From 74130df40d9156eb4ef71b0af1ba9be797fafeec Mon Sep 17 00:00:00 2001
From: Yorick Peterse <yorickpeterse@gmail.com>
Date: Wed, 9 Jul 2014 09:28:00 +0200
Subject: [PATCH] XPath evaluation support for absolute paths.

---
 lib/oga/xpath/evaluator.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/oga/xpath/evaluator.rb b/lib/oga/xpath/evaluator.rb
index 1c5b190..e110788 100644
--- a/lib/oga/xpath/evaluator.rb
+++ b/lib/oga/xpath/evaluator.rb
@@ -39,6 +39,20 @@ module Oga
         end
       end
 
+      def process_all(nodes)
+        nodes.each do |node|
+          process(node)
+        end
+      end
+
+      def on_absolute(node)
+        if @document.respond_to?(:root_node)
+          @context = XML::NodeSet.new([@document.root_node])
+        end
+
+        process_all(node.children)
+      end
+
       def on_path(node)
         test, children = *node