text: /*
   * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
   */
  
  #ifndef DeleteSelectionCommand_h
  #define DeleteSelectionCommand_h
  
  #include "CompositeEditCommand.h"
  
  namespace WebCore {
  
  class EditingStyle;
  
  class DeleteSelectionCommand : public CompositeEditCommand { 
  public:
      static PassRefPtr<DeleteSelectionCommand> create(Document* document, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool replace = false, bool expandForSpecialElements = false)
      {
          return adoptRef(new DeleteSelectionCommand(document, smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements));
      }
      static PassRefPtr<DeleteSelectionCommand> create(const VisibleSelection& selection, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool replace = false, bool expandForSpecialElements = false)
      {
          return adoptRef(new DeleteSelectionCommand(selection, smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements));
      }
  
  private:
      DeleteSelectionCommand(Document*, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements);
      DeleteSelectionCommand(const VisibleSelection&, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements);
  
      virtual void doApply();
      virtual EditAction editingAction() const;
      
      virtual bool preservesTypingStyle() const;
  
      void initializeStartEnd(Position&, Position&);
      void setStartingSelectionOnSmartDelete(const Position&, const Position&);
      void initializePositionData();
      void saveTypingStyleState();
      void insertPlaceholderForAncestorBlockContent();
      bool handleSpecialCaseBRDelete();
      void handleGeneralDelete();
      void fixupWhitespace();
      void mergeParagraphs();
      void removePreviouslySelectedEmptyTableRows();
      void calculateEndingPosition();
      void calculateTypingStyleAfterDelete();
      void clearTransientState();
      virtual void removeNode(PassRefPtr<Node>);
      virtual void deleteTextFromNode(PassRefPtr<Text>, unsigned, unsigned);
      void removeRedundantBlocks();
  
      // This function provides access to original string after the correction has been deleted.
      String originalStringForAutocorrectionAtBeginningOfSelection();
  
      bool m_hasSelectionToDelete;
      bool m_smartDelete;
      bool m_mergeBlocksAfterDelete;
      bool m_needPlaceholder;
      bool m_replace;
      bool m_expandForSpecialElements;
      bool m_pruneStartBlockIfNecessary;
      bool m_startsAtEmptyLine;
  
      // This data is transient and should be cleared at the end of the doApply function.
      VisibleSelection m_selectionToDelete;
      Position m_upstreamStart;
      Position m_downstreamStart;
      Position m_upstreamEnd;
      Position m_downstreamEnd;
      Position m_endingPosition;
      Position m_leadingWhitespace;
      Position m_trailingWhitespace;
      RefPtr<Node> m_startBlock;
      RefPtr<Node> m_endBlock;
      RefPtr<EditingStyle> m_typingStyle;
      RefPtr<EditingStyle> m_deleteIntoBlockquoteStyle;
      RefPtr<Node> m_startRoot;
      RefPtr<Node> m_endRoot;
      RefPtr<Node> m_startTableRow;
      RefPtr<Node> m_endTableRow;
      RefPtr<Node> m_temporaryPlaceholder;
  };
  
  } // namespace WebCore
  
  #endif // DeleteSelectionCommand_h
  