Import the source code for Window Walker (#1177)

Import the codebase for Window Walker 

- Not loaded into the module list 
- Not added it to the installer list.

src/modules/windowwalker/app/Window Walker/WindowSearchResultToXamlConverter.cs

@@ -0,0 +1,99 @@
+// 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.  Code forked from Betsegaw Tadele's https://github.com/betsegaw/windowwalker/
+
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Security;
+using System.Windows.Data;
+using System.Windows.Markup;
+using System.Xml;
+using WindowWalker.Components;
+
+namespace WindowWalker
+{
+    /// <summary>
+    /// Converts a string containing valid XAML into WPF objects.
+    /// </summary>
+    [ValueConversion(typeof(SearchResult), typeof(object))]
+    public sealed class WindowSearchResultToXamlConverter : IValueConverter
+    {
+        /// <summary>
+        /// Converts a string containing valid XAML into WPF objects.
+        /// </summary>
+        /// <param name="value">The string to convert.</param>
+        /// <param name="targetType">This parameter is not used.</param>
+        /// <param name="parameter">This parameter is not used.</param>
+        /// <param name="culture">This parameter is not used.</param>
+        /// <returns>A WPF object.</returns>
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is SearchResult input)
+            {
+                string withTags;
+
+                if (input.BestScoreSource == SearchResult.TextType.ProcessName)
+                {
+                    withTags = input.Result.Title;
+                    withTags += $" ({InsertHighlightTags(input.Result.ProcessName, input.SearchMatchesInProcessName)})";
+                }
+                else
+                {
+                    withTags = InsertHighlightTags(input.Result.Title, input.SearchMatchesInTitle);
+                    withTags += $" ({input.Result.ProcessName})";
+                }
+
+                withTags = SecurityElement.Escape(withTags);
+
+                withTags = withTags.Replace("[[", "<Run Background=\"{DynamicResource SecondaryAccentBrush}\" FontSize=\"18\" FontWeight=\"Bold\" Foreground=\"{DynamicResource SecondaryAccentForegroundBrush}\">").
+                                    Replace("]]", "</Run>");
+
+                string wrappedInput = string.Format("<TextBlock xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" TextWrapping=\"Wrap\">{0}</TextBlock>", withTags);
+
+                using (StringReader stringReader = new StringReader(wrappedInput))
+                {
+                    using (XmlReader xmlReader = XmlReader.Create(stringReader))
+                    {
+                        return XamlReader.Load(xmlReader);
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        /// <summary>
+        /// Converts WPF framework objects into a XAML string.
+        /// </summary>
+        /// <param name="value">The WPF Famework object to convert.</param>
+        /// <param name="targetType">This parameter is not used.</param>
+        /// <param name="parameter">This parameter is not used.</param>
+        /// <param name="culture">This parameter is not used.</param>
+        /// <returns>A string containg XAML.</returns>
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException("This converter cannot be used in two-way binding.");
+        }
+
+        private string InsertHighlightTags(string content, List<int> indexes)
+        {
+            int offset = 0;
+            var result = content.Replace("[[", "**").Replace("]]", "**");
+
+            string startTag = "[[";
+            string stopTag = "]]";
+
+            foreach (var index in indexes)
+            {
+                result = result.Insert(index + offset, startTag);
+                result = result.Insert(index + offset + startTag.Length + 1, stopTag);
+
+                offset += startTag.Length + stopTag.Length;
+            }
+
+            return result;
+        }
+    }
+}