language.php

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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

JFormHelper::loadFieldClass('list');

/**
 * Form Field class for the Joomla Platform.
 * Supports a list of installed application languages
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @see         JFormFieldContentLanguage for a select list of content languages.
 * @since       11.1
 */
class JFormFieldLanguage extends JFormFieldList
{
        /**
         * The form field type.
         *
         * @var    string
         * @since  11.1
         */
        protected $type = 'Language';

        /**
         * Method to get the field options.
         *
         * @return  array  The field option objects.
         *
         * @since   11.1
         */
        protected function getOptions()
        {
                // Initialize some field attributes.
                $client = (string) $this->element['client'];

                if ($client != 'site' && $client != 'administrator')
                {
                        $client = 'site';
                }

                // Merge any additional options in the XML definition.
                $options = array_merge(
                        parent::getOptions(),
                        JLanguageHelper::createLanguageList($this->value, constant('JPATH_' . strtoupper($client)), true, true)
                );

                // Set the default value active language
                if ($langParams = JComponentHelper::getParams('com_languages'))
                {
                        switch ((string) $this->value)
                        {
                                case 'site':
                                case 'frontend':
                                case '0':
                                        $this->value = $langParams->get('site', 'en-GB');
                                        break;
                                case 'admin':
                                case 'administrator':
                                case 'backend':
                                case '1':
                                        $this->value = $langParams->get('administrator', 'en-GB');
                                        break;
                                case 'active':
                                case 'auto':
                                        $lang = JFactory::getLanguage();
                                        $this->value = $lang->getTag();
                                        break;
                                default:
                                break;
                        }
                }

                return $options;
        }
}