/* * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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 "CachedImage.h" #include "Chrome.h" #include "ChromeClient.h" #include "ComposedShadowTreeWalker.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 "FloatPoint.h" #include "FloatRect.h" #include "FocusController.h" #include "Frame.h" #include "FrameLoader.h" #include "FrameSelection.h" #include "FrameTree.h" #include "FrameView.h" #include "htmlediting.h" #include "HTMLFrameElementBase.h" #include "HTMLFrameSetElement.h" #include "HTMLInputElement.h" #include "HTMLNames.h" #include "HitTestRequest.h" #include "HitTestResult.h" #include "Image.h" #include "InspectorInstrumentation.h" #include "KeyboardEvent.h" #include "MouseEvent.h" #include "MouseEventWithHitTestResults.h" #include "Page.h" #include "PlatformEvent.h" #include "PlatformKeyboardEvent.h" #include "PlatformWheelEvent.h" #include "PluginDocument.h" #include "RenderFrameSet.h" #include "RenderLayer.h" #include "RenderTextControlSingleLine.h" #include "RenderView.h" #include "RenderWidget.h" #include "ScrollAnimator.h" #include "Scrollbar.h" #include "Settings.h" #include "ShadowRoot.h" #include "SpatialNavigation.h" #include "StaticHashSetNodeList.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(GESTURE_EVENTS) #include "PlatformGestureEvent.h" #endif #if ENABLE(TOUCH_ADJUSTMENT) #include "TouchAdjustment.h" #endif #if ENABLE(SVG) #include "SVGDocument.h" #include "SVGElementInstance.h" #include "SVGNames.h" #include "SVGUseElement.h" #endif #if ENABLE(TOUCH_EVENTS) #include "PlatformTouchEvent.h" #include "TouchEvent.h" #include "TouchList.h" #endif #if ENABLE(CSS_IMAGE_SET) #include "StyleCachedImageSet.h" #endif namespace WebCore { using namespace HTMLNames; #if ENABLE(DRAG_SUPPORT) // The link drag hysteresis is much larger than the others because there // needs to be enough space to cancel the link press without starting a link drag, // and because dragging links is rare. const int LinkDragHysteresis = 40; const int ImageDragHysteresis = 5; const int TextDragHysteresis = 3; const int GeneralDragHysteresis = 3; #endif // ENABLE(DRAG_SUPPORT) // Match key code of composition keydown event on windows. // IE sends VK_PROCESSKEY which has value 229; const int CompositionEventKeyCode = 229; #if ENABLE(SVG) using namespace SVGNames; #endif // 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 quickly enough, // otherwise the long interval is used. const double fakeMouseMoveShortInterval = 0.1; const double fakeMouseMoveLongInterval = 0.250; const int maximumCursorSize = 128; #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 = max(*m_maxDuration, monotonicallyIncreasingTime() - m_start); } private: double* m_maxDuration; double m_start; }; #if ENABLE(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 static inline ScrollGranularity wheelGranularityToScrollGranularity(WheelEvent::Granularity granularity) { switch (granularity) { case WheelEvent::Page: return ScrollByPage; case WheelEvent::Line: return ScrollByLine; case WheelEvent::Pixel: return ScrollByPixel; } return ScrollByPixel; } static inline bool scrollNode(float delta, ScrollGranularity granularity, ScrollDirection positiveDirection, ScrollDirection negativeDirection, Node* node, Node** stopNode) { if (!delta) return false; if (!node->renderer()) return false; RenderBox* enclosingBox = node->renderer()->enclosingBox(); float absDelta = delta > 0 ? delta : -delta; return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, granularity, absDelta, stopNode); } static Node* closestScrollableNodeInDocumentIfPossible(Node* node) { for (Node* scrollableNode = node; scrollableNode; scrollableNode = scrollableNode->parentNode()) { if (scrollableNode->isDocumentNode()) break; RenderObject* renderer = scrollableNode->renderer(); if (renderer && renderer->isBox() && toRenderBox(renderer)->canBeScrolledAndHasScrollableArea()) return scrollableNode; } return node; } #if ENABLE(GESTURE_EVENTS) 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. #if PLATFORM(CHROMIUM) && !OS(ANDROID) return true; #else return false; #endif } #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) , m_autoscrollController(adoptPtr(new AutoscrollController)) , m_mouseDownMayStartAutoscroll(false) , m_mouseDownWasInSubframe(false) , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired) #if ENABLE(SVG) , m_svgPan(false) #endif , m_resizeLayer(0) , m_eventHandlerWillResetCapturingMouseEventsNode(0) , m_clickCount(0) , m_mousePositionIsUnknown(true) , m_mouseDownTimestamp(0) , m_widgetIsLatched(false) #if PLATFORM(MAC) , m_mouseDownView(nil) , m_sendingEventToSubview(false) , m_activationEventNumber(-1) #endif #if ENABLE(TOUCH_EVENTS) , m_originatingTouchPointTargetKey(0) , m_touchPressed(false) #endif , m_maxMouseMovedDuration(0) , m_baseEventType(PlatformEvent::NoType) , m_didStartDrag(false) , m_didLongPressInvokeContextMenu(false) { } EventHandler::~EventHandler() { ASSERT(!m_fakeMouseMoveEventTimer.isActive()); } #if ENABLE(DRAG_SUPPORT) DragState& EventHandler::dragState() { DEFINE_STATIC_LOCAL(DragState, state, ()); return state; } #endif // ENABLE(DRAG_SUPPORT) void EventHandler::clear() { m_hoverTimer.stop(); m_fakeMouseMoveEventTimer.stop(); m_resizeLayer = 0; m_nodeUnderMouse = 0; m_lastNodeUnderMouse = 0; #if ENABLE(SVG) m_instanceUnderMouse = 0; m_lastInstanceUnderMouse = 0; #endif m_lastMouseMoveEventSubframe = 0; m_lastScrollbarUnderMouse = 0; m_clickCount = 0; m_clickNode = 0; m_frameSetBeingResized = 0; #if ENABLE(DRAG_SUPPORT) m_dragTarget = 0; m_shouldOnlyFireDragOverEvent = false; #endif m_mousePositionIsUnknown = true; m_lastKnownMousePosition = IntPoint(); m_lastKnownMouseGlobalPosition = IntPoint(); m_mousePressNode = 0; m_mousePressed = false; m_capturesDragging = false; m_capturingMouseEventsNode = 0; m_latchedWheelEventNode = 0; m_previousWheelScrolledNode = 0; #if ENABLE(TOUCH_EVENTS) m_originatingTouchPointTargets.clear(); m_originatingTouchPointDocument.clear(); m_originatingTouchPointTargetKey = 0; #endif #if ENABLE(GESTURE_EVENTS) m_scrollGestureHandlingNode = 0; m_scrollbarHandlingScrollGesture = 0; #endif m_maxMouseMovedDuration = 0; m_baseEventType = PlatformEvent::NoType; m_didStartDrag = false; m_didLongPressInvokeContextMenu = false; } void EventHandler::nodeWillBeRemoved(Node* nodeToBeRemoved) { if (nodeToBeRemoved->contains(m_clickNode.get())) m_clickNode = 0; } static void setSelectionIfNeeded(FrameSelection* selection, const VisibleSelection& newSelection) { ASSERT(selection); if (selection->selection() != newSelection && selection->shouldChangeSelection(newSelection)) selection->setSelection(newSelection); } static inline bool dispatchSelectStart(Node* node) { if (!node || !node->renderer()) return true; return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true)); } bool EventHandler::updateSelectionForMouseDownDispatchingSelectStart(Node* targetNode, const VisibleSelection& newSelection, TextGranularity granularity) { if (Position::nodeIsUserSelectNone(targetNode)) return false; if (!dispatchSelectStart(targetNode)) return false; VisibleSelection selection(newSelection); #if ENABLE(USERSELECT_ALL) if (Node* rootUserSelectAll = Position::rootUserSelectAllForNode(targetNode)) { selection.setBase(positionBeforeNode(rootUserSelectAll).upstream(CanCrossEditingBoundary)); selection.setExtent(positionAfterNode(rootUserSelectAll).downstream(CanCrossEditingBoundary)); } #endif if (selection.isRange()) m_selectionInitiationState = ExtendedSelection; else { granularity = CharacterGranularity; m_selectionInitiationState = PlacedCaret; } m_frame->selection()->setNonDirectionalSelectionIfNeeded(selection, granularity); return true; } void EventHandler::selectClosestWordFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace) { Node* innerNode = result.targetNode(); VisibleSelection newSelection; if (innerNode && innerNode->renderer()) { VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); if (pos.isNotNull()) { newSelection = VisibleSelection(pos); newSelection.expandUsingGranularity(WordGranularity); } if (appendTrailingWhitespace == ShouldAppendTrailingWhitespace && newSelection.isRange()) newSelection.appendTrailingWhitespace(); updateSelectionForMouseDownDispatchingSelectStart(innerNode, newSelection, WordGranularity); } } void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result) { if (m_mouseDownMayStartSelect) { selectClosestWordFromHitTestResult(result.hitTestResult(), (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled()) ? ShouldAppendTrailingWhitespace : DontAppendTrailingWhitespace); } } void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result) { if (!result.hitTestResult().isLiveLink()) return selectClosestWordFromMouseEvent(result); Node* innerNode = result.targetNode(); if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) { VisibleSelection newSelection; Element* URLElement = result.hitTestResult().URLElement(); VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); if (pos.isNotNull() && pos.deepEquivalent().deprecatedNode()->isDescendantOf(URLElement)) newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement); updateSelectionForMouseDownDispatchingSelectStart(innerNode, 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* innerNode = event.targetNode(); if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) return false; VisibleSelection newSelection; VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint())); if (pos.isNotNull()) { newSelection = VisibleSelection(pos); newSelection.expandUsingGranularity(ParagraphGranularity); } return updateSelectionForMouseDownDispatchingSelectStart(innerNode, 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* innerNode = event.targetNode(); if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) return false; // Extend the selection if the Shift key is down, unless the click is in a link. bool extendSelection = event.event().shiftKey() && !event.isOverLink(); // Don't restart the selection when the mouse is pressed on an // existing selection so we can allow for text dragging. if (FrameView* view = m_frame->view()) { LayoutPoint vPoint = view->windowToContents(event.event().position()); if (!extendSelection && m_frame->selection()->contains(vPoint)) { m_mouseDownWasSingleClickInSelection = true; return false; } } VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint())); if (visiblePos.isNull()) visiblePos = VisiblePosition(firstPositionInOrBeforeNode(innerNode), DOWNSTREAM); Position pos = visiblePos.deepEquivalent(); VisibleSelection newSelection = m_frame->selection()->selection(); TextGranularity granularity = CharacterGranularity; if (extendSelection && newSelection.isCaretOrRange()) { ASSERT(m_frame->settings()); if (m_frame->settings()->editingBehaviorType() == EditingMacBehavior) { // 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 = VisibleSelection(visiblePos); bool handled = updateSelectionForMouseDownDispatchingSelectStart(innerNode, 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; if (!node->canStartSelection()) return false; return true; } bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event) { #if ENABLE(DRAG_SUPPORT) // Reset drag state. dragState().m_dragSrc = 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 ENABLE(SVG) if (m_frame->document()->isSVGDocument() && static_cast(m_frame->document())->zoomAndPanEnabled()) { if (event.event().shiftKey() && singleClick) { m_svgPan = true; static_cast(m_frame->document())->startPan(m_frame->view()->windowToContents(event.event().position())); return true; } } #endif // We don't do this at the start of mouse down handling, // because we don't want to do it until we know we didn't hit a widget. if (singleClick) focusDocumentView(); Node* innerNode = event.targetNode(); m_mousePressNode = innerNode; #if ENABLE(DRAG_SUPPORT) m_dragStartPos = event.event().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 (handleDrag(event, ShouldCheckDragHysteresis)) return true; if (!m_mousePressed) return false; Node* targetNode = event.targetNode(); if (event.event().button() != LeftButton || !targetNode) return false; RenderObject* renderer = targetNode->renderer(); if (!renderer) { renderer = targetNode->parentNode() ? targetNode->parentNode()->renderer() : 0; 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); 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); HitTestResult result(view->windowToContents(event.position())); m_frame->contentRenderer()->hitTest(request, result); DragState state; return result.innerNode() && page->dragController()->draggableNode(m_frame, result.innerNode(), 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); 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(); #if ENABLE(SVG) // Special case to limit selection to the containing block for SVG text. // FIXME: Isn't there a better non-SVG-specific way to do this? if (Node* selectionBaseNode = newSelection.base().deprecatedNode()) if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer()) if (selectionBaseRenderer->isSVGText()) if (target->renderer()->containingBlock() != selectionBaseRenderer->containingBlock()) return; #endif if (m_selectionInitiationState == HaveNotStartedSelection && !dispatchSelectStart(target)) return; if (m_selectionInitiationState != ExtendedSelection) { // 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()->setNonDirectionalSelectionIfNeeded(newSelection, m_frame->selection()->granularity(), FrameSelection::AdjustEndpointsAtBidiBoundary); } #endif // ENABLE(DRAG_SUPPORT) void EventHandler::lostMouseCapture() { m_frame->selection()->setCaretBlinkingSuspended(false); } bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event) { if (eventLoopHandleMouseUp(event)) return true; // 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_frame->selection()->setCaretBlinkingSuspended(false); m_mousePressed = false; m_capturesDragging = false; #if ENABLE(DRAG_SUPPORT) m_mouseDownMayStartDrag = false; #endif m_mouseDownMayStartSelect = false; m_mouseDownMayStartAutoscroll = false; m_mouseDownWasInSubframe = false; bool handled = false; // Clear the selection if the mouse didn't move after the last mouse // press and it's not a context menu click. We do this so when clicking // on the selection, the selection goes away. However, if we are // editing, place the caret. if (m_mouseDownWasSingleClickInSelection && m_selectionInitiationState != ExtendedSelection #if ENABLE(DRAG_SUPPORT) && m_dragStartPos == event.event().position() #endif && m_frame->selection()->isRange() && event.event().button() != RightButton) { VisibleSelection newSelection; Node* node = event.targetNode(); bool caretBrowsing = m_frame->settings() && m_frame->settings()->caretBrowsingEnabled(); if (node && (caretBrowsing || node->rendererIsEditable()) && node->renderer()) { VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint()); newSelection = VisibleSelection(pos); } setSelectionIfNeeded(m_frame->selection(), newSelection); handled = true; } m_frame->selection()->notifyRendererOfSelectionChange(UserTriggered); m_frame->selection()->selectFrameElementInParentIfFullySelected(); if (event.event().button() == MiddleButton) { // 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(RenderObject* renderer) { if (!renderer->isBox()) return; m_autoscrollController->startPanScrolling(toRenderBox(renderer), lastKnownMousePosition()); invalidateClick(); } #endif // ENABLE(PAN_SCROLLING) RenderObject* EventHandler::autoscrollRenderer() const { return m_autoscrollController->autoscrollRenderer(); } void EventHandler::updateAutoscrollRenderer() { m_autoscrollController->updateAutoscrollRenderer(); } bool EventHandler::autoscrollInProgress() const { return m_autoscrollController->autoscrollInProgress(); } bool EventHandler::panScrollInProgress() const { return m_autoscrollController->panScrollInProgress(); } #if ENABLE(DRAG_SUPPORT) DragSourceAction EventHandler::updateDragSourceActionsAllowed() const { if (!m_frame) return DragSourceActionNone; Page* page = m_frame->page(); if (!page) return DragSourceActionNone; FrameView* view = m_frame->view(); if (!view) return DragSourceActionNone; return page->dragController()->delegateDragSourceAction(view->contentsToRootView(m_mouseDownPos)); } #endif // ENABLE(DRAG_SUPPORT) HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, bool allowShadowContent, bool ignoreClipping, HitTestScrollbars testScrollbars, 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 (Page* page = m_frame->page()) { Frame* mainFrame = page->mainFrame(); if (m_frame != mainFrame) { FrameView* frameView = m_frame->view(); FrameView* mainView = mainFrame->view(); if (frameView && mainView) { IntPoint mainFramePoint = mainView->rootViewToContents(frameView->contentsToRootView(roundedIntPoint(point))); return mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping, testScrollbars, hitType, padding); } } } HitTestResult result(point, padding.height(), padding.width(), padding.height(), padding.width()); if (!m_frame->contentRenderer()) return result; if (ignoreClipping) hitType |= HitTestRequest::IgnoreClipping; if (allowShadowContent) hitType |= HitTestRequest::AllowShadowContent; HitTestRequest request(hitType); m_frame->contentRenderer()->hitTest(request, result); while (true) { Node* n = result.innerNode(); if (!result.isOverWidget() || !n || !n->renderer() || !n->renderer()->isWidget()) break; RenderWidget* renderWidget = toRenderWidget(n->renderer()); Widget* widget = renderWidget->widget(); if (!widget || !widget->isFrameView()) break; Frame* frame = static_cast(n)->contentFrame(); if (!frame || !frame->contentRenderer()) break; FrameView* view = static_cast(widget); LayoutPoint widgetPoint(result.localPoint().x() + view->scrollX() - renderWidget->borderLeft() - renderWidget->paddingLeft(), result.localPoint().y() + view->scrollY() - renderWidget->borderTop() - renderWidget->paddingTop()); HitTestResult widgetHitTestResult(widgetPoint, padding.height(), padding.width(), padding.height(), padding.width()); widgetHitTestResult.setPointInMainFrame(result.pointInMainFrame()); frame->contentRenderer()->hitTest(request, widgetHitTestResult); result = widgetHitTestResult; if (testScrollbars == ShouldHitTestScrollbars) { Scrollbar* eventScrollbar = view->scrollbarAtPoint(roundedIntPoint(point)); if (eventScrollbar) result.setScrollbar(eventScrollbar); } } if (!allowShadowContent) 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()->focusedNode(); if (!node) node = m_mousePressNode.get(); if (node) { RenderObject* r = node->renderer(); if (r && !r->isListBox() && r->enclosingBox()->scroll(direction, granularity)) { setFrameWasScrolledByUser(); return true; } } return false; } bool EventHandler::logicalScrollOverflow(ScrollLogicalDirection direction, ScrollGranularity granularity, Node* startingNode) { Node* node = startingNode; if (!node) node = m_frame->document()->focusedNode(); if (!node) node = m_mousePressNode.get(); if (node) { RenderObject* r = node->renderer(); if (r && !r->isListBox() && r->enclosingBox()->logicalScroll(direction, granularity)) { setFrameWasScrolledByUser(); return true; } } return false; } bool EventHandler::scrollRecursively(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode) { // The layout needs to be up to date to determine if we can scroll. We may be // here because of an onLoad event, in which case the final layout hasn't been performed yet. m_frame->document()->updateLayoutIgnorePendingStylesheets(); if (scrollOverflow(direction, granularity, startingNode)) return true; Frame* frame = m_frame; FrameView* view = frame->view(); if (view && view->scroll(direction, granularity)) return true; frame = frame->tree()->parent(); if (!frame) return false; return frame->eventHandler()->scrollRecursively(direction, granularity, m_frame->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; RenderObject* renderer = node->renderer(); if (!renderer || !renderer->isWidget()) return 0; Widget* widget = toRenderWidget(renderer)->widget(); if (!widget || !widget->isFrameView()) return 0; return static_cast(widget)->frame(); } static bool isSubmitImage(Node* node) { return node && node->hasTagName(inputTag) && static_cast(node)->isImageButton(); } // Returns true if the node's editable block is not current focused for editing static bool nodeIsNotBeingEdited(Node* node, Frame* frame) { return frame->selection()->rootEditableElement() != node->rootEditableElement(); } bool EventHandler::useHandCursor(Node* node, bool isOverLink, bool shiftKey) { if (!node) return false; bool editable = node->rendererIsEditable(); bool editableLinkEnabled = false; // If the link is editable, then we need to check the settings to see whether or not the link should be followed if (editable) { ASSERT(m_frame->settings()); switch (m_frame->settings()->editableLinkBehavior()) { default: case EditableLinkDefaultBehavior: case EditableLinkAlwaysLive: editableLinkEnabled = true; break; case EditableLinkNeverLive: editableLinkEnabled = false; break; case EditableLinkLiveWhenNotFocused: editableLinkEnabled = nodeIsNotBeingEdited(node, m_frame) || shiftKey; break; case EditableLinkOnlyLiveWithShiftKey: editableLinkEnabled = shiftKey; break; } } return ((isOverLink || isSubmitImage(node)) && (!editable || editableLinkEnabled)); } OptionalCursor EventHandler::selectCursor(const MouseEventWithHitTestResults& event, Scrollbar* scrollbar) { if (m_resizeLayer && m_resizeLayer->inResizeMode()) return NoCursorChange; Page* page = m_frame->page(); if (!page) return NoCursorChange; #if ENABLE(PAN_SCROLLING) if (page->mainFrame()->eventHandler()->panScrollInProgress()) return NoCursorChange; #endif Node* node = event.targetNode(); RenderObject* renderer = node ? node->renderer() : 0; RenderStyle* style = renderer ? renderer->style() : 0; bool horizontalText = !style || style->isHorizontalWritingMode(); const Cursor& iBeam = horizontalText ? iBeamCursor() : verticalTextCursor(); // During selection, use an I-beam no matter what we're over. // If 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_capturingMouseEventsNode) return iBeam; if (renderer) { Cursor overrideCursor; switch (renderer->getCursor(roundedIntPoint(event.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 && node->rendererIsEditable()); if (useHandCursor(node, event.isOverLink(), event.event().shiftKey())) return handCursor(); bool inResizer = false; if (renderer) { if (RenderLayer* layer = renderer->enclosingLayer()) { if (FrameView* view = m_frame->view()) inResizer = layer->isPointInResizeControl(view->windowToContents(event.event().position())); } } if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar) return iBeam; return pointerCursor(); } case CURSOR_CROSS: return crossCursor(); case CURSOR_POINTER: return handCursor(); case CURSOR_MOVE: return moveCursor(); case CURSOR_ALL_SCROLL: return moveCursor(); case CURSOR_E_RESIZE: return eastResizeCursor(); case CURSOR_W_RESIZE: return westResizeCursor(); case CURSOR_N_RESIZE: return northResizeCursor(); case CURSOR_S_RESIZE: return southResizeCursor(); case CURSOR_NE_RESIZE: return northEastResizeCursor(); case CURSOR_SW_RESIZE: return southWestResizeCursor(); case CURSOR_NW_RESIZE: return northWestResizeCursor(); case CURSOR_SE_RESIZE: return southEastResizeCursor(); case CURSOR_NS_RESIZE: return northSouthResizeCursor(); case CURSOR_EW_RESIZE: return eastWestResizeCursor(); case CURSOR_NESW_RESIZE: return northEastSouthWestResizeCursor(); case CURSOR_NWSE_RESIZE: return northWestSouthEastResizeCursor(); case CURSOR_COL_RESIZE: return columnResizeCursor(); case CURSOR_ROW_RESIZE: return rowResizeCursor(); case CURSOR_TEXT: return iBeamCursor(); case CURSOR_WAIT: return waitCursor(); case CURSOR_HELP: return helpCursor(); case CURSOR_VERTICAL_TEXT: return verticalTextCursor(); case CURSOR_CELL: return cellCursor(); case CURSOR_CONTEXT_MENU: return contextMenuCursor(); case CURSOR_PROGRESS: return progressCursor(); case CURSOR_NO_DROP: return noDropCursor(); case CURSOR_ALIAS: return aliasCursor(); case CURSOR_COPY: return copyCursor(); case CURSOR_NONE: return noneCursor(); case CURSOR_NOT_ALLOWED: return notAllowedCursor(); case CURSOR_DEFAULT: return pointerCursor(); case CURSOR_WEBKIT_ZOOM_IN: return zoomInCursor(); case CURSOR_WEBKIT_ZOOM_OUT: return zoomOutCursor(); case CURSOR_WEBKIT_GRAB: return grabCursor(); case CURSOR_WEBKIT_GRABBING: return grabbingCursor(); } return pointerCursor(); } static 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); // 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_capturingMouseEventsNode = mev.targetNode(); m_eventHandlerWillResetCapturingMouseEventsNode = 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->page() && m_frame->page()->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 (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); 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() && toShadowRoot(mev.targetNode())->host()->hasTagName(inputTag)) { HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); } FrameView* view = m_frame->view(); Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mouseEvent.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()); UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); // We get this instead of a second mouse-up m_mousePressed = false; setLastKnownMousePosition(mouseEvent); HitTestRequest request(HitTestRequest::Active); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); Frame* subframe = subframeForHitTestResult(mev); if (m_eventHandlerWillResetCapturingMouseEventsNode) m_capturingMouseEventsNode = 0; if (subframe && passMousePressEventToSubframe(mev, subframe)) return true; m_clickCount = mouseEvent.clickCount(); bool swallowMouseUpEvent = !dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false); bool swallowClickEvent = mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode && !dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true); if (m_lastScrollbarUnderMouse) swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp(mouseEvent); bool swallowMouseReleaseEvent = !swallowMouseUpEvent && handleMouseReleaseEvent(mev); invalidateClick(); return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent; } static RenderLayer* layerForNode(Node* node) { if (!node) return 0; RenderObject* renderer = node->renderer(); if (!renderer) return 0; RenderLayer* layer = renderer->enclosingLayer(); if (!layer) return 0; return layer; } bool EventHandler::mouseMoved(const PlatformMouseEvent& event) { RefPtr protector(m_frame->view()); MaximumDurationTracker maxDurationTracker(&m_maxMouseMovedDuration); #if ENABLE(TOUCH_EVENTS) // FIXME: this should be moved elsewhere to also be able to dispatch touchcancel events. bool defaultPrevented = dispatchSyntheticTouchEventIfEnabled(event); if (defaultPrevented) return true; #endif 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) { // in Radar 3703768 we saw frequent crashes apparently due to the // part being null here, which seems impossible, so check for nil // but also assert so that we can try to figure this out in debug // builds, if it happens. ASSERT(m_frame); if (!m_frame) return false; RefPtr protector(m_frame->view()); setLastKnownMousePosition(mouseEvent); if (m_hoverTimer.isActive()) m_hoverTimer.stop(); cancelFakeMouseMoveEvent(); #if ENABLE(SVG) if (m_svgPan) { static_cast(m_frame->document())->updatePan(m_frame->view()->windowToContents(m_lastKnownMousePosition)); return true; } #endif if (m_frameSetBeingResized) return !dispatchMouseEvent(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false); // Send events right to a scrollbar if the mouse is pressed. if (m_lastScrollbarUnderMouse && m_mousePressed) return m_lastScrollbarUnderMouse->mouseMoved(mouseEvent); HitTestRequest::HitTestRequestType hitType = HitTestRequest::Move; 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) // Treat any mouse move events as readonly if the user is currently touching the screen. if (m_touchPressed) hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly; #endif HitTestRequest request(hitType); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); if (hoveredNode) *hoveredNode = mev.hitTestResult(); Scrollbar* scrollbar = 0; if (m_resizeLayer && m_resizeLayer->inResizeMode()) m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner); else { if (FrameView* view = m_frame->view()) scrollbar = view->scrollbarAtPoint(mouseEvent.position()); if (!scrollbar) scrollbar = mev.scrollbar(); updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed); if (onlyUpdateScrollbars) return true; } bool swallowEvent = false; RefPtr newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev); // We want mouseouts to happen first, from the inside out. First send a move event to the last subframe so that it will fire mouseouts. if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe) passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get()); if (newSubframe) { // Update over/out state before passing the event to the subframe. updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true); // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target // node to be detached from its FrameView, in which case the event should not be passed. if (newSubframe->view()) swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode); } else { if (scrollbar && !m_mousePressed) scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering. if (FrameView* view = m_frame->view()) { OptionalCursor optionalCursor = selectCursor(mev, scrollbar); if (optionalCursor.isCursorChange()) { m_currentMouseCursor = optionalCursor.cursor(); view->setCursor(m_currentMouseCursor); } } } m_lastMouseMoveEventSubframe = newSubframe; if (swallowEvent) return true; swallowEvent = !dispatchMouseEvent(eventNames().mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true); #if ENABLE(DRAG_SUPPORT) if (!swallowEvent) swallowEvent = handleMouseDraggedEvent(mev); #endif // ENABLE(DRAG_SUPPORT) return swallowEvent; } void EventHandler::invalidateClick() { m_clickCount = 0; m_clickNode = 0; } bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent) { RefPtr protector(m_frame->view()); #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 ENABLE(SVG) if (m_svgPan) { m_svgPan = false; static_cast(m_frame->document())->updatePan(m_frame->view()->windowToContents(m_lastKnownMousePosition)); return true; } #endif if (m_frameSetBeingResized) return !dispatchMouseEvent(eventNames().mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false); if (m_lastScrollbarUnderMouse) { invalidateClick(); return m_lastScrollbarUnderMouse->mouseUp(mouseEvent); } HitTestRequest request(HitTestRequest::Release); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev); if (m_eventHandlerWillResetCapturingMouseEventsNode) m_capturingMouseEventsNode = 0; if (subframe && passMouseReleaseEventToSubframe(mev, subframe)) return true; bool swallowMouseUpEvent = !dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false); Node* clickTarget = mev.targetNode(); if (clickTarget) clickTarget = clickTarget->shadowAncestorNode(); Node* adjustedClickNode = m_clickNode ? m_clickNode->shadowAncestorNode() : 0; bool contextMenuEvent = mouseEvent.button() == RightButton; #if PLATFORM(CHROMIUM) && OS(DARWIN) // FIXME: The Mac port achieves the same behavior by checking whether the context menu is currently open in WebPage::mouseEvent(). Consider merging the implementations. if (mouseEvent.button() == LeftButton && mouseEvent.modifiers() & PlatformEvent::CtrlKey) contextMenuEvent = true; #endif bool swallowClickEvent = m_clickCount > 0 && !contextMenuEvent && clickTarget == adjustedClickNode && !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 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, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard) { FrameView* view = m_frame->view(); // FIXME: We might want to dispatch a dragleave even if the view is gone. if (!view) return false; view->resetDeferredRepaintDelay(); RefPtr me = MouseEvent::create(eventType, true, true, m_frame->document()->defaultView(), 0, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(), #if ENABLE(POINTER_LOCK) event.movementDelta().x(), event.movementDelta().y(), #endif event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), 0, 0, clipboard); ExceptionCode ec; dragTarget->dispatchEvent(me.get(), ec); return me->defaultPrevented(); } static bool targetIsFrame(Node* target, Frame*& frame) { if (!target) return false; if (!target->hasTagName(frameTag) && !target->hasTagName(iframeTag)) return false; frame = static_cast(target)->contentFrame(); return true; } static bool findDropZone(Node* target, Clipboard* clipboard) { Element* element = target->isElementNode() ? toElement(target) : target->parentElement(); for (; element; element = element->parentElement()) { bool matched = false; String dropZoneStr = element->fastGetAttribute(webkitdropzoneAttr); if (dropZoneStr.isEmpty()) continue; dropZoneStr.makeLower(); SpaceSplitString keywords(dropZoneStr, false); if (keywords.isNull()) continue; DragOperation dragOperation = DragOperationNone; for (unsigned int i = 0; i < keywords.size(); i++) { DragOperation op = convertDropZoneOperationToDragOperation(keywords[i]); if (op != DragOperationNone) { if (dragOperation == DragOperationNone) dragOperation = op; } else matched = matched || clipboard->hasDropZoneType(keywords[i].string()); if (matched && dragOperation != DragOperationNone) break; } if (matched) { clipboard->setDropEffect(convertDragOperationToDropZoneOperation(dragOperation)); return true; } } return false; } bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) { bool accept = false; if (!m_frame->view()) return false; HitTestRequest request(HitTestRequest::ReadOnly); MouseEventWithHitTestResults mev = prepareMouseEvent(request, event); // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch) RefPtr newTarget = mev.targetNode(); if (newTarget && newTarget->isTextNode()) newTarget = newTarget->parentNode(); 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().m_dragSrc && 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.get(), event, clipboard); if (!accept) accept = findDropZone(newTarget.get(), clipboard); } if (targetIsFrame(m_dragTarget.get(), targetFrame)) { if (targetFrame) accept = targetFrame->eventHandler()->updateDragAndDrop(event, clipboard); } else if (m_dragTarget) dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard); if (newTarget) { // 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().m_dragSrc && 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.get(), event, clipboard); if (!accept) accept = findDropZone(newTarget.get(), clipboard); m_shouldOnlyFireDragOverEvent = false; } } m_dragTarget = newTarget; return accept; } void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) { Frame* targetFrame; if (targetIsFrame(m_dragTarget.get(), targetFrame)) { if (targetFrame) targetFrame->eventHandler()->cancelDragAndDrop(event, clipboard); } else if (m_dragTarget.get()) { if (dragState().m_dragSrc && dragState().shouldDispatchEvents()) dispatchDragSrcEvent(eventNames().dragEvent, event); dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard); } clearDragState(); } bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) { Frame* targetFrame; bool preventedDefault = false; if (targetIsFrame(m_dragTarget.get(), targetFrame)) { if (targetFrame) preventedDefault = targetFrame->eventHandler()->performDragAndDrop(event, clipboard); } else if (m_dragTarget.get()) preventedDefault = dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard); clearDragState(); return preventedDefault; } void EventHandler::clearDragState() { m_dragTarget = 0; m_capturingMouseEventsNode = 0; m_shouldOnlyFireDragOverEvent = false; #if PLATFORM(MAC) m_sendingEventToSubview = false; #endif } #endif // ENABLE(DRAG_SUPPORT) void EventHandler::setCapturingMouseEventsNode(PassRefPtr n) { m_capturingMouseEventsNode = n; m_eventHandlerWillResetCapturingMouseEventsNode = false; } MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev) { ASSERT(m_frame); ASSERT(m_frame->document()); return m_frame->document()->prepareMouseEvent(request, documentPointForWindowPoint(m_frame, mev.position()), mev); } #if ENABLE(SVG) static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode) { if (!referenceNode || !referenceNode->isSVGElement()) return 0; ShadowRoot* shadowRoot = referenceNode->containingShadowRoot(); if (!shadowRoot) return 0; Element* shadowTreeParentElement = shadowRoot->host(); if (!shadowTreeParentElement || !shadowTreeParentElement->hasTagName(useTag)) return 0; return static_cast(shadowTreeParentElement)->instanceForShadowTreeElement(referenceNode); } #endif void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut) { Node* result = targetNode; // If we're capturing, we always go right to that node. if (m_capturingMouseEventsNode) result = m_capturingMouseEventsNode.get(); else { // If the target node is a text node, dispatch on the parent node - rdar://4196646 if (result && result->isTextNode()) { AncestorChainWalker walker(result); walker.parent(); result = walker.get(); } } m_nodeUnderMouse = result; #if ENABLE(SVG) m_instanceUnderMouse = instanceAssociatedWithShadowTreeElement(result); // 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_lastNodeUnderMouse == shadowTreeElement) continue; m_lastNodeUnderMouse = shadowTreeElement; m_lastInstanceUnderMouse = instance; break; } } } #endif // Fire mouseout/mouseover if the mouse has shifted to a different node. if (fireMouseOverOut) { RenderLayer* layerForLastNode = layerForNode(m_lastNodeUnderMouse.get()); RenderLayer* layerForNodeUnderMouse = layerForNode(m_nodeUnderMouse.get()); Page* page = m_frame->page(); if (m_lastNodeUnderMouse && (!m_nodeUnderMouse || m_nodeUnderMouse->document() != m_frame->document())) { // The mouse has moved between frames. if (Frame* frame = m_lastNodeUnderMouse->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_lastNodeUnderMouse->document()->frame()) { if (FrameView* frameView = frame->view()) { if (frameView->containsScrollableArea(layerForLastNode)) layerForLastNode->mouseExitedContentArea(); } } } if (m_nodeUnderMouse && (!m_lastNodeUnderMouse || m_lastNodeUnderMouse->document() != m_frame->document())) { // The mouse has moved between frames. if (Frame* frame = m_nodeUnderMouse->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_nodeUnderMouse->document()->frame()) { if (FrameView* frameView = frame->view()) { if (frameView->containsScrollableArea(layerForNodeUnderMouse)) layerForNodeUnderMouse->mouseEnteredContentArea(); } } } if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) { m_lastNodeUnderMouse = 0; m_lastScrollbarUnderMouse = 0; #if ENABLE(SVG) m_lastInstanceUnderMouse = 0; #endif } if (m_lastNodeUnderMouse != m_nodeUnderMouse) { // send mouseout event to the old node if (m_lastNodeUnderMouse) m_lastNodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoutEvent, 0, m_nodeUnderMouse.get()); // send mouseover event to the new node if (m_nodeUnderMouse) m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoverEvent, 0, m_lastNodeUnderMouse.get()); } m_lastNodeUnderMouse = m_nodeUnderMouse; #if ENABLE(SVG) m_lastInstanceUnderMouse = instanceAssociatedWithShadowTreeElement(m_nodeUnderMouse.get()); #endif } } bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, bool /*cancelable*/, int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder) { if (FrameView* view = m_frame->view()) view->resetDeferredRepaintDelay(); updateMouseEventTargetNode(targetNode, mouseEvent, setUnder); bool swallowEvent = false; if (m_nodeUnderMouse) swallowEvent = !(m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount)); if (!swallowEvent && eventType == eventNames().mousedownEvent) { // If clicking on a frame scrollbar, do not mess up with content focus. if (FrameView* view = m_frame->view()) { if (view->scrollbarAtPoint(mouseEvent.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. Node* node = m_nodeUnderMouse.get(); // Walk up the DOM tree to search for a node to focus. while (node) { if (node->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. ExceptionCode ec = 0; Node* n = node->isShadowRoot() ? toShadowRoot(node)->host() : node; if (m_frame->selection()->isRange() && m_frame->selection()->toNormalizedRange()->compareNode(n, ec) == Range::NODE_INSIDE && n->isDescendantOf(m_frame->document()->focusedNode())) return true; break; } node = node->parentOrHostNode(); } // Only change the focus when clicking scrollbars if it can transfered to a mouse focusable node. if ((!node || !node->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 (node && node->isMouseFocusable()) { if (!page->focusController()->setFocusedNode(node, m_frame)) swallowEvent = true; } else if (!node || !node->focused()) { if (!page->focusController()->setFocusedNode(0, m_frame)) swallowEvent = true; } } } return !swallowEvent; } bool EventHandler::isInsideScrollbar(const IntPoint& windowPoint) const { if (RenderView* renderView = m_frame->contentRenderer()) { HitTestRequest request(HitTestRequest::ReadOnly); HitTestResult result(windowPoint); renderView->hitTest(request, result); return result.scrollbar(); } return false; } #if !PLATFORM(GTK) && !(PLATFORM(CHROMIUM) && (OS(UNIX) && !OS(DARWIN))) bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult&, const PlatformWheelEvent&) const { return false; } #endif bool EventHandler::handleWheelEvent(const PlatformWheelEvent& e) { Document* doc = m_frame->document(); RenderObject* docRenderer = doc->renderer(); if (!docRenderer) return false; RefPtr protector(m_frame->view()); FrameView* view = m_frame->view(); if (!view) return false; setFrameWasScrolledByUser(); LayoutPoint vPoint = view->windowToContents(e.position()); Node* node; bool isOverWidget; HitTestRequest request(HitTestRequest::ReadOnly); HitTestResult result(vPoint); doc->renderView()->hitTest(request, result); bool useLatchedWheelEventNode = e.useLatchedEventNode(); if (useLatchedWheelEventNode) { if (!m_latchedWheelEventNode) { m_latchedWheelEventNode = closestScrollableNodeInDocumentIfPossible(result.innerNode()); m_widgetIsLatched = result.isOverWidget(); } node = m_latchedWheelEventNode.get(); isOverWidget = m_widgetIsLatched; } else { if (m_latchedWheelEventNode) m_latchedWheelEventNode = 0; if (m_previousWheelScrolledNode) m_previousWheelScrolledNode = 0; node = result.innerNode(); isOverWidget = result.isOverWidget(); } // 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 (node) { // Figure out which view to send the event to. RenderObject* target = node->renderer(); if (isOverWidget && target && target->isWidget()) { Widget* widget = toRenderWidget(target)->widget(); if (widget && passWheelEventToWidget(e, widget)) return true; } if (node && !node->dispatchWheelEvent(event)) 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 (!view) return false; return view->wheelEvent(event); } void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent) { if (!startNode || !wheelEvent) return; Node* stopNode = m_previousWheelScrolledNode.get(); ScrollGranularity granularity = wheelGranularityToScrollGranularity(wheelEvent->granularity()); // Break up into two scrolls if we need to. Diagonal movement on // a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set). if (scrollNode(wheelEvent->rawDeltaX(), granularity, ScrollLeft, ScrollRight, startNode, &stopNode)) wheelEvent->setDefaultHandled(); if (scrollNode(wheelEvent->rawDeltaY(), granularity, ScrollUp, ScrollDown, startNode, &stopNode)) wheelEvent->setDefaultHandled(); if (!m_latchedWheelEventNode) m_previousWheelScrolledNode = stopNode; } #if ENABLE(GESTURE_EVENTS) bool EventHandler::handleGestureTapDown() { FrameView* view = m_frame->view(); if (!view) return false; if (ScrollAnimator* scrollAnimator = view->existingScrollAnimator()) scrollAnimator->cancelAnimations(); const FrameView::ScrollableAreaSet* areas = view->scrollableAreas(); if (!areas) return false; for (FrameView::ScrollableAreaSet::const_iterator it = areas->begin(); it != areas->end(); ++it) { ScrollableArea* sa = *it; ScrollAnimator* animator = sa->scrollAnimator(); if (animator) animator->cancelAnimations(); } return false; } bool EventHandler::handleGestureEvent(const PlatformGestureEvent& gestureEvent) { // We don't use DoubleTap at the moment, it's mostly redundant with tap since tap now contains // a tap count. FIXME: We should probably remove GestureDoubleTap (http://wkb.ug/93045). if (gestureEvent.type() == PlatformEvent::GestureDoubleTap) return false; Node* eventTarget = 0; Scrollbar* scrollbar = 0; if (gestureEvent.type() == PlatformEvent::GestureScrollEnd || gestureEvent.type() == PlatformEvent::GestureScrollUpdate) { scrollbar = m_scrollbarHandlingScrollGesture.get(); eventTarget = m_scrollGestureHandlingNode.get(); } IntPoint adjustedPoint = gestureEvent.position(); HitTestRequest::HitTestRequestType hitType = HitTestRequest::TouchEvent; if (gestureEvent.type() == PlatformEvent::GestureTapDown) { #if ENABLE(TOUCH_ADJUSTMENT) adjustGesturePosition(gestureEvent, adjustedPoint); #endif hitType |= HitTestRequest::Active; } else if (gestureEvent.type() == PlatformEvent::GestureTap || gestureEvent.type() == PlatformEvent::GestureTapDownCancel) hitType |= HitTestRequest::Release; else hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly; if (!shouldGesturesTriggerActive()) hitType |= HitTestRequest::ReadOnly; if ((!scrollbar && !eventTarget) || !(hitType & HitTestRequest::ReadOnly)) { IntPoint hitTestPoint = m_frame->view()->windowToContents(adjustedPoint); HitTestResult result = hitTestResultAtPoint(hitTestPoint, false, false, ShouldHitTestScrollbars, hitType); eventTarget = result.targetNode(); if (!scrollbar) { FrameView* view = m_frame->view(); scrollbar = view ? view->scrollbarAtPoint(gestureEvent.position()) : 0; } if (!scrollbar) scrollbar = result.scrollbar(); } if (scrollbar) { bool eventSwallowed = scrollbar->gestureEvent(gestureEvent); if (gestureEvent.type() == PlatformEvent::GestureScrollBegin && eventSwallowed) m_scrollbarHandlingScrollGesture = scrollbar; else if (gestureEvent.type() == PlatformEvent::GestureScrollEnd || !eventSwallowed) m_scrollbarHandlingScrollGesture = 0; if (eventSwallowed) return true; } if (eventTarget) { bool eventSwallowed = eventTarget->dispatchGestureEvent(gestureEvent); if (gestureEvent.type() == PlatformEvent::GestureScrollBegin) { if (eventSwallowed) m_scrollGestureHandlingNode = eventTarget; else m_scrollGestureHandlingNode = 0; } if (eventSwallowed) return true; } // FIXME: A more general scroll system (https://bugs.webkit.org/show_bug.cgi?id=80596) will // eliminate the need for this. TemporaryChange baseEventType(m_baseEventType, gestureEvent.type()); switch (gestureEvent.type()) { case PlatformEvent::GestureScrollBegin: return handleGestureScrollCore(gestureEvent, ScrollByPixelWheelEvent, false); case PlatformEvent::GestureScrollUpdate: return handleGestureScrollUpdate(gestureEvent); case PlatformEvent::GestureTap: return handleGestureTap(gestureEvent); case PlatformEvent::GestureTapDown: return handleGestureTapDown(); case PlatformEvent::GestureLongPress: return handleGestureLongPress(gestureEvent); case PlatformEvent::GestureLongTap: return handleGestureLongTap(gestureEvent); case PlatformEvent::GestureTwoFingerTap: return handleGestureTwoFingerTap(gestureEvent); case PlatformEvent::GestureScrollEnd: case PlatformEvent::GestureDoubleTap: case PlatformEvent::GesturePinchBegin: case PlatformEvent::GesturePinchEnd: case PlatformEvent::GesturePinchUpdate: case PlatformEvent::GestureTapDownCancel: break; default: ASSERT_NOT_REACHED(); } return false; } bool EventHandler::handleGestureTap(const PlatformGestureEvent& gestureEvent) { // FIXME: Refactor this code to not hit test multiple times. We use the adjusted position to ensure that the correct node is targeted by the later redundant hit tests. IntPoint adjustedPoint = gestureEvent.position(); #if ENABLE(TOUCH_ADJUSTMENT) adjustGesturePosition(gestureEvent, adjustedPoint); #endif PlatformMouseEvent fakeMouseMove(adjustedPoint, gestureEvent.globalPosition(), NoButton, PlatformEvent::MouseMoved, /* clickCount */ 0, gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), gestureEvent.timestamp()); mouseMoved(fakeMouseMove); int tapCount = 1; // FIXME: deletaX is overloaded to mean different things for different gestures. // http://wkb.ug/93123 if (gestureEvent.deltaX() > 0) tapCount = static_cast(gestureEvent.deltaX()); bool defaultPrevented = false; PlatformMouseEvent fakeMouseDown(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, tapCount, gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), gestureEvent.timestamp()); defaultPrevented |= handleMousePressEvent(fakeMouseDown); PlatformMouseEvent fakeMouseUp(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MouseReleased, tapCount, gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey(), gestureEvent.timestamp()); defaultPrevented |= handleMouseReleaseEvent(fakeMouseUp); return defaultPrevented; } bool EventHandler::handleGestureLongPress(const PlatformGestureEvent& gestureEvent) { #if ENABLE(DRAG_SUPPORT) if (m_frame->settings() && m_frame->settings()->touchDragDropEnabled()) { IntPoint adjustedPoint = gestureEvent.position(); #if ENABLE(TOUCH_ADJUSTMENT) adjustGesturePosition(gestureEvent, adjustedPoint); #endif PlatformMouseEvent mouseDownEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MousePressed, 0, false, false, false, false, WTF::currentTime()); handleMousePressEvent(mouseDownEvent); PlatformMouseEvent mouseDragEvent(adjustedPoint, gestureEvent.globalPosition(), LeftButton, PlatformEvent::MouseMoved, 0, false, false, false, false, WTF::currentTime()); HitTestRequest request(HitTestRequest::ReadOnly); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseDragEvent); m_didStartDrag = false; handleDrag(mev, DontCheckDragHysteresis); if (m_didStartDrag) return true; } #endif return handleGestureForTextSelectionOrContextMenu(gestureEvent); } bool EventHandler::handleGestureLongTap(const PlatformGestureEvent& gestureEvent) { #if ENABLE(CONTEXT_MENUS) && !OS(ANDROID) if (!m_didLongPressInvokeContextMenu) return sendContextMenuEventForGesture(gestureEvent); #endif return false; } bool EventHandler::handleGestureForTextSelectionOrContextMenu(const PlatformGestureEvent& gestureEvent) { #if OS(ANDROID) IntPoint hitTestPoint = m_frame->view()->windowToContents(gestureEvent.position()); HitTestResult result = hitTestResultAtPoint(hitTestPoint, true); Node* innerNode = result.targetNode(); if (!result.isLiveLink() && innerNode && (innerNode->isContentEditable() || innerNode->isTextNode())) { selectClosestWordFromHitTestResult(result, DontAppendTrailingWhitespace); if (m_frame->selection()->isRange()) return true; } #endif #if ENABLE(CONTEXT_MENUS) m_didLongPressInvokeContextMenu = (gestureEvent.type() == PlatformEvent::GestureLongPress); return sendContextMenuEventForGesture(gestureEvent); #else return false; #endif } bool EventHandler::handleGestureTwoFingerTap(const PlatformGestureEvent& gestureEvent) { return handleGestureForTextSelectionOrContextMenu(gestureEvent); } bool EventHandler::handleGestureScrollUpdate(const PlatformGestureEvent& gestureEvent) { return handleGestureScrollCore(gestureEvent, ScrollByPixelWheelEvent, true); } bool EventHandler::isScrollbarHandlingGestures() const { return m_scrollbarHandlingScrollGesture.get(); } bool EventHandler::handleGestureScrollCore(const PlatformGestureEvent& gestureEvent, PlatformWheelEventGranularity granularity, bool latchedWheel) { const float tickDivisor = (float)WheelEvent::tickMultiplier; IntPoint point(gestureEvent.position().x(), gestureEvent.position().y()); IntPoint globalPoint(gestureEvent.globalPosition().x(), gestureEvent.globalPosition().y()); PlatformWheelEvent syntheticWheelEvent(point, globalPoint, gestureEvent.deltaX(), gestureEvent.deltaY(), gestureEvent.deltaX() / tickDivisor, gestureEvent.deltaY() / tickDivisor, granularity, gestureEvent.shiftKey(), gestureEvent.ctrlKey(), gestureEvent.altKey(), gestureEvent.metaKey()); syntheticWheelEvent.setUseLatchedEventNode(latchedWheel); return handleWheelEvent(syntheticWheelEvent); } #endif #if ENABLE(TOUCH_ADJUSTMENT) bool EventHandler::shouldApplyTouchAdjustment(const PlatformGestureEvent& event) const { if (m_frame->settings() && !m_frame->settings()->touchAdjustmentEnabled()) return false; return !event.area().isEmpty(); } bool EventHandler::bestClickableNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode) { HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active; IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter); HitTestResult result = hitTestResultAtPoint(hitTestPoint, /*allowShadowContent*/ true, /*ignoreClipping*/ false, DontHitTestScrollbars, hitType, touchRadius); IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius); RefPtr nodeList = StaticHashSetNodeList::adopt(result.rectBasedTestResult()); // FIXME: Should be able to handle targetNode being a shadow DOM node to avoid performing uncessary hit tests // in the case where further processing on the node is required. Returning the shadow ancestor prevents a // regression in touchadjustment/html-label.html. Some refinement is required to testing/internals to // handle targetNode being a shadow DOM node. bool success = findBestClickableCandidate(targetNode, targetPoint, touchCenter, touchRect, *nodeList.get()); if (success && targetNode) targetNode = targetNode->shadowAncestorNode(); return success; } bool EventHandler::bestContextMenuNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode) { HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active; IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter); HitTestResult result = hitTestResultAtPoint(hitTestPoint, /*allowShadowContent*/ true, /*ignoreClipping*/ false, DontHitTestScrollbars, hitType, touchRadius); IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius); RefPtr nodeList = StaticHashSetNodeList::adopt(result.rectBasedTestResult()); return findBestContextMenuCandidate(targetNode, targetPoint, touchCenter, touchRect, *nodeList.get()); } bool EventHandler::bestZoomableAreaForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntRect& targetArea, Node*& targetNode) { HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active; IntPoint hitTestPoint = m_frame->view()->windowToContents(touchCenter); HitTestResult result = hitTestResultAtPoint(hitTestPoint, /*allowShadowContent*/ false, /*ignoreClipping*/ false, DontHitTestScrollbars, hitType, touchRadius); IntRect touchRect(touchCenter - touchRadius, touchRadius + touchRadius); RefPtr nodeList = StaticHashSetNodeList::adopt(result.rectBasedTestResult()); return findBestZoomableArea(targetNode, targetArea, touchCenter, touchRect, *nodeList.get()); } bool EventHandler::adjustGesturePosition(const PlatformGestureEvent& gestureEvent, IntPoint& adjustedPoint) { if (!shouldApplyTouchAdjustment(gestureEvent)) return false; Node* targetNode = 0; switch (gestureEvent.type()) { case PlatformEvent::GestureTap: case PlatformEvent::GestureTapDown: bestClickableNodeForTouchPoint(gestureEvent.position(), IntSize(gestureEvent.area().width() / 2, gestureEvent.area().height() / 2), adjustedPoint, targetNode); break; case PlatformEvent::GestureLongPress: case PlatformEvent::GestureLongTap: case PlatformEvent::GestureTwoFingerTap: bestContextMenuNodeForTouchPoint(gestureEvent.position(), IntSize(gestureEvent.area().width() / 2, gestureEvent.area().height() / 2), adjustedPoint, targetNode); break; default: // FIXME: Implement handling for other types as needed. ASSERT_NOT_REACHED(); } return targetNode; } #endif #if ENABLE(CONTEXT_MENUS) bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event) { Document* doc = m_frame->document(); FrameView* v = m_frame->view(); if (!v) return false; // 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); 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()->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; Node* focusedNode = doc->focusedNode(); FrameSelection* selection = m_frame->selection(); Position start = selection->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 (focusedNode) { RenderBoxModelObject* box = focusedNode->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->focusedNode(); if (!targetNode) targetNode = doc; // Use the focused node as the target for hover and active. HitTestResult result(position); result.setInnerNode(targetNode); HitTestRequest request(HitTestRequest::Active); doc->updateHoverActiveState(request, result); doc->updateStyleIfNeeded(); // The contextmenu event is a mouse event even when invoked using the keyboard. // This is required for web compatibility. #if OS(WINDOWS) PlatformEvent::Type eventType = PlatformEvent::MouseReleased; #else PlatformEvent::Type eventType = PlatformEvent::MousePressed; #endif PlatformMouseEvent mouseEvent(position, globalPosition, RightButton, eventType, 1, false, false, false, false, WTF::currentTime()); return !dispatchMouseEvent(eventNames().contextmenuEvent, targetNode, true, 0, mouseEvent, false); } #if ENABLE(GESTURE_EVENTS) bool EventHandler::sendContextMenuEventForGesture(const PlatformGestureEvent& event) { #if OS(WINDOWS) PlatformEvent::Type eventType = PlatformEvent::MouseReleased; #else PlatformEvent::Type eventType = PlatformEvent::MousePressed; #endif IntPoint adjustedPoint = event.position(); #if ENABLE(TOUCH_ADJUSTMENT) adjustGesturePosition(event, adjustedPoint); #endif PlatformMouseEvent mouseEvent(adjustedPoint, event.globalPosition(), RightButton, eventType, 1, false, false, false, false, WTF::currentTime()); // To simulate right-click behavior, we send a right mouse down and then // context menu event. handleMousePressEvent(mouseEvent); return sendContextMenuEvent(mouseEvent); // We do not need to send a corresponding mouse release because in case of // right-click, the context menu takes capture and consumes all events. } #endif // ENABLE(GESTURE_EVENTS) #endif // ENABLE(CONTEXT_MENUS) void EventHandler::scheduleHoverStateUpdate() { if (!m_hoverTimer.isActive()) m_hoverTimer.startOneShot(0); } void EventHandler::dispatchFakeMouseMoveEventSoon() { if (m_mousePressed) return; if (m_mousePositionIsUnknown) return; Settings* settings = m_frame->settings(); if (settings && !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 > fakeMouseMoveShortInterval) { 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); Settings* settings = m_frame->settings(); if (settings && !settings->deviceSupportsMouse()) return; FrameView* view = m_frame->view(); if (!view) return; if (!m_frame->page() || !m_frame->page()->isOnscreen() || !m_frame->page()->focusController()->isActive()) return; bool shiftKey; bool ctrlKey; bool altKey; bool metaKey; PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey); PlatformMouseEvent fakeMouseMoveEvent(m_lastKnownMousePosition, m_lastKnownMouseGlobalPosition, NoButton, PlatformEvent::MouseMoved, 0, shiftKey, ctrlKey, altKey, metaKey, currentTime()); mouseMoved(fakeMouseMoveEvent); } void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet) { m_frameSetBeingResized = frameSet; } void EventHandler::resizeLayerDestroyed() { ASSERT(m_resizeLayer); m_resizeLayer = 0; } void EventHandler::hoverTimerFired(Timer*) { m_hoverTimer.stop(); ASSERT(m_frame); ASSERT(m_frame->document()); if (RenderView* renderer = m_frame->contentRenderer()) { if (FrameView* view = m_frame->view()) { HitTestRequest request(HitTestRequest::Move); HitTestResult result(view->windowToContents(m_lastKnownMousePosition)); renderer->hitTest(request, result); m_frame->document()->updateStyleIfNeeded(); } } } 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) 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 (Page* page = m_frame->page()) { if (page->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 node = eventTargetNodeForDocument(m_frame->document()); if (!node) return false; UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); UserTypingGestureIndicator typingGestureIndicator(m_frame); if (FrameView* view = m_frame->view()) view->resetDeferredRepaintDelay(); // FIXME (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 !node->dispatchKeyEvent(initialKeyEvent); bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks(); ExceptionCode ec; 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(node); if (initialKeyEvent.type() == PlatformEvent::RawKeyDown) { node->dispatchEvent(keydown, ec); // If frame changed as a result of keydown dispatch, then return true to avoid sending a subsequent keypress message to the new frame. bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame(); return keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame; } // Run input method in advance of DOM event handling. This may result in the IM // modifying the page prior the keydown event, but this behaviour is necessary // in order to match IE: // 1. preventing default handling of keydown and keypress events has no effect on IM input; // 2. if an input method handles the event, its keyCode is set to 229 in keydown event. m_frame->editor()->handleInputMethodKeydown(keydown.get()); bool handledByInputMethod = keydown->defaultHandled(); if (handledByInputMethod) { keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode); keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView()); keydown->setTarget(node); keydown->setDefaultHandled(); } node->dispatchEvent(keydown, ec); // If frame changed as a result of keydown dispatch, then return early to avoid sending a subsequent keypress message to the new frame. bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame(); bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame; if (handledByInputMethod || (keydownResult && !backwardCompatibilityMode)) return keydownResult; // Focus may have changed during keydown handling, so refetch node. // But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original node. if (!keydownResult) { node = eventTargetNodeForDocument(m_frame->document()); if (!node) return false; } PlatformKeyboardEvent keyPressEvent = initialKeyEvent; keyPressEvent.disambiguateKeyDownEvent(PlatformEvent::Char, backwardCompatibilityMode); if (keyPressEvent.text().isEmpty()) return keydownResult; RefPtr keypress = KeyboardEvent::create(keyPressEvent, m_frame->document()->defaultView()); keypress->setTarget(node); if (keydownResult) keypress->setDefaultPrevented(true); #if PLATFORM(MAC) keypress->keypressCommands() = keydown->keypressCommands(); #endif node->dispatchEvent(keypress, ec); return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled(); } 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::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); } // provides KB navigation and selection for enhanced accessibility users if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled()) handleKeyboardSelectionMovement(m_frame->selection(), 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().m_dragType) { 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().m_dragClipboard) dragState().m_dragClipboard->setAccessPolicy(ClipboardNumb); } 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); prepareMouseEvent(request, event); if (dragState().m_dragSrc && dragState().shouldDispatchEvents()) { dragState().m_dragClipboard->setDestinationOperation(operation); // for now we don't care if event handler cancels default behavior, since there is none dispatchDragSrcEvent(eventNames().dragendEvent, event); } freeClipboard(); dragState().m_dragSrc = 0; // In case the drag was ended due to an escape key press we need to ensure // that consecutive mousemove events don't reinitiate the drag and drop. m_mouseDownMayStartDrag = false; } void EventHandler::updateDragStateAfterEditDragIfNeeded(Element* rootEditableElement) { // If inserting the dragged contents removed the drag source, we still want to fire dragend at the root editble element. if (dragState().m_dragSrc && !dragState().m_dragSrc->inDocument()) dragState().m_dragSrc = rootEditableElement; } // returns if we should continue "default processing", i.e., whether eventhandler canceled bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event) { return !dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragClipboard.get()); } 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().m_dragSrc) { dragState().m_eventDispatchPolicy = (updateDragSourceActionsAllowed() & DragSourceActionDHTML) ? DragState::DispatchEvents: DragState::DoNotDispatchEvents; // try to find an element that wants to be dragged HitTestRequest request(HitTestRequest::ReadOnly); HitTestResult result(m_mouseDownPos); m_frame->contentRenderer()->hitTest(request, result); Node* node = result.innerNode(); if (node && m_frame->page()) dragState().m_dragSrc = m_frame->page()->dragController()->draggableNode(m_frame, node, m_mouseDownPos, dragState()); else dragState().m_dragSrc = 0; if (!dragState().m_dragSrc) m_mouseDownMayStartDrag = false; // no element is draggable else m_dragMayStartSelectionInstead = (dragState().m_dragType & 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().m_dragType & DragSourceActionSelection) && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) { ASSERT(event.event().type() == PlatformEvent::MouseMoved); if ((dragState().m_dragType & DragSourceActionImage)) { // ... unless the mouse is over an image, then we start dragging just the image dragState().m_dragType = DragSourceActionImage; } else if (!(dragState().m_dragType & (DragSourceActionDHTML | DragSourceActionLink))) { // ... but only bail if we're not over an unselectable element. m_mouseDownMayStartDrag = false; dragState().m_dragSrc = 0; // ... but if this was the first click in the window, we don't even want to start selection if (eventActivatedView(event.event())) m_mouseDownMayStartSelect = false; } 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().m_dragType)) { ASSERT((dragState().m_dragType & DragSourceActionSelection)); ASSERT((dragState().m_dragType & ~DragSourceActionSelection) == DragSourceActionDHTML || (dragState().m_dragType & ~DragSourceActionSelection) == DragSourceActionImage || (dragState().m_dragType & ~DragSourceActionSelection) == DragSourceActionLink); dragState().m_dragType = 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; freeClipboard(); // would only happen if we missed a dragEnd. Do it anyway, just // to make sure it gets numbified dragState().m_dragClipboard = createDraggingClipboard(); if (dragState().shouldDispatchEvents()) { // Check to see if the is a DOM based drag, if it is get the DOM specified drag // image and offset if (dragState().m_dragType == DragSourceActionDHTML) { if (RenderObject* renderer = dragState().m_dragSrc->renderer()) { // FIXME: This doesn't work correctly with transforms. FloatPoint absPos = renderer->localToAbsolute(); IntSize delta = m_mouseDownPos - roundedIntPoint(absPos); dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), toPoint(delta)); } else { // The renderer has disappeared, this can happen if the onStartDrag handler has hidden // the element in some way. In this case we just kill the drag. m_mouseDownMayStartDrag = false; goto cleanupDrag; } } m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown) && !m_frame->selection()->isInPasswordField(); // Invalidate clipboard here against anymore pasteboard writing for security. The drag // image can still be changed as we drag, but not the pasteboard data. dragState().m_dragClipboard->setAccessPolicy(ClipboardImageWritable); if (m_mouseDownMayStartDrag) { // gather values from DHTML element, if it set any srcOp = dragState().m_dragClipboard->sourceOperation(); // Yuck, a draggedImage:moveTo: message can be fired as a result of kicking off the // drag with dragImage! Because of that dumb reentrancy, we may think we've not // started the drag when that happens. So we have to assume it's started before we // kick it off. dragState().m_dragClipboard->setDragHasStarted(); } } if (m_mouseDownMayStartDrag) { Page* page = m_frame->page(); DragController* dragController = page ? page->dragController() : 0; m_didStartDrag = dragController && dragController->startDrag(m_frame, dragState(), srcOp, event.event(), m_mouseDownPos); // In WebKit2 we could reenter 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().shouldDispatchEvents()) { // Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event dispatchDragSrcEvent(eventNames().dragendEvent, event.event()); m_mouseDownMayStartDrag = false; } } cleanupDrag: if (!m_mouseDownMayStartDrag) { // something failed to start the drag, cleanup freeClipboard(); dragState().m_dragSrc = 0; } // No more default handling (like selection), whether we're past the hysteresis bounds or not return true; } #endif // ENABLE(DRAG_SUPPORT) bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, 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); if (!m_frame) return false; EventTarget* target; if (underlyingEvent) target = underlyingEvent->target(); else target = eventTargetNodeForDocument(m_frame->document()); if (!target) return false; if (FrameView* view = m_frame->view()) view->resetDeferredRepaintDelay(); RefPtr event = TextEvent::create(m_frame->document()->domWindow(), text, inputType); event->setUnderlyingEvent(underlyingEvent); ExceptionCode ec; target->dispatchEvent(event, ec); return event->defaultHandled(); } bool EventHandler::isKeyboardOptionTab(KeyboardEvent* event) { return event && (event->type() == eventNames().keydownEvent || event->type() == eventNames().keypressEvent) && event->altKey() && event->keyIdentifier() == "U+0009"; } bool EventHandler::eventInvertsTabsToLinksClientCallResult(KeyboardEvent* event) { #if PLATFORM(MAC) || PLATFORM(QT) || PLATFORM(EFL) return EventHandler::isKeyboardOptionTab(event); #else return false; #endif } bool EventHandler::tabsToLinks(KeyboardEvent* event) const { // 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(); } #if PLATFORM(QT) // Qt handles the space event in platform-specific WebKit code. // Eventually it would be good to eliminate that and use the code here instead. void EventHandler::defaultSpaceEventHandler(KeyboardEvent*) { } #else 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(); } #endif void EventHandler::defaultBackspaceEventHandler(KeyboardEvent* event) { ASSERT(event->type() == eventNames().keydownEvent); if (event->ctrlKey() || event->metaKey() || event->altKey() || event->altGraphKey()) return; if (!m_frame->editor()->behavior().shouldNavigateBackOnBackspace()) return; Page* page = m_frame->page(); if (!page) return; if (!m_frame->settings()->backspaceKeyNavigationEnabled()) return; bool handledEvent = false; if (event->shiftKey()) handledEvent = page->goForward(); else handledEvent = page->goBack(); if (handledEvent) event->setDefaultHandled(); } void EventHandler::defaultArrowEventHandler(FocusDirection focusDirection, KeyboardEvent* event) { ASSERT(event->type() == eventNames().keydownEvent); if (event->ctrlKey() || event->metaKey() || event->altGraphKey() || event->shiftKey()) return; Page* page = m_frame->page(); if (!page) return; if (!isSpatialNavigationEnabled(m_frame)) return; // 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 (Node* node = d->focusedNode()) { if (RenderObject* r = node->renderer()) { if (r->isTextField()) toRenderTextControlSingleLine(r)->capsLockStateMayHaveChanged(); } } } void EventHandler::sendResizeEvent() { m_frame->document()->enqueueWindowEvent(Event::create(eventNames().resizeEvent, false, false)); } void EventHandler::sendScrollEvent() { setFrameWasScrolledByUser(); if (m_frame->view() && m_frame->document()) m_frame->document()->eventQueue()->enqueueOrDispatchScrollEvent(m_frame->document(), DocumentEventQueue::ScrollEventDocumentTarget); } void EventHandler::setFrameWasScrolledByUser() { FrameView* v = m_frame->view(); if (v) v->setWasScrolledByUser(true); } bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar) { if (!scrollbar || !scrollbar->enabled()) return false; setFrameWasScrolledByUser(); return scrollbar->mouseDown(mev.event()); } // 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) 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; } } HitTestResult EventHandler::hitTestResultInFrame(Frame* frame, const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType) { HitTestResult result(point); if (!frame || !frame->contentRenderer()) return result; if (frame->view()) { IntRect rect = frame->view()->visibleContentRect(); if (!rect.contains(roundedIntPoint(point))) return result; } frame->contentRenderer()->hitTest(HitTestRequest(hitType), result); result.setToNonShadowAncestor(); 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 ENABLE(GESTURE_EVENTS) if (shouldGesturesTriggerActive()) hitType |= HitTestRequest::ReadOnly; #endif // 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, /*allowShadowContent*/ false, false, DontHitTestScrollbars, hitType); m_originatingTouchPointTargetKey = touchPointTargetKey; } else if (m_originatingTouchPointDocument.get() && m_originatingTouchPointDocument->frame()) { LayoutPoint pagePointInOriginatingDocument = documentPointForWindowPoint(m_originatingTouchPointDocument->frame(), point.pos()); result = hitTestResultInFrame(m_originatingTouchPointDocument->frame(), pagePointInOriginatingDocument, hitType); if (!result.innerNode()) continue; } else continue; Node* node = result.innerNode(); ASSERT(node); // Touch events should not go to text nodes if (node->isTextNode()) node = node->parentNode(); 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) continue; if (!doc->hasTouchEventHandlers()) continue; m_originatingTouchPointTargets.set(touchPointTargetKey, node); touchTarget = node; } else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) { // We only perform a hittest on release or cancel to unset :active or :hover state. if (touchPointTargetKey == m_originatingTouchPointTargetKey) { hitTestResultAtPoint(pagePoint, /*allowShadowContent*/ false, false, DontHitTestScrollbars, hitType); m_originatingTouchPointTargetKey = 0; } else if (m_originatingTouchPointDocument.get() && m_originatingTouchPointDocument->frame()) { LayoutPoint pagePointInOriginatingDocument = documentPointForWindowPoint(m_originatingTouchPointDocument->frame(), point.pos()); hitTestResultInFrame(m_originatingTouchPointDocument->frame(), pagePointInOriginatingDocument, hitType); } // 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) continue; 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()); ExceptionCode ec = 0; touchEventTarget->dispatchEvent(touchEvent.get(), ec); swallowedEvent = swallowedEvent || touchEvent->defaultPrevented() || touchEvent->defaultHandled(); } } return swallowedEvent; } bool EventHandler::dispatchSyntheticTouchEventIfEnabled(const PlatformMouseEvent& event) { if (!m_frame || !m_frame->settings() || !m_frame->settings()->isTouchEventEmulationEnabled()) return false; PlatformEvent::Type eventType = event.type(); if (eventType != PlatformEvent::MouseMoved && eventType != PlatformEvent::MousePressed && eventType != PlatformEvent::MouseReleased) return false; if (eventType == PlatformEvent::MouseMoved && !m_touchPressed) return false; HitTestRequest request(HitTestRequest::Active); MouseEventWithHitTestResults mev = prepareMouseEvent(request, event); if (mev.scrollbar() || subframeForHitTestResult(mev)) return false; SyntheticSingleTouchEvent touchEvent(event); return handleTouchEvent(touchEvent); } #endif void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event) { m_mousePositionIsUnknown = false; m_lastKnownMousePosition = event.position(); m_lastKnownMouseGlobalPosition = event.globalPosition(); } } // namespace WebCore