#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 "HTMLFrameElementBase.h"
#include "HTMLFrameSetElement.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HitTestRequest.h"
#include "HitTestResult.h"
#include "Image.h"
#include "InspectorController.h"
#include "KeyboardEvent.h"
#include "MouseEvent.h"
#include "MouseEventWithHitTestResults.h"
#include "Page.h"
#include "PlatformKeyboardEvent.h"
#include "PlatformWheelEvent.h"
#include "RenderFrameSet.h"
#include "RenderTextControlSingleLine.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "Scrollbar.h"
#include "SelectionController.h"
#include "Settings.h"
#include "TextEvent.h"
#include "htmlediting.h" // for comparePositions()
#include <wtf/StdLibExtras.h>
#include <wtf/UnusedParam.h>
#if ENABLE(SVG)
#include "SVGDocument.h"
#include "SVGElementInstance.h"
#include "SVGNames.h"
#include "SVGUseElement.h"
#endif
#include "Touch.h"
namespace WebCore {
using namespace HTMLNames;
#if ENABLE(DRAG_SUPPORT)
const int LinkDragHysteresis = 40;
const int ImageDragHysteresis = 5;
const int TextDragHysteresis = 3;
const int GeneralDragHysteresis = 3;
#endif // ENABLE(DRAG_SUPPORT)
const float GestureUnknown = 0.0f;
const int CompositionEventKeyCode = 229;
#if ENABLE(SVG)
using namespace SVGNames;
#endif
const double autoscrollInterval = 0.05;
static Frame* subframeForTargetNode(Node*);
static Frame* subframeForHitTestResult(const MouseEventWithHitTestResults&);
static inline void scrollAndAcceptEvent(float delta, ScrollDirection positiveDirection, ScrollDirection negativeDirection, PlatformWheelEvent& e, Node* node, Node** stopNode)
{
if (!delta)
return;
RenderBox* enclosingBox = node->renderer()->enclosingBox();
if (e.granularity() == ScrollByPageWheelEvent) {
if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPage, 1, stopNode))
e.accept();
return;
}
float pixelsToScroll = delta > 0 ? delta : -delta;
if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, pixelsToScroll, stopNode))
e.accept();
}
#if !PLATFORM(MAC)
inline bool EventHandler::eventLoopHandleMouseUp(const MouseEventWithHitTestResults&)
{
return false;
}
inline bool EventHandler::eventLoopHandleMouseDragged(const MouseEventWithHitTestResults&)
{
return false;
}
#endif
EventHandler::EventHandler(Frame* frame)
: m_frame(frame)
, m_mousePressed(false)
, m_capturesDragging(false)
, m_mouseDownMayStartSelect(false)
#if ENABLE(DRAG_SUPPORT)
, m_mouseDownMayStartDrag(false)
#endif
, m_mouseDownWasSingleClickInSelection(false)
, m_beganSelectingText(false)
, m_panScrollInProgress(false)
, m_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_gestureInitialDiameter(GestureUnknown)
, m_gestureLastDiameter(GestureUnknown)
, m_gestureInitialRotation(GestureUnknown)
, m_gestureLastRotation(GestureUnknown)
, m_mouseDownTimestamp(0)
, m_useLatchedWheelEventNode(false)
, m_widgetIsLatched(false)
#if PLATFORM(MAC)
, m_mouseDownView(nil)
, m_sendingEventToSubview(false)
#endif
{
}
EventHandler::~EventHandler()
{
}
#if ENABLE(DRAG_SUPPORT)
EventHandler::EventHandlerDragState& EventHandler::dragState()
{
DEFINE_STATIC_LOCAL(EventHandlerDragState, state, ());
return state;
}
#endif // ENABLE(DRAG_SUPPORT)
void EventHandler::clear()
{
m_hoverTimer.stop();
m_resizeLayer = 0;
m_nodeUnderMouse = 0;
m_lastNodeUnderMouse = 0;
#if ENABLE(SVG)
m_instanceUnderMouse = 0;
m_lastInstanceUnderMouse = 0;
#endif
m_lastMouseMoveEventSubframe = 0;
m_lastScrollbarUnderMouse = 0;
m_clickCount = 0;
m_clickNode = 0;
m_gestureInitialDiameter = GestureUnknown;
m_gestureLastDiameter = GestureUnknown;
m_gestureInitialRotation = GestureUnknown;
m_gestureLastRotation = GestureUnknown;
m_touchesByID.clear();
m_gestureTargets.clear();
m_frameSetBeingResized = 0;
#if ENABLE(DRAG_SUPPORT)
m_dragTarget = 0;
#endif
m_currentMousePosition = IntPoint();
m_mousePressNode = 0;
m_mousePressed = false;
m_capturesDragging = false;
m_capturingMouseEventsNode = 0;
m_latchedWheelEventNode = 0;
m_previousWheelScrolledNode = 0;
}
void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)
{
Node* innerNode = result.targetNode();
VisibleSelection newSelection;
if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
if (pos.isNotNull()) {
newSelection = VisibleSelection(pos);
newSelection.expandUsingGranularity(WordGranularity);
}
if (newSelection.isRange()) {
m_frame->setSelectionGranularity(WordGranularity);
m_beganSelectingText = true;
if (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled())
newSelection.appendTrailingWhitespace();
}
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) {
VisibleSelection newSelection;
Element* URLElement = result.hitTestResult().URLElement();
VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
if (pos.isNotNull() && pos.deepEquivalent().node()->isDescendantOf(URLElement))
newSelection = VisibleSelection::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())
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;
VisibleSelection newSelection;
VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint()));
if (pos.isNotNull()) {
newSelection = VisibleSelection(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)
{
Node* innerNode = event.targetNode();
if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
return false;
bool extendSelection = event.event().shiftKey() && !event.isOverLink();
if (FrameView* view = m_frame->view()) {
IntPoint vPoint = view->windowToContents(event.event().pos());
if (!extendSelection && m_frame->selection()->contains(vPoint)) {
m_mouseDownWasSingleClickInSelection = true;
return false;
}
}
VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint()));
if (visiblePos.isNull())
visiblePos = VisiblePosition(innerNode, 0, DOWNSTREAM);
Position pos = visiblePos.deepEquivalent();
VisibleSelection newSelection = m_frame->selection()->selection();
if (extendSelection && newSelection.isCaretOrRange()) {
m_frame->selection()->setLastChangeWasHorizontalExtension(false);
Position start = newSelection.start();
Position end = newSelection.end();
if (comparePositions(pos, start) <= 0)
newSelection = VisibleSelection(pos, end);
else
newSelection = VisibleSelection(start, pos);
if (m_frame->selectionGranularity() != CharacterGranularity)
newSelection.expandUsingGranularity(m_frame->selectionGranularity());
m_beganSelectingText = true;
} else {
newSelection = VisibleSelection(visiblePos);
m_frame->setSelectionGranularity(CharacterGranularity);
}
if (m_frame->shouldChangeSelection(newSelection))
m_frame->selection()->setSelection(newSelection);
return true;
}
bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)
{
#if ENABLE(DRAG_SUPPORT)
dragState().m_dragSrc = 0;
#endif
bool singleClick = event.event().clickCount() <= 1;
m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode());
#if ENABLE(DRAG_SUPPORT)
m_mouseDownMayStartDrag = singleClick;
#endif
m_mouseDownWasSingleClickInSelection = false;
m_mouseDown = event.event();
if (event.isOverWidget() && passWidgetMouseDownEventToWidget(event))
return true;
#if ENABLE(SVG)
if (m_frame->document()->isSVGDocument() &&
static_cast<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;
#if ENABLE(DRAG_SUPPORT)
m_dragStartPos = event.event().pos();
#endif
bool swallowEvent = false;
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->renderBox() && m_mousePressNode->renderBox()->canBeProgramaticallyScrolled(true));
return swallowEvent;
}
#if ENABLE(DRAG_SUPPORT)
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) {
RenderObject* renderer = targetNode->renderer();
while (renderer && (!renderer->isBox() || !toRenderBox(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
{
if (!m_frame->contentRenderer() || !m_frame->contentRenderer()->hasLayer())
return false;
if (event.button() != LeftButton || event.clickCount() != 1)
return false;
bool DHTMLFlag;
bool UAFlag;
allowDHTMLDrag(DHTMLFlag, UAFlag);
if (!DHTMLFlag && !UAFlag)
return false;
FrameView* view = m_frame->view();
if (!view)
return false;
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(view->windowToContents(event.pos()));
m_frame->contentRenderer()->layer()->hitTest(request, result);
bool srcIsDHTML;
return result.innerNode() && result.innerNode()->renderer()->draggableNode(DHTMLFlag, UAFlag, result.point().x(), result.point().y(), srcIsDHTML);
}
void EventHandler::updateSelectionForMouseDrag()
{
FrameView* view = m_frame->view();
if (!view)
return;
RenderView* renderer = m_frame->contentRenderer();
if (!renderer)
return;
RenderLayer* layer = renderer->layer();
if (!layer)
return;
HitTestRequest request(HitTestRequest::ReadOnly |
HitTestRequest::Active |
HitTestRequest::MouseMove);
HitTestResult result(view->windowToContents(m_currentMousePosition));
layer->hitTest(request, result);
updateSelectionForMouseDrag(result.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;
VisibleSelection newSelection = m_frame->selection()->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 = VisibleSelection(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);
}
}
#endif // ENABLE(DRAG_SUPPORT)
bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event)
{
if (eventLoopHandleMouseUp(event))
return true;
return eventActivatedView(event.event());
}
bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event)
{
if (m_autoscrollInProgress)
stopAutoscrollTimer();
if (handleMouseUp(event))
return true;
m_frame->selection()->setCaretBlinkingSuspended(false);
m_mousePressed = false;
m_capturesDragging = false;
#if ENABLE(DRAG_SUPPORT)
m_mouseDownMayStartDrag = false;
#endif
m_mouseDownMayStartSelect = false;
m_mouseDownMayStartAutoscroll = false;
m_mouseDownWasInSubframe = false;
bool handled = false;
if (m_mouseDownWasSingleClickInSelection && !m_beganSelectingText
#if ENABLE(DRAG_SUPPORT)
&& m_dragStartPos == event.event().pos()
#endif
&& m_frame->selection()->isRange()
&& event.event().button() != RightButton) {
VisibleSelection newSelection;
Node *node = event.targetNode();
bool caretBrowsing = m_frame->settings()->caretBrowsingEnabled();
if (node && (caretBrowsing || node->isContentEditable()) && node->renderer()) {
VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint());
newSelection = VisibleSelection(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)
{
if (m_autoscrollTimer.isActive())
return;
setAutoscrollRenderer(renderer);
#if ENABLE(PAN_SCROLLING)
if (m_panScrollInProgress) {
m_panScrollStartPos = currentMousePosition();
if (FrameView* view = m_frame->view())
view->addPanScrollIcon(m_panScrollStartPos);
if (Page* page = m_frame->page()) {
Frame* mainFrame = page->mainFrame();
if (m_frame != mainFrame)
mainFrame->eventHandler()->setPanScrollInProgress(true);
}
}
#endif
startAutoscrollTimer();
}
void EventHandler::autoscrollTimerFired(Timer<EventHandler>*)
{
RenderObject* r = autoscrollRenderer();
if (!r || !r->isBox()) {
stopAutoscrollTimer();
return;
}
if (m_autoscrollInProgress) {
if (!m_mousePressed) {
stopAutoscrollTimer();
return;
}
toRenderBox(r)->autoscroll();
} else {
if (Page* page = m_frame->page()) {
if (!page->mainFrame()->eventHandler()->panScrollInProgress()) {
stopAutoscrollTimer();
return;
}
}
#if ENABLE(PAN_SCROLLING)
setPanScrollCursor();
toRenderBox(r)->panScroll(m_panScrollStartPos);
#endif
}
}
#if ENABLE(PAN_SCROLLING)
void EventHandler::setPanScrollCursor()
{
}
#endif // ENABLE(PAN_SCROLLING)
RenderObject* EventHandler::autoscrollRenderer() const
{
return m_autoscrollRenderer;
}
void EventHandler::updateAutoscrollRenderer()
{
if (!m_autoscrollRenderer)
return;
HitTestResult hitTest = hitTestResultAtPoint(m_panScrollStartPos, true);
if (Node* nodeAtPoint = hitTest.innerNode())
m_autoscrollRenderer = nodeAtPoint->renderer();
while (m_autoscrollRenderer && (!m_autoscrollRenderer->isBox() || !toRenderBox(m_autoscrollRenderer)->canBeProgramaticallyScrolled(false)))
m_autoscrollRenderer = m_autoscrollRenderer->parent();
}
void EventHandler::setAutoscrollRenderer(RenderObject* renderer)
{
m_autoscrollRenderer = renderer;
}
#if ENABLE(DRAG_SUPPORT)
void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const
{
flagDHTML = false;
flagUA = false;
if (!m_frame)
return;
Page* page = m_frame->page();
if (!page)
return;
FrameView* view = m_frame->view();
if (!view)
return;
unsigned mask = page->dragController()->delegateDragSourceAction(view->contentsToWindow(m_mouseDownPos));
flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone;
flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection));
}
#endif // ENABLE(DRAG_SUPPORT)
HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent, bool ignoreClipping, HitTestScrollbars testScrollbars)
{
HitTestResult result(point);
if (!m_frame->contentRenderer())
return result;
int hitType = HitTestRequest::ReadOnly | HitTestRequest::Active;
if (ignoreClipping)
hitType |= HitTestRequest::IgnoreClipping;
m_frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), result);
while (true) {
Node* n = result.innerNode();
if (!result.isOverWidget() || !n || !n->renderer() || !n->renderer()->isWidget())
break;
RenderWidget* renderWidget = static_cast<RenderWidget*>(n->renderer());
Widget* widget = renderWidget->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->scrollX() - renderWidget->borderLeft() - renderWidget->paddingLeft(),
result.localPoint().y() + view->scrollY() - renderWidget->borderTop() - renderWidget->paddingTop());
HitTestResult widgetHitTestResult(widgetPoint);
frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), widgetHitTestResult);
result = widgetHitTestResult;
if (testScrollbars == ShouldHitTestScrollbars) {
Scrollbar* eventScrollbar = view->scrollbarAtPoint(point);
if (eventScrollbar)
result.setScrollbar(eventScrollbar);
}
}
Frame* resultFrame = result.innerNonSharedNode() ? result.innerNonSharedNode()->document()->frame() : 0;
if (Page* page = m_frame->page()) {
Frame* mainFrame = page->mainFrame();
if (m_frame != mainFrame && resultFrame && resultFrame != mainFrame && !resultFrame->editor()->insideVisibleArea(result.point())) {
FrameView* resultView = resultFrame->view();
FrameView* mainView = mainFrame->view();
if (resultView && mainView) {
IntPoint windowPoint = resultView->contentsToWindow(result.point());
IntPoint mainFramePoint = mainView->windowToContents(windowPoint);
result = mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping);
}
}
}
if (!allowShadowContent)
result.setToNonShadowAncestor();
return result;
}
void EventHandler::startAutoscrollTimer()
{
m_autoscrollTimer.startRepeating(autoscrollInterval);
}
void EventHandler::stopAutoscrollTimer(bool rendererIsBeingDestroyed)
{
if (m_autoscrollInProgress) {
if (m_mouseDownWasInSubframe) {
if (Frame* subframe = subframeForTargetNode(m_mousePressNode.get()))
subframe->eventHandler()->stopAutoscrollTimer(rendererIsBeingDestroyed);
return;
}
}
if (autoscrollRenderer()) {
if (!rendererIsBeingDestroyed && (m_autoscrollInProgress || m_panScrollInProgress))
toRenderBox(autoscrollRenderer())->stopAutoscroll();
#if ENABLE(PAN_SCROLLING)
if (m_panScrollInProgress) {
if (FrameView* view = m_frame->view()) {
view->removePanScrollIcon();
view->setCursor(pointerCursor());
}
}
#endif
setAutoscrollRenderer(0);
}
m_autoscrollTimer.stop();
m_panScrollInProgress = false;
if (Page* page = m_frame->page()) {
Frame* mainFrame = page->mainFrame();
if (m_frame != mainFrame)
mainFrame->eventHandler()->setPanScrollInProgress(false);
}
m_autoscrollInProgress = false;
}
Node* EventHandler::mousePressNode() const
{
return m_mousePressNode.get();
}
void EventHandler::setMousePressNode(PassRefPtr<Node> node)
{
m_mousePressNode = node;
}
bool EventHandler::scrollOverflow(ScrollDirection direction, ScrollGranularity granularity)
{
Node* node = m_frame->document()->focusedNode();
if (!node)
node = m_mousePressNode.get();
if (node) {
RenderObject* r = node->renderer();
if (r && !r->isListBox())
return r->enclosingBox()->scroll(direction, granularity);
}
return false;
}
bool EventHandler::scrollRecursively(ScrollDirection direction, ScrollGranularity granularity)
{
bool handled = scrollOverflow(direction, granularity);
if (!handled) {
Frame* frame = m_frame;
do {
FrameView* view = frame->view();
handled = view ? view->scroll(direction, granularity) : false;
frame = frame->tree()->parent();
} while (!handled && frame);
}
return handled;
}
IntPoint EventHandler::currentMousePosition() const
{
return m_currentMousePosition;
}
Frame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)
{
if (!hitTestResult.isOverWidget())
return 0;
return subframeForTargetNode(hitTestResult.targetNode());
}
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 IntPoint documentPointForWindowPoint(Frame* frame, const IntPoint& windowPoint)
{
FrameView* view = frame->view();
return view ? view->windowToContents(windowPoint) : windowPoint;
}
bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
m_mousePressed = true;
m_capturesDragging = true;
m_currentMousePosition = mouseEvent.pos();
m_mouseDownTimestamp = mouseEvent.timestamp();
#if ENABLE(DRAG_SUPPORT)
m_mouseDownMayStartDrag = false;
#endif
m_mouseDownMayStartSelect = false;
m_mouseDownMayStartAutoscroll = false;
if (FrameView* view = m_frame->view())
m_mouseDownPos = view->windowToContents(mouseEvent.pos());
else {
invalidateClick();
return false;
}
m_mouseDownWasInSubframe = false;
HitTestRequest request(HitTestRequest::Active);
IntPoint documentPoint = documentPointForWindowPoint(m_frame, mouseEvent.pos());
MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
if (!mev.targetNode()) {
invalidateClick();
return false;
}
m_mousePressNode = mev.targetNode();
#if ENABLE(INSPECTOR)
if (Page* page = m_frame->page()) {
InspectorController* inspector = page->inspectorController();
if (inspector && inspector->enabled() && inspector->searchingForNodeInPage()) {
inspector->handleMousePressOnNode(m_mousePressNode.get());
invalidateClick();
return true;
}
}
#endif // ENABLE(INSPECTOR)
Frame* subframe = subframeForHitTestResult(mev);
if (subframe && passMousePressEventToSubframe(mev, subframe)) {
m_capturesDragging = subframe->eventHandler()->capturesDragging();
if (m_mousePressed && m_capturesDragging)
m_capturingMouseEventsNode = mev.targetNode();
invalidateClick();
return true;
}
#if ENABLE(PAN_SCROLLING)
Page* page = m_frame->page();
if (page && page->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {
stopAutoscrollTimer();
invalidateClick();
return true;
}
if (mouseEvent.button() == MiddleButton && !mev.isOverLink()) {
RenderObject* renderer = mev.targetNode()->renderer();
while (renderer && (!renderer->isBox() || !toRenderBox(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();
if (!m_clickNode) {
invalidateClick();
return false;
}
if (FrameView* view = m_frame->view()) {
RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0;
IntPoint p = view->windowToContents(mouseEvent.pos());
if (layer && layer->isPointInResizeControl(p)) {
layer->setInResizeMode(true);
m_resizeLayer = layer;
m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p);
invalidateClick();
return true;
}
}
bool swallowEvent = dispatchMouseEvent(eventNames().mousedownEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
m_capturesDragging = !swallowEvent;
if (mev.scrollbar()) {
const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get();
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())
m_lastScrollbarUnderMouse = 0;
}
if (swallowEvent) {
if (mev.scrollbar())
passMousePressEventToScrollbar(mev, mev.scrollbar());
} else {
if (mev.targetNode()->isShadowNode() && mev.targetNode()->shadowParentNode()->hasTagName(inputTag)) {
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
}
FrameView* view = m_frame->view();
Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mouseEvent.pos()) : 0;
if (!scrollbar)
scrollbar = mev.scrollbar();
if (scrollbar && passMousePressEventToScrollbar(mev, scrollbar))
swallowEvent = true;
else
swallowEvent = handleMousePressEvent(mev);
}
return swallowEvent;
}
bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
m_mousePressed = false;
m_currentMousePosition = mouseEvent.pos();
HitTestRequest request(HitTestRequest::Active);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
Frame* subframe = subframeForHitTestResult(mev);
if (subframe && passMousePressEventToSubframe(mev, subframe)) {
m_capturingMouseEventsNode = 0;
return true;
}
m_clickCount = mouseEvent.clickCount();
bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
bool swallowClickEvent = false;
if (mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)
swallowClickEvent = dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
if (m_lastScrollbarUnderMouse)
swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp();
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)
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(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false);
int hitType = HitTestRequest::MouseMove;
if (m_mousePressed && m_mouseDownMayStartSelect)
hitType |= HitTestRequest::ReadOnly;
if (m_mousePressed)
hitType |= HitTestRequest::Active;
HitTestRequest request(hitType);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
if (hoveredNode)
*hoveredNode = mev.hitTestResult();
Scrollbar* scrollbar = 0;
if (m_resizeLayer && m_resizeLayer->inResizeMode())
m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner);
else {
if (FrameView* view = m_frame->view())
scrollbar = view->scrollbarAtPoint(mouseEvent.pos());
if (!scrollbar)
scrollbar = mev.scrollbar();
if (m_lastScrollbarUnderMouse != scrollbar) {
if (m_lastScrollbarUnderMouse)
m_lastScrollbarUnderMouse->mouseExited();
m_lastScrollbarUnderMouse = m_mousePressed ? 0 : scrollbar;
}
}
bool swallowEvent = false;
RefPtr<Frame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)
passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get());
if (newSubframe) {
updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true);
if (newSubframe->view())
swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);
}
m_lastMouseMoveEventSubframe = newSubframe;
if (swallowEvent)
return true;
swallowEvent = dispatchMouseEvent(eventNames().mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true);
#if ENABLE(DRAG_SUPPORT)
if (!swallowEvent)
swallowEvent = handleMouseDraggedEvent(mev);
#endif
return swallowEvent;
}
void EventHandler::invalidateClick()
{
m_clickCount = 0;
m_clickNode = 0;
}
bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)
{
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(eventNames().mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false);
if (m_lastScrollbarUnderMouse) {
invalidateClick();
return m_lastScrollbarUnderMouse->mouseUp();
}
HitTestRequest request(HitTestRequest::MouseUp);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
if (subframe && passMouseReleaseEventToSubframe(mev, subframe)) {
m_capturingMouseEventsNode = 0;
return true;
}
m_capturingMouseEventsNode = 0;
bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
bool swallowClickEvent = false;
if (m_clickCount > 0 && mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)
swallowClickEvent = dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
if (m_resizeLayer) {
m_resizeLayer->setInResizeMode(false);
m_resizeLayer = 0;
}
bool swallowMouseReleaseEvent = false;
if (!swallowMouseUpEvent)
swallowMouseReleaseEvent = handleMouseReleaseEvent(mev);
invalidateClick();
return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard)
{
FrameView* view = m_frame->view();
if (!view)
return false;
view->resetDeferredRepaintDelay();
IntPoint contentsPos = 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;
dragTarget->dispatchEvent(me.get(), ec);
return me->defaultPrevented();
}
bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
{
bool accept = false;
if (!m_frame->view())
return false;
HitTestRequest request(HitTestRequest::ReadOnly);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);
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(eventNames().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(eventNames().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(eventNames().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(eventNames().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(eventNames().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
}
#endif // ENABLE(DRAG_SUPPORT)
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());
return m_frame->document()->prepareMouseEvent(request, documentPointForWindowPoint(m_frame, mev.pos()), mev);
}
#if ENABLE(SVG)
static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)
{
if (!referenceNode || !referenceNode->isSVGElement())
return 0;
Node* shadowTreeElement = referenceNode->shadowTreeRootNode();
if (!shadowTreeElement)
return 0;
Node* shadowTreeParentElement = shadowTreeElement->shadowParentNode();
if (!shadowTreeParentElement)
return 0;
ASSERT(shadowTreeParentElement->hasTagName(useTag));
return static_cast<SVGUseElement*>(shadowTreeParentElement)->instanceForShadowTreeElement(referenceNode);
}
#endif
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 ENABLE(SVG)
m_instanceUnderMouse = instanceAssociatedWithShadowTreeElement(result);
if (m_lastInstanceUnderMouse) {
SVGElement* lastCorrespondingElement = m_lastInstanceUnderMouse->correspondingElement();
SVGElement* lastCorrespondingUseElement = m_lastInstanceUnderMouse->correspondingUseElement();
if (lastCorrespondingElement && lastCorrespondingUseElement) {
HashSet<SVGElementInstance*> instances = lastCorrespondingElement->instancesForElement();
HashSet<SVGElementInstance*>::iterator end = instances.end();
for (HashSet<SVGElementInstance*>::iterator it = instances.begin(); it != end; ++it) {
SVGElementInstance* instance = (*it);
ASSERT(instance->correspondingElement() == lastCorrespondingElement);
if (instance == m_lastInstanceUnderMouse)
continue;
if (instance->correspondingUseElement() != lastCorrespondingUseElement)
continue;
SVGElement* shadowTreeElement = instance->shadowTreeElement();
if (!shadowTreeElement->inDocument() || m_lastNodeUnderMouse == shadowTreeElement)
continue;
m_lastNodeUnderMouse = shadowTreeElement;
m_lastInstanceUnderMouse = instance;
break;
}
}
}
#endif
if (fireMouseOverOut) {
if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) {
m_lastNodeUnderMouse = 0;
m_lastScrollbarUnderMouse = 0;
#if ENABLE(SVG)
m_lastInstanceUnderMouse = 0;
#endif
}
if (m_lastNodeUnderMouse != m_nodeUnderMouse) {
if (m_lastNodeUnderMouse)
m_lastNodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoutEvent, 0, m_nodeUnderMouse.get());
if (m_nodeUnderMouse)
m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoverEvent, 0, m_lastNodeUnderMouse.get());
}
m_lastNodeUnderMouse = m_nodeUnderMouse;
#if ENABLE(SVG)
m_lastInstanceUnderMouse = instanceAssociatedWithShadowTreeElement(m_nodeUnderMouse.get());
#endif
}
}
bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, bool , int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder)
{
if (FrameView* view = m_frame->view())
view->resetDeferredRepaintDelay();
updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);
bool swallowEvent = false;
if (m_nodeUnderMouse)
swallowEvent = m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount);
if (!swallowEvent && eventType == eventNames().mousedownEvent) {
Node* node = m_nodeUnderMouse.get();
RenderObject* renderer = node ? node->renderer() : 0;
while (renderer) {
node = renderer->node();
if (node && node->isFocusable()) {
ExceptionCode ec = 0;
Node* n = node->isShadowNode() ? node->shadowParentNode() : node;
if (m_frame->selection()->isRange() &&
m_frame->selection()->toNormalizedRange()->compareNode(n, ec) == Range::NODE_INSIDE &&
n->isDescendantOf(m_frame->document()->focusedNode()))
return false;
break;
}
renderer = renderer->parent();
}
if (Page* page = m_frame->page()) {
if (node && node->isMouseFocusable()) {
if (!page->focusController()->setFocusedNode(node, m_frame))
swallowEvent = true;
} else if (!node || !node->focused()) {
if (!page->focusController()->setFocusedNode(0, m_frame))
swallowEvent = true;
}
}
}
return swallowEvent;
}
bool EventHandler::handleWheelEvent(PlatformWheelEvent& e)
{
Document* doc = m_frame->document();
RenderObject* docRenderer = doc->renderer();
if (!docRenderer)
return false;
RefPtr<FrameView> protector(m_frame->view());
FrameView* view = m_frame->view();
if (!view)
return false;
IntPoint vPoint = view->windowToContents(e.pos());
Node* node;
bool isOverWidget;
bool didSetLatchedNode = false;
if (m_useLatchedWheelEventNode) {
if (!m_latchedWheelEventNode) {
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(vPoint);
doc->renderView()->layer()->hitTest(request, result);
m_latchedWheelEventNode = result.innerNode();
m_widgetIsLatched = result.isOverWidget();
didSetLatchedNode = true;
}
node = m_latchedWheelEventNode.get();
isOverWidget = m_widgetIsLatched;
} else {
if (m_latchedWheelEventNode)
m_latchedWheelEventNode = 0;
if (m_previousWheelScrolledNode)
m_previousWheelScrolledNode = 0;
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(vPoint);
doc->renderView()->layer()->hitTest(request, result);
node = result.innerNode();
isOverWidget = result.isOverWidget();
}
if (node) {
RenderObject* target = node->renderer();
if (isOverWidget && target && target->isWidget()) {
Widget* widget = static_cast<RenderWidget*>(target)->widget();
if (widget && passWheelEventToWidget(e, widget)) {
e.accept();
return true;
}
}
node = node->shadowAncestorNode();
node->dispatchWheelEvent(e);
if (e.isAccepted())
return true;
while (node && !node->renderer())
node = node->parent();
if (node && node->renderer()) {
Node* stopNode = m_previousWheelScrolledNode.get();
scrollAndAcceptEvent(e.deltaX(), ScrollLeft, ScrollRight, e, node, &stopNode);
scrollAndAcceptEvent(e.deltaY(), ScrollUp, ScrollDown, e, node, &stopNode);
if (!m_useLatchedWheelEventNode)
m_previousWheelScrolledNode = stopNode;
}
}
if (e.isAccepted())
return true;
view = m_frame->view();
if (!view)
return false;
view->wheelEvent(e);
return e.isAccepted();
}
#if ENABLE(CONTEXT_MENUS)
bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event)
{
Document* doc = m_frame->document();
FrameView* v = m_frame->view();
if (!v)
return false;
bool swallowEvent;
IntPoint viewportPos = v->windowToContents(event.pos());
HitTestRequest request(HitTestRequest::Active);
MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event);
#if !PLATFORM(GTK) && !PLATFORM(CHROMIUM)
if (!m_frame->selection()->contains(viewportPos) &&
(m_frame->selection()->isContentEditable() || (mev.targetNode() && mev.targetNode()->isTextNode()))) {
m_mouseDownMayStartSelect = true; selectClosestWordOrLinkFromMouseEvent(mev);
}
#endif
swallowEvent = dispatchMouseEvent(eventNames().contextmenuEvent, mev.targetNode(), true, 0, event, true);
return swallowEvent;
}
#endif // ENABLE(CONTEXT_MENUS)
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->node())
return node->dispatchEvent(eventNames().selectstartEvent, true, true);
}
return true;
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::canMouseDragExtendSelect(Node* node)
{
if (!node || !node->renderer())
return true;
for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) {
if (Node* node = curr->node())
return node->dispatchEvent(eventNames().selectstartEvent, true, true);
}
return true;
}
#endif // ENABLE(DRAG_SUPPORT)
void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet)
{
m_frameSetBeingResized = frameSet;
}
void EventHandler::resizeLayerDestroyed()
{
ASSERT(m_resizeLayer);
m_resizeLayer = 0;
}
void EventHandler::hoverTimerFired(Timer<EventHandler>*)
{
m_hoverTimer.stop();
ASSERT(m_frame);
ASSERT(m_frame->document());
if (RenderView* renderer = m_frame->contentRenderer()) {
if (FrameView* view = m_frame->view()) {
HitTestRequest request(HitTestRequest::MouseMove);
HitTestResult result(view->windowToContents(m_currentMousePosition));
renderer->layer()->hitTest(request, result);
m_frame->document()->updateStyleIfNeeded();
}
}
}
static Node* eventTargetNodeForDocument(Document* doc)
{
if (!doc)
return 0;
Node* node = doc->focusedNode();
if (!node && doc->isHTMLDocument())
node = doc->body();
if (!node)
node = doc->documentElement();
return node;
}
bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)
{
ASSERT(!(accessKeyModifiers() & PlatformKeyboardEvent::ShiftKey));
if ((evt.modifiers() & ~PlatformKeyboardEvent::ShiftKey) != accessKeyModifiers())
return false;
String key = evt.unmodifiedText();
Element* elem = m_frame->document()->getElementByAccessKey(key.lower());
if (!elem)
return false;
elem->accessKeyAction(false);
return true;
}
bool EventHandler::needsKeyboardEventDisambiguationQuirks() const
{
return false;
}
bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)
{
#if ENABLE(PAN_SCROLLING)
if (Page* page = m_frame->page()) {
if (page->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {
static const char* const escapeKeyIdentifier = "U+001B";
if (initialKeyEvent.keyIdentifier() == escapeKeyIdentifier && initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp)
stopAutoscrollTimer();
return true;
}
}
#endif
RefPtr<Node> node = eventTargetNodeForDocument(m_frame->document());
if (!node)
return false;
if (FrameView* view = m_frame->view())
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 = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
if (matchedAnAccessKey)
keydown->setDefaultPrevented(true);
keydown->setTarget(node);
if (initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) {
node->dispatchEvent(keydown, ec);
return keydown->defaultHandled() || keydown->defaultPrevented();
}
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);
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 = KeyboardEvent::create(keyPressEvent, m_frame->document()->defaultView());
keypress->setTarget(node);
if (keydownResult)
keypress->setDefaultPrevented(true);
#if PLATFORM(MAC)
keypress->keypressCommands() = keydown->keypressCommands();
#endif
node->dispatchEvent(keypress, ec);
return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled();
}
void EventHandler::handleKeyboardSelectionMovement(KeyboardEvent* event)
{
if (!event)
return;
String key = event->keyIdentifier();
bool isShifted = event->getModifierState("Shift");
bool isOptioned = event->getModifierState("Alt");
bool isCommanded = event->getModifierState("Meta");
if (key == "Up") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::BACKWARD, (isCommanded) ? DocumentBoundary : LineGranularity, true);
event->setDefaultHandled();
}
else if (key == "Down") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::FORWARD, (isCommanded) ? DocumentBoundary : LineGranularity, true);
event->setDefaultHandled();
}
else if (key == "Left") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::LEFT, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
event->setDefaultHandled();
}
else if (key == "Right") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::RIGHT, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
event->setDefaultHandled();
}
}
void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event)
{
if (event->type() == eventNames().keydownEvent) {
m_frame->editor()->handleKeyboardEvent(event);
if (event->defaultHandled())
return;
if (event->keyIdentifier() == "U+0009")
defaultTabEventHandler(event);
if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled())
handleKeyboardSelectionMovement(event);
}
if (event->type() == eventNames().keypressEvent) {
m_frame->editor()->handleKeyboardEvent(event);
if (event->defaultHandled())
return;
if (event->charCode() == ' ')
defaultSpaceEventHandler(event);
}
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::dragHysteresisExceeded(const FloatPoint& floatDragViewportLocation) const
{
IntPoint dragViewportLocation((int)floatDragViewportLocation.x(), (int)floatDragViewportLocation.y());
return dragHysteresisExceeded(dragViewportLocation);
}
bool EventHandler::dragHysteresisExceeded(const IntPoint& dragViewportLocation) const
{
FrameView* view = m_frame->view();
if (!view)
return false;
IntPoint dragLocation = view->windowToContents(dragViewportLocation);
IntSize delta = dragLocation - m_mouseDownPos;
int threshold = GeneralDragHysteresis;
if (dragState().m_dragSrcIsImage)
threshold = ImageDragHysteresis;
else if (dragState().m_dragSrcIsLink)
threshold = LinkDragHysteresis;
else if (dragState().m_dragSrcInSelection)
threshold = TextDragHysteresis;
return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold;
}
void EventHandler::freeClipboard()
{
if (dragState().m_dragClipboard)
dragState().m_dragClipboard->setAccessPolicy(ClipboardNumb);
}
bool EventHandler::shouldDragAutoNode(Node* node, const IntPoint& point) const
{
if (!node || node->hasChildNodes() || !m_frame->view())
return false;
Page* page = m_frame->page();
return page && page->dragController()->mayStartDragAtEventLocation(m_frame, point);
}
void EventHandler::dragSourceMovedTo(const PlatformMouseEvent& event)
{
if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML)
dispatchDragSrcEvent(eventNames().dragEvent, event);
}
void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation)
{
if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
dragState().m_dragClipboard->setDestinationOperation(operation);
dispatchDragSrcEvent(eventNames().dragendEvent, event);
}
freeClipboard();
dragState().m_dragSrc = 0;
m_mouseDownMayStartDrag = false;
}
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) {
m_mousePressed = false;
return false;
}
if (eventLoopHandleMouseDragged(event))
return true;
if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
allowDHTMLDrag(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA);
if (!dragState().m_dragSrcMayBeDHTML && !dragState().m_dragSrcMayBeUA)
m_mouseDownMayStartDrag = false; }
if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(m_mouseDownPos);
m_frame->contentRenderer()->layer()->hitTest(request, result);
Node* node = result.innerNode();
if (node && node->renderer())
dragState().m_dragSrc = node->renderer()->draggableNode(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA,
m_mouseDownPos.x(), m_mouseDownPos.y(), dragState().m_dragSrcIsDHTML);
else
dragState().m_dragSrc = 0;
if (!dragState().m_dragSrc)
m_mouseDownMayStartDrag = false; else {
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);
}
}
if (m_mouseDownMayStartDrag && !dragState().m_dragSrcIsImage && dragState().m_dragSrcInSelection && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) {
m_mouseDownMayStartDrag = false;
dragState().m_dragSrc = 0;
if (eventActivatedView(event.event()))
m_mouseDownMayStartSelect = false;
}
if (!m_mouseDownMayStartDrag)
return !mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll;
if (FrameView* view = m_frame->view())
view->setCursor(pointerCursor());
if (!dragHysteresisExceeded(event.event().pos()))
return true;
invalidateClick();
DragOperation srcOp = DragOperationNone;
freeClipboard(); dragState().m_dragClipboard = createDraggingClipboard();
if (dragState().m_dragSrcMayBeDHTML) {
if (dragState().m_dragSrcIsDHTML) {
if (RenderObject* renderer = dragState().m_dragSrc->renderer()) {
FloatPoint absPos = renderer->localToAbsolute();
IntSize delta = m_mouseDownPos - roundedIntPoint(absPos);
dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), IntPoint() + delta);
} else {
m_mouseDownMayStartDrag = false;
goto cleanupDrag;
}
}
m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown)
&& !m_frame->selection()->isInPasswordField();
dragState().m_dragClipboard->setAccessPolicy(ClipboardImageWritable);
if (m_mouseDownMayStartDrag) {
dragState().m_dragClipboard->sourceOperation(srcOp);
dragState().m_dragClipboard->setDragHasStarted();
}
}
if (m_mouseDownMayStartDrag) {
Page* page = m_frame->page();
DragController* dragController = page ? page->dragController() : 0;
bool startedDrag = dragController && dragController->startDrag(m_frame, dragState().m_dragClipboard.get(), srcOp, event.event(), m_mouseDownPos, dragState().m_dragSrcIsDHTML);
if (!startedDrag && dragState().m_dragSrcMayBeDHTML) {
dispatchDragSrcEvent(eventNames().dragendEvent, event.event());
m_mouseDownMayStartDrag = false;
}
}
cleanupDrag:
if (!m_mouseDownMayStartDrag) {
freeClipboard();
dragState().m_dragSrc = 0;
}
return true;
}
#endif // ENABLE(DRAG_SUPPORT)
bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, bool isLineBreak, bool isBackTab)
{
ASSERT(!underlyingEvent || !underlyingEvent->isKeyboardEvent() || static_cast<KeyboardEvent*>(underlyingEvent)->type() == eventNames().keypressEvent);
if (!m_frame)
return false;
EventTarget* target;
if (underlyingEvent)
target = underlyingEvent->target();
else
target = eventTargetNodeForDocument(m_frame->document());
if (!target)
return false;
if (FrameView* view = m_frame->view())
view->resetDeferredRepaintDelay();
RefPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text);
event->setUnderlyingEvent(underlyingEvent);
event->setIsLineBreak(isLineBreak);
event->setIsBackTab(isBackTab);
ExceptionCode ec;
target->dispatchEvent(event, ec);
return event->defaultHandled();
}
#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();
}
}
#if PLATFORM(QT) || PLATFORM(MAC)
void EventHandler::defaultSpaceEventHandler(KeyboardEvent*)
{
}
#else
void EventHandler::defaultSpaceEventHandler(KeyboardEvent* event)
{
ScrollDirection direction = event->shiftKey() ? ScrollUp : ScrollDown;
if (scrollOverflow(direction, ScrollByPage)) {
event->setDefaultHandled();
return;
}
FrameView* view = m_frame->view();
if (!view)
return;
if (view->scroll(direction, ScrollByPage))
event->setDefaultHandled();
}
#endif
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()
{
Document* d = m_frame->document();
if (Node* node = d->focusedNode()) {
if (RenderObject* r = node->renderer()) {
if (r->isTextField())
static_cast<RenderTextControlSingleLine*>(r)->capsLockStateMayHaveChanged();
}
}
}
void EventHandler::sendResizeEvent()
{
m_frame->document()->dispatchWindowEvent(eventNames().resizeEvent, false, false);
}
void EventHandler::sendScrollEvent()
{
FrameView* v = m_frame->view();
if (!v)
return;
v->setWasScrolledByUser(true);
m_frame->document()->dispatchEvent(eventNames().scrollEvent, true, false);
}
bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar)
{
if (!scrollbar || !scrollbar->enabled())
return false;
return scrollbar->mouseDown(mev.event());
}
}