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LibWeb/CSS: Introduce CSSNumericValue and CSSUnitValue type stubs

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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.
This commit is contained in:
Sam Atkins 2024-08-14 16:25:48 +01:00 • committed by Sam Atkins
commit 8952764267
Notes: github-actions[bot] 2024-08-21 09:53:21 +00:00
20 changed files with 225 additions and 107 deletions
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13
Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h
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@ -1,7 +1,7 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2021-2024, Sam Atkins <sam@ladybird.org>
* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
@ -9,25 +9,28 @@
#pragma once
#include <LibWeb/CSS/CSSStyleValue.h>
#include <LibWeb/CSS/Length.h>
#include <LibWeb/CSS/StyleValues/CSSUnitValue.h>
namespace Web::CSS {
class LengthStyleValue : public StyleValueWithDefaultOperators<LengthStyleValue> {
class LengthStyleValue final : public CSSUnitValue {
public:
static ValueComparingNonnullRefPtr<LengthStyleValue> create(Length const&);
virtual ~LengthStyleValue() override = default;
Length const& length() const { return m_length; }
virtual double value() const override { return m_length.raw_value(); }
virtual StringView unit() const override { return m_length.unit_name(); }
virtual String to_string() const override { return m_length.to_string(); }
virtual ValueComparingNonnullRefPtr<CSSStyleValue const> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
bool properties_equal(LengthStyleValue const& other) const { return m_length == other.m_length; }
bool equals(CSSStyleValue const& other) const override;
private:
explicit LengthStyleValue(Length const& length)
: StyleValueWithDefaultOperators(Type::Length)
: CSSUnitValue(Type::Length)
, m_length(length)
{
}