<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * 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@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Core
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Immediate flush block. To be used only as root
 *
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Core_Block_Flush extends Mage_Core_Block_Abstract
{

    protected function _toHtml()
    {
        if (!$this->_beforeToHtml()) {
            return '';
        }

        ob_implicit_flush();

        foreach ($this->getSortedChildren() as $name) {
            $block = $this->getLayout()->getBlock($name);
            if (!$block) {
                Mage::exception(Mage::helper('core')->__('Invalid block: %s', $name));
            }
            echo $block->toHtml();
        }
    }

}