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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\CssSelector\Node;
/**
* Represents a node specificity.
*
* This component is a port of the Python cssselect library,
* which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
*
* @see http://www.w3.org/TR/selectors/#specificity
*
* @author Jean-François Simon <[email protected]>
*
* @internal
*/
class Specificity
{
public const A_FACTOR = 100;
public const B_FACTOR = 10;
public const C_FACTOR = 1;
private $a;
private $b;
private $c;
public function __construct(int $a, int $b, int $c)
{
$this->a = $a;
$this->b = $b;
$this->c = $c;
}
public function plus(self $specificity): self
{
return new self($this->a + $specificity->a, $this->b + $specificity->b, $this->c + $specificity->c);
}
public function getValue(): int
{
return $this->a * self::A_FACTOR + $this->b * self::B_FACTOR + $this->c * self::C_FACTOR;
}
/**
* Returns -1 if the object specificity is lower than the argument,
* 0 if they are equal, and 1 if the argument is lower.
*/
public function compareTo(self $specificity): int
{
if ($this->a !== $specificity->a) {
return $this->a > $specificity->a ? 1 : -1;
}
if ($this->b !== $specificity->b) {
return $this->b > $specificity->b ? 1 : -1;
}
if ($this->c !== $specificity->c) {
return $this->c > $specificity->c ? 1 : -1;
}
return 0;
}
}
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