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

   1 <?php
   2
   3 /**
   4  * Validates the HTML type length (not to be confused with CSS's length).
   5  *
   6  * This accepts integer pixels or percentages as lengths for certain
   7  * HTML attributes.
   8  */
   9
  10 class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
  11 {
  12
  13     public function validate($string, $config, $context) {
  14
  15         $string = trim($string);
  16         if ($string === '') return false;
  17
  18         $parent_result = parent::validate($string, $config, $context);
  19         if ($parent_result !== false) return $parent_result;
  20
  21         $length = strlen($string);
  22         $last_char = $string[$length - 1];
  23
  24         if ($last_char !== '%') return false;
  25
  26         $points = substr($string, 0, $length - 1);
  27
  28         if (!is_numeric($points)) return false;
  29
  30         $points = (int) $points;
  31
  32         if ($points < 0) return '0%';
  33         if ($points > 100) return '100%';
  34
  35         return ((string) $points) . '%';
  36
  37     }
  38
  39 }
  40
  41 // vim: et sw=4 sts=4