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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
273 lines
13 KiB
C++
273 lines
13 KiB
C++
/*
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* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
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* (C) 2000 Antti Koivisto (koivisto@kde.org)
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* (C) 2000 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
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* Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIother.m_ If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USm_
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*
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*/
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#ifndef SKY_ENGINE_PLATFORM_FONTS_FONTDESCRIPTION_H_
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#define SKY_ENGINE_PLATFORM_FONTS_FONTDESCRIPTION_H_
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#include "gen/sky/platform/FontFamilyNames.h"
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#include "sky/engine/platform/fonts/FixedPitchFontType.h"
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#include "sky/engine/platform/fonts/FontCacheKey.h"
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#include "sky/engine/platform/fonts/FontFamily.h"
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#include "sky/engine/platform/fonts/FontFeatureSettings.h"
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#include "sky/engine/platform/fonts/FontOrientation.h"
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#include "sky/engine/platform/fonts/FontSmoothingMode.h"
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#include "sky/engine/platform/fonts/FontTraits.h"
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#include "sky/engine/platform/fonts/FontWidthVariant.h"
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#include "sky/engine/platform/fonts/TextRenderingMode.h"
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#include "sky/engine/platform/fonts/TypesettingFeatures.h"
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#include "sky/engine/platform/text/NonCJKGlyphOrientation.h"
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#include "sky/engine/wtf/MathExtras.h"
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#include "sky/engine/wtf/RefPtr.h"
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#include <unicode/uscript.h>
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namespace blink {
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class PLATFORM_EXPORT FontDescription {
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public:
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enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily,
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MonospaceFamily, CursiveFamily, FantasyFamily, PictographFamily };
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enum Kerning { AutoKerning, NormalKerning, NoneKerning };
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enum LigaturesState { NormalLigaturesState, DisabledLigaturesState, EnabledLigaturesState };
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FontDescription()
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: m_locale("en")
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, m_specifiedSize(0)
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, m_computedSize(0)
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, m_letterSpacing(0)
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, m_wordSpacing(0)
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, m_orientation(Horizontal)
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, m_nonCJKGlyphOrientation(NonCJKGlyphOrientationVerticalRight)
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, m_widthVariant(RegularWidth)
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, m_style(FontStyleNormal)
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, m_variant(FontVariantNormal)
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, m_isAbsoluteSize(false)
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, m_weight(FontWeightNormal)
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, m_stretch(FontStretchNormal)
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, m_genericFamily(NoFamily)
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, m_kerning(AutoKerning)
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, m_commonLigaturesState(NormalLigaturesState)
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, m_discretionaryLigaturesState(NormalLigaturesState)
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, m_historicalLigaturesState(NormalLigaturesState)
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, m_contextualLigaturesState(NormalLigaturesState)
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, m_keywordSize(0)
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, m_fontSmoothing(AutoSmoothing)
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, m_textRendering(AutoTextRendering)
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, m_script(USCRIPT_COMMON)
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, m_syntheticBold(false)
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, m_syntheticItalic(false)
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, m_subpixelTextPosition(s_useSubpixelTextPositioning)
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, m_typesettingFeatures(s_defaultTypesettingFeatures)
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{
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}
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bool operator==(const FontDescription&) const;
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bool operator!=(const FontDescription& other) const { return !(*this == other); }
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struct VariantLigatures {
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VariantLigatures()
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: common(NormalLigaturesState)
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, discretionary(NormalLigaturesState)
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, historical(NormalLigaturesState)
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, contextual(NormalLigaturesState)
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{
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}
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unsigned common : 2;
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unsigned discretionary : 2;
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unsigned historical : 2;
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unsigned contextual : 2;
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};
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const FontFamily& family() const { return m_familyList; }
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FontFamily& firstFamily() { return m_familyList; }
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float specifiedSize() const { return m_specifiedSize; }
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float computedSize() const { return m_computedSize; }
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FontStyle style() const { return static_cast<FontStyle>(m_style); }
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int computedPixelSize() const { return int(m_computedSize + 0.5f); }
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FontVariant variant() const { return static_cast<FontVariant>(m_variant); }
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bool isAbsoluteSize() const { return m_isAbsoluteSize; }
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FontWeight weight() const { return static_cast<FontWeight>(m_weight); }
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FontStretch stretch() const { return static_cast<FontStretch>(m_stretch); }
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static FontWeight lighterWeight(FontWeight);
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static FontWeight bolderWeight(FontWeight);
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GenericFamilyType genericFamily() const { return static_cast<GenericFamilyType>(m_genericFamily); }
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// only use fixed default size when there is only one font family, and that family is "monospace"
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FixedPitchFontType fixedPitchFontType() const
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{
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if (genericFamily() == MonospaceFamily && !family().next() && family().family() == FontFamilyNames::webkit_monospace)
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return FixedPitchFont;
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return NonFixedPitchFont;
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}
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Kerning kerning() const { return static_cast<Kerning>(m_kerning); }
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VariantLigatures variantLigatures() const;
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LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); }
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LigaturesState discretionaryLigaturesState() const { return static_cast<LigaturesState>(m_discretionaryLigaturesState); }
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LigaturesState historicalLigaturesState() const { return static_cast<LigaturesState>(m_historicalLigaturesState); }
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LigaturesState contextualLigaturesState() const { return static_cast<LigaturesState>(m_contextualLigaturesState); }
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unsigned keywordSize() const { return m_keywordSize; }
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FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); }
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TextRenderingMode textRendering() const { return static_cast<TextRenderingMode>(m_textRendering); }
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UScriptCode script() const { return static_cast<UScriptCode>(m_script); }
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const String& locale() const { return m_locale; }
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bool isSyntheticBold() const { return m_syntheticBold; }
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bool isSyntheticItalic() const { return m_syntheticItalic; }
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bool useSubpixelPositioning() const { return m_subpixelTextPosition; }
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FontTraits traits() const;
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float wordSpacing() const { return m_wordSpacing; }
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float letterSpacing() const { return m_letterSpacing; }
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FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); }
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NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); }
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FontWidthVariant widthVariant() const { return static_cast<FontWidthVariant>(m_widthVariant); }
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FontFeatureSettings* featureSettings() const { return m_featureSettings.get(); }
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float effectiveFontSize() const; // Returns either the computedSize or the computedPixelSize
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FontCacheKey cacheKey(const FontFaceCreationParams&, FontTraits desiredTraits = FontTraits(0)) const;
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void setFamily(const FontFamily& family) { m_familyList = family; }
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void setComputedSize(float s) { m_computedSize = clampToFloat(s); }
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void setSpecifiedSize(float s) { m_specifiedSize = clampToFloat(s); }
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void setStyle(FontStyle i) { m_style = i; }
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void setVariant(FontVariant c) { m_variant = c; }
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void setVariantLigatures(const VariantLigatures&);
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void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; }
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void setWeight(FontWeight w) { m_weight = w; }
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void setStretch(FontStretch s) { m_stretch = s; }
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void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; }
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void setKerning(Kerning kerning) { m_kerning = kerning; updateTypesettingFeatures(); }
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void setKeywordSize(unsigned s) { m_keywordSize = s; }
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void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; }
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void setTextRendering(TextRenderingMode rendering) { m_textRendering = rendering; updateTypesettingFeatures(); }
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void setOrientation(FontOrientation orientation) { m_orientation = orientation; }
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void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; }
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void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; }
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void setScript(UScriptCode s) { m_script = s; }
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void setLocale(const String& locale) { m_locale = locale; }
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void setSyntheticBold(bool syntheticBold) { m_syntheticBold = syntheticBold; }
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void setSyntheticItalic(bool syntheticItalic) { m_syntheticItalic = syntheticItalic; }
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void setFeatureSettings(PassRefPtr<FontFeatureSettings> settings) { m_featureSettings = settings; }
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void setTraits(FontTraits);
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void setWordSpacing(float s) { m_wordSpacing = s; }
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void setLetterSpacing(float s) { m_letterSpacing = s; }
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TypesettingFeatures typesettingFeatures() const { return static_cast<TypesettingFeatures>(m_typesettingFeatures); }
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static void setSubpixelPositioning(bool b) { s_useSubpixelTextPositioning = b; }
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static bool subpixelPositioning() { return s_useSubpixelTextPositioning; }
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static void setDefaultTypesettingFeatures(TypesettingFeatures);
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static TypesettingFeatures defaultTypesettingFeatures();
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private:
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FontFamily m_familyList; // The list of font families to be used.
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RefPtr<FontFeatureSettings> m_featureSettings;
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String m_locale;
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void updateTypesettingFeatures() const;
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float m_specifiedSize; // Specified CSS value. Independent of rendering issues such as integer
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// rounding, minimum font sizes.
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float m_computedSize; // Computed size adjusted for the minimum font size.
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float m_letterSpacing;
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float m_wordSpacing;
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unsigned m_orientation : 1; // FontOrientation - Whether the font is rendering on a horizontal line or a vertical line.
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unsigned m_nonCJKGlyphOrientation : 1; // NonCJKGlyphOrientation - Only used by vertical text. Determines the default orientation for non-ideograph glyphs.
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unsigned m_widthVariant : 2; // FontWidthVariant
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unsigned m_style : 1; // FontStyle
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unsigned m_variant : 1; // FontVariant
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unsigned m_isAbsoluteSize : 1; // Whether or not CSS specified an explicit size
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// (logical sizes like "medium" don't count).
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unsigned m_weight : 4; // FontWeight
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unsigned m_stretch : 4; // FontStretch
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unsigned m_genericFamily : 3; // GenericFamilyType
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unsigned m_kerning : 2; // Kerning
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unsigned m_commonLigaturesState : 2;
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unsigned m_discretionaryLigaturesState : 2;
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unsigned m_historicalLigaturesState : 2;
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unsigned m_contextualLigaturesState : 2;
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unsigned m_keywordSize : 4; // We cache whether or not a font is currently represented by a CSS keyword (e.g., medium). If so,
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// then we can accurately translate across different generic families to adjust for different preference settings
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// (e.g., 13px monospace vs. 16px everything else). Sizes are 1-8 (like the HTML size values for <font>).
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unsigned m_fontSmoothing : 2; // FontSmoothingMode
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unsigned m_textRendering : 2; // TextRenderingMode
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unsigned m_script : 7; // Used to help choose an appropriate font for generic font families.
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unsigned m_syntheticBold : 1;
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unsigned m_syntheticItalic : 1;
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unsigned m_subpixelTextPosition : 1;
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mutable unsigned m_typesettingFeatures : 2; // TypesettingFeatures
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static TypesettingFeatures s_defaultTypesettingFeatures;
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static bool s_useSubpixelTextPositioning;
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};
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inline bool FontDescription::operator==(const FontDescription& other) const
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{
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return m_familyList == other.m_familyList
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&& m_specifiedSize == other.m_specifiedSize
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&& m_computedSize == other.m_computedSize
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&& m_letterSpacing == other.m_letterSpacing
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&& m_wordSpacing == other.m_wordSpacing
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&& m_style == other.m_style
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&& m_variant == other.m_variant
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&& m_isAbsoluteSize == other.m_isAbsoluteSize
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&& m_weight == other.m_weight
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&& m_stretch == other.m_stretch
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&& m_genericFamily == other.m_genericFamily
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&& m_kerning == other.m_kerning
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&& m_commonLigaturesState == other.m_commonLigaturesState
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&& m_discretionaryLigaturesState == other.m_discretionaryLigaturesState
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&& m_historicalLigaturesState == other.m_historicalLigaturesState
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&& m_contextualLigaturesState == other.m_contextualLigaturesState
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&& m_keywordSize == other.m_keywordSize
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&& m_fontSmoothing == other.m_fontSmoothing
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&& m_textRendering == other.m_textRendering
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&& m_orientation == other.m_orientation
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&& m_nonCJKGlyphOrientation == other.m_nonCJKGlyphOrientation
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&& m_widthVariant == other.m_widthVariant
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&& m_script == other.m_script
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&& m_syntheticBold == other.m_syntheticBold
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&& m_syntheticItalic == other.m_syntheticItalic
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&& m_featureSettings == other.m_featureSettings
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&& m_subpixelTextPosition == other.m_subpixelTextPosition;
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}
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_FONTS_FONTDESCRIPTION_H_
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