XOOPS 2.5.6  Final
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Custom.php
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1 <?php
2 
10 {
11  public $type = 'custom';
12  public $allow_empty = false;
16  public $dtd_regex;
21  private $_pcre_regex;
25  public function __construct($dtd_regex) {
26  $this->dtd_regex = $dtd_regex;
27  $this->_compileRegex();
28  }
32  protected function _compileRegex() {
33  $raw = str_replace(' ', '', $this->dtd_regex);
34  if ($raw{0} != '(') {
35  $raw = "($raw)";
36  }
37  $el = '[#a-zA-Z0-9_.-]+';
38  $reg = $raw;
39 
40  // COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M
41  // DOING! Seriously: if there's problems, please report them.
42 
43  // collect all elements into the $elements array
44  preg_match_all("/$el/", $reg, $matches);
45  foreach ($matches[0] as $match) {
46  $this->elements[$match] = true;
47  }
48 
49  // setup all elements as parentheticals with leading commas
50  $reg = preg_replace("/$el/", '(,\\0)', $reg);
51 
52  // remove commas when they were not solicited
53  $reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg);
54 
55  // remove all non-paranthetical commas: they are handled by first regex
56  $reg = preg_replace("/,\(/", '(', $reg);
57 
58  $this->_pcre_regex = $reg;
59  }
60  public function validateChildren($tokens_of_children, $config, $context) {
61  $list_of_children = '';
62  $nesting = 0; // depth into the nest
63  foreach ($tokens_of_children as $token) {
64  if (!empty($token->is_whitespace)) continue;
65 
66  $is_child = ($nesting == 0); // direct
67 
68  if ($token instanceof HTMLPurifier_Token_Start) {
69  $nesting++;
70  } elseif ($token instanceof HTMLPurifier_Token_End) {
71  $nesting--;
72  }
73 
74  if ($is_child) {
75  $list_of_children .= $token->name . ',';
76  }
77  }
78  // add leading comma to deal with stray comma declarations
79  $list_of_children = ',' . rtrim($list_of_children, ',');
80  $okay =
81  preg_match(
82  '/^,?'.$this->_pcre_regex.'$/',
83  $list_of_children
84  );
85 
86  return (bool) $okay;
87  }
88 }
89 
90 // vim: et sw=4 sts=4