class.ilSyntaxHighlighter.php

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<?php

/* Copyright (c) 1998-2014 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilSyntaxHighlighter
{
        const JAVA = "java";
        const PHP = "php";
        const C = "c";
        const CPP = "cpp";
        const HTML = "html4strict";
        const XML = "xml";
        const VISUAL_BASIC = "vb";
        const LATEX = "latex";
        const DELPHI = "delphi";

        static protected $langs = array (
                self::JAVA => "Java",
                self::PHP => "PHP",
                self::C => "C",
                self::CPP => "C++",
                self::HTML => "HTML",
                self::XML => "XML",
                self::VISUAL_BASIC => "Visual Basic",
                self::DELPHI => "Delphi"
        );

        static protected $v51_map = array(
                "php3" => "php",
                "java122" => "java",
                "html" => "html4strict"
        );

        protected $lang;

        protected function __construct($a_lang)
        {
                $this->lang = $a_lang;
        }

        public static function getInstance($a_lang)
        {
                return new self($a_lang);
        }

        public static function getSupportedLanguages()
        {
                return self::$langs;
        }

        public static function isSupported($a_lang)
        {
                return isset(self::$langs[$a_lang]);
        }

        public static function getNewLanguageId($a_old_lang_id)
        {
                if (isset(self::$v51_map[$a_old_lang_id]))
                {
                        return self::$v51_map[$a_old_lang_id];
                }
                return $a_old_lang_id;
        }


        public static function getSupportedLanguagesV51()
        {
                $langs = array();
                $map = array_flip(self::$v51_map);
                foreach (self::$langs as $k => $v)
                {
                        if (isset($map[$k]))
                        {
                                $k = $map[$k];
                        }
                        $langs[$k] = $v;
                }
                return $langs;
        }

        public function highlight($a_code)
        {
                include_once("./libs/composer/vendor/geshi/geshi/src/geshi.php");
                $geshi = new Geshi(html_entity_decode($a_code), $this->lang);

                //var_dump($geshi->get_supported_languages()); exit;

                //$geshi->set_header_type(GESHI_HEADER_NONE); // does not work as expected, see below
                $a_code = $geshi->parse_code();

                // remove geshi pre tag (setting GESHI_HEADER_NONE gives us undesired br tags)
                $a_code = substr($a_code, strpos($a_code, ">") + 1);
                $a_code = substr($a_code, 0, strrpos($a_code, "<"));

                return $a_code;
        }


}

?>