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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      /**
  10       * @type string
  11       */
  12      protected $tag;
  13  
  14      /**
  15       * @type HTMLPurifier_AttrDef
  16       */
  17      protected $withTag;
  18  
  19      /**
  20       * @type HTMLPurifier_AttrDef
  21       */
  22      protected $withoutTag;
  23  
  24      /**
  25       * @param string $tag Tag name to switch upon
  26       * @param HTMLPurifier_AttrDef $with_tag Call if token matches tag
  27       * @param HTMLPurifier_AttrDef $without_tag Call if token doesn't match, or there is no token
  28       */
  29      public function __construct($tag, $with_tag, $without_tag)
  30      {
  31          $this->tag = $tag;
  32          $this->withTag = $with_tag;
  33          $this->withoutTag = $without_tag;
  34      }
  35  
  36      /**
  37       * @param string $string
  38       * @param HTMLPurifier_Config $config
  39       * @param HTMLPurifier_Context $context
  40       * @return bool|string
  41       */
  42      public function validate($string, $config, $context)
  43      {
  44          $token = $context->get('CurrentToken', true);
  45          if (!$token || $token->name !== $this->tag) {
  46              return $this->withoutTag->validate($string, $config, $context);
  47          } else {
  48              return $this->withTag->validate($string, $config, $context);
  49          }
  50      }
  51  }
  52  
  53  // vim: et sw=4 sts=4