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Pass the requested font weight and slope to generic_font_name() and use them to select the most suitable font family. Families that have the exact requested weight are strongly preferred, followed by families with more style variety. This ensures that when CSS requests bold text with a generic font family like `serif`, we select a family that actually supports bold weights rather than one that only has regular weight. Co-authored-by: Jelle Raaijmakers <jelle@ladybird.org>
78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/FlyString.h>
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#include <AK/HashMap.h>
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#include <AK/RefPtr.h>
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#include <AK/Vector.h>
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#include <LibGfx/Font/FontDatabase.h>
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#include <LibGfx/Font/FontVariationSettings.h>
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#include <LibGfx/ShapeFeature.h>
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#include <LibWeb/Export.h>
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namespace Web::Platform {
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enum class GenericFont {
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Cursive,
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Fantasy,
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Monospace,
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SansSerif,
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Serif,
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UiMonospace,
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UiRounded,
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UiSansSerif,
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UiSerif,
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__Count,
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};
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struct GenericFontKey {
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GenericFont generic_font;
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int weight;
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int slope;
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bool operator==(GenericFontKey const&) const = default;
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};
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class WEB_API FontPlugin {
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public:
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FontPlugin(bool is_layout_test_mode, Gfx::SystemFontProvider* = nullptr);
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~FontPlugin();
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static FontPlugin& the();
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static void install(FontPlugin&);
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RefPtr<Gfx::Font> default_font(float point_size, Optional<Gfx::FontVariationSettings> const& font_variation_settings = {}, Optional<Gfx::ShapeFeatures> const& shape_features = {});
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Gfx::Font& default_fixed_width_font();
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FlyString generic_font_name(GenericFont, int weight, int slope);
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Vector<FlyString> symbol_font_names();
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bool is_layout_test_mode() const { return m_is_layout_test_mode; }
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void update_generic_fonts();
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private:
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FlyString compute_generic_font_name(GenericFont, int weight, int slope);
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Vector<Vector<FlyString>> m_generic_font_fallbacks;
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HashMap<GenericFontKey, FlyString> m_generic_font_cache;
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Vector<FlyString> m_symbol_font_names;
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RefPtr<Gfx::Font> m_default_fixed_width_font;
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bool m_is_layout_test_mode { false };
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};
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}
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template<>
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struct AK::Traits<Web::Platform::GenericFontKey> : public AK::DefaultTraits<Web::Platform::GenericFontKey> {
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static unsigned hash(Web::Platform::GenericFontKey const& key)
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{
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return pair_int_hash(pair_int_hash(to_underlying(key.generic_font), key.weight), key.slope);
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}
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};
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