Re: Ligature support

[Eli Zaretskii]

> Date: Fri, 05 Nov 2021 20:16:08 +0000 (UTC)
> Cc: eliz@gnu.org, emacs-devel@gnu.org
> From: Werner LEMBERG <wl@gnu.org>
> 
> 
> > If you press me, I think I can find two German homographs where the
> > one would take a ligature and the other not >:-)
> 
> Indeed.  Regarding an 'st' ligature (which is mandatory for Fraktur,
> by the way), there are some examples.
> 
>   Schiffstau:
>     Schiffs-tau (ship rope) vs. Schiff-stau (ship traffic jam)
> 
>   Wachstube:
>     Wachs-tube (wax tube) vs. Wach-stube (guard room)

You guys are splitting hair when we don't even have a reliable means
to tell HarfBuzz the ligature is required for German and not, say, for
English.  Currently, composition-function-table is _global_, i.e. it
affects all the buffers in the session.  We have a lot of turf to
cover before the above fine-tuning will be relevant.

Volunteers and patches are most welcome.