From: Juri Linkov <juri@linkov.net>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: "Pål Grønås Drange" <paal.drange@gmail.com>, 20070@debbugs.gnu.org
Subject: bug#20070: 24.3; have commands such as downcase-region act on a rectangle region
Date: Sun, 15 Mar 2015 22:34:02 +0200 [thread overview]
Message-ID: <87h9tmov9h.fsf@mail.linkov.net> (raw)
In-Reply-To: <jwvmw3fo8hf.fsf-monnier+emacsbugs@gnu.org> (Stefan Monnier's message of "Sat, 14 Mar 2015 12:31:08 -0400")
> Indeed, same problem as kill-region, to which I had to add a `region'
> argument (which basically says "we're called interactively so use
> whatever is the region rather than BEG and END").
Then maybe support for the rectangular region should be introduced
to every command by adding a new argument `region' with a list of pairs
((BEG1 . END1) (BEG2 . END2) ...) and keeping the existing arguments
BEG and END unchanged?
> Obviously, there will be many more commands that need to be adjusted to
> the extended notion of "region" which can now be composed of various extents.
> I'm not sure we need/want a new "R", because I think all cases of "r"
> are currently broken when the region is non contiguous (i.e. they all
> need to use "the new system").
>
> One way to handle it generically, is to change call-interactively such
> that when the argument is "r", the command is called once for each
> "extent". Obviously, this won't work correctly for all cases, tho.
Also this won't work for commands that use region-beginning/region-end
in the interactive spec (like query-replace for bug#13178/bug#19829).
So while fixing the commands one by one, after fixing every command
it needs to be marked as "supporting the rectangular region". If the
command used region-beginning and region-end, this means changing them to
e.g. plural region-beginnings and region-ends.
> Another option is to make "r" behave along the lines of your "R" (tho
> I much prefer a list of pairs than a pair of lists, so one of the two
> args would end up "useless").
Yes, the worst part of this feature is that commands should keep
two existing arguments BEG and END, and either add a new meaning to them,
(while supporting their current values as numbers for backward-compatibility),
or add a new optional argument.
next prev parent reply other threads:[~2015-03-15 20:34 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-10 1:06 bug#20070: 24.3; have commands such as downcase-region act on a rectangle region Pål Grønås Drange
2015-03-11 20:28 ` Stefan Monnier
2015-03-12 19:23 ` Juri Linkov
2015-03-14 16:31 ` Stefan Monnier
2015-03-15 20:34 ` Juri Linkov [this message]
2015-03-15 20:41 ` Eli Zaretskii
2015-03-16 11:49 ` Nicolas Richard
2015-03-16 13:14 ` Stefan Monnier
2015-03-16 20:55 ` Juri Linkov
2015-03-16 22:07 ` Stefan Monnier
2015-03-16 13:19 ` Stefan Monnier
2015-03-16 20:58 ` Juri Linkov
2015-03-16 22:08 ` Stefan Monnier
2015-03-17 19:38 ` Juri Linkov
2015-03-25 0:37 ` Stefan Monnier
2015-03-25 21:42 ` Juri Linkov
2015-03-17 7:10 ` Eli Zaretskii
2015-06-30 20:44 ` Juri Linkov
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