library/HTMLPurifier/AttrDef/CSS/TextDecoration.php

   1 <?php
   2
   3 /**
   4  * Validates the value for the CSS property text-decoration
   5  * @note This class could be generalized into a version that acts sort of
   6  *       like Enum except you can compound the allowed values.
   7  */
   8 class HTMLPurifier_AttrDef_CSS_TextDecoration extends HTMLPurifier_AttrDef
   9 {
  10
  11     public function validate($string, $config, $context) {
  12
  13         static $allowed_values = array(
  14             'line-through' => true,
  15             'overline' => true,
  16             'underline' => true,
  17         );
  18
  19         $string = strtolower($this->parseCDATA($string));
  20
  21         if ($string === 'none') return $string;
  22
  23         $parts = explode(' ', $string);
  24         $final = '';
  25         foreach ($parts as $part) {
  26             if (isset($allowed_values[$part])) {
  27                 $final .= $part . ' ';
  28             }
  29         }
  30         $final = rtrim($final);
  31         if ($final === '') return false;
  32         return $final;
  33
  34     }
  35
  36 }
  37