| // Copyright 2015 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 CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_SETTINGS_PRIVATE_EVENT_ROUTER_H_ |
| #define CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_SETTINGS_PRIVATE_EVENT_ROUTER_H_ |
| |
| #include "base/macros.h" |
| #include "chrome/browser/chromeos/settings/cros_settings.h" |
| #include "chrome/browser/extensions/api/settings_private/prefs_util.h" |
| #include "components/keyed_service/core/keyed_service.h" |
| #include "components/prefs/pref_change_registrar.h" |
| #include "extensions/browser/event_router.h" |
| |
| namespace content { |
| class BrowserContext; |
| } |
| |
| namespace extensions { |
| |
| class SettingsPrivateDelegate; |
| |
| // This is an event router that will observe listeners to pref changes on the |
| // appropriate pref service(s) and notify listeners on the JavaScript |
| // settingsPrivate API. |
| class SettingsPrivateEventRouter : public KeyedService, |
| public EventRouter::Observer { |
| public: |
| static SettingsPrivateEventRouter* Create( |
| content::BrowserContext* browser_context); |
| ~SettingsPrivateEventRouter() override; |
| |
| protected: |
| explicit SettingsPrivateEventRouter(content::BrowserContext* context); |
| |
| // KeyedService overrides: |
| void Shutdown() override; |
| |
| // EventRouter::Observer overrides: |
| void OnListenerAdded(const EventListenerInfo& details) override; |
| void OnListenerRemoved(const EventListenerInfo& details) override; |
| |
| // This registrar monitors for user prefs changes. |
| PrefChangeRegistrar user_prefs_registrar_; |
| |
| // This registrar monitors for local state changes. |
| PrefChangeRegistrar local_state_registrar_; |
| |
| private: |
| // Decide if we should listen for pref changes or not. If there are any |
| // JavaScript listeners registered for the onPrefsChanged event, then we |
| // want to register for change notification from the PrefChangeRegistrar. |
| // Otherwise, we want to unregister and not be listening for pref changes. |
| void StartOrStopListeningForPrefsChanges(); |
| |
| void OnPreferenceChanged(const std::string& pref_name); |
| |
| PrefChangeRegistrar* FindRegistrarForPref(const std::string& pref_name); |
| |
| typedef std::map<std::string, |
| linked_ptr<chromeos::CrosSettings::ObserverSubscription>> |
| SubscriptionMap; |
| SubscriptionMap cros_settings_subscription_map_; |
| |
| content::BrowserContext* context_; |
| bool listening_; |
| |
| scoped_ptr<PrefsUtil> prefs_util_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SettingsPrivateEventRouter); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_SETTINGS_PRIVATE_EVENT_ROUTER_H_ |