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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 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 context = context
local commands = commands
local texsetcount = tex.setcount
local texiscount = tex.iscount
local separator = P("|") -- keep { }
----- nested = C(lpeg.patterns.nested) -- remove { }
local nested = lpeg.patterns.argument
local pattern = Ct((separator * (nested + Cc("")) * C((1-separator)^0))^0)
local ctx_settabulatelastentry = context.settabulatelastentry
local ctx_settabulateentry = context.settabulateentry
local c_tabl_tabulate_nofcolumns = texiscount("c_tabl_tabulate_nofcolumns")
local c_tabl_tabulate_has_rule_spec_first = texiscount("c_tabl_tabulate_has_rule_spec_first")
local c_tabl_tabulate_has_rule_spec_last = texiscount("c_tabl_tabulate_has_rule_spec_last")
-- the lmtx raw processor handles {} like the normal one so we need to prune
local function presettabulate(preamble)
preamble = gsub(preamble,"~","d") -- let's get rid of ~ mess here
if find(preamble,"*",1,true) 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
ctx_settabulateentry(t[i],t[i+1])
end
ctx_settabulatelastentry(t[m+1])
end
interfaces.implement {
name = "presettabulate",
actions = presettabulate,
arguments = "string",
scope = "private",
}
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