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-rw-r--r--tex/context/base/tabl-tbl.lua36
1 files changed, 36 insertions, 0 deletions
diff --git a/tex/context/base/tabl-tbl.lua b/tex/context/base/tabl-tbl.lua
new file mode 100644
index 000000000..dbb3cfd37
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+++ b/tex/context/base/tabl-tbl.lua
@@ -0,0 +1,36 @@
+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 = string.gsub, string.rep, string.sub
+
+local P, C, Cc, Ct, lpegmatch = lpeg.P, lpeg.C, lpeg.Cc, lpeg.Ct, lpeg.match
+
+local settexcount = 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, "%*(%b{})(%b{})", function(n,p)
+ return rep(sub(p,2,-2),tonumber(sub(n,2,-2)) or 1)
+ end)
+ local t = lpegmatch(pattern,preamble)
+ local m = #t - 2
+ settexcount("global","noftabulatecolumns", m/2)
+ settexcount("global","tabulatehasfirstrulespec", t[1] == "" and 0 or 1)
+ settexcount("global","tabulatehaslastrulespec", t[m+1] == "" and 0 or 1)
+ for i=1,m,2 do
+ context.settabulateentry(t[i],t[i+1])
+ end
+ context.setlasttabulateentry(t[m+1])
+end