blob: 34c67c23a0f662cfe080eec6faff2638eda61541 [file] [log] [blame]
// Copyright 2019 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <base/macros.h>
namespace power_manager {
class PrefsInterface;
// Converts actual battery percentage to display battery percentage and vice
// versa.
class BatteryPercentageConverter {
static std::unique_ptr<BatteryPercentageConverter> CreateFromPrefs(
PrefsInterface* prefs);
BatteryPercentageConverter(double low_battery_shutdown_percent,
double full_factor);
BatteryPercentageConverter(const BatteryPercentageConverter&) = delete;
BatteryPercentageConverter& operator=(const BatteryPercentageConverter&) =
// Converts actual battery percentage to the battery percentage which will be
// displayed to the user. Returns value in the range [0.0, 100.0].
double ConvertActualToDisplay(double actual_percentage) const;
// Converts displayed battery percentage to the actual battery percentage.
// Returns value in the range [0.0, 100.0].
double ConvertDisplayToActual(double display_percentage) const;
// Remaining battery percentage at which the system will shut down
// automatically. 0.0 if unset. Initialized from
// |kLowBatteryShutdownPercentPref|.
const double low_battery_shutdown_percent_ = 0.0;
// The fraction of the full charge at which the battery is considered full,
// in the range (0.0, 1.0]. Initialized from |kPowerSupplyFullFactorPref|.
const double full_factor_ = 1.0;
} // namespace power_manager