/* * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2013, 2014 Apple Inc. All rights reserved. * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org) * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies) * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "EventHandler.h" #include "AXObjectCache.h" #include "AutoscrollController.h" #include "BackForwardController.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 "ExceptionCodePlaceholder.h" #include "FileList.h" #include "FloatPoint.h" #include "FloatRect.h" #include "FocusController.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 "MainFrame.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 "SVGDocument.h" #include "SVGElementInstance.h" #include "SVGNames.h" #include "SVGUseElement.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 "UserGestureIndicator.h" #include "UserTypingGestureIndicator.h" #include "WheelEvent.h" #include "WindowsKeyboardCodes.h" #include #include #include #include #if ENABLE(TOUCH_EVENTS) #if ENABLE(IOS_TOUCH_EVENTS) #include "PlatformTouchEventIOS.h" #else #include "PlatformTouchEvent.h" #endif #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) // The link drag hysteresis is much larger than the others because there // needs to be enough space to cancel the link press without starting a link drag, // and because dragging links is rare. const int LinkDragHysteresis = 40; const int ImageDragHysteresis = 5; const int TextDragHysteresis = 3; const int GeneralDragHysteresis = 3; #endif // ENABLE(DRAG_SUPPORT) #if ENABLE(IOS_GESTURE_EVENTS) const float GestureUnknown = 0; #endif #if ENABLE(IOS_TOUCH_EVENTS) // FIXME: Share this constant with EventHandler and SliderThumbElement. const unsigned InvalidTouchIdentifier = 0; #endif // Match key code of composition keydown event on windows. // IE sends VK_PROCESSKEY which has value 229; const int CompositionEventKeyCode = 229; using namespace SVGNames; // The amount of time to wait before sending a fake mouse event, triggered // during a scroll. The short interval is used if the content responds to the mouse events // in fakeMouseMoveDurationThreshold or less, otherwise the long interval is used. const double fakeMouseMoveDurationThreshold = 0.01; const double fakeMouseMoveShortInterval = 0.1; const double fakeMouseMoveLongInterval = 0.25; #if ENABLE(CURSOR_SUPPORT) // The amount of time to wait for a cursor update on style and layout changes // Set to 50Hz, no need to be faster than common screen refresh rate const double cursorUpdateInterval = 0.02; const int maximumCursorSize = 128; #endif #if ENABLE(MOUSE_CURSOR_SCALE) // It's pretty unlikely that a scale of less than one would ever be used. But all we really // need to ensure here is that the scale isn't so small that integer overflow can occur when // dividing cursor sizes (limited above) by the 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 = std::max(*m_maxDuration, monotonicallyIncreasingTime() - m_start); } private: double* m_maxDuration; double m_start; }; #if ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS) class SyntheticTouchPoint : public PlatformTouchPoint { public: // The default values are based on http://dvcs.w3.org/hg/webevents/raw-file/tip/touchevents.html 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; // There is only one active TouchPoint. 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 // ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS) 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, Element** stopElement, const IntPoint& wheelEventAbsolutePoint) { 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, stopElement, enclosingBox, wheelEventAbsolutePoint); } #if (ENABLE(TOUCH_EVENTS) && !PLATFORM(IOS)) static inline bool shouldGesturesTriggerActive() { // If the platform we're on supports GestureTapDown and GestureTapCancel then we'll // rely on them to set the active state. Unfortunately there's no generic way to // know in advance what event types are supported. return false; } #endif #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) #if ENABLE(CURSOR_SUPPORT) , m_cursorUpdateTimer(this, &EventHandler::cursorUpdateTimerFired) #endif , m_autoscrollController(adoptPtr(new AutoscrollController)) , m_mouseDownMayStartAutoscroll(false) , m_mouseDownWasInSubframe(false) , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired) , m_svgPan(false) , m_resizeLayer(0) , m_eventHandlerWillResetCapturingMouseEventsElement(nullptr) , m_clickCount(0) #if ENABLE(IOS_GESTURE_EVENTS) , m_gestureInitialDiameter(GestureUnknown) , m_gestureLastDiameter(GestureUnknown) , m_gestureInitialRotation(GestureUnknown) , m_gestureLastRotation(GestureUnknown) #endif #if ENABLE(IOS_TOUCH_EVENTS) , m_firstTouchID(InvalidTouchIdentifier) #endif , m_mousePositionIsUnknown(true) , m_mouseDownTimestamp(0) , m_recentWheelEventDeltaTracker(adoptPtr(new WheelEventDeltaTracker)) , m_widgetIsLatched(false) #if PLATFORM(MAC) , m_mouseDownView(nil) , m_sendingEventToSubview(false) #if !PLATFORM(IOS) , m_activationEventNumber(-1) #endif // !PLATFORM(IOS) #endif #if ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS) , m_originatingTouchPointTargetKey(0) , m_touchPressed(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(); #if ENABLE(CURSOR_SUPPORT) m_cursorUpdateTimer.stop(); #endif m_fakeMouseMoveEventTimer.stop(); #if ENABLE(CURSOR_VISIBILITY) cancelAutoHideCursorTimer(); #endif m_resizeLayer = 0; m_elementUnderMouse = nullptr; m_lastElementUnderMouse = nullptr; m_instanceUnderMouse = 0; m_lastInstanceUnderMouse = 0; m_lastMouseMoveEventSubframe = 0; m_lastScrollbarUnderMouse = 0; m_clickCount = 0; m_clickNode = 0; #if ENABLE(IOS_GESTURE_EVENTS) m_gestureInitialDiameter = GestureUnknown; m_gestureLastDiameter = GestureUnknown; m_gestureInitialRotation = GestureUnknown; m_gestureLastRotation = GestureUnknown; m_gestureTargets.clear(); #endif #if ENABLE(IOS_TOUCH_EVENTS) m_touches.clear(); m_firstTouchID = InvalidTouchIdentifier; m_touchEventTargetSubframe = 0; #endif m_frameSetBeingResized = 0; #if ENABLE(DRAG_SUPPORT) m_dragTarget = 0; m_shouldOnlyFireDragOverEvent = false; #endif m_mousePositionIsUnknown = true; m_lastKnownMousePosition = IntPoint(); m_lastKnownMouseGlobalPosition = IntPoint(); m_mousePressNode = 0; m_mousePressed = false; m_capturesDragging = false; m_capturingMouseEventsElement = nullptr; m_latchedWheelEventElement = nullptr; m_previousWheelScrolledElement = nullptr; #if ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS) m_originatingTouchPointTargets.clear(); m_originatingTouchPointDocument.clear(); m_originatingTouchPointTargetKey = 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) { 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().setSelectionByMouseIfDifferent(selection, granularity); return true; } void EventHandler::selectClosestWordFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace) { Node* targetNode = result.targetNode(); VisibleSelection newSelection; if (targetNode && targetNode->renderer()) { VisiblePosition pos(targetNode->renderer()->positionForPoint(result.localPoint())); if (pos.isNotNull()) { newSelection = VisibleSelection(pos); newSelection.expandUsingGranularity(WordGranularity); } if (appendTrailingWhitespace == ShouldAppendTrailingWhitespace && newSelection.isRange()) newSelection.appendTrailingWhitespace(); updateSelectionForMouseDownDispatchingSelectStart(targetNode, expandSelectionToRespectUserSelectAll(targetNode, 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* targetNode = result.targetNode(); if (targetNode && targetNode->renderer() && m_mouseDownMayStartSelect) { VisibleSelection newSelection; Element* URLElement = result.hitTestResult().URLElement(); VisiblePosition pos(targetNode->renderer()->positionForPoint(result.localPoint())); if (pos.isNotNull() && pos.deepEquivalent().deprecatedNode()->isDescendantOf(URLElement)) newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement); updateSelectionForMouseDownDispatchingSelectStart(targetNode, expandSelectionToRespectUserSelectAll(targetNode, newSelection), WordGranularity); } } bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event) { if (event.event().button() != LeftButton) return false; if (m_frame.selection().isRange()) // A double-click when range is already selected // should not change the selection. So, do not call // selectClosestWordFromMouseEvent, but do set // m_beganSelectingText to prevent handleMouseReleaseEvent // from setting caret selection. m_selectionInitiationState = ExtendedSelection; else selectClosestWordFromMouseEvent(event); return true; } bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event) { if (event.event().button() != LeftButton) return false; Node* targetNode = event.targetNode(); if (!(targetNode && targetNode->renderer() && m_mouseDownMayStartSelect)) return false; VisibleSelection newSelection; VisiblePosition pos(targetNode->renderer()->positionForPoint(event.localPoint())); if (pos.isNotNull()) { newSelection = VisibleSelection(pos); newSelection.expandUsingGranularity(ParagraphGranularity); } return updateSelectionForMouseDownDispatchingSelectStart(targetNode, expandSelectionToRespectUserSelectAll(targetNode, newSelection), ParagraphGranularity); } static int textDistance(const Position& start, const Position& end) { RefPtr 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* targetNode = event.targetNode(); if (!(targetNode && targetNode->renderer() && m_mouseDownMayStartSelect)) return false; // Extend the selection if the Shift key is down, unless the click is in a link. bool extendSelection = event.event().shiftKey() && !event.isOverLink(); // Don't restart the selection when the mouse is pressed on an // existing selection so we can allow for text dragging. if (FrameView* view = m_frame.view()) { LayoutPoint vPoint = view->windowToContents(event.event().position()); if (!extendSelection && m_frame.selection().contains(vPoint)) { m_mouseDownWasSingleClickInSelection = true; return false; } } VisiblePosition visiblePos(targetNode->renderer()->positionForPoint(event.localPoint())); if (visiblePos.isNull()) visiblePos = VisiblePosition(firstPositionInOrBeforeNode(targetNode), DOWNSTREAM); Position pos = visiblePos.deepEquivalent(); VisibleSelection newSelection = m_frame.selection().selection(); TextGranularity granularity = CharacterGranularity; if (extendSelection && newSelection.isCaretOrRange()) { VisibleSelection selectionInUserSelectAll = expandSelectionToRespectUserSelectAll(targetNode, 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()) { // See REGRESSION (Mail): shift-click deselects when selection // was created right-to-left Position start = newSelection.start(); Position end = newSelection.end(); int distanceToStart = textDistance(start, pos); int distanceToEnd = textDistance(pos, end); if (distanceToStart <= distanceToEnd) newSelection = VisibleSelection(end, pos); else newSelection = VisibleSelection(start, pos); } else newSelection.setExtent(pos); if (m_frame.selection().granularity() != CharacterGranularity) { granularity = m_frame.selection().granularity(); newSelection.expandUsingGranularity(m_frame.selection().granularity()); } } else newSelection = expandSelectionToRespectUserSelectAll(targetNode, visiblePos); bool handled = updateSelectionForMouseDownDispatchingSelectStart(targetNode, newSelection, granularity); if (event.event().button() == MiddleButton) { // Ignore handled, since we want to paste to where the caret was placed anyway. 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) // Reset drag state. 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; // If we got the event back, that must mean it wasn't prevented, // so it's allowed to start a drag or selection if it wasn't in a scrollbar. m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode()) && !event.scrollbar(); #if ENABLE(DRAG_SUPPORT) // Careful that the drag starting logic stays in sync with eventMayStartDrag() m_mouseDownMayStartDrag = singleClick; #endif m_mouseDownWasSingleClickInSelection = false; m_mouseDown = event.event(); if (event.isOverWidget() && passWidgetMouseDownEventToWidget(event)) return true; if (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; } } // We don't do this at the start of mouse down handling, // because we don't want to do it until we know we didn't hit a widget. if (singleClick) focusDocumentView(); m_mousePressNode = event.targetNode(); #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) { Element* parent = targetNode->parentOrShadowHostElement(); 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 { // This is a pre-flight check of whether the event might lead to a drag being started. Be careful // that its logic needs to stay in sync with handleMouseMoveEvent() and the way we setMouseDownMayStartDrag // in handleMousePressEvent if (!m_frame.contentRenderer() || !m_frame.contentRenderer()->hasLayer()) return false; if (event.button() != LeftButton || event.clickCount() != 1) return false; 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); // Don't modify the selection if we're not on a node. if (targetPosition.isNull()) return; // Restart the selection if this is the first mouse move. This work is usually // done in handleMousePressEvent, but not if the mouse press was on an existing selection. VisibleSelection newSelection = m_frame.selection().selection(); // Special case to limit selection to the containing block for SVG text. // FIXME: Isn't there a better non-SVG-specific way to do this? if (Node* selectionBaseNode = newSelection.base().deprecatedNode()) if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer()) if (selectionBaseRenderer->isSVGText()) if (target->renderer()->containingBlock() != selectionBaseRenderer->containingBlock()) return; if (m_selectionInitiationState == HaveNotStartedSelection && !dispatchSelectStart(target)) return; if (m_selectionInitiationState != ExtendedSelection) { // Always extend selection here because it's caused by a mouse drag 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 { // Reset base for user select all when base is inside user-select-all area and extent < base. 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().setSelectionByMouseIfDifferent(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; // If this was the first click in the window, we don't even want to clear the selection. // This case occurs when the user clicks on a draggable element, since we have to process // the mouse down and drag events to see if we might start a drag. For other first clicks // in a window, we just don't acceptFirstMouse, and the whole down-drag-up sequence gets // ignored upstream of this layer. return eventActivatedView(event.event()); } bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event) { if (autoscrollInProgress()) stopAutoscrollTimer(); if (handleMouseUp(event)) return true; // Used to prevent mouseMoveEvent from initiating a drag before // the mouse is pressed again. m_mousePressed = false; m_capturesDragging = false; #if ENABLE(DRAG_SUPPORT) m_mouseDownMayStartDrag = false; #endif m_mouseDownMayStartSelect = false; m_mouseDownMayStartAutoscroll = false; m_mouseDownWasInSubframe = false; bool handled = false; // Clear the selection if the mouse didn't move after the last mouse // press and it's not a context menu click. We do this so when clicking // on the selection, the selection goes away. However, if we are // editing, place the caret. if (m_mouseDownWasSingleClickInSelection && m_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().caretBrowsingEnabled(); if (node && node->renderer() && (caretBrowsing || node->hasEditableStyle())) { VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint()); newSelection = VisibleSelection(pos); } setSelectionIfNeeded(m_frame.selection(), newSelection); handled = true; } if (event.event().button() == MiddleButton) { // Ignore handled, since we want to paste to where the caret was placed anyway. 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(RenderElement* renderer) { #if !PLATFORM(IOS) if (!renderer->isBox()) return; m_autoscrollController->startPanScrolling(toRenderBox(renderer), lastKnownMousePosition()); invalidateClick(); #endif } #endif // ENABLE(PAN_SCROLLING) RenderBox* 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 { 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) { // We always send hitTestResultAtPoint to the main frame if we have one, // otherwise we might hit areas that are obscured by higher frames. if (!m_frame.isMainFrame()) { Frame& mainFrame = 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; // hitTestResultAtPoint is specifically used to hitTest into all frames, thus it always allows child frame content. 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) { 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) { auto 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) { auto r = node->renderer(); if (r && !r->isListBox() && r->enclosingBox()->logicalScroll(direction, granularity)) { setFrameWasScrolledByUser(); return true; } } return false; } bool EventHandler::scrollRecursively(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode) { // The layout needs to be up to date to determine if we can scroll. We may be // here because of an onLoad event, in which case the final layout hasn't been performed yet. m_frame.document()->updateLayoutIgnorePendingStylesheets(); if (scrollOverflow(direction, granularity, startingNode)) return true; Frame* frame = &m_frame; FrameView* view = frame->view(); if (view && view->scroll(direction, granularity)) return true; frame = frame->tree().parent(); if (!frame) return false; return frame->eventHandler().scrollRecursively(direction, granularity, m_frame.ownerElement()); } bool EventHandler::logicalScrollRecursively(ScrollLogicalDirection direction, ScrollGranularity granularity, Node* startingNode) { // The layout needs to be up to date to determine if we can scroll. We may be // here because of an onLoad event, in which case the final layout hasn't been performed yet. m_frame.document()->updateLayoutIgnorePendingStylesheets(); if (logicalScrollOverflow(direction, granularity, startingNode)) return true; Frame* frame = &m_frame; FrameView* view = frame->view(); bool scrolled = false; #if PLATFORM(MAC) // Mac also resets the scroll position in the inline direction. if (granularity == ScrollByDocument && view && view->logicalScroll(ScrollInlineDirectionBackward, ScrollByDocument)) scrolled = true; #endif if (view && view->logicalScroll(direction, granularity)) scrolled = true; if (scrolled) return true; frame = frame->tree().parent(); if (!frame) return false; return frame->eventHandler().logicalScrollRecursively(direction, granularity, m_frame.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; auto renderer = node->renderer(); if (!renderer || !renderer->isWidget()) return 0; Widget* widget = toRenderWidget(renderer)->widget(); if (!widget || !widget->isFrameView()) return 0; return &toFrameView(widget)->frame(); } #if ENABLE(CURSOR_SUPPORT) static bool isSubmitImage(Node* node) { return node && isHTMLInputElement(node) && toHTMLInputElement(node)->isImageButton(); } // Returns true if the node's editable block is not current focused for editing static bool nodeIsNotBeingEdited(const Node& node, const Frame& frame) { return frame.selection().selection().rootEditableElement() != node.rootEditableElement(); } bool EventHandler::useHandCursor(Node* node, bool isOverLink, bool shiftKey) { if (!node) return false; bool editable = node->hasEditableStyle(); bool editableLinkEnabled = false; // If the link is editable, then we need to check the settings to see whether or not the link should be followed if (editable) { 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&) { 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; if (!m_frame.page()) return NoCursorChange; #if ENABLE(PAN_SCROLLING) if (m_frame.mainFrame().eventHandler().panScrollInProgress()) return NoCursorChange; #endif Node* node = result.targetNode(); if (!node) return NoCursorChange; auto renderer = node->renderer(); RenderStyle* style = renderer ? &renderer->style() : nullptr; 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 (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(); // Get hotspot and convert from logical pixels to physical pixels. IntPoint hotSpot = (*cursors)[i].hotSpot(); hotSpot.scale(scale, scale); IntSize size = cachedImage->imageForRenderer(renderer)->size(); if (cachedImage->errorOccurred()) continue; // Limit the size of cursors (in UI pixels) so that they cannot be // used to cover UI elements in chrome. size.scale(1 / scale); if (size.width() > maximumCursorSize || size.height() > maximumCursorSize) continue; Image* image = cachedImage->imageForRenderer(renderer); #if ENABLE(MOUSE_CURSOR_SCALE) // Ensure no overflow possible in calculations above. 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->hasEditableStyle(); 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()))); } } // During selection, use an I-beam regardless of the content beneath the cursor when cursor style is not explicitly specified. // If a drag may be starting or we're capturing mouse events for a particular node, don't treat this as a selection. if (m_mousePressed && m_mouseDownMayStartSelect #if ENABLE(DRAG_SUPPORT) && !m_mouseDownMayStartDrag #endif && m_frame.selection().isCaretOrRange() && !m_capturingMouseEventsElement) { return iBeam; } 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(); } #endif // ENABLE(CURSOR_SUPPORT) #if ENABLE(CURSOR_VISIBILITY) void EventHandler::startAutoHideCursorTimer() { Page* page = m_frame.page(); if (!page) return; m_autoHideCursorTimer.startOneShot(page->settings().timeWithoutMouseMovementBeforeHidingControls()); // The fake mouse move event screws up the auto-hide feature (by resetting the auto-hide timer) // so cancel any pending fake mouse moves. if (m_fakeMouseMoveEventTimer.isActive()) m_fakeMouseMoveEventTimer.stop(); } void EventHandler::cancelAutoHideCursorTimer() { if (m_autoHideCursorTimer.isActive()) m_autoHideCursorTimer.stop(); } void EventHandler::autoHideCursorTimerFired(Timer& 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(); // FIXME: Is it really OK to use the wrong coordinates here when view is 0? // Historically the code would just crash; this is clearly no worse than that. return view ? view->windowToContents(windowPoint) : windowPoint; } bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent) { RefPtr 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); // FIXME (bug 68185): this call should be made at another abstraction layer 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); // Save the document point we generate in case the window coordinate is invalidated by what happens // when we dispatch the event. 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 subframe = subframeForHitTestResult(mev); if (subframe && passMousePressEventToSubframe(mev, subframe.get())) { // Start capturing future events for this frame. We only do this if we didn't clear // the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop. m_capturesDragging = subframe->eventHandler().capturesDragging(); if (m_mousePressed && m_capturesDragging) { m_capturingMouseEventsElement = subframe->ownerElement(); m_eventHandlerWillResetCapturingMouseEventsElement = true; } invalidateClick(); return true; } #if ENABLE(PAN_SCROLLING) // We store whether pan scrolling is in progress before calling stopAutoscrollTimer() // because it will set m_autoscrollType to NoAutoscroll on return. bool isPanScrollInProgress = m_frame.mainFrame().eventHandler().panScrollInProgress(); stopAutoscrollTimer(); if (isPanScrollInProgress) { // We invalidate the click when exiting pan scrolling so that we don't inadvertently navigate // away from the current page (e.g. the click was on a hyperlink). See . invalidateClick(); return true; } #endif m_clickCount = mouseEvent.clickCount(); m_clickNode = mev.targetNode(); if (!m_clickNode) { invalidateClick(); return false; } 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 the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults // in case the scrollbar widget was destroyed when the mouse event was handled. if (mev.scrollbar()) { const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get(); HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::DisallowShadowContent); mev = m_frame.document()->prepareMouseEvent(request, documentPoint, mouseEvent); if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get()) m_lastScrollbarUnderMouse = 0; } if (swallowEvent) { // scrollbars should get events anyway, even disabled controls might be scrollable Scrollbar* scrollbar = mev.scrollbar(); updateLastScrollbarUnderMouse(scrollbar, true); if (scrollbar) passMousePressEventToScrollbar(mev, scrollbar); } else { // Refetch the event target node if it currently is the shadow node inside an element. // If a mouse event handler changes the input element type to one that has a widget associated, // we'd like to EventHandler::handleMousePressEvent to pass the event to the widget and thus the // event target node can't still be the shadow node. if (mev.targetNode()->isShadowRoot() && isHTMLInputElement(toShadowRoot(mev.targetNode())->hostElement())) { 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; } // This method only exists for platforms that don't know how to deliver bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent) { RefPtr protector(m_frame.view()); m_frame.selection().setCaretBlinkingSuspended(false); UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); // We get this instead of a second mouse-up m_mousePressed = false; setLastKnownMousePosition(mouseEvent); HitTestRequest request(HitTestRequest::Active | HitTestRequest::DisallowShadowContent); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); Frame* subframe = subframeForHitTestResult(mev); if (m_eventHandlerWillResetCapturingMouseEventsElement) m_capturingMouseEventsElement = nullptr; 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; auto renderer = node->renderer(); if (!renderer) return 0; RenderLayer* layer = renderer->enclosingLayer(); if (!layer) return 0; return layer; } bool EventHandler::mouseMoved(const PlatformMouseEvent& event) { RefPtr 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) { #if ENABLE(TOUCH_EVENTS) bool defaultPrevented = dispatchSyntheticTouchEventIfEnabled(mouseEvent); if (defaultPrevented) return true; #endif RefPtr protector(m_frame.view()); setLastKnownMousePosition(mouseEvent); if (m_hoverTimer.isActive()) m_hoverTimer.stop(); #if ENABLE(CURSOR_SUPPORT) m_cursorUpdateTimer.stop(); #endif cancelFakeMouseMoveEvent(); if (m_svgPan) { toSVGDocument(m_frame.document())->updatePan(m_frame.view()->windowToContents(m_lastKnownMousePosition)); return true; } if (m_frameSetBeingResized) return !dispatchMouseEvent(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false); // On iOS, our scrollbars are managed by UIKit. #if !PLATFORM(IOS) // Send events right to a scrollbar if the mouse is pressed. if (m_lastScrollbarUnderMouse && m_mousePressed) return m_lastScrollbarUnderMouse->mouseMoved(mouseEvent); #endif HitTestRequest::HitTestRequestType hitType = HitTestRequest::Move | HitTestRequest::DisallowShadowContent | HitTestRequest::AllowFrameScrollbars; if (m_mousePressed) hitType |= HitTestRequest::Active; else if (onlyUpdateScrollbars) { // Mouse events should be treated as "read-only" if we're updating only scrollbars. This // means that :hover and :active freeze in the state they were in, rather than updating // for nodes the mouse moves while the window is not key (which will be the case if // onlyUpdateScrollbars is true). hitType |= HitTestRequest::ReadOnly; } #if ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS) // Treat any mouse move events as readonly if the user is currently touching the screen. if (m_touchPressed) hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly; #endif HitTestRequest request(hitType); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); if (hoveredNode) *hoveredNode = mev.hitTestResult(); if (m_resizeLayer && m_resizeLayer->inResizeMode()) m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner); else { Scrollbar* scrollbar = mev.scrollbar(); updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed); // On iOS, our scrollbars are managed by UIKit. #if !PLATFORM(IOS) if (!m_mousePressed && scrollbar) scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering. #endif if (onlyUpdateScrollbars) return true; } bool swallowEvent = false; RefPtr newSubframe = m_capturingMouseEventsElement.get() ? subframeForTargetNode(m_capturingMouseEventsElement.get()) : subframeForHitTestResult(mev); // We want mouseouts to happen first, from the inside out. First send a move event to the last subframe so that it will fire mouseouts. if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree().isDescendantOf(&m_frame) && m_lastMouseMoveEventSubframe != newSubframe) passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get()); if (newSubframe) { // Update over/out state before passing the event to the subframe. updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true); // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target // node to be detached from its FrameView, in which case the event should not be passed. if (newSubframe->view()) swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode); #if ENABLE(CURSOR_SUPPORT) } 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); } } #endif } 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; // FIXME: When an element in UA ShadowDOM (e.g. inner element in ) is clicked, // we assume that the host element is clicked. This is necessary for implementing etc. // However, we should not check ShadowRoot type basically. // https://bugs.webkit.org/show_bug.cgi?id=108047 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 protector(m_frame.view()); m_frame.selection().setCaretBlinkingSuspended(false); #if ENABLE(TOUCH_EVENTS) bool defaultPrevented = dispatchSyntheticTouchEventIfEnabled(mouseEvent); if (defaultPrevented) return true; #endif UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); #if ENABLE(PAN_SCROLLING) m_autoscrollController->handleMouseReleaseEvent(mouseEvent); #endif m_mousePressed = false; setLastKnownMousePosition(mouseEvent); if (m_svgPan) { m_svgPan = false; toSVGDocument(m_frame.document())->updatePan(m_frame.view()->windowToContents(m_lastKnownMousePosition)); return true; } 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_lastElementUnderMouse.get(), cancelable, m_clickCount, mouseEvent, setUnder); } HitTestRequest request(HitTestRequest::Release | HitTestRequest::DisallowShadowContent); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); Frame* subframe = m_capturingMouseEventsElement.get() ? subframeForTargetNode(m_capturingMouseEventsElement.get()) : subframeForHitTestResult(mev); if (m_eventHandlerWillResetCapturingMouseEventsElement) m_capturingMouseEventsElement = nullptr; 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 the event was a middle click, attempt to copy global selection in after // the newly set caret position. // // This code is called from either the mouse up or mouse down handling. There // is some debate about when the global selection is pasted: // xterm: pastes on up. // GTK: pastes on down. // Qt: pastes on up. // Firefox: pastes on up. // Chromium: pastes on up. // // There is something of a webcompat angle to this well, as highlighted by // crbug.com/14608. Pages can clear text boxes 'onclick' and, if we paste on // down then the text is pasted just before the onclick handler runs and // clears the text box. So it's important this happens after the event // handlers have been fired. #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(); // Do not paste here if the focus was moved somewhere else. 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, Element& dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard) { FrameView* view = m_frame.view(); // FIXME: We might want to dispatch a dragleave even if the view is gone. if (!view) return false; view->disableLayerFlushThrottlingTemporarilyForInteraction(); RefPtr me = MouseEvent::create(eventType, true, true, event.timestamp(), 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 = toHTMLFrameElementBase(target)->contentFrame(); return true; } static DragOperation convertDropZoneOperationToDragOperation(const String& dragOperation) { if (dragOperation == "copy") return DragOperationCopy; if (dragOperation == "move") return DragOperationMove; if (dragOperation == "link") return DragOperationLink; return DragOperationNone; } static String convertDragOperationToDropZoneOperation(DragOperation operation) { switch (operation) { case DragOperationCopy: return ASCIILiteral("copy"); case DragOperationMove: return ASCIILiteral("move"); case DragOperationLink: return ASCIILiteral("link"); default: return ASCIILiteral("copy"); } } static inline bool hasFileOfType(Clipboard& clipboard, const String& type) { RefPtr fileList = clipboard.files(); for (unsigned i = 0; i < fileList->length(); i++) { if (equalIgnoringCase(fileList->item(i)->type(), type)) return true; } return false; } static inline bool hasStringOfType(Clipboard& clipboard, const String& type) { return !type.isNull() && clipboard.types().contains(type); } static bool hasDropZoneType(Clipboard& clipboard, const String& keyword) { if (keyword.startsWith("file:")) return hasFileOfType(clipboard, keyword.substring(5)); if (keyword.startsWith("string:")) return hasStringOfType(clipboard, keyword.substring(7)); return false; } 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 = dropZoneStr.lower(); SpaceSplitString keywords(dropZoneStr, false); if (keywords.isEmpty()) 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 || hasDropZoneType(*clipboard, 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 newTarget; if (Node* targetNode = mev.targetNode()) { // Drag events should never go to non-element nodes (following IE, and proper mouseover/out dispatch) if (!targetNode->isElementNode()) newTarget = targetNode->parentOrShadowHostElement(); else newTarget = toElement(targetNode); } m_autoscrollController->updateDragAndDrop(newTarget.get(), event.position(), event.timestamp()); if (m_dragTarget != newTarget) { // FIXME: this ordering was explicitly chosen to match WinIE. However, // it is sometimes incorrect when dragging within subframes, as seen with // LayoutTests/fast/events/drag-in-frames.html. // // Moreover, this ordering conforms to section 7.9.4 of the HTML 5 spec. . Frame* targetFrame; if (targetIsFrame(newTarget.get(), targetFrame)) { if (targetFrame) accept = targetFrame->eventHandler().updateDragAndDrop(event, clipboard); } else if (newTarget) { // As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event. if (dragState().source && dragState().shouldDispatchEvents) { // for now we don't care if event handler cancels default behavior, since there is none dispatchDragSrcEvent(eventNames().dragEvent, event); } accept = dispatchDragEvent(eventNames().dragenterEvent, *newTarget, event, clipboard); if (!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, event, clipboard); if (newTarget) { // We do not explicitly call dispatchDragEvent here because it could ultimately result in the appearance that // two dragover events fired. So, we mark that we should only fire a dragover event on the next call to this function. m_shouldOnlyFireDragOverEvent = true; } } else { Frame* targetFrame; if (targetIsFrame(newTarget.get(), targetFrame)) { if (targetFrame) accept = targetFrame->eventHandler().updateDragAndDrop(event, clipboard); } else if (newTarget) { // Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier. if (!m_shouldOnlyFireDragOverEvent && dragState().source && dragState().shouldDispatchEvents) { // for now we don't care if event handler cancels default behavior, since there is none dispatchDragSrcEvent(eventNames().dragEvent, event); } accept = dispatchDragEvent(eventNames().dragoverEvent, *newTarget, event, clipboard); if (!accept) accept = findDropZone(newTarget.get(), clipboard); m_shouldOnlyFireDragOverEvent = false; } } m_dragTarget = newTarget.release(); 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) { if (dragState().source && dragState().shouldDispatchEvents) dispatchDragSrcEvent(eventNames().dragEvent, event); dispatchDragEvent(eventNames().dragleaveEvent, *m_dragTarget, 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) preventedDefault = dispatchDragEvent(eventNames().dropEvent, *m_dragTarget, event, clipboard); clearDragState(); return preventedDefault; } void EventHandler::clearDragState() { stopAutoscrollTimer(); m_dragTarget = nullptr; m_capturingMouseEventsElement = nullptr; m_shouldOnlyFireDragOverEvent = false; #if PLATFORM(MAC) m_sendingEventToSubview = false; #endif } #endif // ENABLE(DRAG_SUPPORT) void EventHandler::setCapturingMouseEventsElement(PassRefPtr element) { m_capturingMouseEventsElement = element; m_eventHandlerWillResetCapturingMouseEventsElement = false; } MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev) { ASSERT(m_frame.document()); return m_frame.document()->prepareMouseEvent(request, documentPointForWindowPoint(m_frame, mev.position()), mev); } static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode) { if (!referenceNode || !referenceNode->isSVGElement()) return 0; ShadowRoot* shadowRoot = referenceNode->containingShadowRoot(); if (!shadowRoot) return 0; Element* shadowTreeParentElement = shadowRoot->hostElement(); if (!shadowTreeParentElement || !shadowTreeParentElement->hasTagName(useTag)) return 0; return toSVGUseElement(shadowTreeParentElement)->instanceForShadowTreeElement(referenceNode); } void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut) { Element* targetElement = nullptr; // If we're capturing, we always go right to that element. if (m_capturingMouseEventsElement) targetElement = m_capturingMouseEventsElement.get(); else if (targetNode) { // If the target node is a non-element, dispatch on the parent. if (!targetNode->isElementNode()) targetElement = targetNode->parentOrShadowHostElement(); else targetElement = toElement(targetNode); } m_elementUnderMouse = targetElement; m_instanceUnderMouse = instanceAssociatedWithShadowTreeElement(targetElement); // shadow tree elements may have been recloned, update node under mouse in any case if (m_lastInstanceUnderMouse) { SVGElement* lastCorrespondingElement = m_lastInstanceUnderMouse->correspondingElement(); SVGElement* lastCorrespondingUseElement = m_lastInstanceUnderMouse->correspondingUseElement(); if (lastCorrespondingElement && lastCorrespondingUseElement) { HashSet instances = lastCorrespondingElement->instancesForElement(); // Locate the recloned shadow tree element for our corresponding instance HashSet::iterator end = instances.end(); for (HashSet::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_lastElementUnderMouse == shadowTreeElement) continue; m_lastElementUnderMouse = shadowTreeElement; m_lastInstanceUnderMouse = instance; break; } } } // Fire mouseout/mouseover if the mouse has shifted to a different node. if (fireMouseOverOut) { RenderLayer* layerForLastNode = layerForNode(m_lastElementUnderMouse.get()); RenderLayer* layerForNodeUnderMouse = layerForNode(m_elementUnderMouse.get()); Page* page = m_frame.page(); if (m_lastElementUnderMouse && (!m_elementUnderMouse || &m_elementUnderMouse->document() != m_frame.document())) { // The mouse has moved between frames. if (Frame* frame = m_lastElementUnderMouse->document().frame()) { if (FrameView* frameView = frame->view()) frameView->mouseExitedContentArea(); } } else if (page && (layerForLastNode && (!layerForNodeUnderMouse || layerForNodeUnderMouse != layerForLastNode))) { // The mouse has moved between layers. if (Frame* frame = m_lastElementUnderMouse->document().frame()) { if (FrameView* frameView = frame->view()) { if (frameView->containsScrollableArea(layerForLastNode)) layerForLastNode->mouseExitedContentArea(); } } } if (m_elementUnderMouse && (!m_lastElementUnderMouse || &m_lastElementUnderMouse->document() != m_frame.document())) { // The mouse has moved between frames. if (Frame* frame = m_elementUnderMouse->document().frame()) { if (FrameView* frameView = frame->view()) frameView->mouseEnteredContentArea(); } } else if (page && (layerForNodeUnderMouse && (!layerForLastNode || layerForNodeUnderMouse != layerForLastNode))) { // The mouse has moved between layers. if (Frame* frame = m_elementUnderMouse->document().frame()) { if (FrameView* frameView = frame->view()) { if (frameView->containsScrollableArea(layerForNodeUnderMouse)) layerForNodeUnderMouse->mouseEnteredContentArea(); } } } if (m_lastElementUnderMouse && &m_lastElementUnderMouse->document() != m_frame.document()) { m_lastElementUnderMouse = nullptr; m_lastScrollbarUnderMouse = 0; m_lastInstanceUnderMouse = 0; } if (m_lastElementUnderMouse != m_elementUnderMouse) { // send mouseout event to the old node if (m_lastElementUnderMouse) m_lastElementUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoutEvent, 0, m_elementUnderMouse.get()); // send mouseover event to the new node if (m_elementUnderMouse) m_elementUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoverEvent, 0, m_lastElementUnderMouse.get()); } m_lastElementUnderMouse = m_elementUnderMouse; m_lastInstanceUnderMouse = instanceAssociatedWithShadowTreeElement(m_elementUnderMouse.get()); } } bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, bool /*cancelable*/, int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder) { if (FrameView* view = m_frame.view()) view->disableLayerFlushThrottlingTemporarilyForInteraction(); updateMouseEventTargetNode(targetNode, mouseEvent, setUnder); bool swallowEvent = false; if (m_elementUnderMouse) swallowEvent = !(m_elementUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount)); if (!swallowEvent && eventType == eventNames().mousedownEvent) { // If clicking on a frame scrollbar, do not mess up with content focus. if (FrameView* view = m_frame.view()) { if (view->scrollbarAtPoint(mouseEvent.position())) return true; } // The layout needs to be up to date to determine if an element is focusable. m_frame.document()->updateLayoutIgnorePendingStylesheets(); // Blur current focus node when a link/button is clicked; this // is expected by some sites that rely on onChange handlers running // from form fields before the button click is processed. Element* element = m_elementUnderMouse.get(); // Walk up the DOM tree to search for an element to focus. while (element) { if (element->isMouseFocusable()) { // To fix Can't drag selected ToDo, we don't focus a // node on mouse down if it's selected and inside a focused node. It will be // focused if the user does a mouseup over it, however, because the mouseup // will set a selection inside it, which will call setFocuseNodeIfNeeded. 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(); } // Only change the focus when clicking scrollbars if it can transfered to a mouse focusable node. if ((!element || !element->isMouseFocusable()) && isInsideScrollbar(mouseEvent.position())) return false; // If focus shift is blocked, we eat the event. Note we should never clear swallowEvent // if the page already set it (e.g., by canceling default behavior). if (Page* page = m_frame.page()) { if (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 bool EventHandler::handleWheelEvent(const PlatformWheelEvent& e) { Document* document = m_frame.document(); if (!document->renderView()) return false; RefPtr 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); document->renderView()->hitTest(request, result); bool useLatchedWheelEventElement = e.useLatchedEventElement(); Element* element = result.innerElement(); bool isOverWidget; if (useLatchedWheelEventElement) { if (!m_latchedWheelEventElement) { m_latchedWheelEventElement = element; m_widgetIsLatched = result.isOverWidget(); } else element = m_latchedWheelEventElement.get(); isOverWidget = m_widgetIsLatched; } else { if (m_latchedWheelEventElement) m_latchedWheelEventElement = nullptr; if (m_previousWheelScrolledElement) m_previousWheelScrolledElement = nullptr; isOverWidget = result.isOverWidget(); } // FIXME: It should not be necessary to do this mutation here. // Instead, the handlers should know convert vertical scrolls // appropriately. PlatformWheelEvent event = e; if (m_baseEventType == PlatformEvent::NoType && shouldTurnVerticalTicksIntoHorizontal(result, e)) event = event.copyTurningVerticalTicksIntoHorizontalTicks(); #if PLATFORM(MAC) switch (event.phase()) { case PlatformWheelEventPhaseBegan: m_recentWheelEventDeltaTracker->beginTrackingDeltas(); break; case PlatformWheelEventPhaseEnded: m_recentWheelEventDeltaTracker->endTrackingDeltas(); break; default: break; } #endif m_recentWheelEventDeltaTracker->recordWheelEventDelta(event); if (element) { // Figure out which view to send the event to. RenderElement* target = element->renderer(); if (isOverWidget && target && target->isWidget()) { Widget* widget = toRenderWidget(target)->widget(); if (widget && passWheelEventToWidget(e, widget)) { m_isHandlingWheelEvent = false; return true; } } if (!element->dispatchWheelEvent(event)) { m_isHandlingWheelEvent = false; return true; } } // We do another check on the frame view because the event handler can run JS which results in the frame getting destroyed. view = m_frame.view(); #if PLATFORM(MAC) if (useLatchedWheelEventElement && m_latchedWheelEventElement == element) { bool enclosingFrameIsMainFrame = view ? view->frame().isMainFrame() : false; // If we are latched, and have nowhere to scroll, treat the scroll event as ended so that we don't // cause the scroll to break free of the current scrolling widget. if (!enclosingFrameIsMainFrame) { bool didHandleWheelEvent = view ? view->wheelEvent(event) : false; if (!didHandleWheelEvent) { // If we are just starting a scroll event, and have nowhere left to scroll, allow // the enclosing frame to handle the scroll. didHandleWheelEvent = !m_recentWheelEventDeltaTracker->isFirstWheelEvent(); } m_isHandlingWheelEvent = false; return didHandleWheelEvent; } if (!m_recentWheelEventDeltaTracker->isFirstWheelEvent()) { // When the main frame is our parent, and we have been scrolling within this region, we do not // want to have the main frame consume any remaining scroll events. Keep them latched to this // element. m_isHandlingWheelEvent = false; return true; } } #endif bool didHandleEvent = view ? view->wheelEvent(event) : false; m_isHandlingWheelEvent = false; return didHandleEvent; } void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent) { if (!startNode || !wheelEvent) return; Element* stopElement = m_previousWheelScrolledElement.get(); ScrollGranularity granularity = wheelGranularityToScrollGranularity(wheelEvent->deltaMode()); DominantScrollGestureDirection dominantDirection = DominantScrollGestureDirection::None; // Workaround for scrolling issues . #if PLATFORM(MAC) if (m_recentWheelEventDeltaTracker->isTrackingDeltas()) dominantDirection = m_recentWheelEventDeltaTracker->dominantScrollGestureDirection(); #endif // Break up into two scrolls if we need to. Diagonal movement on // a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set). if (dominantDirection != DominantScrollGestureDirection::Vertical && scrollNode(wheelEvent->deltaX(), granularity, ScrollRight, ScrollLeft, startNode, &stopElement, roundedIntPoint(wheelEvent->absoluteLocation()))) wheelEvent->setDefaultHandled(); if (dominantDirection != DominantScrollGestureDirection::Horizontal && scrollNode(wheelEvent->deltaY(), granularity, ScrollDown, ScrollUp, startNode, &stopElement, roundedIntPoint(wheelEvent->absoluteLocation()))) wheelEvent->setDefaultHandled(); if (!m_latchedWheelEventElement) m_previousWheelScrolledElement = stopElement; } #if ENABLE(CONTEXT_MENUS) bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event) { Document* doc = m_frame.document(); FrameView* v = m_frame.view(); if (!v) return false; // Clear mouse press state to avoid initiating a drag while context menu is up. 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() // FIXME: In the editable case, word selection sometimes selects content that isn't underneath the mouse. // If the selection is non-editable, we do word selection to make it easier to use the contextual menu items // available for text selections. But only if we're above text. && (m_frame.selection().selection().isContentEditable() || (mev.targetNode() && mev.targetNode()->isTextNode()))) { m_mouseDownMayStartSelect = true; // context menu events are always allowed to perform a selection selectClosestWordOrLinkFromMouseEvent(mev); } swallowEvent = !dispatchMouseEvent(eventNames().contextmenuEvent, mev.targetNode(), true, 0, event, false); return swallowEvent; } bool EventHandler::sendContextMenuEventForKey() { FrameView* view = m_frame.view(); if (!view) return false; Document* doc = m_frame.document(); if (!doc) return false; // Clear mouse press state to avoid initiating a drag while context menu is up. 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(); const VisibleSelection& selection = m_frame.selection().selection(); Position start = selection.start(); if (start.deprecatedNode() && (selection.rootEditableElement() || selection.isRange())) { RefPtr selectionRange = selection.toNormalizedRange(); IntRect firstRect = m_frame.editor().firstRectForRange(selectionRange.get()); int x = rightAligned ? firstRect.maxX() : firstRect.x(); // In a multiline edit, firstRect.maxY() would endup on the next line, so -1. 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; // Use the focused node as the target for hover and active. HitTestResult result(position); result.setInnerNode(targetNode); doc->updateHoverActiveState(HitTestRequest::Active | HitTestRequest::DisallowShadowContent, result.innerElement()); // The contextmenu event is a mouse event even when invoked using the keyboard. // This is required for web compatibility. #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); } #endif // ENABLE(CONTEXT_MENUS) void EventHandler::scheduleHoverStateUpdate() { if (!m_hoverTimer.isActive()) m_hoverTimer.startOneShot(0); } #if ENABLE(CURSOR_SUPPORT) void EventHandler::scheduleCursorUpdate() { if (!m_cursorUpdateTimer.isActive()) m_cursorUpdateTimer.startOneShot(cursorUpdateInterval); } #endif void EventHandler::dispatchFakeMouseMoveEventSoon() { if (m_mousePressed) return; if (m_mousePositionIsUnknown) return; if (!m_frame.settings().deviceSupportsMouse()) return; // If the content has ever taken longer than fakeMouseMoveShortInterval we // reschedule the timer and use a longer time. This will cause the content // to receive these moves only after the user is done scrolling, reducing // pauses during the scroll. 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& timer) { ASSERT_UNUSED(timer, &timer == &m_fakeMouseMoveEventTimer); ASSERT(!m_mousePressed); if (!m_frame.settings().deviceSupportsMouse()) return; FrameView* view = m_frame.view(); if (!view) return; if (!m_frame.page() || !m_frame.page()->isVisible() || !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&) { m_hoverTimer.stop(); 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) { // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do. // IE matches lower and upper case access keys regardless of Shift key state - but if both upper and // lower case variants are present in a document, the correct element is matched based on Shift key state. // Firefox only matches an access key if Shift is not pressed, and does that case-insensitively. ASSERT(!(accessKeyModifiers() & 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) || PLATFORM(IOS) 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 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 (m_frame.mainFrame().eventHandler().panScrollInProgress()) { // If a key is pressed while the panScroll is in progress then we want to stop if (initialKeyEvent.type() == PlatformEvent::KeyDown || initialKeyEvent.type() == PlatformEvent::RawKeyDown) stopAutoscrollTimer(); // If we were in panscroll mode, we swallow the key event return true; } #endif // Check for cases where we are too early for events -- possible unmatched key up // from pressing return in the location bar. RefPtr element = eventTargetElementForDocument(m_frame.document()); if (!element) return false; UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); UserTypingGestureIndicator typingGestureIndicator(m_frame); if (FrameView* view = m_frame.view()) view->disableLayerFlushThrottlingTemporarilyForInteraction(); // FIXME (bug 68185): this call should be made at another abstraction layer m_frame.loader().resetMultipleFormSubmissionProtection(); // In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match. // On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict // with access keys. Then we dispatch keydown, but suppress its default handling. // On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages. // Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events. bool matchedAnAccessKey = false; if (initialKeyEvent.type() == PlatformEvent::KeyDown) matchedAnAccessKey = handleAccessKey(initialKeyEvent); // FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch. if (initialKeyEvent.type() == PlatformEvent::KeyUp || initialKeyEvent.type() == PlatformEvent::Char) return !element->dispatchKeyEvent(initialKeyEvent); bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks(); PlatformKeyboardEvent keyDownEvent = initialKeyEvent; if (keyDownEvent.type() != PlatformEvent::RawKeyDown) keyDownEvent.disambiguateKeyDownEvent(PlatformEvent::RawKeyDown, backwardCompatibilityMode); RefPtr keydown = KeyboardEvent::create(keyDownEvent, m_frame.document()->defaultView()); if (matchedAnAccessKey) keydown->setDefaultPrevented(true); keydown->setTarget(element); if (initialKeyEvent.type() == PlatformEvent::RawKeyDown) { element->dispatchEvent(keydown, IGNORE_EXCEPTION); // If frame changed as a result of keydown dispatch, then return true to avoid sending a subsequent keypress message to the new frame. bool changedFocusedFrame = m_frame.page() && &m_frame != &m_frame.page()->focusController().focusedOrMainFrame(); return keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame; } // Run input method in advance of DOM event handling. This may result in the IM // modifying the page prior the keydown event, but this behaviour is necessary // in order to match IE: // 1. preventing default handling of keydown and keypress events has no effect on IM input; // 2. if an input method handles the event, its keyCode is set to 229 in keydown event. m_frame.editor().handleInputMethodKeydown(keydown.get()); bool handledByInputMethod = keydown->defaultHandled(); if (handledByInputMethod) { keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode); keydown = KeyboardEvent::create(keyDownEvent, m_frame.document()->defaultView()); keydown->setTarget(element); keydown->setDefaultHandled(); } element->dispatchEvent(keydown, IGNORE_EXCEPTION); // If frame changed as a result of keydown dispatch, then return early to avoid sending a subsequent keypress message to the new frame. bool changedFocusedFrame = m_frame.page() && &m_frame != &m_frame.page()->focusController().focusedOrMainFrame(); bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame; if (handledByInputMethod || (keydownResult && !backwardCompatibilityMode)) return keydownResult; // Focus may have changed during keydown handling, so refetch element. // But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original element. if (!keydownResult) { element = eventTargetElementForDocument(m_frame.document()); if (!element) return false; } PlatformKeyboardEvent keyPressEvent = initialKeyEvent; keyPressEvent.disambiguateKeyDownEvent(PlatformEvent::Char, backwardCompatibilityMode); if (keyPressEvent.text().isEmpty()) return keydownResult; RefPtr keypress = KeyboardEvent::create(keyPressEvent, m_frame.document()->defaultView()); keypress->setTarget(element); if (keydownResult) keypress->setDefaultPrevented(true); #if PLATFORM(MAC) keypress->keypressCommands() = keydown->keypressCommands(); #endif element->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) { // Send a hit test request so that RenderLayer gets a chance to update the :hover and :active pseudoclasses. HitTestRequest request(HitTestRequest::Release | HitTestRequest::DisallowShadowContent); prepareMouseEvent(request, event); if (dragState().source && dragState().shouldDispatchEvents) { dragState().clipboard->setDestinationOperation(operation); // For now we don't care if event handler cancels default behavior, since there is no default behavior. dispatchDragSrcEvent(eventNames().dragendEvent, event); } freeClipboard(); dragState().source = 0; // In case the drag was ended due to an escape key press we need to ensure // that consecutive mousemove events don't reinitiate the drag and drop. m_mouseDownMayStartDrag = false; } void EventHandler::updateDragStateAfterEditDragIfNeeded(Element* rootEditableElement) { // If inserting the dragged contents removed the drag source, we still want to fire dragend at the root editable element. if (dragState().source && !dragState().source->inDocument()) dragState().source = rootEditableElement; } // Return value indicates if we should continue "default processing", i.e., whether event handler canceled. bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event) { return !dispatchDragEvent(eventType, *dragState().source, 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) { // If we allowed the other side of the bridge to handle a drag // last time, then m_mousePressed might still be set. So we // clear it now to make sure the next move after a drag // doesn't look like a drag. m_mousePressed = false; return false; } if (eventLoopHandleMouseDragged(event)) return true; // Careful that the drag starting logic stays in sync with eventMayStartDrag() if (m_mouseDownMayStartDrag && !dragState().source) { dragState().shouldDispatchEvents = (updateDragSourceActionsAllowed() & DragSourceActionDHTML); // try to find an element that wants to be dragged 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; // no element is draggable else m_dragMayStartSelectionInstead = (dragState().type & DragSourceActionSelection); } // For drags starting in the selection, the user must wait between the mousedown and mousedrag, // or else we bail on the dragging stuff and allow selection to occur if (m_mouseDownMayStartDrag && m_dragMayStartSelectionInstead && (dragState().type & DragSourceActionSelection) && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) { ASSERT(event.event().type() == PlatformEvent::MouseMoved); if ((dragState().type & DragSourceActionImage)) { // ... unless the mouse is over an image, then we start dragging just the image dragState().type = DragSourceActionImage; } else if (!(dragState().type & (DragSourceActionDHTML | DragSourceActionLink))) { // ... but only bail if we're not over an unselectable element. m_mouseDownMayStartDrag = false; dragState().source = 0; // ... but if this was the first click in the window, we don't even want to start selection if (eventActivatedView(event.event())) m_mouseDownMayStartSelect = false; } else { // Prevent the following case from occuring: // 1. User starts a drag immediately after mouse down over an unselectable element. // 2. We enter this block and decided that since we're over an unselectable element, don't cancel the drag. // 3. The drag gets resolved as a potential selection drag below /but/ we haven't exceeded the drag hysteresis yet. // 4. We enter this block again, and since it's now marked as a selection drag, we cancel the drag. 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; } // We are starting a text/image/url drag, so the cursor should be an arrow if (FrameView* view = m_frame.view()) { // FIXME : Custom cursors aren't supported during drag and drop (default to pointer). view->setCursor(pointerCursor()); } if (checkDragHysteresis == ShouldCheckDragHysteresis && !dragHysteresisExceeded(event.event().position())) return true; // Once we're past the hysteresis point, we don't want to treat this gesture as a click invalidateClick(); DragOperation srcOp = DragOperationNone; // This does work only if we missed a dragEnd. Do it anyway, just to make sure the old clipboard gets numbed. freeClipboard(); dragState().clipboard = createDraggingClipboard(); if (dragState().shouldDispatchEvents) { // Check to see if the is a DOM based drag. If it is, get the DOM specified drag image and offset. if (dragState().type == DragSourceActionDHTML) { if (RenderObject* renderer = dragState().source->renderer()) { // FIXME: This doesn't work correctly with transforms. FloatPoint absPos = renderer->localToAbsolute(); IntSize delta = m_mouseDownPos - roundedIntPoint(absPos); dragState().clipboard->setDragImage(dragState().source.get(), delta.width(), delta.height()); } else { // The renderer has disappeared, this can happen if the onStartDrag handler has hidden // the element in some way. In this case we just kill the drag. m_mouseDownMayStartDrag = false; goto cleanupDrag; } } m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown) && !m_frame.selection().selection().isInPasswordField(); // Invalidate clipboard here against anymore pasteboard writing for security. The drag // image can still be changed as we drag, but not the pasteboard data. dragState().clipboard->setAccessPolicy(ClipboardImageWritable); if (m_mouseDownMayStartDrag) { // Gather values from DHTML element, if it set any. srcOp = dragState().clipboard->sourceOperation(); // Yuck, a draggedImage:moveTo: message can be fired as a result of kicking off the // drag with dragImage! Because of that dumb reentrancy, we may think we've not // started the drag when that happens. So we have to assume it's started before we kick it off. dragState().clipboard->setDragHasStarted(); } } if (m_mouseDownMayStartDrag) { Page* page = m_frame.page(); m_didStartDrag = page && page->dragController().startDrag(m_frame, dragState(), srcOp, event.event(), m_mouseDownPos); // In WebKit2 we could re-enter this code and start another drag. // On OS X this causes problems with the ownership of the pasteboard and the promised types. if (m_didStartDrag) { m_mouseDownMayStartDrag = false; return true; } if (dragState().source && dragState().shouldDispatchEvents) { // Drag was canned at the last minute. We owe dragSource a dragend event. dispatchDragSrcEvent(eventNames().dragendEvent, event.event()); m_mouseDownMayStartDrag = false; } } cleanupDrag: if (!m_mouseDownMayStartDrag) { // Something failed to start the drag, clean up. freeClipboard(); dragState().source = 0; } // No more default handling (like selection), whether we're past the hysteresis bounds or not return true; } #endif // ENABLE(DRAG_SUPPORT) bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, TextEventInputType inputType) { // Platforms should differentiate real commands like selectAll from text input in disguise (like insertNewline), // and avoid dispatching text input events from keydown default handlers. ASSERT(!underlyingEvent || !underlyingEvent->isKeyboardEvent() || static_cast(underlyingEvent)->type() == eventNames().keypressEvent); EventTarget* target; if (underlyingEvent) target = underlyingEvent->target(); else target = eventTargetElementForDocument(m_frame.document()); if (!target) return false; if (FrameView* view = m_frame.view()) view->disableLayerFlushThrottlingTemporarilyForInteraction(); RefPtr 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(EFL) return EventHandler::isKeyboardOptionTab(event); #else UNUSED_PARAM(event); return false; #endif } bool EventHandler::tabsToLinks(KeyboardEvent* event) const { // FIXME: This function needs a better name. It can be called for keypresses other than Tab when spatial navigation is enabled. 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->backForward().goForward(); else handledEvent = page->backForward().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; // Arrows and other possible directional navigation keys can be used in design // mode editing. if (m_frame.document()->inDesignMode()) return; if (page->focusController().advanceFocus(focusDirection, event)) event->setDefaultHandled(); } void EventHandler::defaultTabEventHandler(KeyboardEvent* event) { ASSERT(event->type() == eventNames().keydownEvent); // We should only advance focus on tabs if no special modifier keys are held down. if (event->ctrlKey() || event->metaKey() || event->altGraphKey()) return; Page* page = m_frame.page(); if (!page) return; if (!page->tabKeyCyclesThroughElements()) return; FocusDirection focusDirection = event->shiftKey() ? FocusDirectionBackward : FocusDirectionForward; // Tabs can be used in design mode editing. if (m_frame.document()->inDesignMode()) return; if (page->focusController().advanceFocus(focusDirection, event)) event->setDefaultHandled(); } void EventHandler::capsLockStateMayHaveChanged() { Document* d = m_frame.document(); if (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()); } void EventHandler::setFrameWasScrolledByUser() { FrameView* v = m_frame.view(); if (v) v->setWasScrolledByUser(true); } bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar) { if (!scrollbar || !scrollbar->enabled()) return false; setFrameWasScrolledByUser(); return scrollbar->mouseDown(mev.event()); } // If scrollbar (under mouse) is different from last, send a mouse exited. Set // last to scrollbar if setLast is true; else set last to 0. void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool setLast) { if (m_lastScrollbarUnderMouse != scrollbar) { // Send mouse exited to the old scrollbar. if (m_lastScrollbarUnderMouse) m_lastScrollbarUnderMouse->mouseExited(); // Send mouse entered if we're setting a new scrollbar. if (scrollbar && setLast) scrollbar->mouseEntered(); m_lastScrollbarUnderMouse = setLast ? scrollbar : 0; } } #if ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_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: // TouchStationary state is not converted to touch events, so fall through to assert. default: ASSERT_NOT_REACHED(); return emptyAtom; } } static HitTestResult 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) { // First build up the lists to use for the 'touches', 'targetTouches' and 'changedTouches' attributes // in the JS event. See http://www.sitepen.com/blog/2008/07/10/touching-and-gesturing-on-the-iphone/ // for an overview of how these lists fit together. // Holds the complete set of touches on the screen and will be used as the 'touches' list in the JS event. RefPtr touches = TouchList::create(); // A different view on the 'touches' list above, filtered and grouped by event target. Used for the // 'targetTouches' list in the JS event. typedef HashMap> TargetTouchesMap; TargetTouchesMap touchesByTarget; // Array of touches per state, used to assemble the 'changedTouches' list in the JS event. typedef HashSet> EventTargetSet; struct { // The touches corresponding to the particular change state this struct instance represents. RefPtr m_touches; // Set of targets involved in m_touches. EventTargetSet m_targets; } changedTouches[PlatformTouchPoint::TouchStateEnd]; const Vector& 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; // The HitTestRequest types used for mouse events map quite adequately // to touch events. Note that in addition to meaning that the hit test // should affect the active state of the current node if necessary, // HitTestRequest::Active signifies that the hit test is taking place // with the mouse (or finger in this case) being pressed. switch (pointState) { case PlatformTouchPoint::TouchPressed: hitType |= HitTestRequest::Active; break; case PlatformTouchPoint::TouchMoved: hitType |= HitTestRequest::Active | HitTestRequest::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; // Increment the platform touch id by 1 to avoid storing a key of 0 in the hashmap. unsigned touchPointTargetKey = point.id() + 1; RefPtr 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; // FIXME: This code should use Element* instead of Node*. Node* node = result.innerElement(); ASSERT(node); if (InspectorInstrumentation::handleTouchEvent(m_frame.page(), node)) return true; Document& doc = node->document(); // Record the originating touch document even if it does not have a touch listener. if (freshTouchEvents) { m_originatingTouchPointDocument = &doc; freshTouchEvents = false; } if (!doc.hasTouchEventHandlers()) continue; m_originatingTouchPointTargets.set(touchPointTargetKey, node); touchTarget = node; } else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) { // No need to perform a hit-test since we only need to unset :hover and :active states. if (!shouldGesturesTriggerActive() && allTouchReleased) m_frame.document()->updateHoverActiveState(hitType, 0); if (touchPointTargetKey == m_originatingTouchPointTargetKey) m_originatingTouchPointTargetKey = 0; // The target should be the original target for this touch, so get it from the hashmap. As it's a release or cancel // we also remove it from the map. touchTarget = m_originatingTouchPointTargets.take(touchPointTargetKey); } else // No hittest is performed on move or stationary, since the target is not allowed to change anyway. touchTarget = m_originatingTouchPointTargets.get(touchPointTargetKey); if (!touchTarget.get()) continue; Document& doc = touchTarget->toNode()->document(); if (!doc.hasTouchEventHandlers()) continue; Frame* targetFrame = doc.frame(); if (!targetFrame) continue; if (&m_frame != targetFrame) { // pagePoint should always be relative to the target elements containing frame. 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::create(targetFrame, touchTarget.get(), point.id(), point.screenPos().x(), point.screenPos().y(), adjustedPageX, adjustedPageY, point.radiusX(), point.radiusY(), point.rotationAngle(), point.force()); // Ensure this target's touch list exists, even if it ends up empty, so it can always be passed to TouchEvent::Create below. TargetTouchesMap::iterator targetTouchesIterator = touchesByTarget.find(touchTarget.get()); if (targetTouchesIterator == touchesByTarget.end()) targetTouchesIterator = touchesByTarget.set(touchTarget.get(), TouchList::create()).iterator; // touches and targetTouches should only contain information about touches still on the screen, so if this point is // released or cancelled it will only appear in the changedTouches list. if (pointState != PlatformTouchPoint::TouchReleased && pointState != PlatformTouchPoint::TouchCancelled) { touches->append(touch); targetTouchesIterator->value->append(touch); } // Now build up the correct list for changedTouches. // Note that any touches that are in the TouchStationary state (e.g. if // the user had several points touched but did not move them all) should // never be in the changedTouches list so we do not handle them explicitly here. // See https://bugs.webkit.org/show_bug.cgi?id=37609 for further discussion // about the TouchStationary state. if (pointState != PlatformTouchPoint::TouchStationary) { ASSERT(pointState < PlatformTouchPoint::TouchStateEnd); if (!changedTouches[pointState].m_touches) changedTouches[pointState].m_touches = TouchList::create(); changedTouches[pointState].m_touches->append(touch); changedTouches[pointState].m_targets.add(touchTarget); } } m_touchPressed = touches->length() > 0; if (allTouchReleased) m_originatingTouchPointDocument.clear(); // Now iterate the changedTouches list and m_targets within it, sending events to the targets as required. bool swallowedEvent = false; RefPtr emptyList = TouchList::create(); for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) { if (!changedTouches[state].m_touches) continue; // When sending a touch cancel event, use empty touches and targetTouches lists. bool isTouchCancelEvent = (state == PlatformTouchPoint::TouchCancelled); RefPtr& effectiveTouches(isTouchCancelEvent ? emptyList : touches); const AtomicString& stateName(eventNameForTouchPointState(static_cast(state))); const EventTargetSet& targetsForState = changedTouches[state].m_targets; for (EventTargetSet::const_iterator it = targetsForState.begin(); it != targetsForState.end(); ++it) { EventTarget* touchEventTarget = it->get(); RefPtr targetTouches(isTouchCancelEvent ? emptyList : touchesByTarget.get(touchEventTarget)); ASSERT(targetTouches); RefPtr 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; } #endif // ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS) #if ENABLE(TOUCH_EVENTS) bool EventHandler::dispatchSyntheticTouchEventIfEnabled(const PlatformMouseEvent& event) { #if ENABLE(IOS_TOUCH_EVENTS) UNUSED_PARAM(event); return false; #else if (!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; // The order is important. This check should follow the subframe test: http://webkit.org/b/111292. if (eventType == PlatformEvent::MouseMoved && !m_touchPressed) return true; SyntheticSingleTouchEvent touchEvent(event); return handleTouchEvent(touchEvent); #endif } #endif // ENABLE(TOUCH_EVENTS) void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event) { m_mousePositionIsUnknown = false; m_lastKnownMousePosition = event.position(); m_lastKnownMouseGlobalPosition = event.globalPosition(); } } // namespace WebCore