chore: add attribution to ResourceNameToResourceStringConverter

Screenbox/Converters/ResourceNameToResourceStringConverter.cs

@@ -1,52 +1,59 @@
-using System;
+#nullable enable
+
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+// Source: https://github.com/CommunityToolkit/Windows/blob/v8.2.250402/components/Converters/src/ResourceNameToResourceStringConverter.cs
+
+using System;
 using Windows.ApplicationModel.Resources;
 using Windows.UI.Xaml.Data;
 
-namespace Screenbox.Converters
+namespace Screenbox.Converters;
+
+/// <summary>
+/// Value converter that looks up for the source string in the App Resources strings and returns its value, if found.
+/// </summary>
+public sealed class ResourceNameToResourceStringConverter : IValueConverter
 {
+    private readonly ResourceLoader _resourceLoader = ResourceLoader.GetForViewIndependentUse();
+
     /// <summary>
-    /// Value converter that look up for the source string in the App Resources strings and returns its value, if found.
+    /// Take the source string as a resource name that will be looked up in the App Resources.
+    /// If the resource exists, the value is returned; otherwise, an empty string is returned.
     /// </summary>
-    public sealed class ResourceNameToResourceStringConverter : IValueConverter
+    /// <param name="value">The source string being passed to the target.</param>
+    /// <param name="targetType">The type of the target property, as a type reference.</param>
+    /// <param name="parameter">Optional parameter. Not used.</param>
+    /// <param name="language">The language of the conversion.</param>
+    /// <returns>The string corresponding to the resource name.</returns>
+    public object? Convert(object? value, Type targetType, object parameter, string language)
     {
-        private readonly ResourceLoader _resourceLoader = ResourceLoader.GetForViewIndependentUse();
-
-        /// <summary>
-        /// Take the source string as a resource name that will be looked up in the App Resources.
-        /// If the resource exists, the value is returned, otherwise.
-        /// </summary>
-        /// <param name="value">The source string being passed to the target.</param>
-        /// <param name="targetType">The type of the target property, as a type reference.</param>
-        /// <param name="parameter">Optional parameter. Not used.</param>
-        /// <param name="language">The language of the conversion.</param>
-        /// <returns>The string corresponding to the resource name.</returns>
-        public object Convert(object? value, Type targetType, object parameter, string language)
+        string? stringValue = value?.ToString();
+        if (stringValue is null)
         {
-            if (value == null)
-            {
-                return string.Empty;
-            }
-
-            string str = (string)value;
-            if (str.StartsWith('#') || str.StartsWith('?'))
-            {
-                return str.Substring(1);
-            }
-
-            return _resourceLoader.GetString(value.ToString());
+            return string.Empty;
         }
 
-        /// <summary>
-        /// Not implemented.
-        /// </summary>
-        /// <param name="value">The source string being passed to the target.</param>
-        /// <param name="targetType">The type of the target property, as a type reference.</param>
-        /// <param name="parameter">Optional parameter. Not used.</param>
-        /// <param name="language">The language of the conversion.</param>
-        /// <returns>The value to be passed to the target dependency property.</returns>
-        public object ConvertBack(object value, Type targetType, object parameter, string language)
+        // This logic was added to handle resource names prefixed with '#' or '?'.
+        if (stringValue.StartsWith('#') || stringValue.StartsWith('?'))
         {
-            throw new NotImplementedException();
+            return stringValue.Substring(1);
         }
+
+        return _resourceLoader.GetString(stringValue);
+    }
+
+    /// <summary>
+    /// Not implemented.
+    /// </summary>
+    /// <param name="value">The source string being passed to the target.</param>
+    /// <param name="targetType">The type of the target property, as a type reference.</param>
+    /// <param name="parameter">Optional parameter. Not used.</param>
+    /// <param name="language">The language of the conversion.</param>
+    /// <returns>The value to be passed to the target dependency property.</returns>
+    public object ConvertBack(object value, Type targetType, object parameter, string language)
+    {
+        throw new NotImplementedException();
     }
 }