1: <?php
  2: /**
  3:  * XOOPS page navigation
  4:  *
  5:  * You may not change or alter any portion of this comment or credits
  6:  * of supporting developers from this source code or any supporting source code
  7:  * which is considered copyrighted (c) material of the original comment or credit authors.
  8:  * This program is distributed in the hope that it will be useful,
  9:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 11:  *
 12:  * @copyright       (c) 2000-2016 XOOPS Project (www.xoops.org)
 13:  * @license             GNU GPL 2 (http://www.gnu.org/licenses/gpl-2.0.html)
 14:  * @package             kernel
 15:  * @since               2.0.0
 16:  * @author              Kazumi Ono (http://www.myweb.ne.jp/, http://jp.xoops.org/)
 17:  */
 18: 
 19: defined('XOOPS_ROOT_PATH') || exit('Restricted access');
 20: 
 21: /**
 22:  * Class XoopsPageNav
 23:  */
 24: class XoopsPageNav
 25: {
 26:     /**
 27:      * *#@+
 28:      *
 29:      * @access private
 30:      */
 31:     public $total;
 32:     public $perpage;
 33:     public $current;
 34:     public $url;
 35:     /**
 36:      * *#@-
 37:      */
 38: 
 39:     /**
 40:      * Constructor
 41:      *
 42:      * @param int    $total_items   Total number of items
 43:      * @param int    $items_perpage Number of items per page
 44:      * @param int    $current_start First item on the current page
 45:      * @param string $start_name    Name for "start" or "offset"
 46:      * @param string $extra_arg     Additional arguments to pass in the URL
 47:      */
 48:     public function __construct($total_items, $items_perpage, $current_start, $start_name = 'start', $extra_arg = '')
 49:     {
 50:         $this->total   = (int)$total_items;
 51:         $this->perpage = (int)$items_perpage;
 52:         $this->current = (int)$current_start;
 53:         $this->extra   = $extra_arg;
 54:         if ($extra_arg != '' && (substr($extra_arg, -5) !== '&amp;' || substr($extra_arg, -1) !== '&')) {
 55:             $this->extra = '&amp;' . $extra_arg;
 56:         }
 57:         $this->url = $_SERVER['PHP_SELF'] . '?' . trim($start_name) . '=';
 58:     }
 59: 
 60:     /**
 61:      * Create text navigation
 62:      *
 63:      * @param  integer $offset
 64:      * @return string
 65:      */
 66:     public function renderNav($offset = 4)
 67:     {
 68:         $ret = '';
 69:         if ($this->total <= $this->perpage) {
 70:             return $ret;
 71:         }
 72:         if (($this->total != 0) && ($this->perpage != 0)) {
 73:             $total_pages = ceil($this->total / $this->perpage);
 74:             if ($total_pages > 1) {
 75:                 $ret .= '<div id="xo-pagenav">';
 76:                 $prev = $this->current - $this->perpage;
 77:                 if ($prev >= 0) {
 78:                     $ret .= '<a class="xo-pagarrow" href="' . $this->url . $prev . $this->extra . '"><u>&laquo;</u></a> ';
 79:                 }
 80:                 $counter      = 1;
 81:                 $current_page = (int)floor(($this->current + $this->perpage) / $this->perpage);
 82:                 while ($counter <= $total_pages) {
 83:                     if ($counter == $current_page) {
 84:                         $ret .= '<strong class="xo-pagact" >(' . $counter . ')</strong> ';
 85:                     } elseif (($counter > $current_page - $offset && $counter < $current_page + $offset) || $counter == 1 || $counter == $total_pages) {
 86:                         if ($counter == $total_pages && $current_page < $total_pages - $offset) {
 87:                             $ret .= '... ';
 88:                         }
 89:                         $ret .= '<a class="xo-counterpage" href="' . $this->url . (($counter - 1) * $this->perpage) . $this->extra . '">' . $counter . '</a> ';
 90:                         if ($counter == 1 && $current_page > 1 + $offset) {
 91:                             $ret .= '... ';
 92:                         }
 93:                     }
 94:                     ++$counter;
 95:                 }
 96:                 $next = $this->current + $this->perpage;
 97:                 if ($this->total > $next) {
 98:                     $ret .= '<a class="xo-pagarrow" href="' . $this->url . $next . $this->extra . '"><u>&raquo;</u></a> ';
 99:                 }
100:                 $ret .= '</div> ';
101:             }
102:         }
103: 
104:         return $ret;
105:     }
106: 
107:     /**
108:      * Create a navigational dropdown list
109:      *
110:      * @param  boolean $showbutton Show the "Go" button?
111:      * @return string
112:      */
113:     public function renderSelect($showbutton = false)
114:     {
115:         if ($this->total < $this->perpage) {
116:             return null;
117:         }
118:         $total_pages = ceil($this->total / $this->perpage);
119:         $ret         = '';
120:         if ($total_pages > 1) {
121:             $ret = '<form name="pagenavform">';
122:             $ret .= '<select name="pagenavselect" onchange="location=this.options[this.options.selectedIndex].value;">';
123:             $counter      = 1;
124:             $current_page = (int)floor(($this->current + $this->perpage) / $this->perpage);
125:             while ($counter <= $total_pages) {
126:                 if ($counter == $current_page) {
127:                     $ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . $this->extra . '" selected>' . $counter . '</option>';
128:                 } else {
129:                     $ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . $this->extra . '">' . $counter . '</option>';
130:                 }
131:                 ++$counter;
132:             }
133:             $ret .= '</select>';
134:             if ($showbutton) {
135:                 $ret .= '&nbsp;<input type="submit" value="' . _GO . '" />';
136:             }
137:             $ret .= '</form>';
138:         }
139: 
140:         return $ret;
141:     }
142: 
143:     /**
144:      * Create navigation with images
145:      *
146:      * @param  integer $offset
147:      * @return string
148:      */
149:     public function renderImageNav($offset = 4)
150:     {
151:         if ($this->total < $this->perpage) {
152:             return null;
153:         }
154:         $total_pages = ceil($this->total / $this->perpage);
155:         $ret         = '';
156:         if ($total_pages > 1) {
157:             $ret  = '<table><tr>';
158:             $prev = $this->current - $this->perpage;
159:             if ($prev >= 0) {
160:                 $ret .= '<td class="pagneutral"><a href="' . $this->url . $prev . $this->extra . '">&lt;</a></td><td><img src="' . XOOPS_URL . '/images/blank.gif" width="6" alt="" /></td>';
161:             } else {
162:                 $ret .= '<td class="pagno"></a></td><td><img src="' . XOOPS_URL . '/images/blank.gif" width="6" alt="" /></td>';
163:             }
164:             $counter      = 1;
165:             $current_page = (int)floor(($this->current + $this->perpage) / $this->perpage);
166:             while ($counter <= $total_pages) {
167:                 if ($counter == $current_page) {
168:                     $ret .= '<td class="pagact"><strong>' . $counter . '</strong></td>';
169:                 } elseif (($counter > $current_page - $offset && $counter < $current_page + $offset) || $counter == 1 || $counter == $total_pages) {
170:                     if ($counter == $total_pages && $current_page < $total_pages - $offset) {
171:                         $ret .= '<td class="paginact">...</td>';
172:                     }
173:                     $ret .= '<td class="paginact"><a href="' . $this->url . (($counter - 1) * $this->perpage) . $this->extra . '">' . $counter . '</a></td>';
174:                     if ($counter == 1 && $current_page > 1 + $offset) {
175:                         $ret .= '<td class="paginact">...</td>';
176:                     }
177:                 }
178:                 ++$counter;
179:             }
180:             $next = $this->current + $this->perpage;
181:             if ($this->total > $next) {
182:                 $ret .= '<td><img src="' . XOOPS_URL . '/images/blank.gif" width="6" alt="" /></td><td class="pagneutral"><a href="' . $this->url . $next . $this->extra . '">&gt;</a></td>';
183:             } else {
184:                 $ret .= '<td><img src="' . XOOPS_URL . '/images/blank.gif" width="6" alt="" /></td><td class="pagno"></td>';
185:             }
186:             $ret .= '</tr></table>';
187:         }
188: 
189:         return $ret;
190:     }
191: }
192: