| // Copyright (c) 2012 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_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_ |
| #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_ |
| |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/callback.h" |
| #include "base/compiler_specific.h" |
| #include "chromeos/ime/input_method_manager.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| |
| namespace chromeos { |
| namespace input_method { |
| |
| // Translates notifications from the browser (not logged in, logged in, etc.), |
| // into InputMethodManager::State transitions. |
| class BrowserStateMonitor : public content::NotificationObserver { |
| public: |
| // Constructs a monitor that will invoke the given observer callback whenever |
| // the InputMethodManager::State changes. Assumes that the current state is |
| // STATE_LOGIN_SCREEN. |observer| may be null. |
| explicit BrowserStateMonitor( |
| const base::Callback<void(InputMethodManager::State)>& observer); |
| virtual ~BrowserStateMonitor(); |
| |
| InputMethodManager::State state() const { return state_; } |
| |
| // content::NotificationObserver overrides: |
| virtual void Observe(int type, |
| const content::NotificationSource& source, |
| const content::NotificationDetails& details) OVERRIDE; |
| |
| private: |
| base::Callback<void(InputMethodManager::State)> observer_; |
| InputMethodManager::State state_; |
| content::NotificationRegistrar notification_registrar_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BrowserStateMonitor); |
| }; |
| |
| } // namespace input_method |
| } // namespace chromeos |
| |
| #endif // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_ |