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if not modules then modules = { } end modules ['meta-ini'] = {
version = 1.001,
comment = "companion to meta-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local tonumber = tonumber
local format = string.format
local lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns
local P, Cs, R, S, C, Cc = lpeg.P, lpeg.Cs, lpeg.R, lpeg.S, lpeg.C, lpeg.Cc
local context = context
metapost = metapost or { }
-- for the moment downward compatible
local report_metapost = logs.reporter ("metapost")
local status_metapost = logs.messenger("metapost")
local patterns = { "meta-imp-%s.mkiv", "meta-imp-%s.tex", "meta-%s.mkiv", "meta-%s.tex" } -- we are compatible
local function action(name,foundname)
status_metapost("library %a is loaded",name)
context.startreadingfile()
context.input(foundname)
context.stopreadingfile()
end
local function failure(name)
report_metapost("library %a is unknown or invalid",name)
end
function commands.useMPlibrary(name)
commands.uselibrary {
name = name,
patterns = patterns,
action = action,
failure = failure,
onlyonce = true,
}
end
-- experimental
local colorhash = attributes.list[attributes.private('color')]
local textype = tex.type
local MPcolor = context.MPcolor
-- local validdimen = lpegpatterns.validdimen * P(-1)
--
-- function commands.prepareMPvariable(v) -- slow but ok
-- if v == "" then
-- MPcolor("black")
-- else
-- local typ, var = match(v,"(.):(.*)")
-- if not typ then
-- -- parse
-- if colorhash[v] then
-- MPcolor(v)
-- elseif tonumber(v) then
-- context(v)
-- elseif lpegmatch(validdimen,v) then
-- return context("\\the\\dimexpr %s",v)
-- else
-- for s in gmatch(v,"\\([a-zA-Z]+)") do -- can have trailing space
-- local t = textype(s)
-- if t == "dimen" then
-- return context("\\the\\dimexpr %s",v)
-- elseif t == "count" then
-- return context("\\the\\numexpr %s",v)
-- end
-- end
-- context("\\number %s",v) -- 0.4 ...
-- end
-- elseif typ == "d" then -- to be documented
-- -- dimension
-- context("\\the\\dimexpr %s",var)
-- elseif typ == "n" then -- to be documented
-- -- number
-- context("\\the\\numexpr %s",var)
-- elseif typ == "s" then -- to be documented
-- -- string
-- context(var)
-- elseif typ == "c" then -- to be documented
-- -- color
-- MPcolor(var)
-- else
-- context(var)
-- end
-- end
-- end
-- we can actually get the dimen/count values here
local dimenorname =
lpegpatterns.validdimen / function(s)
context("\\the\\dimexpr %s",s)
end
+ (C(lpegpatterns.float) + Cc(1)) * lpegpatterns.space^0 * P("\\") * C(lpegpatterns.letter^1) / function(f,s)
local t = textype(s)
if t == "dimen" then
context("\\the\\dimexpr %s\\%s",f,s)
elseif t == "count" then
context("\\the\\numexpr \\%s * %s\\relax",s,f) -- <n>\scratchcounter is not permitted
end
end
local splitter = lpeg.splitat(":",true)
function commands.prepareMPvariable(v) -- slow but ok
if v == "" then
MPcolor("black")
else
local typ, var = lpegmatch(splitter,v)
if not var then
-- parse
if colorhash[v] then
MPcolor(v)
elseif tonumber(v) then
context(v)
elseif not lpegmatch(dimenorname,v) then
context("\\number %s",v) -- 0.4 ...
end
elseif typ == "d" then -- to be documented
-- dimension
context("\\the\\dimexpr %s",var)
elseif typ == "n" then -- to be documented
-- number
context("\\the\\numexpr %s",var)
elseif typ == "s" then -- to be documented
-- string
context(var)
elseif typ == "c" then -- to be documented
-- color
MPcolor(var)
else
context(var)
end
end
end
-- function metapost.formatnumber(f,n) -- just lua format
-- f = gsub(f,"@(%d)","%%.%1")
-- f = gsub(f,"@","%%")
-- f = format(f,tonumber(n) or 0)
-- f = gsub(f,"e([%+%-%d]+)",function(s)
-- return format("\\times10^{%s}",tonumber(s) or s) -- strips leading zeros
-- end)
-- context.mathematics(f)
-- end
-- formatters["\\times10^{%N}"](s) -- strips leading zeros too
local one = Cs((P("@")/"%%." * (R("09")^1) + P("@")/"%%" + 1)^0)
local two = Cs((P("e")/"" * ((S("+-")^0 * R("09")^1) / function(s) return format("\\times10^{%s}",tonumber(s) or s) end) + 1)^1)
-- local two = Cs((P("e")/"" * ((S("+-")^0 * R("09")^1) / formatters["\\times10^{%N}"]) + 1)^1)
function metapost.formatnumber(fmt,n) -- just lua format
context.mathematics(lpegmatch(two,format(lpegmatch(one,fmt),n)))
end
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