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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; } }