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-rw-r--r--vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Required.php118
1 files changed, 118 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Required.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Required.php
new file mode 100644
index 000000000..0d1c8f5f3
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Required.php
@@ -0,0 +1,118 @@
+<?php
+
+/**
+ * Definition that allows a set of elements, but disallows empty children.
+ */
+class HTMLPurifier_ChildDef_Required extends HTMLPurifier_ChildDef
+{
+ /**
+ * Lookup table of allowed elements.
+ * @type array
+ */
+ public $elements = array();
+
+ /**
+ * Whether or not the last passed node was all whitespace.
+ * @type bool
+ */
+ protected $whitespace = false;
+
+ /**
+ * @param array|string $elements List of allowed element names (lowercase).
+ */
+ public function __construct($elements)
+ {
+ if (is_string($elements)) {
+ $elements = str_replace(' ', '', $elements);
+ $elements = explode('|', $elements);
+ }
+ $keys = array_keys($elements);
+ if ($keys == array_keys($keys)) {
+ $elements = array_flip($elements);
+ foreach ($elements as $i => $x) {
+ $elements[$i] = true;
+ if (empty($i)) {
+ unset($elements[$i]);
+ } // remove blank
+ }
+ }
+ $this->elements = $elements;
+ }
+
+ /**
+ * @type bool
+ */
+ public $allow_empty = false;
+
+ /**
+ * @type string
+ */
+ public $type = 'required';
+
+ /**
+ * @param array $children
+ * @param HTMLPurifier_Config $config
+ * @param HTMLPurifier_Context $context
+ * @return array
+ */
+ public function validateChildren($children, $config, $context)
+ {
+ // Flag for subclasses
+ $this->whitespace = false;
+
+ // if there are no tokens, delete parent node
+ if (empty($children)) {
+ return false;
+ }
+
+ // the new set of children
+ $result = array();
+
+ // whether or not parsed character data is allowed
+ // this controls whether or not we silently drop a tag
+ // or generate escaped HTML from it
+ $pcdata_allowed = isset($this->elements['#PCDATA']);
+
+ // a little sanity check to make sure it's not ALL whitespace
+ $all_whitespace = true;
+
+ $stack = array_reverse($children);
+ while (!empty($stack)) {
+ $node = array_pop($stack);
+ if (!empty($node->is_whitespace)) {
+ $result[] = $node;
+ continue;
+ }
+ $all_whitespace = false; // phew, we're not talking about whitespace
+
+ if (!isset($this->elements[$node->name])) {
+ // special case text
+ // XXX One of these ought to be redundant or something
+ if ($pcdata_allowed && $node instanceof HTMLPurifier_Node_Text) {
+ $result[] = $node;
+ continue;
+ }
+ // spill the child contents in
+ // ToDo: Make configurable
+ if ($node instanceof HTMLPurifier_Node_Element) {
+ for ($i = count($node->children) - 1; $i >= 0; $i--) {
+ $stack[] = $node->children[$i];
+ }
+ continue;
+ }
+ continue;
+ }
+ $result[] = $node;
+ }
+ if (empty($result)) {
+ return false;
+ }
+ if ($all_whitespace) {
+ $this->whitespace = true;
+ return false;
+ }
+ return $result;
+ }
+}
+
+// vim: et sw=4 sts=4