/*

 * Copyright (C) 2006, 2010 Apple 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, Element* 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> increaseSelectionListLevel(Document*, Type);

    static PassRefPtr<IncreaseSelectionListLevelCommand> create(Document* document, Type type)

    {

        return adoptRef(new IncreaseSelectionListLevelCommand(document, type));

    }

    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:

    static PassRefPtr<DecreaseSelectionListLevelCommand> create(Document* document)

    {

        return adoptRef(new DecreaseSelectionListLevelCommand(document));

    }

    DecreaseSelectionListLevelCommand(Document*);

    virtual void doApply();

};

} // namespace WebCore

#endif // ModifySelectionListLevel_h