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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
* (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef EventTarget_h
#define EventTarget_h
#include "AtomicStringHash.h"
#include "EventNames.h"
#include "RegisteredEventListener.h"
#include <wtf/Forward.h>
namespace WebCore {
class AbstractWorker;
class AtomicString;
class DedicatedWorkerContext;
class DOMApplicationCache;
class DOMWindow;
class Event;
class EventListener;
class EventSource;
class MessagePort;
class Node;
class Notification;
class SVGElementInstance;
class ScriptExecutionContext;
class SharedWorker;
class SharedWorkerContext;
class WebSocket;
class Worker;
class XMLHttpRequest;
class XMLHttpRequestUpload;
typedef int ExceptionCode;
struct FiringEventIterator {
FiringEventIterator(const AtomicString& eventType, size_t& iterator, size_t& end)
: eventType(eventType)
, iterator(iterator)
, end(end)
{
}
const AtomicString& eventType;
size_t& iterator;
size_t& end;
};
typedef Vector<FiringEventIterator, 1> FiringEventIteratorVector;
typedef Vector<RegisteredEventListener, 1> EventListenerVector;
typedef HashMap<AtomicString, EventListenerVector> EventListenerMap;
struct EventTargetData {
EventListenerMap eventListenerMap;
FiringEventIteratorVector firingEventIterators;
};
class EventTarget {
public:
void ref() { refEventTarget(); }
void deref() { derefEventTarget(); }
virtual EventSource* toEventSource();
virtual MessagePort* toMessagePort();
virtual Node* toNode();
virtual DOMWindow* toDOMWindow();
virtual XMLHttpRequest* toXMLHttpRequest();
virtual XMLHttpRequestUpload* toXMLHttpRequestUpload();
#if ENABLE(OFFLINE_WEB_APPLICATIONS)
virtual DOMApplicationCache* toDOMApplicationCache();
#endif
#if ENABLE(SVG)
virtual SVGElementInstance* toSVGElementInstance();
#endif
#if ENABLE(WORKERS)
virtual Worker* toWorker();
virtual DedicatedWorkerContext* toDedicatedWorkerContext();
#endif
#if ENABLE(SHARED_WORKERS)
virtual SharedWorker* toSharedWorker();
virtual SharedWorkerContext* toSharedWorkerContext();
#endif
#if ENABLE(WEB_SOCKETS)
virtual WebSocket* toWebSocket();
#endif
#if ENABLE(NOTIFICATIONS)
virtual Notification* toNotification();
#endif
virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture);
virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture);
virtual void removeAllEventListeners();
virtual bool dispatchEvent(PassRefPtr<Event>);
bool dispatchEvent(PassRefPtr<Event>, ExceptionCode&); // DOM API
// Used for legacy "onEvent" attribute APIs.
bool setAttributeEventListener(const AtomicString& eventType, PassRefPtr<EventListener>);
bool clearAttributeEventListener(const AtomicString& eventType);
EventListener* getAttributeEventListener(const AtomicString& eventType);
bool hasEventListeners();
bool hasEventListeners(const AtomicString& eventType);
const EventListenerVector& getEventListeners(const AtomicString& eventType);
bool fireEventListeners(Event*);
bool isFiringEventListeners();
#if USE(JSC)
void markEventListeners(JSC::MarkStack&);
void invalidateEventListeners();
#endif
protected:
virtual ~EventTarget();
virtual EventTargetData* eventTargetData() = 0;
virtual EventTargetData* ensureEventTargetData() = 0;
private:
virtual void refEventTarget() = 0;
virtual void derefEventTarget() = 0;
};
#define DEFINE_ATTRIBUTE_EVENT_LISTENER(attribute) \
EventListener* on##attribute() { return getAttributeEventListener(eventNames().attribute##Event); } \
void setOn##attribute(PassRefPtr<EventListener> listener) { setAttributeEventListener(eventNames().attribute##Event, listener); } \
#define DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(attribute) \
virtual EventListener* on##attribute() { return getAttributeEventListener(eventNames().attribute##Event); } \
virtual void setOn##attribute(PassRefPtr<EventListener> listener) { setAttributeEventListener(eventNames().attribute##Event, listener); } \
#define DEFINE_WINDOW_ATTRIBUTE_EVENT_LISTENER(attribute) \
EventListener* on##attribute() { return document()->getWindowAttributeEventListener(eventNames().attribute##Event); } \
void setOn##attribute(PassRefPtr<EventListener> listener) { document()->setWindowAttributeEventListener(eventNames().attribute##Event, listener); } \
#define DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(attribute, eventName) \
EventListener* on##attribute() { return getAttributeEventListener(eventNames().eventName##Event); } \
void setOn##attribute(PassRefPtr<EventListener> listener) { setAttributeEventListener(eventNames().eventName##Event, listener); } \
#define DEFINE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(recipient, attribute) \
EventListener* on##attribute() { return recipient ? recipient->getAttributeEventListener(eventNames().attribute##Event) : 0; } \
void setOn##attribute(PassRefPtr<EventListener> listener) { if (recipient) recipient->setAttributeEventListener(eventNames().attribute##Event, listener); } \
#ifndef NDEBUG
void forbidEventDispatch();
void allowEventDispatch();
bool eventDispatchForbidden();
#else
inline void forbidEventDispatch() { }
inline void allowEventDispatch() { }
#endif
#if USE(JSC)
inline void EventTarget::markEventListeners(JSC::MarkStack& markStack)
{
EventTargetData* d = eventTargetData();
if (!d)
return;
EventListenerMap::iterator end = d->eventListenerMap.end();
for (EventListenerMap::iterator it = d->eventListenerMap.begin(); it != end; ++it) {
EventListenerVector& entry = it->second;
for (size_t i = 0; i < entry.size(); ++i)
entry[i].listener->markJSFunction(markStack);
}
}
inline void EventTarget::invalidateEventListeners()
{
EventTargetData* d = eventTargetData();
if (!d)
return;
d->eventListenerMap.clear();
}
#endif
inline bool EventTarget::isFiringEventListeners()
{
EventTargetData* d = eventTargetData();
if (!d)
return false;
return d->firingEventIterators.size() != 0;
}
inline bool EventTarget::hasEventListeners()
{
EventTargetData* d = eventTargetData();
if (!d)
return false;
return !d->eventListenerMap.isEmpty();
}
inline bool EventTarget::hasEventListeners(const AtomicString& eventType)
{
EventTargetData* d = eventTargetData();
if (!d)
return false;
return d->eventListenerMap.contains(eventType);
}
} // namespace WebCore
#endif // EventTarget_h
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