WebCore/SimpleFontData.h

   1 /*
   2  * This file is part of the internal font implementation.
   3  *
   4  * Copyright (C) 2006, 2008 Apple 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 SimpleFontData_h
  24 #define SimpleFontData_h
  25
  26 #include "FontData.h"
  27 #include "FontPlatformData.h"
  28 #include "GlyphPageTreeNode.h"
  29 #include "GlyphWidthMap.h"
  30 #include <wtf/OwnPtr.h>
  31
  32 #if USE(ATSUI)
  33 typedef struct OpaqueATSUStyle* ATSUStyle;
  34 #endif
  35
  36 #if PLATFORM(WIN)
  37 #include <usp10.h>
  38 #endif
  39
  40 #if PLATFORM(CAIRO)
  41 #include <cairo.h>
  42 #endif
  43
  44 #if PLATFORM(QT)
  45 #include <QFont>
  46 #endif
  47
  48 namespace WebCore {
  49
  50 class FontDescription;
  51 class FontPlatformData;
  52 class SharedBuffer;
  53 class SVGFontData;
  54 class WidthMap;
  55
  56 enum Pitch { UnknownPitch, FixedPitch, VariablePitch };
  57
  58 class SimpleFontData : public FontData {
  59 public:
  60     SimpleFontData(const FontPlatformData&, bool customFont = false, bool loading = false, SVGFontData* data = 0);
  61     virtual ~SimpleFontData();
  62
  63 public:
  64     const FontPlatformData& platformData() const { return m_font; }
  65     SimpleFontData* smallCapsFontData(const FontDescription& fontDescription) const;
  66
  67     // vertical metrics
  68     int ascent() const { return m_ascent; }
  69     int descent() const { return m_descent; }
  70     int lineSpacing() const { return m_lineSpacing; }
  71     int lineGap() const { return m_lineGap; }
  72     float xHeight() const { return m_xHeight; }
  73     unsigned unitsPerEm() const { return m_unitsPerEm; }
  74
  75     float widthForGlyph(Glyph) const;
  76     float platformWidthForGlyph(Glyph) const;
  77
  78     virtual const SimpleFontData* fontDataForCharacter(UChar32) const;
  79     virtual bool containsCharacters(const UChar*, int length) const;
  80
  81     void determinePitch();
  82     Pitch pitch() const { return m_treatAsFixedPitch ? FixedPitch : VariablePitch; }
  83
  84 #if ENABLE(SVG_FONTS)
  85     SVGFontData* svgFontData() const { return m_svgFontData.get(); }
  86     bool isSVGFont() const { return m_svgFontData; }
  87 #else
  88     bool isSVGFont() const { return false; }
  89 #endif
  90
  91     virtual bool isCustomFont() const { return m_isCustomFont; }
  92     virtual bool isLoading() const { return m_isLoading; }
  93     virtual bool isSegmented() const;
  94
  95     const GlyphData& missingGlyphData() const { return m_missingGlyphData; }
  96
  97     GSFontRef getGSFont() const { return m_font.font(); }
  98     bool isImageFont() const { return m_font.m_isImageFont; };
  99
 100 #if USE(CORE_TEXT)
 101     CTFontRef getCTFont() const;
 102     CFDictionaryRef getCFStringAttributes() const;
 103 #endif
 104
 105 #if USE(ATSUI)
 106     void checkShapesArabic() const;
 107     bool shapesArabic() const
 108     {
 109         if (!m_checkedShapesArabic)
 110             checkShapesArabic();
 111         return m_shapesArabic;
 112     }
 113 #endif
 114
 115 #if PLATFORM(QT)
 116     QFont getQtFont() const { return m_font.font(); }
 117 #endif
 118
 119 #if PLATFORM(WIN)
 120     bool isSystemFont() const { return m_isSystemFont; }
 121     SCRIPT_FONTPROPERTIES* scriptFontProperties() const;
 122     SCRIPT_CACHE* scriptCache() const { return &m_scriptCache; }
 123
 124     static void setShouldApplyMacAscentHack(bool);
 125     static bool shouldApplyMacAscentHack();
 126 #endif
 127
 128 #if PLATFORM(CAIRO)
 129     void setFont(cairo_t*) const;
 130 #endif
 131
 132 #if PLATFORM(WX)
 133     wxFont getWxFont() const { return m_font.font(); }
 134 #endif
 135
 136 private:
 137     void platformInit();
 138     void platformGlyphInit();
 139     void platformDestroy();
 140
 141     void commonInit();
 142
 143 #if PLATFORM(WIN)
 144     void initGDIFont();
 145     void platformCommonDestroy();
 146     float widthForGDIGlyph(Glyph glyph) const;
 147 #endif
 148
 149 public:
 150     int m_ascent;
 151     int m_descent;
 152     int m_lineSpacing;
 153     int m_lineGap;
 154     float m_xHeight;
 155     unsigned m_unitsPerEm;
 156
 157     FontPlatformData m_font;
 158
 159     mutable GlyphWidthMap m_glyphToWidthMap;
 160
 161     bool m_treatAsFixedPitch;
 162
 163 #if ENABLE(SVG_FONTS)
 164     OwnPtr<SVGFontData> m_svgFontData;
 165 #endif
 166
 167     bool m_isCustomFont;  // Whether or not we are custom font loaded via @font-face
 168     bool m_isLoading; // Whether or not this custom font is still in the act of loading.
 169
 170     Glyph m_spaceGlyph;
 171     float m_spaceWidth;
 172     float m_adjustedSpaceWidth;
 173
 174     GlyphData m_missingGlyphData;
 175
 176     mutable SimpleFontData* m_smallCapsFontData;
 177
 178 #if PLATFORM(CG) || PLATFORM(WIN)
 179     float m_syntheticBoldOffset;
 180 #endif
 181
 182
 183 #if USE(ATSUI)
 184     mutable ATSUStyle m_ATSUStyle;
 185     mutable bool m_ATSUStyleInitialized;
 186     mutable bool m_ATSUMirrors;
 187     mutable bool m_checkedShapesArabic;
 188     mutable bool m_shapesArabic;
 189 #endif
 190
 191 #if USE(CORE_TEXT)
 192     mutable RetainPtr<CTFontRef> m_CTFont;
 193     mutable RetainPtr<CFDictionaryRef> m_CFStringAttributes;
 194 #endif
 195
 196 #if PLATFORM(WIN)
 197     bool m_isSystemFont;
 198     mutable SCRIPT_CACHE m_scriptCache;
 199     mutable SCRIPT_FONTPROPERTIES* m_scriptFontProperties;
 200 #endif
 201 };
 202
 203 } // namespace WebCore
 204
 205 #endif // SimpleFontData_h