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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_View
  * @subpackage 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_View_Helper_Abstract
  */
 // require_once 'Zend/View/Helper/Abstract.php';
 
 /**
  * @category   Zend
  * @package    Zend_View
  * @subpackage 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
  */
 abstract class Zend_View_Helper_HtmlElement extends Zend_View_Helper_Abstract
 {
     /**
      * EOL character
      */
     const EOL = "\n";
 
     /**
      * The tag closing bracket
      *
      * @var string
      */
     protected $_closingBracket = null;
 
     /**
      * Get the tag closing bracket
      *
      * @return string
      */
     public function getClosingBracket()
     {
         if (!$this->_closingBracket) {
             if ($this->_isXhtml()) {
                 $this->_closingBracket = ' />';
             } else {
                 $this->_closingBracket = '>';
             }
         }
 
         return $this->_closingBracket;
     }
 
     /**
      * Is doctype XHTML?
      *
      * @return boolean
      */
     protected function _isXhtml()
     {
         $doctype = $this->view->doctype();
         return $doctype->isXhtml();
     }
 
     /**
      * Is doctype HTML5?
      *
      * @return boolean
      */
     protected function _isHtml5()
     {
         $doctype = $this->view->doctype();
         return $doctype->isHtml5();
     }
 
     /**
      * Is doctype strict?
      *
      * @return boolean
      */
     protected function _isStrictDoctype()
     {
         $doctype = $this->view->doctype();
         return $doctype->isStrict();
     }
     
     /**
      * Converts an associative array to a string of tag attributes.
      *
      * @access public
      *
      * @param array $attribs From this array, each key-value pair is
      * converted to an attribute name and value.
      *
      * @return string The XHTML for the attributes.
      */
     protected function _htmlAttribs($attribs)
     {
         $xhtml = '';
         foreach ((array) $attribs as $key => $val) {
             $key = $this->view->escape($key);
 
             if (('on' == substr($key, 0, 2)) || ('constraints' == $key)) {
                 // Don't escape event attributes; _do_ substitute double quotes with singles
                 if (!is_scalar($val)) {
                     // non-scalar data should be cast to JSON first
                     // require_once 'Zend/Json.php';
                     $val = Zend_Json::encode($val);
                 }
                 // Escape single quotes inside event attribute values.
                 // This will create html, where the attribute value has
                 // single quotes around it, and escaped single quotes or
                 // non-escaped double quotes inside of it
                 $val = str_replace('\'', '&#39;', $val);
             } else {
                 if (is_array($val)) {
                     $val = implode(' ', $val);
                 }
                 $val = $this->view->escape($val);
             }
 
             if ('id' == $key) {
                 $val = $this->_normalizeId($val);
             }
 
             if (strpos($val, '"') !== false) {
                 $xhtml .= " $key='$val'";
             } else {
                 $xhtml .= " $key=\"$val\"";
             }
 
         }
         return $xhtml;
     }
 
     /**
      * Normalize an ID
      *
      * @param  string $value
      * @return string
      */
     protected function _normalizeId($value)
     {
         if (strstr($value, '[')) {
             if ('[]' == substr($value, -2)) {
                 $value = substr($value, 0, strlen($value) - 2);
             }
             $value = trim($value, ']');
             $value = str_replace('][', '-', $value);
             $value = str_replace('[', '-', $value);
         }
         return $value;
     }
 }