%%
%% This is file `graphviz.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% graphviz.dtx  (with options: `package')
%% 
%% This is a generated file.
%% 
%% Copyright (C) 2003-13 by Derek Rayside <drayside@uwaterloo.ca>
%% 
%% This file may be distributed and/or modified under the conditions of
%% the LaTeX Project Public License, either version 1.3c of this license
%% or (at your option) any later version.  The latest version of this
%% license is in:
%% 
%%    http://www.latex-project.org/lppl.txt
%% 
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\ProvidesPackage{graphviz}
   [2013/08/15 v0.94 .dtx graphviz file]
\newif\ifsinglefile
\DeclareOption{singlefile}{
    \singlefiletrue
    \AtBeginDocument{% open a new file handle
        \newwrite\masterdotfile%
        \immediate\openout\masterdotfile=\@tmpdir tmpmaster.graphviz%
        \newwrite\mastergvprfile%
        \immediate\openout\mastergvprfile=\@tmpdir tmpmaster.gvpr}
    \AtEndDocument{% close the file
        % close the dot file and the gvpr file
        \immediate\closeout\masterdotfile%
        \immediate\closeout\mastergvprfile%
        % execute the gvpr file
        \immediate\write18{gvpr -f \@tmpdir tmpmaster.gvpr \@tmpdir tmpmaster.graphviz}%
        }}
\newif\ifpsfrag
\DeclareOption{psfrag}{ \psfragtrue }
\newcommand{\@outext}{ps}
\newcommand{\@outextspace}{ps }
\DeclareOption{ps}{
    \renewcommand{\@outext}{ps}
    \renewcommand{\@outextspace}{ps }}
\DeclareOption{pdf}{%
    \renewcommand{\@outext}{pdf}%
    \renewcommand{\@outextspace}{pdf }}
\newcommand{\@tmpdir}{}
\DeclareOption{tmpdir}{%
    \immediate\write18{mkdir ./tmp/}%
    \renewcommand{\@tmpdir}{./tmp/}}
\ExecuteOptions{ps}
\ProcessOptions\relax % LaTeX class guide says it is wise to relax
\RequirePackage{graphicx}
\ifpsfrag \RequirePackage{psfrag} \fi
\newcommand{\digraph}[2][scale=1]{
  \inputdigraph[#1]{#2}{dot}%       % Include the generated ps/pdf.
  \@digraph{digraph}{#2}%           % Generate the .dot file.
}
\newcommand{\neatograph}[2][scale=1]{
  \inputdigraph[#1]{#2}{neato}%     % Include the generated ps/pdf.
  \@digraph{graph}{#2}%             % Generate the .dot file.
}
\begingroup
  \catcode`\^^M=\active%
  \gdef\@digraph{\begingroup\catcode`\^^M=\active\def^^M{^^J}\@@digraph}%
\endgroup
\def\@@digraph#1#2#3{%
    \ifsinglefile% write the graph to the master file
        \expandafter\def\csname -\endcsname{\string\n}%
        \immediate\write\masterdotfile{#1 #2 {#3}}%
        \immediate\write\mastergvprfile{BEG_G { if ($.name == "#2") {writeG($G,"\@tmpdir#2.dot");} }}%
    \else% open a new file handle
        \newwrite\dotfile%
        \immediate\openout\dotfile=\@tmpdir#2.dot%
        \expandafter\def\csname -\endcsname{\string\n}%
        \immediate\write\dotfile{#1 #2 {#3}}%
        \immediate\closeout\dotfile%
    \fi%
    \endgroup}%
\newcommand{\inputdigraph}[3][scale=1]{
    % execute dot or neato (nb: requires latex -shell-escape)
    \immediate\write18{#3 -T\@outextspace -o \@tmpdir#2.\@outextspace \@tmpdir#2.dot}
    \IfFileExists{\@tmpdir#2.\@outext}{ % the postscript/pdf exists: include it
            \ifpsfrag
                % per the ladot 2.2 source code, psfrag has a problem with
                % graphviz 2.2, and some sed hackery is necessary to work around
                \write18{sed -ibackup -e "s/xshow/pop show/g" \@tmpdir#2.ps}
            \fi
            \includegraphics[#1]{\@tmpdir#2.\@outext}
        }
        % else: the postscript/pdf doesn't exist: tell the user how to create it
        {
            \fbox{ \begin{tabular}{l}
                The file \texttt{#2.\@outext} hasn't been created from
                \texttt{\@tmpdir#2.dot} yet. \\
                Run `\texttt{dot -T\@outextspace -o \@tmpdir#2.\@outextspace \@tmpdir#2.dot}'
                to create it. \\
                Or invoke \LaTeX\ with the \texttt{-shell-escape} option
                to have this done automatically. \\
                \end{tabular}}
        }
}
\endinput
%%
%% End of file `graphviz.sty'.
