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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\Visitor\SelectorVisitor;
/**
* An attribute selector.
*
* This selects for elements with the given attribute, and optionally with a
* value matching certain conditions as well.
*/
final class AttributeSelector extends SimpleSelector
{
/**
* The name of the attribute being selected for.
*
* @var QualifiedName
* @readonly
*/
private $name;
/**
* The operator that defines the semantics of {@see value}.
*
* If this is `null`, this matches any element with the given property,
* regardless of this value. It's `null` if and only if {@see value} is `null`.
*
* @var string|null
* @phpstan-var AttributeOperator::*|null
* @readonly
*/
private $op;
/**
* An assertion about the value of {@see name}.
*
* The precise semantics of this string are defined by {@see op}.
*
* If this is `null`, this matches any element with the given property,
* regardless of this value. It's `null` if and only if {@see op} is `null`.
*
* @var string|null
* @readonly
*/
private $value;
/**
* The modifier which indicates how the attribute selector should be
* processed.
*
* See for example [case-sensitivity][] modifiers.
*
* [case-sensitivity]: https://www.w3.org/TR/selectors-4/#attribute-case
*
* If {@see op} is `null`, this is always `null` as well.
*
* @var string|null
* @readonly
*/
private $modifier;
/**
* Creates an attribute selector that matches any element with a property of
* the given name.
*/
public static function create(QualifiedName $name): AttributeSelector
{
return new AttributeSelector($name, null, null, null);
}
/**
* Creates an attribute selector that matches an element with a property
* named $name, whose value matches $value based on the semantics of $op.
*
* @phpstan-param AttributeOperator::*|null $op
*/
public static function withOperator(QualifiedName $name, ?string $op, ?string $value, ?string $modifier = null): AttributeSelector
{
return new AttributeSelector($name, $op, $value, $modifier);
}
/**
* @phpstan-param AttributeOperator::*|null $op
*/
private function __construct(QualifiedName $name, ?string $op, ?string $value, ?string $modifier)
{
$this->name = $name;
$this->op = $op;
$this->value = $value;
$this->modifier = $modifier;
}
public function getName(): QualifiedName
{
return $this->name;
}
/**
* @phpstan-return AttributeOperator::*|null
*/
public function getOp(): ?string
{
return $this->op;
}
public function getValue(): ?string
{
return $this->value;
}
public function getModifier(): ?string
{
return $this->modifier;
}
public function accept(SelectorVisitor $visitor)
{
return $visitor->visitAttributeSelector($this);
}
public function equals(object $other): bool
{
return $other instanceof AttributeSelector &&
$other->name->equals($this->name) &&
$other->op === $this->op &&
$other->value === $this->value &&
$other->modifier === $this->modifier;
}
}
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