nodelist.php

См. документацию.

<?php
namespace Bitrix\Main\Web\DOM;
 
/*
class NodeList extends \Bitrix\Main\Type\Dictionary implements \Traversable
{
    public function item($index)
    {
        return $this->offsetGet($index);
    }
 
    public function haveItem(Node $item)
    {
        for($i = 0; $i < $this->count(); $i++)
        {
            if($item->isEqual($this->item($i)))
            {
                return true;
            }
        }
 
        return false;
    }
 
    public function removeItem(Node $item)
    {
        for($i = 0; $i < $this->count(); $i++)
        {
            if($item === $this->item($i))
            {
                $this->offsetUnset($i);
                break;
            }
        }
    }
}
*/
 
class NodeList implements \Iterator {
    protected $length = 0;
    protected $position = 0;
    protected $values = array();
 
    public function __construct(array $values = null)
    {
        if($values === null)
        {
            $this->position = 0;
            $this->set($values);
        }
    }
 
    public function getLength()
    {
        return $this->length;
    }
 
    /*
    * @return Node|null
    */
    public function item($index)
    {
        if($this->valid($index))
        {
            return $this->values[$index];
        }
 
        return null;
    }
 
    public function set(array $values)
    {
        $this->values = array_values($values);
        $this->length = count($this->values);
    }
 
    public function get()
    {
        return $this->values;
    }
 
    public function rewind()
    {
        $this->position = 0;
    }
 
    public function current()
    {
        return $this->values[$this->position];
    }
 
    public function key()
    {
        return $this->position;
    }
 
    public function next()
    {
        ++$this->position;
    }
 
    public function valid($index = null)
    {
        if($index === null)
        {
            $index = $this->position;
        }
 
        return isset($this->values[$index]);
    }
}