ladybird/Libraries/LibWeb/CSS/StyleValues/BackgroundSizeStyleValue.cpp
Sam Atkins 04622f3940 LibWeb/CSS: Use LengthPercentageOrAuto for background sizes
...instead of `auto` Lengths.

This also fixes interpolating between two `auto` `<bg-size>`s, which
fixes a lot of animation tests for both `background-size` and `mask`.
2025-09-04 13:31:24 +01:00

46 lines
1.7 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "BackgroundSizeStyleValue.h"
namespace Web::CSS {
BackgroundSizeStyleValue::BackgroundSizeStyleValue(LengthPercentageOrAuto size_x, LengthPercentageOrAuto size_y)
: StyleValueWithDefaultOperators(Type::BackgroundSize)
, m_properties { .size_x = move(size_x), .size_y = move(size_y) }
{
}
BackgroundSizeStyleValue::~BackgroundSizeStyleValue() = default;
String BackgroundSizeStyleValue::to_string(SerializationMode mode) const
{
if (m_properties.size_x.is_auto() && m_properties.size_y.is_auto())
return "auto"_string;
return MUST(String::formatted("{} {}", m_properties.size_x.to_string(mode), m_properties.size_y.to_string(mode)));
}
ValueComparingNonnullRefPtr<StyleValue const> BackgroundSizeStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
{
auto absolutize = [&](auto& size) -> LengthPercentageOrAuto {
if (size.is_auto())
return size;
return size.length_percentage().absolutized(viewport_rect, font_metrics, root_font_metrics);
};
auto absolutized_size_x = absolutize(m_properties.size_x);
auto absolutized_size_y = absolutize(m_properties.size_y);
if (absolutized_size_x == m_properties.size_x && absolutized_size_y == m_properties.size_y)
return *this;
return BackgroundSizeStyleValue::create(absolutized_size_x, absolutized_size_y);
}
}