Re: combining chars issue

[Kenichi Handa <handa@m17n.org>]

Sorry for the late response on this matter.
In article <20080619143057.GA85105@orion.lan>, Emanuele Giaquinta <emanuele.giaquinta@gmail.com> writes:

> with latest cvs combining chars are not handled properly in emacs -Q -nw.
> It seems emacs does not write the combining chars at all on stdout, so
> they are not displayed.
> Attached is an utf-8 encoded file that should exhibit the problem and a
> typescript of emacs $file. As you can see from the typescript, emacs
> writes U+39b but not U+300. However, what-cursor-position reports U+300
> in the cell next to the U+39b one, so it seems only a display issue.

I've just installed a fix.

> The problem seems to be in term.c:append_glyph, which does not append
> any glyph when it->pixel_width == 0.
> Does the attached patch make sense?

No.  The sequence of base character and the following
combining characters must be composed to one grapheme
cluster to provide a reasonable cursor movement.  The
problem was that auto-composition-mode didn't handle the
case of terminal display.

---
Kenichi Handa
handa@ni.aist.go.jp