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-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/ChildDef/Custom.php102
1 files changed, 102 insertions, 0 deletions
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/ChildDef/Custom.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/ChildDef/Custom.php
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+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/ChildDef/Custom.php
@@ -0,0 +1,102 @@
1<?php
2
3/**
4 * Custom validation class, accepts DTD child definitions
5 *
6 * @warning Currently this class is an all or nothing proposition, that is,
7 * it will only give a bool return value.
8 */
9class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
10{
11 /**
12 * @type string
13 */
14 public $type = 'custom';
15
16 /**
17 * @type bool
18 */
19 public $allow_empty = false;
20
21 /**
22 * Allowed child pattern as defined by the DTD.
23 * @type string
24 */
25 public $dtd_regex;
26
27 /**
28 * PCRE regex derived from $dtd_regex.
29 * @type string
30 */
31 private $_pcre_regex;
32
33 /**
34 * @param $dtd_regex Allowed child pattern from the DTD
35 */
36 public function __construct($dtd_regex)
37 {
38 $this->dtd_regex = $dtd_regex;
39 $this->_compileRegex();
40 }
41
42 /**
43 * Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
44 */
45 protected function _compileRegex()
46 {
47 $raw = str_replace(' ', '', $this->dtd_regex);
48 if ($raw{0} != '(') {
49 $raw = "($raw)";
50 }
51 $el = '[#a-zA-Z0-9_.-]+';
52 $reg = $raw;
53
54 // COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M
55 // DOING! Seriously: if there's problems, please report them.
56
57 // collect all elements into the $elements array
58 preg_match_all("/$el/", $reg, $matches);
59 foreach ($matches[0] as $match) {
60 $this->elements[$match] = true;
61 }
62
63 // setup all elements as parentheticals with leading commas
64 $reg = preg_replace("/$el/", '(,\\0)', $reg);
65
66 // remove commas when they were not solicited
67 $reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg);
68
69 // remove all non-paranthetical commas: they are handled by first regex
70 $reg = preg_replace("/,\(/", '(', $reg);
71
72 $this->_pcre_regex = $reg;
73 }
74
75 /**
76 * @param HTMLPurifier_Node[] $children
77 * @param HTMLPurifier_Config $config
78 * @param HTMLPurifier_Context $context
79 * @return bool
80 */
81 public function validateChildren($children, $config, $context)
82 {
83 $list_of_children = '';
84 $nesting = 0; // depth into the nest
85 foreach ($children as $node) {
86 if (!empty($node->is_whitespace)) {
87 continue;
88 }
89 $list_of_children .= $node->name . ',';
90 }
91 // add leading comma to deal with stray comma declarations
92 $list_of_children = ',' . rtrim($list_of_children, ',');
93 $okay =
94 preg_match(
95 '/^,?' . $this->_pcre_regex . '$/',
96 $list_of_children
97 );
98 return (bool)$okay;
99 }
100}
101
102// vim: et sw=4 sts=4