1 files changed, 25 insertions, 0 deletions
diff --git a/tex/context/base/spac-ali.mkiv b/tex/context/base/spac-ali.mkiv
index 0f9b21186..a7ce5b971 100644
--- a/tex/context/base/spac-ali.mkiv
+++ b/tex/context/base/spac-ali.mkiv
@@ -149,6 +149,17 @@
    inline:\ifconditional \inlinelefttoright  l2r\else r2l\fi\space
    ]\endgroup}
 
+\unexpanded\def\righttolefthbox#1#{\normalhbox dir TRT #1\bgroup\righttoleft\let\next} \let\rtlhbox\righttolefthbox
+\unexpanded\def\lefttorighthbox#1#{\normalhbox dir TLT #1\bgroup\lefttoright\let\next} \let\ltrhbox\lefttorighthbox
+\unexpanded\def\righttoleftvbox#1#{\normalvbox dir TRT #1\bgroup\righttoleft\let\next} \let\rtlvbox\righttoleftvbox
+\unexpanded\def\lefttorightvbox#1#{\normalvbox dir TLT #1\bgroup\lefttoright\let\next} \let\ltrvbox\lefttorightvbox
+\unexpanded\def\righttoleftvtop#1#{\normalvtop dir TRT #1\bgroup\righttoleft\let\next} \let\rtlvtop\righttoleftvtop
+\unexpanded\def\lefttorightvtop#1#{\normalvtop dir TLT #1\bgroup\lefttoright\let\next} \let\ltrvtop\lefttorightvtop
+
+\unexpanded\def\autodirhbox#1#{\hbox#1\bgroup\synchronizeinlinedirection\let\next}
+\unexpanded\def\autodirvbox#1#{\vbox#1\bgroup\synchronizeinlinedirection\let\next} % maybe also pardir or maybe just a \vbox
+\unexpanded\def\autodirvtop#1#{\vtop#1\bgroup\synchronizeinlinedirection\let\next} % maybe also pardir or maybe just a \vtop
+
 % Tolerance and hyphenation
 
 \ifdefined\lesshyphens \else \let\lesshyphens\relax \fi
@@ -553,6 +564,20 @@
    \fi
    \raggedcommand}
 
+% experiment
+
+\unexpanded\def\spac_align_use_later#1%
+  {\begingroup
+   \edef\m_spac_align_asked{#1}%
+   \expandafter\let\expandafter\raggedcommand\csname\??alignmentnormalcache\m_spac_align_asked\endcsname
+   \ifx\raggedcommand\relax
+     \spac_align_add_to_cache
+   \fi
+   \endgroup}
+
+\unexpanded\def\spac_align_use_now#1%
+  {\csname\??alignmentnormalcache#1\endcsname}
+
 % The keywords:
 
 \unexpanded\def\installalign#1#2% beware: commands must be unexpandable!