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-rw-r--r--Master/texmf-dist/tex/context/base/layo-ini.lua61
1 files changed, 61 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/layo-ini.lua b/Master/texmf-dist/tex/context/base/layo-ini.lua
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index 00000000000..56ced2c0bc8
--- /dev/null
+++ b/Master/texmf-dist/tex/context/base/layo-ini.lua
@@ -0,0 +1,61 @@
+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.
+--
+-- Code might move.
+
+-- conditionals.layoutisdoublesided
+-- conditionals.layoutissinglesided
+-- texcount.pagenoshift
+-- texcount.realpageno
+
+local texcount = tex.count
+local conditionals = tex.conditionals
+
+layouts = {
+ status = { },
+}
+
+local status = layouts.status
+
+function status.leftorrightpagection(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 texcount.pagenoshift % 2 == 0 then
+ if texcount.realpageno % 2 == 0 then
+ return right, left
+ else
+ return left, right
+ end
+ else
+ if texcount.realpageno % 2 == 0 then
+ return left, right
+ else
+ return right, left
+ end
+ end
+end
+
+function status.isleftpage()
+ if not conditionals.layoutisdoublesided then
+ return false
+ elseif conditionals.layoutissinglesided then
+ return false
+ elseif texcount.pagenoshift % 2 == 0 then
+ return texcount.realpageno % 2 == 0
+ else
+ return not texcount.realpageno % 2 == 0
+ end
+end