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62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
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* Copyright (c) 2022-2025, Sam Atkins <sam@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 <LibWeb/CSS/Frequency.h>
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#include <LibWeb/CSS/Percentage.h>
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#include <LibWeb/CSS/Serialize.h>
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#include <LibWeb/CSS/StyleValues/CalculatedStyleValue.h>
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namespace Web::CSS {
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Frequency::Frequency(double value, FrequencyUnit unit)
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: m_unit(unit)
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, m_value(value)
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{
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}
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Frequency Frequency::make_hertz(double value)
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{
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return { value, FrequencyUnit::Hz };
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}
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Frequency Frequency::percentage_of(Percentage const& percentage) const
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{
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return Frequency { percentage.as_fraction() * m_value, m_unit };
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}
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String Frequency::to_string(SerializationMode serialization_mode) const
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{
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// https://drafts.csswg.org/cssom/#serialize-a-css-value
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// -> <frequency>
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// The <number> component serialized as per <number> followed by the unit in its canonical form as defined in its
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// respective specification.
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if (serialization_mode == SerializationMode::ResolvedValue) {
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StringBuilder builder;
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serialize_a_number(builder, to_hertz());
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builder.append("hz"sv);
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return builder.to_string_without_validation();
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}
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StringBuilder builder;
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serialize_a_number(builder, raw_value());
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builder.append(unit_name());
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return builder.to_string_without_validation();
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}
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double Frequency::to_hertz() const
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{
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return ratio_between_units(m_unit, FrequencyUnit::Hz) * m_value;
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}
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Frequency Frequency::resolve_calculated(NonnullRefPtr<CalculatedStyleValue const> const& calculated, Layout::Node const& layout_node, Frequency const& reference_value)
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{
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CalculationResolutionContext context {
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.percentage_basis = reference_value,
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.length_resolution_context = Length::ResolutionContext::for_layout_node(layout_node),
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};
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return calculated->resolve_frequency(context).value();
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}
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}
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