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%D \module
%D [ file=x-cals,
%D version=2007.09.05,
%D title=\CONTEXT\ XML Modules,
%D subtitle=Cals table renderer,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt XML Macros / Cals Tables}
\startluacode
do
lxml.cals = { }
lxml.cals.ignore_widths = false
-- the following flags only apply to columns that have a specified width
--
-- proportional : shrink or stretch proportionally to the width
-- equal : shrink or stretch equaly distributed
-- n < 1 : shrink or stretch proportionally to the width but multiplied by n
--
-- more clever things, e.g. the same but applied to unspecified widths
-- has to happen at the core-ntb level (todo)
lxml.cals.shrink_widths = false
lxml.cals.stretch_widths = false
local format = string.format
local texsprint = tex.sprint
local xmlsprint = xml.sprint
local xmlcprint = xml.cprint
local halignments = {
left = "flushleft",
right = "flushright",
center = "middle",
centre = "middle",
justify = "normal",
}
local valignments = {
top = "high",
bottom = "low",
middle = "lohi",
}
local function getspecs(root, pattern, names, widths)
-- here, but actually we need this in core-ntb.tex
-- but ideally we need an mkiv enhanced core-ntb.tex
local ignore_widths = lxml.cals.ignore_widths
local shrink_widths = lxml.cals.shrink_widths
local stretch_widths = lxml.cals.stretch_widths
for r, d, k in xml.elements(root,pattern) do
local dk = d[k]
local at = dk.at
local column = at.colnum
if column then
if not ignore_widths then
local width = at.colwidth
if width then
widths[tonumber(column)] = width:lower()
end
end
local name = at.colname
if name then
names[name] = tonumber(column)
end
end
end
local function adapt(b,w,delta,sum,n,what)
if b == "equal" then
delta = delta/n
for k, v in pairs(w) do
widths[k] = number.todimen(v - delta)
end
elseif b == "proportional" then
delta = delta/sum
for k, v in pairs(w) do
widths[k] = number.todimen(v - v*delta)
end
elseif type(b) == "number" and b < 1 then
delta = b*delta/sum
for k, v in pairs(w) do
widths[k] = number.todimen(v - v*delta)
end
end
end
if ignore_width then
-- forget about it
elseif shrink_widths or stretch_widths then
local sum, n, w = 0, 0, { }
for _, v in pairs(widths) do
n = n + 1
v = (type(v) == "string" and v:todimen()) or v
if v then
w[n] = v
sum = sum + v
end
end
local hsize = tex.hsize
if type(hsize) == "string" then
hsize = hsize:todimen()
end
local delta = sum - hsize
if shrink_widths and delta > 0 then
adapt(shrink_widths,w,delta,sum,n,"shrink")
elseif stretch_widths and delta < 0 then
adapt(stretch_widths,w,delta,sum,n,"stretch")
end
end
end
local function getspans(root, pattern, names, spans)
for r, d, k in xml.elements(root,pattern) do
local dk = d[k]
local at = dk.at
local name, namest, nameend = at.colname, names[at.namest or "?"], names[at.nameend or "?"]
if name and namest and nameend then
spans[name] = tonumber(nameend) - tonumber(namest) + 1
end
end
end
--local function texsprint(a,b) print(b) end
--local function xmlsprint(a) print(a) end
function lxml.cals.table(root,namespace)
local prefix = (namespace or "cals") .. ":"
local p = "/" .. prefix
local tgroupspec = p .. "tgroup"
local colspec = p .. "colspec"
local spanspec = p .. "spanspec"
local hcolspec = p .. "thead" .. p .. "colspec"
local bcolspec = p .. "tbody" .. p .. "colspec"
local fcolspec = p .. "tfoot" .. p .. "colspec"
local entryspec = p .. "entry" .. "|" ..prefix .. "entrytbl"
local hrowspec = p .. "thead" .. p .. "row"
local browspec = p .. "tbody" .. p .. "row"
local frowspec = p .. "tfoot" .. p .. "row"
local function tablepart(root, xcolspec, xrowspec, before, after)
texsprint(tex.ctxcatcodes,before)
local at = root.at
local pphalign, ppvalign = at.align, at.valign
local names, widths, spans = { }, { }, { }
getspecs(root, colspec , names, widths)
getspecs(root, xcolspec, names, widths)
getspans(root, spanspec, names, spans)
for r, d, k in xml.elements(root,xrowspec) do
texsprint(tex.ctxcatcodes,"\\bTR")
local dk = d[k]
local at = dk.at
local phalign, pvalign = at.align or pphalign, at.valign or ppvalign -- todo: __p__ test
local col = 1
for rr, dd, kk in xml.elements(dk,entryspec) do
local dk = dd[kk]
if dk.tg == "entrytbl" then
texsprint(tex.ctxcatcodes,"\\bTD{")
lxml.cals.table(dk)
texsprint(tex.ctxcatcodes,"}\\eTD")
col = col + 1
else
local at = dk.at
local b, e, s, m = names[at.namest or "?"], names[at.nameend or "?"], spans[at.spanname or "?"], at.morerows
local halign, valign = at.align or phalign, at.valign or pvalign
if b and e then
s = e - b + 1
end
if halign then
halign = halignments[halign]
end
if valign then
valign = valignments[valign]
end
local width = widths[col]
if s or m or halign or valign or width then -- only english interface !
texsprint(tex.ctxcatcodes,format("\\bTD[nx=%s,ny=%s,align={%s,%s},width=%s]",
s or 1, (m or 0)+1, halign or "flushleft", valign or "high", width or "fit"))
else
texsprint(tex.ctxcatcodes,"\\bTD[align={flushleft,high},width=fit]") -- else problems with vertical material
end
-- xmlsprint(dk)
xmlcprint(dk)
texsprint(tex.ctxcatcodes,"\\eTD")
col = col + (s or 1)
end
end
texsprint(tex.ctxcatcodes,"\\eTR")
end
texsprint(tex.ctxcatcodes,after)
end
for r, d, k in xml.elements(lxml.id(root),tgroupspec) do
local tgroup = d[k]
texsprint(tex.ctxcatcodes, "\\directsetup{cals:table:before}")
lxml.directives.before(root,"cdx") -- "cals:table"
texsprint(tex.ctxcatcodes, "\\bgroup")
lxml.directives.setup(root,"cdx") -- "cals:table"
texsprint(tex.ctxcatcodes, "\\bTABLE")
tablepart(tgroup, hcolspec, hrowspec, "\\bTABLEhead", "\\eTABLEhead")
tablepart(tgroup, bcolspec, browspec, "\\bTABLEbody", "\\eTABLEbody")
tablepart(tgroup, fcolspec, frowspec, "\\bTABLEfoot", "\\eTABLEfoot")
texsprint(tex.ctxcatcodes, "\\eTABLE")
texsprint(tex.ctxcatcodes, "\\egroup")
lxml.directives.after(root,"cdx") -- "cals:table"
texsprint(tex.ctxcatcodes, "\\directsetup{cals:table:after}")
end
end
end
\stopluacode
% \startxmlsetups xml:cals:process
% \xmlsetsetup {\xmldocument} {cals:table} {*}
% \stopxmlsetups
% \startxmlsetups cals:table
% \ctxlua{lxml.cals.table("#1")}
% \stopxmlsetups
% \xmlregistersetup{xml:cals:process}
\startxmlsetups xml:cals:process
\xmlsetfunction {\xmldocument} {cals:table} {lxml.cals.table}
\stopxmlsetups
\xmlregistersetup{xml:cals:process}
\xmlregisterns{cals}{cals}
\endinput
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