mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-11-03 23:00:58 +00:00
124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
/*
|
||
* Copyright (c) 2025, Sam Atkins <sam@ladybird.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#include "CSSMathNegate.h"
|
||
#include <LibWeb/Bindings/CSSMathNegatePrototype.h>
|
||
#include <LibWeb/Bindings/Intrinsics.h>
|
||
#include <LibWeb/WebIDL/ExceptionOr.h>
|
||
|
||
namespace Web::CSS {
|
||
|
||
GC_DEFINE_ALLOCATOR(CSSMathNegate);
|
||
|
||
GC::Ref<CSSMathNegate> CSSMathNegate::create(JS::Realm& realm, NumericType type, GC::Ref<CSSNumericValue> values)
|
||
{
|
||
return realm.create<CSSMathNegate>(realm, move(type), move(values));
|
||
}
|
||
|
||
// https://drafts.css-houdini.org/css-typed-om-1/#dom-cssmathnegate-cssmathnegate
|
||
WebIDL::ExceptionOr<GC::Ref<CSSMathNegate>> CSSMathNegate::construct_impl(JS::Realm& realm, CSSNumberish value)
|
||
{
|
||
// The CSSMathNegate(arg) constructor must, when called, perform the following steps:
|
||
// 1. Replace arg with the result of rectifying a numberish value for arg.
|
||
auto converted_value = rectify_a_numberish_value(realm, value);
|
||
|
||
// 2. Return a new CSSMathNegate whose value internal slot is set to arg.
|
||
return CSSMathNegate::create(realm, converted_value->type(), converted_value);
|
||
}
|
||
|
||
CSSMathNegate::CSSMathNegate(JS::Realm& realm, NumericType type, GC::Ref<CSSNumericValue> values)
|
||
: CSSMathValue(realm, Bindings::CSSMathOperator::Negate, move(type))
|
||
, m_value(move(values))
|
||
{
|
||
}
|
||
|
||
CSSMathNegate::~CSSMathNegate() = default;
|
||
|
||
void CSSMathNegate::initialize(JS::Realm& realm)
|
||
{
|
||
WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSMathNegate);
|
||
Base::initialize(realm);
|
||
}
|
||
|
||
void CSSMathNegate::visit_edges(Visitor& visitor)
|
||
{
|
||
Base::visit_edges(visitor);
|
||
visitor.visit(m_value);
|
||
}
|
||
|
||
// https://drafts.css-houdini.org/css-typed-om-1/#serialize-a-cssmathvalue
|
||
String CSSMathNegate::serialize_math_value(Nested nested, Parens parens) const
|
||
{
|
||
// NB: Only steps 1 and 4 apply here.
|
||
// 1. Let s initially be the empty string.
|
||
StringBuilder s;
|
||
|
||
// 4. Otherwise, if this is a CSSMathNegate:
|
||
{
|
||
// 1. If paren-less is true, continue to the next step; otherwise, if nested is true, append "(" to s;
|
||
// otherwise, append "calc(" to s.
|
||
if (parens == Parens::With) {
|
||
if (nested == Nested::Yes) {
|
||
s.append("("sv);
|
||
} else {
|
||
s.append("calc("sv);
|
||
}
|
||
}
|
||
|
||
// 2. Append "-" to s.
|
||
s.append("-"sv);
|
||
|
||
// 3. Serialize this’s value internal slot with nested set to true, and append the result to s.
|
||
s.append(m_value->to_string({ .nested = true }));
|
||
|
||
// 4. If paren-less is false, append ")" to s,
|
||
if (parens == Parens::With)
|
||
s.append(")"sv);
|
||
|
||
// 5. Return s.
|
||
return s.to_string_without_validation();
|
||
}
|
||
}
|
||
|
||
// https://drafts.css-houdini.org/css-typed-om-1/#dom-cssmathnegate-value
|
||
GC::Ref<CSSNumericValue> CSSMathNegate::value() const
|
||
{
|
||
return m_value;
|
||
}
|
||
|
||
// https://drafts.css-houdini.org/css-typed-om-1/#equal-numeric-value
|
||
bool CSSMathNegate::is_equal_numeric_value(GC::Ref<CSSNumericValue> other) const
|
||
{
|
||
// NB: Only steps 1, 4 and 5 are relevant.
|
||
// 1. If value1 and value2 are not members of the same interface, return false.
|
||
auto* other_negate = as_if<CSSMathNegate>(*other);
|
||
if (!other_negate)
|
||
return false;
|
||
|
||
// 4. Assert: value1 and value2 are both CSSMathNegates or CSSMathInverts.
|
||
// 5. Return whether value1’s value and value2’s value are equal numeric values.
|
||
return m_value->is_equal_numeric_value(other_negate->m_value);
|
||
}
|
||
|
||
// https://drafts.css-houdini.org/css-typed-om-1/#create-a-sum-value
|
||
Optional<SumValue> CSSMathNegate::create_a_sum_value() const
|
||
{
|
||
// 1. Let values be the result of creating a sum value from this’s value internal slot.
|
||
auto values = m_value->create_a_sum_value();
|
||
|
||
// 2. If values is failure, return failure.
|
||
if (!values.has_value())
|
||
return {};
|
||
|
||
// 3. Negate the value of each item of values.
|
||
for (auto& value : *values)
|
||
value.value = -value.value;
|
||
|
||
// 4. Return values.
|
||
return values;
|
||
}
|
||
|
||
}
|