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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 "core/events/EventListenerMap.h"
#include "core/events/ThreadLocalEventNames.h"
#include "platform/heap/Handle.h"
namespace WebCore {
class LocalDOMWindow;
class Event;
class ExceptionState;
class MessagePort;
class Node;
class TextTrack;
class TextTrackCue;
class XMLHttpRequest;
class XMLHttpRequestUpload;
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;
struct EventTargetData {
WTF_MAKE_NONCOPYABLE(EventTargetData); WTF_MAKE_FAST_ALLOCATED;
public:
EventTargetData();
~EventTargetData();
EventListenerMap eventListenerMap;
OwnPtr<FiringEventIteratorVector> firingEventIterators;
};
class EventTarget : public WillBeGarbageCollectedMixin {
public:
#if !ENABLE(OILPAN)
void ref() { refEventTarget(); }
void deref() { derefEventTarget(); }
#endif
virtual const AtomicString& interfaceName() const = 0;
virtual ExecutionContext* executionContext() const = 0;
virtual Node* toNode();
virtual LocalDOMWindow* toDOMWindow();
virtual MessagePort* toMessagePort();
// FIXME: first 2 args to addEventListener and removeEventListener should
// be required (per spec), but throwing TypeError breaks legacy content.
// http://crbug.com/353484
bool addEventListener() { return false; }
bool addEventListener(const AtomicString& eventType) { return false; }
virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false);
bool removeEventListener() { return false; }
bool removeEventListener(const AtomicString& eventType) { return false; }
virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture = false);
virtual void removeAllEventListeners();
virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>);
bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>, ExceptionState&); // DOM API
virtual void uncaughtExceptionInEventHandler();
// Used for legacy "onEvent" attribute APIs.
bool setAttributeEventListener(const AtomicString& eventType, PassRefPtr<EventListener>);
EventListener* getAttributeEventListener(const AtomicString& eventType);
bool hasEventListeners() const;
bool hasEventListeners(const AtomicString& eventType) const;
bool hasCapturingEventListeners(const AtomicString& eventType);
const EventListenerVector& getEventListeners(const AtomicString& eventType);
Vector<AtomicString> eventTypes();
bool fireEventListeners(Event*);
virtual void trace(Visitor*) { }
protected:
virtual ~EventTarget();
// Subclasses should likely not override these themselves; instead, they should subclass EventTargetWithInlineData.
virtual EventTargetData* eventTargetData() = 0;
virtual EventTargetData& ensureEventTargetData() = 0;
private:
#if !ENABLE(OILPAN)
// Subclasses should likely not override these themselves; instead, they should use the REFCOUNTED_EVENT_TARGET() macro.
virtual void refEventTarget() = 0;
virtual void derefEventTarget() = 0;
#endif
LocalDOMWindow* executingWindow();
void fireEventListeners(Event*, EventTargetData*, EventListenerVector&);
void countLegacyEvents(const AtomicString& legacyTypeName, EventListenerVector*, EventListenerVector*);
bool clearAttributeEventListener(const AtomicString& eventType);
friend class EventListenerIterator;
};
class EventTargetWithInlineData : public EventTarget {
protected:
virtual EventTargetData* eventTargetData() OVERRIDE FINAL { return &m_eventTargetData; }
virtual EventTargetData& ensureEventTargetData() OVERRIDE FINAL { return m_eventTargetData; }
private:
EventTargetData m_eventTargetData;
};
// FIXME: These macros should be split into separate DEFINE and DECLARE
// macros to avoid causing so many header includes.
#define DEFINE_ATTRIBUTE_EVENT_LISTENER(attribute) \
EventListener* on##attribute() { return getAttributeEventListener(EventTypeNames::attribute); } \
void setOn##attribute(PassRefPtr<EventListener> listener) { setAttributeEventListener(EventTypeNames::attribute, listener); } \
#define DEFINE_STATIC_ATTRIBUTE_EVENT_LISTENER(attribute) \
static EventListener* on##attribute(EventTarget& eventTarget) { return eventTarget.getAttributeEventListener(EventTypeNames::attribute); } \
static void setOn##attribute(EventTarget& eventTarget, PassRefPtr<EventListener> listener) { eventTarget.setAttributeEventListener(EventTypeNames::attribute, listener); } \
#define DEFINE_WINDOW_ATTRIBUTE_EVENT_LISTENER(attribute) \
EventListener* on##attribute() { return document().getWindowAttributeEventListener(EventTypeNames::attribute); } \
void setOn##attribute(PassRefPtr<EventListener> listener) { document().setWindowAttributeEventListener(EventTypeNames::attribute, listener); } \
#define DEFINE_STATIC_WINDOW_ATTRIBUTE_EVENT_LISTENER(attribute) \
static EventListener* on##attribute(EventTarget& eventTarget) { \
if (Node* node = eventTarget.toNode()) \
return node->document().getWindowAttributeEventListener(EventTypeNames::attribute); \
ASSERT(eventTarget.toDOMWindow()); \
return eventTarget.getAttributeEventListener(EventTypeNames::attribute); \
} \
static void setOn##attribute(EventTarget& eventTarget, PassRefPtr<EventListener> listener) { \
if (Node* node = eventTarget.toNode()) \
node->document().setWindowAttributeEventListener(EventTypeNames::attribute, listener); \
else { \
ASSERT(eventTarget.toDOMWindow()); \
eventTarget.setAttributeEventListener(EventTypeNames::attribute, listener); \
} \
}
#define DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(attribute, eventName) \
EventListener* on##attribute() { return getAttributeEventListener(EventTypeNames::eventName); } \
void setOn##attribute(PassRefPtr<EventListener> listener) { setAttributeEventListener(EventTypeNames::eventName, listener); } \
#define DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(recipient, attribute) \
EventListener* on##attribute(); \
void setOn##attribute(PassRefPtr<EventListener> listener);
#define DEFINE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(type, recipient, attribute) \
EventListener* type::on##attribute() { return recipient ? recipient->getAttributeEventListener(EventTypeNames::attribute) : 0; } \
void type::setOn##attribute(PassRefPtr<EventListener> listener) \
{ \
if (recipient) \
recipient->setAttributeEventListener(EventTypeNames::attribute, listener); \
}
inline bool EventTarget::hasEventListeners() const
{
// FIXME: We should have a const version of eventTargetData.
if (const EventTargetData* d = const_cast<EventTarget*>(this)->eventTargetData())
return !d->eventListenerMap.isEmpty();
return false;
}
inline bool EventTarget::hasEventListeners(const AtomicString& eventType) const
{
// FIXME: We should have const version of eventTargetData.
if (const EventTargetData* d = const_cast<EventTarget*>(this)->eventTargetData())
return d->eventListenerMap.contains(eventType);
return false;
}
inline bool EventTarget::hasCapturingEventListeners(const AtomicString& eventType)
{
EventTargetData* d = eventTargetData();
if (!d)
return false;
return d->eventListenerMap.containsCapturing(eventType);
}
} // namespace WebCore
#if ENABLE(OILPAN)
#define DEFINE_EVENT_TARGET_REFCOUNTING(baseClass) \
public: \
using baseClass::ref; \
using baseClass::deref; \
private: \
typedef int thisIsHereToForceASemiColonAfterThisEventTargetMacro
#define DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(baseClass)
#else
#define DEFINE_EVENT_TARGET_REFCOUNTING(baseClass) \
public: \
using baseClass::ref; \
using baseClass::deref; \
private: \
virtual void refEventTarget() OVERRIDE FINAL { ref(); } \
virtual void derefEventTarget() OVERRIDE FINAL { deref(); } \
typedef int thisIsHereToForceASemiColonAfterThisEventTargetMacro
#define DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(baseClass) DEFINE_EVENT_TARGET_REFCOUNTING(baseClass)
#endif
// Use this macro if your EventTarget subclass is also a subclass of WTF::RefCounted.
// A ref-counted class that uses a different method of refcounting should use DEFINE_EVENT_TARGET_REFCOUNTING directly.
// Both of these macros are meant to be placed just before the "public:" section of the class declaration.
#define REFCOUNTED_EVENT_TARGET(className) DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<className>)
#endif // EventTarget_h
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