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      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       const storage::FileSystemURL& url) = 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_
     71