interface/modules/zend_modules/library/Zend/Paginator/ScrollingStyle/Sliding.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\Paginator\ScrollingStyle;
  11
  12 use Zend\Paginator\Paginator;
  13
  14 /**
  15  * A Yahoo! Search-like scrolling style.  The cursor will advance to
  16  * the middle of the range, then remain there until the user reaches
  17  * the end of the page set, at which point it will continue on to
  18  * the end of the range and the last page in the set.
  19  *
  20  * @link       http://search.yahoo.com/search?p=Zend+Framework
  21  */
  22 class Sliding implements ScrollingStyleInterface
  23 {
  24     /**
  25      * Returns an array of "local" pages given a page number and range.
  26      *
  27      * @param  Paginator $paginator
  28      * @param  int $pageRange (Optional) Page range
  29      * @return array
  30      */
  31     public function getPages(Paginator $paginator, $pageRange = null)
  32     {
  33         if ($pageRange === null) {
  34             $pageRange = $paginator->getPageRange();
  35         }
  36
  37         $pageNumber = $paginator->getCurrentPageNumber();
  38         $pageCount  = count($paginator);
  39
  40         if ($pageRange > $pageCount) {
  41             $pageRange = $pageCount;
  42         }
  43
  44         $delta = ceil($pageRange / 2);
  45
  46         if ($pageNumber - $delta > $pageCount - $pageRange) {
  47             $lowerBound = $pageCount - $pageRange + 1;
  48             $upperBound = $pageCount;
  49         } else {
  50             if ($pageNumber - $delta < 0) {
  51                 $delta = $pageNumber;
  52             }
  53
  54             $offset     = $pageNumber - $delta;
  55             $lowerBound = $offset + 1;
  56             $upperBound = $offset + $pageRange;
  57         }
  58
  59         return $paginator->getPagesInRange($lowerBound, $upperBound);
  60     }
  61 }