feature: add added/removed line counts to diff view (#2194)

Author: geviraydev

src/Commands/Diff.cs

@@ -194,6 +194,7 @@ private void ParseLine(string line)
                         return;
                     }
 
+                    _result.TextDiff.DeletedLines++;
                     _last = new Models.TextDiffLine(Models.TextDiffLineType.Deleted, line.Substring(1), _oldLine, 0);
                     _deleted.Add(_last);
                     _oldLine++;
@@ -207,6 +208,7 @@ private void ParseLine(string line)
                         return;
                     }
 
+                    _result.TextDiff.AddedLines++;
                     _last = new Models.TextDiffLine(Models.TextDiffLineType.Added, line.Substring(1), 0, _newLine);
                     _added.Add(_last);
                     _newLine++;

src/Models/DiffResult.cs

@@ -55,6 +55,8 @@ public partial class TextDiff
     {
         public List<TextDiffLine> Lines { get; set; } = new List<TextDiffLine>();
         public int MaxLineNumber = 0;
+        public int AddedLines { get; set; } = 0;
+        public int DeletedLines { get; set; } = 0;
 
         public TextDiffSelection MakeSelection(int startLine, int endLine, bool isCombined, bool isOldSide)
         {

src/ViewModels/TextDiffContext.cs

@@ -28,6 +28,8 @@ public class TextDiffContext : ObservableObject
     {
         public Models.DiffOption Option => _option;
         public Models.TextDiff Data => _data;
+        public int AddedLines => _data?.AddedLines ?? 0;
+        public int DeletedLines => _data?.DeletedLines ?? 0;
 
         public Vector ScrollOffset
         {

src/Views/DiffView.axaml

@@ -67,7 +67,29 @@
             <ContentControl Content="{Binding Content, Mode=OneWay}" IsVisible="{Binding IsTextDiff}">
               <ContentControl.DataTemplates>
                 <DataTemplate DataType="vm:TextDiffContext">
-                  <TextBlock Margin="0,0,0,0" FontSize="11" Text="{Binding BlockNavigation.Indicator}"/>
+                  <StackPanel Orientation="Horizontal" Spacing="6" VerticalAlignment="Center">
+                    <TextBlock Margin="0,0,0,0" FontSize="11" Text="{Binding BlockNavigation.Indicator}"/>
+                    <Border Height="16"
+                            Background="{DynamicResource Brush.Diff.AddedBG}"
+                            CornerRadius="8"
+                            VerticalAlignment="Center"
+                            IsVisible="{Binding AddedLines, Converter={x:Static c:IntConverters.IsGreaterThanZero}}">
+                      <TextBlock FontSize="10"
+                                 Margin="8,0"
+                                 Foreground="{DynamicResource Brush.FG1}"
+                                 Text="{Binding AddedLines, StringFormat=+{0}}"/>
+                    </Border>
+                    <Border Height="16"
+                            Background="{DynamicResource Brush.Diff.DeletedBG}"
+                            CornerRadius="8"
+                            VerticalAlignment="Center"
+                            IsVisible="{Binding DeletedLines, Converter={x:Static c:IntConverters.IsGreaterThanZero}}">
+                      <TextBlock FontSize="10"
+                                 Margin="8,0"
+                                 Foreground="{DynamicResource Brush.FG1}"
+                                 Text="{Binding DeletedLines, StringFormat=-{0}}"/>
+                    </Border>
+                  </StackPanel>
                 </DataTemplate>
               </ContentControl.DataTemplates>
             </ContentControl>