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+%D \module
+%D [ file=scrn-int,
+%D version=1995.01.01,
+%D title=\CONTEXT\ Core Macros,
+%D subtitle=Interaction,
+%D author=Hans Hagen,
+%D date=\currentdate,
+%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+% evt interactionbaren runtime laden (scheelt 8K)
+
+%D Still to be done properly.
+
+\writestatus{loading}{ConTeXt Screen Macros / Interaction}
+
+\unprotect
+
+% \expand vs \expanded
+
+% linked registers implementeren als een koppeling == mooier
+
+\presetlocalframed[\??lk]
+
+\newcounter\numberoflinks
+
+\def\stelkoppelingenin
+ {\dodoubleargument\getparameters[\??lk]}
+
+\def\definieerkoppeling[#1]% % local loading !
+ {\doifundefined{\s!link:#1:\s!list}
+ {\expanded{\definetwopasslist{\s!link:#1}}% \expanded{\doloadtwopassdata{\s!link:#1}}%
+ \getfirsttwopassdata{\s!link:#1}%
+ \let\firstlink\twopassdata
+ \getlasttwopassdata{\s!link:#1}%
+ \let\lastlink\twopassdata
+ \let\noflinks\noftwopassitems
+ \gettwopassdata{\s!link:#1}%
+ \let\currentlink\twopassdata
+ \let\nextlink\twopassdata
+ \setxvalue{\s!link:#1:}{\firstlink:\lastlink:\noflinks:\currentlink:\nextlink}}}
+
+\def\koppeling[#1]#2%
+ {\bgroup
+ \definieerkoppeling[#1]%
+ \doglobal\increment\numberoflinks
+ \gettwopassdata{\s!link:#1}%
+ \def\next[##1:##2:##3:##4:##5]%
+ {\edef\firstlink {0##1}%
+ \edef\lastlink {0##2}%
+ \edef\noflinks {0##3}%
+ \edef\prevlink {0##4}%
+ \edef\currentlink{0##5}}%
+ \expanded{\next[\getvalue{\s!link:#1:}]}%
+ \edef\nextlink{0\iftwopassdatafound\twopassdata\else\lastlink\fi}%
+ \setxvalue{\s!link:#1:}{\firstlink:\lastlink:\noflinks:\currentlink:\nextlink}%
+ \lazysavetwopassdata{\s!link:#1}{\numberoflinks}{\noexpand\realfolio}%
+ \ifnum\noflinks<\plustwo
+ \locationfalse
+ \fi
+ \iflocation
+ \hbox
+ {\setinteractionparameter\c!width\!!zeropoint
+ #2\relax
+ \hskip\@@lkdistance
+ \dogotosomepage\??lk\gotobegincharacter\firstlink\hss
+ \ifnum\noflinks>\plustwo
+ \dogotosomepage\??lk\gobackwardcharacter\prevlink\hss
+ \fi
+ \ifnum\noflinks>\plustwo
+ \dogotosomepage\??lk\goforwardcharacter\nextlink\hss
+ \hskip\@@lkdistance
+ \fi
+ \dogotosomepage\??lk\gotoendcharacter\lastlink}%
+ \else
+ \hbox{#2}%
+ \fi
+ \egroup}
+
+\let\setupinteractionscreens\empty
+
+\def\docalculateinteractionscreen
+ {\doifelse\@@scwidth\v!fit
+ {\!!widtha\leftcombitotal
+ \ifdim\backspace>\!!widtha\ifdim\backspace>\zeropoint\relax
+ \advance\backspace -\!!widtha
+ \fi\fi
+ \advance\!!widtha\rightcombitotal
+ \advance\!!widtha 2\dimexpr\@@scbackspace+\@@schoroffset\relax}
+ {\doifelse\@@scwidth\v!max
+ {\!!widtha\printpaperwidth}
+ {\!!widtha\@@scwidth}}%
+ \doifelse\@@scheight\v!fit
+ {\!!heighta\dimexpr\topheight+\topdistance\relax
+ \ifdim\topspace>\!!heighta\ifdim\topspace>\zeropoint\relax
+ \advance\topspace -\!!heighta
+ \fi\fi
+ \advance\!!heighta \dimexpr\makeupheight+\bottomdistance+\bottomheight\relax
+ \advance\!!heighta 2\dimexpr\@@sctopspace+\@@scveroffset\relax}
+ {\doifelse\@@scheight\v!max
+ {\!!heighta\printpaperheight}
+ {\!!heighta\@@scheight}}%
+ \doif\@@scdelay\v!none{\let\@@scdelay\zerocountervalue}}
+
+% The macro is not to be changed; only the \@@ia-variables
+% may be set! ConTeXt is the producer but we no longer
+% mention the pragma site, since we don't want to be bothered
+% with remarks about third party documents and/or associated
+% with documents produced outside our control.
+
+\def\doprepareidentity % beware, we need to construct
+ {\let\!!stringa\@@iakeyword % an unexpanded space separated
+ \let\@@iakeyword\empty % list of keywords from a comma
+ \def\doprepareidentity##1% % separated one
+ {\ifx\@@iakeyword\empty
+ \appended\def\@@iakeyword{##1}%
+ \else
+ \appended\def\@@iakeyword{ ##1}%
+ \fi}%
+ \@EA\processcommalist\@EA[\!!stringa]\doprepareidentity
+ \global\let\doprepareidentity\relax}
+
+%D The Creator field is changed per 12/04/2006 due to user presure. This
+%D means that I need to put my own status info someplace else.
+
+\def\initializeidentity
+ {\doprepareidentity
+ \dosetupidentity % no \expanded{..} will be done in special (else no pdfdoc)
+ {\@@iatitle}{\@@iasubtitle}{\@@iaauthor}%
+ {ConTeXt - \contextversion}%
+ {\@@iadate}{\@@iakeyword}%
+ \global\let\initializeidentity\relax}
+
+\appendtoks \initializeidentity \to \everyshipout
+
+\def\initializepaper
+ {\bgroup
+ \ifx\@@ppleft \empty
+ \ifx\@@ppright\empty
+ \ifx\@@pptop \empty
+ \ifx\@@ppbottom \empty
+ \ifx\@@pcstate\v!start
+ \locationfalse\fi\else
+ \locationfalse\fi\else
+ \locationfalse\fi\else
+ \locationfalse\fi\else
+ \locationfalse\fi
+ \iflocation % without screen settings
+ \egroup
+ \dosetuppaper\papersize\paperwidth\paperheight
+ \else
+ \egroup
+ \dosetuppaper\printpapersize\printpaperwidth\printpaperheight
+ \fi}
+
+\appendtoks \initializepaper \to \everyshipout
+
+\def\doinitializepaper
+ {\bgroup
+ \docalculateinteractionscreen
+ \ifdim\!!widtha>\paperwidth\ifdim\!!widtha>\zeropoint
+ \paperwidth\!!widtha
+ \fi\fi
+ \ifdim\!!heighta>\paperheight\ifdim\!!heighta>\zeropoint
+ \paperheight\!!heighta
+ \fi\fi
+ \dosetuppaper
+ {\printpapersize}
+ {\the\paperwidth}
+ {\the\paperheight}%
+ \egroup}
+
+\let\@@pcscreendata\empty
+
+\def\dosetupinteractionscreens % met a, b en \number
+ {\doifnot\@@pcstate\v!start\dodosetupinteractionscreens}
+
+\setvalue{\??sc\c!option\v!max }{1} % tzt share with driver
+\setvalue{\??sc\c!option\v!bookmark }{2} % tzt share with driver
+\setvalue{\??sc\c!option\v!fit }{3} % tzt share with driver
+\setvalue{\??sc\c!option\v!doublesided}{4} % tzt share with driver
+
+\def\dodosetupinteractionscreens % met a, b en \number
+ {\bgroup
+ \docalculateinteractionscreen
+ \!!counte=0\getvalue{\??sc\c!option\@@scoption}\relax
+ % niet waterdicht
+ \doifnot{\the\!!widtha\the\!!heighta}\@@pcscreendata
+ {\xdef\@@pcscreendata{\the\!!widtha\the\!!heighta}%
+ \showmessage\m!interactions1{\withoutpt\the\!!widtha,\withoutpt\the\!!heighta}}%
+ % needs to be split: dimensions for each page
+ % and mode per document and only once !
+ \dosetupscreen \backoffset\topoffset\!!widtha\!!heighta{\the\!!counte}%
+ \dosetupcropbox\backoffset\topoffset\!!widtha\!!heighta
+ \egroup}
+
+\def\dosetupinteractionscreen[#1]%
+ {\getparameters[\??sc][#1]%
+ \ifproductionrun
+ \let\initializepaper\doinitializepaper
+ \let\setupinteractionscreens\dosetupinteractionscreens
+ \fi}
+
+\appendtoks \setupinteractionscreens \to \everyfirstshipout % needed to get option=max etc working
+\appendtoks \setupinteractionscreens \to \everyshipout % needed for page/screen dimensions
+
+\def\setupinteractionscreen
+ {\dosingleempty\dosetupinteractionscreen}
+
+%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}
+
+\def\@@bookmark {bm::}
+\def\@@booklevel{bl::}
+\def\@@bookcount{bc::}
+
+\definelist[\@@bookmark]
+
+\newtoks\postponedbookmarks
+
+\def\flushpostponedbookmark
+ {\the\postponedbookmarks
+ \global\postponedbookmarks\emptytoks}
+
+\def\simplebookmark#1%
+ {\doglobal\prependtoks
+ \writetolist[\@@bookmark]{}{#1}%
+ \to\postponedbookmarks}
+
+\def\complexbookmark[#1]#2%
+ {\doglobal\appendtoks\writetolist[#1]{}{#2}\to\postponedbookmarks}
+
+\definecomplexorsimple\bookmark
+
+\newif\iftracebookmarks \tracebookmarksfalse
+
+\let\tracebookmarks\tracebookmarkstrue
+
+\def\placebookmarks
+ {\dodoubleempty\doplacebookmarks}
+
+\def\doplacebookmarks[#1][#2]%
+ {\iflocation
+ \iffirstargument
+ \bgroup
+ \ifsecondargument
+ \doifelse{#2}\v!all
+ {\edef\openbookmarklist{#1}}
+ {\edef\openbookmarklist{#2}}%
+ \else
+ \let\openbookmarklist\empty
+ \fi
+ \xdef\doplacebookmarksindeed{\noexpand\dodoplacebookmarksindeed[#1][\openbookmarklist]}
+ \egroup
+ \else
+ \expanded{\placebookmarks\@EA[\getvalue{\??ih\v!content\c!list}]}%
+ \fi
+ \fi}
+
+\def\dodoplacebookmarksindeed[#1][#2]%
+ {\bgroup
+ \edef\openbookmarklist{#2}%
+ \global\let\bookmarklevellist\empty
+ \def\bookmarklevelcount{0}%
+ \doprocessbookmarks[#1]\dogetbookmarkelement
+ \dolistelement{}{}{}{}{}{}% needed to finish the first pass
+ \doprocessbookmarks[#1]\doputbookmarkelement
+ \flushbookmark
+ \egroup}
+
+\let\doplacebookmarksindeed\relax
+
+\prependtoks
+ \doplacebookmarksindeed % new, now postponed so that halfway defined commands work out ok
+\to \everystoptext
+
+\def\doprocessbookmarks[#1]#2%
+ {\let\dolistelement#2\relax
+ \scratchcounter\zerocount
+ \def\docommand##1%
+ {\advance\scratchcounter \plusone
+ \getlistlevel[##1]\listlevel{\the\scratchcounter}%
+ \setxvalue{\@@bookcount\the\scratchcounter}{1}%
+ \setxvalue{\@@booklevel##1}{\listlevel}}%
+ \processcommalist[#1]\docommand
+ \setxvalue{\@@bookcount0}{1}%
+ \global\chardef\currentbookmarklevel\zerocount
+ \global\chardef\previousbookmarklevel\zerocount
+ \doutilities{listentries,#1,\@@bookmark}\jobname{#1}\relax\relax}
+
+\def\dodogetbookmarkelement#1#2#3#4#5#6%
+ {\doifelsenothing{#1}
+ {\global\chardef\currentbookmarklevel\zerocount}
+ {\global\chardef\currentbookmarklevel\getvalue{\@@booklevel#1}\relax}%
+ \ifnum\currentbookmarklevel>\previousbookmarklevel
+ \setxvalue{\@@bookcount\the\currentbookmarklevel}{1}%
+ \else\ifnum\currentbookmarklevel<\previousbookmarklevel
+ \bgroup
+ \!!counta\previousbookmarklevel
+ \doloop
+ {\let\bookmarktag\empty
+ \!!countb\!!counta
+ \advance\!!countb \minusone
+ \dorecurse\!!countb
+ {\edef\bookmarktag
+ {\bookmarktag\getvalue{\@@bookcount\recurselevel}:}}%
+ \edef\bookmarklevelcount
+ {\getvalue{\@@bookcount\the\!!counta}}%
+ \xdef\bookmarklevellist
+ {\bookmarklevellist/\bookmarktag:\bookmarklevelcount/}%
+ \advance\!!counta \minusone
+ \ifnum\!!counta=\currentbookmarklevel
+ \exitloop
+ \fi}%
+ \egroup
+ \@EA\doglobal\@EA\increment\csname \@@bookcount\the\currentbookmarklevel\endcsname\relax
+ \else
+ \@EA\doglobal\@EA\increment\csname \@@bookcount\the\previousbookmarklevel\endcsname\relax
+ \fi\fi
+ \global\utilitydonetrue
+ \global\chardef\previousbookmarklevel\currentbookmarklevel}
+
+\def\getbookmarklevelcount
+ {\@EA\def\@EA\docommand\@EA[\@EA##\@EA1\@EA/\bookmarktag:##2/##3]%
+ {\def\bookmarklevelcount{##2}}%
+ \@EA\@EA\@EA\docommand\@EA\@EA\@EA[\@EA\bookmarklevellist\@EA/\bookmarktag:0/]}
+
+\def\dodoputbookmarkelement#1#2#3#4#5#6%
+ {\doifelsenothing{#1}
+ {\global\chardef\currentbookmarklevel\zerocount}
+ {\global\chardef\currentbookmarklevel\getvalue{\@@booklevel#1}\relax}%
+ \ifnum\currentbookmarklevel>\previousbookmarklevel
+ \setxvalue{\@@bookcount\the\currentbookmarklevel}{1}%
+ \else\ifnum\currentbookmarklevel<\previousbookmarklevel
+ \@EA\doglobal\@EA\increment\csname \@@bookcount\the\currentbookmarklevel\endcsname\relax
+ \else
+ \@EA\doglobal\@EA\increment\csname \@@bookcount\the\previousbookmarklevel\endcsname\relax
+ \fi\fi
+ \let\bookmarktag\empty
+ \!!countb\currentbookmarklevel
+ \dorecurse\!!countb
+ {\edef\bookmarktag
+ {\bookmarktag\getvalue{\@@bookcount\recurselevel}:}}%
+ \getbookmarklevelcount
+ \iftracebookmarks
+ \bgroup
+ \par
+ \bookmarktag\quad
+ \dorecurse\currentbookmarklevel{\quad}\unskip#1\quad
+ (\bookmarklevelcount)\quad
+ \egroup
+ \fi
+ \global\chardef\previousbookmarklevel\currentbookmarklevel
+ \global\utilitydonetrue
+ \insertsomebookmark{#1}{\the\currentbookmarklevel}{\bookmarklevelcount}{#4}{#6}}
+
+\def\dogetbookmarkelement#1#2#3#4#5#6%
+ {\doifnot{#1}\@@bookmark
+ {\dodogetbookmarkelement{#1}{#2}{#3}{#4}{#5}{#6}}}
+
+\def\doputbookmarkelement#1#2#3#4#5#6%
+ {\doifelse{#1}\@@bookmark
+ {\localbookmark{#4}}
+ {\flushbookmark
+ \dodoputbookmarkelement{#1}{#2}{#3}{#4}{#5}{#6}}}
+
+\let\flushbookmark\relax
+\let\localbookmark\gobbleoneargument
+
+\def\insertsomebookmark#1#2#3#4#5%
+ {\gdef\flushbookmark
+ {\doinsertsomebookmark{#1}{#2}{#3}{#4}{#5}{g}}%
+ \gdef\localbookmark##1%
+ {\doinsertsomebookmark{#1}{#2}{#3}{##1}{#5}{l}}}
+
+\def\doinsertsomebookmark#1#2#3#4#5#6%
+ {\global\utilitydonetrue
+ \global\let\localbookmark\gobbleoneargument
+ \global\let\flushbookmark\relax
+ \doifinstringelse{#1}\openbookmarklist
+ {\chardef\openbookmark\plusone}
+ {\chardef\openbookmark\zerocount}%
+ \iftracebookmarks(#6: #4)\quad(\the\openbookmark)\par\fi
+ \doinsertbookmark{#2}{#3}{#4}{#5}{\openbookmark}}
+
+% \startinteractionmenu[rechts]
+% \but [eerste] eerste \\
+% \txt hello world \\
+% \but [tweede] tweede \\
+% \nop \\
+% \but [tweede] tweede \\
+% \rul whow \\
+% \but [tweede] tweede \\
+% \raw hello world \\
+% \but [tweede] tweede \\
+% \com \vfill \\
+% \but [derde] derde \\
+% \stopinteractionmenu
+
+\newif\iflocationmenupermitted
+
+\def\testinteractionmenu#1%
+ {\iflocation
+ \doifelse\@@iamenu\v!on
+ {\doifelsevalue{\??am#1\c!state}\v!start
+ {\global\locationmenupermittedtrue}
+ {\global\locationmenupermittedfalse}}
+ {\global\locationmenupermittedfalse}%
+ \else
+ \global\locationmenupermittedfalse
+ \fi}
+
+\def\dodisableinteractionmenu[#1][#2][#3]%
+ {\def\dododisableinteractionmenu##1%
+ {\doifelse{#3}{}
+ {\letvalue{\??am##1\c!obstruction}\empty}
+ {\edef\interactieblokkade{\getvalue{\??am##1\c!obstruction}}
+ \def\docommand####1{#1{####1}{\interactieblokkade}}% #1 = \remove or \add
+ \processcommalist[#3]\docommand
+ \setevalue{\??am##1\c!obstruction}{\interactieblokkade}}}%
+ \processcommalist[#2]\dododisableinteractionmenu}
+
+\def\disableinteractionmenu
+ {\dotripleempty\dodisableinteractionmenu[\addtocommalist]}
+
+\def\enableinteractionmenu
+ {\dotripleempty\dodisableinteractionmenu[\removefromcommalist]}
+
+% ja : kader/achtergrond met tekst
+% leeg : kader/achtergrond maar geen tekst
+% nee : alleen ruimte reserveren
+% geen : helemaal weglaten
+
+\newif\iflocationdummy
+\newif\ifskippedmenuitem
+
+\newif\iflocationempty
+\newif\iflocationclick
+
+% ja : kader/achtergrond met tekst
+% leeg : kader/achtergrond maar geen tekst
+% nee : alleen ruimte reserveren
+% geen : helemaal weglaten
+%
+% \setupinteractionmenu[right][samepage=yes, unknownreference=yes]
+% \setupinteractionmenu[right][samepage=empty,unknownreference=empty]
+% \setupinteractionmenu[right][samepage=no, unknownreference=no]
+% \setupinteractionmenu[right][samepage=none, unknownreference=none]
+%
+% \startinteractionmenu[right]
+% \but [firstpage] first \\
+% \but [lastpage] last \\
+% \but [somepage] crap \\
+% \stopinteractionmenu
+
+\def\dosetlocationboxcontent#1[#2]#3[#4]%
+ {\global\skippedmenuitemfalse
+ \setbox\locationbox\hbox
+ {\resetgoto % anders cyclische aanroep !
+ \localframed[#1][#2]{\dolocationattributes{#1}\c!style\c!color{#3}}}%
+ \iflocationclick
+ \hbox{\gotolocation{#4}{\box\locationbox}}%
+ \else
+ \hbox{\box\locationbox}%
+ \fi}
+
+\let\dosetlocationboxyes\dosetlocationboxcontent
+
+\def\dosetlocationboxempty#1[%
+ {\dosetlocationboxcontent{#1}[\c!empty=\v!yes,}
+
+\def\dosetlocationboxno#1[%
+ {\dosetlocationboxcontent{#1}[\c!empty=\v!yes,\c!frame=,\c!background=,}
+
+\def\dosetlocationboxnone#1[#2]#3[#4]%
+ {\global\skippedmenuitemtrue}
+
+\def\setlocationboxyes#1[#2]#3[#4]%
+ {\locationclicktrue
+ \setbox\locationbox\hbox
+ {\resetgoto % anders cyclische aanroep !
+ \global\skippedmenuitemfalse
+ \gotolocation
+ {#4}% % needed
+ {\ifrealreferencepage
+ \ifcase\csname\??am\??am\csname#1\c!samepage\endcsname\endcsname\relax
+ \copycsname#1\c!color\endcsname\csname#1\c!contrastcolor\endcsname
+ \localframed[#1][#2]{\dolocationattributes{#1}\c!style\c!color{#3}}%
+ \or
+ \localframed[#1][\c!empty=\v!yes,#2]{\dolocationattributes{#1}\c!style\c!color{#3}}%
+ \or
+ \localframed[#1][\c!empty=\v!yes,\c!frame=,\c!background=,#2]{\dolocationattributes{#1}\c!style\c!color{#3}}%
+ \or
+ \global\skippedmenuitemtrue
+ \fi
+ \else
+ \localframed[#1][#2]{\dolocationattributes{#1}\c!style\c!color{#3}}%
+ \fi}}%
+ \ifskippedmenuitem\else\box\locationbox\fi}
+
+\def\setlocationboxnop#1[#2]#3[#4]% inefficient as text can be outside box
+ {\locationclickfalse
+ \setbox\locationbox\hbox
+ {\resetgoto % anders cyclische aanroep !
+ \global\skippedmenuitemfalse
+ \ifcase\csname\??am\??am\csname#1\c!unknownreference\endcsname\endcsname\relax
+ \localframed[#1][#2]{\dolocationattributes{#1}\c!style\c!color{#3}}%
+ \or
+ \localframed[#1][\c!empty=\v!yes,#2]{\dolocationattributes{#1}\c!style\c!color{#3}}%
+ \or
+ \localframed[#1][\c!empty=\v!yes,\c!frame=,\c!background=,#2]{\dolocationattributes{#1}\c!style\c!color{#3}}%
+ \or
+ \global\skippedmenuitemtrue
+ \fi}%
+ \ifskippedmenuitem\else\box\locationbox\fi}
+
+\def\setlocationboxraw#1[#2]#3[#4]%
+ {\localframed[#1][#2]{\dolocationattributes{#1}\c!style\c!color{#3}}}
+
+\def\setlocationbox#1[#2]#3[#4]%
+ {\bgroup % really needed !
+ \edef\permittedreferences{\csname#1\c!obstruction\endcsname}%
+ \doifreferencepermittedelse{#4}%
+ {\setlocationboxyes{#1}[#2]{#3}[#4]}%
+ {\setlocationboxnop{#1}[#2]{#3}[#4]}%
+ \egroup}
+
+\def\setlocationnop#1[#2]#3%
+ {\localframed[#1][#2]{#3}}
+
+\def\executeamboxcommands#1#2#3#4#5%
+ {%\processaction
+ % [\getvalue{\??am#1\c!dummy}]
+ % [ \v!yes=>\chardef\handleunknownmenuitem=0\relax,
+ % \v!empty=>\chardef\handleunknownmenuitem=1\relax,
+ % \v!no=>\chardef\handleunknownmenuitem=2\relax]%
+ \getvalue{\??am#1#3}\relax
+ \setamboxcommands{#1}{#4}%
+ \ignorespaces#2\unskip
+ \getvalue{\??am#1#5}}
+
+\newcounter\currentamposition
+
+\newtoks\everysetmenucommands
+
+\def\setamboxcommands#1#2%
+ {\def\currentmenu{#1}% % kan nog eerder
+ \def\currentsubmenu{#2}% % ? ?
+ \doglobal\newcounter\currentamposition
+ \the\everysetmenucommands}
+
+\def\menu@@amboxcommand#1\\%
+ {\dontleavehmode
+ \bgroup
+ \ignorespaces#1\unskip\relax
+ \ifskippedmenuitem \else
+ \getvalue{\??am\currentmenu\currentsubmenu}%
+ \fi
+ \egroup
+ \ignorespaces}
+
+\appendtoks
+ \let\@@amboxcommand\menu@@amboxcommand
+\to \everysetmenucommands
+
+\def\menu@raw[#1]#2\\%
+ {\@@amboxcommand\gotobox{\ignorespaces#2\unskip}[#1]\\}%
+
+\def\menu@but[#1]#2\\%
+ {\@@amboxcommand\do@@amposition\currentmenu{#1}{\setlocationbox{\??am\currentmenu}[]{\ignorespaces#2\unskip}[#1]}\\}%
+
+\def\menu@got[#1]#2\\% pas op! offset
+ {\@@amboxcommand\setlocationbox{\??am\currentmenu}[\c!frame=\v!off,\c!background=]{\ignorespaces#2\unskip}[#1]\\}%
+
+\def\menu@nop#1\\%
+ {\@@amboxcommand\setlocationboxraw{\??am\currentmenu}[\c!frame=\v!off,\c!background=,\c!empty=\v!yes]{\ignorespaces#1\unskip}[]\\}%
+
+\def\menu@txt#1\\%
+ {\@@amboxcommand\localframed[\??am\currentmenu][\c!frame=\v!off,\c!background=]{\ignorespaces#1\unskip}\\}%
+
+\def\menu@rul#1\\% ook \do@@amposition !
+ {\@@amboxcommand\localframed[\??am\currentmenu][]{\ignorespaces#1\unskip}\\}%
+
+\def\menu@com#1\\%
+ {\ignorespaces#1\unskip\ignorespaces}%
+
+\appendtoks
+ \let\raw\menu@raw
+ \let\but\menu@but
+ \let\got\menu@got
+ \let\nop\menu@nop
+ \let\txt\menu@txt
+ \let\rul\menu@rul
+ \let\com\menu@com
+\to \everysetmenucommands
+
+\ifx\do@@amposition\undefined
+ \let\do@@amposition\gobbletwoarguments % hook for positional thingies
+\fi
+
+\let\currentmenu\empty
+
+% beware : never change the concept of pbgoffset
+
+\def\menuparameter#1{\csname\??am\currentmenu#1\endcsname}
+
+\def\@@amhbox#1#2#3#4%
+ {\def\currentmenu{#3}%
+ \testinteractionmenu{#3}%
+ \iflocationmenupermitted
+ \bgroup
+ \showcomposition
+ \scratchdimen\dimexpr
+ \makeupwidth
+ +\pagebackgroundhoffset
+ +\pagebackgroundhoffset
+ -\menuparameter\c!leftoffset
+ -\menuparameter\c!rightoffset
+ \relax
+ \setbox\scratchbox\hbox to \scratchdimen
+ {\forgetall\executeamboxcommands{#3}{#4}\c!left\c!middle\c!right}%
+ \setbox\scratchbox\hbox{\do@@ammenuposition{#3}{\box\scratchbox}}%
+ \wd\scratchbox\makeupwidth % geen \ht=#2 setting (yet)
+ \hskip\dimexpr-\pagebackgroundhoffset+\menuparameter\c!leftoffset\relax
+ \box\scratchbox
+ \egroup
+ \else
+ #1\relax
+ \fi}
+
+\def\@@amvbox#1#2#3#4% don't change skipping, this one works!
+ {\def\currentmenu{#3}%
+ \testinteractionmenu{#3}%
+ \iflocationmenupermitted
+ \bgroup
+ \showcomposition
+ \scratchdimen\dimexpr
+ \textheight
+ +\pagebackgroundvoffset
+ +\pagebackgroundvoffset
+ +\pagebackgrounddepth
+ -\menuparameter\c!topoffset
+ -\menuparameter\c!bottomoffset
+ \relax
+ \setbox\scratchbox\vbox to \scratchdimen
+ {\forgetall % Voor't geval de afstand
+ %\setupblank[\v!standard]% % (tijdelijk) is aangepast.
+ \restorestandardblank
+ \hsize#2\relax
+ \executeamboxcommands{#3}{#4}\c!before\c!inbetween\c!after}%
+ \setbox\scratchbox\vbox{\hbox{\do@@ammenuposition{#3}{\box\scratchbox}}}%
+ \setbox\scratchbox\vbox
+ {\ht\scratchbox\zeropoint
+ \vskip\dimexpr-\pagebackgroundvoffset+\menuparameter\c!topoffset\relax
+ \box\scratchbox
+ \vskip\pagebackgroundvoffset}% overbodig
+ \ht\scratchbox\textheight
+ \wd\scratchbox#2\relax
+ \box\scratchbox
+ \egroup
+ \else
+ #1\relax
+ \fi}
+
+\ifx\do@@ammenuposition\undefined
+ \let\do@@ammenuposition\gobbleoneargument % hook for positional thingies
+\fi
+
+\setvalue{\??am\s!do\v!right }{\@@amvbox{\dodummypageskip\v!right }\rightedgewidth}
+\setvalue{\??am\s!do\v!left }{\@@amvbox{\dodummypageskip\v!left }\leftedgewidth }
+\setvalue{\??am\s!do\v!top }{\@@amhbox{\dodummypageskip\v!top }\topheight }
+\setvalue{\??am\s!do\v!bottom}{\@@amhbox{\dodummypageskip\v!bottom}\bottomheight }
+
+\def\dointeractionmenu#1#2%
+ {\getvalue{\??am\s!do\getvalue{\??am#1\c!location}}{#1}{#2}}
+
+\unexpanded\def\interactionmenu[#1]%
+ {\getvalue{\??am\c!menu#1}}
+
+\def\horizontalinteractionmenu#1#2#3#4%
+ {\ifdim#2>\zeropoint % new
+ \scratchdimen\zeropoint
+ \setbox\scratchbox\hbox
+ {\def\docommand##1%
+ {\doifnotvalue{\??am##1\c!state}\v!none
+ {\hskip\scratchdimen
+ \setbox2\hbox to #2
+ {\getvalue{\??am##1#3}\interactionmenu[##1]\getvalue{\??am##1#4}}%
+ \doifelsevalue{\??am##1\c!distance}\v!overlay
+ {\scratchdimen\zeropoint
+ \wd2\zeropoint}%
+ {\scratchdimen\getvalue{\??am##1\c!distance}}%
+ \box2}}%
+ \startinteraction
+ \processcommacommand[\getvalue{\??am#1}]\docommand
+ \stopinteraction}%
+ \wd\scratchbox#2\relax
+ \box\scratchbox
+ \fi}
+
+\def\verticalinteractionmenu#1#2#3#4%
+ {\ifdim#2>\zeropoint % new
+ \scratchdimen\zeropoint
+ \setbox\scratchbox\vbox
+ {\def\docommand##1%
+ {\doifnotvalue{\??am##1\c!state}\v!none
+ {\vskip\scratchdimen
+ \setbox2\vbox to #2
+ {\getvalue{\??am##1#3}\interactionmenu[##1]\getvalue{\??am##1#4}}%
+ \doifelsevalue{\??am##1\c!distance}\v!overlay
+ {\scratchdimen\zeropoint
+ \offinterlineskip
+ \dp2\zeropoint
+ \ht2\zeropoint}%
+ {\scratchdimen\getvalue{\??am##1\c!distance}}%
+ \box2}}%
+ \startinteraction
+ \processcommacommand[\getvalue{\??am#1}]\docommand
+ \stopinteraction}%
+ \ht\scratchbox#2\relax
+ \dp\scratchbox\zeropoint
+ \box\scratchbox
+ \fi}
+
+\letvalue{\??am\v!left }\empty
+\letvalue{\??am\v!right}\empty
+\letvalue{\??am\v!top }\empty
+\letvalue{\??am\v!bottom }\empty
+
+% todo : \defineinteractionmenuclass
+
+\def\interactionmenus[#1]%
+ {\iflocation
+ \getvalue{\??am\??am\c!menu#1}%
+ \else
+ \dodummypageskip{#1}%
+ \fi}
+
+\setvalue{\??am\??am\c!menu\v!left }{\horizontalinteractionmenu\v!left \leftedgewidth \c!left \c!right}
+\setvalue{\??am\??am\c!menu\v!right }{\horizontalinteractionmenu\v!right \rightedgewidth\c!left \c!right}
+\setvalue{\??am\??am\c!menu\v!top }{\verticalinteractionmenu \v!top \topheight \c!before\c!after}
+\setvalue{\??am\??am\c!menu\v!bottom}{\verticalinteractionmenu \v!bottom\bottomheight \c!before\c!after}
+
+% this can be implemented with the following command (which
+% is new, undocumented, experimental, untested, etc etc)
+
+\def\defineinteractionmenuclass
+ {\dodoubleargument\dodefineinteractionmenuclass}
+
+\def\dodefineinteractionmenuclass[#1][#2]% tag hori|veri
+ {\doifelse{#2}\v!vertical
+ {\setvalue{\??am\??am\c!menu#1}{\verticalinteractionmenu {#1}{\getvalue{\??am#1\c!width }}\c!before\c!after}}
+ {\setvalue{\??am\??am\c!menu#1}{\horizontalinteractionmenu{#1}{\getvalue{\??am#1\c!height}}\c!left\c!right }}}
+
+% \setupinteraction[menu=on,state=start]
+%
+% \defineinteractionmenuclass[test] [vertical]
+% \defineinteractionmenuclass[another][horizontal]
+%
+% \defineinteractionmenu[test] [left][state=start,width=4cm]
+% \defineinteractionmenu[another][top] [state=start,height=1cm]
+%
+% \startinteractionmenu[test]
+% \but [firstpage] test-a \\
+% \but [nextpage] test-b \\
+% \stopinteractionmenu
+%
+% \startinteractionmenu[another]
+% \but [firstpage] test-a \\
+% \but [nextpage] test-b \\
+% \stopinteractionmenu
+%
+% \setupheadertexts[{\interactionmenu[another]}]
+%
+% \starttext
+%
+% test \interactionmenu[test] \page
+% test \interactionmenu[test] \page
+%
+% \stoptext
+
+%D This can save complicated menu macros when one want to
+%D keep control over parts of a menu (i.e.\ turn them on and
+%D off). We could have achieved something similar with modes.
+
+\def\local@@ambox#1#2#3#4% don't change skipping, this one works!
+ {\bgroup
+ \testinteractionmenu{#3}%
+ \iflocationmenupermitted
+ \executeamboxcommands{#3}{#4}\c!before\c!inbetween\c!after
+ \else
+ #1\relax
+ \fi
+ \egroup}
+
+\def\includemenu[#1]%
+ {\doifvalue{\??am#1\c!state}\v!local
+ {\bgroup
+ \letvalue{\??am#1\c!state}\v!start
+ \let\@@amvbox\local@@ambox
+ \let\@@amhbox\local@@ambox
+ \getvalue{\??am\c!menu#1}%
+ \egroup}}
+
+%D We also need an explicit position control some day. I'll
+%D do that when I need it. [The stacking order.]
+
+\newif\ifextendedmenu
+
+% [name] [location]
+% [name] [location] [pars]
+
+\def\defineinteractionmenu
+ {\dotripleempty\dodefineinteractionmenu}
+
+\def\dodefineinteractionmenu[#1][#2][#3]%
+ {% main settings
+ \letvalue{\??am\c!menu#1}\empty
+ \setvalue{\@@dodolistelement#1}{\def\dosomelistelement{\dodomenulistelement{#1}}}%
+ \presetlocalframed[\??am#1]%
+ % register location
+ \expanded{\addtocommalist{#1}\@EA\noexpand\csname\??am#2\endcsname}%
+ % inherit settings
+ \doifnot{#1}{#2}
+ {\copyparameters[\??am#1][\??am#2]
+ [\c!left,\c!middle,\c!right,\c!before,\c!after,\c!inbetween,%
+ \c!width,\c!height,\c!distance,\c!offset,%
+ \c!frame,\c!framecolor,\c!rulethickness,%
+ \c!background,\c!backgroundcolor,\c!backgroundscreen,%
+ \c!style,\c!color,\c!contrastcolor,\c!samepage,\c!unknownreference,%
+ \c!leftoffset,\c!rightoffset,\c!topoffset,\c!bottomoffset]}%
+ % additional settings
+ \getparameters[\??am#1][\c!location=#2,\c!obstruction=,#3]}
+
+\def\setupinteractionmenu
+ {\dodoubleargument\dosetupinteractionmenu}
+
+\def\dosetupinteractionmenu[#1][#2]%
+ {\def\docommand##1{\getparameters[\??am##1][#2]}%
+ \processcommalist[#1]\docommand}
+
+\expandafter\chardef\csname\??am\??am\v!yes \endcsname\zerocount
+\expandafter\chardef\csname\??am\??am\v!empty\endcsname\plusone
+\expandafter\chardef\csname\??am\??am\v!no \endcsname\plustwo
+\expandafter\chardef\csname\??am\??am\v!none \endcsname\plusthree
+\expandafter\chardef\csname\??am\??am \endcsname\plusone % default
+
+\processbetween{\v!interactionmenu}\dostartinteractionmenu
+
+\def\dostartinteractionmenu#1%
+ {\dodostartinteractionmenu#1\dodostopinteractionmenu}
+
+\def\dodostartinteractionmenu[#1]#2\dodostopinteractionmenu
+ {\setvalue{\??am\c!menu#1}{\extendedmenutrue\dointeractionmenu{#1}{#2}}}
+
+\def\resetinteractionmenu[#1]%
+ {\letvalue{\??am\c!menu#1}\empty}
+
+\def\dodomenulistelement#1#2#3#4#5#6#7%
+ {\setbox0=\hbox
+ {\let\gotolocation\gobbleoneargument % hack to catch last []
+ %\locationclickfalse % ipv ^
+ \docheckrealreferencepage{#7}%
+ \setlocationboxyes
+ {\??am#1}% % needed !
+ []% no settings
+ {\limitatetext{#5}{\getvalue{\??li#2\c!maxwidth}}{\unknown}}% % needed !
+ []}% normally the destination, catch by gobble
+ \@@amboxcommand\do@@amposition{#1}{#7}% beware, we pass the pagenumber
+ {\ignorespaces\linklisttoelement{#3}{#6}{#7}{\box0}\unskip}\\}
+
+% \scherm moet worden als \page
+
+\def\screen
+ {\dosingleempty\doscreen}
+
+\def\doscreen[#1]%
+ {\iflocation\page[#1]\fi}
+
+\unexpanded\def\menubutton
+ {\dodoubleempty\domenubutton}
+
+\def\domenubutton[#1]%
+ {\iffirstargument
+ \ifsecondargument
+ \@EAEAEA\domenubuttonB
+ \else
+ \doifassignmentelse{#1}
+ {\@EAEAEA\domenubuttonC}
+ {\@EAEAEA\domenubuttonD}%
+ \fi
+ \else
+ \@EA\domenubuttonA
+ \fi[#1]}
+
+\def\domenubuttonA[#1][#2]#3[#4]% normal button, no parameters
+ {\bgroup
+ %\locationdummytrue
+ \setlocationbox\??bt[]{#3}[#4]%
+ \egroup}
+
+\def\domenubuttonB[#1][#2]#3[#4]% menu button, with parameters
+ {\bgroup
+ %\locationdummytrue
+ \setlocationbox{\??am#1}[#2]{#3}[#4]%
+ \egroup}
+
+\def\domenubuttonC[#1][#2]#3[#4]% normal button, with parameters
+ {\bgroup
+ %\locationdummytrue
+ \setlocationbox\??bt[#1]{#3}[#4]%
+ \egroup}
+
+\def\domenubuttonD[#1][#2]#3[#4]% menu button, no parameters
+ {\bgroup
+ %\locationdummytrue
+ \setlocationbox{\??am#1}[]{#3}[#4]%
+ \egroup}
+
+\def\menubox
+ {\dodoubleempty\domenubox}
+
+\def\domenubox[#1][#2]#3%
+ {\bgroup
+ \let\setlocationbox\setlocationboxraw
+ \domenubutton[#1][#2]#3[]%
+ \egroup}
+
+% Hier volgen de synchronisatiemacro's:
+
+\def\syncprefix{sync}
+
+%def\syncmarker{syncmark}
+%\definemarking[\syncmarker]
+%\setupmarking[\syncmarker][\c!expansie=\v!ja]
+
+\newmark\syncmarker
+
+\newcounter\synccounter
+
+\newif\ifsynchronisation
+
+\def\startsynchronization%
+ {\iflocation\ifsynchronisation
+ \doglobal\increment\synccounter
+ \fi\fi}
+
+\def\stopsynchronization%
+ {\iflocation\ifsynchronisation
+ %\thisisdestination{\syncprefix:\synccounter}%
+ \pagereference[\syncprefix:\synccounter]%
+ \ifvmode
+ \@EA\setmark\@EA\syncmarker\@EA{\synccounter} % \marking[\syncmarker]{\synccounter}%
+ \else
+ \showmessage\m!interactions4\synccounter
+ \fi
+ \fi\fi}
+
+\def\synchronize%
+ {\startsynchronization
+ \stopsynchronization}
+
+\def\dosetupsynchronization[#1]%
+ {\getparameters[\??sy][#1]%
+ \doifelse\@@systate\v!start
+ \synchronisationtrue
+ \synchronisationfalse}
+
+\def\setupsynchronization
+ {\dosingleargument\dosetupsynchronization}
+
+\def\definesynchronization
+ {\dosingleargument\dodefinesynchronization}
+
+\def\setupsynchronizationbar
+ {\dodoubleargument\getparameters[\??ba]}
+
+\presetlocalframed[\??ba]
+
+\setvalue{synchronisatie\v!page}[#1]%
+ {\bgroup
+ %\setupinteraction[\c!width=\!!zeropoint]%
+ \setinteractionparameter\c!width\!!zeropoint
+ \setbox0\hbox
+ {\localframed[\??ba][]{\dolocationattributes\??ba\c!style\c!color{\strut\@@batext}}}%
+ \dontcomplain
+ \def\atthebottom
+ {\leaders\hrule\!!depth1ex\!!height-.5ex\hfil}%
+ \def\atthetop##1##2##3%
+ {\dimen0=\wd0
+ \divide\dimen0 3
+ \multiply\dimen0 ##2\relax
+ \dimen2=.25em % brrr
+ \advance\dimen0 -##3\dimen2
+ %\gotodestination
+ % {}{#1}{\syncprefix:##1}{}
+ % {\hbox to \dimen0{\color[\locationcolor\@@bacolor]{\atthebottom}}}}%
+ \gotobox
+ {\hbox to \dimen0{\color[\locationcolor\@@bacolor]{\atthebottom}}}%
+ [#1::\syncprefix:##1]}%
+ \hbox
+ {\def\check##1##2%
+ {\edef##2{0##1\syncmarker}%
+ \ifnum0##2=0 \def##2{1}\fi}%
+ \check\gettopmark\top
+ \check\getfirstmark\first
+ \check\getbotmark\bot
+ \setbox2\hbox to \wd0
+ {\ifnum\top=\first\relax
+ \ifnum\first=\bot\relax
+ \atthetop\first30\relax
+ \else
+ \atthetop\first21\hss\atthetop\bot11\relax
+ \fi
+ \else
+ \ifnum\first=\bot\relax
+ \atthetop\top11\hss\atthetop\first21\relax
+ \else
+ \atthetop\top11\hss\atthetop\first11\hss\atthetop\bot11\relax
+ \fi
+ \fi}%
+ \wd2=\zeropoint\box2
+ \box0\relax}%
+ \egroup}
+
+\setvalue{synchronisatie\v!local}[#1]%
+ {\bgroup
+ %\setupinteraction[\c!width=\!!zeropoint]%
+ \setinteractionparameter\c!width\!!zeropoint
+ \def\blackrule{\hbox{\vrule\!!height.5em\!!width.5em}}%
+ %\gotodestination
+ % {}{##1}{\syncprefix:#1}{0}
+ % {\color[\locationcolor\@@bacolor]{\blackrule}}%
+ \gotobox %
+ {\color[\locationcolor\@@bacolor]{\blackrule}}%
+ [#1::\syncprefix:\synccounter]%
+ \egroup}
+
+\def\synchronizationbar[#1][#2]%
+ {\iflocation\ifsynchronisation
+ \bgroup
+ \setupsynchronizationbar
+ [\c!text=\getvalue{doc:des:#1},#2]%
+ \getvalue{synchronisatie\@@baalternative}[#1]%
+ \egroup
+ \fi\fi}
+
+% A nice application of glue. All this code will be rewritten and
+% generalized.
+
+\newbox\interactionbarbox
+
+\newif\ifbarsymbol
+
+\def\dogotosomepage#1#2#3% nog checken !
+ {\checkreferences % nodig ??
+ \hbox
+ {\iflocation
+ \ifnum#3=\realpageno
+ #2%
+ \else
+ \gotorealpage\empty\empty{#3}{\doifsomething{#1}{\dolocationattributes{#1}\c!style\c!color}{#2}}%
+ \fi
+ \else
+ #2%
+ \fi}}
+
+\def\dogotosomecontrastpage#1#2#3% nog checken, may replace previous
+ {\checkreferences % nodig ??
+ \hbox
+ {\iflocation
+ \ifnum#3=\realpageno
+ \gotorealpage\empty\empty{#3}{\doifsomething{#1}{\dolocationattributes{#1}\c!style\c!contrastcolor}{#2}}%
+ \else
+ \gotorealpage\empty\empty{#3}{\doifsomething{#1}{\dolocationattributes{#1}\c!style\c!color}{#2}}%
+ \fi
+ \else
+ #2%
+ \fi}}
+
+\presetlocalframed[\??ib]
+
+\def\interactionbara % we need better control over contrastcolor
+ {\iflocation % maybe just use gotopage and set colors
+ \bgroup
+ \setinteractionparameter\c!width\zeropoint
+ \setupblackrules[\c!height=\v!max,\c!depth=\v!max]%
+ \!!widthb\dimexpr\@@ibwidth-2.75\emwidth\relax
+ \!!widtha\dimexpr\!!widthb/\lastpage\relax
+ \bgroup
+ \advance\realpageno\minusone
+ \ifvoid\interactionbarbox
+ \bgroup
+ \processaction
+ [\@@ibstep]
+ [ \v!small=>\scratchdimen.25\emwidth,
+ \v!medium=>\scratchdimen.5\emwidth,
+ \v!big=>\scratchdimen\emwidth,
+ \s!unknown=>\scratchdimen\!!widtha]%
+ \ifdim\!!widtha<\scratchdimen\relax
+ \!!counta\numexpr\scratchdimen/\!!widtha\relax
+ \else
+ \!!counta\@@ibstep\relax
+ \fi
+ \!!widtha\!!counta\!!widtha
+ \setbox\scratchbox\hbox{\blackrule[\c!width=\!!widtha,\c!color=middlegray]}% color here, else no mkiv
+ \global\setbox\interactionbarbox\hbox to \!!widthb
+ {\hss
+ \dostepwiserecurse\plusone\lastpage\!!counta
+ {\gotorealpage\empty\empty\recurselevel{\copy\scratchbox}}%
+ \hss}%
+ \global\wd\interactionbarbox\zeropoint
+ \egroup
+ \fi
+ \egroup
+ \noindent
+ \strut
+ \hbox to \@@ibwidth
+ {\dontcomplain
+ \setupblackrules[\c!width=\emwidth]%
+ \dogotosomecontrastpage\??ib\blackrule\firstpage
+ \hss
+ \copy\interactionbarbox
+ \hbox to \!!widthb
+ {\ifdim\!!widtha<\emwidth
+ \!!widtha\emwidth
+ \fi
+ \setupblackrules[\c!width=\!!widtha]%
+ \ifnum\realpageno>\plusone
+ \!!counta\numexpr\realpageno-\plustwo\relax
+ \hskip\zeropoint\!!plus\!!counta \s!sp\relax % cm gives overflow
+ \dogotosomepage\??ib\blackrule\prevpage
+ \fi
+ \dogotosomecontrastpage\??ib{\blackrule[\c!width=.5em]}\realpageno
+ \ifnum\realpageno<\lastpage\relax
+ \dogotosomepage\??ib\blackrule\nextpage
+ \!!counta\numexpr\lastpage-\realpageno-\plusone\relax
+ \hskip\zeropoint\!!plus\!!counta \s!sp\relax % cm gives overflow
+ \fi}%
+ \hss
+ \dogotosomecontrastpage\??ib\blackrule\lastpage}%
+ \egroup
+ \fi}
+
+\def\interactionbarb
+ {\ifnum\lastpage>\firstpage\relax
+ \interactionbuttons[\v!firstpage,\v!previouspage,\v!nextpage,\v!lastpage]%
+ \fi}
+
+\def\interactionbarc
+ {\iflocation
+ \ifnum\lastpage>\plusone
+ \hbox to \@@ibwidth
+ {\setupblackrules[\c!height=\@@ibheight,\c!depth=\@@ibdepth]%
+ \scratchdimen\dimexpr(\@@ibwidth-4\emwidth)/\numexpr\lastpage+\minusone\relax\relax
+ \!!widtha\numexpr\realpageno+\minusone\relax\scratchdimen
+ \!!widthb\numexpr\lastpage-\realpageno\relax\scratchdimen
+ \startcolor[\locationcolor\@@ibcolor]%
+ \dogotosomepage\empty{\blackrule[\c!width=\emwidth]}\firstpage
+ \hss
+ \dogotosomepage\empty{\blackrule[\c!width=\!!widtha]}\prevpage
+ \color[\@@ibcontrastcolor]{\blackrule[\c!width=\emwidth]}%
+ \dogotosomepage\empty{\blackrule[\c!width=\!!widthb]}\nextpage
+ \hss
+ \dogotosomepage\empty{\blackrule[\c!width=\emwidth]}\lastpage
+ \stopcolor}%
+ \fi
+ \fi}
+
+\def\interactionbard
+ {\iflocation\ifshowingsubpage
+ \ifnum\nofsubpages>\plusone
+ \hbox \bgroup
+ \setinteractionparameter\c!width\!!zeropoint
+ \ifbarsymbol
+ \setupsymbolset[\@@iasymbolset]%
+ \def\dogotox##1%
+ {\hbox{\symbol[\ifcase##1 \v!previous\or\v!somewhere\or\v!next\fi]}}%
+ \else
+ \def\dogotox##1%
+ {\hbox{\vrule\!!height\@@ibheight\!!depth \@@ibdepth\!!width \@@ibwidth}}%
+ \fi
+ \dostepwiserecurse\plusone\nofsubpages\plusone
+ {\bgroup
+ \scratchcounter\numexpr\recurselevel+\firstsubpage+\minusone\relax
+ \ifnum\scratchcounter<\realpageno\relax
+ \dogotosomecontrastpage\??ib{\dogotox0}\scratchcounter
+ \else\ifnum\scratchcounter=\realpageno\relax
+ \dogotosomecontrastpage\??ib{\dogotox1}\scratchcounter
+ \else
+ \dogotosomecontrastpage\??ib{\dogotox2}\scratchcounter
+ \fi\fi
+ \egroup
+ \hskip\@@ibdistance}%
+ \unskip % not needed
+ \egroup
+ \fi
+ \fi\fi}
+
+\def\interactionbare% KAN WORDEN GECOMBINEERD MET D
+ {\iflocation\ifshowingsubpage
+ \ifnum\nofsubpages>\plusone
+ \bgroup
+ \!!widthb\dimexpr\nofsubpages\dimexpr\@@ibdistance\relax-\@@ibdistance\relax % (n-1)
+ \!!widtha\dimexpr(\@@ibwidth-\!!widthb)/\nofsubpages\relax
+ \ifdim\!!widtha<\@@ibdistance\relax
+ \interactionbarf
+ \else
+ \setinteractionparameter\c!width\!!zeropoint
+ \noindent
+ \hbox to \@@ibwidth
+ \bgroup
+ \ifbarsymbol
+ \setupsymbolset[\@@iasymbolset]%
+ \def\dogotox##1%
+ {\hbox{\symbol[\ifcase##1 \v!previous\or\v!somewhere\or\v!next\fi}}%
+ \else
+ \def\dogotox##1%
+ {\hbox{\vrule\!!height\@@ibheight\!!depth\@@ibdepth\!!width\!!widtha}}%
+ \fi
+ \dostepwiserecurse\plusone\nofsubpages\plusone
+ {\bgroup
+ \scratchcounter\numexpr\recurselevel+\firstsubpage+\minusone\relax
+ \ifnum\scratchcounter<\realpageno\relax
+ \dogotosomecontrastpage\??ib{\dogotox0}\scratchcounter
+ \else\ifnum\scratchcounter=\realpageno\relax
+ \dogotosomecontrastpage\??ib{\dogotox1}\scratchcounter
+ \else
+ \dogotosomecontrastpage\??ib{\dogotox2}\scratchcounter
+ \fi\fi
+ \egroup
+ \hss}%
+ \unskip
+ \egroup
+ \fi
+ \egroup
+ \fi
+ \fi\fi}
+
+\def\interactionbarf % !! KAN WORDEN GECOMBINEERD MET D !!
+ {\iflocation\ifshowingsubpage
+ \ifnum\nofsubpages>\plusone
+ \setinteractionparameter\c!width\!!zeropoint
+ \noindent
+ \hbox to \@@ibwidth
+ \bgroup
+ \!!countb\zerocount
+ \loop % todo: \doloop
+ \advance\!!countb \plusone
+ %\!!countc\nofsubpages \divide\!!countc \!!countb \advance\!!countc \plusone
+ \!!countc\numexpr(\nofsubpages/\!!countb)+\plusone\relax % rounding
+ \!!widthb\@@ibdistance
+ \multiply\!!widthb \!!countc
+ \advance\!!widthb -\@@ibdistance
+ \!!widtha\@@ibwidth
+ \advance\!!widtha -\!!widthb
+ \divide\!!widtha \!!countc
+ \ifdim\!!widtha<\@@ibdistance\relax
+ \repeat
+ \ifnum\!!countc>\plusone
+ % this is not that well tested
+ \advance\!!countc \minustwo
+ \!!widtha-\@@ibdistance
+ \!!widtha\!!countc\!!widtha
+ \advance\!!widtha \@@ibwidth
+ \advance\!!countc \plusone
+ \divide\!!widtha \!!countc
+ \fi
+ \ifbarsymbol
+ \setupsymbolset[\@@iasymbolset]%
+ \def\dogotox##1%
+ {\hbox{\symbol[\ifcase##1 \v!previous\or\v!somewhere\or\v!somewhere\or\v!somewhere\or\v!next\fi}}%
+ \else
+ \def\dogotox##1%
+ {\hbox
+ {\!!heighta\@@ibheight
+ \!!deptha\@@ibdepth
+ \ifcase##1\relax
+ \vrule\!!height \!!heighta\!!depth \!!deptha\!!width\!!widtha
+ \or
+ \vrule\!!height.5\!!heighta\!!depth.5\!!deptha\!!width\!!widtha
+ \or
+ \vrule\!!height \!!heighta\!!depth \!!deptha\!!width\!!widtha
+ \or
+ \vrule\!!height.5\!!heighta\!!depth.5\!!deptha\!!width\!!widtha
+ \or
+ \vrule\!!height \!!heighta\!!depth \!!deptha\!!width\!!widtha
+ \fi}}%
+ \fi
+ \!!countc\numexpr\realpageno-\plustwo\relax
+ \!!countd\numexpr\realpageno+\plustwo\relax
+ \ifnum\!!countc<\plusone \!!countc\plusone \fi
+ \!!countf\zerocount
+ \dostepwiserecurse\firstsubpage\lastsubpage\plusone
+ {\!!doneafalse
+ \advance\!!countf \plusone
+ \ifnum\recurselevel=\firstsubpage\relax \!!doneatrue \fi
+ \ifnum\recurselevel=\lastsubpage\relax \!!doneatrue \fi
+ \if!!donea
+ \ifnum\recurselevel<\realpageno
+ \dogotosomecontrastpage\??ib{\dogotox0}\recurselevel
+ \else\ifnum\recurselevel>\realpageno
+ \dogotosomecontrastpage\??ib{\dogotox2}\recurselevel
+ \else
+ \dogotosomecontrastpage\??ib{\dogotox4}\recurselevel
+ \fi\fi
+ \hss
+ \!!countf\zerocount
+ \else\ifnum\!!countf=\!!countb
+ \ifnum\recurselevel<\realpageno
+ \dogotosomecontrastpage\??ib{\dogotox1}\recurselevel
+ \else\ifnum\recurselevel>\realpageno
+ \dogotosomecontrastpage\??ib{\dogotox3}\recurselevel
+ \else
+ \dogotosomecontrastpage\??ib{\dogotox2}\recurselevel
+ \fi\fi
+ \hss
+ \!!countf\zerocount
+ \fi\fi}%
+ \unskip
+ \egroup
+ \fi
+ \fi\fi}
+
+\def\interactionbarg
+ {\ifnum\lastsubpage>\firstsubpage\relax
+ \interactionbuttons[\v!firstsubpage,\v!previoussubpage,\v!nextsubpage,\v!lastsubpage]%
+ \fi}
+
+\def\checkinteractionbar#1#2#3%
+ {\ifdim\@@ibwidth=\zeropoint\def\@@ibwidth{#1}\fi
+ \doifnothing\@@ibheight{\def\@@ibheight{#2}}%
+ \doifnothing\@@ibdepth{\def\@@ibdepth{#3}}}
+
+\def\complexinteractionbar[#1]%
+ {\doifelse{#1}\v!reset
+ {\global\setbox\interactionbarbox\emptybox}%
+ {\bgroup
+ \iflocation
+ \checksubpages % goes wrong / loads \numberofpages too
+ \getparameters[\??ib][#1]%
+ \doif\@@ibstate\v!start
+ {\startinteraction
+ \processaction % breedte defaults !
+ [\@@ibalternative]
+ [ c=>\checkinteractionbar{10em}\v!max \v!max,
+ d=>\checkinteractionbar{.5em}{.5em} \!!zeropoint,
+ e=>\checkinteractionbar{10em}{.5em} \!!zeropoint,
+ f=>\checkinteractionbar{10em}{.5em} \!!zeropoint,
+ \s!default=>\checkinteractionbar{10em}\v!broad\!!zeropoint,
+ \s!unknown=>\checkinteractionbar{10em}\v!broad\!!zeropoint]%
+ \doifelse\@@ibsymbol\v!yes
+ \barsymboltrue\barsymbolfalse
+ \getvalue{interactionbar\@@ibalternative}%
+ \stopinteraction}%
+ \fi
+ \egroup}}
+
+\definecomplexorsimpleempty\interactionbar
+
+\def\setupinteractionbar
+ {\dodoubleargument\getparameters[\??ib]}
+
+% Er wordt vooralsnog uitgegaan van een symmetrische
+% start-stop situatie.
+
+\def\c!profiel!! {profiel:} % brrr
+\def\c!versie!! {versie:}
+
+\def\dodefineprofile[#1][#2]%
+ {\iflocation
+ \def\dododefineprofile##1%
+ {\def\dodododefineprofile####1%
+ {\doifdefinedelse{\c!profiel!!####1}%
+ {\edef\!!stringa{\getvalue{\c!profiel!!####1}}%
+ \setevalue{\c!profiel!!####1}{\!!stringa,##1}}%
+ {\setevalue{\c!profiel!!####1}{##1}}}%
+ \processcommalist[#2]\dodododefineprofile}%
+ \processcommalist[#1]\dododefineprofile
+ \fi}
+
+\def\defineprofile%
+ {\dodoubleargument\dodefineprofile}
+
+% Als met \getpar wordt gewerkt, dan moet \next worden toegepast.
+
+% TZT initialisatie!
+
+\def\profilepage{}
+
+\let\dosetprofilepage\relax
+\let\dogetprofilepage\relax
+
+\def\processprofile#1[#2]%
+ {\iflocation
+ \par % needed for pdftex
+ \bgroup
+ \dosetprofilepage
+ \dogetprofilepage
+ \def\processoneprofile##1##2%
+ {\ExpandBothAfter\doifinsetelse{##2}{\processedprofiles}%
+ {\doifsomething{##1}{(##1)}}%
+ {\addtocommalist{##2}\processedprofiles
+ ##1\relax
+ \ifcase#1\relax
+ \dobeginofprofile{##2}\paperwidth\paperheight\profilepage
+ \else
+ \doendofprofile
+ \fi}}%
+ \let\processedprofiles\empty
+ \def\doprocessprofile##1%
+ {\doifelse{\@@pfoption}{\v!test}%
+ {\goodbreak\blank\nobreak\tt[\space
+ \ifcase#1\v!start\else\v!stop\fi profiel\space ##1:\space
+ \doifdefinedelse{\c!profiel!!##1}%
+ {\def\dodoprocessprofile####1%
+ {\processoneprofile
+ {\goto{####1}[\c!profiel!!####1]}%
+ {####1}%
+ \space}%
+ \processcommacommand
+ [\getvalue{\c!profiel!!##1}]\dodoprocessprofile}%
+ {- }%
+ ]\nobreak\blank}%
+ {\doifdefined{\c!profiel!!##1}%
+ {\def\dodoprocessprofile####1%
+ {\processoneprofile{}{####1}}%
+ \processcommacommand
+ [\getvalue{\c!profiel!!##1}]\dodoprocessprofile}}}%
+ \processcommalist[#2]\doprocessprofile
+ \egroup
+ \par % needed for pdftex
+ \fi}
+
+\def\startprofile[#1]%
+ {\iflocation
+ \bgroup
+ \addtocommalist{#1}\actualprofile
+ \def\stopprofile%
+ {\processprofile1[#1]%
+ \egroup}%
+ \def\next{\processprofile0[#1]}% % \DoAfterFi \processprofile0[#1]%
+ \else % ^^^^^^^^^^ will be obsolete
+ \let\next\relax % since ugly and never used
+ \fi
+ \next}
+
+\let\stopprofile\relax
+
+\def\dofollowprofile#1[#2]%
+ {\iflocation
+ \hbox
+ {\dohandlegoto
+ {\dolocationattributes\??ia\c!style\c!color{#1\presetgoto}}%
+ {\dostartgotoprofile\buttonwidth\buttonheight{#2}}%
+ {\dostopgotoprofile}}%
+ \else
+ {#1}%
+ \fi}
+
+\def\followprofile#1[#2]%
+ {\iflocation
+ \doif\@@pfoption\v!test{\pagereference[\c!profiel!!#2]}%
+ \dofollowprofile{#1}[#2]%
+ \fi}
+
+\def\setupprofiles%
+ {\dodoubleargument\getparameters[\??pf]}
+
+% Als er nog geen tekst op de pagina staat, dan heeft het
+% profiel betrekking op het bovenstaande, dus soms een vorige
+% pagina! Vreemd, omdat PDF paginagewijs werkt. Gelukkig
+% biedt /page een oplossing. Echter: expansie van een
+% \special kan niet worden uitgesteld, zodat alleen een
+% two-pass een oplossing vormt. Het onderstaande kan komen
+% te vervallen als Acrobat dit ondervangt. Het scheelt een
+% pass en een lijst.
+%
+% Er kunnen eventueel twee lijsten worden gebruikt. Een voor
+% het begin (start) en een voor het eind (stop). Nu staat
+% alles in een lijst.
+
+\definetwopasslist\s!profile
+
+\newcounter\currentprofile
+
+\def\dosetprofilepage%
+ {\doglobal\increment\currentprofile
+ \lazysavetwopassdata{\s!profile}{\currentprofile}{\noexpand\realfolio}}
+
+\def\dogetprofilepage%
+ {\gettwopassdata{\s!profile}%
+ \let\profilepage=\twopassdata}
+
+% is this stuff used at all
+
+\newcounter\versionlevel
+\newcounter\versionorder
+
+\newif\ifrecentversion
+
+\let\oldatcharacter=@
+
+\def\minimumversion{0}
+\def\actualversion{0}
+
+\def\dosetupversions[#1]%
+ {\getparameters[\??ve][#1]
+ \stripcharacter.\from\@@venumber\to\minimumversion}
+
+\def\setupversions
+ {\dosingleargument\dosetupversions}
+
+\definetwopasslist\s!versionbegin
+\definetwopasslist\s!versionend
+
+\let\actualprofile\empty
+
+\def\doresetpageversion
+ {\lazysavetwopassdata{\s!versionend}{\versionorder}{\noexpand\realfolio}}
+
+\def\dosetpageversion#1%
+ {\recentversiontrue
+ \doglobal\increment\versionorder\relax
+ \lazysavetwopassdata{\s!versionbegin}{\versionorder}{\noexpand\realfolio}%
+ \let\resetpageversion\doresetpageversion}
+
+\def\recentcontributions{}
+
+\def\checkrecentcontributions%
+ {\gettwopassdata{\s!versionbegin}%
+ \iftwopassdatafound
+ \!!counta\twopassdata\relax
+ \gettwopassdata{\s!versionend}%
+ \iftwopassdatafound
+ \!!countb\twopassdata\relax
+ \doglobal\increment\versionorder\relax
+ \savetwopassdata{\s!versionbegin}{\versionorder}{\the\!!counta}%
+ \savetwopassdata{\s!versionend }{\versionorder}{\the\!!countb}%
+ \dostepwiserecurse\!!counta\!!countb\plusone
+ {\@EA\doglobal\@EA\addtocommalist\@EA{\recurselevel}{\recentcontributions}}%
+ \let\next\checkrecentcontributions
+ \else
+ \let\next\relax
+ \fi
+ \else
+ \let\next\relax
+ \fi
+ \next}
+
+\def\docheckpageversion
+ {\ExpandBothAfter\doifinsetelse{\realfolio}{\recentcontributions}
+ {\pageselectedtrue}%
+ {\pageselectedfalse}}
+
+\let\setpageversion \gobbleoneargument
+\let\resetpageversion \relax
+\let\checkpageversion \relax
+
+\def\complexstartversion[#1]%
+ {\bgroup
+ \doifelsenothing\actualprofile
+ {\startprofile[#1]}%
+ {\startprofile[#1,\actualprofile]}%
+ \def\docomplexstartversie##1%
+ {\stripcharacter.\from##1\to\actualversion
+ \ifnum\versionlevel>\zerocount\relax
+ \ifnum\actualversion=\zerocount
+ \setpageversion\actualversion % unknown version
+ \else
+ \ifnum\actualversion<\minimumversion\relax
+ \relax % old version
+ \else
+ \setpageversion\actualversion % new version
+ \fi
+ \fi
+ \fi}%
+ \doglobal\increment\versionlevel\relax
+ \doifelsenothing{#1}
+ {\docomplexstartversie{0}}%
+ {\processcommalist[#1]\docomplexstartversie}}
+
+\definecomplexorsimpleempty\startversion
+
+\def\stopversion
+ {\stopprofile
+ \doglobal\decrement\versionlevel
+ \ifnum\versionlevel<\zerocount
+ \showmessage\m!versions1\empty
+ \else
+ \resetpageversion
+ \egroup
+ \fi}
+
+\def\markversion
+ {\showmessage\m!versions2\empty
+ \let\setpageversion\dosetpageversion
+ \let\resetpageversion\relax
+ \let\checkpageversion\relax}
+
+\def\selectversion
+ {\checkrecentcontributions
+ \showmessage\m!versions3\recentcontributions
+ \let\setpageversio\gobbleoneargument
+ \let\resetpageversion\relax
+ \let\checkpageversion\docheckpageversion}
+
+\def\dodefineversion[#1][#2]%
+ {\setvalue{\c!versie!!#1}{#2}%
+ \defineprofile[#1][#2]}
+
+\def\defineversion
+ {\dodoubleargument\dodefineversion}
+
+\def\followversion
+ {\followprofile}
+
+\def\followprofileversion#1[#2][#3]%
+ {\def\docommand##1%
+ {\defineprofile[#2#3][##1]}%
+ \processcommacommand[\getvalue{\c!versie!!#3}]\docommand
+ \followprofile#1[#2#3]}
+
+\newcounter\currentpagetransition
+
+\newif\ifrandomtransitions
+
+\def\setuppagetransitions%
+ {\dosingleempty\dosetuppagetransitions}
+
+\def\dosetuppagetransitions[#1]%
+ {\doifelsenothing{#1}
+ {\doifnot\@@scdelay\v!none
+ {\let\setpagetransition\setsomepagedelay}}
+ {\doifelse{#1}\v!start
+ {\doifnot\@@scdelay\v!none
+ {\let\setpagetransition\setsomepagedelay}}
+ {\doglobal\newcounter\currentpagetransition
+ \doifinsetelse{#1}{\v!reset,\v!stop}
+ {\let\setpagetransition\relax}
+ {\let\setpagetransition\setsomepagetransition
+ \doifinsetelse\v!random{#1}
+ {\randomtransitionstrue}{\randomtransitionsfalse}%
+ \edef\userpagetransitions{#1}%
+ \@EA\removefromcommalist\@EA{\v!random}\userpagetransitions
+ \ifx\userpagetransitions\empty
+ \let\userpagetransitions\pagetransitions
+ \fi}}}}
+
+\def\setsomepagedelay
+ {\expanded{\dosetpagetransition{0}{\@@scdelay}}}
+
+\def\setsomepagetransition
+ {\iflocation
+ \ifrandomtransitions
+ \expanded{\getcommalistsize[\userpagetransitions]}%
+ \getrandomnumber\currentpagetransition1\commalistsize
+ \else
+ \doglobal\increment\currentpagetransition
+ \fi
+ \expanded{\getfromcommalist[\userpagetransitions][\currentpagetransition]}%
+ \doifnumberelse\commalistelement
+ {\expanded{\getfromcommalist[\pagetransitions][\commalistelement]}}
+ {}%
+ \ifx\commalistelement\empty
+ \doglobal\newcounter\currentpagetransition
+ \setsomepagetransition
+ \else
+ \doifelse\@@scdelay\v!none
+ {\expanded{\dosetpagetransition{\commalistelement}{0}}}
+ {\expanded{\dosetpagetransition{\commalistelement}{\@@scdelay}}}%
+ \fi
+ \fi}
+
+\prependtoks \setpagetransition \to \everyshipout
+
+% temporary here
+
+%D \startbuffer
+%D \dorecurse{10}
+%D {\horizontalpositionbar
+%D \pos\recurselevel \min1 \max10
+%D \token\framed{\recurselevel}%
+%D \\}
+%D
+%D \hbox to 15em
+%D {\hss
+%D \dorecurse{10}
+%D {\verticalpositionbar\pos\recurselevel\min1\max10\token\blackrule\\
+%D \hss}}
+%D \stopbuffer
+
+\def\horizontalpositionbar\pos#1\min#2\max#3\token#4\\%
+ {\hbox to \hsize
+ {\hskip\zeropoint\!!plus #1\!!fill
+ \hskip\zeropoint\!!plus-#2\!!fill
+ #4\relax
+ \hskip\zeropoint\!!plus #3\!!fill
+ \hskip\zeropoint\!!plus-#1\!!fill}}
+
+\def\verticalpositionbar\pos#1\min#2\max#3\token#4\\%
+ {\vbox to \vsize
+ {\vskip\zeropoint\!!plus #1\!!fill
+ \vskip\zeropoint\!!plus-#2\!!fill
+ \hbox{#4}\relax
+ \vskip\zeropoint\!!plus #3\!!fill
+ \vskip\zeropoint\!!plus-#1\!!fill}}
+
+\def\horizontalgrowingbar\pos#1\min#2\max#3\height#4\depth#5\\%
+ {\hbox to \hsize
+ {\scratchcounter#1%
+ \advance\scratchcounter -#2%
+ \advance\scratchcounter \plusone
+ \leaders\vrule\hskip\zeropoint\!!plus \scratchcounter\!!fill
+ \vrule\!!width\zeropoint\!!height#4\!!depth#5%
+ \hskip\zeropoint\!!plus #3\!!fill
+ \hskip\zeropoint\!!plus-#1\!!fill}}
+
+\def\verticalgrowingbar\pos#1\min#2\max#3\width#4\\%
+ {\vbox to \vsize
+ {\scratchcounter#1%
+ \advance\scratchcounter -#2%
+ \advance\scratchcounter \plusone
+ \leaders\hrule\vskip\zeropoint\!!plus\scratchcounter\!!fill
+ \hrule\!!width#4\!!height\zeropoint\!!depth\zeropoint
+ \vskip\zeropoint\!!plus #3\!!fill
+ \vskip\zeropoint\!!plus-#1\!!fill}}
+
+\newbox\commentbox
+
+\def\doflushcommentanchors
+ {\let\next\relax % new
+ \processaction
+ [\@@cclocation]
+ [% \v!text=>\let\next\relax, % new
+ \v!inmargin=>\let\next\inmargin, % brr not the same as inleft|rightmargin
+ \v!leftedge=>\let\next\inleftedge,
+ \v!rightedge=>\let\next\inrightedge,
+ \v!leftmargin=>\let\next\inleftmargin,
+ \v!rightmargin=>\let\next\inrightmargin]%
+ \next{\hbox{\raise\strutht\box\commentbox}}}
+
+\def\flushcommentanchors % in everypar so indirect
+ {\ifvoid\commentbox\else \doflushcommentanchors \fi}
+
+\def\setupcomment
+ {\dodoubleargument\getparameters[\??cc]}
+
+\setvalue{\e!start\v!comment}% the dummy triple gobbles trailing spaces
+ {\dotripleempty\dostartcommentaar}
+
+\def\comment
+ {\dodoubleempty\docomment}
+
+\def\dodocomment#1%
+ {\!!widtha\@@ccwidth
+ \!!heighta\@@ccheight
+ \doifelse\@@ccoption\v!max
+ {\let\@@ccopen \!!plusone}{\let\@@ccopen \!!zerocount}%
+ \doifelse\@@ccoption\v!buffer
+ {\let\@@cccollect\!!plusone}{\let\@@cccollect\!!zerocount}%
+ \preparecommentvariables
+ \doinsertcomment
+ \@@cctitle\!!widtha\!!heighta
+ \@@cccolor\@@ccopen\@@ccsymbol
+ \@@cccollect{#1}}
+
+\def\preparecommentvariables % more will move here as with fields
+ {\let\@@DriverCommentLayer\@@cctextlayer}
+
+\def\dopreparecommentaar#1#2%
+ {\doifassignmentelse{#1}
+ {\getparameters[\??cc][#1]}
+ {\getparameters[\??cc][\c!title=#1,#2]}%
+ \obeylines
+ \doif\@@ccspace\v!yes\obeyspaces}
+
+\def\dostartcommentaar[#1][#2][#3]%
+ {\bgroup
+ \doifelse\@@ccstate\v!start
+ {\dopreparecommentaar{#1}{#2}%
+ \long\def\docommand##1%
+ {\global\setbox\commentbox\frozenhbox
+ {\hbox to \zeropoint
+ {\struttedbox{\tbox{\dodocomment{##1}}}\hss}%
+ \hskip\ifvoid\commentbox\@@ccmargin\else\@@ccdistance\fi
+ \box\commentbox}%
+ \egroup}}%
+ {\long\def\docommand##1%
+ {\egroup}}%
+ \grabuntil{\e!stop\v!comment}\docommand}
+
+\letvalue{\e!stop\v!comment}\relax % handy for \expanded{...}
+
+\def\docomment[#1][#2]#3%
+ {\doif\@@ccstate\v!start
+ {\hbox to \zeropoint
+ {\dopreparecommentaar{#1}{#2}%
+ \hskip-\@@ccmargin
+ \struttedbox{\tbox{\dodocomment{#3}}\hss}}}%
+ \ignorespaces}
+
+% \startcomment
+% hello beautiful\\world
+% \stopcomment
+%
+% \startcomment[hello]
+% hello << \'e\'erste >>
+% beautiful
+% world
+% \stopcomment
+%
+% \startcomment[hello][color=green,width=4cm,height=3cm]
+% hello \leftguillemot\ \'e\'erste \rightguillemot\
+% beautiful
+% world
+% \stopcommentaar
+%
+% \startcomment[hello][color=green,width=4cm,height=3cm]
+% hello \leftguillemot\ \'e\'erste \rightguillemot\ test
+%
+% beautiful
+%
+% world
+% \stopcomment
+%
+% \startcomment[symbol=Balloon]
+% Do we want this kind of rubish? And, why isn't this and
+% some more features related to text annotations so poorly
+% (actually not) documented? Anyhow, by providing this
+% functionality we demonstrate that \pdfTeX\ can do it. By
+% the way, it's funny that when in Acrobat we scale up the
+% text, the symbols scale down.
+% \stopcomment
+
+% \definesymbol [comment-normal][{\externalfigure[cow.pdf]}]
+% \definesymbol [comment-down] [{\externalfigure[cow.pdf]}]
+%
+% \def\CowSymbol#1#2%
+% {\scale
+% [\c!height=#1]
+% {\startMPcode
+% loadfigure "koe.mp" number 1 ;
+% refill currentpicture withcolor #2 ;
+% \stopMPcode}}
+%
+% \definesymbol [comment-normal]
+% [\CowSymbol{4ex}{red}]
+%
+% \definesymbol [comment-down]
+% [\CowSymbol{4ex}{green}]
+%
+% \setupcomment
+% [\c!symbol={comment-normal,comment-down},
+% \c!option=\v!buffer]
+%
+% \setupfootertexts[\placecomments]
+
+\def\placecomments
+ {\doflushcomments}
+
+% \setupinteraction[state=start]
+%
+% \useattachment[test.tex]
+% \useattachment[whatever][test.tex]
+% \useattachment[whatever][newname][test.tex]
+% \useattachment[whatever][title][newname][test.tex]
+%
+% % \setupattachments[\c!symbol={symbol-normal,symbol-down}]
+%
+% \starttext \attachment[whatever] \stoptext
+
+
+\def\useattachment
+ {\doquadrupleempty\douseattachment}
+
+\def\douseattachment[#1][#2][#3][#4]% tag title newname filename
+ {\iffourthargument
+ \setgvalue{\??at:#1}{{#2}{#3}{#4}}% tooltip kind of case
+ \else\ifthirdargument
+ \setgvalue{\??at:#1}{{#2}{#2}{#3}}% full path case
+ \else\ifsecondargument
+ \setgvalue{\??at:#1}{{#2}{#2}{#2}}% obvious case
+ \else
+ \setgvalue{\??at:#1}{{#1}{#1}{#1}}% worst case
+ \fi\fi\fi}
+
+\let\attachmenttitle\empty
+\let\attachmentname \empty
+\let\attachmentfile \empty
+
+\def\getattachmentdata[#1]%
+ {\edef\attachmenttitle{\filterfromvalue{\??at:#1}31}% description
+ \edef\attachmentname {\filterfromvalue{\??at:#1}32}% new name
+ \edef\attachmentfile {\filterfromvalue{\??at:#1}33}% original
+ \expandafter\splitstring\attachmentname\at.\to\!!stringa\and\!!stringb
+ \ifx\!!stringb\empty % no suffix, so we need to inherit it
+ \expandafter\splitstring\attachmentfile\at.\to\!!stringc\and\!!stringd
+ \edef\attachmentname{\attachmentname.\!!stringd}%
+ \fi}
+
+\def\attachment
+ {\dodoubleempty\doattachment}
+
+\def\doattachment[#1][#2]% currently title equals newname
+ {\iflocation
+ \ifsecondargument
+ \doifundefined{\??at:#2}
+ {\showmessage\m!interactions6{#2}%
+ \useattachment[#2]}%
+ \doif\@@atstate\v!start
+ {\bgroup
+ \getattachmentdata[#2]%
+ \doiffileelse\attachmentfile
+ {\setupattachments[#1]%
+ \presetattachmentvariables
+\struttedbox{\tbox{%
+ \doattachfile
+ \attachmenttitle
+ {1em}\strutheight\strutdepth\@@atcolor\@@atsymbol
+ \attachmentname
+ \attachmentfile}%
+}}%
+ {\showmessage\m!interactions5\attachmentfile}%
+ \egroup}%
+ \else\iffirstargument
+ \attachment[][#1]%
+ \fi\fi
+ \fi}
+
+\def\presetattachmentvariables
+ {\let\@@DriverAttachmentLayer\@@attextlayer}
+
+\def\setupattachments
+ {\dodoubleempty\getparameters[\??at]}
+
+\setupattachments
+ [\c!state=\v!start,
+ \c!color=\@@iacolor,
+ \c!textlayer=,
+ \c!symbol=]
+
+% jammer, tussen/midden had erin gemoeten; \c!commando toevoegen
+
+\def\registermenucommand#1%
+ {{\textonly\noindent#1\space}} % no math switching
+
+\def\doregistermenubuttons[#1][#2]% [menu id] [register]
+ {\bgroup
+ \ifsecondargument
+ \setupinteractionmenu
+ [#1][\c!unknownreference=\v!yes,\c!samepage=\v!yes]%
+ \def\docommand##1%
+ {\registermenucommand{\menubutton[#1]{##1}[#2:##1]}}%
+ \else
+ \def\docommand##1%
+ {\registermenucommand
+ {\button
+ [\c!unknownreference=\v!yes,\c!samepage=\v!yes]
+ {##1}[#1:##1]}}%
+ \fi
+ \handletokens abcdefghijklmnopqrstuvwxyz\with\docommand % moet anders
+ \egroup}
+
+\def\registermenubuttons
+ {\dodoubleempty\doregistermenubuttons}
+
+% It took quite a while to figure this out (using the preliminary 1.5
+% spec). There are still a lot of things to be implemented. This is
+% the third alternative.
+
+% todo: multiple instances, dus indirect
+
+\let\currentrendering\empty
+
+\definereference[StartCurrentRendering] [\v!StartRendering {\currentrendering}]
+\definereference[StopCurrentRendering] [\v!StopRendering {\currentrendering}]
+\definereference[PauseCurrentRendering] [\v!PauseRendering {\currentrendering}]
+\definereference[ResumeCurrentRendering][\v!ResumeRendering{\currentrendering}]
+
+\newcounter\nofexternalrenderings
+
+\def\useexternalrendering{\doquadrupleempty\douseexternalrendering}
+\def\setinternalrendering{\dodoubleempty \dosetinternalrendering}
+
+\def\douseexternalrendering[#1][#2][#3][#4]% tag mime file options
+ {\setgvalue{\??rd:#1}{\plusone{#1}{#2}{#3}{#4}}}
+
+\def\dosetinternalrendering[#1][#2]% tag options {content}
+ {\bgroup
+ \dowithnextbox
+ {\setgvalue{\??rd:#1}{\plustwo{#1}{IRO}{#1}{#2}}%
+ \let\objectoffset\zeropoint
+ \setobject{IRO}{#1}\hbox{\box\nextbox}%
+ \egroup}%
+ \hbox}
+
+\def\checkrendering#1% let's hope that \next is not used
+ {\iflocation
+ \doifsomething{#1}%
+ {\doifdefined{\??rd:#1}%
+ {\expanded{\getvalue{\??rd::\number\renderingtype{#1}}%
+ {\filterfromvalue{\??rd:#1}52}{\filterfromvalue{\??rd:#1}53}%
+ {\filterfromvalue{\??rd:#1}54}{\filterfromvalue{\??rd:#1}55}}}}%
+ \fi}
+
+\setvalue{\??rd::1}{\doinsertrendering}
+\setvalue{\??rd::2}{\doinsertrenderingobject}
+
+\def\renderingtype #1{\filterfromvalue{\??rd:#1}51}
+\def\renderingoptions#1{\filterfromvalue{\??rd:#1}55}
+
+\setexecutecommandcheck {startrendering} \checkrendering
+\setexecutecommandcheck {stoprendering} \checkrendering
+\setexecutecommandcheck {pauserendering} \checkrendering
+\setexecutecommandcheck {resumerendering} \checkrendering
+
+% by using a nice trick (used in other places of context as well) we
+% can easily overload the default size to match the opbject size
+
+\def\renderingwidth {8cm}
+\def\renderingheight{6cm}
+
+\def\definerenderingwindow
+ {\dodoubleempty\dodefinerenderingwindow}
+
+\def\dodefinerenderingwindow[#1][#2]%
+ {\presetlocalframed[\??rw#1]%
+ \getparameters%
+ [\??rw#1]%
+ [\c!openpageaction=,\c!closepageaction=,%
+ \c!width=\renderingwidth,\c!height=\renderingheight,%
+ #2]}
+
+\def\setuprenderingwindow
+ {\dodoubleargument\dosetuprenderingwindow}
+
+\def\dosetuprenderingwindow[#1]%
+ {\getparameters[\??rw#1]}
+
+\def\placerenderingwindow
+ {\dodoubleempty\doplacerenderingwindow}
+
+\def\doplacerenderingwindow[#1][#2]%
+ {\bgroup
+ \edef\currentrendering{\ifsecondargument#2\else#1\fi}%
+ \ifcase\renderingtype\currentrendering\or
+ % a file
+ \or
+ % an object
+ \getobjectdimensions{IRO}\currentrendering
+ \scratchdimen\objectheight
+ \advance\scratchdimen\objectdepth
+ \edef\renderingheight{\the\scratchdimen}%
+ \edef\renderingwidth{\objectwidth}%
+ \fi
+ % create fall back if needed
+ \doifdefinedelse{\??rw#1\c!width}
+ {\def\currentrenderingwindow{#1}}
+ {\let\currentrenderingwindow\s!default
+ \definerenderingwindow[\currentrenderingwindow]}%
+ \checkrendering\currentrendering
+ \handlereferenceactions{\getvalue{\??rw\currentrenderingwindow\c!openpageaction }}\dosetuprenderingopenpageaction
+ \handlereferenceactions{\getvalue{\??rw\currentrenderingwindow\c!closepageaction}}\dosetuprenderingclosepageaction
+ \localframed
+ [\??rw\currentrenderingwindow][\c!offset=\v!overlay]%
+ {\expanded{\doinsertrenderingwindow
+ \noexpand\currentrendering\hsize\vsize{\renderingoptions\currentrendering}}}%
+ \egroup}
+
+% todo:
+%
+% \setinternalrendering[example-1][options]{}
+
+% test file:
+%
+% \definerenderingwindow
+% [example]
+% [width=320pt,height=150pt,frame=off,
+% background=color,backgroundcolor=gray,
+% openpageaction=StartCurrentRendering,
+% closepageaction=NextPage]% StopCurrentRendering]
+%
+% \useexternalrendering[example-1][audio/mpeg] [eldorado.mp3]
+% \useexternalrendering[example-2][audio/mpeg] [myst-12.mp3]
+% \useexternalrendering[example-3][application/x-shockwave-flash][http://localhost/mb.swf] [auto]
+% \useexternalrendering[example-4][application/x-shockwave-flash][celebration.swf]
+% \useexternalrendering[example-5][video/quicktime] [p1000726.mov]
+% \useexternalrendering[example-6][application/smil] [quadratic_map.smi]
+%
+% \def\renderingmenu[#1]%
+% {\hbox
+% {\setupbuttons[width=2.5em]%
+% \button{\symbol[StartRendering]} [StartRendering{#1}]\enspace
+% \button{\symbol[StopRendering]} [StopRendering{#1}]\enspace
+% \button{\symbol[PauseRendering]} [PauseRendering{#1}]\enspace
+% \button{\symbol[ResumeRendering]}[ResumeRendering{#1}]}}
+%
+% \renderingmenu[example-1]\blank
+% \renderingmenu[example-2]\blank
+% \renderingmenu[example-3]\blank
+% \renderingmenu[example-4] \placefigure{A ShockWave}{\placerenderingwindow[example][example-4]} \page
+% \renderingmenu[example-5] \placefigure{A Movie}{\placerenderingwindow[example][example-5]} \page
+% \renderingmenu[example-6] \placefigure{A Smile}{\placerenderingwindow[example][example-6]}
+
+\stelkoppelingenin
+ [\c!distance=.25em,
+ \c!width=\v!fit,
+ \c!location=\v!low,
+ \c!color=\@@iacolor,
+ \c!frame=\v!off,
+ \c!background=,
+ \c!backgroundscreen=\@@rsscreen,
+ \c!backgroundcolor=]
+
+\defineinteractionmenu
+ [\v!right]
+ [\v!right]
+ [\c!before=,
+ \c!after=\vfil,
+ \c!inbetween=\blank,
+ \c!distance=\bodyfontsize, % 12pt
+ \c!left=\hss,
+ \c!right=\hss,
+ \c!width=\rightedgewidth,
+ \c!height=\v!broad]
+
+\defineinteractionmenu
+ [\v!left]
+ [\v!left]
+ [\c!before=,
+ \c!after=\vfil,
+ \c!inbetween=\blank,
+ \c!distance=\bodyfontsize, % 12pt
+ \c!left=\hss,
+ \c!right=\hss,
+ \c!width=\leftedgewidth,
+ \c!height=\v!broad]
+
+\defineinteractionmenu
+ [\v!bottom]
+ [\v!bottom]
+ [\c!before=\vss,
+ \c!after=\vss,
+ \c!middle=\hfil,
+ \c!distance=\bodyfontsize, % 12pt
+ \c!width=\v!fit,
+ \c!height=\v!broad]
+
+\defineinteractionmenu
+ [\v!top]
+ [\v!top]
+ [\c!before=\vss,
+ \c!after=\vss,
+ \c!middle=\hfil,
+ \c!distance=\bodyfontsize, % 12pt
+ \c!width=\v!fit,
+ \c!height=\v!broad]
+
+\setupinteractionmenu
+ [\v!left,\v!right,\v!top,\v!bottom]
+ [\c!offset=.25em,
+ \c!position=\v!no,
+ \c!frame=\v!on,
+ \c!background=,
+ \c!backgroundcolor=,
+ \c!backgroundscreen=\@@rsscreen,
+ \c!style=\@@iastyle,
+ \c!color=\@@iacolor,
+ \c!contrastcolor=\@@iacontrastcolor,
+ \c!state=\v!start,
+ \c!samepage=\v!yes,
+ \c!unknownreference=\v!empty,
+ \c!topoffset=\!!zeropoint,
+ \c!bottomoffset=\!!zeropoint,
+ \c!leftoffset=\!!zeropoint,
+ \c!rightoffset=\!!zeropoint]
+
+\def\placeleftedgetextblock % Is \hss/\hsize really needed here?
+ {\hbox to \leftedgewidth % (check outer level and settings)
+ {\hsize\leftedgewidth\hss\interactionmenus[\v!left]}}
+
+\def\placerightedgetextblock % Is \hss/\hsize really needed here?
+ {\hbox to \rightedgewidth % (check outer level and settings)
+ {\hsize\rightedgewidth\interactionmenus[\v!right]\hss}}
+
+\def\placetoptextblock
+ {\vbox to \topheight
+ {\vsize\topheight
+ \csname\??tk\v!top\c!before\endcsname
+ \interactionmenus[\v!top]%
+ \csname\??tk\v!top\c!after\endcsname
+ \kern\zeropoint}}
+
+\def\placebottomtextblock
+ {\vbox to \bottomheight
+ {\vsize\bottomheight
+ \csname\??tk\v!bottom\c!before\endcsname
+ \interactionmenus[\v!bottom]%
+ \csname\??tk\v!bottom\c!after\endcsname
+ \kern\zeropoint}}
+
+\ifx\leftedgetextcontent\undefined \else
+
+ \appendtoks \placeleftedgetextblock \hskip-\leftedgewidth \to \leftedgetextcontent
+ \appendtoks \placerightedgetextblock \hskip-\rightedgewidth \to \rightedgetextcontent
+ \appendtoks \placetoptextblock \vskip-\topheight \to \toptextcontent
+ \appendtoks \placebottomtextblock \vskip-\bottomheight \to \bottomtextcontent
+
+\fi
+
+\setupinteractionscreen
+ [\c!width=\printpaperwidth,
+ \c!height=\printpaperheight,
+ \c!horoffset=\!!zeropoint,
+ \c!veroffset=\!!zeropoint,
+ \c!backspace=\backspace,
+ \c!topspace=\topspace,
+ \c!option=\v!min,
+ \c!delay=\v!none]
+
+\setupbuttons
+ [\c!state=\v!start,
+ \c!width=\v!fit,
+ \c!height=\v!broad,
+ \c!offset=0.25em,
+ \c!frame=\v!on,
+ \c!background=,
+ \c!backgroundscreen=\@@rsscreen,
+ \c!backgroundcolor=,
+ \c!style=\@@iastyle,
+ \c!color=\@@iacolor,
+ \c!contrastcolor=\@@iacontrastcolor,
+ \c!samepage=\v!yes,
+ \c!unknownreference=\v!yes]
+
+\setupinteractionbar
+ [\c!state=\v!start,
+ \c!alternative=a,
+ \c!symbol=\v!no,
+ \c!width=\rightedgewidth,
+ \c!height=, % these are taken care
+ \c!depth=, % of at calling time
+ \c!distance=.5em, % beter relateren aan breedte
+ \c!step=1,
+ \c!color=\@@iacolor,
+ \c!contrastcolor=\@@iacontrastcolor,
+ \c!frame=\v!on,
+ \c!background=,
+ \c!backgroundscreen=\@@rsscreen,
+ \c!backgroundcolor=,
+ \c!samepage=\v!yes,
+ \c!unknownreference=\v!yes]
+
+\setupsynchronizationbar
+ [\c!alternative=\v!page,
+ \c!width=\rightedgewidth,
+ \c!style=\@@iastyle,
+ \c!color=\@@iacolor,
+ \c!background=,
+ \c!backgroundscreen=\@@rsscreen,
+ \c!backgroundcolor=]
+
+\setupsynchronization
+ [\c!state=\v!stop]
+
+\setupprofiles
+ [\c!option=]
+
+\setuppagetransitions
+ [\v!reset]
+
+\setupcomment
+ [\c!state=\v!start,
+ \c!margin=2.5em,
+ \c!distance=1em,
+ \c!width=.3\textwidth,
+ \c!height=.2\textheight,
+ \c!color=\@@iacolor,
+ \c!title=,
+ \c!space=\v!no,
+ \c!symbol=\v!normal,
+ \c!location=\v!inmargin,
+ \c!option=,
+ \c!textlayer=]
+
+\setupversions % beware, @ is made active here,
+ [\c!number=1, % therefore we set this one at the end
+ \c!style=\ss,
+ \c!color=]
+
+\protect \endinput
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