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if not modules then modules = { } end modules ['tabl-tbl'] = {
version = 1.001,
comment = "companion to tabl-tbl.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- A couple of hacks ... easier to do in Lua than in regular TeX. More will
-- follow.
local context, commands = context, commands
local tonumber = tonumber
local gsub, rep, sub, find = string.gsub, string.rep, string.sub, string.find
local P, C, Cc, Ct, lpegmatch = lpeg.P, lpeg.C, lpeg.Cc, lpeg.Ct, lpeg.match
local texsetcount = tex.setcount
local separator = P("|")
local nested = lpeg.patterns.nested
local pattern = Ct((separator * (C(nested) + Cc("")) * C((1-separator)^0))^0)
function commands.presettabulate(preamble)
preamble = gsub(preamble,"~","d") -- let's get rid of ~ mess here
if find(preamble,"%*") then
-- todo: lpeg but not now
preamble = gsub(preamble, "%*(%b{})(%b{})", function(n,p)
return rep(sub(p,2,-2),tonumber(sub(n,2,-2)) or 1)
end)
end
local t = lpegmatch(pattern,preamble)
local m = #t - 2
texsetcount("global","c_tabl_tabulate_nofcolumns", m/2)
texsetcount("global","c_tabl_tabulate_has_rule_spec_first", t[1] == "" and 0 or 1)
texsetcount("global","c_tabl_tabulate_has_rule_spec_last", t[m+1] == "" and 0 or 1)
for i=1,m,2 do
context.settabulateentry(t[i],t[i+1])
end
context.settabulatelastentry(t[m+1])
end
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