WebCore/FontFallbackList.h

   1 /*
   2  * This file is part of the internal font implementation.  It should not be included by anyone other than
   3  * FontMac.cpp, FontWin.cpp and Font.cpp.
   4  *
   5  * Copyright (C) 2006 Apple Computer, Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public License
  18  * along with this library; see the file COPYING.LIB.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02110-1301, USA.
  21  *
  22  */
  23
  24 // This file has no guards on purpose in order to detect redundant includes. This is a private header
  25 // and so this may catch someone trying to include this file in public cpp files.
  26
  27 #include "FontSelector.h"
  28 #include "SimpleFontData.h"
  29 #include <wtf/Forward.h>
  30
  31 namespace WebCore {
  32
  33 class Font;
  34 class GraphicsContext;
  35 class IntRect;
  36 class FontDescription;
  37 class FontPlatformData;
  38 class FontSelector;
  39
  40 const int cAllFamiliesScanned = -1;
  41
  42 class FontFallbackList : public RefCounted<FontFallbackList> {
  43 public:
  44     static PassRefPtr<FontFallbackList> create() { return adoptRef(new FontFallbackList()); }
  45
  46     ~FontFallbackList() { releaseFontData(); }
  47     void invalidate(PassRefPtr<FontSelector>);
  48
  49     bool isFixedPitch(const Font* f) const { if (m_pitch == UnknownPitch) determinePitch(f); return m_pitch == FixedPitch; };
  50     void determinePitch(const Font*) const;
  51
  52     bool loadingCustomFonts() const { return m_loadingCustomFonts; }
  53
  54     FontSelector* fontSelector() const { return m_fontSelector.get(); }
  55     unsigned generation() const { return m_generation; }
  56
  57 private:
  58     FontFallbackList();
  59
  60     const FontData* primaryFont(const Font* f) const { return fontDataAt(f, 0); }
  61     const FontData* fontDataAt(const Font*, unsigned index) const;
  62     const FontData* fontDataForCharacters(const Font*, const UChar*, int length) const;
  63
  64     void setPlatformFont(const FontPlatformData&);
  65
  66     void releaseFontData();
  67
  68     mutable Vector<pair<const FontData*, bool>, 1> m_fontList;
  69     mutable int m_familyIndex;
  70     mutable Pitch m_pitch;
  71     mutable bool m_loadingCustomFonts;
  72     RefPtr<FontSelector> m_fontSelector;
  73     unsigned m_generation;
  74
  75     friend class Font;
  76 };
  77
  78 }
  79