1: <?php
2:
3: class HTMLPurifier_AttrDef_CSS_AlphaValue extends HTMLPurifier_AttrDef_CSS_Number
4: {
5:
6: public function __construct()
7: {
8: parent::__construct(false); // opacity is non-negative, but we will clamp it
9: }
10:
11: /**
12: * @param string $number
13: * @param HTMLPurifier_Config $config
14: * @param HTMLPurifier_Context $context
15: * @return string
16: */
17: public function validate($number, $config, $context)
18: {
19: $result = parent::validate($number, $config, $context);
20: if ($result === false) {
21: return $result;
22: }
23: $float = (float)$result;
24: if ($float < 0.0) {
25: $result = '0';
26: }
27: if ($float > 1.0) {
28: $result = '1';
29: }
30: return $result;
31: }
32: }
33:
34: // vim: et sw=4 sts=4
35: