/* * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org) * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "EventHandler.h" #include "AXObjectCache.h" #include "CachedImage.h" #include "Chrome.h" #include "ChromeClient.h" #include "Cursor.h" #include "CursorList.h" #include "Document.h" #include "DragController.h" #include "Editor.h" #include "EventNames.h" #include "EventQueue.h" #include "FloatPoint.h" #include "FloatRect.h" #include "FocusController.h" #include "Frame.h" #include "FrameLoader.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 "PlatformKeyboardEvent.h" #include "PlatformWheelEvent.h" #include "PluginDocument.h" #if defined(ANDROID_PLUGINS) #include "PluginView.h" #endif #include "RenderFrameSet.h" #include "RenderLayer.h" #include "RenderTextControlSingleLine.h" #include "RenderView.h" #include "RenderWidget.h" #include "ScrollAnimator.h" #include "Scrollbar.h" #include "SelectionController.h" #include "Settings.h" #include "StyleCachedImage.h" #include "TextEvent.h" #include "TextIterator.h" #include "UserGestureIndicator.h" #include "UserTypingGestureIndicator.h" #include "WheelEvent.h" #include "WindowsKeyboardCodes.h" #include #include #if ENABLE(GESTURE_EVENTS) #include "PlatformGestureEvent.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" #endif #if ENABLE(GESTURE_RECOGNIZER) #include "PlatformGestureRecognizer.h" #endif #if defined(ANDROID_PLUGINS) #include "WebViewCore.h" #endif namespace WebCore { using namespace HTMLNames; #if ENABLE(DRAG_SUPPORT) // The link drag hysteresis is much larger than the others because there // needs to be enough space to cancel the link press without starting a link drag, // and because dragging links is rare. const int LinkDragHysteresis = 40; const int ImageDragHysteresis = 5; const int TextDragHysteresis = 3; const int GeneralDragHysteresis = 3; #endif // ENABLE(DRAG_SUPPORT) // Match key code of composition keydown event on windows. // IE sends VK_PROCESSKEY which has value 229; const int CompositionEventKeyCode = 229; #if ENABLE(SVG) using namespace SVGNames; #endif // When the autoscroll or the panScroll is triggered when do the scroll every 0.05s to make it smooth const double autoscrollInterval = 0.05; const double fakeMouseMoveInterval = 0.1; static inline bool scrollNode(float delta, WheelEvent::Granularity granularity, ScrollDirection positiveDirection, ScrollDirection negativeDirection, Node* node, Node** stopNode) { if (!delta) return false; if (!node->renderer()) return false; // Find the nearest enclosing box. RenderBox* enclosingBox = node->renderer()->enclosingBox(); float absDelta = delta > 0 ? delta : -delta; if (granularity == WheelEvent::Page) return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPage, absDelta, stopNode); if (granularity == WheelEvent::Line) return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByLine, absDelta, stopNode); if (granularity == WheelEvent::Pixel) return enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, absDelta, stopNode); return false; } #if !PLATFORM(MAC) inline bool EventHandler::eventLoopHandleMouseUp(const MouseEventWithHitTestResults&) { return false; } #if ENABLE(DRAG_SUPPORT) inline bool EventHandler::eventLoopHandleMouseDragged(const MouseEventWithHitTestResults&) { return false; } #endif #endif EventHandler::EventHandler(Frame* frame) : m_frame(frame) , m_mousePressed(false) , m_capturesDragging(false) , m_mouseDownMayStartSelect(false) #if ENABLE(DRAG_SUPPORT) , m_mouseDownMayStartDrag(false) #endif , m_mouseDownWasSingleClickInSelection(false) , m_beganSelectingText(false) , m_panScrollInProgress(false) , m_panScrollButtonPressed(false) , m_springLoadedPanScrollInProgress(false) , m_hoverTimer(this, &EventHandler::hoverTimerFired) , m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired) , m_autoscrollRenderer(0) , m_autoscrollInProgress(false) , m_mouseDownMayStartAutoscroll(false) , m_mouseDownWasInSubframe(false) , m_fakeMouseMoveEventTimer(this, &EventHandler::fakeMouseMoveEventTimerFired) #if ENABLE(SVG) , m_svgPan(false) #endif , m_resizeLayer(0) , m_eventHandlerWillResetCapturingMouseEventsNode(0) , m_clickCount(0) , m_mouseDownTimestamp(0) , m_useLatchedWheelEventNode(false) , m_widgetIsLatched(false) #if PLATFORM(MAC) , m_mouseDownView(nil) , m_sendingEventToSubview(false) , m_activationEventNumber(-1) #endif #if ENABLE(TOUCH_EVENTS) , m_touchPressed(false) #endif #if ENABLE(GESTURE_RECOGNIZER) , m_gestureRecognizer(PlatformGestureRecognizer::create()) #endif { } EventHandler::~EventHandler() { ASSERT(!m_fakeMouseMoveEventTimer.isActive()); } #if ENABLE(DRAG_SUPPORT) EventHandler::EventHandlerDragState& EventHandler::dragState() { DEFINE_STATIC_LOCAL(EventHandlerDragState, state, ()); return state; } #endif // ENABLE(DRAG_SUPPORT) void EventHandler::clear() { m_hoverTimer.stop(); m_fakeMouseMoveEventTimer.stop(); m_resizeLayer = 0; m_nodeUnderMouse = 0; m_lastNodeUnderMouse = 0; #if ENABLE(SVG) m_instanceUnderMouse = 0; m_lastInstanceUnderMouse = 0; #endif m_lastMouseMoveEventSubframe = 0; m_lastScrollbarUnderMouse = 0; m_clickCount = 0; m_clickNode = 0; m_frameSetBeingResized = 0; #if ENABLE(DRAG_SUPPORT) m_dragTarget = 0; m_shouldOnlyFireDragOverEvent = false; #endif m_currentMousePosition = IntPoint(); m_mousePressNode = 0; m_mousePressed = false; m_capturesDragging = false; m_capturingMouseEventsNode = 0; m_latchedWheelEventNode = 0; m_previousWheelScrolledNode = 0; #if ENABLE(TOUCH_EVENTS) m_originatingTouchPointTargets.clear(); #if PLATFORM(ANDROID) m_capturingTouchEventsNode = 0; #endif #endif } static void setSelectionIfNeeded(SelectionController* selection, const VisibleSelection& newSelection) { ASSERT(selection); if (selection->selection() != newSelection && selection->shouldChangeSelection(newSelection)) selection->setSelection(newSelection); } static void setNonDirectionalSelectionIfNeeded(SelectionController* selection, const VisibleSelection& newSelection, TextGranularity granularity) { ASSERT(selection); if (selection->selection() != newSelection && selection->shouldChangeSelection(newSelection)) selection->setSelection(newSelection, granularity, MakeNonDirectionalSelection); } void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result) { Node* innerNode = targetNode(result); VisibleSelection newSelection; if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) { VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); TextGranularity granularity = CharacterGranularity; if (pos.isNotNull()) { newSelection = VisibleSelection(pos); newSelection.expandUsingGranularity(WordGranularity); } if (newSelection.isRange()) { granularity = WordGranularity; m_beganSelectingText = true; if (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled()) newSelection.appendTrailingWhitespace(); } setNonDirectionalSelectionIfNeeded(m_frame->selection(), newSelection, granularity); } } void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result) { if (!result.hitTestResult().isLiveLink()) return selectClosestWordFromMouseEvent(result); Node* innerNode = targetNode(result); 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); TextGranularity granularity = CharacterGranularity; if (newSelection.isRange()) { granularity = WordGranularity; m_beganSelectingText = true; } setNonDirectionalSelectionIfNeeded(m_frame->selection(), newSelection, granularity); } } bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event) { if (event.event().button() != LeftButton) return false; if (m_frame->selection()->isRange()) // A double-click when range is already selected // should not change the selection. So, do not call // selectClosestWordFromMouseEvent, but do set // m_beganSelectingText to prevent handleMouseReleaseEvent // from setting caret selection. m_beganSelectingText = true; else selectClosestWordFromMouseEvent(event); return true; } bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event) { if (event.event().button() != LeftButton) return false; Node* innerNode = targetNode(event); if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) return false; VisibleSelection newSelection; VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint())); if (pos.isNotNull()) { newSelection = VisibleSelection(pos); newSelection.expandUsingGranularity(ParagraphGranularity); } TextGranularity granularity = CharacterGranularity; if (newSelection.isRange()) { granularity = ParagraphGranularity; m_beganSelectingText = true; } setNonDirectionalSelectionIfNeeded(m_frame->selection(), newSelection, granularity); return true; } 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) { Node* innerNode = targetNode(event); if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) return false; // Extend the selection if the Shift key is down, unless the click is in a link. bool extendSelection = event.event().shiftKey() && !event.isOverLink(); // Don't restart the selection when the mouse is pressed on an // existing selection so we can allow for text dragging. if (FrameView* view = m_frame->view()) { IntPoint vPoint = view->windowToContents(event.event().pos()); if (!extendSelection && m_frame->selection()->contains(vPoint)) { m_mouseDownWasSingleClickInSelection = true; return false; } } VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint())); if (visiblePos.isNull()) visiblePos = VisiblePosition(firstPositionInOrBeforeNode(innerNode), DOWNSTREAM); Position pos = visiblePos.deepEquivalent(); VisibleSelection newSelection = m_frame->selection()->selection(); TextGranularity granularity = CharacterGranularity; if (extendSelection && newSelection.isCaretOrRange()) { m_frame->selection()->setIsDirectional(false); ASSERT(m_frame->settings()); if (m_frame->settings()->editingBehaviorType() == EditingMacBehavior) { // See 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()); } m_beganSelectingText = true; } else newSelection = VisibleSelection(visiblePos); setNonDirectionalSelectionIfNeeded(m_frame->selection(), newSelection, granularity); return true; } bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event) { #if ENABLE(DRAG_SUPPORT) // Reset drag state. dragState().m_dragSrc = 0; #endif cancelFakeMouseMoveEvent(); if (ScrollView* scrollView = m_frame->view()) { if (scrollView->isPointInScrollbarCorner(event.event().pos())) return false; } bool singleClick = event.event().clickCount() <= 1; // If we got the event back, that must mean it wasn't prevented, // so it's allowed to start a drag or selection. m_mouseDownMayStartSelect = canMouseDownStartSelect(targetNode(event)); #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(event.event().pos()); return true; } } #endif // We don't do this at the start of mouse down handling, // because we don't want to do it until we know we didn't hit a widget. if (singleClick) focusDocumentView(); Node* innerNode = targetNode(event); m_mousePressNode = innerNode; #if ENABLE(DRAG_SUPPORT) m_dragStartPos = event.event().pos(); #endif bool swallowEvent = false; m_mousePressed = true; m_beganSelectingText = false; if (event.event().clickCount() == 2) swallowEvent = handleMousePressEventDoubleClick(event); else if (event.event().clickCount() >= 3) swallowEvent = handleMousePressEventTripleClick(event); else swallowEvent = handleMousePressEventSingleClick(event); m_mouseDownMayStartAutoscroll = m_mouseDownMayStartSelect || (m_mousePressNode && m_mousePressNode->renderBox() && m_mousePressNode->renderBox()->canBeProgramaticallyScrolled(true)); return swallowEvent; } // There are two kinds of renderer that can autoscroll. static bool canAutoscroll(RenderObject* renderer) { if (!renderer->isBox()) return false; // Check for a box that can be scrolled in its own right. if (toRenderBox(renderer)->canBeScrolledAndHasScrollableArea()) return true; // Check for a box that represents the top level of a web page. // This can be scrolled by calling Chrome::scrollRectIntoView. // This only has an effect on the Mac platform in applications // that put web views into scrolling containers, such as Mac OS X Mail. // The code for this is in RenderLayer::scrollRectToVisible. if (renderer->node() != renderer->document()) return false; Frame* frame = renderer->frame(); if (!frame) return false; Page* page = frame->page(); return page && page->mainFrame() == frame; } #if ENABLE(DRAG_SUPPORT) bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event) { if (handleDrag(event)) return true; if (!m_mousePressed) return false; Node* targetNode = EventHandler::targetNode(event); if (event.event().button() != LeftButton || !targetNode || !targetNode->renderer()) return false; #if PLATFORM(MAC) // FIXME: Why does this assertion fire on other platforms? ASSERT(m_mouseDownMayStartSelect || m_mouseDownMayStartAutoscroll); #endif m_mouseDownMayStartDrag = false; if (m_mouseDownMayStartAutoscroll && !m_panScrollInProgress) { // Find a renderer that can autoscroll. RenderObject* renderer = targetNode->renderer(); while (renderer && !canAutoscroll(renderer)) { if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement()) renderer = renderer->document()->ownerElement()->renderer(); else renderer = renderer->parent(); } if (renderer) { m_autoscrollInProgress = true; handleAutoscroll(renderer); } m_mouseDownMayStartAutoscroll = false; } if (!m_beganSelectingText) { HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); HitTestResult result(m_mouseDownPos); m_frame->document()->renderView()->layer()->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; bool DHTMLFlag; bool UAFlag; allowDHTMLDrag(DHTMLFlag, UAFlag); if (!DHTMLFlag && !UAFlag) return false; FrameView* view = m_frame->view(); if (!view) return false; HitTestRequest request(HitTestRequest::ReadOnly); HitTestResult result(view->windowToContents(event.pos())); m_frame->contentRenderer()->layer()->hitTest(request, result); bool srcIsDHTML; return result.innerNode() && result.innerNode()->renderer()->draggableNode(DHTMLFlag, UAFlag, result.point().x(), result.point().y(), srcIsDHTML); } void EventHandler::updateSelectionForMouseDrag() { FrameView* view = m_frame->view(); if (!view) return; RenderView* renderer = m_frame->contentRenderer(); if (!renderer) return; RenderLayer* layer = renderer->layer(); if (!layer) return; HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::MouseMove); HitTestResult result(view->windowToContents(m_currentMousePosition)); layer->hitTest(request, result); updateSelectionForMouseDrag(result); } static VisiblePosition selectionExtentRespectingEditingBoundary(const VisibleSelection& selection, const IntPoint& localPoint, Node* targetNode) { IntPoint 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 = roundedIntPoint(editableElement->renderer()->absoluteToLocal(absolutePoint)); targetNode = editableElement; } return targetNode->renderer()->positionForPoint(selectionEndPoint); } void EventHandler::updateSelectionForMouseDrag(const HitTestResult& hitTestResult) { if (!m_mouseDownMayStartSelect) return; Node* target = targetNode(hitTestResult); if (!target) return; if (!canMouseDragExtendSelect(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_beganSelectingText) { m_beganSelectingText = true; newSelection = VisibleSelection(targetPosition); } newSelection.setExtent(targetPosition); if (m_frame->selection()->granularity() != CharacterGranularity) newSelection.expandUsingGranularity(m_frame->selection()->granularity()); setNonDirectionalSelectionIfNeeded(m_frame->selection(), newSelection, m_frame->selection()->granularity()); } #endif // ENABLE(DRAG_SUPPORT) void EventHandler::lostMouseCapture() { m_frame->selection()->setCaretBlinkingSuspended(false); } bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event) { if (eventLoopHandleMouseUp(event)) return true; // If this was the first click in the window, we don't even want to clear the selection. // This case occurs when the user clicks on a draggable element, since we have to process // the mouse down and drag events to see if we might start a drag. For other first clicks // in a window, we just don't acceptFirstMouse, and the whole down-drag-up sequence gets // ignored upstream of this layer. return eventActivatedView(event.event()); } bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event) { if (m_autoscrollInProgress) stopAutoscrollTimer(); if (handleMouseUp(event)) return true; // Used to prevent mouseMoveEvent from initiating a drag before // the mouse is pressed again. m_frame->selection()->setCaretBlinkingSuspended(false); m_mousePressed = false; m_capturesDragging = false; #if ENABLE(DRAG_SUPPORT) m_mouseDownMayStartDrag = false; #endif m_mouseDownMayStartSelect = false; m_mouseDownMayStartAutoscroll = false; m_mouseDownWasInSubframe = false; bool handled = false; // Clear the selection if the mouse didn't move after the last mouse // press and it's not a context menu click. We do this so when clicking // on the selection, the selection goes away. However, if we are // editing, place the caret. if (m_mouseDownWasSingleClickInSelection && !m_beganSelectingText #if ENABLE(DRAG_SUPPORT) && m_dragStartPos == event.event().pos() #endif && m_frame->selection()->isRange() && event.event().button() != RightButton) { VisibleSelection newSelection; Node* node = targetNode(event); bool caretBrowsing = 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(true); m_frame->selection()->selectFrameElementInParentIfFullySelected(); return handled; } void EventHandler::handleAutoscroll(RenderObject* renderer) { // We don't want to trigger the autoscroll or the panScroll if it's already active if (m_autoscrollTimer.isActive()) return; setAutoscrollRenderer(renderer); #if ENABLE(PAN_SCROLLING) if (m_panScrollInProgress) { m_panScrollStartPos = currentMousePosition(); if (FrameView* view = m_frame->view()) view->addPanScrollIcon(m_panScrollStartPos); // If we're not in the top frame we notify it that we doing a panScroll. if (Page* page = m_frame->page()) { Frame* mainFrame = page->mainFrame(); if (m_frame != mainFrame) mainFrame->eventHandler()->setPanScrollInProgress(true); } } #endif startAutoscrollTimer(); } void EventHandler::autoscrollTimerFired(Timer*) { RenderObject* r = autoscrollRenderer(); if (!r || !r->isBox()) { stopAutoscrollTimer(); return; } if (m_autoscrollInProgress) { if (!m_mousePressed) { stopAutoscrollTimer(); return; } toRenderBox(r)->autoscroll(); } else { // we verify that the main frame hasn't received the order to stop the panScroll if (Page* page = m_frame->page()) { if (!page->mainFrame()->eventHandler()->panScrollInProgress()) { stopAutoscrollTimer(); return; } } #if ENABLE(PAN_SCROLLING) updatePanScrollState(); toRenderBox(r)->panScroll(m_panScrollStartPos); #endif } } #if ENABLE(PAN_SCROLLING) void EventHandler::startPanScrolling(RenderObject* renderer) { m_panScrollInProgress = true; m_panScrollButtonPressed = true; handleAutoscroll(renderer); invalidateClick(); } void EventHandler::updatePanScrollState() { FrameView* view = m_frame->view(); if (!view) return; // At the original click location we draw a 4 arrowed icon. Over this icon there won't be any scroll // So we don't want to change the cursor over this area bool east = m_panScrollStartPos.x() < (m_currentMousePosition.x() - ScrollView::noPanScrollRadius); bool west = m_panScrollStartPos.x() > (m_currentMousePosition.x() + ScrollView::noPanScrollRadius); bool north = m_panScrollStartPos.y() > (m_currentMousePosition.y() + ScrollView::noPanScrollRadius); bool south = m_panScrollStartPos.y() < (m_currentMousePosition.y() - ScrollView::noPanScrollRadius); if ((east || west || north || south) && m_panScrollButtonPressed) m_springLoadedPanScrollInProgress = true; if (north) { if (east) view->setCursor(northEastPanningCursor()); else if (west) view->setCursor(northWestPanningCursor()); else view->setCursor(northPanningCursor()); } else if (south) { if (east) view->setCursor(southEastPanningCursor()); else if (west) view->setCursor(southWestPanningCursor()); else view->setCursor(southPanningCursor()); } else if (east) view->setCursor(eastPanningCursor()); else if (west) view->setCursor(westPanningCursor()); else view->setCursor(middlePanningCursor()); } #endif // ENABLE(PAN_SCROLLING) RenderObject* EventHandler::autoscrollRenderer() const { return m_autoscrollRenderer; } void EventHandler::updateAutoscrollRenderer() { if (!m_autoscrollRenderer) return; HitTestResult hitTest = hitTestResultAtPoint(m_panScrollStartPos, true); if (Node* nodeAtPoint = hitTest.innerNode()) m_autoscrollRenderer = nodeAtPoint->renderer(); while (m_autoscrollRenderer && !canAutoscroll(m_autoscrollRenderer)) m_autoscrollRenderer = m_autoscrollRenderer->parent(); } void EventHandler::setAutoscrollRenderer(RenderObject* renderer) { m_autoscrollRenderer = renderer; } #if ENABLE(DRAG_SUPPORT) void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const { flagDHTML = false; flagUA = false; if (!m_frame) return; Page* page = m_frame->page(); if (!page) return; FrameView* view = m_frame->view(); if (!view) return; unsigned mask = page->dragController()->delegateDragSourceAction(view->contentsToWindow(m_mouseDownPos)); flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone; flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection)); } #endif // ENABLE(DRAG_SUPPORT) HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent, bool ignoreClipping, HitTestScrollbars testScrollbars, HitTestRequest::HitTestRequestType hitType, const IntSize& padding) { HitTestResult result(point, padding.height(), padding.width(), padding.height(), padding.width()); if (!m_frame->contentRenderer()) return result; if (ignoreClipping) hitType |= HitTestRequest::IgnoreClipping; m_frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), result); while (true) { Node* n = result.innerNode(); if (!result.isOverWidget() || !n || !n->renderer() || !n->renderer()->isWidget()) break; RenderWidget* renderWidget = toRenderWidget(n->renderer()); Widget* widget = renderWidget->widget(); if (!widget || !widget->isFrameView()) break; Frame* frame = static_cast(n)->contentFrame(); if (!frame || !frame->contentRenderer()) break; FrameView* view = static_cast(widget); IntPoint widgetPoint(result.localPoint().x() + view->scrollX() - renderWidget->borderLeft() - renderWidget->paddingLeft(), result.localPoint().y() + view->scrollY() - renderWidget->borderTop() - renderWidget->paddingTop()); HitTestResult widgetHitTestResult(widgetPoint, padding.height(), padding.width(), padding.height(), padding.width()); frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), widgetHitTestResult); result = widgetHitTestResult; if (testScrollbars == ShouldHitTestScrollbars) { Scrollbar* eventScrollbar = view->scrollbarAtPoint(point); if (eventScrollbar) result.setScrollbar(eventScrollbar); } } // If our HitTestResult is not visible, then we started hit testing too far down the frame chain. // Another hit test at the main frame level should get us the correct visible result. Frame* resultFrame = result.innerNonSharedNode() ? result.innerNonSharedNode()->document()->frame() : 0; if (Page* page = m_frame->page()) { Frame* mainFrame = page->mainFrame(); if (m_frame != mainFrame && resultFrame && resultFrame != mainFrame && !resultFrame->editor()->insideVisibleArea(result.point())) { FrameView* resultView = resultFrame->view(); FrameView* mainView = mainFrame->view(); if (resultView && mainView) { IntPoint windowPoint = resultView->contentsToWindow(result.point()); IntPoint mainFramePoint = mainView->windowToContents(windowPoint); result = mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping, testScrollbars, hitType, padding); } } } if (!allowShadowContent) result.setToNonShadowAncestor(); return result; } void EventHandler::startAutoscrollTimer() { m_autoscrollTimer.startRepeating(autoscrollInterval); } void EventHandler::stopAutoscrollTimer(bool rendererIsBeingDestroyed) { if (m_autoscrollInProgress) { if (m_mouseDownWasInSubframe) { if (Frame* subframe = subframeForTargetNode(m_mousePressNode.get())) subframe->eventHandler()->stopAutoscrollTimer(rendererIsBeingDestroyed); return; } } if (autoscrollRenderer()) { if (!rendererIsBeingDestroyed && (m_autoscrollInProgress || m_panScrollInProgress)) toRenderBox(autoscrollRenderer())->stopAutoscroll(); #if ENABLE(PAN_SCROLLING) if (m_panScrollInProgress) { if (FrameView* view = m_frame->view()) { view->removePanScrollIcon(); view->setCursor(pointerCursor()); } } #endif setAutoscrollRenderer(0); } m_autoscrollTimer.stop(); m_panScrollInProgress = false; m_springLoadedPanScrollInProgress = false; // If we're not in the top frame we notify it that we are not doing a panScroll any more. if (Page* page = m_frame->page()) { Frame* mainFrame = page->mainFrame(); if (m_frame != mainFrame) mainFrame->eventHandler()->setPanScrollInProgress(false); } m_autoscrollInProgress = false; } Node* EventHandler::mousePressNode() const { return m_mousePressNode.get(); } void EventHandler::setMousePressNode(PassRefPtr node) { 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::currentMousePosition() const { return m_currentMousePosition; } Frame* EventHandler::subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult) { if (!hitTestResult.isOverWidget()) return 0; return subframeForTargetNode(targetNode(hitTestResult)); } 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(); } Cursor EventHandler::selectCursor(const MouseEventWithHitTestResults& event, Scrollbar* scrollbar) { Node* node = targetNode(event); 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 you're capturing mouse events for a particular node, don't treat this as a selection. if (m_mousePressed && m_mouseDownMayStartSelect && m_frame->selection()->isCaretOrRange() && !m_capturingMouseEventsNode) return iBeam; if (renderer && renderer->isFrameSet()) { RenderFrameSet* frameSetRenderer = toRenderFrameSet(renderer); if (frameSetRenderer->canResizeRow(event.localPoint())) return rowResizeCursor(); if (frameSetRenderer->canResizeColumn(event.localPoint())) return columnResizeCursor(); } if (style && style->cursors()) { const CursorList* cursors = style->cursors(); for (unsigned i = 0; i < cursors->size(); ++i) { const CachedImage* cimage = 0; StyleImage* image = (*cursors)[i].image(); if (image && image->isCachedImage()) cimage = static_cast(image)->cachedImage(); if (!cimage) continue; IntPoint hotSpot = (*cursors)[i].hotSpot(); // Limit the size of cursors so that they cannot be used to cover UI elements in chrome. IntSize size = cimage->image()->size(); if (size.width() > 128 || size.height() > 128) continue; if (cimage->image()->isNull()) break; if (!cimage->errorOccurred()) return Cursor(cimage->image(), hotSpot); } } switch (style ? style->cursor() : CURSOR_AUTO) { case CURSOR_AUTO: { bool editable = (node && node->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) || event.event().shiftKey(); break; case EditableLinkOnlyLiveWithShiftKey: editableLinkEnabled = event.event().shiftKey(); break; } } if ((event.isOverLink() || isSubmitImage(node)) && (!editable || editableLinkEnabled)) return handCursor(); bool inResizer = false; if (renderer) { if (RenderLayer* layer = renderer->enclosingLayer()) { if (FrameView* view = m_frame->view()) inResizer = layer->isPointInResizeControl(view->windowToContents(event.event().pos())); } } if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar) return 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 IntPoint documentPointForWindowPoint(Frame* frame, const IntPoint& windowPoint) { FrameView* view = frame->view(); // FIXME: Is it really OK to use the wrong coordinates here when view is 0? // Historically the code would just crash; this is clearly no worse than that. return view ? view->windowToContents(windowPoint) : windowPoint; } Node* EventHandler::targetNode(const MouseEventWithHitTestResults& event) { return targetNode(event.hitTestResult()); } Node* EventHandler::targetNode(const HitTestResult& hitTestResult) { Node* node = hitTestResult.innerNode(); if (!node) return 0; if (node->inDocument()) return node; Element* element = node->parentElement(); if (element && element->inDocument()) return element; return node; } bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent) { RefPtr protector(m_frame->view()); UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); cancelFakeMouseMoveEvent(); m_mousePressed = true; m_capturesDragging = true; m_currentMousePosition = mouseEvent.pos(); m_mouseDownTimestamp = mouseEvent.timestamp(); #if ENABLE(DRAG_SUPPORT) m_mouseDownMayStartDrag = false; #endif m_mouseDownMayStartSelect = false; m_mouseDownMayStartAutoscroll = false; if (FrameView* view = m_frame->view()) m_mouseDownPos = view->windowToContents(mouseEvent.pos()); else { invalidateClick(); return false; } m_mouseDownWasInSubframe = false; #if ENABLE(COMPOSITED_FIXED_ELEMENTS) // Add IgnoreClipping because fixed position elements are moved only on the // UI thread. Nodes in fixed position elements are clipped out by the view // without IgnoreClipping. HitTestRequest request(HitTestRequest::Active | HitTestRequest::IgnoreClipping); #else HitTestRequest request(HitTestRequest::Active); #endif // Save the document point we generate in case the window coordinate is invalidated by what happens // when we dispatch the event. IntPoint documentPoint = documentPointForWindowPoint(m_frame, mouseEvent.pos()); MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); if (!targetNode(mev)) { invalidateClick(); return false; } m_mousePressNode = targetNode(mev); if (InspectorInstrumentation::handleMousePress(m_frame->page())) { invalidateClick(); return true; } Frame* subframe = subframeForHitTestResult(mev); if (subframe && passMousePressEventToSubframe(mev, subframe)) { // Start capturing future events for this frame. We only do this if we didn't clear // the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop. m_capturesDragging = subframe->eventHandler()->capturesDragging(); if (m_mousePressed && m_capturesDragging) { m_capturingMouseEventsNode = targetNode(mev); 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_panScrollInProgress to false on return. bool isPanScrollInProgress = m_frame->page() && m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress(); if (isPanScrollInProgress || m_autoscrollInProgress) 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 = targetNode(mev); if (FrameView* view = m_frame->view()) { RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0; IntPoint p = view->windowToContents(mouseEvent.pos()); if (layer && layer->isPointInResizeControl(p)) { layer->setInResizeMode(true); m_resizeLayer = layer; m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p); invalidateClick(); return true; } } m_frame->selection()->setCaretBlinkingSuspended(true); bool swallowEvent = dispatchMouseEvent(eventNames().mousedownEvent, targetNode(mev), true, m_clickCount, mouseEvent, true); m_capturesDragging = !swallowEvent; // If the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults // in case the scrollbar widget was destroyed when the mouse event was handled. if (mev.scrollbar()) { const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get(); HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get()) m_lastScrollbarUnderMouse = 0; } if (swallowEvent) { // scrollbars should get events anyway, even disabled controls might be scrollable Scrollbar* scrollbar = mev.scrollbar(); updateLastScrollbarUnderMouse(scrollbar, true); if (scrollbar) passMousePressEventToScrollbar(mev, scrollbar); } else { // Refetch the event target node if it currently is the shadow node inside an 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 (targetNode(mev)->isShadowRoot() && targetNode(mev)->shadowHost()->hasTagName(inputTag)) { HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active); mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent); } FrameView* view = m_frame->view(); Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mouseEvent.pos()) : 0; if (!scrollbar) scrollbar = mev.scrollbar(); updateLastScrollbarUnderMouse(scrollbar, true); if (scrollbar && passMousePressEventToScrollbar(mev, scrollbar)) swallowEvent = true; else swallowEvent = handleMousePressEvent(mev); } return swallowEvent; } // This method only exists for platforms that don't know how to deliver bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent) { RefPtr protector(m_frame->view()); UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); // We get this instead of a second mouse-up m_mousePressed = false; m_currentMousePosition = mouseEvent.pos(); HitTestRequest request(HitTestRequest::Active); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); Frame* subframe = subframeForHitTestResult(mev); if (m_eventHandlerWillResetCapturingMouseEventsNode) m_capturingMouseEventsNode = 0; if (subframe && passMousePressEventToSubframe(mev, subframe)) return true; m_clickCount = mouseEvent.clickCount(); bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, targetNode(mev), true, m_clickCount, mouseEvent, false); bool swallowClickEvent = mouseEvent.button() != RightButton && targetNode(mev) == m_clickNode && dispatchMouseEvent(eventNames().clickEvent, targetNode(mev), true, m_clickCount, mouseEvent, true); if (m_lastScrollbarUnderMouse) swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp(); 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) { HitTestResult hoveredNode = HitTestResult(IntPoint()); bool result = handleMouseMoveEvent(event, &hoveredNode); Page* page = m_frame->page(); if (!page) return result; if (RenderLayer* layer = layerForNode(hoveredNode.innerNode())) { if (page->containsScrollableArea(layer)) layer->scrollAnimator()->mouseMovedInContentArea(); } if (FrameView* frameView = m_frame->view()) frameView->scrollAnimator()->mouseMovedInContentArea(); hoveredNode.setToNonShadowAncestor(); page->chrome()->mouseDidMoveOverElement(hoveredNode, event.modifierFlags()); page->chrome()->setToolTip(hoveredNode); return result; } bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode) { // in Radar 3703768 we saw frequent crashes apparently due to the // part being null here, which seems impossible, so check for nil // but also assert so that we can try to figure this out in debug // builds, if it happens. ASSERT(m_frame); if (!m_frame) return false; RefPtr protector(m_frame->view()); m_currentMousePosition = mouseEvent.pos(); if (m_hoverTimer.isActive()) m_hoverTimer.stop(); cancelFakeMouseMoveEvent(); #if ENABLE(SVG) if (m_svgPan) { static_cast(m_frame->document())->updatePan(m_currentMousePosition); return true; } #endif if (m_frameSetBeingResized) return dispatchMouseEvent(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false); // Send events right to a scrollbar if the mouse is pressed. if (m_lastScrollbarUnderMouse && m_mousePressed) return m_lastScrollbarUnderMouse->mouseMoved(mouseEvent); // Treat mouse move events while the mouse is pressed as "read-only" in prepareMouseEvent // if we are allowed to select. // This means that :hover and :active freeze in the state they were in when the mouse // was pressed, rather than updating for nodes the mouse moves over as you hold the mouse down. HitTestRequest::HitTestRequestType hitType = HitTestRequest::MouseMove; if (m_mousePressed && m_mouseDownMayStartSelect) hitType |= HitTestRequest::ReadOnly; if (m_mousePressed) hitType |= HitTestRequest::Active; #if ENABLE(TOUCH_EVENTS) // Treat any mouse move events as readonly if the user is currently touching the screen. if (m_touchPressed) hitType |= HitTestRequest::Active | HitTestRequest::ReadOnly; #endif HitTestRequest request(hitType); MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); if (hoveredNode) *hoveredNode = mev.hitTestResult(); Scrollbar* scrollbar = 0; if (m_resizeLayer && m_resizeLayer->inResizeMode()) m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner); else { if (FrameView* view = m_frame->view()) scrollbar = view->scrollbarAtPoint(mouseEvent.pos()); if (!scrollbar) scrollbar = mev.scrollbar(); updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed); } bool swallowEvent = false; RefPtr 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(targetNode(mev), mouseEvent, true); // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target // node to be detached from its FrameView, in which case the event should not be passed. if (newSubframe->view()) swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode); } else { if (scrollbar && !m_mousePressed) scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering. if (Page* page = m_frame->page()) { if ((!m_resizeLayer || !m_resizeLayer->inResizeMode()) && !page->mainFrame()->eventHandler()->panScrollInProgress()) { // Plugins set cursor on their own. The only case WebKit intervenes is resetting cursor to arrow on mouse enter, // in case the particular plugin doesn't manipulate cursor at all. Thus, even a CSS cursor set on body has no // effect on plugins (which matches Firefox). bool overPluginElement = false; if (targetNode(mev) && targetNode(mev)->isHTMLElement()) { HTMLElement* el = toHTMLElement(targetNode(mev)); overPluginElement = el->hasTagName(appletTag) || el->hasTagName(objectTag) || el->hasTagName(embedTag); } if (!overPluginElement) { if (FrameView* view = m_frame->view()) view->setCursor(selectCursor(mev, scrollbar)); } } } } m_lastMouseMoveEventSubframe = newSubframe; if (swallowEvent) return true; swallowEvent = dispatchMouseEvent(eventNames().mousemoveEvent, targetNode(mev), 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()); UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); #if ENABLE(PAN_SCROLLING) if (mouseEvent.button() == MiddleButton) m_panScrollButtonPressed = false; if (m_springLoadedPanScrollInProgress) stopAutoscrollTimer(); #endif m_mousePressed = false; m_currentMousePosition = mouseEvent.pos(); #if ENABLE(SVG) if (m_svgPan) { m_svgPan = false; static_cast(m_frame->document())->updatePan(m_currentMousePosition); return true; } #endif if (m_frameSetBeingResized) return dispatchMouseEvent(eventNames().mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false); if (m_lastScrollbarUnderMouse) { invalidateClick(); return m_lastScrollbarUnderMouse->mouseUp(); } #if ENABLE(COMPOSITED_FIXED_ELEMENTS) // Add IgnoreClipping because fixed position elements are moved only on the // UI thread. Nodes in fixed position elements are clipped out by the view // without IgnoreClipping. HitTestRequest request(HitTestRequest::MouseUp | HitTestRequest::IgnoreClipping); #else HitTestRequest request(HitTestRequest::MouseUp); #endif 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, targetNode(mev), true, m_clickCount, mouseEvent, false); bool swallowClickEvent = m_clickCount > 0 && mouseEvent.button() != RightButton && targetNode(mev) == m_clickNode && dispatchMouseEvent(eventNames().clickEvent, targetNode(mev), true, m_clickCount, mouseEvent, true); if (m_resizeLayer) { m_resizeLayer->setInResizeMode(false); m_resizeLayer = 0; } bool swallowMouseReleaseEvent = false; if (!swallowMouseUpEvent) swallowMouseReleaseEvent = handleMouseReleaseEvent(mev); invalidateClick(); return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent; } #if ENABLE(DRAG_SUPPORT) bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard) { FrameView* view = m_frame->view(); // FIXME: We might want to dispatch a dragleave even if the view is gone. if (!view) return false; view->resetDeferredRepaintDelay(); RefPtr me = MouseEvent::create(eventType, true, true, m_frame->document()->defaultView(), 0, event.globalX(), event.globalY(), event.x(), event.y(), event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), 0, 0, clipboard); ExceptionCode ec; dragTarget->dispatchEvent(me.get(), ec); return me->defaultPrevented(); } bool EventHandler::canHandleDragAndDropForTarget(DragAndDropHandleType type, Node* target, const PlatformMouseEvent& event, Clipboard* clipboard, bool* accepted) { bool canHandle = false; bool wasAccepted = false; if (target->hasTagName(frameTag) || target->hasTagName(iframeTag)) { Frame* frame = static_cast(target)->contentFrame(); if (frame) { switch (type) { case UpdateDragAndDrop: wasAccepted = frame->eventHandler()->updateDragAndDrop(event, clipboard); break; case CancelDragAndDrop: frame->eventHandler()->cancelDragAndDrop(event, clipboard); break; case PerformDragAndDrop: wasAccepted = frame->eventHandler()->performDragAndDrop(event, clipboard); break; } } } else canHandle = true; if (accepted) *accepted = wasAccepted; return canHandle; } bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) { bool accept = false; if (!m_frame->view()) return false; HitTestRequest request(HitTestRequest::ReadOnly); MouseEventWithHitTestResults mev = prepareMouseEvent(request, event); // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch) Node* newTarget = targetNode(mev); if (newTarget && newTarget->isTextNode()) newTarget = newTarget->parentNode(); if (newTarget) newTarget = newTarget->shadowAncestorNode(); if (m_dragTarget != newTarget) { // FIXME: this ordering was explicitly chosen to match WinIE. However, // it is sometimes incorrect when dragging within subframes, as seen with // LayoutTests/fast/events/drag-in-frames.html. // // Moreover, this ordering conforms to section 7.9.4 of the HTML 5 spec. . if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) { // As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event. if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) { // for now we don't care if event handler cancels default behavior, since there is none dispatchDragSrcEvent(eventNames().dragEvent, event); } accept = dispatchDragEvent(eventNames().dragenterEvent, newTarget, event, clipboard); } if (m_dragTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, m_dragTarget.get(), event, clipboard, &accept)) dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard); if (newTarget) { // We do not explicitly call dispatchDragEvent here because it could ultimately result in the appearance that // two dragover events fired. So, we mark that we should only fire a dragover event on the next call to this function. m_shouldOnlyFireDragOverEvent = true; } } else { if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) { // Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier. if (!m_shouldOnlyFireDragOverEvent && dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) { // for now we don't care if event handler cancels default behavior, since there is none dispatchDragSrcEvent(eventNames().dragEvent, event); } accept = dispatchDragEvent(eventNames().dragoverEvent, newTarget, event, clipboard); m_shouldOnlyFireDragOverEvent = false; } } m_dragTarget = newTarget; return accept; } void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) { if (m_dragTarget && canHandleDragAndDropForTarget(CancelDragAndDrop, m_dragTarget.get(), event, clipboard)) { if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) dispatchDragSrcEvent(eventNames().dragEvent, event); dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard); } clearDragState(); } bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) { bool accept = false; if (m_dragTarget && canHandleDragAndDropForTarget(PerformDragAndDrop, m_dragTarget.get(), event, clipboard, &accept)) dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard); clearDragState(); return accept; } void EventHandler::clearDragState() { m_dragTarget = 0; m_capturingMouseEventsNode = 0; m_shouldOnlyFireDragOverEvent = false; #if PLATFORM(MAC) m_sendingEventToSubview = false; #endif } #endif // ENABLE(DRAG_SUPPORT) #if PLATFORM(ANDROID) && ENABLE(TOUCH_EVENTS) void EventHandler::setCapturingTouchEventsNode(PassRefPtr n) { m_capturingTouchEventsNode = n; } #endif 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.pos()), mev); } #if ENABLE(SVG) static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode) { if (!referenceNode || !referenceNode->isSVGElement()) return 0; Node* shadowTreeElement = referenceNode->shadowTreeRootNode(); if (!shadowTreeElement) return 0; Element* shadowTreeParentElement = shadowTreeElement->shadowHost(); if (!shadowTreeParentElement) return 0; ASSERT(shadowTreeParentElement->hasTagName(useTag)); 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()) result = result->parentNode(); } 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->scrollAnimator()->mouseExitedContentArea(); } } else if (page && (layerForLastNode && (!layerForNodeUnderMouse || layerForNodeUnderMouse != layerForLastNode))) { // The mouse has moved between layers. if (page->containsScrollableArea(layerForLastNode)) layerForLastNode->scrollAnimator()->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->scrollAnimator()->mouseEnteredContentArea(); } } else if (page && (layerForNodeUnderMouse && (!layerForLastNode || layerForNodeUnderMouse != layerForLastNode))) { // The mouse has moved between layers. if (page->containsScrollableArea(layerForNodeUnderMouse)) layerForNodeUnderMouse->scrollAnimator()->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.pos())) return false; } // The layout needs to be up to date to determine if an element is focusable. m_frame->document()->updateLayoutIgnorePendingStylesheets(); // Blur current focus node when a link/button is clicked; this // is expected by some sites that rely on onChange handlers running // from form fields before the button click is processed. Node* node = m_nodeUnderMouse.get(); // 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() ? node->shadowHost() : node; if (m_frame->selection()->isRange() && m_frame->selection()->toNormalizedRange()->compareNode(n, ec) == Range::NODE_INSIDE && n->isDescendantOf(m_frame->document()->focusedNode())) return false; break; } node = node->parentOrHostNode(); } // If focus shift is blocked, we eat the event. Note we should never clear swallowEvent // if the page already set it (e.g., by canceling default behavior). if (Page* page = m_frame->page()) { if (node && node->isMouseFocusable()) { if (!page->focusController()->setFocusedNode(node, m_frame)) swallowEvent = true; } else if (!node || !node->focused()) { if (!page->focusController()->setFocusedNode(0, m_frame)) swallowEvent = true; } } } return swallowEvent; } #if !PLATFORM(GTK) && !(PLATFORM(CHROMIUM) && (OS(LINUX) || OS(FREEBSD))) bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult&) const { return false; } #endif bool EventHandler::handleWheelEvent(PlatformWheelEvent& e) { Document* doc = m_frame->document(); RenderObject* docRenderer = doc->renderer(); if (!docRenderer) return false; RefPtr protector(m_frame->view()); FrameView* view = m_frame->view(); if (!view) return false; setFrameWasScrolledByUser(); IntPoint vPoint = view->windowToContents(e.pos()); Node* node; bool isOverWidget; HitTestRequest request(HitTestRequest::ReadOnly); HitTestResult result(vPoint); doc->renderView()->layer()->hitTest(request, result); #if PLATFORM(MAC) m_useLatchedWheelEventNode = e.momentumPhase() == PlatformWheelEventPhaseBegan || e.momentumPhase() == PlatformWheelEventPhaseChanged; #endif if (m_useLatchedWheelEventNode) { if (!m_latchedWheelEventNode) { m_latchedWheelEventNode = result.innerNode(); m_widgetIsLatched = result.isOverWidget(); } node = m_latchedWheelEventNode.get(); isOverWidget = m_widgetIsLatched; } else { if (m_latchedWheelEventNode) m_latchedWheelEventNode = 0; if (m_previousWheelScrolledNode) m_previousWheelScrolledNode = 0; node = result.innerNode(); isOverWidget = result.isOverWidget(); } if (shouldTurnVerticalTicksIntoHorizontal(result)) e.turnVerticalTicksIntoHorizontal(); if (node) { // Figure out which view to send the event to. RenderObject* target = node->renderer(); if (isOverWidget && target && target->isWidget()) { Widget* widget = toRenderWidget(target)->widget(); if (widget && passWheelEventToWidget(e, widget)) { e.accept(); return true; } } node = node->shadowAncestorNode(); if (!node->dispatchWheelEvent(e)) { e.accept(); return true; } } if (e.isAccepted()) return true; view = m_frame->view(); if (!view) return false; view->wheelEvent(e); return e.isAccepted(); } void EventHandler::defaultWheelEventHandler(Node* startNode, WheelEvent* wheelEvent) { if (!startNode || !wheelEvent) return; Node* stopNode = m_previousWheelScrolledNode.get(); // Break up into two scrolls if we need to. Diagonal movement on // a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set). if (scrollNode(wheelEvent->rawDeltaX(), wheelEvent->granularity(), ScrollLeft, ScrollRight, startNode, &stopNode)) wheelEvent->setDefaultHandled(); if (scrollNode(wheelEvent->rawDeltaY(), wheelEvent->granularity(), ScrollUp, ScrollDown, startNode, &stopNode)) wheelEvent->setDefaultHandled(); if (!m_useLatchedWheelEventNode) m_previousWheelScrolledNode = stopNode; } #if ENABLE(GESTURE_EVENTS) bool EventHandler::handleGestureEvent(const PlatformGestureEvent& gestureEvent) { // FIXME: This should hit test and go to the correct subframe rather than // always sending gestures to the main frame only. We should also ensure // that if a frame gets a gesture begin gesture, it gets the corresponding // end gesture as well. FrameView* view = m_frame->view(); if (!view) return false; view->handleGestureEvent(gestureEvent); return true; } #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; bool swallowEvent; IntPoint viewportPos = v->windowToContents(event.pos()); HitTestRequest request(HitTestRequest::Active); MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event); if (m_frame->editor()->behavior().shouldSelectOnContextualMenuClick() && !m_frame->selection()->contains(viewportPos) // FIXME: In the editable case, word selection sometimes selects content that isn't underneath the mouse. // If the selection is non-editable, we do word selection to make it easier to use the contextual menu items // available for text selections. But only if we're above text. && (m_frame->selection()->isContentEditable() || (targetNode(mev) && targetNode(mev)->isTextNode()))) { m_mouseDownMayStartSelect = true; // context menu events are always allowed to perform a selection selectClosestWordOrLinkFromMouseEvent(mev); } swallowEvent = dispatchMouseEvent(eventNames().contextmenuEvent, targetNode(mev), true, 0, event, false); return swallowEvent; } bool EventHandler::sendContextMenuEventForKey() { FrameView* view = m_frame->view(); if (!view) return false; Document* doc = m_frame->document(); if (!doc) return false; static const int kContextMenuMargin = 1; #if OS(WINDOWS) && !OS(WINCE) int rightAligned = ::GetSystemMetrics(SM_MENUDROPALIGNMENT); #else int rightAligned = 0; #endif IntPoint location; Node* focusedNode = doc->focusedNode(); SelectionController* selectionController = m_frame->selection(); Position start = selectionController->selection().start(); if (start.deprecatedNode() && (selectionController->rootEditableElement() || selectionController->isRange())) { RefPtr selection = selectionController->toNormalizedRange(); IntRect firstRect = m_frame->editor()->firstRectForRange(selection.get()); int x = rightAligned ? firstRect.maxX() : firstRect.x(); location = IntPoint(x, firstRect.maxY()); } else if (focusedNode) { RenderBoxModelObject* box = focusedNode->renderBoxModelObject(); if (!box) return false; IntRect clippedRect = box->absoluteClippedOverflowRect(); location = IntPoint(clippedRect.x(), clippedRect.maxY() - 1); } else { location = IntPoint( rightAligned ? view->contentsWidth() - kContextMenuMargin : kContextMenuMargin, kContextMenuMargin); } m_frame->view()->setCursor(pointerCursor()); IntPoint position = view->contentsToWindow(location); IntPoint globalPosition = view->contentsToScreen(IntRect(location, IntSize())).location(); Node* targetNode = doc->focusedNode(); if (!targetNode) targetNode = doc; // Use the focused node as the target for hover and active. HitTestResult result(position); result.setInnerNode(targetNode); HitTestRequest request(HitTestRequest::Active); doc->renderView()->layer()->updateHoverActiveState(request, result); doc->updateStyleIfNeeded(); // The contextmenu event is a mouse event even when invoked using the keyboard. // This is required for web compatibility. #if OS(WINDOWS) MouseEventType eventType = MouseEventReleased; #else MouseEventType eventType = MouseEventPressed; #endif PlatformMouseEvent mouseEvent(position, globalPosition, RightButton, eventType, 1, false, false, false, false, WTF::currentTime()); return dispatchMouseEvent(eventNames().contextmenuEvent, targetNode, true, 0, mouseEvent, false); } #endif // ENABLE(CONTEXT_MENUS) void EventHandler::scheduleHoverStateUpdate() { if (!m_hoverTimer.isActive()) m_hoverTimer.startOneShot(0); } void EventHandler::dispatchFakeMouseMoveEventSoon() { if (m_mousePressed) return; if (!m_fakeMouseMoveEventTimer.isActive()) m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveInterval); } void EventHandler::dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad& quad) { FrameView* view = m_frame->view(); if (!view) return; if (m_mousePressed || !quad.containsPoint(view->windowToContents(m_currentMousePosition))) return; if (!m_fakeMouseMoveEventTimer.isActive()) m_fakeMouseMoveEventTimer.startOneShot(fakeMouseMoveInterval); } void EventHandler::cancelFakeMouseMoveEvent() { m_fakeMouseMoveEventTimer.stop(); } void EventHandler::fakeMouseMoveEventTimerFired(Timer* timer) { ASSERT_UNUSED(timer, timer == &m_fakeMouseMoveEventTimer); ASSERT(!m_mousePressed); FrameView* view = m_frame->view(); if (!view) return; bool shiftKey; bool ctrlKey; bool altKey; bool metaKey; PlatformKeyboardEvent::getCurrentModifierState(shiftKey, ctrlKey, altKey, metaKey); IntPoint globalPoint = view->contentsToScreen(IntRect(view->windowToContents(m_currentMousePosition), IntSize())).location(); PlatformMouseEvent fakeMouseMoveEvent(m_currentMousePosition, globalPoint, NoButton, MouseEventMoved, 0, shiftKey, ctrlKey, altKey, metaKey, currentTime()); mouseMoved(fakeMouseMoveEvent); } // Whether or not a mouse down can begin the creation of a selection. Fires the selectStart event. bool EventHandler::canMouseDownStartSelect(Node* node) { if (!node || !node->renderer()) return true; // Some controls and images can't start a select on a mouse down. if (!node->canStartSelection()) return false; return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true)); } #if ENABLE(DRAG_SUPPORT) bool EventHandler::canMouseDragExtendSelect(Node* node) { if (!node || !node->renderer()) return true; return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true)); } #endif // ENABLE(DRAG_SUPPORT) void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet) { m_frameSetBeingResized = frameSet; } void EventHandler::resizeLayerDestroyed() { ASSERT(m_resizeLayer); m_resizeLayer = 0; } void EventHandler::hoverTimerFired(Timer*) { m_hoverTimer.stop(); ASSERT(m_frame); ASSERT(m_frame->document()); if (RenderView* renderer = m_frame->contentRenderer()) { if (FrameView* view = m_frame->view()) { HitTestRequest request(HitTestRequest::MouseMove); HitTestResult result(view->windowToContents(m_currentMousePosition)); renderer->layer()->hitTest(request, result); m_frame->document()->updateStyleIfNeeded(); } } } static Node* eventTargetNodeForDocument(Document* doc) { if (!doc) return 0; Node* node = doc->focusedNode(); if (!node && doc->isPluginDocument()) { PluginDocument* pluginDocument = static_cast(doc); node = pluginDocument->pluginNode(); } if (!node && doc->isHTMLDocument()) node = doc->body(); if (!node) node = doc->documentElement(); return node; } bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt) { // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do. // IE matches lower and upper case access keys regardless of Shift key state - but if both upper and // lower case variants are present in a document, the correct element is matched based on Shift key state. // Firefox only matches an access key if Shift is not pressed, and does that case-insensitively. ASSERT(!(accessKeyModifiers() & PlatformKeyboardEvent::ShiftKey)); if ((evt.modifiers() & ~PlatformKeyboardEvent::ShiftKey) != accessKeyModifiers()) return false; String key = evt.unmodifiedText(); Element* elem = m_frame->document()->getElementByAccessKey(key.lower()); if (!elem) return false; elem->accessKeyAction(false); return true; } #if !PLATFORM(MAC) bool EventHandler::needsKeyboardEventDisambiguationQuirks() const { return false; } #endif bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent) { RefPtr protector(m_frame->view()); if (initialKeyEvent.windowsVirtualKeyCode() == VK_CAPITAL) capsLockStateMayHaveChanged(); #if ENABLE(PAN_SCROLLING) if (Page* page = m_frame->page()) { if (page->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) { // If a key is pressed while the autoscroll/panScroll is in progress then we want to stop if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown || initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) stopAutoscrollTimer(); // If we were in autoscroll/panscroll mode, we swallow the key event return true; } } #endif // Check for cases where we are too early for events -- possible unmatched key up // from pressing return in the location bar. RefPtr node = eventTargetNodeForDocument(m_frame->document()); if (!node) return false; UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture); UserTypingGestureIndicator typingGestureIndicator(m_frame); if (FrameView* view = m_frame->view()) view->resetDeferredRepaintDelay(); // FIXME: what is this doing here, in keyboard event handler? m_frame->loader()->resetMultipleFormSubmissionProtection(); // In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match. // On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict // with access keys. Then we dispatch keydown, but suppress its default handling. // On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages. // Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events. bool matchedAnAccessKey = false; if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown) matchedAnAccessKey = handleAccessKey(initialKeyEvent); // FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch. if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp || initialKeyEvent.type() == PlatformKeyboardEvent::Char) return !node->dispatchKeyEvent(initialKeyEvent); bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks(); ExceptionCode ec; PlatformKeyboardEvent keyDownEvent = initialKeyEvent; if (keyDownEvent.type() != PlatformKeyboardEvent::RawKeyDown) keyDownEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::RawKeyDown, backwardCompatibilityMode); RefPtr keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView()); if (matchedAnAccessKey) keydown->setDefaultPrevented(true); keydown->setTarget(node); if (initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) { node->dispatchEvent(keydown, ec); // If frame changed as a result of keydown dispatch, then return true to avoid sending a subsequent keypress message to the new frame. bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame(); return keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame; } // Run input method in advance of DOM event handling. This may result in the IM // modifying the page prior the keydown event, but this behaviour is necessary // in order to match IE: // 1. preventing default handling of keydown and keypress events has no effect on IM input; // 2. if an input method handles the event, its keyCode is set to 229 in keydown event. m_frame->editor()->handleInputMethodKeydown(keydown.get()); bool handledByInputMethod = keydown->defaultHandled(); if (handledByInputMethod) { keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode); keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView()); keydown->setTarget(node); keydown->setDefaultHandled(); } node->dispatchEvent(keydown, ec); // If frame changed as a result of keydown dispatch, then return early to avoid sending a subsequent keypress message to the new frame. bool changedFocusedFrame = m_frame->page() && m_frame != m_frame->page()->focusController()->focusedOrMainFrame(); bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented() || changedFocusedFrame; if (handledByInputMethod || (keydownResult && !backwardCompatibilityMode)) return keydownResult; // Focus may have changed during keydown handling, so refetch node. // But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original node. if (!keydownResult) { node = eventTargetNodeForDocument(m_frame->document()); if (!node) return false; } PlatformKeyboardEvent keyPressEvent = initialKeyEvent; keyPressEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::Char, backwardCompatibilityMode); if (keyPressEvent.text().isEmpty()) return keydownResult; RefPtr keypress = KeyboardEvent::create(keyPressEvent, m_frame->document()->defaultView()); keypress->setTarget(node); if (keydownResult) keypress->setDefaultPrevented(true); #if PLATFORM(MAC) keypress->keypressCommands() = keydown->keypressCommands(); #endif node->dispatchEvent(keypress, ec); return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled(); } void EventHandler::handleKeyboardSelectionMovement(KeyboardEvent* event) { if (!event) return; const String& key = event->keyIdentifier(); bool isShifted = event->getModifierState("Shift"); bool isOptioned = event->getModifierState("Alt"); bool isCommanded = event->getModifierState("Meta"); if (key == "Up") { m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionBackward, (isCommanded) ? DocumentBoundary : LineGranularity, true); event->setDefaultHandled(); } else if (key == "Down") { m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionForward, (isCommanded) ? DocumentBoundary : LineGranularity, true); event->setDefaultHandled(); } else if (key == "Left") { m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionLeft, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true); event->setDefaultHandled(); } else if (key == "Right") { m_frame->selection()->modify((isShifted) ? SelectionController::AlterationExtend : SelectionController::AlterationMove, DirectionRight, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true); event->setDefaultHandled(); } } void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event) { if (event->type() == eventNames().keydownEvent) { m_frame->editor()->handleKeyboardEvent(event); if (event->defaultHandled()) return; if (event->keyIdentifier() == "U+0009") defaultTabEventHandler(event); else 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(event); } if (event->type() == eventNames().keypressEvent) { m_frame->editor()->handleKeyboardEvent(event); if (event->defaultHandled()) return; if (event->charCode() == ' ') defaultSpaceEventHandler(event); } } FocusDirection EventHandler::focusDirectionForKey(const AtomicString& keyIdentifier) const { DEFINE_STATIC_LOCAL(AtomicString, Down, ("Down")); DEFINE_STATIC_LOCAL(AtomicString, Up, ("Up")); DEFINE_STATIC_LOCAL(AtomicString, Left, ("Left")); DEFINE_STATIC_LOCAL(AtomicString, Right, ("Right")); FocusDirection retVal = FocusDirectionNone; if (keyIdentifier == Down) retVal = FocusDirectionDown; else if (keyIdentifier == Up) retVal = FocusDirectionUp; else if (keyIdentifier == Left) retVal = FocusDirectionLeft; else if (keyIdentifier == Right) retVal = FocusDirectionRight; return retVal; } #if ENABLE(DRAG_SUPPORT) bool EventHandler::dragHysteresisExceeded(const FloatPoint& floatDragViewportLocation) const { IntPoint dragViewportLocation((int)floatDragViewportLocation.x(), (int)floatDragViewportLocation.y()); return dragHysteresisExceeded(dragViewportLocation); } bool EventHandler::dragHysteresisExceeded(const IntPoint& dragViewportLocation) const { FrameView* view = m_frame->view(); if (!view) return false; IntPoint dragLocation = view->windowToContents(dragViewportLocation); IntSize delta = dragLocation - m_mouseDownPos; int threshold = GeneralDragHysteresis; if (dragState().m_dragSrcIsImage) threshold = ImageDragHysteresis; else if (dragState().m_dragSrcIsLink) threshold = LinkDragHysteresis; else if (dragState().m_dragSrcInSelection) threshold = TextDragHysteresis; return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold; } void EventHandler::freeClipboard() { if (dragState().m_dragClipboard) dragState().m_dragClipboard->setAccessPolicy(ClipboardNumb); } bool EventHandler::shouldDragAutoNode(Node* node, const IntPoint& point) const { if (!node || !m_frame->view()) return false; Page* page = m_frame->page(); return page && page->dragController()->mayStartDragAtEventLocation(m_frame, point, node); } void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation) { if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) { dragState().m_dragClipboard->setDestinationOperation(operation); // for now we don't care if event handler cancels default behavior, since there is none dispatchDragSrcEvent(eventNames().dragendEvent, event); } freeClipboard(); dragState().m_dragSrc = 0; // In case the drag was ended due to an escape key press we need to ensure // that consecutive mousemove events don't reinitiate the drag and drop. m_mouseDownMayStartDrag = false; } // returns if we should continue "default processing", i.e., whether eventhandler canceled bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event) { return !dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragClipboard.get()); } bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event) { if (event.event().button() != LeftButton || event.event().eventType() != MouseEventMoved) { // If we allowed the other side of the bridge to handle a drag // last time, then m_mousePressed might still be set. So we // clear it now to make sure the next move after a drag // doesn't look like a drag. m_mousePressed = false; return false; } if (eventLoopHandleMouseDragged(event)) return true; // Careful that the drag starting logic stays in sync with eventMayStartDrag() if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) { allowDHTMLDrag(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA); if (!dragState().m_dragSrcMayBeDHTML && !dragState().m_dragSrcMayBeUA) m_mouseDownMayStartDrag = false; // no element is draggable } if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) { // try to find an element that wants to be dragged HitTestRequest request(HitTestRequest::ReadOnly); HitTestResult result(m_mouseDownPos); m_frame->contentRenderer()->layer()->hitTest(request, result); Node* node = result.innerNode(); if (node && node->renderer()) dragState().m_dragSrc = node->renderer()->draggableNode(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA, m_mouseDownPos.x(), m_mouseDownPos.y(), dragState().m_dragSrcIsDHTML); else dragState().m_dragSrc = 0; if (!dragState().m_dragSrc) m_mouseDownMayStartDrag = false; // no element is draggable else { // remember some facts about this source, while we have a HitTestResult handy node = result.URLElement(); dragState().m_dragSrcIsLink = node && node->isLink(); node = result.innerNonSharedNode(); dragState().m_dragSrcIsImage = node && node->renderer() && node->renderer()->isImage(); dragState().m_dragSrcInSelection = m_frame->selection()->contains(m_mouseDownPos); } } // For drags starting in the selection, the user must wait between the mousedown and mousedrag, // or else we bail on the dragging stuff and allow selection to occur if (m_mouseDownMayStartDrag && !dragState().m_dragSrcIsImage && dragState().m_dragSrcInSelection && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) { m_mouseDownMayStartDrag = false; dragState().m_dragSrc = 0; // ...but if this was the first click in the window, we don't even want to start selection if (eventActivatedView(event.event())) m_mouseDownMayStartSelect = false; } if (!m_mouseDownMayStartDrag) return !mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll; // We are starting a text/image/url drag, so the cursor should be an arrow if (FrameView* view = m_frame->view()) { // FIXME : Custom cursors aren't supported during drag and drop (default to pointer). view->setCursor(pointerCursor()); } if (!dragHysteresisExceeded(event.event().pos())) return true; // Once we're past the hysteresis point, we don't want to treat this gesture as a click invalidateClick(); DragOperation srcOp = DragOperationNone; freeClipboard(); // would only happen if we missed a dragEnd. Do it anyway, just // to make sure it gets numbified dragState().m_dragClipboard = createDraggingClipboard(); if (dragState().m_dragSrcMayBeDHTML) { // Check to see if the is a DOM based drag, if it is get the DOM specified drag // image and offset if (dragState().m_dragSrcIsDHTML) { if (RenderObject* renderer = dragState().m_dragSrc->renderer()) { // FIXME: This doesn't work correctly with transforms. FloatPoint absPos = renderer->localToAbsolute(); IntSize delta = m_mouseDownPos - roundedIntPoint(absPos); dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), toPoint(delta)); } else { // The renderer has disappeared, this can happen if the onStartDrag handler has hidden // the element in some way. In this case we just kill the drag. m_mouseDownMayStartDrag = false; goto cleanupDrag; } } m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown) && !m_frame->selection()->isInPasswordField(); // Invalidate clipboard here against anymore pasteboard writing for security. The drag // image can still be changed as we drag, but not the pasteboard data. dragState().m_dragClipboard->setAccessPolicy(ClipboardImageWritable); if (m_mouseDownMayStartDrag) { // gather values from DHTML element, if it set any srcOp = dragState().m_dragClipboard->sourceOperation(); // Yuck, a draggedImage:moveTo: message can be fired as a result of kicking off the // drag with dragImage! Because of that dumb reentrancy, we may think we've not // started the drag when that happens. So we have to assume it's started before we // kick it off. dragState().m_dragClipboard->setDragHasStarted(); } } if (m_mouseDownMayStartDrag) { Page* page = m_frame->page(); DragController* dragController = page ? page->dragController() : 0; bool startedDrag = dragController && dragController->startDrag(m_frame, dragState().m_dragClipboard.get(), srcOp, event.event(), m_mouseDownPos, dragState().m_dragSrcIsDHTML); if (!startedDrag && dragState().m_dragSrcMayBeDHTML) { // Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event dispatchDragSrcEvent(eventNames().dragendEvent, event.event()); m_mouseDownMayStartDrag = false; } } cleanupDrag: if (!m_mouseDownMayStartDrag) { // something failed to start the drag, cleanup freeClipboard(); dragState().m_dragSrc = 0; } // No more default handling (like selection), whether we're past the hysteresis bounds or not return true; } #endif // ENABLE(DRAG_SUPPORT) bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, 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->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"; } static bool eventInvertsTabsToLinksClientCallResult(KeyboardEvent* event) { #if PLATFORM(MAC) || PLATFORM(QT) || PLATFORM(HAIKU) || 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) || PLATFORM(ANDROID) // 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; Page* page = m_frame->page(); if (!page) 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(), EventQueue::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(); 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; default: ASSERT_NOT_REACHED(); return emptyAtom; } } 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); for (unsigned i = 0; i < points.size(); ++i) { const PlatformTouchPoint& point = points[i]; PlatformTouchPoint::State pointState = point.state(); IntPoint pagePoint = documentPointForWindowPoint(m_frame, point.pos()); HitTestRequest::HitTestRequestType hitType = HitTestRequest::Active | HitTestRequest::ReadOnly; // The HitTestRequest types used for mouse events map quite adequately // to touch events. Note that in addition to meaning that the hit test // should affect the active state of the current node if necessary, // HitTestRequest::Active signifies that the hit test is taking place // with the mouse (or finger in this case) being pressed. switch (pointState) { case PlatformTouchPoint::TouchPressed: hitType = HitTestRequest::Active; break; case PlatformTouchPoint::TouchMoved: hitType = HitTestRequest::Active | HitTestRequest::MouseMove | HitTestRequest::ReadOnly; break; case PlatformTouchPoint::TouchReleased: case PlatformTouchPoint::TouchCancelled: hitType = HitTestRequest::MouseUp; break; default: break; } #if PLATFORM(ANDROID) Node* node = 0; if (m_capturingTouchEventsNode) node = m_capturingTouchEventsNode.get(); else { HitTestResult result = hitTestResultAtPoint(pagePoint, /*allowShadowContent*/ false, false, DontHitTestScrollbars, hitType); node = result.innerNode(); ASSERT(node); // Touch events should not go to text nodes if (node->isTextNode()) node = node->parentNode(); } #else HitTestResult result = hitTestResultAtPoint(pagePoint, /*allowShadowContent*/ false, false, DontHitTestScrollbars, hitType); Node* node = result.innerNode(); ASSERT(node); // Touch events should not go to text nodes if (node->isTextNode()) node = node->parentNode(); #endif Document* doc = node->document(); if (!doc) continue; if (!doc->hasListenerType(Document::TOUCH_LISTENER)) continue; if (m_frame != doc->frame()) { // pagePoint should always be relative to the target elements containing frame. pagePoint = documentPointForWindowPoint(doc->frame(), point.pos()); } int adjustedPageX = lroundf(pagePoint.x() / m_frame->pageZoomFactor()); int adjustedPageY = lroundf(pagePoint.y() / m_frame->pageZoomFactor()); // 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 PLATFORM(ANDROID) if (m_capturingTouchEventsNode) touchTarget = node; else { #endif if (pointState == PlatformTouchPoint::TouchPressed) { m_originatingTouchPointTargets.set(touchPointTargetKey, node); touchTarget = node; } else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) { // The target should be the original target for this touch, so get it from the hashmap. As it's a release or cancel // we also remove it from the map. touchTarget = m_originatingTouchPointTargets.take(touchPointTargetKey); } else touchTarget = m_originatingTouchPointTargets.get(touchPointTargetKey); #if PLATFORM(ANDROID) } #endif if (!touchTarget.get()) continue; RefPtr touch = Touch::create(doc->frame(), touchTarget.get(), point.id(), point.screenPos().x(), point.screenPos().y(), adjustedPageX, adjustedPageY); // 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()).first; // 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->second->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; // Now iterate the changedTouches list and m_targets within it, sending events to the tagets as required. bool defaultPrevented = 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); defaultPrevented |= touchEvent->defaultPrevented(); #if PLATFORM(ANDROID) if (touchEvent->hitTouchHandler()) const_cast(event).setHitTouchHandler(); #endif } } #if ENABLE(GESTURE_RECOGNIZER) if (m_gestureRecognizer) m_gestureRecognizer->processTouchEventForGesture(event, this, defaultPrevented); #endif return defaultPrevented; } #endif }