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Diffstat (limited to 'system/libraries/Pagination.php')
| -rw-r--r-- | system/libraries/Pagination.php | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/system/libraries/Pagination.php b/system/libraries/Pagination.php new file mode 100644 index 000000000..d73c58e08 --- /dev/null +++ b/system/libraries/Pagination.php @@ -0,0 +1,244 @@ +<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +/** + * CodeIgniter + * + * An open source application development framework for PHP 4.3.2 or newer + * + * @package CodeIgniter + * @author ExpressionEngine Dev Team + * @copyright Copyright (c) 2008 - 2009, 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 $total_rows = ''; // 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 $first_link = '‹ First'; + var $next_link = '>'; + var $prev_link = '<'; + var $last_link = 'Last ›'; + var $uri_segment = 3; + var $full_tag_open = ''; + var $full_tag_close = ''; + var $first_tag_open = ''; + var $first_tag_close = ' '; + var $last_tag_open = ' '; + var $last_tag_close = ''; + var $cur_tag_open = ' <strong>'; + var $cur_tag_close = '</strong>'; + var $next_tag_open = ' '; + var $next_tag_close = ' '; + var $prev_tag_open = ' '; + var $prev_tag_close = ''; + var $num_tag_open = ' '; + var $num_tag_close = ''; + var $page_query_string = FALSE; + var $query_string_segment = 'per_page'; + + /** + * Constructor + * + * @access public + * @param array initialization parameters + */ + function CI_Pagination($params = array()) + { + if (count($params) > 0) + { + $this->initialize($params); + } + + 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 ''; + } + + // 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) != 0) + { + $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) != 0) + { + $this->cur_page = $CI->uri->segment($this->uri_segment); + + // Prep the current page - no funny business! + $this->cur_page = (int) $this->cur_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)) + { + $this->cur_page = 0; + } + + // Is the page number beyond the result range? + // If so we show the last page + if ($this->cur_page > $this->total_rows) + { + $this->cur_page = ($num_pages - 1) * $this->per_page; + } + + $uri_page_number = $this->cur_page; + $this->cur_page = floor(($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).'&'.$this->query_string_segment.'='; + } + else + { + $this->base_url = rtrim($this->base_url, '/') .'/'; + } + + // And here we go... + $output = ''; + + // Render the "First" link + if ($this->cur_page > ($this->num_links + 1)) + { + $output .= $this->first_tag_open.'<a href="'.$this->base_url.'">'.$this->first_link.'</a>'.$this->first_tag_close; + } + + // Render the "previous" link + if ($this->cur_page != 1) + { + $i = $uri_page_number - $this->per_page; + if ($i == 0) $i = ''; + $output .= $this->prev_tag_open.'<a href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close; + } + + // Write the digit links + for ($loop = $start -1; $loop <= $end; $loop++) + { + $i = ($loop * $this->per_page) - $this->per_page; + + if ($i >= 0) + { + if ($this->cur_page == $loop) + { + $output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page + } + else + { + $n = ($i == 0) ? '' : $i; + $output .= $this->num_tag_open.'<a href="'.$this->base_url.$n.'">'.$loop.'</a>'.$this->num_tag_close; + } + } + } + + // Render the "next" link + if ($this->cur_page < $num_pages) + { + $output .= $this->next_tag_open.'<a href="'.$this->base_url.($this->cur_page * $this->per_page).'">'.$this->next_link.'</a>'.$this->next_tag_close; + } + + // Render the "Last" link + if (($this->cur_page + $this->num_links) < $num_pages) + { + $i = (($num_pages * $this->per_page) - $this->per_page); + $output .= $this->last_tag_open.'<a href="'.$this->base_url.$i.'">'.$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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