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dompdf/src/Frame/FrameListIterator.php
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<?php
namespace Dompdf\Frame;
use Iterator;
use Dompdf\Frame;
/**
* Linked-list Iterator
*
* Returns children in order and allows for list to change during iteration,
* provided the changes occur to or after the current element
*
* @access private
* @package dompdf
*/
class FrameListIterator implements Iterator
{
/**
* @var Frame
*/
protected $_parent;
/**
* @var Frame
*/
protected $_cur;
/**
* @var int
*/
protected $_num;
/**
* @param Frame $frame
*/
public function __construct(Frame $frame)
{
$this->_parent = $frame;
$this->_cur = $frame->get_first_child();
$this->_num = 0;
}
/**
*
*/
public function rewind()
{
$this->_cur = $this->_parent->get_first_child();
$this->_num = 0;
}
/**
* @return bool
*/
public function valid()
{
return isset($this->_cur); // && ($this->_cur->get_prev_sibling() === $this->_prev);
}
/**
* @return int
*/
public function key()
{
return $this->_num;
}
/**
* @return Frame
*/
public function current()
{
return $this->_cur;
}
/**
* @return Frame
*/
public function next()
{
$ret = $this->_cur;
if (!$ret) {
return null;
}
$this->_cur = $this->_cur->get_next_sibling();
$this->_num++;
return $ret;
}
}
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