<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_View

 * @subpackage Helper

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @version    $Id: Layout.php 20096 2010-01-06 02:05:09Z bkarwin $

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/** Zend_View_Helper_Abstract.php */

require_once 'Zend/View/Helper/Abstract.php';

/**

 * View helper for retrieving layout object

 *

 * @package    Zend_View

 * @subpackage Helper

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_View_Helper_Layout extends Zend_View_Helper_Abstract

{

    /** @var Zend_Layout */

    protected $_layout;

    /**

     * Get layout object

     *

     * @return Zend_Layout

     */

    public function getLayout()

    {

        if (null === $this->_layout) {

            require_once 'Zend/Layout.php';

            $this->_layout = Zend_Layout::getMvcInstance();

            if (null === $this->_layout) {

                // Implicitly creates layout object

                $this->_layout = new Zend_Layout();

            }

        }

        return $this->_layout;

    }

    /**

     * Set layout object

     *

     * @param  Zend_Layout $layout

     * @return Zend_Layout_Controller_Action_Helper_Layout

     */

    public function setLayout(Zend_Layout $layout)

    {

        $this->_layout = $layout;

        return $this;

    }

    /**

     * Return layout object

     *

     * Usage: $this->layout()->setLayout('alternate');

     *

     * @return Zend_Layout

     */

    public function layout()

    {

        return $this->getLayout();

    }

}