1 <?php

     2 /**

     3  * Zend Framework

     4  *

     5  * LICENSE

     6  *

     7  * This source file is subject to the new BSD license that is bundled

     8  * with this package in the file LICENSE.txt.

     9  * It is also available through the world-wide-web at this URL:

    10  * http://framework.zend.com/license/new-bsd

    11  * If you did not receive a copy of the license and are unable to

    12  * obtain it through the world-wide-web, please send an email

    13  * to license@zend.com so we can send you a copy immediately.

    14  *

    15  * @category   Zend

    16  * @package    Zend_Paginator

    17  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

    18  * @license    http://framework.zend.com/license/new-bsd     New BSD License

    19  * @version    $Id: Sliding.php 20096 2010-01-06 02:05:09Z bkarwin $

    20  */

    21 

    22 /**

    23  * @see Zend_Paginator_ScrollingStyle_Interface

    24  */

    25 require_once 'Zend/Paginator/ScrollingStyle/Interface.php';

    26 

    27 /**

    28  * A Yahoo! Search-like scrolling style.  The cursor will advance to

    29  * the middle of the range, then remain there until the user reaches

    30  * the end of the page set, at which point it will continue on to

    31  * the end of the range and the last page in the set.

    32  *

    33  * @link       http://search.yahoo.com/search?p=Zend+Framework

    34  * @category   Zend

    35  * @package    Zend_Paginator

    36  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

    37  * @license    http://framework.zend.com/license/new-bsd     New BSD License

    38  */

    39 class Zend_Paginator_ScrollingStyle_Sliding implements Zend_Paginator_ScrollingStyle_Interface

    40 {

    41     /**

    42      * Returns an array of "local" pages given a page number and range.

    43      *

    44      * @param  Zend_Paginator $paginator

    45      * @param  integer $pageRange (Optional) Page range

    46      * @return array

    47      */

    48     public function getPages(Zend_Paginator $paginator, $pageRange = null)

    49     {

    50         if ($pageRange === null) {

    51             $pageRange = $paginator->getPageRange();

    52         }

    53 

    54         $pageNumber = $paginator->getCurrentPageNumber();

    55         $pageCount  = count($paginator);

    56 

    57         if ($pageRange > $pageCount) {

    58             $pageRange = $pageCount;

    59         }

    60 

    61         $delta = ceil($pageRange / 2);

    62 

    63         if ($pageNumber - $delta > $pageCount - $pageRange) {

    64             $lowerBound = $pageCount - $pageRange + 1;

    65             $upperBound = $pageCount;

    66         } else {

    67             if ($pageNumber - $delta < 0) {

    68                 $delta = $pageNumber;

    69             }

    70 

    71             $offset     = $pageNumber - $delta;

    72             $lowerBound = $offset + 1;

    73             $upperBound = $offset + $pageRange;

    74         }

    75 

    76         return $paginator->getPagesInRange($lowerBound, $upperBound);

    77     }

    78 }