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     /**
  13      * @param string $string
  14      * @param HTMLPurifier_Config $config
  15      * @param HTMLPurifier_Context $context
  16      * @return bool|string
  17      */
  18     public function validate($string, $config, $context)
  19     {
  20         $string = trim($string);
  21         if ($string === '') {
  22             return false;
  23         }
  24
  25         $parent_result = parent::validate($string, $config, $context);
  26         if ($parent_result !== false) {
  27             return $parent_result;
  28         }
  29
  30         $length = strlen($string);
  31         $last_char = $string[$length - 1];
  32
  33         if ($last_char !== '*') {
  34             return false;
  35         }
  36
  37         $int = substr($string, 0, $length - 1);
  38
  39         if ($int == '') {
  40             return '*';
  41         }
  42         if (!is_numeric($int)) {
  43             return false;
  44         }
  45
  46         $int = (int)$int;
  47         if ($int < 0) {
  48             return false;
  49         }
  50         if ($int == 0) {
  51             return '0';
  52         }
  53         if ($int == 1) {
  54             return '*';
  55         }
  56         return ((string)$int) . '*';
  57     }
  58 }
  59
  60 // vim: et sw=4 sts=4