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if not modules then modules = { } end modules ['x-mathml'] = {
version = 1.001,
comment = "companion to x-mathml.tex",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
lxml.mml = lxml.mml or { }
local texsprint = tex.sprint
local format = string.format
local xmlsprint = xml.sprint
local xmlcprint = xml.cprint
-- an alternative is to remap to private codes, where we can have
-- different properties .. to be done; this will move and become
-- generic
local n_replacements = {
-- [" "] = utf.char(0x2002), -- "&textspace;" -> tricky, no &; in mkiv
["."] = "{.}",
[","] = "{,}",
[" "] = "",
}
local o_replacements = {
["@l"] = "\\mmlleftdelimiter.",
["@r"] = "\\mmlrightdelimiter.",
["{"] = "\\mmlleftdelimiter\\lbrace",
["}"] = "\\mmlrightdelimiter\\rbrace",
["("] = "\\mmlleftdelimiter(",
[")"] = "\\mmlrightdelimiter)",
["["] = "\\mmlleftdelimiter[",
["]"] = "\\mmlrightdelimiter]",
["<"] = "\\mmlleftdelimiter<",
[">"] = "\\mmlrightdelimiter>",
["#"] = "\\mmlchar{35}",
["$"] = "\\mmlchar{36}", -- $
["%"] = "\\mmlchar{37}",
["&"] = "\\mmlchar{38}",
["^"] = "\\mmlchar{94}{}", -- strange, sometimes luatex math sees the char instead of \char
["_"] = "\\mmlchar{95}{}", -- so we need the {}
["~"] = "\\mmlchar{126}",
[" "] = "",
}
local i_replacements = {
["sin"] = "\\mathopnolimits{sin}",
["cos"] = "\\mathopnolimits{cos}",
["abs"] = "\\mathopnolimits{abs}",
["arg"] = "\\mathopnolimits{arg}",
["codomain"] = "\\mathopnolimits{codomain}",
["curl"] = "\\mathopnolimits{curl}",
["determinant"] = "\\mathopnolimits{det}",
["divergence"] = "\\mathopnolimits{div}",
["domain"] = "\\mathopnolimits{domain}",
["gcd"] = "\\mathopnolimits{gcd}",
["grad"] = "\\mathopnolimits{grad}",
["identity"] = "\\mathopnolimits{id}",
["image"] = "\\mathopnolimits{image}",
["lcm"] = "\\mathopnolimits{lcm}",
["max"] = "\\mathopnolimits{max}",
["median"] = "\\mathopnolimits{median}",
["min"] = "\\mathopnolimits{min}",
["mode"] = "\\mathopnolimits{mode}",
["mod"] = "\\mathopnolimits{mod}",
["polar"] = "\\mathopnolimits{Polar}",
["exp"] = "\\mathopnolimits{exp}",
["ln"] = "\\mathopnolimits{ln}",
["log"] = "\\mathopnolimits{log}",
["sin"] = "\\mathopnolimits{sin}",
["arcsin"] = "\\mathopnolimits{arcsin}",
["sinh"] = "\\mathopnolimits{sinh}",
["arcsinh"] = "\\mathopnolimits{arcsinh}",
["cos"] = "\\mathopnolimits{cos}",
["arccos"] = "\\mathopnolimits{arccos}",
["cosh"] = "\\mathopnolimits{cosh}",
["arccosh"] = "\\mathopnolimits{arccosh}",
["tan"] = "\\mathopnolimits{tan}",
["arctan"] = "\\mathopnolimits{arctan}",
["tanh"] = "\\mathopnolimits{tanh}",
["arctanh"] = "\\mathopnolimits{arctanh}",
["cot"] = "\\mathopnolimits{cot}",
["arccot"] = "\\mathopnolimits{arccot}",
["coth"] = "\\mathopnolimits{coth}",
["arccoth"] = "\\mathopnolimits{arccoth}",
["csc"] = "\\mathopnolimits{csc}",
["arccsc"] = "\\mathopnolimits{arccsc}",
["csch"] = "\\mathopnolimits{csch}",
["arccsch"] = "\\mathopnolimits{arccsch}",
["sec"] = "\\mathopnolimits{sec}",
["arcsec"] = "\\mathopnolimits{arcsec}",
["sech"] = "\\mathopnolimits{sech}",
["arcsech"] = "\\mathopnolimits{arcsech}",
[" "] = "",
["false"] = "{\\mr false}",
["notanumber"] = "{\\mr NaN}",
["otherwise"] = "{\\mr otherwise}",
["true"] = "{\\mr true}",
["declare"] = "{\\mr declare}",
["as"] = "{\\mr as}",
}
function lxml.mml.checked_operator(str)
texsprint(tex.ctxcatcodes,(str:gsub(".",o_replacements)))
end
function lxml.mml.mn(id,pattern)
local str = xml.content(lxml.id(id),pattern) or ""
texsprint(tex.ctxcatcodes,(str:gsub(".",n_replacements)))
end
function lxml.mml.mo(id,pattern)
local str = xml.content(lxml.id(id),pattern) or ""
tex.sprint(tex.ctxcatcodes,(str:gsub(".",o_replacements)))
end
function lxml.mml.mi(id,pattern)
local str = xml.content(lxml.id(id),pattern) or ""
str = str:gsub("^%s*(.*)%s*$","%1")
local rep = i_replacements[str]
if rep then
tex.sprint(tex.ctxcatcodes,rep)
else
tex.sprint(tex.ctxcatcodes,(str:gsub(".",i_replacements)))
end
end
function lxml.mml.mfenced(id,pattern) -- multiple separators
id = lxml.id(id)
local left, right, separators = id.at.open or "(", id.at.close or ")", id.at.separators or ","
local l, r = left:find("[%(%{%<%[]"), right:find("[%)%}%>%]]")
texsprint(tex.ctxcatcodes,"\\enabledelimiter")
if l then
texsprint(tex.ctxcatcodes,o_replacements[left])
else
texsprint(tex.ctxcatcodes,o_replacements["@l"])
texsprint(tex.ctxcatcodes,left)
end
texsprint(tex.ctxcatcodes,"\\disabledelimiter")
local n = xml.count(id,pattern)
if n == 0 then
-- skip
elseif n == 1 then
lxml.all(id,pattern)
else
local t = { }
for s in utf.gmatch(separators,"([^%s])") do
t[#t+1] = s
end
for i=1,n do
lxml.idx(id,pattern,i) -- kind of slow, some day ...
if i < n then
local m = t[i] or t[#t] or ""
if m == "|" then
m = "\\enabledelimiter\\middle|\\relax\\disabledelimiter"
elseif m == "{" then
m = "\\{"
elseif m == "}" then
m = "\\}"
end
texsprint(tex.ctxcatcodes,m)
end
end
end
texsprint(tex.ctxcatcodes,"\\enabledelimiter")
if r then
texsprint(tex.ctxcatcodes,o_replacements[right])
else
texsprint(tex.ctxcatcodes,right)
texsprint(tex.ctxcatcodes,o_replacements["@r"])
end
texsprint(tex.ctxcatcodes,"\\disabledelimiter")
end
local function flush(e,tag,toggle)
-- texsprint(tex.ctxcatcodes,(toggle and "^{") or "_{")
if toggle then
texsprint(tex.ctxcatcodes,"^{")
else
texsprint(tex.ctxcatcodes,"_{")
end
if tag == "none" then
texsprint(tex.ctxcatcodes,"{}")
else
xmlsprint(e.dt)
end
if not toggle then
texsprint(tex.ctxcatcodes,"}")
else
texsprint(tex.ctxcatcodes,"}{}")
end
return not toggle
end
function lxml.mml.mmultiscripts(id)
local done, toggle = false, false
id = lxml.id(id)
-- for i=1,#id.dt do local e = id.dt[i] if type(e) == table then ...
for r, d, k in xml.elements(id,"/*") do
local e = d[k]
local tag = e.tg
if tag == "mprescripts" then
texsprint(tex.ctxcatcodes,"{}")
done = true
elseif done then
toggle = flush(e,tag,toggle)
end
end
local done, toggle = false, false
for r, d, k in xml.elements(id,"/*") do
local e = d[k]
local tag = e.tg
if tag == "mprescripts" then
break
elseif done then
toggle = flush(e,tag,toggle)
else
xmlsprint(e.dt)
done = true
end
end
end
local columnalignments = {
left = "flushleft",
right = "flushright",
center = "middle",
}
local rowalignments = {
top = "high",
bottom = "low",
center = "lohi",
baseline = "top",
axis = "lohi",
}
local frametypes = {
none = "off",
solid = "on",
dashed = "on",
}
function lxml.mml.mtable(root)
root = lxml.id(root)
-- todo: align, rowspacing, columnspacing, rowlines, columnlines
local at = root.at
local rowalign = at.rowalign
local columnalign = at.columnalign
local frame = at.frame
local rowaligns = rowalign and rowalign :split(" ") -- we have a faster one
local columnaligns = columnalign and columnalign:split(" ") -- we have a faster one
local frames = frame and frame :split(" ") -- we have a faster one
local framespacing = at.framespacing or ".5ex"
texsprint(tex.ctxcatcodes, format("\\bTABLE[frame=%s,offset=%s]",frametypes[frame or "none"] or "off",framespacing))
for r, d, k in xml.elements(root,"/(mml:mtr|mml:mlabeledtr)") do
texsprint(tex.ctxcatcodes,"\\bTR")
local dk = d[k]
local at = dk.at
local col = 0
local rfr = at.frame or (frames and frames [#frames])
local rra = at.rowalign or (rowaligns and rowaligns [#rowaligns])
local rca = at.columnalign or (columnaligns and columnaligns[#columnaligns])
for rr, dd, kk in xml.elements(dk,"/mml:mtd") do
col = col + 1
local dk = dd[kk]
local at = dk.at
local rowspan, columnspan = at.rowspan or 1, at.columnspan or 1
local cra = rowalignments [at.rowalign or (rowaligns and rowaligns [col]) or rra or "center"] or "lohi"
local cca = columnalignments[at.columnalign or (columnaligns and columnaligns[col]) or rca or "center"] or "middle"
local cfr = frametypes [at.frame or (frames and frames [col]) or rfr or "none" ] or "off"
texsprint(tex.ctxcatcodes,format("\\bTD[align={%s,%s},frame=%s,nx=%s,ny=%s]$\\ignorespaces",cra,cca,cfr,columnspan,rowspan))
xmlcprint(dk)
texsprint(tex.ctxcatcodes,"\\removeunwantedspaces$\\eTD") -- $
end
if dk.tg == "mlabeledtr" then
texsprint(tex.ctxcatcodes,"\\bTD")
xmlcprint(xml.first(dk,"/!mml:mtd"))
texsprint(tex.ctxcatcodes,"\\eTD")
end
texsprint(tex.ctxcatcodes,"\\eTR")
end
texsprint(tex.ctxcatcodes, "\\eTABLE")
end
function lxml.mml.csymbol(root)
root = lxml.id(root)
local encoding = root.at.encoding or ""
local hash = url.hashed((root.at.definitionUrl or ""):lower())
local full = hash.original or ""
local base = hash.path or ""
local text = string.strip(xml.content(root) or "")
texsprint(tex.ctxcatcodes,format("\\mmlapplycsymbol{%s}{%s}{%s}{%s}",full,base,encoding,text))
end
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