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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef APPS_APP_LIFETIME_MONITOR_H_
#define APPS_APP_LIFETIME_MONITOR_H_
#include <string>
#include <vector>
#include "base/observer_list.h"
#include "components/keyed_service/core/keyed_service.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "extensions/browser/app_window/app_window_registry.h"
namespace extensions {
class Extension;
}
class Profile;
namespace apps {
// Observes startup of apps and their windows and notifies observers of these
// events.
class AppLifetimeMonitor : public KeyedService,
public content::NotificationObserver,
public extensions::AppWindowRegistry::Observer {
public:
class Observer {
public:
// Called when the app starts running.
virtual void OnAppStart(Profile* profile, const std::string& app_id) {}
// Called when the app becomes active to the user, i.e. the first window
// becomes visible.
virtual void OnAppActivated(Profile* profile, const std::string& app_id) {}
// Called when the app becomes inactive to the user, i.e. the last window is
// hidden or closed.
virtual void OnAppDeactivated(Profile* profile, const std::string& app_id) {
}
// Called when the app stops running.
virtual void OnAppStop(Profile* profile, const std::string& app_id) {}
// Called when chrome is about to terminate. This gives observers a chance
// to do something before the apps shut down. This is a system-wide event
// so there is no associated profile and app id.
virtual void OnChromeTerminating() {}
protected:
virtual ~Observer() {}
};
explicit AppLifetimeMonitor(Profile* profile);
~AppLifetimeMonitor() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
// content::NotificationObserver overrides:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// extensions::AppWindowRegistry::Observer overrides:
void OnAppWindowRemoved(extensions::AppWindow* app_window) override;
void OnAppWindowHidden(extensions::AppWindow* app_window) override;
void OnAppWindowShown(extensions::AppWindow* app_window,
bool was_hidden) override;
// KeyedService overrides:
void Shutdown() override;
bool HasOtherVisibleAppWindows(extensions::AppWindow* app_window) const;
void NotifyAppStart(const std::string& app_id);
void NotifyAppActivated(const std::string& app_id);
void NotifyAppDeactivated(const std::string& app_id);
void NotifyAppStop(const std::string& app_id);
void NotifyChromeTerminating();
content::NotificationRegistrar registrar_;
Profile* profile_;
ObserverList<Observer> observers_;
DISALLOW_COPY_AND_ASSIGN(AppLifetimeMonitor);
};
} // namespace apps
#endif // APPS_APP_LIFETIME_MONITOR_H_
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