lib/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/MultiLength.php

   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