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

   1 <?php
   2
   3 require_once 'HTMLPurifier/AttrDef.php';
   4 require_once 'HTMLPurifier/AttrDef/HTML/Pixels.php';
   5
   6 /**
   7  * Validates the HTML type length (not to be confused with CSS's length).
   8  *
   9  * This accepts integer pixels or percentages as lengths for certain
  10  * HTML attributes.
  11  */
  12
  13 class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
  14 {
  15
  16     function validate($string, $config, &$context) {
  17
  18         $string = trim($string);
  19         if ($string === '') return false;
  20
  21         $parent_result = parent::validate($string, $config, $context);
  22         if ($parent_result !== false) return $parent_result;
  23
  24         $length = strlen($string);
  25         $last_char = $string[$length - 1];
  26
  27         if ($last_char !== '%') return false;
  28
  29         $points = substr($string, 0, $length - 1);
  30
  31         if (!is_numeric($points)) return false;
  32
  33         $points = (int) $points;
  34
  35         if ($points < 0) return '0%';
  36         if ($points > 100) return '100%';
  37
  38         return ((string) $points) . '%';
  39
  40     }
  41
  42 }
  43