refactor: rewrite TextDiffView

src/Resources/Themes.axaml

@@ -25,11 +25,11 @@
       <Color x:Key="Color.FG1">#FF1F1F1F</Color>
       <Color x:Key="Color.FG2">#FF6F6F6F</Color>
       <Color x:Key="Color.FG3">#FFFFFFFF</Color>
-      <Color x:Key="Color.TextDiffView.LineBG1.EMPTY">#3C000000</Color>
+      <Color x:Key="Color.Diff.EmptyBG">#3C000000</Color>
-      <Color x:Key="Color.TextDiffView.LineBG1.ADD">#3C00FF00</Color>
+      <Color x:Key="Color.Diff.AddedBG">#3C00FF00</Color>
-      <Color x:Key="Color.TextDiffView.LineBG1.DELETED">#3CFF0000</Color>
+      <Color x:Key="Color.Diff.DeletedBG">#3CFF0000</Color>
-      <Color x:Key="Color.TextDiffView.LineBG2.ADD">#5A00FF00</Color>
+      <Color x:Key="Color.Diff.AddedHighlight">#5A00FF00</Color>
-      <Color x:Key="Color.TextDiffView.LineBG2.DELETED">#50FF0000</Color>
+      <Color x:Key="Color.Diff.DeletedHighlight">#50FF0000</Color>
     </ResourceDictionary>
 
     <ResourceDictionary x:Key="Dark">
@@ -56,11 +56,11 @@
       <Color x:Key="Color.FG1">#FFDDDDDD</Color>
       <Color x:Key="Color.FG2">#40F1F1F1</Color>
       <Color x:Key="Color.FG3">#FF252525</Color>
-      <Color x:Key="Color.TextDiffView.LineBG1.EMPTY">#3C000000</Color>
+      <Color x:Key="Color.Diff.EmptyBG">#3C000000</Color>
-      <Color x:Key="Color.TextDiffView.LineBG1.ADD">#3C00FF00</Color>
+      <Color x:Key="Color.Diff.AddedBG">#3C00FF00</Color>
-      <Color x:Key="Color.TextDiffView.LineBG1.DELETED">#3CFF0000</Color>
+      <Color x:Key="Color.Diff.DeletedBG">#3CFF0000</Color>
-      <Color x:Key="Color.TextDiffView.LineBG2.ADD">#5A00FF00</Color>
+      <Color x:Key="Color.Diff.AddedHighlight">#5A00FF00</Color>
-      <Color x:Key="Color.TextDiffView.LineBG2.DELETED">#50FF0000</Color>
+      <Color x:Key="Color.Diff.DeletedHighlight">#50FF0000</Color>
     </ResourceDictionary>
   </ResourceDictionary.ThemeDictionaries>
 
@@ -89,9 +89,9 @@
   <SolidColorBrush x:Key="Brush.FG3" Color="{DynamicResource Color.FG3}"/>
   <SolidColorBrush x:Key="Brush.Accent" Color="{DynamicResource SystemAccentColor}"/>
   <SolidColorBrush x:Key="Brush.AccentHovered" Color="{DynamicResource SystemListLowColor}"/>
-  <SolidColorBrush x:Key="Brush.TextDiffView.LineBG1.EMPTY" Color="{DynamicResource Color.TextDiffView.LineBG1.EMPTY}"/>
+  <SolidColorBrush x:Key="Brush.Diff.EmptyBG" Color="{DynamicResource Color.Diff.EmptyBG}"/>
-  <SolidColorBrush x:Key="Brush.TextDiffView.LineBG1.ADD" Color="{DynamicResource Color.TextDiffView.LineBG1.ADD}"/>
+  <SolidColorBrush x:Key="Brush.Diff.AddedBG" Color="{DynamicResource Color.Diff.AddedBG}"/>
-  <SolidColorBrush x:Key="Brush.TextDiffView.LineBG1.DELETED" Color="{DynamicResource Color.TextDiffView.LineBG1.DELETED}"/>
+  <SolidColorBrush x:Key="Brush.Diff.DeletedBG" Color="{DynamicResource Color.Diff.DeletedBG}"/>
-  <SolidColorBrush x:Key="Brush.TextDiffView.LineBG2.ADD" Color="{DynamicResource Color.TextDiffView.LineBG2.ADD}"/>
+  <SolidColorBrush x:Key="Brush.Diff.AddedHighlight" Color="{DynamicResource Color.Diff.AddedHighlight}"/>
-  <SolidColorBrush x:Key="Brush.TextDiffView.LineBG2.DELETED" Color="{DynamicResource Color.TextDiffView.LineBG2.DELETED}"/>
+  <SolidColorBrush x:Key="Brush.Diff.DeletedHighlight" Color="{DynamicResource Color.Diff.DeletedHighlight}"/>
 </ResourceDictionary>

src/ViewModels/TwoSideTextDiff.cs

@@ -1,5 +1,5 @@
 using System.Collections.Generic;
-
+using Avalonia;
 using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace SourceGit.ViewModels
@@ -11,7 +11,13 @@ namespace SourceGit.ViewModels
         public List<Models.TextDiffLine> New { get; set; } = new List<Models.TextDiffLine>();
         public int MaxLineNumber = 0;
 
-        public TwoSideTextDiff(Models.TextDiff diff)
+        public Vector SyncScrollOffset
+        {
+            get => _syncScrollOffset;
+            set => SetProperty(ref _syncScrollOffset, value);
+        }
+
+        public TwoSideTextDiff(Models.TextDiff diff, TwoSideTextDiff previous = null)
         {
             File = diff.File;
             MaxLineNumber = diff.MaxLineNumber;
@@ -35,6 +41,9 @@ namespace SourceGit.ViewModels
             }
 
             FillEmptyLines();
+
+            if (previous != null && previous.File == File)
+                _syncScrollOffset = previous._syncScrollOffset;
         }
 
         private void FillEmptyLines()
@@ -52,5 +61,7 @@ namespace SourceGit.ViewModels
                     New.Add(new Models.TextDiffLine());
             }
         }
+
+        private Vector _syncScrollOffset = Vector.Zero;
     }
 }

src/ViewModels/WorkingCopy.cs

@@ -379,27 +379,19 @@ namespace SourceGit.ViewModels
                 if (isUnstaged)
                 {
                     if (changes.Count == _unstaged.Count && _staged.Count == 0)
-                    {
                         PopupHost.ShowPopup(new Discard(_repo));
-                    }
                     else
-                    {
                         PopupHost.ShowPopup(new Discard(_repo, changes, true));
                 }
-                }
                 else
                 {
                     if (changes.Count == _staged.Count && _unstaged.Count == 0)
-                    {
                         PopupHost.ShowPopup(new Discard(_repo));
-                    }
                     else
-                    {
                         PopupHost.ShowPopup(new Discard(_repo, changes, false));
                 }
             }
         }
-        }
 
         public void Commit()
         {
@@ -921,24 +913,11 @@ namespace SourceGit.ViewModels
 
             var isUnstaged = _selectedUnstaged != null && _selectedUnstaged.Count > 0;
             if (change == null)
-            {
                 DetailContext = null;
-            }
             else if (change.IsConflit && isUnstaged)
-            {
                 DetailContext = new ConflictContext(_repo.FullPath, change);
-            }
             else
-            {
+                DetailContext = new DiffContext(_repo.FullPath, new Models.DiffOption(change, isUnstaged), _detailContext as DiffContext);
-                if (_detailContext is DiffContext previous)
-                {
-                    DetailContext = new DiffContext(_repo.FullPath, new Models.DiffOption(change, isUnstaged), previous);
-                }
-                else
-                {
-                    DetailContext = new DiffContext(_repo.FullPath, new Models.DiffOption(change, isUnstaged));
-                }
-            }
         }
 
         private async void UseTheirs(List<Models.Change> changes)

src/Views/DiffView.axaml

@@ -234,9 +234,7 @@
 
           <!-- Text Diff -->
           <DataTemplate DataType="m:TextDiff">
-            <v:TextDiffView TextDiff="{Binding}"
+            <v:TextDiffView UseSideBySideDiff="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSideBySideDiff, Mode=OneWay}"/>
-                            SyncScrollOffset="{Binding SyncScrollOffset, Mode=TwoWay}"
-                            UseSideBySideDiff="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSideBySideDiff, Mode=OneWay}"/>
           </DataTemplate>
 
           <!-- Empty or only EOL changes -->

src/Views/TextDiffView.axaml

@@ -11,18 +11,16 @@
              Background="{DynamicResource Brush.Contents}">
   <UserControl.DataTemplates>
     <DataTemplate DataType="m:TextDiff">
-      <v:CombinedTextDiffPresenter BorderBrush="{DynamicResource Brush.Border2}"
+      <v:CombinedTextDiffPresenter FileName="{Binding File}"
-                                   BorderThickness="0"
-                                   LineBGEmpty = "{DynamicResource Brush.TextDiffView.LineBG1.EMPTY}"
-                                   LineBGAdd = "{DynamicResource Brush.TextDiffView.LineBG1.ADD}"
-                                   LineBGDeleted = "{DynamicResource Brush.TextDiffView.LineBG1.DELETED}"
-                                   SecondaryLineBGAdd = "{DynamicResource Brush.TextDiffView.LineBG2.ADD}"
-                                   SecondaryLineBGDeleted = "{DynamicResource Brush.TextDiffView.LineBG2.DELETED}"
                                    Foreground="{DynamicResource Brush.FG1}"
-                                   SecondaryFG="{DynamicResource Brush.FG2}"
+                                   LineBrush="{DynamicResource Brush.Border2}"
+                                   EmptyContentBackground="{DynamicResource Brush.Diff.EmptyBG}"
+                                   AddedContentBackground="{DynamicResource Brush.Diff.AddedBG}"
+                                   DeletedContentBackground="{DynamicResource Brush.Diff.DeletedBG}"
+                                   AddedHighlightBrush="{DynamicResource Brush.Diff.AddedHighlight}"
+                                   DeletedHighlightBrush="{DynamicResource Brush.Diff.DeletedHighlight}"
+                                   IndicatorForeground="{DynamicResource Brush.FG2}"
                                    FontFamily="{Binding Source={x:Static vm:Preference.Instance}, Path=MonospaceFont}"
-                                   DiffData="{Binding}"
-                                   SyncScrollOffset="{Binding #ThisControl.SyncScrollOffset, Mode=TwoWay}"
                                    UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
                                    WordWrap="{Binding Source={x:Static vm:Preference.Instance}, Path=EnableDiffViewWordWrap}"/>
     </DataTemplate>
@@ -30,40 +28,36 @@
     <DataTemplate DataType="vm:TwoSideTextDiff">
       <Grid ColumnDefinitions="*,1,*">
         <v:SingleSideTextDiffPresenter Grid.Column="0"
-                                       SyncScrollOffset="{Binding #ThisControl.SyncScrollOffset, Mode=TwoWay}"
-                                       UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
-                                       WordWrap="{Binding Source={x:Static vm:Preference.Instance}, Path=EnableDiffViewWordWrap}"
                                        IsOld="True"
-                                       BorderBrush="{DynamicResource Brush.Border2}"
+                                       FileName="{Binding File}"
-                                       BorderThickness="0"
-                                       LineBGEmpty = "{DynamicResource Brush.TextDiffView.LineBG1.EMPTY}"
-                                       LineBGAdd = "{DynamicResource Brush.TextDiffView.LineBG1.ADD}"
-                                       LineBGDeleted = "{DynamicResource Brush.TextDiffView.LineBG1.DELETED}"
-                                       SecondaryLineBGAdd = "{DynamicResource Brush.TextDiffView.LineBG2.ADD}"
-                                       SecondaryLineBGDeleted = "{DynamicResource Brush.TextDiffView.LineBG2.DELETED}"
                                        Foreground="{DynamicResource Brush.FG1}"
-                                       SecondaryFG="{DynamicResource Brush.FG2}"
+                                       LineBrush="{DynamicResource Brush.Border2}"
+                                       EmptyContentBackground="{DynamicResource Brush.Diff.EmptyBG}"
+                                       AddedContentBackground="{DynamicResource Brush.Diff.AddedBG}"
+                                       DeletedContentBackground="{DynamicResource Brush.Diff.DeletedBG}"
+                                       AddedHighlightBrush="{DynamicResource Brush.Diff.AddedHighlight}"
+                                       DeletedHighlightBrush="{DynamicResource Brush.Diff.DeletedHighlight}"
+                                       IndicatorForeground="{DynamicResource Brush.FG2}"
                                        FontFamily="{Binding Source={x:Static vm:Preference.Instance}, Path=MonospaceFont}"
-                                       DiffData="{Binding}"/>
+                                       UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
+                                       WordWrap="{Binding Source={x:Static vm:Preference.Instance}, Path=EnableDiffViewWordWrap}"/>
 
         <Rectangle Grid.Column="1" Fill="{DynamicResource Brush.Border2}" Width="1" HorizontalAlignment="Center" VerticalAlignment="Stretch"/>
 
         <v:SingleSideTextDiffPresenter Grid.Column="2"
-                                       SyncScrollOffset="{Binding #ThisControl.SyncScrollOffset, Mode=TwoWay}"
-                                       UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
-                                       WordWrap="{Binding Source={x:Static vm:Preference.Instance}, Path=EnableDiffViewWordWrap}"
                                        IsOld="False"
-                                       BorderBrush="{DynamicResource Brush.Border2}"
+                                       FileName="{Binding File}"
-                                       BorderThickness="0"
-                                       LineBGEmpty = "{DynamicResource Brush.TextDiffView.LineBG1.EMPTY}"
-                                       LineBGAdd = "{DynamicResource Brush.TextDiffView.LineBG1.ADD}"
-                                       LineBGDeleted = "{DynamicResource Brush.TextDiffView.LineBG1.DELETED}"
-                                       SecondaryLineBGAdd = "{DynamicResource Brush.TextDiffView.LineBG2.ADD}"
-                                       SecondaryLineBGDeleted = "{DynamicResource Brush.TextDiffView.LineBG2.DELETED}"
                                        Foreground="{DynamicResource Brush.FG1}"
-                                       SecondaryFG="{DynamicResource Brush.FG2}"
+                                       LineBrush="{DynamicResource Brush.Border2}"
+                                       EmptyContentBackground="{DynamicResource Brush.Diff.EmptyBG}"
+                                       AddedContentBackground="{DynamicResource Brush.Diff.AddedBG}"
+                                       DeletedContentBackground="{DynamicResource Brush.Diff.DeletedBG}"
+                                       AddedHighlightBrush="{DynamicResource Brush.Diff.AddedHighlight}"
+                                       DeletedHighlightBrush="{DynamicResource Brush.Diff.DeletedHighlight}"
+                                       IndicatorForeground="{DynamicResource Brush.FG2}"
                                        FontFamily="{Binding Source={x:Static vm:Preference.Instance}, Path=MonospaceFont}"
-                                       DiffData="{Binding}"/>
+                                       UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
+                                       WordWrap="{Binding Source={x:Static vm:Preference.Instance}, Path=EnableDiffViewWordWrap}"/>
       </Grid>
     </DataTemplate>
   </UserControl.DataTemplates>

src/Views/TextDiffView.axaml.cs

@@ -7,6 +7,7 @@ using System.Text;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
+using Avalonia.Data;
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.Media;
@@ -21,7 +22,161 @@ using AvaloniaEdit.Utils;
 
 namespace SourceGit.Views
 {
-    public class CombinedTextDiffPresenter : TextEditor
+    public class IThemedTextDiffPresenter : TextEditor
+    {
+        public static readonly StyledProperty<string> FileNameProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, string>(nameof(FileName), string.Empty);
+
+        public string FileName
+        {
+            get => GetValue(FileNameProperty);
+            set => SetValue(FileNameProperty, value);
+        }
+
+        public static readonly StyledProperty<IBrush> LineBrushProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(LineBrush), new SolidColorBrush(Colors.DarkGray));
+
+        public IBrush LineBrush
+        {
+            get => GetValue(LineBrushProperty);
+            set => SetValue(LineBrushProperty, value);
+        }
+
+        public static readonly StyledProperty<IBrush> EmptyContentBackgroundProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(EmptyContentBackground), new SolidColorBrush(Color.FromArgb(60, 0, 0, 0)));
+
+        public IBrush EmptyContentBackground
+        {
+            get => GetValue(EmptyContentBackgroundProperty);
+            set => SetValue(EmptyContentBackgroundProperty, value);
+        }
+
+        public static readonly StyledProperty<IBrush> AddedContentBackgroundProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(AddedContentBackground), new SolidColorBrush(Color.FromArgb(60, 0, 255, 0)));
+
+        public IBrush AddedContentBackground
+        {
+            get => GetValue(AddedContentBackgroundProperty);
+            set => SetValue(AddedContentBackgroundProperty, value);
+        }
+
+        public static readonly StyledProperty<IBrush> DeletedContentBackgroundProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(DeletedContentBackground), new SolidColorBrush(Color.FromArgb(60, 255, 0, 0)));
+
+        public IBrush DeletedContentBackground
+        {
+            get => GetValue(DeletedContentBackgroundProperty);
+            set => SetValue(DeletedContentBackgroundProperty, value);
+        }
+
+        public static readonly StyledProperty<IBrush> AddedHighlightBrushProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(AddedHighlightBrush), new SolidColorBrush(Color.FromArgb(90, 0, 255, 0)));
+
+        public IBrush AddedHighlightBrush
+        {
+            get => GetValue(AddedHighlightBrushProperty);
+            set => SetValue(AddedHighlightBrushProperty, value);
+        }
+
+        public static readonly StyledProperty<IBrush> DeletedHighlightBrushProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(DeletedHighlightBrush), new SolidColorBrush(Color.FromArgb(80, 255, 0, 0)));
+
+        public IBrush DeletedHighlightBrush
+        {
+            get => GetValue(DeletedHighlightBrushProperty);
+            set => SetValue(DeletedHighlightBrushProperty, value);
+        }
+
+        public static readonly StyledProperty<IBrush> IndicatorForegroundProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(IndicatorForeground), Brushes.Gray);
+
+        public IBrush IndicatorForeground
+        {
+            get => GetValue(IndicatorForegroundProperty);
+            set => SetValue(IndicatorForegroundProperty, value);
+        }
+
+        public static readonly StyledProperty<bool> UseSyntaxHighlightingProperty =
+            AvaloniaProperty.Register<IThemedTextDiffPresenter, bool>(nameof(UseSyntaxHighlighting), false);
+
+        public bool UseSyntaxHighlighting
+        {
+            get => GetValue(UseSyntaxHighlightingProperty);
+            set => SetValue(UseSyntaxHighlightingProperty, value);
+        }
+
+        protected override Type StyleKeyOverride => typeof(TextEditor);
+
+        public IThemedTextDiffPresenter(TextArea area, TextDocument doc): base(area, doc)
+        {
+            IsReadOnly = true;
+            ShowLineNumbers = false;
+            BorderThickness = new Thickness(0);
+
+            TextArea.TextView.Margin = new Thickness(4, 0);
+            TextArea.TextView.Options.EnableHyperlinks = false;
+            TextArea.TextView.Options.EnableEmailHyperlinks = false;
+        }
+
+        protected override void OnLoaded(RoutedEventArgs e)
+        {
+            base.OnLoaded(e);
+            UpdateTextMate();
+        }
+
+        protected override void OnUnloaded(RoutedEventArgs e)
+        {
+            base.OnUnloaded(e);
+
+            if (_textMate != null)
+            {
+                _textMate.Dispose();
+                _textMate = null;
+            }
+        }
+
+        protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+        {
+            base.OnPropertyChanged(change);
+
+            if (change.Property == UseSyntaxHighlightingProperty)
+                UpdateTextMate();
+            else if (change.Property == FileNameProperty)
+                Models.TextMateHelper.SetGrammarByFileName(_textMate, FileName);
+            else if (change.Property.Name == "ActualThemeVariant" && change.NewValue != null)
+                Models.TextMateHelper.SetThemeByApp(_textMate);
+        }
+
+        protected void UpdateTextMate()
+        {
+            if (UseSyntaxHighlighting)
+            {
+                if (_textMate == null)
+                {
+                    TextArea.TextView.LineTransformers.Remove(_lineStyleTransformer);
+                    _textMate = Models.TextMateHelper.CreateForEditor(this);
+                    TextArea.TextView.LineTransformers.Add(_lineStyleTransformer);
+                    Models.TextMateHelper.SetGrammarByFileName(_textMate, FileName);                        
+                }
+            }
+            else
+            {
+                if (_textMate != null)
+                {
+                    _textMate.Dispose();
+                    _textMate = null;
+                    GC.Collect();
+
+                    TextArea.TextView.Redraw();
+                }
+            }
+        }
+
+        private TextMate.Installation _textMate = null;
+        protected IVisualLineTransformer _lineStyleTransformer = null;
+    }
+
+    public class CombinedTextDiffPresenter : IThemedTextDiffPresenter
     {
         public class LineNumberMargin : AbstractMargin
         {
@@ -104,7 +259,7 @@ namespace SourceGit.Views
 
             public override void Render(DrawingContext context)
             {
-                var pen = new Pen(_editor.BorderBrush, 1);
+                var pen = new Pen(_editor.LineBrush, 1);
                 context.DrawLine(pen, new Point(0, 0), new Point(0, Bounds.Height));
             }
 
@@ -155,11 +310,11 @@ namespace SourceGit.Views
                 switch (type)
                 {
                     case Models.TextDiffLineType.None:
-                        return _editor.LineBGEmpty;
+                        return _editor.EmptyContentBackground;
                     case Models.TextDiffLineType.Added:
-                        return _editor.LineBGAdd;
+                        return _editor.AddedContentBackground;
                     case Models.TextDiffLineType.Deleted:
-                        return _editor.LineBGDeleted;
+                        return _editor.DeletedContentBackground;
                     default:
                         return null;
                 }
@@ -186,7 +341,7 @@ namespace SourceGit.Views
                 {
                     ChangeLinePart(line.Offset, line.EndOffset, v =>
                     {
-                        v.TextRunProperties.SetForegroundBrush(_editor.SecondaryFG);
+                        v.TextRunProperties.SetForegroundBrush(_editor.IndicatorForeground);
                         v.TextRunProperties.SetTypeface(new Typeface(_editor.FontFamily, FontStyle.Italic));
                     });
 
@@ -195,7 +350,7 @@ namespace SourceGit.Views
 
                 if (info.Highlights.Count > 0)
                 {
-                    var bg = info.Type == Models.TextDiffLineType.Added ? _editor.SecondaryLineBGAdd : _editor.SecondaryLineBGDeleted;
+                    var bg = info.Type == Models.TextDiffLineType.Added ? _editor.AddedHighlightBrush : _editor.DeletedHighlightBrush;
                     foreach (var highlight in info.Highlights)
                     {
                         ChangeLinePart(line.Offset + highlight.Start, line.Offset + highlight.Start + highlight.Count, v =>
@@ -209,129 +364,57 @@ namespace SourceGit.Views
             private readonly CombinedTextDiffPresenter _editor;
         }
 
-        public static readonly StyledProperty<Models.TextDiff> DiffDataProperty =
+        public Models.TextDiff DiffData => DataContext as Models.TextDiff;
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, Models.TextDiff>(nameof(DiffData));
-
-        public Models.TextDiff DiffData
-        {
-            get => GetValue(DiffDataProperty);
-            set => SetValue(DiffDataProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> LineBGEmptyProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, IBrush>(nameof(LineBGEmpty), new SolidColorBrush(Color.FromArgb(60, 0, 0, 0)));
-
-        public IBrush LineBGEmpty
-        {
-            get => GetValue(LineBGEmptyProperty);
-            set => SetValue(LineBGEmptyProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> LineBGAddProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, IBrush>(nameof(LineBGAdd), new SolidColorBrush(Color.FromArgb(60, 0, 255, 0)));
-
-        public IBrush LineBGAdd
-        {
-            get => GetValue(LineBGAddProperty);
-            set => SetValue(LineBGAddProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> LineBGDeletedProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, IBrush>(nameof(LineBGDeleted), new SolidColorBrush(Color.FromArgb(60, 255, 0, 0)));
-
-        public IBrush LineBGDeleted
-        {
-            get => GetValue(LineBGDeletedProperty);
-            set => SetValue(LineBGDeletedProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> SecondaryLineBGAddProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, IBrush>(nameof(SecondaryLineBGAdd), new SolidColorBrush(Color.FromArgb(90, 0, 255, 0)));
-
-        public IBrush SecondaryLineBGAdd
-        {
-            get => GetValue(SecondaryLineBGAddProperty);
-            set => SetValue(SecondaryLineBGAddProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> SecondaryLineBGDeletedProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, IBrush>(nameof(SecondaryLineBGDeleted), new SolidColorBrush(Color.FromArgb(80, 255, 0, 0)));
-
-        public IBrush SecondaryLineBGDeleted
-        {
-            get => GetValue(SecondaryLineBGDeletedProperty);
-            set => SetValue(SecondaryLineBGDeletedProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> SecondaryFGProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, IBrush>(nameof(SecondaryFG), Brushes.Gray);
-
-        public IBrush SecondaryFG
-        {
-            get => GetValue(SecondaryFGProperty);
-            set => SetValue(SecondaryFGProperty, value);
-        }
-
-        public static readonly StyledProperty<Vector> SyncScrollOffsetProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, Vector>(nameof(SyncScrollOffset));
-
-        public Vector SyncScrollOffset
-        {
-            get => GetValue(SyncScrollOffsetProperty);
-            set => SetValue(SyncScrollOffsetProperty, value);
-        }
-
-        public static readonly StyledProperty<bool> UseSyntaxHighlightingProperty =
-            AvaloniaProperty.Register<CombinedTextDiffPresenter, bool>(nameof(UseSyntaxHighlighting), false);
-
-        public bool UseSyntaxHighlighting
-        {
-            get => GetValue(UseSyntaxHighlightingProperty);
-            set => SetValue(UseSyntaxHighlightingProperty, value);
-        }
-
-        protected override Type StyleKeyOverride => typeof(TextEditor);
 
         public CombinedTextDiffPresenter() : base(new TextArea(), new TextDocument())
         {
             _lineStyleTransformer = new LineStyleTransformer(this);
 
-            IsReadOnly = true;
-            ShowLineNumbers = false;
-
             TextArea.LeftMargins.Add(new LineNumberMargin(this, true) { Margin = new Thickness(8, 0) });
             TextArea.LeftMargins.Add(new VerticalSeperatorMargin(this));
             TextArea.LeftMargins.Add(new LineNumberMargin(this, false) { Margin = new Thickness(8, 0) });
             TextArea.LeftMargins.Add(new VerticalSeperatorMargin(this));
 
-            TextArea.TextView.Margin = new Thickness(4, 0);
             TextArea.TextView.BackgroundRenderers.Add(new LineBackgroundRenderer(this));
             TextArea.TextView.LineTransformers.Add(_lineStyleTransformer);
-            TextArea.TextView.Options.EnableHyperlinks = false;
+        }
-            TextArea.TextView.Options.EnableEmailHyperlinks = false;
+
+        protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
+        {
+            base.OnApplyTemplate(e);
+
+            var scroller = (ScrollViewer)e.NameScope.Find("PART_ScrollViewer");
+            scroller.Bind(ScrollViewer.OffsetProperty, new Binding("SyncScrollOffset", BindingMode.TwoWay));
         }
 
         protected override void OnLoaded(RoutedEventArgs e)
         {
             base.OnLoaded(e);
-
-            UpdateTextMate();
-
             TextArea.TextView.ContextRequested += OnTextViewContextRequested;
-            TextArea.TextView.ScrollOffsetChanged += OnTextViewScrollOffsetChanged;
         }
 
         protected override void OnUnloaded(RoutedEventArgs e)
         {
             base.OnUnloaded(e);
-
             TextArea.TextView.ContextRequested -= OnTextViewContextRequested;
-            TextArea.TextView.ScrollOffsetChanged -= OnTextViewScrollOffsetChanged;
+        }
 
-            if (_textMate != null)
+        protected override void OnDataContextChanged(EventArgs e)
         {
-                _textMate.Dispose();
+            base.OnDataContextChanged(e);
-                _textMate = null;
+
+            var textDiff = DataContext as Models.TextDiff;
+            if (textDiff != null)
+            {
+                var builder = new StringBuilder();
+                foreach (var line in textDiff.Lines)
+                    builder.AppendLine(line.Content);
+
+                Text = builder.ToString();
+            }
+            else
+            {
+                Text = string.Empty;
             }
 
             GC.Collect();
@@ -346,9 +429,7 @@ namespace SourceGit.Views
             var menu = new ContextMenu();
             var parentView = this.FindAncestorOfType<TextDiffView>();
             if (parentView != null)
-            {
                 parentView.FillContextMenuForWorkingCopyChange(menu, selection.StartPosition.Line, selection.EndPosition.Line, false);
-            }
 
             var copy = new MenuItem();
             copy.Header = App.Text("Copy");
@@ -364,84 +445,9 @@ namespace SourceGit.Views
             TextArea.TextView.OpenContextMenu(menu);
             e.Handled = true;
         }
-
-        private void OnTextViewScrollOffsetChanged(object sender, EventArgs e)
-        {
-            SetCurrentValue(SyncScrollOffsetProperty, TextArea.TextView.ScrollOffset);
     }
 
-        protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+    public class SingleSideTextDiffPresenter : IThemedTextDiffPresenter
-        {
-            base.OnPropertyChanged(change);
-
-            if (change.Property == DiffDataProperty)
-            {
-                if (DiffData != null)
-                {
-                    var builder = new StringBuilder();
-                    foreach (var line in DiffData.Lines)
-                    {
-                        builder.AppendLine(line.Content);
-                    }
-
-                    Text = builder.ToString();
-                    Models.TextMateHelper.SetGrammarByFileName(_textMate, DiffData.File);
-                }
-                else
-                {
-                    Text = string.Empty;
-                }
-            }
-            else if (change.Property == SyncScrollOffsetProperty)
-            {
-                if (TextArea.TextView.ScrollOffset != SyncScrollOffset)
-                {
-                    IScrollable scrollable = TextArea.TextView;
-                    scrollable.Offset = SyncScrollOffset;
-                }
-            }
-            else if (change.Property == UseSyntaxHighlightingProperty)
-            {
-                UpdateTextMate();
-            }
-            else if (change.Property.Name == "ActualThemeVariant" && change.NewValue != null)
-            {
-                Models.TextMateHelper.SetThemeByApp(_textMate);
-            }
-        }
-
-        private void UpdateTextMate()
-        {
-            if (UseSyntaxHighlighting)
-            {
-                if (_textMate == null)
-                {
-                    TextArea.TextView.LineTransformers.Remove(_lineStyleTransformer);
-                    _textMate = Models.TextMateHelper.CreateForEditor(this);
-                    TextArea.TextView.LineTransformers.Add(_lineStyleTransformer);
-
-                    if (DiffData != null)
-                        Models.TextMateHelper.SetGrammarByFileName(_textMate, DiffData.File);
-                }
-            }
-            else
-            {
-                if (_textMate != null)
-                {
-                    _textMate.Dispose();
-                    _textMate = null;
-                    GC.Collect();
-
-                    TextArea.TextView.Redraw();
-                }
-            }
-        }
-
-        private TextMate.Installation _textMate;
-        private readonly LineStyleTransformer _lineStyleTransformer = null;
-    }
-
-    public class SingleSideTextDiffPresenter : TextEditor
     {
         public class LineNumberMargin : AbstractMargin
         {
@@ -523,7 +529,7 @@ namespace SourceGit.Views
 
             public override void Render(DrawingContext context)
             {
-                var pen = new Pen(_editor.BorderBrush, 1);
+                var pen = new Pen(_editor.LineBrush, 1);
                 context.DrawLine(pen, new Point(0, 0), new Point(0, Bounds.Height));
             }
 
@@ -575,11 +581,11 @@ namespace SourceGit.Views
                 switch (type)
                 {
                     case Models.TextDiffLineType.None:
-                        return _editor.LineBGEmpty;
+                        return _editor.EmptyContentBackground;
                     case Models.TextDiffLineType.Added:
-                        return _editor.LineBGAdd;
+                        return _editor.AddedContentBackground;
                     case Models.TextDiffLineType.Deleted:
-                        return _editor.LineBGDeleted;
+                        return _editor.DeletedContentBackground;
                     default:
                         return null;
                 }
@@ -607,7 +613,7 @@ namespace SourceGit.Views
                 {
                     ChangeLinePart(line.Offset, line.EndOffset, v =>
                     {
-                        v.TextRunProperties.SetForegroundBrush(_editor.SecondaryFG);
+                        v.TextRunProperties.SetForegroundBrush(_editor.IndicatorForeground);
                         v.TextRunProperties.SetTypeface(new Typeface(_editor.FontFamily, FontStyle.Italic));
                     });
 
@@ -616,7 +622,7 @@ namespace SourceGit.Views
 
                 if (info.Highlights.Count > 0)
                 {
-                    var bg = info.Type == Models.TextDiffLineType.Added ? _editor.LineBGAdd : _editor.LineBGDeleted;
+                    var bg = info.Type == Models.TextDiffLineType.Added ? _editor.AddedHighlightBrush : _editor.DeletedHighlightBrush;
                     foreach (var highlight in info.Highlights)
                     {
                         ChangeLinePart(line.Offset + highlight.Start, line.Offset + highlight.Start + highlight.Count, v =>
@@ -639,103 +645,16 @@ namespace SourceGit.Views
             set => SetValue(IsOldProperty, value);
         }
 
-        public static readonly StyledProperty<ViewModels.TwoSideTextDiff> DiffDataProperty =
+        public ViewModels.TwoSideTextDiff DiffData => DataContext as ViewModels.TwoSideTextDiff;
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, ViewModels.TwoSideTextDiff>(nameof(DiffData));
-
-        public ViewModels.TwoSideTextDiff DiffData
-        {
-            get => GetValue(DiffDataProperty);
-            set => SetValue(DiffDataProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> LineBGEmptyProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, IBrush>(nameof(LineBGEmpty), new SolidColorBrush(Color.FromArgb(60, 0, 0, 0)));
-
-        public IBrush LineBGEmpty
-        {
-            get => GetValue(LineBGEmptyProperty);
-            set => SetValue(LineBGEmptyProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> LineBGAddProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, IBrush>(nameof(LineBGAdd), new SolidColorBrush(Color.FromArgb(60, 0, 255, 0)));
-
-        public IBrush LineBGAdd
-        {
-            get => GetValue(LineBGAddProperty);
-            set => SetValue(LineBGAddProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> LineBGDeletedProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, IBrush>(nameof(LineBGDeleted), new SolidColorBrush(Color.FromArgb(60, 255, 0, 0)));
-
-        public IBrush LineBGDeleted
-        {
-            get => GetValue(LineBGDeletedProperty);
-            set => SetValue(LineBGDeletedProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> SecondaryLineBGAddProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, IBrush>(nameof(SecondaryLineBGAdd), new SolidColorBrush(Color.FromArgb(90, 0, 255, 0)));
-
-        public IBrush SecondaryLineBGAdd
-        {
-            get => GetValue(SecondaryLineBGAddProperty);
-            set => SetValue(SecondaryLineBGAddProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> SecondaryLineBGDeletedProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, IBrush>(nameof(SecondaryLineBGDeleted), new SolidColorBrush(Color.FromArgb(80, 255, 0, 0)));
-
-        public IBrush SecondaryLineBGDeleted
-        {
-            get => GetValue(SecondaryLineBGDeletedProperty);
-            set => SetValue(SecondaryLineBGDeletedProperty, value);
-        }
-
-        public static readonly StyledProperty<IBrush> SecondaryFGProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, IBrush>(nameof(SecondaryFG), Brushes.Gray);
-
-        public IBrush SecondaryFG
-        {
-            get => GetValue(SecondaryFGProperty);
-            set => SetValue(SecondaryFGProperty, value);
-        }
-
-        public static readonly StyledProperty<Vector> SyncScrollOffsetProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, Vector>(nameof(SyncScrollOffset), Vector.Zero);
-
-        public Vector SyncScrollOffset
-        {
-            get => GetValue(SyncScrollOffsetProperty);
-            set => SetValue(SyncScrollOffsetProperty, value);
-        }
-
-        public static readonly StyledProperty<bool> UseSyntaxHighlightingProperty =
-            AvaloniaProperty.Register<SingleSideTextDiffPresenter, bool>(nameof(UseSyntaxHighlighting), false);
-
-        public bool UseSyntaxHighlighting
-        {
-            get => GetValue(UseSyntaxHighlightingProperty);
-            set => SetValue(UseSyntaxHighlightingProperty, value);
-        }
-
-        protected override Type StyleKeyOverride => typeof(TextEditor);
 
         public SingleSideTextDiffPresenter() : base(new TextArea(), new TextDocument())
         {
             _lineStyleTransformer = new LineStyleTransformer(this);
 
-            IsReadOnly = true;
-            ShowLineNumbers = false;
-
             TextArea.LeftMargins.Add(new LineNumberMargin(this) { Margin = new Thickness(8, 0) });
             TextArea.LeftMargins.Add(new VerticalSeperatorMargin(this));
-            TextArea.TextView.Margin = new Thickness(4, 0);
             TextArea.TextView.BackgroundRenderers.Add(new LineBackgroundRenderer(this));
             TextArea.TextView.LineTransformers.Add(_lineStyleTransformer);
-            TextArea.TextView.Options.EnableHyperlinks = false;
-            TextArea.TextView.Options.EnableEmailHyperlinks = false;
         }
 
         protected override void OnLoaded(RoutedEventArgs e)
@@ -745,12 +664,10 @@ namespace SourceGit.Views
             _scrollViewer = this.FindDescendantOfType<ScrollViewer>();
             if (_scrollViewer != null)
             {
-                _scrollViewer.Offset = SyncScrollOffset;
                 _scrollViewer.ScrollChanged += OnTextViewScrollChanged;
+                _scrollViewer.Bind(ScrollViewer.OffsetProperty, new Binding("SyncScrollOffset", BindingMode.OneWay));
             }
 
-            UpdateTextMate();
-
             TextArea.PointerWheelChanged += OnTextAreaPointerWheelChanged;
             TextArea.TextView.ContextRequested += OnTextViewContextRequested;
         }
@@ -765,18 +682,31 @@ namespace SourceGit.Views
                 _scrollViewer = null;
             }
 
-            if (_textMate != null)
-            {
-                _textMate.Dispose();
-                _textMate = null;
-            }
-
             TextArea.PointerWheelChanged -= OnTextAreaPointerWheelChanged;
             TextArea.TextView.ContextRequested -= OnTextViewContextRequested;
 
             GC.Collect();
         }
 
+        protected override void OnDataContextChanged(EventArgs e)
+        {
+            base.OnDataContextChanged(e);
+
+            if (DataContext is ViewModels.TwoSideTextDiff diff)
+            {
+                var builder = new StringBuilder();
+                var lines = IsOld ? diff.Old : diff.New;
+                foreach (var line in lines)
+                    builder.AppendLine(line.Content);
+
+                Text = builder.ToString();
+            }
+            else
+            {
+                Text = string.Empty;
+            }
+        }
+
         private void OnTextAreaPointerWheelChanged(object sender, PointerWheelEventArgs e)
         {
             if (!TextArea.IsFocused)
@@ -785,8 +715,8 @@ namespace SourceGit.Views
 
         private void OnTextViewScrollChanged(object sender, ScrollChangedEventArgs e)
         {
-            if (TextArea.IsFocused)
+            if (TextArea.IsFocused && DataContext is ViewModels.TwoSideTextDiff diff)
-                SetCurrentValue(SyncScrollOffsetProperty, _scrollViewer.Offset);
+                diff.SyncScrollOffset = _scrollViewer.Offset;
         }
 
         private void OnTextViewContextRequested(object sender, ContextRequestedEventArgs e)
@@ -798,9 +728,7 @@ namespace SourceGit.Views
             var menu = new ContextMenu();
             var parentView = this.FindAncestorOfType<TextDiffView>();
             if (parentView != null)
-            {
                 parentView.FillContextMenuForWorkingCopyChange(menu, selection.StartPosition.Line, selection.EndPosition.Line, IsOld);
-            }
 
             var copy = new MenuItem();
             copy.Header = App.Text("Copy");
@@ -817,96 +745,11 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
-        {
-            base.OnPropertyChanged(change);
-
-            if (change.Property == DiffDataProperty)
-            {
-                if (DiffData != null)
-                {
-                    var builder = new StringBuilder();
-                    if (IsOld)
-                    {
-                        foreach (var line in DiffData.Old)
-                        {
-                            builder.AppendLine(line.Content);
-                        }
-                    }
-                    else
-                    {
-                        foreach (var line in DiffData.New)
-                        {
-                            builder.AppendLine(line.Content);
-                        }
-                    }
-
-                    Text = builder.ToString();
-                    Models.TextMateHelper.SetGrammarByFileName(_textMate, DiffData.File);
-                }
-                else
-                {
-                    Text = string.Empty;
-                }
-            }
-            else if (change.Property == SyncScrollOffsetProperty)
-            {
-                if (!TextArea.IsFocused && _scrollViewer != null)
-                    _scrollViewer.Offset = SyncScrollOffset;
-            }
-            else if (change.Property == UseSyntaxHighlightingProperty)
-            {
-                UpdateTextMate();
-            }
-            else if (change.Property.Name == "ActualThemeVariant" && change.NewValue != null)
-            {
-                Models.TextMateHelper.SetThemeByApp(_textMate);
-            }
-        }
-
-        private void UpdateTextMate()
-        {
-            if (UseSyntaxHighlighting)
-            {
-                if (_textMate == null)
-                {
-                    TextArea.TextView.LineTransformers.Remove(_lineStyleTransformer);
-                    _textMate = Models.TextMateHelper.CreateForEditor(this);
-                    TextArea.TextView.LineTransformers.Add(_lineStyleTransformer);
-
-                    if (DiffData != null)
-                        Models.TextMateHelper.SetGrammarByFileName(_textMate, DiffData.File);
-                }
-            }
-            else
-            {
-                if (_textMate != null)
-                {
-                    _textMate.Dispose();
-                    _textMate = null;
-                    GC.Collect();
-
-                    TextArea.TextView.Redraw();
-                }
-            }
-        }
-
-        private TextMate.Installation _textMate;
-        private readonly LineStyleTransformer _lineStyleTransformer = null;
         private ScrollViewer _scrollViewer = null;
     }
 
     public partial class TextDiffView : UserControl
     {
-        public static readonly StyledProperty<Models.TextDiff> TextDiffProperty =
-            AvaloniaProperty.Register<TextDiffView, Models.TextDiff>(nameof(TextDiff), null);
-
-        public Models.TextDiff TextDiff
-        {
-            get => GetValue(TextDiffProperty);
-            set => SetValue(TextDiffProperty, value);
-        }
-
         public static readonly StyledProperty<bool> UseSideBySideDiffProperty =
             AvaloniaProperty.Register<TextDiffView, bool>(nameof(UseSideBySideDiff), false);
 
@@ -916,13 +759,20 @@ namespace SourceGit.Views
             set => SetValue(UseSideBySideDiffProperty, value);
         }
 
-        public static readonly StyledProperty<Vector> SyncScrollOffsetProperty =
+        static TextDiffView()
-            AvaloniaProperty.Register<TextDiffView, Vector>(nameof(SyncScrollOffset));
-
-        public Vector SyncScrollOffset
         {
-            get => GetValue(SyncScrollOffsetProperty);
+            UseSideBySideDiffProperty.Changed.AddClassHandler<TextDiffView>((v, e) =>
-            set => SetValue(SyncScrollOffsetProperty, value);
+            {
+                if (v.DataContext is Models.TextDiff diff)
+                {
+                    diff.SyncScrollOffset = Vector.Zero;
+
+                    if (v.UseSideBySideDiff)
+                        v.Content = new ViewModels.TwoSideTextDiff(diff);
+                    else
+                        v.Content = diff;
+                }
+            });
         }
 
         public TextDiffView()
@@ -932,6 +782,10 @@ namespace SourceGit.Views
 
         public void FillContextMenuForWorkingCopyChange(ContextMenu menu, int startLine, int endLine, bool isOldSide)
         {
+            var diff = DataContext as Models.TextDiff;
+            if (diff == null)
+                return;
+
             var parentView = this.FindAncestorOfType<DiffView>();
             if (parentView == null)
                 return;
@@ -951,7 +805,7 @@ namespace SourceGit.Views
                 endLine = tmp;
             }
 
-            var selection = GetUnifiedSelection(startLine, endLine, isOldSide);
+            var selection = GetUnifiedSelection(diff, startLine, endLine, isOldSide);
             if (!selection.HasChanges)
                 return;
 
@@ -1033,17 +887,17 @@ namespace SourceGit.Views
                         var tmpFile = Path.GetTempFileName();
                         if (change.WorkTree == Models.ChangeState.Untracked)
                         {
-                            TextDiff.GenerateNewPatchFromSelection(change, null, selection, false, tmpFile);
+                            diff.GenerateNewPatchFromSelection(change, null, selection, false, tmpFile);
                         }
                         else if (!UseSideBySideDiff)
                         {
                             var treeGuid = new Commands.QueryStagedFileBlobGuid(ctx.RepositoryPath, change.Path).Result();
-                            TextDiff.GeneratePatchFromSelection(change, treeGuid, selection, false, tmpFile);
+                            diff.GeneratePatchFromSelection(change, treeGuid, selection, false, tmpFile);
                         }
                         else
                         {
                             var treeGuid = new Commands.QueryStagedFileBlobGuid(ctx.RepositoryPath, change.Path).Result();
-                            TextDiff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, false, isOldSide, tmpFile);
+                            diff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, false, isOldSide, tmpFile);
                         }
 
                         new Commands.Apply(ctx.RepositoryPath, tmpFile, true, "nowarn", "--cache --index").Exec();
@@ -1065,17 +919,17 @@ namespace SourceGit.Views
                         var tmpFile = Path.GetTempFileName();
                         if (change.WorkTree == Models.ChangeState.Untracked)
                         {
-                            TextDiff.GenerateNewPatchFromSelection(change, null, selection, true, tmpFile);
+                            diff.GenerateNewPatchFromSelection(change, null, selection, true, tmpFile);
                         }
                         else if (!UseSideBySideDiff)
                         {
                             var treeGuid = new Commands.QueryStagedFileBlobGuid(ctx.RepositoryPath, change.Path).Result();
-                            TextDiff.GeneratePatchFromSelection(change, treeGuid, selection, true, tmpFile);
+                            diff.GeneratePatchFromSelection(change, treeGuid, selection, true, tmpFile);
                         }
                         else
                         {
                             var treeGuid = new Commands.QueryStagedFileBlobGuid(ctx.RepositoryPath, change.Path).Result();
-                            TextDiff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, true, isOldSide, tmpFile);
+                            diff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, true, isOldSide, tmpFile);
                         }
 
                         new Commands.Apply(ctx.RepositoryPath, tmpFile, true, "nowarn", "--reverse").Exec();
@@ -1103,15 +957,15 @@ namespace SourceGit.Views
                         var tmpFile = Path.GetTempFileName();
                         if (change.Index == Models.ChangeState.Added)
                         {
-                            TextDiff.GenerateNewPatchFromSelection(change, treeGuid, selection, true, tmpFile);
+                            diff.GenerateNewPatchFromSelection(change, treeGuid, selection, true, tmpFile);
                         }
                         else if (!UseSideBySideDiff)
                         {
-                            TextDiff.GeneratePatchFromSelection(change, treeGuid, selection, true, tmpFile);
+                            diff.GeneratePatchFromSelection(change, treeGuid, selection, true, tmpFile);
                         }
                         else
                         {
-                            TextDiff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, true, isOldSide, tmpFile);
+                            diff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, true, isOldSide, tmpFile);
                         }
 
                         new Commands.Apply(ctx.RepositoryPath, tmpFile, true, "nowarn", "--cache --index --reverse").Exec();
@@ -1133,17 +987,17 @@ namespace SourceGit.Views
                         var tmpFile = Path.GetTempFileName();
                         if (change.WorkTree == Models.ChangeState.Untracked)
                         {
-                            TextDiff.GenerateNewPatchFromSelection(change, null, selection, true, tmpFile);
+                            diff.GenerateNewPatchFromSelection(change, null, selection, true, tmpFile);
                         }
                         else if (!UseSideBySideDiff)
                         {
                             var treeGuid = new Commands.QueryStagedFileBlobGuid(ctx.RepositoryPath, change.Path).Result();
-                            TextDiff.GeneratePatchFromSelection(change, treeGuid, selection, true, tmpFile);
+                            diff.GeneratePatchFromSelection(change, treeGuid, selection, true, tmpFile);
                         }
                         else
                         {
                             var treeGuid = new Commands.QueryStagedFileBlobGuid(ctx.RepositoryPath, change.Path).Result();
-                            TextDiff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, true, isOldSide, tmpFile);
+                            diff.GeneratePatchFromSelectionSingleSide(change, treeGuid, selection, true, isOldSide, tmpFile);
                         }
 
                         new Commands.Apply(ctx.RepositoryPath, tmpFile, true, "nowarn", "--index --reverse").Exec();
@@ -1162,44 +1016,29 @@ namespace SourceGit.Views
             menu.Items.Add(new MenuItem() { Header = "-" });
         }
 
-        protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+        protected override void OnDataContextChanged(EventArgs e)
         {
-            base.OnPropertyChanged(change);
+            base.OnDataContextChanged(e);
 
-            var data = TextDiff;
+            var diff = DataContext as Models.TextDiff;
-            if (data == null)
+            if (diff == null)
             {
                 Content = null;
-                SyncScrollOffset = Vector.Zero;
+                GC.Collect();
                 return;
             }
 
-            if (change.Property == TextDiffProperty)
-            {
             if (UseSideBySideDiff)
-                    Content = new ViewModels.TwoSideTextDiff(TextDiff);
+                Content = new ViewModels.TwoSideTextDiff(diff, Content as ViewModels.TwoSideTextDiff);
             else
-                    Content = TextDiff;
+                Content = diff;
-
-                SetCurrentValue(SyncScrollOffsetProperty, TextDiff.SyncScrollOffset);
-            }
-            else if (change.Property == UseSideBySideDiffProperty)
-            {
-                if (UseSideBySideDiff)
-                    Content = new ViewModels.TwoSideTextDiff(TextDiff);
-                else
-                    Content = TextDiff;
-
-                SetCurrentValue(SyncScrollOffsetProperty, Vector.Zero);
-            }
         }
 
-        private Models.TextDiffSelection GetUnifiedSelection(int startLine, int endLine, bool isOldSide)
+        private Models.TextDiffSelection GetUnifiedSelection(Models.TextDiff diff, int startLine, int endLine, bool isOldSide)
         {
             var rs = new Models.TextDiffSelection();
-            var diff = TextDiff;
 
-            endLine = Math.Min(endLine, TextDiff.Lines.Count);
+            endLine = Math.Min(endLine, diff.Lines.Count);
             if (Content is ViewModels.TwoSideTextDiff twoSides)
             {
                 var target = isOldSide ? twoSides.Old : twoSides.New;
@@ -1233,8 +1072,8 @@ namespace SourceGit.Views
 
                 var firstContent = target[firstContentLine];
                 var endContent = target[endContentLine];
-                startLine = TextDiff.Lines.IndexOf(firstContent) + 1;
+                startLine = diff.Lines.IndexOf(firstContent) + 1;
-                endLine = TextDiff.Lines.IndexOf(endContent) + 1;
+                endLine = diff.Lines.IndexOf(endContent) + 1;
             }
 
             rs.StartLine = startLine;