protected bool DoNavigate(BackgroundWorker worker, object objArgument)
        {
            try
            {
                var mode = (MatchNavigationMode)objArgument;

                _views.InvokeOnMatchNavigate(mode, _regExp, worker);
            }
            catch (Exception ex)
            {
                MainForm.ShowExceptionMessage(ex);
            }

            return(true);
        }