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<?php
/**
* SCSSPHP
*
* @copyright 2012-2020 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://scssphp.github.io/scssphp
*/
namespace ScssPhp\ScssPhp\Ast\Selector;
use ScssPhp\ScssPhp\Util\Equatable;
/**
* A component of a {@see ComplexSelector}.
*
* This a {@see CompoundSelector} with one or more trailing {@see Combinator}s.
*
* @internal
*/
final class ComplexSelectorComponent implements Equatable
{
/**
* This component's compound selector.
*
* @var CompoundSelector
* @readonly
*/
private $selector;
/**
* This selector's combinators.
*
* If this is empty, that indicates that it has an implicit descendent
* combinator. If it's more than one element, that means it's invalid CSS;
* however, we still support this for backwards-compatibility purposes.
*
* @var list<string>
* @phpstan-var list<Combinator::*>
* @readonly
*/
private $combinators;
/**
* @param CompoundSelector $selector
* @param list<string> $combinators
*
* @phpstan-param list<Combinator::*> $combinators
*/
public function __construct(CompoundSelector $selector, array $combinators)
{
$this->selector = $selector;
$this->combinators = $combinators;
}
public function getSelector(): CompoundSelector
{
return $this->selector;
}
/**
* @return list<string>
* @phpstan-return list<Combinator::*>
*/
public function getCombinators(): array
{
return $this->combinators;
}
public function equals(object $other): bool
{
return $other instanceof ComplexSelectorComponent && $this->selector->equals($other->selector) && $this->combinators === $other->combinators;
}
/**
* Returns a copy of $this with $combinators added to the end of
* `$this->combinators`.
*
* @param list<string> $combinators
*
* @return ComplexSelectorComponent
*
* @phpstan-param list<Combinator::*> $combinators
*/
public function withAdditionalCombinators(array $combinators): ComplexSelectorComponent
{
if ($combinators === []) {
return $this;
}
return new ComplexSelectorComponent($this->selector, array_merge($this->combinators, $combinators));
}
}
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