add SimplifyByDecoration mode

Fixes #1595

Author: heartacker

src/Models/RepositorySettings.cs

@@ -14,6 +14,12 @@ public string DefaultRemote
             set;
         } = string.Empty;
 
+        public bool SimplifyByDecoration
+        {
+            get;
+            set;
+        } = false;
+
         public bool EnableReflog
         {
             get;

src/Resources/Locales/en_US.axaml

@@ -670,6 +670,7 @@
   <x:String x:Key="Text.Repository.Search.InCurrentBranch" xml:space="preserve">Current Branch</x:String>
   <x:String x:Key="Text.Repository.ShowFirstParentOnly" xml:space="preserve">Show first-parent only</x:String>
   <x:String x:Key="Text.Repository.ShowLostCommits" xml:space="preserve">Show lost commits</x:String>
+  <x:String x:Key="Text.Repository.SimplifyByDecoration" xml:space="preserve">Show Decorate Commits Only</x:String>
   <x:String x:Key="Text.Repository.ShowSubmodulesAsTree" xml:space="preserve">Show Submodules as Tree</x:String>
   <x:String x:Key="Text.Repository.ShowTagsAsTree" xml:space="preserve">Show Tags as Tree</x:String>
   <x:String x:Key="Text.Repository.Skip" xml:space="preserve">SKIP</x:String>

src/ViewModels/Repository.cs

@@ -91,6 +91,20 @@ public object SelectedView
             set => SetProperty(ref _selectedView, value);
         }
 
+        public bool SimplifyByDecoration
+        {
+            get => _settings.SimplifyByDecoration;
+            set
+            {
+                if (value != _settings.SimplifyByDecoration)
+                {
+                    _settings.SimplifyByDecoration = value;
+                    OnPropertyChanged();
+                    Task.Run(RefreshCommits);
+                }
+            }
+        }
+
         public bool EnableReflog
         {
             get => _settings.EnableReflog;
@@ -1271,6 +1285,9 @@ public void RefreshCommits()
                 builder.Append("--reflog ");
             if (_settings.EnableFirstParentInHistories)
                 builder.Append("--first-parent ");
+            // only show commits with decorators
+            if (_settings.SimplifyByDecoration)
+                builder.Append("--simplify-by-decoration ");
 
             var filters = _settings.BuildHistoriesFilter();
             if (string.IsNullOrEmpty(filters))

src/Views/Repository.axaml

@@ -83,7 +83,7 @@
               </ListBox.ItemsPanel>
 
               <ListBoxItem>
-                <Grid Classes="view_mode" ColumnDefinitions="Auto,*,Auto,Auto,Auto,Auto,Auto">
+                <Grid Classes="view_mode" ColumnDefinitions="Auto,*,Auto,Auto,Auto,Auto,Auto,Auto">
                   <Path Grid.Column="0" Classes="icon" Data="{StaticResource Icons.Histories}"/>
                   <TextBlock Grid.Column="1" Classes="header" Text="{DynamicResource Text.Histories}"/>
 
@@ -131,7 +131,21 @@
                                 ToolTip.Tip="{DynamicResource Text.Repository.UseRelativeTimeInGraph}">
                     <Path Width="12" Height="12" Data="{StaticResource Icons.Stopwatch}"/>
                   </ToggleButton>
-                  <Button Grid.Column="6"
+                  <ToggleButton Grid.Column="6"
+                                Classes="line_path"
+                                Width="26" Height="26"
+                                Background="Transparent"
+                                IsChecked="{Binding SimplifyByDecoration, Mode=TwoWay}">
+                      <ToolTip.Tip>
+                        <TextBlock>
+                          <Run Text="{DynamicResource Text.Repository.SimplifyByDecoration}"/>
+                          <Run Text=" "/>
+                          <Run Text="--simplify-by-decoration" FontSize="11" Foreground="{DynamicResource MenuFlyoutItemKeyboardAcceleratorTextForeground}"/>
+                        </TextBlock>
+                      </ToolTip.Tip>
+                      <Path Width="12" Height="12" Data="{StaticResource Icons.Tree}"/>
+                    </ToggleButton>
+                  <Button Grid.Column="7"
                           Classes="icon_button"
                           Width="26" Height="26"
                           Click="OnOpenAdvancedHistoriesOption">