GraphViz Source

This is a MediaWiki Extension. For more information about it, see the documentation in GraphViz Source Extension.

Important! Unless otherwise specified, this extension is released under GNU General Public License V3. If you choose to install it, you do so at your own risk and discretion.

# CoffMan (http://www.wickle.com) code adapted from timeline extension.
# Timeline extension
# To use, include this file from your LocalSettings.php
# To configure, set members of $wgGraphVizSettings after the inclusion
#
# This version was modified by Kenny Root ( http://the-b.org/ ) to use the
# automatically generated SWIG version of GraphViz for PHP.
#
require_once("gv.php");
 
$wgExtensionFunctions[] = "wfGraphVizExtension";
 
function wfGraphVizExtension() {
        global $wgParser;
        $wgParser->setHook( "graphviz", "renderGraphviz" );
}
 
function renderGraphviz( $text, $params = array(), &$parser)
{
        global $wgUploadDirectory, $wgUploadPath, $IP, $wgGraphVizSettings, $wgArticlePath, $wgTmpDirectory;
 
        $layout = 'dot';
        if (array_key_exists('layout', $params))
                $layout = $params['layout'];
 
        $hash = md5( $layout . $text );
        $dest = $wgUploadDirectory."/graphviz/";
        if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 
        $fname = $dest . $hash;
 
        if (! file_exists( $fname.".png" ) )
        {
                $G = gv::readstring($text);
                if (!gv::layout($G, $layout))
                        return "<p>Error in layout for Graphviz.</p>";
                if (!gv::render($G, "png", $fname.".png"))
                        return "<p>Error in PNG render for Graphviz.</p>";
                if (!gv::render($G, "cmapx", $fname.".map"))
                        return "<p>Error in map render for Graphviz.</p>";
        }
 
        @$map = file_get_contents( $fname.".map" );
 
        $map=preg_replace("#<ma(.*)>#"," ",$map);
        $map=str_replace("</map>","",$map);
 
        if (substr(php_uname(), 0, 7) == "Windows") {
                $ext = "gif";
        } else {
                $ext = "png";
        }
 
        if (trim($map) != "") {
                $txt  = "<map name=\"$hash\">{$map}</map>".
                        "<img usemap=\"#{$hash}\" src=\"{$wgUploadPath}/graphviz/{$hash}.{$ext}\" />";
        } else {
                $txt = "<img src=\"{$wgUploadPath}/graphviz/{$hash}.{$ext}\" />";
        }
 
        return $txt;
}
 
 
//