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 <?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.
  *
  * @category   Zend
  * @package    Zend_Controller
  * @subpackage Zend_Controller_Action_Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Controller_Action_Helper_ContextSwitch
  */
 // require_once 'Zend/Controller/Action/Helper/ContextSwitch.php';
 
 /**
  * Simplify AJAX context switching based on requested format
  *
  * @uses       Zend_Controller_Action_Helper_Abstract
  * @category   Zend
  * @package    Zend_Controller
  * @subpackage Zend_Controller_Action_Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Controller_Action_Helper_AjaxContext extends Zend_Controller_Action_Helper_ContextSwitch
 {
     /**
      * Controller property to utilize for context switching
      * @var string
      */
     protected $_contextKey = 'ajaxable';
 
     /**
      * Constructor
      *
      * Add HTML context
      *
      * @return void
      */
     public function __construct()
     {
         parent::__construct();
         $this->addContext('html', array('suffix' => 'ajax'));
     }
 
     /**
      * Initialize AJAX context switching
      *
      * Checks for XHR requests; if detected, attempts to perform context switch.
      *
      * @param  string $format
      * @return void
      */
     public function initContext($format = null)
     {
         $this->_currentContext = null;
 
         $request = $this->getRequest();
         if (!method_exists($request, 'isXmlHttpRequest') ||
             !$this->getRequest()->isXmlHttpRequest())
         {
             return;
         }
 
         return parent::initContext($format);
     }
 }