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if not modules then modules = { } end modules ['math-ext'] = {
version = 1.001,
comment = "companion to math-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local trace_virtual = false trackers.register("math.virtual", function(v) trace_virtual = v end)
mathematics = mathematics or { }
characters = characters or { }
local report_math = logs.new("mathematics")
mathematics.extras = mathematics.extras or { }
characters.math = characters.math or { }
local chardata = characters.data
local mathdata = characters.math
function mathematics.extras.add(unicode,t)
local min, max = mathematics.extrabase, mathematics.privatebase - 1
if unicode >= min and unicode <= max then
mathdata[unicode], chardata[unicode] = t, t
else
report_math("extra U+%04X should be in range U+%04X - U+%04X",unicode,min,max)
end
end
function mathematics.extras.copy(tfmdata)
local math_parameters = tfmdata.math_parameters
local MathConstants = tfmdata.MathConstants
if (math_parameters and next(math_parameters)) or (MathConstants and next(MathConstants)) then
local characters = tfmdata.characters
for unicode, extradesc in next, mathdata do
-- always, because in an intermediate step we can have a non math font
local extrachar = characters[unicode]
local nextinsize = extradesc.nextinsize
if nextinsize then
for i=1,#nextinsize do
local nextslot = nextinsize[i]
local nextbase = characters[nextslot]
if nextbase then
local nextnext = nextbase and nextbase.next
if nextnext then
local nextchar = characters[nextnext]
if nextchar then
if trace_virtual then
report_math("extra U+%04X in %s at %s maps on U+%04X (class: %s, name: %s)",unicode,file.basename(tfmdata.fullname),tfmdata.size,nextslot,extradesc.mathclass or "?",extradesc.mathname or "?")
end
characters[unicode] = nextchar
break
end
end
end
end
if not characters[unicode] then -- can be set in previous loop
for i=1,#nextinsize do
local nextslot = nextinsize[i]
local nextbase = characters[nextslot]
if nextbase then
characters[unicode] = nextbase -- still ok?
break
end
end
end
end
end
else
-- let's not waste time on non-math
end
end
table.insert(fonts.tfm.mathactions,mathematics.extras.copy)
-- 0xFE302 -- 0xFE320 for accents
mathematics.extras.add(0xFE302, {
category="mn",
description="WIDE MATHEMATICAL HAT",
direction="nsm",
linebreak="cm",
mathclass="accent",
mathname="widehat",
mathstretch="h",
unicodeslot=0xFE302,
nextinsize={ 0x00302, 0x0005E },
} )
mathematics.extras.add(0xFE303, {
category="mn",
cjkwd="a",
description="WIDE MATHEMATICAL TILDE",
direction="nsm",
linebreak="cm",
mathclass="accent",
mathname="widetilde",
mathstretch="h",
unicodeslot=0xFE303,
nextinsize={ 0x00303, 0x0007E },
} )
-- 0xFE321 -- 0xFE340 for missing characters
mathematics.extras.add(0xFE321, {
category="sm",
description="MATHEMATICAL SHORT BAR",
-- direction="on",
-- linebreak="nu",
mathclass="relation",
mathname="mapstochar",
unicodeslot=0xFE321,
} )
mathematics.extras.add(0xFE322, {
category="sm",
description="MATHEMATICAL LEFT HOOK",
mathclass="relation",
mathname="lhook",
unicodeslot=0xFE322,
} )
mathematics.extras.add(0xFE323, {
category="sm",
description="MATHEMATICAL RIGHT HOOK",
mathclass="relation",
mathname="rhook",
unicodeslot=0xFE323,
} )
mathematics.extras.add(0xFE324, {
category="sm",
description="MATHEMATICAL SHORT BAR MIRRORED",
-- direction="on",
-- linebreak="nu",
mathclass="relation",
mathname="mapsfromchar",
unicodeslot=0xFE324,
} )
--~ mathematics.extras.add(0xFE304, {
--~ category="sm",
--~ description="TOP AND BOTTOM PARENTHESES",
--~ direction="on",
--~ linebreak="al",
--~ mathclass="doubleaccent",
--~ mathname="doubleparent",
--~ unicodeslot=0xFE304,
--~ accents={ 0x023DC, 0x023DD },
--~ } )
--~ mathematics.extras.add(0xFE305, {
--~ category="sm",
--~ description="TOP AND BOTTOM BRACES",
--~ direction="on",
--~ linebreak="al",
--~ mathclass="doubleaccent",
--~ mathname="doublebrace",
--~ unicodeslot=0xFE305,
--~ accents={ 0x023DE, 0x023DF },
--~ } )
--~ \Umathchardef\braceld="0 "1 "FF07A
--~ \Umathchardef\bracerd="0 "1 "FF07B
--~ \Umathchardef\bracelu="0 "1 "FF07C
--~ \Umathchardef\braceru="0 "1 "FF07D
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