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Diffstat (limited to 'gfx/src/nsFont.h')
| -rw-r--r-- | gfx/src/nsFont.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/gfx/src/nsFont.h b/gfx/src/nsFont.h new file mode 100644 index 0000000000..3e8bffa5c1 --- /dev/null +++ b/gfx/src/nsFont.h @@ -0,0 +1,128 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef nsFont_h___ +#define nsFont_h___ + +#include <cstdint> +#include "gfxFontConstants.h" // for NS_FONT_KERNING_AUTO, etc +#include "gfxFontVariations.h" +#include "mozilla/ServoStyleConsts.h" +#include "mozilla/StyleColorInlines.h" // for StyleAbsoluteColor +#include "nsTArray.h" // for nsTArray + +struct gfxFontFeature; +struct gfxFontStyle; + +// Font structure. +struct nsFont final { + typedef mozilla::FontStretch FontStretch; + typedef mozilla::FontSlantStyle FontSlantStyle; + typedef mozilla::FontWeight FontWeight; + + // List of font families, either named or generic. + mozilla::StyleFontFamily family; + + // Font features from CSS font-feature-settings + CopyableTArray<gfxFontFeature> fontFeatureSettings; + + // Font variations from CSS font-variation-settings + CopyableTArray<gfxFontVariation> fontVariationSettings; + + // The logical size of the font, in CSS Pixels + mozilla::NonNegativeLength size{0}; + + // The aspect-value (ie., the ratio actualsize:actualxheight) that any + // actual physical font created from this font structure must have when + // rendering or measuring a string. The value must be nonnegative. + mozilla::StyleFontSizeAdjust sizeAdjust = + mozilla::StyleFontSizeAdjust::None(); + + // The estimated background color behind the text. Enables a special + // rendering mode when the alpha component > 0. Only used for text in the + // chrome. + mozilla::StyleAbsoluteColor fontSmoothingBackgroundColor = + mozilla::StyleAbsoluteColor::Transparent(); + + // Language system tag, to override document language; + // this is an OpenType "language system" tag represented as a 32-bit integer + // (see http://www.microsoft.com/typography/otspec/languagetags.htm). + uint32_t languageOverride = 0; + + // Font-selection/rendering properties corresponding to CSS font-style, + // font-weight, font-stretch. These are all 16-bit types. + FontSlantStyle style = FontSlantStyle::NORMAL; + FontWeight weight = FontWeight::NORMAL; + FontStretch stretch = FontStretch::NORMAL; + + // Some font-variant-alternates property values require + // font-specific settings defined via @font-feature-values rules. + // These are resolved *after* font matching occurs. + mozilla::StyleFontVariantAlternates variantAlternates; + + // Variant subproperties + uint16_t variantLigatures = NS_FONT_VARIANT_LIGATURES_NORMAL; + uint16_t variantEastAsian = NS_FONT_VARIANT_EAST_ASIAN_NORMAL; + + uint8_t variantCaps = NS_FONT_VARIANT_CAPS_NORMAL; + uint8_t variantNumeric = NS_FONT_VARIANT_NUMERIC_NORMAL; + uint8_t variantPosition = NS_FONT_VARIANT_POSITION_NORMAL; + uint8_t variantWidth = NS_FONT_VARIANT_WIDTH_NORMAL; + StyleFontVariantEmoji variantEmoji = StyleFontVariantEmoji::Normal; + + // Smoothing - controls subpixel-antialiasing (currently OSX only) + uint8_t smoothing = NS_FONT_SMOOTHING_AUTO; + + // Kerning + uint8_t kerning = NS_FONT_KERNING_AUTO; + + // Whether automatic optical sizing should be applied to variation fonts + // that include an 'opsz' axis + uint8_t opticalSizing = NS_FONT_OPTICAL_SIZING_AUTO; + + // Synthesis setting, controls use of fake bolding/italics/small-caps + mozilla::StyleFontSynthesis synthesisWeight = + mozilla::StyleFontSynthesis::Auto; + mozilla::StyleFontSynthesis synthesisStyle = + mozilla::StyleFontSynthesis::Auto; + mozilla::StyleFontSynthesis synthesisSmallCaps = + mozilla::StyleFontSynthesis::Auto; + + // initialize the font with a fontlist + nsFont(const mozilla::StyleFontFamily&, mozilla::Length aSize); + + // initialize the font with a single generic + nsFont(mozilla::StyleGenericFontFamily, mozilla::Length aSize); + + // Make a copy of the given font + nsFont(const nsFont& aFont); + + // leave members uninitialized + nsFont() = default; + ~nsFont(); + + bool operator==(const nsFont& aOther) const { return Equals(aOther); } + + bool operator!=(const nsFont& aOther) const { return !Equals(aOther); } + + bool Equals(const nsFont& aOther) const; + + nsFont& operator=(const nsFont& aOther); + + enum class MaxDifference : uint8_t { eNone, eVisual, eLayoutAffecting }; + + MaxDifference CalcDifference(const nsFont& aOther) const; + + // Add featureSettings into style + void AddFontFeaturesToStyle(gfxFontStyle* aStyle, bool aVertical) const; + + void AddFontVariationsToStyle(gfxFontStyle* aStyle) const; +}; + +#define NS_FONT_VARIANT_NORMAL 0 +#define NS_FONT_VARIANT_SMALL_CAPS 1 + +#endif /* nsFont_h___ */ |