storage/browser/fileapi/isolated_file_system_backend.h

   1 // Copyright (c) 2012 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 #ifndef STORAGE_BROWSER_FILEAPI_ISOLATED_FILE_SYSTEM_BACKEND_H_
   6 #define STORAGE_BROWSER_FILEAPI_ISOLATED_FILE_SYSTEM_BACKEND_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "storage/browser/fileapi/file_system_backend.h"
  10 #include "storage/browser/fileapi/task_runner_bound_observer_list.h"
  11
  12 namespace storage {
  13
  14 class AsyncFileUtilAdapter;
  15
  16 class IsolatedFileSystemBackend : public FileSystemBackend {
  17  public:
  18   IsolatedFileSystemBackend(bool use_for_type_native_local,
  19                             bool use_for_type_platform_app);
  20   ~IsolatedFileSystemBackend() override;
  21
  22   // FileSystemBackend implementation.
  23   bool CanHandleType(FileSystemType type) const override;
  24   void Initialize(FileSystemContext* context) override;
  25   void ResolveURL(const FileSystemURL& url,
  26                   OpenFileSystemMode mode,
  27                   const OpenFileSystemCallback& callback) override;
  28   AsyncFileUtil* GetAsyncFileUtil(FileSystemType type) override;
  29   WatcherManager* GetWatcherManager(FileSystemType type) override;
  30   CopyOrMoveFileValidatorFactory* GetCopyOrMoveFileValidatorFactory(
  31       FileSystemType type,
  32       base::File::Error* error_code) override;
  33   FileSystemOperation* CreateFileSystemOperation(
  34       const FileSystemURL& url,
  35       FileSystemContext* context,
  36       base::File::Error* error_code) const override;
  37   bool SupportsStreaming(const FileSystemURL& url) const override;
  38   bool HasInplaceCopyImplementation(
  39       storage::FileSystemType type) const override;
  40   scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
  41       const FileSystemURL& url,
  42       int64 offset,
  43       int64 max_bytes_to_read,
  44       const base::Time& expected_modification_time,
  45       FileSystemContext* context) const override;
  46   scoped_ptr<FileStreamWriter> CreateFileStreamWriter(
  47       const FileSystemURL& url,
  48       int64 offset,
  49       FileSystemContext* context) const override;
  50   FileSystemQuotaUtil* GetQuotaUtil() override;
  51   const UpdateObserverList* GetUpdateObservers(
  52       FileSystemType type) const override;
  53   const ChangeObserverList* GetChangeObservers(
  54       FileSystemType type) const override;
  55   const AccessObserverList* GetAccessObservers(
  56       FileSystemType type) const override;
  57
  58  private:
  59   // Whether this object should handle native local filesystem types. Some
  60   // platforms (e.g. Chrome OS) may provide a different FileSystemBackend to
  61   // handle those types.
  62   const bool use_for_type_native_local_;
  63
  64   // As above but for platform webapps.
  65   const bool use_for_type_platform_app_;
  66
  67   scoped_ptr<AsyncFileUtilAdapter> isolated_file_util_;
  68   scoped_ptr<AsyncFileUtilAdapter> dragged_file_util_;
  69   scoped_ptr<AsyncFileUtilAdapter> transient_file_util_;
  70 };
  71
  72 }  // namespace storage
  73
  74 #endif  // STORAGE_BROWSER_FILEAPI_ISOLATED_FILE_SYSTEM_BACKEND_H_