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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 InsertTextCommand_h
     27 #define InsertTextCommand_h
     28 
     29 #include "core/editing/CompositeEditCommand.h"
     30 
     31 namespace WebCore {
     32 
     33 class DocumentMarkerController;
     34 class Text;
     35 
     36 class TextInsertionMarkerSupplier : public RefCounted<TextInsertionMarkerSupplier> {
     37 public:
     38     virtual ~TextInsertionMarkerSupplier() { }
     39     virtual void addMarkersToTextNode(Text*, unsigned offsetOfInsertion, const String& textInserted) = 0;
     40 protected:
     41     TextInsertionMarkerSupplier() { }
     42 };
     43 
     44 class InsertTextCommand : public CompositeEditCommand {
     45 public:
     46     enum RebalanceType {
     47         RebalanceLeadingAndTrailingWhitespaces,
     48         RebalanceAllWhitespaces
     49     };
     50 
     51     static PassRefPtr<InsertTextCommand> create(Document* document, const String& text, bool selectInsertedText = false,
     52         RebalanceType rebalanceType = RebalanceLeadingAndTrailingWhitespaces)
     53     {
     54         return adoptRef(new InsertTextCommand(document, text, selectInsertedText, rebalanceType));
     55     }
     56 
     57     static PassRefPtr<InsertTextCommand> createWithMarkerSupplier(Document* document, const String& text, PassRefPtr<TextInsertionMarkerSupplier> markerSupplier)
     58     {
     59         return adoptRef(new InsertTextCommand(document, text, markerSupplier));
     60     }
     61 
     62 private:
     63 
     64     InsertTextCommand(Document*, const String& text, bool selectInsertedText, RebalanceType);
     65     InsertTextCommand(Document*, const String& text, PassRefPtr<TextInsertionMarkerSupplier>);
     66 
     67     void deleteCharacter();
     68 
     69     virtual void doApply();
     70 
     71     Position positionInsideTextNode(const Position&);
     72     Position insertTab(const Position&);
     73 
     74     bool performTrivialReplace(const String&, bool selectInsertedText);
     75     bool performOverwrite(const String&, bool selectInsertedText);
     76     void setEndingSelectionWithoutValidation(const Position& startPosition, const Position& endPosition);
     77 
     78     friend class TypingCommand;
     79 
     80     String m_text;
     81     bool m_selectInsertedText;
     82     RebalanceType m_rebalanceType;
     83     RefPtr<TextInsertionMarkerSupplier> m_markerSupplier;
     84 };
     85 
     86 } // namespace WebCore
     87 
     88 #endif // InsertTextCommand_h
     89