TeX-like H&J demo

[Damon Chaplin <damon karuna uklinux net>]

Hi,

I've put a demo of my TeX-like hyphenation & justification code up at:

   http://www.gtk.org/~damon/pangoxt-0.1.0.tar.gz

You need to apply a small patch to Pango (1.2.1) to try it out. See the
README.

I don't think it will be ready for Pango 1.4 as there's still a lot to
do, but it might be nice to get a few changes to GLib & PangoLayout in
so we can plug-in external layout code, as the demo does.

Stuff needed for usable H & J:
 o Finish hyphenation - support ligatures, convert existing pattern
   files to UTF-8, support exceptions.
 o Character/cluster spacing.
 o Support kashidas.
 o Handle ligatures when breaking lines.
 o Handle soft hyphen characters (hide them if we don't break).
 o Strip kerning off characters at breaks.
 o Fix cursor positioning. There are problems around hyphens.
 o Support tabs.
 o Optimize memory use.

That doesn't include all the other stuff like kerning & tracking I want
to do as well.

Anyway, comments welcome.

Damon