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if not modules then modules = { } end modules ['meta-tex'] = {
version = 1.001,
comment = "companion to meta-tex.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local tostring = tostring
local format, gsub, find, match = string.format, string.gsub, string.find, string.match
local formatters = string.formatters
local P, S, R, C, Cs, lpegmatch = lpeg.P, lpeg.S, lpeg.R, lpeg.C, lpeg.Cs, lpeg.match
metapost = metapost or { }
local implement = interfaces.implement
-- local left = P("[")
-- local right = P("]")
-- local space = P(" ")
-- local argument = left * C((1-right)^1) * right
-- local pattern = (argument + space)^0
-- function metapost.sometxt(optional,str)
-- if optional == "" then
-- context.sometxta(str)
-- else
-- local one, two = lpegmatch(pattern,optional)
-- if two then
-- context.sometxtc(one,two,str)
-- elseif one then
-- context.sometxtb(one,str)
-- else
-- context.sometxta(str)
-- end
-- end
-- end
local pattern = Cs((P([[\"]]) + P([["]])/"\\quotedbl{}" + P(1))^0) -- or \char
function metapost.escaped(str)
context(lpegmatch(pattern,str))
end
implement {
name = "metapostescaped",
actions = metapost.escaped,
arguments = "string"
}
local simplify = true
-- local function strip(n,e)
-- -- get rid of e(0)
-- -- get rid of e(+*)
-- e = gsub(e,"^+","")
-- -- remove leading zeros
-- e = gsub(e,"^([+-]*)0+(%d)","%1%2")
-- if not simplify then
-- -- take it as it is
-- elseif n == "1" then
-- return format("10^{%s}",e)
-- end
-- return format("%s\\times10^{%s}",n,e)
-- end
--
-- function metapost.format_n(fmt,...)
-- fmt = gsub(fmt,"@","%%")
-- local initial, hasformat, final = match(fmt,"^(.-)(%%.-[%a])(.-)$")
-- if hasformat then
-- str = format(fmt,...)
-- str = gsub(str,"(.-)e(.-)$",strip)
-- str = format("%s\\mathematics{%s}%s",initial,str,final)
-- elseif not find(fmt,"%%") then
-- str = format("%"..fmt,...)
-- str = gsub(str,"(.-)e(.-)$",strip)
-- str = format("\\mathematics{%s}",str)
-- end
-- context(str)
-- end
-- todo: proper lpeg
-- local function strip(n,e)
-- -- get rid of e(0)
-- -- get rid of e(+*)
-- e = gsub(e,"^+","")
-- -- remove leading zeros
-- e = gsub(e,"^([+-]*)0+(%d)","%1%2")
-- if not simplify then
-- -- take it as it is
-- elseif n == "1" then
-- return format("\\mathematics{10^{%s}}",e)
-- end
-- return format("\\mathematics{%s\\times10^{%s}}",n,e)
-- end
--
-- function metapost.format_n(fmt,...)
-- fmt = gsub(fmt,"@","%%")
-- if find(fmt,"%%") then
-- str = format(fmt,...)
-- else -- yes or no
-- str = format("%"..fmt,...)
-- end
-- str = gsub(str,"([%-%+]-[%.%d]+)e([%-%+]-[%.%d]+)",strip)
-- context(str)
-- end
--
-- function metapost.format_v(fmt,str)
-- metapost.format_n(fmt,metapost.untagvariable(str,false))
-- end
-- -- --
local number = C((S("+-")^0 * R("09","..")^1))
local enumber = number * S("eE") * number
local cleaner = Cs((P("@@")/"@" + P("@")/"%%" + P(1))^0)
context = context or { exponent = function(...) print(...) end }
function metapost.format_string(fmt,...)
context(lpegmatch(cleaner,fmt),...)
end
function metapost.format_number(fmt,num)
local number = tonumber(num)
if number then
local base, exponent = lpegmatch(enumber,formatters[lpegmatch(cleaner,fmt)](number))
if base and exponent then
context.MPexponent(base,exponent)
else
context(number)
end
else
context(tostring(num))
end
end
-- This is experimental and will change!
function metapost.svformat(fmt,str)
metapost.format_string(fmt,metapost.untagvariable(str,false))
end
function metapost.nvformat(fmt,str)
metapost.format_number(fmt,metapost.untagvariable(str,false))
end
implement { name = "metapostformatted", actions = metapost.svformat, arguments = { "string", "string" } }
implement { name = "metapostgraphformat", actions = metapost.nvformat, arguments = { "string", "string" } }
-- local function test(fmt,n)
-- logs.report("mp format test","fmt: %s, n: %s, result: %s, \\exponent{%s}{%s}",fmt,n,
-- formatters[lpegmatch(cleaner,fmt)](n),
-- lpegmatch(enumber,formatters[lpegmatch(cleaner,fmt)](n))
-- )
-- end
--
-- test("@j","1e-8")
-- test("@j",1e-8)
-- test("@j","1e+8")
-- test("@j","1e-10")
-- test("@j",1e-10)
-- test("@j","1e+10")
-- test("@j","1e-12")
-- test("@j","1e+12")
-- test("@j","1e-0")
-- test("@j","1e+0")
-- test("@j","1")
-- test("@j test","1")
-- test("@j","-1")
-- test("@j","1e-102")
-- test("@1.4j","1e+102")
-- test("@j","1.2e+102")
-- test("@j","1.23e+102")
-- test("@j","1.234e+102")
local f_textext = formatters[ [[textext("%s")]] ]
local f_mthtext = formatters[ [[textext("\mathematics{%s}")]] ]
local f_exptext = formatters[ [[textext("\mathematics{%s\times10^{%s}}")]] ]
local mpprint = mp.print
function mp.format(fmt,str)
fmt = lpegmatch(cleaner,fmt)
mpprint(f_textext(formatters[fmt](metapost.untagvariable(str,false))))
end
function mp.formatted(fmt,num) -- svformat
fmt = lpegmatch(cleaner,fmt)
mpprint(f_textext(formatters[fmt](tonumber(num) or num)))
end
function mp.graphformat(fmt,num) -- nvformat
fmt = lpegmatch(cleaner,fmt)
local number = tonumber(num)
if number then
local base, exponent = lpegmatch(enumber,number)
if base and exponent then
mpprint(f_exptext(base,exponent))
else
mpprint(f_mthtext(num))
end
else
mpprint(f_textext(tostring(num)))
end
end
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