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#pragma once
22
23#include <wtf/RefCounted.h>
24
25namespace JSC {
26class JSObject;
27class SlotVisitor;
28}
29
30namespace WebCore {
31
32class ScriptExecutionContext;
33class Event;
34class EventTarget;
35
36class EventListener : public RefCounted<EventListener> {
37public:
38 enum Type {
39 JSEventListenerType,
40 ImageEventListenerType,
41 ObjCEventListenerType,
42 CPPEventListenerType,
43 ConditionEventListenerType,
44 GObjectEventListenerType,
45 NativeEventListenerType,
46 SVGTRefTargetEventListenerType,
47 };
48
49 virtual ~EventListener() = default;
50 virtual bool operator==(const EventListener&) const = 0;
51 virtual void handleEvent(ScriptExecutionContext&, Event&) = 0;
52 virtual bool wasCreatedFromMarkup() const { return false; }
53
54 virtual void visitJSFunction(JSC::SlotVisitor&) { }
55
56 virtual bool isAttribute() const { return false; }
57 Type type() const { return m_type; }
58
59#if !ASSERT_DISABLED
60 virtual void checkValidityForEventTarget(EventTarget&) { }
61#endif
62
63protected:
64 explicit EventListener(Type type)
65 : m_type(type)
66 {
67 }
68
69private:
70 Type m_type;
71};
72
73} // namespace WebCore
74