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1if not modules then modules = { } end modules ['layo-ini'] = {
2    version   = 1.001,
3    comment   = "companion to layo-ini.mkiv",
4    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5    copyright = "PRAGMA ADE / ConTeXt Development Team",
6    license   = "see context related readme files"
7}
8
9-- We need to share information between the TeX and Lua end about the typographical
10-- model. This happens here. This code might move.
11
12local texgetcount  = tex.getcount
13local conditionals = tex.conditionals
14
15layouts = {
16    status = { },
17}
18
19local status = layouts.status
20
21function status.leftorrightpageaction(left,right)
22    if left == nil then
23        left, right = false, true
24    end
25    if not conditionals.layoutisdoublesided then
26        return left, right
27    elseif conditionals.layoutissinglesided then
28        return left, right
29    elseif texgetcount("pagenoshift") % 2 == 0 then
30        if texgetcount("realpageno") % 2 == 0 then
31            return right, left
32        else
33            return left, right
34        end
35    else
36        if texgetcount("realpageno") % 2 == 0 then
37            return left, right
38        else
39            return right, left
40        end
41    end
42end
43
44function status.isleftpage(r)
45    if not conditionals.layoutisdoublesided then
46        return false
47    elseif conditionals.layoutissinglesided then
48        return false
49    elseif texgetcount("pagenoshift") % 2 == 0 then
50        return (r or texgetcount("realpageno")) % 2 == 0
51    else
52        return not (r or texgetcount("realpageno")) % 2 == 0
53    end
54end
55