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+%D \module
+%D   [       file=java-ini,
+%D        version=1998.01.30,
+%D          title=\CONTEXT\ JavaScript Macros,
+%D       subtitle=Initialization,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt JavaScript Macros / Initialization}
+
+\registerctxluafile{java-ini}{1.001}
+
+\unprotect
+
+%D \macros
+%D   {JS*}
+%D
+%D Because \JAVASCRIPT's are activated by the user, for
+%D instance by activating on a button, their support is closely
+%D related to the referencing mechanism. Integration takes
+%D place by
+%D
+%D \starttyping
+%D \goto{calculate total}[Sum()]
+%D \stoptyping
+%D
+%D The \type{()} classify this as a script. If they are absent,
+%D the keyword is treated as a normal reference.
+%D
+%D One can pass arguments to such a script by saying:
+%D
+%D \starttyping
+%D \goto{calculate total}[Sum(1.5,2.3)]
+%D \stoptyping
+
+
+%D \macros
+%D   {startJScode}
+%D
+%D A piece of \JAVASCRIPT\ code is defined by saying:
+%D
+%D \starttyping
+%D \startJScode{name}
+%D   name = 4 ;
+%D \stopJScode
+%D \stoptyping
+%D
+%D This assumes uses no preamble or presumes that the preamble is
+%D always loaded, the next definition also tells \CONTEXT\ to
+%D actually include the preamble needed.
+%D
+%D \starttyping
+%D \startJScode{uses} uses {later}
+%D   uses = 6 ;
+%D \stopJScode
+%D \stoptyping
+%D
+%D \macros
+%D   {startJSpreamble}
+%D
+%D One can define insert \JAVASCRIPT\ code at the document level
+%D by using:
+%D
+%D \starttyping
+%D \startJSpreamble{oeps}
+%D   oeps = 1 ;
+%D \stopJSpreamble
+%D \stoptyping
+%D
+%D which is the same as:
+%D
+%D \starttyping
+%D \startJSpreamble{now} used now
+%D   now = 2 ;
+%D \stopJSpreamble
+%D \stoptyping
+%D
+%D while the next definition is only included when actually
+%D used.
+%D
+%D \starttyping
+%D \startJSpreamble{later} used later
+%D   later = 3 ;
+%D \stopJSpreamble
+%D \stoptyping
+%D
+%D This command may be used more that once, but always before
+%D the first page is shipped out.
+%D
+%D \macros
+%D   {setJSpreamble, addtoJSpreamble}
+%D
+%D In addition to the previous preamble definitions, we can
+%D set a preamble \quote {in||line} and add tokens to a
+%D preamble.
+%D
+%D \macros
+%D   {useJSpreamblenow}
+%D
+%D This macro can be used to force inclusion of postponed
+%D \JAVASCRIPT\ preambles.
+
+\def\m_java_escape_u{\letterbackslash u}
+
+\unexpanded\def\startJScode
+  {\begingroup
+   \obeylualines
+   \obeyluatokens
+   \let\u\m_java_escape_u
+   \java_start_code}
+
+\def\java_start_code#1\stopJScode
+  {\normalexpanded{\endgroup\clf_storejavascriptcode{#1}}}
+
+\let\stopJScode\relax
+
+\unexpanded\def\startJSpreamble
+  {\begingroup
+   \obeylualines
+   \obeyluatokens
+   \let\u\m_java_escape_u
+   \java_start_preamble}
+
+\def\java_start_preamble#1\stopJSpreamble
+  {\normalexpanded{\endgroup\clf_storejavascriptpreamble{#1}}}
+
+\let\stopJSpreamble\relax
+
+\unexpanded\def\setJSpreamble  #1#2{\clf_setjavascriptpreamble  {#1}{#2}}
+\unexpanded\def\addtoJSpreamble#1#2{\clf_addtojavascriptpreamble{#1}{#2}}
+
+%D \macros
+%D   {useJSscripts}
+%D
+%D In due time, users will build their collections of scripts,
+%D which can be used (loaded) when applicable. Although not all
+%D public, we will provide some general purpose scripts,
+%D collected in files with names like \type{java-...}. One can
+%D load these scripts with \type{\useJSscripts}, like:
+%D
+%D \starttyping
+%D \useJSscripts[fld]
+%D \stoptyping
+%D
+%D The not so complicated implementation of this macro is:
+
+\unexpanded\def\useJSscripts
+  {\dodoubleempty\java_use_scripts}
+
+\def\java_use_scripts[#1][#2]%
+  {\clf_usejavascriptscripts {#1}%  two steps as this one calls tex code
+   \clf_usejavascriptpreamble{#2}}% so this one comes later
+
+\protect \endinput