chrome/browser/media_galleries/fileapi/media_file_system_backend.h

   1 // Copyright (c) 2013 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 CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MEDIA_FILE_SYSTEM_BACKEND_H_
   6 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MEDIA_FILE_SYSTEM_BACKEND_H_
   7
   8 #include <string>
   9
  10 #include "base/callback.h"
  11 #include "base/files/file_path.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "chrome/browser/media_galleries/media_galleries_preferences.h"
  15 #include "storage/browser/fileapi/file_system_backend.h"
  16 #include "storage/browser/fileapi/task_runner_bound_observer_list.h"
  17
  18 namespace base {
  19 class SequencedTaskRunner;
  20 }
  21
  22 namespace storage {
  23 class FileSystemURL;
  24 }
  25
  26 namespace net {
  27 class URLRequest;
  28 }
  29
  30 class MediaPathFilter;
  31 class DeviceMediaAsyncFileUtil;
  32
  33 class MediaFileSystemBackend : public storage::FileSystemBackend {
  34  public:
  35   static const char kMediaTaskRunnerName[];
  36
  37   MediaFileSystemBackend(
  38       const base::FilePath& profile_path,
  39       base::SequencedTaskRunner* media_task_runner);
  40   ~MediaFileSystemBackend() override;
  41
  42   static bool CurrentlyOnMediaTaskRunnerThread();
  43   static scoped_refptr<base::SequencedTaskRunner> MediaTaskRunner();
  44
  45   // Construct the mount point for the gallery specified by |pref_id| in
  46   // the profile located in |profile_path|.
  47   static std::string ConstructMountName(const base::FilePath& profile_path,
  48                                         const std::string& extension_id,
  49                                         MediaGalleryPrefId pref_id);
  50
  51   static bool AttemptAutoMountForURLRequest(
  52       const net::URLRequest* url_request,
  53       const storage::FileSystemURL& filesystem_url,
  54       const std::string& storage_domain,
  55       const base::Callback<void(base::File::Error result)>& callback);
  56
  57   // FileSystemBackend implementation.
  58   bool CanHandleType(storage::FileSystemType type) const override;
  59   void Initialize(storage::FileSystemContext* context) override;
  60   void ResolveURL(const storage::FileSystemURL& url,
  61                   storage::OpenFileSystemMode mode,
  62                   const OpenFileSystemCallback& callback) override;
  63   storage::AsyncFileUtil* GetAsyncFileUtil(
  64       storage::FileSystemType type) override;
  65   storage::WatcherManager* GetWatcherManager(
  66       storage::FileSystemType type) override;
  67   storage::CopyOrMoveFileValidatorFactory* GetCopyOrMoveFileValidatorFactory(
  68       storage::FileSystemType type,
  69       base::File::Error* error_code) override;
  70   storage::FileSystemOperation* CreateFileSystemOperation(
  71       const storage::FileSystemURL& url,
  72       storage::FileSystemContext* context,
  73       base::File::Error* error_code) const override;
  74   bool SupportsStreaming(const storage::FileSystemURL& url) const override;
  75   bool HasInplaceCopyImplementation(
  76       storage::FileSystemType type) const override;
  77   scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
  78       const storage::FileSystemURL& url,
  79       int64 offset,
  80       int64 max_bytes_to_read,
  81       const base::Time& expected_modification_time,
  82       storage::FileSystemContext* context) const override;
  83   scoped_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
  84       const storage::FileSystemURL& url,
  85       int64 offset,
  86       storage::FileSystemContext* context) const override;
  87   storage::FileSystemQuotaUtil* GetQuotaUtil() override;
  88   const storage::UpdateObserverList* GetUpdateObservers(
  89       storage::FileSystemType type) const override;
  90   const storage::ChangeObserverList* GetChangeObservers(
  91       storage::FileSystemType type) const override;
  92   const storage::AccessObserverList* GetAccessObservers(
  93       storage::FileSystemType type) const override;
  94
  95  private:
  96   // Store the profile path. We need this to create temporary snapshot files.
  97   const base::FilePath profile_path_;
  98
  99   scoped_refptr<base::SequencedTaskRunner> media_task_runner_;
 100
 101   scoped_ptr<MediaPathFilter> media_path_filter_;
 102   scoped_ptr<storage::CopyOrMoveFileValidatorFactory>
 103       media_copy_or_move_file_validator_factory_;
 104
 105   scoped_ptr<storage::AsyncFileUtil> native_media_file_util_;
 106   scoped_ptr<DeviceMediaAsyncFileUtil> device_media_async_file_util_;
 107 #if defined(OS_WIN) || defined(OS_MACOSX)
 108   scoped_ptr<storage::AsyncFileUtil> picasa_file_util_;
 109   scoped_ptr<storage::AsyncFileUtil> itunes_file_util_;
 110 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 111 #if defined(OS_MACOSX)
 112   scoped_ptr<storage::AsyncFileUtil> iphoto_file_util_;
 113 #endif  // defined(OS_MACOSX)
 114
 115   DISALLOW_COPY_AND_ASSIGN(MediaFileSystemBackend);
 116 };
 117
 118 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MEDIA_FILE_SYSTEM_BACKEND_H_