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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 
     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:
     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