<?php
/**
* This file contains the CssParserCombinatorUserDefined 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\combinator;
use \Closure;
use \DOMElement;
use com\soloproyectos\common\css\parser\exception\CssParserException;
use com\soloproyectos\common\css\parser\combinator\CssParserCombinator;
/**
* Class CssParserCombinatorUserDefined.
*
* This class represents a filter 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 CssParserCombinatorUserDefined extends CssParserCombinator
{
/**
* User defined function.
* @var Closure
*/
private $_userDefFunction;
/**
* Constructor.
*
* @param Closure $userDefFunction User defined function
*
* @return void
*/
public function __construct($userDefFunction)
{
$this->_userDefFunction = $userDefFunction;
}
/**
* Gets the child nodes.
*
* @param DOMElement $node DOMElement object
* @param string $tagname Tag name
*
* @return array of DOMElements
*/
public function filter($node, $tagname)
{
$userDefFunction = $this->_userDefFunction;
$nodes = $userDefFunction($node, $tagname);
if (!is_array($nodes)) {
throw new CssParserException(
"The user defined combinator is not an array"
);
}
// excludes the items that are not elements
$items = array();
foreach ($nodes as $node) {
if ($node instanceof DOMElement) {
array_push($items, $node);
}
}
return $items;
}
}
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