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      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/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 WebCore {
     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 #ifndef NDEBUG
     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 #ifndef NDEBUG
    107     m_complete = true;
    108 #endif
    109 }
    110 
    111 void FileWriterSync::didFail(blink::WebFileError error)
    112 {
    113     ASSERT(m_error == FileError::OK);
    114     m_error = static_cast<FileError::ErrorCode>(error);
    115     ASSERT(!m_complete);
    116 #ifndef NDEBUG
    117     m_complete = true;
    118 #endif
    119 }
    120 
    121 FileWriterSync::FileWriterSync()
    122     : m_error(FileError::OK)
    123 #ifndef NDEBUG
    124     , m_complete(true)
    125 #endif
    126 {
    127     ScriptWrappable::init(this);
    128 }
    129 
    130 void FileWriterSync::prepareForWrite()
    131 {
    132     ASSERT(m_complete);
    133     m_error = FileError::OK;
    134 #ifndef NDEBUG
    135     m_complete = false;
    136 #endif
    137 }
    138 
    139 FileWriterSync::~FileWriterSync()
    140 {
    141 }
    142 
    143 
    144 } // namespace WebCore
    145