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, 2013 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 "FontFeatureSettings.h" 29#include "FontOrientation.h" 30#include "FontRenderingMode.h" 31#include "FontSmoothingMode.h" 32#include "FontTraitsMask.h" 33#include "FontWidthVariant.h" 34#include "NonCJKGlyphOrientation.h" 35#include "TextRenderingMode.h" 36#include "WebKitFontFamilyNames.h" 37#include <unicode/uscript.h> 38#include <wtf/MathExtras.h> 39#include <wtf/RefCountedArray.h> 40#include <wtf/RefPtr.h> 41 42namespace WebCore { 43 44using namespace WebKitFontFamilyNames; 45 46enum FontWeight { 47 FontWeight100, 48 FontWeight200, 49 FontWeight300, 50 FontWeight400, 51 FontWeight500, 52 FontWeight600, 53 FontWeight700, 54 FontWeight800, 55 FontWeight900, 56 FontWeightNormal = FontWeight400, 57 FontWeightBold = FontWeight700 58}; 59 60enum FontItalic { 61 FontItalicOff = 0, 62 FontItalicOn = 1 63}; 64 65enum FontSmallCaps { 66 FontSmallCapsOff = 0, 67 FontSmallCapsOn = 1 68}; 69 70class FontDescription { 71public: 72 enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily, 73 MonospaceFamily, CursiveFamily, FantasyFamily, PictographFamily }; 74 75 enum Kerning { AutoKerning, NormalKerning, NoneKerning }; 76 77 enum LigaturesState { NormalLigaturesState, DisabledLigaturesState, EnabledLigaturesState }; 78 79 FontDescription() 80 : m_families(1) 81 , m_specifiedSize(0) 82 , m_computedSize(0) 83 , m_orientation(Horizontal) 84 , m_nonCJKGlyphOrientation(NonCJKGlyphOrientationVerticalRight) 85 , m_widthVariant(RegularWidth) 86 , m_italic(FontItalicOff) 87 , m_smallCaps(FontSmallCapsOff) 88 , m_isAbsoluteSize(false) 89 , m_weight(FontWeightNormal) 90 , m_genericFamily(NoFamily) 91 , m_usePrinterFont(false) 92 , m_renderingMode(NormalRenderingMode) 93 , m_kerning(AutoKerning) 94 , m_commonLigaturesState(NormalLigaturesState) 95 , m_discretionaryLigaturesState(NormalLigaturesState) 96 , m_historicalLigaturesState(NormalLigaturesState) 97 , m_keywordSize(0) 98 , m_fontSmoothing(AutoSmoothing) 99 , m_textRendering(AutoTextRendering) 100 , m_isSpecifiedFont(false) 101 , m_script(USCRIPT_COMMON) 102 { 103 } 104 105 bool operator==(const FontDescription&) const; 106 bool operator!=(const FontDescription& other) const { return !(*this == other); } 107 108 unsigned familyCount() const { return m_families.size(); } 109 const AtomicString& firstFamily() const { return familyAt(0); } 110 const AtomicString& familyAt(unsigned i) const { return m_families[i]; } 111 const RefCountedArray<AtomicString>& families() const { return m_families; } 112 113 float specifiedSize() const { return m_specifiedSize; } 114 float computedSize() const { return m_computedSize; } 115 FontItalic italic() const { return static_cast<FontItalic>(m_italic); } 116 int computedPixelSize() const { return int(m_computedSize + 0.5f); } 117 FontSmallCaps smallCaps() const { return static_cast<FontSmallCaps>(m_smallCaps); } 118 bool isAbsoluteSize() const { return m_isAbsoluteSize; } 119 FontWeight weight() const { return static_cast<FontWeight>(m_weight); } 120 FontWeight lighterWeight() const; 121 FontWeight bolderWeight() const; 122 GenericFamilyType genericFamily() const { return static_cast<GenericFamilyType>(m_genericFamily); } 123 bool usePrinterFont() const { return m_usePrinterFont; } 124 // only use fixed default size when there is only one font family, and that family is "monospace" 125 bool useFixedDefaultSize() const { return genericFamily() == MonospaceFamily && familyCount() == 1 && firstFamily() == monospaceFamily; } 126 FontRenderingMode renderingMode() const { return static_cast<FontRenderingMode>(m_renderingMode); } 127 Kerning kerning() const { return static_cast<Kerning>(m_kerning); } 128 LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); } 129 LigaturesState discretionaryLigaturesState() const { return static_cast<LigaturesState>(m_discretionaryLigaturesState); } 130 LigaturesState historicalLigaturesState() const { return static_cast<LigaturesState>(m_historicalLigaturesState); } 131 unsigned keywordSize() const { return m_keywordSize; } 132 FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); } 133 TextRenderingMode textRenderingMode() const { return static_cast<TextRenderingMode>(m_textRendering); } 134 UScriptCode script() const { return static_cast<UScriptCode>(m_script); } 135 136 FontTraitsMask traitsMask() const; 137 bool isSpecifiedFont() const { return m_isSpecifiedFont; } 138 FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); } 139 NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); } 140 FontWidthVariant widthVariant() const { return static_cast<FontWidthVariant>(m_widthVariant); } 141 FontFeatureSettings* featureSettings() const { return m_featureSettings.get(); } 142 FontDescription makeNormalFeatureSettings() const; 143 144 void setOneFamily(const AtomicString& family) { ASSERT(m_families.size() == 1); m_families[0] = family; } 145 void setFamilies(const Vector<AtomicString>& families) { m_families = RefCountedArray<AtomicString>(families); } 146 void setFamilies(const RefCountedArray<AtomicString>& families) { m_families = families; } 147 void setComputedSize(float s) { m_computedSize = clampToFloat(s); } 148 void setSpecifiedSize(float s) { m_specifiedSize = clampToFloat(s); } 149 void setItalic(FontItalic i) { m_italic = i; } 150 void setItalic(bool i) { setItalic(i ? FontItalicOn : FontItalicOff); } 151 void setSmallCaps(FontSmallCaps c) { m_smallCaps = c; } 152 void setSmallCaps(bool c) { setSmallCaps(c ? FontSmallCapsOn : FontSmallCapsOff); } 153 void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; } 154 void setWeight(FontWeight w) { m_weight = w; } 155 void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; } 156 void setUsePrinterFont(bool p) { m_usePrinterFont = p; } 157 void setRenderingMode(FontRenderingMode mode) { m_renderingMode = mode; } 158 void setKerning(Kerning kerning) { m_kerning = kerning; } 159 void setCommonLigaturesState(LigaturesState commonLigaturesState) { m_commonLigaturesState = commonLigaturesState; } 160 void setDiscretionaryLigaturesState(LigaturesState discretionaryLigaturesState) { m_discretionaryLigaturesState = discretionaryLigaturesState; } 161 void setHistoricalLigaturesState(LigaturesState historicalLigaturesState) { m_historicalLigaturesState = historicalLigaturesState; } 162 void setKeywordSize(unsigned s) { m_keywordSize = s; } 163 void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; } 164 void setTextRenderingMode(TextRenderingMode rendering) { m_textRendering = rendering; } 165 void setIsSpecifiedFont(bool isSpecifiedFont) { m_isSpecifiedFont = isSpecifiedFont; } 166 void setOrientation(FontOrientation orientation) { m_orientation = orientation; } 167 void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; } 168 void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; } 169 void setScript(UScriptCode s) { m_script = s; } 170 void setFeatureSettings(PassRefPtr<FontFeatureSettings> settings) { m_featureSettings = settings; } 171 172#if ENABLE(IOS_TEXT_AUTOSIZING) 173 bool familiesEqualForTextAutoSizing(const FontDescription& other) const; 174 175 bool equalForTextAutoSizing(const FontDescription& other) const 176 { 177 return familiesEqualForTextAutoSizing(other) 178 && m_specifiedSize == other.m_specifiedSize 179 && m_smallCaps == other.m_smallCaps 180 && m_isAbsoluteSize == other.m_isAbsoluteSize 181 && m_genericFamily == other.m_genericFamily 182 && m_usePrinterFont == other.m_usePrinterFont; 183 } 184#endif 185 186private: 187 RefCountedArray<AtomicString> m_families; 188 RefPtr<FontFeatureSettings> m_featureSettings; 189 190 float m_specifiedSize; // Specified CSS value. Independent of rendering issues such as integer 191 // rounding, minimum font sizes, and zooming. 192 float m_computedSize; // Computed size adjusted for the minimum font size and the zoom factor. 193 194 unsigned m_orientation : 1; // FontOrientation - Whether the font is rendering on a horizontal line or a vertical line. 195 unsigned m_nonCJKGlyphOrientation : 1; // NonCJKGlyphOrientation - Only used by vertical text. Determines the default orientation for non-ideograph glyphs. 196 197 unsigned m_widthVariant : 2; // FontWidthVariant 198 199 unsigned m_italic : 1; // FontItalic 200 unsigned m_smallCaps : 1; // FontSmallCaps 201 unsigned m_isAbsoluteSize : 1; // Whether or not CSS specified an explicit size 202 // (logical sizes like "medium" don't count). 203 unsigned m_weight : 8; // FontWeight 204 unsigned m_genericFamily : 3; // GenericFamilyType 205 unsigned m_usePrinterFont : 1; 206 207 unsigned m_renderingMode : 1; // Used to switch between CG and GDI text on Windows. 208 unsigned m_kerning : 2; // Kerning 209 210 unsigned m_commonLigaturesState : 2; 211 unsigned m_discretionaryLigaturesState : 2; 212 unsigned m_historicalLigaturesState : 2; 213 214 unsigned m_keywordSize : 4; // We cache whether or not a font is currently represented by a CSS keyword (e.g., medium). If so, 215 // then we can accurately translate across different generic families to adjust for different preference settings 216 // (e.g., 13px monospace vs. 16px everything else). Sizes are 1-8 (like the HTML size values for <font>). 217 218 unsigned m_fontSmoothing : 2; // FontSmoothingMode 219 unsigned m_textRendering : 2; // TextRenderingMode 220 unsigned m_isSpecifiedFont : 1; // True if a web page specifies a non-generic font family as the first font family. 221 unsigned m_script : 7; // Used to help choose an appropriate font for generic font families. 222}; 223 224inline bool FontDescription::operator==(const FontDescription& other) const 225{ 226 return m_families == other.m_families 227 && m_specifiedSize == other.m_specifiedSize 228 && m_computedSize == other.m_computedSize 229 && m_italic == other.m_italic 230 && m_smallCaps == other.m_smallCaps 231 && m_isAbsoluteSize == other.m_isAbsoluteSize 232 && m_weight == other.m_weight 233 && m_genericFamily == other.m_genericFamily 234 && m_usePrinterFont == other.m_usePrinterFont 235 && m_renderingMode == other.m_renderingMode 236 && m_kerning == other.m_kerning 237 && m_commonLigaturesState == other.m_commonLigaturesState 238 && m_discretionaryLigaturesState == other.m_discretionaryLigaturesState 239 && m_historicalLigaturesState == other.m_historicalLigaturesState 240 && m_keywordSize == other.m_keywordSize 241 && m_fontSmoothing == other.m_fontSmoothing 242 && m_textRendering == other.m_textRendering 243 && m_isSpecifiedFont == other.m_isSpecifiedFont 244 && m_orientation == other.m_orientation 245 && m_nonCJKGlyphOrientation == other.m_nonCJKGlyphOrientation 246 && m_widthVariant == other.m_widthVariant 247 && m_script == other.m_script 248 && m_featureSettings == other.m_featureSettings; 249} 250 251} 252 253#endif 254