Markdown syntax with GeSHi code highlighting added. Version: 0.2 Author: Gerard van Helden Author URI: http://melp.nl */ define('MARKDOWN_PARSER_CLASS', 'MarkdownGeshi_Parser'); require_once 'pastedown.php'; require_once 'wp-syntax/geshi/geshi.php'; class MarkdownGeshi_Parser extends MarkdownExtra_Parser { /** * The 'processing instruction' pattern for the code blocks parser. * Format is defined as : #!language@linenumber. The @linenumber * part is optional. * * Optional parameters are allowed past a semicolon. */ public $shebang = '/^ \s* \#!(?P\w+) (?:@(?P\d+))? \s* (?:;\s*(?P.*?)\s*)?\n (?P

.*)
    /sx';
    
    function hasShebang($code) {
        if(preg_match($this->shebang, $code, $m)) {
            return $m;
        }
        return false;
    }

    function _doCodeBlocks_callback($matches) {
        if($m = $this->hasShebang($matches[1])) {
            return $this->_doGeshi($m);
        } else {
            return parent::_doCodeBlocks_callback($matches);
        }
    }
    
    function _doFencedCodeBlocks_callback($matches) {
        if($m = $this->hasShebang($matches[2])) {
            return $this->_doGeshi($m);
        } else {
            return parent::_doFencedCodeBlocks_callback($matches);
        }
    }
        
    function _doGeshi($shebangMatch) {
        $language = $shebangMatch['lang'];
        $line = (int) (($shebangMatch['linenumber'] > 1) ? $shebangMatch['linenumber'] : 0);
        $codeblock = $shebangMatch['code'];
        
        $highlighter = new GeSHi($this->outdent(trim($codeblock)), $language);
        $highlighted = $highlighter->parse_code();
        if($line) {
            preg_match('!^(\s*]+>)(.*)()!s', $highlighted, $m);

            $ret = '$0', 
                $m[2]
            );
            $ret .= '';
            
            $ret = $m[1] . $ret . $m[3];
        } else {
            $ret = $highlighted;
        }
        if($shebangMatch['params']) {
            $ret = $this->_processGeshiParams($ret,  $shebangMatch['params']);
        }
        
        return "\n\n" . $this->hashBlock($ret) . "\n\n";
    }
    
    
    function _processGeshiParams($highlighted, $params) {
        foreach(explode(',', $params) as $keyValuePair) {
            @list($key, $value) = array_map('trim', explode('=', $keyValuePair));
            if($key && $value) {
                switch($key) {
                    case 'gist':
                        $highlighted = 
                            sprintf(
                                '(GIST: %1$d)', 
                                $value
                            )
                            . $highlighted
                        ;
                        break;
                }
            }
        }
        return $highlighted;
    }
}