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%D \module
%D [ file=xtag-xsl,
%D version=2002.03.07,
%D title=\CONTEXT\ XML Support,
%D subtitle=XSLT processing,
%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.
% FOR THIS TO WORK YOU NEED A PROPER cp8bit VECTOR
%
% 8 bit support has been messed up in a couple of distributions
%
% 0x00 0x00
% 0x01 0x01
% 0x02 0x02
% etc
%D This module is rather experimental so users may expect
%D changes in the interface.
\unprotect
\definesystemvariable {xl}
\newif\iftraceXSLTprocessing % \traceXSLTprocessingtrue
\def\XSLTscriptfile{\bufferprefix xlscript}
% to be sped up:
\def\presetXSLTcharacters
{\let\par\empty
\def\{{\rawcharacter{`\{}}% \string^^..
\def\}{\rawcharacter{`\}}}% \string^^..
\def\\{\rawcharacter{`\\}}}% \string^^..
\def\obeyXSLTcharacters
{\setnaturalcatcodes
\catcode`\\=\@@escape}
\long\def\startXSLTscript #1 #2 %
{\bgroup
\obeyXSLTcharacters
\doifelse{#2}{capsule}\dostartXSLTscript\nostartXSLTscript#1 #2 }
\long\def\dostartXSLTscript#1 #2 #3 %
{\obeylines
\dodostartXSLTscript#1 #2 #3 }
\long\def\dodostartXSLTscript#1 #2 #3 #4\stopXSLTscript
{\egroup
\long\setvalue{\??xl#1}{\doXSLTscript{#3}{#4}}}
\long\def\nostartXSLTscript
{\obeylines
\nonostartXSLTscript}
\long\def\nonostartXSLTscript#1 #2\stopXSLTscript
{\egroup
\long\setvalue{\??xl#1}{\doXSLTscript\empty{#2}}}
\long\def\donormalXSLTscript#1#2%
{\includeXSLTscript{b-capsule-#1}%
#2%
\includeXSLTscript{e-capsule-#1}}
\def\includeXSLTscript#1%
{\csname\ifcsname\??xl#1\endcsname\??xl#1\else\s!empty\fi\endcsname}
\startXSLTscript b-capsule-1.0
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
\stopXSLTscript
\startXSLTscript e-capsule-1.0
</xsl:stylesheet>
\stopXSLTscript
\def\applyXSLTscript
{\dotripleempty\doapplyXSLTscript}
\long\def\doapplyXSLTscript[#1][#2][#3]%
{\ifthirdargument
\bgroup
\let\doXSLTscript\donormalXSLTscript
\presetXSLTcharacters
\donefalse
\def\docommando##1{\dodoapplyXSLTscript{##1}{\ifdone#3\else#2\fi}{#3}\donetrue}%
\processcommalist[#1]\docommando
\egroup
\else
\applyXSLTscript[#1][#2][#2]%
\fi}
% Since a \XML\ file is loaded into memory as a tree, we
% can safely use the same input and output filename, thereby
% avoiding temporary files.
\def\dodoapplyXSLTscript#1#2#3%
{\bgroup
\doifundefined{\??xl#1}%
{\writestatus{XSLT}{unknown script #1}}
{\writestatus{XSLT}{convert #2 into #3 using #1}%
\edef\par{\rawcharacter{13}}%
\edef\!!stringc{\getvalue{\??xl#1}}%
\immediate\openout\scratchwrite=\XSLTscriptfile.xsl
\immediate\write\scratchwrite{\!!stringc}%
\immediate\closeout\scratchwrite
\iftraceXSLTprocessing\wait\fi
\executeXSLT{\XSLTscriptfile.xsl}{#2}{#3}%
\iftraceXSLTprocessing\wait\fi}%
\egroup}
\def\executeXSLT#1#2#3% script input output
{\executesystemcommand{xsltproc -o #3 #1 #2}}
\long\def\applyXSLTtobuffer
{\dodoubleempty\doapplyXSLTtobuffer}
\long\def\doapplyXSLTtobuffer[#1][#2]%
{\expanded{\applyXSLTscript[#1][\TEXbufferfile{\ifsecondargument#2\else\jobname\fi}]}}
\def\resetXSLTscripting#1%
{\setgvalue{\??xl\s!dummy}{\doXSLTscript{#1}{}}}
\resetXSLTscripting{1.0}
\def\startXSLTscripting
{\bgroup
\obeyXSLTcharacters
\obeylines
\dostartXSLTscripting}
\long\def\dostartXSLTscripting#1\stopXSLTscripting
{\egroup
\let\doXSLTscript\doextendXSLTscript
\getvalue{\??xl\s!dummy}{#1}}
\long\def\doextendXSLTscript#1#2#3%
{\setgvalue{\??xl\s!dummy}{\doXSLTscript{#1}{#2#3}}}
\def\applyXSLTscripting
{\applyXSLTscript[\s!dummy]}
\protect
\doifnotmode{demo}{\endinput}
% \def\Whow{Whow It Works}
%
% \startXSLTscript test capsule 1.0
% <xsl:output method="text"/>
%
% <xsl:template match="/figurelibrary/figure">
% \Whow \\ #<xsl:apply-templates/>
% </xsl:template>
%
% <xsl:template match="/">
% <xsl:apply-templates/>
% </xsl:template>
% \stopXSLTscript
%
% \applyXSLTscript [test] [figtest.xml] [crap.tmp] \typefile{crap.tmp}
%
% \startbuffer
% <hello>world</hello>
% \stopbuffer
%
% \applyXSLTtobuffer[test] \typebuffer
%
% \startXSLTscripting
% <xsl:output method="text"/>
% \stopXSLTscripting
%
% \startXSLTscripting
% <xsl:template match="/figurelibrary/figure">
% <xsl:apply-templates/>
% </xsl:template>
% \stopXSLTscripting
%
% \startXSLTscripting
% <xsl:template match="/">
% <xsl:apply-templates/>
% </xsl:template>
% \stopXSLTscripting
%
% \applyXSLTscripting [figtest.xml] [crap.tmp] \typefile{crap.tmp}
\starttext
\startXSLTscript another
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:cd="http://www.pragma-ade.com/commands"
version="1.0">
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="cd:interface">
<xsl:apply-templates><xsl:sort order="descending" select="@name"/></xsl:apply-templates>
</xsl:template>
<xsl:template match="cd:command">
name: <xsl:value-of select="@name"/>\\par
</xsl:template>
</xsl:stylesheet>
\stopXSLTscript
\applyXSLTscript [another] [cont-en.xml] [whatever.tmp]
\readfile{whatever.tmp}{}{}
\stoptext
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