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 44 namespace WebCore { 45 46 FileWriter::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 56 FileWriter::~FileWriter() 57 { 58 if (m_readyState == WRITING) 59 stop(); 60 } 61 62 bool FileWriter::hasPendingActivity() const 63 { 64 return m_readyState == WRITING || ActiveDOMObject::hasPendingActivity(); 65 } 66 67 bool 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 73 void FileWriter::stop() 74 { 75 if (writer() && m_readyState == WRITING) 76 writer()->abort(); 77 m_blobBeingWritten.clear(); 78 m_readyState = DONE; 79 } 80 81 void 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 } 100 101 void 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 } 113 114 void 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 } 127 128 void 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 } 139 140 void 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 } 161 162 void 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 } 174 175 void 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 } 186 187 void FileWriter::fireEvent(const AtomicString& type) 188 { 189 dispatchEvent(ProgressEvent::create(type, true, m_bytesWritten, m_bytesToWrite)); 190 } 191 192 void 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
