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  1: <?php
  2: /**
  3:  * This file contains the the pager class.
  4:  *
  5:  * @package Core
  6:  * @subpackage GUI
  7:  * @version SVN Revision $Rev:$
  8:  *
  9:  * @author Timo Hummel
 10:  * @copyright four for business AG <www.4fb.de>
 11:  * @license http://www.contenido.org/license/LIZENZ.txt
 12:  * @link http://www.4fb.de
 13:  * @link http://www.contenido.org
 14:  */
 15: 
 16: defined('CON_FRAMEWORK') || die('Illegal call: Missing framework initialization - request aborted.');
 17: 
 18: /**
 19:  * cPager
 20:  * Basic pager class without presentation logic
 21:  *
 22:  * @package Core
 23:  * @subpackage GUI
 24:  */
 25: class cPager {
 26: 
 27:     /**
 28:      * Amount of items
 29:      *
 30:      * @var int
 31:      */
 32:     private $_items;
 33: 
 34:     /**
 35:      * Item padding (before and after the current item)
 36:      *
 37:      * @var int
 38:      */
 39:     private $_itemPadding;
 40: 
 41:     /**
 42:      * Items on the left side
 43:      *
 44:      * @var int
 45:      */
 46:     private $_previousItems;
 47: 
 48:     /**
 49:      * Items on the right side
 50:      *
 51:      * @var int
 52:      */
 53:     private $_nextItems;
 54: 
 55:     /**
 56:      * Current page
 57:      *
 58:      * @var int
 59:      */
 60:     private $_currentPage;
 61: 
 62:     /**
 63:      * Items per page
 64:      *
 65:      * @var int
 66:      */
 67:     private $_itemsPerPage;
 68: 
 69:     /**
 70:      * Constructor Function
 71:      * Initializes the pager
 72:      *
 73:      * @param int $items Amount of items
 74:      * @param int $itemsPerPage Items displayed per page
 75:      * @param int $currentPage Defines the current page
 76:      */
 77:     public function __construct($items, $itemsPerPage, $currentPage) {
 78:         $this->_items = $items;
 79:         $this->_itemsPerPage = $itemsPerPage;
 80:         $this->_currentPage = $currentPage;
 81: 
 82:         // Default values.
 83:         $this->_itemPadding = 2;
 84:         $this->_previousItems = 2;
 85:         $this->_nextItems = 2;
 86:     }
 87: 
 88:     /**
 89:      * Returns the current page
 90:      *
 91:      * @return int
 92:      */
 93:     public function getCurrentPage() {
 94:         return $this->_currentPage;
 95:     }
 96: 
 97:     /**
 98:      * Returns if the currentPage pointer is the first page.
 99:      *
100:      * @return boolean True if we're on the first page.
101:      */
102:     public function isFirstPage() {
103:         if ($this->_currentPage == 1) {
104:             return true;
105:         }
106: 
107:         return false;
108:     }
109: 
110:     /**
111:      * Returns if the currentPage pointer is the last page.
112:      *
113:      * @return boolean True if we're on the last page.
114:      */
115:     public function isLastPage() {
116:         if ($this->_currentPage == $this->getMaxPages()) {
117:             return true;
118:         }
119: 
120:         return false;
121:     }
122: 
123:     /**
124:      * Returns the amount of pages.
125:      *
126:      * @return int Page count
127:      */
128:     public function getMaxPages() {
129:         if ($this->_items == 0) {
130:             return 1;
131:         } else if ($this->_itemsPerPage == 0) {
132:             return 1;
133:         } else {
134:             return (ceil($this->_items / $this->_itemsPerPage));
135:         }
136:     }
137: 
138:     /**
139:      * Returns an array with the pager structure.
140:      *
141:      * Array format:
142:      * Key : Page Number
143:      * Value: | for "...", "current" for the current item, page number otherwise
144:      *
145:      * @return array Pager structure
146:      */
147:     public function getPagesInRange() {
148:         $items = array();
149: 
150:         $maxPages = $this->getMaxPages();
151: 
152:         if (($this->_itemPadding * 3) + $this->_previousItems + $this->_nextItems > $maxPages) {
153:             // Disable item padding
154:             for ($i = 1; $i < $this->getMaxPages() + 1; $i++) {
155:                 $items[$i] = $i;
156:             }
157:         } else {
158:             for ($i = 1; $i < $this->_previousItems + 1; $i++) {
159:                 if ($i <= $maxPages && $i >= 1) {
160:                     $items[$i] = $i;
161:                 }
162: 
163:                 if ($i + 1 <= $maxPages && $i >= 2) {
164:                     $items[$i + 1] = "|";
165:                 }
166:             }
167: 
168:             for ($i = $this->_currentPage - $this->_itemPadding; $i < $this->_currentPage + $this->_itemPadding + 1; $i++) {
169:                 if ($i <= $maxPages && $i >= 1) {
170:                     $items[$i] = $i;
171:                 }
172: 
173:                 if ($i + 1 <= $maxPages && $i >= 2) {
174:                     $items[$i + 1] = "|";
175:                 }
176:             }
177: 
178:             for ($i = ($this->getMaxPages() - $this->_nextItems) + 1; $i < $this->getMaxPages() + 1; $i++) {
179:                 if ($i <= $maxPages && $i >= 2) {
180:                     $items[$i] = $i;
181:                 }
182:             }
183:         }
184: 
185:         $items[$this->_currentPage] = 'current';
186: 
187:         return ($items);
188:     }
189: }
CMS CONTENIDO 4.9.7 API documentation generated by ApiGen