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-rw-r--r--library/HTMLPurifier/AttrDef/HTML/Class.php34
1 files changed, 34 insertions, 0 deletions
diff --git a/library/HTMLPurifier/AttrDef/HTML/Class.php b/library/HTMLPurifier/AttrDef/HTML/Class.php
new file mode 100644
index 000000000..370068d97
--- /dev/null
+++ b/library/HTMLPurifier/AttrDef/HTML/Class.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * Implements special behavior for class attribute (normally NMTOKENS)
+ */
+class HTMLPurifier_AttrDef_HTML_Class extends HTMLPurifier_AttrDef_HTML_Nmtokens
+{
+ protected function split($string, $config, $context) {
+ // really, this twiddle should be lazy loaded
+ $name = $config->getDefinition('HTML')->doctype->name;
+ if ($name == "XHTML 1.1" || $name == "XHTML 2.0") {
+ return parent::split($string, $config, $context);
+ } else {
+ return preg_split('/\s+/', $string);
+ }
+ }
+ protected function filter($tokens, $config, $context) {
+ $allowed = $config->get('Attr.AllowedClasses');
+ $forbidden = $config->get('Attr.ForbiddenClasses');
+ $ret = array();
+ foreach ($tokens as $token) {
+ if (
+ ($allowed === null || isset($allowed[$token])) &&
+ !isset($forbidden[$token]) &&
+ // We need this O(n) check because of PHP's array
+ // implementation that casts -0 to 0.
+ !in_array($token, $ret, true)
+ ) {
+ $ret[] = $token;
+ }
+ }
+ return $ret;
+ }
+}