1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_WEBKIT_FILE_STREAM_WRITER_IMPL_H_
6 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_WEBKIT_FILE_STREAM_WRITER_IMPL_H_
8 #include "base/basictypes.h"
9 #include "base/callback.h"
10 #include "base/files/file.h"
11 #include "base/files/file_path.h"
12 #include "base/memory/scoped_ptr.h"
13 #include "base/memory/weak_ptr.h"
14 #include "storage/browser/fileapi/file_stream_writer.h"
26 class FileSystemInterface;
30 // The implementation of storage::FileStreamWriter for the Drive File System.
31 class WebkitFileStreamWriterImpl : public storage::FileStreamWriter {
33 // Callback to return the FileSystemInterface instance. This is an
34 // injecting point for testing.
35 // Note that the callback will be copied between threads (IO and UI), and
36 // will be called on UI thread.
37 typedef base::Callback<FileSystemInterface*()> FileSystemGetter;
39 // Creates a writer for a file at |file_path| on FileSystem returned by
40 // |file_system_getter| that starts writing from |offset|.
41 // When invalid parameters are set, the first call to Write() method fails.
42 // Uses |file_task_runner| for local file operations.
43 WebkitFileStreamWriterImpl(const FileSystemGetter& file_system_getter,
44 base::TaskRunner* file_task_runner,
45 const base::FilePath& file_path,
47 virtual ~WebkitFileStreamWriterImpl();
49 // FileWriter override.
50 virtual int Write(net::IOBuffer* buf, int buf_len,
51 const net::CompletionCallback& callback) override;
52 virtual int Cancel(const net::CompletionCallback& callback) override;
53 virtual int Flush(const net::CompletionCallback& callback) override;
56 // Part of Write(). Called after CreateWritableSnapshotFile is completed.
57 void WriteAfterCreateWritableSnapshotFile(
60 base::File::Error open_result,
61 const base::FilePath& local_path,
62 const base::Closure& close_callback_on_ui_thread);
64 FileSystemGetter file_system_getter_;
65 scoped_refptr<base::TaskRunner> file_task_runner_;
66 const base::FilePath file_path_;
69 scoped_ptr<storage::FileStreamWriter> local_file_writer_;
70 base::Closure close_callback_on_ui_thread_;
71 net::CompletionCallback pending_write_callback_;
72 net::CompletionCallback pending_cancel_callback_;
74 // Note: This should remain the last member so it'll be destroyed and
75 // invalidate the weak pointers before any other members are destroyed.
76 base::WeakPtrFactory<WebkitFileStreamWriterImpl> weak_ptr_factory_;
78 DISALLOW_COPY_AND_ASSIGN(WebkitFileStreamWriterImpl);
81 } // namespace internal
84 #endif // CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_WEBKIT_FILE_STREAM_WRITER_IMPL_H_