4 * Validates an integer representation of pixels according to the HTML spec.
6 class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef
11 public function __construct($max = null) {
15 public function validate($string, $config, $context) {
17 $string = trim($string);
18 if ($string === '0') return $string;
19 if ($string === '') return false;
20 $length = strlen($string);
21 if (substr($string, $length - 2) == 'px') {
22 $string = substr($string, 0, $length - 2);
24 if (!is_numeric($string)) return false;
27 if ($int < 0) return '0';
29 // upper-bound value, extremely high values can
30 // crash operating systems, see <http://ha.ckers.org/imagecrash.html>
31 // WARNING, above link WILL crash you if you're using Windows
33 if ($this->max !== null && $int > $this->max) return (string) $this->max;
39 public function make($string) {
40 if ($string === '') $max = null;
41 else $max = (int) $string;
42 $class = get_class($this);
43 return new $class($max);