#include "config.h"
#include "EventHandler.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 "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 "RenderWidget.h"
#include "SelectionController.h"
#include "Settings.h"
#include "TextEvent.h"
#if ENABLE(TOUCH_EVENTS)
#include "Touch.h"
#endif
#if ENABLE(SVG)
#include "SVGCursorElement.h"
#include "SVGDocument.h"
#include "SVGLength.h"
#include "SVGNames.h"
#endif
namespace WebCore {
using namespace EventNames;
using namespace HTMLNames;
const int LinkDragHysteresis = 40;
const int ImageDragHysteresis = 5;
const int TextDragHysteresis = 3;
const int GeneralDragHysteresis = 3;
const double TextDragDelay = 0.15;
#if ENABLE(TOUCH_EVENTS)
const float GestureUnknown = 0.0;
#endif
const int CompositionEventKeyCode = 229;
#if ENABLE(SVG)
using namespace SVGNames;
#endif
const double autoscrollInterval = 0.1;
static Frame* subframeForTargetNode(Node* node);
EventHandler::EventHandler(Frame* frame)
: m_frame(frame)
, m_mousePressed(false)
, m_mouseDownMayStartSelect(false)
, m_mouseDownMayStartDrag(false)
, m_mouseDownWasSingleClickInSelection(false)
, m_beganSelectingText(false)
, m_hoverTimer(this, &EventHandler::hoverTimerFired)
, m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired)
, m_autoscrollRenderer(0)
, m_mouseDownMayStartAutoscroll(false)
, m_mouseDownWasInSubframe(false)
#if ENABLE(SVG)
, m_svgPan(false)
#endif
, m_resizeLayer(0)
, m_capturingMouseEventsNode(0)
, m_clickCount(0)
#if ENABLE(TOUCH_EVENTS)
, m_gestureInitialDiameter(GestureUnknown)
, m_gestureLastDiameter(GestureUnknown)
, m_gestureInitialRotation(GestureUnknown)
, m_gestureLastRotation(GestureUnknown)
#endif
, m_mouseDownTimestamp(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;
#if ENABLE(TOUCH_EVENTS)
m_gestureInitialDiameter = GestureUnknown;
m_gestureLastDiameter = GestureUnknown;
m_gestureInitialRotation = GestureUnknown;
m_gestureLastRotation = GestureUnknown;
m_touchesByID.clear();
m_gestureTargets.clear();
#endif
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->selectionController()->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->selectionController()->setSelection(newSelection);
}
}
bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)
{
if (event.event().button() != LeftButton)
return false;
if (m_frame->selectionController()->isRange())
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->selectionController()->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;
bool extendSelection = event.event().shiftKey() && !event.isOverLink();
IntPoint vPoint = m_frame->view()->windowToContents(event.event().pos());
if (!extendSelection && m_frame->selectionController()->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->selectionController()->selection();
if (extendSelection && newSelection.isCaretOrRange()) {
m_frame->selectionController()->setLastChangeWasHorizontalExtension(false);
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->selectionController()->setSelection(newSelection);
return true;
}
bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)
{
dragState().m_dragSrc = 0;
bool singleClick = event.event().clickCount() <= 1;
m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode());
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
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->selectionController()->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()->shouldAutoscroll());
return swallowEvent;
}
bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event)
{
return false;
}
void EventHandler::updateSelectionForMouseDrag()
{
FrameView* view = m_frame->view();
if (!view)
return;
RenderObject* renderer = m_frame->renderer();
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));
if (targetPosition.isNull())
return;
Selection newSelection = m_frame->selectionController()->selection();
#if ENABLE(SVG)
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->selectionController()->setLastChangeWasHorizontalExtension(false);
m_frame->selectionController()->setSelection(newSelection);
}
}
bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event)
{
if (eventLoopHandleMouseUp(event))
return true;
return eventActivatedView(event.event());
}
bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event)
{
stopAutoscrollTimer();
if (handleMouseUp(event))
return true;
m_frame->selectionController()->setCaretBlinkingSuspended(false);
m_mousePressed = false;
m_mouseDownMayStartDrag = false;
m_mouseDownMayStartSelect = false;
m_mouseDownMayStartAutoscroll = false;
m_mouseDownWasInSubframe = false;
bool handled = false;
if (m_mouseDownWasSingleClickInSelection && !m_beganSelectingText
&& m_dragStartPos == event.event().pos()
&& m_frame->selectionController()->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->selectionController()->setSelection(newSelection);
handled = true;
}
m_frame->notifyRendererOfSelectionChange(true);
m_frame->selectionController()->selectFrameElementInParentIfFullySelected();
return handled;
}
void EventHandler::handleAutoscroll(RenderObject* renderer)
{
if (m_autoscrollTimer.isActive())
return;
setAutoscrollRenderer(renderer);
startAutoscrollTimer();
}
void EventHandler::autoscrollTimerFired(Timer<EventHandler>*)
{
if (!m_mousePressed) {
stopAutoscrollTimer();
return;
}
if (RenderObject* r = autoscrollRenderer())
r->autoscroll();
}
RenderObject* EventHandler::autoscrollRenderer() const
{
return m_autoscrollRenderer;
}
void EventHandler::setAutoscrollRenderer(RenderObject* renderer)
{
m_autoscrollRenderer = renderer;
}
void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const
{
flagDHTML = false;
flagUA = false;
}
HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent)
{
HitTestResult result(point);
if (!m_frame->renderer())
return result;
m_frame->renderer()->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->renderer())
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->renderer()->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_mouseDownWasInSubframe) {
if (Frame* subframe = subframeForTargetNode(m_mousePressNode.get()))
subframe->eventHandler()->stopAutoscrollTimer(rendererIsBeingDestroyed);
return;
}
if (!rendererIsBeingDestroyed && autoscrollRenderer())
autoscrollRenderer()->stopAutoscroll();
setAutoscrollRenderer(0);
m_autoscrollTimer.stop();
}
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();
}
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)) {
if (m_mousePressed)
m_capturingMouseEventsNode = mev.targetNode();
invalidateClick();
return true;
}
m_clickCount = mouseEvent.clickCount();
m_clickNode = mev.targetNode();
if (!m_clickNode) {
invalidateClick();
return false;
}
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 (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) {
if (mev.scrollbar())
passMousePressEventToScrollbar(mev, mev.scrollbar());
} else {
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);
}
passEventToScrollView();
return swallowEvent;
}
bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent)
{
if (!m_frame->document())
return false;
RefPtr<FrameView> protector(m_frame->view());
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;
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)
{
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);
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) {
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);
if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)
passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get());
if (newSubframe) {
updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true);
swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);
}
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;
}
m_capturingMouseEventsNode = 0;
bool swallowMouseUpEvent = dispatchMouseEvent(mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
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();
passEventToScrollView();
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 = new MouseEvent(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);
Node* newTarget = mev.targetNode();
if (newTarget && newTarget->isTextNode())
newTarget = newTarget->parentNode();
if (newTarget)
newTarget = newTarget->shadowAncestorNode();
if (m_dragTarget != newTarget) {
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 (m_capturingMouseEventsNode)
result = m_capturingMouseEventsNode.get();
else {
if (result && result->isTextNode())
result = result->parentNode();
if (result)
result = result->shadowAncestorNode();
}
m_nodeUnderMouse = result;
if (fireMouseOverOut) {
if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) {
m_lastNodeUnderMouse = 0;
m_lastScrollbarUnderMouse = 0;
}
if (m_lastNodeUnderMouse != m_nodeUnderMouse) {
if (m_lastNodeUnderMouse)
EventTargetNodeCast(m_lastNodeUnderMouse.get())->dispatchMouseEvent(mouseEvent, mouseoutEvent, 0, m_nodeUnderMouse.get());
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)
{
m_frame->view()->resetDeferredRepaintDelay();
updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);
bool swallowEvent = false;
if (m_nodeUnderMouse)
swallowEvent = EventTargetNodeCast(m_nodeUnderMouse.get())->dispatchMouseEvent(mouseEvent, eventType, clickCount);
if (!swallowEvent && eventType == mousedownEvent) {
Node* node = m_nodeUnderMouse.get();
RenderObject* renderer = node ? node->renderer() : 0;
while (renderer) {
node = renderer->element();
if (node && node->isFocusable()) {
ExceptionCode ec = 0;
Node* n = node->isShadowNode() ? node->shadowParentNode() : node;
if (m_frame->selectionController()->isRange() &&
m_frame->selectionController()->toRange()->compareNode(n, ec) == Range::NODE_INSIDE &&
n->isDescendantOf(m_frame->document()->focusedNode()))
return false;
break;
}
renderer = renderer->parent();
}
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) {
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()) {
float deltaX = e.isContinuous() ? e.continuousDeltaX() : e.deltaX();
float deltaY = e.isContinuous() ? e.continuousDeltaY() : e.deltaY();
if (deltaX && node->renderer()->scroll(deltaX < 0 ? ScrollRight : ScrollLeft, e.isContinuous() ? ScrollByPixel : ScrollByLine,
deltaX < 0 ? -deltaX : deltaX))
e.accept();
if (deltaY && node->renderer()->scroll(deltaY < 0 ? ScrollDown : ScrollUp, e.isContinuous() ? ScrollByPixel : ScrollByLine,
deltaY < 0 ? -deltaY : deltaY))
e.accept();
}
}
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 (!m_frame->selectionController()->contains(viewportPos) &&
(m_frame->selectionController()->isContentEditable() || mev.targetNode() && mev.targetNode()->isTextNode())) {
m_mouseDownMayStartSelect = true; selectClosestWordOrLinkFromMouseEvent(mev);
}
swallowEvent = dispatchMouseEvent(contextmenuEvent, mev.targetNode(), true, 0, event, true);
return swallowEvent;
}
void EventHandler::scheduleHoverStateUpdate()
{
if (!m_hoverTimer.isActive())
m_hoverTimer.startOneShot(0);
}
bool EventHandler::canMouseDownStartSelect(Node* node)
{
if (!node || !node->renderer())
return true;
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->renderer()) {
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 PLATFORM(MAC) || PLATFORM(QT)
if (evt.ctrlKey())
#else
if (evt.altKey())
#endif
{
String key = evt.unmodifiedText();
Element* elem = m_frame->document()->getElementByAccessKey(key.lower());
if (elem) {
elem->accessKeyAction(false);
return true;
}
}
return false;
}
bool EventHandler::needsKeyboardEventDisambiguationQuirks() const
{
return false;
}
bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)
{
RefPtr<EventTargetNode> node = eventTargetNodeForDocument(m_frame->document());
if (!node)
return false;
m_frame->view()->resetDeferredRepaintDelay();
m_frame->loader()->resetMultipleFormSubmissionProtection();
bool matchedAnAccessKey = false;
if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown)
matchedAnAccessKey = handleAccessKey(initialKeyEvent);
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 = new KeyboardEvent(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();
}
m_frame->editor()->handleInputMethodKeydown(keydown.get());
bool handledByInputMethod = keydown->defaultHandled();
if (handledByInputMethod) {
keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode);
keydown = new KeyboardEvent(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;
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 = new KeyboardEvent(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::defaultKeyboardEventHandler(KeyboardEvent* event)
{
if (event->type() == keydownEvent) {
m_frame->editor()->handleKeyboardEvent(event);
if (event->defaultHandled())
return;
if (event->keyIdentifier() == "U+0009")
defaultTabEventHandler(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;
}
bool EventHandler::shouldDragAutoNode(Node* node, const IntPoint& point) const
{
return false;
}
bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent,
bool isLineBreak, bool isBackTab)
{
if (!m_frame)
return false;
m_frame->view()->resetDeferredRepaintDelay();
#ifndef NDEBUG
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 = new TextEvent(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)
{
if (event->ctrlKey() || event->metaKey() || event->altGraphKey())
return;
Page* page = m_frame->page();
if (!page)
return;
if (!page->tabKeyCyclesThroughElements())
return;
FocusDirection focusDirection = event->shiftKey() ? FocusDirectionBackward : FocusDirectionForward;
if (m_frame->document()->inDesignMode())
return;
if (page->focusController()->advanceFocus(focusDirection, event))
event->setDefaultHandled();
}
void EventHandler::capsLockStateMayHaveChanged()
{
if (Document* d = m_frame->document())
if (Node* node = d->focusedNode())
if (RenderObject* r = node->renderer())
r->capsLockStateMayHaveChanged();
}
}