feature: add context menu entry Copy to selected REF in commit details panel (#2321)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Views/CommitBaseInfo.axaml

@@ -199,7 +199,8 @@
                                    FontSize="12"
                                    AllowWrap="True"
                                    Margin="0,4,0,0"
-                                   UseGraphColor="False"/>
+                                   UseGraphColor="False"
+                                   PointerReleased="OnCommitRefsPresenterPointerReleased"/>
           </Border>
 
           <!-- Messages -->

src/Views/CommitBaseInfo.axaml.cs

@@ -227,6 +227,33 @@ private async void OnCopyAllCommitMessage(object sender, RoutedEventArgs e)
             e.Handled = true;
         }
 
+        private void OnCommitRefsPresenterPointerReleased(object sender, PointerReleasedEventArgs e)
+        {
+            e.Handled = true;
+
+            if (DataContext is ViewModels.CommitDetail detail &&
+                sender is CommitRefsPresenter presenter &&
+                e.Properties.PointerUpdateKind == PointerUpdateKind.RightButtonReleased)
+            {
+                var decorator = presenter.DecoratorAt(e.GetPosition(presenter));
+                if (decorator != null)
+                {
+                    var copy = new MenuItem();
+                    copy.Icon = this.CreateMenuIcon("Icons.Copy");
+                    copy.Header = App.Text("Copy");
+                    copy.Click += async (_, ev) =>
+                    {
+                        await this.CopyTextAsync(decorator.Name);
+                        ev.Handled = true;
+                    };
+
+                    var menu = new ContextMenu();
+                    menu.Items.Add(copy);
+                    menu.Open(presenter);
+                }
+            }
+        }
+
         private IDisposable _iconResetTimer;
     }
 }

src/Views/CommitRefsPresenter.cs

@@ -119,6 +119,8 @@ public override void Render(DrawingContext context)
             var x = 1.5;
             var y = 0.5;
 
+            context.FillRectangle(Brushes.Transparent, Bounds);
+
             foreach (var item in _items)
             {
                 if (allowWrap && x > 1.5 && x + item.Width > Bounds.Width)