mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-04-25 14:05:15 +00:00
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
|
|
* Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "CSSRGB.h"
|
|
#include <AK/TypeCasts.h>
|
|
#include <LibWeb/CSS/Serialize.h>
|
|
#include <LibWeb/CSS/StyleValues/CSSKeywordValue.h>
|
|
#include <LibWeb/CSS/StyleValues/CalculatedStyleValue.h>
|
|
#include <LibWeb/CSS/StyleValues/NumberStyleValue.h>
|
|
#include <LibWeb/CSS/StyleValues/PercentageStyleValue.h>
|
|
|
|
namespace Web::CSS {
|
|
|
|
Color CSSRGB::to_color(Optional<Layout::NodeWithStyle const&>) const
|
|
{
|
|
auto resolve_rgb_to_u8 = [](CSSStyleValue const& style_value) -> Optional<u8> {
|
|
// <number> | <percentage> | none
|
|
auto normalized = [](double number) {
|
|
if (isnan(number))
|
|
number = 0;
|
|
return llround(clamp(number, 0.0, 255.0));
|
|
};
|
|
|
|
if (style_value.is_number())
|
|
return normalized(style_value.as_number().number());
|
|
|
|
if (style_value.is_percentage())
|
|
return normalized(style_value.as_percentage().value() * 255 / 100);
|
|
|
|
if (style_value.is_calculated()) {
|
|
auto const& calculated = style_value.as_calculated();
|
|
CalculationResolutionContext context {};
|
|
if (calculated.resolves_to_number())
|
|
return normalized(calculated.resolve_number(context).value());
|
|
if (calculated.resolves_to_percentage())
|
|
return normalized(calculated.resolve_percentage(context).value().value() * 255 / 100);
|
|
}
|
|
|
|
if (style_value.is_keyword() && style_value.to_keyword() == Keyword::None)
|
|
return 0;
|
|
|
|
return {};
|
|
};
|
|
|
|
auto resolve_alpha_to_u8 = [](CSSStyleValue const& style_value) -> Optional<u8> {
|
|
auto alpha_0_1 = resolve_alpha(style_value);
|
|
if (alpha_0_1.has_value())
|
|
return llround(clamp(alpha_0_1.value() * 255.0f, 0.0f, 255.0f));
|
|
return {};
|
|
};
|
|
|
|
u8 const r_val = resolve_rgb_to_u8(m_properties.r).value_or(0);
|
|
u8 const g_val = resolve_rgb_to_u8(m_properties.g).value_or(0);
|
|
u8 const b_val = resolve_rgb_to_u8(m_properties.b).value_or(0);
|
|
u8 const alpha_val = resolve_alpha_to_u8(m_properties.alpha).value_or(255);
|
|
|
|
return Color(r_val, g_val, b_val, alpha_val);
|
|
}
|
|
|
|
bool CSSRGB::equals(CSSStyleValue const& other) const
|
|
{
|
|
if (type() != other.type())
|
|
return false;
|
|
auto const& other_color = other.as_color();
|
|
if (color_type() != other_color.color_type())
|
|
return false;
|
|
auto const& other_rgb = static_cast<CSSRGB const&>(other_color);
|
|
return m_properties == other_rgb.m_properties;
|
|
}
|
|
|
|
// https://www.w3.org/TR/css-color-4/#serializing-sRGB-values
|
|
String CSSRGB::to_string(SerializationMode mode) const
|
|
{
|
|
// FIXME: Do this properly, taking unresolved calculated values into account.
|
|
if (mode != SerializationMode::ResolvedValue && m_properties.name.has_value())
|
|
return m_properties.name.value().to_string().to_ascii_lowercase();
|
|
return serialize_a_srgb_value(to_color({}));
|
|
}
|
|
|
|
}
|