Restore SEBPatch

SafeExamBrowser.Client/Operations/ClipboardOperation.cs

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+/*
+ * 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;
+
+namespace SafeExamBrowser.Client.Operations
+{
+	internal class ClipboardOperation : ClientOperation
+	{
+		private readonly IClipboard clipboard;
+		private readonly ILogger logger;
+
+		public override event ActionRequiredEventHandler ActionRequired { add { } remove { } }
+		public override event StatusChangedEventHandler StatusChanged;
+
+		public ClipboardOperation(ClientContext context, IClipboard clipboard, ILogger logger) : base(context)
+		{
+			this.clipboard = clipboard;
+			this.logger = logger;
+		}
+
+		public override OperationResult Perform()
+		{
+			InitializeClipboard();
+
+			return OperationResult.Success;
+		}
+
+		public override OperationResult Revert()
+		{
+			FinalizeClipboard();
+
+			return OperationResult.Success;
+		}
+
+		private void InitializeClipboard()
+		{
+			logger.Info("Initializing clipboard...");
+			StatusChanged?.Invoke(TextKey.OperationStatus_InitializeClipboard);
+			clipboard.Initialize(Context.Settings.Security.ClipboardPolicy);
+		}
+
+		private void FinalizeClipboard()
+		{
+			logger.Info("Finalizing clipboard...");
+			StatusChanged?.Invoke(TextKey.OperationStatus_FinalizeClipboard);
+			clipboard.Terminate();
+		}
+	}
+}