From: Stefan Monnier <monnier@iro.umontreal.ca>
To: rms@gnu.org
Cc: eliz@gnu.org, emacs-devel@gnu.org
Subject: Re: buffer-swap-text
Date: Wed, 22 Oct 2008 23:24:42 -0400 [thread overview]
Message-ID: <jwvbpxcvvy8.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <E1KsqWP-00013X-CT@fencepost.gnu.org> (Richard M. Stallman's message of "Wed, 22 Oct 2008 23:06:01 -0400")
>> We need to address the general question of what C-x C-s should do in a
>> buffer where you have done the swap. I think your question is part of
>> that question.
> This depends on the use case.
> We have seen two use cases, which are somewhat similar.
> What do they do? Is there one approach that would work for both?
> I think we need a feature that lets one buffer point to the other
> and say "save that one instead". And swapping should turn this
> on and off. So when Rmail or Arc mode swaps the buffers, it should
> make the visible buffer point to the other one saying "save that instead".
> And when it unswaps them, it should reverse that, making the hidden buffer
> point to the visible one saying "save that instead".
> So here's the proposed feature.
> 1. A buffer-local variable buffer-save-other-buffer.
> 2. If that is non-nil, it should be a buffer, and `basic-save-buffer'
> saves that buffer instead.
> 3. When `buffer-swap-text' sees that buffer A's
> buffer-save-other-buffer points to buffer B, it "swaps" that, making
> buffer B's buffer-save-other-buffer point to buffer A instead.
> If the mode doesn't use the buffer-save-other-buffer feature, that
> variable will be nil in both buffers, so `buffer-swap-text' won't
> change it.
I don't see any benefit to hardcode this in buffer-swap-text.
We may very well rename buffer-swap-text to buffer-swap-text-internal
and introduce a new buffer-swap-text which can perform such things
(probably using write-region-annotation-function), as well as swap
variables like buffer-file-coding-system.
I'd rather we first get more experience with it to see how it's used
in practice.
Stefan
next prev parent reply other threads:[~2008-10-23 3:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 10:42 buffer-swap-text Eli Zaretskii
2008-10-21 13:56 ` buffer-swap-text Stefan Monnier
2008-10-21 15:30 ` buffer-swap-text Eli Zaretskii
2008-10-21 22:04 ` buffer-swap-text Stefan Monnier
2008-10-21 19:40 ` buffer-swap-text Richard M. Stallman
2008-10-21 22:06 ` buffer-swap-text Stefan Monnier
2008-10-23 3:06 ` buffer-swap-text Richard M. Stallman
2008-10-23 3:24 ` Stefan Monnier [this message]
2008-10-23 21:09 ` buffer-swap-text Richard M. Stallman
2008-10-24 4:05 ` buffer-swap-text Stefan Monnier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=jwvbpxcvvy8.fsf-monnier+emacs@gnu.org \
--to=monnier@iro.umontreal.ca \
--cc=eliz@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=rms@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).