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 "ScriptExecutionContext.h" 40 #include <wtf/PassRefPtr.h> 41 #include <wtf/RefPtr.h> 42 43 namespace WebCore { 44 45 class ScriptExecutionContext; 46 47 class FileWriter : public FileWriterBase, public ActiveDOMObject, public EventTarget, public AsyncFileWriterClient { 48 public: create(ScriptExecutionContext * context)49 static PassRefPtr<FileWriter> create(ScriptExecutionContext* context) 50 { 51 return adoptRef(new FileWriter(context)); 52 } 53 54 enum ReadyState { 55 INIT = 0, 56 WRITING = 1, 57 DONE = 2 58 }; 59 60 void write(Blob*, ExceptionCode&); 61 void seek(long long position, ExceptionCode&); 62 void truncate(long long length, ExceptionCode&); 63 void abort(ExceptionCode&); readyState()64 ReadyState readyState() const { return m_readyState; } error()65 FileError* error() const { return m_error.get(); } 66 67 // AsyncFileWriterClient 68 void didWrite(long long bytes, bool complete); 69 void didTruncate(); 70 void didFail(FileError::ErrorCode); 71 72 // ActiveDOMObject 73 virtual bool canSuspend() const; 74 virtual bool hasPendingActivity() const; 75 virtual void stop(); 76 77 // EventTarget toFileWriter()78 virtual FileWriter* toFileWriter() { return this; } scriptExecutionContext()79 virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); } 80 81 using RefCounted<FileWriterBase>::ref; 82 using RefCounted<FileWriterBase>::deref; 83 84 DEFINE_ATTRIBUTE_EVENT_LISTENER(writestart); 85 DEFINE_ATTRIBUTE_EVENT_LISTENER(progress); 86 DEFINE_ATTRIBUTE_EVENT_LISTENER(write); 87 DEFINE_ATTRIBUTE_EVENT_LISTENER(abort); 88 DEFINE_ATTRIBUTE_EVENT_LISTENER(error); 89 DEFINE_ATTRIBUTE_EVENT_LISTENER(writeend); 90 91 private: 92 FileWriter(ScriptExecutionContext*); 93 94 virtual ~FileWriter(); 95 96 // EventTarget refEventTarget()97 virtual void refEventTarget() { ref(); } derefEventTarget()98 virtual void derefEventTarget() { deref(); } eventTargetData()99 virtual EventTargetData* eventTargetData() { return &m_eventTargetData; } ensureEventTargetData()100 virtual EventTargetData* ensureEventTargetData() { return &m_eventTargetData; } 101 102 void fireEvent(const AtomicString& type); 103 104 void setError(FileError::ErrorCode, ExceptionCode&); 105 106 void signalCompletion(FileError::ErrorCode); 107 108 class FileWriterCompletionEventTask : public ScriptExecutionContext::Task { 109 public: create(PassRefPtr<FileWriter> fileWriter,FileError::ErrorCode code)110 static PassOwnPtr<FileWriterCompletionEventTask> create(PassRefPtr<FileWriter> fileWriter, FileError::ErrorCode code) 111 { 112 return adoptPtr(new FileWriterCompletionEventTask(fileWriter, code)); 113 } 114 115 performTask(ScriptExecutionContext *)116 virtual void performTask(ScriptExecutionContext*) 117 { 118 m_fileWriter->signalCompletion(m_code); 119 } 120 private: FileWriterCompletionEventTask(PassRefPtr<FileWriter> fileWriter,FileError::ErrorCode code)121 FileWriterCompletionEventTask(PassRefPtr<FileWriter> fileWriter, FileError::ErrorCode code) 122 : m_fileWriter(fileWriter) 123 , m_code(code) 124 { 125 } 126 127 RefPtr<FileWriter> m_fileWriter; 128 FileError::ErrorCode m_code; 129 }; 130 131 RefPtr<FileError> m_error; 132 EventTargetData m_eventTargetData; 133 ReadyState m_readyState; 134 bool m_startedWriting; 135 long long m_bytesWritten; 136 long long m_bytesToWrite; 137 long long m_truncateLength; 138 RefPtr<Blob> m_blobBeingWritten; 139 }; 140 141 } // namespace WebCore 142 143 #endif // ENABLE(FILE_SYSTEM) 144 145 #endif // FileWriter_h 146