Fw: Variation selectors for narrow/wide EastAsian glyphs

From: Werner LEMBERG (wl@gnu.org)
Date: Mon Feb 04 2002 - 18:18:25 EST


Please comment. Send answers to linux-utf8@nl.linux.org also.

The main usage would be terminals like xterm.

    Werner


attached mail follows:


Werner LEMBERG wrote on 2002-02-04 15:23 UTC:
>
> > One potential alternative is that, given Unicode 3.2 has just
> > introduced the notion of variation selectors, we ask the
> > UTC and WG2 to consider the addition of two special variation
> > selectors for single-width and double-width selection of glyphs
> > in the East Asian ambiguous class. That would be most easy to
> > implement with existing font display engines that feature ligature
> > substitution. That would be a way of allowing applications or
> > encoding translation filters to have tight control over the
> > width of a character on a character cell terminal, without
> > the introduction of new ESC sequences. The a font could easily
> > contain both narrow (CP437) and wide (JIS) versions of the
> > U+25xx box drawing characters, etc.
>
> An excellent idea! Please send something to the Unicode list.

I'm not on unicode at the moment, but I have just written up
a few lines on the idea on

  http://www.cl.cam.ac.uk/~mgk25/ucs/scw-proposal.html#selector

Feel free to forward this there.

Markus

-- 
Markus G. Kuhn, Computer Laboratory, University of Cambridge, UK
Email: mkuhn at acm.org,  WWW: <http://www.cl.cam.ac.uk/~mgk25/>



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