first commit

Nitrox.Launcher/Models/Converters/TextBoxPaddingToMarginConverter.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Globalization;
+using Avalonia;
+
+namespace Nitrox.Launcher.Models.Converters;
+
+/// <summary>
+///     Formats the bound value as "0 BoundValue 0 BoundValue" Margin from a Padding, used for TextBox styling.
+/// </summary>
+/// <remarks>
+///     This converter is used to solve a niche issue with the styling of TextBoxes.
+/// </remarks>
+public class TextBoxPaddingToMarginConverter : Converter<TextBoxPaddingToMarginConverter>
+{
+    public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        if (value is not Thickness padding)
+        {
+            return value;
+        }
+        bool isNegative = parameter != null && bool.TryParse(parameter.ToString(), out bool result) && result;
+        double top = isNegative ? -padding.Top : padding.Top;
+        double bottom = isNegative ? -padding.Bottom : padding.Bottom;
+        return new Thickness(0, top, 0, bottom);
+    }
+
+    public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}