GNU bug report logs - #13521
`sort-lines' on the empty region

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Message #58 received at 13521 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Drew Adams <drew.adams <at> oracle.com>
Cc: xfq.free <at> gmail.com, rgm <at> gnu.org, stefan <at> marxist.se,
 monnier <at> iro.umontreal.ca, 13521 <at> debbugs.gnu.org
Subject: Re: bug#13521: `sort-lines' on the empty region
Date: Sat, 05 Sep 2020 18:37:00 +0300

> Date: Sat, 5 Sep 2020 08:22:58 -0700 (PDT)
> From: Drew Adams <drew.adams <at> oracle.com>
> Cc: stefan <at> marxist.se, xfq.free <at> gmail.com, rgm <at> gnu.org,
>         monnier <at> iro.umontreal.ca, 13521 <at> debbugs.gnu.org
> 
> > > I doubt that someone who has `transient-mark-mode' off
> > > would ever want commands such as `flush-lines' and
> > > `sort-lines' to act on the region.  And if they did, I
> > > expect they'd just narrow to it.
> > 
> > Please don't doubt, and please don't impose unnecessary commands on
> > users who have transient-mark-mode off.
> 
> Please don't claim that I imposed any commands on anyone.

You expected them to narrow the buffer.  That takes additional
commands.

> The region is nearly always present and usually nonempty.
> A user with `transient-mark-mode' off would typically
> (IMHO) be bothered if `flush-lines' started always acting
> on the region (it would be almost always: whenever there's
> a mark in the buffer and the region is nonempty). 

So maybe flush-lines needs a separate solution, or none at all.  This
bug is about sort-lines, so flush-lines is a tangent.

> And I think "the important point here" is that a command
> that behaves differently when the region is active should
> NOT act on the region when `transient-mark-mode' is off.

That's not really relevant here.  We are talking about commands which
by virtue of their 'interactive' spec work on the region.  Such
commands shouldn't depend on the region being active.

> This was not the case for `sort-lines', as you point out.
> It did NOT, and does not, behave differently when the
> region is active from when it is inactive.

The proposed change would have made it behave differently, which is
why I've pointed that out.

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