The 2 implementations can now be switched

Added a bool property DiffView.UseChangeBlocks.
It's not bound from UI yet, but could be used for runtime switching between the two different implementations of prev/next change.
The buttons are now using the OnGoto[Prev|Next]Change Click-handler, regardless of implementation.

.github/workflows/build.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
       - name: Configure arm64 packages
         if: ${{ matrix.runtime == 'linux-arm64' }}
         run: |

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.0",
+    "version": "9.0.0",
     "rollForward": "latestMajor",
     "allowPrerelease": false
   }

src/Commands/Diff.cs

@@ -28,9 +28,9 @@ namespace SourceGit.Commands
             Context = repo;
 
             if (ignoreWhitespace)
-                Args = $"diff --patch --ignore-cr-at-eol --ignore-all-space --unified={unified} {opt}";
+                Args = $"diff --no-ext-diff --patch --ignore-cr-at-eol --ignore-all-space --unified={unified} {opt}";
             else
-                Args = $"diff --patch --ignore-cr-at-eol --unified={unified} {opt}";
+                Args = $"diff --no-ext-diff --patch --ignore-cr-at-eol --unified={unified} {opt}";
         }
 
         public Models.DiffResult Result()
@@ -51,6 +51,9 @@ namespace SourceGit.Commands
                     _result.TextDiff.MaxLineNumber = Math.Max(_newLine, _oldLine);
             }
 
+            if (_result.TextDiff != null)
+                _result.TextDiff.ProcessChangeBlocks();
+
             return _result;
         }
 

src/Models/DiffResult.cs

@@ -2,6 +2,8 @@
 using System.Text;
 using System.Text.RegularExpressions;
 
+using CommunityToolkit.Mvvm.ComponentModel;
+
 using Avalonia;
 using Avalonia.Media.Imaging;
 
@@ -59,16 +61,70 @@ namespace SourceGit.Models
         }
     }
 
-    public partial class TextDiff
+    public class TextDiffChangeBlock
+    {
+        public TextDiffChangeBlock(int startLine, int endLine)
+        {
+            StartLine = startLine;
+            EndLine = endLine;
+        }
+
+        public int StartLine { get; set; } = 0;
+        public int EndLine { get; set; } = 0;
+
+        public bool IsInRange(int line)
+        {
+            return line >= StartLine && line <= EndLine;
+        }
+    }
+
+    public partial class TextDiff : ObservableObject
     {
         public string File { get; set; } = string.Empty;
         public List<TextDiffLine> Lines { get; set; } = new List<TextDiffLine>();
         public Vector ScrollOffset { get; set; } = Vector.Zero;
         public int MaxLineNumber = 0;
 
+        public int CurrentChangeBlockIdx
+        {
+            get => _currentChangeBlockIdx;
+            set => SetProperty(ref _currentChangeBlockIdx, value);
+        }
+
         public string Repo { get; set; } = null;
         public DiffOption Option { get; set; } = null;
 
+        public List<TextDiffChangeBlock> ChangeBlocks { get; set; } = [];
+
+        public void ProcessChangeBlocks()
+        {
+            ChangeBlocks.Clear();
+            int lineIdx = 0, blockStartIdx = 0;
+            bool isNewBlock = true;
+            foreach (var line in Lines)
+            {
+                lineIdx++;
+                if (line.Type == Models.TextDiffLineType.Added ||
+                    line.Type == Models.TextDiffLineType.Deleted ||
+                    line.Type == Models.TextDiffLineType.None) // Empty
+                {
+                    if (isNewBlock)
+                    {
+                        isNewBlock = false;
+                        blockStartIdx = lineIdx;
+                    }
+                }
+                else
+                {
+                    if (!isNewBlock)
+                    {
+                        ChangeBlocks.Add(new TextDiffChangeBlock(blockStartIdx, lineIdx - 1));
+                        isNewBlock = true;
+                    }
+                }
+            }
+        }
+
         public TextDiffSelection MakeSelection(int startLine, int endLine, bool isCombined, bool isOldSide)
         {
             var rs = new TextDiffSelection();
@@ -626,6 +682,8 @@ namespace SourceGit.Models
             return true;
         }
 
+        private int _currentChangeBlockIdx = -1; // NOTE: Use -1 as "not set".
+
         [GeneratedRegex(@"^@@ \-(\d+),?\d* \+(\d+),?\d* @@")]
         private static partial Regex REG_INDICATOR();
     }

src/Models/RepositorySettings.cs

@@ -152,18 +152,12 @@ namespace SourceGit.Models
             set;
         } = "---";
 
-        public FilterMode GetHistoriesFilterMode(string pattern, FilterType type)
+        public Dictionary<string, FilterMode> CollectHistoriesFilters()
         {
+            var map = new Dictionary<string, FilterMode>();
             foreach (var filter in HistoriesFilters)
-            {
+                map.Add(filter.Pattern, filter.Mode);
-                if (filter.Type != type)
+            return map;
-                    continue;
-
-                if (filter.Pattern.Equals(pattern, StringComparison.Ordinal))
-                    return filter.Mode;
-            }
-
-            return FilterMode.None;
         }
 
         public bool UpdateHistoriesFilter(string pattern, FilterType type, FilterMode mode)

src/SourceGit.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
     <ApplicationManifest>App.manifest</ApplicationManifest>
     <ApplicationIcon>App.ico</ApplicationIcon>

src/ViewModels/DiffContext.cs

@@ -51,6 +51,12 @@ namespace SourceGit.ViewModels
             private set => SetProperty(ref _unifiedLines, value);
         }
 
+        public string ChangeBlockIndicator
+        {
+            get => _changeBlockIndicator;
+            private set => SetProperty(ref _changeBlockIndicator, value);
+        }
+
         public DiffContext(string repo, Models.DiffOption option, DiffContext previous = null)
         {
             _repo = repo;
@@ -73,6 +79,54 @@ namespace SourceGit.ViewModels
             LoadDiffContent();
         }
 
+        public void PrevChange()
+        {
+            if (_content is Models.TextDiff textDiff)
+            {
+                if (textDiff.CurrentChangeBlockIdx > 0)
+                {
+                    textDiff.CurrentChangeBlockIdx--;
+                }
+                else if (textDiff.ChangeBlocks.Count > 0)
+                {
+                    // Force property value change and (re-)jump to first change block
+                    textDiff.CurrentChangeBlockIdx = -1;
+                    textDiff.CurrentChangeBlockIdx = 0;
+                }
+            }
+            RefreshChangeBlockIndicator();
+        }
+
+        public void NextChange()
+        {
+            if (_content is Models.TextDiff textDiff)
+            {
+                if (textDiff.CurrentChangeBlockIdx < textDiff.ChangeBlocks.Count - 1)
+                {
+                    textDiff.CurrentChangeBlockIdx++;
+                }
+                else if (textDiff.ChangeBlocks.Count > 0)
+                {
+                    // Force property value change and (re-)jump to last change block
+                    textDiff.CurrentChangeBlockIdx = -1;
+                    textDiff.CurrentChangeBlockIdx = textDiff.ChangeBlocks.Count - 1;
+                }
+                RefreshChangeBlockIndicator();
+            }
+        }
+
+        public void RefreshChangeBlockIndicator()
+        {
+            string curr = "-", tot = "-";
+            if (_content is Models.TextDiff textDiff)
+            {
+                if (textDiff.CurrentChangeBlockIdx >= 0)
+                    curr = (textDiff.CurrentChangeBlockIdx + 1).ToString();
+                tot = (textDiff.ChangeBlocks.Count).ToString();
+            }
+            ChangeBlockIndicator = curr + "/" + tot;
+        }
+
         public void ToggleFullTextDiff()
         {
             Preference.Instance.UseFullTextDiff = !Preference.Instance.UseFullTextDiff;
@@ -217,7 +271,9 @@ namespace SourceGit.ViewModels
                     FileModeChange = latest.FileModeChange;
                     Content = rs;
                     IsTextDiff = rs is Models.TextDiff;
-                });
+
+                    RefreshChangeBlockIndicator();
+                 });
             });
         }
 
@@ -281,6 +337,7 @@ namespace SourceGit.ViewModels
         private string _title;
         private string _fileModeChange = string.Empty;
         private int _unifiedLines = 4;
+        private string _changeBlockIndicator = "-/-";
         private bool _isTextDiff = false;
         private bool _ignoreWhitespace = false;
         private object _content = null;

src/ViewModels/Repository.cs

@@ -827,9 +827,6 @@ namespace SourceGit.ViewModels
         public void RefreshTags()
         {
             var tags = new Commands.QueryTags(_fullpath).Result();
-            foreach (var tag in tags)
-                tag.FilterMode = _settings.GetHistoriesFilterMode(tag.Name, Models.FilterType.Tag);
-
             Dispatcher.UIThread.Invoke(() =>
             {
                 Tags = tags;
@@ -2035,8 +2032,9 @@ namespace SourceGit.ViewModels
                 builder.Run(visibles, remotes, true);
             }
 
-            UpdateBranchTreeFilterMode(builder.Locals, true);
+            var historiesFilters = _settings.CollectHistoriesFilters();
-            UpdateBranchTreeFilterMode(builder.Remotes, false);
+            UpdateBranchTreeFilterMode(builder.Locals, historiesFilters);
+            UpdateBranchTreeFilterMode(builder.Remotes, historiesFilters);
             return builder;
         }
 
@@ -2056,7 +2054,8 @@ namespace SourceGit.ViewModels
                 }
             }
 
-            UpdateTagFilterMode();
+            var historiesFilters = _settings.CollectHistoriesFilters();
+            UpdateTagFilterMode(historiesFilters);
             return visible;
         }
 
@@ -2080,32 +2079,36 @@ namespace SourceGit.ViewModels
 
         private void RefreshHistoriesFilters()
         {
-            UpdateBranchTreeFilterMode(LocalBranchTrees, true);
+            var filters = _settings.CollectHistoriesFilters();
-            UpdateBranchTreeFilterMode(RemoteBranchTrees, false);
+            UpdateBranchTreeFilterMode(LocalBranchTrees, filters);
-            UpdateTagFilterMode();
+            UpdateBranchTreeFilterMode(RemoteBranchTrees, filters);
+            UpdateTagFilterMode(filters);
             Task.Run(RefreshCommits);
         }
 
-        private void UpdateBranchTreeFilterMode(List<BranchTreeNode> nodes, bool isLocal)
+        private void UpdateBranchTreeFilterMode(List<BranchTreeNode> nodes, Dictionary<string, Models.FilterMode> filters)
         {
             foreach (var node in nodes)
             {
-                if (node.IsBranch)
+                if (filters.TryGetValue(node.Path, out var value))
-                {
+                    node.FilterMode = value;
-                    node.FilterMode = _settings.GetHistoriesFilterMode(node.Path, isLocal ? Models.FilterType.LocalBranch : Models.FilterType.RemoteBranch);
-                }
                 else
-                {
+                    node.FilterMode = Models.FilterMode.None;
-                    node.FilterMode = _settings.GetHistoriesFilterMode(node.Path, isLocal ? Models.FilterType.LocalBranchFolder : Models.FilterType.RemoteBranchFolder);
+
-                    UpdateBranchTreeFilterMode(node.Children, isLocal);
+                if (!node.IsBranch)
-                }
+                    UpdateBranchTreeFilterMode(node.Children, filters);
             }
         }
 
-        private void UpdateTagFilterMode()
+        private void UpdateTagFilterMode(Dictionary<string, Models.FilterMode> filters)
         {
             foreach (var tag in _tags)
-                tag.FilterMode = _settings.GetHistoriesFilterMode(tag.Name, Models.FilterType.Tag);
+            {
+                if (filters.TryGetValue(tag.Name, out var value))
+                    tag.FilterMode = value;
+                else
+                    tag.FilterMode = Models.FilterMode.None;
+            }
         }
 
         private void ResetBranchTreeFilterMode(List<BranchTreeNode> nodes)

src/ViewModels/TwoSideTextDiff.cs

@@ -45,10 +45,43 @@ namespace SourceGit.ViewModels
 
             FillEmptyLines();
 
+            ProcessChangeBlocks();
+
             if (previous != null && previous.File == File)
                 _syncScrollOffset = previous._syncScrollOffset;
         }
 
+        public List<Models.TextDiffChangeBlock> ChangeBlocks { get; set; } = [];
+
+        public void ProcessChangeBlocks()
+        {
+            ChangeBlocks.Clear();
+            int lineIdx = 0, blockStartIdx = 0;
+            bool isNewBlock = true;
+            foreach (var line in Old) // NOTE: Same block size in both Old and New lines.
+            {
+                lineIdx++;
+                if (line.Type == Models.TextDiffLineType.Added ||
+                    line.Type == Models.TextDiffLineType.Deleted ||
+                    line.Type == Models.TextDiffLineType.None) // Empty
+                {
+                    if (isNewBlock)
+                    {
+                        isNewBlock = false;
+                        blockStartIdx = lineIdx;
+                    }
+                }
+                else
+                {
+                    if (!isNewBlock)
+                    {
+                        ChangeBlocks.Add(new Models.TextDiffChangeBlock(blockStartIdx, lineIdx - 1));
+                        isNewBlock = true;
+                    }
+                }
+            }
+        }
+
         public void ConvertsToCombinedRange(Models.TextDiff combined, ref int startLine, ref int endLine, bool isOldSide)
         {
             endLine = Math.Min(endLine, combined.Lines.Count - 1);

src/Views/DiffView.axaml

@@ -34,8 +34,31 @@
 
           <!-- Toolbar Buttons -->
           <StackPanel Grid.Column="3" Margin="8,0,0,0" Orientation="Horizontal" VerticalAlignment="Center">
+            <Button Classes="icon_button"
+                    Width="28"
+                    Click="OnGotoPrevChange"
+                    IsVisible="{Binding IsTextDiff}"
+                    ToolTip.Tip="{DynamicResource Text.Diff.Prev}">
+              <Path Width="12" Height="12" Stretch="Uniform" Margin="0,6,0,0" Data="{StaticResource Icons.Up}"/>
+            </Button>
+
+            <TextBlock Classes="primary" 
+                       Margin="0,0,0,0" 
+                       Text="{Binding ChangeBlockIndicator}" 
+                       FontSize="11" 
+                       TextTrimming="CharacterEllipsis"
+                       IsVisible="{Binding IsTextDiff}"/>
+
+            <Button Classes="icon_button"
+                    Width="28"
+                    Click="OnGotoNextChange"
+                    IsVisible="{Binding IsTextDiff}"
+                    ToolTip.Tip="{DynamicResource Text.Diff.Next}">
+              <Path Width="12" Height="12" Stretch="Uniform" Margin="0,6,0,0" Data="{StaticResource Icons.Down}"/>
+            </Button>
+            
             <Button Classes="icon_button" 
-                    Width="32" 
+                    Width="28"
                     Command="{Binding IncrUnified}" 
                     IsVisible="{Binding IsTextDiff}"
                     ToolTip.Tip="{DynamicResource Text.Diff.VisualLines.Incr}">
@@ -46,7 +69,7 @@
             </Button>
 
             <Button Classes="icon_button" 
-                    Width="32" 
+                    Width="28" 
                     Command="{Binding DecrUnified}" 
                     IsVisible="{Binding IsTextDiff}" 
                     ToolTip.Tip="{DynamicResource Text.Diff.VisualLines.Decr}">
@@ -60,9 +83,7 @@
             </Button>
             
             <ToggleButton Classes="line_path"
-                          Width="32" Height="18"
+                          Width="28"
-                          Background="Transparent"
-                          Padding="9,6"
                           Command="{Binding ToggleFullTextDiff}"
                           IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=UseFullTextDiff, Mode=OneWay}"
                           IsVisible="{Binding IsTextDiff}"
@@ -71,9 +92,8 @@
             </ToggleButton>
 
             <ToggleButton Classes="line_path"
-                          Width="32" Height="18"
+                          Width="28"
                           Background="Transparent"
-                          Padding="9,6"
                           IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting, Mode=TwoWay}"
                           IsVisible="{Binding IsTextDiff}"
                           ToolTip.Tip="{DynamicResource Text.Diff.SyntaxHighlight}">
@@ -81,9 +101,7 @@
             </ToggleButton>
 
             <ToggleButton Classes="line_path"
-                          Width="32" Height="18"
+                          Width="28"
-                          Background="Transparent"
-                          Padding="9,6"
                           IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=EnableDiffViewWordWrap, Mode=TwoWay}"
                           ToolTip.Tip="{DynamicResource Text.Diff.ToggleWordWrap}">
               <ToggleButton.IsVisible>
@@ -97,14 +115,14 @@
             </ToggleButton>
 
             <ToggleButton Classes="line_path"
-                          Width="32"
+                          Width="28"
                           IsChecked="{Binding IgnoreWhitespace, Mode=TwoWay}"
                           ToolTip.Tip="{DynamicResource Text.Diff.IgnoreWhitespace}">
               <Path Width="14" Height="14" Stretch="Uniform" Data="{StaticResource Icons.Whitespace}"/>
             </ToggleButton>
 
             <ToggleButton Classes="line_path"
-                          Width="32"
+                          Width="28"
                           IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=ShowHiddenSymbolsInDiffView, Mode=TwoWay}"
                           IsVisible="{Binding IsTextDiff}"
                           ToolTip.Tip="{DynamicResource Text.Diff.ShowHiddenSymbols}">
@@ -112,16 +130,14 @@
             </ToggleButton>
 
             <ToggleButton Classes="line_path"
-                          Width="32" Height="18"
+                          Width="28" Height="18"
-                          Background="Transparent"
-                          Padding="9,6"
                           IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSideBySideDiff, Mode=TwoWay}"
                           IsVisible="{Binding IsTextDiff}"
                           ToolTip.Tip="{DynamicResource Text.Diff.SideBySide}">
               <Path Width="12" Height="12" Data="{StaticResource Icons.LayoutHorizontal}" Margin="0,2,0,0"/>
             </ToggleButton>
 
-            <Button Classes="icon_button" Width="32" Command="{Binding OpenExternalMergeTool}" ToolTip.Tip="{DynamicResource Text.Diff.UseMerger}">
+            <Button Classes="icon_button" Width="28" Command="{Binding OpenExternalMergeTool}" ToolTip.Tip="{DynamicResource Text.Diff.UseMerger}">
               <Path Width="12" Height="12" Stretch="Uniform" Data="{StaticResource Icons.OpenWith}"/>
             </Button>
           </StackPanel>
@@ -232,7 +248,8 @@
           <DataTemplate DataType="m:TextDiff">
             <v:TextDiffView 
               UseSideBySideDiff="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSideBySideDiff, Mode=OneWay}"
-              UseFullTextDiff="{Binding Source={x:Static vm:Preference.Instance}, Path=UseFullTextDiff, Mode=OneWay}"/>
+              UseFullTextDiff="{Binding Source={x:Static vm:Preference.Instance}, Path=UseFullTextDiff, Mode=OneWay}"
+              CurrentChangeBlockIdx="{Binding CurrentChangeBlockIdx, Mode=OneWay}"/>
           </DataTemplate>
 
           <!-- Empty or only EOL changes -->

src/Views/DiffView.axaml.cs

@@ -1,4 +1,6 @@
 using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.VisualTree;
 
 namespace SourceGit.Views
 {
@@ -8,5 +10,49 @@ namespace SourceGit.Views
         {
             InitializeComponent();
         }
+
+        public bool UseChangeBlocks { get; set; } = true;
+
+        private void OnGotoPrevChange(object _, RoutedEventArgs e)
+        {
+            if (UseChangeBlocks)
+            {
+                if (DataContext is ViewModels.DiffContext diffCtx)
+                    diffCtx.PrevChange();
+            }
+            else
+            {
+                var textDiff = this.FindDescendantOfType<ThemedTextDiffPresenter>();
+                if (textDiff == null)
+                    return;
+
+                textDiff.GotoPrevChange();
+                if (textDiff is SingleSideTextDiffPresenter presenter)
+                    presenter.ForceSyncScrollOffset();
+
+                e.Handled = true;
+            }
+        }
+
+        private void OnGotoNextChange(object _, RoutedEventArgs e)
+        {
+            if (UseChangeBlocks)
+            {
+                if (DataContext is ViewModels.DiffContext diffCtx)
+                    diffCtx.NextChange();
+            }
+            else
+            {
+                var textDiff = this.FindDescendantOfType<ThemedTextDiffPresenter>();
+                if (textDiff == null)
+                    return;
+
+                textDiff.GotoNextChange();
+                if (textDiff is SingleSideTextDiffPresenter presenter)
+                    presenter.ForceSyncScrollOffset();
+
+                e.Handled = true;
+            }
+        }
     }
 }

src/Views/TextDiffView.axaml

@@ -27,6 +27,7 @@
                                        UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
                                        WordWrap="{Binding Source={x:Static vm:Preference.Instance}, Path=EnableDiffViewWordWrap}"
                                        ShowHiddenSymbols="{Binding Source={x:Static vm:Preference.Instance}, Path=ShowHiddenSymbolsInDiffView}"
+                                       CurrentChangeBlockIdx="{Binding #ThisControl.CurrentChangeBlockIdx}"
                                        EnableChunkSelection="{Binding #ThisControl.EnableChunkSelection}"
                                        SelectedChunk="{Binding #ThisControl.SelectedChunk, Mode=TwoWay}"/>
         </DataTemplate>
@@ -49,6 +50,7 @@
                                            UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
                                            WordWrap="False"
                                            ShowHiddenSymbols="{Binding Source={x:Static vm:Preference.Instance}, Path=ShowHiddenSymbolsInDiffView}"
+                                           CurrentChangeBlockIdx="{Binding #ThisControl.CurrentChangeBlockIdx}"
                                            EnableChunkSelection="{Binding #ThisControl.EnableChunkSelection}"
                                            SelectedChunk="{Binding #ThisControl.SelectedChunk, Mode=TwoWay}"/>
 
@@ -70,6 +72,7 @@
                                            UseSyntaxHighlighting="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting}"
                                            WordWrap="False"
                                            ShowHiddenSymbols="{Binding Source={x:Static vm:Preference.Instance}, Path=ShowHiddenSymbolsInDiffView}"
+                                           CurrentChangeBlockIdx="{Binding #ThisControl.CurrentChangeBlockIdx}"
                                            EnableChunkSelection="{Binding #ThisControl.EnableChunkSelection}"
                                            SelectedChunk="{Binding #ThisControl.SelectedChunk, Mode=TwoWay}"/>
           </Grid>

src/Views/TextDiffView.axaml.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using System.Text;
 
 using Avalonia;
@@ -243,6 +244,10 @@ namespace SourceGit.Views
                 if (_presenter.Document == null || !textView.VisualLinesValid)
                     return;
 
+                var changeBlock = _presenter.GetCurrentChangeBlock();
+                Brush changeBlockBG = new SolidColorBrush(Colors.Gray, 0.25);
+                Pen changeBlockFG = new Pen(Brushes.Gray, 1);
+
                 var lines = _presenter.GetLines();
                 var width = textView.Bounds.Width;
                 foreach (var line in textView.VisualLines)
@@ -255,51 +260,63 @@ namespace SourceGit.Views
                         break;
 
                     var info = lines[index - 1];
-                    var bg = GetBrushByLineType(info.Type);
-                    if (bg == null)
-                        continue;
 
                     var startY = line.GetTextLineVisualYPosition(line.TextLines[0], VisualYPosition.LineTop) - textView.VerticalOffset;
                     var endY = line.GetTextLineVisualYPosition(line.TextLines[^1], VisualYPosition.LineBottom) - textView.VerticalOffset;
-                    drawingContext.DrawRectangle(bg, null, new Rect(0, startY, width, endY - startY));
 
-                    if (info.Highlights.Count > 0)
+                    var bg = GetBrushByLineType(info.Type);
+                    if (bg != null)
                     {
-                        var highlightBG = info.Type == Models.TextDiffLineType.Added ? _presenter.AddedHighlightBrush : _presenter.DeletedHighlightBrush;
+                        if (bg != null)
-                        var processingIdxStart = 0;
+                            drawingContext.DrawRectangle(bg, null, new Rect(0, startY, width, endY - startY));
-                        var processingIdxEnd = 0;
-                        var nextHightlight = 0;
 
-                        foreach (var tl in line.TextLines)
+                        if (info.Highlights.Count > 0)
                         {
-                            processingIdxEnd += tl.Length;
+                            var highlightBG = info.Type == Models.TextDiffLineType.Added ? _presenter.AddedHighlightBrush : _presenter.DeletedHighlightBrush;
+                            var processingIdxStart = 0;
+                            var processingIdxEnd = 0;
+                            var nextHighlight = 0;
 
-                            var y = line.GetTextLineVisualYPosition(tl, VisualYPosition.LineTop) - textView.VerticalOffset;
+                            foreach (var tl in line.TextLines)
-                            var h = line.GetTextLineVisualYPosition(tl, VisualYPosition.LineBottom) - textView.VerticalOffset - y;
-
-                            while (nextHightlight < info.Highlights.Count)
                             {
-                                var highlight = info.Highlights[nextHightlight];
+                                processingIdxEnd += tl.Length;
-                                if (highlight.Start >= processingIdxEnd)
-                                    break;
 
-                                var start = line.GetVisualColumn(highlight.Start < processingIdxStart ? processingIdxStart : highlight.Start);
+                                var y = line.GetTextLineVisualYPosition(tl, VisualYPosition.LineTop) - textView.VerticalOffset;
-                                var end = line.GetVisualColumn(highlight.End >= processingIdxEnd ? processingIdxEnd : highlight.End + 1);
+                                var h = line.GetTextLineVisualYPosition(tl, VisualYPosition.LineBottom) - textView.VerticalOffset - y;
 
-                                var x = line.GetTextLineVisualXPosition(tl, start) - textView.HorizontalOffset;
+                                while (nextHighlight < info.Highlights.Count)
-                                var w = line.GetTextLineVisualXPosition(tl, end) - textView.HorizontalOffset - x;
+                                {
-                                var rect = new Rect(x, y, w, h);
+                                    var highlight = info.Highlights[nextHighlight];
-                                drawingContext.DrawRectangle(highlightBG, null, rect);
+                                    if (highlight.Start >= processingIdxEnd)
+                                        break;
 
-                                if (highlight.End >= processingIdxEnd)
+                                    var start = line.GetVisualColumn(highlight.Start < processingIdxStart ? processingIdxStart : highlight.Start);
-                                    break;
+                                    var end = line.GetVisualColumn(highlight.End >= processingIdxEnd ? processingIdxEnd : highlight.End + 1);
 
-                                nextHightlight++;
+                                    var x = line.GetTextLineVisualXPosition(tl, start) - textView.HorizontalOffset;
+                                    var w = line.GetTextLineVisualXPosition(tl, end) - textView.HorizontalOffset - x;
+                                    var rect = new Rect(x, y, w, h);
+                                    drawingContext.DrawRectangle(highlightBG, null, rect);
+
+                                    if (highlight.End >= processingIdxEnd)
+                                        break;
+
+                                    nextHighlight++;
+                                }
+
+                                processingIdxStart = processingIdxEnd;
                             }
-
-                            processingIdxStart = processingIdxEnd;
                         }
                     }
+
+                    if (changeBlock != null && changeBlock.IsInRange(index))
+                    {
+                        drawingContext.DrawRectangle(changeBlockBG, null, new Rect(0, startY, width, endY - startY));
+                        if (index == changeBlock.StartLine)
+                            drawingContext.DrawLine(changeBlockFG, new Point(0, startY), new Point(width, startY));
+                        if (index == changeBlock.EndLine)
+                            drawingContext.DrawLine(changeBlockFG, new Point(0, endY), new Point(width, endY));
+                    }
                 }
             }
 
@@ -466,6 +483,15 @@ namespace SourceGit.Views
             set => SetValue(SelectedChunkProperty, value);
         }
 
+        public static readonly StyledProperty<int> CurrentChangeBlockIdxProperty =
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, int>(nameof(CurrentChangeBlockIdx));
+
+        public int CurrentChangeBlockIdx
+        {
+            get => GetValue(CurrentChangeBlockIdxProperty);
+            set => SetValue(CurrentChangeBlockIdxProperty, value);
+        }
+
         protected override Type StyleKeyOverride => typeof(TextEditor);
 
         public ThemedTextDiffPresenter(TextArea area, TextDocument doc) : base(area, doc)
@@ -498,6 +524,127 @@ namespace SourceGit.Views
         {
         }
 
+        public void GotoPrevChange()
+        {
+            var view = TextArea.TextView;
+            var lines = GetLines();
+            var firstLineIdx = lines.Count;
+            foreach (var line in view.VisualLines)
+            {
+                if (line.IsDisposed || line.FirstDocumentLine == null || line.FirstDocumentLine.IsDeleted)
+                    continue;
+
+                var index = line.FirstDocumentLine.LineNumber - 1;
+                if (index >= lines.Count)
+                    continue;
+
+                if (firstLineIdx > index)
+                    firstLineIdx = index;
+            }
+
+            if (firstLineIdx <= 1)
+                return;
+
+            var firstLineType = lines[firstLineIdx].Type;
+            var prevLineType = lines[firstLineIdx - 1].Type;
+            var isChangeFirstLine = firstLineType != Models.TextDiffLineType.Normal && firstLineType != Models.TextDiffLineType.Indicator;
+            var isChangePrevLine = prevLineType != Models.TextDiffLineType.Normal && prevLineType != Models.TextDiffLineType.Indicator;
+            if (isChangeFirstLine && isChangePrevLine)
+            {
+                for (var i = firstLineIdx - 2; i >= 0; i--)
+                {
+                    var prevType = lines[i].Type;
+                    if (prevType == Models.TextDiffLineType.Normal || prevType == Models.TextDiffLineType.Indicator)
+                    {
+                        ScrollToLine(i + 2);
+                        return;
+                    }
+                }
+            }
+
+            var findChange = false;
+            for (var i = firstLineIdx - 1; i >= 0; i--)
+            {
+                var prevType = lines[i].Type;
+                if (prevType == Models.TextDiffLineType.Normal || prevType == Models.TextDiffLineType.Indicator)
+                {
+                    if (findChange)
+                    {
+                        ScrollToLine(i + 2);
+                        return;
+                    }
+                }
+                else if (!findChange)
+                {
+                    findChange = true;
+                }
+            }
+        }
+
+        public void GotoNextChange()
+        {
+            var view = TextArea.TextView;
+            var lines = GetLines();
+            var lastLineIdx = -1;
+            foreach (var line in view.VisualLines)
+            {
+                if (line.IsDisposed || line.FirstDocumentLine == null || line.FirstDocumentLine.IsDeleted)
+                    continue;
+
+                var index = line.FirstDocumentLine.LineNumber - 1;
+                if (index >= lines.Count)
+                    continue;
+
+                if (lastLineIdx < index)
+                    lastLineIdx = index;
+            }
+
+            if (lastLineIdx >= lines.Count - 1)
+                return;
+
+            var lastLineType = lines[lastLineIdx].Type;
+            var findNormalLine = lastLineType == Models.TextDiffLineType.Normal || lastLineType == Models.TextDiffLineType.Indicator;
+            for (var idx = lastLineIdx + 1; idx < lines.Count; idx++)
+            {
+                var nextType = lines[idx].Type;
+                if (nextType == Models.TextDiffLineType.None ||
+                    nextType == Models.TextDiffLineType.Added ||
+                    nextType == Models.TextDiffLineType.Deleted)
+                {
+                    if (findNormalLine)
+                    {
+                        ScrollToLine(idx + 1);
+                        return;
+                    }
+                }
+                else if (!findNormalLine)
+                {
+                    findNormalLine = true;
+                }
+            }
+        }
+
+        public Models.TextDiffChangeBlock GetCurrentChangeBlock()
+        {
+            return GetChangeBlock(CurrentChangeBlockIdx);
+        }
+
+        public virtual Models.TextDiffChangeBlock GetChangeBlock(int changeBlockIdx)
+        {
+            return null;
+        }
+
+        public void JumpToChangeBlock(int changeBlockIdx)
+        {
+            var changeBlock = GetChangeBlock(changeBlockIdx);
+            if (changeBlock != null)
+            {
+                TextArea.Caret.Line = changeBlock.StartLine;
+                //TextArea.Caret.BringCaretToView(); // NOTE: Brings caret line (barely) into view.
+                ScrollToLine(changeBlock.StartLine); // NOTE: Brings specified line into center of view.
+            }
+        }
+
         public override void Render(DrawingContext context)
         {
             base.Render(context);
@@ -895,6 +1042,16 @@ namespace SourceGit.Views
             }
         }
 
+        public override Models.TextDiffChangeBlock GetChangeBlock(int changeBlockIdx)
+        {
+            if (DataContext is Models.TextDiff diff)
+            {
+                if (changeBlockIdx >= 0 && changeBlockIdx < diff.ChangeBlocks.Count)
+                    return diff.ChangeBlocks[changeBlockIdx];
+            }
+            return null;
+        }
+
         protected override void OnLoaded(RoutedEventArgs e)
         {
             base.OnLoaded(e);
@@ -968,6 +1125,12 @@ namespace SourceGit.Views
             TextArea.LeftMargins.Add(new LineModifyTypeMargin());
         }
 
+        public void ForceSyncScrollOffset()
+        {
+            if (DataContext is ViewModels.TwoSideTextDiff diff)
+                diff.SyncScrollOffset = _scrollViewer.Offset;
+        }
+
         public override List<Models.TextDiffLine> GetLines()
         {
             if (DataContext is ViewModels.TwoSideTextDiff diff)
@@ -1109,6 +1272,16 @@ namespace SourceGit.Views
             }
         }
 
+        public override Models.TextDiffChangeBlock GetChangeBlock(int changeBlockIdx)
+        {
+            if (DataContext is ViewModels.TwoSideTextDiff diff)
+            {
+                if (changeBlockIdx >= 0 && changeBlockIdx < diff.ChangeBlocks.Count)
+                    return diff.ChangeBlocks[changeBlockIdx];
+            }
+            return null;
+        }
+
         protected override void OnLoaded(RoutedEventArgs e)
         {
             base.OnLoaded(e);
@@ -1241,6 +1414,15 @@ namespace SourceGit.Views
             set => SetValue(EnableChunkSelectionProperty, value);
         }
 
+        public static readonly StyledProperty<int> CurrentChangeBlockIdxProperty =
+            AvaloniaProperty.Register<TextDiffView, int>(nameof(CurrentChangeBlockIdx));
+
+        public int CurrentChangeBlockIdx
+        {
+            get => GetValue(CurrentChangeBlockIdxProperty);
+            set => SetValue(CurrentChangeBlockIdxProperty, value);
+        }
+
         static TextDiffView()
         {
             UseSideBySideDiffProperty.Changed.AddClassHandler<TextDiffView>((v, _) =>
@@ -1267,6 +1449,19 @@ namespace SourceGit.Views
                 v.Popup.Margin = new Thickness(0, top, right, 0);
                 v.Popup.IsVisible = true;
             });
+
+            CurrentChangeBlockIdxProperty.Changed.AddClassHandler<TextDiffView>((v, e) =>
+            {
+                if (v.Editor.Presenter != null)
+                {
+                    foreach (var p in v.Editor.Presenter.GetVisualDescendants().OfType<ThemedTextDiffPresenter>())
+                    {
+                        p.JumpToChangeBlock((int)e.NewValue);
+                        if (p is SingleSideTextDiffPresenter ssp)
+                            ssp.ForceSyncScrollOffset();
+                    }
+                }
+            });
         }
 
         public TextDiffView()
@@ -1314,6 +1509,8 @@ namespace SourceGit.Views
 
             IsUnstagedChange = diff.Option.IsUnstaged;
             EnableChunkSelection = diff.Option.WorkingCopyChange != null;
+
+            diff.CurrentChangeBlockIdx = -1; // Unset current change block.
         }
 
         private void OnStageChunk(object _1, RoutedEventArgs _2)