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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 APPS_APP_RESTORE_SERVICE_H_
      6 #define APPS_APP_RESTORE_SERVICE_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "apps/app_lifetime_monitor.h"
     12 #include "apps/shell_window_registry.h"
     13 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
     14 
     15 namespace extensions {
     16 class Extension;
     17 }
     18 
     19 class Profile;
     20 
     21 namespace apps {
     22 
     23 // Tracks what apps need to be restarted when the browser restarts.
     24 class AppRestoreService : public BrowserContextKeyedService,
     25                           public AppLifetimeMonitor::Observer {
     26  public:
     27   // Returns true if apps should be restored on the current platform, given
     28   // whether this new browser process launched due to a restart.
     29   static bool ShouldRestoreApps(bool is_browser_restart);
     30 
     31   explicit AppRestoreService(Profile* profile);
     32 
     33   // Restart apps that need to be restarted and clear the "running" preference
     34   // from apps to prevent them being restarted in subsequent restarts.
     35   void HandleStartup(bool should_restore_apps);
     36 
     37   // Returns whether this extension is running or, at startup, whether it was
     38   // running when Chrome was last terminated.
     39   bool IsAppRestorable(const std::string& extension_id);
     40 
     41   static AppRestoreService* Get(Profile* profile);
     42 
     43  private:
     44   // AppLifetimeMonitor::Observer.
     45   virtual void OnAppStart(Profile* profile, const std::string& app_id) OVERRIDE;
     46   virtual void OnAppActivated(Profile* profile,
     47                               const std::string& app_id) OVERRIDE;
     48   virtual void OnAppDeactivated(Profile* profile,
     49                                 const std::string& app_id) OVERRIDE;
     50   virtual void OnAppStop(Profile* profile, const std::string& app_id) OVERRIDE;
     51   virtual void OnChromeTerminating() OVERRIDE;
     52 
     53   // BrowserContextKeyedService.
     54   virtual void Shutdown() OVERRIDE;
     55 
     56   void RecordAppStart(const std::string& extension_id);
     57   void RecordAppStop(const std::string& extension_id);
     58   void RecordAppActiveState(const std::string& id, bool is_active);
     59 
     60   void RestoreApp(const extensions::Extension* extension);
     61 
     62   void StartObservingAppLifetime();
     63   void StopObservingAppLifetime();
     64 
     65   Profile* profile_;
     66 
     67   DISALLOW_COPY_AND_ASSIGN(AppRestoreService);
     68 };
     69 
     70 }  // namespace apps
     71 
     72 #endif  // APPS_APP_RESTORE_SERVICE_H_
     73