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Pagination.php @ 850

Last change on this file since 850 was 345, checked in by quyenla, 11 years ago
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File size: 9.4 KB

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1	<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
2	/**
3	* CodeIgniter
4	*
5	* An open source application development framework for PHP 5.1.6 or newer
6	*
7	* @package CodeIgniter
8	* @author ExpressionEngine Dev Team
9	* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
10	* @license http://codeigniter.com/user_guide/license.html
11	* @link http://codeigniter.com
12	* @since Version 1.0
13	* @filesource
14	*/
15
16	// ------------------------------------------------------------------------
17
18	/**
19	* Pagination Class
20	*
21	* @package CodeIgniter
22	* @subpackage Libraries
23	* @category Pagination
24	* @author ExpressionEngine Dev Team
25	* @link http://codeigniter.com/user_guide/libraries/pagination.html
26	*/
27	class CI_Pagination {
28
29	var $base_url = ''; // The page we are linking to
30	var $prefix = ''; // A custom prefix added to the path.
31	var $suffix = ''; // A custom suffix added to the path.
32
33	var $total_rows = 0; // Total number of items (database results)
34	var $per_page = 10; // Max number of items you want shown per page
35	var $num_links = 2; // Number of "digit" links to show before/after the currently viewed page
36	var $cur_page = 0; // The current page being viewed
37	var $current_page = 0;
38	var $use_page_numbers = FALSE; // Use page number for segment instead of offset
39	var $first_link = '&lsaquo; First';
40	var $next_link = '>';
41	var $prev_link = '<';
42	var $last_link = 'Last &rsaquo;';
43	var $uri_segment = 3;
44	var $full_tag_open = '';
45	var $full_tag_close = '';
46	var $first_tag_open = '';
47	var $first_tag_close = ' ';
48	var $last_tag_open = ' ';
49	var $last_tag_close = '';
50	var $first_url = ''; // Alternative URL for the First Page.
51	var $cur_tag_open = ' <strong>';
52	var $cur_tag_close = '</strong>';
53	var $next_tag_open = ' ';
54	var $next_tag_close = ' ';
55	var $prev_tag_open = ' ';
56	var $prev_tag_close = '';
57	var $num_tag_open = ' ';
58	var $num_tag_close = '';
59	var $page_query_string = FALSE;
60	var $query_string_segment = 'per_page';
61	var $display_pages = TRUE;
62	var $ajax_class = '';
63	var $anchor_class = '';
64
65	/**
66	* Constructor
67	*
68	* @access public
69	* @param array initialization parameters
70	*/
71	public function __construct($params = array())
72	{
73	if (count($params) > 0)
74	{
75	$this->initialize($params);
76	}
77
78	if ($this->anchor_class != '')
79	{
80	$this->anchor_class = 'class="'.$this->anchor_class.'" ';
81	}
82
83	log_message('debug', "Pagination Class Initialized");
84	}
85
86	// --------------------------------------------------------------------
87
88	/**
89	* Initialize Preferences
90	*
91	* @access public
92	* @param array initialization parameters
93	* @return void
94	*/
95	function initialize($params = array())
96	{
97	if (count($params) > 0)
98	{
99	foreach ($params as $key => $val)
100	{
101	if (isset($this->$key))
102	{
103	$this->$key = $val;
104
105	}
106	}
107	}
108	}
109
110	// --------------------------------------------------------------------
111
112	/**
113	* Generate the pagination links
114	*
115	* @access public
116	* @return string
117	*/
118	function create_links()
119	{
120	// If our item count or per-page total is zero there is no need to continue.
121	if ($this->total_rows == 0 OR $this->per_page == 0)
122	{
123	return '';
124	}
125
126	// Calculate the total number of pages
127	$num_pages = ceil($this->total_rows / $this->per_page);
128
129	// Is there only one page? Hm... nothing more to do here then.
130	if ($num_pages == 1)
131	{
132	return '';
133	}
134
135	// Set the base page index for starting page number
136	if ($this->use_page_numbers)
137	{
138	$base_page = 1;
139	}
140	else
141	{
142	$base_page = 0;
143	}
144
145	// Determine the current page number.
146	$CI =& get_instance();
147
148	if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
149	{
150	if ($CI->input->get($this->query_string_segment) != $base_page)
151	{
152	$this->cur_page = $CI->input->get($this->query_string_segment);
153
154	// Prep the current page - no funny business!
155	$this->cur_page = (int) $this->cur_page;
156	}
157	}
158	else
159	{
160	if ($CI->uri->segment($this->uri_segment) != $base_page)
161	{
162	$this->cur_page = $CI->uri->segment($this->uri_segment);
163
164	// Prep the current page - no funny business!
165	$this->cur_page = (int) $this->cur_page;
166	}
167
168
169	if ($this->current_page)
170	{
171	// Prep the current page - no funny business!
172	$this->cur_page = (int) $this->current_page;
173	}
174	}
175
176	// Set current page to 1 if using page numbers instead of offset
177	if ($this->use_page_numbers AND $this->cur_page == 0)
178	{
179	$this->cur_page = $base_page;
180	}
181
182	$this->num_links = (int)$this->num_links;
183
184	if ($this->num_links < 1)
185	{
186	show_error('Your number of links must be a positive number.');
187	}
188
189	if ( ! is_numeric($this->cur_page))
190	{
191	$this->cur_page = $base_page;
192	}
193
194	// Is the page number beyond the result range?
195	// If so we show the last page
196	if ($this->use_page_numbers)
197	{
198	if ($this->cur_page > $num_pages)
199	{
200	$this->cur_page = $num_pages;
201	}
202	}
203	else
204	{
205	if ($this->cur_page > $this->total_rows)
206	{
207	$this->cur_page = ($num_pages - 1) * $this->per_page;
208	}
209	}
210
211	$uri_page_number = $this->cur_page;
212
213	if ( ! $this->use_page_numbers)
214	{
215	$this->cur_page = floor(($this->cur_page/$this->per_page) + 1);
216	}
217
218	// Calculate the start and end numbers. These determine
219	// which number to start and end the digit links with
220	$start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;
221	$end = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;
222
223	// Is pagination being used over GET or POST? If get, add a per_page query
224	// string. If post, add a trailing slash to the base URL if needed
225	if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
226	{
227	$this->base_url = rtrim($this->base_url).'&'.$this->query_string_segment.'=';
228	}
229	else
230	{
231	$this->base_url = rtrim($this->base_url, '/') .'/';
232	}
233
234	// And here we go...
235	$output = '';
236
237	// Render the "First" link
238	if ($this->first_link !== FALSE AND $this->cur_page > ($this->num_links + 1))
239	{
240	$first_url = ($this->first_url == '') ? $this->base_url : $this->first_url;
241	$output .= $this->first_tag_open.'<a class ="'.$this->ajax_class.'"'.$this->anchor_class.'href="'.$first_url.'">'.$this->first_link.'</a>'.$this->first_tag_close;
242	}
243
244	// Render the "previous" link
245	if ($this->prev_link !== FALSE AND $this->cur_page != 1)
246	{
247	if ($this->use_page_numbers)
248	{
249	$i = $uri_page_number - 1;
250	}
251	else
252	{
253	$i = $uri_page_number - $this->per_page;
254	}
255
256	if ($i == 0 && $this->first_url != '')
257	{
258	$output .= $this->prev_tag_open.'<a class ="'.$this->ajax_class.'"'.$this->anchor_class.'href="'.$this->first_url.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
259	}
260	else
261	{
262	$i = ($i == 0) ? '' : $this->prefix.$i.$this->suffix;
263	$output .= $this->prev_tag_open.'<a class ="'.$this->ajax_class.'"'.$this->anchor_class.'href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
264	}
265
266	}
267
268	// Render the pages
269	if ($this->display_pages !== FALSE)
270	{
271	// Write the digit links
272	for ($loop = $start -1; $loop <= $end; $loop++)
273	{
274	if ($this->use_page_numbers)
275	{
276	$i = $loop;
277	}
278	else
279	{
280	$i = ($loop * $this->per_page) - $this->per_page;
281	}
282
283	if ($i >= $base_page)
284	{
285	if ($this->cur_page == $loop)
286	{
287	$output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
288	}
289	else
290	{
291	$n = ($i == $base_page) ? '' : $i;
292
293	if ($n == '' && $this->first_url != '')
294	{
295	$output .= $this->num_tag_open.'<a class ="'.$this->ajax_class.'"'.$this->anchor_class.'href="'.$this->first_url.'">'.$loop.'</a>'.$this->num_tag_close;
296	}
297	else
298	{
299	$n = ($n == '') ? '' : $this->prefix.$n.$this->suffix;
300
301	$output .= $this->num_tag_open.'<a class ="'.$this->ajax_class.'"'.$this->anchor_class.'href="'.$this->base_url.$n.'">'.$loop.'</a>'.$this->num_tag_close;
302	}
303	}
304	}
305	}
306	}
307
308
309	if ($this->next_link !== FALSE AND $this->cur_page < $num_pages)
310	{
311	if ($this->use_page_numbers)
312	{
313	$i = $this->cur_page + 1;
314	}
315	else
316	{
317	$i = ($this->cur_page * $this->per_page);
318	}
319
320	$output .= $this->next_tag_open.'<a class ="'.$this->ajax_class.'"'.$this->anchor_class.'href="'.$this->base_url.$this->prefix.$i.$this->suffix.'">'.$this->next_link.'</a>'.$this->next_tag_close;
321	}
322
323	// Render the "Last" link
324	if ($this->last_link !== FALSE AND ($this->cur_page + $this->num_links) < $num_pages)
325	{
326	if ($this->use_page_numbers)
327	{
328	$i = $num_pages;
329	}
330	else
331	{
332	$i = (($num_pages * $this->per_page) - $this->per_page);
333	}
334	$output .= $this->last_tag_open.'<a class ="'.$this->ajax_class.'"'.$this->anchor_class.'href="'.$this->base_url.$this->prefix.$i.$this->suffix.'">'.$this->last_link.'</a>'.$this->last_tag_close;
335	}
336
337	// Kill double slashes. Note: Sometimes we can end up with a double slash
338	// in the penultimate link so we'll kill all double slashes.
339	$output = preg_replace("#([^:])//+#", "\\1/", $output);
340
341	// Add the wrapper HTML if exists
342	$output = $this->full_tag_open.$output.$this->full_tag_close;
343	return $output;
344	}
345	}
346	// END Pagination Class
347
348	/* End of file Pagination.php */
349	/* Location: ./system/libraries/Pagination.php */

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source: pro-violet-viettel/sourcecode/system/libraries/Pagination.php @ 850

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