public static DispatcherOperation MainUpdateContinuation(ICodeView iface1, CustomTextSource4 source)
        {
            return(iface1.Dispatcher.InvokeAsync(() =>
            {
                iface1.CustomTextSource = source;
                Debug.WriteLine("Return from await inner update");

                // ;(int.TryParse("Setting reactangle width to " +new NTComputer ({ff, line) || Device<int>()))};

                iface1.PerformingUpdate = false;
                iface1.InitialUpdate = false;
                iface1.RaiseEvent(new RoutedEventArgs(RoslynCodeBase.RenderCompleteEvent, iface1));
                iface1.Status = CodeControlStatus.Rendered;
                var insertionPoint = iface1.InsertionPoint;
                if (insertionPoint == 0)
                {
                    iface1.InsertionCharInfo = iface1.CharInfos.FirstOrDefault();
                }
            }, DispatcherPriority.Send));
        }
        public static async Task <CustomTextSource4> UpdateFormattedText(ICodeView iface1)
        {
            Debug.WriteLine("Enteirng updateformattedtext " + iface1.PerformingUpdate);
            if (iface1.PerformingUpdate)
            {
                Debug.WriteLine("Already performing update");
                return(null);
            }

            iface1.PerformingUpdate = true;
            iface1.Status           = CodeControlStatus.Rendering;
            iface1.RaiseEvent(new RoutedEventArgs(RoslynCodeControl.RenderStartEvent, iface1));

            var textStorePosition = 0;
            var linePosition      = new Point(iface1.XOffset, 0);

            iface1.TextDestination.Children.Clear();

            var line = 0;

            Debug.WriteLine("Calling inner update");
            // ScrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Disabled;
            var fontFamilyFamilyName = iface1.FontFamily.FamilyNames[XmlLanguage.GetLanguage("en-US")];

            Debug.WriteLine(fontFamilyFamilyName);
            Debug.WriteLine("OutputWidth " + iface1.OutputWidth);
            // not sure what to do here !!
            // Rectangle.Width = OutputWidth + Rectangle.StrokeThickness * 2;
            var emSize     = iface1.FontSize;
            var fontWeight = iface1.FontWeight;
            var customTextSource4Parameters = iface1.CreateDefaultTextSourceArguments();
            var mainUpdateParameters        = new MainUpdateParameters(textStorePosition, line, linePosition,
                                                                       RoslynCodeControl.Formatter, iface1.OutputWidth, iface1.PixelsPerDip, emSize, fontFamilyFamilyName,
                                                                       iface1.UpdateChannel.Writer, fontWeight, iface1.DocumentPaginator, customTextSource4Parameters);
            await iface1.JTF2.SwitchToMainThreadAsync();

            var source = await iface1.InnerUpdateAsync(mainUpdateParameters, customTextSource4Parameters);

            return(source);
        }