1: <?php
2:
3: // Enum = Enumerated
4: /**
5: * Validates a keyword against a list of valid values.
6: * @warning The case-insensitive compare of this function uses PHP's
7: * built-in strtolower and ctype_lower functions, which may
8: * cause problems with international comparisons
9: */
10: class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
11: {
12:
13: /**
14: * Lookup table of valid values.
15: * @todo Make protected
16: */
17: public $valid_values = array();
18:
19: /**
20: * Bool indicating whether or not enumeration is case sensitive.
21: * @note In general this is always case insensitive.
22: */
23: protected $case_sensitive = false; // values according to W3C spec
24:
25: /**
26: * @param $valid_values List of valid values
27: * @param $case_sensitive Bool indicating whether or not case sensitive
28: */
29: public function __construct(
30: $valid_values = array(), $case_sensitive = false
31: ) {
32: $this->valid_values = array_flip($valid_values);
33: $this->case_sensitive = $case_sensitive;
34: }
35:
36: public function validate($string, $config, $context) {
37: $string = trim($string);
38: if (!$this->case_sensitive) {
39: // we may want to do full case-insensitive libraries
40: $string = ctype_lower($string) ? $string : strtolower($string);
41: }
42: $result = isset($this->valid_values[$string]);
43:
44: return $result ? $string : false;
45: }
46:
47: /**
48: * @param $string In form of comma-delimited list of case-insensitive
49: * valid values. Example: "foo,bar,baz". Prepend "s:" to make
50: * case sensitive
51: */
52: public function make($string) {
53: if (strlen($string) > 2 && $string[0] == 's' && $string[1] == ':') {
54: $string = substr($string, 2);
55: $sensitive = true;
56: } else {
57: $sensitive = false;
58: }
59: $values = explode(',', $string);
60: return new HTMLPurifier_AttrDef_Enum($values, $sensitive);
61: }
62:
63: }
64:
65: // vim: et sw=4 sts=4
66: