134 lines
3.7 KiB
C#
134 lines
3.7 KiB
C#
/*
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* Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Collections.Generic;
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using System.Timers;
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using SafeExamBrowser.Contracts.I18n;
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using SafeExamBrowser.Contracts.Logging;
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using SafeExamBrowser.Contracts.SystemComponents;
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using SafeExamBrowser.Contracts.UserInterface.Shell;
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using PowerLineStatus = System.Windows.Forms.PowerLineStatus;
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using SystemInformation = System.Windows.Forms.SystemInformation;
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namespace SafeExamBrowser.SystemComponents
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{
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public class PowerSupply : ISystemComponent<ISystemPowerSupplyControl>
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{
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private const int TWO_SECONDS = 2000;
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private bool infoShown, warningShown;
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private ILogger logger;
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private IList<ISystemPowerSupplyControl> controls;
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private IText text;
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private Timer timer;
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public PowerSupply(ILogger logger, IText text)
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{
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this.controls = new List<ISystemPowerSupplyControl>();
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this.logger = logger;
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this.text = text;
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}
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public void Initialize()
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{
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timer = new Timer(TWO_SECONDS);
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timer.Elapsed += Timer_Elapsed;
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timer.AutoReset = true;
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timer.Start();
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logger.Info("Started monitoring the power supply.");
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}
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public void Register(ISystemPowerSupplyControl control)
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{
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controls.Add(control);
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UpdateControls();
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}
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public void Terminate()
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{
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if (timer != null)
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{
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timer.Stop();
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logger.Info("Stopped monitoring the power supply.");
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}
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foreach (var control in controls)
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{
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control.Close();
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}
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}
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private void Timer_Elapsed(object sender, ElapsedEventArgs e)
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{
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UpdateControls();
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}
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private void UpdateControls()
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{
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var charge = SystemInformation.PowerStatus.BatteryLifePercent;
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var percentage = Math.Round(charge * 100);
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var status = charge <= 0.4 ? (charge <= 0.2 ? BatteryChargeStatus.Critical : BatteryChargeStatus.Low) : BatteryChargeStatus.Okay;
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var online = SystemInformation.PowerStatus.PowerLineStatus == PowerLineStatus.Online;
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var tooltip = string.Empty;
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if (online)
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{
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tooltip = text.Get(percentage == 100 ? TextKey.SystemControl_BatteryCharged : TextKey.SystemControl_BatteryCharging);
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infoShown = false;
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warningShown = false;
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}
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else
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{
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var hours = SystemInformation.PowerStatus.BatteryLifeRemaining / 3600;
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var minutes = (SystemInformation.PowerStatus.BatteryLifeRemaining - (hours * 3600)) / 60;
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HandleBatteryStatus(status);
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tooltip = text.Get(TextKey.SystemControl_BatteryRemainingCharge);
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tooltip = tooltip.Replace("%%HOURS%%", hours.ToString());
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tooltip = tooltip.Replace("%%MINUTES%%", minutes.ToString());
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}
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tooltip = tooltip.Replace("%%CHARGE%%", percentage.ToString());
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foreach (var control in controls)
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{
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control.SetBatteryCharge(charge, status);
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control.SetPowerGridConnection(online);
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control.SetInformation(tooltip);
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}
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}
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private void HandleBatteryStatus(BatteryChargeStatus status)
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{
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if (status == BatteryChargeStatus.Low && !infoShown)
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{
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foreach (var control in controls)
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{
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control.ShowLowBatteryInfo(text.Get(TextKey.SystemControl_BatteryChargeLowInfo));
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}
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infoShown = true;
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logger.Info("Informed the user about low battery charge.");
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}
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if (status == BatteryChargeStatus.Critical && !warningShown)
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{
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foreach (var control in controls)
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{
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control.ShowCriticalBatteryWarning(text.Get(TextKey.SystemControl_BatteryChargeCriticalWarning));
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}
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warningShown = true;
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logger.Warn("Warned the user about critical battery charge.");
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}
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}
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}
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}
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