AmandaInterface.FileEditorTab._KeyDown C# (CSharp) Метод

        private void _KeyDown(object sender, KeyEventArgs e)
        {
            string allowedChars = "([{}]);,. ";
            int currentLine = textBox.Selection.Bounds.iStartLine;
            string textTillCursor = textBox.GetLineText(currentLine).Substring(0, textBox.Selection.Bounds.iStartChar);
            //string textAfterCursor = tbEditor.GetLineText(currentLine);
            char charBeforeCursor = textBox.Selection.CharBeforeStart;
            char charAfterCursor = textBox.Selection.CharAfterStart;
            if (e.KeyData == (Keys.K | Keys.Control))
            {
                //forced show (MinFragmentLength will be ignored)
                autocomplete.Show(true);
                //e.Handled = true;
            }
            if (System.Char.IsLetter((char)e.KeyValue) //warning, lisp programmer at work
                && textTillCursor.Count() > 0
                && allowedChars.Contains(charBeforeCursor)
                && allowedChars.Contains(charAfterCursor))

            /*&&  cursorIsNotInsideFunctionName
              &&  cursorIsCorrectlyIndented?? perhaps difficult with regex since parsing a language ain't easy
             */
            {
                autocomplete.Show(true);

            }
            UpdateAutocompleteIdentifiers();
        }