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* bug#42811: 26.1; visual-line-mode wraps at no-break space
@ 2020-08-11 14:03 Marvin ‘quintus’ Gülker
  2020-08-11 15:02 ` Eli Zaretskii
  0 siblings, 1 reply; 4+ messages in thread
From: Marvin ‘quintus’ Gülker @ 2020-08-11 14:03 UTC (permalink / raw)
  To: 42811

Dear maintainer,

the visual-line-mode minor mode wraps lines at non-breaking spaces
(U+000A0 No-Break Space, NBSP: ' '). It should not do that and instead
treat the sequence of characters before and after the NBSP as one
word. That is, if you have:

    Lorem ipsum dolor sit amet
                     ^
                   NBSP

Then visual-line-mode will consider the no-break space between 'dolor'
and 'sit' as a possible wrap point, which is contrary to what a no-break
space is meant to achieve.

To reproduce: enable visual-line-mode, write a document that contains a
NBSP, and shrink the window so that its edge hits the NBSP.
visual-line-mode will break the line at the NBSP, albeit it shouldn't.

  -quintus

In GNU Emacs 26.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.5)
 of 2019-09-23, modified by Debian built on x86-grnet-01
Windowing system distributor 'The X.Org Foundation', version 11.0.12004000
System Description:	Debian GNU/Linux 10 (buster)

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Configured using:
 'configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
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 --mandir=/usr/share/man --enable-libsystemd --with-pop=yes
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Configured features:
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ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
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Important settings:
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  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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Memory information:
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-- 
Dipl.-Jur. M. Gülker | https://mg.guelker.eu |    For security:
Unna, Germany        | kontakt@guelker.eu    | () Avoid HTML e-mail
European Union       | PGP: see homepage     | /\ http://asciiribbon.org





^ permalink raw reply	[flat|nested] 4+ messages in thread

* bug#42811: 26.1; visual-line-mode wraps at no-break space
  2020-08-11 14:03 bug#42811: 26.1; visual-line-mode wraps at no-break space Marvin ‘quintus’ Gülker
@ 2020-08-11 15:02 ` Eli Zaretskii
  2020-08-12  5:59   ` Marvin ‘quintus’ Gülker
  0 siblings, 1 reply; 4+ messages in thread
From: Eli Zaretskii @ 2020-08-11 15:02 UTC (permalink / raw)
  To: Marvin ‘quintus’ Gülker; +Cc: 42811

> From: Marvin ‘quintus’ Gülker
>  <post+ebugs@guelker.eu>
> Date: Tue, 11 Aug 2020 16:03:44 +0200
> 
> To reproduce: enable visual-line-mode, write a document that contains a
> NBSP, and shrink the window so that its edge hits the NBSP.
> visual-line-mode will break the line at the NBSP, albeit it shouldn't.

If you set nobreak-char-display to nil, you get the behavior you want.





^ permalink raw reply	[flat|nested] 4+ messages in thread

* bug#42811: 26.1; visual-line-mode wraps at no-break space
  2020-08-11 15:02 ` Eli Zaretskii
@ 2020-08-12  5:59   ` Marvin ‘quintus’ Gülker
  2020-08-15 10:33     ` Eli Zaretskii
  0 siblings, 1 reply; 4+ messages in thread
From: Marvin ‘quintus’ Gülker @ 2020-08-12  5:59 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 42811

Am Dienstag, dem 11. August 2020 schrieb Eli Zaretskii:
> If you set nobreak-char-display to nil, you get the behavior you want.

Indeed, this works. But now the NBSP is not highlighted anymore as a
special character and I won't notice it is in there. Is there a way to
have both the highlighted display and the no-break behaviour?

  -quintus

-- 
Dipl.-Jur. M. Gülker | https://mg.guelker.eu |    For security:
Unna, Germany        | kontakt@guelker.eu    | () Avoid HTML e-mail
European Union       | PGP: see homepage     | /\ http://asciiribbon.org





^ permalink raw reply	[flat|nested] 4+ messages in thread

* bug#42811: 26.1; visual-line-mode wraps at no-break space
  2020-08-12  5:59   ` Marvin ‘quintus’ Gülker
@ 2020-08-15 10:33     ` Eli Zaretskii
  0 siblings, 0 replies; 4+ messages in thread
From: Eli Zaretskii @ 2020-08-15 10:33 UTC (permalink / raw)
  To: Marvin ‘quintus’ Gülker; +Cc: 42811-done

> From: Marvin ‘quintus’ Gülker
>  <post+ebugs@guelker.eu>
> Cc: 42811@debbugs.gnu.org
> Date: Wed, 12 Aug 2020 07:59:06 +0200
> 
> Am Dienstag, dem 11. August 2020 schrieb Eli Zaretskii:
> > If you set nobreak-char-display to nil, you get the behavior you want.
> 
> Indeed, this works. But now the NBSP is not highlighted anymore as a
> special character and I won't notice it is in there. Is there a way to
> have both the highlighted display and the no-break behaviour?

I made such a change (on the master branch), not without some
trepidation, as the current behavior is very old (15 years), so I
wonder whether some feature relies on that.  We shall see, I guess.

Note that when nobreak-char-display is non-nil and non-t, we still
produce an ASCII space after the backslash-escape, so the display
engine will still wrap at that spot.  But here, I cannot make the same
change, because the Emacs manual clearly documents this behavior.

Thanks.





^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2020-08-15 10:33 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-08-11 14:03 bug#42811: 26.1; visual-line-mode wraps at no-break space Marvin ‘quintus’ Gülker
2020-08-11 15:02 ` Eli Zaretskii
2020-08-12  5:59   ` Marvin ‘quintus’ Gülker
2020-08-15 10:33     ` Eli Zaretskii

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