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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

jimport('joomla.html.html');
jimport('joomla.form.formfield');

/**
 * Form Field class for the Joomla Platform.
 * Supports a generic list of options.
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormFieldList extends JFormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	protected $type = 'List';

/**
	 * Method to get the field input markup for a generic list.
	 * Use the multiple attribue to enable multiselect.
	 *
	 * @return  string  The field input markup.
	 * @since   11.1
	 */
	protected function getInput()
	{
		// Initialize variables.
		$html = array();
		$attr = '';

// Initialize some field attributes.
		$attr .= $this->element['class'] ? ' class="'.(string) $this->element['class'].'"' : '';

// To avoid user's confusion, readonly="true" should imply disabled="true".
		if ( (string) $this->element['readonly'] == 'true' || (string) $this->element['disabled'] == 'true') {
			$attr .= ' disabled="disabled"';
		}

$attr .= $this->element['size'] ? ' size="'.(int) $this->element['size'].'"' : '';
		$attr .= $this->multiple ? ' multiple="multiple"' : '';

// Initialize JavaScript field attributes.
		$attr .= $this->element['onchange'] ? ' onchange="'.(string) $this->element['onchange'].'"' : '';

// Get the field options.
		$options = (array) $this->getOptions();

// Create a read-only list (no name) with a hidden input to store the value.
		if ((string) $this->element['readonly'] == 'true') {
			$html[] = JHtml::_('select.genericlist', $options, '', trim($attr), 'value', 'text', $this->value, $this->id);
			$html[] = '<input type="hidden" name="'.$this->name.'" value="'.$this->value.'"/>';
		}
		// Create a regular list.
		else {
			$html[] = JHtml::_('select.genericlist', $options, $this->name, trim($attr), 'value', 'text', $this->value, $this->id);
		}

return implode($html);
	}

/**
	 * Method to get the field options.
	 *
	 * @return  array  The field option objects.
	 * @since   11.1
	 */
	protected function getOptions()
	{
		// Initialize variables.
		$options = array();

foreach ($this->element->children() as $option) {

// Only add <option /> elements.
			if ($option->getName() != 'option') {
				continue;
			}

// Create a new option object based on the <option /> element.
			$tmp = JHtml::_('select.option', (string) $option['value'], JText::alt(trim((string) $option), preg_replace('/[^a-zA-Z0-9_\-]/', '_', $this->fieldname)), 'value', 'text', ((string) $option['disabled']=='true'));

// Set some option attributes.
			$tmp->class = (string) $option['class'];

// Set some JavaScript option attributes.
			$tmp->onclick = (string) $option['onclick'];

// Add the option object to the result set.
			$options[] = $tmp;
		}

reset($options);

return $options;
	}
}