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<?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);
        }
    }
}