1 files changed, 26 insertions, 10 deletions
diff --git a/tex/context/base/mkxl/page-box.mklx b/tex/context/base/mkxl/page-box.mklx
index c8ceeb828..c962b831a 100644
--- a/tex/context/base/mkxl/page-box.mklx
+++ b/tex/context/base/mkxl/page-box.mklx
@@ -59,15 +59,6 @@
       \v_page_target_bottom_fill
       \v_page_target_bottom}}
 
-\def\page_boxes_apply_offset % #box
-  {\unless\ifzeropt\topoffset
-     \expandafter\page_boxes_apply_offset_indeed
-   \orelse\ifzeropt\backoffset
-     \expandafter\gobbleoneargument
-   \else
-     \expandafter\page_boxes_apply_offset_indeed
-   \fi}
-
 \def\page_boxes_apply_offset_indeed#box%
   {\scratchwidth \wd#box%
    \scratchheight\ht#box%
@@ -75,12 +66,28 @@
    \setbox#box\vpack
      {\offinterlineskip
       \vskip\topoffset
-      \hskip\doifbothsides\backoffset\backoffset{-\backoffset}%
+     %\hskip\doifbothsides\backoffset\backoffset{-\backoffset}%
+      \hskip\doifbothsides++-\backoffset
       \box#box}%
    \wd#box\scratchwidth
    \ht#box\scratchheight
    \dp#box\scratchdepth}
 
+% a variant (no gain so we stay mkiv compatible):
+%
+% \def\page_boxes_apply_offset_indeed#box% this needs testing in real situations
+%   {\boxxoffset#box\dimexpr\boxxoffset#box\doifbothsides++-\backoffset\relax
+%    \boxyoffset#box\dimexpr\boxyoffset#box-\topoffset\relax}
+
+\def\page_boxes_apply_offset % #box
+  {\unless\ifzeropt\topoffset
+     \expandafter\page_boxes_apply_offset_indeed
+   \orunless\ifzeropt\backoffset
+     \expandafter\page_boxes_apply_offset_indeed
+   \else
+     \expandafter\gobbleoneargument
+   \fi}
+
 \def\page_boxes_apply_replicate
   {\ifnum\layoutparameter\c!nx>\plusone
      \expandafter\page_boxes_apply_replicate_indeed
@@ -251,6 +258,15 @@
       \box#1}%
    \dp#1\zeropoint}
 
+% a variant (no gain so we stay mkiv compatible):
+%
+% \def\page_boxes_apply_offsets#1%
+%   {\scratchhoffset\doifbothsides\backspace\backspace{\dimexpr\paperwidth-\backspace-\makeupwidth\relax}%
+%    \boxxoffset#1\dimexpr\boxxoffset#1+\scratchhoffset\relax
+%    \boxyoffset#1\dimexpr\boxyoffset#1-\topspace\relax
+%    \wd#1\dimexpr\paperwidth+\scratchhoffset\relax
+%    \ht#1\dimexpr\paperheight+\topspace\relax}
+
 %D This is rather specialized:
 
 \newconditional\c_page_areas_enabled