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%D \module
%D [ file=m-gnuplot,
%D version=2006.01.04,
%D title=\CONTEXT\ Extra Modules,
%D subtitle=\GNUPLOT\ Inclusion,
%D author={Tobias Burnus, Hans Hagen, Taco Hoekwater, Mojca Miklavec},
%D date=\currentdate,
%D copyright=\PRAGMA]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
% todo: reuse (only if really needed)
% \enablemode[demo]
%D example:
%D
%D \starttyping
%D texexec --pdf --mode=demo m-gnuplot
%D \stoptyping
\unprotect
\ifx\operatingsystem\undefined \def\operatingsystem{unix} \fi % texexec will set that
\newcounter\GNUPLOTnumber
\def\startGNUPLOTinclusions
{\bgroup
\obeylines
\catcode`\%=\@@letter
\dostartGNUPLOTinclusions}
\def\dostartGNUPLOTinclusions#1\stopGNUPLOTinclusions
{\gdef\GNUPLOTinclusions{#1}%
\egroup}
\let\GNUPLOTinclusions\empty
\def\startGNUPLOTgraphic#1%
{\bgroup
\obeylines
\catcode`\%=\@@letter
\dostartGNUPLOTgraphic{#1}}
\def\dostartGNUPLOTgraphic#1#2\stopGNUPLOTgraphic
{\doglobal\increment\GNUPLOTnumber
\letgvalue{gpg:n:#1}\GNUPLOTnumber
\setgvalue{gpg:d:\GNUPLOTnumber}{#2}%
\egroup}
\def\useGNUPLOTgraphic
{\dodoubleempty\douseGNUPLOTgraphic}
\def\douseGNUPLOTgraphic[#1][#2]%
{\iffirstargument
\@EA\dodouseGNUPLOTgraphic % like \externalfigure[name][optional args]
\else
\@EA\redouseGNUPLOTgraphic % like \useMPgraphic{name}
\fi[#1][#2]}
\def\redouseGNUPLOTgraphic[#1][#2]#3%
{\dodouseGNUPLOTgraphic[#3][]}
\newtoks\everyGNUPLOTgraphic
% gnuplot only seems to handle lf so we cannot use \mappartolineend
% also, in order to prevent fuzzy runs (or no runs) we add a ; to
% each line
\appendtoks
\obeylines
\def\obeyedline{;\outputnewlinechar}%
\to \everyGNUPLOTgraphic
\appendtoks
\let\%\letterpercent
\def\ {\letterbackslash\outputnewlinechar}%
\to \everyGNUPLOTgraphic
\def\dodouseGNUPLOTgraphic[#1][#2]%
{\bgroup
\doifdefined{gpg:n:#1}
{\edef\GNUPLOTnumber{\getvalue{gpg:n:#1}}%
\edef\GNUPLOTfile {\bufferprefix gnuplot-\GNUPLOTnumber}%
\bgroup
\the\everyGNUPLOTgraphic
\immediate\openout\scratchwrite=\GNUPLOTfile.gpd
\immediate\write\scratchwrite{set terminal \@@GNUPLOToutput\space\@@GNUPLOToption}%
\doifnotempty
{\GNUPLOTinclusions}{\immediate\write\scratchwrite{\GNUPLOTinclusions}}%
\immediate\write\scratchwrite{set output "\GNUPLOTfile.\@@GNUPLOTsuffix"}%
\immediate\write\scratchwrite{\getvalue{gpg:d:\GNUPLOTnumber}}%
\immediate\write\scratchwrite{quit}%
\immediate\closeout\scratchwrite
\egroup
\processGNUPLOTgraphic
\convertGNUPLOTgraphic
\externalfigure[\@@GNUPLOTresult][#2]}%
\egroup}
% we assume pdf inclusion, eps wil be implemented when applicable
\def\setupGNUPLOT
{\dodoubleempty\getparameters[@@GNUPLOT]}
\def\processGNUPLOTgraphic
{\doifelse\operatingsystem{mswin}
{\executesystemcommand{start /MIN pgnuplot \GNUPLOTfile.gpd}} % start is needed else gp fails
{\executesystemcommand{gnuplot \GNUPLOTfile.gpd}}}
\def\convertGNUPLOTgraphic
{\doifsomething\@@GNUPLOThandle{\executesystemcommand{\@@GNUPLOThandle}}}
\def\defineGNUPLOThandle#1#2#3#4#5% name output suffix conversion-method result
{\setvalue{@@GNUPLOT-#1}{{#2}{#3}{#4}{#5}}}
\def\@@GNUPLOToutput{\filterfromvalue{@@GNUPLOT-\@@GNUPLOTmethod}41}
\def\@@GNUPLOTsuffix{\filterfromvalue{@@GNUPLOT-\@@GNUPLOTmethod}42}
\def\@@GNUPLOThandle{\filterfromvalue{@@GNUPLOT-\@@GNUPLOTmethod}43}
\def\@@GNUPLOTresult{\filterfromvalue{@@GNUPLOT-\@@GNUPLOTmethod}44}
\defineGNUPLOThandle{postscript}{postscript}{ps} {texmfstart newpstopdf --method=raw \GNUPLOTfile.ps}{\GNUPLOTfile.pdf}
\defineGNUPLOThandle{ps} {postscript}{ps} {texmfstart newpstopdf --method=raw \GNUPLOTfile.ps}{\GNUPLOTfile.pdf}
\defineGNUPLOThandle{pdf} {pdf} {pdf}{} {\GNUPLOTfile.pdf}
\defineGNUPLOThandle{metapost} {mp} {mp} {texmfstart mptopdf \GNUPLOTfile.mp} {\GNUPLOTfile-0.pdf}
\defineGNUPLOThandle{mp} {mp} {mp} {texmfstart mptopdf \GNUPLOTfile.mp} {\GNUPLOTfile-0.pdf}
\defineGNUPLOThandle{png} {png} {png}{} {\GNUPLOTfile.png}
\setupGNUPLOT[\c!method=ps,\c!option=]
\protect \doifnotmode{demo}{\endinput}
\starttext
\startGNUPLOTinclusions
set title "trigonometry"
\stopGNUPLOTinclusions
\startGNUPLOTgraphic{sin}
plot sin(x)
\stopGNUPLOTgraphic
\startGNUPLOTgraphic{cos}
plot cos(x)
\stopGNUPLOTgraphic
\useGNUPLOTgraphic{sin} \endgraf
\useGNUPLOTgraphic{cos} \endgraf
\useGNUPLOTgraphic[cos] \endgraf
\setupGNUPLOT[method=ps] \useGNUPLOTgraphic[sin][object=no,height=2cm] \blank
%setupGNUPLOT[method=pdf] \useGNUPLOTgraphic[sin][object=no,height=2cm] \blank
\setupGNUPLOT[method=png] \useGNUPLOTgraphic[sin][object=no,height=2cm] \blank
\setupGNUPLOT[method=mp] \useGNUPLOTgraphic[sin][object=no,height=2cm,option=color] \blank
\stoptext
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