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Filename : formbehavior.php
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<?php
/**
 * @package     Joomla.Libraries
 * @subpackage  HTML
 *
 * @copyright   Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

use Joomla\Registry\Registry;

/**
 * Utility class for form related behaviors
 *
 * @since  3.0
 */
abstract class JHtmlFormbehavior
{
	/**
	 * @var    array  Array containing information for loaded files
	 * @since  3.0
	 */
	protected static $loaded = array();

	/**
	 * Method to load the Chosen JavaScript framework and supporting CSS into the document head
	 *
	 * If debugging mode is on an uncompressed version of Chosen is included for easier debugging.
	 *
	 * @param   string  $selector  Class for Chosen elements.
	 * @param   mixed   $debug     Is debugging mode on? [optional]
	 * @param   array   $options   the possible Chosen options as name => value [optional]
	 *
	 * @return  void
	 *
	 * @since   3.0
	 */
	public static function chosen($selector = '.advancedSelect', $debug = null, $options = array())
	{
		if (isset(static::$loaded[__METHOD__][$selector]))
		{
			return;
		}

		// If no debugging value is set, use the configuration setting
		if ($debug === null)
		{
			$config = JFactory::getConfig();
			$debug  = (boolean) $config->get('debug');
		}

		// Default settings
		if (!isset($options['disable_search_threshold']))
		{
			$options['disable_search_threshold'] = 10;
		}

		// Allow searching contains space in query
		if (!isset($options['search_contains']))
		{
			$options['search_contains'] = true;
		}

		if (!isset($options['allow_single_deselect']))
		{
			$options['allow_single_deselect'] = true;
		}

		if (!isset($options['placeholder_text_multiple']))
		{
			$options['placeholder_text_multiple'] = JText::_('JGLOBAL_SELECT_SOME_OPTIONS');
		}

		if (!isset($options['placeholder_text_single']))
		{
			$options['placeholder_text_single'] = JText::_('JGLOBAL_SELECT_AN_OPTION');
		}

		if (!isset($options['no_results_text']))
		{
			$options['no_results_text'] = JText::_('JGLOBAL_SELECT_NO_RESULTS_MATCH');
		}

		$displayData = array(
			'debug'     => $debug,
			'options'  => $options,
			'selector' => $selector
		);

		JLayoutHelper::render('joomla.html.formbehavior.chosen', $displayData);

		static::$loaded[__METHOD__][$selector] = true;

		return;
	}

	/**
	 * Method to load the AJAX Chosen library
	 *
	 * If debugging mode is on an uncompressed version of AJAX Chosen is included for easier debugging.
	 *
	 * @param   Registry  $options  Options in a Registry object
	 * @param   mixed     $debug    Is debugging mode on? [optional]
	 *
	 * @return  void
	 *
	 * @since   3.0
	 */
	public static function ajaxchosen(Registry $options, $debug = null)
	{
		// Retrieve options/defaults
		$selector       = $options->get('selector', '.tagfield');
		$type           = $options->get('type', 'GET');
		$url            = $options->get('url', null);
		$dataType       = $options->get('dataType', 'json');
		$jsonTermKey    = $options->get('jsonTermKey', 'term');
		$afterTypeDelay = $options->get('afterTypeDelay', '500');
		$minTermLength  = $options->get('minTermLength', '3');

		// Ajax URL is mandatory
		if (!empty($url))
		{
			if (isset(static::$loaded[__METHOD__][$selector]))
			{
				return;
			}

			// Requires chosen to work
			static::chosen($selector, $debug);

			$displayData = array(
				'url'            => $url,
				'debug'          => $debug,
				'options'        => $options,
				'selector'       => $selector,
				'type'           => $type,
				'dataType'       => $dataType,
				'jsonTermKey'    => $jsonTermKey,
				'afterTypeDelay' => $afterTypeDelay,
				'minTermLength'  => $minTermLength
			);

			JLayoutHelper::render('joomla.html.formbehavior.ajaxchosen', $displayData);

			static::$loaded[__METHOD__][$selector] = true;
		}

		return;
	}
}