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|
%D \module
%D [ file=core-ref,
%D version=1998.01.15,
%D title=\CONTEXT\ Core Macros,
%D subtitle=Cross Referencing,
%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.
\writestatus{loading}{Context Core Macros / Cross Referencing}
% todo : unknown/illegal reference no arg
% todo : +n pages check on 'samepage' (contrastcolor)
% Makes more sense to build action data first, especially now
% openaction etc are supported.
%
% \definespecial\doexecuteactionchain w h
% \definespecial\dosetgotolocation
% \definespecial\dosetexecuteJScode
% ...
%
% complication: what when direct? Two calls!
% I considered to change / simplify
%
% rt!page -> \definereference
% rt!list -> \definereference
% rt!exec -> \definereference
%
% but for the moment will not do so, if only because
% the current implementation permits us to determine
% the page state and is also more efficient
% the code is rather fuzzy (and will be redone some day); this is
% due to the chaining (collect secondary and then hook that into
% the primary etc
\unprotect
\startmessages dutch library: references
title: verwijzingen
1: onbekende verwijzing --
2: dubbele verwijzing -- op pagina --
3: type verwijzing -- onbekend
4: verboden verwijzing --
21: document -- geladen
22: document -- is niet interactief
23: onduidelijke verwijzing -- (prefix=--)
\stopmessages
\startmessages english library: references
title: references
1: unknown reference --
2: duplicate reference -- on page --
3: unknown reference type --
4: illegal reference --
21: document -- loaded
22: document -- is not interactive
23: obscure reference -- (prefix=--)
\stopmessages
\startmessages german library: references
title: referenzen
1: unbekannte Referenz --
2: doppelte Referenz -- auf Seite --
3: unbekannte Referenz Typ --
4: illegale Referenz --
21: Dokument -- geladen
22: Dokument -- ist nicht aktiv
23: Obskure Referenz -- (Prefix=--)
\stopmessages
\startmessages czech library: references
title: reference
1: neznama reference --
2: duplicitni reference -- na strane --
3: neznamy typ reference --
4: nedovolena reference --
21: dokument -- nacten
22: dokument -- neni interaktivni
23: obskurni (nejasna) reference -- (prefix=--)
\stopmessages
\startmessages italian library: references
title: riferimenti
1: riferimento sconosciuto --
2: riferimento duplicato -- a pagina --
3: riferimento di tipo sconosciuto --
4: riferimento illecito --
21: documento -- caricato
22: il documento -- non è interattivo
23: riferimento ambiguo -- (prefisso=--)
\stopmessages
\startmessages norwegian library: references
title: referanser
1: ukjent referanse --
2: duplikat referanse -- på side --
3: ukjent referansetype --
4: ulovlig referanse --
21: dokument -- er lest inn
22: dokument -- er ikke interaktivt
23: obskur referanse -- (Prefix=--)
\stopmessages
\startmessages romanian library: references
title: referinte
1: referinta necunoscuta --
2: referinta duplicat -- la pagina --
3: tip necunoscut de referinta --
4: referinta eronata --
21: documentul -- este incarcat
22: documentul -- nu este interactiv
23: referinta obscura -- (prefix=--)
\stopmessages
%D This module deals with referencing. In \CONTEXT\ referencing
%D is one of the core features, although at a first glance
%D probably nobody will notice. This is good, because
%D referencing should be as hidden as possible.
%D
%D In paper documents, referencing comes down to cross
%D referencing, but in their interactive counterparts, is also
%D involves navigation. Many features implemented here are
%D therefore closely related to navigation.
%D
%D Many \CONTEXT\ commands can optionally be fed with a
%D reference. Such a reference, when called upon, returns the
%D number of a figure, table, chapter etc, a piece of text, or
%D a pagenumber.
%D
%D There are three ways of defining a reference:
%D
%D \starttyping
%D \pagereference[here]
%D \textreference[here]{some text}
%D \stoptyping
%D
%D the third alternative combines them in:
%D
%D \starttyping
%D \reference[here]{some text}
%D \stoptyping
\def\textreference {\dosingleargument\dotextreference}
\def\pagereference {\dosingleargument\dopagereference}
\def\reference {\dosingleargument\doreference }
%D These are implemented in a low level form as:
%D
%D \starttyping
%D \def\dotextreference[#1]{\rawtextreference\s!txt{#1}} % #2
%D \def\dopagereference[#1]{\rawpagereference\s!pag{#1}}
%D \def\doreference [#1]{\rawreference \s!ref{#1}} % #2
%D \stoptyping
%D
%D or without expansion problems:
\def\dotextreference[#1]#2%
{\bgroup
\def\asciia{#1}%
\convertexpanded\@@rfexpansion{#2}\asciib
\@EA\rawtextreference\@EA\s!txt\@EA\asciia\@EA{\asciib}%
\egroup}
\def\dopagereference[#1]%
{\rawpagereference\s!pag{#1}}
\def\doreference[#1]#2%
{\bgroup
\def\asciia{#1}%
\convertexpanded\@@rfexpansion{#2}\asciib
\@EA\rawreference\@EA\s!ref\@EA\asciia\@EA{\asciib}%
\egroup}
%D Actually there is not much difference between a text and a
%D full reference, but it's the concept that counts. The low
%D level implementation is:
\def\rawreference#1#2#3%
{\bgroup
\the\everyreference
\makesectionformat
\writereference{#2}
{\sectionformat\sectionseparator\sectionseparator\noexpand\pagenumber}
{\noexpand\realfolio}{#3}%
\egroup}
\def\rawpagereference#1#2%
{\bgroup
\the\everyreference
\makesectionformat
\writereference{#2}
{\sectionformat\sectionseparator\sectionseparator\noexpand\pagenumber}
{\noexpand\realfolio}{}%
\egroup}
\def\rawtextreference#1#2#3%
{\bgroup
\the\everyreference
\writereference{#2}
{}{\noexpand\realfolio}{#3}%
\egroup}
%D As we can see, these macros depend on three other ones,
%D \type {\makesectionformat}, that generated \type
%D {\sectionformat}, \type {\pagenumber}. The not yet used
%D argument \type{#1} is a tag that specifies the type of
%D reference.
%D \macros
%D {everyreference}
%D
%D For rather tricky purposes, one can assign sanitizing
%D macros to \type{\everyreference}.
\newevery \everyreference \relax
%D This is really needed, since for instance Polish has a
%D different alphabet and needs accented entries in registers.
\appendtoks
%\def\dohandleaccent #1#2{\string#1\string#2}%
%\def\dohandlecommand #1{\string#1}%
\cleanupfeatures
\to \everyreference
%D Why do we have to write down references? \TEX, and therefore
%D \CONTEXT\ is a batch processing system. During the
%D typesetting process, pages are shipped out, which means that
%D especially forward references are not yet known when the
%D page is typeset. That's why we always need a second (and
%D sometimes even a third) pass to get the cross references
%D right. The same goes for lists and other pagenumber
%D dependant data.
%D
%D Therefore, during a pass, \CONTEXT\ writes the references to
%D a the utility file. The next macro does the job and
%D generates entries like:
%D
%D \starttyping
%D \mainreference{prefix}{reference}{page}{realpage}{text}
%D \stoptyping
%D
%D We did not yet discuss prefixing. Especially in interactive
%D documents, it's not always easy to keep track of duplicate
%D references. The prefix mechanism, which we will describe
%D later on, solves this problem. By (automatically) adding a
%D prefix one keeps references local, but the global ones in
%D view. To enable this feature, we explictly split the prefix
%D from the reference.
%D
%D A former implementation used \type{\removesubstring} to get
%D rid of the don't||use||a||prefix signal (\type{-:}), but the
%D next one proved to be more than twice as fast.
\let\referenceprefix=\empty
\let\lastreference =\empty
%D The last reference is saved in a macro named \type
%D {\lastreference} (indeed). To keep track of the order of
%D references, later we will see for what purpose, we maintain
%D a counter.
\newcount\crossreferencenumber \crossreferencenumber=1
\def\writereference#1#2#3#4%
{\ifreferencing
\edef\!!stringa{#1}%
\ifx\!!stringa\empty \else
\def\dowritereference##1%
{\xdef\lastreference{##1}%
\@EA\dodowritereference\lastreference\empty\empty\end{#2}{#3}{#4}}%
\rawprocesscommalist[\!!stringa]\dowritereference
\fi
\fi}
%D Beware: \type {#2} gobbles space in references so that
%D \typ {a nice ref} becomes \typ {anice ref}.
\def\dodowritereference#1#2#3\end#4#5#6%
{\bgroup
\global\advance\crossreferencenumber \plusone\relax
\if#1-\if#2:%
\let\referenceprefix\empty
\xdef\lastreference{#3}%
\else
% \xdef\lastreference{#1#2#3}% here we loose the space
\fi\else
% \xdef\lastreference{#1#2#3}% here we loose the space
\fi
\ifx\lastreference\empty \else
\doiffirstreferenceoccurance\lastreference
{\thisisdestination{\referenceprefix\lastreference}}%
\referentieinfo>\lastreference
\edef\dododowritereference
{\writeutilitycommand
{\mainreference{\referenceprefix}{\lastreference}{#4}{#5}{#6}}}%
\dododowritereference
\fi
\egroup}
%D We will implement \type {\doiffirstreferenceoccurance}
%D later on.
%D When (during a second pass over the document) references are
%D loaded, they are saved in a macro, one for each reference.
%D In practice this comes to giving \type {\mainreference} a
%D appropriate meaning and loading the utility file.
% \def\setreferences
% {\def\mainreference##1##2##3##4##5%
% {\doifundefinedelse{\r!cross\fileprefix##1##2}
% {\setglobalcrossreference{##1##2}{##3}{##4}{##5}}
% {\showmessage\m!references{2}{[##1][##2],##4}}}}
% \def\setreferences
% {\the\everyreference % we're grouped anyway
% \def\mainreference##1##2##3##4##5%
% {\doifundefinedelse{\r!cross\fileprefix##1##2}
% {\setglobalcrossreference{##1##2}{##3}{##4}{##5}}
% {\ifcase0##4\else\showmessage\m!references{2}{[##1][##2],##4}\fi}}}
%D For a long time the only way to access an external file was
%D to use the file prefix (\type {somefile::}. However, when
%D you split up a document, redefining the references may be
%D such a pain, that another approach is feasible. By setting
%D the \type {autofile} variable to \type {yes} or \type
%D {page}, you can access the reference directly. The latter
%D case nills the prefix method, thereby saving some memory.
%D
%D \starttabulate[||||]
%D \NC filename::tag \NC page(filename::pnum) \NC tag \NC\NR
%D \NC $\star$ \NC \NC \NC\NR
%D \NC $\star$ \NC $\star$ \NC $\star$ \NC\NR
%D \NC \NC $\star$ \NC \NC\NR
%D \stoptabulate
\chardef\autocrossfilereferences=0
% \def\setreferences % some day, filename will be stored in ref record
% {\the\everyreference % we're grouped anyway
% \def\mainreference##1##2##3##4##5%
% {\doifundefinedelse{\r!cross\fileprefix##1##2}
% {\ifcase\autocrossfilereferences
% \setglobalcrossreference{##1##2}{##3}{##4}{##5}%
% \or
% \setglobalcrossreference{##1##2}{##3}{##4}{##5}%
% \doifundefinedelse{\r!cross##1##2}
% {\expanded{\definereference[##1##2][\fileprefix##1##2]}}
% {\showmessage\m!references2{[##1][##2],##4 (auto \currentutilityfilename)}}%
% \or
% \doifundefinedelse{\r!cross##1##2}
% {\expanded{\definereference[##1##2][\noexpand\v!pagina(\fileprefix##4)]}}
% {\showmessage\m!references2{[##1][##2],##4 (auto \currentutilityfilename)}}%
% \fi}
% {\ifcase0##4\else
% \showmessage\m!references2{[##1][##2],##4 (\currentutilityfilename)}%
% \fi}}}
% optimizing this one makes sense when we have docs with 10K
% refs.
\def\setreferences% some day, filename will be stored in ref record
{\the\everyreference % we're grouped anyway
\def\mainreference##1##2##3##4##5% can be made faster by indirect calls
{\ifundefined{\r!cross\fileprefix##1##2}% \ifcsname\r!cross\fileprefix##1##2\endcsname
\ifcase\autocrossfilereferences
\setglobalcrossreference{##1##2}{##3}{##4}{##5}%
\or
\setglobalcrossreference{##1##2}{##3}{##4}{##5}%
\doifundefinedelse{\r!cross##1##2}
{\expanded{\definereference[##1##2][\fileprefix##1##2]}}
{\showmessage\m!references2{[##1][##2],##4 (auto \currentutilityfilename)}}%
\or
\doifundefinedelse{\r!cross##1##2}
{\expanded{\definereference[##1##2][\noexpand\v!page(\fileprefix##4)]}}
{\showmessage\m!references2{[##1][##2],##4 (auto \currentutilityfilename)}}%
\fi
\else\ifcase0##4\else
\showmessage\m!references2{[##1][##2],##4 (\currentutilityfilename)}%
\fi\fi}}
\def\resetreferences
{\let\mainreference\gobblefivearguments}
\resetreferences
%D Here we see another kind of prefix surface: \type
%D {\fileprefix}. This prefix enables us to use references from
%D different files in one document. This is no really useful in
%D paper documents, but many interactive ones cannot do
%D without.
\let\fileprefix=\empty
%D Loading references is done using the normal utility file
%D handling macros. The \type{\hbox} trick prevents spaces
%D creeping in (references are set globally anyway).
\newtoks\everycheckreferences
%D When we load references, the file name is stored in a
%D list.
\let\loadedreferences\empty
%D We only load references ones.
\newconditional\jobreferencesloaded
%D This token list is expanded after the references are loaded.
%D This hook can be used to initialize mechanisms that depend
%D on the reference mechsnism. An example can be found in the
%D field module.
\def\checkreferences
{\bgroup
\let\fileprefix\empty
\global\let\checkreferences\relax
\usereferences[\jobname]%
\checkrealpage
\egroup
\the\everycheckreferences}
\def\usereferences[#1]%
{\startnointerference
\checkreferences
\doifparentfileelse{#1}
{\ifconditional\jobreferencesloaded\else
\doutilities{references}{#1}\empty\relax\relax
\global\settrue\jobreferencesloaded
\fi}
{\ExpandBothAfter\doifnotinset{#1}{\loadedreferences}
{\doutilities{references}{#1}\empty\relax\relax
\ifx\fileprefix\empty\else
\doglobal\addtocommalist{#1}\loadedreferences
\fi}}
\stopnointerference}
%D As mentioned we will also use the cross reference mechanism
%D for navigational purposes. The main reason for this is that
%D we want to treat both categories alike:
%D
%D \starttyping
%D \goto{go back}[PreviousJump]
%D \goto{colofon}[colofon page]
%D \stoptyping
%D
%D Here \type{PreviousJump} is handled by the viewer, while the
%D \type{colofon page} reference is, apart from hyperlinking, a
%D rather normal reference.
%D
%D We already saw that cross refences are written to and read
%D from a file. The pure navigational ones don't need to be
%D written to file, but both for fast processing and
%D transparant integration, they are saved internally as a sort
%D of reference. We can easily distinguish such system
%D references from real cross reference ones by their tag:
\chardef\rt!cross=0 % even means possible page reference
\chardef\rt!done =1
\chardef\rt!page =2 % and is used in \checkrealreferencepage
\chardef\rt!exec =3
\chardef\rt!list =4 % to determine the page state
%D We also use the odd/even characteristic to determine the
%D page state.
%D Here the \type{\rt!exec} tags a viewer specific navigational
%D reference, while for instance \type{\rt!page} gives fast
%D access to for instance the previous or next page. The
%D counter serves a purpose to be explained later. We use a
%D token register to prevent expansion of the text component,
%D which can contain all kind of \TEX\ commands.
\newcount\crossreferenceorder
% these are used often so we sped them up
\def\setlocalcrossreference#1#2#3#4%
{\scratchtoks{#4}%
\@EA\edef\csname\r!cross\fileprefix#1\endcsname
{\rt!cross{#2}{#3}{\the\scratchtoks}{0}}}
\def\setglobalcrossreference#1#2#3#4%
{\scratchtoks{#4}%
\global\advance\crossreferenceorder 1
\@EA\xdef\csname\r!cross\fileprefix#1\endcsname
{\rt!cross{#2}{#3}{\the\scratchtoks}{\the\crossreferenceorder}}}
\def\setlocalsystemreference#1#2#3%
{\@EA\edef\csname\r!cross\fileprefix#2\endcsname{#1{#3}}}
\def\setglobalsystemreference#1#2#3%
{\@EA\xdef\csname\r!cross\fileprefix#2\endcsname{#1{#3}}}
% Maybe I need this some day.
% \def\copycrossreference#1#2#3% file from to
% {\bgroup
% \def\fileprefix{#1::}%
% \def\rt!cross##1##2##3##4%
% {\setxvalue{\r!cross\fileprefix#3}%
% {\noexpand\rt!cross{##1}{##2}{##3}{##4}}}%
% \getvalue{\r!cross\fileprefix#2}%
% \egroup}
\def\copycrossreference#1#2#3% file from to / slow
{\bgroup
\doifelse{#1}{}
{\let\fileprefix\empty}
{\def\fileprefix{#1::}}%
\def\rt!cross##1##2##3##4%
{\setxvalue{\r!cross\fileprefix#3}%
{\noexpand\rt!cross{##1}{##2}{##3}{##4}}}%
\getvalue{\r!cross\fileprefix#2}%
\egroup}
%D References from other files are defined globally without
%D ordering data. The first definition, the one without
%D \type{#1}, is used as a signal that references are defined.
\def\setoutercrossreference#1#2#3#4%
{\toks0={#4}%
\@EA\xdef\csname\r!cross\fileprefix \endcsname{\rt!cross{}{}{1}{0}}%
\@EA\xdef\csname\r!cross\fileprefix#1\endcsname{\rt!cross{#2}{#3}{\the\toks0}{0}}}
%D In practice accessing a reference comes down to:
%D
%D \startitemize[packed]
%D \item checking the validity
%D \item determining the type
%D \item filtering the content
%D \stopitemize
%D
%D We'll deal with the last two steps first. References are
%D saved in the general format:
%D
%D \starttyping
%D {\referenceclass{realpage}{page}{text}}
%D {\referenceclass{type}{data}}
%D \stoptyping
%D
%D When we filter the content, next macros are set when we
%D meet a normal cross reference:
\let\currentrealreference =\empty
\let\currentpagereference =\empty
\let\currenttextreference =\empty
\let\currentsubtextreference =\empty
\let\currentsubsubtextreference=\empty
%D System references only have one component:
\let\currentdatareference=\empty
%D Because internally a reference comes in two disguises, one
%D with four arguments and one with only two, we need a two
%D step filter.
%\def\getreferenceelements#1%
% {\edef\referenceelements{\getvalue{\r!cross\referenceprefix#1}}%
% \expandafter\dogetreferenceelements\referenceelements{}{}{}{}}
%
%\def\getreferenceelements#1% only one level expansion permitted!
% {\@EA\@EA\@EA\dogetreferenceelements\csname\r!cross\referenceprefix#1\endcsname{}{}{}{}}
\def\getreferenceelements#1% only one level expansion permitted!
{\@EA\@EA\@EA\dogetreferenceelements\csname\r!cross\referenceprefix#1\endcsname\empty\empty\empty\empty}
%D In the following step, the \type{\ifx#1} test is needed
%D because we can access this macro directly, and therefore
%D \type{#1} can be an undefined reference (in fact, this hack
%D was needed for the line numbering mechanism).
%D
%D We already introduced a few counters. Here we see why we
%D need those. The discrepancy between the cross reference
%D definition order (determined by the utility file) and the
%D moment the reference is defined in the text, is a measure
%D for it's forward character. This enables references like
%D {\em as we will see later on}.
\chardef\currentreferencetype=0
\newif\ifforwardreference
\newif\ifrealreferencepage
\def\docheckrealreferencepage#1%
{\doifnumberelse{#1}
{\ifnum#1=\realpageno
\realreferencepagetrue
\else
\realreferencepagefalse
\fi}
{\realreferencepagefalse}}
\def\currentfolioreference{0}
\def\dogetreferenceelements#1#2#3#4#5%
{\chardef\currentreferencetype=\ifx#1\relax0\else#1\fi\relax
\ifnum\currentreferencetype<2
\edef\currentpagereference{#2}%
\ifx\currentpagereference \empty
\let\currentfolioreference\folio
\else
\def \currentpagereference {\referencepagenumber[#2]}%
\edef\currentfolioreference{\dosplitofffoliopart[#2]}%
\fi
\edef\currentrealreference{#3}%
\settextreferences#4\end
\ifnum0#5<\crossreferencenumber
\forwardreferencetrue
\else
\forwardreferencefalse
\fi
\else
\edef\currentrealreference {#3}%
\def \currentdatareference {#2}%
\let \currentfolioreference\folio
\settextreferences#4\end
\forwardreferencefalse
\fi
\ifodd\currentreferencetype
\realreferencepagefalse
\else
\docheckrealreferencepage\currentrealreference
\ifrealreferencepage \else
\docheckrealreferencepage\currentdatareference
\fi
\fi}
\ifx\referencepagenumber\undefined
\def\referencepagenumber[#1]{?}
\fi
%D Text references can contain more than one entry and
%D therefore we check for
%D
%D \starttyping
%D {entry}
%D \stoptyping
%D
%D or
%D
%D \starttyping
%D {{entry}{entry}{entry}}
%D \stoptyping
%D
%D and split accordingly.
\def\settextreferences
{\futurelet\next\dosettextreferences}
\def\dosettextreferences
{\ifx\next\bgroup
\expandafter\dotriplegroupempty\expandafter\dodosettextreferences
\else
\expandafter\donosettextreferences
\fi}
\def\donosettextreferences#1\end
{\def\currenttextreference{#1}%
\let\currentsubtextreference\empty
\let\currentsubsubtextreference\empty}
\def\dodosettextreferences#1#2#3#4\end
{\def\currenttextreference{#1}%
\def\currentsubtextreference{#2}%
\def\currentsubsubtextreference{#3}}
%D When inside this testing macro we can savely use:
\def\doifforwardreferenceelse#1#2%
{\ifforwardreference#1\else#2\fi}
%D Duplicate references are reported while loading the utility
%D file. To prevent problems with document viewers cq.
%D preprocessors, one can enable a (bit time consuming) check.
\newif\ifcheckduplicatereferences
%D The next rather dirty trick is needed to preserve the
%D meaning of the original cross reference. In fact,
%D \type{\rt!cross} is toggled to \type{\rt!done}.
% \def\doiffirstreferenceoccurance#1#2%
% {\ifcheckduplicatereferences
% \doifundefinedelse{\r!cross\referenceprefix#1}
% {#2}
% {\getreferenceelements{#1}%
% \ifnum\currentreferencetype=\rt!cross
% #2%
% \bgroup
% \def\rt!cross##1##2##3##4%
% {\setgvalue{\r!cross\referenceprefix#1}%
% {\rt!done{##1}{##2}{##3}{##4}}}%
% \getvalue{\r!cross\referenceprefix#1}%
% \egroup
% \fi}%
% \else
% #2%
% \fi}
\def\rt!crossdone#1#2#3#4{\rt!done{#1}{#2}{#3}{#4}}
\def\dohandleduplicatereference#1%
{\bgroup
\let\rt!cross\rt!crossdone
\@EA\xdef\csname\r!cross\referenceprefix#1\endcsname
{\csname\r!cross\referenceprefix#1\endcsname}%
\egroup}
\def\checkfirstreferenceoccurance#1#2%
{\ifcsname\r!cross\referenceprefix#1\endcsname
\getreferenceelements{#1}%
\ifnum\currentreferencetype=\rt!cross
\dohandleduplicatereference{#1}%
#2%
\fi
\else
#2%
\fi}
\def\doiffirstreferenceoccurance
{\ifcheckduplicatereferences
\@EA\checkfirstreferenceoccurance
\else
\@EA\secondoftwoarguments
\fi}
%D We still have to test for the existence of a reference, but
%D before we come to that, we first look into the way a
%D reference can be accessed. It will be no surprise that
%D references can come in several forms.
%D
%D Cross references appear as numbers (figure~1.1, chapter~2)
%D or pagenumbers (page~2, page 3--2), and are called with
%D \type{\in} and \type{\at}. In interactive documents we also
%D have \type{\goto}, \type{\button} and alike. These are more
%D versatile and look like:
%D
%D \starttyping
%D \goto[reference]
%D \goto[outer reference::]
%D \goto[outer reference::inner reference]
%D \goto[operation(argument)]
%D \goto[operation(action{argument,argument})]
%D \goto[action]
%D \goto[action{argument}]
%D \stoptyping
%D
%D The first one is a normal reference, the second and third
%D are references to a file or \URL. The brace delimited
%D references for instance refer to a \JAVASCRIPT. The last
%D example shows that we can pass arguments to the actions.
%D
%D When we split off the components of such a reference, the
%D results are available in:
%D
%D \starttyping
%D \currentreferencespecial
%D \currentreferenceoperation
%D \currentreferencearguments
%D \currentinnerreference
%D \currentouterreference
%D \currentfullreference
%D \stoptyping
%D
%D Splitting a reference is done by:
%D
%D \starttyping
%D \splitofffullreference {reference}
%D \splitoffreference {reference}
%D \stoptyping
%D
%D The second alternative can be used in a second stage
%D splitoff and only handles \type{::}.
\newif\ifreferencefound
\let\currentfullreference =\empty
\let\currentreferencespecial =\empty
\let\currentreferenceoperation=\empty
\let\currentreferencearguments=\empty
\let\currentouterreference =\empty
\let\currentinnerreference =\empty
\def\splitofffullreference#1%
{\edef\currentfullreference{#1}%
\@EA\dosplitofffullreference\currentfullreference\empty(\relax)\empty\end}
\def\dosplitofffullreference#1(#2#3)#4#5\end
{\ifx#2)%
\let\currentreferenceoperation\empty
\let\currentreferencearguments\empty
\let\currentinnerreference \empty
\dodosplitofffullreferenceA#1::::\empty\end
\currentouterreference\currentreferencespecial
\else\ifx#2\relax
\let\currentreferencespecial \empty
\let\currentreferenceoperation\empty
\let\currentreferencearguments\empty
\dodosplitofffullreferenceA#1::::\empty\end
\currentouterreference\currentinnerreference
\else
\dosplitoffreferenceoperation#2#3{}\end
\let\currentinnerreference\empty
\dodosplitofffullreferenceB#1::::\empty\end
\currentouterreference\currentreferencespecial
\fi\fi}
\def\dosplitoffreferenceoperation#1#%
{\def\currentreferenceoperation{#1}%
\dodosplitoffreferenceoperation}
\def\dodosplitoffreferenceoperation#1#2\end
{\def\currentreferencearguments{#1}}
\def\dodosplitofffullreferenceA#1::#2::#3#4\end#5#6%
{\if#3:%
\dosetfullreferenceA#5#1{}\edef#6{#2}%
\else
\dosetfullreferenceA#6#1{}\let#5\empty
\fi}
\def\dosetfullreferenceA#1#2#%
{\edef#1{#2}%
\def\currentreferencearguments}
\def\dodosplitofffullreferenceB#1::#2::#3#4\end#5#6%
{\if#3:%
\edef#5{#1}\edef#6{#2}%
\else
\let#5\empty\edef#6{#1}%
\fi}
\def\splitoffreference#1%
{\expandafter\dodosplitofffullreferenceB#1::::\empty\end
\currentouterreference\currentinnerreference}
%D Although the previous split macros have a multistep
%D character, there performance is quite reasonable.
%D
%D For debugging purposes we provide a showcase macro:
\long\def\dodoshowcurrentreference#1\from#2\with#3%
{\convertcommand#2\to\ascii
\edef\currentreferenceshow{\currentreferenceshow/#1/\ascii/#3/}}
\long\def\doshowcurrentreference#1%
{\edef\currentreferenceshow{/\ifreferencefound+\else-\fi/#1}%
\dodoshowcurrentreference ful\from\currentfullreference \with#1%
\dodoshowcurrentreference spe\from\currentreferencespecial \with#1%
\dodoshowcurrentreference ope\from\currentreferenceoperation\with#1%
\dodoshowcurrentreference arg\from\currentreferencearguments\with#1%
\dodoshowcurrentreference out\from\currentouterreference \with#1%
\dodoshowcurrentreference inn\from\currentinnerreference \with#1}
\def\showcurrentreference%
{\bgroup\tttf\doshowcurrentreference\par\currentreferenceshow\egroup}
%D We use this visualizer to demonstrate the way references are
%D split.
%D
%D \hbox{\splitofffullreference{rr}\showcurrentreference}
%D \hbox{\splitofffullreference{pp{rr}}\showcurrentreference}
%D \hbox{\splitofffullreference{pp(qq)}\showcurrentreference}
%D \hbox{\splitofffullreference{pp(qq{aa,bb})}\showcurrentreference}
%D \hbox{\splitofffullreference{ff::}\showcurrentreference}
%D \hbox{\splitofffullreference{ff::rr}\showcurrentreference}
%D \hbox{\splitofffullreference{ff::pp()}\showcurrentreference}
%D \hbox{\splitofffullreference{ff::pp(qq)}\showcurrentreference}
%D \hbox{\splitofffullreference{ff::pp(qq{aa})}\showcurrentreference}
%D Now we've come to the promissed testing step. As we can
%D see, this macro does bit more than testing: it also resolves
%D the reference. This means that whenever we test for the
%D existance of a reference at an outer level, we have all the
%D relevant properties of that reference avaliable inside the
%D true branche~(\type{#2}).
%D
%D The prefix has to do with localizing references. When a
%D prefix is set, looking for a reference comes to looking for
%D the prefixed one, and when not found, looking for the non
%D prefixed one. Consider for instance the prefix set to
%D \type{sidetrack}.
%D
%D \starttyping
%D \pagereference[important]
%D \pagereference[unimportant]
%D \setupreferencing[prefixprefix=sidetrack]
%D \pagereference[important]
%D \stoptyping
%D
%D results in saving (writing) the references
%D
%D \starttyping
%D ...{}{important}
%D ...{}{unimportant}
%D ...{sidetrack}{important}...
%D \stoptyping
%D
%D Now when we call for \type{unimportant}, we will indeed get
%D the pagenumber associated to this reference. But when we
%D call for \type{important}, while the prefix is still set, we
%D will get the pagenumber bound to the prefixed one.
%D
%D {\em Some day, when processing time and memory are no longer
%D performance factors, we will introduce multi||level
%D prefixes.}
%D
%D Before we start analyzing, I introduce a general
%D definition macro. Consider:
%D
%D \starttyping
%D \goto{do}[JS(My_Script{"test",123}),titlepage]
%D \stoptyping
%D
%D This can also be achieved by:
%D
%D \starttyping
%D \definereference[startup][JS(My_Script{"test",123}),titlepage]
%D \goto{do}[REF(startup)]
%D \stoptyping
%D
%D Now is this is a handy feature or not?
%D
%D \showsetup{\y!definereference}
%D
%D We can trace references by setting the next switch to
%D true.
\newif\iftracereferences
\let\tracereferences\tracereferencestrue
\def\specialREFidentifier{REF}
\def\dodefinereference[#1][#2]%
{\ifsecondargument
\doifelsenothing{#2}
{\resetreference[#1]}%
{\@EA\gdef\csname\specialREFidentifier#1\endcsname{#2}}%
\else\iffirstargument
\resetreference[#1]%
\fi\fi}
\def\definereference%
{\dodoubleempty\dodefinereference}
\def\resetreference[#1]%
{\global\letbeundefined{\specialREFidentifier#1}}
\beginTEX
% \def\dodoifreferencefoundelse#1#2#3%
% {\checkreferences
% \bgroup
% \let\unharmedreferenceprefix=\referenceprefix
% \bgroup
% \splitofffullreference{#1}%
% \ifx\currentreferencespecial\specialREFidentifier
% \@EA\ifx\csname\specialREFidentifier\currentreferenceoperation\endcsname\relax
% \global\referencefoundfalse
% \else
% \global\referencefoundtrue
% \@EA\@EA\@EA\splitofffullreference\@EA\@EA\@EA % 1 level
% {\csname\specialREFidentifier\currentreferenceoperation\endcsname}%
% \fi
% \else
% \global\referencefoundtrue
% \fi
% \ifreferencefound
% \ifx\currentreferencespecial\empty
% \ifx\currentouterreference\empty
% \docheckinnerreference
% \ifreferencefound \else
% \checkglobalfilereferences
% \fi
% \else
% \docheckouterreference
% \fi
% \ifreferencefound
% \ifx\currentreferencearguments\empty
% \getreferenceelements\currentfullreference
% \else
% \getreferenceelements\currentinnerreference
% \fi
% \fi
% \else
% \docheckspecialreference
% \fi
% \fi
% \ifreferencefound \else
% \let\referenceprefix\empty
% \@EA\ifx\csname\specialREFidentifier#1\endcsname\relax\else
% \@EA\@EA\@EA\splitofffullreference\@EA\@EA\@EA % 1 level
% {\csname\specialREFidentifier#1\endcsname}%
% \ifx\currentreferencespecial\empty
% \ifx\currentouterreference\empty
% \docheckinnerreference
% \ifreferencefound \else
% \checkglobalfilereferences
% \fi
% \else
% \docheckouterreference
% \fi
% \ifreferencefound
% % \getreferenceelements\currentfullreference
% \ifx\currentreferencearguments\empty
% \getreferenceelements\currentfullreference
% \else
% \getreferenceelements\currentinnerreference
% \fi
% \fi
% \else
% \docheckspecialreference
% \fi
% \fi
% \fi
% \iftracereferences
% \doshowcurrentreference\space
% \writestatus{\m!references}{\currentreferenceshow}%
% \fi
% \ifreferencefound#2\else#3\fi
% \egroup
% \egroup}
\newcount\nofexpandedreferences
\def\dodoexpandreferences#1REF(#2#3)#4\relax
{\ifx#2\relax
\@EA\ifx\csname\specialREFidentifier#1\endcsname\relax
\global\advance\nofexpandedreferences \plusone
\@EA\xdef\csname REF::\number\nofexpandedreferences\endcsname{#1}%
\else
\edef\expandedreference{\csname\specialREFidentifier#1\endcsname,}%
\fi
\else
\@EA\ifx\csname\specialREFidentifier#2#3\endcsname\relax
% not set
\else
\edef\expandedreference{\csname\specialREFidentifier#2#3\endcsname,}%
\fi
\fi}
\endTEX
\beginETEX \ifcsname
% \def\dodoifreferencefoundelse#1#2#3%
% {\checkreferences
% \bgroup
% \let\unharmedreferenceprefix=\referenceprefix
% \bgroup
% \splitofffullreference{#1}%
% \ifx\currentreferencespecial\specialREFidentifier
% \ifcsname\specialREFidentifier\currentreferenceoperation\endcsname
% \global\referencefoundtrue
% \@EA\@EA\@EA\splitofffullreference\@EA\@EA\@EA % 1 level
% {\csname\specialREFidentifier\currentreferenceoperation\endcsname}%
% \else
% \global\referencefoundfalse
% \fi
% \else
% \global\referencefoundtrue
% \fi
% \ifreferencefound
% \ifx\currentreferencespecial\empty
% \ifx\currentouterreference\empty
% \docheckinnerreference
% \ifreferencefound \else
% \checkglobalfilereferences
% \fi
% \else
% \docheckouterreference
% \fi
% \ifreferencefound
% \ifx\currentreferencearguments\empty
% \getreferenceelements\currentfullreference
% \else
% \getreferenceelements\currentinnerreference
% \fi
% \fi
% \else
% \docheckspecialreference
% \fi
% \fi
% \ifreferencefound \else
% \let\referenceprefix=\empty
% \ifcsname\specialREFidentifier#1\endcsname
% \@EA\@EA\@EA\splitofffullreference\@EA\@EA\@EA % 1 level
% {\csname\specialREFidentifier#1\endcsname}%
% \ifx\currentreferencespecial\empty
% \ifx\currentouterreference\empty
% \docheckinnerreference
% \ifreferencefound \else
% \checkglobalfilereferences
% \fi
% \else
% \docheckouterreference
% \fi
% \ifreferencefound
% % \getreferenceelements\currentfullreference
% \ifx\currentreferencearguments\empty
% \getreferenceelements\currentfullreference
% \else
% \getreferenceelements\currentinnerreference
% \fi
% \fi
% \else
% \docheckspecialreference
% \fi
% \fi
% \fi
% \iftracereferences
% \doshowcurrentreference\space
% \writestatus{\m!references}{\currentreferenceshow}%
% \fi
% \ifreferencefound#2\else#3\fi
% \egroup
% \egroup}
\newcount\nofexpandedreferences
\def\dodoexpandreferences#1REF(#2#3)#4\relax
{\ifx#2\relax
\ifcsname\specialREFidentifier#1\endcsname
\edef\expandedreference{\csname\specialREFidentifier#1\endcsname,}%
\else
\global\advance\nofexpandedreferences \plusone
\@EA\xdef\csname REF::\number\nofexpandedreferences\endcsname{#1}%
\fi
\else
\ifcsname\specialREFidentifier#2#3\endcsname
\edef\expandedreference{\csname\specialREFidentifier#2#3\endcsname,}%
\else
% not set
\fi
\fi}
\endETEX
\def\doexpandreferences#1,%
{\if]#1\else
\let\expandedreference\empty
\dodoexpandreferences#1REF(\relax)\relax
\@EAEAEA\doexpandreferences\@EA\expandedreference
\fi}
\def\expandreferences#1%
{\global\nofexpandedreferences\zerocount
\doexpandreferences#1,],}
\def\dodoifreferencefoundelse#1%
{\@EA\splitofffullreference\@EA{#1}%
\ifx\currentreferencespecial\empty
\ifx\currentouterreference\empty
\docheckinnerreference
\ifreferencefound \else
\checkglobalfilereferences
\fi
\else
\docheckouterreference
\fi
\ifreferencefound
\ifx\currentreferencearguments\empty
\getreferenceelements\currentfullreference
\else
\getreferenceelements\currentinnerreference
\fi
\fi
\else
\docheckspecialreference
\fi
\iftracereferences
\doshowcurrentreference\space
\writestatus\m!references\currentreferenceshow
\fi}
%D Although this can be considered a hack, we provide the
%D option to locate unknown references in other (loaded) files.
%D This can be dangerous, since there can be conflicting
%D definitions.
\newconditional\autoglobalfilereferences
\def\checkglobalfilereferences% sloooow
{\ifconditional\autoglobalfilereferences
% \processcommacommand[\loadedreferences]\docheckglobalfilereference
\rawprocesscommalist[\loadedreferences]\docheckglobalfilereference
\fi}
\def\docheckglobalfilereference#1%
{\ifundefined{\r!cross#1::\currentinnerreference}\else
\def\currentouterreference{#1}%
\edef\currentfullreference%
{\currentouterreference::\currentinnerreference}%
\global\referencefoundtrue
\quitcommalist
\fi}
%D For most situations, we could use:
%D
%D \starttyping
%D \let\doifreferencefoundelse=\dodoifreferencefoundelse
%D \stoptyping
%D
%D But when we also want to support chained references, we need
%D some more. Such a chained reference is defined as:
%D
%D \starttyping
%D \goto{somewhere}[JS(somescript),nextpage,JS(anotherscript)]
%D \stoptyping
%D
%D Actually supporting chains is up to the special driver. Here
%D we only provide the hooks.
%D \macros
%D {ifenablereferencechains}
%D
%D First we provide a switch to turn this mechanism off:
\newif\ifenablereferencechains \enablereferencechainstrue
%D We don't use the general commalist processing macros,
%D because we don't want to pay a speed penalty.
\newif\ifsecondaryreference
\newcount\nofsecondaryreferences
% Aanpassen: eerst alle refs scannen en componenten opslaan in
% lijst, dan de chain doorlopen. Momenteel mag alleen laatste
% laatste undefined zijn, eigenlijk moet dat overal kunnen met
% 'geen' zonder melding. Is wel trager. Dus niet.
%
% \def\doifreferencefoundelse#1#2#3% \@EA niet nodig
% {\doresetgotowhereever
% \global\secondaryreferencefalse
% {\the\everyreference\xdef\primaryreference{#1}}%
% \global\nofsecondaryreferences=0
% \def\dopreprocessreference##1,%
% {\if]##1\else
% \ifsecondaryreference
% \ifenablereferencechains \iflocation
% {\the\everyreference\xdef\secondaryreference{##1}}%
% %\global\advance\nofsecondaryreferences by 1
% \@EA\dodoifreferencefoundelse\@EA{\secondaryreference}
% {\global\advance\nofsecondaryreferences by 1
% #2}
% {%\global\advance\nofsecondaryreferences by -1
% \dostartnoto#3\dostopnoto}%
% \fi \fi
% \else
% {\the\everyreference\xdef\primaryreference{##1}}%
% \global\secondaryreferencetrue
% \fi
% \expandafter\dopreprocessreference
% \fi}%
% \dopreprocessreference#1,],%
% \global\secondaryreferencefalse
% \@EA\dodoifreferencefoundelse\@EA{\primaryreference}{#2}{#3}%
% \doresetgotowhereever} % to prevent problems with direct goto's
% \def\doifreferencefoundelse#1#2#3% REF \cs
% {\checkreferences
% \bgroup
% \the\everyreference
% \let\referenceprefix\empty
% \expandreferences{#1}%
% \egroup
% \doresetgotowhereever
% \global\nofsecondaryreferences 0
% \ifcase\nofexpandedreferences\relax % #1 can be number -)
% % no ref
% \or
% % one ref
% \or
% % two refs
% \ifenablereferencechains \iflocation
% \global\secondaryreferencetrue
% \xdef\secondaryreference{\csname REF::2\endcsname}%
% \bgroup
% \let\unharmedreferenceprefix\referenceprefix
% %\bgroup
% \dodoifreferencefoundelse\secondaryreference
% \global\nofsecondaryreferences 1
% \ifreferencefound
% #2%
% \else
% \dostartnoto#3\dostopnoto
% \fi
% %\egroup
% \egroup
% \fi \fi
% \else
% % more than two refs
% \ifenablereferencechains \iflocation
% \global\secondaryreferencetrue
% \scratchcounter2
% \loop
% \xdef\secondaryreference{\csname REF::\number\scratchcounter\endcsname}%
% \bgroup
% \let\unharmedreferenceprefix\referenceprefix
% %\bgroup
% \dodoifreferencefoundelse\secondaryreference
% \global\advance\nofsecondaryreferences 1
% \ifreferencefound
% #2%
% \else
% \global\advance\nofsecondaryreferences -1
% \dostartnoto#3\dostopnoto
% \fi
% %\egroup
% \egroup
% \ifnum\scratchcounter<\nofexpandedreferences\relax
% \advance\scratchcounter 1
% \repeat
% \fi \fi
% \fi
% \global\secondaryreferencefalse
% \xdef\primaryreference{\csname REF::1\endcsname}%
% \bgroup
% \let\unharmedreferenceprefix\referenceprefix
% %\bgroup
% \dodoifreferencefoundelse\primaryreference
% \ifreferencefound#2\else#3\fi
% %\egroup
% \egroup
% \doresetgotowhereever} % to prevent problems with direct goto's
\def\doifreferencefoundelse#1#2#3% REF \cs
{\checkreferences
% first we collect the secondary ones
\bgroup
\the\everyreference
\let\referenceprefix\empty
\expandreferences{#1}%
\egroup
\doresetgotowhereever
\global\nofsecondaryreferences \zerocount
\ifcase\nofexpandedreferences\relax % #1 can be number -)
% no ref
\or
% one ref
\or
% two refs
\ifenablereferencechains \iflocation
\global\secondaryreferencetrue
\xdef\secondaryreference{\csname REF::2\endcsname}%
% test: \global\letcscsname\secondaryreference\csname REF::2\endcsname
\bgroup
%%\let\doifreferencefoundelse\localdoifreferencefoundelse
\let\unharmedreferenceprefix\referenceprefix
\dodoifreferencefoundelse\secondaryreference
\ifreferencefound
\global\nofsecondaryreferences \plusone
#2%
\else
\dostartnoto#3\dostopnoto
\fi
\egroup
\fi \fi
\else
% more than two refs
\ifenablereferencechains \iflocation
\global\secondaryreferencetrue
\scratchcounter\plustwo
\loop
\xdef\secondaryreference{\csname REF::\number\scratchcounter\endcsname}%
% test: \global\letcscsname\secondaryreference\csname REF::\number\scratchcounter\endcsname
\bgroup
%%\let\doifreferencefoundelse\localdoifreferencefoundelse
\let\unharmedreferenceprefix\referenceprefix
\dodoifreferencefoundelse\secondaryreference
\ifreferencefound
\global\advance\nofsecondaryreferences \plusone
#2%
\else
\dostartnoto#3\dostopnoto
\fi
\egroup
\ifnum\scratchcounter<\nofexpandedreferences\relax
\advance\scratchcounter \plusone
\repeat
\fi \fi
\fi
\global\secondaryreferencefalse
\xdef\primaryreference{\csname REF::1\endcsname}%
% test: \global\letcscsname\secondaryreference\csname REF::1\endcsname
\bgroup
% now we handle the primary one
%%\let\doifreferencefoundelse\localdoifreferencefoundelse
\let\unharmedreferenceprefix\referenceprefix
\dodoifreferencefoundelse\primaryreference
\ifreferencefound#2\else#3\fi
\egroup
\doresetgotowhereever} % to prevent problems with direct goto's
%D The following local redefinition permits the usage of
%D nested \type {\doifreferencefoundelse}; see for an
%D example the local test for file|/|url references. This is
%D a fuzzy part of this mechanism and a result of the choice
%D to let speed prevail over beauty in resolving chained
%D references with symbolic (defined) references.
% \def\localdoifreferencefoundelse#1#2#3% beware, this feeds back the (...) ref
% {\dodoifreferencefoundelse{#1}%
% \ifreferencefound#2\else#3\fi}
\def\localdoifreferencefoundelse#1%
{\dodoifreferencefoundelse{#1}%
\ifreferencefound\@EA\firstoftwoarguments\else\@EA\secondoftwoarguments\fi}
%D Somewhere else we will properly define \type {\dostartgoto};
%D the noto alternative takes care of undefined references in
%D a sequence
\ifx\dostartnoto\undefined
\def\dostartnoto#1\dostopnoto
{\ifsecondaryreference\else{#1}\fi}
\fi
\ifx\dostartgoto\undefined
\def\dostartgoto\data#1\start#2\stop#3\dostopgoto
{\ifsecondaryreference\else{#1}\fi}
\fi
%D As one can see, while processing the references, the first
%D one is handled last. While scanning the second and following
%D ones, we increment a counter and set a boolean to true.
%D The next fast one permits rather raw references with
%D \type{()}'s and is used in the object reference mechanism.
\def\doifrawreferencefoundelse#1#2#3%
{\checkreferences
\bgroup
\edef\currentfullreference{#1}%
\ifundefined{\r!cross\currentfullreference}%
\global\referencefoundfalse #3%
\else\getreferenceelements\currentfullreference
\global\referencefoundtrue #2%
\fi
\egroup}
%D The inner case is simple. Only two cases have to be taken
%D care of:
%D
%D \starttyping
%D \goto{some text}[reference]
%D \goto{some text}[prefix:reference]
%D \stoptyping
%\def\docheckinnerreference%
% {\global\let\predefinedreference=\currentinnerreference
% \ifx\currentreferencearguments\empty
% \doifdefinedelse{\r!cross\referenceprefix\currentfullreference}
% {\global\referencefoundtrue}
% {\let\referenceprefix\empty
% \doifdefinedelse{\r!cross\currentfullreference}
% {\global\referencefoundtrue}
% {\global\referencefoundfalse}}%
% \else % [SomeThing{with,me}]
% \let\referenceprefix\empty
% \doifdefinedelse{\r!cross\currentinnerreference}
% {\global\referencefoundtrue}
% {\global\referencefoundfalse}%
% \fi
% \doifpredefinedreferenceelse{\global\referencefoundfalse}{}}
\beginETEX
\def\docheckinnerreference
{\global\let\predefinedreference\currentinnerreference
\ifx\currentreferencearguments\empty
\ifcsname\r!cross\referenceprefix\currentfullreference\endcsname
\global\referencefoundtrue
\else
\let\referenceprefix\empty
\ifcsname\r!cross\currentfullreference\endcsname
\global\referencefoundtrue
\else
\global\referencefoundfalse
\fi
\fi
\else % [SomeThing{with,me}]
\let\referenceprefix\empty
\ifcsname\r!cross\currentinnerreference\endcsname
\global\referencefoundtrue
\else
\global\referencefoundfalse
\fi
\fi
\doifpredefinedreferenceelse{\global\referencefoundfalse}\donothing}
\endETEX
\beginTEX
\def\docheckinnerreference
{\global\let\predefinedreference\currentinnerreference
\ifx\currentreferencearguments\empty
\@EA\ifx\csname\r!cross\referenceprefix\currentfullreference\endcsname\relax
\let\referenceprefix\empty
\@EA\ifx\csname\r!cross\currentfullreference\endcsname\relax
\global\referencefoundfalse
\else
\global\referencefoundtrue
\fi
\else
\global\referencefoundtrue
\fi
\else % [SomeThing{with,me}]
\let\referenceprefix\empty
\@EA\ifx\csname\r!cross\currentinnerreference\endcsname\relax
\global\referencefoundfalse
\else
\global\referencefoundtrue
\fi
\fi
\doifpredefinedreferenceelse{\global\referencefoundfalse}\donothing}
\endTEX
%D References to other files however are treated strict or
%D tolerant, depending on their loading and availability:
%D
%D \starttyping
%D \useexternaldocument[somefile][filename][a nice description]
%D
%D \goto{checked reference}[somefile::reference]
%D \goto{unchecked reference}[somefile::]
%D \goto{unchecked reference}[anotherfile::reference]
%D \stoptyping
%D
%D Here we use the dummy reference \type{somefile::} set in
%D \type{\setouterreference} as a signal that indeed references
%D are defined for the outer file.
% \def\docheckouterreference%
% {\let\referenceprefix=\empty
% \let\unharmedreferenceprefix=\empty
% \xdef\predefinedreference%
% {\currentouterreference::\currentinnerreference}%
% \ifx\innerreference\empty
% \global\referencefoundtrue % no checking done
% \else
% \doifdefinedelse{\r!cross\currentouterreference::}
% {\doifdefinedelse{\r!cross\currentfullreference}
% {\global\referencefoundtrue}
% {\global\referencefoundfalse}}
% {\global\referencefoundtrue}% no checking done
% \fi
% \doifpredefinedreferenceelse{\global\referencefoundfalse}{}}
\newif\ifstrictouterreferences \strictouterreferencesfalse
\beginTEX
\def\dodocheckouterreference
{\@EA\ifx\csname\specialREFidentifier\currentfullreference\endcsname\relax
\ifstrictouterreferences
\global\referencefoundfalse
\else
% already \global\referencefoundtrue % no checking done
\fi
\else
\@EA\@EA\@EA\splitofffullreference\@EA\@EA\@EA % 1 level
{\csname\specialREFidentifier\currentfullreference\endcsname}%
\docheckouterreference
\fi}
\def\docheckouterreference
{\let\referenceprefix\empty
\let\unharmedreferenceprefix\empty
\xdef\predefinedreference
{\currentouterreference::\currentinnerreference}%
\ifx\innerreference\empty
\global\referencefoundtrue % no checking done
\else
\@EA\ifx\csname\r!cross\currentouterreference::\endcsname\relax
\ifstrictouterreferences
\global\referencefoundfalse
\else
\global\referencefoundtrue % no checking done
\fi
\else
\ifcsname\r!cross\currentfullreference\endcsname
\global\referencefoundtrue
\else
\dodocheckouterreference
\fi
\fi
\fi
\doifpredefinedreferenceelse{\global\referencefoundfalse}\donothing}
\endTEX
\beginETEX \ifcsname
\def\dodocheckouterreference
{\ifcsname\specialREFidentifier\currentfullreference\endcsname
\@EA\@EA\@EA\splitofffullreference\@EA\@EA\@EA % 1 level
{\csname\specialREFidentifier\currentfullreference\endcsname}%
\docheckouterreference
\else\ifstrictouterreferences
\global\referencefoundfalse
\else
% already \global\referencefoundtrue % no checking done
\fi\fi}
\def\docheckouterreference
{\let\referenceprefix\empty
\let\unharmedreferenceprefix\empty
\xdef\predefinedreference
{\currentouterreference::\currentinnerreference}%
\ifx\innerreference\empty
\global\referencefoundtrue % no checking done
\else
\ifcsname\r!cross\currentouterreference::\endcsname
\ifcsname\r!cross\currentfullreference\endcsname
\global\referencefoundtrue
\else
\dodocheckouterreference
\fi
\else
\ifstrictouterreferences
\global\referencefoundfalse
\else
\global\referencefoundtrue % no checking done
\fi
\fi
\fi
\doifpredefinedreferenceelse{\global\referencefoundfalse}\donothing}
\endETEX
%D Special references are only tested when some test routine is
%D defined.
\def\docheckspecialreference
{\let\referenceprefix\empty
\let\unharmedreferenceprefix\empty
\xdef\predefinedreference
{\currentreferencespecial::\currentreferenceoperation}%
\executeifdefined{\s!do:\v!test:\currentreferencespecial}%
{\global\referencefoundtrue\gobbletwoarguments}%
{\global\referencefoundtrue}{\global\referencefoundfalse}%
\doifpredefinedreferenceelse{\global\referencefoundfalse}\donothing}
%D An unknown reference is reported on the screen, in the log
%D file and, when enabled, in the left margin of the text.
\def\reportreferenceerror#1#2%
{\bgroup
\the\everyreference % cleanup : etc in french
\ifvoorlopig\ifinpagebody\else
\doifsomething{#2}
{\inleft
{\infofont
\scratchdimen\leftmarginwidth
\advance\scratchdimen -2em
\doboundtext{#2}\scratchdimen{..}->}}%
\fi\fi
\doifpredefinedreferenceelse
\donothing
{\predefinereference
\showmessage\m!references{#1}{[\unharmedreferenceprefix][#2]}}%
\egroup}
\def\unknownreference{\reportreferenceerror1}
\def\illegalreference{\reportreferenceerror4}
%D Although not actually needed, we default the unharmed
%D reference prefix to the normal one.
\def\unharmedreferenceprefix{\referenceprefix}
%D When a reference is not found, we typeset a placeholder
%D (two glyphs are often enough to represent the reference
%D text).
\def\dummyreference{{\tttf ??}}
%D To prevent repetitive messages concerning a reference
%D being defined, we set such an unknown reference to an empty
%D one after the first encounter.
\let\predefinedreference\s!unknown
% \def\predefinereference
% {\setgvalue{\r!cross\predefinedreference}{\rt!cross{}{}{}{}}%
% \setgvalue{\r!cross\unharmedreferenceprefix\predefinedreference}{\rt!cross{}{}{}{}}}
\def\dummypredefinedreference{\r!cross{}{}{}{}}
\def\predefinereference
{\global\@EA\let\csname\r!cross\predefinedreference \endcsname\dummypredefinedreference
\global\@EA\let\csname\r!cross\unharmedreferenceprefix\endcsname\dummypredefinedreference}
%D Testing on existance then becomes:
% \def\checkpredefinedreference#1#2#3#4% #3 can expand tricky
% {{#1}{#2}{#4}}
%
% \def\doifpredefinedreferenceelse#1#2% \referenceprefix added
% {\bgroup
% \let\rt!cross\checkpredefinedreference
% \doifelse{\getvalue{\r!cross\referenceprefix\predefinedreference}}{{}{}{}}
% {\egroup#1}{\egroup#2}}
\def\doifpredefinedreferenceelse % \referenceprefix added
{\@EA\ifx\csname\r!cross\referenceprefix\predefinedreference\endcsname\dummypredefinedreference
\expandafter\firstoftwoarguments
\else
\expandafter\secondoftwoarguments
\fi}
%D Sometimes we want to temporary put a reference out of
%D order. An example can be found in the menu macros.
%D
%D \starttyping
%D \doifreferencepermittedelse{reference}{set}{true}{false}
%D \stoptyping
%D
%D The second argument can be a comma seperated list.
% this will be replaced by a more general mechanis
% \def\doifreferencepermittedelse#1#2#3#4% ref set found notfound
% {\doifreferencefoundelse{#1}
% {\ifx\currentinnerreference\empty
% \ifx\currentouterreference\empty
% #3%
% \else
% \doifinstringelse{\currentouterreference::}{#2}{#4}{#3}%
% \fi
% \else\ifx\currentouterreference\empty
% \doifinstringelse{\currentinnerreference}{#2}{#4}{#3}%
% \else
% \doifinstringelse{\currentouterreference::\currentinnerreference}{#2}{#4}{#3}%
% \fi\fi}
% {#4\unknownreference{#1}}}
\let\permittedreferences\empty
\def\doifreferencepermittedelse#1#2#3% ref found notfound
{\doifreferencefoundelse{#1}
{\donetrue
\ifx\permittedreferences\empty \else
\docheckifreferencepermitted{#1}%
\fi
\ifdone#2\else#3\fi}
{#3\unknownreference{#1}}}
\def\docheckifreferencepermitted#1%
{\ifx\currentinnerreference\empty
\ifx\currentouterreference\empty \else
\doifinstring{\currentouterreference::}\permittedreferences\donefalse
\fi
\else\ifx\currentouterreference\empty
\doifinstring{\currentinnerreference}\permittedreferences\donefalse
\else
\doifinstring{\currentouterreference::\currentinnerreference}\permittedreferences\donefalse
\fi\fi}
%D Apart from cross references supplied by the user, \CONTEXT\
%D generates cross references itself. Most of them are not
%D saved as a reference, but stored with their source, for
%D instance a list or an index entry. Such automatically
%D generated, for the user invisible, references are called
%D {\em internal references}. The user supplied ones are
%D labeled as {\em external references}.
%D
%D A second important characteristic is that when we want to
%D support different backends (viewers), we need to support
%D named destinations as well as page numbers. I invite readers
%D to take a glance at the special driver modules to understand
%D the fine points of this. As a result we will deal with {\em
%D locations} as well as {\em real page numbers}. We explictly
%D call this pagenumber a real one, because it is independant
%D of the page numbering scheme used in the document.
%D
%D One of the reasons for \CONTEXT\ being the first \TEX\ base
%D macropackage to support sophisticated interactive \PDF\
%D files, lays in the mere fact that real page numbers are
%D available in most two pass data, like references, list data
%D and index entries.
%D
%D We will speak of \type{thisis...} when we are marking a
%D location, and \type{goto...} when we point to such a
%D location. The latter one can be seen as a hyperlink to the
%D former one. In the next macros one we use constructs like:
%D
%D \starttyping
%D \dostart...
%D \dostop...
%D \stoptyping
%D
%D Such macros are used to invoke the relevant specials from
%D the special driver modules (see \type{spec-ini}). The flag
%D \type{\iflocation} signals if we're in interactive mode.
\def\thisisdestination#1% destination
{\iflocation \ifusepagedestinations \else
\dostartthisislocation{#1}\dostopthisislocation
\fi \fi}
\def\thisisrealpage#1% pagenumber
{\iflocation
\dostartthisisrealpage{#1}\dostopthisisrealpage
\fi}
%D The previous tho macros were easy ones, opposite to their
%D counterparts. A common component in these is:
%D
%D \starttyping
%D \dostartgoto
%D \data {..}
%D \start {..}
%D \stop {..}
%D \dostopgoto
%D \stoptyping
%D
%D Here data can be whatever needs highlighting, e.g. {\em
%D figure 2.4}, and the start and stop entries handle the
%D specials. The two \DIMENSIONS\ \type{\buttonwidth} and
%D \type{\buttonheight} have to be set when handling the
%D data~(\type{#2}).
\ifx\buttonheight\undefined \newdimen\buttonheight \fi
\ifx\buttonwidth \undefined \newdimen\buttonwidth \fi
\def\gotodestination#1#2#3#4#5% url file destination page data
{\iflocation
\ifusepagedestinations
\gotorealpage{#1}{#2}{#4}{#5}%
\else
\dostartgoto
\data
{#5}%
\start
\the\everyreference % we are (have to be) grouped !
\dostartgotolocation\buttonwidth\buttonheight{#1}{#2}{#3}{#4}%
\stop
\dostopgotolocation
\dostopgoto
\fi
\else
{#5}%
\fi}
\def\gotorealpage#1#2#3#4% url file page data
{\iflocation
\dostartgoto
\data
{#4}%
\start
\dostartgotorealpage\buttonwidth\buttonheight{#1}{#2}{#3}%
\stop
\dostopgotorealpage
\dostopgoto
\else
{#4}%
\fi}
%D \macros
%D {setreferencefilename}
%D
%D This command can be used in the special drivers to
%D uppercase filenames. This is needed when one wants to
%D produce \CDROM's conforming to ISO9660. We consider is the
%D savest to enable this feature by default. We cannot handle
%D uppercase here, since the suffix is handled in the special
%D driver. Conversion is taken care of by:
%D
%D \starttyping
%D \setreferencefilename somefilename\to\SomeFileName
%D \stoptyping
% \def\setreferencefilename#1\to#2%
% {\doifelse{\@@converteerfile}{\v!ja} % boolean is sneller
% {\uppercasestring#1\to#2}
% {\edef#2{#1}}}
\chardef\referencefilecase=0
\def\setreferencefilename#1\to#2%
{\ifcase\referencefilecase
\edef#2{#1}%
\or
\uppercasestring#1\to#2%
\or
\lowercasestring#1\to#2%
\else
\edef#2{#1}%
\fi}
%D Internal references can best be set using the next few
%D macros. Setting such references to unique values is
%D completely up to the macros that call them.
%D
%D \starttyping
%D \thisissomeinternal{tag}{identifier}
%D \gotosomeinternal {tag}{identifier}{pagenumber}{text}
%D \stoptyping
\def\thisissomeinternal#1#2% tag reference
{\doifsomething{#2}{\thisisdestination{#1:#2}}}
\def\gotosomeinternal#1#2% #3#4
{\gotodestination\empty\empty{#1:#2}}
%D An automatic mechanism is provided too:
%D
%D \starttyping
%D \thisisnextinternal{tag}
%D \gotonextinternal {tag}{number}{pagenumber}{text}
%D \stoptyping
%D
%D The first macro increments a counter. The value of this
%D counter is available in the macro \type{\nextinternalreference}
%D and should be saved somewhere (for instance in a file) for
%D future reference. The second argument of
%D \type {\gotonextinternal} takes such a saved number. One can
%D turn on tracing these references, in which case the
%D references are a bit more verbose.
\newcount\locationcount
\newif\iftraceinternalreferences
\newif\ifinternalnamedreferences \internalnamedreferencestrue
\def\nextinternalreference%
{\the\locationcount}
% \def\thisisnextinternal#1%
% {\global\advance\locationcount \plusone
% \thisisdestination{\s!aut\iftraceinternalreferences:#1\fi:\nextinternalreference}}
%
% \def\gotonextinternal#1#2% #3#4
% {\gotodestination{}{}{\s!aut\iftraceinternalreferences:#1\fi:#2}}
\def\thisisnextinternal#1%
{\global\advance\locationcount \plusone
\ifinternalnamedreferences
\thisisdestination{\s!aut\iftraceinternalreferences:#1\fi:\nextinternalreference}%
\fi}
\def\gotonextinternal#1#2#3#4%
{\ifinternalnamedreferences
\gotodestination\empty\empty{\s!aut\iftraceinternalreferences:#1\fi:#2}{#3}{#4}%
\else
\gotorealpage\empty\empty{#3}{#4}%
\fi}
%D We already went through a lot of problems to sort out what
%D kind of reference we're dealing with. Sorting out the user
%D supplied cross references (show/goto this or that) as well
%D as user supplied system references (invoke this or that) is
%D already taken care of in the test routine, but we still have
%D to direct the request to the right (first) routine.
\def\gotolocation% #1#2%
{\ifx\currentreferencespecial\empty
\ifx\currentouterreference\empty
\ifnum\currentreferencetype<2
\@EA\@EAEAEA\@EA\gotoinnerlocation
\else
\@EA\@EAEAEA\@EA\gotosystemlocation
\fi
\else
\@EAEAEA\gotoouterlocation
\fi
\else
\@EA\gotospeciallocation
\fi} % {#1}{#2}
%D An inner reference refers to some place in the document
%D itself.
\def\gotoinnerlocation#1% #2%
{\gotodestination\empty\empty
{\referenceprefix\currentinnerreference}\currentrealreference} % {#2}
%D The outer location refers to another document, specified as
%D file or \URL.
\def\gotoouterlocation#1#2% % page checken!
{\bgroup
\let\referenceprefix\empty
\setouterlocation\currentouterreference
\ifx\currentinnerreference\empty
\gotorealpage
\otherURL\otherfile1{#2}%
\else
\gotodestination
\otherURL\otherfile\currentinnerreference\currentrealreference{#2}%
\fi
\egroup}
%D Special locations are those that are accessed by saying
%D things like:
%D
%D \starttyping
%D \goto{calculate total}[JS(summarize{10,23,56}]
%D \stoptyping
%D
%D After several intermediate steps this finally arrives at
%D the next macro and expands into (simplified):
%D
%D \starttyping
%D \gotoJSlocation{total{summarize{10,23,56}}}{calculate total}
%D \stoptyping
%D
%D The first argument is the full reference, the second one
%D is the text, in some kind of manipulated form. In practice
%D we split references, so we get:
%D
%D \starttyping
%D \gotoJSlocation{summarize{10,23,56}}{calculate}
%D \gotoJSlocation{summarize{10,23,56}}{total}
%D \stoptyping
%D
%D where \type{calculate} and \type{total} are colored, boxed
%D or whatever \type{\goto} is told to do.
%D
%D The macro \type{\gotoJSlocation} can use \type
%D {\currentreferenceoperation} (in our example
%D \type{summarize}) and \type{\currentreference} (here
%D being \type {10,23,56}) to perform its task.
\def\gotospeciallocation
{\executeifdefined{goto\currentreferencespecial location}\gobbleoneargument}
%D Such special macros can be defined by:
\def\definespeciallocation#1%
{\setvalue{goto#1location}}
%D The associated test is to be defined by:
\def\definespecialtest#1%
{\setvalue{\s!do:\v!test:#1}}
%D This \type{\def} alike macro is to be used as:
%D
%D \starttyping
%D \definespeciallocation{JS}#1#2{... #1 ... #2 ...}
%D \stoptyping
%D
%D In module \type {java-ini} one can see that \type
%D {\gotoJSlocation} looks much like the previous goto
%D definitions.
%D A system location is not always a location, but for the
%D consistency we also consider actions as such.
\def\gotosystemlocation
{\csname\r!syst\the\currentreferencetype\endcsname}
\def\definesystemreferencehandler#1#2%
{\setgvalue{\r!syst\the#1}{#2}}
%D In this module we define three system references: one for
%D handling navigational, viewer specific, commands, another
%D for jumping to special pages, like the first or last one,
%D and a third reference for linking tree like lists, like
%D tables of contents. The latter two adapt themselves to the
%D current state.
\definesystemreferencehandler \rt!exec \handleexecreference
\definesystemreferencehandler \rt!page \handlepagereference
\definesystemreferencehandler \rt!list \handlelistreference
\def\handleexecreference#1%
{\checkexecutecommand\currentdatareference\currentreferencearguments
\executecommand\currentdatareference\currentreferencearguments}
\def\handlepagereference#1%
{\gotorealpage\empty\empty\currentdatareference}
\def\handlelistreference#1% is deze nog echt nodig?
{\gotodestination\empty\empty\currentdatareference{\getvalue{\currentdatareference}}}
%D \macros
%D {setexecutecommandcheck}
%D
%D In case a command action needs to do some checking in
%D advance, one can assign an check function by:
%D
%D \starttyping
%D \setexecutecommandcheck{startsound}\checksoundtrack
%D \stoptyping
\def\setexecutecommandcheck#1#2% #2 permits \first \second
{\setvalue{\s!do:\s!do:#1}{#2}}
\beginETEX
\def\checkexecutecommand#1#2% evt geen #1 en #2
{\ifx#2\empty \else \ifcsname\s!do:\s!do:#1\endcsname
\@EA\let\@EA\docheckexecutecommand\csname\s!do:\s!do:#1\endcsname
\rawprocesscommalist[#2]\docheckexecutecommand
\fi \fi }
\endETEX
\beginTEX
\def\checkexecutecommand#1#2% evt geen #1 en #2
{\ifx#2\empty \else \@EA\ifx\csname\s!do:\s!do:#1\endcsname\relax \else
\@EA\let\@EA\docheckexecutecommand\csname\s!do:\s!do:#1\endcsname
\rawprocesscommalist[#2]\docheckexecutecommand
\fi \fi }
\endTEX
%D Command references (in dutch, english, german of
%D whatever interface language) are translated into a bit
%D shorter reference (\type{close}) and passed to the
%D special driver (using \type{\executecommand}).
% better: [action(name)] and \definereference[name][action(name)]
\setglobalsystemreference \rt!exec \v!CloseDocument {close}
\setglobalsystemreference \rt!exec \v!ExitViewer {exit}
\setglobalsystemreference \rt!exec \v!FirstPage {first}
\setglobalsystemreference \rt!exec \v!LastPage {last}
\setglobalsystemreference \rt!exec \v!NextJump {forward}
\setglobalsystemreference \rt!exec \v!NextPage {next}
\setglobalsystemreference \rt!exec \v!PauseMovie {pausemovie}
\setglobalsystemreference \rt!exec \v!PauseSound {pausesound}
\setglobalsystemreference \rt!exec \v!PauseRendering {pauserendering}
\setglobalsystemreference \rt!exec \v!PreviousJump {backward}
\setglobalsystemreference \rt!exec \v!PreviousPage {previous}
\setglobalsystemreference \rt!exec \v!PrintDocument {print}
\setglobalsystemreference \rt!exec \v!SaveForm {exportform}
\setglobalsystemreference \rt!exec \v!LoadForm {importform}
\setglobalsystemreference \rt!exec \v!ResetForm {resetform}
\setglobalsystemreference \rt!exec \v!ResumeMovie {resumemovie}
\setglobalsystemreference \rt!exec \v!ResumeSound {resumesound}
\setglobalsystemreference \rt!exec \v!ResumeRendering {resumerendering}
\setglobalsystemreference \rt!exec \v!SaveDocument {save}
\setglobalsystemreference \rt!exec \v!SaveNamedDocument{savenamed}
\setglobalsystemreference \rt!exec \v!OpenNamedDocument{opennamed}
\setglobalsystemreference \rt!exec \v!SearchDocument {search}
\setglobalsystemreference \rt!exec \v!SearchAgain {searchagain}
\setglobalsystemreference \rt!exec \v!StartMovie {startmovie}
\setglobalsystemreference \rt!exec \v!StartSound {startsound}
\setglobalsystemreference \rt!exec \v!StartRendering {startrendering}
\setglobalsystemreference \rt!exec \v!StopMovie {stopmovie}
\setglobalsystemreference \rt!exec \v!StopSound {stopsound}
\setglobalsystemreference \rt!exec \v!StopRendering {stoprendering}
\setglobalsystemreference \rt!exec \v!SubmitForm {submitform}
\setglobalsystemreference \rt!exec \v!SwapViewer {swap}
\setglobalsystemreference \rt!exec \v!ViewerHelp {help}
\setglobalsystemreference \rt!exec \v!HideField {hide}
\setglobalsystemreference \rt!exec \v!ShowField {show}
\setglobalsystemreference \rt!exec \v!GotoPage {gotopage}
\setglobalsystemreference \rt!exec \v!GotoPage {gotopage}
\setglobalsystemreference \rt!exec \v!Query {query}
\setglobalsystemreference \rt!exec \v!QueryAgain {queryagain}
\setglobalsystemreference \rt!exec \v!FitWidth {fitwidth}
\setglobalsystemreference \rt!exec \v!FitHeight {fitheight}
%D Executing the command looks alike the previous goto macros.
\def\executecommand#1#2#3%
{\iflocation
\dostartgoto
\data
{#3}%
\start
\dostartexecutecommand\buttonwidth\buttonheight{#1}{#2}%
\stop
\dostopexecutecommand
\dostopgoto
\else
{#3}%
\fi}
%D We could have done without the short tags and thereby saving
%D some tokens, but the current approach leaves room for future
%D extensions.
%D It is possible to disable the writing of references to the
%D utility file by setting:
\newif\ifreferencing \referencingtrue
%D One can also activate an automatic prefix mechanism. By
%D setting the \type{\prefix} variable to \type{+}, the prefix
%D is incremented, when set to \type{-} or empty, the prefix is
%D reset. Other values become the prefix.
\newcount\prefixcounter
%D These settings are accomplished by:
%D
%D \showsetup{\y!setupreferencing}
%D
%D In interactive documents verbose references don't always
%D make sense (what is a page number in an unnumbered
%D document). By setting the \type{interaction} variable, one
%D can influences the way interactive references are set.
% \newif\ifreferencestrut % some day an option
\def\setupreferencing
{\dosingleargument\dosetupreferencing}
\def\dosetupreferencing[#1]%
{\getparameters
[\??rf]
[\c!prefix=\s!unknown,#1]%
\processaction
[\@@rfstate]
[ \v!stop=>\referencingfalse,
\v!start=>\referencingtrue]%
\processaction
[\@@rfinteraction]
[ \v!all=>\let\dowantedreference\docompletereference,
\v!label=>\let\dowantedreference\dolabelonlyreference,
\v!text=>\let\dowantedreference\dotextonlyreference,
\v!symbol=>\let\dowantedreference\dosymbolreference]%
\chardef\autocrossfilereferences\zerocount
\processaction
[\@@rfautofile]
[ \v!yes=>\chardef\autocrossfilereferences\plusone,
\v!page=>\chardef\autocrossfilereferences\plustwo]%
\chardef\referencefilecase\zerocount
\processaction[\@@rfconvertfile]
[ \v!yes=>\chardef\referencefilecase\plusone,
\v!big=>\chardef\referencefilecase\plusone,
\v!small=>\chardef\referencefilecase\plustwo]%
%\doifelse\@@rfstrut\v!yes % some day an option
% \referencetruttrue\referencestrutfalse
\setupreferenceprefix[\@@rfprefix]%
\doifelse\@@rfglobal\v!yes
{\settrue \autoglobalfilereferences}
{\setfalse\autoglobalfilereferences}}
\def\incrementreferenceprefix{+}
\def\decrementreferenceprefix{-}
\def\setupreferenceprefix[#1]%
{\edef\@@rfprefix{#1}%
\ifx\@@rfprefix\empty
\let\referenceprefix\empty
\else\ifx\@@rfprefix\incrementreferenceprefix
\advance\prefixcounter \plusone % should be global
\edef\referenceprefix{\the\prefixcounter:}%
\let\@@rfprefix\s!unknown
\else\ifx\@@rfprefix\decrementreferenceprefix
\let\referenceprefix\empty
\let\@@rfprefix\s!unknown
\else\ifx\@@rfprefix\s!unknown
% forget about it
\else
\edef\referenceprefix{\@@rfprefix:}%
\fi\fi\fi\fi}
%D \macros
%D {handlereferenceactions,
%D collectreferenceactions}
%D
%D Sometimes we need to pass the actions connected to
%D references to variables instead of rectangular areas on
%D which one can click. The next macro collects the actions
%D and passes them to a handle. This is a rather dreadfull
%D hack!
%D
%D \starttyping
%D \handlereferenceactions{references}\handle
%D \stoptyping
%D
%D So, \type {\handle} does the final job, which in for
%D instance the \PDF\ drivers comes down to doing something
%D with \type {\lastPDFaction}.
\newif\ifcollectreferenceactions
\def\handlereferenceactions#1#2%
{\doifsomething{#1}
{\bgroup
\collectreferenceactionstrue
\@EA\doifreferencefoundelse\@EA{#1}
{\gotolocation{#1}{}\ifsecondaryreference\else#2\fi}
{\unknownreference{#1}}%
\egroup}}
%D The most straightforward way of retrieving references is
%D using \type{\ref}. Consider the reference:
%D
%D \startbuffer
%D \reference[my ref]{{Look}{Here}{I am}}
%D \stopbuffer
%D
%D \typebuffer
%D
%D \getbuffer
%D
%D We can ask for upto five reference components:
%D
%D \startbuffer
%D user page reference: \ref[p][my ref]
%D text reference: \ref[t][my ref]
%D real page reference: \ref[r][my ref]
%D sub text reference: \ref[s][my ref]
%D extra text reference: \ref[e][my ref]
%D \stopbuffer
%D
%D \typebuffer
%D
%D And get back:
%D
%D \startlines
%D \getbuffer
%D \stoplines
\def\ref{\dodoubleargument\doref}
\def\reftypep{\currentpagereference}
\def\reftypet{\currenttextreference}
\def\reftyper{\currentrealreference}
\def\reftypes{\currentsubtextreference}
\def\reftypee{\currentsubsubtextreference}
\def\doref[#1][#2]%
{\ifsecondargument
\doifreferencefoundelse{#2}
{\doifundefinedelse{reftype#1}{\reftypep}{\getvalue{reftype#1}}}
{\unknownreference{#2}\dummyreference}%
\else
\dummyreference
\fi}
%D We can typeset a reference using \type{\in}, \type{\at} and
%D \type{\about} and goto specific locations using
%D \type{\goto}. The last one does not make that much sense in
%D a paper document. To complicate things, \PLAIN\ \TEX\ also
%D implements an \type {\in} but fortunately that one only
%D makes sense in math mode.
%D --- VANAF HIER NOG VERENGELSEN ---
%\let\donormalin =\in
%\let\donormalover=\over % about/oppassen beter nederlands dan engels!
%
%\def\in%
% {\ifmmode
% \expandafter\donormalin
% \else
% \expandafter\doinatreference\expandafter\currenttextreference
% \fi}
% we need to bypass math tokens
% \let\normalover \over
\definecommand in {\doinatreference\currenttextreference}
\definecommand at {\doinatreference\currentpagereference}
\definecommand about {\dospecialabout}
\definecommand from {\dospecialfrom}
\definecommand over {\dospecialabout} % needed here, else math problems
\unexpanded\def\dospecialabout[#1]%
{\dontleavehmode
\bgroup
\def\thecurrentsubtextreference
{\limitatetext\currentsubtextreference\@@rfwidth\unknown}%
%\leaveoutervmode % no
\@@rfleft
\doifreferencefoundelse{#1}
{\let\crlf\space
\let\\\space
\let\dogotofixed\dogotospace
\dogotospace{\thecurrentsubtextreference}[#1]}
{\unknownreference{#1}\dummyreference}%
\@@rfright
\referentieinfo{<}{#1}%
\egroup}
%D Typesetting the reference is a bit more complicated than one
%D would at first sight expect. This is due to the fact that we
%D distinguish three (five) alternative calls:
%D
%D \placefigure
%D [here][three calls]
%D {Three alternatives reference calls.}
%D {\startcombination[1*3]
%D {\framed{\type{ \in }}} {a}
%D {\framed{\type{ \at }}} {b}
%D {\framed{\type{\goto}}} {c}
%D \stopcombination}
%D
%D \startbuffer
%D \in figure[fig:three calls]
%D \in{figure}[fig:three calls]
%D \in figure a[fig:three calls]
%D \in{figure}{a}[fig:three calls]
%D figure~\in[fig:three calls]
%D \stopbuffer
%D
%D \typebuffer
%D
%D This turns up as:
%D
%D \startlines
%D \getbuffer
%D \stoplines
%D
%D The dual \type{{}} results in a split reference. In a
%D document meant for paper, one is tempted to use the last
%D (most straightforward) alternative. When a document is also
%D meant voor electronic distribution, the former alternatives
%D have preference, because everything between the \type{\in}
%D and~\type{[} becomes active (and when asked for, typeset
%D in a different color and typeface).
\def\doinatreference#1%
{\doifnextcharelse[% {[}
{\dodoinatreference{#1}{}}
{\dodoinatreference{#1}}}
\def\dodoinatreference#1%
{\def\dododoinatreference{\dodododoinatreference{#1}}%
\futurelet\next\dododoinatreference}
% overloaded
%
% \def\dodododoinatreference#1#2#3[#4]%
% {\ifx\next\bgroup
% \dododododoinatreference{#1\ignorespaces#3}{#2}[#4]%
% \else
% \dododododoinatreference{#1}{#2#3}[#4]%
% \fi}
%D We arrived at the last step. Before we do the typesetting,
%D we forget all previous (paragraph bound) settings and make
%D sure that we remain in horizontal mode. Next we choose
%D among the several representations.
% overloaded
%
% \def\dododododoinatreference#1#2[#3]%
% {\dontleavehmode
% \bgroup
% \forgetall
% %\leaveoutervmode
% \doifreferencefoundelse{#3}
% {\bgroup
% \let\ignorespaces\empty % rather dirty but ok
% \doifelsenothing{#1}
% {\egroup\dosymbolreference{#1}{#2}[#3]}
% {\egroup\dowantedreference{#1}{#2}[#3]}}
% {\dounknownreference{#1}{#2}[#3]}%
% \referentieinfo{<}{#3}%
% \egroup}
%D The previously discussed setup macro lets us specify the
%D representation of references. A symbol reference does not
%D show the specific data, like the number of a figure, but
%D shows one of: \hbox {$^\goforwardcharacter$
%D $^\gobackwardcharacter$ $^\gonowherecharacter$}, depending
%D on the direction to go.
\def\dosymbolreference#1#2[#3]%
{\bgroup
\setupsymbolset[\@@iasymbolset]%
\removelastskip
\ifx\currentreferencespecial\empty
\ifx\currentouterreference\empty
\ifnum0\currentrealreference=\zerocount
\ifhmode\strut\high{\symbol[\v!nowhere]}\fi
\else\ifnum0\currentrealreference>\realpageno
\dodosymbolreference{#2}{\high{\symbol[\v!next]}}%
\else\ifnum0\currentrealreference<\realpageno
\dodosymbolreference{#2}{\high{\symbol[\v!previous]}}%
\else
\ifhmode\strut\high{\symbol[\v!nowhere]}\fi
\fi\fi\fi
\else
\gotoouterlocation{#3}{\showlocation{\high{\symbol[\v!somewhere]}}}%
\fi
\else
\gotospeciallocation{#3}{\showlocation{\high{\symbol[\v!somewhere]}}}%
\fi
\egroup}
\def\dodosymbolreference#1#2%
{#1\hbox{\gotorealpage\empty\empty\currentrealreference
{\dolocationattributes\??ia\c!style\c!color{#2}}}}
%D The other alternatives just conform their names: only the
%D label, only the text, or the label and the text.
\def\dounknownreference#1#2[#3]%
{\unknownreference{#3}\dotextprefix{#2}\dummyreference}%
% \def\docompletereference#1#2[#3]%
% {\doifsomespaceelse{#2}
% {\doifsomething{#2}{\dogotospace{#2}[#3]~}\dogotofixed{#1}[#3]}
% {\dogotofixed{\dotextprefix{#2}#1}[#3]}}
%
% better:
% \def\docompletereference#1#2[#3]%
% {\iflocationsplit
% \doifsomespaceelse{#2}
% {\dogotospace{\dotextprefix{#2}#1}[#3]}
% {\dogotofixed{\dotextprefix{#2}#1}[#3]}%
% \else
% \dogotofixed{\dotextprefix{#2}#1}[#3]%
% \fi}
%
% more efficient
\def\docompletereference#1#2[#3]%
{\iflocationsplit
\doifsomespaceelse{#2}\dogotospace\dogotofixed{\dotextprefix{#2}#1}[#3]%
\else
\dogotofixed{\dotextprefix{#2}#1}[#3]%
\fi}
\def\dolabelonlyreference#1#2[#3]%
{\doifsomespaceelse{#2}
{\doifsomething{#2}{\dogotospace{#2}[#3]}}
{\dogotofixed{\dotextprefix{#2}}[#3]}}
\def\dotextonlyreference#1#2[#3]%
{\dotextprefix{#2}\dogotofixed{#1}[#3]}
\let\dowantedreference=\docompletereference
%D \macros
%D {definereferenceformat}
%D
%D The next few macros were made for for David Arnold and Taco
%D Hoekwater. They can be used for predefining reference
%D texts, and thereby stimulate efficiency.
%D
%D [more documentation will be added]
%D
%D \starttyping
%D \definereferenceformat[informula] [left=(,right=),text=formula]
%D \definereferenceformat[informulas] [left=(,right=),text=formulas]
%D \definereferenceformat[andformula] [left=(,right=),text=and]
%D \definereferenceformat[andformulas][left=(,right=),text=and]
%D
%D \informula [b] and \informula [for:c]
%D the \informula {formulas}[b] \informula {and} [for:c]
%D the \informulas {formulas}[b] \informula {and} [for:c]
%D the \informulas [b] \informula {en} [for:c]
%D the \informulas [b] \andformula [for:c]
%D \stoptyping
%D
%D Instead of a text, one can specify a label, which should
%D be defined with \type {\setuplabeltext}.
\def\definereferenceformat%
{\dodoubleargument\dodefinereferenceformat}
\def\dodefinereferenceformat[#1][#2]%
{\iffirstargument
\getparameters[\??rf#1]
[\c!left=, % of the number
\c!right=, % of the number
\c!text=, % before the number
\c!label=, % can be {left}{right}
\c!command=\in,
#2]%
\unexpanded\setvalue{#1}%
{\dontleavehmode\doexecutereferenceformat{#1}}%
\fi}
\def\noexecutelabelreferenceformat#1%
{\doifvaluesomething{\??rf#1\c!text}
{\gdef\textofreference{\csname\??rf#1\c!text\endcsname}}%
\csname\??rf#1\c!command\endcsname}
\def\doexecutelabelreferenceformat#1%
{\csname\??rf#1\c!command\endcsname
{\leftlabeltext {\csname\??rf#1\c!label\endcsname}}%
{\rightlabeltext{\csname\??rf#1\c!label\endcsname}}}
\def\doexecutereferenceformat#1%
{\gdef\leftofreference {\csname\??rf#1\c!left \endcsname}%
\gdef\rightofreference{\csname\??rf#1\c!right\endcsname}%
\global\let\textofreference\empty % otherwise ~ added
\doifelsevaluenothing{\??rf#1\c!label}
\noexecutelabelreferenceformat\doexecutelabelreferenceformat{#1}}
\let\leftofreference \relax
\let\rightofreference\relax
\let\textofreference \relax
\def\dodododoinatreference#1#2#3[#4]% \removeunwantedspaces added june 2004
{\ifx\next\bgroup % but removed later, fails on metafun
\dododododoinatreference
% fails on metafun {\leftofreference#1\ignorespaces#3\removeunwantedspaces\rightofreference}{#2}[#4]%
{\leftofreference#1\ignorespaces#3\rightofreference}{#2}[#4]%
\else
\dododododoinatreference
{\leftofreference#1\rightofreference}{#2#3}[#4]%
\fi}
% \def\dododododoinatreference#1#2[#3]%
% {\bgroup
% \forgetall
% \postponefootnotes
% \leaveoutervmode
% \doifreferencefoundelse{#3}
% {\bgroup
% \let\ignorespaces \empty % rather dirty trick, but ok
% \let\leftofreference \empty % the same, again ok
% \let\rightofreference\empty % and once more
% \def\textofreference {#2}% % temporary value
% \ifx\textofreference\empty % simple expansion
% %\doifelsenothing{#1}
% % {\egroup\dosymbolreference{#1}{\textofreference}[#3]}
% % {\egroup\dowantedreference{#1}{\textofreference}[#3]}%
% \doifelsenothing{#1}%
% {\egroup\dosymbolreference}%
% {\egroup\dowantedreference}%
% {#1}{\textofreference}[#3]%
% \else
% %\doifelsenothing{#1}
% % {\egroup\dosymbolreference{#1}{#2}[#3]}
% % {\egroup\dowantedreference{#1}{#2}[#3]}%
% \doifelsenothing{#1}%
% {\egroup\dosymbolreference}%
% {\egroup\dowantedreference}%
% {#1}{#2}[#3]%
% \fi}
% {\dounknownreference{#1}{#2}[#3]}%
% \referentieinfo<{#3}%
% \global\let\leftofreference \empty
% \global\let\rightofreference\empty
% \global\let\textofreference \empty
% \egroup}
\def\dododododoinatreference#1#2[#3]%
{\dontleavehmode % replaces \leaveoutervmode
\bgroup
\forgetall
\postponefootnotes
%\leaveoutervmode % replaced by \dontleavehmode
\doifreferencefoundelse{#3}
{\bgroup
\let\ignorespaces \empty % rather dirty trick, but ok
\let\leftofreference \empty % the same, again ok
\let\rightofreference\empty % and once more
\def\textofreference {#2}% % temporary value
\ifx\textofreference\empty % simple expansion
%\doifelsenothing{#1}
% {\egroup\dosymbolreference{#1}{\textofreference}[#3]}
% {\egroup\dowantedreference{#1}{\textofreference}[#3]}%
\doifelsenothing{#1}%
{\egroup\dosymbolreference}%
{\egroup\dowantedreference}%
{#1}{\textofreference}[#3]%
\else
%\doifelsenothing{#1}
% {\egroup\dosymbolreference{#1}{#2}[#3]}
% {\egroup\dowantedreference{#1}{#2}[#3]}%
\doifelsenothing{#1}%
{\egroup\dosymbolreference}%
{\egroup\dowantedreference}%
{#1}{#2}[#3]%
\fi}
{\dounknownreference{#1}{#2}[#3]}%
\referentieinfo<{#3}%
\global\let\leftofreference \empty
\global\let\rightofreference\empty
\global\let\textofreference \empty
\egroup}
%D In interactive documents going to a specific location is not
%D bound to cross references. The \type{\goto} commands can be
%D used to let users access another part of the document. In
%D this respect, interactive tables of contents and registers
%D can be considered goto's. Because in fact a \type{\goto} is
%D just a reference without reference specific data, the
%D previous macros are implemented using the goto
%D functionality.
%D
%D \showsetup{\y!goto}
%D
%D One important chaacteristic is that the first argument of
%D \type{\goto} (and therefore \type{\at} and \type{\in} is
%D split at spaces. This means that, although hyphenation is
%D prevented, long references can cross line endings.
%\unexpanded\def\naar#1[#2]%
% {\dontleavehmode
% %\leaveoutervmode
% \doifreferencefoundelse{#2}
% {\doifelsenothing{#1}
% {\dosymbolreference{}{}[#2]}
% {\dogotospace{#1}[#2]}}
% {\unknownreference{#2}#1}%
% \referentieinfo{<}{#2}}
\def\dogoto#1[#2]%
{\dontleavehmode
%\leaveoutervmode
\bgroup
\postponefootnotes
\doifreferencefoundelse{#2}
{\doifelsenothing{#1}
{\dosymbolreference{}{}[#2]}
{\dogotospace{#1}[#2]}}
{\unknownreference{#2}#1\relax}% \relax catches lookahead
\egroup
\referentieinfo{<}{#2}}
\unexpanded\def\goto#1#2%
{\dogoto{#1}#2}
\newif\ifsharesimilarreferences \sharesimilarreferencestrue
\newcount\similarreference % 0=noppes 1=create/refer 2,3,..=refer
\def\dogotospace#1[#2]%
{\iflocationsplit
\ifsecondaryreference\setbox0\hbox\fi % due to space insertion
{\let\dogotospace\dogotofixed
\iflocation
\def\processisolatedword##1%
{\ifisolatedwords\ifsharesimilarreferences
\global\advance\similarreference \plusone
\fi\fi
\hbox{\gotolocation{#2}{##1\presetgoto}}}%
\doattributes\??ia\c!style\c!color
{\processisolatedwords{#1}\processisolatedword}%
\else
#1\relax % \relax prevents #1's next macros from gobbling \fi
\fi}%
\else
\iflocation
\doattributes\??ia\c!style\c!color
{\gotolocation{#2}{#1\presetgoto}}%
\else
#1\relax % \relax prevents #1's next macros from gobbling \fi
\fi
\fi
\global\similarreference\zerocount}
\def\dogotofixed#1[#2]%
{{\iflocation
\hbox{\gotolocation{#2}{\doattributes\??ia\c!style\c!color
{#1\presetgoto}}}%
\else
#1%
\fi}}
%D In case the auto split feature is not needed or even not
%D even wanted, \type{\gotobox} can be used.
%D --- NOG IN HANDLEIDING ---
\unexpanded\def\gotobox#1[#2]%
{\dontleavehmode
\bgroup
\locationstrutfalse
%\leaveoutervmode
\doifreferencefoundelse{#2}
{\dogotofixed{#1}[#2]}
{\hbox{\unknownreference{#2}#1}}%
\referentieinfo{<}{#2}%
\egroup}
%D An reference to another document can be specified as a file
%D or as an \URL. Both are handled by the same mechanism and
%D can be issued by saying something like:
%D
%D \starttyping
%D \goto[dictionary::the letter a]
%D \stoptyping
%D
%D The macros that are responsible for handling these
%D references, use the next six variables:
\let\otherlabel = \empty
\let\fileprefix = \empty
\def\otherfile {\jobname}
\let\otherURL = \empty
\let\otherprefix = \empty
\let\dowithdocdes = \empty
%D One can imagine that many references to such a dictionary
%D are made, so in most cases such a document reference in an
%D indirect one.
%D
%D \showsetup{\y!useexternaldocument}
%D
%D For example:
%D
%D \starttyping
%D \useexternaldocument
%D [dictionary][engldict]
%D [The Famous English Dictionary]
%D \stoptyping
%D
%D The next macro implements these relations, and also take
%D care of loading the document specific references.
\def\useexternaldocument%
{\dotripleargument\douseexternaldocument}
\def\douseexternaldocument[#1][#2][#3]%
{\bgroup
\ifsecondargument
\doifelsenothing{#1}
{\douseexternaldocument[#2][#2][#3]}
{\doifelsenothing{#3}
{\douseexternaldocument[#1][#2][#2]}
{\doifsomething{#2}
{\setgvalue{\v!file:::#1}{\doexternaldocument{}{#2}{#3}}% just \do
\doif\@@rfstate\v!start
{\doifparentfileelse{#2}
{\showmessage\m!references{21}{#2}}
{\dodouseexternaldocument{#1}{#2}}}}}}%
\else
\dodouseexternaldocument{#1}{#1}%
\fi
\egroup}
\def\dodouseexternaldocument#1#2%
{\bgroup % prevents wrong loading of \jobname
\def\fileprefix{#1::}%
\let\setglobalcrossreference\setoutercrossreference
\usereferences[#2]%
\egroup % when called nested
\showmessage\m!references{21}{#2}}
%D The \URL\ alternative takes four arguments:
%D
%D \showsetup{\y!useURL}
%D
%D like:
%D
%D \starttyping
%D \useURL
%D [dictionary][http://www.publisher.com/public][engldict]
%D [The Famous English Dictionary]
%D \stoptyping
%D
%D Several specifications are possible:
%D
%D \starttyping
%D \useURL [id] [url] [file] [description]
%D \useURL [id] [url] [file]
%D \useURL [id] [url]
%D \stoptyping
%D
%D This time we don't load the references when no file is
%D specified. This is logical when one keeps in mind that a
%D valid \URL\ can also be a mail address.
\def\useURL
{\bgroup
\protectlabels
\catcode`\#=\@@other\catcode`\%=\@@other\catcode`\/=\@@other
\catcode`\_=\@@other\catcode`\~=\@@other\catcode`\:=\@@other
\dodoubleempty\douseURL}
\def\douseURL[#1][#2]%
{\egroup\doquadrupleempty\dodouseURL[#1][#2]}
\let\useurl\useURL
% \def\dodouseURL[#1][#2][#3][#4]%
% {\iffirstargument
% \iffourthargument\setgvalue{\v!file:::#1}{\doexternaldocument{#2}{#3}{#4}}\else
% \ifthirdargument \setgvalue{\v!file:::#1}{\doexternaldocument{#2}{#3}{\url[#1]}}\else
% \ifsecondargument\setgvalue{\v!file:::#1}{\doexternaldocument{#2}{}{\url[#1]}}\fi\fi\fi
% \fi}
\def\dodouseURL[#1][#2][#3][#4]% to be redone: not too tricky redefs ad reuse
{\iffirstargument
\iffourthargument\setgvalue{\v!file:::#1}{\doexternaldocument{#2}{#3}{#4}}\else
\ifthirdargument \setgvalue{\v!file:::#1}{\doexternalurl {#2}{#3}{#1}}\else
\ifsecondargument\setgvalue{\v!file:::#1}{\doexternalurl {#2}{} {#1}}\fi\fi\fi
\fi}
\def\doexternalurl#1#2#3%
{\bgroup
\doifsomething\@@urstyle{\let\@@iastyle\@@urstyle\let\@@urstyle\empty}%
\doifsomething\@@urcolor{\let\@@iacolor\@@urcolor\let\@@urcolor\empty}%
\doexternaldocument{#1}{#2}{\url[#3]}%
\egroup}
%D \macros
%D {url,setupurl}
%D
%D We also have: \type{\url} for directly calling the
%D description. So we can say:
%D
%D \starttyping
%D \useURL [one] [http://www.test.nl]
%D \useURL [two] [http://www.test.nl] [] [Some Site]
%D
%D \url[one] or \from[two] or \goto{Whatever Site}[URL(two)]
%D \stoptyping
%D
%D An \URL\ can be set up with
%D
%D \showsetup{\y!setupurl}
\def\setupurl
{\dodoubleargument\getparameters[\??ur]}
\unexpanded\def\url[#1]% slow
{\bgroup
\processaction
[\@@uralternative]
[ \v!none=>\chardef\urlsplitmode\zerocount,
\v!both=>\chardef\urlsplitmode\plusone,
\v!after=>\chardef\urlsplitmode\plustwo,
\v!before=>\chardef\urlsplitmode\plusthree]%
\doifelse\@@urspace\v!yes
{\setbetweenisolatedwords{\scratchskip\currentspaceskip\hskip\zeropoint\!!plus.2\scratchskip}}
{\setbetweenisolatedwords\allowbreak}%
\def\doexternaldocument##1##2##3{\hyphenatedurl{##1}}% awful hack
\dostartattributes\??ur\c!style\c!color{}%
\getvalue{\v!file:::#1}%
\dostopattributes
\egroup}
%D This macro is hooked into a support macro, and thereby
%D \URL's break ok, according to the setting of a switch,
%D
%D \startbuffer
%D \useURL
%D [test]
%D [sentence_sentence%sentence#sentence~sentence/sentence//sentence:sentence.sentence]
%D \stopbuffer
%D
%D \typebuffer
%D
%D Such an \URL\ is, depending on the settings, hyphenated as:
%D
%D \getbuffer
%D
%D \startlinecorrection
%D \hbox to \hsize
%D {\hss\en
%D \setupreferencing[urlalternative=both]%
%D \vbox{\hsize.25cm\hbox{\bf both}\prewordbreak\url[test]}%
%D \hss
%D \setupreferencing[urlalternative=before]%
%D \vbox{\hsize.25cm\hbox{\bf before}\prewordbreak\url[test]}%
%D \hss
%D \setupreferencing[urlalternative=after]%
%D \vbox{\hsize.25cm\hbox{\bf after}\prewordbreak\url[test]}%
%D \hss}
%D \stoplinecorrection
%D
%D By setting \type{urlspace=yes} one can get slightly better
%D spacing when using very long \URL's.
%D Many macro definitions ago we called for the auxiliary macro
%D \type {\setouterlocation} and now is the time to define this
%D one.
\newconditional\forceURLlocation
\def\setouterfilelocation#1#2#3%
{\edef\otherURL{#1}%
\edef\otherfile{#2}}%
\def\setouterlocation#1%
{\ifundefined{\v!file:::#1}%
\ifconditional\forceURLlocation
\edef\otherURL{#1}%
\let\otherfile\empty
\else
\let\otherURL\empty
\edef\otherfile{#1}%
\fi
\else
\let\doexternaldocument\setouterfilelocation % will change
\let\doexternalurl \setouterfilelocation % will change
\csname\v!file:::#1\endcsname
\fi
\setfalse\forceURLlocation
\doifparentfileelse\otherfile
{\let\otherURL\empty
\let\otherfile\empty
\global\let\otherlabel\empty
\let\otherprefix\empty}
{\xdef\otherlabel{#1}%
\edef\otherprefix{#1::}}}
%D When defining the external source of information, one can
%D also specify a suitable name (the last argument). This name
%D can be called upon with:
%D
%D \showsetup{\y!from}
%D
%D As can be expected, this macro used \type{\goto} to
%D perform its task.
% normal version:
%
% \def\from[#1]%
% {\dontleavehmode % added, but probably not needed
% \bgroup
% \doifinstringelse{::}{#1}{\docomplexuit[#1]}{\docomplexuit[#1::]}}
%
% since we need to serve active :'s we need the less readable:
\def\dospecialfrom % retest this one !
{\dosingleempty\dodospecialfrom}
\def\dodospecialfrom[#1]%
{\dontleavehmode % added, but probably not needed
\bgroup
\protectlabels % needed for active french :'s
\iffirstargument
\edef\!!stringa{#1}%
\doifincsnameelse{::}\!!stringa\donothing{\edef\!!stringa{#1::}}%
\expanded{\redospecialfrom[\!!stringa]}%
\else
\expanded{\nodospecialfrom[\otherlabel]}%
\fi
\egroup}
\def\redospecialfrom[#1::#2]%
{\ifundefined{\v!file:::#1}%
\tttf[#1]%
\else
\def\doexternaldocument##1##2##3{\goto{##3}[#1::#2]}%
\csname\v!file:::#1\endcsname
\fi}
\def\nodospecialfrom[#1]%
{\ifundefined{\v!file:::#1}%
\tttf[#1]%
\else
\def\doexternaldocument##1##2##3{##3}% different than ^
\csname\v!file:::#1\endcsname
\fi}
%D We also support:
%D
%D \starttyping
%D \goto{some text}[file(identifier{location}]
%D \stoptyping
%D
%D which is completely equivalent with
%D
%D \starttyping
%D \goto{some text}[identifier::location]
%D \stoptyping
%D
%D The fastest implementation would be:
\definespecialtest\v!file {\setfalse\forceURLlocation\handlespecialFILEandURL}
\definespecialtest\v!URL {\settrue \forceURLlocation\handlespecialFILEandURL}
\definespecialtest\v!url {\settrue \forceURLlocation\handlespecialFILEandURL}
\definespeciallocation\v!file{\setfalse\forceURLlocation\handlespecialallocationFILEandURL}
\definespeciallocation\v!URL {\settrue \forceURLlocation\handlespecialallocationFILEandURL}
\definespeciallocation\v!url {\settrue \forceURLlocation\handlespecialallocationFILEandURL}
\def\handlespecialFILEandURL
{\localdoifreferencefoundelse
{\currentreferenceoperation::\currentreferencearguments}}
\def\handlespecialallocationFILEandURL
{\let\currentouterreference\currentreferenceoperation
\let\currentinnerreference\currentreferencearguments
\let\currentreferenceoperation\empty
\let\currentreferencearguments\empty
\gotoouterlocation}
%D Now we have file references as special ones, it's rather
%D logical to have the viewer specific ones available in a dual
%D way too. At first glance we could do with:
%D
%D \starttyping
%D \definespeciallocation\v!action
%D {\getreferenceelements\currentreferenceoperation
%D \handleexecreference}
%D \stoptyping
%D
%D An better alternative, slower but error aware, is
% \definespecialtest\v!actie
% {\localdoifreferencefoundelse\currentreferenceoperation}
\definespecialtest\v!action % rather ugly action(whatever{argument})
{\expanded{\localdoifreferencefoundelse{\currentreferenceoperation
\ifx\currentreferencearguments\empty\else{\currentreferencearguments}\fi}}}
\definespeciallocation\v!action
{\handleexecreference}
%D So now we can say:
%D
%D \starttyping
%D \goto{some action}[PreviousJump]
%D \stoptyping
%D
%D as well as:
%D
%D \starttyping
%D \goto{some text}[action(PreviousJump]
%D \stoptyping
%D A special case of references are those to programs. These,
%D very system dependant references are implemented by abusing
%D some of the previous macros.
%D
%D \showsetup{\y!setupprograms}
%D \showsetup{\y!defineprogram}
%D \showsetup{\y!program}
%D
%D The latter gives access to the description of the program,
%D being the last argument to the definition command.
\def\setupprograms
{\dodoubleargument\getparameters[\??pr]}
\def\dodefineprogram[#1][#2][#3]%
{\setgvalue{\v!program:::#1}{\doprogram{#2}{#3}}}
\def\defineprogram
{\dotripleargument\dodefineprogram}
\def\program#1[#2]%
{\bgroup
\ifundefined{\v!program:::#2}%
{\tttf[#2]}%
\else
\def\doprogram##1##2%
{\goto{\doifelsenothing{#1}{##2}{#1}}[\v!program(#2)]}%
\csname\v!program:::#2\endcsname
\fi
\egroup}
% needs an update: program(abc{arg})
\definespeciallocation\v!program#1#2%
{\bgroup
\iflocation
\doifdefinedelse{\v!program:::\currentreferenceoperation}
{\def\doprogram##1##2{\def\@@programfile{##1}}%
\getvalue{\v!program:::\currentreferenceoperation}}
{\let\@@programfile\currentreferenceoperation}%
\convertcommand\@@programfile\to\ascii
\dostartgoto
\data
{#2}%
\start
\dostartrunprogram\buttonwidth\buttonheight
{\@@prdirectory\ascii}\currentreferencearguments
\stop
\dostoprunprogram
\dostopgoto
\else
{#2}%
\fi
\egroup}
%D As we can see, we directly use the special reference
%D mechanism, which means that
%D
%D \starttyping
%D \goto{some text}[program(name{args})]
%D \stoptyping
%D
%D is valid.
%D The next macro provides access to the actual pagenumbers.
%D When documenting and sanitizing the original reference
%D macros, I decided to keep the present meaning as well as to
%D make this meaning available as a special reference method.
%D So now one can use:
%D
%D \starttyping
%D \gotopage{some text}[location]
%D \gotopage{some text}[number]
%D \gotopage{some text}[file::number]
%D \stoptyping
%D
%D as well as:
%D
%D \starttyping
%D \goto{some text}[page(location)]
%D \goto{some text}[page(number)]
%D \goto{some text}[file::page(number)]
%D \stoptyping
%D
%D Here location is a keyword like \type{nextpage}.
%D
%D \showsetup{\y!gotopage}
\def\dodefinepage[#1][#2]%
{\setvalue{\v!page:::#1}{#2}}
\def\definepage
{\dodoubleargument\dodefinepage}
\definepage [\v!firstpage] [\firstpage]
\definepage [\v!previouspage] [\prevpage]
\definepage [\v!nextpage] [\nextpage]
\definepage [\v!lastpage] [\lastpage]
\definepage [\v!firstsubpage] [\firstsubpage]
\definepage [\v!previoussubpage] [\prevsubpage]
\definepage [\v!nextsubpage] [\nextsubpage]
\definepage [\v!lastsubpage] [\lastsubpage]
\definepage [\v!first] [\firstpage]
\definepage [\v!previous] [\prevpage]
\definepage [\v!next] [\nextpage]
\definepage [\v!last] [\lastpage]
\definepage [\v!first\v!sub] [\firstsubpage]
\definepage [\v!previous\v!sub] [\prevsubpage]
\definepage [\v!next\v!sub] [\nextsubpage]
\definepage [\v!last\v!sub] [\lastsubpage]
%D Because we combine both methods, we have to take care of
%D the \type{file::page(n)} as well as \type{page(file::n)}.
% \definespeciallocation\v!pagina#1#2%
% {\iflocation
% \ifx\currentouterreference\empty
% \splitoffreference\currentreferenceoperation
% \else
% \let\currentinnerreference=\currentreferenceoperation
% \fi
% \ifx\currentouterreference\empty
% \doifnonzeropositiveelse{\currentinnerreference}
% {}
% {\edef\currentinnerreference{1}}%
% \gotorealpage\empty\empty\currentinnerreference{#2}%
% \else
% \setouterlocation\currentouterreference
% \doifnonzeropositiveelse{\currentinnerreference}
% {}
% {\doifdefinedelse{\v!pagina:::\currentinnerreference}
% {\edef\currentinnerreference{\getvalue{\v!pagina:::\currentinnerreference}}}
% {\edef\currentinnerreference{1}}}%
% \gotorealpage\otherURL\otherfile\currentinnerreference{#2}%
% \fi
% \else
% {#2}%
% \fi}
% \definespeciallocation\v!pagina#1#2% page(n) page(+n) page(-n)
% {\iflocation
% \ifx\currentouterreference\empty
% \splitoffreference\currentreferenceoperation
% \else
% \let\currentinnerreference\currentreferenceoperation
% \fi
% \ifx\currentouterreference\empty
% \doifinstringelse+\currentinnerreference
% {\scratchcounter\realpageno
% \advance\scratchcounter \currentinnerreference
% \edef\currentinnerreference{\the\scratchcounter}}
% {\doifinstringelse-\currentinnerreference
% {\scratchcounter\realpageno
% \advance\scratchcounter \currentinnerreference
% \edef\currentinnerreference{\the\scratchcounter}}
% \donothing}%
% \doifnonzeropositiveelse\currentinnerreference
% \donothing
% {\edef\currentinnerreference{1}}%
% \gotorealpage\empty\empty\currentinnerreference{#2}%
% \else
% \setouterlocation\currentouterreference
% \doifnonzeropositiveelse\currentinnerreference
% \donothing
% {\doifdefinedelse{\v!pagina:::\currentinnerreference}
% {\edef\currentinnerreference{\getvalue{\v!pagina:::\currentinnerreference}}}
% {\edef\currentinnerreference{1}}}%
% \gotorealpage\otherURL\otherfile\currentinnerreference{#2}%
% \fi
% \else
% {#2}%
% \fi}
\definespeciallocation\v!page#1#2% page(n) page(+n) page(-n)
{\iflocation
\ifx\currentouterreference\empty
\splitoffreference\currentreferenceoperation
\else
\let\currentinnerreference\currentreferenceoperation
\fi
\ifx\currentouterreference\empty
\doifinstringelse+\currentinnerreference
{\scratchcounter\realpageno
\advance\scratchcounter \currentinnerreference
\edef\currentinnerreference{\the\scratchcounter}}
{\doifinstringelse-\currentinnerreference
{\scratchcounter\realpageno
\advance\scratchcounter \currentinnerreference
\edef\currentinnerreference{\the\scratchcounter}}
\donothing}%
\doifnonzeropositiveelse\currentinnerreference
\donothing
{\edef\currentinnerreference{1}}%
\docheckrealreferencepage\currentinnerreference % new
\let\currentrealreference\currentinnerreference % handy to have this available
\gotorealpage\empty\empty\currentinnerreference{#2}%
\else
\setouterlocation\currentouterreference
\doifnonzeropositiveelse\currentinnerreference
\donothing
{\doifdefinedelse{\v!page:::\currentinnerreference}
{\edef\currentinnerreference{\getvalue{\v!page:::\currentinnerreference}}}
{\edef\currentinnerreference{1}}}%
\gotorealpage\otherURL\otherfile\currentinnerreference{#2}%
\fi
\else
{#2}%
\fi}
\def\gotopage#1[#2]%
{\goto{#1}[\v!page(#2)]}
%D A still very rudimentary|/|experimental forward|/|backward
%D reference mechanism is provided by the macro \type{\atpage}:
%D
%D \starttyping
%D ... \somewhere{backward text}{forward text}[someref] ...
%D ... \atpage[someref] ...
%D \stoptyping
%D
%D In future versions there will be more sophisticated
%D support, also suitable for references to floating bodies.
\unexpanded\def\somewhere#1#2#3[#4]% #3 gobbles space around #2
{\dontleavehmode
%\leaveoutervmode
\doifreferencefoundelse{#4}
{\ifforwardreference
\doifelsenothing{#1}
{\dosymbolreference{}{}[#4]}
{\dogotospace{#1}[#4]}%
\else
\doifelsenothing{#2}
{\dosymbolreference{}{}[#4]}
{\dogotospace{#2}[#4]}%
\fi}
{\unknownreference{#4}#1/#2}%
\referentieinfo{<}{#4}}
\unexpanded\def\atpage[#1]%
{\dontleavehmode
%\leaveoutervmode
\doifreferencefoundelse{#1}
{\ifrealreferencepage
\ifforwardreference
\dogotofixed{\labeltext\v!hencefore}[#1]%
\else
\dogotofixed{\labeltext\v!hereafter}[#1]%
\fi
\else
\dogotofixed{\labeltexts\v!atpage\currentpagereference}[#1]%
\fi}
{\unknownreference{#1}%
\labeltexts\v!page\dummyreference}%
\referentieinfo{<}{#1}}
%D We can cross link documents by using:
%D
%D \showsetup{\y!coupledocument}
%D
%D like:
%D
%D \starttyping
%D \coupledocument[print][somefile][chapter,section]
%D \stoptyping
%D
%D After which when applicable, we have available the
%D references:
%D
%D \starttyping
%D \goto{print version}[print::chapter]
%D \stoptyping
%D
%D and alike. The title placement definition macros have a
%D key \type{file}, which is interpreted as the file to jump
%D to, that is, when one clicks on the title.
\let\crossdocumentreferences\empty
\let\crossdocumentelements\empty
\newif\ifautocrossdocument
\def\docoupledocument[#1][#2][#3][#4]% is this :/- safe ?
{\ifthirdargument
\begingroup
\def\dolistelement##1##2##3##4##5##6% 2=aut 6=pag / 2 goes into text ref slot
{\global\utilitydonetrue %{Watch the braces here below!}
\setglobalcrossreference{{##1::\@@filterblocknumberpart[##5]}}{}{##6}{##2}}%
\def\usereferences[##1]%
%{\setbox0\vbox{\doutilities{#3}{##1}{#3}\relax\relax}}%
{\startnointerference
\doutilities{#3}{##1}{#3}\relax\relax
\stopnointerference}%
\douseexternaldocument[#1][#2][#4]%
\doglobal\addtocommalist{#1}\crossdocumentreferences
\def\docommando##1%
{\letgvalue{\??rf##1\c!state}\v!start % for fast checking
\doglobal\addtocommalist{##1}\crossdocumentelements}%
\processcommalist[#3]\docommando
\ifutilitydone
\global\autocrossdocumenttrue
\fi
\endgroup
\fi}
\def\coupledocument%
{\doquadrupleempty\docoupledocument}
%D --- STRANGE HERE, BETTER IN CORE-NAV ---
\def\checkcontrastreference#1%
{\ifnum\currentreferencetype=\rt!page\ifnum\currentdatareference=\realpageno
\doifdefined{#1\c!contrastcolor}
{\setevalue{#1\c!color}{\getvalue{#1\c!contrastcolor}}}%
\fi\fi}
\def\checkcontrastreference#1%
{\ifnum\currentreferencetype=\rt!page\relax\ifnum\currentdatareference=\realpageno
\copycsname#1\c!color\endcsname\csname#1\c!contrastcolor\endcsname
\fi\fi}
%D Buttons are just what their names says: things that can be
%D clicked (pushed) on. They are similar to \type{\goto},
%D except that the text argument is not interpreted.
%D Furthermore one can apply anything to them that can be done
%D with \type{\framed}.
%D
%D \startbuffer
%D \button[width=3cm,height=1.5cm]{Exit}[ExitViewer]
%D \stopbuffer
%D
%D \typebuffer
%D
%D gives
%D
%D \getbuffer
%D
%D This command is formally specified as:
%D
%D \showsetup{\y!button}
%D
%D The characteristics can be set with:
%D
%D \showsetup{\y!setupbuttons}
\def\setupbuttons
{\dodoubleargument\getparameters[\??bt]}
\definecomplexorsimpleempty\button
\def\complexbutton
{\docomplexbutton\??bt}
\presetlocalframed[\??bt]
\long\def\docomplexbutton#1[#2]#3#4% get rid of possible space before [#4]
{\dodocomplexbutton#1[#2]{#3}#4} % #4 == [
\def\buttonframed{\dodoubleempty\localframed[\??bt]} % goodie
\long\def\dodocomplexbutton#1[#2]#3[#4]% #3 can contain [] -> {#3} later
{\bgroup
\doifvalue{#1\c!state}\v!stop\locationfalse
\iflocation
\resetgoto
\ConvertConstantAfter\doifelse{#3}\v!none\hphantom\hbox
{\doifelsenothing{#4}
{\setlocationboxnop#1[#2]{#3}[#4]}
{\doifreferencefoundelse{#4}
{\setlocationboxyes#1[#2]{#3}[#4]}
{\unknownreference{#4}%
\setlocationboxnop#1[#2]{#3}[#4]}}}%
\fi
\egroup}
%D Interaction buttons, in fact a row of tiny buttons, are
%D typically only used for navigational purposed. The next
%D macro builds such a row based on a specification list.
%D
%D \startbuffer
%D \interactionbuttons
%D [width=\hsize][page,PreviousJump,ExitViewer]
%D \stopbuffer
%D
%D \typebuffer
%D
%D gives
%D
%D \getbuffer
%D
%D Apart from individual entries, one can use \type{page} and
%D \type {subpage} as shortcuts to their four associated buttons.
%D The symbols are derived from the symbols linked to the
%D entries.
% does not work well with for instance SomeRef{whatever}
\def\interactionbuttons
{\dodoubleempty\dointeractionbuttons}
\def\dointeractionbuttons[#1][#2]% er is een verdeel macro \horizontalfractions
{\iflocation
% BUG: fails when frame=off; best is to rewrite this macro
\bgroup
\doif\@@ibstate\v!stop\locationfalse
\iflocation
\ifsecondargument
\setupinteractionbar[#1]%
\checkinteractionbar{1.5em}\v!broad\!!zeropoint % brrrrr
\setbox2\hbox
{\localframed[\??ib][\c!background=]{\symbol[\@@iasymbolset][\v!previouspage]}}%
\!!heighta\ht2 % needed because we default to nothing
\setupinteractionbar[\c!strut=\v!no]%
\setinteractionparameter\c!width\!!zeropoint
\!!counta\zerocount % new, was 1
\processallactionsinset
[#2]
[ \v!page=>\advance\!!counta 4,
\v!subpage=>\advance\!!counta 4,
\s!unknown=>\advance\!!counta 1]%
\ifdim\@@ibwidth=\zeropoint
\!!widtha2em
\advance\!!widtha \@@ibdistance % new
\!!widthb\!!counta\!!widtha
\advance\!!widthb -\@@ibdistance % new
\else
\!!widtha\@@ibwidth
\!!widthb\@@ibdistance % new
\multiply\!!widthb \!!counta % new
\advance\!!widthb -\@@ibdistance % new
\advance\!!widtha -\!!widthb % new
\divide\!!widtha \!!counta
\!!widthb\@@ibwidth
\fi
\def\goto##1% clash ?
{\setnostrut
\edef\localreference{##1}%
\expanded{\dodocomplexbutton\??ib[\c!height=\the\!!heighta,\c!width=\the\!!widtha]}%
{\dontleavehmode\symbol[\@@iasymbolset][\localreference]}%
[\localreference]%
\hss}%
\hbox to \!!widthb
{\processallactionsinset
[#2]
[ \v!page=>\goto\v!firstpage
\goto\v!nextpage
\goto\v!previouspage
\goto\v!lastpage,
\v!subpage=>\goto\v!firstsubpage
\goto\v!nextsubpage
\goto\v!previoussubpage
\goto\v!lastsubpage,
\s!unknown=>\goto\commalistelement]%
\unskip}%
\else
\interactionbuttons[][#1]%
\fi
\fi
\egroup
\fi}
%D \macros
%D {overlaybutton}
%D
%D For converience we provide:
%D
%D \starttyping
%D \overlaybutton[reference]
%D \stoptyping
%D
%D This command can be used to define overlays an/or can be
%D used in the whatevertext areas, like:
%D
%D \starttyping
%D \defineoverlay[PrevPage][\overlaybutton{PrevPage}]
%D \setupbackgrounds[page][background=PrevPage]
%D \setuptexttexts[\overlaybutton{NextPage}]
%D \stoptyping
%D
%D For practical reasons, this macro accepts square brackets
%D as well as braces.
\definecomplexorsimple\overlaybutton
\def\simpleoverlaybutton#1%
{\complexoverlaybutton[#1]}
\def\complexoverlaybutton[#1]%
{\iflocation
\doifreferencefoundelse{#1}
{\overlayfakebox {#1}}
{\unknownreference{#1}}%
\fi}
\def\overlayfakebox#1%
{\hbox
{\setbox\scratchbox\null
\wd\scratchbox\overlaywidth
\ht\scratchbox\overlayheight
\locationstrutfalse
\gotolocation{#1}{\box\scratchbox\presetgoto}}}
%D \macros
%D {dotextprefix}
%D
%D In previous macros we used \type {\dotextprefix} to
%D generate a space between a label and a number.
%D
%D \starttyping
%D \dotextprefix{text}
%D \stoptyping
%D
%D Only when \type {text} is not empty, a space is inserted.
\def\dotextprefix#1%
{\bgroup
\global\labeltextdonefalse % this is an ugly dependancy,
\setbox\scratchbox\hbox{#1}% to be solved some day
\ifdim\wd\scratchbox>\zeropoint
\unhbox\scratchbox
\iflabeltextdone\else\@@rfseparator\fi
\else
\unhbox\scratchbox
\fi
\egroup}
%D In the next settings we see some variables that were not
%D used here and that concern the way the pagenumbers refered
%D to are typeset.
\setupreferencing
[\c!state=\v!start,
\c!autofile=\v!no,
\v!part\c!number=\v!yes,
\v!chapter\c!number=\v!no,
\c!interaction=\v!all,
%\c!urlalternative=\v!both,
%\c!urlspace=\v!no,
%\c!urlletter=,
%\c!urlkleur=,
\c!convertfile=\v!no,
%\c!strut=\v!no, % some day an option
\c!prefix=,
\c!width=.75\makeupwidth,
\c!left=\quotation\bgroup,
\c!right=\egroup,
\c!global=\v!no,
\c!expansion=\v!no,
\c!separator=\nonbreakablespace]
\let\nonbreakablespace=~
\setupurl
[\c!alternative=\v!both,
\c!space=\v!no,
\c!style=\v!type,
\c!color=]
\setupprograms
[\c!directory=]
%D We cannot set up buttons (not yet, this one calls a menu macro):
% under consideration:
%
% \setupinteraction[state=start]
%
% \unprotect
%
% \chardef\rt!extern=5
%
% \definesystemreferencehandler \rt!extern \handleexecreference
%
% \definespecialtest\v!extern
% {\expanded{\localdoifreferencefoundelse{\currentreferenceoperation
% \ifx\currentreferencearguments\empty\else{\currentreferencearguments}\fi}}}
%
% \definespeciallocation\v!extern
% {\handleexecreference}
%
% \def\defineexternalreference[#1]%
% {\setglobalsystemreference\rt!extern{#1}{#1}}
%
% \protect
%
% \defineexternalreference[NewOne]
%
% \def\PDFexecuteNewOne{/SomeNewAction /SomeParameter (\argumentA)}
%
% \starttext
%
% \goto{test}[AVDP{../../nach-dateipfad.pdf}]
% \blank
% \goto{test}[external(AVDP{../../nach-dateipfad.pdf})]
% \blank
% \goto{test}[AVDP{../../nach-dateipfad.pdf}]
% \blank
% \goto{test}[external(AVDP{../../nach-dateipfad.pdf})]
% \blank
% \goto{test}[CloseDocument]
% \blank
% \goto{test}[action(CloseDocument)]
%
% \stoptext
\protect \endinput
|