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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_THEMES_THEME_SYNCABLE_SERVICE_H_
      6 #define CHROME_BROWSER_THEMES_THEME_SYNCABLE_SERVICE_H_
      7 
      8 #include "base/gtest_prod_util.h"
      9 #include "base/threading/thread_checker.h"
     10 #include "sync/api/sync_change.h"
     11 #include "sync/api/sync_data.h"
     12 #include "sync/api/sync_error_factory.h"
     13 #include "sync/api/sync_error.h"
     14 #include "sync/api/syncable_service.h"
     15 
     16 class Profile;
     17 class ThemeService;
     18 class ThemeSyncableServiceTest;
     19 
     20 namespace sync_pb {
     21 class ThemeSpecifics;
     22 }
     23 
     24 class ThemeSyncableService : public syncer::SyncableService {
     25  public:
     26   ThemeSyncableService(Profile* profile,  // Same profile used by theme_service.
     27                        ThemeService* theme_service);
     28   virtual ~ThemeSyncableService();
     29 
     30   static syncer::ModelType model_type() { return syncer::THEMES; }
     31 
     32   // Called by ThemeService when user changes theme.
     33   void OnThemeChange();
     34 
     35   // syncer::SyncableService implementation.
     36   virtual syncer::SyncMergeResult MergeDataAndStartSyncing(
     37       syncer::ModelType type,
     38       const syncer::SyncDataList& initial_sync_data,
     39       scoped_ptr<syncer::SyncChangeProcessor> sync_processor,
     40       scoped_ptr<syncer::SyncErrorFactory> error_handler) OVERRIDE;
     41   virtual void StopSyncing(syncer::ModelType type) OVERRIDE;
     42   virtual syncer::SyncDataList GetAllSyncData(
     43       syncer::ModelType type) const OVERRIDE;
     44   virtual syncer::SyncError ProcessSyncChanges(
     45       const tracked_objects::Location& from_here,
     46       const syncer::SyncChangeList& change_list) OVERRIDE;
     47 
     48   // Client tag and tile of theme node in sync.
     49   static const char kCurrentThemeClientTag[];
     50   static const char kCurrentThemeNodeTitle[];
     51 
     52  private:
     53   static bool AreThemeSpecificsEqual(
     54       const sync_pb::ThemeSpecifics& a,
     55       const sync_pb::ThemeSpecifics& b,
     56       bool is_system_theme_distinct_from_default_theme);
     57 
     58   // Set theme from theme specifics in |sync_data| using
     59   // SetCurrentThemeFromThemeSpecifics() if it's different from |current_specs|.
     60   void MaybeSetTheme(const sync_pb::ThemeSpecifics& current_specs,
     61                      const syncer::SyncData& sync_data);
     62 
     63   void SetCurrentThemeFromThemeSpecifics(
     64       const sync_pb::ThemeSpecifics& theme_specifics);
     65 
     66   // If the current theme is syncable, fills in the passed |theme_specifics|
     67   // structure based on the currently applied theme and returns |true|.
     68   // Otherwise returns |false|.
     69   bool GetThemeSpecificsFromCurrentTheme(
     70       sync_pb::ThemeSpecifics* theme_specifics) const;
     71 
     72   // Updates theme specifics in sync to |theme_specifics|.
     73   syncer::SyncError ProcessNewTheme(
     74       syncer::SyncChange::SyncChangeType change_type,
     75       const sync_pb::ThemeSpecifics& theme_specifics);
     76 
     77   Profile* const profile_;
     78   ThemeService* const theme_service_;
     79 
     80   scoped_ptr<syncer::SyncChangeProcessor> sync_processor_;
     81   scoped_ptr<syncer::SyncErrorFactory> sync_error_handler_;
     82 
     83   // Persist use_system_theme_by_default for platforms that use it, even if
     84   // we're not on one.
     85   bool use_system_theme_by_default_;
     86 
     87   base::ThreadChecker thread_checker_;
     88 
     89   FRIEND_TEST_ALL_PREFIXES(ThemeSyncableServiceTest, AreThemeSpecificsEqual);
     90 
     91   DISALLOW_COPY_AND_ASSIGN(ThemeSyncableService);
     92 };
     93 
     94 #endif  // CHROME_BROWSER_THEMES_THEME_SYNCABLE_SERVICE_H_
     95