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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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18
Userland/Libraries/LibWeb/CSS/StyleValues/IntegerStyleValue.h
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@ -1,16 +1,16 @@
/*
* Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2023-2024, Sam Atkins <sam@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/CSS/CSSStyleValue.h>
#include <LibWeb/CSS/StyleValues/CSSUnitValue.h>
namespace Web::CSS {
class IntegerStyleValue : public StyleValueWithDefaultOperators<IntegerStyleValue> {
class IntegerStyleValue final : public CSSUnitValue {
public:
static ValueComparingNonnullRefPtr<IntegerStyleValue> create(i64 value)
{
@ -18,14 +18,22 @@ public:
}
i64 integer() const { return m_value; }
virtual double value() const override { return m_value; }
virtual StringView unit() const override { return "number"sv; }
virtual String to_string() const override;
bool properties_equal(IntegerStyleValue const& other) const { return m_value == other.m_value; }
bool equals(CSSStyleValue const& other) const override
{
if (type() != other.type())
return false;
auto const& other_integer = other.as_integer();
return m_value == other_integer.m_value;
}
private:
explicit IntegerStyleValue(i64 value)
: StyleValueWithDefaultOperators(Type::Integer)
: CSSUnitValue(Type::Integer)
, m_value(value)
{
}