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      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 EditingStyle;
     34 
     35 class DeleteSelectionCommand : public CompositeEditCommand {
     36 public:
     37     static PassRefPtr<DeleteSelectionCommand> create(Document* document, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool replace = false, bool expandForSpecialElements = false)
     38     {
     39         return adoptRef(new DeleteSelectionCommand(document, smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements));
     40     }
     41     static PassRefPtr<DeleteSelectionCommand> create(const VisibleSelection& selection, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool replace = false, bool expandForSpecialElements = false)
     42     {
     43         return adoptRef(new DeleteSelectionCommand(selection, smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements));
     44     }
     45 
     46 private:
     47     DeleteSelectionCommand(Document*, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements);
     48     DeleteSelectionCommand(const VisibleSelection&, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements);
     49 
     50     virtual void doApply();
     51     virtual EditAction editingAction() const;
     52 
     53     virtual bool preservesTypingStyle() const;
     54 
     55     void initializeStartEnd(Position&, Position&);
     56     void setStartingSelectionOnSmartDelete(const Position&, const Position&);
     57     void initializePositionData();
     58     void saveTypingStyleState();
     59     void insertPlaceholderForAncestorBlockContent();
     60     bool handleSpecialCaseBRDelete();
     61     void handleGeneralDelete();
     62     void fixupWhitespace();
     63     void mergeParagraphs();
     64     void removePreviouslySelectedEmptyTableRows();
     65     void calculateEndingPosition();
     66     void calculateTypingStyleAfterDelete();
     67     void clearTransientState();
     68     virtual void removeNode(PassRefPtr<Node>);
     69     virtual void deleteTextFromNode(PassRefPtr<Text>, unsigned, unsigned);
     70 
     71     bool m_hasSelectionToDelete;
     72     bool m_smartDelete;
     73     bool m_mergeBlocksAfterDelete;
     74     bool m_needPlaceholder;
     75     bool m_replace;
     76     bool m_expandForSpecialElements;
     77     bool m_pruneStartBlockIfNecessary;
     78     bool m_startsAtEmptyLine;
     79 
     80     // This data is transient and should be cleared at the end of the doApply function.
     81     VisibleSelection m_selectionToDelete;
     82     Position m_upstreamStart;
     83     Position m_downstreamStart;
     84     Position m_upstreamEnd;
     85     Position m_downstreamEnd;
     86     Position m_endingPosition;
     87     Position m_leadingWhitespace;
     88     Position m_trailingWhitespace;
     89     RefPtr<Node> m_startBlock;
     90     RefPtr<Node> m_endBlock;
     91     RefPtr<EditingStyle> m_typingStyle;
     92     RefPtr<EditingStyle> m_deleteIntoBlockquoteStyle;
     93     RefPtr<Node> m_startRoot;
     94     RefPtr<Node> m_endRoot;
     95     RefPtr<Node> m_startTableRow;
     96     RefPtr<Node> m_endTableRow;
     97     RefPtr<Node> m_temporaryPlaceholder;
     98 };
     99 
    100 } // namespace WebCore
    101 
    102 #endif // DeleteSelectionCommand_h
    103