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