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ci_restful/system/libraries/Pagination.php
alazhar 0e423e1115 first commit
2020-01-02 22:54:01 +07:00

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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* Pagination Class
*
* @package CodeIgniter
* @subpackage Libraries
* @category Pagination
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/libraries/pagination.html
*/
class CI_Pagination {
var $base_url = ''; // The page we are linking to
var $prefix = ''; // A custom prefix added to the path.
var $suffix = ''; // A custom suffix added to the path.
var $total_rows = 0; // Total number of items (database results)
var $per_page = 10; // Max number of items you want shown per page
var $num_links = 2; // Number of "digit" links to show before/after the currently viewed page
var $cur_page = 0; // The current page being viewed
var $use_page_numbers = FALSE; // Use page number for segment instead of offset
var $first_link = '&lsaquo; First';
var $next_link = '&gt;';
var $prev_link = '&lt;';
var $last_link = 'Last &rsaquo;';
var $uri_segment = 3;
var $full_tag_open = '';
var $full_tag_close = '';
var $first_tag_open = '';
var $first_tag_close = '&nbsp;';
var $last_tag_open = '&nbsp;';
var $last_tag_close = '';
var $first_url = ''; // Alternative URL for the First Page.
var $cur_tag_open = '&nbsp;<strong>';
var $cur_tag_close = '</strong>';
var $next_tag_open = '&nbsp;';
var $next_tag_close = '&nbsp;';
var $prev_tag_open = '&nbsp;';
var $prev_tag_close = '';
var $num_tag_open = '&nbsp;';
var $num_tag_close = '';
var $page_query_string = FALSE;
var $query_string_segment = 'per_page';
var $display_pages = TRUE;
var $anchor_class = '';
/**
* Constructor
*
* @access public
* @param array initialization parameters
*/
public function __construct($params = array())
{
if (count($params) > 0)
{
$this->initialize($params);
}
if ($this->anchor_class != '')
{
$this->anchor_class = 'class="'.$this->anchor_class.'" ';
}
log_message('debug', "Pagination Class Initialized");
}
// --------------------------------------------------------------------
/**
* Initialize Preferences
*
* @access public
* @param array initialization parameters
* @return void
*/
function initialize($params = array())
{
if (count($params) > 0)
{
foreach ($params as $key => $val)
{
if (isset($this->$key))
{
$this->$key = $val;
}
}
}
}
// --------------------------------------------------------------------
/**
* Generate the pagination links
*
* @access public
* @return string
*/
function create_links()
{
// If our item count or per-page total is zero there is no need to continue.
if ($this->total_rows == 0 OR $this->per_page == 0)
{
return '';
}
// Calculate the total number of pages
$num_pages = ceil($this->total_rows / $this->per_page);
// Is there only one page? Hm... nothing more to do here then.
if ($num_pages == 1)
{
return '';
}
// Set the base page index for starting page number
if ($this->use_page_numbers)
{
$base_page = 1;
}
else
{
$base_page = 0;
}
// Determine the current page number.
$CI =& get_instance();
if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
{
if ($CI->input->get($this->query_string_segment) != $base_page)
{
$this->cur_page = $CI->input->get($this->query_string_segment);
// Prep the current page - no funny business!
$this->cur_page = (int) $this->cur_page;
}
}
else
{
if ($CI->uri->segment($this->uri_segment) != $base_page)
{
$this->cur_page = $CI->uri->segment($this->uri_segment);
// Prep the current page - no funny business!
$this->cur_page = (int) $this->cur_page;
}
}
// Set current page to 1 if using page numbers instead of offset
if ($this->use_page_numbers AND $this->cur_page == 0)
{
$this->cur_page = $base_page;
}
$this->num_links = (int)$this->num_links;
if ($this->num_links < 1)
{
show_error('Your number of links must be a positive number.');
}
if ( ! is_numeric($this->cur_page))
{
$this->cur_page = $base_page;
}
// Is the page number beyond the result range?
// If so we show the last page
if ($this->use_page_numbers)
{
if ($this->cur_page > $num_pages)
{
$this->cur_page = $num_pages;
}
}
else
{
if ($this->cur_page > $this->total_rows)
{
$this->cur_page = ($num_pages - 1) * $this->per_page;
}
}
$uri_page_number = $this->cur_page;
if ( ! $this->use_page_numbers)
{
$this->cur_page = floor(($this->cur_page/$this->per_page) + 1);
}
// Calculate the start and end numbers. These determine
// which number to start and end the digit links with
$start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;
$end = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;
// Is pagination being used over GET or POST? If get, add a per_page query
// string. If post, add a trailing slash to the base URL if needed
if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
{
$this->base_url = rtrim($this->base_url).'&amp;'.$this->query_string_segment.'=';
}
else
{
$this->base_url = rtrim($this->base_url, '/') .'/';
}
// And here we go...
$output = '';
// Render the "First" link
if ($this->first_link !== FALSE AND $this->cur_page > ($this->num_links + 1))
{
$first_url = ($this->first_url == '') ? $this->base_url : $this->first_url;
$output .= $this->first_tag_open.'<a '.$this->anchor_class.'href="'.$first_url.'">'.$this->first_link.'</a>'.$this->first_tag_close;
}
// Render the "previous" link
if ($this->prev_link !== FALSE AND $this->cur_page != 1)
{
if ($this->use_page_numbers)
{
$i = $uri_page_number - 1;
}
else
{
$i = $uri_page_number - $this->per_page;
}
if ($i == 0 && $this->first_url != '')
{
$output .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->first_url.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
}
else
{
$i = ($i == 0) ? '' : $this->prefix.$i.$this->suffix;
$output .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
}
}
// Render the pages
if ($this->display_pages !== FALSE)
{
// Write the digit links
for ($loop = $start -1; $loop <= $end; $loop++)
{
if ($this->use_page_numbers)
{
$i = $loop;
}
else
{
$i = ($loop * $this->per_page) - $this->per_page;
}
if ($i >= $base_page)
{
if ($this->cur_page == $loop)
{
$output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
}
else
{
$n = ($i == $base_page) ? '' : $i;
if ($n == '' && $this->first_url != '')
{
$output .= $this->num_tag_open.'<a '.$this->anchor_class.'href="'.$this->first_url.'">'.$loop.'</a>'.$this->num_tag_close;
}
else
{
$n = ($n == '') ? '' : $this->prefix.$n.$this->suffix;
$output .= $this->num_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$n.'">'.$loop.'</a>'.$this->num_tag_close;
}
}
}
}
}
// Render the "next" link
if ($this->next_link !== FALSE AND $this->cur_page < $num_pages)
{
if ($this->use_page_numbers)
{
$i = $this->cur_page + 1;
}
else
{
$i = ($this->cur_page * $this->per_page);
}
$output .= $this->next_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$this->prefix.$i.$this->suffix.'">'.$this->next_link.'</a>'.$this->next_tag_close;
}
// Render the "Last" link
if ($this->last_link !== FALSE AND ($this->cur_page + $this->num_links) < $num_pages)
{
if ($this->use_page_numbers)
{
$i = $num_pages;
}
else
{
$i = (($num_pages * $this->per_page) - $this->per_page);
}
$output .= $this->last_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$this->prefix.$i.$this->suffix.'">'.$this->last_link.'</a>'.$this->last_tag_close;
}
// Kill double slashes. Note: Sometimes we can end up with a double slash
// in the penultimate link so we'll kill all double slashes.
$output = preg_replace("#([^:])//+#", "\\1/", $output);
// Add the wrapper HTML if exists
$output = $this->full_tag_open.$output.$this->full_tag_close;
return $output;
}
}
// END Pagination Class
/* End of file Pagination.php */
/* Location: ./system/libraries/Pagination.php */
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