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0c14103025
This solves an awkward dependency cycle, where CalculatedStyleValue needs the definition of Percentage, but including that would also pull in PercentageOr, which in turn needs CalculatedStyleValue. Many places that previously included StyleValue.h no longer need to. :^)
67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
/*
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* Copyright (c) 2022, 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 "Resolution.h"
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namespace Web::CSS {
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Resolution::Resolution(int 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(float 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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ErrorOr<String> Resolution::to_string() const
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{
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return String::formatted("{}{}", m_value, unit_name());
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}
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float 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 * (96.0f / 2.54f); // 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)) {
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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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