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

   1 <?php
   2
   3 require_once 'HTMLPurifier/AttrDef.php';
   4 require_once 'HTMLPurifier/AttrDef/HTML/Length.php';
   5
   6 /**
   7  * Validates a MultiLength as defined by the HTML spec.
   8  *
   9  * A multilength is either a integer (pixel count), a percentage, or
  10  * a relative number.
  11  */
  12 class HTMLPurifier_AttrDef_HTML_MultiLength extends HTMLPurifier_AttrDef_HTML_Length
  13 {
  14
  15     function validate($string, $config, &$context) {
  16
  17         $string = trim($string);
  18         if ($string === '') return false;
  19
  20         $parent_result = parent::validate($string, $config, $context);
  21         if ($parent_result !== false) return $parent_result;
  22
  23         $length = strlen($string);
  24         $last_char = $string[$length - 1];
  25
  26         if ($last_char !== '*') return false;
  27
  28         $int = substr($string, 0, $length - 1);
  29
  30         if ($int == '') return '*';
  31         if (!is_numeric($int)) return false;
  32
  33         $int = (int) $int;
  34
  35         if ($int < 0) return false;
  36         if ($int == 0) return '0';
  37         if ($int == 1) return '*';
  38         return ((string) $int) . '*';
  39
  40     }
  41
  42 }
  43