class.ilHtmlPurifierAbstractLibWrapper.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Services/Html/HtmlPurifier/library/HTMLPurifier.safe-includes.php';
require_once 'Services/Html/interfaces/interface.ilHtmlPurifierInterface.php';

abstract class ilHtmlPurifierAbstractLibWrapper implements ilHtmlPurifierInterface
{
        
        protected $oPurifier = null;
        
        public function __construct()
        {               
                $this->setPurifier(
                        new HTMLPurifier($this->getPurifierConfigInstance())
                );
        }
        
        final public function purify($a_html, $a_config = null)
        {
                return $this->oPurifier->purify($a_html, $a_config);
        }
        
        final public function purifyArray(Array $a_array_of_html, $a_config = null)
        {               
                return $this->oPurifier->purifyArray($a_array_of_html, $a_config);
        }
        
        abstract protected function getPurifierConfigInstance();
        
        protected function setPurifier(HTMLPurifier $oPurifier)
        {
                $this->oPurifier = $oPurifier;
                return $this;
        }
        
        protected function getPurifier()
        {
                return $this->oPurifier;
        }
        
        final static public function _getCacheDirectory()
        {
                if(!file_exists(ilUtil::getDataDir().'/HTMLPurifier') ||
                   !is_dir(ilUtil::getDataDir().'/HTMLPurifier'))
                {
                        ilUtil::makeDirParents(ilUtil::getDataDir().'/HTMLPurifier');
                }
                
                return ilUtil::getDataDir().'/HTMLPurifier';
        }
        
        final protected function removeUnsupportedElements($a_array)
        {
                $supportedElements = array();
                
                $notSupportedTags = array(
                        'rp',
                        'rt',
                        'rb',
                        'rtc',
                        'rbc',
                        'ruby',
                        'u',
                        'strike',
                        'param',
                        'object'
                );
                
                foreach($a_array as $element)
                {
                        if(!in_array($element, $notSupportedTags))
                        {
                                $supportedElements[] = $element;
                        }
                }

                return $supportedElements;
        }
        
        protected function makeElementListTinyMceCompliant($elements)
        {
                // Bugfix #5945: Necessary because TinyMCE does not use the "u" 
                // html element but <span style="text-decoration: underline">E</span>
                
                if( in_array('u', $elements) && !in_array('span', $elements) )
                {
                        $elements[] = 'span';
                }
                
                return $elements;
        }
}
?>