/* * Copyright (C) 2000 Lars Knoll (knoll@kde.org) * (C) 2000 Antti Koivisto (koivisto@kde.org) * (C) 2000 Dirk Mueller (mueller@kde.org) * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. * Copyright (C) 2007 Nicholas Shanks * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public License * along with this library; see the file COPYING.LIother.m_ If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USm_ * */ #ifndef SKY_ENGINE_PLATFORM_FONTS_FONTDESCRIPTION_H_ #define SKY_ENGINE_PLATFORM_FONTS_FONTDESCRIPTION_H_ #include "gen/sky/platform/FontFamilyNames.h" #include "sky/engine/platform/fonts/FixedPitchFontType.h" #include "sky/engine/platform/fonts/FontCacheKey.h" #include "sky/engine/platform/fonts/FontFamily.h" #include "sky/engine/platform/fonts/FontFeatureSettings.h" #include "sky/engine/platform/fonts/FontOrientation.h" #include "sky/engine/platform/fonts/FontSmoothingMode.h" #include "sky/engine/platform/fonts/FontTraits.h" #include "sky/engine/platform/fonts/FontWidthVariant.h" #include "sky/engine/platform/fonts/TextRenderingMode.h" #include "sky/engine/platform/fonts/TypesettingFeatures.h" #include "sky/engine/platform/text/NonCJKGlyphOrientation.h" #include "sky/engine/wtf/MathExtras.h" #include "sky/engine/wtf/RefPtr.h" #include namespace blink { class PLATFORM_EXPORT FontDescription { public: enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily, MonospaceFamily, CursiveFamily, FantasyFamily, PictographFamily }; enum Kerning { AutoKerning, NormalKerning, NoneKerning }; enum LigaturesState { NormalLigaturesState, DisabledLigaturesState, EnabledLigaturesState }; FontDescription() : m_locale("en") , m_specifiedSize(0) , m_computedSize(0) , m_letterSpacing(0) , m_wordSpacing(0) , m_orientation(Horizontal) , m_nonCJKGlyphOrientation(NonCJKGlyphOrientationVerticalRight) , m_widthVariant(RegularWidth) , m_style(FontStyleNormal) , m_variant(FontVariantNormal) , m_isAbsoluteSize(false) , m_weight(FontWeightNormal) , m_stretch(FontStretchNormal) , m_genericFamily(NoFamily) , m_kerning(AutoKerning) , m_commonLigaturesState(NormalLigaturesState) , m_discretionaryLigaturesState(NormalLigaturesState) , m_historicalLigaturesState(NormalLigaturesState) , m_contextualLigaturesState(NormalLigaturesState) , m_keywordSize(0) , m_fontSmoothing(AutoSmoothing) , m_textRendering(AutoTextRendering) , m_script(USCRIPT_COMMON) , m_syntheticBold(false) , m_syntheticItalic(false) , m_subpixelTextPosition(s_useSubpixelTextPositioning) , m_typesettingFeatures(s_defaultTypesettingFeatures) { } bool operator==(const FontDescription&) const; bool operator!=(const FontDescription& other) const { return !(*this == other); } struct VariantLigatures { VariantLigatures() : common(NormalLigaturesState) , discretionary(NormalLigaturesState) , historical(NormalLigaturesState) , contextual(NormalLigaturesState) { } unsigned common : 2; unsigned discretionary : 2; unsigned historical : 2; unsigned contextual : 2; }; const FontFamily& family() const { return m_familyList; } FontFamily& firstFamily() { return m_familyList; } float specifiedSize() const { return m_specifiedSize; } float computedSize() const { return m_computedSize; } FontStyle style() const { return static_cast(m_style); } int computedPixelSize() const { return int(m_computedSize + 0.5f); } FontVariant variant() const { return static_cast(m_variant); } bool isAbsoluteSize() const { return m_isAbsoluteSize; } FontWeight weight() const { return static_cast(m_weight); } FontStretch stretch() const { return static_cast(m_stretch); } static FontWeight lighterWeight(FontWeight); static FontWeight bolderWeight(FontWeight); GenericFamilyType genericFamily() const { return static_cast(m_genericFamily); } // only use fixed default size when there is only one font family, and that family is "monospace" FixedPitchFontType fixedPitchFontType() const { if (genericFamily() == MonospaceFamily && !family().next() && family().family() == FontFamilyNames::webkit_monospace) return FixedPitchFont; return NonFixedPitchFont; } Kerning kerning() const { return static_cast(m_kerning); } VariantLigatures variantLigatures() const; LigaturesState commonLigaturesState() const { return static_cast(m_commonLigaturesState); } LigaturesState discretionaryLigaturesState() const { return static_cast(m_discretionaryLigaturesState); } LigaturesState historicalLigaturesState() const { return static_cast(m_historicalLigaturesState); } LigaturesState contextualLigaturesState() const { return static_cast(m_contextualLigaturesState); } unsigned keywordSize() const { return m_keywordSize; } FontSmoothingMode fontSmoothing() const { return static_cast(m_fontSmoothing); } TextRenderingMode textRendering() const { return static_cast(m_textRendering); } UScriptCode script() const { return static_cast(m_script); } const String& locale() const { return m_locale; } bool isSyntheticBold() const { return m_syntheticBold; } bool isSyntheticItalic() const { return m_syntheticItalic; } bool useSubpixelPositioning() const { return m_subpixelTextPosition; } FontTraits traits() const; float wordSpacing() const { return m_wordSpacing; } float letterSpacing() const { return m_letterSpacing; } FontOrientation orientation() const { return static_cast(m_orientation); } NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast(m_nonCJKGlyphOrientation); } FontWidthVariant widthVariant() const { return static_cast(m_widthVariant); } FontFeatureSettings* featureSettings() const { return m_featureSettings.get(); } float effectiveFontSize() const; // Returns either the computedSize or the computedPixelSize FontCacheKey cacheKey(const FontFaceCreationParams&, FontTraits desiredTraits = FontTraits(0)) const; void setFamily(const FontFamily& family) { m_familyList = family; } void setComputedSize(float s) { m_computedSize = clampToFloat(s); } void setSpecifiedSize(float s) { m_specifiedSize = clampToFloat(s); } void setStyle(FontStyle i) { m_style = i; } void setVariant(FontVariant c) { m_variant = c; } void setVariantLigatures(const VariantLigatures&); void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; } void setWeight(FontWeight w) { m_weight = w; } void setStretch(FontStretch s) { m_stretch = s; } void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; } void setKerning(Kerning kerning) { m_kerning = kerning; updateTypesettingFeatures(); } void setKeywordSize(unsigned s) { m_keywordSize = s; } void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; } void setTextRendering(TextRenderingMode rendering) { m_textRendering = rendering; updateTypesettingFeatures(); } void setOrientation(FontOrientation orientation) { m_orientation = orientation; } void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; } void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; } void setScript(UScriptCode s) { m_script = s; } void setLocale(const String& locale) { m_locale = locale; } void setSyntheticBold(bool syntheticBold) { m_syntheticBold = syntheticBold; } void setSyntheticItalic(bool syntheticItalic) { m_syntheticItalic = syntheticItalic; } void setFeatureSettings(PassRefPtr settings) { m_featureSettings = settings; } void setTraits(FontTraits); void setWordSpacing(float s) { m_wordSpacing = s; } void setLetterSpacing(float s) { m_letterSpacing = s; } TypesettingFeatures typesettingFeatures() const { return static_cast(m_typesettingFeatures); } static void setSubpixelPositioning(bool b) { s_useSubpixelTextPositioning = b; } static bool subpixelPositioning() { return s_useSubpixelTextPositioning; } static void setDefaultTypesettingFeatures(TypesettingFeatures); static TypesettingFeatures defaultTypesettingFeatures(); private: FontFamily m_familyList; // The list of font families to be used. RefPtr m_featureSettings; String m_locale; void updateTypesettingFeatures() const; float m_specifiedSize; // Specified CSS value. Independent of rendering issues such as integer // rounding, minimum font sizes. float m_computedSize; // Computed size adjusted for the minimum font size. float m_letterSpacing; float m_wordSpacing; unsigned m_orientation : 1; // FontOrientation - Whether the font is rendering on a horizontal line or a vertical line. unsigned m_nonCJKGlyphOrientation : 1; // NonCJKGlyphOrientation - Only used by vertical text. Determines the default orientation for non-ideograph glyphs. unsigned m_widthVariant : 2; // FontWidthVariant unsigned m_style : 1; // FontStyle unsigned m_variant : 1; // FontVariant unsigned m_isAbsoluteSize : 1; // Whether or not CSS specified an explicit size // (logical sizes like "medium" don't count). unsigned m_weight : 4; // FontWeight unsigned m_stretch : 4; // FontStretch unsigned m_genericFamily : 3; // GenericFamilyType unsigned m_kerning : 2; // Kerning unsigned m_commonLigaturesState : 2; unsigned m_discretionaryLigaturesState : 2; unsigned m_historicalLigaturesState : 2; unsigned m_contextualLigaturesState : 2; unsigned m_keywordSize : 4; // We cache whether or not a font is currently represented by a CSS keyword (e.g., medium). If so, // then we can accurately translate across different generic families to adjust for different preference settings // (e.g., 13px monospace vs. 16px everything else). Sizes are 1-8 (like the HTML size values for ). unsigned m_fontSmoothing : 2; // FontSmoothingMode unsigned m_textRendering : 2; // TextRenderingMode unsigned m_script : 7; // Used to help choose an appropriate font for generic font families. unsigned m_syntheticBold : 1; unsigned m_syntheticItalic : 1; unsigned m_subpixelTextPosition : 1; mutable unsigned m_typesettingFeatures : 2; // TypesettingFeatures static TypesettingFeatures s_defaultTypesettingFeatures; static bool s_useSubpixelTextPositioning; }; inline bool FontDescription::operator==(const FontDescription& other) const { return m_familyList == other.m_familyList && m_specifiedSize == other.m_specifiedSize && m_computedSize == other.m_computedSize && m_letterSpacing == other.m_letterSpacing && m_wordSpacing == other.m_wordSpacing && m_style == other.m_style && m_variant == other.m_variant && m_isAbsoluteSize == other.m_isAbsoluteSize && m_weight == other.m_weight && m_stretch == other.m_stretch && m_genericFamily == other.m_genericFamily && m_kerning == other.m_kerning && m_commonLigaturesState == other.m_commonLigaturesState && m_discretionaryLigaturesState == other.m_discretionaryLigaturesState && m_historicalLigaturesState == other.m_historicalLigaturesState && m_contextualLigaturesState == other.m_contextualLigaturesState && m_keywordSize == other.m_keywordSize && m_fontSmoothing == other.m_fontSmoothing && m_textRendering == other.m_textRendering && m_orientation == other.m_orientation && m_nonCJKGlyphOrientation == other.m_nonCJKGlyphOrientation && m_widthVariant == other.m_widthVariant && m_script == other.m_script && m_syntheticBold == other.m_syntheticBold && m_syntheticItalic == other.m_syntheticItalic && m_featureSettings == other.m_featureSettings && m_subpixelTextPosition == other.m_subpixelTextPosition; } } // namespace blink #endif // SKY_ENGINE_PLATFORM_FONTS_FONTDESCRIPTION_H_