ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
Required.php
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1<?php
2
7{
12 public $elements = array();
13
18 protected $whitespace = false;
19
23 public function __construct($elements)
24 {
25 if (is_string($elements)) {
26 $elements = str_replace(' ', '', $elements);
27 $elements = explode('|', $elements);
28 }
29 $keys = array_keys($elements);
30 if ($keys == array_keys($keys)) {
31 $elements = array_flip($elements);
32 foreach ($elements as $i => $x) {
33 $elements[$i] = true;
34 if (empty($i)) {
35 unset($elements[$i]);
36 } // remove blank
37 }
38 }
39 $this->elements = $elements;
40 }
41
45 public $allow_empty = false;
46
50 public $type = 'required';
51
58 public function validateChildren($children, $config, $context)
59 {
60 // Flag for subclasses
61 $this->whitespace = false;
62
63 // if there are no tokens, delete parent node
64 if (empty($children)) {
65 return false;
66 }
67
68 // the new set of children
69 $result = array();
70
71 // whether or not parsed character data is allowed
72 // this controls whether or not we silently drop a tag
73 // or generate escaped HTML from it
74 $pcdata_allowed = isset($this->elements['#PCDATA']);
75
76 // a little sanity check to make sure it's not ALL whitespace
77 $all_whitespace = true;
78
79 $stack = array_reverse($children);
80 while (!empty($stack)) {
81 $node = array_pop($stack);
82 if (!empty($node->is_whitespace)) {
83 $result[] = $node;
84 continue;
85 }
86 $all_whitespace = false; // phew, we're not talking about whitespace
87
88 if (!isset($this->elements[$node->name])) {
89 // special case text
90 // XXX One of these ought to be redundant or something
91 if ($pcdata_allowed && $node instanceof HTMLPurifier_Node_Text) {
92 $result[] = $node;
93 continue;
94 }
95 // spill the child contents in
96 // ToDo: Make configurable
97 if ($node instanceof HTMLPurifier_Node_Element) {
98 for ($i = count($node->children) - 1; $i >= 0; $i--) {
99 $stack[] = $node->children[$i];
100 }
101 continue;
102 }
103 continue;
104 }
105 $result[] = $node;
106 }
107 if (empty($result)) {
108 return false;
109 }
110 if ($all_whitespace) {
111 $this->whitespace = true;
112 return false;
113 }
114 return $result;
115 }
116}
117
118// vim: et sw=4 sts=4
$result
Definition that allows a set of elements, but disallows empty children.
Definition: Required.php:7
validateChildren($children, $config, $context)
Definition: Required.php:58
$whitespace
Whether or not the last passed node was all whitespace.
Definition: Required.php:18
$elements
Lookup table of allowed elements.
Definition: Required.php:12
Defines allowed child nodes and validates nodes against it.
Definition: ChildDef.php:7
Concrete element node class.
Definition: Element.php:7
Concrete text token class.
Definition: Text.php:13
$x
Definition: example_009.php:98