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dcfffe3072
The only option passed at the moment is the original format in which the user inserted the text. Other options can be added later if/when needed.
111 lines
4 KiB
PHP
111 lines
4 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* @package filter
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* @subpackage multilang
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* @copyright Gaetan Frenoy <gaetan@frenoy.net>
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* @copyright 2004 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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// Given XML multilinguage text, return relevant text according to
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// current language:
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// - look for multilang blocks in the text.
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// - if there exists texts in the currently active language, print them.
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// - else, if there exists texts in the current parent language, print them.
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// - else, print the first language in the text.
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// Please note that English texts are not used as default anymore!
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//
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// This version is based on original multilang filter by Gaetan Frenoy,
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// rewritten by Eloy and skodak.
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//
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// Following new syntax is not compatible with old one:
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// <span lang="XX" class="multilang">one lang</span><span lang="YY" class="multilang">another language</span>
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class filter_multilang extends moodle_text_filter {
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function filter($text, array $options = array()) {
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global $CFG;
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// [pj] I don't know about you but I find this new implementation funny :P
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// [skodak] I was laughing while rewriting it ;-)
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// [nicolasconnault] Should support inverted attributes: <span class="multilang" lang="en"> (Doesn't work curently)
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// [skodak] it supports it now, though it is slower - any better idea?
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if (empty($text) or is_numeric($text)) {
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return $text;
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}
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if (empty($CFG->filter_multilang_force_old) and !empty($CFG->filter_multilang_converted)) {
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// new syntax
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$search = '/(<span(\s+lang="[a-zA-Z0-9_-]+"|\s+class="multilang"){2}\s*>.*?<\/span>)(\s*<span(\s+lang="[a-zA-Z0-9_-]+"|\s+class="multilang"){2}\s*>.*?<\/span>)+/is';
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} else {
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// old syntax
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$search = '/(<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.*?<\/(?:lang|span)>)(\s*<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.*?<\/(?:lang|span)>)+/is';
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}
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$result = preg_replace_callback($search, 'filter_multilang_impl', $text);
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if (is_null($result)) {
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return $text; //error during regex processing (too many nested spans?)
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} else {
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return $result;
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}
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}
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}
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function filter_multilang_impl($langblock) {
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global $CFG;
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$mylang = current_language();
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static $parentcache;
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if (!isset($parentcache)) {
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$parentcache = array();
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}
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if (!array_key_exists($mylang, $parentcache)) {
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$parentlang = get_parent_language($mylang);
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$parentcache[$mylang] = $parentlang;
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} else {
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$parentlang = $parentcache[$mylang];
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}
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$searchtosplit = '/<(?:lang|span)[^>]+lang="([a-zA-Z0-9_-]+)"[^>]*>(.*?)<\/(?:lang|span)>/is';
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if (!preg_match_all($searchtosplit, $langblock[0], $rawlanglist)) {
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//skip malformed blocks
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return $langblock[0];
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}
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$langlist = array();
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foreach ($rawlanglist[1] as $index=>$lang) {
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$lang = str_replace('-','_',strtolower($lang)); // normalize languages
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$langlist[$lang] = $rawlanglist[2][$index];
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}
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if (array_key_exists($mylang, $langlist)) {
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return $langlist[$mylang];
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} else if (array_key_exists($parentlang, $langlist)) {
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return $langlist[$parentlang];
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} else {
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$first = array_shift($langlist);
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return $first;
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}
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}
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