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// 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_
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