[NTG-context] oldstyle numerals in STIX Two Math

[Wolfgang Schuster]

Alan Bowen schrieb am 21.10.2020 um 20:46:
> Thanks, Hraban.That’s a helpful start
> 
>   I guess the challenge now is to get STIX Two Math to use the oldstyle 
> numerals in STIX Two Text (by adapting code that Wolgang gave me for 
> using  oldstyle numerals with TexGyre Math). When I ran
> 
> mtxrun --script fonts --list --info stixtwotext, I got
> 
> mtx-fonts       |   onum     cyrl     dflt
> 
> mtx-fonts       |            dflt     dflt
> 
> mtx-fonts       |            grek     dflt
> 
> mtx-fonts       |            latn     dflt rom trk
> 
> 
> Sadly, I have no idea what this means or how it might help in 
> identifying the Unicode range of the oldstyle numerals in STIX Two Text. 
> And that is something I need to take advantage of Wolfgang’s code.

You replace the normal digits but apply the oldstyle feature.

\definefontfamily
   [alan] [rm] [STIX Two Text]
   [features={default,f:oldstyle}]

\definefallbackfamily
   [alan] [mm] [STIX Two Text]
   [range=digitsnormal,force=yes,features=f:oldstyle]

\definefontfamily
   [alan] [mm] [STIX Two Math]

\setupbodyfont [alan]

\starttext

abc 123456789 xyz

\m{abc\ 123456789\ xyz}

\stoptext

Wolfgang