WebCore/editing/DeleteSelectionCommand.h

   1 /*
   2  * Copyright (C) 2005, 2006, 2008 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 DeleteSelectionCommand_h
  27 #define DeleteSelectionCommand_h
  28
  29 #include "CompositeEditCommand.h"
  30
  31 namespace WebCore {
  32
  33 class DeleteSelectionCommand : public CompositeEditCommand {
  34 public:
  35     static PassRefPtr<DeleteSelectionCommand> create(Document* document, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool replace = false, bool expandForSpecialElements = false)
  36     {
  37         return adoptRef(new DeleteSelectionCommand(document, smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements));
  38     }
  39     static PassRefPtr<DeleteSelectionCommand> create(const VisibleSelection& selection, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool replace = false, bool expandForSpecialElements = false)
  40     {
  41         return adoptRef(new DeleteSelectionCommand(selection, smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements));
  42     }
  43
  44 private:
  45     DeleteSelectionCommand(Document*, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements);
  46     DeleteSelectionCommand(const VisibleSelection&, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements);
  47
  48     virtual void doApply();
  49     virtual EditAction editingAction() const;
  50
  51     virtual bool preservesTypingStyle() const;
  52
  53     void initializeStartEnd(Position&, Position&);
  54     void initializePositionData();
  55     void saveTypingStyleState();
  56     void insertPlaceholderForAncestorBlockContent();
  57     bool handleSpecialCaseBRDelete();
  58     void handleGeneralDelete();
  59     void fixupWhitespace();
  60     void mergeParagraphs();
  61     void removePreviouslySelectedEmptyTableRows();
  62     void calculateEndingPosition();
  63     void calculateTypingStyleAfterDelete();
  64     void clearTransientState();
  65     virtual void removeNode(PassRefPtr<Node>);
  66     virtual void deleteTextFromNode(PassRefPtr<Text>, unsigned, unsigned);
  67
  68     bool m_hasSelectionToDelete;
  69     bool m_smartDelete;
  70     bool m_mergeBlocksAfterDelete;
  71     bool m_needPlaceholder;
  72     bool m_replace;
  73     bool m_expandForSpecialElements;
  74     bool m_pruneStartBlockIfNecessary;
  75     bool m_startsAtEmptyLine;
  76
  77     // This data is transient and should be cleared at the end of the doApply function.
  78     VisibleSelection m_selectionToDelete;
  79     Position m_upstreamStart;
  80     Position m_downstreamStart;
  81     Position m_upstreamEnd;
  82     Position m_downstreamEnd;
  83     Position m_endingPosition;
  84     Position m_leadingWhitespace;
  85     Position m_trailingWhitespace;
  86     RefPtr<Node> m_startBlock;
  87     RefPtr<Node> m_endBlock;
  88     RefPtr<CSSMutableStyleDeclaration> m_typingStyle;
  89     RefPtr<CSSMutableStyleDeclaration> m_deleteIntoBlockquoteStyle;
  90     RefPtr<Node> m_startRoot;
  91     RefPtr<Node> m_endRoot;
  92     RefPtr<Node> m_startTableRow;
  93     RefPtr<Node> m_endTableRow;
  94     RefPtr<Node> m_temporaryPlaceholder;
  95 };
  96
  97 } // namespace WebCore
  98
  99 #endif // DeleteSelectionCommand_h