1 /* 2 * Copyright (C) 2006, 2010 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #ifndef FontFallbackList_h 22 #define FontFallbackList_h 23 24 #include "FontSelector.h" 25 #include "SimpleFontData.h" 26 #include <wtf/Forward.h> 27 28 namespace WebCore { 29 30 class Font; 31 class GlyphPageTreeNode; 32 class GraphicsContext; 33 class IntRect; 34 class FontDescription; 35 class FontPlatformData; 36 class FontSelector; 37 38 const int cAllFamiliesScanned = -1; 39 40 class FontFallbackList : public RefCounted<FontFallbackList> { 41 public: create()42 static PassRefPtr<FontFallbackList> create() { return adoptRef(new FontFallbackList()); } 43 ~FontFallbackList()44 ~FontFallbackList() { releaseFontData(); } 45 void invalidate(PassRefPtr<FontSelector>); 46 isFixedPitch(const Font * f)47 bool isFixedPitch(const Font* f) const { if (m_pitch == UnknownPitch) determinePitch(f); return m_pitch == FixedPitch; }; 48 void determinePitch(const Font*) const; 49 loadingCustomFonts()50 bool loadingCustomFonts() const { return m_loadingCustomFonts; } 51 fontSelector()52 FontSelector* fontSelector() const { return m_fontSelector.get(); } generation()53 unsigned generation() const { return m_generation; } 54 55 private: 56 FontFallbackList(); 57 primarySimpleFontData(const Font * f)58 const SimpleFontData* primarySimpleFontData(const Font* f) 59 { 60 ASSERT(isMainThread()); 61 if (!m_cachedPrimarySimpleFontData) 62 m_cachedPrimarySimpleFontData = primaryFontData(f)->fontDataForCharacter(' '); 63 return m_cachedPrimarySimpleFontData; 64 } 65 primaryFontData(const Font * f)66 const FontData* primaryFontData(const Font* f) const { return fontDataAt(f, 0); } 67 const FontData* fontDataAt(const Font*, unsigned index) const; 68 69 void setPlatformFont(const FontPlatformData&); 70 71 void releaseFontData(); 72 73 mutable Vector<pair<const FontData*, bool>, 1> m_fontList; 74 mutable HashMap<int, GlyphPageTreeNode*> m_pages; 75 mutable GlyphPageTreeNode* m_pageZero; 76 mutable const SimpleFontData* m_cachedPrimarySimpleFontData; 77 RefPtr<FontSelector> m_fontSelector; 78 mutable int m_familyIndex; 79 mutable Pitch m_pitch; 80 mutable bool m_loadingCustomFonts; 81 unsigned m_generation; 82 83 friend class Font; 84 }; 85 86 } 87 88 #endif 89