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