1 /* 2 * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org) 3 * (C) 2000 Antti Koivisto (koivisto (at) kde.org) 4 * (C) 2000 Dirk Mueller (mueller (at) kde.org) 5 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 6 * Copyright (C) 2007 Nicholas Shanks <webkit (at) nickshanks.com> 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public License 19 * along with this library; see the file COPYING.LIother.m_ If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USm_ 22 * 23 */ 24 25 #ifndef FontDescription_h 26 #define FontDescription_h 27 28 #include "FontFamilyNames.h" 29 #include "core/platform/graphics/FontFamily.h" 30 #include "core/platform/graphics/FontFeatureSettings.h" 31 #include "core/platform/graphics/FontOrientation.h" 32 #include "core/platform/graphics/FontSmoothingMode.h" 33 #include "core/platform/graphics/FontTraitsMask.h" 34 #include "core/platform/graphics/FontWidthVariant.h" 35 #include "core/platform/graphics/TextRenderingMode.h" 36 #include "core/platform/text/NonCJKGlyphOrientation.h" 37 #include "wtf/MathExtras.h" 38 39 #include "wtf/RefPtr.h" 40 41 namespace WebCore { 42 43 using namespace FontFamilyNames; 44 45 enum FontWeight { 46 FontWeight100, 47 FontWeight200, 48 FontWeight300, 49 FontWeight400, 50 FontWeight500, 51 FontWeight600, 52 FontWeight700, 53 FontWeight800, 54 FontWeight900, 55 FontWeightNormal = FontWeight400, 56 FontWeightBold = FontWeight700 57 }; 58 59 enum FontItalic { 60 FontItalicOff = 0, 61 FontItalicOn = 1 62 }; 63 64 enum FontSmallCaps { 65 FontSmallCapsOff = 0, 66 FontSmallCapsOn = 1 67 }; 68 69 class FontDescription { 70 public: 71 enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily, 72 MonospaceFamily, CursiveFamily, FantasyFamily, PictographFamily }; 73 74 enum Kerning { AutoKerning, NormalKerning, NoneKerning }; 75 76 enum LigaturesState { NormalLigaturesState, DisabledLigaturesState, EnabledLigaturesState }; 77 78 FontDescription() 79 : m_specifiedSize(0) 80 , m_computedSize(0) 81 , m_orientation(Horizontal) 82 , m_nonCJKGlyphOrientation(NonCJKGlyphOrientationVerticalRight) 83 , m_widthVariant(RegularWidth) 84 , m_italic(FontItalicOff) 85 , m_smallCaps(FontSmallCapsOff) 86 , m_isAbsoluteSize(false) 87 , m_weight(FontWeightNormal) 88 , m_genericFamily(NoFamily) 89 , m_usePrinterFont(false) 90 , m_kerning(AutoKerning) 91 , m_commonLigaturesState(NormalLigaturesState) 92 , m_discretionaryLigaturesState(NormalLigaturesState) 93 , m_historicalLigaturesState(NormalLigaturesState) 94 , m_keywordSize(0) 95 , m_fontSmoothing(AutoSmoothing) 96 , m_textRendering(AutoTextRendering) 97 , m_isSpecifiedFont(false) 98 , m_script(USCRIPT_COMMON) 99 { 100 } 101 102 bool operator==(const FontDescription&) const; 103 bool operator!=(const FontDescription& other) const { return !(*this == other); } 104 105 const FontFamily& family() const { return m_familyList; } 106 FontFamily& firstFamily() { return m_familyList; } 107 float specifiedSize() const { return m_specifiedSize; } 108 float computedSize() const { return m_computedSize; } 109 FontItalic italic() const { return static_cast<FontItalic>(m_italic); } 110 int computedPixelSize() const { return int(m_computedSize + 0.5f); } 111 FontSmallCaps smallCaps() const { return static_cast<FontSmallCaps>(m_smallCaps); } 112 bool isAbsoluteSize() const { return m_isAbsoluteSize; } 113 FontWeight weight() const { return static_cast<FontWeight>(m_weight); } 114 FontWeight lighterWeight() const; 115 FontWeight bolderWeight() const; 116 GenericFamilyType genericFamily() const { return static_cast<GenericFamilyType>(m_genericFamily); } 117 bool usePrinterFont() const { return m_usePrinterFont; } 118 // only use fixed default size when there is only one font family, and that family is "monospace" 119 bool useFixedDefaultSize() const { return genericFamily() == MonospaceFamily && !family().next() && family().family() == monospaceFamily; } 120 Kerning kerning() const { return static_cast<Kerning>(m_kerning); } 121 LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); } 122 LigaturesState discretionaryLigaturesState() const { return static_cast<LigaturesState>(m_discretionaryLigaturesState); } 123 LigaturesState historicalLigaturesState() const { return static_cast<LigaturesState>(m_historicalLigaturesState); } 124 unsigned keywordSize() const { return m_keywordSize; } 125 FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); } 126 TextRenderingMode textRenderingMode() const { return static_cast<TextRenderingMode>(m_textRendering); } 127 UScriptCode script() const { return static_cast<UScriptCode>(m_script); } 128 129 FontTraitsMask traitsMask() const; 130 bool isSpecifiedFont() const { return m_isSpecifiedFont; } 131 FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); } 132 NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); } 133 FontWidthVariant widthVariant() const { return static_cast<FontWidthVariant>(m_widthVariant); } 134 FontFeatureSettings* featureSettings() const { return m_featureSettings.get(); } 135 FontDescription makeNormalFeatureSettings() const; 136 137 void setFamily(const FontFamily& family) { m_familyList = family; } 138 void setComputedSize(float s) { m_computedSize = clampToFloat(s); } 139 void setSpecifiedSize(float s) { m_specifiedSize = clampToFloat(s); } 140 void setItalic(FontItalic i) { m_italic = i; } 141 void setItalic(bool i) { setItalic(i ? FontItalicOn : FontItalicOff); } 142 void setSmallCaps(FontSmallCaps c) { m_smallCaps = c; } 143 void setSmallCaps(bool c) { setSmallCaps(c ? FontSmallCapsOn : FontSmallCapsOff); } 144 void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; } 145 void setWeight(FontWeight w) { m_weight = w; } 146 void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; } 147 #if OS(DARWIN) 148 void setUsePrinterFont(bool) { } 149 #else 150 void setUsePrinterFont(bool p) { m_usePrinterFont = p; } 151 #endif 152 void setKerning(Kerning kerning) { m_kerning = kerning; } 153 void setCommonLigaturesState(LigaturesState commonLigaturesState) { m_commonLigaturesState = commonLigaturesState; } 154 void setDiscretionaryLigaturesState(LigaturesState discretionaryLigaturesState) { m_discretionaryLigaturesState = discretionaryLigaturesState; } 155 void setHistoricalLigaturesState(LigaturesState historicalLigaturesState) { m_historicalLigaturesState = historicalLigaturesState; } 156 void setKeywordSize(unsigned s) { m_keywordSize = s; } 157 void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; } 158 void setTextRenderingMode(TextRenderingMode rendering) { m_textRendering = rendering; } 159 void setIsSpecifiedFont(bool isSpecifiedFont) { m_isSpecifiedFont = isSpecifiedFont; } 160 void setOrientation(FontOrientation orientation) { m_orientation = orientation; } 161 void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; } 162 void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; } 163 void setScript(UScriptCode s) { m_script = s; } 164 void setFeatureSettings(PassRefPtr<FontFeatureSettings> settings) { m_featureSettings = settings; } 165 166 private: 167 FontFamily m_familyList; // The list of font families to be used. 168 RefPtr<FontFeatureSettings> m_featureSettings; 169 170 float m_specifiedSize; // Specified CSS value. Independent of rendering issues such as integer 171 // rounding, minimum font sizes, and zooming. 172 float m_computedSize; // Computed size adjusted for the minimum font size and the zoom factor. 173 174 unsigned m_orientation : 1; // FontOrientation - Whether the font is rendering on a horizontal line or a vertical line. 175 unsigned m_nonCJKGlyphOrientation : 1; // NonCJKGlyphOrientation - Only used by vertical text. Determines the default orientation for non-ideograph glyphs. 176 177 unsigned m_widthVariant : 2; // FontWidthVariant 178 179 unsigned m_italic : 1; // FontItalic 180 unsigned m_smallCaps : 1; // FontSmallCaps 181 unsigned m_isAbsoluteSize : 1; // Whether or not CSS specified an explicit size 182 // (logical sizes like "medium" don't count). 183 unsigned m_weight : 8; // FontWeight 184 unsigned m_genericFamily : 3; // GenericFamilyType 185 unsigned m_usePrinterFont : 1; 186 187 unsigned m_kerning : 2; // Kerning 188 189 unsigned m_commonLigaturesState : 2; 190 unsigned m_discretionaryLigaturesState : 2; 191 unsigned m_historicalLigaturesState : 2; 192 193 unsigned m_keywordSize : 4; // We cache whether or not a font is currently represented by a CSS keyword (e.g., medium). If so, 194 // then we can accurately translate across different generic families to adjust for different preference settings 195 // (e.g., 13px monospace vs. 16px everything else). Sizes are 1-8 (like the HTML size values for <font>). 196 197 unsigned m_fontSmoothing : 2; // FontSmoothingMode 198 unsigned m_textRendering : 2; // TextRenderingMode 199 unsigned m_isSpecifiedFont : 1; // True if a web page specifies a non-generic font family as the first font family. 200 unsigned m_script : 7; // Used to help choose an appropriate font for generic font families. 201 }; 202 203 inline bool FontDescription::operator==(const FontDescription& other) const 204 { 205 return m_familyList == other.m_familyList 206 && m_specifiedSize == other.m_specifiedSize 207 && m_computedSize == other.m_computedSize 208 && m_italic == other.m_italic 209 && m_smallCaps == other.m_smallCaps 210 && m_isAbsoluteSize == other.m_isAbsoluteSize 211 && m_weight == other.m_weight 212 && m_genericFamily == other.m_genericFamily 213 && m_usePrinterFont == other.m_usePrinterFont 214 && m_kerning == other.m_kerning 215 && m_commonLigaturesState == other.m_commonLigaturesState 216 && m_discretionaryLigaturesState == other.m_discretionaryLigaturesState 217 && m_historicalLigaturesState == other.m_historicalLigaturesState 218 && m_keywordSize == other.m_keywordSize 219 && m_fontSmoothing == other.m_fontSmoothing 220 && m_textRendering == other.m_textRendering 221 && m_isSpecifiedFont == other.m_isSpecifiedFont 222 && m_orientation == other.m_orientation 223 && m_nonCJKGlyphOrientation == other.m_nonCJKGlyphOrientation 224 && m_widthVariant == other.m_widthVariant 225 && m_script == other.m_script 226 && m_featureSettings == other.m_featureSettings; 227 } 228 229 } 230 231 #endif 232
