From: Eli Zaretskii <eliz@gnu.org>
To: Glenn Morris <rgm@gnu.org>
Cc: 9607@debbugs.gnu.org, david_lawless@flumedata.com
Subject: bug#9607: incorrect behavior with "auto-hscroll-mode nil" in ncurses/vt220 text operation; wrong in 23 but ok in 22.1
Date: Tue, 27 Sep 2011 02:07:20 -0400 [thread overview]
Message-ID: <E1R8Qp6-0006b6-6J@fencepost.gnu.org> (raw)
In-Reply-To: <gg7h4u8wgh.fsf@fencepost.gnu.org> (message from Glenn Morris on Tue, 27 Sep 2011 00:01:50 -0400)
> From: Glenn Morris <rgm@gnu.org>
> Date: Tue, 27 Sep 2011 00:01:50 -0400
> Cc: David Lawless <david_lawless@flumedata.com>
>
> emacs -Q --eval '(setq auto-hscroll-mode nil)'
>
> Evaluate:
> (dotimes (j 5)
> (insert "\n")
> (dotimes (i 10)
> (insert "0123456890 ")))
>
> Put point at start of first line of digits.
> M-x scroll-left RET y
> ;; Window now scrolled to right-hand end of lines
> Down arrow ; first time is ok
> Down arrow
> -> second time window scrolls back to left-hand end of line
>
>
> (setq line-move-visual nil)
>
> avoids the problem.
>
> I guess it's related to the 2009-07 changes to line-move-visual for hscroll.
The problem is that line-move-visual assumes that the move begins with
cursor positioned at point, which is false when auto-hscroll-mode is
turned off and point is scrolled out of view.
Before I dive into this mess (again), do we even want to support
auto-hscroll-mode nil _and_ visual line movement? What if we tell
line-move to invoke logical line movement instead when
auto-hscroll-mode is off? Would someone object?
next prev parent reply other threads:[~2011-09-27 6:07 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <201109262119.p8QLJ5eU004406@siobhan.>
2011-09-26 21:36 ` bug#9607: David Lawless
2011-09-27 0:33 ` bug#9607: incorrect behavior with "automatic-hscroll-mode nil" in ncurses/vt220 text operation; wrong in 23 but ok in 22.1 Glenn Morris
2011-09-27 0:47 ` David Lawless
2011-09-27 2:29 ` Stefan Monnier
2011-09-27 2:43 ` bug#9607: incorrect behavior with "auto-hscroll-mode " David Lawless
2011-09-27 4:01 ` Glenn Morris
2011-09-27 6:07 ` Eli Zaretskii [this message]
2011-09-29 13:06 ` Eli Zaretskii
2011-09-27 3:10 ` bug#9607: incorrect behavior with "auto-hscroll-mode nil" in ncurses/vt220 text operation; wrong in 23.2 but ok in 23.1 David Lawless
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