How to automate typing in the super_editor document?

[orestesgaolin]

I would like to implement "autotype" feature in the app using super_editor.

Assuming I have an empty document created as follows, how can I perform autotype at the end of the document or current selection (whichever is more approachable). I found that you built TypingRobot, but it uses TextEditingController which is not explicitly accessible in this case.

class _EmailEditorViewState extends State<EmailEditorView> {
  final GlobalKey _docLayoutKey = GlobalKey();

  late MutableDocument _document;
  late Editor _docEditor;
  late MutableDocumentComposer _composer;

  late FocusNode _editorFocusNode;
  late ScrollController _scrollController;

  @override
  void initState() {
    super.initState();
    _document = deserializeMarkdownToDocument(widget.initialContent)
      ..addListener(_onDocumentChange);
    _composer = MutableDocumentComposer();
    _docEditor =
        createDefaultDocumentEditor(document: _document, composer: _composer);
    _editorFocusNode = FocusNode();
    _scrollController = ScrollController();
  }

  void _onDocumentChange(DocumentChangeLog changelog) {
    final mkdown = serializeDocumentToMarkdown(_document);
    widget.onUpdate(context, mkdown);
  }

  @override
  void dispose() {
    _document.dispose();
    _docEditor.dispose();
    _composer.dispose();
    _editorFocusNode.dispose();
    _scrollController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return SuperEditor(
      editor: _docEditor,
      document: _document,
      composer: _composer,
      focusNode: _editorFocusNode,
      scrollController: _scrollController,
      documentLayoutKey: _docLayoutKey,
      stylesheet: getStylesheet(MediaQuery.platformBrightnessOf(context)),
      selectionStyle: defaultSelectionStyle,
      documentOverlayBuilders: [
        DefaultCaretOverlayBuilder(
          caretStyle: const CaretStyle().copyWith(
            color: MacosTheme.of(context).brightness == Brightness.light
                ? Colors.black
                : Colors.white,
            width: 2.5,
          ),
        ),
      ],
    );
  }
}