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/keyed_service/core/keyed_service.h"
  14 #include "content/public/browser/notification_observer.h"
  15 #include "content/public/browser/notification_registrar.h"
  16 #include "extensions/browser/extension_registry_observer.h"
  17
  18 class AppSyncUIStateObserver;
  19 class Profile;
  20 class ProfileSyncService;
  21
  22 namespace extensions {
  23 class ExtensionRegistry;
  24 }
  25
  26 // AppSyncUIState watches app sync and installation and change its state
  27 // accordingly. Its status is for UI display only. It only watches for new
  28 // normal user profile (i.e. it does not watch for guest profile or exsiting
  29 // user profile) and lasts for at the most 1 minute.
  30 class AppSyncUIState : public KeyedService,
  31                        public ProfileSyncServiceObserver,
  32                        public extensions::ExtensionRegistryObserver {
  33  public:
  34   enum Status {
  35     STATUS_NORMAL,
  36     STATUS_SYNCING,    // Syncing apps or installing synced apps.
  37     STATUS_TIMED_OUT,  // Timed out when waiting for sync to finish.
  38   };
  39
  40   // Returns the instance for the given |profile|. It's a convenience wrapper
  41   // of AppSyncUIStateFactory::GetForProfile. Note this function returns
  42   // NULL if ShouldObserveAppSyncForProfile returns false for |profile|.
  43   static AppSyncUIState* Get(Profile* profile);
  44
  45   // Returns true if |profile| should be watched for app syncing.
  46   static bool ShouldObserveAppSyncForProfile(Profile* profile);
  47
  48   explicit AppSyncUIState(Profile* profile);
  49   virtual ~AppSyncUIState();
  50
  51   void AddObserver(AppSyncUIStateObserver* observer);
  52   void RemoveObserver(AppSyncUIStateObserver* observer);
  53
  54   Status status() const { return status_; }
  55
  56  private:
  57   void StartObserving();
  58   void StopObserving();
  59
  60   void SetStatus(Status status);
  61
  62   // Checks and sets app sync status. If sync has not setup, do nothing. If sync
  63   // is completed and there is no pending synced extension install, sets
  64   // STATUS_SYNCING. Otherwise, sets STATUS_NORMAL.
  65   void CheckAppSync();
  66
  67   // Invoked when |max_syncing_status_timer_| fires.
  68   void OnMaxSyncingTimer();
  69
  70   // ProfileSyncServiceObserver overrides:
  71   virtual void OnStateChanged() OVERRIDE;
  72
  73   // extensions::ExtensionRegistryObserver overrides:
  74   virtual void OnExtensionLoaded(
  75       content::BrowserContext* browser_context,
  76       const extensions::Extension* extension) OVERRIDE;
  77
  78   Profile* profile_;
  79   ProfileSyncService* sync_service_;
  80
  81   // Timer to limit how much time STATUS_SYNCING is allowed.
  82   base::OneShotTimer<AppSyncUIState> max_syncing_status_timer_;
  83
  84   Status status_;
  85   ObserverList<AppSyncUIStateObserver> observers_;
  86
  87   extensions::ExtensionRegistry* extension_registry_;
  88
  89   DISALLOW_COPY_AND_ASSIGN(AppSyncUIState);
  90 };
  91
  92 #endif  // CHROME_BROWSER_UI_ASH_APP_SYNC_UI_STATE_H_