1 files changed, 43 insertions, 0 deletions
diff --git a/extensions/adblock/keys.vala b/extensions/adblock/keys.vala
new file mode 100644
index 00000000..d25eb788
--- /dev/null
+++ b/extensions/adblock/keys.vala
@@ -0,0 +1,43 @@
+/*
+ Copyright (C) 2009-2014 Christian Dywan <christian@twotoasts.de>
+ Copyright (C) 2009-2012 Alexander Butenko <a.butenka@gmail.com>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ See the file COPYING for the full license text.
+*/
+
+namespace Adblock {
+    public class Keys : Filter {
+        List<Regex> blacklist;
+
+        public Keys (Options options) {
+            base (options);
+            blacklist = new List<Regex> ();
+        }
+
+        public override Directive? match (string request_uri, string page_uri) throws Error {
+            string? uri = fixup_regex ("", request_uri);
+            if (uri == null)
+                return null;
+
+            int signature_size = 8;
+            int pos, l = uri.length;
+            for (pos = l - signature_size; pos >= 0; pos--) {
+                string signature = uri.offset (pos).ndup (signature_size);
+                var regex = rules.lookup (signature);
+                if (regex == null || blacklist.find (regex) != null)
+                    continue;
+
+                if (check_rule (regex, uri, request_uri, page_uri))
+                    return Directive.BLOCK;
+                blacklist.prepend (regex);
+            }
+
+            return null;
+        }
+    }
+}