<?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) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Fieldset element renderer for custom variable form element
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_System_Variable_Form_Renderer_Fieldset_Element extends Mage_Adminhtml_Block_Widget_Form_Renderer_Fieldset_Element
{
    /**
     * Initialize block template
     */
    protected function _construct()
    {
        $this->setTemplate('system/variable/form/renderer/fieldset/element.phtml');
    }

    /**
     * Check "Use default" checkbox display availability
     *
     * @return bool
     */
    public function canDisplayUseDefault()
    {
        if ($this->getVariable()->getId()
            && $this->getVariable()->getStoreId())
        {
            return true;
        }
        return false;
    }

    /**
     * Check default value usage fact
     *
     * @return bool
     */
    public function usedDefault()
    {
        if ($this->getVariable()->getStoreValue() === null) {
            return true;
        }
        return false;
    }

    /**
     * Disable field in default value using case
     *
     * @return Mage_Adminhtml_Block_Catalog_Form_Renderer_Fieldset_Element
     */
    public function checkFieldDisable()
    {
        if ($this->canDisplayUseDefault() && $this->usedDefault()) {
            $this->getElement()->setDisabled(true);
        }
        return $this;
    }

    /**
     * Retrieve label scope
     *
     * @return string
     */
    public function getScopeLabel()
    {
        return '[STORE VIEW]';
    }

    /**
     * Retrieve element label html
     *
     * @return string
     */
    public function getElementLabelHtml()
    {
        return $this->getElement()->getLabelHtml();
    }

    /**
     * Retrieve element html
     *
     * @return string
     */
    public function getElementHtml()
    {
        return $this->getElement()->getElementHtml();
    }
}
