public void SetPresenter(TextPresenter presenter)
{
_subscription?.Dispose();
_subscription = null;
_presenter = presenter;
if (_presenter != null)
{
_subscription = _presenter.GetObservable(TextPresenter.CaretIndexProperty)
.Subscribe(OnCaretIndexChanged);
}
TextViewVisualChanged?.Invoke(this, EventArgs.Empty);
CursorRectangleChanged?.Invoke(this, EventArgs.Empty);
}