library/HTMLPurifier/AttrDef/HTML/Class.php

   1 <?php
   2
   3 /**
   4  * Implements special behavior for class attribute (normally NMTOKENS)
   5  */
   6 class HTMLPurifier_AttrDef_HTML_Class extends HTMLPurifier_AttrDef_HTML_Nmtokens
   7 {
   8     protected function split($string, $config, $context) {
   9         // really, this twiddle should be lazy loaded
  10         $name = $config->getDefinition('HTML')->doctype->name;
  11         if ($name == "XHTML 1.1" || $name == "XHTML 2.0") {
  12             return parent::split($string, $config, $context);
  13         } else {
  14             return preg_split('/\s+/', $string);
  15         }
  16     }
  17     protected function filter($tokens, $config, $context) {
  18         $allowed = $config->get('Attr.AllowedClasses');
  19         $forbidden = $config->get('Attr.ForbiddenClasses');
  20         $ret = array();
  21         foreach ($tokens as $token) {
  22             if (
  23                 ($allowed === null || isset($allowed[$token])) &&
  24                 !isset($forbidden[$token]) &&
  25                 // We need this O(n) check because of PHP's array
  26                 // implementation that casts -0 to 0.
  27                 !in_array($token, $ret, true)
  28             ) {
  29                 $ret[] = $token;
  30             }
  31         }
  32         return $ret;
  33     }
  34 }