first commit

Nitrox.Launcher/Models/Converters/Converter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Globalization;
+using Avalonia.Data.Converters;
+using Avalonia.Markup.Xaml;
+
+namespace Nitrox.Launcher.Models.Converters;
+
+/// <summary>
+///     A converter base class that provides itself as value to the XAML compiler.
+/// </summary>
+public abstract class Converter<TSelf> : MarkupExtension, IValueConverter
+    where TSelf : Converter<TSelf>, new()
+{
+    private static TSelf Instance { get; } = new();
+
+    public sealed override object ProvideValue(IServiceProvider serviceProvider) => Instance;
+
+    public abstract object Convert(object value, Type targetType, object parameter, CultureInfo culture);
+
+    public virtual object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new NotSupportedException();
+}