GNU bug report logs -
#28339
25.2; Emacs shows ZWNJ character (Zero Width non-Joiner) as Space
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Reported by: Nima Aryan <nimawebgard <at> gmail.com>
Date: Sun, 3 Sep 2017 16:41:01 UTC
Severity: normal
Found in version 25.2
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
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Message #83 received at 28339 <at> debbugs.gnu.org (full text, mbox):
>> From: Benjamin Riefenstahl <b.riefenstahl <at> turtle-trading.net>
>> I thought that with OpenType at least that depends on the font?
Eli Zaretskii writes:
> It does, but Handa-san seems to say that even the best fonts don't
> consider ZWNJ part of any grapheme cluster, and always leave it alone.
It breaks shaping and ligatures, so the result is not a cluster by
definition, I think. To the contrary, it breaks the cluster. Or maybe
the terminology confuses me.
>> For editing, I would like a hair-line type glyph to delete.
>
> We already have a solution for deleting a character which was composed
> with the preceding one(s). So I think this aspects doesn't have to be
> a factor in our decision how to display ZWNJ.
What I mean is, I would want to see something that I can delete (and
re-add) on its own, with the only other conseqence that the neighboring
characters change shape.
>> * Hightlighting ZWNJ in read-only text while searching for it with
>> incremental search.
>
> In general, search should ignore ZWNJ and similar controls, at least
> the "folding" search.
I was thinking about searching explicitly for ZWNJ, e.g. to find and
delete wrong uses, or to find out how another auther has achieved a
particular effect.
>> * User-specified replacement via display tables.
>
> We already have the glyphless-char-display-control feature for that.
Right, I was thinking, if I wanted to implement ZWNJ as a glyph and I
did not want to rely on the font to provide a glyph, I would create my
own glyph and use that. But I would want the user to be able to replace
it.
benny
This bug report was last modified 4 years and 259 days ago.
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