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