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      1 /*
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org)
      3  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
      4  * Copyright (C) 2010 Google Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef LineBreaker_h
     24 #define LineBreaker_h
     25 
     26 #include "core/rendering/InlineIterator.h"
     27 #include "core/rendering/line/LineInfo.h"
     28 #include "wtf/Vector.h"
     29 
     30 namespace blink {
     31 
     32 enum WhitespacePosition { LeadingWhitespace, TrailingWhitespace };
     33 
     34 struct RenderTextInfo;
     35 
     36 class LineBreaker {
     37 public:
     38     friend class BreakingContext;
     39     LineBreaker(RenderBlockFlow* block)
     40         : m_block(block)
     41     {
     42         reset();
     43     }
     44 
     45     InlineIterator nextLineBreak(InlineBidiResolver&, LineInfo&, RenderTextInfo&,
     46         FloatingObject* lastFloatFromPreviousLine, WordMeasurements&);
     47 
     48     bool lineWasHyphenated() { return m_hyphenated; }
     49     const Vector<RenderBox*>& positionedObjects() { return m_positionedObjects; }
     50     EClear clear() { return m_clear; }
     51 private:
     52     void reset();
     53 
     54     void skipLeadingWhitespace(InlineBidiResolver&, LineInfo&, FloatingObject* lastFloatFromPreviousLine, LineWidth&);
     55 
     56     RenderBlockFlow* m_block;
     57     bool m_hyphenated;
     58     EClear m_clear;
     59     Vector<RenderBox*> m_positionedObjects;
     60 };
     61 
     62 }
     63 
     64 #endif // LineBreaker_h
     65