[lltx] fontspec push

[Will Robertson]

Hi,

Found some time to concentrate on fontspec for a little while this evening. (Khaled, I'm sorry to keep doing this to you, but does this work under LuaTeX yet? I'm still having issues with luaotfload and external fonts on Mac OS X. I've been working with the code that was breaking before, so I might have fixed things up accidentally-on-purpose.)

Added the following "programmer's interface" with, I suspect, more to come eventually. Does this all make sense? More importantly, does fontspec even compile documents for you still?


\documentclass{article}
\usepackage{fontspec}
\begin{document}

\ExplSyntaxOn

\fontspec{texgyrepagella-regular.otf}
\fontspec_if_script:nTF {cyrl} {True}{False}/
\fontspec_if_language:nTF {ROM} {True}{False?}/
\fontspec_if_language:nnTF {latn} {ROM} {True}{False?}/
\fontspec_if_feature:nTF {+pnum} {True} {False?}/
\fontspec_if_feature:nnnTF {latn} {ROM} {+pnum} {True} {False?}/

\par
Test~script:~
\fontspec[Script = Cyrillic]{texgyrepagella-regular.otf}
\fontspec_if_current_script:nTF {cyrl} {True}{False?}/
\fontspec_if_current_script:nTF {latn} {True?}{False}/

\par
Test~language:~
\fontspec[Language = Turkish]{texgyrepagella-regular.otf}
\fontspec_if_current_language:nTF {TRK} {True}{False?}/
\fontspec_if_current_language:nTF {ROM} {True?}{False}/

\end{document}


Oh, forgot to mention "\fontspec_if_fontspec_font:TF" and "\fontspec_if_opentype:TF" in there, which I suspect are probably way less useful.

-- Will