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// Copyright (c) 2009 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_CROS_POWER_LIBRARY_H_
#define CHROME_BROWSER_CHROMEOS_CROS_POWER_LIBRARY_H_
#pragma once
#include "base/observer_list.h"
#include "base/singleton.h"
#include "base/time.h"
#include "cros/chromeos_power.h"
namespace chromeos {
// This interface defines interaction with the ChromeOS power library APIs.
// Classes can add themselves as observers. Users can get an instance of this
// library class like this: PowerLibrary::Get()
class PowerLibrary {
public:
class Observer {
public:
virtual void PowerChanged(PowerLibrary* obj) = 0;
};
virtual ~PowerLibrary() {}
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// Whether or not the line power is connected.
virtual bool line_power_on() const = 0;
// Whether or not the battery is fully charged..
virtual bool battery_fully_charged() const = 0;
// The percentage (0-100) of remaining battery.
virtual double battery_percentage() const = 0;
// Whether there is a battery present.
virtual bool battery_is_present() const = 0;
// The amount of time until battery is empty.
virtual base::TimeDelta battery_time_to_empty() const = 0;
// The amount of time until battery is full.
virtual base::TimeDelta battery_time_to_full() const = 0;
};
// This class handles the interaction with the ChromeOS power library APIs.
// Classes can add themselves as observers. Users can get an instance of this
// library class like this: PowerLibrary::Get()
class PowerLibraryImpl : public PowerLibrary {
public:
PowerLibraryImpl();
virtual ~PowerLibraryImpl();
// PowerLibrary overrides.
virtual void AddObserver(Observer* observer);
virtual void RemoveObserver(Observer* observer);
// Whether or not the line power is connected.
virtual bool line_power_on() const;
// Whether or not the battery is fully charged..
virtual bool battery_fully_charged() const;
// The percentage (0-100) of remaining battery.
virtual double battery_percentage() const;
// Whether there is a battery present.
virtual bool battery_is_present() const;
// The amount of time until battery is empty.
virtual base::TimeDelta battery_time_to_empty() const;
// The amount of time until battery is full.
virtual base::TimeDelta battery_time_to_full() const;
private:
// This method is called when there's a change in power status.
// This method is called on a background thread.
static void PowerStatusChangedHandler(void* object,
const chromeos::PowerStatus& status);
// This methods starts the monitoring of power changes.
void Init();
// Called by the handler to update the power status.
// This will notify all the Observers.
void UpdatePowerStatus(const chromeos::PowerStatus& status);
ObserverList<Observer> observers_;
// A reference to the battery power api, to allow callbacks when the battery
// status changes.
chromeos::PowerStatusConnection power_status_connection_;
// The latest power status.
chromeos::PowerStatus status_;
DISALLOW_COPY_AND_ASSIGN(PowerLibraryImpl);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_CROS_POWER_LIBRARY_H_
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