<?php
  /**
   * @package dompdf
   * @link    http://dompdf.github.com/
   * @author  Benj Carson <benjcarson@digitaljunkies.ca>
   * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   */
  
  namespace Dompdf\Positioner;
  
  use Dompdf\FrameDecorator\AbstractFrameDecorator;
  
  /**
   * Base AbstractPositioner class
   *
   * Defines postioner interface
   *
   * @access  private
   * @package dompdf
   */
  abstract class AbstractPositioner
  {
  
      /**
       * @var \Dompdf\FrameDecorator\AbstractFrameDecorator
       */
      protected $_frame;
  
      //........................................................................
  
      function __construct(AbstractFrameDecorator $frame)
      {
          $this->_frame = $frame;
      }
  
      //........................................................................
  
      abstract function position();
  
      function move($offset_x, $offset_y, $ignore_self = false)
      {
          list($x, $y) = $this->_frame->get_position();
  
          if (!$ignore_self) {
              $this->_frame->set_position($x + $offset_x, $y + $offset_y);
          }
  
          foreach ($this->_frame->get_children() as $child) {
              $child->move($offset_x, $offset_y);
          }
      }
  }