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|
\startluacode
fonts.handlers.otf.addfeature {
name = "singlesubstitution",
type = "substitution",
data = {
a = "X",
b = "P",
}
}
\stopluacode
\startluacode
fonts.handlers.otf.addfeature {
name = "alternatesubstitution",
type = "alternate",
data = {
a = { "X", "Y" },
b = { "P", "Q" },
}
}
\stopluacode
\startluacode
fonts.handlers.otf.addfeature {
name = "multiplesubstitution",
type = "multiple",
data = {
a = { "X", "Y" },
b = { "P", "Q" },
}
}
\stopluacode
\startluacode
fonts.handlers.otf.addfeature {
name = "ligaturesubstitution",
type = "ligature",
data = {
['1'] = { "a", "b" },
['2'] = { "d", "a" },
}
}
\stopluacode
\startluacode
fonts.handlers.otf.addfeature {
name = "chainsubstitution-1",
type = "chainsubstitution",
-- flags = { false, false, false, false },
lookups = {
{
type = "substitution",
data = {
["b"] = "B",
["c"] = "C",
},
},
},
-- steps = {
-- {
-- rules = {
-- {
-- before = { { "a" } },
-- current = { { "b", "c" } },
-- lookups = { 1 },
-- },
-- },
-- },
-- },
data = {
rules = {
{
before = { { "a" } },
current = { { "b", "c" } },
lookups = { 1 },
},
},
},
}
\stopluacode
\startluacode
fonts.handlers.otf.addfeature {
name = "chainsubstitution-2",
type = "chainsubstitution",
prepend = 1,
lookups = {
{
type = "multiple",
data = {
["f"] = { "f", 0x200C },
},
},
{
type = "substitution",
data = {
["a"] = "1",
["b"] = "2",
["c"] = "3",
},
},
},
data = {
rules = {
{
current = { { "f" }, { "f" } },
lookups = { 1 },
},
{
current = { { "a" }, { "b" }, { "c" } },
lookups = { 2, false, 2 },
},
},
}
}
\stopluacode
\definefontfeature[singlesubstitution] [singlesubstitution=yes]
\definefontfeature[alternatesubstitution][alternatesubstitution=2]
\definefontfeature[multiplesubstitution] [multiplesubstitution=yes]
\definefontfeature[ligaturesubstitution] [ligaturesubstitution=yes]
\definefontfeature[chainsubstitution-1] [chainsubstitution-1=yes]
\definefontfeature[chainsubstitution-2] [chainsubstitution-2=yes]
\setupbodyfont[dejavu]
\starttext
\definedfont[Serif*default] \showfontkerns \showfontitalics \showglyphs
\startTEXpage
abracadabra\par
{\addff {singlesubstitution}abracadabra\par}
{\addff{alternatesubstitution}abracadabra\par}
{\addff {multiplesubstitution}abracadabra\par}
{\addff {ligaturesubstitution}abracadabra\par}
{\addff {chainsubstitution-1}abracadabra\par}
{\addff {chainsubstitution-2}effe abcdef !f\par}
\stopTEXpage
\stoptext
|
