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if not modules then modules = { } end modules ['layo-ini'] = {
version = 1.001,
comment = "companion to layo-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- We need to share information between the TeX and Lua end about the typographical
-- model. This happens here. This code might move.
local texgetcount = tex.getcount
local conditionals = tex.conditionals
local c_realpageno = tex.iscount("realpageno")
local c_pagenoshift = tex.iscount("pagenoshift")
layouts = {
status = { },
}
local status = layouts.status
function status.leftorrightpageaction(left,right)
if left == nil then
left, right = false, true
end
if not conditionals.layoutisdoublesided then
return left, right
elseif conditionals.layoutissinglesided then
return left, right
elseif texgetcount(c_pagenoshift) % 2 == 0 then
if texgetcount(c_realpageno) % 2 == 0 then
return right, left
else
return left, right
end
else
if texgetcount(c_realpageno) % 2 == 0 then
return left, right
else
return right, left
end
end
end
function status.isleftpage(r)
if not conditionals.layoutisdoublesided then
return false
elseif conditionals.layoutissinglesided then
return false
elseif texgetcount(c_pagenoshift) % 2 == 0 then
return (r or texgetcount(c_realpageno)) % 2 == 0
else
return not (r or texgetcount(c_realpageno)) % 2 == 0
end
end
-- Instead of making these these driver specific we make them generic. We can even consider
-- to make these registers at the tex end.
local canvas = {
pagespec = "default", -- v_default
paperwidth = 0,
paperheight = 0,
topoffset = 0,
leftoffset = 0,
height = 0,
width = 0,
cropoffset = 0,
bleedoffset = 0,
trimoffset = 0,
artoffset = 0,
doublesided = false,
marked = false,
copies = false,
}
function layouts.setupcanvas(specification)
local paperheight = specification.paperheight or canvas.paperheight
local paperwidth = specification.paperwidth or canvas.paperwidth
local cropoffset = specification.cropoffset or 0
local trimoffset = cropoffset - (specification.trimoffset or 0)
local bleedoffset = trimoffset - (specification.bleedoffset or 0)
local artoffset = bleedoffset - (specification.artoffset or 0)
--
canvas.paperheight = paperheight
canvas.paperwidth = paperwidth
canvas.cropoffset = cropoffset
canvas.trimoffset = trimoffset
canvas.bleedoffset = bleedoffset
canvas.artoffset = artoffset
--
canvas.pagespec = specification.mode or pagespec
canvas.topoffset = specification.topoffset or 0
canvas.leftoffset = specification.leftoffset or 0
canvas.height = specification.height or paperheight
canvas.width = specification.width or paperwidth
canvas.marked = specification.print
--
local copies = specification.copies
if type(copies) == "number" then
if copies < 2 then
canvas.copies = false
else
canvas.copies = copies
end
end
--
local doublesided = specification.doublesided
if doublesided ~= nil then
canvas.doublesided = doublesided
end
end
function layouts.getpagedimensions()
return canvas.paperwidth, canvas.paperheight
end
function layouts.getcanvas()
return canvas
end
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