feature: add auto complete box for searching commits by file path

src/Commands/QueryCurrentRevisionFiles.cs

@@ -0,0 +1,21 @@
+namespace SourceGit.Commands
+{
+    public class QueryCurrentRevisionFiles : Command
+    {
+        public QueryCurrentRevisionFiles(string repo)
+        {
+            WorkingDirectory = repo;
+            Context = repo;
+            Args = "ls-tree -r --name-only HEAD";
+        }
+
+        public string[] Result()
+        {
+            var rs = ReadToEnd();
+            if (rs.IsSuccess)
+                return rs.StdOut.Split('\n', System.StringSplitOptions.RemoveEmptyEntries);
+
+            return [];
+        }
+    }
+}

src/ViewModels/Repository.cs

@@ -4,6 +4,7 @@ using System.IO;
 using System.Text.Json;
 using System.Threading.Tasks;
 
+using Avalonia.Collections;
 using Avalonia.Controls;
 using Avalonia.Media;
 using Avalonia.Media.Imaging;
@@ -170,8 +171,15 @@ namespace SourceGit.ViewModels
                 {
                     SearchedCommits = new List<Models.Commit>();
                     SearchCommitFilter = string.Empty;
+                    SearchCommitFilterSuggestion.Clear();
+                    IsSearchCommitSuggestionOpen = false;
+                    _revisionFiles.Clear();
+
                     if (value)
+                    {
                         SelectedViewIndex = 0;
+                        UpdateCurrentRevisionFilesForSearchSuggestion();
+                    }
                 }
             }
         }
@@ -185,14 +193,58 @@ namespace SourceGit.ViewModels
         public int SearchCommitFilterType
         {
             get => _searchCommitFilterType;
-            set => SetProperty(ref _searchCommitFilterType, value);
+            set
+            {
+                if (SetProperty(ref _searchCommitFilterType, value))
+                    UpdateCurrentRevisionFilesForSearchSuggestion();
+            }
         }
 
         public string SearchCommitFilter
         {
             get => _searchCommitFilter;
-            set => SetProperty(ref _searchCommitFilter, value);
+            set
+            {
+                if (SetProperty(ref _searchCommitFilter, value) &&
+                    _searchCommitFilterType == 3 &&
+                    !string.IsNullOrEmpty(value) && 
+                    value.Length >= 2 && 
+                    _revisionFiles.Count > 0)
+                {
+                    var suggestion = new List<string>();
+                    foreach (var file in _revisionFiles)
+                    {
+                        if (file.Contains(value, StringComparison.OrdinalIgnoreCase) && file.Length != value.Length)
+                        {
+                            suggestion.Add(file);
+                            if (suggestion.Count > 100)
+                                break;
                         }
+                    }
+
+                    SearchCommitFilterSuggestion.Clear();
+                    SearchCommitFilterSuggestion.AddRange(suggestion);
+                    IsSearchCommitSuggestionOpen = SearchCommitFilterSuggestion.Count > 0;
+                }
+                else if (SearchCommitFilterSuggestion.Count > 0)
+                {
+                    SearchCommitFilterSuggestion.Clear();
+                    IsSearchCommitSuggestionOpen = false;
+                }
+            }
+        }
+
+        public bool IsSearchCommitSuggestionOpen
+        {
+            get => _isSearchCommitSuggestionOpen;
+            set => SetProperty(ref _isSearchCommitSuggestionOpen, value);
+        }
+
+        public AvaloniaList<string> SearchCommitFilterSuggestion
+        {
+            get;
+            private set;
+        } = new AvaloniaList<string>();
 
         public List<Models.Commit> SearchedCommits
         {
@@ -306,6 +358,9 @@ namespace SourceGit.ViewModels
             _visibleTags.Clear();
             _submodules.Clear();
             _searchedCommits.Clear();
+
+            _revisionFiles.Clear();
+            SearchCommitFilterSuggestion.Clear();
         }
 
         public void RefreshAll()
@@ -450,6 +505,8 @@ namespace SourceGit.ViewModels
                 return;
 
             IsSearchLoadingVisible = true;
+            IsSearchCommitSuggestionOpen = false;
+            SearchCommitFilterSuggestion.Clear();
 
             Task.Run(() =>
             {
@@ -1886,6 +1943,20 @@ namespace SourceGit.ViewModels
             return visible;
         }
 
+        private void UpdateCurrentRevisionFilesForSearchSuggestion()
+        {
+            _revisionFiles.Clear();
+
+            if (_searchCommitFilterType == 3)
+            {
+                Task.Run(() =>
+                {
+                    var files = new Commands.QueryCurrentRevisionFiles(_fullpath).Result();
+                    Dispatcher.UIThread.Invoke(() => _revisionFiles.AddRange(files));
+                });
+            }
+        }
+
         private string _fullpath = string.Empty;
         private string _gitDir = string.Empty;
         private Models.RepositorySettings _settings = null;
@@ -1899,9 +1970,11 @@ namespace SourceGit.ViewModels
 
         private bool _isSearching = false;
         private bool _isSearchLoadingVisible = false;
+        private bool _isSearchCommitSuggestionOpen = false;
         private int _searchCommitFilterType = 0;
         private string _searchCommitFilter = string.Empty;
         private List<Models.Commit> _searchedCommits = new List<Models.Commit>();
+        private List<string> _revisionFiles = new List<string>();
 
         private bool _isLocalBranchGroupExpanded = true;
         private bool _isRemoteGroupExpanded = false;

src/Views/Repository.axaml

@@ -453,10 +453,10 @@
       </Grid>
 
       <!-- Commit Search Panel -->
-      <Grid Grid.Row="1" RowDefinitions="Auto,32,*" Margin="8,0,4,8" IsVisible="{Binding IsSearching}" PropertyChanged="OnSearchCommitPanelPropertyChanged">
+      <Grid Grid.Row="1" RowDefinitions="24,32,*" Margin="8,0,4,8" IsVisible="{Binding IsSearching}" PropertyChanged="OnSearchCommitPanelPropertyChanged">
         <!-- Search Input Box -->
-        <TextBox Grid.Row="0"
+        <Grid Grid.Row="0">
-                 x:Name="TxtSearchCommitsBox"
+          <TextBox x:Name="TxtSearchCommitsBox"
                    Height="24"
                    BorderThickness="1"
                    BorderBrush="{DynamicResource Brush.Border2}"
@@ -488,6 +488,58 @@
             </TextBox.InnerRightContent>
           </TextBox>
 
+          <Popup PlacementTarget="#TxtSearchCommitsBox"
+                 Placement="BottomEdgeAlignedLeft"
+                 HorizontalOffset="-8" VerticalAlignment="-8"
+                 IsOpen="{Binding IsSearchCommitSuggestionOpen}">
+            <Border Margin="8" VerticalAlignment="Top" Effect="drop-shadow(0 0 8 #80000000)">
+              <Border Background="{DynamicResource Brush.Popup}" CornerRadius="4" Padding="4" BorderThickness="0.65" BorderBrush="{DynamicResource Brush.Accent}">
+                <ListBox x:Name="SearchSuggestionBox"
+                         Background="Transparent"
+                         SelectionMode="Single"
+                         ItemsSource="{Binding SearchCommitFilterSuggestion}"
+                         MaxHeight="400"
+                         Focusable="True"
+                         KeyDown="OnSearchSuggestionBoxKeyDown">
+                  <ListBox.Styles>
+                    <Style Selector="ListBoxItem">
+                      <Setter Property="Padding" Value="0"/>
+                      <Setter Property="MinHeight" Value="26"/>
+                      <Setter Property="CornerRadius" Value="4"/>
+                    </Style>
+
+                    <Style Selector="ListBox">
+                      <Setter Property="FocusAdorner">
+                        <FocusAdornerTemplate>
+                          <Grid/>
+                        </FocusAdornerTemplate>
+                      </Setter>
+                    </Style>
+                  </ListBox.Styles>
+
+                  <ListBox.ItemsPanel>
+                    <ItemsPanelTemplate>
+                      <StackPanel Orientation="Vertical"/>
+                    </ItemsPanelTemplate>
+                  </ListBox.ItemsPanel>
+
+                  <ListBox.ItemTemplate>
+                    <DataTemplate DataType="x:String">
+                      <StackPanel Background="Transparent" Orientation="Vertical" Margin="8,4" DoubleTapped="OnSearchSuggestionDoubleTapped">
+                        <StackPanel Orientation="Horizontal">
+                          <Path Width="12" Height="12" Data="{StaticResource Icons.File}"/>
+                          <TextBlock Classes="primary" Margin="6,0,0,0" Text="{Binding Converter={x:Static c:PathConverters.PureFileName}}"/>
+                        </StackPanel>
+                        <TextBlock Classes="primary" FontSize="12" Margin="18,2,0,0" Foreground="{DynamicResource Brush.FG2}" Text="{Binding Converter={x:Static c:PathConverters.PureDirectoryName}}"/>
+                      </StackPanel>
+                    </DataTemplate>
+                  </ListBox.ItemTemplate>
+                </ListBox>
+              </Border>
+            </Border>
+          </Popup>
+        </Grid>
+
         <Grid Grid.Row="1" ColumnDefinitions="Auto,*">
           <TextBlock Grid.Column="0"
                      Text="{DynamicResource Text.Repository.Search.By}"

src/Views/Repository.axaml.cs

@@ -29,11 +29,33 @@ namespace SourceGit.Views
 
         private void OnSearchKeyDown(object _, KeyEventArgs e)
         {
+            var repo = DataContext as ViewModels.Repository;
             if (e.Key == Key.Enter)
             {
-                if (DataContext is ViewModels.Repository repo && !string.IsNullOrWhiteSpace(repo.SearchCommitFilter))
+                if (!string.IsNullOrWhiteSpace(repo.SearchCommitFilter))
                     repo.StartSearchCommits();
 
+                e.Handled = true;
+            }
+            else if (e.Key == Key.Down)
+            {
+                if (repo.IsSearchCommitSuggestionOpen)
+                {
+                    SearchSuggestionBox.Focus(NavigationMethod.Tab);
+                    SearchSuggestionBox.SelectedIndex = 0;
+                }
+                    
+
+                e.Handled = true;
+            }
+            else if (e.Key == Key.Escape)
+            {
+                if (repo.IsSearchCommitSuggestionOpen)
+                {
+                    repo.SearchCommitFilterSuggestion.Clear();
+                    repo.IsSearchCommitSuggestionOpen = false;
+                }
+
                 e.Handled = true;
             }
         }
@@ -272,5 +294,37 @@ namespace SourceGit.Views
                 }
             }
         }
+
+        private void OnSearchSuggestionBoxKeyDown(object sender, KeyEventArgs e) 
+        {
+            var repo = DataContext as ViewModels.Repository;
+            if (e.Key == Key.Escape)
+            {
+                repo.IsSearchCommitSuggestionOpen = false;
+                repo.SearchCommitFilterSuggestion.Clear();
+
+                e.Handled = true;
+            }
+            else if (e.Key == Key.Enter && SearchSuggestionBox.SelectedItem is string content)
+            {
+                repo.SearchCommitFilter = content;
+                TxtSearchCommitsBox.CaretIndex = content.Length;
+                repo.StartSearchCommits();
+                e.Handled = true;
+            }
+        }
+
+        private void OnSearchSuggestionDoubleTapped(object sender, TappedEventArgs e) 
+        {
+            var repo = DataContext as ViewModels.Repository;
+            var content = (sender as StackPanel)?.DataContext as string;
+            if (!string.IsNullOrEmpty(content))
+            {
+                repo.SearchCommitFilter = content;
+                TxtSearchCommitsBox.CaretIndex = content.Length;
+                repo.StartSearchCommits();
+            }
+            e.Handled = true;
+        }
     }
 }