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-rw-r--r--vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php102
1 files changed, 102 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php
new file mode 100644
index 000000000..128132e96
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php
@@ -0,0 +1,102 @@
+<?php
+
+/**
+ * Custom validation class, accepts DTD child definitions
+ *
+ * @warning Currently this class is an all or nothing proposition, that is,
+ * it will only give a bool return value.
+ */
+class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
+{
+ /**
+ * @type string
+ */
+ public $type = 'custom';
+
+ /**
+ * @type bool
+ */
+ public $allow_empty = false;
+
+ /**
+ * Allowed child pattern as defined by the DTD.
+ * @type string
+ */
+ public $dtd_regex;
+
+ /**
+ * PCRE regex derived from $dtd_regex.
+ * @type string
+ */
+ private $_pcre_regex;
+
+ /**
+ * @param $dtd_regex Allowed child pattern from the DTD
+ */
+ public function __construct($dtd_regex)
+ {
+ $this->dtd_regex = $dtd_regex;
+ $this->_compileRegex();
+ }
+
+ /**
+ * Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
+ */
+ protected function _compileRegex()
+ {
+ $raw = str_replace(' ', '', $this->dtd_regex);
+ if ($raw{0} != '(') {
+ $raw = "($raw)";
+ }
+ $el = '[#a-zA-Z0-9_.-]+';
+ $reg = $raw;
+
+ // COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M
+ // DOING! Seriously: if there's problems, please report them.
+
+ // collect all elements into the $elements array
+ preg_match_all("/$el/", $reg, $matches);
+ foreach ($matches[0] as $match) {
+ $this->elements[$match] = true;
+ }
+
+ // setup all elements as parentheticals with leading commas
+ $reg = preg_replace("/$el/", '(,\\0)', $reg);
+
+ // remove commas when they were not solicited
+ $reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg);
+
+ // remove all non-paranthetical commas: they are handled by first regex
+ $reg = preg_replace("/,\(/", '(', $reg);
+
+ $this->_pcre_regex = $reg;
+ }
+
+ /**
+ * @param HTMLPurifier_Node[] $children
+ * @param HTMLPurifier_Config $config
+ * @param HTMLPurifier_Context $context
+ * @return bool
+ */
+ public function validateChildren($children, $config, $context)
+ {
+ $list_of_children = '';
+ $nesting = 0; // depth into the nest
+ foreach ($children as $node) {
+ if (!empty($node->is_whitespace)) {
+ continue;
+ }
+ $list_of_children .= $node->name . ',';
+ }
+ // add leading comma to deal with stray comma declarations
+ $list_of_children = ',' . rtrim($list_of_children, ',');
+ $okay =
+ preg_match(
+ '/^,?' . $this->_pcre_regex . '$/',
+ $list_of_children
+ );
+ return (bool)$okay;
+ }
+}
+
+// vim: et sw=4 sts=4