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From: Eli Zaretskii <eliz@gnu.org>
To: tomlevy93@gmail.com
Cc: 38016@debbugs.gnu.org
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	[thread overview]
Message-ID: <83mudflhch.fsf@gnu.org> (raw)
In-Reply-To: <83zhhfloyr.fsf@gnu.org> (message from Eli Zaretskii on Fri, 01 Nov 2019 15:13:00 +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?





  reply	other threads:[~2019-11-01 15:57 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-01  5:11 bug#38016: 27.0.50; Display issues with delay-warning and side-by-side windows in terminal Tom Levy
2019-11-01  7:06 ` Eli Zaretskii
2019-11-01  7:39   ` Tom Levy
2019-11-01  7:46     ` Eli Zaretskii
2019-11-01  9:50       ` Eli Zaretskii
2019-11-01 12:29         ` Tom Levy
2019-11-01 13:13           ` Eli Zaretskii
2019-11-01 15:57             ` Eli Zaretskii [this message]
     [not found]   ` <mailman.162.1572592024.13325.bug-gnu-emacs@gnu.org>
2019-11-01 10:20     ` Alan Mackenzie

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