<?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_Adminhtml
 * @copyright   Copyright (c) 2013 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Adminhtml block for showing product options fieldsets
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author    Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_Catalog_Product_Composite_Fieldset extends Mage_Core_Block_Text_List
{
    /**
     *
     * Iterates through fieldsets and fetches complete html
     *
     * @return string
     */
    protected function _toHtml()
    {
        $children = $this->getSortedChildren();
        $total = count($children);
        $i = 0;
        $this->setText('');
        foreach ($children as $name) {
            $block = $this->getLayout()->getBlock($name);
            if (!$block) {
                Mage::throwException(Mage::helper('core')->__('Invalid block: %s', $name));
            }

            $i++;
            $block->setIsLastFieldset($i == $total);

            $this->addText($block->toHtml());
        }

        return parent::_toHtml();
    }
}
