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This method takes a `TimeStyleValue`, `PercentageStyleValue` or fully-simplified `CalculatedStyleValue` with a numeric type of time, as well as a percentage basis and produces the equivalent `Time` value. This saves us having to reimplement this logic in multiple places
93 lines
2.8 KiB
C++
93 lines
2.8 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 "Time.h"
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#include <LibWeb/CSS/Percentage.h>
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#include <LibWeb/CSS/StyleValues/CalculatedStyleValue.h>
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#include <LibWeb/CSS/StyleValues/PercentageStyleValue.h>
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#include <LibWeb/CSS/StyleValues/TimeStyleValue.h>
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namespace Web::CSS {
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Time::Time(double value, TimeUnit 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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Time Time::from_style_value(NonnullRefPtr<StyleValue const> const& style_value, Optional<Time> percentage_basis)
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{
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if (style_value->is_time())
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return style_value->as_time().time();
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if (style_value->is_calculated()) {
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CalculationResolutionContext::PercentageBasis resolved_percentage_basis;
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if (percentage_basis.has_value()) {
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resolved_percentage_basis = percentage_basis.value();
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}
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return style_value->as_calculated().resolve_time({ .percentage_basis = resolved_percentage_basis }).value();
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}
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if (style_value->is_percentage()) {
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VERIFY(percentage_basis.has_value());
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return percentage_basis.value().percentage_of(style_value->as_percentage().percentage());
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}
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VERIFY_NOT_REACHED();
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}
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Time Time::make_seconds(double value)
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{
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return { value, TimeUnit::S };
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}
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Time Time::percentage_of(Percentage const& percentage) const
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{
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return Time { percentage.as_fraction() * m_value, m_unit };
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}
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String Time::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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// -> <time>
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// The time in seconds serialized as per <number> followed by the literal string "s".
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// AD-HOC: WPT expects us to serialize using the actual unit, like for other dimensions.
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// https://github.com/w3c/csswg-drafts/issues/12616
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if (serialization_mode == SerializationMode::ResolvedValue) {
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StringBuilder builder;
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serialize_a_number(builder, to_seconds());
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builder.append("s"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 Time::to_seconds() const
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{
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return ratio_between_units(m_unit, TimeUnit::S) * m_value;
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}
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double Time::to_milliseconds() const
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{
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return ratio_between_units(m_unit, TimeUnit::Ms) * m_value;
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}
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Time Time::resolve_calculated(NonnullRefPtr<CalculatedStyleValue const> const& calculated, Layout::Node const& layout_node, Time 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_time(context).value();
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}
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}
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