# [XeTeX] local forms

Jonathan Kew jonathan_kew at sil.org
Fri Sep 22 15:49:36 CEST 2006

On 22 Sep 2006, at 2:37 pm, Pablo Rodríguez wrote:
>
> In order to get its legacy encoding when working with Greek, babel
> two commands \greektext and \latintext (which I have to empty in order
> to use them with XeTeX).
>
> I guess all it should be done is redefining these commands so that
> they
> will be able to switch scripts. Is it possible to switch the script
> without having to select a font?

There's no built-in way to do this at the "primitive" xetex level;
the OpenType shaping behavior is dependent on the script and language
settings which are part of the \font specification. So you'd be
dealing with two unrelated \font identifiers, which happen to load
the same font but with different "script=xxxx" settings.

Within LaTeX, you could probably do this with fontspec's
\addfontfeature, though this will be less efficient than predefining
separate font instances if you have a lot of switching back and forth
(as it has to rebuild the complete font description each time). So
something like this might work (untested):