diff -r 000000000000 -r 4f2f89ce4247 WebCore/dom/NodeIterator.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/dom/NodeIterator.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,82 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef NodeIterator_h
+#define NodeIterator_h
+
+#include "NodeFilter.h"
+#include "Traversal.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+    typedef int ExceptionCode;
+
+    class NodeIterator : public RefCounted<NodeIterator>, public Traversal {
+    public:
+        static PassRefPtr<NodeIterator> create(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter, bool expandEntityReferences)
+        {
+            return adoptRef(new NodeIterator(rootNode, whatToShow, filter, expandEntityReferences));
+        }
+        ~NodeIterator();
+
+        PassRefPtr<Node> nextNode(ScriptState*, ExceptionCode&);
+        PassRefPtr<Node> previousNode(ScriptState*, ExceptionCode&);
+        void detach();
+
+        Node* referenceNode() const { return m_referenceNode.node.get(); }
+        bool pointerBeforeReferenceNode() const { return m_referenceNode.isPointerBeforeNode; }
+
+        // This function is called before any node is removed from the document tree.
+        void nodeWillBeRemoved(Node*);
+
+        // Do not call these functions. They are just scaffolding to support the Objective-C bindings.
+        // They operate in the main thread normal world, and they swallow JS exceptions.
+        PassRefPtr<Node> nextNode(ExceptionCode& ec) { return nextNode(scriptStateFromNode(mainThreadNormalWorld(), referenceNode()), ec); }
+        PassRefPtr<Node> previousNode(ExceptionCode& ec) { return previousNode(scriptStateFromNode(mainThreadNormalWorld(), referenceNode()), ec); }
+
+    private:
+        NodeIterator(PassRefPtr<Node>, unsigned whatToShow, PassRefPtr<NodeFilter>, bool expandEntityReferences);
+
+        struct NodePointer {
+            RefPtr<Node> node;
+            bool isPointerBeforeNode;
+            NodePointer();
+            NodePointer(PassRefPtr<Node>, bool);
+            void clear();
+            bool moveToNext(Node* root);
+            bool moveToPrevious(Node* root);
+        };
+
+        void updateForNodeRemoval(Node* nodeToBeRemoved, NodePointer&) const;
+
+        NodePointer m_referenceNode;
+        NodePointer m_candidateNode;
+        bool m_detached;
+    };
+
+} // namespace WebCore
+
+#endif // NodeIterator_h