25 lines
1.5 KiB
PHP
25 lines
1.5 KiB
PHP
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<?php
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namespace Sabberworm\CSS\Property; class Selector { const NON_ID_ATTRIBUTES_AND_PSEUDO_CLASSES_RX = '/
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(\.[\w]+) # classes
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\[(\w+) # attributes
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(\:( # pseudo classes
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link|visited|active
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|hover|focus
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|lang
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|target
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|enabled|disabled|checked|indeterminate
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|root
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|nth-child|nth-last-child|nth-of-type|nth-last-of-type
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|first-child|last-child|first-of-type|last-of-type
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|only-child|only-of-type
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|empty|contains
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))
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/ix'; const ELEMENTS_AND_PSEUDO_ELEMENTS_RX = '/
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((^|[\s\+\>\~]+)[\w]+ # elements
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\:{1,2}( # pseudo-elements
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after|before|first-letter|first-line|selection
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))
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/ix'; private $sSelector; private $iSpecificity; public function __construct($sSelector, $bCalculateSpecificity = false) { $this->setSelector($sSelector); if ($bCalculateSpecificity) { $this->getSpecificity(); } } public function getSelector() { return $this->sSelector; } public function setSelector($sSelector) { $this->sSelector = trim($sSelector); $this->iSpecificity = null; } public function __toString() { return $this->getSelector(); } public function getSpecificity() { if ($this->iSpecificity === null) { $a = 0; $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; } }
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