextDragHysteresis = 3;
const int GeneralDragHysteresis = 3;
#endif // ENABLE(DRAG_SUPPORT)
const int CompositionEventKeyCode = 229;
#if ENABLE(SVG)
using namespace SVGNames;
#endif
const double fakeMouseMoveDurationThreshold = 0.01;
const double fakeMouseMoveShortInterval = 0.1;
const double fakeMouseMoveLongInterval = 0.25;
const double cursorUpdateInterval = 0.02;
const int maximumCursorSize = 128;
#if ENABLE(MOUSE_CURSOR_SCALE)
const double minimumCursorScale = 0.001;
#endif
enum NoCursorChangeType { NoCursorChange };
class OptionalCursor {
public:
OptionalCursor(NoCursorChangeType) : m_isCursorChange(false) { }
OptionalCursor(const Cursor& cursor) : m_isCursorChange(true), m_cursor(cursor) { }
bool isCursorChange() const { return m_isCursorChange; }
const Cursor& cursor() const { ASSERT(m_isCursorChange); return m_cursor; }
private:
bool m_isCursorChange;
Cursor m_cursor;
};
class MaximumDurationTracker {
public:
explicit MaximumDurationTracker(double *maxDuration)
: m_maxDuration(maxDuration)
, m_start(monotonicallyIncreasingTime())
{
}
~MaximumDurationTracker()
{
*m_maxDuration = max(*m_maxDuration, monotonicallyIncreasingTime() - m_start);
}
private:
double* m_maxDuration;
double m_start;
};
#if ENABLE(TOUCH_EVENTS)
class SyntheticTouchPoint : public PlatformTouchPoint {
public:
explicit SyntheticTouchPoint(const PlatformMouseEvent& event)
{
const static int idDefaultValue = 0;
const static int radiusYDefaultValue = 1;
const static int radiusXDefaultValue = 1;
const static float rotationAngleDefaultValue = 0.0f;
const static float forceDefaultValue = 1.0f;
m_id = idDefaultValue; m_screenPos = event.globalPosition();
m_pos = event.position();
m_radiusY = radiusYDefaultValue;
m_radiusX = radiusXDefaultValue;
m_rotationAngle = rotationAngleDefaultValue;
m_force = forceDefaultValue;
PlatformEvent::Type type = event.type();
ASSERT(type == PlatformEvent::MouseMoved || type == PlatformEvent::MousePressed || type == PlatformEvent::MouseReleased);
switch (type) {
case PlatformEvent::MouseMoved:
m_state = TouchMoved;
break;
case PlatformEvent::MousePressed:
m_state = TouchPressed;
break;
case PlatformEvent::MouseReleased:
m_state = TouchReleased;
break;
default:
ASSERT_NOT_REACHED();
break;
}
}
};
class SyntheticSingleTouchEvent : public PlatformTouchEvent {
public:
explicit SyntheticSingleTouchEvent(const PlatformMouseEvent& event)
{
switch (event.type()) {
case PlatformEvent::MouseMoved:
m_type = TouchMove;
break;
case PlatformEvent::MousePressed:
m_type = TouchStart;
break;
case PlatformEvent::MouseReleased:
m_type = TouchEnd;
break;
default:
ASSERT_NOT_REACHED();
m_type = NoType;
break;
}
m_timestamp = event.timestamp();
m_modifiers = event.modifiers();
m_touchPoints.append(SyntheticTouchPoint(event));
}
};
#endif
static inline ScrollGranularity wheelGranularityToScrollGranularity(unsigned deltaMode)
{
switch (deltaMode) {
case WheelEvent::DOM_DELTA_PAGE:
return ScrollByPage;
case WheelEvent::DOM_DELTA_LINE:
return ScrollByLine;
case WheelEvent::DOM_DELTA_PIXEL:
return ScrollByPixel;
default:
return ScrollByPixel;
}
}
static inline bool scrollNode(float delta, ScrollGranularity granularity, ScrollDirection positiveDirection, ScrollDirection negativeDirection, Node* node, Node** stopNode)
{
if (!delta)
return false;
if (!node->renderer())
return false;
RenderBox* enclosingBox = node->renderer()->enclosingBox();
float absDelta = delta > 0 ? delta : -delta;
return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, granularity, absDelta, stopNode);
}
static inline bool shouldGesturesTriggerActive()
{
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)
, m_dragMayStartSelectionInstead(false)
#endif
, m_mouseDownWasSingleClickInSelection(false)
, m_selectionInitiationState(HaveNotStartedSelection)
, m_hoverTimer(this, &EventHandler::hoverTimerFired)
, m_cursorUpdateTimer(this, &EventHandler::cursorUpdateTimerFired)
, m_autoscrollController(adoptPtr(new AutoscrollController))
, 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_mousePositionIsUnknown(true)
, m_mouseDownTimestamp(0)
, m_inTrackingScrollGesturePhase(false)
, m_widgetIsLatched(false)
#if PLATFORM(MAC)
, m_mouseDownView(nil)
, m_sendingEventToSubview(false)
, m_activationEventNumber(-1)
#endif
#if ENABLE(TOUCH_EVENTS)
, m_originatingTouchPointTargetKey(0)
, m_touchPressed(false)
#endif
#if ENABLE(GESTURE_EVENTS)
, m_scrollGestureHandlingNode(0)
, m_lastHitTestResultOverWidget(false)
#endif
, m_maxMouseMovedDuration(0)
, m_baseEventType(PlatformEvent::NoType)
, m_didStartDrag(false)
, m_didLongPressInvokeContextMenu(false)
, m_isHandlingWheelEvent(false)
#if ENABLE(CURSOR_VISIBILITY)
, m_autoHideCursorTimer(this, &EventHandler::autoHideCursorTimerFired)
#endif
{
}
EventHandler::~EventHandler()
{
ASSERT(!m_fakeMouseMoveEventTimer.isActive());
#if ENABLE(CURSOR_VISIBILITY)
ASSERT(!m_autoHideCursorTimer.isActive());
#endif
}
#if ENABLE(DRAG_SUPPORT)
DragState& EventHandler::dragState()
{
DEFINE_STATIC_LOCAL(DragState, state, ());
return state;
}
#endif // ENABLE(DRAG_SUPPORT)
void EventHandler::clear()
{
m_hoverTimer.stop();
m_cursorUpdateTimer.stop();
m_fakeMouseMoveEventTimer.stop();
#if ENABLE(CURSOR_VISIBILITY)
cancelAutoHideCursorTimer();
#endif
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_mousePositionIsUnknown = true;
m_lastKnownMousePosition = IntPoint();
m_lastKnownMouseGlobalPosition = IntPoint();
m_lastMouseDownUserGestureToken.clear();
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();
m_originatingTouchPointDocument.clear();
m_originatingTouchPointTargetKey = 0;
#endif
#if ENABLE(GESTURE_EVENTS)
m_scrollGestureHandlingNode = 0;
m_lastHitTestResultOverWidget = false;
m_previousGestureScrolledNode = 0;
m_scrollbarHandlingScrollGesture = 0;
#endif
m_maxMouseMovedDuration = 0;
m_baseEventType = PlatformEvent::NoType;
m_didStartDrag = false;
m_didLongPressInvokeContextMenu = false;
}
void EventHandler::nodeWillBeRemoved(Node* nodeToBeRemoved)
{
if (nodeToBeRemoved->contains(m_clickNode.get()))
m_clickNode = 0;
}
static void setSelectionIfNeeded(FrameSelection* selection, const VisibleSelection& newSelection)
{
ASSERT(selection);
if (selection->selection() != newSelection && selection->shouldChangeSelection(newSelection))
selection->setSelection(newSelection);
}
static inline bool dispatchSelectStart(Node* node)
{
if (!node || !node->renderer())
return true;
return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true));
}
static VisibleSelection expandSelectionToRespectUserSelectAll(Node* targetNode, const VisibleSelection& selection)
{
#if ENABLE(USERSELECT_ALL)
Node* rootUserSelectAll = Position::rootUserSelectAllForNode(targetNode);
if (!rootUserSelectAll)
return selection;
VisibleSelection newSelection(selection);
newSelection.setBase(positionBeforeNode(rootUserSelectAll).upstream(CanCrossEditingBoundary));
newSelection.setExtent(positionAfterNode(rootUserSelectAll).downstream(CanCrossEditingBoundary));
return newSelection;
#else
UNUSED_PARAM(targetNode);
return selection;
#endif
}
bool EventHandler::updateSelectionForMouseDownDispatchingSelectStart(Node* targetNode, const VisibleSelection& selection, TextGranularity granularity)
{
if (Position::nodeIsUserSelectNone(targetNode))
return false;
if (!dispatchSelectStart(targetNode))
return false;
if (selection.isRange())
m_selectionInitiationState = ExtendedSelection;
else {
granularity = CharacterGranularity;
m_selectionInitiationState = PlacedCaret;
}
m_frame->selection()->setNonDirectionalSelectionIfNeeded(selection, granularity);
return true;
}
void EventHandler::selectClosestWordFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace)
{
Node* innerNode = result.targetNode();
VisibleSelection newSelection;
if (innerNode && innerNode->renderer()) {
VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
if (pos.isNotNull()) {
newSelection = VisibleSelection(pos);
newSelection.expandUsingGranularity(WordGranularity);
}
if (appendTrailingWhitespace == ShouldAppendTrailingWhitespace && newSelection.isRange())
newSelection.appendTrailingWhitespace();
updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity);
}
}
void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)
{
if (m_mouseDownMayStartSelect) {
selectClosestWordFromHitTestResult(result.hitTestResult(),
(result.event().clickCount() == 2 && m_frame->editor().isSelectTrailingWhitespaceEnabled()) ? ShouldAppendTrailingWhitespace : DontAppendTrailingWhitespace);
}
}
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().deprecatedNode()->isDescendantOf(URLElement))
newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement);
updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity);
}
}
bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)
{
if (event.event().button() != LeftButton)
return false;
if (m_frame->selection()->isRange())
m_selectionInitiationState = ExtendedSelection;
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);
}
return updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), ParagraphGranularity);
}
static int textDistance(const Position& start, const Position& end)
{
RefPtr<Range> range = Range::create(start.anchorNode()->document(), start, end);
return TextIterator::rangeLength(range.get(), true);
}
bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)
{
m_frame->document()->updateLayoutIgnorePendingStylesheets();
Node* innerNode = event.targetNode();
if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
return false;
bool extendSelection = event.event().shiftKey() && !event.isOverLink();
if (FrameView* view = m_frame->view()) {
LayoutPoint vPoint = view->windowToContents(event.event().position());
if (!extendSelection && m_frame->selection()->contains(vPoint)) {
m_mouseDownWasSingleClickInSelection = true;
return false;
}
}
VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint()));
if (visiblePos.isNull())
visiblePos = VisiblePosition(firstPositionInOrBeforeNode(innerNode), DOWNSTREAM);
Position pos = visiblePos.deepEquivalent();
VisibleSelection newSelection = m_frame->selection()->selection();
TextGranularity granularity = CharacterGranularity;
if (extendSelection && newSelection.isCaretOrRange()) {
VisibleSelection selectionInUserSelectAll = expandSelectionToRespectUserSelectAll(innerNode, VisibleSelection(pos));
if (selectionInUserSelectAll.isRange()) {
if (comparePositions(selectionInUserSelectAll.start(), newSelection.start()) < 0)
pos = selectionInUserSelectAll.start();
else if (comparePositions(newSelection.end(), selectionInUserSelectAll.end()) < 0)
pos = selectionInUserSelectAll.end();
}
if (!m_frame->editor().behavior().shouldConsiderSelectionAsDirectional() && pos.isNotNull()) {
Position start = newSelection.start();
Position end = newSelection.end();
int distanceToStart = textDistance(start, pos);
int distanceToEnd = textDistance(pos, end);
if (distanceToStart <= distanceToEnd)
newSelection = VisibleSelection(end, pos);
else
newSelection = VisibleSelection(start, pos);
} else
newSelection.setExtent(pos);
if (m_frame->selection()->granularity() != CharacterGranularity) {
granularity = m_frame->selection()->granularity();
newSelection.expandUsingGranularity(m_frame->selection()->granularity());
}
} else
newSelection = expandSelectionToRespectUserSelectAll(innerNode, visiblePos);
bool handled = updateSelectionForMouseDownDispatchingSelectStart(innerNode, newSelection, granularity);
if (event.event().button() == MiddleButton) {
handled = handlePasteGlobalSelection(event.event()) || handled;
}
return handled;
}
static inline bool canMouseDownStartSelect(Node* node)
{
if (!node || !node->renderer())
return true;
return node->canStartSelection() || Position::nodeIsUserSelectAll(node);
}
bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)
{
#if ENABLE(DRAG_SUPPORT)
dragState().source = 0;
#endif
cancelFakeMouseMoveEvent();
m_frame->document()->updateLayoutIgnorePendingStylesheets();
if (ScrollView* scrollView = m_frame->view()) {
if (scrollView->isPointInScrollbarCorner(event.event().position()))
return false;
}
bool singleClick = event.event().clickCount() <= 1;
m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode()) && !event.scrollbar();
#if ENABLE(DRAG_SUPPORT)
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()
&& toSVGDocument(m_frame->document())->zoomAndPanEnabled()) {
if (event.event().shiftKey() && singleClick) {
m_svgPan = true;
toSVGDocument(m_frame->document())->startPan(m_frame->view()->windowToContents(event.event().position()));
return true;
}
}
#endif
if (singleClick)
focusDocumentView();
Node* innerNode = event.targetNode();
m_mousePressNode = innerNode;
#if ENABLE(DRAG_SUPPORT)
m_dragStartPos = event.event().position();
#endif
bool swallowEvent = false;
m_mousePressed = true;
m_selectionInitiationState = HaveNotStartedSelection;
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());
return swallowEvent;
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event)
{
if (!m_mousePressed)
return false;
if (handleDrag(event, ShouldCheckDragHysteresis))
return true;
Node* targetNode = event.targetNode();
if (event.event().button() != LeftButton || !targetNode)
return false;
RenderObject* renderer = targetNode->renderer();
if (!renderer) {
Node* parent = EventPathWalker::parent(targetNode);
if (!parent)
return false;
renderer = parent->renderer();
if (!renderer || !renderer->isListBox())
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 && !panScrollInProgress()) {
m_autoscrollController->startAutoscrollForSelection(renderer);
m_mouseDownMayStartAutoscroll = false;
}
if (m_selectionInitiationState != ExtendedSelection) {
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::DisallowShadowContent);
HitTestResult result(m_mouseDownPos);
m_frame->document()->renderView()->hitTest(request, result);
updateSelectionForMouseDrag(result);
}
updateSelectionForMouseDrag(event.hitTestResult());
return true;
}
bool EventHandler::eventMayStartDrag(const PlatformMouseEvent& event) const
{
if (!m_frame->contentRenderer() || !m_frame->contentRenderer()->hasLayer())
return false;
if (event.button() != LeftButton || event.clickCount() != 1)
return false;
FrameView* view = m_frame->view();
if (!view)
return false;
Page* page = m_frame->page();
if (!page)
return false;
updateDragSourceActionsAllowed();
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::DisallowShadowContent);
HitTestResult result(view->windowToContents(event.position()));
m_frame->contentRenderer()->hitTest(request, result);
DragState state;
return result.innerElement() && page->dragController()->draggableElement(m_frame, result.innerElement(), result.roundedPointInInnerNodeFrame(), state);
}
void EventHandler::updateSelectionForMouseDrag()
{
FrameView* view = m_frame->view();
if (!view)
return;
RenderView* renderer = m_frame->contentRenderer();
if (!renderer)
return;
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::Move | HitTestRequest::DisallowShadowContent);
HitTestResult result(view->windowToContents(m_lastKnownMousePosition));
renderer->hitTest(request, result);
updateSelectionForMouseDrag(result);
}
static VisiblePosition selectionExtentRespectingEditingBoundary(const VisibleSelection& selection, const LayoutPoint& localPoint, Node* targetNode)
{
LayoutPoint selectionEndPoint = localPoint;
Element* editableElement = selection.rootEditableElement();
if (!targetNode->renderer())
return VisiblePosition();
if (editableElement && !editableElement->contains(targetNode)) {
if (!editableElement->renderer())
return VisiblePosition();
FloatPoint absolutePoint = targetNode->renderer()->localToAbsolute(FloatPoint(selectionEndPoint));
selectionEndPoint = roundedLayoutPoint(editableElement->renderer()->absoluteToLocal(absolutePoint));
targetNode = editableElement;
}
return targetNode->renderer()->positionForPoint(selectionEndPoint);
}
void EventHandler::updateSelectionForMouseDrag(const HitTestResult& hitTestResult)
{
if (!m_mouseDownMayStartSelect)
return;
Node* target = hitTestResult.targetNode();
if (!target)
return;
VisiblePosition targetPosition = selectionExtentRespectingEditingBoundary(m_frame->selection()->selection(), hitTestResult.localPoint(), target);
if (targetPosition.isNull())
return;
VisibleSelection newSelection = m_frame->selection()->selection();
#if ENABLE(SVG)
if (Node* selectionBaseNode = newSelection.base().deprecatedNode())
if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer())
if (selectionBaseRenderer->isSVGText())
if (target->renderer()->containingBlock() != selectionBaseRenderer->containingBlock())
return;
#endif
if (m_selectionInitiationState == HaveNotStartedSelection && !dispatchSelectStart(target))
return;
if (m_selectionInitiationState != ExtendedSelection) {
m_selectionInitiationState = ExtendedSelection;
newSelection = VisibleSelection(targetPosition);
}
#if ENABLE(USERSELECT_ALL)
Node* rootUserSelectAllForMousePressNode = Position::rootUserSelectAllForNode(m_mousePressNode.get());
if (rootUserSelectAllForMousePressNode && rootUserSelectAllForMousePressNode == Position::rootUserSelectAllForNode(target)) {
newSelection.setBase(positionBeforeNode(rootUserSelectAllForMousePressNode).upstream(CanCrossEditingBoundary));
newSelection.setExtent(positionAfterNode(rootUserSelectAllForMousePressNode).downstream(CanCrossEditingBoundary));
} else {
if (rootUserSelectAllForMousePressNode && comparePositions(target->renderer()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0)
newSelection.setBase(positionAfterNode(rootUserSelectAllForMousePressNode).downstream(CanCrossEditingBoundary));
Node* rootUserSelectAllForTarget = Position::rootUserSelectAllForNode(target);
if (rootUserSelectAllForTarget && m_mousePressNode->renderer() && comparePositions(target->renderer()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0)
newSelection.setExtent(positionBeforeNode(rootUserSelectAllForTarget).upstream(CanCrossEditingBoundary));
else if (rootUserSelectAllForTarget && m_mousePressNode->renderer())
newSelection.setExtent(positionAfterNode(rootUserSelectAllForTarget).downstream(CanCrossEditingBoundary));
else
newSelection.setExtent(targetPosition);
}
#else
newSelection.setExtent(targetPosition);
#endif
if (m_frame->selection()->granularity() != CharacterGranularity)
newSelection.expandUsingGranularity(m_frame->selection()->granularity());
m_frame->selection()->setNonDirectionalSelectionIfNeeded(newSelection, m_frame->selection()->granularity(),
FrameSelection::AdjustEndpointsAtBidiBoundary);
}
#endif // ENABLE(DRAG_SUPPORT)
void EventHandler::lostMouseCapture()
{
m_frame->selection()->setCaretBlinkingSuspended(false);
}
bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event)
{
if (eventLoopHandleMouseUp(event))
return true;
return eventActivatedView(event.event());
}
bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event)
{
if (autoscrollInProgress())
stopAutoscrollTimer();
if (handleMouseUp(event))
return true;
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;
if (m_mouseDownWasSingleClickInSelection && m_selectionInitiationState != ExtendedSelection
#if ENABLE(DRAG_SUPPORT)
&& m_dragStartPos == event.event().position()
#endif
&& m_frame->selection()->isRange()
&& event.event().button() != RightButton) {
VisibleSelection newSelection;
Node* node = event.targetNode();
bool caretBrowsing = m_frame->settings() && m_frame->settings()->caretBrowsingEnabled();
if (node && (caretBrowsing || node->rendererIsEditable()) && node->renderer()) {
VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint());
newSelection = VisibleSelection(pos);
}
setSelectionIfNeeded(m_frame->selection(), newSelection);
handled = true;
}
m_frame->selection()->notifyRendererOfSelectionChange(UserTriggered);
m_frame->selection()->selectFrameElementInParentIfFullySelected();
if (event.event().button() == MiddleButton) {
handled = handlePasteGlobalSelection(event.event()) || handled;
}
return handled;
}
#if ENABLE(PAN_SCROLLING)
void EventHandler::didPanScrollStart()
{
m_autoscrollController->didPanScrollStart();
}
void EventHandler::didPanScrollStop()
{
m_autoscrollController->didPanScrollStop();
}
void EventHandler::startPanScrolling(RenderObject* renderer)
{
if (!renderer->isBox())
return;
m_autoscrollController->startPanScrolling(toRenderBox(renderer), lastKnownMousePosition());
invalidateClick();
}
#endif // ENABLE(PAN_SCROLLING)
RenderObject* EventHandler::autoscrollRenderer() const
{
return m_autoscrollController->autoscrollRenderer();
}
void EventHandler::updateAutoscrollRenderer()
{
m_autoscrollController->updateAutoscrollRenderer();
}
bool EventHandler::autoscrollInProgress() const
{
return m_autoscrollController->autoscrollInProgress();
}
bool EventHandler::panScrollInProgress() const
{
return m_autoscrollController->panScrollInProgress();
}
#if ENABLE(DRAG_SUPPORT)
DragSourceAction EventHandler::updateDragSourceActionsAllowed() const
{
if (!m_frame)
return DragSourceActionNone;
Page* page = m_frame->page();
if (!page)
return DragSourceActionNone;
FrameView* view = m_frame->view();
if (!view)
return DragSourceActionNone;
return page->dragController()->delegateDragSourceAction(view->contentsToRootView(m_mouseDownPos));
}
#endif // ENABLE(DRAG_SUPPORT)
HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType, const LayoutSize& padding)
{
if (Page* page = m_frame->page()) {
Frame* mainFrame = page->mainFrame();
if (m_frame != mainFrame) {
FrameView* frameView = m_frame->view();
FrameView* mainView = mainFrame->view();
if (frameView && mainView) {
IntPoint mainFramePoint = mainView->rootViewToContents(frameView->contentsToRootView(roundedIntPoint(point)));
return mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, hitType, padding);
}
}
}
HitTestResult result(point, padding.height(), padding.width(), padding.height(), padding.width());
if (!m_frame->contentRenderer())
return result;
HitTestRequest request(hitType | HitTestRequest::AllowChildFrameContent);
m_frame->contentRenderer()->hitTest(request, result);
if (!request.readOnly())
m_frame->document()->updateHoverActiveState(request, result.innerElement());
if (request.disallowsShadowContent())
result.setToNonShadowAncestor();
return result;
}
void EventHandler::stopAutoscrollTimer(bool rendererIsBeingDestroyed)
{
m_autoscrollController->stopAutoscrollTimer(rendererIsBeingDestroyed);
}
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()->focusedElement();
if (!node)
node = m_mousePressNode.get();
if (node) {
RenderObject* r = node->renderer();
if (r && !r->isListBox() && r->enclosingBox()->scroll(direction, granularity)) {
setFrameWasScrolledByUser();
return true;
}
}
return false;
}
bool EventHandler::logicalScrollOverflow(ScrollLogicalDirection direction, ScrollGranularity granularity, Node* startingNode)
{
Node* node = startingNode;
if (!node)
node = m_frame->document()->focusedElement();
if (!node)
node = m_mousePressNode.get();
if (node) {
RenderObject* r = node->renderer();
if (r && !r->isListBox() && r->enclosingBox()->logicalScroll(direction, granularity)) {
setFrameWasScrolledByUser();
return true;
}
}
return false;
}
bool EventHandler::scrollRecursively(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode)
{
m_frame->document()->updateLayoutIgnorePendingStylesheets();
if (scrollOverflow(direction, granularity, startingNode))
return true;
Frame* frame = m_frame;
FrameView* view = frame->view();
if (view && view->scroll(direction, granularity))
return true;
frame = frame->tree()->parent();
if (!frame)
return false;
return frame->eventHandler()->scrollRecursively(direction, granularity, m_frame->ownerElement());
}
bool EventHandler::logicalScrollRecursively(ScrollLogicalDirection direction, ScrollGranularity granularity, Node* startingNode)
{
m_frame->document()->updateLayoutIgnorePendingStylesheets();
if (logicalScrollOverflow(direction, granularity, startingNode))
return true;
Frame* frame = m_frame;
FrameView* view = frame->view();
bool scrolled = false;
#if PLATFORM(MAC)
if (granularity == ScrollByDocument && view && view->logicalScroll(ScrollInlineDirectionBackward, ScrollByDocument))
scrolled = true;
#endif
if (view && view->logicalScroll(direction, granularity))
scrolled = true;
if (scrolled)
return true;
frame = frame->tree()->parent();
if (!frame)
return false;
return frame->eventHandler()->logicalScrollRecursively(direction, granularity, m_frame->ownerElement());
}
IntPoint EventHandler::lastKnownMousePosition() const
{
return m_lastKnownMousePosition;
}
Frame* EventHandler::subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)
{
if (!hitTestResult.isOverWidget())
return 0;
return 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 toFrameView(widget)->frame();
}
static bool isSubmitImage(Node* node)
{
return node && node->hasTagName(inputTag) && static_cast<HTMLInputElement*>(node)->isImageButton();
}
static bool nodeIsNotBeingEdited(Node* node, Frame* frame)
{
return frame->selection()->rootEditableElement() != node->rootEditableElement();
}
bool EventHandler::useHandCursor(Node* node, bool isOverLink, bool shiftKey)
{
if (!node)
return false;
bool editable = node->rendererIsEditable();
bool editableLinkEnabled = false;
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) || shiftKey;
break;
case EditableLinkOnlyLiveWithShiftKey:
editableLinkEnabled = shiftKey;
break;
}
}
return ((isOverLink || isSubmitImage(node)) && (!editable || editableLinkEnabled));
}
void EventHandler::cursorUpdateTimerFired(Timer<EventHandler>*)
{
ASSERT(m_frame);
ASSERT(m_frame->document());
updateCursor();
}
void EventHandler::updateCursor()
{
if (m_mousePositionIsUnknown)
return;
FrameView* view = m_frame->view();
if (!view)
return;
RenderView* renderView = view->renderView();
if (!renderView)
return;
if (!view->shouldSetCursor())
return;
bool shiftKey;
bool ctrlKey;
bool altKey;
bool metaKey;
PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey);
m_frame->document()->updateLayout();
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(view->windowToContents(m_lastKnownMousePosition));
renderView->hitTest(request, result);
OptionalCursor optionalCursor = selectCursor(result, shiftKey);
if (optionalCursor.isCursorChange()) {
m_currentMouseCursor = optionalCursor.cursor();
view->setCursor(m_currentMouseCursor);
}
}
OptionalCursor EventHandler::selectCursor(const HitTestResult& result, bool shiftKey)
{
if (m_resizeLayer && m_resizeLayer->inResizeMode())
return NoCursorChange;
Page* page = m_frame->page();
if (!page)
return NoCursorChange;
#if ENABLE(PAN_SCROLLING)
if (page->mainFrame()->eventHandler()->panScrollInProgress())
return NoCursorChange;
#endif
Node* node = result.targetNode();
if (!node)
return NoCursorChange;
RenderObject* renderer = node->renderer();
RenderStyle* style = renderer ? renderer->style() : 0;
bool horizontalText = !style || style->isHorizontalWritingMode();
const Cursor& iBeam = horizontalText ? iBeamCursor() : verticalTextCursor();
#if ENABLE(CURSOR_VISIBILITY)
if (style && style->cursorVisibility() == CursorVisibilityAutoHide) {
FeatureObserver::observe(m_frame->document(), FeatureObserver::CursorVisibility);
startAutoHideCursorTimer();
} else
cancelAutoHideCursorTimer();
#endif
if (m_mousePressed && m_mouseDownMayStartSelect
#if ENABLE(DRAG_SUPPORT)
&& !m_mouseDownMayStartDrag
#endif
&& m_frame->selection()->isCaretOrRange() && !m_capturingMouseEventsNode)
return iBeam;
if (renderer) {
Cursor overrideCursor;
switch (renderer->getCursor(roundedIntPoint(result.localPoint()), overrideCursor)) {
case SetCursorBasedOnStyle:
break;
case SetCursor:
return overrideCursor;
case DoNotSetCursor:
return NoCursorChange;
}
}
if (style && style->cursors()) {
const CursorList* cursors = style->cursors();
for (unsigned i = 0; i < cursors->size(); ++i) {
StyleImage* styleImage = (*cursors)[i].image();
if (!styleImage)
continue;
CachedImage* cachedImage = styleImage->cachedImage();
if (!cachedImage)
continue;
float scale = styleImage->imageScaleFactor();
IntPoint hotSpot = (*cursors)[i].hotSpot();
hotSpot.scale(scale, scale);
IntSize size = cachedImage->imageForRenderer(renderer)->size();
if (cachedImage->errorOccurred())
continue;
size.scale(1 / scale);
if (size.width() > maximumCursorSize || size.height() > maximumCursorSize)
continue;
Image* image = cachedImage->imageForRenderer(renderer);
#if ENABLE(MOUSE_CURSOR_SCALE)
if (scale < minimumCursorScale)
continue;
return Cursor(image, hotSpot, scale);
#else
ASSERT(scale == 1);
return Cursor(image, hotSpot);
#endif // ENABLE(MOUSE_CURSOR_SCALE)
}
}
switch (style ? style->cursor() : CURSOR_AUTO) {
case CURSOR_AUTO: {
bool editable = node->rendererIsEditable();
if (useHandCursor(node, result.isOverLink(), shiftKey))
return handCursor();
bool inResizer = false;
if (renderer) {
if (RenderLayer* layer = renderer->enclosingLayer()) {
if (FrameView* view = m_frame->view())
inResizer = layer->isPointInResizeControl(view->windowToContents(roundedIntPoint(result.localPoint())));
}
}
if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !result.scrollbar())
return iBeam;
return pointerCursor();
}
case CURSOR_CROSS:
return crossCursor();
case CURSOR_POINTER:
return handCursor();
case CURSOR_MOVE:
return moveCursor();
case CURSOR_ALL_SCROLL:
return moveCursor();
case CURSOR_E_RESIZE:
return eastResizeCursor();
case CURSOR_W_RESIZE:
return westResizeCursor();
case CURSOR_N_RESIZE:
return northResizeCursor();
case CURSOR_S_RESIZE:
return southResizeCursor();
case CURSOR_NE_RESIZE:
return northEastResizeCursor();
case CURSOR_SW_RESIZE:
return southWestResizeCursor();
case CURSOR_NW_RESIZE:
return northWestResizeCursor();
case CURSOR_SE_RESIZE:
return southEastResizeCursor();
case CURSOR_NS_RESIZE:
return northSouthResizeCursor();
case CURSOR_EW_RESIZE:
return eastWestResizeCursor();
case CURSOR_NESW_RESIZE:
return northEastSouthWestResizeCursor();
case CURSOR_NWSE_RESIZE:
return northWestSouthEastResizeCursor();
case CURSOR_COL_RESIZE:
return columnResizeCursor();
case CURSOR_ROW_RESIZE:
return rowResizeCursor();
case CURSOR_TEXT:
return iBeamCursor();
case CURSOR_WAIT:
return waitCursor();
case CURSOR_HELP:
return helpCursor();
case CURSOR_VERTICAL_TEXT:
return verticalTextCursor();
case CURSOR_CELL:
return cellCursor();
case CURSOR_CONTEXT_MENU:
return contextMenuCursor();
case CURSOR_PROGRESS:
return progressCursor();
case CURSOR_NO_DROP:
return noDropCursor();
case CURSOR_ALIAS:
return aliasCursor();
case CURSOR_COPY:
return copyCursor();
case CURSOR_NONE:
return noneCursor();
case CURSOR_NOT_ALLOWED:
return notAllowedCursor();
case CURSOR_DEFAULT:
return pointerCursor();
case CURSOR_WEBKIT_ZOOM_IN:
return zoomInCursor();
case CURSOR_WEBKIT_ZOOM_OUT:
return zoomOutCursor();
case CURSOR_WEBKIT_GRAB:
return grabCursor();
case CURSOR_WEBKIT_GRABBING:
return grabbingCursor();
}
return pointerCursor();
}
#if ENABLE(CURSOR_VISIBILITY)
void EventHandler::startAutoHideCursorTimer()
{
Page* page = m_frame->page();
if (!page)
return;
m_autoHideCursorTimer.startOneShot(page->settings()->timeWithoutMouseMovementBeforeHidingControls());
if (m_fakeMouseMoveEventTimer.isActive())
m_fakeMouseMoveEventTimer.stop();
}
void EventHandler::cancelAutoHideCursorTimer()
{
if (m_autoHideCursorTimer.isActive())
m_autoHideCursorTimer.stop();
}
void EventHandler::autoHideCursorTimerFired(Timer<EventHandler>* timer)
{
ASSERT_UNUSED(timer, timer == &m_autoHideCursorTimer);
m_currentMouseCursor = noneCursor();
FrameView* view = m_frame->view();
if (view && view->isActive())
view->setCursor(m_currentMouseCursor);
}
#endif
static LayoutPoint documentPointForWindowPoint(Frame* frame, const IntPoint& windowPoint)
{
FrameView* view = frame->view();
return view ? view->windowToContents(windowPoint) : windowPoint;
}
bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
if (InspectorInstrumentation::handleMousePress(m_frame->page())) {
invalidateClick();
return true;
}
#if ENABLE(TOUCH_EVENTS)
bool defaultPrevented = dispatchSyntheticTouchEventIfEnabled(mouseEvent);
if (defaultPrevented)
return true;
#endif
UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
m_lastMouseDownUserGestureToken = gestureIndicator.currentToken();
m_frame->loader()->resetMultipleFormSubmissionProtection();
cancelFakeMouseMoveEvent();
m_mousePressed = true;
m_capturesDragging = true;
setLastKnownMousePosition(mouseEvent);
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.position());
else {
invalidateClick();
return false;
}
m_mouseDownWasInSubframe = false;
HitTestRequest request(HitTestRequest::Active | HitTestRequest::DisallowShadowContent);
LayoutPoint documentPoint = documentPointForWindowPoint(m_frame, mouseEvent.position());
MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
if (!mev.targetNode()) {
invalidateClick();
return false;
}
m_mousePressNode = mev.targetNode();
RefPtr<Frame> subframe = subframeForHitTestResult(mev);
if (subframe && passMousePressEventToSubframe(mev, subframe.get())) {
m_capturesDragging = subframe->eventHandler()->capturesDragging();
if (m_mousePressed && m_capturesDragging) {
m_capturingMouseEventsNode = mev.targetNode();
m_eventHandlerWillResetCapturingMouseEventsNode = true;
}
invalidateClick();
return true;
}
#if ENABLE(PAN_SCROLLING)
bool isPanScrollInProgress = m_frame->page() && m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress();
stopAutoscrollTimer();
if (isPanScrollInProgress) {
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.position());
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 || mev.scrollbar();
if (mev.scrollbar()) {
const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get();
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::DisallowShadowContent);
mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())
m_lastScrollbarUnderMouse = 0;
}
if (swallowEvent) {
Scrollbar* scrollbar = mev.scrollbar();
updateLastScrollbarUnderMouse(scrollbar, true);
if (scrollbar)
passMousePressEventToScrollbar(mev, scrollbar);
} else {
if (mev.targetNode()->isShadowRoot() && toShadowRoot(mev.targetNode())->host()->hasTagName(inputTag)) {
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::DisallowShadowContent);
mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
}
FrameView* view = m_frame->view();
Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mouseEvent.position()) : 0;
if (!scrollbar)
scrollbar = mev.scrollbar();
updateLastScrollbarUnderMouse(scrollbar, true);
if (scrollbar && passMousePressEventToScrollbar(mev, scrollbar))
swallowEvent = true;
else
swallowEvent = handleMousePressEvent(mev);
}
return swallowEvent;
}
bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
m_frame->selection()->setCaretBlinkingSuspended(false);
UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
m_mousePressed = false;
setLastKnownMousePosition(mouseEvent);
HitTestRequest request(HitTestRequest::Active | HitTestRequest::DisallowShadowContent);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
Frame* subframe = subframeForHitTestResult(mev);
if (m_eventHandlerWillResetCapturingMouseEventsNode)
m_capturingMouseEventsNode = 0;
if (subframe && passMousePressEventToSubframe(mev, subframe))
return true;
m_clickCount = mouseEvent.clickCount();
bool swallowMouseUpEvent = !dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
bool swallowClickEvent = mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode && !dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
if (m_lastScrollbarUnderMouse)
swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp(mouseEvent);
bool swallowMouseReleaseEvent = !swallowMouseUpEvent && handleMouseReleaseEvent(mev);
invalidateClick();
return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;
}
static RenderLayer* layerForNode(Node* node)
{
if (!node)
return 0;
RenderObject* renderer = node->renderer();
if (!renderer)
return 0;
RenderLayer* layer = renderer->enclosingLayer();
if (!layer)
return 0;
return layer;
}
bool EventHandler::mouseMoved(const PlatformMouseEvent& event)
{
RefPtr<FrameView> protector(m_frame->view());
MaximumDurationTracker maxDurationTracker(&m_maxMouseMovedDuration);
HitTestResult hoveredNode = HitTestResult(LayoutPoint());
bool result = handleMouseMoveEvent(event, &hoveredNode);
Page* page = m_frame->page();
if (!page)
return result;
if (RenderLayer* layer = layerForNode(hoveredNode.innerNode())) {
if (FrameView* frameView = m_frame->view()) {
if (frameView->containsScrollableArea(layer))
layer->mouseMovedInContentArea();
}
}
if (FrameView* frameView = m_frame->view())
frameView->mouseMovedInContentArea();
hoveredNode.setToNonShadowAncestor();
page->chrome().mouseDidMoveOverElement(hoveredNode, event.modifierFlags());
page->chrome().setToolTip(hoveredNode);
return result;
}
bool EventHandler::passMouseMovedEventToScrollbars(const PlatformMouseEvent& event)
{
HitTestResult hoveredNode;
return handleMouseMoveEvent(event, &hoveredNode, true);
}
bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode, bool onlyUpdateScrollbars)
{
ASSERT(m_frame);
if (!m_frame)
return false;
#if ENABLE(TOUCH_EVENTS)
bool defaultPrevented = dispatchSyntheticTouchEventIfEnabled(mouseEvent);
if (defaultPrevented)
return true;
#endif
RefPtr<FrameView> protector(m_frame->view());
setLastKnownMousePosition(mouseEvent);
if (m_hoverTimer.isActive())
m_hoverTimer.stop();
m_cursorUpdateTimer.stop();
cancelFakeMouseMoveEvent();
#if ENABLE(SVG)
if (m_svgPan) {
toSVGDocument(m_frame->document())->updatePan(m_frame->view()->windowToContents(m_lastKnownMousePosition));
return true;
}
#endif
if (m_frameSetBeingResized)
return !dispatchMouseEvent(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false);
if (m_lastScrollbarUnderMouse && m_mousePressed)
return m_lastScrollbarUnderMouse->mouseMoved(mouseEvent);
HitTestRequest::HitTestRequestType hitType = HitTestRequest::Move | HitTestRequest::DisallowShadowContent | HitTestRequest::AllowFrameScrollbars;
if (m_mousePressed)
hitType |= HitTestRequest::Active;
else if (onlyUpdateScrollbars) {
hitType |= HitTestRequest::ReadOnly;
}
#if ENABLE(TOUCH_EVENTS)
if (m_touchPressed)
hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly;
#endif
HitTestRequest request(hitType);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
if (hoveredNode)
*hoveredNode = mev.hitTestResult();
if (m_resizeLayer && m_resizeLayer->inResizeMode())
m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner);
else {
Scrollbar* scrollbar = mev.scrollbar();
updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed);
if (!m_mousePressed && scrollbar)
scrollbar->mouseMoved(mouseEvent); if (onlyUpdateScrollbars)
return true;
}
bool swallowEvent = false;
RefPtr<Frame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)
passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get());
if (newSubframe) {
updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true);
if (newSubframe->view())
swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);
} else {
if (FrameView* view = m_frame->view()) {
OptionalCursor optionalCursor = selectCursor(mev.hitTestResult(), mouseEvent.shiftKey());
if (optionalCursor.isCursorChange()) {
m_currentMouseCursor = optionalCursor.cursor();
view->setCursor(m_currentMouseCursor);
}
}
}
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;
}
inline static bool mouseIsReleasedOnPressedElement(Node* targetNode, Node* clickNode)
{
if (targetNode == clickNode)
return true;
if (!targetNode)
return false;
ShadowRoot* containingShadowRoot = targetNode->containingShadowRoot();
if (!containingShadowRoot)
return false;
if (containingShadowRoot->type() != ShadowRoot::UserAgentShadowRoot)
return false;
Node* adjustedTargetNode = targetNode->shadowHost();
Node* adjustedClickNode = clickNode ? clickNode->shadowHost() : 0;
return adjustedTargetNode == adjustedClickNode;
}
bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
m_frame->selection()->setCaretBlinkingSuspended(false);
#if ENABLE(TOUCH_EVENTS)
bool defaultPrevented = dispatchSyntheticTouchEventIfEnabled(mouseEvent);
if (defaultPrevented)
return true;
#endif
OwnPtr<UserGestureIndicator> gestureIndicator;
if (m_lastMouseDownUserGestureToken)
gestureIndicator = adoptPtr(new UserGestureIndicator(m_lastMouseDownUserGestureToken.release()));
else
gestureIndicator = adoptPtr(new UserGestureIndicator(DefinitelyProcessingUserGesture));
#if ENABLE(PAN_SCROLLING)
m_autoscrollController->handleMouseReleaseEvent(mouseEvent);
#endif
m_mousePressed = false;
setLastKnownMousePosition(mouseEvent);
#if ENABLE(SVG)
if (m_svgPan) {
m_svgPan = false;
toSVGDocument(m_frame->document())->updatePan(m_frame->view()->windowToContents(m_lastKnownMousePosition));
return true;
}
#endif
if (m_frameSetBeingResized)
return !dispatchMouseEvent(eventNames().mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false);
if (m_lastScrollbarUnderMouse) {
invalidateClick();
m_lastScrollbarUnderMouse->mouseUp(mouseEvent);
bool cancelable = true;
bool setUnder = false;
return !dispatchMouseEvent(eventNames().mouseupEvent, m_lastNodeUnderMouse.get(), cancelable, m_clickCount, mouseEvent, setUnder);
}
HitTestRequest request(HitTestRequest::Release | HitTestRequest::DisallowShadowContent);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
if (m_eventHandlerWillResetCapturingMouseEventsNode)
m_capturingMouseEventsNode = 0;
if (subframe && passMouseReleaseEventToSubframe(mev, subframe))
return true;
bool swallowMouseUpEvent = !dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
bool contextMenuEvent = mouseEvent.button() == RightButton;
bool swallowClickEvent = m_clickCount > 0 && !contextMenuEvent && mouseIsReleasedOnPressedElement(mev.targetNode(), m_clickNode.get()) && !dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
if (m_resizeLayer) {
m_resizeLayer->setInResizeMode(false);
m_resizeLayer = 0;
}
bool swallowMouseReleaseEvent = false;
if (!swallowMouseUpEvent)
swallowMouseReleaseEvent = handleMouseReleaseEvent(mev);
invalidateClick();
return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;
}
bool EventHandler::handlePasteGlobalSelection(const PlatformMouseEvent& mouseEvent)
{
#if PLATFORM(GTK)
if (mouseEvent.type() != PlatformEvent::MousePressed)
return false;
#else
if (mouseEvent.type() != PlatformEvent::MouseReleased)
return false;
#endif
if (!m_frame->page())
return false;
Frame* focusFrame = m_frame->page()->focusController()->focusedOrMainFrame();
if (m_frame == focusFrame && m_frame->editor().client()->supportsGlobalSelection())
return m_frame->editor().command(ASCIILiteral("PasteGlobalSelection")).execute();
return false;
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard)
{
FrameView* view = m_frame->view();
if (!view)
return false;
view->resetDeferredRepaintDelay();
RefPtr<MouseEvent> me = MouseEvent::create(eventType,
true, true, m_frame->document()->defaultView(),
0, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),
#if ENABLE(POINTER_LOCK)
event.movementDelta().x(), event.movementDelta().y(),
#endif
event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
0, 0, clipboard);
dragTarget->dispatchEvent(me.get(), IGNORE_EXCEPTION);
return me->defaultPrevented();
}
static bool targetIsFrame(Node* target, Frame*& frame)
{
if (!target)
return false;
if (!target->hasTagName(frameTag) && !target->hasTagName(iframeTag))
return false;
frame = static_cast<HTMLFrameElementBase*>(target)->contentFrame();
return true;
}
static bool findDropZone(Node* target, Clipboard* clipboard)
{
Element* element = target->isElementNode() ? toElement(target) : target->parentElement();
for (; element; element = element->parentElement()) {
bool matched = false;
String dropZoneStr = element->fastGetAttribute(webkitdropzoneAttr);
if (dropZoneStr.isEmpty())
continue;
dropZoneStr.makeLower();
SpaceSplitString keywords(dropZoneStr, false);
if (keywords.isNull())
continue;
DragOperation dragOperation = DragOperationNone;
for (unsigned int i = 0; i < keywords.size(); i++) {
DragOperation op = convertDropZoneOperationToDragOperation(keywords[i]);
if (op != DragOperationNone) {
if (dragOperation == DragOperationNone)
dragOperation = op;
} else
matched = matched || clipboard->hasDropZoneType(keywords[i].string());
if (matched && dragOperation != DragOperationNone)
break;
}
if (matched) {
clipboard->setDropEffect(convertDragOperationToDropZoneOperation(dragOperation));
return true;
}
}
return false;
}
bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
{
bool accept = false;
if (!m_frame->view())
return false;
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::DisallowShadowContent);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);
RefPtr<Node> newTarget = mev.targetNode();
if (newTarget && newTarget->isTextNode())
newTarget = EventPathWalker::parent(newTarget.get());
m_autoscrollController->updateDragAndDrop(newTarget.get(), event.position(), event.timestamp());
if (m_dragTarget != newTarget) {
Frame* targetFrame;
if (targetIsFrame(newTarget.get(), targetFrame)) {
if (targetFrame)
accept = targetFrame->eventHandler()->updateDragAndDrop(event, clipboard);
} else if (newTarget) {
if (dragState().source && dragState().shouldDispatchEvents) {
dispatchDragSrcEvent(eventNames().dragEvent, event);
}
accept = dispatchDragEvent(eventNames().dragenterEvent, newTarget.get(), event, clipboard);
if (!accept)
accept = findDropZone(newTarget.get(), clipboard);
}
if (targetIsFrame(m_dragTarget.get(), targetFrame)) {
if (targetFrame)
accept = targetFrame->eventHandler()->updateDragAndDrop(event, clipboard);
} else if (m_dragTarget)
dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
if (newTarget) {
m_shouldOnlyFireDragOverEvent = true;
}
} else {
Frame* targetFrame;
if (targetIsFrame(newTarget.get(), targetFrame)) {
if (targetFrame)
accept = targetFrame->eventHandler()->updateDragAndDrop(event, clipboard);
} else if (newTarget) {
if (!m_shouldOnlyFireDragOverEvent && dragState().source && dragState().shouldDispatchEvents) {
dispatchDragSrcEvent(eventNames().dragEvent, event);
}
accept = dispatchDragEvent(eventNames().dragoverEvent, newTarget.get(), event, clipboard);
if (!accept)
accept = findDropZone(newTarget.get(), clipboard);
m_shouldOnlyFireDragOverEvent = false;
}
}
m_dragTarget = newTarget;
return accept;
}
void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
{
Frame* targetFrame;
if (targetIsFrame(m_dragTarget.get(), targetFrame)) {
if (targetFrame)
targetFrame->eventHandler()->cancelDragAndDrop(event, clipboard);
} else if (m_dragTarget.get()) {
if (dragState().source && dragState().shouldDispatchEvents)
dispatchDragSrcEvent(eventNames().dragEvent, event);
dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
}
clearDragState();
}
bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
{
Frame* targetFrame;
bool preventedDefault = false;
if (targetIsFrame(m_dragTarget.get(), targetFrame)) {
if (targetFrame)
preventedDefault = targetFrame->eventHandler()->performDragAndDrop(event, clipboard);
} else if (m_dragTarget.get())
preventedDefault = dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard);
clearDragState();
return preventedDefault;
}
void EventHandler::clearDragState()
{
stopAutoscrollTimer();
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.position()), mev);
}
#if ENABLE(SVG)
static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)
{
if (!referenceNode || !referenceNode->isSVGElement())
return 0;
ShadowRoot* shadowRoot = referenceNode->containingShadowRoot();
if (!shadowRoot)
return 0;
Element* shadowTreeParentElement = shadowRoot->host();
if (!shadowTreeParentElement || !shadowTreeParentElement->hasTagName(useTag))
return 0;
return static_cast<SVGUseElement*>(shadowTreeParentElement)->instanceForShadowTreeElement(referenceNode);
}
#endif
void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut)
{
Node* result = targetNode;
if (m_capturingMouseEventsNode)
result = m_capturingMouseEventsNode.get();
else {
if (result && result->isTextNode())
result = EventPathWalker::parent(result);
}
m_nodeUnderMouse = result;
#if ENABLE(SVG)
m_instanceUnderMouse = instanceAssociatedWithShadowTreeElement(result);
if (m_lastInstanceUnderMouse) {
SVGElement* lastCorrespondingElement = m_lastInstanceUnderMouse->correspondingElement();
SVGElement* lastCorrespondingUseElement = m_lastInstanceUnderMouse->correspondingUseElement();
if (lastCorrespondingElement && lastCorrespondingUseElement) {
HashSet<SVGElementInstance*> instances = lastCorrespondingElement->instancesForElement();
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
if (fireMouseOverOut) {
RenderLayer* layerForLastNode = layerForNode(m_lastNodeUnderMouse.get());
RenderLayer* layerForNodeUnderMouse = layerForNode(m_nodeUnderMouse.get());
Page* page = m_frame->page();
if (m_lastNodeUnderMouse && (!m_nodeUnderMouse || m_nodeUnderMouse->document() != m_frame->document())) {
if (Frame* frame = m_lastNodeUnderMouse->document()->frame()) {
if (FrameView* frameView = frame->view())
frameView->mouseExitedContentArea();
}
} else if (page && (layerForLastNode && (!layerForNodeUnderMouse || layerForNodeUnderMouse != layerForLastNode))) {
if (Frame* frame = m_lastNodeUnderMouse->document()->frame()) {
if (FrameView* frameView = frame->view()) {
if (frameView->containsScrollableArea(layerForLastNode))
layerForLastNode->mouseExitedContentArea();
}
}
}
if (m_nodeUnderMouse && (!m_lastNodeUnderMouse || m_lastNodeUnderMouse->document() != m_frame->document())) {
if (Frame* frame = m_nodeUnderMouse->document()->frame()) {
if (FrameView* frameView = frame->view())
frameView->mouseEnteredContentArea();
}
} else if (page && (layerForNodeUnderMouse && (!layerForLastNode || layerForNodeUnderMouse != layerForLastNode))) {
if (Frame* frame = m_nodeUnderMouse->document()->frame()) {
if (FrameView* frameView = frame->view()) {
if (frameView->containsScrollableArea(layerForNodeUnderMouse))
layerForNodeUnderMouse->mouseEnteredContentArea();
}
}
}
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) {
if (m_lastNodeUnderMouse)
m_lastNodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoutEvent, 0, m_nodeUnderMouse.get());
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 , 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 (FrameView* view = m_frame->view()) {
if (view->scrollbarAtPoint(mouseEvent.position()))
return true;
}
m_frame->document()->updateLayoutIgnorePendingStylesheets();
Element* element;
if (m_nodeUnderMouse)
element = m_nodeUnderMouse->isElementNode() ? toElement(m_nodeUnderMouse.get()) : m_nodeUnderMouse->parentOrShadowHostElement();
else
element = 0;
while (element) {
if (element->isMouseFocusable()) {
if (m_frame->selection()->isRange()
&& m_frame->selection()->toNormalizedRange()->compareNode(element, IGNORE_EXCEPTION) == Range::NODE_INSIDE
&& element->isDescendantOf(m_frame->document()->focusedElement()))
return true;
break;
}
element = element->parentOrShadowHostElement();
}
if ((!element || !element->isMouseFocusable()) && isInsideScrollbar(mouseEvent.position()))
return false;
if (Page* page = m_frame->page()) {
if (element && element->isMouseFocusable()) {
if (!page->focusController()->setFocusedElement(element, m_frame))
swallowEvent = true;
} else if (!element || !element->focused()) {
if (!page->focusController()->setFocusedElement(0, m_frame))
swallowEvent = true;
}
}
}
return !swallowEvent;
}
bool EventHandler::isInsideScrollbar(const IntPoint& windowPoint) const
{
if (RenderView* renderView = m_frame->contentRenderer()) {
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::DisallowShadowContent);
HitTestResult result(windowPoint);
renderView->hitTest(request, result);
return result.scrollbar();
}
return false;
}
#if !PLATFORM(GTK)
bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult&, const PlatformWheelEvent&) const
{
return false;
}
#endif
void EventHandler::recordWheelEventDelta(const PlatformWheelEvent& event)
{
const size_t recentEventCount = 3;
m_recentWheelEventDeltas.append(FloatSize(event.deltaX(), event.deltaY()));
if (m_recentWheelEventDeltas.size() > recentEventCount)
m_recentWheelEventDeltas.removeFirst();
}
static bool deltaIsPredominantlyVertical(const FloatSize& delta)
{
return fabs(delta.height()) > fabs(delta.width());
}
EventHandler::DominantScrollGestureDirection EventHandler::dominantScrollGestureDirection() const
{
bool allVertical = m_recentWheelEventDeltas.size();
bool allHorizontal = m_recentWheelEventDeltas.size();
Deque<FloatSize>::const_iterator end = m_recentWheelEventDeltas.end();
for (Deque<FloatSize>::const_iterator it = m_recentWheelEventDeltas.begin(); it != end; ++it) {
bool isVertical = deltaIsPredominantlyVertical(*it);
allVertical &= isVertical;
allHorizontal &= !isVertical;
}
if (allVertical)
return DominantScrollDirectionVertical;
if (allHorizontal)
return DominantScrollDirectionHorizontal;
return DominantScrollDirectionNone;
}
bool EventHandler::handleWheelEvent(const 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;
m_isHandlingWheelEvent = true;
setFrameWasScrolledByUser();
LayoutPoint vPoint = view->windowToContents(e.position());
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::DisallowShadowContent);
HitTestResult result(vPoint);
doc->renderView()->hitTest(request, result);
bool useLatchedWheelEventNode = e.useLatchedEventNode();
Node* node = result.innerNode();
if (node && node->isTextNode())
node = EventPathWalker::parent(node);
bool isOverWidget;
if (useLatchedWheelEventNode) {
if (!m_latchedWheelEventNode) {
m_latchedWheelEventNode = node;
m_widgetIsLatched = result.isOverWidget();
} else
node = m_latchedWheelEventNode.get();
isOverWidget = m_widgetIsLatched;
} else {
if (m_latchedWheelEventNode)
m_latchedWheelEventNode = 0;
if (m_previousWheelScrolledNode)
m_previousWheelScrolledNode = 0;
isOverWidget = result.isOverWidget();
}
PlatformWheelEvent event = e;
if (m_baseEventType == PlatformEvent::NoType && shouldTurnVerticalTicksIntoHorizontal(result, e))
event = event.copyTurningVerticalTicksIntoHorizontalTicks();
#if PLATFORM(MAC)
switch (event.phase()) {
case PlatformWheelEventPhaseBegan:
m_recentWheelEventDeltas.clear();
m_inTrackingScrollGesturePhase = true;
break;
case PlatformWheelEventPhaseEnded:
m_inTrackingScrollGesturePhase = false;
break;
default:
break;
}
#endif
recordWheelEventDelta(event);
if (node) {
RenderObject* target = node->renderer();
if (isOverWidget && target && target->isWidget()) {
Widget* widget = toRenderWidget(target)->widget();
if (widget && passWheelEventToWidget(e, widget)) {
m_isHandlingWheelEvent = false;
return true;
}
}
if (node && !node->dispatchWheelEvent(event)) {
m_isHandlingWheelEvent = false;
return true;
}
}
view = m_frame->view();
bool didHandleEvent = view ? view->wheelEvent(event) : false;
m_isHandlingWheelEvent = false;
return didHandleEvent;
}
void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent)
{
if (!startNode || !wheelEvent)
return;
Node* stopNode = m_previousWheelScrolledNode.get();
ScrollGranularity granularity = wheelGranularityToScrollGranularity(wheelEvent->deltaMode());
DominantScrollGestureDirection dominantDirection = DominantScrollDirectionNone;
if (m_inTrackingScrollGesturePhase && applicationIsITunes())
dominantDirection = dominantScrollGestureDirection();
if (dominantDirection != DominantScrollDirectionVertical && scrollNode(wheelEvent->rawDeltaX(), granularity, ScrollLeft, ScrollRight, startNode, &stopNode))
wheelEvent->setDefaultHandled();
if (dominantDirection != DominantScrollDirectionHorizontal && scrollNode(wheelEvent->rawDeltaY(), granularity, ScrollUp, ScrollDown, startNode, &stopNode))
wheelEvent->setDefaultHandled();
if (!m_latchedWheelEventNode)
m_previousWheelScrolledNode = stopNode;
}
#if ENABLE(GESTURE_EVENTS)
bool EventHandler::handleGestureTapDown()
{
FrameView* view = m_frame->view();
if (!view)
return false;
if (ScrollAnimator* scrollAnimator = view->existingScrollAnimator())
scrollAnimator->cancelAnimations();
const FrameView::ScrollableAreaSet* areas = view->scrollableAreas();
if (!areas)
return false;
for (FrameView::ScrollableAreaSet::const_iterator it = areas->begin(); it != areas->end(); ++it) {
ScrollableArea* sa = *it;
ScrollAnimator* animator = sa->scrollAnimator();
if (animator)
animator->cancelAnimations();
}
return false;
}
bool EventHandler::handleGestureEvent(const PlatformGestureEvent& gestureEvent)
{
Node* eventTarget = 0;
Scrollbar* scrollbar = 0;
if (gestureEvent.type() == PlatformEvent::GestureScrollEnd
|| gestureEvent.type() == PlatformEvent::GestureScrollUpdate
|| gestureEvent.type() == PlatformEvent::GestureScrollUpdateWithoutPropagation) {
scrollbar = m_scrollbarHandlingScrollGesture.get();
eventTarget = m_scrollGestureHandlingNode.get();
}
IntPoint adjustedPoint = gestureEvent.position();
HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent;
if (gestureEvent.type() == PlatformEvent::GestureTapDown) {
#if ENABLE(TOUCH_ADJUSTMENT)
adjustGesturePosition(gestureEvent, adjustedPoint);
#endif
hitType |= HitTestRequest::Active;
} else if (gestureEvent.type() == PlatformEvent::GestureTapDownCancel)
hitType |= HitTestRequest::Release;
else if (gestureEvent.type() == PlatformEvent::GestureTap) {
hitType |= HitTestRequest::ReadOnly;
}
else
hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly;
if (!shouldGesturesTriggerActive())
hitType |= HitTestRequest::ReadOnly;
if ((!scrollbar && !eventTarget) || !(hitType & HitTestRequest::ReadOnly)) {
IntPoint hitTestPoint = m_frame->view()->windowToContents(adjustedPoint);
HitTestResult result = hitTestResultAtPoint(hitTestPoint, hitType | HitTestRequest::AllowFrameScrollbars);
eventTarget = result.targetNode();
if (!scrollbar)
scrollbar = result.scrollbar();
}
if (scrollbar) {
bool eventSwallowed = scrollbar->gestureEvent(gestureEvent);
if (gestureEvent.type() == PlatformEvent::GestureScrollBegin && eventSwallowed)
m_scrollbarHandlingScrollGesture = scrollbar;
else if (gestureEvent.type() == PlatformEvent::GestureScrollEnd || !eventSwallowed)
m_scrollbarHandlingScrollGesture = 0;
if (eventSwallowed)
return true;
}
if (eventTarget) {
bool eventSwallowed = eventTarget->dispatchGestureEvent(gestureEvent);
if (gestureEvent.type() == PlatformEvent::GestureScrollBegin || gestureEvent.type() == PlatformEvent::GestureScrollEnd) {
if (eventSwallowed)
m_scrollGestureHandlingNode = eventTarget;
}
if (eventSwallowed)
return true;
}
TemporaryChange<PlatformEvent::Type> baseEventType(m_baseEventType, gestureEvent.type());
switch (gestureEvent.type()) {
case PlatformEvent::GestureScrollBegin:
return handleGestureScrollBegin(gestureEvent);
case PlatformEvent::GestureScrollUpdate:
case PlatformEvent::GestureScrollUpdateWithoutPropagation:
return handleGestureScrollUpdate(gestureEvent);
case PlatformEvent::GestureScrollEnd:
clearGestureScrollNodes();
return true;
case PlatformEvent::GestureTap:
return handleGestureTap(gestureEvent);
case PlatformEvent::GestureTapDown:
return handleGestureTapDown();
case PlatformEvent::GestureLongPress:
return handleGestureLongPress(gestureEvent);
case PlatformEvent::GestureLongTap:
return handleGestureLongTap(gestureEvent);
case PlatformEvent::GestureTwoFingerTap:
return handleGestureTwoFingerTap(gestureEvent);
case PlatformEvent::GesturePinchBegin:
case PlatformEvent::GesturePinchEnd:
case PlatformEvent::GesturePinchUpdate:
case PlatformEvent::GestureTapDownCancel:
break;
default:
ASSERT_NOT_REACHED();
}
return false;
}
bool EventHandler::handleGestureTap(const PlatformGestureEvent& gestureEvent)
{
IntPoint adjustedPoint = gestureEvent.position();
#if ENABLE(TOUCH_ADJUSTMENT)
adjustGesturePosition(gestureEvent, adjustedPoint);
#endif
PlatformMouseEvent fakeMouseMove(adjustedPoint, gestureEvent.globalPosition(),
NoButton, PlatformEvent::MouseMoved, 0,
gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), gestureEvent.timestamp());
mouseMoved(fakeMouseMove);
int tapCount = 1;
if (gestureEvent.deltaX() > 0)
tapCount = static_cast<int>(gestureEvent.deltaX());
bool defaultPrevented = false;
PlatformMouseEvent fakeMouseDown(adjustedPoint, gestureEvent.globalPosition(),
LeftButton, PlatformEvent::MousePressed, tapCount,
gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), gestureEvent.timestamp());
defaultPrevented |= handleMousePressEvent(fakeMouseDown);
PlatformMouseEvent fakeMouseUp(adjustedPoint, gestureEvent.globalPosition(),
LeftButton, PlatformEvent::MouseReleased, tapCount,
gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), gestureEvent.timestamp());
defaultPrevented |= handleMouseReleaseEvent(fakeMouseUp);
return defaultPrevented;
}
bool EventHandler::handleGestureLongPress(const PlatformGestureEvent& gestureEvent)
{
#if ENABLE(DRAG_SUPPORT)
if (m_frame->settings() && m_frame->settings()->touchDragDropEnabled()) {
IntPoint adjustedPoint = gestureEvent.position();
#if ENABLE(TOUCH_ADJUSTMENT)
adjustGesturePosition(gestureEvent, adjustedPoint);
#endif
PlatformMouseEvent mouseDownEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, 0, false, false, false, false, WTF::currentTime());
handleMousePressEvent(mouseDownEvent);
PlatformMouseEvent mouseDragEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MouseMoved, 0, false, false, false, false, WTF::currentTime());
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::DisallowShadowContent);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDragEvent);
m_didStartDrag = false;
RefPtr<Frame> subframe = subframeForHitTestResult(mev);
if (subframe && !m_mouseDownMayStartDrag) {
if (subframe->eventHandler()->handleGestureLongPress(gestureEvent))
return true;
}
handleDrag(mev, DontCheckDragHysteresis);
if (m_didStartDrag)
return true;
}
#endif
return handleGestureForTextSelectionOrContextMenu(gestureEvent);
}
bool EventHandler::handleGestureLongTap(const PlatformGestureEvent& gestureEvent)
{
#if ENABLE(CONTEXT_MENUS)
if (!m_didLongPressInvokeContextMenu)
return sendContextMenuEventForGesture(gestureEvent);
#endif // ENABLE(CONTEXT_MENUS)
return false;
}
bool EventHandler::handleGestureForTextSelectionOrContextMenu(const PlatformGestureEvent& gestureEvent)
{
#if ENABLE(CONTEXT_MENUS)
m_didLongPressInvokeContextMenu = (gestureEvent.type() == PlatformEvent::GestureLongPress);
return sendContextMenuEventForGesture(gestureEvent);
#else
return false;
#endif
}
bool EventHandler::handleGestureTwoFingerTap(const PlatformGestureEvent& gestureEvent)
{
return handleGestureForTextSelectionOrContextMenu(gestureEvent);
}
bool EventHandler::passGestureEventToWidget(const PlatformGestureEvent& gestureEvent, Widget* widget)
{
if (!widget)
return false;
if (!widget->isFrameView())
return false;
return toFrameView(widget)->frame()->eventHandler()->handleGestureEvent(gestureEvent);
}
bool EventHandler::passGestureEventToWidgetIfPossible(const PlatformGestureEvent& gestureEvent, RenderObject* renderer)
{
if (m_lastHitTestResultOverWidget && renderer && renderer->isWidget()) {
Widget* widget = toRenderWidget(renderer)->widget();
return widget && passGestureEventToWidget(gestureEvent, widget);
}
return false;
}
bool EventHandler::handleGestureScrollBegin(const PlatformGestureEvent& gestureEvent)
{
Document* document = m_frame->document();
RenderObject* documentRenderer = document->renderer();
if (!documentRenderer)
return false;
FrameView* view = m_frame->view();
if (!view)
return false;
LayoutPoint viewPoint = view->windowToContents(gestureEvent.position());
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::DisallowShadowContent);
HitTestResult result(viewPoint);
document->renderView()->hitTest(request, result);
m_lastHitTestResultOverWidget = result.isOverWidget();
m_scrollGestureHandlingNode = result.innerNode();
m_previousGestureScrolledNode = 0;
Node* node = m_scrollGestureHandlingNode.get();
if (node)
passGestureEventToWidgetIfPossible(gestureEvent, node->renderer());
return node && node->renderer();
}
bool EventHandler::handleGestureScrollUpdate(const PlatformGestureEvent& gestureEvent)
{
FloatSize delta(gestureEvent.deltaX(), gestureEvent.deltaY());
if (delta.isZero())
return false;
const float scaleFactor = m_frame->pageZoomFactor() * m_frame->frameScaleFactor();
delta.scale(1 / scaleFactor, 1 / scaleFactor);
Node* node = m_scrollGestureHandlingNode.get();
if (!node)
return sendScrollEventToView(gestureEvent, delta);
RenderObject* renderer = node->renderer();
if (!renderer)
return false;
RefPtr<FrameView> protector(m_frame->view());
if (passGestureEventToWidgetIfPossible(gestureEvent, renderer))
return true;
Node* stopNode = 0;
bool scrollShouldNotPropagate = gestureEvent.type() == PlatformEvent::GestureScrollUpdateWithoutPropagation;
if (scrollShouldNotPropagate)
stopNode = m_previousGestureScrolledNode.get();
ScrollGranularity granularity = ScrollByPixel;
bool horizontalScroll = scrollNode(delta.width(), granularity, ScrollLeft, ScrollRight, node, &stopNode);
bool verticalScroll = scrollNode(delta.height(), granularity, ScrollUp, ScrollDown, node, &stopNode);
if (scrollShouldNotPropagate)
m_previousGestureScrolledNode = stopNode;
if (horizontalScroll || verticalScroll) {
setFrameWasScrolledByUser();
return true;
}
return sendScrollEventToView(gestureEvent, delta);
}
bool EventHandler::sendScrollEventToView(const PlatformGestureEvent& gestureEvent, const FloatSize& scaledDelta)
{
FrameView* view = m_frame->view();
if (!view)
return false;
const float tickDivisor = static_cast<float>(WheelEvent::TickMultiplier);
IntPoint point(gestureEvent.position().x(), gestureEvent.position().y());
IntPoint globalPoint(gestureEvent.globalPosition().x(), gestureEvent.globalPosition().y());
PlatformWheelEvent syntheticWheelEvent(point, globalPoint,
scaledDelta.width(), scaledDelta.height(),
scaledDelta.width() / tickDivisor, scaledDelta.height() / tickDivisor,
ScrollByPixelWheelEvent,
gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey());
#if PLATFORM(MAC)
syntheticWheelEvent.setHasPreciseScrollingDeltas(true);
#endif
bool scrolledFrame = view->wheelEvent(syntheticWheelEvent);
if (scrolledFrame)
setFrameWasScrolledByUser();
return scrolledFrame;
}
void EventHandler::clearGestureScrollNodes()
{
m_scrollGestureHandlingNode = 0;
m_previousGestureScrolledNode = 0;
}
bool EventHandler::isScrollbarHandlingGestures() const
{
return m_scrollbarHandlingScrollGesture.get();
}
#endif // ENABLE(GESTURE_EVENTS)
#if ENABLE(TOUCH_ADJUSTMENT)
bool EventHandler::shouldApplyTouchAdjustment(const PlatformGestureEvent& event) const
{
if (m_frame->settings() && !m_frame->settings()->touchAdjustmentEnabled())
return false;
return !event.area().isEmpty();
}
bool EventHandler::bestClickableNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode)
{
IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter);
HitTestResult result = hitTestResultAtPoint(hitTestPoint, HitTestRequest::ReadOnly | HitTestRequest::Active, touchRadius);
IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius);
bool success = findBestClickableCandidate(targetNode, targetPoint, touchCenter, touchRect, result.rectBasedTestResult());
if (success && targetNode)
targetNode = targetNode->deprecatedShadowAncestorNode();
return success;
}
bool EventHandler::bestContextMenuNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode)
{
IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter);
HitTestResult result = hitTestResultAtPoint(hitTestPoint, HitTestRequest::ReadOnly | HitTestRequest::Active, touchRadius);
IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius);
return findBestContextMenuCandidate(targetNode, targetPoint, touchCenter, touchRect, result.rectBasedTestResult());
}
bool EventHandler::bestZoomableAreaForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntRect& targetArea, Node*& targetNode)
{
IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter);
HitTestResult result = hitTestResultAtPoint(hitTestPoint, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::DisallowShadowContent, touchRadius);
IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius);
return findBestZoomableArea(targetNode, targetArea, touchCenter, touchRect, result.rectBasedTestResult());
}
bool EventHandler::adjustGesturePosition(const PlatformGestureEvent& gestureEvent, IntPoint& adjustedPoint)
{
if (!shouldApplyTouchAdjustment(gestureEvent))
return false;
Node* targetNode = 0;
switch (gestureEvent.type()) {
case PlatformEvent::GestureTap:
case PlatformEvent::GestureTapDown:
bestClickableNodeForTouchPoint(gestureEvent.position(), IntSize(gestureEvent.area().width() / 2, gestureEvent.area().height() / 2), adjustedPoint, targetNode);
break;
case PlatformEvent::GestureLongPress:
case PlatformEvent::GestureLongTap:
case PlatformEvent::GestureTwoFingerTap:
bestContextMenuNodeForTouchPoint(gestureEvent.position(), IntSize(gestureEvent.area().width() / 2, gestureEvent.area().height() / 2), adjustedPoint, targetNode);
break;
default:
ASSERT_NOT_REACHED();
}
return targetNode;
}
#endif
#if ENABLE(CONTEXT_MENUS)
bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event)
{
Document* doc = m_frame->document();
FrameView* v = m_frame->view();
if (!v)
return false;
m_mousePressed = false;
bool swallowEvent;
LayoutPoint viewportPos = v->windowToContents(event.position());
HitTestRequest request(HitTestRequest::Active | HitTestRequest::DisallowShadowContent);
MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event);
if (m_frame->editor().behavior().shouldSelectOnContextualMenuClick()
&& !m_frame->selection()->contains(viewportPos)
&& !mev.scrollbar()
&& (m_frame->selection()->isContentEditable() || (mev.targetNode() && mev.targetNode()->isTextNode()))) {
m_mouseDownMayStartSelect = true; selectClosestWordOrLinkFromMouseEvent(mev);
}
swallowEvent = !dispatchMouseEvent(eventNames().contextmenuEvent, mev.targetNode(), true, 0, event, false);
return swallowEvent;
}
bool EventHandler::sendContextMenuEventForKey()
{
FrameView* view = m_frame->view();
if (!view)
return false;
Document* doc = m_frame->document();
if (!doc)
return false;
m_mousePressed = false;
static const int kContextMenuMargin = 1;
#if OS(WINDOWS) && !OS(WINCE)
int rightAligned = ::GetSystemMetrics(SM_MENUDROPALIGNMENT);
#else
int rightAligned = 0;
#endif
IntPoint location;
Element* focusedElement = doc->focusedElement();
FrameSelection* selection = m_frame->selection();
Position start = selection->selection().start();
if (start.deprecatedNode() && (selection->rootEditableElement() || selection->isRange())) {
RefPtr<Range> selectionRange = selection->toNormalizedRange();
IntRect firstRect = m_frame->editor().firstRectForRange(selectionRange.get());
int x = rightAligned ? firstRect.maxX() : firstRect.x();
int y = firstRect.maxY() ? firstRect.maxY() - 1 : 0;
location = IntPoint(x, y);
} else if (focusedElement) {
RenderBoxModelObject* box = focusedElement->renderBoxModelObject();
if (!box)
return false;
IntRect clippedRect = box->pixelSnappedAbsoluteClippedOverflowRect();
location = IntPoint(clippedRect.x(), clippedRect.maxY() - 1);
} else {
location = IntPoint(
rightAligned ? view->contentsWidth() - kContextMenuMargin : kContextMenuMargin,
kContextMenuMargin);
}
m_frame->view()->setCursor(pointerCursor());
IntPoint position = view->contentsToRootView(location);
IntPoint globalPosition = view->hostWindow()->rootViewToScreen(IntRect(position, IntSize())).location();
Node* targetNode = doc->focusedElement();
if (!targetNode)
targetNode = doc;
HitTestResult result(position);
result.setInnerNode(targetNode);
doc->updateHoverActiveState(HitTestRequest::Active | HitTestRequest::DisallowShadowContent, result.innerElement());
#if OS(WINDOWS)
PlatformEvent::Type eventType = PlatformEvent::MouseReleased;
#else
PlatformEvent::Type eventType = PlatformEvent::MousePressed;
#endif
PlatformMouseEvent mouseEvent(position, globalPosition, RightButton, eventType, 1, false, false, false, false, WTF::currentTime());
return !dispatchMouseEvent(eventNames().contextmenuEvent, targetNode, true, 0, mouseEvent, false);
}
#if ENABLE(GESTURE_EVENTS)
bool EventHandler::sendContextMenuEventForGesture(const PlatformGestureEvent& event)
{
#if OS(WINDOWS)
PlatformEvent::Type eventType = PlatformEvent::MouseReleased;
#else
PlatformEvent::Type eventType = PlatformEvent::MousePressed;
#endif
IntPoint adjustedPoint = event.position();
#if ENABLE(TOUCH_ADJUSTMENT)
adjustGesturePosition(event, adjustedPoint);
#endif
PlatformMouseEvent mouseEvent(adjustedPoint, event.globalPosition(), RightButton, eventType, 1, false, false, false, false, WTF::currentTime());
handleMousePressEvent(mouseEvent);
return sendContextMenuEvent(mouseEvent);
}
#endif // ENABLE(GESTURE_EVENTS)
#endif // ENABLE(CONTEXT_MENUS)
void EventHandler::scheduleHoverStateUpdate()
{
if (!m_hoverTimer.isActive())
m_hoverTimer.startOneShot(0);
}
void EventHandler::scheduleCursorUpdate()
{
if (!m_cursorUpdateTimer.isActive())
m_cursorUpdateTimer.startOneShot(cursorUpdateInterval);
}
void EventHandler::dispatchFakeMouseMoveEventSoon()
{
if (m_mousePressed)
return;
if (m_mousePositionIsUnknown)
return;
Settings* settings = m_frame->settings();
if (settings && !settings->deviceSupportsMouse())
return;
if (m_maxMouseMovedDuration > fakeMouseMoveDurationThreshold) {
if (m_fakeMouseMoveEventTimer.isActive())
m_fakeMouseMoveEventTimer.stop();
m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveLongInterval);
} else {
if (!m_fakeMouseMoveEventTimer.isActive())
m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveShortInterval);
}
}
void EventHandler::dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad& quad)
{
FrameView* view = m_frame->view();
if (!view)
return;
if (!quad.containsPoint(view->windowToContents(m_lastKnownMousePosition)))
return;
dispatchFakeMouseMoveEventSoon();
}
void EventHandler::cancelFakeMouseMoveEvent()
{
m_fakeMouseMoveEventTimer.stop();
}
void EventHandler::fakeMouseMoveEventTimerFired(Timer<EventHandler>* timer)
{
ASSERT_UNUSED(timer, timer == &m_fakeMouseMoveEventTimer);
ASSERT(!m_mousePressed);
Settings* settings = m_frame->settings();
if (settings && !settings->deviceSupportsMouse())
return;
FrameView* view = m_frame->view();
if (!view)
return;
if (!m_frame->page() || !m_frame->page()->isOnscreen() || !m_frame->page()->focusController()->isActive())
return;
bool shiftKey;
bool ctrlKey;
bool altKey;
bool metaKey;
PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey);
PlatformMouseEvent fakeMouseMoveEvent(m_lastKnownMousePosition, m_lastKnownMouseGlobalPosition, NoButton, PlatformEvent::MouseMoved, 0, shiftKey, ctrlKey, altKey, metaKey, currentTime());
mouseMoved(fakeMouseMoveEvent);
}
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::Move | HitTestRequest::DisallowShadowContent);
HitTestResult result(view->windowToContents(m_lastKnownMousePosition));
renderer->hitTest(request, result);
m_frame->document()->updateHoverActiveState(request, result.innerElement());
}
}
}
bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)
{
ASSERT(!(accessKeyModifiers() & PlatformEvent::ShiftKey));
if ((evt.modifiers() & ~PlatformEvent::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
#if ENABLE(FULLSCREEN_API)
bool EventHandler::isKeyEventAllowedInFullScreen(const PlatformKeyboardEvent& keyEvent) const
{
Document* document = m_frame->document();
if (document->webkitFullScreenKeyboardInputAllowed())
return true;
if (keyEvent.type() == PlatformKeyboardEvent::Char) {
if (keyEvent.text().length() != 1)
return false;
UChar character = keyEvent.text()[0];
return character == ' ';
}
int keyCode = keyEvent.windowsVirtualKeyCode();
return (keyCode >= VK_BACK && keyCode <= VK_CAPITAL)
|| (keyCode >= VK_SPACE && keyCode <= VK_DELETE)
|| (keyCode >= VK_OEM_1 && keyCode <= VK_OEM_PLUS)
|| (keyCode >= VK_MULTIPLY && keyCode <= VK_OEM_8);
}
#endif
bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)
{
RefPtr<FrameView> protector(m_frame->view());
#if ENABLE(FULLSCREEN_API)
if (m_frame->document()->webkitIsFullScreen() && !isKeyEventAllowedInFullScreen(initialKeyEvent))
return false;
#endif
if (initialKeyEvent.windowsVirtualKeyCode() == VK_CAPITAL)
capsLockStateMayHaveChanged();
#if ENABLE(PAN_SCROLLING)
if (Page* page = m_frame->page()) {
if (page->mainFrame()->eventHandler()->panScrollInProgress()) {
if (initialKeyEvent.type() == PlatformEvent::KeyDown || initialKeyEvent.type() == PlatformEvent::RawKeyDown)
stopAutoscrollTimer();
return true;
}
}
#endif
RefPtr<Node> node = eventTargetNodeForDocument(m_frame->document());
if (!node)
return false;
UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
UserTypingGestureIndicator typingGestureIndicator(m_frame);
if (FrameView* view = m_frame->view())
view->resetDeferredRepaintDelay();
m_frame->loader()->resetMultipleFormSubmissionProtection();
bool matchedAnAccessKey = false;
if (initialKeyEvent.type() == PlatformEvent::KeyDown)
matchedAnAccessKey = handleAccessKey(initialKeyEvent);
if (initialKeyEvent.type() == PlatformEvent::KeyUp || initialKeyEvent.type() == PlatformEvent::Char)
return !node->dispatchKeyEvent(initialKeyEvent);
bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks();
PlatformKeyboardEvent keyDownEvent = initialKeyEvent;
if (keyDownEvent.type() != PlatformEvent::RawKeyDown)
keyDownEvent.disambiguateKeyDownEvent(PlatformEvent::RawKeyDown, backwardCompatibilityMode);
RefPtr<KeyboardEvent> keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
if (matchedAnAccessKey)
keydown->setDefaultPrevented(true);
keydown->setTarget(node);
if (initialKeyEvent.type() == PlatformEvent::RawKeyDown) {
node->dispatchEvent(keydown, IGNORE_EXCEPTION);
bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame();
return keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame;
}
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, IGNORE_EXCEPTION);
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;
if (!keydownResult) {
node = eventTargetNodeForDocument(m_frame->document());
if (!node)
return false;
}
PlatformKeyboardEvent keyPressEvent = initialKeyEvent;
keyPressEvent.disambiguateKeyDownEvent(PlatformEvent::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, IGNORE_EXCEPTION);
return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled();
}
static FocusDirection focusDirectionForKey(const AtomicString& keyIdentifier)
{
DEFINE_STATIC_LOCAL(AtomicString, Down, ("Down", AtomicString::ConstructFromLiteral));
DEFINE_STATIC_LOCAL(AtomicString, Up, ("Up", AtomicString::ConstructFromLiteral));
DEFINE_STATIC_LOCAL(AtomicString, Left, ("Left", AtomicString::ConstructFromLiteral));
DEFINE_STATIC_LOCAL(AtomicString, Right, ("Right", AtomicString::ConstructFromLiteral));
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;
}
static void handleKeyboardSelectionMovement(FrameSelection* selection, KeyboardEvent* event)
{
if (!event)
return;
bool isOptioned = event->getModifierState("Alt");
bool isCommanded = event->getModifierState("Meta");
SelectionDirection direction = DirectionForward;
TextGranularity granularity = CharacterGranularity;
switch (focusDirectionForKey(event->keyIdentifier())) {
case FocusDirectionNone:
return;
case FocusDirectionForward:
case FocusDirectionBackward:
ASSERT_NOT_REACHED();
return;
case FocusDirectionUp:
direction = DirectionBackward;
granularity = isCommanded ? DocumentBoundary : LineGranularity;
break;
case FocusDirectionDown:
direction = DirectionForward;
granularity = isCommanded ? DocumentBoundary : LineGranularity;
break;
case FocusDirectionLeft:
direction = DirectionLeft;
granularity = (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity;
break;
case FocusDirectionRight:
direction = DirectionRight;
granularity = (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity;
break;
}
FrameSelection::EAlteration alternation = event->getModifierState("Shift") ? FrameSelection::AlterationExtend : FrameSelection::AlterationMove;
selection->modify(alternation, direction, granularity, UserTriggered);
event->setDefaultHandled();
}
void EventHandler::handleKeyboardSelectionMovementForAccessibility(KeyboardEvent* event)
{
if (event->type() == eventNames().keydownEvent) {
if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled())
handleKeyboardSelectionMovement(m_frame->selection(), event);
}
}
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 if (event->keyIdentifier() == "U+0008")
defaultBackspaceEventHandler(event);
else {
FocusDirection direction = focusDirectionForKey(event->keyIdentifier());
if (direction != FocusDirectionNone)
defaultArrowEventHandler(direction, event);
}
handleKeyboardSelectionMovementForAccessibility(event);
}
if (event->type() == eventNames().keypressEvent) {
m_frame->editor().handleKeyboardEvent(event);
if (event->defaultHandled())
return;
if (event->charCode() == ' ')
defaultSpaceEventHandler(event);
}
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::dragHysteresisExceeded(const IntPoint& floatDragViewportLocation) const
{
FloatPoint dragViewportLocation(floatDragViewportLocation.x(), floatDragViewportLocation.y());
return dragHysteresisExceeded(dragViewportLocation);
}
bool EventHandler::dragHysteresisExceeded(const FloatPoint& dragViewportLocation) const
{
FrameView* view = m_frame->view();
if (!view)
return false;
IntPoint dragLocation = view->windowToContents(flooredIntPoint(dragViewportLocation));
IntSize delta = dragLocation - m_mouseDownPos;
int threshold = GeneralDragHysteresis;
switch (dragState().type) {
case DragSourceActionSelection:
threshold = TextDragHysteresis;
break;
case DragSourceActionImage:
threshold = ImageDragHysteresis;
break;
case DragSourceActionLink:
threshold = LinkDragHysteresis;
break;
case DragSourceActionDHTML:
break;
case DragSourceActionNone:
case DragSourceActionAny:
ASSERT_NOT_REACHED();
}
return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold;
}
void EventHandler::freeClipboard()
{
if (!dragState().clipboard)
return;
dragState().clipboard->setAccessPolicy(ClipboardNumb);
dragState().clipboard = 0;
}
void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation)
{
HitTestRequest request(HitTestRequest::Release | HitTestRequest::DisallowShadowContent);
prepareMouseEvent(request, event);
if (dragState().source && dragState().shouldDispatchEvents) {
dragState().clipboard->setDestinationOperation(operation);
dispatchDragSrcEvent(eventNames().dragendEvent, event);
}
freeClipboard();
dragState().source = 0;
m_mouseDownMayStartDrag = false;
}
void EventHandler::updateDragStateAfterEditDragIfNeeded(Element* rootEditableElement)
{
if (dragState().source && !dragState().source->inDocument())
dragState().source = rootEditableElement;
}
bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event)
{
return !dispatchDragEvent(eventType, dragState().source.get(), event, dragState().clipboard.get());
}
static bool ExactlyOneBitSet(DragSourceAction n)
{
return n && !(n & (n - 1));
}
bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event, CheckDragHysteresis checkDragHysteresis)
{
if (event.event().button() != LeftButton || event.event().type() != PlatformEvent::MouseMoved) {
m_mousePressed = false;
return false;
}
if (eventLoopHandleMouseDragged(event))
return true;
if (m_mouseDownMayStartDrag && !dragState().source) {
dragState().shouldDispatchEvents = (updateDragSourceActionsAllowed() & DragSourceActionDHTML);
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::DisallowShadowContent);
HitTestResult result(m_mouseDownPos);
m_frame->contentRenderer()->hitTest(request, result);
if (m_frame->page())
dragState().source = m_frame->page()->dragController()->draggableElement(m_frame, result.innerElement(), m_mouseDownPos, dragState());
if (!dragState().source)
m_mouseDownMayStartDrag = false; else
m_dragMayStartSelectionInstead = (dragState().type & DragSourceActionSelection);
}
if (m_mouseDownMayStartDrag && m_dragMayStartSelectionInstead && (dragState().type & DragSourceActionSelection) && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) {
ASSERT(event.event().type() == PlatformEvent::MouseMoved);
if ((dragState().type & DragSourceActionImage)) {
dragState().type = DragSourceActionImage;
} else if (!(dragState().type & (DragSourceActionDHTML | DragSourceActionLink))) {
m_mouseDownMayStartDrag = false;
dragState().source = 0;
if (eventActivatedView(event.event()))
m_mouseDownMayStartSelect = false;
} else {
m_dragMayStartSelectionInstead = false;
}
}
if (!m_mouseDownMayStartDrag)
return !mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll;
if (!ExactlyOneBitSet(dragState().type)) {
ASSERT((dragState().type & DragSourceActionSelection));
ASSERT((dragState().type & ~DragSourceActionSelection) == DragSourceActionDHTML
|| (dragState().type & ~DragSourceActionSelection) == DragSourceActionImage
|| (dragState().type & ~DragSourceActionSelection) == DragSourceActionLink);
dragState().type = DragSourceActionSelection;
}
if (FrameView* view = m_frame->view()) {
view->setCursor(pointerCursor());
}
if (checkDragHysteresis == ShouldCheckDragHysteresis && !dragHysteresisExceeded(event.event().position()))
return true;
invalidateClick();
DragOperation srcOp = DragOperationNone;
freeClipboard();
dragState().clipboard = createDraggingClipboard();
if (dragState().shouldDispatchEvents) {
if (dragState().type == DragSourceActionDHTML) {
if (RenderObject* renderer = dragState().source->renderer()) {
FloatPoint absPos = renderer->localToAbsolute();
IntSize delta = m_mouseDownPos - roundedIntPoint(absPos);
dragState().clipboard->setDragImage(dragState().source.get(), delta.width(), delta.height());
} else {
m_mouseDownMayStartDrag = false;
goto cleanupDrag;
}
}
m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown)
&& !m_frame->selection()->isInPasswordField();
dragState().clipboard->setAccessPolicy(ClipboardImageWritable);
if (m_mouseDownMayStartDrag) {
srcOp = dragState().clipboard->sourceOperation();
dragState().clipboard->setDragHasStarted();
}
}
if (m_mouseDownMayStartDrag) {
Page* page = m_frame->page();
DragController* dragController = page ? page->dragController() : 0;
m_didStartDrag = dragController && dragController->startDrag(m_frame, dragState(), srcOp, event.event(), m_mouseDownPos);
if (m_didStartDrag) {
m_mouseDownMayStartDrag = false;
return true;
}
if (dragState().source && dragState().shouldDispatchEvents) {
dispatchDragSrcEvent(eventNames().dragendEvent, event.event());
m_mouseDownMayStartDrag = false;
}
}
cleanupDrag:
if (!m_mouseDownMayStartDrag) {
freeClipboard();
dragState().source = 0;
}
return true;
}
#endif // ENABLE(DRAG_SUPPORT)
bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, TextEventInputType inputType)
{
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->document()->domWindow(), text, inputType);
event->setUnderlyingEvent(underlyingEvent);
target->dispatchEvent(event, IGNORE_EXCEPTION);
return event->defaultHandled();
}
bool EventHandler::isKeyboardOptionTab(KeyboardEvent* event)
{
return event
&& (event->type() == eventNames().keydownEvent || event->type() == eventNames().keypressEvent)
&& event->altKey()
&& event->keyIdentifier() == "U+0009";
}
bool EventHandler::eventInvertsTabsToLinksClientCallResult(KeyboardEvent* event)
{
#if PLATFORM(MAC) || PLATFORM(QT) || PLATFORM(EFL)
return EventHandler::isKeyboardOptionTab(event);
#else
return false;
#endif
}
bool EventHandler::tabsToLinks(KeyboardEvent* event) const
{
Page* page = m_frame->page();
if (!page)
return false;
bool tabsToLinksClientCallResult = page->chrome().client()->keyboardUIMode() & KeyboardAccessTabsToLinks;
return eventInvertsTabsToLinksClientCallResult(event) ? !tabsToLinksClientCallResult : tabsToLinksClientCallResult;
}
void EventHandler::defaultTextInputEventHandler(TextEvent* event)
{
if (m_frame->editor().handleTextEvent(event))
event->setDefaultHandled();
}
void EventHandler::defaultSpaceEventHandler(KeyboardEvent* event)
{
ASSERT(event->type() == eventNames().keypressEvent);
if (event->ctrlKey() || event->metaKey() || event->altKey() || event->altGraphKey())
return;
ScrollLogicalDirection direction = event->shiftKey() ? ScrollBlockDirectionBackward : ScrollBlockDirectionForward;
if (logicalScrollOverflow(direction, ScrollByPage)) {
event->setDefaultHandled();
return;
}
FrameView* view = m_frame->view();
if (!view)
return;
if (view->logicalScroll(direction, ScrollByPage))
event->setDefaultHandled();
}
void EventHandler::defaultBackspaceEventHandler(KeyboardEvent* event)
{
ASSERT(event->type() == eventNames().keydownEvent);
if (event->ctrlKey() || event->metaKey() || event->altKey() || event->altGraphKey())
return;
if (!m_frame->editor().behavior().shouldNavigateBackOnBackspace())
return;
Page* page = m_frame->page();
if (!page)
return;
if (!m_frame->settings()->backspaceKeyNavigationEnabled())
return;
bool handledEvent = false;
if (event->shiftKey())
handledEvent = page->goForward();
else
handledEvent = page->goBack();
if (handledEvent)
event->setDefaultHandled();
}
void EventHandler::defaultArrowEventHandler(FocusDirection focusDirection, KeyboardEvent* event)
{
ASSERT(event->type() == eventNames().keydownEvent);
if (event->ctrlKey() || event->metaKey() || event->altGraphKey() || event->shiftKey())
return;
Page* page = m_frame->page();
if (!page)
return;
if (!isSpatialNavigationEnabled(m_frame))
return;
if (m_frame->document()->inDesignMode())
return;
if (page->focusController()->advanceFocus(focusDirection, event))
event->setDefaultHandled();
}
void EventHandler::defaultTabEventHandler(KeyboardEvent* event)
{
ASSERT(event->type() == eventNames().keydownEvent);
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;
if (m_frame->document()->inDesignMode())
return;
if (page->focusController()->advanceFocus(focusDirection, event))
event->setDefaultHandled();
}
void EventHandler::capsLockStateMayHaveChanged()
{
Document* d = m_frame->document();
if (Element* element = d->focusedElement()) {
if (RenderObject* r = element->renderer()) {
if (r->isTextField())
toRenderTextControlSingleLine(r)->capsLockStateMayHaveChanged();
}
}
}
void EventHandler::sendScrollEvent()
{
setFrameWasScrolledByUser();
if (m_frame->view() && m_frame->document())
m_frame->document()->eventQueue()->enqueueOrDispatchScrollEvent(m_frame->document(), DocumentEventQueue::ScrollEventDocumentTarget);
}
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());
}
void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool setLast)
{
if (m_lastScrollbarUnderMouse != scrollbar) {
if (m_lastScrollbarUnderMouse)
m_lastScrollbarUnderMouse->mouseExited();
if (scrollbar && setLast)
scrollbar->mouseEntered();
m_lastScrollbarUnderMouse = setLast ? scrollbar : 0;
}
}
#if ENABLE(TOUCH_EVENTS)
static const AtomicString& eventNameForTouchPointState(PlatformTouchPoint::State state)
{
switch (state) {
case PlatformTouchPoint::TouchReleased:
return eventNames().touchendEvent;
case PlatformTouchPoint::TouchCancelled:
return eventNames().touchcancelEvent;
case PlatformTouchPoint::TouchPressed:
return eventNames().touchstartEvent;
case PlatformTouchPoint::TouchMoved:
return eventNames().touchmoveEvent;
case PlatformTouchPoint::TouchStationary:
default:
ASSERT_NOT_REACHED();
return emptyAtom;
}
}
HitTestResult EventHandler::hitTestResultInFrame(Frame* frame, const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType)
{
HitTestResult result(point);
if (!frame || !frame->contentRenderer())
return result;
if (frame->view()) {
IntRect rect = frame->view()->visibleContentRect();
if (!rect.contains(roundedIntPoint(point)))
return result;
}
frame->contentRenderer()->hitTest(HitTestRequest(hitType), result);
return result;
}
bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
{
RefPtr<TouchList> touches = TouchList::create();
typedef HashMap<EventTarget*, RefPtr<TouchList> > TargetTouchesMap;
TargetTouchesMap touchesByTarget;
typedef HashSet<RefPtr<EventTarget> > EventTargetSet;
struct {
RefPtr<TouchList> m_touches;
EventTargetSet m_targets;
} changedTouches[PlatformTouchPoint::TouchStateEnd];
const Vector<PlatformTouchPoint>& points = event.touchPoints();
UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
unsigned i;
bool freshTouchEvents = true;
bool allTouchReleased = true;
for (i = 0; i < points.size(); ++i) {
const PlatformTouchPoint& point = points[i];
if (point.state() != PlatformTouchPoint::TouchPressed)
freshTouchEvents = false;
if (point.state() != PlatformTouchPoint::TouchReleased && point.state() != PlatformTouchPoint::TouchCancelled)
allTouchReleased = false;
}
for (i = 0; i < points.size(); ++i) {
const PlatformTouchPoint& point = points[i];
PlatformTouchPoint::State pointState = point.state();
LayoutPoint pagePoint = documentPointForWindowPoint(m_frame, point.pos());
HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent;
switch (pointState) {
case PlatformTouchPoint::TouchPressed:
hitType |= HitTestRequest::Active;
break;
case PlatformTouchPoint::TouchMoved:
hitType |= HitTestRequest::Active | HitTestRequest::Move | HitTestRequest::ReadOnly;
break;
case PlatformTouchPoint::TouchReleased:
case PlatformTouchPoint::TouchCancelled:
hitType |= HitTestRequest::Release;
break;
case PlatformTouchPoint::TouchStationary:
hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly;
break;
default:
ASSERT_NOT_REACHED();
break;
}
if (shouldGesturesTriggerActive())
hitType |= HitTestRequest::ReadOnly;
unsigned touchPointTargetKey = point.id() + 1;
RefPtr<EventTarget> touchTarget;
if (pointState == PlatformTouchPoint::TouchPressed) {
HitTestResult result;
if (freshTouchEvents) {
result = hitTestResultAtPoint(pagePoint, hitType);
m_originatingTouchPointTargetKey = touchPointTargetKey;
} else if (m_originatingTouchPointDocument.get() && m_originatingTouchPointDocument->frame()) {
LayoutPoint pagePointInOriginatingDocument = documentPointForWindowPoint(m_originatingTouchPointDocument->frame(), point.pos());
result = hitTestResultInFrame(m_originatingTouchPointDocument->frame(), pagePointInOriginatingDocument, hitType);
if (!result.innerNode())
continue;
} else
continue;
Node* node = result.innerNode();
ASSERT(node);
if (node->isTextNode())
node = EventPathWalker::parent(node);
if (InspectorInstrumentation::handleTouchEvent(m_frame->page(), node))
return true;
Document* doc = node->document();
if (freshTouchEvents) {
m_originatingTouchPointDocument = doc;
freshTouchEvents = false;
}
if (!doc)
continue;
if (!doc->hasTouchEventHandlers())
continue;
m_originatingTouchPointTargets.set(touchPointTargetKey, node);
touchTarget = node;
} else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) {
if (!shouldGesturesTriggerActive() && allTouchReleased)
m_frame->document()->updateHoverActiveState(hitType, 0);
if (touchPointTargetKey == m_originatingTouchPointTargetKey)
m_originatingTouchPointTargetKey = 0;
touchTarget = m_originatingTouchPointTargets.take(touchPointTargetKey);
} else
touchTarget = m_originatingTouchPointTargets.get(touchPointTargetKey);
if (!touchTarget.get())
continue;
Document* doc = touchTarget->toNode()->document();
if (!doc)
continue;
if (!doc->hasTouchEventHandlers())
continue;
Frame* targetFrame = doc->frame();
if (!targetFrame)
continue;
if (m_frame != targetFrame) {
pagePoint = documentPointForWindowPoint(targetFrame, point.pos());
}
float scaleFactor = targetFrame->pageZoomFactor() * targetFrame->frameScaleFactor();
int adjustedPageX = lroundf(pagePoint.x() / scaleFactor);
int adjustedPageY = lroundf(pagePoint.y() / scaleFactor);
RefPtr<Touch> touch = Touch::create(targetFrame, touchTarget.get(), point.id(),
point.screenPos().x(), point.screenPos().y(),
adjustedPageX, adjustedPageY,
point.radiusX(), point.radiusY(), point.rotationAngle(), point.force());
TargetTouchesMap::iterator targetTouchesIterator = touchesByTarget.find(touchTarget.get());
if (targetTouchesIterator == touchesByTarget.end())
targetTouchesIterator = touchesByTarget.set(touchTarget.get(), TouchList::create()).iterator;
if (pointState != PlatformTouchPoint::TouchReleased && pointState != PlatformTouchPoint::TouchCancelled) {
touches->append(touch);
targetTouchesIterator->value->append(touch);
}
if (pointState != PlatformTouchPoint::TouchStationary) {
ASSERT(pointState < PlatformTouchPoint::TouchStateEnd);
if (!changedTouches[pointState].m_touches)
changedTouches[pointState].m_touches = TouchList::create();
changedTouches[pointState].m_touches->append(touch);
changedTouches[pointState].m_targets.add(touchTarget);
}
}
m_touchPressed = touches->length() > 0;
if (allTouchReleased)
m_originatingTouchPointDocument.clear();
bool swallowedEvent = false;
RefPtr<TouchList> emptyList = TouchList::create();
for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) {
if (!changedTouches[state].m_touches)
continue;
bool isTouchCancelEvent = (state == PlatformTouchPoint::TouchCancelled);
RefPtr<TouchList>& effectiveTouches(isTouchCancelEvent ? emptyList : touches);
const AtomicString& stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
const EventTargetSet& targetsForState = changedTouches[state].m_targets;
for (EventTargetSet::const_iterator it = targetsForState.begin(); it != targetsForState.end(); ++it) {
EventTarget* touchEventTarget = it->get();
RefPtr<TouchList> targetTouches(isTouchCancelEvent ? emptyList : touchesByTarget.get(touchEventTarget));
ASSERT(targetTouches);
RefPtr<TouchEvent> touchEvent =
TouchEvent::create(effectiveTouches.get(), targetTouches.get(), changedTouches[state].m_touches.get(),
stateName, touchEventTarget->toNode()->document()->defaultView(),
0, 0, 0, 0, event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey());
touchEventTarget->toNode()->dispatchTouchEvent(touchEvent.get());
swallowedEvent = swallowedEvent || touchEvent->defaultPrevented() || touchEvent->defaultHandled();
}
}
return swallowedEvent;
}
bool EventHandler::dispatchSyntheticTouchEventIfEnabled(const PlatformMouseEvent& event)
{
if (!m_frame || !m_frame->settings() || !m_frame->settings()->isTouchEventEmulationEnabled())
return false;
PlatformEvent::Type eventType = event.type();
if (eventType != PlatformEvent::MouseMoved && eventType != PlatformEvent::MousePressed && eventType != PlatformEvent::MouseReleased)
return false;
HitTestRequest request(HitTestRequest::Active | HitTestRequest::DisallowShadowContent);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);
if (mev.scrollbar() || subframeForHitTestResult(mev))
return false;
if (eventType == PlatformEvent::MouseMoved && !m_touchPressed)
return true;
SyntheticSingleTouchEvent touchEvent(event);
return handleTouchEvent(touchEvent);
}
#endif
void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event)
{
m_mousePositionIsUnknown = false;
m_lastKnownMousePosition = event.position();
m_lastKnownMouseGlobalPosition = event.globalPosition();
}
}