setSelection method
Select a range of text.
Notice that JidoujishoSelectableText.onSelectionChanged won't be called.
Implementation
void setSelection(int start, int end) {
if (_textSpanEditingController == null) {
return;
}
assert(start <= end);
selection = TextSelection(
baseOffset: start,
extentOffset: end,
);
_textSpanEditingController!.value =
_textSpanEditingController!.value.copyWith(selection: selection);
}