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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 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
    100