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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
commit648161bb0edfc3d43db63caed5cc5213bc6cb78f (patch)
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parenta65af38181ac7d34544586bdb5cd004de93897ad (diff)
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-/*
- * 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 <wtf/Forward.h>
-
-namespace WebCore {
-
- class AtomicString;
- class DOMApplicationCache;
- class Event;
- class EventListener;
- class EventTargetNode;
- class MessagePort;
- class RegisteredEventListener;
- class ScriptExecutionContext;
- class SVGElementInstance;
- class XMLHttpRequest;
- class XMLHttpRequestUpload;
-
- typedef int ExceptionCode;
-
- template<typename T> class DeprecatedValueList;
- typedef DeprecatedValueList<RefPtr<RegisteredEventListener> > RegisteredEventListenerList;
-
- class EventTarget {
- public:
- virtual MessagePort* toMessagePort();
- virtual EventTargetNode* toNode();
- virtual XMLHttpRequest* toXMLHttpRequest();
- virtual XMLHttpRequestUpload* toXMLHttpRequestUpload();
-#if ENABLE(OFFLINE_WEB_APPLICATIONS)
- virtual DOMApplicationCache* toDOMApplicationCache();
-#endif
-#if ENABLE(SVG)
- virtual SVGElementInstance* toSVGElementInstance();
-#endif
-
- virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
-
- virtual void addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture) = 0;
- virtual void removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture) = 0;
- virtual bool dispatchEvent(PassRefPtr<Event>, ExceptionCode&) = 0;
-
- void ref() { refEventTarget(); }
- void deref() { derefEventTarget(); }
-
- // Handlers to do/undo actions on the target node before an event is dispatched to it and after the event
- // has been dispatched. The data pointer is handed back by the preDispatch and passed to postDispatch.
- virtual void* preDispatchEventHandler(Event*) { return 0; }
- virtual void postDispatchEventHandler(Event*, void* dataFromPreDispatch) { }
-
- protected:
- virtual ~EventTarget();
-
- private:
- virtual void refEventTarget() = 0;
- virtual void derefEventTarget() = 0;
- };
-
-#ifndef NDEBUG
-void forbidEventDispatch();
-void allowEventDispatch();
-bool eventDispatchForbidden();
-#else
-inline void forbidEventDispatch() { }
-inline void allowEventDispatch() { }
-#endif // NDEBUG
-
-}
-#endif