On 11/11/2022 10:19 PM, Leah Neukirchen via ntg-context wrote:
Hi,
as Hans recommended in the last video meeting, I tried to implement
the texquotes feature using OTF features, and hit two problems:
1) To support German quotes as well, I have two ligatures that end
up as the same glyph:
`` -> “
"' -> “
This can't be in the same ligature feature, as it will overwrite
the table entry with a duplicate key.
After some fiddling, I decided to map "' to a Unicode PUA symbol
and then add a second feature that maps this symbol to “ using
the substitute feature. This works for TeX Gyre Schola.
But perhaps someone knows a nicer way.
2) This approach doesn't work for lmodern or palatino, I still
get "' as inch-sign/quote there... anything else I need to tweak
for these fonts?
\startluacode
fonts.handlers.otf.addfeature {
name = "texlig",
type = "ligature",
data = {
['“'] = { "`", "`" },
['”'] = { "'", "'" },
['„'] = { '"', "`" },
[''] = { '"', "'" },
['‘'] = { "`" },
['’'] = { "'" }
}
}
fonts.handlers.otf.addfeature {
name = "texsub",
type = "substitute",
data = {
[''] = '“',
}
}
\stopluacode
% with lmodern or palatino it breaks
\setupbodyfont[schola]
\definefontfeature[ltest][texlig=yes,texsub=yes,trep=no]
\addff{ltest}
\starttext
``foo'' `foo' "`foo"' 19" rack
\stoptext
can you show what is wrong and what it should be with
fonts.handlers.otf.addfeature {
name = "germantexlig",
type = "ligature",
data = {
['“'] = { "`", "`" },
['”'] = { "'", "'" },
['„'] = { '"', "`" },
['“'] = { '"', "'" },
['‘'] = { "`" },
['’'] = { "'" }
}
}
best not use an existign feature because we accumulate ... features come
in order (you can force order if needed as you probably saw in one of
the test files)
\definefontfeature[ltest][germantexlig=yes,trep=no] \addff{ltest}
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tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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