Add highlight converter component

Wox/Converters/HighlightTextConverter.cs

@@ -0,0 +1,53 @@
+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;
+
+namespace Wox.Converters
+{
+    public class HighlightTextConverter : IMultiValueConverter
+    {
+        public object Convert(object[] value, Type targetType, object parameter, CultureInfo cultureInfo)
+        {
+            var text = value[0] as string;
+            var highlightData = value[1] as List<int>;
+
+            var textBlock = new Span();
+
+            if (highlightData == null || !highlightData.Any())
+            {
+                // No highlight data, just return the text
+                return new Run(text);
+            }
+
+            for (var i = 0; i < text.Length; i++)
+            {
+                var currentCharacter = text.Substring(i, 1);
+                if (this.ShouldHighlight(highlightData, i))
+                {
+                    textBlock.Inlines.Add(new Bold(new Run(currentCharacter)));
+                }
+                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 bool ShouldHighlight(List<int> highlightData, int index)
+        {
+            return highlightData.Contains(index);
+        }
+    }
+}

Wox/ResultListBox.xaml

@@ -4,6 +4,7 @@
          xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
          xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
          xmlns:vm="clr-namespace:Wox.ViewModel"
+         xmlns:converter="clr-namespace:Wox.Converters"
          mc:Ignorable="d" d:DesignWidth="100" d:DesignHeight="100"
          d:DataContext="{d:DesignInstance vm:ResultsViewModel}"
          MaxHeight="{Binding MaxHeight}"
@@ -30,6 +31,9 @@
                 <Button.Content>
                     <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="5"
                           Cursor="Hand" UseLayoutRounding="False">
+                        <Grid.Resources>
+                            <converter:HighlightTextConverter x:Key="HighlightTextConverter"/>
+                        </Grid.Resources>
                         <Grid.ColumnDefinitions>
                             <ColumnDefinition Width="32" />
                             <ColumnDefinition />
@@ -44,9 +48,23 @@
                             </Grid.RowDefinitions>
                             <TextBlock Style="{DynamicResource ItemTitleStyle}" DockPanel.Dock="Left"
                                        VerticalAlignment="Center" ToolTip="{Binding Result.Title}" x:Name="Title"
-                                       Text="{Binding Result.Title}" />
+                                       Text="{Binding Result.Title}">
+                                <vm:ResultsViewModel.FormattedText>
+                                    <MultiBinding Converter="{StaticResource HighlightTextConverter}">
+                                        <Binding Path="Result.Title" />
+                                        <Binding Path="Result.TitleHighlightData" />
+                                    </MultiBinding>
+                                </vm:ResultsViewModel.FormattedText>
+                            </TextBlock>
                             <TextBlock Style="{DynamicResource ItemSubTitleStyle}" ToolTip="{Binding Result.SubTitle}"
-                                       Grid.Row="1" x:Name="SubTitle" Text="{Binding Result.SubTitle}" />
+                                       Grid.Row="1" x:Name="SubTitle" Text="{Binding Result.SubTitle}">
+                                <vm:ResultsViewModel.FormattedText>
+                                    <MultiBinding Converter="{StaticResource HighlightTextConverter}">
+                                        <Binding Path="Result.SubTitle" />
+                                        <Binding Path="Result.SubTitleHighlightData" />
+                                    </MultiBinding>
+                                </vm:ResultsViewModel.FormattedText>
+                            </TextBlock>
                         </Grid>
                     </Grid>
                 </Button.Content>

Wox/ViewModel/RelayCommand.cs

@@ -5,7 +5,6 @@ namespace Wox.ViewModel
 {
     public class RelayCommand : ICommand
     {
-
         private Action<object> _action;
 
         public RelayCommand(Action<object> action)

Wox/ViewModel/ResultsViewModel.cs

@@ -3,7 +3,9 @@ using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Linq;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Data;
+using System.Windows.Documents;
 using Wox.Infrastructure.UserSettings;
 using Wox.Plugin;
 
@@ -193,8 +195,37 @@ namespace Wox.ViewModel
 
             return results;
         }
+        #endregion
 
+        #region FormattedText Dependency Property
+        public static readonly DependencyProperty FormattedTextProperty = DependencyProperty.RegisterAttached(
+            "FormattedText",
+            typeof(Inline),
+            typeof(ResultsViewModel),
+            new PropertyMetadata(null, FormattedTextPropertyChanged));
 
+        public static void SetFormattedText(DependencyObject textBlock, IList<int> value)
+        {
+            textBlock.SetValue(FormattedTextProperty, value);
+        }
+
+        public static Inline GetFormattedText(DependencyObject textBlock)
+        {
+            return (Inline)textBlock.GetValue(FormattedTextProperty);
+        }
+
+        private static void FormattedTextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var textBlock = d as TextBlock;
+            if (textBlock == null) return;
+
+            var inline = (Inline)e.NewValue;
+
+            textBlock.Inlines.Clear();
+            if (inline == null) return;
+
+            textBlock.Inlines.Add(inline);
+        }
         #endregion
 
         public class ResultCollection : ObservableCollection<ResultViewModel>

Wox/Wox.csproj

@@ -158,6 +158,7 @@
     <Compile Include="..\SolutionAssemblyInfo.cs">
       <Link>Properties\SolutionAssemblyInfo.cs</Link>
     </Compile>
+    <Compile Include="Converters\HighlightTextConverter.cs" />
     <Compile Include="Helper\SingletonWindowOpener.cs" />
     <Compile Include="PublicAPIInstance.cs" />
     <Compile Include="ReportWindow.xaml.cs" />