void EventTargetNode::dispatchWindowEvent(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg)
{
ASSERT(!eventDispatchForbidden());
RefPtr<Document> doc = document();
dispatchWindowEvent(Event::create(eventType, canBubbleArg, cancelableArg));
if (eventType == eventNames().loadEvent) {
// For onload events, send a separate load event to the enclosing frame only.
// This is a DOM extension and is independent of bubbling/capturing rules of
// the DOM.
Element* ownerElement = doc->ownerElement();
if (ownerElement) {
RefPtr<Event> ownerEvent = Event::create(eventType, false, cancelableArg);
ownerEvent->setTarget(ownerElement);
ownerElement->dispatchGenericEvent(ownerEvent.release());
}
}
}
bool EventTargetNode::dispatchMouseEvent(const PlatformMouseEvent& event, const AtomicString& eventType,
int detail, Node* relatedTarget)
{
ASSERT(!eventDispatchForbidden());
IntPoint contentsPos;
if (FrameView* view = document()->view())
contentsPos = view->windowToContents(event.pos());
short button = event.button();
ASSERT(event.eventType() == MouseEventMoved || button != NoButton);
return dispatchMouseEvent(eventType, button, detail,
contentsPos.x(), contentsPos.y(), event.globalX(), event.globalY(),
event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
false, relatedTarget);
}
void EventTargetNode::dispatchWheelEvent(PlatformWheelEvent& e)
{
ASSERT(!eventDispatchForbidden());
if (e.deltaX() == 0 && e.deltaY() == 0)
return;
FrameView* view = document()->view();
if (!view)
return;
IntPoint pos = view->windowToContents(e.pos());
RefPtr<WheelEvent> we = WheelEvent::create(e.deltaX(), e.deltaY(),
document()->defaultView(), e.globalX(), e.globalY(), pos.x(), pos.y(),
e.ctrlKey(), e.altKey(), e.shiftKey(), e.metaKey());
ExceptionCode ec = 0;
if (!dispatchEvent(we.release(), ec, true))
e.accept();
}
bool SVGElementInstance::dispatchEvent(PassRefPtr<Event> e, ExceptionCode& ec)
{
RefPtr<Event> evt(e);
ASSERT(!eventDispatchForbidden());
if (!evt || evt->type().isEmpty()) {
ec = EventException::UNSPECIFIED_EVENT_TYPE_ERR;
return false;
}
// The event has to be dispatched to the shadowTreeElement(), not the correspondingElement()!
SVGElement* element = shadowTreeElement();
if (!element)
return false;
evt->setTarget(this);
RefPtr<FrameView> view = element->document()->view();
return element->dispatchGenericEvent(evt.release(), ec);
}
bool EventDispatcher::dispatchMouseEvent(Node* node, const PlatformMouseEvent& event, const AtomicString& eventType,
int detail, Node* relatedTargetArg)
{
ASSERT(!eventDispatchForbidden());
ASSERT(event.eventType() == MouseEventMoved || event.button() != NoButton);
if (node->disabled()) // Don't even send DOM events for disabled controls..
return true;
if (eventType.isEmpty())
return false; // Shouldn't happen.
EventDispatcher dispatcher(node);
// Attempting to dispatch with a non-EventTarget relatedTarget causes the relatedTarget to be silently ignored.
RefPtr<Node> relatedTarget = pullOutOfShadow(relatedTargetArg);
RefPtr<MouseEvent> mouseEvent = MouseEvent::create(eventType, node->document()->defaultView(), event, detail, relatedTarget);
bool swallowEvent = false;
dispatcher.dispatchEvent(mouseEvent);
bool defaultHandled = mouseEvent->defaultHandled();
bool defaultPrevented = mouseEvent->defaultPrevented();
if (defaultHandled || defaultPrevented)
swallowEvent = true;
// Special case: If it's a double click event, we also send the dblclick event. This is not part
// of the DOM specs, but is used for compatibility with the ondblclick="" attribute. This is treated
// as a separate event in other DOM-compliant browsers like Firefox, and so we do the same.
if (eventType == eventNames().clickEvent && detail == 2) {
RefPtr<Event> doubleClickEvent = MouseEvent::create(eventNames().dblclickEvent, node->document()->defaultView(), event, detail, relatedTarget);
if (defaultHandled)
doubleClickEvent->setDefaultHandled();
dispatcher.dispatchEvent(doubleClickEvent);
if (doubleClickEvent->defaultHandled() || doubleClickEvent->defaultPrevented())
swallowEvent = true;
}
return swallowEvent;
}
void EventTargetNode::dispatchSimulatedMouseEvent(const AtomicString& eventType,
PassRefPtr<Event> underlyingEvent)
{
ASSERT(!eventDispatchForbidden());
bool ctrlKey = false;
bool altKey = false;
bool shiftKey = false;
bool metaKey = false;
if (UIEventWithKeyState* keyStateEvent = findEventWithKeyState(underlyingEvent.get())) {
ctrlKey = keyStateEvent->ctrlKey();
altKey = keyStateEvent->altKey();
shiftKey = keyStateEvent->shiftKey();
metaKey = keyStateEvent->metaKey();
}
// Like Gecko, we just pass 0 for everything when we make a fake mouse event.
// Internet Explorer instead gives the current mouse position and state.
dispatchMouseEvent(eventType, 0, 0, 0, 0, 0, 0,
ctrlKey, altKey, shiftKey, metaKey, true, 0, underlyingEvent);
}
bool EventDispatcher::dispatchEvent(PassRefPtr<Event> event)
{
event->setTarget(eventTargetRespectingSVGTargetRules(m_node.get()));
ASSERT(!eventDispatchForbidden());
ASSERT(event->target());
ASSERT(!event->type().isNull()); // JavaScript code can create an event with an empty name, but not null.
RefPtr<EventTarget> originalTarget = event->target();
ensureEventAncestors(event.get());
WindowEventContext windowContext(event.get(), m_node.get(), topEventContext());
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willDispatchEvent(m_node->document(), *event, windowContext.window(), m_node.get(), m_ancestors);
// Give the target node a chance to do some work before DOM event handlers get a crack.
void* data = m_node->preDispatchEventHandler(event.get());
if (m_ancestors.isEmpty() || m_shouldPreventDispatch || event->propagationStopped())
goto doneDispatching;
// Trigger capturing event handlers, starting at the top and working our way down.
event->setEventPhase(Event::CAPTURING_PHASE);
if (windowContext.handleLocalEvents(event.get()) && event->propagationStopped())
goto doneDispatching;
for (size_t i = m_ancestors.size() - 1; i > 0; --i) {
const EventContext& eventContext = m_ancestors[i];
if (eventContext.currentTargetSameAsTarget()) {
if (event->bubbles())
continue;
event->setEventPhase(Event::AT_TARGET);
} else
event->setEventPhase(Event::CAPTURING_PHASE);
eventContext.handleLocalEvents(event.get());
if (event->propagationStopped())
goto doneDispatching;
}
event->setEventPhase(Event::AT_TARGET);
event->setTarget(originalTarget.get());
event->setCurrentTarget(eventTargetRespectingSVGTargetRules(m_node.get()));
m_ancestors[0].handleLocalEvents(event.get());
if (event->propagationStopped())
goto doneDispatching;
if (event->bubbles() && !event->cancelBubble()) {
// Trigger bubbling event handlers, starting at the bottom and working our way up.
event->setEventPhase(Event::BUBBLING_PHASE);
size_t size = m_ancestors.size();
for (size_t i = 1; i < size; ++i) {
const EventContext& eventContext = m_ancestors[i];
if (eventContext.currentTargetSameAsTarget())
event->setEventPhase(Event::AT_TARGET);
else
event->setEventPhase(Event::BUBBLING_PHASE);
eventContext.handleLocalEvents(event.get());
if (event->propagationStopped() || event->cancelBubble())
goto doneDispatching;
}
windowContext.handleLocalEvents(event.get());
}
doneDispatching:
event->setTarget(originalTarget.get());
event->setCurrentTarget(0);
event->setEventPhase(0);
// Pass the data from the preDispatchEventHandler to the postDispatchEventHandler.
m_node->postDispatchEventHandler(event.get(), data);
// Call default event handlers. While the DOM does have a concept of preventing
// default handling, the detail of which handlers are called is an internal
// implementation detail and not part of the DOM.
if (!event->defaultPrevented() && !event->defaultHandled()) {
// Non-bubbling events call only one default event handler, the one for the target.
m_node->defaultEventHandler(event.get());
ASSERT(!event->defaultPrevented());
if (event->defaultHandled())
goto doneWithDefault;
// For bubbling events, call default event handlers on the same targets in the
// same order as the bubbling phase.
if (event->bubbles()) {
size_t size = m_ancestors.size();
for (size_t i = 1; i < size; ++i) {
m_ancestors[i].node()->defaultEventHandler(event.get());
ASSERT(!event->defaultPrevented());
if (event->defaultHandled())
goto doneWithDefault;
}
}
}
doneWithDefault:
// Ensure that after event dispatch, the event's target object is the
// outermost shadow DOM boundary.
event->setTarget(windowContext.target());
event->setCurrentTarget(0);
InspectorInstrumentation::didDispatchEvent(cookie);
return !event->defaultPrevented();
}
bool EventTargetNode::dispatchProgressEvent(const AtomicString &eventType, bool lengthComputableArg, unsigned loadedArg, unsigned totalArg)
{
ASSERT(!eventDispatchForbidden());
ExceptionCode ec = 0;
return dispatchEvent(ProgressEvent::create(eventType, lengthComputableArg, loadedArg, totalArg), ec, true);
}
bool EventTargetNode::dispatchHTMLEvent(const AtomicString &eventType, bool canBubbleArg, bool cancelableArg)
{
ASSERT(!eventDispatchForbidden());
ExceptionCode ec = 0;
return dispatchEvent(Event::create(eventType, canBubbleArg, cancelableArg), ec, true);
}
bool EventTargetNode::dispatchMouseEvent(const AtomicString& eventType, int button, int detail,
int pageX, int pageY, int screenX, int screenY,
bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
bool isSimulated, Node* relatedTargetArg, PassRefPtr<Event> underlyingEvent)
{
ASSERT(!eventDispatchForbidden());
if (disabled()) // Don't even send DOM events for disabled controls..
return true;
if (eventType.isEmpty())
return false; // Shouldn't happen.
// Dispatching the first event can easily result in this node being destroyed.
// Since we dispatch up to three events here, we need to make sure we're referenced
// so the pointer will be good for the two subsequent ones.
RefPtr<Node> protect(this);
bool cancelable = eventType != eventNames().mousemoveEvent;
ExceptionCode ec = 0;
bool swallowEvent = false;
// Attempting to dispatch with a non-EventTarget relatedTarget causes the relatedTarget to be silently ignored.
RefPtr<EventTargetNode> relatedTarget = (relatedTargetArg && relatedTargetArg->isEventTargetNode())
? static_cast<EventTargetNode*>(relatedTargetArg) : 0;
if (Frame* frame = document()->frame()) {
float pageZoom = frame->pageZoomFactor();
if (pageZoom != 1.0f) {
// Adjust our pageX and pageY to account for the page zoom.
pageX = lroundf(pageX / pageZoom);
pageY = lroundf(pageY / pageZoom);
}
}
RefPtr<Event> mouseEvent = MouseEvent::create(eventType,
true, cancelable, document()->defaultView(),
detail, screenX, screenY, pageX, pageY,
ctrlKey, altKey, shiftKey, metaKey, button,
relatedTarget, 0, isSimulated);
mouseEvent->setUnderlyingEvent(underlyingEvent.get());
dispatchEvent(mouseEvent, ec);
bool defaultHandled = mouseEvent->defaultHandled();
bool defaultPrevented = mouseEvent->defaultPrevented();
if (defaultHandled || defaultPrevented)
swallowEvent = true;
// Special case: If it's a double click event, we also send the dblclick event. This is not part
// of the DOM specs, but is used for compatibility with the ondblclick="" attribute. This is treated
// as a separate event in other DOM-compliant browsers like Firefox, and so we do the same.
if (eventType == eventNames().clickEvent && detail == 2) {
RefPtr<Event> doubleClickEvent = MouseEvent::create(eventNames().dblclickEvent,
true, cancelable, document()->defaultView(),
detail, screenX, screenY, pageX, pageY,
ctrlKey, altKey, shiftKey, metaKey, button,
relatedTarget, 0, isSimulated);
doubleClickEvent->setUnderlyingEvent(underlyingEvent.get());
if (defaultHandled)
doubleClickEvent->setDefaultHandled();
dispatchEvent(doubleClickEvent, ec);
if (doubleClickEvent->defaultHandled() || doubleClickEvent->defaultPrevented())
swallowEvent = true;
}
return swallowEvent;
}
bool EventTargetNode::dispatchGenericEvent(PassRefPtr<Event> prpEvent)
{
RefPtr<Event> event(prpEvent);
ASSERT(!eventDispatchForbidden());
ASSERT(event->target());
ASSERT(!event->type().isNull()); // JavaScript code can create an event with an empty name, but not null.
// Make a vector of ancestors to send the event to.
// If the node is not in a document just send the event to it.
// Be sure to ref all of nodes since event handlers could result in the last reference going away.
RefPtr<EventTargetNode> thisNode(this);
Vector<RefPtr<ContainerNode> > ancestors;
if (inDocument()) {
for (ContainerNode* ancestor = eventParentNode(); ancestor; ancestor = ancestor->eventParentNode()) {
#if ENABLE(SVG)
// Skip <use> shadow tree elements.
if (ancestor->isSVGElement() && ancestor->isShadowNode())
continue;
#endif
ancestors.append(ancestor);
}
}
// Set up a pointer to indicate whether to dispatch window events.
// We don't dispatch load events to the window. That quirk was originally
// added because Mozilla doesn't propagate load events to the window object.
Document* documentForWindowEvents = 0;
if (event->type() != eventNames().loadEvent) {
EventTargetNode* topLevelContainer = ancestors.isEmpty() ? this : ancestors.last().get();
if (topLevelContainer->isDocumentNode())
documentForWindowEvents = static_cast<Document*>(topLevelContainer);
}
// Give the target node a chance to do some work before DOM event handlers get a crack.
void* data = preDispatchEventHandler(event.get());
if (event->propagationStopped())
goto doneDispatching;
// Trigger capturing event handlers, starting at the top and working our way down.
event->setEventPhase(Event::CAPTURING_PHASE);
if (documentForWindowEvents) {
event->setCurrentTarget(documentForWindowEvents);
documentForWindowEvents->handleWindowEvent(event.get(), true);
if (event->propagationStopped())
goto doneDispatching;
}
for (size_t i = ancestors.size(); i; --i) {
ContainerNode* ancestor = ancestors[i - 1].get();
event->setCurrentTarget(eventTargetRespectingSVGTargetRules(ancestor));
ancestor->handleLocalEvents(event.get(), true);
if (event->propagationStopped())
goto doneDispatching;
}
event->setEventPhase(Event::AT_TARGET);
// We do want capturing event listeners to be invoked here, even though
// that violates some versions of the DOM specification; Mozilla does it.
event->setCurrentTarget(eventTargetRespectingSVGTargetRules(this));
handleLocalEvents(event.get(), true);
if (event->propagationStopped())
goto doneDispatching;
handleLocalEvents(event.get(), false);
if (event->propagationStopped())
goto doneDispatching;
if (event->bubbles() && !event->cancelBubble()) {
// Trigger bubbling event handlers, starting at the bottom and working our way up.
event->setEventPhase(Event::BUBBLING_PHASE);
size_t size = ancestors.size();
for (size_t i = 0; i < size; ++i) {
ContainerNode* ancestor = ancestors[i].get();
event->setCurrentTarget(eventTargetRespectingSVGTargetRules(ancestor));
ancestor->handleLocalEvents(event.get(), false);
if (event->propagationStopped() || event->cancelBubble())
goto doneDispatching;
}
if (documentForWindowEvents) {
event->setCurrentTarget(documentForWindowEvents);
documentForWindowEvents->handleWindowEvent(event.get(), false);
if (event->propagationStopped() || event->cancelBubble())
goto doneDispatching;
}
}
doneDispatching:
event->setCurrentTarget(0);
event->setEventPhase(0);
// Pass the data from the preDispatchEventHandler to the postDispatchEventHandler.
postDispatchEventHandler(event.get(), data);
// Call default event handlers. While the DOM does have a concept of preventing
// default handling, the detail of which handlers are called is an internal
// implementation detail and not part of the DOM.
if (!event->defaultPrevented() && !event->defaultHandled()) {
// Non-bubbling events call only one default event handler, the one for the target.
defaultEventHandler(event.get());
ASSERT(!event->defaultPrevented());
if (event->defaultHandled())
goto doneWithDefault;
// For bubbling events, call default event handlers on the same targets in the
// same order as the bubbling phase.
if (event->bubbles()) {
size_t size = ancestors.size();
for (size_t i = 0; i < size; ++i) {
ContainerNode* ancestor = ancestors[i].get();
ancestor->defaultEventHandler(event.get());
ASSERT(!event->defaultPrevented());
if (event->defaultHandled())
goto doneWithDefault;
}
}
}
doneWithDefault:
Document::updateDocumentsRendering();
return !event->defaultPrevented();
}
bool EventTarget::dispatchGenericEvent(EventTargetNode* referenceNode, PassRefPtr<Event> e, ExceptionCode&, bool tempEvent)
{
RefPtr<Event> evt(e);
ASSERT(!eventDispatchForbidden());
ASSERT(evt->target());
ASSERT(!evt->type().isNull()); // JavaScript code could create an event with an empty name
// work out what nodes to send event to
DeprecatedPtrList<Node> nodeChain;
if (referenceNode->inDocument()) {
for (Node* n = referenceNode; n; n = n->eventParentNode()) {
n->ref();
nodeChain.prepend(n);
}
} else {
// if node is not in the document just send event to itself
referenceNode->ref();
nodeChain.prepend(referenceNode);
}
DeprecatedPtrListIterator<Node> it(nodeChain);
// Before we begin dispatching events, give the target node a chance to do some work prior
// to the DOM event handlers getting a crack.
void* data = preDispatchEventHandler(evt.get());
// trigger any capturing event handlers on our way down
evt->setEventPhase(Event::CAPTURING_PHASE);
it.toFirst();
// Handle window events for capture phase, except load events, this quirk is needed
// because Mozilla used to never propagate load events to the window object
if (evt->type() != eventNames().loadEvent && it.current()->isDocumentNode() && !evt->propagationStopped())
static_cast<Document*>(it.current())->handleWindowEvent(evt.get(), true);
EventTargetNode* eventTargetNode = 0;
for (; it.current() && it.current() != referenceNode && !evt->propagationStopped(); ++it) {
eventTargetNode = EventTargetNodeCast(it.current());
evt->setCurrentTarget(eventTargetRespectingSVGTargetRules(eventTargetNode));
eventTargetNode->handleLocalEvents(evt.get(), true);
}
// dispatch to the actual target node
it.toLast();
if (!evt->propagationStopped()) {
evt->setEventPhase(Event::AT_TARGET);
eventTargetNode = EventTargetNodeCast(it.current());
evt->setCurrentTarget(eventTargetRespectingSVGTargetRules(eventTargetNode));
// We do want capturing event listeners to be invoked here, even though
// that violates the specification since Mozilla does it.
eventTargetNode->handleLocalEvents(evt.get(), true);
eventTargetNode->handleLocalEvents(evt.get(), false);
}
--it;
// ok, now bubble up again (only non-capturing event handlers will be called)
// ### recalculate the node chain here? (e.g. if target node moved in document by previous event handlers)
// no. the DOM specs says:
// The chain of EventTargets from the event target to the top of the tree
// is determined before the initial dispatch of the event.
// If modifications occur to the tree during event processing,
// event flow will proceed based on the initial state of the tree.
//
// since the initial dispatch is before the capturing phase,
// there's no need to recalculate the node chain.
// (tobias)
if (evt->bubbles()) {
evt->setEventPhase(Event::BUBBLING_PHASE);
for (; it.current() && !evt->propagationStopped() && !evt->cancelBubble(); --it) {
eventTargetNode = EventTargetNodeCast(it.current());
evt->setCurrentTarget(eventTargetRespectingSVGTargetRules(eventTargetNode));
eventTargetNode->handleLocalEvents(evt.get(), false);
}
it.toFirst();
// Handle window events for bubbling phase, except load events, this quirk is needed
// because Mozilla used to never propagate load events at all
if (evt->type() != eventNames().loadEvent && it.current()->isDocumentNode() && !evt->propagationStopped() && !evt->cancelBubble()) {
evt->setCurrentTarget(EventTargetNodeCast(it.current()));
static_cast<Document*>(it.current())->handleWindowEvent(evt.get(), false);
}
}
evt->setCurrentTarget(0);
evt->setEventPhase(0); // I guess this is correct, the spec does not seem to say
// anything about the default event handler phase.
// Now call the post dispatch.
postDispatchEventHandler(evt.get(), data);
// now we call all default event handlers (this is not part of DOM - it is internal to WebCore)
it.toLast();
if (evt->bubbles())
for (; it.current() && !evt->defaultPrevented() && !evt->defaultHandled(); --it)
EventTargetNodeCast(it.current())->defaultEventHandler(evt.get());
else if (!evt->defaultPrevented() && !evt->defaultHandled())
EventTargetNodeCast(it.current())->defaultEventHandler(evt.get());
// deref all nodes in chain
it.toFirst();
for (; it.current(); ++it)
it.current()->deref(); // this may delete us
Document::updateDocumentsRendering();
// If tempEvent is true, this means that the DOM implementation
// will not be storing a reference to the event, i.e. there is no
// way to retrieve it from javascript if a script does not already
// have a reference to it in a variable. So there is no need for
// the interpreter to keep the event in it's cache
Frame* frame = referenceNode->document()->frame();
if (tempEvent && frame && frame->script()->isEnabled())
frame->script()->finishedWithEvent(evt.get());
return !evt->defaultPrevented(); // ### what if defaultPrevented was called before dispatchEvent?
}