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   1  <?php
   2  
   3  /**
   4   * Pre-transform that changes converts a boolean attribute to fixed CSS
   5   */
   6  class HTMLPurifier_AttrTransform_BoolToCSS extends HTMLPurifier_AttrTransform
   7  {
   8      /**
   9       * Name of boolean attribute that is trigger.
  10       * @type string
  11       */
  12      protected $attr;
  13  
  14      /**
  15       * CSS declarations to add to style, needs trailing semicolon.
  16       * @type string
  17       */
  18      protected $css;
  19  
  20      /**
  21       * @param string $attr attribute name to convert from
  22       * @param string $css CSS declarations to add to style (needs semicolon)
  23       */
  24      public function __construct($attr, $css)
  25      {
  26          $this->attr = $attr;
  27          $this->css = $css;
  28      }
  29  
  30      /**
  31       * @param array $attr
  32       * @param HTMLPurifier_Config $config
  33       * @param HTMLPurifier_Context $context
  34       * @return array
  35       */
  36      public function transform($attr, $config, $context)
  37      {
  38          if (!isset($attr[$this->attr])) {
  39              return $attr;
  40          }
  41          unset($attr[$this->attr]);
  42          $this->prependCSS($attr, $this->css);
  43          return $attr;
  44      }
  45  }
  46  
  47  // vim: et sw=4 sts=4