Move browser-specific FileAPI code from webkit/fileapi to webkit/browser/fileapi

webkit/fileapi/local_file_stream_writer.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WEBKIT_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
-#define WEBKIT_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
-
-#include <utility>
-
-#include "base/callback.h"
-#include "base/compiler_specific.h"
-#include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/platform_file.h"
-#include "webkit/fileapi/file_stream_writer.h"
-#include "webkit/storage/webkit_storage_export.h"
-
-namespace net {
-class FileStream;
-}
-
-namespace fileapi {
-
-// This class is a thin wrapper around net::FileStream for writing local files.
-class WEBKIT_STORAGE_EXPORT_PRIVATE LocalFileStreamWriter
-    : public FileStreamWriter {
- public:
-  // Create a writer for the existing file in the path |file_path| starting from
-  // |initial_offset|.
-  LocalFileStreamWriter(const base::FilePath& file_path, int64 initial_offset);
-  virtual ~LocalFileStreamWriter();
-
-  // FileStreamWriter overrides.
-  virtual int Write(net::IOBuffer* buf, int buf_len,
-                    const net::CompletionCallback& callback) OVERRIDE;
-  virtual int Cancel(const net::CompletionCallback& callback) OVERRIDE;
-  virtual int Flush(const net::CompletionCallback& callback) OVERRIDE;
-
- private:
-  // Opens |file_path_| and if it succeeds, proceeds to InitiateSeek().
-  // If failed, the error code is returned by calling |error_callback|.
-  int InitiateOpen(const net::CompletionCallback& error_callback,
-                   const base::Closure& main_operation);
-  void DidOpen(const net::CompletionCallback& error_callback,
-               const base::Closure& main_operation,
-               int result);
-
-  // Seeks to |initial_offset_| and proceeds to |main_operation| if it succeeds.
-  // If failed, the error code is returned by calling |error_callback|.
-  void InitiateSeek(const net::CompletionCallback& error_callback,
-                    const base::Closure& main_operation);
-  void DidSeek(const net::CompletionCallback& error_callback,
-               const base::Closure& main_operation,
-               int64 result);
-
-  // Passed as the |main_operation| of InitiateOpen() function.
-  void ReadyToWrite(net::IOBuffer* buf, int buf_len,
-                    const net::CompletionCallback& callback);
-
-  // Writes asynchronously to the file.
-  int InitiateWrite(net::IOBuffer* buf, int buf_len,
-                    const net::CompletionCallback& callback);
-  void DidWrite(const net::CompletionCallback& callback, int result);
-
-  // Flushes asynchronously to the file.
-  int InitiateFlush(const net::CompletionCallback& callback);
-  void DidFlush(const net::CompletionCallback& callback, int result);
-
-  // Stops the in-flight operation and calls |cancel_callback_| if it has been
-  // set by Cancel() for the current operation.
-  bool CancelIfRequested();
-
-  // Initialization parameters.
-  const base::FilePath file_path_;
-  const int64 initial_offset_;
-
-  // Current states of the operation.
-  bool has_pending_operation_;
-  scoped_ptr<net::FileStream> stream_impl_;
-  net::CompletionCallback cancel_callback_;
-
-  base::WeakPtrFactory<LocalFileStreamWriter> weak_factory_;
-  DISALLOW_COPY_AND_ASSIGN(LocalFileStreamWriter);
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_