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-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/HTML/Nmtokens.php70
1 files changed, 70 insertions, 0 deletions
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/HTML/Nmtokens.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/HTML/Nmtokens.php
new file mode 100644
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+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/HTML/Nmtokens.php
@@ -0,0 +1,70 @@
1<?php
2
3/**
4 * Validates contents based on NMTOKENS attribute type.
5 */
6class HTMLPurifier_AttrDef_HTML_Nmtokens extends HTMLPurifier_AttrDef
7{
8
9 /**
10 * @param string $string
11 * @param HTMLPurifier_Config $config
12 * @param HTMLPurifier_Context $context
13 * @return bool|string
14 */
15 public function validate($string, $config, $context)
16 {
17 $string = trim($string);
18
19 // early abort: '' and '0' (strings that convert to false) are invalid
20 if (!$string) {
21 return false;
22 }
23
24 $tokens = $this->split($string, $config, $context);
25 $tokens = $this->filter($tokens, $config, $context);
26 if (empty($tokens)) {
27 return false;
28 }
29 return implode(' ', $tokens);
30 }
31
32 /**
33 * Splits a space separated list of tokens into its constituent parts.
34 * @param string $string
35 * @param HTMLPurifier_Config $config
36 * @param HTMLPurifier_Context $context
37 * @return array
38 */
39 protected function split($string, $config, $context)
40 {
41 // OPTIMIZABLE!
42 // do the preg_match, capture all subpatterns for reformulation
43
44 // we don't support U+00A1 and up codepoints or
45 // escaping because I don't know how to do that with regexps
46 // and plus it would complicate optimization efforts (you never
47 // see that anyway).
48 $pattern = '/(?:(?<=\s)|\A)' . // look behind for space or string start
49 '((?:--|-?[A-Za-z_])[A-Za-z_\-0-9]*)' .
50 '(?:(?=\s)|\z)/'; // look ahead for space or string end
51 preg_match_all($pattern, $string, $matches);
52 return $matches[1];
53 }
54
55 /**
56 * Template method for removing certain tokens based on arbitrary criteria.
57 * @note If we wanted to be really functional, we'd do an array_filter
58 * with a callback. But... we're not.
59 * @param array $tokens
60 * @param HTMLPurifier_Config $config
61 * @param HTMLPurifier_Context $context
62 * @return array
63 */
64 protected function filter($tokens, $config, $context)
65 {
66 return $tokens;
67 }
68}
69
70// vim: et sw=4 sts=4