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   1  <?php
   2  // $Id: pagenav.php 2 2005-11-02 18:23:29Z skalpa $

   3  //  ------------------------------------------------------------------------ //

   4  //                XOOPS - PHP Content Management System                      //

   5  //                    Copyright (c) 2000 XOOPS.org                           //

   6  //                       <http://www.xoops.org/>                             //

   7  //  ------------------------------------------------------------------------ //

   8  //  This program is free software; you can redistribute it and/or modify     //

   9  //  it under the terms of the GNU General Public License as published by     //

  10  //  the Free Software Foundation; either version 2 of the License, or        //

  11  //  (at your option) any later version.                                      //

  12  //                                                                           //

  13  //  You may not change or alter any portion of this comment or credits       //

  14  //  of supporting developers from this source code or any supporting         //

  15  //  source code which is considered copyrighted (c) material of the          //

  16  //  original comment or credit authors.                                      //

  17  //                                                                           //

  18  //  This program is distributed in the hope that it will be useful,          //

  19  //  but WITHOUT ANY WARRANTY; without even the implied warranty of           //

  20  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            //

  21  //  GNU General Public License for more details.                             //

  22  //                                                                           //

  23  //  You should have received a copy of the GNU General Public License        //

  24  //  along with this program; if not, write to the Free Software              //

  25  //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA //

  26  //  ------------------------------------------------------------------------ //

  27  // Author: Kazumi Ono (AKA onokazu)                                          //

  28  // URL: http://www.myweb.ne.jp/, http://www.xoops.org/, http://jp.xoops.org/ //

  29  // Project: The XOOPS Project                                                //

  30  // ------------------------------------------------------------------------- //

  31  
  32  /**

  33   * Class to facilitate navigation in a multi page document/list

  34   *

  35   * @package        kernel

  36   * @subpackage    util

  37   *

  38   * @author        Kazumi Ono     <onokazu@xoops.org>

  39   * @copyright    (c) 2000-2003 The Xoops Project - www.xoops.org

  40   */
  41  class XoopsPageNav
  42  {
  43      /**#@+

  44       * @access    private

  45       */
  46      var $total;
  47      var $perpage;
  48      var $current;
  49      var $url;
  50      /**#@-*/

  51  
  52      /**

  53       * Constructor

  54       *

  55       * @param   int     $total_items    Total number of items

  56       * @param   int     $items_perpage  Number of items per page

  57       * @param   int     $current_start  First item on the current page

  58       * @param   string  $start_name     Name for "start" or "offset"

  59       * @param   string  $extra_arg      Additional arguments to pass in the URL

  60       **/
  61  	function XoopsPageNav($total_items, $items_perpage, $current_start, $start_name="start", $extra_arg="")
  62      {
  63          $this->total = intval($total_items);
  64          $this->perpage = intval($items_perpage);
  65          $this->current = intval($current_start);
  66          if ( $extra_arg != '' && ( substr($extra_arg, -5) != '&amp;' || substr($extra_arg, -1) != '&' ) ) {
  67              $extra_arg .= '&amp;';
  68          }
  69          $this->url = $_SERVER['PHP_SELF'].'?'.$extra_arg.trim($start_name).'=';
  70      }
  71  
  72      /**

  73       * Create text navigation

  74       *

  75       * @param   integer $offset

  76       * @return  string

  77       **/
  78  	function renderNav($offset = 4)
  79      {
  80          $ret = '';
  81          if ( $this->total <= $this->perpage ) {
  82              return $ret;
  83          }
  84          $total_pages = ceil($this->total / $this->perpage);
  85          if ( $total_pages > 1 ) {
  86              $prev = $this->current - $this->perpage;
  87              if ( $prev >= 0 ) {
  88                  $ret .= '<a href="'.$this->url.$prev.'"><u>&laquo;</u></a> ';
  89              }
  90              $counter = 1;
  91              $current_page = intval(floor(($this->current + $this->perpage) / $this->perpage));
  92              while ( $counter <= $total_pages ) {
  93                  if ( $counter == $current_page ) {
  94                      $ret .= '<b>('.$counter.')</b> ';
  95                  } elseif ( ($counter > $current_page-$offset && $counter < $current_page + $offset ) || $counter == 1 || $counter == $total_pages ) {
  96                      if ( $counter == $total_pages && $current_page < $total_pages - $offset ) {
  97                          $ret .= '... ';
  98                      }
  99                      $ret .= '<a href="'.$this->url.(($counter - 1) * $this->perpage).'">'.$counter.'</a> ';
 100                      if ( $counter == 1 && $current_page > 1 + $offset ) {
 101                          $ret .= '... ';
 102                      }
 103                  }
 104                  $counter++;
 105              }
 106              $next = $this->current + $this->perpage;
 107              if ( $this->total > $next ) {
 108                  $ret .= '<a href="'.$this->url.$next.'"><u>&raquo;</u></a> ';
 109              }
 110          }
 111          return $ret;
 112      }
 113  
 114      /**

 115       * Create a navigational dropdown list

 116       *

 117       * @param   boolean     $showbutton Show the "Go" button?

 118       * @return  string

 119       **/
 120  	function renderSelect($showbutton = false)
 121      {
 122          if ( $this->total < $this->perpage ) {
 123              return;
 124          }
 125          $total_pages = ceil($this->total / $this->perpage);
 126          $ret = '';
 127          if ( $total_pages > 1 ) {
 128                 $ret = '<form name="pagenavform">';
 129              $ret .= '<select name="pagenavselect" onchange="location=this.options[this.options.selectedIndex].value;">';
 130              $counter = 1;
 131              $current_page = intval(floor(($this->current + $this->perpage) / $this->perpage));
 132              while ( $counter <= $total_pages ) {
 133                  if ( $counter == $current_page ) {
 134                      $ret .= '<option value="'.$this->url.(($counter - 1) * $this->perpage).'" selected="selected">'.$counter.'</option>';
 135                  } else {
 136                      $ret .= '<option value="'.$this->url.(($counter - 1) * $this->perpage).'">'.$counter.'</option>';
 137                  }
 138                  $counter++;
 139              }
 140              $ret .= '</select>';
 141              if ($showbutton) {
 142                  $ret .= '&nbsp;<input type="submit" value="'._GO.'" />';
 143              }
 144              $ret .= '</form>';
 145          }
 146          return $ret;
 147      }
 148  
 149      /**

 150       * Create navigation with images

 151       *

 152       * @param   integer     $offset

 153       * @return  string

 154       **/
 155  	function renderImageNav($offset = 4)
 156      {
 157          if ( $this->total < $this->perpage ) {
 158              return;
 159          }
 160          $total_pages = ceil($this->total / $this->perpage);
 161          $ret = '';
 162          if ( $total_pages > 1 ) {
 163                 $ret = '<table><tr>';
 164              $prev = $this->current - $this->perpage;
 165              if ( $prev >= 0 ) {
 166                  $ret .= '<td class="pagneutral"><a href="'.$this->url.$prev.'">&lt;</a></td><td><img src="'.XOOPS_URL.'/images/blank.gif" width="6" alt="" /></td>';
 167              }
 168              $counter = 1;
 169              $current_page = intval(floor(($this->current + $this->perpage) / $this->perpage));
 170              while ( $counter <= $total_pages ) {
 171                  if ( $counter == $current_page ) {
 172                      $ret .= '<td class="pagact"><b>'.$counter.'</b></td>';
 173                  } elseif ( ($counter > $current_page-$offset && $counter < $current_page + $offset ) || $counter == 1 || $counter == $total_pages ) {
 174                      if ( $counter == $total_pages && $current_page < $total_pages - $offset ) {
 175                          $ret .= '<td class="paginact">...</td>';
 176                      }
 177                      $ret .= '<td class="paginact"><a href="'.$this->url.(($counter - 1) * $this->perpage).'">'.$counter.'</a></td>';
 178                      if ( $counter == 1 && $current_page > 1 + $offset ) {
 179                          $ret .= '<td class="paginact">...</td>';
 180                      }
 181                  }
 182                  $counter++;
 183              }
 184              $next = $this->current + $this->perpage;
 185              if ( $this->total > $next ) {
 186                  $ret .= '<td><img src="'.XOOPS_URL.'/images/blank.gif" width="6" alt="" /></td><td class="pagneutral"><a href="'.$this->url.$next.'">&gt;</a></td>';
 187              }
 188              $ret .= '</tr></table>';
 189          }
 190          return $ret;
 191      }
 192  }
 193  
 194  ?>