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diff --git a/WebCore/editing/ModifySelectionListLevel.h b/WebCore/editing/ModifySelectionListLevel.h
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+++ b/WebCore/editing/ModifySelectionListLevel.h
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+/*
+ * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 ModifySelectionListLevel_h
+#define ModifySelectionListLevel_h
+
+#include "CompositeEditCommand.h"
+
+namespace WebCore {
+
+// ModifySelectionListLevelCommand provides functions useful for both increasing and decreasing the list level.
+// It is the base class of IncreaseSelectionListLevelCommand and DecreaseSelectionListLevelCommand.
+// It is not used on its own.
+class ModifySelectionListLevelCommand : public CompositeEditCommand {
+protected:
+    ModifySelectionListLevelCommand(Document*);
+    
+    void appendSiblingNodeRange(Node* startNode, Node* endNode, Node* newParent);
+    void insertSiblingNodeRangeBefore(Node* startNode, Node* endNode, Node* refNode);
+    void insertSiblingNodeRangeAfter(Node* startNode, Node* endNode, Node* refNode);
+
+private:
+    virtual bool preservesTypingStyle() const;    
+};
+
+// IncreaseSelectionListLevelCommand moves the selected list items one level deeper.
+class IncreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
+public:
+    static bool canIncreaseSelectionListLevel(Document*);
+    static PassRefPtr<Node> increaseSelectionListLevel(Document*);
+    static PassRefPtr<Node> increaseSelectionListLevelOrdered(Document*);
+    static PassRefPtr<Node> increaseSelectionListLevelUnordered(Document*);
+
+private:
+    enum Type { InheritedListType, OrderedList, UnorderedList };
+    static PassRefPtr<Node> increaseSelectionListLevelWithType(Document*, Type listType);
+
+    IncreaseSelectionListLevelCommand(Document*, Type);
+    virtual void doApply();
+
+    Type m_listType;
+    RefPtr<Node> m_listElement;
+};
+
+// DecreaseSelectionListLevelCommand moves the selected list items one level shallower.
+class DecreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
+public:
+    static bool canDecreaseSelectionListLevel(Document*);
+    static void decreaseSelectionListLevel(Document*);
+
+private:
+    DecreaseSelectionListLevelCommand(Document*);
+    virtual void doApply();
+};
+
+} // namespace WebCore
+
+#endif // ModifySelectionListLevel_h