<?php
if (is_readable(dirname(__FILE__).'/geshi/geshi.php')) {
    require_once(dirname(__FILE__).'/geshi/geshi.php');
} elseif (is_readable(dirname(__FILE__).'/geshi.php')) {
    require_once(dirname(__FILE__).'/geshi.php');
}elseif (is_readable('geshi.php')) {
    require_once('geshi.php');
} else {
    die('Could not find geshi.php - make sure it is in your include path!');
}

function geshize_filter($courseid, $text)
{
    global $CFG;

    if (!isset($CFG->filter_geshize)) {
        set_config( 'filter_geshize','');
    }
	preg_match_all('%<code(?:.*?lang="(\w*)".*?)*?>(.*?)</code>%si', $text, $results, PREG_PATTERN_ORDER);
	if(!empty($results[2]))
	{
		foreach($results[2] as $k => $strCode)
		{
			$strLang = empty($results[1][$k]) ? empty($CFG->filter_geshize_default_language) ? 'php' : $CFG->filter_geshi_default_language : trim($results[1][$k]);
			$strCode = trim($strCode);
			$geshi = new GeSHi($strCode, $strLang);

			$geshi->set_header_type(GESHI_HEADER_PRE_VALID);
			$geshi->enable_classes();
    		$geshi->enable_line_numbers(GESHI_FANCY_LINE_NUMBERS, 5);
    		$geshi->set_overall_style('font-family: "Bitstream Vera Sans Mono", "Monaco", "Courier New", monospace; font-size: 9pt; color: white; border: 1px solid white; background-color: black; padding: 10px 10px 10px 10px;', false);

		    $geshi->set_line_style('line-height: 1.3em; color: #003030;', 'font-weight: bold; color: #006060;', true);
		    $geshi->set_code_style('color: #000020;', true);
		    $geshi->set_link_styles(GESHI_LINK, 'color: #000060;');
		    $geshi->set_link_styles(GESHI_HOVER, 'background-color: #f0f000;');

		    $geshi->set_footer_content('Parsed in <TIME> seconds at <SPEED>, using Moodle-Filter Geshize (c) by Robin Parker and GeSHi <VERSION>');
		    $geshi->set_footer_content_style('font-family: sans-serif; color: #808080; font-size: 70%; font-weight: bold; background-color: #f0f0ff; border-top: 1px solid #d0d0d0; padding: 2px;');

			$strReplace = '<!-- ========= BEGIN OF GESHI ================ -->' . PHP_EOL;
			$strReplace .= '<style type="text/css"><!--' . PHP_EOL . $geshi->get_stylesheet(true) . PHP_EOL .' --></style>';
			$strReplace .= '<div class="geshiBox">' . PHP_EOL;
		    $strReplace .= $geshi->parse_code() . PHP_EOL;
		    $strReplace .= '</div>' . PHP_EOL;
		    $strReplace .= '<!-- ========= END OF GESHI ================ -->' . PHP_EOL;
		    $text = str_replace($results[0][$k], $strReplace, $text);
		}
	}
	return $text;
}
?>