<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @version    $Id: Placeholder.php 7078 2007-12-11 14:29:33Z matthew $
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_View_Helper_Placeholder_Container_Standalone */
require_once 'Zend/View/Helper/Placeholder/Container/Standalone.php';

/**
 * Helper for setting and retrieving title element for HTML head
 *
 * @uses       Zend_View_Helper_Placeholder_Container_Standalone
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */ 
class Zend_View_Helper_HeadTitle extends Zend_View_Helper_Placeholder_Container_Standalone
{
    /**
     * Registry key for placeholder
     * @var string
     */
    protected $_regKey = 'Zend_View_Helper_HeadTitle';

    /**
     * Retrieve placeholder for title element and optionally set state
     *
     * @param  string $title
     * @param  string $setType
     * @param  string $separator
     * @return Zend_View_Helper_HeadTitle
     */
    public function headTitle($title = null, $setType = Zend_View_Helper_Placeholder_Container_Abstract::APPEND)
    {
        if ($title) {
            if ($setType == Zend_View_Helper_Placeholder_Container_Abstract::SET) {
                $this->set($title);
            } elseif ($setType == Zend_View_Helper_Placeholder_Container_Abstract::PREPEND) {
                $this->prepend($title);
            } else {
                $this->append($title);
            }
        }
        
        return $this;
    }

    /**
     * Turn helper into string
     * 
     * @param  string|null $indent 
     * @return string
     */
    public function toString($indent = null)
    {
        $indent = (null !== $indent)
                ? $this->getWhitespace($indent)
                : $this->getIndent();

        $items = array();
        foreach ($this as $item) {
            $items[] = $this->_escape($item);
        }

        $separator = $this->_escape($this->getSeparator());

        return $indent . '<title>' . implode($separator, $items) . '</title>';
    }

    /**
     * Cast to string
     * 
     * @return string
     */
    public function __toString()
    {
        return $this->toString();
    }
}