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8952764267
CSS-Typed-OM has the following hierarchy:
CSSStyleValue
- CSSNumericValue
- CSSUnitValue
- CSSMathValue
- ...various math functions...
Somewhat unintuitively, numbers are also stored using CSSUnitValue with
`unit = "number"`.
There are no distinct classes for LengthStyleValue, etc in the spec, but
they're convenient for us, so they are implemented as subclasses of
CSSUnitValue, at least for now.
55 lines
1.2 KiB
C++
55 lines
1.2 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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#pragma once
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#include <AK/String.h>
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#include <LibWeb/Forward.h>
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namespace Web::CSS {
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class Resolution {
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public:
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enum class Type {
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Dpi,
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Dpcm,
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Dppx,
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};
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static Optional<Type> unit_from_name(StringView);
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Resolution(double value, Type type);
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static Resolution make_dots_per_pixel(double);
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String to_string() const;
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double to_dots_per_pixel() const;
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Type type() const { return m_type; }
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double raw_value() const { return m_value; }
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StringView unit_name() const;
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bool operator==(Resolution const& other) const
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{
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return m_type == other.m_type && m_value == other.m_value;
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}
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int operator<=>(Resolution const& other) const
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{
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auto this_dots_per_pixel = to_dots_per_pixel();
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auto other_dots_per_pixel = other.to_dots_per_pixel();
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if (this_dots_per_pixel < other_dots_per_pixel)
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return -1;
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if (this_dots_per_pixel > other_dots_per_pixel)
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return 1;
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return 0;
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}
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private:
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Type m_type;
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double m_value { 0 };
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};
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}
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