1/*
2 *  Copyright (C) 2010, 2011 Igalia S.L.
3 *
4 *  This library is free software; you can redistribute it and/or
5 *  modify it under the terms of the GNU Lesser General Public
6 *  License as published by the Free Software Foundation; either
7 *  version 2 of the License, or (at your option) any later version.
8 *
9 *  This library is distributed in the hope that it will be useful,
10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 *  Lesser General Public License for more details.
13 *
14 *  You should have received a copy of the GNU Lesser General Public
15 *  License along with this library; if not, write to the Free Software
16 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18
19#ifndef GObjectEventListener_h
20#define GObjectEventListener_h
21
22#include "EventListener.h"
23#include "EventTarget.h"
24
25#include <wtf/RefPtr.h>
26#include <wtf/text/CString.h>
27
28typedef struct _GObject GObject;
29typedef void (*GCallback) (void);
30
31namespace WebCore {
32
33class GObjectEventListener : public EventListener {
34public:
35
36    static bool addEventListener(GObject* object, EventTarget* target, const char* domEventName, GCallback handler, bool useCapture, void* userData)
37    {
38        RefPtr<GObjectEventListener> listener(adoptRef(new GObjectEventListener(object, target, domEventName, handler, useCapture, userData)));
39        return target->addEventListener(domEventName, listener.release(), useCapture);
40    }
41
42    static bool removeEventListener(GObject* object, EventTarget* target, const char* domEventName, GCallback handler, bool useCapture)
43    {
44        GObjectEventListener key(object, target, domEventName, handler, useCapture, 0);
45        return target->removeEventListener(domEventName, &key, useCapture);
46    }
47
48    static void gobjectDestroyedCallback(GObjectEventListener* listener, GObject*)
49    {
50        listener->gobjectDestroyed();
51    }
52
53    static const GObjectEventListener* cast(const EventListener* listener)
54    {
55        return listener->type() == GObjectEventListenerType
56            ? static_cast<const GObjectEventListener*>(listener)
57            : 0;
58    }
59
60    virtual bool operator==(const EventListener& other);
61
62private:
63    GObjectEventListener(GObject*, EventTarget*, const char* domEventName, GCallback handler, bool capture, void* userData);
64    ~GObjectEventListener();
65    void gobjectDestroyed();
66
67    virtual void handleEvent(ScriptExecutionContext*, Event*);
68
69    GObject* m_object;
70
71    // We do not need to keep a reference to the m_coreTarget, because
72    // we only use it when the GObject and thus the m_coreTarget object is alive.
73    EventTarget* m_coreTarget;
74    CString m_domEventName;
75    GCallback m_handler;
76    bool m_capture;
77    void* m_userData;
78};
79} // namespace WebCore
80
81#endif
82