Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\CssSelector\Node;
Chris@0: 
Chris@0: /**
Chris@0:  * Represents a node specificity.
Chris@0:  *
Chris@0:  * This component is a port of the Python cssselect library,
Chris@0:  * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
Chris@0:  *
Chris@0:  * @see http://www.w3.org/TR/selectors/#specificity
Chris@0:  *
Chris@0:  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
Chris@0:  *
Chris@0:  * @internal
Chris@0:  */
Chris@0: class Specificity
Chris@0: {
Chris@0:     const A_FACTOR = 100;
Chris@0:     const B_FACTOR = 10;
Chris@0:     const C_FACTOR = 1;
Chris@0: 
Chris@0:     private $a;
Chris@0:     private $b;
Chris@0:     private $c;
Chris@0: 
Chris@0:     /**
Chris@0:      * @param int $a
Chris@0:      * @param int $b
Chris@0:      * @param int $c
Chris@0:      */
Chris@0:     public function __construct($a, $b, $c)
Chris@0:     {
Chris@0:         $this->a = $a;
Chris@0:         $this->b = $b;
Chris@0:         $this->c = $c;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @return self
Chris@0:      */
Chris@16:     public function plus(self $specificity)
Chris@0:     {
Chris@0:         return new self($this->a + $specificity->a, $this->b + $specificity->b, $this->c + $specificity->c);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns global specificity value.
Chris@0:      *
Chris@0:      * @return int
Chris@0:      */
Chris@0:     public function getValue()
Chris@0:     {
Chris@0:         return $this->a * self::A_FACTOR + $this->b * self::B_FACTOR + $this->c * self::C_FACTOR;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns -1 if the object specificity is lower than the argument,
Chris@0:      * 0 if they are equal, and 1 if the argument is lower.
Chris@0:      *
Chris@0:      * @return int
Chris@0:      */
Chris@16:     public function compareTo(self $specificity)
Chris@0:     {
Chris@0:         if ($this->a !== $specificity->a) {
Chris@0:             return $this->a > $specificity->a ? 1 : -1;
Chris@0:         }
Chris@0: 
Chris@0:         if ($this->b !== $specificity->b) {
Chris@0:             return $this->b > $specificity->b ? 1 : -1;
Chris@0:         }
Chris@0: 
Chris@0:         if ($this->c !== $specificity->c) {
Chris@0:             return $this->c > $specificity->c ? 1 : -1;
Chris@0:         }
Chris@0: 
Chris@0:         return 0;
Chris@0:     }
Chris@0: }