third_party/WebKit/Source/modules/filesystem/FileWriterSync.cpp

   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 #include "modules/filesystem/FileWriterSync.h"
  34
  35 #include "bindings/core/v8/ExceptionState.h"
  36 #include "core/dom/ExceptionCode.h"
  37 #include "core/fileapi/Blob.h"
  38 #include "public/platform/WebFileWriter.h"
  39 #include "public/platform/WebURL.h"
  40
  41 namespace blink {
  42
  43 void FileWriterSync::write(Blob* data, ExceptionState& exceptionState)
  44 {
  45     ASSERT(writer());
  46     ASSERT(m_complete);
  47     if (!data) {
  48         exceptionState.throwDOMException(TypeMismatchError, FileError::typeMismatchErrorMessage);
  49         return;
  50     }
  51
  52     prepareForWrite();
  53     writer()->write(position(), data->uuid());
  54     ASSERT(m_complete);
  55     if (m_error) {
  56         FileError::throwDOMException(exceptionState, m_error);
  57         return;
  58     }
  59     setPosition(position() + data->size());
  60     if (position() > length())
  61         setLength(position());
  62 }
  63
  64 void FileWriterSync::seek(long long position, ExceptionState& exceptionState)
  65 {
  66     ASSERT(writer());
  67     ASSERT(m_complete);
  68     seekInternal(position);
  69 }
  70
  71 void FileWriterSync::truncate(long long offset, ExceptionState& exceptionState)
  72 {
  73     ASSERT(writer());
  74     ASSERT(m_complete);
  75     if (offset < 0) {
  76         exceptionState.throwDOMException(InvalidStateError, FileError::invalidStateErrorMessage);
  77         return;
  78     }
  79     prepareForWrite();
  80     writer()->truncate(offset);
  81     ASSERT(m_complete);
  82     if (m_error) {
  83         FileError::throwDOMException(exceptionState, m_error);
  84         return;
  85     }
  86     if (offset < position())
  87         setPosition(offset);
  88     setLength(offset);
  89 }
  90
  91 void FileWriterSync::didWrite(long long bytes, bool complete)
  92 {
  93     ASSERT(m_error == FileError::OK);
  94     ASSERT(!m_complete);
  95 #if ENABLE(ASSERT)
  96     m_complete = complete;
  97 #else
  98     ASSERT_UNUSED(complete, complete);
  99 #endif
 100 }
 101
 102 void FileWriterSync::didTruncate()
 103 {
 104     ASSERT(m_error == FileError::OK);
 105     ASSERT(!m_complete);
 106 #if ENABLE(ASSERT)
 107     m_complete = true;
 108 #endif
 109 }
 110
 111 void FileWriterSync::didFail(WebFileError error)
 112 {
 113     ASSERT(m_error == FileError::OK);
 114     m_error = static_cast<FileError::ErrorCode>(error);
 115     ASSERT(!m_complete);
 116 #if ENABLE(ASSERT)
 117     m_complete = true;
 118 #endif
 119 }
 120
 121 FileWriterSync::FileWriterSync()
 122     : m_error(FileError::OK)
 123 #if ENABLE(ASSERT)
 124     , m_complete(true)
 125 #endif
 126 {
 127 }
 128
 129 void FileWriterSync::prepareForWrite()
 130 {
 131     ASSERT(m_complete);
 132     m_error = FileError::OK;
 133 #if ENABLE(ASSERT)
 134     m_complete = false;
 135 #endif
 136 }
 137
 138 FileWriterSync::~FileWriterSync()
 139 {
 140 }
 141
 142 DEFINE_TRACE(FileWriterSync)
 143 {
 144     FileWriterBase::trace(visitor);
 145 }
 146
 147 } // namespace blink