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   1  <?php
   2  
   3  /**
   4   * Validates a MultiLength as defined by the HTML spec.
   5   *
   6   * A multilength is either a integer (pixel count), a percentage, or
   7   * a relative number.
   8   */
   9  class HTMLPurifier_AttrDef_HTML_MultiLength extends HTMLPurifier_AttrDef_HTML_Length
  10  {
  11  
  12      public function validate($string, $config, $context) {
  13  
  14          $string = trim($string);
  15          if ($string === '') return false;
  16  
  17          $parent_result = parent::validate($string, $config, $context);
  18          if ($parent_result !== false) return $parent_result;
  19  
  20          $length = strlen($string);
  21          $last_char = $string[$length - 1];
  22  
  23          if ($last_char !== '*') return false;
  24  
  25          $int = substr($string, 0, $length - 1);
  26  
  27          if ($int == '') return '*';
  28          if (!is_numeric($int)) return false;
  29  
  30          $int = (int) $int;
  31  
  32          if ($int < 0) return false;
  33          if ($int == 0) return '0';
  34          if ($int == 1) return '*';
  35          return ((string) $int) . '*';
  36  
  37      }
  38  
  39  }
  40  
  41  // vim: et sw=4 sts=4