Am 12.12.2010 um 16:22 schrieb Marco:
> On 2010-12-12 Wolfgang Schuster <schuster.wolfg...@googlemail.com> wrote:
>
>>> Depending on your answers, I would perhaps request to trigger
>>> \setff{smallcaps} by \sc in the core.
>>
>> Can be a problem because we have font (e.g. Latin Modern) where
>> smallcaps are still in a separate file.
> So the user has to know in which fashion the small caps were created, as font
> feature or in a seperate file. That's not very convenient. When the user
> switches to another font it may break the document, since he has to change the
> \setff{smallcaps} to \sc.
>
> Maybe it is possible that the \sc macro can check if the font contains the
> small caps as a feature. Is there a switch like
> \doiffontfeatureexists{smcp}{...}? I have the following logic in mind:
>
> 1) Check if small caps are a font feature, if not
> 2) check if small caps are in a seperate font, if not
> 3) fake them.
\startluacode
function commands.doifelsecurrentfonthasfeature(name)
local f = fonts.identifiers[font.current()]
f = f and f.shared
f = f and f.otfdata
f = f and f.luatex
f = f and f.features
commands.doifelse(f and (f.gpos[name] or f.gsub[name]))
end
\stopluacode
\def\doifelsecurrentfonthasfeature#1%
{\ctxlua{commands.doifelsecurrentfonthasfeature("#1")}}
\let\normalsc\sc
\definefontfeature[smcp][smcp=yes]
\definefontfeature[latn][script=latn]
\unexpanded\def\sc{\doifelsecurrentfonthasfeature{smcp}{\addfs{smcp}}\normalsc}
\starttext
\tf text \sc text
\switchtobodyfont[cambria]\addfs{latn} % cambria needs the latin script for
smallcaps
\tf text \addfs{smcp} text
\switchtobodyfont[modern]
\tf text \sc text
\stoptext
Wolfgang
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