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-rw-r--r--lib/htmlpurifier/library/HTMLPurifier/AttrTransform/Lang.php28
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/htmlpurifier/library/HTMLPurifier/AttrTransform/Lang.php b/lib/htmlpurifier/library/HTMLPurifier/AttrTransform/Lang.php
new file mode 100644
index 000000000..5869e7f82
--- /dev/null
+++ b/lib/htmlpurifier/library/HTMLPurifier/AttrTransform/Lang.php
@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * Post-transform that copies lang's value to xml:lang (and vice-versa)
+ * @note Theoretically speaking, this could be a pre-transform, but putting
+ * post is more efficient.
+ */
+class HTMLPurifier_AttrTransform_Lang extends HTMLPurifier_AttrTransform
+{
+
+ public function transform($attr, $config, $context) {
+
+ $lang = isset($attr['lang']) ? $attr['lang'] : false;
+ $xml_lang = isset($attr['xml:lang']) ? $attr['xml:lang'] : false;
+
+ if ($lang !== false && $xml_lang === false) {
+ $attr['xml:lang'] = $lang;
+ } elseif ($xml_lang !== false) {
+ $attr['lang'] = $xml_lang;
+ }
+
+ return $attr;
+
+ }
+
+}
+
+// vim: et sw=4 sts=4