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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * Pagination Class * * @package CodeIgniter * @subpackage Libraries * @category Pagination * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/libraries/pagination.html */ class CI_Pagination { /** * Base URL * * The page that we're linking to * * @var string */ protected $base_url = ''; /** * Prefix * * @var string */ protected $prefix = ''; /** * Suffix * * @var string */ protected $suffix = ''; /** * Total number of items * * @var int */ protected $total_rows = 0; /** * Number of links to show * * Relates to "digit" type links shown before/after * the currently viewed page. * * @var int */ protected $num_links = 2; /** * Items per page * * @var int */ public $per_page = 10; /** * Current page * * @var int */ public $cur_page = 0; /** * Use page numbers flag * * Whether to use actual page numbers instead of an offset * * @var bool */ protected $use_page_numbers = FALSE; /** * First link * * @var string */ protected $first_link = '&lsaquo; First'; /** * Next link * * @var string */ protected $next_link = '>'; /** * Previous link * * @var string */ protected $prev_link = '<'; /** * Last link * * @var string */ protected $last_link = 'Last &rsaquo;'; /** * URI Segment * * @var int */ protected $uri_segment = 0; /** * Full tag open * * @var string */ protected $full_tag_open = ''; /** * Full tag close * * @var string */ protected $full_tag_close = ''; /** * First tag open * * @var string */ protected $first_tag_open = ''; /** * First tag close * * @var string */ protected $first_tag_close = ''; /** * Last tag open * * @var string */ protected $last_tag_open = ''; /** * Last tag close * * @var string */ protected $last_tag_close = ''; /** * First URL * * An alternative URL for the first page * * @var string */ protected $first_url = ''; /** * Current tag open * * @var string */ protected $cur_tag_open = '<strong>'; /** * Current tag close * * @var string */ protected $cur_tag_close = '</strong>'; /** * Next tag open * * @var string */ protected $next_tag_open = ''; /** * Next tag close * * @var string */ protected $next_tag_close = ''; /** * Previous tag open * * @var string */ protected $prev_tag_open = ''; /** * Previous tag close * * @var string */ protected $prev_tag_close = ''; /** * Number tag open * * @var string */ protected $num_tag_open = ''; /** * Number tag close * * @var string */ protected $num_tag_close = ''; /** * Page query string flag * * @var bool */ protected $page_query_string = FALSE; /** * Query string segment * * @var string */ protected $query_string_segment = 'per_page'; /** * Display pages flag * * @var bool */ protected $display_pages = TRUE; /** * Attributes * * @var string */ protected $_attributes = ''; /** * Link types * * "rel" attribute * * @see CI_Pagination::_attr_rel() * @var array */ protected $_link_types = array(); /** * Reuse query string flag * * @var bool */ protected $reuse_query_string = FALSE; /** * Use global URL suffix flag * * @var bool */ protected $use_global_url_suffix = FALSE; /** * Data page attribute * * @var string */ protected $data_page_attr = 'data-ci-pagination-page'; /** * CI Singleton * * @var object */ protected $CI; // -------------------------------------------------------------------- /** * Constructor * * @param array $params Initialization parameters * @return void */ public function __construct($params = array()) { $this->CI =& get_instance(); $this->CI->load->language('pagination'); foreach (array('first_link', 'next_link', 'prev_link', 'last_link') as $key) { if (($val = $this->CI->lang->line('pagination_'.$key)) !== FALSE) { $this->$key = $val; } } // _parse_attributes(), called by initialize(), needs to run at least once // in order to enable "rel" attributes, and this triggers it. isset($params['attributes']) OR $params['attributes'] = array(); $this->initialize($params); log_message('info', 'Pagination Class Initialized'); } // -------------------------------------------------------------------- /** * Initialize Preferences * * @param array $params Initialization parameters * @return CI_Pagination */ public function initialize(array $params = array()) { if (isset($params['attributes']) && is_array($params['attributes'])) { $this->_parse_attributes($params['attributes']); unset($params['attributes']); } // Deprecated legacy support for the anchor_class option // Should be removed in CI 3.1+ if (isset($params['anchor_class'])) { empty($params['anchor_class']) OR $attributes['class'] = $params['anchor_class']; unset($params['anchor_class']); } foreach ($params as $key => $val) { if (property_exists($this, $key)) { $this->$key = $val; } } if ($this->CI->config->item('enable_query_strings') === TRUE) { $this->page_query_string = TRUE; } if ($this->use_global_url_suffix === TRUE) { $this->suffix = $this->CI->config->item('url_suffix'); } return $this; } // -------------------------------------------------------------------- /** * Generate the pagination links * * @return string */ public function create_links() { // If our item count or per-page total is zero there is no need to continue. // Note: DO NOT change the operator to === here! if ($this->total_rows == 0 OR $this->per_page == 0) { return ''; } // Calculate the total number of pages $num_pages = (int) ceil($this->total_rows / $this->per_page); // Is there only one page? Hm... nothing more to do here then. if ($num_pages === 1) { return ''; } // Check the user defined number of links. $this->num_links = (int) $this->num_links; if ($this->num_links < 0) { show_error('Your number of links must be a non-negative number.'); } // Keep any existing query string items. // Note: Has nothing to do with any other query string option. if ($this->reuse_query_string === TRUE) { $get = $this->CI->input->get(); // Unset the control, method, old-school routing options unset($get['c'], $get['m'], $get[$this->query_string_segment]); } else { $get = array(); } // Put together our base and first URLs. // Note: DO NOT append to the properties as that would break successive calls $base_url = trim($this->base_url); $first_url = $this->first_url; $query_string = ''; $query_string_sep = (strpos($base_url, '?') === FALSE) ? '?' : '&'; // Are we using query strings? if ($this->page_query_string === TRUE) { // If a custom first_url hasn't been specified, we'll create one from // the base_url, but without the page item. if ($first_url === '') { $first_url = $base_url; // If we saved any GET items earlier, make sure they're appended. if ( ! empty($get)) { $first_url .= $query_string_sep.http_build_query($get); } } // Add the page segment to the end of the query string, where the // page number will be appended. $base_url .= $query_string_sep.http_build_query(array_merge($get, array($this->query_string_segment => ''))); } else { // Standard segment mode. // Generate our saved query string to append later after the page number. if ( ! empty($get)) { $query_string = $query_string_sep.http_build_query($get); $this->suffix .= $query_string; } // Does the base_url have the query string in it? // If we're supposed to save it, remove it so we can append it later. if ($this->reuse_query_string === TRUE && ($base_query_pos = strpos($base_url, '?')) !== FALSE) { $base_url = substr($base_url, 0, $base_query_pos); } if ($first_url === '') { $first_url = $base_url.$query_string; } $base_url = rtrim($base_url, '/').'/'; } // Determine the current page number. $base_page = ($this->use_page_numbers) ? 1 : 0; // Are we using query strings? if ($this->page_query_string === TRUE) { $this->cur_page = $this->CI->input->get($this->query_string_segment); } elseif (empty($this->cur_page)) { // Default to the last segment number if one hasn't been defined. if ($this->uri_segment === 0) { $this->uri_segment = count($this->CI->uri->segment_array()); } $this->cur_page = $this->CI->uri->segment($this->uri_segment); // Remove any specified prefix/suffix from the segment. if ($this->prefix !== '' OR $this->suffix !== '') { $this->cur_page = str_replace(array($this->prefix, $this->suffix), '', $this->cur_page); } } else { $this->cur_page = (string) $this->cur_page; } // If something isn't quite right, back to the default base page. if ( ! ctype_digit($this->cur_page) OR ($this->use_page_numbers && (int) $this->cur_page === 0)) { $this->cur_page = $base_page; } else { // Make sure we're using integers for comparisons later. $this->cur_page = (int) $this->cur_page; } // Is the page number beyond the result range? // If so, we show the last page. if ($this->use_page_numbers) { if ($this->cur_page > $num_pages) { $this->cur_page = $num_pages; } } elseif ($this->cur_page > $this->total_rows) { $this->cur_page = ($num_pages - 1) * $this->per_page; } $uri_page_number = $this->cur_page; // If we're using offset instead of page numbers, convert it // to a page number, so we can generate the surrounding number links. if ( ! $this->use_page_numbers) { $this->cur_page = (int) floor(($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; // And here we go... $output = ''; // Render the "First" link. if ($this->first_link !== FALSE && $this->cur_page > ($this->num_links + 1 + ! $this->num_links)) { // Take the general parameters, and squeeze this pagination-page attr in for JS frameworks. $attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, 1); $output .= $this->first_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>' .$this->first_link.'</a>'.$this->first_tag_close; } // Render the "Previous" link. if ($this->prev_link !== FALSE && $this->cur_page !== 1) { $i = ($this->use_page_numbers) ? $uri_page_number - 1 : $uri_page_number - $this->per_page; $attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, ($this->cur_page - 1)); if ($i === $base_page) { // First page $output .= $this->prev_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('prev').'>' .$this->prev_link.'</a>'.$this->prev_tag_close; } else { $append = $this->prefix.$i.$this->suffix; $output .= $this->prev_tag_open.'<a href="'.$base_url.$append.'"'.$attributes.$this->_attr_rel('prev').'>' .$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++) { $i = ($this->use_page_numbers) ? $loop : ($loop * $this->per_page) - $this->per_page; $attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, $loop); if ($i >= $base_page) { if ($this->cur_page === $loop) { // Current page $output .= $this->cur_tag_open.$loop.$this->cur_tag_close; } elseif ($i === $base_page) { // First page $output .= $this->num_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>' .$loop.'</a>'.$this->num_tag_close; } else { $append = $this->prefix.$i.$this->suffix; $output .= $this->num_tag_open.'<a href="'.$base_url.$append.'"'.$attributes.'>' .$loop.'</a>'.$this->num_tag_close; } } } } // Render the "next" link if ($this->next_link !== FALSE && $this->cur_page < $num_pages) { $i = ($this->use_page_numbers) ? $this->cur_page + 1 : $this->cur_page * $this->per_page; $attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, $this->cur_page + 1); $output .= $this->next_tag_open.'<a href="'.$base_url.$this->prefix.$i.$this->suffix.'"'.$attributes .$this->_attr_rel('next').'>'.$this->next_link.'</a>'.$this->next_tag_close; } // Render the "Last" link if ($this->last_link !== FALSE && ($this->cur_page + $this->num_links + ! $this->num_links) < $num_pages) { $i = ($this->use_page_numbers) ? $num_pages : ($num_pages * $this->per_page) - $this->per_page; $attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, $num_pages); $output .= $this->last_tag_open.'<a href="'.$base_url.$this->prefix.$i.$this->suffix.'"'.$attributes.'>' .$this->last_link.'</a>'.$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 return $this->full_tag_open.$output.$this->full_tag_close; } // -------------------------------------------------------------------- /** * Parse attributes * * @param array $attributes * @return void */ protected function _parse_attributes($attributes) { isset($attributes['rel']) OR $attributes['rel'] = TRUE; $this->_link_types = ($attributes['rel']) ? array('start' => 'start', 'prev' => 'prev', 'next' => 'next') : array(); unset($attributes['rel']); $this->_attributes = ''; foreach ($attributes as $key => $value) { $this->_attributes .= ' '.$key.'="'.$value.'"'; } } // -------------------------------------------------------------------- /** * Add "rel" attribute * * @link http://www.w3.org/TR/html5/links.html#linkTypes * @param string $type * @return string */ protected function _attr_rel($type) { if (isset($this->_link_types[$type])) { unset($this->_link_types[$type]); return ' rel="'.$type.'"'; } return ''; } }