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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_Paginator
  * @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_Paginator_ScrollingStyle_Interface
  */
 // require_once 'Zend/Paginator/ScrollingStyle/Interface.php';
 
 /**
  * A Yahoo! Search-like scrolling style.  The cursor will advance to
  * the middle of the range, then remain there until the user reaches
  * the end of the page set, at which point it will continue on to
  * the end of the range and the last page in the set.
  *
  * @link       http://search.yahoo.com/search?p=Zend+Framework
  * @category   Zend
  * @package    Zend_Paginator
  * @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_Paginator_ScrollingStyle_Sliding implements Zend_Paginator_ScrollingStyle_Interface
 {
     /**
      * Returns an array of "local" pages given a page number and range.
      *
      * @param  Zend_Paginator $paginator
      * @param  integer $pageRange (Optional) Page range
      * @return array
      */
     public function getPages(Zend_Paginator $paginator, $pageRange = null)
     {
         if ($pageRange === null) {
             $pageRange = $paginator->getPageRange();
         }
 
         $pageNumber = $paginator->getCurrentPageNumber();
         $pageCount  = count($paginator);
 
         if ($pageRange > $pageCount) {
             $pageRange = $pageCount;
         }
 
         $delta = ceil($pageRange / 2);
 
         if ($pageNumber - $delta > $pageCount - $pageRange) {
             $lowerBound = $pageCount - $pageRange + 1;
             $upperBound = $pageCount;
         } else {
             if ($pageNumber - $delta < 0) {
                 $delta = $pageNumber;
             }
 
             $offset     = $pageNumber - $delta;
             $lowerBound = $offset + 1;
             $upperBound = $offset + $pageRange;
         }
 
         return $paginator->getPagesInRange($lowerBound, $upperBound);
     }
 }