1/*
2 * Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef ModifySelectionListLevel_h
27#define ModifySelectionListLevel_h
28
29#include "CompositeEditCommand.h"
30
31namespace WebCore {
32
33// ModifySelectionListLevelCommand provides functions useful for both increasing and decreasing the list level.
34// It is the base class of IncreaseSelectionListLevelCommand and DecreaseSelectionListLevelCommand.
35// It is not used on its own.
36class ModifySelectionListLevelCommand : public CompositeEditCommand {
37protected:
38    explicit ModifySelectionListLevelCommand(Document*);
39
40    void appendSiblingNodeRange(Node* startNode, Node* endNode, Element* newParent);
41    void insertSiblingNodeRangeBefore(Node* startNode, Node* endNode, Node* refNode);
42    void insertSiblingNodeRangeAfter(Node* startNode, Node* endNode, Node* refNode);
43
44private:
45    virtual bool preservesTypingStyle() const;
46};
47
48// IncreaseSelectionListLevelCommand moves the selected list items one level deeper.
49class IncreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
50public:
51    static bool canIncreaseSelectionListLevel(Document*);
52    static PassRefPtr<Node> increaseSelectionListLevel(Document*);
53    static PassRefPtr<Node> increaseSelectionListLevelOrdered(Document*);
54    static PassRefPtr<Node> increaseSelectionListLevelUnordered(Document*);
55
56private:
57    enum Type { InheritedListType, OrderedList, UnorderedList };
58    static PassRefPtr<Node> increaseSelectionListLevel(Document*, Type);
59
60    static PassRefPtr<IncreaseSelectionListLevelCommand> create(Document* document, Type type)
61    {
62        return adoptRef(new IncreaseSelectionListLevelCommand(document, type));
63    }
64
65    IncreaseSelectionListLevelCommand(Document*, Type);
66
67    virtual void doApply();
68
69    Type m_listType;
70    RefPtr<Node> m_listElement;
71};
72
73// DecreaseSelectionListLevelCommand moves the selected list items one level shallower.
74class DecreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
75public:
76    static bool canDecreaseSelectionListLevel(Document*);
77    static void decreaseSelectionListLevel(Document*);
78
79private:
80    static PassRefPtr<DecreaseSelectionListLevelCommand> create(Document* document)
81    {
82        return adoptRef(new DecreaseSelectionListLevelCommand(document));
83    }
84
85    explicit DecreaseSelectionListLevelCommand(Document*);
86
87    virtual void doApply();
88};
89
90} // namespace WebCore
91
92#endif // ModifySelectionListLevel_h
93