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// Copyright 2013 The Chromium Authors
// 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/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "base/scoped_observation.h"
#include "components/keyed_service/core/keyed_service.h"
#include "extensions/browser/app_window/app_window_registry.h"
#include "extensions/browser/extension_host_registry.h"
namespace content {
class BrowserContext;
}
namespace apps {
// Observes startup of apps and their windows and notifies observers of these
// events.
class AppLifetimeMonitor : public KeyedService,
public extensions::AppWindowRegistry::Observer,
public extensions::ExtensionHostRegistry::Observer {
public:
class Observer {
public:
// Called when the app starts running.
virtual void OnAppStart(content::BrowserContext* context,
const std::string& app_id) {}
// Called when the app becomes active to the user, i.e. the first window
// becomes visible.
virtual void OnAppActivated(content::BrowserContext* context,
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(content::BrowserContext* context,
const std::string& app_id) {}
// Called when the app stops running.
virtual void OnAppStop(content::BrowserContext* context,
const std::string& app_id) {}
protected:
virtual ~Observer() = default;
};
explicit AppLifetimeMonitor(content::BrowserContext* context);
AppLifetimeMonitor(const AppLifetimeMonitor&) = delete;
AppLifetimeMonitor& operator=(const AppLifetimeMonitor&) = delete;
~AppLifetimeMonitor() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
// 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;
// extensions::ExtensionHostRegistry::Observer:
void OnExtensionHostCompletedFirstLoad(
content::BrowserContext* browser_context,
extensions::ExtensionHost* host) override;
void OnExtensionHostDestroyed(content::BrowserContext* browser_context,
extensions::ExtensionHost* host) 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);
raw_ptr<content::BrowserContext> context_;
base::ObserverList<Observer>::Unchecked observers_;
base::ScopedObservation<extensions::ExtensionHostRegistry,
extensions::ExtensionHostRegistry::Observer>
extension_host_registry_observation_{this};
};
} // namespace apps
#endif // APPS_APP_LIFETIME_MONITOR_H_
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