--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/dom/Traversal.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
+ * Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
+ * Copyright (C) 2004, 2008 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "Traversal.h"
+
+#include "Node.h"
+#include "NodeFilter.h"
+
+namespace WebCore {
+
+Traversal::Traversal(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> nodeFilter, bool expandEntityReferences)
+    : m_root(rootNode)
+    , m_whatToShow(whatToShow)
+    , m_filter(nodeFilter)
+    , m_expandEntityReferences(expandEntityReferences)
+{
+}
+
+short Traversal::acceptNode(ScriptState* state, Node* node) const
+{
+    // FIXME: To handle XML properly we would have to check m_expandEntityReferences.
+
+    // The bit twiddling here is done to map DOM node types, which are given as integers from
+    // 1 through 12, to whatToShow bit masks.
+    if (!(((1 << (node->nodeType() - 1)) & m_whatToShow)))
+        return NodeFilter::FILTER_SKIP;
+    if (!m_filter)
+        return NodeFilter::FILTER_ACCEPT;
+    return m_filter->acceptNode(state, node);
+}
+
+} // namespace WebCore