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+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2014 Samsung Electronics. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef EmptyNodeList_h
+#define EmptyNodeList_h
+
+#include "core/dom/NodeList.h"
+#include "wtf/RefPtr.h"
+
+namespace WebCore {
+
+class EmptyNodeList FINAL : public NodeList {
+public:
+ static PassRefPtrWillBeRawPtr<EmptyNodeList> create(Node& rootNode)
+ {
+ return adoptRefWillBeNoop(new EmptyNodeList(rootNode));
+ }
+ virtual ~EmptyNodeList();
+
+ Node& ownerNode() const { return *m_owner; }
+
+ virtual void trace(Visitor*) OVERRIDE;
+
+private:
+ explicit EmptyNodeList(Node& rootNode) : m_owner(rootNode) { }
+
+ virtual unsigned length() const OVERRIDE { return 0; }
+ virtual Node* item(unsigned) const OVERRIDE { return 0; }
+
+ virtual bool isEmptyNodeList() const OVERRIDE { return true; }
+ virtual Node* virtualOwnerNode() const OVERRIDE;
+
+ RefPtrWillBeMember<Node> m_owner;
+};
+
+DEFINE_TYPE_CASTS(EmptyNodeList, NodeList, nodeList, nodeList->isEmptyNodeList(), nodeList.isEmptyNodeList());
+
+} // namespace WebCore
+
+#endif // EmptyNodeList_h