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103 lines
4.3 KiB
C++
103 lines
4.3 KiB
C++
/*
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* Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
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* Copyright (c) 2025, Tim Ledbetter <tim.ledbetter@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "CSSLCHLike.h"
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#include <AK/Math.h>
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#include <AK/TypeCasts.h>
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#include <LibWeb/CSS/Serialize.h>
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#include <LibWeb/CSS/StyleValues/CalculatedStyleValue.h>
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#include <LibWeb/CSS/StyleValues/KeywordStyleValue.h>
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#include <LibWeb/CSS/StyleValues/NumberStyleValue.h>
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#include <LibWeb/CSS/StyleValues/PercentageStyleValue.h>
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namespace Web::CSS {
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bool CSSLCHLike::equals(StyleValue const& other) const
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{
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if (type() != other.type())
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return false;
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auto const& other_color = other.as_color();
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if (color_type() != other_color.color_type())
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return false;
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auto const& other_oklch_like = as<CSSLCHLike>(other_color);
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return m_properties == other_oklch_like.m_properties;
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}
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Optional<Color> CSSLCH::to_color(ColorResolutionContext color_resolution_context) const
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{
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auto raw_l_val = resolve_with_reference_value(m_properties.l, 100, color_resolution_context.calculation_resolution_context);
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auto c_val = resolve_with_reference_value(m_properties.c, 150, color_resolution_context.calculation_resolution_context);
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auto raw_h_val = resolve_hue(m_properties.h, color_resolution_context.calculation_resolution_context);
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auto alpha_val = resolve_alpha(m_properties.alpha, color_resolution_context.calculation_resolution_context);
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if (!raw_l_val.has_value() || !c_val.has_value() || !raw_h_val.has_value() || !alpha_val.has_value())
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return {};
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auto l_val = clamp(raw_l_val.value(), 0, 100);
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auto h_val = AK::to_radians(raw_h_val.value());
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return Color::from_lab(l_val, c_val.value() * cos(h_val), c_val.value() * sin(h_val), alpha_val.value());
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}
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// https://www.w3.org/TR/css-color-4/#serializing-lab-lch
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String CSSLCH::to_string(SerializationMode mode) const
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{
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StringBuilder builder;
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builder.append("lch("sv);
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serialize_color_component(builder, mode, m_properties.l, 100, 0, 100);
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builder.append(' ');
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serialize_color_component(builder, mode, m_properties.c, 150, 0, 230);
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builder.append(' ');
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serialize_hue_component(builder, mode, m_properties.h);
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if ((!m_properties.alpha->is_number() || m_properties.alpha->as_number().number() < 1)
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&& (!m_properties.alpha->is_percentage() || m_properties.alpha->as_percentage().percentage().as_fraction() < 1)) {
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builder.append(" / "sv);
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serialize_alpha_component(builder, mode, m_properties.alpha);
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}
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builder.append(')');
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return MUST(builder.to_string());
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}
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Optional<Color> CSSOKLCH::to_color(ColorResolutionContext color_resolution_context) const
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{
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auto raw_l_val = resolve_with_reference_value(m_properties.l, 1.0, color_resolution_context.calculation_resolution_context);
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auto raw_c_val = resolve_with_reference_value(m_properties.c, 0.4, color_resolution_context.calculation_resolution_context);
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auto raw_h_val = resolve_hue(m_properties.h, color_resolution_context.calculation_resolution_context);
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auto alpha_val = resolve_alpha(m_properties.alpha, color_resolution_context.calculation_resolution_context);
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if (!raw_l_val.has_value() || !raw_c_val.has_value() || !raw_h_val.has_value() || !alpha_val.has_value())
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return {};
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auto l_val = clamp(raw_l_val.value(), 0, 1);
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auto c_val = max(raw_c_val.value(), 0);
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auto h_val = AK::to_radians(raw_h_val.value());
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return Color::from_oklab(l_val, c_val * cos(h_val), c_val * sin(h_val), alpha_val.value());
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}
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// https://www.w3.org/TR/css-color-4/#serializing-oklab-oklch
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String CSSOKLCH::to_string(SerializationMode mode) const
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{
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StringBuilder builder;
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builder.append("oklch("sv);
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serialize_color_component(builder, mode, m_properties.l, 1.0f, 0, 1);
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builder.append(' ');
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serialize_color_component(builder, mode, m_properties.c, 0.4f, 0, 2.3);
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builder.append(' ');
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serialize_hue_component(builder, mode, m_properties.h);
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if ((!m_properties.alpha->is_number() || m_properties.alpha->as_number().number() < 1)
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&& (!m_properties.alpha->is_percentage() || m_properties.alpha->as_percentage().percentage().as_fraction() < 1)) {
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builder.append(" / "sv);
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serialize_alpha_component(builder, mode, m_properties.alpha);
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}
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builder.append(')');
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return MUST(builder.to_string());
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}
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}
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