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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* 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 <jeanfrancois.simon@sensiolabs.com>
*
* @internal
*/
class Specificity
{
const A_FACTOR = 100;
const B_FACTOR = 10;
const C_FACTOR = 1;
private $a;
private $b;
private $c;
/**
* @param int $a
* @param int $b
* @param int $c
*/
public function __construct($a, $b, $c)
{
$this->a = $a;
$this->b = $b;
$this->c = $c;
}
/**
* @return self
*/
public function plus(self $specificity)
{
return new self($this->a + $specificity->a, $this->b + $specificity->b, $this->c + $specificity->c);
}
/**
* Returns global specificity value.
*
* @return int
*/
public function getValue()
{
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.
*
* @return int
*/
public function compareTo(self $specificity)
{
if ($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;
}
}