%D \module
%D   [       file=xtag-run,
%D        version=2001.01.10,
%D          title=\CONTEXT\ XML Support,
%D       subtitle=Visualization,
%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 XML Macros (visualization)}

\unprotect

\bgroup

\catcode`\.=\@@escape
.catcode`.B=.@@begingroup
.catcode`.E=.@@endgroup
.catcode`.#=.@@active
.catcode`.$=.@@active
.catcode`.%=.@@active
.catcode`.\=.@@active
.catcode`.^=.@@active
.catcode`._=.@@active
.catcode`.{=.@@active
.catcode`.}=.@@active
.catcode`.|=.@@active
.catcode`.~=.@@active

.gdef.verbatimXML
  B.catcode`.#=.@@active .let#.letterhash
   .catcode`.$=.@@active .let$.dollar
   .catcode`.%=.@@active .let%.percent
   .catcode`.\=.@@active .let\.letterbackslash
   .catcode`.^=.@@active .let^.letterhat
   .catcode`._=.@@active .let_.letterunderscore
   .catcode`.{=.@@active .let{.leftargument
   .catcode`.}=.@@active .let}.rightargument
   .catcode`.|=.@@active .let|.letterbar
   .catcode`.~=.@@active .let~.lettertilde
  E

.egroup

\gdef\@@XMLshow{\@@XML shw}  

\gdef\@XMLindent#1%
  {\ifnum\XMLlevel>\plusone\advance\leftskip#11em\relax\fi}

\gdef\@XMLlevel#1%
  {\advance\XMLlevel#11\relax}

\unexpanded\gdef\@XMLentity#1%
  {\noindent\hbox{\localcolortrue\color[xtag:0]{\string&#1;}}}

\bgroup

\@EA\catcode\string`=\@@active
\@EA\catcode\string`"\@@active
\@EA\catcode\string``\@@active
\@EA\catcode\string`&\@@active

\gdef\doshowXMLargument#1#2#3#4%
  {\hskip\zeropoint % or maybe \allowbreak
   \string#1\color[xtag:#3]{#4}\string#2}%

\gdef\showXMLarguments
  {\hskip\zeropoint % or maybe \allowbreak
   \ifshowXMLarguments
     \bgroup
     \@EA\catcode\string`=\@@active
     \@EA\catcode\string`"\@@active
     \@EA\catcode\string``\@@active
     \@EA\catcode\string`&\@@active
     \def={\color[xtag:7]{\string=}}%
     \def"##1"{\doshowXMLargument""8{##1}}%
     \def`##1`{\doshowXMLargument``8{##1}}%
     \def&##1;{\doshowXMLargument&;7{##1}}%
     \scantokens\@EA{\currentXMLarguments}%
     \egroup
   \else
     \currentXMLarguments
   \fi}

\egroup

\ifx\XMLprettycycle\undefined \gdef\XMLprettycycle{3} \fi 

\doglobal\newcounter\@XMLnofelements
\doglobal\newif\ifXMLunspacepretty

\gdef\@XMLelement#1%
  {\ifnum\XMLlevel<\@@xfniveau\relax
     \ifnum\kindofXMLelement=2\else
       \doglobal\increment\@XMLnofelements\relax
       \ifcase\@XMLnofelements\else\@@xftussen\fi 
     \fi 
   \fi
   \hangindent2em 
   \indent 
   \bgroup
     \localcolortrue
     \advance\XMLlevel \minusone
     \DoMod\XMLlevel by\XMLprettycycle to\scratchcounter
     \advance\scratchcounter \plusone
     \startcolor[xtag:\ifnum\scratchcounter<0 0\else\number\scratchcounter\fi]%
       \ifXMLunspacepretty\unskip\fi
       \string<%
       \ifnum\kindofXMLelement=2\string/\fi
       \currentXMLelement
     \stopcolor
     \ifcase#1\or\ifx\currentXMLarguments\empty\else
       \cleanupXMLarguments
       \startcolor[xtag:0]\hbox{\space}\showXMLarguments\unskip\stopcolor
     \fi\fi
     \startcolor[xtag:\ifnum\scratchcounter<0 0\else\number\scratchcounter\fi]%
     \ifnum\kindofXMLelement=3\string/\fi
     \string>%
     \stopcolor
   \egroup 
   \ifnum\XMLlevel<\@@xfniveau\relax
     \ifnum\kindofXMLelement=1\else
       \doglobal\increment\@XMLnofelements\relax
       \ifcase\@XMLnofelements\else\@@xftussen\fi 
     \fi 
   \fi
   \ifXMLunspacepretty\ignorespaces\fi} 

\gdef\nextXMLtext{\blank\@XMLlevel+\@XMLelement1\par}
\gdef\prevXMLtext{\par\@XMLelement0\par\@XMLlevel-\blank}
\gdef\nextXMLpara{\nextXMLline\par}
\gdef\prevXMLpara{\par\prevXMLline}
\gdef\nextXMLline{\par\@XMLlevel+\@XMLindent+\@XMLelement1}
\gdef\prevXMLline{\@XMLelement0\par\@XMLindent-\@XMLlevel-}
\gdef\nextXMLword{\@XMLlevel+\@XMLelement1}
\gdef\prevXMLword{\@XMLelement0\@XMLlevel-}

\gdef\someXMLtext{\blank\@XMLlevel+\@XMLelement1\@XMLlevel-\blank}
\gdef\someXMLpara{\someXMLline}
\gdef\someXMLline{\par\@XMLlevel+\@XMLindent+\@XMLelement1\par\@XMLindent-\@XMLlevel-}
\gdef\someXMLword{\@XMLlevel+\@XMLelement1\@XMLlevel-}

\gdef\@XMLindent#1%
  {\ifnum\XMLlevel>0\advance\leftskip#11em\relax\fi}

\gdef\nextXMLtext{\blank\@XMLlevel+\@XMLelement1\par\@XMLindent+}
\gdef\prevXMLtext{\par\@XMLindent-\@XMLelement0\par\@XMLlevel-\blank}
\gdef\nextXMLpara{\nextXMLline\par\@XMLindent+}
\gdef\prevXMLpara{\par\@XMLindent-\prevXMLline}
\gdef\nextXMLline{\par\@XMLlevel+\@XMLelement1}
\gdef\prevXMLline{\@XMLelement0\par\@XMLlevel-}

\gdef\someXMLline{\par\@XMLlevel+\@XMLelement1\par\@XMLlevel-}

\gdef\setXMLshow#1#2#3[#4]%
  {\def\docommando##1{#1[##1]#2#3\letvalue{\@@XMLshow:##1}\empty}%
   \processcommalist[#4]\docommando}

\gdef\showXMLign[#1]%
  {\setXMLshow\defineXMLignore     \relax\relax[#1]%
   \setXMLshow\defineXMLsingular   \relax\relax[#1]}

\gdef\showXMLnop[#1]%
  {\setXMLshow\defineXMLenvironment\relax\relax[#1]%
   \setXMLshow\defineXMLsingular   \relax\relax[#1]}

\gdef\showXMLtxt[#1]%
  {\setXMLshow\defineXMLenvironment\nextXMLtext\prevXMLtext[#1]%
   \setXMLshow\defineXMLsingular   \someXMLtext\relax      [#1]}

\gdef\showXMLpar[#1]%
  {\setXMLshow\defineXMLenvironment\nextXMLpara\prevXMLpara[#1]%
   \setXMLshow\defineXMLsingular   \someXMLline\relax      [#1]}

\gdef\showXMLlin[#1]%
  {\setXMLshow\defineXMLenvironment\nextXMLline\prevXMLline[#1]%
   \setXMLshow\defineXMLsingular   \someXMLword\relax      [#1]}

\gdef\showXMLwrd[#1]%
  {\setXMLshow\defineXMLenvironment\nextXMLword\prevXMLword[#1]%
   \setXMLshow\defineXMLsingular   \someXMLword\relax      [#1]}

\gdef\showXMLemp[#1]%
  {\setXMLshow\defineXMLsingular\someXMLword\relax[#1]}

\gdef\doautoshowXMLelement
  {\ifcase\kindofXMLelement
     \or \nextXMLpara \or \prevXMLpara \or \someXMLline
   \fi}

\gdef\autoshowXMLelement
  {\ifcsname\@@XMLshow:\currentXMLelement\endcsname
     \expandafter\normalexecuteXMLelement
   \else
     \expandafter\doautoshowXMLelement
   \fi}

\global\let\normalexecuteXMLelement\executeXMLelement

\gdef\showXMLfile#1%
  {\bgroup
   \nohyphens
   \dontcomplain
   \XMLlevel\zerocount
   \increment\@@xfniveau % hack 
   \tttf
   \startopelkaar[\v!blanko]
     \ifautoXMLshow \let\executeXMLelement\autoshowXMLelement \fi
     \let\executeXMLentity\@XMLentity
     \enableXML\verbatimXML
     \readfile{\truefilename{#1}}\donothing\donothing\endgraf
     \removelastskip % really needed 
   \stopopelkaar
   \egroup}

\gdef\showXMLbuffer
  {\dosingleempty\doshowXMLbuffer}

\gdef\doshowXMLbuffer[#1]%
  {\doifelsenothing{#1}
     {\doshowXMLbuffer[\jobname]}
     {\bgroup
      \def\dodoprocessXMLbuffer##1{\showXMLfile{\TEXbufferfile{##1}}}%
      \processcommalist[#1]\dodoprocessXMLbuffer
      \egroup}}

%D 

\gdef\showXSDcomponent
  {\dodoubleargument\doshowXSDcomponent}

\gdef\doshowXSDcomponent[#1][#2]%
  {\bgroup
   \showXMLnop[xsd:schema] 
   \showXMLign[xsd:appInfo] 
   \showXMLign[xsd:annotation] 
   \videXMLcontextblock[#2]
   \showXMLfile{#1}
   \egroup}

\gdef\showRNGcomponent
  {\dodoubleargument\doshowRNGcomponent}

\gdef\doshowRNGcomponent[#1][#2]%
  {\bgroup
   \videXMLcontextblock[#2]
   \showXMLfile{#1}
   \egroup}

\protect \endinput
