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Some dimensions would always serialize in a canonical unit, others never did, and others we manually would do so in their StyleValue. This commit moves all of that into the dimension types, which means for example that Length can apply its special rounding. Our local serialization test now produces the same output as other browsers. :^)
68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
/*
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* Copyright (c) 2022-2025, Sam Atkins <sam@ladybird.org>
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* Copyright (c) 2024, Glenn Skrzypczak <glenn.skrzypczak@gmail.com>
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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/Resolution.h>
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namespace Web::CSS {
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Resolution::Resolution(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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Resolution Resolution::make_dots_per_pixel(double value)
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{
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return { value, Type::Dppx };
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}
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String Resolution::to_string(SerializationMode serialization_mode) const
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{
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if (serialization_mode == SerializationMode::ResolvedValue)
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return MUST(String::formatted("{}dppx", to_dots_per_pixel()));
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return MUST(String::formatted("{}{}", raw_value(), unit_name()));
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}
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double Resolution::to_dots_per_pixel() const
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{
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switch (m_type) {
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case Type::Dpi:
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return m_value / 96; // 1in = 2.54cm = 96px
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case Type::Dpcm:
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return m_value / (96.0 / 2.54); // 1cm = 96px/2.54
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case Type::Dppx:
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return m_value;
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}
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VERIFY_NOT_REACHED();
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}
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StringView Resolution::unit_name() const
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{
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switch (m_type) {
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case Type::Dpi:
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return "dpi"sv;
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case Type::Dpcm:
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return "dpcm"sv;
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case Type::Dppx:
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return "dppx"sv;
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}
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VERIFY_NOT_REACHED();
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}
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Optional<Resolution::Type> Resolution::unit_from_name(StringView name)
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{
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if (name.equals_ignoring_ascii_case("dpi"sv)) {
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return Type::Dpi;
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} else if (name.equals_ignoring_ascii_case("dpcm"sv)) {
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return Type::Dpcm;
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} else if (name.equals_ignoring_ascii_case("dppx"sv) || name.equals_ignoring_ascii_case("x"sv)) {
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return Type::Dppx;
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}
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return {};
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}
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}
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