1: <?php
2:
3: /**
4: * Framework class for strings that involve multiple values.
5: *
6: * Certain CSS properties such as border-width and margin allow multiple
7: * lengths to be specified. This class can take a vanilla border-width
8: * definition and multiply it, usually into a max of four.
9: *
10: * @note Even though the CSS specification isn't clear about it, inherit
11: * can only be used alone: it will never manifest as part of a multi
12: * shorthand declaration. Thus, this class does not allow inherit.
13: */
14: class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
15: {
16:
17: /**
18: * Instance of component definition to defer validation to.
19: * @todo Make protected
20: */
21: public $single;
22:
23: /**
24: * Max number of values allowed.
25: * @todo Make protected
26: */
27: public $max;
28:
29: /**
30: * @param $single HTMLPurifier_AttrDef to multiply
31: * @param $max Max number of values allowed (usually four)
32: */
33: public function __construct($single, $max = 4) {
34: $this->single = $single;
35: $this->max = $max;
36: }
37:
38: public function validate($string, $config, $context) {
39: $string = $this->parseCDATA($string);
40: if ($string === '') return false;
41: $parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
42: $length = count($parts);
43: $final = '';
44: for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
45: if (ctype_space($parts[$i])) continue;
46: $result = $this->single->validate($parts[$i], $config, $context);
47: if ($result !== false) {
48: $final .= $result . ' ';
49: $num++;
50: }
51: }
52: if ($final === '') return false;
53: return rtrim($final);
54: }
55:
56: }
57:
58: // vim: et sw=4 sts=4
59: