bug#50403: 27.2; calc-grab-region should check rectangle-mark-mode

[Lars Ingebrigtsen]

Mattias Engdegård <mattiase@acm.org> writes:

> 6 sep. 2021 kl. 11.19 skrev Lars Ingebrigtsen <larsi@gnus.org>:
>
>> I think that sounds reasonable, but I don't use calc much myself.  I've
>> added Mattias to the CCs; perhaps he has an opinion here.
>
> Only that he agrees with the previous speakers!

OK; I've now pushed this change to Emacs 28.

> For that matter, in an ideal world the Emacs region/selection would be:
>
> (1) independent of point and mark
> (2) of arbitrary shape (linear, rectangular, possibly discontiguous)
> (3) represented by an abstract object type in Lisp
>
> and all operations on the region should be able to cope with any
> shape, with useful behaviour for special cases.

Indeed.  It's a bit ad hoc currently.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no