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Diffstat (limited to 'webkit/pending/EventHandler.cpp')
| -rw-r--r-- | webkit/pending/EventHandler.cpp | 2142 |
1 files changed, 0 insertions, 2142 deletions
diff --git a/webkit/pending/EventHandler.cpp b/webkit/pending/EventHandler.cpp deleted file mode 100644 index 4570913..0000000 --- a/webkit/pending/EventHandler.cpp +++ /dev/null @@ -1,2142 +0,0 @@ -/* - * Copyright (C) 2006, 2007, 2008 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 "ChromeClient.h" -#include "Cursor.h" -#include "Document.h" -#include "DragController.h" -#include "Editor.h" -#include "EventNames.h" -#include "FloatPoint.h" -#include "FloatRect.h" -#include "FocusController.h" -#include "Frame.h" -#include "FrameLoader.h" -#include "FrameTree.h" -#include "FrameView.h" -#include "HitTestRequest.h" -#include "HitTestResult.h" -#include "HTMLFrameSetElement.h" -#include "HTMLFrameElementBase.h" -#include "HTMLInputElement.h" -#include "HTMLNames.h" -#include "Image.h" -#include "KeyboardEvent.h" -#include "MouseEvent.h" -#include "MouseEventWithHitTestResults.h" -#include "Page.h" -#include "PlatformKeyboardEvent.h" -#include "PlatformScrollBar.h" -#include "PlatformWheelEvent.h" -#include "RenderFrameSet.h" -#include "RenderWidget.h" -#include "RenderView.h" -#include "SelectionController.h" -#include "Settings.h" -#include "TextEvent.h" - -#if ENABLE(SVG) -#include "SVGDocument.h" -#include "SVGNames.h" -#endif - -namespace WebCore { - -using namespace EventNames; -using namespace HTMLNames; - -// 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; - -// 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; - -static Frame* subframeForTargetNode(Node* node); - -static inline void scrollAndAcceptEvent(float delta, ScrollDirection positiveDirection, ScrollDirection negativeDirection, bool pageScrollEnabled, PlatformWheelEvent& e, Node* node, float windowHeightOrWidth) -{ - if (!delta) - return; - - float pixelsToScroll = delta > 0 ? delta : -delta; - if (!e.isContinuous() && !pageScrollEnabled) { - if (node->renderer()->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByLine, pixelsToScroll)) - e.accept(); - } else { - if (pageScrollEnabled) - pixelsToScroll = windowHeightOrWidth; - if (node->renderer()->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, pixelsToScroll)) - e.accept(); - } -} - -EventHandler::EventHandler(Frame* frame) - : m_frame(frame) - , m_mousePressed(false) - , m_mouseDownMayStartSelect(false) - , m_mouseDownMayStartDrag(false) - , m_mouseDownWasSingleClickInSelection(false) - , m_beganSelectingText(false) - , m_panScrollInProgress(false) - , m_hoverTimer(this, &EventHandler::hoverTimerFired) - , m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired) - , m_autoscrollRenderer(0) - , m_autoscrollInProgress(false) - , m_mouseDownMayStartAutoscroll(false) - , m_mouseDownWasInSubframe(false) -#if ENABLE(SVG) - , m_svgPan(false) -#endif - , m_resizeLayer(0) - , m_capturingMouseEventsNode(0) - , m_clickCount(0) - , m_mouseDownTimestamp(0) - , m_pendingFrameUnloadEventCount(0) - , m_pendingFrameBeforeUnloadEventCount(0) -#if PLATFORM(MAC) - , m_mouseDownView(nil) - , m_sendingEventToSubview(false) - , m_activationEventNumber(0) -#endif -{ -} - -EventHandler::~EventHandler() -{ -} - -EventHandler::EventHandlerDragState& EventHandler::dragState() -{ - static EventHandlerDragState state; - return state; -} - -void EventHandler::clear() -{ - m_hoverTimer.stop(); - m_resizeLayer = 0; - m_nodeUnderMouse = 0; - m_lastNodeUnderMouse = 0; - m_lastMouseMoveEventSubframe = 0; - m_lastScrollbarUnderMouse = 0; - m_clickCount = 0; - m_clickNode = 0; - m_frameSetBeingResized = 0; - m_dragTarget = 0; - m_currentMousePosition = IntPoint(); - m_mousePressNode = 0; - m_mousePressed = false; - m_capturingMouseEventsNode = 0; -} - -void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result) -{ - Node* innerNode = result.targetNode(); - Selection newSelection; - - if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) { - VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); - if (pos.isNotNull()) { - newSelection = Selection(pos); - newSelection.expandUsingGranularity(WordGranularity); - } - - if (newSelection.isRange()) { - m_frame->setSelectionGranularity(WordGranularity); - m_beganSelectingText = true; - } - - if (m_frame->shouldChangeSelection(newSelection)) - m_frame->selection()->setSelection(newSelection); - } -} - -void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result) -{ - if (!result.hitTestResult().isLiveLink()) - return selectClosestWordFromMouseEvent(result); - - Node* innerNode = result.targetNode(); - - if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) { - Selection newSelection; - Element* URLElement = result.hitTestResult().URLElement(); - VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint())); - if (pos.isNotNull() && pos.deepEquivalent().node()->isDescendantOf(URLElement)) - newSelection = Selection::selectionFromContentsOfNode(URLElement); - - if (newSelection.isRange()) { - m_frame->setSelectionGranularity(WordGranularity); - m_beganSelectingText = true; - } - - if (m_frame->shouldChangeSelection(newSelection)) - m_frame->selection()->setSelection(newSelection); - } -} - -bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event) -{ - if (event.event().button() != LeftButton) - return false; - - if (m_frame->selection()->isRange()) - // A double-click when range is already selected - // should not change the selection. So, do not call - // selectClosestWordFromMouseEvent, but do set - // m_beganSelectingText to prevent handleMouseReleaseEvent - // from setting caret selection. - m_beganSelectingText = true; - else - selectClosestWordFromMouseEvent(event); - - return true; -} - -bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event) -{ - if (event.event().button() != LeftButton) - return false; - - Node* innerNode = event.targetNode(); - if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) - return false; - - Selection newSelection; - VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint())); - if (pos.isNotNull()) { - newSelection = Selection(pos); - newSelection.expandUsingGranularity(ParagraphGranularity); - } - if (newSelection.isRange()) { - m_frame->setSelectionGranularity(ParagraphGranularity); - m_beganSelectingText = true; - } - - if (m_frame->shouldChangeSelection(newSelection)) - m_frame->selection()->setSelection(newSelection); - - return true; -} - -bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event) -{ - if (event.event().button() != LeftButton) - return false; - - Node* innerNode = event.targetNode(); - if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect)) - return false; - - // Extend the selection if the Shift key is down, unless the click is in a link. - bool extendSelection = event.event().shiftKey() && !event.isOverLink(); - - // Don't restart the selection when the mouse is pressed on an - // existing selection so we can allow for text dragging. - IntPoint vPoint = m_frame->view()->windowToContents(event.event().pos()); - if (!extendSelection && m_frame->selection()->contains(vPoint)) { - m_mouseDownWasSingleClickInSelection = true; - return false; - } - - VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint())); - if (visiblePos.isNull()) - visiblePos = VisiblePosition(innerNode, 0, DOWNSTREAM); - Position pos = visiblePos.deepEquivalent(); - - Selection newSelection = m_frame->selection()->selection(); - if (extendSelection && newSelection.isCaretOrRange()) { - m_frame->selection()->setLastChangeWasHorizontalExtension(false); - - // See <rdar://problem/3668157> REGRESSION (Mail): shift-click deselects when selection - // was created right-to-left - Position start = newSelection.start(); - Position end = newSelection.end(); - short before = Range::compareBoundaryPoints(pos.node(), pos.offset(), start.node(), start.offset()); - if (before <= 0) - newSelection = Selection(pos, end); - else - newSelection = Selection(start, pos); - - if (m_frame->selectionGranularity() != CharacterGranularity) - newSelection.expandUsingGranularity(m_frame->selectionGranularity()); - m_beganSelectingText = true; - } else { - newSelection = Selection(visiblePos); - m_frame->setSelectionGranularity(CharacterGranularity); - } - - if (m_frame->shouldChangeSelection(newSelection)) - m_frame->selection()->setSelection(newSelection); - - return true; -} - -bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event) -{ - // Reset drag state. - dragState().m_dragSrc = 0; - - bool singleClick = event.event().clickCount() <= 1; - - // If we got the event back, that must mean it wasn't prevented, - // so it's allowed to start a drag or selection. - m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode()); - - // Careful that the drag starting logic stays in sync with eventMayStartDrag() - m_mouseDownMayStartDrag = singleClick; - - m_mouseDownWasSingleClickInSelection = false; - - if (passWidgetMouseDownEventToWidget(event)) - return true; - -#if ENABLE(SVG) - if (m_frame->document()->isSVGDocument() && - static_cast<SVGDocument*>(m_frame->document())->zoomAndPanEnabled()) { - if (event.event().shiftKey() && singleClick) { - m_svgPan = true; - static_cast<SVGDocument*>(m_frame->document())->startPan(event.event().pos()); - return true; - } - } -#endif - - // We don't do this at the start of mouse down handling, - // because we don't want to do it until we know we didn't hit a widget. - if (singleClick) - focusDocumentView(); - - Node* innerNode = event.targetNode(); - - m_mousePressNode = innerNode; - m_dragStartPos = event.event().pos(); - - bool swallowEvent = false; - if (event.event().button() == LeftButton || event.event().button() == MiddleButton) { - m_frame->selection()->setCaretBlinkingSuspended(true); - 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->renderer() && m_mousePressNode->renderer()->canBeProgramaticallyScrolled(true)); - - return swallowEvent; -} - -bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event) -{ - if (handleDrag(event)) - return true; - - if (!m_mousePressed) - return false; - - Node* targetNode = event.targetNode(); - if (event.event().button() != LeftButton || !targetNode || !targetNode->renderer()) - return false; - -#if PLATFORM(MAC) // FIXME: Why does this assertion fire on other platforms? - ASSERT(m_mouseDownMayStartSelect || m_mouseDownMayStartAutoscroll); -#endif - - m_mouseDownMayStartDrag = false; - - if (m_mouseDownMayStartAutoscroll && !m_panScrollInProgress) { - // If the selection is contained in a layer that can scroll, that layer should handle the autoscroll - // Otherwise, let the bridge handle it so the view can scroll itself. - RenderObject* renderer = targetNode->renderer(); - while (renderer && !renderer->canBeProgramaticallyScrolled(false)) { - if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement()) - renderer = renderer->document()->ownerElement()->renderer(); - else - renderer = renderer->parent(); - } - - if (renderer) { - m_autoscrollInProgress = true; - handleAutoscroll(renderer); - } - - m_mouseDownMayStartAutoscroll = false; - } - - updateSelectionForMouseDrag(targetNode, event.localPoint()); - return true; -} - -bool EventHandler::eventMayStartDrag(const PlatformMouseEvent& event) const -{ - // This is a pre-flight check of whether the event might lead to a drag being started. Be careful - // that its logic needs to stay in sync with handleMouseMoveEvent() and the way we setMouseDownMayStartDrag - // in handleMousePressEvent - - if (!m_frame->contentRenderer() || !m_frame->contentRenderer()->hasLayer() - || event.button() != LeftButton || event.clickCount() != 1) - return false; - - bool DHTMLFlag; - bool UAFlag; - allowDHTMLDrag(DHTMLFlag, UAFlag); - if (!DHTMLFlag && !UAFlag) - return false; - - HitTestRequest request(true, false); - HitTestResult result(m_frame->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; - RenderObject* renderer = m_frame->contentRenderer(); - if (!renderer) - return; - RenderLayer* layer = renderer->layer(); - if (!layer) - return; - - HitTestResult result(view->windowToContents(m_currentMousePosition)); - layer->hitTest(HitTestRequest(true, true, true), result); - updateSelectionForMouseDrag(result.innerNode(), result.localPoint()); -} - -void EventHandler::updateSelectionForMouseDrag(Node* targetNode, const IntPoint& localPoint) -{ - if (!m_mouseDownMayStartSelect) - return; - - if (!targetNode) - return; - - RenderObject* targetRenderer = targetNode->renderer(); - if (!targetRenderer) - return; - - if (!canMouseDragExtendSelect(targetNode)) - return; - - VisiblePosition targetPosition(targetRenderer->positionForPoint(localPoint)); - - // Don't modify the selection if we're not on a node. - if (targetPosition.isNull()) - return; - - // Restart the selection if this is the first mouse move. This work is usually - // done in handleMousePressEvent, but not if the mouse press was on an existing selection. - Selection newSelection = m_frame->selection()->selection(); - -#if ENABLE(SVG) - // Special case to limit selection to the containing block for SVG text. - // FIXME: Isn't there a better non-SVG-specific way to do this? - if (Node* selectionBaseNode = newSelection.base().node()) - if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer()) - if (selectionBaseRenderer->isSVGText()) - if (targetNode->renderer()->containingBlock() != selectionBaseRenderer->containingBlock()) - return; -#endif - - if (!m_beganSelectingText) { - m_beganSelectingText = true; - newSelection = Selection(targetPosition); - } - - newSelection.setExtent(targetPosition); - if (m_frame->selectionGranularity() != CharacterGranularity) - newSelection.expandUsingGranularity(m_frame->selectionGranularity()); - - if (m_frame->shouldChangeSelection(newSelection)) { - m_frame->selection()->setLastChangeWasHorizontalExtension(false); - m_frame->selection()->setSelection(newSelection); - } -} - -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_mouseDownMayStartDrag = false; - 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. - // 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 - && m_dragStartPos == event.event().pos() - && m_frame->selection()->isRange()) { - Selection newSelection; - Node *node = event.targetNode(); - if (node && node->isContentEditable() && node->renderer()) { - VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint()); - newSelection = Selection(pos); - } - if (m_frame->shouldChangeSelection(newSelection)) - m_frame->selection()->setSelection(newSelection); - - handled = true; - } - - m_frame->notifyRendererOfSelectionChange(true); - - m_frame->selection()->selectFrameElementInParentIfFullySelected(); - - return handled; -} - -void EventHandler::handleAutoscroll(RenderObject* renderer) -{ - // We don't want to trigger the autoscroll or the panScroll if it's already active - if (m_autoscrollTimer.isActive()) - return; - - setAutoscrollRenderer(renderer); - -#if PLATFORM(WIN) - if (m_panScrollInProgress) { - m_panScrollStartPos = currentMousePosition(); - m_frame->view()->printPanScrollIcon(m_panScrollStartPos); - // If we're not in the top frame we notify it that we are using the panScroll - if (m_frame != m_frame->page()->mainFrame()) - m_frame->page()->mainFrame()->eventHandler()->setPanScrollInProgress(true); - } -#endif - - startAutoscrollTimer(); -} - -void EventHandler::autoscrollTimerFired(Timer<EventHandler>*) -{ - RenderObject* r = autoscrollRenderer(); - if (!r) { - stopAutoscrollTimer(); - return; - } - - if (m_autoscrollInProgress) { - if (!m_mousePressed) { - stopAutoscrollTimer(); - return; - } - r->autoscroll(); - } else { - // we verify that the main frame hasn't received the order to stop the panScroll - if (!m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress()) { - stopAutoscrollTimer(); - return; - } -#if PLATFORM(WIN) - setPanScrollCursor(); - r->panScroll(m_panScrollStartPos); -#endif - } -} - -void EventHandler::setPanScrollCursor() -{ - // 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 - const int noScrollRadius = 9; - bool east = m_panScrollStartPos.x() < (m_currentMousePosition.x() - noScrollRadius); - bool west = m_panScrollStartPos.x() > (m_currentMousePosition.x() + noScrollRadius); - bool north = m_panScrollStartPos.y() > (m_currentMousePosition.y() + noScrollRadius); - bool south = m_panScrollStartPos.y() < (m_currentMousePosition.y() - noScrollRadius); - - if (north) { - if (east) - m_frame->view()->setCursor(northEastPanningCursor()); - else if (west) - m_frame->view()->setCursor(northWestPanningCursor()); - else - m_frame->view()->setCursor(northPanningCursor()); - } else if (south) { - if (east) - m_frame->view()->setCursor(southEastPanningCursor()); - else if (west) - m_frame->view()->setCursor(southWestPanningCursor()); - else - m_frame->view()->setCursor(southPanningCursor()); - } else if (east) - m_frame->view()->setCursor(eastPanningCursor()); - else if (west) - m_frame->view()->setCursor(westPanningCursor()); - else - m_frame->view()->setCursor(middlePanningCursor()); -} - -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 && !m_autoscrollRenderer->canBeProgramaticallyScrolled(false)) - m_autoscrollRenderer = m_autoscrollRenderer->parent(); -} - -void EventHandler::setAutoscrollRenderer(RenderObject* renderer) -{ - m_autoscrollRenderer = renderer; -} - -void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const -{ - if (!m_frame || !m_frame->document()) { - flagDHTML = false; - flagUA = false; - } - - unsigned mask = m_frame->page()->dragController()->delegateDragSourceAction(m_frame->view()->contentsToWindow(m_mouseDownPos)); - flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone; - flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection)); -} - -HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent) -{ - HitTestResult result(point); - if (!m_frame->contentRenderer()) - return result; - m_frame->contentRenderer()->layer()->hitTest(HitTestRequest(true, true), result); - - while (true) { - Node* n = result.innerNode(); - if (!n || !n->renderer() || !n->renderer()->isWidget()) - break; - Widget* widget = static_cast<RenderWidget*>(n->renderer())->widget(); - if (!widget || !widget->isFrameView()) - break; - Frame* frame = static_cast<HTMLFrameElementBase*>(n)->contentFrame(); - if (!frame || !frame->contentRenderer()) - break; - FrameView* view = static_cast<FrameView*>(widget); - IntPoint widgetPoint(result.localPoint().x() + view->contentsX() - n->renderer()->borderLeft() - n->renderer()->paddingLeft(), - result.localPoint().y() + view->contentsY() - n->renderer()->borderTop() - n->renderer()->paddingTop()); - HitTestResult widgetHitTestResult(widgetPoint); - frame->contentRenderer()->layer()->hitTest(HitTestRequest(true, true), widgetHitTestResult); - result = widgetHitTestResult; - } - - 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)) - autoscrollRenderer()->stopAutoscroll(); -#if PLATFORM(WIN) - if (m_panScrollInProgress) { - m_frame->view()->removePanScrollIcon(); - } -#endif - - setAutoscrollRenderer(0); - } - - m_autoscrollTimer.stop(); - - m_panScrollInProgress = false; - // If we're not in the top frame we notify it that we are not using the panScroll anymore - if (m_frame->page() && m_frame != m_frame->page()->mainFrame()) - m_frame->page()->mainFrame()->eventHandler()->setPanScrollInProgress(false); - m_autoscrollInProgress = false; -} - -Node* EventHandler::mousePressNode() const -{ - return m_mousePressNode.get(); -} - -void EventHandler::setMousePressNode(PassRefPtr<Node> node) -{ - m_mousePressNode = node; -} - -bool EventHandler::scrollOverflow(ScrollDirection direction, ScrollGranularity granularity) -{ - if (!m_frame->document()) - return false; - - Node* node = m_frame->document()->focusedNode(); - if (!node) - node = m_mousePressNode.get(); - - if (node) { - RenderObject *r = node->renderer(); - if (r && !r->isListBox()) - return r->scroll(direction, granularity); - } - - return false; -} - -IntPoint EventHandler::currentMousePosition() const -{ - return m_currentMousePosition; -} - -Frame* subframeForTargetNode(Node* node) -{ - if (!node) - return 0; - - RenderObject* renderer = node->renderer(); - if (!renderer || !renderer->isWidget()) - return 0; - - Widget* widget = static_cast<RenderWidget*>(renderer)->widget(); - if (!widget || !widget->isFrameView()) - return 0; - - return static_cast<FrameView*>(widget)->frame(); -} - -static bool isSubmitImage(Node* node) -{ - return node && node->hasTagName(inputTag) - && static_cast<HTMLInputElement*>(node)->inputType() == HTMLInputElement::IMAGE; -} - -// Returns true if the node's editable block is not current focused for editing -static bool nodeIsNotBeingEdited(Node* node, Frame* frame) -{ - return frame->selection()->rootEditableElement() != node->rootEditableElement(); -} - -Cursor EventHandler::selectCursor(const MouseEventWithHitTestResults& event, PlatformScrollbar* scrollbar) -{ - // During selection, use an I-beam no matter what we're over. - // If you're capturing mouse events for a particular node, don't treat this as a selection. - if (m_mousePressed && m_mouseDownMayStartSelect && m_frame->selection()->isCaretOrRange() && !m_capturingMouseEventsNode) - return iBeamCursor(); - - Node* node = event.targetNode(); - RenderObject* renderer = node ? node->renderer() : 0; - RenderStyle* style = renderer ? renderer->style() : 0; - - if (renderer && renderer->isFrameSet()) { - RenderFrameSet* fs = static_cast<RenderFrameSet*>(renderer); - if (fs->canResizeRow(event.localPoint())) - return rowResizeCursor(); - if (fs->canResizeColumn(event.localPoint())) - return columnResizeCursor(); - } - - if (style && style->cursors()) { - const CursorList* cursors = style->cursors(); - for (unsigned i = 0; i < cursors->size(); ++i) { - CachedImage* cimage = (*cursors)[i].cursorImage; - IntPoint hotSpot = (*cursors)[i].hotSpot; - if (!cimage) - continue; - // Limit the size of cursors so that they cannot be used to cover UI elements in chrome. - IntSize size = cimage->image()->size(); - if (size.width() > 128 || size.height() > 128) - continue; - // Do not let the hotspot be outside the bounds of the image. - if (hotSpot.x() < 0 || hotSpot.y() < 0 || hotSpot.x() > size.width() || hotSpot.y() > size.height()) - continue; - if (cimage->image()->isNull()) - break; - if (!cimage->errorOccurred()) - return Cursor(cimage->image(), hotSpot); - } - } - - switch (style ? style->cursor() : CURSOR_AUTO) { - case CURSOR_AUTO: { - bool editable = (node && node->isContentEditable()); - bool editableLinkEnabled = false; - - // If the link is editable, then we need to check the settings to see whether or not the link should be followed - if (editable) { - ASSERT(m_frame->settings()); - switch(m_frame->settings()->editableLinkBehavior()) { - default: - case EditableLinkDefaultBehavior: - case EditableLinkAlwaysLive: - editableLinkEnabled = true; - break; - - case EditableLinkNeverLive: - editableLinkEnabled = false; - break; - - case EditableLinkLiveWhenNotFocused: - editableLinkEnabled = nodeIsNotBeingEdited(node, m_frame) || event.event().shiftKey(); - break; - - case EditableLinkOnlyLiveWithShiftKey: - editableLinkEnabled = event.event().shiftKey(); - break; - } - } - - if ((event.isOverLink() || isSubmitImage(node)) && (!editable || editableLinkEnabled)) - return handCursor(); - RenderLayer* layer = renderer ? renderer->enclosingLayer() : 0; - bool inResizer = false; - if (m_frame->view() && layer && layer->isPointInResizeControl(m_frame->view()->windowToContents(event.event().pos()))) - inResizer = true; - if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar) - return iBeamCursor(); - return pointerCursor(); - } - case CURSOR_CROSS: - return crossCursor(); - case CURSOR_POINTER: - return handCursor(); - case CURSOR_MOVE: - return moveCursor(); - case CURSOR_ALL_SCROLL: - return moveCursor(); - case CURSOR_E_RESIZE: - return eastResizeCursor(); - case CURSOR_W_RESIZE: - return westResizeCursor(); - case CURSOR_N_RESIZE: - return northResizeCursor(); - case CURSOR_S_RESIZE: - return southResizeCursor(); - case CURSOR_NE_RESIZE: - return northEastResizeCursor(); - case CURSOR_SW_RESIZE: - return southWestResizeCursor(); - case CURSOR_NW_RESIZE: - return northWestResizeCursor(); - case CURSOR_SE_RESIZE: - return southEastResizeCursor(); - case CURSOR_NS_RESIZE: - return northSouthResizeCursor(); - case CURSOR_EW_RESIZE: - return eastWestResizeCursor(); - case CURSOR_NESW_RESIZE: - return northEastSouthWestResizeCursor(); - case CURSOR_NWSE_RESIZE: - return northWestSouthEastResizeCursor(); - case CURSOR_COL_RESIZE: - return columnResizeCursor(); - case CURSOR_ROW_RESIZE: - return rowResizeCursor(); - case CURSOR_TEXT: - return iBeamCursor(); - case CURSOR_WAIT: - return waitCursor(); - case CURSOR_HELP: - return helpCursor(); - case CURSOR_VERTICAL_TEXT: - return verticalTextCursor(); - case CURSOR_CELL: - return cellCursor(); - case CURSOR_CONTEXT_MENU: - return contextMenuCursor(); - case CURSOR_PROGRESS: - return progressCursor(); - case CURSOR_NO_DROP: - return noDropCursor(); - case CURSOR_ALIAS: - return aliasCursor(); - case CURSOR_COPY: - return copyCursor(); - case CURSOR_NONE: - return noneCursor(); - case CURSOR_NOT_ALLOWED: - return notAllowedCursor(); - case CURSOR_DEFAULT: - return pointerCursor(); - case CURSOR_WEBKIT_ZOOM_IN: - return zoomInCursor(); - case CURSOR_WEBKIT_ZOOM_OUT: - return zoomOutCursor(); - } - return pointerCursor(); -} - -bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent) -{ - if (!m_frame->document()) - return false; - - RefPtr<FrameView> protector(m_frame->view()); - - m_mousePressed = true; - m_currentMousePosition = mouseEvent.pos(); - m_mouseDownTimestamp = mouseEvent.timestamp(); - m_mouseDownMayStartDrag = false; - m_mouseDownMayStartSelect = false; - m_mouseDownMayStartAutoscroll = false; - m_mouseDownPos = m_frame->view()->windowToContents(mouseEvent.pos()); - m_mouseDownWasInSubframe = false; - - MouseEventWithHitTestResults mev = prepareMouseEvent(HitTestRequest(false, true), mouseEvent); - - if (!mev.targetNode()) { - invalidateClick(); - return false; - } - - m_mousePressNode = mev.targetNode(); - - Frame* subframe = subframeForTargetNode(mev.targetNode()); - 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. - if (m_mousePressed) - m_capturingMouseEventsNode = mev.targetNode(); - invalidateClick(); - return true; - } - -#if PLATFORM(WIN) - if (m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) { - stopAutoscrollTimer(); - invalidateClick(); - return true; - } - - if (mouseEvent.button() == MiddleButton && !mev.isOverLink()) { - RenderObject* renderer = mev.targetNode()->renderer(); - - while (renderer && !renderer->canBeProgramaticallyScrolled(false)) { - if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement()) - renderer = renderer->document()->ownerElement()->renderer(); - else - renderer = renderer->parent(); - } - - if (renderer) { - m_panScrollInProgress = true; - handleAutoscroll(renderer); - invalidateClick(); - return true; - } - } -#endif - - m_clickCount = mouseEvent.clickCount(); - m_clickNode = mev.targetNode(); - - RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0; - IntPoint p = m_frame->view()->windowToContents(mouseEvent.pos()); - if (layer && layer->isPointInResizeControl(p)) { - layer->setInResizeMode(true); - m_resizeLayer = layer; - m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p); - invalidateClick(); - return true; - } - - bool swallowEvent = dispatchMouseEvent(mousedownEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true); - - // 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(); - mev = prepareMouseEvent(HitTestRequest(true, true), mouseEvent); - - if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get()) - m_lastScrollbarUnderMouse = 0; - } - - if (swallowEvent) { - // scrollbars should get events anyway, even disabled controls might be scrollable - PlatformScrollbar* scrollbar = mev.scrollbar(); - if (!scrollbar) - scrollbar = m_frame->view()->scrollbarUnderMouse(mouseEvent); - if (scrollbar) - passMousePressEventToScrollbar(mev, scrollbar); - } else { - // Refetch the event target node if it currently is the shadow node inside an <input> element. - // If a mouse event handler changes the input element type to one that has a widget associated, - // we'd like to EventHandler::handleMousePressEvent to pass the event to the widget and thus the - // event target node can't still be the shadow node. - if (mev.targetNode()->isShadowNode() && mev.targetNode()->shadowParentNode()->hasTagName(inputTag)) - mev = prepareMouseEvent(HitTestRequest(true, true), mouseEvent); - - PlatformScrollbar* scrollbar = m_frame->view()->scrollbarUnderMouse(mouseEvent); - if (!scrollbar) - scrollbar = mev.scrollbar(); - 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) -{ - if (!m_frame->document()) - return false; - - RefPtr<FrameView> protector(m_frame->view()); - - // We get this instead of a second mouse-up - m_mousePressed = false; - m_currentMousePosition = mouseEvent.pos(); - - MouseEventWithHitTestResults mev = prepareMouseEvent(HitTestRequest(false, true), mouseEvent); - Frame* subframe = subframeForTargetNode(mev.targetNode()); - if (subframe && passMousePressEventToSubframe(mev, subframe)) { - m_capturingMouseEventsNode = 0; - return true; - } - - m_clickCount = mouseEvent.clickCount(); - bool swallowMouseUpEvent = dispatchMouseEvent(mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false); - - bool swallowClickEvent = false; - // Don't ever dispatch click events for right clicks - if (mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode) - swallowClickEvent = dispatchMouseEvent(clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true); - - bool swallowMouseReleaseEvent = false; - if (!swallowMouseUpEvent) - swallowMouseReleaseEvent = handleMouseReleaseEvent(mev); - - invalidateClick(); - - return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent; -} - -bool EventHandler::mouseMoved(const PlatformMouseEvent& event) -{ - HitTestResult hoveredNode = HitTestResult(IntPoint()); - bool result = handleMouseMoveEvent(event, &hoveredNode); - - Page* page = m_frame->page(); - if (!page) - return result; - - hoveredNode.setToNonShadowAncestor(); - page->chrome()->mouseDidMoveOverElement(hoveredNode, event.modifierFlags()); - page->chrome()->setToolTip(hoveredNode); - return result; -} - -bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode) -{ - // in Radar 3703768 we saw frequent crashes apparently due to the - // part being null here, which seems impossible, so check for nil - // but also assert so that we can try to figure this out in debug - // builds, if it happens. - ASSERT(m_frame); - if (!m_frame || !m_frame->document()) - return false; - - RefPtr<FrameView> protector(m_frame->view()); - m_currentMousePosition = mouseEvent.pos(); - - if (m_hoverTimer.isActive()) - m_hoverTimer.stop(); - -#if ENABLE(SVG) - if (m_svgPan) { - static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition); - return true; - } -#endif - - if (m_frameSetBeingResized) - return dispatchMouseEvent(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->handleMouseMoveEvent(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 request(m_mousePressed && m_mouseDownMayStartSelect, m_mousePressed, true); - MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent); - if (hoveredNode) - *hoveredNode = mev.hitTestResult(); - - PlatformScrollbar* scrollbar = 0; - - if (m_resizeLayer && m_resizeLayer->inResizeMode()) - m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner); - else { - if (m_frame->view()) - scrollbar = m_frame->view()->scrollbarUnderMouse(mouseEvent); - - if (!scrollbar) - scrollbar = mev.scrollbar(); - - if (m_lastScrollbarUnderMouse != scrollbar) { - // Send mouse exited to the old scrollbar. - if (m_lastScrollbarUnderMouse) - m_lastScrollbarUnderMouse->handleMouseOutEvent(mouseEvent); - m_lastScrollbarUnderMouse = m_mousePressed ? 0 : scrollbar; - } - } - - bool swallowEvent = false; - Node* targetNode = m_capturingMouseEventsNode ? m_capturingMouseEventsNode.get() : mev.targetNode(); - RefPtr<Frame> newSubframe = subframeForTargetNode(targetNode); - - // We want mouseouts to happen first, from the inside out. First send a move event to the last subframe so that it will fire mouseouts. - if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe) - passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get()); - - if (newSubframe) { - // Update over/out state before passing the event to the subframe. - updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true); - - // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target - // node to be detached from its FrameView, in which case the event should not be passed. - - // Manually merge changes from webkit trunk to fix the crash for - // http://www.coolpc.com.tw/evaluate.php - // See http://trac.webkit.org/changeset/31788. - if (newSubframe->view()) - swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode); - } else { - if (scrollbar && !m_mousePressed) - scrollbar->handleMouseMoveEvent(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering. - if ((!m_resizeLayer || !m_resizeLayer->inResizeMode()) && !m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() && m_frame->view()) - m_frame->view()->setCursor(selectCursor(mev, scrollbar)); - } - - m_lastMouseMoveEventSubframe = newSubframe; - - if (swallowEvent) - return true; - - swallowEvent = dispatchMouseEvent(mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true); - if (!swallowEvent) - swallowEvent = handleMouseDraggedEvent(mev); - - return swallowEvent; -} - -void EventHandler::invalidateClick() -{ - m_clickCount = 0; - m_clickNode = 0; -} - -bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent) -{ - if (!m_frame->document()) - return false; - - RefPtr<FrameView> protector(m_frame->view()); - - m_mousePressed = false; - m_currentMousePosition = mouseEvent.pos(); - -#if ENABLE(SVG) - if (m_svgPan) { - m_svgPan = false; - static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition); - return true; - } -#endif - - if (m_frameSetBeingResized) - return dispatchMouseEvent(mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false); - - if (m_lastScrollbarUnderMouse) { - invalidateClick(); - return m_lastScrollbarUnderMouse->handleMouseReleaseEvent(mouseEvent); - } - - MouseEventWithHitTestResults mev = prepareMouseEvent(HitTestRequest(false, false, false, true), mouseEvent); - Node* targetNode = m_capturingMouseEventsNode.get() ? m_capturingMouseEventsNode.get() : mev.targetNode(); - Frame* subframe = subframeForTargetNode(targetNode); - if (subframe && passMouseReleaseEventToSubframe(mev, subframe)) { - m_capturingMouseEventsNode = 0; - return true; - } - - bool swallowMouseUpEvent = dispatchMouseEvent(mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false); - - // Don't ever dispatch click events for right clicks - bool swallowClickEvent = false; - if (m_clickCount > 0 && mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode) - swallowClickEvent = dispatchMouseEvent(clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true); - - if (m_resizeLayer) { - m_resizeLayer->setInResizeMode(false); - m_resizeLayer = 0; - } - - bool swallowMouseReleaseEvent = false; - if (!swallowMouseUpEvent) - swallowMouseReleaseEvent = handleMouseReleaseEvent(mev); - - invalidateClick(); - - return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent; -} - -bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard) -{ - IntPoint contentsPos = m_frame->view()->windowToContents(event.pos()); - - RefPtr<MouseEvent> me = MouseEvent::create(eventType, - true, true, m_frame->document()->defaultView(), - 0, event.globalX(), event.globalY(), contentsPos.x(), contentsPos.y(), - event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(), - 0, 0, clipboard); - - ExceptionCode ec = 0; - EventTargetNodeCast(dragTarget)->dispatchEvent(me.get(), ec, true); - return me->defaultPrevented(); -} - -bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) -{ - bool accept = false; - - if (!m_frame->document()) - return false; - - if (!m_frame->view()) - return false; - - MouseEventWithHitTestResults mev = prepareMouseEvent(HitTestRequest(true, false), event); - - // Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch) - Node* newTarget = mev.targetNode(); - if (newTarget && newTarget->isTextNode()) - newTarget = newTarget->parentNode(); - if (newTarget) - newTarget = newTarget->shadowAncestorNode(); - - if (m_dragTarget != newTarget) { - // FIXME: this ordering was explicitly chosen to match WinIE. However, - // it is sometimes incorrect when dragging within subframes, as seen with - // LayoutTests/fast/events/drag-in-frames.html. - if (newTarget) - if (newTarget->hasTagName(frameTag) || newTarget->hasTagName(iframeTag)) - accept = static_cast<HTMLFrameElementBase*>(newTarget)->contentFrame()->eventHandler()->updateDragAndDrop(event, clipboard); - else - accept = dispatchDragEvent(dragenterEvent, newTarget, event, clipboard); - - if (m_dragTarget) { - Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag)) - ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0; - if (frame) - accept = frame->eventHandler()->updateDragAndDrop(event, clipboard); - else - dispatchDragEvent(dragleaveEvent, m_dragTarget.get(), event, clipboard); - } - } else { - if (newTarget) - if (newTarget->hasTagName(frameTag) || newTarget->hasTagName(iframeTag)) - accept = static_cast<HTMLFrameElementBase*>(newTarget)->contentFrame()->eventHandler()->updateDragAndDrop(event, clipboard); - else - accept = dispatchDragEvent(dragoverEvent, newTarget, event, clipboard); - } - m_dragTarget = newTarget; - - return accept; -} - -void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) -{ - if (m_dragTarget) { - Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag)) - ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0; - if (frame) - frame->eventHandler()->cancelDragAndDrop(event, clipboard); - else - dispatchDragEvent(dragleaveEvent, m_dragTarget.get(), event, clipboard); - } - clearDragState(); -} - -bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard) -{ - bool accept = false; - if (m_dragTarget) { - Frame* frame = (m_dragTarget->hasTagName(frameTag) || m_dragTarget->hasTagName(iframeTag)) - ? static_cast<HTMLFrameElementBase*>(m_dragTarget.get())->contentFrame() : 0; - if (frame) - accept = frame->eventHandler()->performDragAndDrop(event, clipboard); - else - accept = dispatchDragEvent(dropEvent, m_dragTarget.get(), event, clipboard); - } - clearDragState(); - return accept; -} - -void EventHandler::clearDragState() -{ - m_dragTarget = 0; - m_capturingMouseEventsNode = 0; -#if PLATFORM(MAC) - m_sendingEventToSubview = false; -#endif -} - -Node* EventHandler::nodeUnderMouse() const -{ - return m_nodeUnderMouse.get(); -} - -void EventHandler::setCapturingMouseEventsNode(PassRefPtr<Node> n) -{ - m_capturingMouseEventsNode = n; -} - -MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev) -{ - ASSERT(m_frame); - ASSERT(m_frame->document()); - - IntPoint documentPoint = m_frame->view()->windowToContents(mev.pos()); - return m_frame->document()->prepareMouseEvent(request, documentPoint, mev); -} - -void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut) -{ - Node* result = targetNode; - - // If we're capturing, we always go right to that node. - if (m_capturingMouseEventsNode) - result = m_capturingMouseEventsNode.get(); - else { - // If the target node is a text node, dispatch on the parent node - rdar://4196646 - if (result && result->isTextNode()) - result = result->parentNode(); - if (result) - result = result->shadowAncestorNode(); - } - m_nodeUnderMouse = result; - - // Fire mouseout/mouseover if the mouse has shifted to a different node. - if (fireMouseOverOut) { - if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) { - m_lastNodeUnderMouse = 0; - m_lastScrollbarUnderMouse = 0; - } - - if (m_lastNodeUnderMouse != m_nodeUnderMouse) { - // send mouseout event to the old node - if (m_lastNodeUnderMouse) - EventTargetNodeCast(m_lastNodeUnderMouse.get())->dispatchMouseEvent(mouseEvent, mouseoutEvent, 0, m_nodeUnderMouse.get()); - // send mouseover event to the new node - if (m_nodeUnderMouse) - EventTargetNodeCast(m_nodeUnderMouse.get())->dispatchMouseEvent(mouseEvent, mouseoverEvent, 0, m_lastNodeUnderMouse.get()); - } - m_lastNodeUnderMouse = m_nodeUnderMouse; - } -} - -bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, bool cancelable, int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder) -{ - updateMouseEventTargetNode(targetNode, mouseEvent, setUnder); - - bool swallowEvent = false; - - if (m_nodeUnderMouse) - swallowEvent = EventTargetNodeCast(m_nodeUnderMouse.get())->dispatchMouseEvent(mouseEvent, eventType, clickCount); - - if (!swallowEvent && eventType == mousedownEvent) { - // Blur current focus node when a link/button is clicked; this - // is expected by some sites that rely on onChange handlers running - // from form fields before the button click is processed. - Node* node = m_nodeUnderMouse.get(); - RenderObject* renderer = node ? node->renderer() : 0; - - // Walk up the render tree to search for a node to focus. - // Walking up the DOM tree wouldn't work for shadow trees, like those behind the engine-based text fields. - while (renderer) { - node = renderer->element(); - if (node && node->isFocusable()) { - // To fix <rdar://problem/4895428> Can't drag selected ToDo, we don't focus a - // node on mouse down if it's selected and inside a focused node. It will be - // focused if the user does a mouseup over it, however, because the mouseup - // will set a selection inside it, which will call setFocuseNodeIfNeeded. - ExceptionCode ec = 0; - Node* n = node->isShadowNode() ? node->shadowParentNode() : node; - if (m_frame->selection()->isRange() && - m_frame->selection()->toRange()->compareNode(n, ec) == Range::NODE_INSIDE && - n->isDescendantOf(m_frame->document()->focusedNode())) - return false; - - break; - } - - renderer = renderer->parent(); - } - // If focus shift is blocked, we eat the event. Note we should never clear swallowEvent - // if the page already set it (e.g., by canceling default behavior). - if (node && node->isMouseFocusable()) { - if (!m_frame->page()->focusController()->setFocusedNode(node, m_frame)) - swallowEvent = true; - } else if (!node || !node->focused()) { - if (!m_frame->page()->focusController()->setFocusedNode(0, m_frame)) - swallowEvent = true; - } - } - - return swallowEvent; -} - -bool EventHandler::handleWheelEvent(PlatformWheelEvent& e) -{ - Document* doc = m_frame->document(); - if (!doc) - return false; - - RenderObject* docRenderer = doc->renderer(); - if (!docRenderer) - return false; - - IntPoint vPoint = m_frame->view()->windowToContents(e.pos()); - - HitTestRequest request(true, false); - HitTestResult result(vPoint); - doc->renderer()->layer()->hitTest(request, result); - Node* node = result.innerNode(); - - if (node) { - // Figure out which view to send the event to. - RenderObject* target = node->renderer(); - - if (target && target->isWidget()) { - Widget* widget = static_cast<RenderWidget*>(target)->widget(); - - if (widget && passWheelEventToWidget(e, widget)) { - e.accept(); - return true; - } - } - - node = node->shadowAncestorNode(); - EventTargetNodeCast(node)->dispatchWheelEvent(e); - if (e.isAccepted()) - return true; - - if (node->renderer()) { - // Just 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). - float deltaX = e.isContinuous() ? e.continuousDeltaX() : e.deltaX(); - float deltaY = e.isContinuous() ? e.continuousDeltaY() : e.deltaY(); - - scrollAndAcceptEvent(deltaX, ScrollLeft, ScrollRight, e.isPageXScrollModeEnabled(), e, node, m_frame->page()->chrome()->windowRect().width()); - scrollAndAcceptEvent(deltaY, ScrollUp, ScrollDown, e.isPageYScrollModeEnabled(), e, node, m_frame->page()->chrome()->windowRect().height()); - } - } - - if (!e.isAccepted()) - m_frame->view()->wheelEvent(e); - - return e.isAccepted(); -} - -bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event) -{ - Document* doc = m_frame->document(); - FrameView* v = m_frame->view(); - if (!doc || !v) - return false; - - bool swallowEvent; - IntPoint viewportPos = v->windowToContents(event.pos()); - MouseEventWithHitTestResults mev = doc->prepareMouseEvent(HitTestRequest(false, true), viewportPos, event); - -#if 0 - // The following commented out code tries to select the word below the - // mouse cursor on right click. This used to be behavior that could be - // changed by webkit embedders, but in change 24499, that functionality was - // removed. - // https://bugs.webkit.org/show_bug.cgi?id=15279 - - if (!m_frame->selection()->contains(viewportPos) && - // FIXME: In the editable case, word selection sometimes selects content that isn't underneath the mouse. - // If the selection is non-editable, we do word selection to make it easier to use the contextual menu items - // available for text selections. But only if we're above text. - (m_frame->selection()->isContentEditable() || mev.targetNode() && mev.targetNode()->isTextNode())) { - m_mouseDownMayStartSelect = true; // context menu events are always allowed to perform a selection - selectClosestWordOrLinkFromMouseEvent(mev); - } -#endif - swallowEvent = dispatchMouseEvent(contextmenuEvent, mev.targetNode(), true, 0, event, true); - - return swallowEvent; -} - -void EventHandler::scheduleHoverStateUpdate() -{ - if (!m_hoverTimer.isActive()) - m_hoverTimer.startOneShot(0); -} - -// Whether or not a mouse down can begin the creation of a selection. Fires the selectStart event. -bool EventHandler::canMouseDownStartSelect(Node* node) -{ - if (!node || !node->renderer()) - return true; - - // Some controls and images can't start a select on a mouse down. - if (!node->canStartSelection()) - return false; - - for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) - if (Node* node = curr->element()) - return EventTargetNodeCast(node)->dispatchHTMLEvent(selectstartEvent, true, true); - - return true; -} - -bool EventHandler::canMouseDragExtendSelect(Node* node) -{ - if (!node || !node->renderer()) - return true; - - for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) - if (Node* node = curr->element()) - return EventTargetNodeCast(node)->dispatchHTMLEvent(selectstartEvent, true, true); - - return true; -} - -void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet) -{ - m_frameSetBeingResized = frameSet; -} - -void EventHandler::resizeLayerDestroyed() -{ - ASSERT(m_resizeLayer); - m_resizeLayer = 0; -} - -void EventHandler::hoverTimerFired(Timer<EventHandler>*) -{ - m_hoverTimer.stop(); - - ASSERT(m_frame); - ASSERT(m_frame->document()); - - if (RenderObject* renderer = m_frame->contentRenderer()) { - HitTestResult result(m_frame->view()->windowToContents(m_currentMousePosition)); - renderer->layer()->hitTest(HitTestRequest(false, false, true), result); - m_frame->document()->updateRendering(); - } -} - -static EventTargetNode* eventTargetNodeForDocument(Document* doc) -{ - if (!doc) - return 0; - Node* node = doc->focusedNode(); - if (!node) { - if (doc->isHTMLDocument()) - node = doc->body(); - else - node = doc->documentElement(); - if (!node) - return 0; - } - return EventTargetNodeCast(node); -} - -bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt) -{ - if ((evt.modifiers() & s_accessKeyModifiers) != s_accessKeyModifiers) - return false; - String key = evt.unmodifiedText(); - Element* elem = m_frame->document()->getElementByAccessKey(key.lower()); - if (!elem) - return false; - elem->accessKeyAction(false); - return true; -} - -#if !PLATFORM(MAC) -bool EventHandler::needsKeyboardEventDisambiguationQuirks() const -{ - return false; -} -#endif - -bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent) -{ -#if PLATFORM(WIN) || (PLATFORM(WX) && PLATFORM(WIN_OS)) - String escKeyId = "U+001B"; - // If a key is pressed while the autoscroll/panScroll is in progress then we want to stop - if (initialKeyEvent.keyIdentifier() == escKeyId && m_frame->page()->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) - stopAutoscrollTimer(); -#endif - - // Check for cases where we are too early for events -- possible unmatched key up - // from pressing return in the location bar. - RefPtr<EventTargetNode> node = eventTargetNodeForDocument(m_frame->document()); - if (!node) - return false; - - // FIXME: what is this doing here, in keyboard event handler? - m_frame->loader()->resetMultipleFormSubmissionProtection(); - - // In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match. - // On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict - // with access keys. Then we dispatch keydown, but suppress its default handling. - // On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages. - // Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events. - bool matchedAnAccessKey = false; - if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown) - matchedAnAccessKey = handleAccessKey(initialKeyEvent); - - // FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch. - if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp || initialKeyEvent.type() == PlatformKeyboardEvent::Char) - return !node->dispatchKeyEvent(initialKeyEvent); - - bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks(); - - ExceptionCode ec; - PlatformKeyboardEvent keyDownEvent = initialKeyEvent; - if (keyDownEvent.type() != PlatformKeyboardEvent::RawKeyDown) - keyDownEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::RawKeyDown, backwardCompatibilityMode); - RefPtr<KeyboardEvent> keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView()); - if (matchedAnAccessKey) - keydown->setDefaultPrevented(true); - keydown->setTarget(node); - - if (initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) { - node->dispatchEvent(keydown, ec, true); - return keydown->defaultHandled() || keydown->defaultPrevented(); - } - - // 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, true); - bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented(); - if (handledByInputMethod || (keydownResult && !backwardCompatibilityMode)) - return keydownResult; - - // Focus may have changed during keydown handling, so refetch node. - // But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original node. - if (!keydownResult) { - node = eventTargetNodeForDocument(m_frame->document()); - if (!node) - return false; - } - - PlatformKeyboardEvent keyPressEvent = initialKeyEvent; - keyPressEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::Char, backwardCompatibilityMode); - if (keyPressEvent.text().isEmpty()) - return keydownResult; - RefPtr<KeyboardEvent> keypress = KeyboardEvent::create(keyPressEvent, m_frame->document()->defaultView()); - keypress->setTarget(node); - if (keydownResult) - keypress->setDefaultPrevented(true); -#if PLATFORM(MAC) - keypress->keypressCommands() = keydown->keypressCommands(); -#endif - node->dispatchEvent(keypress, ec, true); - - return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled(); -} - -void EventHandler::handleKeyboardSelectionMovement(KeyboardEvent* event) -{ - if (!event) - return; - - String key = event->keyIdentifier(); - bool isShifted = event->getModifierState("Shift"); - bool isOptioned = event->getModifierState("Alt"); - - if (key == "Up") { - m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::BACKWARD, LineGranularity, true); - event->setDefaultHandled(); - } - else if (key == "Down") { - m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::FORWARD, LineGranularity, true); - event->setDefaultHandled(); - } - else if (key == "Left") { - m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::LEFT, (isOptioned) ? WordGranularity : CharacterGranularity, true); - event->setDefaultHandled(); - } - else if (key == "Right") { - m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::RIGHT, (isOptioned) ? WordGranularity : CharacterGranularity, true); - event->setDefaultHandled(); - } -} - -void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event) -{ - if (event->type() == keydownEvent) { - m_frame->editor()->handleKeyboardEvent(event); - if (event->defaultHandled()) - return; - if (event->keyIdentifier() == "U+0009") - defaultTabEventHandler(event); - - // provides KB navigation and selection for enhanced accessibility users - if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled()) - handleKeyboardSelectionMovement(event); - } - if (event->type() == keypressEvent) { - m_frame->editor()->handleKeyboardEvent(event); - if (event->defaultHandled()) - return; - } -} - -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 -{ - IntPoint dragLocation = m_frame->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 -{ - ASSERT(node); - if (node->hasChildNodes() || !m_frame->view()) - return false; - return m_frame->page() && m_frame->page()->dragController()->mayStartDragAtEventLocation(m_frame, point); -} - -void EventHandler::dragSourceMovedTo(const PlatformMouseEvent& 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(dragEvent, event); -} - -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(dragendEvent, event); - } - freeClipboard(); - dragState().m_dragSrc = 0; -} - -// 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(true, false); - 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 - m_frame->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) { - int srcX, srcY; - if (RenderObject* renderer = dragState().m_dragSrc->renderer()) { - renderer->absolutePosition(srcX, srcY); - IntSize delta = m_mouseDownPos - IntPoint(srcX, srcY); - dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), IntPoint() + 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(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 - dragState().m_dragClipboard->sourceOperation(srcOp); - - // Yuck, dragSourceMovedTo() can be called 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) { - DragController* dragController = m_frame->page() ? m_frame->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(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; -} - -bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, - bool isLineBreak, bool isBackTab) -{ - if (!m_frame) - return false; -#ifndef NDEBUG - // Platforms should differentiate real commands like selectAll from text input in disguise (like insertNewline), - // and avoid dispatching text input events from keydown default handlers. - if (underlyingEvent && underlyingEvent->isKeyboardEvent()) - ASSERT(static_cast<KeyboardEvent*>(underlyingEvent)->type() == keypressEvent); -#endif - EventTarget* target; - if (underlyingEvent) - target = underlyingEvent->target(); - else - target = eventTargetNodeForDocument(m_frame->document()); - if (!target) - return false; - RefPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text); - event->setUnderlyingEvent(underlyingEvent); - event->setIsLineBreak(isLineBreak); - event->setIsBackTab(isBackTab); - ExceptionCode ec; - return target->dispatchEvent(event.release(), ec, true); -} - - -#if !PLATFORM(MAC) && !PLATFORM(QT) -bool EventHandler::invertSenseOfTabsToLinks(KeyboardEvent*) const -{ - return false; -} -#endif - -bool EventHandler::tabsToLinks(KeyboardEvent* event) const -{ - Page* page = m_frame->page(); - if (!page) - return false; - - if (page->chrome()->client()->tabsToLinks()) - return !invertSenseOfTabsToLinks(event); - - return invertSenseOfTabsToLinks(event); -} - -void EventHandler::defaultTextInputEventHandler(TextEvent* event) -{ - String data = event->data(); - if (data == "\n") { - if (event->isLineBreak()) { - if (m_frame->editor()->insertLineBreak()) - event->setDefaultHandled(); - } else { - if (m_frame->editor()->insertParagraphSeparator()) - event->setDefaultHandled(); - } - } else { - if (m_frame->editor()->insertTextWithoutSendingTextEvent(data, false, event)) - event->setDefaultHandled(); - } -} - -void EventHandler::defaultTabEventHandler(KeyboardEvent* event) -{ - // We should only advance focus on tabs if no special modifier keys are held down. - if (event->ctrlKey() || event->metaKey() || event->altGraphKey()) - return; - - Page* page = m_frame->page(); - if (!page) - return; - if (!page->tabKeyCyclesThroughElements()) - return; - - FocusDirection focusDirection = event->shiftKey() ? FocusDirectionBackward : FocusDirectionForward; - - // Tabs can be used in design mode editing. - if (m_frame->document()->inDesignMode()) - return; - - if (page->focusController()->advanceFocus(focusDirection, event)) - event->setDefaultHandled(); -} - -void EventHandler::capsLockStateMayHaveChanged() -{ - if (Document* d = m_frame->document()) - if (Node* node = d->focusedNode()) - if (RenderObject* r = node->renderer()) - r->capsLockStateMayHaveChanged(); -} - -unsigned EventHandler::pendingFrameUnloadEventCount() -{ - return m_pendingFrameUnloadEventCount; -} - -void EventHandler::addPendingFrameUnloadEventCount() -{ - m_pendingFrameUnloadEventCount += 1; - m_frame->page()->changePendingUnloadEventCount(1); - return; -} - -void EventHandler::removePendingFrameUnloadEventCount() -{ - ASSERT( (-1 + (int)m_pendingFrameUnloadEventCount) >= 0 ); - m_pendingFrameUnloadEventCount -= 1; - m_frame->page()->changePendingUnloadEventCount(-1); - return; -} - -void EventHandler::clearPendingFrameUnloadEventCount() -{ - m_frame->page()->changePendingUnloadEventCount(-((int)m_pendingFrameUnloadEventCount)); - m_pendingFrameUnloadEventCount = 0; - return; -} - -unsigned EventHandler::pendingFrameBeforeUnloadEventCount() -{ - return m_pendingFrameBeforeUnloadEventCount; -} - -void EventHandler::addPendingFrameBeforeUnloadEventCount() -{ - m_pendingFrameBeforeUnloadEventCount += 1; - m_frame->page()->changePendingBeforeUnloadEventCount(1); - return; -} - -void EventHandler::removePendingFrameBeforeUnloadEventCount() -{ - ASSERT( (-1 + (int)m_pendingFrameBeforeUnloadEventCount) >= 0 ); - m_pendingFrameBeforeUnloadEventCount -= 1; - m_frame->page()->changePendingBeforeUnloadEventCount(-1); - return; -} - - void EventHandler::clearPendingFrameBeforeUnloadEventCount() -{ - m_frame->page()->changePendingBeforeUnloadEventCount(-((int)m_pendingFrameBeforeUnloadEventCount)); - m_pendingFrameBeforeUnloadEventCount = 0; - return; -} -} |