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