chrome/browser/ui/ash/app_sync_ui_state.h

   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_UI_ASH_APP_SYNC_UI_STATE_H_
   6 #define CHROME_BROWSER_UI_ASH_APP_SYNC_UI_STATE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/observer_list.h"
  11 #include "base/timer/timer.h"
  12 #include "chrome/browser/sync/profile_sync_service_observer.h"
  13 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
  14 #include "content/public/browser/notification_observer.h"
  15 #include "content/public/browser/notification_registrar.h"
  16
  17 class AppSyncUIStateObserver;
  18 class Profile;
  19 class ProfileSyncService;
  20
  21 // AppSyncUIState watches app sync and installation and change its state
  22 // accordingly. Its status is for UI display only. It only watches for new
  23 // normal user profile (i.e. it does not watch for guest profile or exsiting
  24 // user profile) and lasts for at the most 1 minute.
  25 class AppSyncUIState : public BrowserContextKeyedService,
  26                        public content::NotificationObserver,
  27                        public ProfileSyncServiceObserver {
  28  public:
  29   enum Status {
  30     STATUS_NORMAL,
  31     STATUS_SYNCING,    // Syncing apps or installing synced apps.
  32     STATUS_TIMED_OUT,  // Timed out when waiting for sync to finish.
  33   };
  34
  35   // Returns the instance for the given |profile|. It's a convenience wrapper
  36   // of AppSyncUIStateFactory::GetForProfile. Note this function returns
  37   // NULL if ShouldObserveAppSyncForProfile returns false for |profile|.
  38   static AppSyncUIState* Get(Profile* profile);
  39
  40   // Returns true if |profile| should be watched for app syncing.
  41   static bool ShouldObserveAppSyncForProfile(Profile* profile);
  42
  43   explicit AppSyncUIState(Profile* profile);
  44   virtual ~AppSyncUIState();
  45
  46   void AddObserver(AppSyncUIStateObserver* observer);
  47   void RemoveObserver(AppSyncUIStateObserver* observer);
  48
  49   Status status() const { return status_; }
  50
  51  private:
  52   void StartObserving();
  53   void StopObserving();
  54
  55   void SetStatus(Status status);
  56
  57   // Checks and sets app sync status. If sync has not setup, do nothing. If sync
  58   // is completed and there is no pending synced extension install, sets
  59   // STATUS_SYNCING. Otherwise, sets STATUS_NORMAL.
  60   void CheckAppSync();
  61
  62   // Invoked when |max_syncing_status_timer_| fires.
  63   void OnMaxSyncingTimer();
  64
  65   // content::NotificationObserver overrides:
  66   virtual void Observe(int type,
  67                        const content::NotificationSource& source,
  68                        const content::NotificationDetails& details) OVERRIDE;
  69
  70   // ProfileSyncServiceObserver overrides:
  71   virtual void OnStateChanged() OVERRIDE;
  72
  73   content::NotificationRegistrar registrar_;
  74
  75   Profile* profile_;
  76   ProfileSyncService* sync_service_;
  77
  78   // Timer to limit how much time STATUS_SYNCING is allowed.
  79   base::OneShotTimer<AppSyncUIState> max_syncing_status_timer_;
  80
  81   Status status_;
  82   ObserverList<AppSyncUIStateObserver> observers_;
  83
  84   DISALLOW_COPY_AND_ASSIGN(AppSyncUIState);
  85 };
  86
  87 #endif  // CHROME_BROWSER_UI_ASH_APP_SYNC_UI_STATE_H_