// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_LOADER_OBSERVER_H_
#define CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_LOADER_OBSERVER_H_
namespace base {
class FilePath;
} // namespace base
namespace drive {
namespace internal {
// Interface for classes that need to observe events from ChangeListLoader.
// All events are notified on UI thread.
class ChangeListLoaderObserver {
public:
// Triggered when a content of a directory has been changed.
// |directory_path| is a virtual directory path representing the
// changed directory.
virtual void OnDirectoryChanged(const base::FilePath& directory_path) {}
// Triggered when loading from the server is complete.
virtual void OnLoadFromServerComplete() {}
// Triggered when loading is complete for the first time, either from the
// the server or the cache. To be precise, for the latter case, we do not
// load anything from the cache. We just check that the resource metadata
// is stored locally thus can be used.
virtual void OnInitialLoadComplete() {}
protected:
virtual ~ChangeListLoaderObserver() {}
};
} // namespace internal
} // namespace drive
#endif // CHROME_BROWSER_CHROMEOS_DRIVE_CHANGE_LIST_LOADER_OBSERVER_H_