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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"
}
-- if needed we can use the info here to set up xetex definition files
-- the "8000 hackery influences direct characters (utf) as indirect \char's
local utf = unicode.utf8
local texsprint, format, utfchar, utfbyte = tex.sprint, string.format, utf.char, utf.byte
local trace_defining = false trackers.register("math.defining", function(v) trace_defining = v end)
mathematics = mathematics or { }
mathematics.extrabase = 0xFE000 -- here we push some virtuals
mathematics.privatebase = 0xFF000 -- here we push the ex
local families = {
tf = 0, it = 1, sl = 2, bf = 3, bi = 4, bs = 5, -- virtual fonts or unicode otf
}
local classes = {
ord = 0, -- mathordcomm mathord
op = 1, -- mathopcomm mathop
bin = 2, -- mathbincomm mathbin
rel = 3, -- mathrelcomm mathrel
open = 4, -- mathopencomm mathopen
close = 5, -- mathclosecomm mathclose
punct = 6, -- mathpunctcomm mathpunct
alpha = 7, -- mathalphacomm firstofoneargument
accent = 8, -- class 0
radical = 9,
xaccent = 10, -- class 3
topaccent = 11, -- class 0
botaccent = 12, -- class 0
under = 13,
over = 14,
delimiter = 15,
inner = 0, -- mathinnercomm mathinner
nothing = 0, -- mathnothingcomm firstofoneargument
choice = 0, -- mathchoicecomm @@mathchoicecomm
box = 0, -- mathboxcomm @@mathboxcomm
limop = 1, -- mathlimopcomm @@mathlimopcomm
nolop = 1, -- mathnolopcomm @@mathnolopcomm
}
mathematics.families = families
mathematics.classes = classes
classes.alphabetic = classes.alpha
classes.unknown = classes.nothing
classes.default = classes.nothing
classes.punctuation = classes.punct
classes.normal = classes.nothing
classes.opening = classes.open
classes.closing = classes.close
classes.binary = classes.bin
classes.relation = classes.rel
classes.fence = classes.unknown
classes.diacritic = classes.accent
classes.large = classes.op
classes.variable = classes.alphabetic
classes.number = classes.alphabetic
-- there will be proper functions soon (and we will move this code in-line)
-- no need for " in class and family (saves space)
local function delcode(target,family,slot)
return format('\\Udelcode%s="%X "%X ',target,family,slot)
end
local function mathchar(class,family,slot)
return format('\\Umathchar "%X "%X "%X ',class,family,slot)
end
local function mathaccent(class,family,slot)
return format('\\Umathaccent "%X "%X "%X ',0,family,slot) -- no class
end
local function delimiter(class,family,slot)
return format('\\Udelimiter "%X "%X "%X ',class,family,slot)
end
local function radical(family,slot)
return format('\\Uradical "%X "%X ',family,slot)
end
local function mathchardef(name,class,family,slot)
return format('\\Umathchardef\\%s "%X "%X "%X ',name,class,family,slot)
end
local function mathcode(target,class,family,slot)
return format('\\Umathcode%s="%X "%X "%X ',target,class,family,slot)
end
local function mathtopaccent(class,family,slot)
return format('\\Umathaccent "%X "%X "%X ',0,family,slot) -- no class
end
local function mathbotaccent(class,family,slot)
return format('\\Umathbotaccent "%X "%X "%X ',0,family,slot) -- no class
end
local function mathtopdelimiter(class,family,slot)
return format('\\Uoverdelimiter "%X "%X ',0,family,slot) -- no class
end
local function mathbotdelimiter(class,family,slot)
return format('\\Uunderdelimiter "%X "%X ',0,family,slot) -- no class
end
local escapes = characters.filters.utf.private.escapes
local function setmathsymbol(name,class,family,slot)
if class == classes.accent then
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,mathaccent(class,family,slot)))
elseif class == classes.topaccent then
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,mathtopaccent(class,family,slot)))
elseif class == classes.botaccent then
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,mathbotaccent(class,family,slot)))
elseif class == classes.over then
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,mathtopdelimiter(class,family,slot)))
elseif class == classes.under then
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,mathbotdelimiter(class,family,slot)))
elseif class == classes.open or class == classes.close then
texsprint(delcode(slot,family,slot))
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,delimiter(class,family,slot)))
elseif class == classes.delimiter then
texsprint(delcode(slot,family,slot))
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,delimiter(0,family,slot)))
elseif class == classes.radical then
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,radical(family,slot)))
else
-- beware, open/close and other specials should not end up here
--~ local ch = utfchar(slot)
--~ if escapes[ch] then
--~ texsprint(format("\\xdef\\%s{\\char%s }",name,slot))
--~ else
texsprint(format("\\unexpanded\\xdef\\%s{%s}",name,mathchar(class,family,slot)))
--~ end
end
end
local function setmathcharacter(class,family,slot,unicode,firsttime)
if not firsttime and class <= 7 then
texsprint(mathcode(slot,class,family,unicode or slot))
end
end
local function setmathsynonym(class,family,slot,unicode,firsttime)
if not firsttime and class <= 7 then
texsprint(mathcode(slot,class,family,unicode))
end
if class == classes.open or class == classes.close then
texsprint(delcode(slot,family,unicode))
end
end
local function report(class,family,unicode,name)
local nametype = type(name)
if nametype == "string" then
logs.report("mathematics","%s:%s %s U+%05X (%s) => %s",classname,class,family,unicode,utfchar(unicode),name)
elseif nametype == "number" then
logs.report("mathematics","%s:%s %s U+%05X (%s) => U+%05X",classname,class,family,unicode,utfchar(unicode),name)
else
logs.report("mathematics","%s:%s %s U+%05X (%s)", classname,class,family,unicode,utfchar(unicode))
end
end
-- there will be a combined \(math)chardef
function mathematics.define(slots,family)
family = family or 0
family = families[family] or family
local data = characters.data
for unicode, character in next, data do
local symbol = character.mathsymbol
if symbol then
local other = data[symbol]
local class = other.mathclass
if class then
class = classes[class] or class -- no real checks needed
if trace_defining then
report(class,family,unicode,symbol)
end
setmathsynonym(class,family,unicode,symbol)
end
local spec = other.mathspec
if spec then
for i, m in next, spec do
local class = m.class
if class then
class = classes[class] or class -- no real checks needed
setmathsynonym(class,family,unicode,symbol,i)
end
end
end
end
local mathclass = character.mathclass
local mathspec = character.mathspec
if mathspec then
for i, m in next, mathspec do
local name = m.name
local class = m.class
if not class then
class = mathclass
elseif not mathclass then
mathclass = class
end
if class then
class = classes[class] or class -- no real checks needed
if name then
if trace_defining then
report(class,family,unicode,name)
end
setmathsymbol(name,class,family,unicode)
-- setmathcharacter(class,family,unicode,unicode,i)
else
name = class == classes.variable or class == classes.number and character.adobename
if name then
if trace_defining then
report(class,family,unicode,name)
end
-- setmathcharacter(class,family,unicode,unicode,i)
end
end
setmathcharacter(class,family,unicode,unicode,i)
end
end
end
if mathclass then
local name = character.mathname
local class = classes[mathclass] or mathclass -- no real checks needed
if name == false then
if trace_defining then
report(class,family,unicode,name)
end
setmathcharacter(class,family,unicode)
else
name = name or character.contextname
if name then
if trace_defining then
report(class,family,unicode,name)
end
setmathsymbol(name,class,family,unicode)
else
if trace_defining then
report(class,family,unicode,character.adobename)
end
end
setmathcharacter(class,family,unicode,unicode)
end
end
end
end
-- needed for mathml analysis
function mathematics.utfmathclass(chr, default)
local cd = characters.data[utfbyte(chr)]
return (cd and cd.mathclass) or default or "unknown"
end
function mathematics.utfmathstretch(chr, default) -- "h", "v", "b", ""
local cd = characters.data[utfbyte(chr)]
return (cd and cd.mathstretch) or default or ""
end
function mathematics.utfmathcommand(chr, default)
local cd = characters.data[utfbyte(chr)]
local cmd = cd and cd.mathname
tex.sprint(cmd or default or "")
end
function mathematics.utfmathfiller(chr, default)
local cd = characters.data[utfbyte(chr)]
local cmd = cd and (cd.mathfiller or cd.mathname)
tex.sprint(cmd or default or "")
end
mathematics.entities = mathematics.entities or { }
function mathematics.register_xml_entities()
local entities = xml.entities
for name, unicode in pairs(mathematics.entities) do
if not entities[name] then
entities[name] = utfchar(unicode)
end
end
end
-- helpers
function mathematics.big(tfmdata,unicode,n)
local t = tfmdata.characters
local c = t[unicode]
if c then
local next = c.next
while next do
if n <= 1 then
return next
else
n = n - 1
next = t[next].next
end
end
end
return unicode
end
-- plugins
function mathematics.scaleparameters(t,tfmtable,delta)
local math_parameters = tfmtable.math_parameters
if math_parameters and next(math_parameters) then
delta = delta or 1
local _, mp = mathematics.dimensions(math_parameters)
for name, value in next, mp do
if name ~= "RadicalDegreeBottomRaisePercent" then
mp[name] = delta*value
else
mp[name] = value
end
end
t.MathConstants = mp
end
end
table.insert(fonts.tfm.mathactions,mathematics.scaleparameters)
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