Allow setting UseAsyncCompletion per view.

Use the new completion in the new editor and old completion in the old editor. We have to hack into Roslyn's IAsyncCompletionService to set the private field accordingly because they don't support setting it per view.

See related https://github.com/dotnet/roslyn/issues/33807

1 files changed, 14 insertions, 0 deletions

diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/DefaultSourceEditorOptions.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/DefaultSourceEditorOptions.cs
index ea63d55f6e..20d0e8cbfc 100644
--- a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/DefaultSourceEditorOptions.cs
+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/DefaultSourceEditorOptions.cs
@@ -945,6 +945,20 @@ namespace MonoDevelop.Ide.Editor
 		}
 
 		public event EventHandler Changed;
+
+		/// <summary>
+		/// This is to allow setting UseAsyncCompletion to true for the Cocoa editor and to false for the Gtk editor.
+		/// Currently Roslyn doesn't allow setting this option per view, so we have to work around.
+		/// See here for details: https://github.com/dotnet/roslyn/issues/33807
+		/// </summary>
+		internal static void SetUseAsyncCompletion(bool useAsyncCompletion)
+		{
+			var asyncCompletionService = Composition.CompositionManager.GetExportedValue<Microsoft.CodeAnalysis.Editor.IAsyncCompletionService> ();
+			var field = asyncCompletionService.GetType ().GetField (
+				"_newCompletionAPIEnabled",
+				System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
+			field.SetValue (asyncCompletionService, useAsyncCompletion);
+		}
 	}
 }