undo method

void undo()

revocar

Implementation

void undo() {
//    print(_undoList);
  if (_undoList.isNotEmpty) {
    _redoList.add(_undoList.last);
    _undoList.removeLast();
    if (_undoList.isNotEmpty) {
      _textEditingController.value = TextEditingValue(
        text: _undoList.last.text,
        selection: TextSelection(
            extentOffset: _undoList.last.position,
            baseOffset: _undoList.last.position),
      );
    } else {
      _textEditingController.value = TextEditingValue(
        text: initContent,
        selection: TextSelection(
            extentOffset: initContent.length, baseOffset: initContent.length),
      );
    }
  }
}