+\newcount\ltj@adjdir@count@backup
+%%%% insert
+\let\orig@insert=\insert
+\protected\def\insert{\begingroup\afterassignment\ltj@@insert@A\ltj@tempcnta}
+\protected\def\ltj@@insert@A{\orig@insert\ltj@tempcnta\bgroup\aftergroup\endgroup\let\next}
+%%%% vadjust
+\let\ltj@@orig@vadjust=\vadjust
+\protected\def\vadjust{%
+ \ltj@@orig@vadjust\bgroup
+ \ifcase\ltj@adjdir@count\or\dtou\or\or\tate\or\yoko\fi
+ \aftergroup\ltj@@vadjust@check@dir\let\next}
+\protected\def\ltj@@vadjust@check@dir{%
+ \directlua{luatexja.direction.check_adjust_direction()}%
+}
+%%%% unhbox and unvbox
+\let\ltj@@orig@unhbox=\unhbox
+\let\ltj@@orig@unvbox=\unvbox
+\protected\def\unhbox{\begingroup\afterassignment\ltj@@unhbox\ltj@tempcnta}
+\protected\def\unvbox{\begingroup\afterassignment\ltj@@unvbox\ltj@tempcnta}
+\protected\def\ltj@@unhbox{%
+ \directlua{luatexja.direction.check_dir(\the\ltj@tempcnta)}%
+ \ltj@@orig@unhbox\ltj@tempcnta\endgroup}
+\protected\def\ltj@@unvbox{%
+ \directlua{luatexja.direction.check_dir(\the\ltj@tempcnta)}%
+ \ltj@@orig@unvbox\ltj@tempcnta\endgroup}
+
+%%%%%%%% \ltjgetwd<box_num> etc.
+%\def\ltjgetwd{\expandafter\expandafter\expandafter\ltj@@getwd\ltj@grab@num}
+%\def\ltjgetht{\expandafter\expandafter\expandafter\ltj@@getht\ltj@grab@num}
+%\def\ltjgetdp{\expandafter\expandafter\expandafter\ltj@@getdp\ltj@grab@num}
+\def\ltj@@getwd#1{%