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LibWeb: Implement basic CSS random() function

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At the moment this is limited to only fixed value sharing and does not
support step values
This commit is contained in:
Callum Law 2025-11-04 13:35:17 +13:00 • committed by Sam Atkins
parent 8944130fde
commit 2a5e389f63
Notes: github-actions[bot] 2025-12-01 11:02:05 +00:00
17 changed files with 380 additions and 31 deletions
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49
Libraries/LibWeb/CSS/StyleValues/RandomValueSharingStyleValue.cpp Normal file
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/*
* Copyright (c) 2025, Callum Law <callumlaw1709@outlook.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "RandomValueSharingStyleValue.h"
#include <LibWeb/CSS/StyleValues/CalculatedStyleValue.h>
#include <LibWeb/CSS/StyleValues/NumberStyleValue.h>
namespace Web::CSS {
ValueComparingNonnullRefPtr<StyleValue const> RandomValueSharingStyleValue::absolutized(ComputationContext const& computation_context) const
{
if (m_fixed_value) {
auto const& absolutized_fixed_value = m_fixed_value->absolutized(computation_context);
if (m_fixed_value == absolutized_fixed_value)
return *this;
return RandomValueSharingStyleValue::create_fixed(absolutized_fixed_value);
}
TODO();
}
double RandomValueSharingStyleValue::random_base_value() const
{
VERIFY(m_fixed_value);
VERIFY(m_fixed_value->is_number() || (m_fixed_value->is_calculated() && m_fixed_value->as_calculated().resolves_to_number()));
if (m_fixed_value->is_number())
return m_fixed_value->as_number().number();
if (m_fixed_value->is_calculated())
return m_fixed_value->as_calculated().resolve_number({}).value();
VERIFY_NOT_REACHED();
}
String RandomValueSharingStyleValue::to_string(SerializationMode serialization_mode) const
{
if (m_fixed_value)
return MUST(String::formatted("fixed {}", m_fixed_value->to_string(serialization_mode)));
TODO();
}
}