[Run] Highlight search text (#11635)

* Add bolded type

* Inline get set

* Fix

* Update expect.txt

IMulti

Co-authored-by: Niels Laute <niels9001@hotmail.com>
Co-authored-by: Clint Rutkas <clint@rutkas.com>

src/modules/launcher/PowerLauncher/Converters/HighlightTextConverter.cs

@@ -0,0 +1,64 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Media;
+
+namespace PowerLauncher.Converters
+{
+    public class HighlightTextConverter : IMultiValueConverter
+    {
+        public object Convert(object[] value, Type targetType, object parameter, CultureInfo cultureInfo)
+        {
+#pragma warning disable CA1062 // Validate arguments of public methods
+            var text = value[0] as string;
+#pragma warning restore CA1062 // Validate arguments of public methods
+            var highlightData = value[1] as List<int>;
+            var selected = value[2] as bool? == true;
+
+            if (highlightData == null || !highlightData.Any())
+            {
+                // No highlight data, just return the text
+                return new Run(text);
+            }
+
+            var textBlock = new Span();
+            for (var i = 0; i < text.Length; i++)
+            {
+                var currentCharacter = text.Substring(i, 1);
+                if (ShouldHighlight(highlightData, i))
+                {
+                    textBlock.Inlines.Add(new Run(currentCharacter)
+                    {
+                        FontWeight = FontWeights.SemiBold,
+                    });
+                }
+                else
+                {
+                    textBlock.Inlines.Add(new Run(currentCharacter));
+                }
+            }
+
+            return textBlock;
+        }
+
+        public object[] ConvertBack(object value, Type[] targetType, object parameter, CultureInfo culture)
+        {
+            return new[] { DependencyProperty.UnsetValue, DependencyProperty.UnsetValue };
+        }
+
+        private static bool ShouldHighlight(List<int> highlightData, int index)
+        {
+            return highlightData.Contains(index);
+        }
+    }
+}