chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.cc

   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.
   4
   5 #include "chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.h"
   6 #include "chrome/browser/media_galleries/fileapi/device_media_async_file_util.h"
   7 #include "storage/browser/fileapi/file_stream_reader.h"
   8 #include "storage/browser/fileapi/file_stream_writer.h"
   9 #include "storage/browser/fileapi/file_system_url.h"
  10
  11 namespace chromeos {
  12
  13 MTPFileSystemBackendDelegate::MTPFileSystemBackendDelegate(
  14     const base::FilePath& storage_partition_path)
  15     : device_media_async_file_util_(
  16           DeviceMediaAsyncFileUtil::Create(storage_partition_path,
  17                                            NO_MEDIA_FILE_VALIDATION)),
  18       mtp_watcher_manager_(
  19           new MTPWatcherManager(device_media_async_file_util_.get())) {
  20 }
  21
  22 MTPFileSystemBackendDelegate::~MTPFileSystemBackendDelegate() {
  23 }
  24
  25 storage::AsyncFileUtil* MTPFileSystemBackendDelegate::GetAsyncFileUtil(
  26     storage::FileSystemType type) {
  27   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, type);
  28
  29   return device_media_async_file_util_.get();
  30 }
  31
  32 scoped_ptr<storage::FileStreamReader>
  33 MTPFileSystemBackendDelegate::CreateFileStreamReader(
  34     const storage::FileSystemURL& url,
  35     int64 offset,
  36     int64 max_bytes_to_read,
  37     const base::Time& expected_modification_time,
  38     storage::FileSystemContext* context) {
  39   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
  40
  41   return device_media_async_file_util_->GetFileStreamReader(
  42       url, offset, expected_modification_time, context);
  43 }
  44
  45 scoped_ptr<storage::FileStreamWriter>
  46 MTPFileSystemBackendDelegate::CreateFileStreamWriter(
  47     const storage::FileSystemURL& url,
  48     int64 offset,
  49     storage::FileSystemContext* context) {
  50   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
  51
  52   // TODO(kinaba): support writing.
  53   return scoped_ptr<storage::FileStreamWriter>();
  54 }
  55
  56 storage::WatcherManager* MTPFileSystemBackendDelegate::GetWatcherManager(
  57     storage::FileSystemType type) {
  58   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, type);
  59   return mtp_watcher_manager_.get();
  60 }
  61
  62 void MTPFileSystemBackendDelegate::GetRedirectURLForContents(
  63     const storage::FileSystemURL& url,
  64     const storage::URLCallback& callback) {
  65   DCHECK_EQ(storage::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
  66
  67   callback.Run(GURL());
  68 }
  69
  70 }  // namespace chromeos