library/HTMLPurifier/ChildDef/Optional.php

   1 <?php
   2
   3 /**
   4  * Definition that allows a set of elements, and allows no children.
   5  * @note This is a hack to reuse code from HTMLPurifier_ChildDef_Required,
   6  *       really, one shouldn't inherit from the other.  Only altered behavior
   7  *       is to overload a returned false with an array.  Thus, it will never
   8  *       return false.
   9  */
  10 class HTMLPurifier_ChildDef_Optional extends HTMLPurifier_ChildDef_Required
  11 {
  12     public $allow_empty = true;
  13     public $type = 'optional';
  14     public function validateChildren($tokens_of_children, $config, $context) {
  15         $result = parent::validateChildren($tokens_of_children, $config, $context);
  16         // we assume that $tokens_of_children is not modified
  17         if ($result === false) {
  18             if (empty($tokens_of_children)) return true;
  19             elseif ($this->whitespace) return $tokens_of_children;
  20             else return array();
  21         }
  22         return $result;
  23     }
  24 }
  25
  26 // vim: et sw=4 sts=4