. /** * @package filter * @subpackage multilang * @copyright Gaetan Frenoy * @copyright 2004 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com} * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ defined('MOODLE_INTERNAL') || die(); // Given XML multilinguage text, return relevant text according to // current language: // - look for multilang blocks in the text. // - if there exists texts in the currently active language, print them. // - else, if there exists texts in the current parent language, print them. // - else, print the first language in the text. // Please note that English texts are not used as default anymore! // // This version is based on original multilang filter by Gaetan Frenoy, // rewritten by Eloy and skodak. // // Following new syntax is not compatible with old one: // one langanother language class filter_multilang extends moodle_text_filter { function filter($text, array $options = array()) { global $CFG; // [pj] I don't know about you but I find this new implementation funny :P // [skodak] I was laughing while rewriting it ;-) // [nicolasconnault] Should support inverted attributes: (Doesn't work curently) // [skodak] it supports it now, though it is slower - any better idea? if (empty($text) or is_numeric($text)) { return $text; } if (empty($CFG->filter_multilang_force_old) and !empty($CFG->filter_multilang_converted)) { // new syntax $search = '/(.*?<\/span>)(\s*.*?<\/span>)+/is'; } else { // old syntax $search = '/(<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.*?<\/(?:lang|span)>)(\s*<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.*?<\/(?:lang|span)>)+/is'; } $result = preg_replace_callback($search, 'filter_multilang_impl', $text); if (is_null($result)) { return $text; //error during regex processing (too many nested spans?) } else { return $result; } } } function filter_multilang_impl($langblock) { global $CFG; $mylang = current_language(); static $parentcache; if (!isset($parentcache)) { $parentcache = array(); } if (!array_key_exists($mylang, $parentcache)) { $parentlang = get_parent_language($mylang); $parentcache[$mylang] = $parentlang; } else { $parentlang = $parentcache[$mylang]; } $searchtosplit = '/<(?:lang|span)[^>]+lang="([a-zA-Z0-9_-]+)"[^>]*>(.*?)<\/(?:lang|span)>/is'; if (!preg_match_all($searchtosplit, $langblock[0], $rawlanglist)) { //skip malformed blocks return $langblock[0]; } $langlist = array(); foreach ($rawlanglist[1] as $index=>$lang) { $lang = str_replace('-','_',strtolower($lang)); // normalize languages $langlist[$lang] = $rawlanglist[2][$index]; } if (array_key_exists($mylang, $langlist)) { return $langlist[$mylang]; } else if (array_key_exists($parentlang, $langlist)) { return $langlist[$parentlang]; } else { $first = array_shift($langlist); return $first; } }