1 : <?php
2 :
3 : /**
4 : * Validates a Percentage as defined by the CSS spec.
5 : */
6 1 : class HTMLPurifier_AttrDef_CSS_Percentage extends HTMLPurifier_AttrDef
7 : {
8 :
9 : /**
10 : * Instance of HTMLPurifier_AttrDef_CSS_Number to defer number validation
11 : */
12 : protected $number_def;
13 :
14 : /**
15 : * @param Bool indicating whether to forbid negative values
16 : */
17 : public function __construct($non_negative = false) {
18 : $this->number_def = new HTMLPurifier_AttrDef_CSS_Number($non_negative);
19 : }
20 :
21 : public function validate($string, $config, $context) {
22 :
23 0 : $string = $this->parseCDATA($string);
24 :
25 0 : if ($string === '') return false;
26 0 : $length = strlen($string);
27 0 : if ($length === 1) return false;
28 0 : if ($string[$length - 1] !== '%') return false;
29 :
30 0 : $number = substr($string, 0, $length - 1);
31 0 : $number = $this->number_def->validate($number, $config, $context);
32 :
33 0 : if ($number === false) return false;
34 0 : return "$number%";
35 :
36 : }
37 :
38 : }
39 :
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