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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 #ifndef IDBRequest_h
     29 #define IDBRequest_h
     30 
     31 #include "ActiveDOMObject.h"
     32 #include "EventTarget.h"
     33 #include <wtf/PassRefPtr.h>
     34 #include <wtf/RefCounted.h>
     35 #include <wtf/RefPtr.h>
     36 
     37 #if ENABLE(INDEXED_DATABASE)
     38 
     39 namespace WebCore {
     40 
     41 class IDBDatabaseError;
     42 class SerializedScriptValue;
     43 
     44 class IDBRequest : public RefCounted<IDBRequest>, public ActiveDOMObject, public EventTarget {
     45 public:
     46     static PassRefPtr<IDBRequest> create(ScriptExecutionContext* context)
     47     {
     48         return adoptRef(new IDBRequest(context));
     49     }
     50     ~IDBRequest();
     51 
     52     void abort();
     53     unsigned short readyState() const { return m_readyState; }
     54     IDBDatabaseError* error() const { return m_error.get(); }
     55     SerializedScriptValue* result() const { return m_result.get(); }
     56 
     57     DEFINE_ATTRIBUTE_EVENT_LISTENER(success);
     58     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     59 
     60     using RefCounted<IDBRequest>::ref;
     61     using RefCounted<IDBRequest>::deref;
     62 
     63     // EventTarget interface
     64     virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); }
     65     virtual IDBRequest* toIDBRequest() { return this; }
     66 
     67 private:
     68     explicit IDBRequest(ScriptExecutionContext* context);
     69 
     70     // EventTarget interface
     71     virtual void refEventTarget() { ref(); }
     72     virtual void derefEventTarget() { deref(); }
     73     virtual EventTargetData* eventTargetData();
     74     virtual EventTargetData* ensureEventTargetData();
     75 
     76     unsigned short m_readyState;
     77     RefPtr<IDBDatabaseError> m_error;
     78     RefPtr<SerializedScriptValue> m_result;
     79 
     80     EventTargetData m_eventTargetData;
     81 };
     82 
     83 } // namespace WebCore
     84 
     85 #endif
     86 
     87 #endif // IDBRequest_h
     88 
     89