ILIAS  release_5-2 Revision v5.2.25-18-g3f80b82851
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
Concrete element node class.
Definition: Element.php:6
Definition that allows a set of elements, but disallows empty children.
Definition: Required.php:6
$result
$x
Definition: example_009.php:98
Defines allowed child nodes and validates nodes against it.
Definition: ChildDef.php:6
$whitespace
Whether or not the last passed node was all whitespace.
Definition: Required.php:18
Create styles array
The data for the language used.
Concrete text token class.
Definition: Text.php:12
validateChildren($children, $config, $context)
Definition: Required.php:58
$elements
Lookup table of allowed elements.
Definition: Required.php:12