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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 "core/editing/CompositeEditCommand.h"
     30 
     31 namespace blink {
     32 
     33 class EditingStyle;
     34 class HTMLTableRowElement;
     35 
     36 class DeleteSelectionCommand FINAL : public CompositeEditCommand {
     37 public:
     38     static PassRefPtrWillBeRawPtr<DeleteSelectionCommand> create(Document& document, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool expandForSpecialElements = false, bool sanitizeMarkup = true)
     39     {
     40         return adoptRefWillBeNoop(new DeleteSelectionCommand(document, smartDelete, mergeBlocksAfterDelete, expandForSpecialElements, sanitizeMarkup));
     41     }
     42     static PassRefPtrWillBeRawPtr<DeleteSelectionCommand> create(const VisibleSelection& selection, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool expandForSpecialElements = false, bool sanitizeMarkup = true)
     43     {
     44         return adoptRefWillBeNoop(new DeleteSelectionCommand(selection, smartDelete, mergeBlocksAfterDelete, expandForSpecialElements, sanitizeMarkup));
     45     }
     46 
     47     virtual void trace(Visitor*) OVERRIDE;
     48 
     49 private:
     50     DeleteSelectionCommand(Document&, bool smartDelete, bool mergeBlocksAfterDelete, bool expandForSpecialElements, bool santizeMarkup);
     51     DeleteSelectionCommand(const VisibleSelection&, bool smartDelete, bool mergeBlocksAfterDelete, bool expandForSpecialElements, bool sanitizeMarkup);
     52 
     53     virtual void doApply() OVERRIDE;
     54     virtual EditAction editingAction() const OVERRIDE;
     55 
     56     virtual bool preservesTypingStyle() const OVERRIDE;
     57 
     58     void initializeStartEnd(Position&, Position&);
     59     void setStartingSelectionOnSmartDelete(const Position&, const Position&);
     60     void initializePositionData();
     61     void saveTypingStyleState();
     62     bool handleSpecialCaseBRDelete();
     63     void handleGeneralDelete();
     64     void fixupWhitespace();
     65     void mergeParagraphs();
     66     void removePreviouslySelectedEmptyTableRows();
     67     void calculateTypingStyleAfterDelete();
     68     void clearTransientState();
     69     void makeStylingElementsDirectChildrenOfEditableRootToPreventStyleLoss();
     70     virtual void removeNode(PassRefPtrWillBeRawPtr<Node>, ShouldAssumeContentIsAlwaysEditable = DoNotAssumeContentIsAlwaysEditable) OVERRIDE;
     71     virtual void deleteTextFromNode(PassRefPtrWillBeRawPtr<Text>, unsigned, unsigned) OVERRIDE;
     72     void removeRedundantBlocks();
     73 
     74     bool m_hasSelectionToDelete;
     75     bool m_smartDelete;
     76     bool m_mergeBlocksAfterDelete;
     77     bool m_needPlaceholder;
     78     bool m_expandForSpecialElements;
     79     bool m_pruneStartBlockIfNecessary;
     80     bool m_startsAtEmptyLine;
     81     bool m_sanitizeMarkup;
     82 
     83     // This data is transient and should be cleared at the end of the doApply function.
     84     VisibleSelection m_selectionToDelete;
     85     Position m_upstreamStart;
     86     Position m_downstreamStart;
     87     Position m_upstreamEnd;
     88     Position m_downstreamEnd;
     89     Position m_endingPosition;
     90     Position m_leadingWhitespace;
     91     Position m_trailingWhitespace;
     92     RefPtrWillBeMember<Node> m_startBlock;
     93     RefPtrWillBeMember<Node> m_endBlock;
     94     RefPtrWillBeMember<EditingStyle> m_typingStyle;
     95     RefPtrWillBeMember<EditingStyle> m_deleteIntoBlockquoteStyle;
     96     RefPtrWillBeMember<Element> m_startRoot;
     97     RefPtrWillBeMember<Element> m_endRoot;
     98     RefPtrWillBeMember<HTMLTableRowElement> m_startTableRow;
     99     RefPtrWillBeMember<HTMLTableRowElement> m_endTableRow;
    100     RefPtrWillBeMember<Node> m_temporaryPlaceholder;
    101 };
    102 
    103 } // namespace blink
    104 
    105 #endif // DeleteSelectionCommand_h
    106