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 CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_ 6 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/callback.h" 12 #include "base/compiler_specific.h" 13 #include "chromeos/ime/input_method_manager.h" 14 #include "content/public/browser/notification_observer.h" 15 #include "content/public/browser/notification_registrar.h" 16 17 namespace chromeos { 18 namespace input_method { 19 20 // Translates notifications from the browser (not logged in, logged in, etc.), 21 // into InputMethodManager::State transitions. 22 class BrowserStateMonitor : public content::NotificationObserver { 23 public: 24 // Constructs a monitor that will invoke the given observer callback whenever 25 // the InputMethodManager::State changes. Assumes that the current state is 26 // STATE_LOGIN_SCREEN. |observer| may be null. 27 explicit BrowserStateMonitor( 28 const base::Callback<void(InputMethodManager::State)>& observer); 29 virtual ~BrowserStateMonitor(); 30 31 InputMethodManager::State state() const { return state_; } 32 33 // content::NotificationObserver overrides: 34 virtual void Observe(int type, 35 const content::NotificationSource& source, 36 const content::NotificationDetails& details) OVERRIDE; 37 38 private: 39 base::Callback<void(InputMethodManager::State)> observer_; 40 InputMethodManager::State state_; 41 content::NotificationRegistrar notification_registrar_; 42 43 DISALLOW_COPY_AND_ASSIGN(BrowserStateMonitor); 44 }; 45 46 } // namespace input_method 47 } // namespace chromeos 48 49 #endif // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_ 50
