Show the list of children in the commit details (#710)

* feature: add children list to the commit base info view

Useful for navigation between the commits.

* feature: use repository filters to limit children search
* feature: execute children search asynchronously
* feature: respect global commit limit for a good measure
* fix: input lines may contain several commits

The first commit is always the immediate child, so take only 40 initial characters of the line

* fix: hide children behind the preference
* feature: make parents and children scrollable

src/Commands/QueryCommitChildren.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using SourceGit.ViewModels;
+
+namespace SourceGit.Commands
+{
+    public class QueryCommitChildren : Command
+    {
+        public QueryCommitChildren(string repo, string commit, string filters)
+        {
+            WorkingDirectory = repo;
+            Context = repo;
+            _commit = commit;
+            if (string.IsNullOrEmpty(filters))
+                filters = "--all";
+            Args = $"rev-list -{Preference.Instance.MaxHistoryCommits}  --parents {filters} ^{commit}";
+        }
+
+        protected override void OnReadline(string line)
+        {
+            if (line.Contains(_commit))
+                _lines.Add(line.Substring(0, 40));
+        }
+
+        public IEnumerable<string> Result()
+        {
+            Exec();
+            return _lines;
+        }
+
+        private string _commit;
+        private List<string> _lines = new List<string>();
+    }
+}

src/Resources/Locales/en_US.axaml

@@ -125,6 +125,7 @@
   <x:String x:Key="Text.CommitDetail.Info" xml:space="preserve">INFORMATION</x:String>
   <x:String x:Key="Text.CommitDetail.Info.Author" xml:space="preserve">AUTHOR</x:String>
   <x:String x:Key="Text.CommitDetail.Info.Changed" xml:space="preserve">CHANGED</x:String>
+  <x:String x:Key="Text.CommitDetail.Info.Children" xml:space="preserve">CHILDREN</x:String>
   <x:String x:Key="Text.CommitDetail.Info.Committer" xml:space="preserve">COMMITTER</x:String>
   <x:String x:Key="Text.CommitDetail.Info.ContainsIn" xml:space="preserve">Check refs that contains this commit</x:String>
   <x:String x:Key="Text.CommitDetail.Info.ContainsIn.Title" xml:space="preserve">COMMIT IS CONTAINED BY</x:String>
@@ -451,6 +452,7 @@
   <x:String x:Key="Text.Preference.General.Locale" xml:space="preserve">Language</x:String>
   <x:String x:Key="Text.Preference.General.MaxHistoryCommits" xml:space="preserve">History Commits</x:String>
   <x:String x:Key="Text.Preference.General.ShowAuthorTime" xml:space="preserve">Show author time intead of commit time in graph</x:String>
+  <x:String x:Key="Text.Preference.General.ShowChildren" xml:space="preserve">Show children in the comment details</x:String>
   <x:String x:Key="Text.Preference.General.SubjectGuideLength" xml:space="preserve">Subject Guide Length</x:String>
   <x:String x:Key="Text.Preference.Git" xml:space="preserve">GIT</x:String>
   <x:String x:Key="Text.Preference.Git.CRLF" xml:space="preserve">Enable Auto CRLF</x:String>

src/Resources/Locales/fr_FR.axaml

@@ -126,6 +126,7 @@
   <x:String x:Key="Text.CommitDetail.Info" xml:space="preserve">INFORMATIONS</x:String>
   <x:String x:Key="Text.CommitDetail.Info.Author" xml:space="preserve">AUTEUR</x:String>
   <x:String x:Key="Text.CommitDetail.Info.Changed" xml:space="preserve">CHANGÉ</x:String>
+  <x:String x:Key="Text.CommitDetail.Info.Children" xml:space="preserve">ENFANTS</x:String>
   <x:String x:Key="Text.CommitDetail.Info.Committer" xml:space="preserve">COMMITTER</x:String>
   <x:String x:Key="Text.CommitDetail.Info.ContainsIn" xml:space="preserve">Vérifier les références contenant ce commit</x:String>
   <x:String x:Key="Text.CommitDetail.Info.ContainsIn.Title" xml:space="preserve">LE COMMIT EST CONTENU PAR</x:String>

src/ViewModels/CommitDetail.cs

@@ -78,6 +78,12 @@ namespace SourceGit.ViewModels
             }
         }
 
+        public AvaloniaList<string> Children
+        {
+            get;
+            private set;
+        } = new AvaloniaList<string>();
+
         public string SearchChangeFilter
         {
             get => _searchChangeFilter;
@@ -515,6 +521,7 @@ namespace SourceGit.ViewModels
             VisibleChanges = null;
             SelectedChanges = null;
             ViewRevisionFileContent = null;
+            Children.Clear();
 
             if (_commit == null)
                 return;
@@ -535,6 +542,18 @@ namespace SourceGit.ViewModels
                 _cancelToken.Requested = true;
 
             _cancelToken = new Commands.Command.CancelToken();
+
+            if (Preference.Instance.ShowChildren)
+            {
+                Task.Run(() =>
+                {
+                    var cmdChildren = new Commands.QueryCommitChildren(_repo.FullPath, _commit.SHA, _repo.Settings.BuildHistoriesFilter()) { Cancel = _cancelToken };
+                    var children = cmdChildren.Result();
+                    if (!cmdChildren.Cancel.Requested)
+                        Dispatcher.UIThread.Post(() => Children.AddRange(children));
+                });
+            }
+
             Task.Run(() =>
             {
                 var parent = _commit.Parents.Count == 0 ? "4b825dc642cb6eb9a060e54bf8d69288fbee4904" : _commit.Parents[0];

src/ViewModels/Preference.cs

@@ -294,6 +294,12 @@ namespace SourceGit.ViewModels
             set => SetProperty(ref _statisticsSampleColor, value);
         }
 
+        public bool ShowChildren
+        {
+            get => _showChildren;
+            set => SetProperty(ref _showChildren, value);
+        }
+
         public List<RepositoryNode> RepositoryNodes
         {
             get;
@@ -617,5 +623,7 @@ namespace SourceGit.ViewModels
         private string _externalMergeToolPath = string.Empty;
 
         private uint _statisticsSampleColor = 0xFF00FF00;
+
+        private bool _showChildren = false;
     }
 }

src/Views/CommitBaseInfo.axaml

@@ -51,7 +51,7 @@
         <Rectangle Height=".65" Margin="8" Fill="{DynamicResource Brush.Border2}" VerticalAlignment="Center"/>
 
         <!-- Base Information -->
-        <Grid RowDefinitions="24,Auto,Auto,Auto" ColumnDefinitions="96,*">
+        <Grid RowDefinitions="24,Auto,Auto,Auto,Auto" ColumnDefinitions="96,*">
           <!-- SHA -->
           <TextBlock Grid.Row="0" Grid.Column="0" Classes="info_label" Text="{DynamicResource Text.CommitDetail.Info.SHA}" />
           <StackPanel Grid.Row="0" Grid.Column="1" Orientation="Horizontal">
@@ -102,7 +102,8 @@
 
           <!-- PARENTS -->
           <TextBlock Grid.Row="1" Grid.Column="0" Classes="info_label" Text="{DynamicResource Text.CommitDetail.Info.Parents}" IsVisible="{Binding Parents.Count, Converter={x:Static c:IntConverters.IsGreaterThanZero}}"/>
-          <ItemsControl Grid.Row="1" Grid.Column="1" Height="24" Margin="12,0,0,0" ItemsSource="{Binding Parents}" IsVisible="{Binding Parents.Count, Converter={x:Static c:IntConverters.IsGreaterThanZero}}">
+          <ScrollViewer Grid.Row="1" Grid.Column="1" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden" AllowAutoHide="True">
+            <ItemsControl Height="24" Margin="12,0,0,0" ItemsSource="{Binding Parents}" IsVisible="{Binding Parents.Count, Converter={x:Static c:IntConverters.IsGreaterThanZero}}">
               <ItemsControl.ItemsPanel>
                 <ItemsPanelTemplate>
                   <StackPanel Orientation="Horizontal" VerticalAlignment="Center"/>
@@ -142,10 +143,56 @@
                 </DataTemplate>
               </ItemsControl.ItemTemplate>
             </ItemsControl>
+          </ScrollViewer>
+
+          <!-- CHILDREN -->
+          <TextBlock Grid.Row="2" Grid.Column="0" Classes="info_label" Text="{DynamicResource Text.CommitDetail.Info.Children}" IsVisible="{Binding #ThisControl.Children.Count, Converter={x:Static c:IntConverters.IsGreaterThanZero}}"/>
+          <ScrollViewer Grid.Row="2" Grid.Column="1" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden" AllowAutoHide="True">
+            <ItemsControl Height="24" Margin="12,0,0,0" ItemsSource="{Binding #ThisControl.Children}" IsVisible="{Binding #ThisControl.Children.Count, Converter={x:Static c:IntConverters.IsGreaterThanZero}}">
+              <ItemsControl.ItemsPanel>
+                <ItemsPanelTemplate>
+                  <StackPanel Orientation="Horizontal" VerticalAlignment="Center"/>
+                </ItemsPanelTemplate>
+              </ItemsControl.ItemsPanel>
+
+              <ItemsControl.ItemTemplate>
+                <DataTemplate>
+                  <TextBlock Classes="primary"
+                             Text="{Binding Converter={x:Static c:StringConverters.ToShortSHA}}"
+                             Foreground="DarkOrange"
+                             TextDecorations="Underline"
+                             Cursor="Hand"
+                             Margin="0,0,16,0"
+                             PointerEntered="OnSHAPointerEntered"
+                             PointerPressed="OnSHAPressed">
+                    <TextBlock.Styles>
+                      <Style Selector="ToolTip">
+                        <Setter Property="MaxWidth" Value="600"/>
+                      </Style>
+                    </TextBlock.Styles>
+
+                    <TextBlock.DataTemplates>
+                      <DataTemplate DataType="m:Commit">
+                        <StackPanel MinWidth="400" Orientation="Vertical">
+                          <Grid ColumnDefinitions="Auto,*,Auto">
+                            <v:Avatar Grid.Column="0" Width="16" Height="16" VerticalAlignment="Center" IsHitTestVisible="False" User="{Binding Author}"/>
+                            <TextBlock Grid.Column="1" Classes="primary" Text="{Binding Author.Name}" Margin="8,0,0,0"/>
+                            <TextBlock Grid.Column="2" Classes="primary" Text="{Binding CommitterTimeStr}" Foreground="{DynamicResource Brush.FG2}" Margin="8,0,0,0"/>
+                          </Grid>
+
+                          <TextBlock Classes="primary" Margin="0,8,0,0" Text="{Binding Subject}" TextWrapping="Wrap"/>
+                        </StackPanel>
+                      </DataTemplate>
+                    </TextBlock.DataTemplates>
+                  </TextBlock>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+          </ScrollViewer>
 
           <!-- REFS -->
-          <TextBlock Grid.Row="2" Grid.Column="0" Classes="info_label" Text="{DynamicResource Text.CommitDetail.Info.Refs}" IsVisible="{Binding HasDecorators}"/>
+          <TextBlock Grid.Row="3" Grid.Column="0" Classes="info_label" Text="{DynamicResource Text.CommitDetail.Info.Refs}" IsVisible="{Binding HasDecorators}"/>
-          <Border Grid.Row="2" Grid.Column="1" Margin="12,0,0,0" Height="24" IsVisible="{Binding HasDecorators}">
+          <Border Grid.Row="3" Grid.Column="1" Margin="12,0,0,0" Height="24" IsVisible="{Binding HasDecorators}">
             <v:CommitRefsPresenter TagBackground="{DynamicResource Brush.DecoratorTag}"
                                    Foreground="{DynamicResource Brush.FG1}"
                                    FontFamily="{DynamicResource Fonts.Primary}"
@@ -155,8 +202,8 @@
           </Border>
 
           <!-- Messages -->
-          <TextBlock Grid.Row="3" Grid.Column="0" Classes="info_label" Text="{DynamicResource Text.CommitDetail.Info.Message}" VerticalAlignment="Top" Margin="0,4,0,0" />
+          <TextBlock Grid.Row="4" Grid.Column="0" Classes="info_label" Text="{DynamicResource Text.CommitDetail.Info.Message}" VerticalAlignment="Top" Margin="0,4,0,0" />
-          <v:CommitMessagePresenter Grid.Row="4" Grid.Column="1" 
+          <v:CommitMessagePresenter Grid.Row="5" Grid.Column="1" 
                                     Margin="12,5,8,0" 
                                     Classes="primary" 
                                     Message="{Binding #ThisControl.Message}"

src/Views/CommitBaseInfo.axaml.cs

@@ -55,6 +55,15 @@ namespace SourceGit.Views
             set => SetValue(IssueTrackerRulesProperty, value);
         }
 
+        public static readonly StyledProperty<AvaloniaList<string>> ChildrenProperty =
+            AvaloniaProperty.Register<CommitBaseInfo, AvaloniaList<string>>(nameof(Children));
+
+        public AvaloniaList<string> Children
+        {
+            get => GetValue(ChildrenProperty);
+            set => SetValue(ChildrenProperty, value);
+        }
+
         public CommitBaseInfo()
         {
             InitializeComponent();

src/Views/CommitDetail.axaml

@@ -24,6 +24,7 @@
                             SignInfo="{Binding SignInfo}"
                             SupportsContainsIn="True"
                             WebLinks="{Binding WebLinks}"
+                            Children="{Binding Children}"
                             IssueTrackerRules="{Binding IssueTrackerRules}"/>
 
           <!-- Line -->

src/Views/Preference.axaml

@@ -45,7 +45,7 @@
           <TabItem.Header>
             <TextBlock Classes="tab_header" Text="{DynamicResource Text.Preference.General}"/>
           </TabItem.Header>
-          <Grid Margin="8" RowDefinitions="32,32,32,32,32,32" ColumnDefinitions="Auto,*">
+          <Grid Margin="8" RowDefinitions="32,32,32,32,32,32,32" ColumnDefinitions="Auto,*">
             <TextBlock Grid.Row="0" Grid.Column="0"
                        Text="{DynamicResource Text.Preference.General.Locale}"
                        HorizontalAlignment="Right"
@@ -114,6 +114,11 @@
                       Height="32"
                       Content="{DynamicResource Text.Preference.General.Check4UpdatesOnStartup}"
                       IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=Check4UpdatesOnStartup, Mode=TwoWay}"/>
+
+            <CheckBox Grid.Row="6" Grid.Column="1"
+                      Height="32"
+                      Content="{DynamicResource Text.Preference.General.ShowChildren}"
+                      IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=ShowChildren, Mode=TwoWay}"/>
           </Grid>
         </TabItem>