1 /* 2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org) 3 * (C) 2000 Antti Koivisto (koivisto@kde.org) 4 * (C) 2000 Dirk Mueller (mueller@kde.org) 5 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 6 * Copyright (C) 2007 Nicholas Shanks <webkit@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 "platform/fonts/FontCacheKey.h" 30 #include "platform/fonts/FontFamily.h" 31 #include "platform/fonts/FontFeatureSettings.h" 32 #include "platform/fonts/FontOrientation.h" 33 #include "platform/fonts/FontSmoothingMode.h" 34 #include "platform/fonts/FontTraitsMask.h" 35 #include "platform/fonts/FontWidthVariant.h" 36 #include "platform/fonts/TextRenderingMode.h" 37 #include "platform/text/NonCJKGlyphOrientation.h" 38 #include "wtf/MathExtras.h" 39 40 #include "wtf/RefPtr.h" 41 42 namespace WebCore { 43 44 enum FontWeight { 45 FontWeight100, 46 FontWeight200, 47 FontWeight300, 48 FontWeight400, 49 FontWeight500, 50 FontWeight600, 51 FontWeight700, 52 FontWeight800, 53 FontWeight900, 54 FontWeightNormal = FontWeight400, 55 FontWeightBold = FontWeight700 56 }; 57 58 enum FontItalic { 59 FontItalicOff = 0, 60 FontItalicOn = 1 61 }; 62 63 enum FontSmallCaps { 64 FontSmallCapsOff = 0, 65 FontSmallCapsOn = 1 66 }; 67 68 class PLATFORM_EXPORT FontDescription { 69 public: 70 enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily, 71 MonospaceFamily, CursiveFamily, FantasyFamily, PictographFamily }; 72 73 enum Kerning { AutoKerning, NormalKerning, NoneKerning }; 74 75 enum LigaturesState { NormalLigaturesState, DisabledLigaturesState, EnabledLigaturesState }; 76 FontDescription()77 FontDescription() 78 : m_specifiedSize(0) 79 , m_computedSize(0) 80 , m_orientation(Horizontal) 81 , m_nonCJKGlyphOrientation(NonCJKGlyphOrientationVerticalRight) 82 , m_widthVariant(RegularWidth) 83 , m_italic(FontItalicOff) 84 , m_smallCaps(FontSmallCapsOff) 85 , m_isAbsoluteSize(false) 86 , m_weight(FontWeightNormal) 87 , m_genericFamily(NoFamily) 88 , m_usePrinterFont(false) 89 , m_kerning(AutoKerning) 90 , m_commonLigaturesState(NormalLigaturesState) 91 , m_discretionaryLigaturesState(NormalLigaturesState) 92 , m_historicalLigaturesState(NormalLigaturesState) 93 , m_keywordSize(0) 94 , m_fontSmoothing(AutoSmoothing) 95 , m_textRendering(AutoTextRendering) 96 , m_isSpecifiedFont(false) 97 , m_script(USCRIPT_COMMON) 98 , m_syntheticBold(false) 99 , m_syntheticItalic(false) 100 , m_subpixelTextPosition(s_useSubpixelTextPositioning) 101 { 102 } 103 104 bool operator==(const FontDescription&) const; 105 bool operator!=(const FontDescription& other) const { return !(*this == other); } 106 family()107 const FontFamily& family() const { return m_familyList; } firstFamily()108 FontFamily& firstFamily() { return m_familyList; } specifiedSize()109 float specifiedSize() const { return m_specifiedSize; } computedSize()110 float computedSize() const { return m_computedSize; } italic()111 FontItalic italic() const { return static_cast<FontItalic>(m_italic); } computedPixelSize()112 int computedPixelSize() const { return int(m_computedSize + 0.5f); } smallCaps()113 FontSmallCaps smallCaps() const { return static_cast<FontSmallCaps>(m_smallCaps); } isAbsoluteSize()114 bool isAbsoluteSize() const { return m_isAbsoluteSize; } weight()115 FontWeight weight() const { return static_cast<FontWeight>(m_weight); } 116 FontWeight lighterWeight() const; 117 FontWeight bolderWeight() const; genericFamily()118 GenericFamilyType genericFamily() const { return static_cast<GenericFamilyType>(m_genericFamily); } usePrinterFont()119 bool usePrinterFont() const { return m_usePrinterFont; } 120 // only use fixed default size when there is only one font family, and that family is "monospace" useFixedDefaultSize()121 bool useFixedDefaultSize() const { return genericFamily() == MonospaceFamily && !family().next() && family().family() == FontFamilyNames::webkit_monospace; } kerning()122 Kerning kerning() const { return static_cast<Kerning>(m_kerning); } commonLigaturesState()123 LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); } discretionaryLigaturesState()124 LigaturesState discretionaryLigaturesState() const { return static_cast<LigaturesState>(m_discretionaryLigaturesState); } historicalLigaturesState()125 LigaturesState historicalLigaturesState() const { return static_cast<LigaturesState>(m_historicalLigaturesState); } keywordSize()126 unsigned keywordSize() const { return m_keywordSize; } fontSmoothing()127 FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); } textRenderingMode()128 TextRenderingMode textRenderingMode() const { return static_cast<TextRenderingMode>(m_textRendering); } script()129 UScriptCode script() const { return static_cast<UScriptCode>(m_script); } isSyntheticBold()130 bool isSyntheticBold() const { return m_syntheticBold; } isSyntheticItalic()131 bool isSyntheticItalic() const { return m_syntheticItalic; } useSubpixelPositioning()132 bool useSubpixelPositioning() const { return m_subpixelTextPosition; } 133 134 FontTraitsMask traitsMask() const; isSpecifiedFont()135 bool isSpecifiedFont() const { return m_isSpecifiedFont; } orientation()136 FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); } nonCJKGlyphOrientation()137 NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); } widthVariant()138 FontWidthVariant widthVariant() const { return static_cast<FontWidthVariant>(m_widthVariant); } featureSettings()139 FontFeatureSettings* featureSettings() const { return m_featureSettings.get(); } 140 FontDescription makeNormalFeatureSettings() const; 141 142 float effectiveFontSize() const; // Returns either the computedSize or the computedPixelSize 143 FontCacheKey cacheKey(const AtomicString& familyName, FontTraitsMask desiredTraits = static_cast<FontTraitsMask>(0)) const; 144 setFamily(const FontFamily & family)145 void setFamily(const FontFamily& family) { m_familyList = family; } setComputedSize(float s)146 void setComputedSize(float s) { m_computedSize = clampToFloat(s); } setSpecifiedSize(float s)147 void setSpecifiedSize(float s) { m_specifiedSize = clampToFloat(s); } setItalic(FontItalic i)148 void setItalic(FontItalic i) { m_italic = i; } setItalic(bool i)149 void setItalic(bool i) { setItalic(i ? FontItalicOn : FontItalicOff); } setSmallCaps(FontSmallCaps c)150 void setSmallCaps(FontSmallCaps c) { m_smallCaps = c; } setSmallCaps(bool c)151 void setSmallCaps(bool c) { setSmallCaps(c ? FontSmallCapsOn : FontSmallCapsOff); } setIsAbsoluteSize(bool s)152 void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; } setWeight(FontWeight w)153 void setWeight(FontWeight w) { m_weight = w; } setGenericFamily(GenericFamilyType genericFamily)154 void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; } 155 #if OS(MACOSX) setUsePrinterFont(bool)156 void setUsePrinterFont(bool) { } 157 #else setUsePrinterFont(bool p)158 void setUsePrinterFont(bool p) { m_usePrinterFont = p; } 159 #endif setKerning(Kerning kerning)160 void setKerning(Kerning kerning) { m_kerning = kerning; } setCommonLigaturesState(LigaturesState commonLigaturesState)161 void setCommonLigaturesState(LigaturesState commonLigaturesState) { m_commonLigaturesState = commonLigaturesState; } setDiscretionaryLigaturesState(LigaturesState discretionaryLigaturesState)162 void setDiscretionaryLigaturesState(LigaturesState discretionaryLigaturesState) { m_discretionaryLigaturesState = discretionaryLigaturesState; } setHistoricalLigaturesState(LigaturesState historicalLigaturesState)163 void setHistoricalLigaturesState(LigaturesState historicalLigaturesState) { m_historicalLigaturesState = historicalLigaturesState; } setKeywordSize(unsigned s)164 void setKeywordSize(unsigned s) { m_keywordSize = s; } setFontSmoothing(FontSmoothingMode smoothing)165 void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; } setTextRenderingMode(TextRenderingMode rendering)166 void setTextRenderingMode(TextRenderingMode rendering) { m_textRendering = rendering; } setIsSpecifiedFont(bool isSpecifiedFont)167 void setIsSpecifiedFont(bool isSpecifiedFont) { m_isSpecifiedFont = isSpecifiedFont; } setOrientation(FontOrientation orientation)168 void setOrientation(FontOrientation orientation) { m_orientation = orientation; } setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation)169 void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; } setWidthVariant(FontWidthVariant widthVariant)170 void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; } setScript(UScriptCode s)171 void setScript(UScriptCode s) { m_script = s; } setSyntheticBold(bool syntheticBold)172 void setSyntheticBold(bool syntheticBold) { m_syntheticBold = syntheticBold; } setSyntheticItalic(bool syntheticItalic)173 void setSyntheticItalic(bool syntheticItalic) { m_syntheticItalic = syntheticItalic; } setFeatureSettings(PassRefPtr<FontFeatureSettings> settings)174 void setFeatureSettings(PassRefPtr<FontFeatureSettings> settings) { m_featureSettings = settings; } 175 void setTraitsMask(FontTraitsMask); 176 setSubpixelPositioning(bool b)177 static void setSubpixelPositioning(bool b) { s_useSubpixelTextPositioning = b; } subpixelPositioning()178 static bool subpixelPositioning() { return s_useSubpixelTextPositioning; } 179 180 private: 181 FontFamily m_familyList; // The list of font families to be used. 182 RefPtr<FontFeatureSettings> m_featureSettings; 183 184 float m_specifiedSize; // Specified CSS value. Independent of rendering issues such as integer 185 // rounding, minimum font sizes, and zooming. 186 float m_computedSize; // Computed size adjusted for the minimum font size and the zoom factor. 187 188 unsigned m_orientation : 1; // FontOrientation - Whether the font is rendering on a horizontal line or a vertical line. 189 unsigned m_nonCJKGlyphOrientation : 1; // NonCJKGlyphOrientation - Only used by vertical text. Determines the default orientation for non-ideograph glyphs. 190 191 unsigned m_widthVariant : 2; // FontWidthVariant 192 193 unsigned m_italic : 1; // FontItalic 194 unsigned m_smallCaps : 1; // FontSmallCaps 195 unsigned m_isAbsoluteSize : 1; // Whether or not CSS specified an explicit size 196 // (logical sizes like "medium" don't count). 197 unsigned m_weight : 8; // FontWeight 198 unsigned m_genericFamily : 3; // GenericFamilyType 199 unsigned m_usePrinterFont : 1; 200 201 unsigned m_kerning : 2; // Kerning 202 203 unsigned m_commonLigaturesState : 2; 204 unsigned m_discretionaryLigaturesState : 2; 205 unsigned m_historicalLigaturesState : 2; 206 207 unsigned m_keywordSize : 4; // We cache whether or not a font is currently represented by a CSS keyword (e.g., medium). If so, 208 // then we can accurately translate across different generic families to adjust for different preference settings 209 // (e.g., 13px monospace vs. 16px everything else). Sizes are 1-8 (like the HTML size values for <font>). 210 211 unsigned m_fontSmoothing : 2; // FontSmoothingMode 212 unsigned m_textRendering : 2; // TextRenderingMode 213 unsigned m_isSpecifiedFont : 1; // True if a web page specifies a non-generic font family as the first font family. 214 unsigned m_script : 7; // Used to help choose an appropriate font for generic font families. 215 unsigned m_syntheticBold : 1; 216 unsigned m_syntheticItalic : 1; 217 unsigned m_subpixelTextPosition : 1; 218 219 static bool s_useSubpixelTextPositioning; 220 }; 221 222 inline bool FontDescription::operator==(const FontDescription& other) const 223 { 224 return m_familyList == other.m_familyList 225 && m_specifiedSize == other.m_specifiedSize 226 && m_computedSize == other.m_computedSize 227 && m_italic == other.m_italic 228 && m_smallCaps == other.m_smallCaps 229 && m_isAbsoluteSize == other.m_isAbsoluteSize 230 && m_weight == other.m_weight 231 && m_genericFamily == other.m_genericFamily 232 && m_usePrinterFont == other.m_usePrinterFont 233 && m_kerning == other.m_kerning 234 && m_commonLigaturesState == other.m_commonLigaturesState 235 && m_discretionaryLigaturesState == other.m_discretionaryLigaturesState 236 && m_historicalLigaturesState == other.m_historicalLigaturesState 237 && m_keywordSize == other.m_keywordSize 238 && m_fontSmoothing == other.m_fontSmoothing 239 && m_textRendering == other.m_textRendering 240 && m_isSpecifiedFont == other.m_isSpecifiedFont 241 && m_orientation == other.m_orientation 242 && m_nonCJKGlyphOrientation == other.m_nonCJKGlyphOrientation 243 && m_widthVariant == other.m_widthVariant 244 && m_script == other.m_script 245 && m_syntheticBold == other.m_syntheticBold 246 && m_syntheticItalic == other.m_syntheticItalic 247 && m_featureSettings == other.m_featureSettings 248 && m_subpixelTextPosition == other.m_subpixelTextPosition; 249 } 250 251 } 252 253 #endif 254