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      1 // Copyright (c) 2011 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_SYNC_GLUE_THEME_CHANGE_PROCESSOR_H_
      6 #define CHROME_BROWSER_SYNC_GLUE_THEME_CHANGE_PROCESSOR_H_
      7 #pragma once
      8 
      9 #include "base/basictypes.h"
     10 #include "chrome/browser/sync/engine/syncapi.h"
     11 #include "chrome/browser/sync/glue/change_processor.h"
     12 #include "content/common/notification_observer.h"
     13 #include "content/common/notification_registrar.h"
     14 #include "content/common/notification_type.h"
     15 
     16 class NotificationDetails;
     17 class NotificationSource;
     18 class Profile;
     19 
     20 namespace browser_sync {
     21 
     22 class UnrecoverableErrorHandler;
     23 
     24 // This class is responsible for taking changes from the
     25 // ThemeService and applying them to the sync_api 'syncable'
     26 // model, and vice versa. All operations and use of this class are
     27 // from the UI thread.
     28 class ThemeChangeProcessor : public ChangeProcessor,
     29                              public NotificationObserver {
     30  public:
     31   explicit ThemeChangeProcessor(UnrecoverableErrorHandler* error_handler);
     32   virtual ~ThemeChangeProcessor();
     33 
     34   // NotificationObserver implementation.
     35   // ThemeService -> sync_api model change application.
     36   virtual void Observe(NotificationType type,
     37                        const NotificationSource& source,
     38                        const NotificationDetails& details);
     39 
     40   // ChangeProcessor implementation.
     41   // sync_api model -> ThemeService change application.
     42   virtual void ApplyChangesFromSyncModel(
     43       const sync_api::BaseTransaction* trans,
     44       const sync_api::SyncManager::ChangeRecord* changes,
     45       int change_count);
     46 
     47  protected:
     48   // ChangeProcessor implementation.
     49   virtual void StartImpl(Profile* profile);
     50   virtual void StopImpl();
     51 
     52  private:
     53   void StartObserving();
     54   void StopObserving();
     55 
     56   NotificationRegistrar notification_registrar_;
     57   // Profile associated with the ThemeService.  Non-NULL iff |running()| is
     58   // true.
     59   Profile* profile_;
     60 
     61   DISALLOW_COPY_AND_ASSIGN(ThemeChangeProcessor);
     62 };
     63 
     64 }  // namespace browser_sync
     65 
     66 #endif  // CHROME_BROWSER_SYNC_GLUE_THEME_CHANGE_PROCESSOR_H_
     67