GNU bug report logs - #71822
Feature request: fullwidth to halfwidth

Previous Next

Full log

View this message in rfc822 format

From: Kazuhiro Ito <kzhr <at> d1.dion.ne.jp>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 71822 <at> debbugs.gnu.org, jidanni <at> jidanni.org
Subject: bug#71822: Feature request: fullwidth to halfwidth
Date: Wed, 12 Mar 2025 07:38:59 +0900

> > > I eventually decided to write new commands, because the above
> > > japanese-* commands are too specific to the Japanese users: for
> > > example, they convert kana characters as well.
> > > 
> > > So there are now new commands fullwidth-region, fullwidth-word,
> > > halfwidth-region, and halfwidth-word, which will be in Emacs 31 when
> > > it is released.
> > 
> > New functions don't seem to handle SPACE (U+0020, ' ') and IDEOGRAPHIC
> > SPACE (U+3000, '　').  U+3000 is used as fullwidth space in CJK
> > languages.
> 
> That's because I didn't know people will want to convert those as part
> of this feature, and so didn't include them in the translation table.
> 
> Is it true that most/all people who type fullwidth characters will
> also type U+3000 instead of an ASCII SPC character?  If so, I will add
> them to the translation table; it's easy.  But if some users would
> like to leave SPC alone, maybe we should have some optional behavior
> or something.

Though I rarely type fullwidth ASCII characters, most Japanese input
methods enable user to input U+3000 via simply typing SPC.  So, U+3000
is often used as alternate of ASCII SPACE.

U+3000 may be used as an indent at the beginning of Japanese
paragraphs.  In this case, U+3000 should be kept, but I doubt we use
halfwidth-* functions for such style Japanese text.

IMO, I expected halfwidth-* functions to convert U+3000 to SPACE as
japanese-hankaku did.  But other Japanese said both behaviors whould
be in demand.  I don't know about other languages.

-- 
Kazuhiro Ito

Previous Next

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