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bug#38016: 27.0.50; Display issues with delay-warning and side-by-side w
From: |
Eli Zaretskii |
Subject: |
bug#38016: 27.0.50; Display issues with delay-warning and side-by-side windows in terminal |
Date: |
Fri, 01 Nov 2019 17:57:34 +0200 |
> Date: Fri, 01 Nov 2019 15:13:00 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 38016@debbugs.gnu.org
>
> > From: Tom Levy <tomlevy93@gmail.com>
> > Date: Sat, 2 Nov 2019 01:29:22 +1300
> > Cc: 38016@debbugs.gnu.org
> >
> > emacs -Q -nw --eval '(progn
> > (setq truncate-partial-width-windows nil)
> > (setq initial-scratch-message ";; short\n;; message\n\n")
> > (setq split-height-threshold 80)
> > (setq split-width-threshold 20)
> > (delay-warning :debug "line 1\nline 2"))'
> >
> > Results:
> >
> > $LINES first value of $COLUMNS with glitch
> > 18 155
> > 19 149
> > 24 129
> > 37 99
> > 48 89
>
> Thanks, now I see this and will look into it when I have time.
Looks like some weird problem with cursor motion commands Emacs emits
on a TTY. As screen dimension change, Emacs tries to optimize the
commands it sends, and changes the commands it emits to put the cursor
at given display coordinates, see cm.c:cmgoto. Probably related to
bug#24124 (which remains unresolved).
The way to record the commands Emacs sends to the terminal is to
invoke open-termscript. The commands will be in the file this
function gets as its 2nd argument.
We need a terminfo expert to find out what's wrong here. Anyone?
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