Restore SEBPatch

SafeExamBrowser.Monitoring.Contracts/Display/Events/DisplayChangedEventHandler.cs

@@ -0,0 +1,15 @@
+/*
+ * 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/.
+ */
+
+namespace SafeExamBrowser.Monitoring.Contracts.Display.Events
+{
+	/// <summary>
+	/// Indicates that the configuration of a display has changed.
+	/// </summary>
+	public delegate void DisplayChangedEventHandler();
+}

SafeExamBrowser.Monitoring.Contracts/Display/IDisplayMonitor.cs

@@ -0,0 +1,49 @@
+/*
+ * 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.Monitoring.Contracts.Display.Events;
+using SafeExamBrowser.Settings.Monitoring;
+
+namespace SafeExamBrowser.Monitoring.Contracts.Display
+{
+	/// <summary>
+	/// Monitors the displays of the computer for changes and provides access to display-related functionality.
+	/// </summary>
+	public interface IDisplayMonitor
+	{
+		/// <summary>
+		/// Event fired when the primary display or its settings have changed.
+		/// </summary>
+		event DisplayChangedEventHandler DisplayChanged;
+
+		/// <summary>
+		/// Sets the desktop working area to accommodate to the taskbar's height and removes the configured wallpaper (if possible).
+		/// </summary>
+		void InitializePrimaryDisplay(int taskbarHeight);
+
+		/// <summary>
+		/// Resets the desktop working area and wallpaper to their previous (initial) state.
+		/// </summary>
+		void ResetPrimaryDisplay();
+
+		/// <summary>
+		/// Starts monitoring for display changes, i.e. display changes will trigger the <c>DisplaySettingsChanged</c> event.
+		/// </summary>
+		void StartMonitoringDisplayChanges();
+
+		/// <summary>
+		/// Stops monitoring for display changes.
+		/// </summary>
+		void StopMonitoringDisplayChanges();
+
+		/// <summary>
+		/// Validates the currently active display configuration according to the given settings.
+		/// </summary>
+		ValidationResult ValidateConfiguration(DisplaySettings settings);
+	}
+}

SafeExamBrowser.Monitoring.Contracts/Display/ValidationResult.cs

@@ -0,0 +1,31 @@
+/*
+ * 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/.
+ */
+
+namespace SafeExamBrowser.Monitoring.Contracts.Display
+{
+	/// <summary>
+	/// Provides the result of a display configuration validation.
+	/// </summary>
+	public class ValidationResult
+	{
+		/// <summary>
+		/// Specifies the count of external displays detected.
+		/// </summary>
+		public int ExternalDisplays { get; set; }
+
+		/// <summary>
+		/// Specifies the count of internal displays detected.
+		/// </summary>
+		public int InternalDisplays { get; set; }
+
+		/// <summary>
+		/// Indicates whether the active display configuration is allowed.
+		/// </summary>
+		public bool IsAllowed { get; set; }
+	}
+}