1 // Copyright 2013 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_LIFETIME_MONITOR_H_ 6 #define APPS_APP_LIFETIME_MONITOR_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "base/observer_list.h" 12 #include "components/keyed_service/core/keyed_service.h" 13 #include "content/public/browser/notification_observer.h" 14 #include "content/public/browser/notification_registrar.h" 15 #include "extensions/browser/app_window/app_window_registry.h" 16 17 namespace extensions { 18 class Extension; 19 } 20 21 class Profile; 22 23 namespace apps { 24 25 // Observes startup of apps and their windows and notifies observers of these 26 // events. 27 class AppLifetimeMonitor : public KeyedService, 28 public content::NotificationObserver, 29 public extensions::AppWindowRegistry::Observer { 30 public: 31 class Observer { 32 public: 33 // Called when the app starts running. OnAppStart(Profile * profile,const std::string & app_id)34 virtual void OnAppStart(Profile* profile, const std::string& app_id) {} 35 // Called when the app becomes active to the user, i.e. it opens a window. OnAppActivated(Profile * profile,const std::string & app_id)36 virtual void OnAppActivated(Profile* profile, const std::string& app_id) {} 37 // Called when the app becomes inactive to the user. OnAppDeactivated(Profile * profile,const std::string & app_id)38 virtual void OnAppDeactivated(Profile* profile, const std::string& app_id) { 39 } 40 // Called when the app stops running. OnAppStop(Profile * profile,const std::string & app_id)41 virtual void OnAppStop(Profile* profile, const std::string& app_id) {} 42 // Called when chrome is about to terminate. This gives observers a chance 43 // to do something before the apps shut down. This is a system-wide event 44 // so there is no associated profile and app id. OnChromeTerminating()45 virtual void OnChromeTerminating() {} 46 47 protected: ~Observer()48 virtual ~Observer() {} 49 }; 50 51 explicit AppLifetimeMonitor(Profile* profile); 52 virtual ~AppLifetimeMonitor(); 53 54 void AddObserver(Observer* observer); 55 void RemoveObserver(Observer* observer); 56 57 private: 58 // content::NotificationObserver overrides: 59 virtual void Observe(int type, 60 const content::NotificationSource& source, 61 const content::NotificationDetails& details) OVERRIDE; 62 63 // extensions::AppWindowRegistry::Observer overrides: 64 virtual void OnAppWindowRemoved(extensions::AppWindow* app_window) OVERRIDE; 65 virtual void OnAppWindowHidden(extensions::AppWindow* app_window) OVERRIDE; 66 virtual void OnAppWindowShown(extensions::AppWindow* app_window) OVERRIDE; 67 68 // KeyedService overrides: 69 virtual void Shutdown() OVERRIDE; 70 71 bool HasVisibleAppWindows(extensions::AppWindow* app_window) const; 72 73 void NotifyAppStart(const std::string& app_id); 74 void NotifyAppActivated(const std::string& app_id); 75 void NotifyAppDeactivated(const std::string& app_id); 76 void NotifyAppStop(const std::string& app_id); 77 void NotifyChromeTerminating(); 78 79 content::NotificationRegistrar registrar_; 80 Profile* profile_; 81 ObserverList<Observer> observers_; 82 83 DISALLOW_COPY_AND_ASSIGN(AppLifetimeMonitor); 84 }; 85 86 } // namespace apps 87 88 #endif // APPS_APP_LIFETIME_MONITOR_H_ 89