Restore SEBPatch

SafeExamBrowser.Client/Operations/DisplayMonitorOperation.cs

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2024 ETH Zürich, IT Services
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using SafeExamBrowser.Core.Contracts.OperationModel;
+using SafeExamBrowser.Core.Contracts.OperationModel.Events;
+using SafeExamBrowser.I18n.Contracts;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Monitoring.Contracts.Display;
+using SafeExamBrowser.UserInterface.Contracts.Shell;
+
+namespace SafeExamBrowser.Client.Operations
+{
+	internal class DisplayMonitorOperation : ClientOperation
+	{
+		private readonly IDisplayMonitor displayMonitor;
+		private readonly ILogger logger;
+		private readonly ITaskbar taskbar;
+
+		public override event ActionRequiredEventHandler ActionRequired { add { } remove { } }
+		public override event StatusChangedEventHandler StatusChanged;
+
+		public DisplayMonitorOperation(ClientContext context, IDisplayMonitor displayMonitor, ILogger logger, ITaskbar taskbar) : base(context)
+		{
+			this.displayMonitor = displayMonitor;
+			this.logger = logger;
+			this.taskbar = taskbar;
+		}
+
+		public override OperationResult Perform()
+		{
+			logger.Info("Initializing working area...");
+			StatusChanged?.Invoke(TextKey.OperationStatus_InitializeWorkingArea);
+
+			displayMonitor.InitializePrimaryDisplay(Context.Settings.UserInterface.Taskbar.EnableTaskbar ? taskbar.GetAbsoluteHeight() : 0);
+			displayMonitor.StartMonitoringDisplayChanges();
+
+			return OperationResult.Success;
+		}
+
+		public override OperationResult Revert()
+		{
+			logger.Info("Restoring working area...");
+			StatusChanged?.Invoke(TextKey.OperationStatus_RestoreWorkingArea);
+
+			displayMonitor.StopMonitoringDisplayChanges();
+			displayMonitor.ResetPrimaryDisplay();
+
+			return OperationResult.Success;
+		}
+	}
+}