refactor: use bindings instead of sync manually

Author: love-linger

src/Models/DiffResult.cs

@@ -63,8 +63,8 @@ public partial class TextDiff
     {
         public string File { get; set; } = string.Empty;
         public List<TextDiffLine> Lines { get; set; } = new List<TextDiffLine>();
+        public Vector SyncScrollOffset { get; set; } = Vector.Zero;
         public int MaxLineNumber = 0;
-        public Vector SyncScrollOffset = Vector.Zero;
 
         public void GenerateNewPatchFromSelection(Change change, string fileBlobGuid, TextDiffSelection selection, bool revert, string output)
         {

src/Views/DiffView.axaml

@@ -224,6 +224,7 @@
           <!-- Text Diff -->
           <DataTemplate DataType="m:TextDiff">
             <v:TextDiffView TextDiff="{Binding}"
+                            SyncScrollOffset="{Binding SyncScrollOffset, Mode=TwoWay}"
                             UseSideBySideDiff="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSideBySideDiff, Mode=OneWay}"/>
           </DataTemplate>
 

src/Views/TextDiffView.axaml.cs

@@ -1169,19 +1169,11 @@ protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs chang
             if (change.Property == TextDiffProperty)
             {
                 if (TextDiff == null)
-                {
                     Content = null;
-                }
                 else if (UseSideBySideDiff)
-                {
                     Content = new ViewModels.TwoSideTextDiff(TextDiff);
-                    SyncScrollOffset = TextDiff.SyncScrollOffset;
-                }
                 else
-                {
                     Content = TextDiff;
-                    SyncScrollOffset = TextDiff.SyncScrollOffset;
-                }
             }
             else if (change.Property == UseSideBySideDiffProperty)
             {
@@ -1194,11 +1186,6 @@ protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs chang
                 else
                     Content = TextDiff;
             }
-            else if (change.Property == SyncScrollOffsetProperty)
-            {
-                if (TextDiff != null)
-                    TextDiff.SyncScrollOffset = SyncScrollOffset;
-            }
         }
 
         private Models.TextDiffSelection GetUnifiedSelection(int startLine, int endLine, bool isOldSide)