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   1  <?php
   2  
   3  /**
   4   * Decorator that, depending on a token, switches between two definitions.
   5   */
   6  class HTMLPurifier_AttrDef_Switch
   7  {
   8  
   9      protected $tag;
  10      protected $withTag, $withoutTag;
  11  
  12      /**
  13       * @param string $tag Tag name to switch upon
  14       * @param HTMLPurifier_AttrDef $with_tag Call if token matches tag
  15       * @param HTMLPurifier_AttrDef $without_tag Call if token doesn't match, or there is no token
  16       */
  17      public function __construct($tag, $with_tag, $without_tag) {
  18          $this->tag = $tag;
  19          $this->withTag = $with_tag;
  20          $this->withoutTag = $without_tag;
  21      }
  22  
  23      public function validate($string, $config, $context) {
  24          $token = $context->get('CurrentToken', true);
  25          if (!$token || $token->name !== $this->tag) {
  26              return $this->withoutTag->validate($string, $config, $context);
  27          } else {
  28              return $this->withTag->validate($string, $config, $context);
  29          }
  30      }
  31  
  32  }
  33  
  34  // vim: et sw=4 sts=4