There's a problem with oldstyle glyphs, because they have different
codes inside a font.
I used fontforge to find the "four.oldstyle" glyph, whose code is 0xf734.
But then I discovered that the 'four.oldstyle' key works the same in the
lua table.
This is the updated MWE, suitable for oldstyle glyphs too.
--------------------------------------------------
\mainlanguage[it]
% modified from http://www.pragma-ade.com/context/latest/cont-tst.zip
% file: doc/context/tests/mkiv/fonts/extensions-001.tex
\startluacode
fonts.handlers.otf.addfeature {
name = "ktest",
type = "kern",
data = {
[ '’' ] = {
[ '4' ] = -100,
[ 0xf734 ] = -150, -- four.oldstyle code
-- [ 'four.oldstyle' ] = -150, -- this is the same as the
previous line
},
}
}
\stopluacode
\definefontfeature[ktest][ktest=yes]
\definefontfeature[onum][onum=yes]
\starttext
Default: «Questo è successo nel ’48».
Desired: «Questo è successo nel ’\kern-.1em 48».
Solved: \feature[+][ktest]«Questo è successo nel ’48».
Onum: \feature[+][onum]«Questo è successo nel ’48».
\stoptext
--------------------------------------------------
Massi
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