WebCore/ModifySelectionListLevel.h

   1 /*
   2  * Copyright (C) 2006 Apple Computer, 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> increaseSelectionListLevelWithType(Document*, Type listType);
  59
  60     IncreaseSelectionListLevelCommand(Document*, Type);
  61     virtual void doApply();
  62
  63     Type m_listType;
  64     RefPtr<Node> m_listElement;
  65 };
  66
  67 // DecreaseSelectionListLevelCommand moves the selected list items one level shallower.
  68 class DecreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
  69 public:
  70     static bool canDecreaseSelectionListLevel(Document*);
  71     static void decreaseSelectionListLevel(Document*);
  72
  73 private:
  74     DecreaseSelectionListLevelCommand(Document*);
  75     virtual void doApply();
  76 };
  77
  78 } // namespace WebCore
  79
  80 #endif // ModifySelectionListLevel_h