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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 
31 namespace 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.
36 class ModifySelectionListLevelCommand : public CompositeEditCommand {
37 protected:
38     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 
44 private:
45     virtual bool preservesTypingStyle() const;
46 };
47 
48 // IncreaseSelectionListLevelCommand moves the selected list items one level deeper.
49 class IncreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
50 public:
51     static bool canIncreaseSelectionListLevel(Document*);
52     static PassRefPtr<Node> increaseSelectionListLevel(Document*);
53     static PassRefPtr<Node> increaseSelectionListLevelOrdered(Document*);
54     static PassRefPtr<Node> increaseSelectionListLevelUnordered(Document*);
55 
56 private:
57     enum Type { InheritedListType, OrderedList, UnorderedList };
58     static PassRefPtr<Node> increaseSelectionListLevel(Document*, Type);
59 
create(Document * document,Type type)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.
74 class DecreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
75 public:
76     static bool canDecreaseSelectionListLevel(Document*);
77     static void decreaseSelectionListLevel(Document*);
78 
79 private:
create(Document * document)80     static PassRefPtr<DecreaseSelectionListLevelCommand> create(Document* document)
81     {
82         return adoptRef(new DecreaseSelectionListLevelCommand(document));
83     }
84 
85     DecreaseSelectionListLevelCommand(Document*);
86 
87     virtual void doApply();
88 };
89 
90 } // namespace WebCore
91 
92 #endif // ModifySelectionListLevel_h
93