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/* This file is part of the KDE project
SPDX-FileCopyrightText: 2006 Kevin Ottens <ervin@kde.org>
SPDX-FileCopyrightText: 2008-2010 Dario Freddi <drf@kde.org>
SPDX-FileCopyrightText: 2010 Alejandro Fiestas <alex@eyeos.org>
SPDX-FileCopyrightText: 2010-2013 Lukáš Tinkl <ltinkl@redhat.com>
SPDX-FileCopyrightText: 2015 Kai Uwe Broulik <kde@privat.broulik.de>
SPDX-License-Identifier: LGPL-2.0-only
*/
#include "batterycontroller.h"
#include <QDBusConnection>
using namespace Qt::StringLiterals;
inline constexpr QLatin1StringView UPOWER_SERVICE("org.freedesktop.UPower");
inline constexpr QLatin1StringView UPOWER_PATH("/org/freedesktop/UPower");
inline constexpr QLatin1StringView UPOWER_IFACE("org.freedesktop.UPower");
inline constexpr QLatin1StringView UPOWER_IFACE_DEVICE("org.freedesktop.UPower.Device");
BatteryController::BatteryController()
: QObject()
{
QDBusConnection::systemBus().connect(UPOWER_SERVICE,
UPOWER_PATH,
u"org.freedesktop.DBus.Properties"_s,
u"PropertiesChanged"_s,
this,
SLOT(onPropertiesChanged(QString, QVariantMap, QStringList)));
QDBusConnection::systemBus().connect(UPOWER_SERVICE, UPOWER_PATH, UPOWER_IFACE, u"DeviceAdded"_s, this, SLOT(slotDeviceAdded(QDBusObjectPath)));
QDBusConnection::systemBus().connect(UPOWER_SERVICE, UPOWER_PATH, UPOWER_IFACE, u"DeviceRemoved"_s, this, SLOT(slotDeviceRemoved(QDBusObjectPath)));
m_upowerInterface = new OrgFreedesktopUPowerInterface(UPOWER_SERVICE, u"/org/freedesktop/UPower"_s, QDBusConnection::systemBus(), this);
m_onBattery = m_upowerInterface->onBattery();
QDBusReply<QDBusObjectPath> reply = m_upowerInterface->call(u"GetDisplayDevice"_s);
if (reply.isValid()) {
const QString path = reply.value().path();
if (!path.isEmpty() && path != QStringLiteral("/")) {
m_displayDevice = std::make_unique<UPowerDevice>(path);
connect(m_displayDevice.get(), &UPowerDevice::propertiesChanged, this, &BatteryController::updateDeviceProps);
}
}
if (!m_displayDevice) {
const QList<QDBusObjectPath> deviceList = m_upowerInterface->EnumerateDevices();
for (const QDBusObjectPath &device : deviceList) {
if (m_devices.count(device.path())) {
continue;
}
addDevice(device.path());
}
}
updateDeviceProps();
if (m_onBattery) {
m_acAdapterState = Unplugged;
} else {
m_acAdapterState = Plugged;
}
Q_EMIT acAdapterStateChanged(m_acAdapterState);
}
void BatteryController::addDevice(const QString &device)
{
if (m_displayDevice) {
return;
}
auto upowerDevice = std::make_unique<UPowerDevice>(device);
connect(upowerDevice.get(), &UPowerDevice::propertiesChanged, this, &BatteryController::updateDeviceProps);
m_devices[device] = std::move(upowerDevice);
}
void BatteryController::slotDeviceAdded(const QDBusObjectPath &path)
{
addDevice(path.path());
updateDeviceProps();
}
void BatteryController::slotDeviceRemoved(const QDBusObjectPath &path)
{
m_devices.erase(path.path());
updateDeviceProps();
}
void BatteryController::updateDeviceProps()
{
double energyTotal = 0.0;
double energyRateTotal = 0.0; // +: charging, -: discharging (contrary to EnergyRate)
double energyFullTotal = 0.0;
qulonglong timestamp = 0;
if (m_displayDevice) {
if (!m_displayDevice->isPresent()) {
// No Battery/Ups, nothing to report
return;
}
const auto state = m_displayDevice->state();
energyTotal = m_displayDevice->energy();
energyFullTotal = m_displayDevice->energyFull();
timestamp = m_displayDevice->updateTime();
// Workaround for https://gitlab.freedesktop.org/upower/upower/-/issues/252
if (state == UPowerDevice::State::Charging) {
energyRateTotal = std::abs(m_displayDevice->energyRate());
} else if (state == UPowerDevice::State::Discharging) {
energyRateTotal = -std::abs(m_displayDevice->energyRate());
}
} else {
for (const auto &[key, upowerDevice] : m_devices) {
if (!upowerDevice->isPowerSupply() || !upowerDevice->isPresent()) {
continue;
}
const auto type = upowerDevice->type();
if (type == UPowerDevice::Type::Battery || type == UPowerDevice::Type::Ups) {
const auto state = upowerDevice->state();
energyFullTotal += upowerDevice->energyFull();
energyTotal += upowerDevice->energy();
if (state == UPowerDevice::State::FullyCharged) {
continue;
}
timestamp = std::max(timestamp, upowerDevice->updateTime());
// Workaround for https://gitlab.freedesktop.org/upower/upower/-/issues/252
if (state == UPowerDevice::State::Charging) {
energyRateTotal += std::abs(upowerDevice->energyRate());
} else if (state == UPowerDevice::State::Discharging) {
energyRateTotal -= std::abs(upowerDevice->energyRate());
}
}
}
}
m_batteryEnergy = energyTotal;
m_batteryEnergyFull = energyFullTotal;
setBatteryRate(energyRateTotal, timestamp);
}
void BatteryController::onPropertiesChanged(const QString &ifaceName, const QVariantMap &changedProps, const QStringList &invalidatedProps)
{
if (ifaceName != UPOWER_IFACE) {
return;
}
bool onBattery = m_onBattery;
if (changedProps.contains(QStringLiteral("OnBattery"))) {
onBattery = changedProps[QStringLiteral("OnBattery")].toBool();
} else if (invalidatedProps.contains(QStringLiteral("OnBattery"))) {
onBattery = m_upowerInterface->onBattery();
}
if (onBattery != m_onBattery) {
m_acAdapterState = onBattery ? Unplugged : Plugged;
Q_EMIT acAdapterStateChanged(m_acAdapterState);
m_onBattery = onBattery;
}
}
/**
* Filter data along one dimension using exponential moving average.
*/
double emafilter(const double last, const double update, double weight)
{
double current = last * (1 - weight) + update * weight;
return current;
}
void BatteryController::setBatteryRate(const double rate, qulonglong timestamp)
{
// remaining time in milliseconds
qulonglong time = 0;
if (rate > 0) {
// Energy and rate are in Watt*hours resp. Watt
time = 3600 * 1000 * (m_batteryEnergyFull - m_batteryEnergy) / rate;
} else if (rate < 0) {
time = 3600 * 1000 * (0.0 - m_batteryEnergy) / rate;
}
if (m_batteryRemainingTime != time) {
m_batteryRemainingTime = time;
Q_EMIT batteryRemainingTimeChanged(time);
}
// Charging or full
if ((rate > 0) || (time == 0)) {
if (m_smoothedBatteryRemainingTime != time) {
m_smoothedBatteryRemainingTime = time;
Q_EMIT smoothedBatteryRemainingTimeChanged(time);
}
return;
}
double oldRate = m_smoothedBatteryDischargeRate;
if (oldRate == 0) {
m_smoothedBatteryDischargeRate = rate;
} else {
// To have a time constant independent from the update frequency
// the weight must be scaled
double weight = 0.005 * std::min<qulonglong>(60, timestamp - m_lastRateTimestamp);
m_lastRateTimestamp = timestamp;
m_smoothedBatteryDischargeRate = emafilter(oldRate, rate, weight);
}
time = 3600 * 1000 * (0.0 - m_batteryEnergy) / m_smoothedBatteryDischargeRate;
if (m_smoothedBatteryRemainingTime != time) {
m_smoothedBatteryRemainingTime = time;
Q_EMIT smoothedBatteryRemainingTimeChanged(m_smoothedBatteryRemainingTime);
}
}
BatteryController::AcAdapterState BatteryController::acAdapterState() const
{
return m_acAdapterState;
}
qulonglong BatteryController::batteryRemainingTime() const
{
return m_batteryRemainingTime;
}
qulonglong BatteryController::smoothedBatteryRemainingTime() const
{
return m_smoothedBatteryRemainingTime;
}
#include "moc_batterycontroller.cpp"
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