/**

    *

    * Abstrct method to parse source text for matches.

    *

    * Applies the rule's regular expression to the source text, passes

    * every match to the process() method, and replaces the matched text

    * with the results of the processing.

    *

    * @access public

    *

    * @see Text_Wiki_Parse::process()

    *

    */

    function parse()

    {

        $source =& $this->wiki->source;

        // This regex attempts to find HTML tags that can be safely compacted together without formatting loss

        // The idea is to make it easier for the HTML parser to find litewiki elements

        //$source = preg_replace('/<\/([a-z0-9:-]+?)>([\s]*[\n]+[\s]+|[\s]+[\n]+[\s]*|[\n]+)<([a-z0-9:-]+)(.*?)>/i', '</\\1><\\3\\4>', $source);

        $source = wikiformat_process_block($source);

        $rand_key = md5( str_rot13(strval(dechex(time()))) . microtime() . strval(mt_rand()) );

        preg_match_all('/<(litewiki|pre)([^>]*?)>(.*?)<\/\\1>/is', $this->wiki->source, $matches);

        $poslist = array();

        foreach ( $matches[0] as $i => $match )

        {

            $source = str_replace($match, "{LITEWIKI:$i:$rand_key}", $source);

        }

        $this->wiki->source = preg_replace_callback(

            $this->regex,

            array(&$this, 'process'),

            $this->wiki->source

        );

        foreach ( $matches[3] as $i => $match )

        {

            $source = str_replace("{LITEWIKI:$i:$rand_key}", $match, $source);

        }

        // die('<pre>'.htmlspecialchars($source).'</pre>');

        unset($matches, $source, $rand_key);

    }