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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 are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #ifndef FileWriter_h
32 #define FileWriter_h
33 
34 #if ENABLE(FILE_SYSTEM)
35 
36 #include "ActiveDOMObject.h"
37 #include "EventTarget.h"
38 #include "FileWriterBase.h"
39 #include <wtf/PassRefPtr.h>
40 #include <wtf/RefPtr.h>
41 
42 namespace WebCore {
43 
44 class ScriptExecutionContext;
45 
46 class FileWriter : public FileWriterBase, public ActiveDOMObject, public EventTarget, public AsyncFileWriterClient {
47 public:
create(ScriptExecutionContext * context)48     static PassRefPtr<FileWriter> create(ScriptExecutionContext* context)
49     {
50         return adoptRef(new FileWriter(context));
51     }
52 
53     enum ReadyState {
54         INIT = 0,
55         WRITING = 1,
56         DONE = 2
57     };
58 
59     void write(Blob*, ExceptionCode&);
60     void seek(long long position, ExceptionCode&);
61     void truncate(long long length, ExceptionCode&);
62     void abort(ExceptionCode&);
readyState()63     ReadyState readyState() const { return m_readyState; }
error()64     FileError* error() const { return m_error.get(); }
65 
66     // AsyncFileWriterClient
67     void didWrite(long long bytes, bool complete);
68     void didTruncate();
69     void didFail(FileError::ErrorCode);
70 
71     // ActiveDOMObject
72     virtual bool canSuspend() const;
73     virtual bool hasPendingActivity() const;
74     virtual void stop();
75 
76     // EventTarget
toFileWriter()77     virtual FileWriter* toFileWriter() { return this; }
scriptExecutionContext()78     virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); }
79 
80     using RefCounted<FileWriterBase>::ref;
81     using RefCounted<FileWriterBase>::deref;
82 
83     DEFINE_ATTRIBUTE_EVENT_LISTENER(writestart);
84     DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);
85     DEFINE_ATTRIBUTE_EVENT_LISTENER(write);
86     DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
87     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
88     DEFINE_ATTRIBUTE_EVENT_LISTENER(writeend);
89 
90 private:
91     FileWriter(ScriptExecutionContext*);
92 
93     virtual ~FileWriter();
94 
95     // EventTarget
refEventTarget()96     virtual void refEventTarget() { ref(); }
derefEventTarget()97     virtual void derefEventTarget() { deref(); }
eventTargetData()98     virtual EventTargetData* eventTargetData() { return &m_eventTargetData; }
ensureEventTargetData()99     virtual EventTargetData* ensureEventTargetData() { return &m_eventTargetData; }
100 
101     void fireEvent(const AtomicString& type);
102 
103     void setError(FileError::ErrorCode, ExceptionCode&);
104 
105     RefPtr<FileError> m_error;
106     EventTargetData m_eventTargetData;
107     ReadyState m_readyState;
108     bool m_startedWriting;
109     long long m_bytesWritten;
110     long long m_bytesToWrite;
111     long long m_truncateLength;
112     RefPtr<Blob> m_blobBeingWritten;
113 };
114 
115 } // namespace WebCore
116 
117 #endif // ENABLE(FILE_SYSTEM)
118 
119 #endif // FileWriter_h
120