filter/tidy/filter.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * HTML  tidy text filter.
  20  *
  21  * @package    filter
  22  * @subpackage tiny
  23  * @copyright  2004 Hannes Gassert <hannes at mediagonal dot ch>
  24  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  */
  26
  27 defined('MOODLE_INTERNAL') || die();
  28
  29 // This class looks for text including markup and
  30 // applies tidy's repair function to it.
  31 // Tidy is a HTML clean and
  32 // repair utility, which is currently available for PHP 4.3.x and PHP 5 as a
  33 // PECL extension from http://pecl.php.net/package/tidy, in PHP 5 you need only
  34 // to compile using the --with-tidy option.
  35 // If you don't have the tidy extension installed or don't know, you can enable
  36 // or disable this filter, it just won't have any effect.
  37 // If you want to know what you can set in $tidyoptions and what their default
  38 // values are, see http://php.net/manual/en/function.tidy-get-config.php.
  39
  40 class filter_tidy extends moodle_text_filter {
  41     function filter($text, array $options = array()) {
  42
  43     /// Configuration for tidy. Feel free to tune for your needs, e.g. to allow
  44     /// proprietary markup.
  45         $tidyoptions = array(
  46                  'output-xhtml' => true,
  47                  'show-body-only' => true,
  48                  'tidy-mark' => false,
  49                  'drop-proprietary-attributes' => true,
  50                  'drop-font-tags' => true,
  51                  'drop-empty-paras' => true,
  52                  'indent' => true,
  53                  'quiet' => true,
  54         );
  55
  56     /// Do a quick check using strpos to avoid unnecessary work
  57         if (strpos($text, '<') === false) {
  58             return $text;
  59         }
  60
  61
  62     /// If enabled: run tidy over the entire string
  63         if (function_exists('tidy_repair_string')){
  64             $text = tidy_repair_string($text, $tidyoptions, 'utf8');
  65         }
  66
  67         return $text;
  68     }
  69 }
  70