Attempting to control the comment ability

Author: StanleyGoldman

src/GitHub.InlineReviews/ViewModels/InlineCommentPeekViewModel.cs

@@ -40,6 +40,7 @@ public sealed class InlineCommentPeekViewModel : ReactiveObject, IDisposable
         ITrackingPoint triggerPoint;
         string relativePath;
         DiffSide side;
+        bool availableForComment;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="InlineCommentPeekViewModel"/> class.
@@ -87,6 +88,12 @@ public InlineCommentPeekViewModel(IInlineCommentPeekService peekService,
                 Observable.Return(previousCommentCommand.Enabled));
         }
 
+        public bool AvailableForComment
+        {
+            get { return availableForComment; }
+            private set { this.RaiseAndSetIfChanged(ref availableForComment, value); }
+        }
+
         /// <summary>
         /// Gets the annotations displayed.
         /// </summary>
@@ -186,6 +193,11 @@ async Task UpdateThread()
             var lineAndLeftBuffer = peekService.GetLineNumber(peekSession, triggerPoint);
             var lineNumber = lineAndLeftBuffer.Item1;
             var leftBuffer = lineAndLeftBuffer.Item2;
+
+            AvailableForComment =
+                file.Diff.Any(chunk => chunk.Lines
+                    .Any(line => line.NewLineNumber == lineNumber));
+
             var thread = file.InlineCommentThreads?.FirstOrDefault(x =>
                 x.LineNumber == lineNumber &&
                 ((leftBuffer && x.DiffLineType == DiffChangeType.Delete) || (!leftBuffer && x.DiffLineType != DiffChangeType.Delete)));

src/GitHub.InlineReviews/Views/InlineCommentPeekView.xaml

@@ -113,7 +113,9 @@
                     </ItemsControl.ItemTemplate>
                 </ItemsControl>
 
-                <ghfvs:CommentThreadView x:Name="threadView" DataContext="{Binding Thread}"/>
+                <ghfvs:CommentThreadView x:Name="threadView"
+                                         Visibility="{Binding AvailableForComment, Converter={ghfvs:BooleanToVisibilityConverter}}"
+                                         DataContext="{Binding Thread}"/>
             </StackPanel>
         </ScrollViewer>
     </DockPanel>