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* @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Form\Field; \defined('JPATH_PLATFORM') or die; use Joomla\CMS\Language\Text; /** * Form Field to load a list of predefined values * * @since 3.2 */ abstract class PredefinedlistField extends ListField { /** * The form field type. * * @var string * @since 3.2 */ protected $type = 'Predefinedlist'; /** * Cached array of the category items. * * @var array * @since 3.2 */ protected static $options = array(); /** * Available predefined options * * @var array * @since 3.2 */ protected $predefinedOptions = array(); /** * Translate options labels ? * * @var boolean * @since 3.2 */ protected $translate = true; /** * Allows to use only specific values of the predefined list * * @var array * @since 4.0.0 */ protected $optionsFilter = []; /** * Method to attach a Form object to the field. * * @param \SimpleXMLElement $element The SimpleXMLElement object representing the `
` tag for the form field object. * @param mixed $value The form field value to validate. * @param string $group The field name group control value. This acts as an array container for the field. * For example if the field has name="foo" and the group value is set to "bar" then the * full field name would end up being "bar[foo]". * * @return boolean True on success. * * @see \Joomla\CMS\Form\FormField::setup() * @since 4.0.0 */ public function setup(\SimpleXMLElement $element, $value, $group = null) { $return = parent::setup($element, $value, $group); if ($return) { // Note: $this->element['optionsFilter'] is not cast to string here to allow empty string value. $this->optionsFilter = $this->element['optionsFilter'] ? explode(',', (string) $this->element['optionsFilter']) : []; } return $return; } /** * Method to get the options to populate list * * @return array The field option objects. * * @since 3.2 */ protected function getOptions() { // Hash for caching $hash = md5($this->element); $type = strtolower($this->type); if (!isset(static::$options[$type][$hash]) && !empty($this->predefinedOptions)) { static::$options[$type][$hash] = parent::getOptions(); $options = array(); foreach ($this->predefinedOptions as $value => $text) { $val = (string) $value; if (empty($this->optionsFilter) || in_array($val, $this->optionsFilter, true)) { $text = $this->translate ? Text::_($text) : $text; $options[] = (object) array( 'value' => $value, 'text' => $text, ); } } static::$options[$type][$hash] = array_merge(static::$options[$type][$hash], $options); } return static::$options[$type][$hash]; } }