WebCore/WidthIterator.h

   1 /*
   2  * Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
   3  * Copyright (C) 2008 Holger Hans Peter Freyther
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  *
  20  */
  21
  22 #ifndef WidthIterator_h
  23 #define WidthIterator_h
  24
  25 #include <wtf/unicode/Unicode.h>
  26
  27 namespace WebCore {
  28
  29 class Font;
  30 class GlyphBuffer;
  31 class TextRun;
  32
  33 struct WidthIterator {
  34     WidthIterator(const Font*, const TextRun&);
  35
  36     void advance(int to, GlyphBuffer* = 0);
  37     bool advanceOneCharacter(float& width, GlyphBuffer* = 0);
  38
  39     const Font* m_font;
  40
  41     const TextRun& m_run;
  42     int m_end;
  43
  44     unsigned m_currentCharacter;
  45     float m_runWidthSoFar;
  46     float m_padding;
  47     float m_padPerSpace;
  48     float m_finalRoundingWidth;
  49
  50 private:
  51     UChar32 normalizeVoicingMarks(int currentCharacter);
  52 };
  53
  54 }
  55
  56 #endif