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1d71662f31
Initially I added this to the existing CalculationContext, but in reality, we have some data at parse-time and different data at resolve-time, so it made more sense to keep those separate. Instead of needing a variety of methods for resolving a Foo, depending on whether we have a Layout::Node available, or a percentage basis, or a length resolution context... put those in a CalculationResolutionContext, and just pass that one thing to these methods. This also removes the need for separate resolve_*_percentage() methods, because we can just pass the percentage basis in to the regular resolve_foo() method. This also corrects the issue that *any* calculation may need to resolve lengths, but we previously only passed a length resolution context to specific types in some situations. Now, they can all have one available, though it's up to the caller to provide it.
76 lines
1.7 KiB
C++
76 lines
1.7 KiB
C++
/*
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* Copyright (c) 2022-2023, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "Frequency.h"
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#include <LibWeb/CSS/Percentage.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, Type type)
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: m_type(type)
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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, Type::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_type };
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}
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String Frequency::to_string() const
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{
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return MUST(String::formatted("{}hz", to_hertz()));
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}
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double Frequency::to_hertz() const
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{
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switch (m_type) {
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case Type::Hz:
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return m_value;
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case Type::kHz:
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return m_value * 1000;
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}
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VERIFY_NOT_REACHED();
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}
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StringView Frequency::unit_name() const
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{
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switch (m_type) {
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case Type::Hz:
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return "hz"sv;
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case Type::kHz:
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return "khz"sv;
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}
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VERIFY_NOT_REACHED();
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}
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Optional<Frequency::Type> Frequency::unit_from_name(StringView name)
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{
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if (name.equals_ignoring_ascii_case("hz"sv)) {
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return Type::Hz;
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} else if (name.equals_ignoring_ascii_case("khz"sv)) {
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return Type::kHz;
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}
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return {};
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}
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Frequency Frequency::resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const& calculated, Layout::Node const& layout_node, Frequency const& reference_value)
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{
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return calculated->resolve_frequency(
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{
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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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.value();
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}
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}
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