4 * Validates the HTML type length (not to be confused with CSS's length).
6 * This accepts integer pixels or percentages as lengths for certain
10 class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
13 public function validate($string, $config, $context) {
15 $string = trim($string);
16 if ($string === '') return false;
18 $parent_result = parent::validate($string, $config, $context);
19 if ($parent_result !== false) return $parent_result;
21 $length = strlen($string);
22 $last_char = $string[$length - 1];
24 if ($last_char !== '%') return false;
26 $points = substr($string, 0, $length - 1);
28 if (!is_numeric($points)) return false;
30 $points = (int) $points;
32 if ($points < 0) return '0%';
33 if ($points > 100) return '100%';
35 return ((string) $points) . '%';