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+%D \module
+%D   [       file=strc-bkm,
+%D        version=2009.04.01,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Bookmarks,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright=\PRAGMA]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+%D This might become scrn-bkm.mkiv.
+
+\writestatus{loading}{ConTeXt Structure Macros / Bookmarks}
+
+\registerctxluafile{strc-bkm}{1.001}
+
+\unprotect
+
+%D Due to requests I finally decided to support bookmarks, a
+%D driver dependant way of showing tables of content. The most
+%D simple way of support is hooking bookmark generation into
+%D the existing list mechanisms. That way users can generate
+%D bookmarks automatically, although its entirely valid to add
+%D bookmarks by defining alternative ones. These will be added
+%D at the appropriate place in the list.
+
+% \hoofdstuk{het eerste hoofdstuk}
+%
+% \bookmark {de eerste bookmark} % optional overruled hoofdstuk
+%
+% .... text ....
+%
+% \placebookmarks [hoofdstuk,paragraaf,subparagraaf,subsubparagraaf,mylist]
+%                 [open list]
+%
+% \bookmark[mylist]{whatever}
+
+%D This will go away.
+
+\let\flushpostponedbookmark\relax
+
+%D We have better ways now.
+
+\unexpanded\def\bookmark
+  {\dosingleempty\dobookmark}
+
+\def\dobookmark[#1]#2%
+  {\begingroup
+   \simplifycommands
+   \ctxlua{structure.bookmarks.overload("#1",\!!bs\detokenize\expandafter{\normalexpanded{#2}}\!!es)}%
+   \endgroup}
+
+%D Placement \unknown\ look how simple compared to \MKII:
+
+\def\placebookmarks
+  {\dodoubleempty\doplacebookmarks}
+
+\def\doplacebookmarks[#1][#2]%
+  {\iflocation
+     \iffirstargument
+       \ctxlua{structure.bookmarks.register("#1","#2")}%
+     \else
+       \normalexpanded{\noexpand\placebookmarks[\getvalue{\??ih\v!content\c!list}]}%
+     \fi
+   \fi}
+
+\appendtoks\ctxlua{structure.bookmarks.place()}\to\everystoptext
+
+\protect \endinput
+
+% \starttext
+% \setupinteraction[state=start]\setupinteractionscreen[option=bookmark]
+% \placebookmarks[chapter,section,subsection][chapter]
+% \chapter{First}
+% \bookmark{The First Indeed}
+% \section{alpha}
+% \bookmark[chapter]{The First Indeed Again}
+% \section{beta}
+% \chapter{Second}
+% \bookmark{The Second Indeed}
+% \section{gamma \tex{radiation}}
+% \subsection{a}
+% \subsection{b}
+% \section{delta}
+% \section{epsilon}
+% \chapter{Third \relax}
+% \chapter{我〈能吞下玻璃而不傷身〉體。} % whatever that means
+% \chapter{Idris Samawi Hamid ادريس سماوي حامد}
+% \stoptext