ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
Custom.php
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1<?php
2
10{
14 public $type = 'custom';
15
19 public $allow_empty = false;
20
25 public $dtd_regex;
26
31 private $_pcre_regex;
32
36 public function __construct($dtd_regex)
37 {
38 $this->dtd_regex = $dtd_regex;
39 $this->_compileRegex();
40 }
41
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 = $reg;
73 }
74
81 public function validateChildren($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
Custom validation class, accepts DTD child definitions.
Definition: Custom.php:10
$_pcre_regex
PCRE regex derived from $dtd_regex.
Definition: Custom.php:31
_compileRegex()
Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
Definition: Custom.php:45
$dtd_regex
Allowed child pattern as defined by the DTD.
Definition: Custom.php:25
validateChildren($children, $config, $context)
Definition: Custom.php:81
Defines allowed child nodes and validates nodes against it.
Definition: ChildDef.php:7