third_party/WebKit/public/platform/WebFileWriterClient.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 WebFileWriterClient_h
  32 #define WebFileWriterClient_h
  33
  34 #include "WebCommon.h"
  35 #include "WebFileError.h"
  36
  37 namespace blink {
  38
  39 class WebFileWriterClient {
  40 public:
  41     // Called for each chunk of a write, to indicate progress.
  42     // On the final chunk, when the write is finished, complete will be true.
  43     virtual void didWrite(long long bytes, bool complete) = 0;
  44
  45     // Called once when the truncate completes successfully.
  46     virtual void didTruncate() = 0;
  47
  48     // Called if the write or truncate fails, or if it is cancelled before the write or truncate completes. Completion of an operation will be signalled exactly once, either by didFail, didTruncate, or didWrite(..., true).
  49     virtual void didFail(WebFileError) = 0;
  50
  51 protected:
  52     virtual ~WebFileWriterClient() { }
  53 };
  54
  55 } // namespace blink
  56
  57 #endif