GNU bug report logs - #28339
25.2; Emacs shows ZWNJ character (Zero Width non-Joiner) as Space

Previous Next

Full log

View this message in rfc822 format

From: Eli Zaretskii <eliz <at> gnu.org>
To: handa <handa <at> gnu.org>
Cc: b.riefenstahl <at> turtle-trading.net, nimawebgard <at> gmail.com, 28339 <at> debbugs.gnu.org
Subject: bug#28339: 25.2; Emacs shows ZWNJ character (Zero Width non-Joiner) as Space
Date: Wed, 20 Sep 2017 10:25:57 +0300

> From: handa <handa <at> gnu.org>
> Cc: b.riefenstahl <at> turtle-trading.net, nimawebgard <at> gmail.com,
> 	28339 <at> debbugs.gnu.org
> Date: Tue, 19 Sep 2017 21:18:31 +0900
> 
> In article <83h8w0hwa7.fsf <at> gnu.org>, Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> > I don't see this in Unicode, but maybe I'm missing something.
> 
> > Anyway, what would you suggest as a solution to this issue?  Should we
> > install the arabic-font-shape-gstring function into Emacs?  Do we need
> > to do something else in addition?  E.g., do we need to make the
> > display of ZWNJ optional?
> 
> As I don't know what is the right thing, I'm asking here.
> 
> If users never ever want to put cursor on ZWNJ,
> arabic-font-shape-gstring-ZWNJ-absorb is the solution.
> 
> If users want a thin space to be able to handle ZWNJ directly,
> arabic-font-shape-gstring-ZWNJ-as-space is the solution.
> 
> If it depends on a situation or a user's prefernce, it is better to have
> a user customizable variable to switch between them.

Maybe we should go with an option.  I will try to come up with a patch
for that.

> By the way, I've just tried arabic-shape.el on Windows, and found that
> arabic-font-shape-gstring-ZWNJ-as-space worked, which means Windows text
> laout backend on Windows (uniscribe?) also returns ZWNJ glyph.

Yes, it does.

> And, without arabic-font-shape-gstring-ZWNJ-as-space, I see a
> strange cursor display.  Is it the "glitch" you mentioned?

Yes.  Do you understand what is the reason for that?

Thanks.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.