<?php
/**
* This file contains the CssParserModelSelector class.
*
* PHP Version 5.3
*
* @category Css
* @package CssParser
* @author Gonzalo Chumillas <gonzalo@soloproyectos.com>
* @license https://raw2.github.com/soloproyectos/php.common-libs/master/LICENSE BSD 2-Clause License
* @link https://github.com/soloproyectos/php.common-libs
*/
namespace com\soloproyectos\common\css\parser\model;
use \DOMElement;
use \DOMNode;
use com\soloproyectos\common\css\parser\model\CssParserModelFactor;
use com\soloproyectos\common\dom\DomHelper;
/**
* Class CssParserModelSelector.
*
* This class represents a term in a CSS expression.
*
* @category Css
* @package CssParser
* @author Gonzalo Chumillas <gonzalo@soloproyectos.com>
* @license https://raw2.github.com/soloproyectos/php.common-libs/master/LICENSE BSD 2-Clause License
* @link https://github.com/soloproyectos/php.common-libs
*/
class CssParserModelSelector
{
/**
* List of factors.
* @var array of CssParserModelFactor objects
*/
private $_factors = array();
/**
* Adds a factor.
*
* @param CssParserModelFactor $factor Factor object
*
* @return void
*/
public function addFactor($factor)
{
array_push($this->_factors, $factor);
}
/**
* Gets all filtered subnodes of a given node.
*
* This function filters all subnodes of a given node that satisfy all factors.
* A term is actually a list of factors, and a factor can be added by the
* 'addFactor' function.
*
* @param DOMNode $node DOMNode object
*
* @return array of DOMElement objects
*/
public function filter($node)
{
$ret = array();
$items = array($node);
foreach ($this->_factors as $factor) {
$ret = $this->_getNodesByFactor($items, $factor);
$items = $ret;
}
return $ret;
}
/**
* Gets nodes from a list by a given factor.
*
* @param array $nodes List of DOMNode objects
* @param CssParserModelFactor $factor Factor object
*
* @return array of DOMElement objects
*/
private function _getNodesByFactor($nodes, $factor)
{
$ret = array();
foreach ($nodes as $node) {
$items = $factor->filter($node);
$ret = DomHelper::mergeNodes($ret, $items);
}
return $ret;
}
}
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