From: Eli Zaretskii <eliz@gnu.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: 12872@debbugs.gnu.org
Subject: bug#12872: 24.2; Provide a feature to trigger mode-line redisplay
Date: Sun, 05 Dec 2021 09:02:43 +0200 [thread overview]
Message-ID: <83zgpf4jqk.fsf@gnu.org> (raw)
In-Reply-To: <87tufoxc10.fsf@gnus.org> (message from Lars Ingebrigtsen on Sat, 04 Dec 2021 23:04:11 +0100)
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 12872@debbugs.gnu.org
> Date: Sat, 04 Dec 2021 23:04:11 +0100
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> >> What flag is that?
> >
> > w->update_mode_line
>
> Oh, I didn't realise that the update_mode_line variable and that field
> were separate things...
update_mode_line is global, affecting all windows.
> >> > The problem is how to set it only when the current line changes. I
> >> > think that's the crux of this issue.
> >>
> >> I must admit I didn't understand what was meant by "when the current
> >> line changes". 😐
> >
> > It means point moves from one physical line to another.
>
> Then it doesn't sound difficult to implement that in an efficient
> manner? Whatever function Drew is using could just put itself in
> post-command-hook and check? Isn't there a line number cache somewhere?
It can be solved that way, yes. But the bug is about allowing to
solve it in a less expensive way. post-command-hook makes Emacs
sluggish, and line-number cache cannot be trusted in Lisp programs
(and is not exposed to Lisp, I think?).
But if we don't want to add such a feature, we can close the bug as
wontfix.
next prev parent reply other threads:[~2021-12-05 7:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-12 18:27 bug#12872: 24.2; Provide a feature to trigger mode-line redisplay Eli Zaretskii
2012-11-12 19:46 ` Eli Zaretskii
2012-11-12 22:17 ` Drew Adams
2012-11-13 3:57 ` Eli Zaretskii
2012-11-13 15:38 ` Drew Adams
2021-12-04 4:46 ` Lars Ingebrigtsen
2021-12-04 7:54 ` Eli Zaretskii
2021-12-04 18:55 ` Lars Ingebrigtsen
2021-12-04 19:26 ` Eli Zaretskii
2021-12-04 19:40 ` Lars Ingebrigtsen
2021-12-04 19:43 ` Eli Zaretskii
2021-12-04 22:04 ` Lars Ingebrigtsen
2021-12-05 7:02 ` Eli Zaretskii [this message]
2021-12-05 20:05 ` Lars Ingebrigtsen
2021-12-05 20:14 ` Eli Zaretskii
2021-12-06 6:00 ` Lars Ingebrigtsen
2021-12-06 13:02 ` Eli Zaretskii
2021-12-07 20:49 ` Lars Ingebrigtsen
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=83zgpf4jqk.fsf@gnu.org \
--to=eliz@gnu.org \
--cc=12872@debbugs.gnu.org \
--cc=larsi@gnus.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).