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#include "config.h" 32 33#if ENABLE(FILE_SYSTEM) 34 35#include "FileWriter.h" 36 37#include "AsyncFileWriter.h" 38#include "Blob.h" 39#include "ExceptionCode.h" 40#include "FileError.h" 41#include "FileException.h" 42#include "ProgressEvent.h" 43 44namespace WebCore { 45 46FileWriter::FileWriter(ScriptExecutionContext* context) 47 : ActiveDOMObject(context, this) 48 , m_readyState(INIT) 49 , m_startedWriting(false) 50 , m_bytesWritten(0) 51 , m_bytesToWrite(0) 52 , m_truncateLength(-1) 53{ 54} 55 56FileWriter::~FileWriter() 57{ 58 if (m_readyState == WRITING) 59 stop(); 60} 61 62bool FileWriter::hasPendingActivity() const 63{ 64 return m_readyState == WRITING || ActiveDOMObject::hasPendingActivity(); 65} 66 67bool FileWriter::canSuspend() const 68{ 69 // FIXME: It is not currently possible to suspend a FileWriter, so pages with FileWriter can not go into page cache. 70 return false; 71} 72 73void FileWriter::stop() 74{ 75 if (writer() && m_readyState == WRITING) 76 writer()->abort(); 77 m_blobBeingWritten.clear(); 78 m_readyState = DONE; 79} 80 81void FileWriter::write(Blob* data, ExceptionCode& ec) 82{ 83 ASSERT(writer()); 84 if (m_readyState == WRITING) { 85 setError(FileError::INVALID_STATE_ERR, ec); 86 return; 87 } 88 if (!data) { 89 setError(FileError::TYPE_MISMATCH_ERR, ec); 90 return; 91 } 92 93 m_blobBeingWritten = data; 94 m_readyState = WRITING; 95 m_startedWriting = false; 96 m_bytesWritten = 0; 97 m_bytesToWrite = data->size(); 98 writer()->write(position(), data); 99} 100 101void FileWriter::seek(long long position, ExceptionCode& ec) 102{ 103 ASSERT(writer()); 104 if (m_readyState == WRITING) { 105 setError(FileError::INVALID_STATE_ERR, ec); 106 return; 107 } 108 109 m_bytesWritten = 0; 110 m_bytesToWrite = 0; 111 seekInternal(position); 112} 113 114void FileWriter::truncate(long long position, ExceptionCode& ec) 115{ 116 ASSERT(writer()); 117 if (m_readyState == WRITING || position < 0) { 118 setError(FileError::INVALID_STATE_ERR, ec); 119 return; 120 } 121 m_readyState = WRITING; 122 m_bytesWritten = 0; 123 m_bytesToWrite = 0; 124 m_truncateLength = position; 125 writer()->truncate(position); 126} 127 128void FileWriter::abort(ExceptionCode& ec) 129{ 130 ASSERT(writer()); 131 if (m_readyState != WRITING) { 132 setError(FileError::INVALID_STATE_ERR, ec); 133 return; 134 } 135 136 m_error = FileError::create(FileError::ABORT_ERR); 137 writer()->abort(); 138} 139 140void FileWriter::didWrite(long long bytes, bool complete) 141{ 142 ASSERT(bytes + m_bytesWritten > 0); 143 ASSERT(bytes + m_bytesWritten <= m_bytesToWrite); 144 if (!m_startedWriting) { 145 fireEvent(eventNames().writestartEvent); 146 m_startedWriting = true; 147 } 148 m_bytesWritten += bytes; 149 ASSERT((m_bytesWritten == m_bytesToWrite) || !complete); 150 setPosition(position() + bytes); 151 if (position() > length()) 152 setLength(position()); 153 fireEvent(eventNames().progressEvent); 154 if (complete) { 155 m_blobBeingWritten.clear(); 156 fireEvent(eventNames().writeEvent); 157 m_readyState = DONE; 158 fireEvent(eventNames().writeendEvent); 159 } 160} 161 162void FileWriter::didTruncate() 163{ 164 ASSERT(m_truncateLength >= 0); 165 fireEvent(eventNames().writestartEvent); 166 setLength(m_truncateLength); 167 if (position() > length()) 168 setPosition(length()); 169 m_truncateLength = -1; 170 fireEvent(eventNames().writeEvent); 171 m_readyState = DONE; 172 fireEvent(eventNames().writeendEvent); 173} 174 175void FileWriter::didFail(FileError::ErrorCode code) 176{ 177 m_error = FileError::create(code); 178 fireEvent(eventNames().errorEvent); 179 if (FileError::ABORT_ERR == code) 180 fireEvent(eventNames().abortEvent); 181 fireEvent(eventNames().errorEvent); 182 m_blobBeingWritten.clear(); 183 m_readyState = DONE; 184 fireEvent(eventNames().writeendEvent); 185} 186 187void FileWriter::fireEvent(const AtomicString& type) 188{ 189 dispatchEvent(ProgressEvent::create(type, true, m_bytesWritten, m_bytesToWrite)); 190} 191 192void FileWriter::setError(FileError::ErrorCode errorCode, ExceptionCode& ec) 193{ 194 ec = FileException::ErrorCodeToExceptionCode(errorCode); 195 m_error = FileError::create(errorCode); 196} 197 198} // namespace WebCore 199 200#endif // ENABLE(FILE_SYSTEM) 201