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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.
 * Provides radio button inputs
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 *
 * @link        http://www.w3.org/TR/html-markup/command.radio.html#command.radio
 */
class JFormFieldRadio extends JFormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	protected $type = 'Radio';

/**
	 * Method to get the radio button field input markup.
	 *
	 * @return  string  The field input markup.
	 *
	 * @since   11.1
	 */
	protected function getInput()
	{
		// Initialize variables.
		$html = array();

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

// Start the radio field output.
		$html[] = '<fieldset id="'.$this->id.'"'.$class.'>';

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

// Build the radio field output.
		foreach ($options as $i => $option) {

// Initialize some option attributes.
			$checked	= ((string) $option->value == (string) $this->value) ? ' checked="checked"' : '';
			$class		= !empty($option->class) ? ' class="'.$option->class.'"' : '';
			$disabled	= !empty($option->disable) ? ' disabled="disabled"' : '';

// Initialize some JavaScript option attributes.
			$onclick	= !empty($option->onclick) ? ' onclick="'.$option->onclick.'"' : '';

$html[] = '<input type="radio" id="'.$this->id.$i.'" name="'.$this->name.'"' .
					' value="'.htmlspecialchars($option->value, ENT_COMPAT, 'UTF-8').'"'
					.$checked.$class.$onclick.$disabled.'/>';

$html[] = '<label for="'.$this->id.$i.'"'.$class.'>'.JText::alt($option->text, preg_replace('/[^a-zA-Z0-9_\-]/', '_', $this->fieldname)).'</label>';
		}

// End the radio field output.
		$html[] = '</fieldset>';

return implode($html);
	}

/**
	 * Method to get the field options for radio buttons.
	 *
	 * @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'], trim((string) $option), '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;
	}
}