GNU bug report logs - #12872
24.2; Provide a feature to trigger mode-line redisplay

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 12872 <at> debbugs.gnu.org
Subject: bug#12872: 24.2; Provide a feature to trigger mode-line redisplay
Date: Mon, 06 Dec 2021 07:00:39 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

> How would that be different from what force-mode-line-update does now?
> It sets the update_mode_line flag for the window's buffer, not just
> for the window, and it also sets a flag to prevent redisplay
> optimizations that could get in the way of the mode-line update.  What
> do you suggest to do instead, and why would that be useful?

Somebody said earlier:

> force-mode-line-update is a blunt weapon, and causes a much more
> thorough redisplay than its name says.

If this isn't accurate, then I guess there's nothing to do here.

> The problem with the update_mode_line flags is that they are
> indiscriminate: the mode line shows a lot of data, each one of it
> changes at different frequencies and due to different triggers.  If we
> want a finer resolution there, we need to make these flags not just
> simple booleans, but enumerations with several values, or maybe
> bitmaps.  Then redisplay_window could be smarter about redrawing parts
> of the mode line.

I think redrawing parts of the mode line would be more work than it's
worth.

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

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