predefinedlist.php
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<?php
/**
* @package Joomla.Libraries
* @subpackage Form
*
* @copyright Copyright (C) 2005 - 2019 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 to load a list of predefined values
*
* @since 3.2
*/
abstract class JFormFieldPredefinedList extends JFormFieldList
{
/**
* 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;
/**
* 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();
// Allow to only use specific values of the predefined list
$filter = isset($this->element['filter']) ? explode(',', $this->element['filter']) : array();
foreach ($this->predefinedOptions as $value => $text)
{
if (empty($filter) || in_array($value, $filter))
{
$text = $this->translate ? JText::_($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];
}
}