<?php

namespace Sabberworm\CSS\Property;

/**

<  * Class representing a single CSS selector. Selectors have to be split by the comma prior to being passed into this class.



>  * Class representing a single CSS selector. Selectors have to be split by the comma prior to being passed into this
>  * class.
>  */
> class Selector
> {
>     /**
>      * regexp for specificity calculations
>      *
>      * @var string


 */

< class Selector {
< 
< 	//Regexes for specificity calculations


	const NON_ID_ATTRIBUTES_AND_PSEUDO_CLASSES_RX = '/
	(\.[\w]+)                   # classes
	|
	\[(\w+)                     # attributes
	|
	(\:(                        # pseudo classes
		link|visited|active
		|hover|focus
		|lang
		|target
		|enabled|disabled|checked|indeterminate
		|root
		|nth-child|nth-last-child|nth-of-type|nth-last-of-type
		|first-child|last-child|first-of-type|last-of-type
		|only-child|only-of-type
		|empty|contains
	))
	/ix';


>     /**
	const ELEMENTS_AND_PSEUDO_ELEMENTS_RX = '/
>      * regexp for specificity calculations
	((^|[\s\+\>\~]+)[\w]+   # elements
>      *
	|
>      * @var string
	\:{1,2}(                # pseudo-elements
>      */


		after|before|first-letter|first-line|selection
	))
	/ix';


>     /**
	private $sSelector;
>      * regexp for specificity calculations
	private $iSpecificity;
>      *

>      * @var string
	public function __construct($sSelector, $bCalculateSpecificity = false) {
>      */
		$this->setSelector($sSelector);
>     const SELECTOR_VALIDATION_RX = '/
		if ($bCalculateSpecificity) {
>         ^(
			$this->getSpecificity();
>             (?:
		}
>                 [a-zA-Z0-9\x{00A0}-\x{FFFF}_^$|*="\'~\[\]()\-\s\.:#+>]* # any sequence of valid unescaped characters
	}
>                 (?:\\\\.)?                                              # a single escaped character

>                 (?:([\'"]).*?(?<!\\\\)\2)?                              # a quoted text like [id="example"]
	public function getSelector() {
>             )*
		return $this->sSelector;
>         )$
	}
>         /ux';

> 
	public function setSelector($sSelector) {
>     /**
		$this->sSelector = trim($sSelector);
>      * @var string
		$this->iSpecificity = null;
>      */


	}

> 

>     /**
	public function __toString() {
>      * @var int|null
		return $this->getSelector();
>      */



< 	public function __construct($sSelector, $bCalculateSpecificity = false) {



>     /**
>      * @param string $sSelector
>      *
>      * @return bool
>      */
>     public static function isValid($sSelector)
>     {
>         return preg_match(static::SELECTOR_VALIDATION_RX, $sSelector);
>     }
> 
>     /**
>      * @param string $sSelector
>      * @param bool $bCalculateSpecificity
>      */
>     public function __construct($sSelector, $bCalculateSpecificity = false)
>     {



< 	public function getSelector() {



>     /**
>      * @return string
>      */
>     public function getSelector()
>     {



< 	public function setSelector($sSelector) {



>     /**
>      * @param string $sSelector
>      *
>      * @return void
>      */
>     public function setSelector($sSelector)
>     {



< 	public function __toString() {



>     /**
>      * @return string
>      */
>     public function __toString()
>     {



< 	public function getSpecificity() {



>     /**
>      * @return int
>      */
>     public function getSpecificity()
>     {


			/// @todo should exclude \# as well as "#"
			$aMatches = null;
			$b = substr_count($this->sSelector, '#');
			$c = preg_match_all(self::NON_ID_ATTRIBUTES_AND_PSEUDO_CLASSES_RX, $this->sSelector, $aMatches);
			$d = preg_match_all(self::ELEMENTS_AND_PSEUDO_ELEMENTS_RX, $this->sSelector, $aMatches);
			$this->iSpecificity = ($a * 1000) + ($b * 100) + ($c * 10) + $d;
		}
		return $this->iSpecificity;
	}

< 


}