1/*
2 * Copyright (C) 2006, 2008, 2009 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library 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 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21#ifndef EventListener_h
22#define EventListener_h
23
24#include <wtf/RefCounted.h>
25
26namespace JSC {
27    class JSObject;
28    class SlotVisitor;
29}
30
31namespace WebCore {
32
33    class ScriptExecutionContext;
34    class Event;
35
36    class EventListener : public RefCounted<EventListener> {
37    public:
38        enum Type {
39            JSEventListenerType,
40            ImageEventListenerType,
41            ObjCEventListenerType,
42            CPPEventListenerType,
43            ConditionEventListenerType,
44            GObjectEventListenerType,
45            NativeEventListenerType,
46            SVGTRefTargetEventListenerType,
47            MediaControlsAppleEventListenerType
48        };
49
50        virtual ~EventListener() { }
51        virtual bool operator==(const EventListener&) = 0;
52        virtual void handleEvent(ScriptExecutionContext*, Event*) = 0;
53        virtual bool wasCreatedFromMarkup() const { return false; }
54
55        virtual void visitJSFunction(JSC::SlotVisitor&) { }
56
57        bool isAttribute() const { return virtualisAttribute(); }
58        Type type() const { return m_type; }
59
60    protected:
61        explicit EventListener(Type type)
62            : m_type(type)
63        {
64        }
65
66    private:
67        virtual bool virtualisAttribute() const { return false; }
68
69        Type m_type;
70    };
71
72}
73
74#endif
75