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      1 /*
      2  * Copyright (C) 2012 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 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 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 TextInsertionBaseCommand_h
     27 #define TextInsertionBaseCommand_h
     28 
     29 #include "core/editing/CompositeEditCommand.h"
     30 #include "wtf/text/WTFString.h"
     31 
     32 namespace blink {
     33 
     34 class Document;
     35 class VisibleSelection;
     36 
     37 class TextInsertionBaseCommand : public CompositeEditCommand {
     38 public:
     39     virtual ~TextInsertionBaseCommand() { };
     40 
     41 protected:
     42     explicit TextInsertionBaseCommand(Document&);
     43     static void applyTextInsertionCommand(LocalFrame*, PassRefPtrWillBeRawPtr<TextInsertionBaseCommand>, const VisibleSelection& selectionForInsertion, const VisibleSelection& endingSelection);
     44 };
     45 
     46 String dispatchBeforeTextInsertedEvent(const String& text, const VisibleSelection& selectionForInsertion, bool insertionIsForUpdatingComposition);
     47 bool canAppendNewLineFeedToSelection(const VisibleSelection&);
     48 
     49 // LineOperation should define member function "opeartor (size_t lineOffset, size_t lineLength, bool isLastLine)".
     50 // lienLength doesn't include the newline character. So the value of lineLength could be 0.
     51 template <class LineOperation>
     52 void forEachLineInString(const String& string, const LineOperation& operation)
     53 {
     54     unsigned offset = 0;
     55     size_t newline;
     56     while ((newline = string.find('\n', offset)) != kNotFound) {
     57         operation(offset, newline - offset, false);
     58         offset = newline + 1;
     59     }
     60     if (!offset)
     61         operation(0, string.length(), true);
     62     else {
     63         unsigned length = string.length();
     64         if (length != offset)
     65             operation(offset, length - offset, true);
     66     }
     67 }
     68 
     69 }
     70 
     71 #endif
     72