GNU bug report logs -
#13277
24.2.91; -nw display bug with overlay-arrow
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Reported by: Andreas Schwab <schwab <at> linux-m68k.org>
Date: Tue, 25 Dec 2012 18:16:02 UTC
Severity: normal
Found in version 24.2.91
Done: Eli Zaretskii <eliz <at> gnu.org>
Bug is archived. No further changes may be made.
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Report forwarded
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bug-gnu-emacs <at> gnu.org
:
bug#13277
; Package
emacs
.
(Tue, 25 Dec 2012 18:16:02 GMT)
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Acknowledgement sent
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Andreas Schwab <schwab <at> linux-m68k.org>
:
New bug report received and forwarded. Copy sent to
bug-gnu-emacs <at> gnu.org
.
(Tue, 25 Dec 2012 18:16:02 GMT)
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
This is a regression from emacs 23, already present in 24.1:
$ cat bug.el
(set (make-local-variable 'overlay-arrow-string) "=>")
(set (make-local-variable 'overlay-arrow-position) (point-marker))
;;(setq truncate-lines t)
(insert-char ?- (window-width))
(goto-char (point-min))
$ emacs -nw -l ./bug.el
The cursor is placed at the right margin. Either moving forward two
characters or deleting one character (so that the line fits in the
window) puts the cursor after the arrow, where it belongs.
Andreas.
--
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
Information forwarded
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bug-gnu-emacs <at> gnu.org
:
bug#13277
; Package
emacs
.
(Tue, 25 Dec 2012 19:05:02 GMT)
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Message #8 received at 13277 <at> debbugs.gnu.org (full text, mbox):
> From: Andreas Schwab <schwab <at> linux-m68k.org>
> Date: Tue, 25 Dec 2012 19:13:44 +0100
>
> This is a regression from emacs 23, already present in 24.1:
>
> $ cat bug.el
> (set (make-local-variable 'overlay-arrow-string) "=>")
> (set (make-local-variable 'overlay-arrow-position) (point-marker))
> ;;(setq truncate-lines t)
> (insert-char ?- (window-width))
> (goto-char (point-min))
> $ emacs -nw -l ./bug.el
>
> The cursor is placed at the right margin. Either moving forward two
> characters or deleting one character (so that the line fits in the
> window) puts the cursor after the arrow, where it belongs.
It's a consequence of the bidirectional display, under which we can no
longer assume that, if point is at position P, and that position is
not visible, the cursor should be put on the first visible glyph whose
position is >= P. (In this case, the first 2 characters are obscured
by the overlay arrow, and don't appear on the line.)
I will look into fixing this soon. Thanks for reporting this.
Reply sent
to
Eli Zaretskii <eliz <at> gnu.org>
:
You have taken responsibility.
(Thu, 27 Dec 2012 17:34:01 GMT)
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Andreas Schwab <schwab <at> linux-m68k.org>
:
bug acknowledged by developer.
(Thu, 27 Dec 2012 17:34:01 GMT)
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Message #13 received at 13277-done <at> debbugs.gnu.org (full text, mbox):
> Date: Tue, 25 Dec 2012 21:03:22 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> Cc: 13277 <at> debbugs.gnu.org
>
> > From: Andreas Schwab <schwab <at> linux-m68k.org>
> > Date: Tue, 25 Dec 2012 19:13:44 +0100
> >
> > This is a regression from emacs 23, already present in 24.1:
> >
> > $ cat bug.el
> > (set (make-local-variable 'overlay-arrow-string) "=>")
> > (set (make-local-variable 'overlay-arrow-position) (point-marker))
> > ;;(setq truncate-lines t)
> > (insert-char ?- (window-width))
> > (goto-char (point-min))
> > $ emacs -nw -l ./bug.el
> >
> > The cursor is placed at the right margin. Either moving forward two
> > characters or deleting one character (so that the line fits in the
> > window) puts the cursor after the arrow, where it belongs.
>
> It's a consequence of the bidirectional display, under which we can no
> longer assume that, if point is at position P, and that position is
> not visible, the cursor should be put on the first visible glyph whose
> position is >= P. (In this case, the first 2 characters are obscured
> by the overlay arrow, and don't appear on the line.)
Should be fixed in revision 111082 on the emacs-24 branch. (The fix
is a simple one-liner, and is so obviously correct that it can only
cause problems if it exposes another bug, so I think it's appropriate
for the branch.)
bug archived.
Request was from
Debbugs Internal Request <help-debbugs <at> gnu.org>
to
internal_control <at> debbugs.gnu.org
.
(Fri, 25 Jan 2013 12:24:04 GMT)
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This bug report was last modified 11 years and 102 days ago.
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