Re: move_it_vertically_backward question

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

> Why cannot it?

For example, if it has reached the beginning of the buffer, it doesn't
make any sense to move further back.

> The former.  In general, very little code in Emacs accesses buffer
> text outside of the current restriction; the display code in its
> entirety certainly doesn't.  You need to manually widen the buffer to
> do so.  One of the few exceptions is the display-line-numbers feature,
> in one of its optional formats of displaying line numbers, where the
> user _wants_ it to ignore the narrowing.

Thanks.