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      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 CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OBSERVER_H_
      6 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OBSERVER_H_
      7 
      8 #include "chrome/browser/chromeos/drive/file_errors.h"
      9 #include "chrome/browser/chromeos/drive/file_system/operation_delegate.h"
     10 
     11 namespace base {
     12 class FilePath;
     13 }
     14 
     15 namespace drive {
     16 
     17 class FileChange;
     18 
     19 // Interface for classes that need to observe events from classes implementing
     20 // FileSystemInterface.
     21 // All events are notified on UI thread.
     22 class FileSystemObserver {
     23  public:
     24   // Triggered when a content of a directory has been changed.
     25   // |directory_path| is a virtual directory path (/drive/...) representing
     26   // changed directory.
     27   virtual void OnDirectoryChanged(const base::FilePath& directory_path) {}
     28   virtual void OnFileChanged(const FileChange& file_change) {}
     29 
     30   // Triggared when a specific drive error occurred.
     31   // |type| is a type of the error. |file_name| is a virtual path of the entry.
     32   virtual void OnDriveSyncError(file_system::DriveSyncErrorType type,
     33                                 const base::FilePath& file_path) {}
     34 
     35  protected:
     36   virtual ~FileSystemObserver() {}
     37 };
     38 
     39 }  // namespace drive
     40 
     41 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OBSERVER_H_
     42