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   1  <?php
   2  
   3  class HTMLPurifier_AttrDef_CSS_AlphaValue extends HTMLPurifier_AttrDef_CSS_Number
   4  {
   5  
   6      public function __construct()
   7      {
   8          parent::__construct(false); // opacity is non-negative, but we will clamp it
   9      }
  10  
  11      /**
  12       * @param string $number
  13       * @param HTMLPurifier_Config $config
  14       * @param HTMLPurifier_Context $context
  15       * @return string
  16       */
  17      public function validate($number, $config, $context)
  18      {
  19          $result = parent::validate($number, $config, $context);
  20          if ($result === false) {
  21              return $result;
  22          }
  23          $float = (float)$result;
  24          if ($float < 0.0) {
  25              $result = '0';
  26          }
  27          if ($float > 1.0) {
  28              $result = '1';
  29          }
  30          return $result;
  31      }
  32  }
  33  
  34  // vim: et sw=4 sts=4