1 : <?php
2 :
3 : /**
4 : * Validates shorthand CSS property list-style.
5 : * @warning Does not support url tokens that have internal spaces.
6 : */
7 1 : class HTMLPurifier_AttrDef_CSS_ListStyle extends HTMLPurifier_AttrDef
8 : {
9 :
10 : /**
11 : * Local copy of component validators.
12 : * @note See HTMLPurifier_AttrDef_CSS_Font::$info for a similar impl.
13 : */
14 : protected $info;
15 :
16 : public function __construct($config) {
17 : $def = $config->getCSSDefinition();
18 : $this->info['list-style-type'] = $def->info['list-style-type'];
19 : $this->info['list-style-position'] = $def->info['list-style-position'];
20 : $this->info['list-style-image'] = $def->info['list-style-image'];
21 : }
22 :
23 : public function validate($string, $config, $context) {
24 :
25 : // regular pre-processing
26 0 : $string = $this->parseCDATA($string);
27 0 : if ($string === '') return false;
28 :
29 : // assumes URI doesn't have spaces in it
30 0 : $bits = explode(' ', strtolower($string)); // bits to process
31 :
32 0 : $caught = array();
33 0 : $caught['type'] = false;
34 0 : $caught['position'] = false;
35 0 : $caught['image'] = false;
36 :
37 0 : $i = 0; // number of catches
38 0 : $none = false;
39 :
40 0 : foreach ($bits as $bit) {
41 0 : if ($i >= 3) return; // optimization bit
42 0 : if ($bit === '') continue;
43 0 : foreach ($caught as $key => $status) {
44 0 : if ($status !== false) continue;
45 0 : $r = $this->info['list-style-' . $key]->validate($bit, $config, $context);
46 0 : if ($r === false) continue;
47 0 : if ($r === 'none') {
48 0 : if ($none) continue;
49 0 : else $none = true;
50 0 : if ($key == 'image') continue;
51 0 : }
52 0 : $caught[$key] = $r;
53 0 : $i++;
54 0 : break;
55 0 : }
56 0 : }
57 :
58 0 : if (!$i) return false;
59 :
60 0 : $ret = array();
61 :
62 : // construct type
63 0 : if ($caught['type']) $ret[] = $caught['type'];
64 :
65 : // construct image
66 0 : if ($caught['image']) $ret[] = $caught['image'];
67 :
68 : // construct position
69 0 : if ($caught['position']) $ret[] = $caught['position'];
70 :
71 0 : if (empty($ret)) return false;
72 0 : return implode(' ', $ret);
73 :
74 : }
75 :
76 : }
77 :
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