1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* 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 "EventListenerMap.h"
#include "EventNames.h"
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/text/AtomicStringHash.h>
namespace WebCore {
class AudioNode;
class AudioContext;
class AudioTrackList;
class DedicatedWorkerGlobalScope;
class DOMApplicationCache;
class DOMWindow;
class Event;
class EventListener;
class EventSource;
class FileReader;
class FileWriter;
class IDBDatabase;
class IDBRequest;
class IDBTransaction;
class ScriptProcessorNode;
class LocalMediaStream;
class MediaController;
class MediaSource;
class MediaStream;
class MessagePort;
class Node;
class Notification;
class SVGElementInstance;
class ScriptExecutionContext;
class SharedWorker;
class SharedWorkerGlobalScope;
class SourceBufferList;
class TextTrack;
class TextTrackCue;
class VideoTrackList;
class WebSocket;
class WebKitNamedFlow;
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;
struct EventTargetData {
WTF_MAKE_NONCOPYABLE(EventTargetData); WTF_MAKE_FAST_ALLOCATED;
public:
EventTargetData();
~EventTargetData();
EventListenerMap eventListenerMap;
OwnPtr<FiringEventIteratorVector> firingEventIterators;
};
class EventTarget {
public:
void ref() { refEventTarget(); }
void deref() { derefEventTarget(); }
virtual const AtomicString& interfaceName() const = 0;
virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
virtual Node* toNode();
virtual DOMWindow* toDOMWindow();
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
virtual void uncaughtExceptionInEventHandler();
// 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);
bool hasCapturingEventListeners(const AtomicString& eventType);
const EventListenerVector& getEventListeners(const AtomicString& eventType);
bool fireEventListeners(Event*);
bool isFiringEventListeners();
void visitJSEventListeners(JSC::SlotVisitor&);
void invalidateJSEventListeners(JSC::JSObject*);
protected:
virtual ~EventTarget();
virtual EventTargetData* eventTargetData() = 0;
virtual EventTargetData* ensureEventTargetData() = 0;
private:
virtual void refEventTarget() = 0;
virtual void derefEventTarget() = 0;
void fireEventListeners(Event*, EventTargetData*, EventListenerVector&);
friend class EventListenerIterator;
};
// 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(eventNames().attribute##Event); } \
void setOn##attribute(PassRefPtr<EventListener> listener) { setAttributeEventListener(eventNames().attribute##Event, listener); } \
#define DECLARE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(attribute) \
virtual EventListener* on##attribute(); \
virtual void setOn##attribute(PassRefPtr<EventListener> listener); \
#define DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(type, attribute) \
EventListener* type::on##attribute() { return getAttributeEventListener(eventNames().attribute##Event); } \
void type::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 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(eventNames().attribute##Event) : 0; } \
void type::setOn##attribute(PassRefPtr<EventListener> listener) { if (recipient) recipient->setAttributeEventListener(eventNames().attribute##Event, listener); }
inline void EventTarget::visitJSEventListeners(JSC::SlotVisitor& visitor)
{
EventListenerIterator iterator(this);
while (EventListener* listener = iterator.nextListener())
listener->visitJSFunction(visitor);
}
inline bool EventTarget::isFiringEventListeners()
{
EventTargetData* d = eventTargetData();
if (!d)
return false;
return d->firingEventIterators && !d->firingEventIterators->isEmpty();
}
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);
}
inline bool EventTarget::hasCapturingEventListeners(const AtomicString& eventType)
{
EventTargetData* d = eventTargetData();
if (!d)
return false;
return d->eventListenerMap.containsCapturing(eventType);
}
} // namespace WebCore
#endif // EventTarget_h
|
