chrome/browser/chromeos/fileapi/file_system_backend_delegate.h

   1 // Copyright 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_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
   6 #define CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback_forward.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "storage/browser/fileapi/file_system_backend.h"
  12 #include "storage/common/fileapi/file_system_types.h"
  13
  14 class GURL;
  15
  16 namespace base {
  17 class Time;
  18 }  // namespace base
  19
  20 namespace storage {
  21 class AsyncFileUtil;
  22 class FileSystemContext;
  23 class FileStreamReader;
  24 class FileSystemURL;
  25 class FileStreamWriter;
  26 class WatcherManager;
  27 }  // namespace storage
  28
  29 namespace chromeos {
  30
  31 // This is delegate interface to inject the implementation of the some methods
  32 // of FileSystemBackend.
  33 class FileSystemBackendDelegate {
  34  public:
  35   virtual ~FileSystemBackendDelegate() {}
  36
  37   // Called from FileSystemBackend::GetAsyncFileUtil().
  38   virtual storage::AsyncFileUtil* GetAsyncFileUtil(
  39       storage::FileSystemType type) = 0;
  40
  41   // Called from FileSystemBackend::CreateFileStreamReader().
  42   virtual scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
  43       const storage::FileSystemURL& url,
  44       int64 offset,
  45       int64 max_bytes_to_read,
  46       const base::Time& expected_modification_time,
  47       storage::FileSystemContext* context) = 0;
  48
  49   // Called from FileSystemBackend::CreateFileStreamWriter().
  50   virtual scoped_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
  51       const storage::FileSystemURL& url,
  52       int64 offset,
  53       storage::FileSystemContext* context) = 0;
  54
  55   // Called from the FileSystemWatcherService class. The returned pointer must
  56   // stay valid until shutdown.
  57   virtual storage::WatcherManager* GetWatcherManager(
  58       storage::FileSystemType type) = 0;
  59
  60   // Called from FileSystemBackend::GetRedirectURLForContents.  Please ensure
  61   // that the returned URL is secure to be opened in a browser tab, or referred
  62   // from <img>, <video>, XMLHttpRequest, etc...
  63   virtual void GetRedirectURLForContents(
  64       const storage::FileSystemURL& url,
  65       const storage::URLCallback& callback) = 0;
  66 };
  67
  68 }  // namespace chromeos
  69
  70 #endif  // CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_