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 1 : 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 0 : $string = $this->parseCDATA($string);
40 0 : if ($string === '') return false;
41 0 : $parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
42 0 : $length = count($parts);
43 0 : $final = '';
44 0 : for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
45 0 : if (ctype_space($parts[$i])) continue;
46 0 : $result = $this->single->validate($parts[$i], $config, $context);
47 0 : if ($result !== false) {
48 0 : $final .= $result . ' ';
49 0 : $num++;
50 0 : }
51 0 : }
52 0 : if ($final === '') return false;
53 0 : return rtrim($final);
54 : }
55 :
56 : }
57 :
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