third_party/WebKit/Source/modules/filesystem/FileWriterBase.h

   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 FileWriterBase_h
  32 #define FileWriterBase_h
  33
  34 #include "platform/heap/Handle.h"
  35 #include "wtf/OwnPtr.h"
  36 #include "wtf/PassOwnPtr.h"
  37
  38 namespace blink {
  39
  40 class WebFileWriter;
  41
  42 class FileWriterBase : public RefCountedGarbageCollectedWillBeNoBase<FileWriterBase>, public WillBeGarbageCollectedMixin {
  43 public:
  44     virtual ~FileWriterBase();
  45     void initialize(PassOwnPtr<WebFileWriter>, long long length);
  46
  47     long long position() const
  48     {
  49         return m_position;
  50     }
  51     long long length() const
  52     {
  53         return m_length;
  54     }
  55
  56     DEFINE_INLINE_VIRTUAL_TRACE() { }
  57
  58 protected:
  59     FileWriterBase();
  60
  61     WebFileWriter* writer()
  62     {
  63         return m_writer.get();
  64     }
  65
  66     void setPosition(long long position)
  67     {
  68         m_position = position;
  69     }
  70
  71     void setLength(long long length)
  72     {
  73         m_length = length;
  74     }
  75
  76     void seekInternal(long long position);
  77
  78 private:
  79     OwnPtr<WebFileWriter> m_writer;
  80     long long m_position;
  81     long long m_length;
  82 };
  83
  84 } // namespace blink
  85
  86 #endif // FileWriterBase_h