GNU bug report logs - #12054
24.1; regression? font-lock no-break-space with nil nobreak-char-display

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Package: emacs;

Reported by: "Drew Adams" <drew.adams <at> oracle.com>

Date: Thu, 26 Jul 2012 05:51:02 UTC

Severity: normal

Found in version 24.1

Done: Chong Yidong <cyd <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #11 received at 12054 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> gnu.org>
To: "Drew Adams" <drew.adams <at> oracle.com>
Cc: 12054 <at> debbugs.gnu.org
Subject: Re: bug#12054: 24.1;
	regression? font-lock no-break-space with nil nobreak-char-display
Date: Sat, 03 Nov 2012 18:50:53 +0800

"Drew Adams" <drew.adams <at> oracle.com> writes:

> (defface foo '((t (:background "Yellow"))) "" :group 'faces)
> (setq nobreak-char-display nil)
> (font-lock-add-keywords nil '(("[\240]+" (0 'foo t))) 'APPEND)
>  
> Insert a no-break space:
> C-x 8 RET no-break-space (or C-q 240 RET)
>  
> Turn font-lock-mode off, then back on.
>  
> With point before the no-break-space, C-u C-x =.  That shows that the
> character is indeed a no-break-space, and there is no face on it.

"[\240]+" doesn't do what you want.  Octal 240 is a unibyte character,
so that string constant specifies a unibyte string.  When this unibyte
string is converted to multibyte, the raw byte becomes codepoint
#x3ffa0.

You should use either of these instead:

(font-lock-add-keywords nil '(("[\u00a0]+" (0 'foo t))) 'APPEND)
(font-lock-add-keywords nil '(("[ ]+" (0 'foo t))) 'APPEND)
This bug report was last modified 12 years and 202 days ago.

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