adding xml document fragment

Manifest.txt

@@ -17,6 +17,8 @@ ext/nokogiri/xml_comment.c
 ext/nokogiri/xml_comment.h
 ext/nokogiri/xml_document.c
 ext/nokogiri/xml_document.h
+ext/nokogiri/xml_document_fragment.c
+ext/nokogiri/xml_document_fragment.h
 ext/nokogiri/xml_dtd.c
 ext/nokogiri/xml_dtd.h
 ext/nokogiri/xml_io.c
@@ -133,6 +135,7 @@ test/xml/test_builder.rb
 test/xml/test_cdata.rb
 test/xml/test_comment.rb
 test/xml/test_document.rb
+test/xml/test_document_fragment.rb
 test/xml/test_dtd.rb
 test/xml/test_node.rb
 test/xml/test_node_set.rb

ext/nokogiri/native.c

@@ -26,6 +26,7 @@ void Init_native()
   init_xml_document();
   init_html_document();
   init_xml_node();
+  init_xml_document_fragment();
   init_xml_text();
   init_xml_cdata();
   init_xml_comment();

ext/nokogiri/native.h

@@ -17,6 +17,7 @@
 #include <xml_node.h>
 #include <xml_text.h>
 #include <xml_cdata.h>
+#include <xml_document_fragment.h>
 #include <xml_comment.h>
 #include <xml_node_set.h>
 #include <xml_xpath.h>

ext/nokogiri/xml_document_fragment.c

@@ -0,0 +1,38 @@
+#include <xml_document_fragment.h>
+
+/*
+ * call-seq:
+ *  new(document)
+ *
+ * Create a new DocumentFragment element on the +document+
+ */
+static VALUE new(VALUE klass, VALUE doc)
+{
+  xmlDocPtr xml_doc;
+  Data_Get_Struct(doc, xmlDoc, xml_doc);
+
+  xmlNodePtr node = xmlNewDocFragment(xml_doc);
+
+  VALUE rb_node = Nokogiri_wrap_xml_node(node);
+
+  if(rb_block_given_p()) rb_yield(rb_node);
+
+  return rb_node;
+}
+
+VALUE cNokogiriXmlDocumentFragment;
+void init_xml_document_fragment()
+{
+  VALUE nokogiri = rb_define_module("Nokogiri");
+  VALUE xml = rb_define_module_under(nokogiri, "XML");
+  VALUE node = rb_define_class_under(xml, "Node", rb_cObject);
+
+  /*
+   * DocumentFragment represents a DocumentFragment node in an xml document.
+   */
+  VALUE klass = rb_define_class_under(xml, "DocumentFragment", node);
+
+  cNokogiriXmlDocumentFragment = klass;
+
+  rb_define_singleton_method(klass, "new", new, 1);
+}

ext/nokogiri/xml_document_fragment.h

@@ -0,0 +1,10 @@
+#ifndef NOKOGIRI_XML_DOCUMENT_FRAGMENT
+#define NOKOGIRI_XML_DOCUMENT_FRAGMENT
+
+#include <native.h>
+
+void init_xml_document_fragment();
+
+extern VALUE cNokogiriXmlDocumentFragment;
+#endif
+

test/xml/test_document_fragment.rb

@@ -0,0 +1,12 @@
+require File.expand_path(File.join(File.dirname(__FILE__), '..', "helper"))
+
+module Nokogiri
+  module XML
+    class TestDocumentFragment < Nokogiri::TestCase
+      def test_new
+        @xml = Nokogiri::XML.parse(File.read(XML_FILE), XML_FILE)
+        fragment = Nokogiri::XML::DocumentFragment.new(@xml)
+      end
+    end
+  end
+end