File indexing completed on 2024-05-26 06:02:31

 <?php
 
 /**
  * Validates a color according to the HTML spec.
  */
 class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
 {
 
     /**
      * @param string $string
      * @param HTMLPurifier_Config $config
      * @param HTMLPurifier_Context $context
      * @return bool|string
      */
     public function validate($string, $config, $context)
     {
         static $colors = null;
         if ($colors === null) {
             $colors = $config->get('Core.ColorKeywords');
         }
 
         $string = trim($string);
 
         if (empty($string)) {
             return false;
         }
         $lower = strtolower($string);
         if (isset($colors[$lower])) {
             return $colors[$lower];
         }
         if ($string[0] === '#') {
             $hex = substr($string, 1);
         } else {
             $hex = $string;
         }
 
         $length = strlen($hex);
         if ($length !== 3 && $length !== 6) {
             return false;
         }
         if (!ctype_xdigit($hex)) {
             return false;
         }
         if ($length === 3) {
             $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
         }
         return "#$hex";
     }
 }
 
 // vim: et sw=4 sts=4