GoToDef.CtrlKeyState.GetStateForView C# (CSharp) Method

        internal static CtrlKeyState GetStateForView(ITextView view)
        {
            return view.Properties.GetOrCreateSingletonProperty(typeof(CtrlKeyState), () => new CtrlKeyState());
        }

        public IMouseProcessor GetAssociatedProcessor(IWpfTextView view)
        {
            var buffer = view.TextBuffer;

            IOleCommandTarget shellCommandDispatcher = GetShellCommandDispatcher(view);

            if (shellCommandDispatcher == null)
            {
                return(null);
            }

            ITelemetrySession   telemetrySession = TelemetrySessionForPPT.Create(typeof(GoToDefMouseHandler).Assembly);
            IVsExtensionManager manager          = _globalServiceProvider.GetService(typeof(SVsExtensionManager)) as IVsExtensionManager;

            if (manager == null)
            {
                return(null);
            }

            IInstalledExtension extension;

            manager.TryGetInstalledExtension("GoToDef", out extension);
            if (extension != null)
            {
                return(null);
            }

            return(new GoToDefMouseHandler(view,
                                           shellCommandDispatcher,
                                           telemetrySession,
                                           _aggregatorFactory.GetClassifier(buffer),
                                           _navigatorService.GetTextStructureNavigator(buffer),
                                           CtrlKeyState.GetStateForView(view)));
        }