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-rw-r--r--library/HTMLPurifier/AttrDef/Switch.php34
1 files changed, 34 insertions, 0 deletions
diff --git a/library/HTMLPurifier/AttrDef/Switch.php b/library/HTMLPurifier/AttrDef/Switch.php
new file mode 100644
index 000000000..c9e3ed193
--- /dev/null
+++ b/library/HTMLPurifier/AttrDef/Switch.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * Decorator that, depending on a token, switches between two definitions.
+ */
+class HTMLPurifier_AttrDef_Switch
+{
+
+ protected $tag;
+ protected $withTag, $withoutTag;
+
+ /**
+ * @param string $tag Tag name to switch upon
+ * @param HTMLPurifier_AttrDef $with_tag Call if token matches tag
+ * @param HTMLPurifier_AttrDef $without_tag Call if token doesn't match, or there is no token
+ */
+ public function __construct($tag, $with_tag, $without_tag) {
+ $this->tag = $tag;
+ $this->withTag = $with_tag;
+ $this->withoutTag = $without_tag;
+ }
+
+ public function validate($string, $config, $context) {
+ $token = $context->get('CurrentToken', true);
+ if (!$token || $token->name !== $this->tag) {
+ return $this->withoutTag->validate($string, $config, $context);
+ } else {
+ return $this->withTag->validate($string, $config, $context);
+ }
+ }
+
+}
+
+// vim: et sw=4 sts=4