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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       */
  11      protected $attr;
  12  
  13      /**
  14       * CSS declarations to add to style, needs trailing semicolon
  15       */
  16      protected $css;
  17  
  18      /**
  19       * @param $attr string attribute name to convert from
  20       * @param $css string CSS declarations to add to style (needs semicolon)
  21       */
  22      public function __construct($attr, $css) {
  23          $this->attr = $attr;
  24          $this->css  = $css;
  25      }
  26  
  27      public function transform($attr, $config, $context) {
  28          if (!isset($attr[$this->attr])) return $attr;
  29          unset($attr[$this->attr]);
  30          $this->prependCSS($attr, $this->css);
  31          return $attr;
  32      }
  33  
  34  }
  35  
  36  // vim: et sw=4 sts=4