theme: add ThemeOverrides.OpacityForNotMergedCommits to customize the opacity of commits that not belongs (haven't been merged) to current branch in histories (#268)

src/App.axaml.cs

@@ -188,6 +188,8 @@ namespace SourceGit
                     else
                         Models.CommitGraph.SetDefaultPens(overrides.GraphPenThickness);
 
+                    Models.Commit.OpacityForNotMerged = overrides.OpacityForNotMergedCommits;
+
                     app.Resources.MergedDictionaries.Add(resDic);
                     app._themeOverrides = resDic;
                 }

src/Converters/BoolConverters.cs

@@ -1,5 +1,4 @@
 using Avalonia.Data.Converters;
-using Avalonia.Media;
 
 namespace SourceGit.Converters
 {
@@ -7,11 +6,5 @@ namespace SourceGit.Converters
     {
         public static readonly FuncValueConverter<bool, double> ToPageTabWidth =
             new FuncValueConverter<bool, double>(x => x ? 200 : double.NaN);
-
-        public static readonly FuncValueConverter<bool, double> HalfIfFalse =
-            new FuncValueConverter<bool, double>(x => x ? 1 : 0.5);
-
-        public static readonly FuncValueConverter<bool, FontWeight> BoldIfTrue =
-            new FuncValueConverter<bool, FontWeight>(x => x ? FontWeight.Bold : FontWeight.Regular);
     }
 }

src/Models/Commit.cs

@@ -2,11 +2,18 @@
 using System.Collections.Generic;
 
 using Avalonia;
+using Avalonia.Media;
 
 namespace SourceGit.Models
 {
     public class Commit
     {
+        public static double OpacityForNotMerged
+        {
+            get;
+            set;
+        } = 0.5;
+
         public string SHA { get; set; } = string.Empty;
         public User Author { get; set; } = User.Invalid;
         public ulong AuthorTime { get; set; } = 0;
@@ -25,5 +32,8 @@ namespace SourceGit.Models
 
         public bool IsCommitterVisible => !Author.Equals(Committer) || AuthorTime != CommitterTime;
         public bool IsCurrentHead => Decorators.Find(x => x.Type is DecoratorType.CurrentBranchHead or DecoratorType.CurrentCommitHead) != null;
+
+        public double Opacity => IsMerged ? 1 : OpacityForNotMerged;
+        public FontWeight FontWeight => IsCurrentHead ? FontWeight.Bold : FontWeight.Regular;
     }
 }

src/Models/ThemeOverrides.cs

@@ -8,6 +8,7 @@ namespace SourceGit.Models
     {
         public Dictionary<string, Color> BasicColors { get; set; } = new Dictionary<string, Color>();
         public double GraphPenThickness { get; set; } = 2;
+        public double OpacityForNotMergedCommits { get; set; } = 0.5;
         public List<Color> GraphColors { get; set; } = new List<Color>();
     }
 }

src/Views/Histories.axaml

@@ -103,8 +103,8 @@
 
                     <TextBlock Classes="monospace" 
                                Text="{Binding Subject}"
-                               Opacity="{Binding IsMerged, Converter={x:Static c:BoolConverters.HalfIfFalse}}"
+                               Opacity="{Binding Opacity}"
-                               FontWeight="{Binding IsCurrentHead, Converter={x:Static c:BoolConverters.BoldIfTrue}}"/>
+                               FontWeight="{Binding FontWeight}"/>
                   </StackPanel>
                 </Border>
               </DataTemplate>
@@ -124,13 +124,13 @@
                             VerticalAlignment="Center"
                             IsHitTestVisible="False"
                             User="{Binding Author}"
-                            Opacity="{Binding IsMerged, Converter={x:Static c:BoolConverters.HalfIfFalse}}"/>
+                            Opacity="{Binding Opacity}"/>
                   <TextBlock Grid.Column="1" 
                              Classes="monospace"
                              Text="{Binding Author.Name}"
                              Margin="8,0,0,0"
-                             Opacity="{Binding IsMerged, Converter={x:Static c:BoolConverters.HalfIfFalse}}"
+                             Opacity="{Binding Opacity}"
-                             FontWeight="{Binding IsCurrentHead, Converter={x:Static c:BoolConverters.BoldIfTrue}}"/>
+                             FontWeight="{Binding FontWeight}"/>
                 </Grid>
               </DataTemplate>
             </DataGridTemplateColumn.CellTemplate>
@@ -147,8 +147,8 @@
                            Text="{Binding SHA, Converter={x:Static c:StringConverters.ToShortSHA}}"
                            Margin="8,0"
                            HorizontalAlignment="Center"
-                           Opacity="{Binding IsMerged, Converter={x:Static c:BoolConverters.HalfIfFalse}}"
+                           Opacity="{Binding Opacity}"
-                           FontWeight="{Binding IsCurrentHead, Converter={x:Static c:BoolConverters.BoldIfTrue}}"/>
+                           FontWeight="{Binding FontWeight}"/>
               </DataTemplate>
             </DataGridTemplateColumn.CellTemplate>
           </DataGridTemplateColumn>
@@ -169,8 +169,8 @@
                 <v:CommitTimeTextBlock Classes="monospace"
                                        Margin="8,0"
                                        HorizontalAlignment="Center"
-                                       Opacity="{Binding IsMerged, Converter={x:Static c:BoolConverters.HalfIfFalse}}"
+                                       Opacity="{Binding Opacity}"
-                                       FontWeight="{Binding IsCurrentHead, Converter={x:Static c:BoolConverters.BoldIfTrue}}"
+                                       FontWeight="{Binding FontWeight}"
                                        Timestamp="{Binding CommitterTime}"
                                        ShowAsDateTime="{Binding Source={x:Static vm:Preference.Instance}, Path=!DisplayTimeAsPeriodInHistories}"/>
               </DataTemplate>