704 lines
16 KiB
PHP
704 lines
16 KiB
PHP
<?php
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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
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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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 EllisLab Dev Team
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* @link https://codeigniter.com/userguide3/libraries/pagination.html
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*/
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class CI_Pagination {
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/**
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* Base URL
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*
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* The page that we're linking to
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*
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* @var string
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*/
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protected $base_url = '';
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/**
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* Prefix
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*
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* @var string
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*/
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protected $prefix = '';
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/**
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* Suffix
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*
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* @var string
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*/
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protected $suffix = '';
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/**
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* Total number of items
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*
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* @var int
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*/
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protected $total_rows = 0;
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/**
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* Number of links to show
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*
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* Relates to "digit" type links shown before/after
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* the currently viewed page.
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*
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* @var int
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*/
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protected $num_links = 2;
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/**
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* Items per page
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*
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* @var int
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*/
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public $per_page = 10;
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/**
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* Current page
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*
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* @var int
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*/
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public $cur_page = 0;
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/**
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* Use page numbers flag
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*
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* Whether to use actual page numbers instead of an offset
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*
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* @var bool
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*/
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protected $use_page_numbers = FALSE;
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/**
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* First link
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*
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* @var string
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*/
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protected $first_link = '‹ First';
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/**
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* Next link
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*
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* @var string
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*/
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protected $next_link = '>';
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/**
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* Previous link
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*
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* @var string
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*/
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protected $prev_link = '<';
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/**
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* Last link
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*
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* @var string
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*/
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protected $last_link = 'Last ›';
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/**
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* URI Segment
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*
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* @var int
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*/
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protected $uri_segment = 0;
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/**
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* Full tag open
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*
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* @var string
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*/
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protected $full_tag_open = '';
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/**
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* Full tag close
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*
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* @var string
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*/
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protected $full_tag_close = '';
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/**
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* First tag open
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*
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* @var string
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*/
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protected $first_tag_open = '';
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/**
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* First tag close
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*
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* @var string
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*/
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protected $first_tag_close = '';
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/**
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* Last tag open
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*
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* @var string
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*/
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protected $last_tag_open = '';
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/**
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* Last tag close
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*
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* @var string
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*/
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protected $last_tag_close = '';
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/**
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* First URL
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*
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* An alternative URL for the first page
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*
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* @var string
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*/
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protected $first_url = '';
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/**
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* Current tag open
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*
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* @var string
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*/
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protected $cur_tag_open = '<strong>';
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/**
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* Current tag close
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*
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* @var string
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*/
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protected $cur_tag_close = '</strong>';
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/**
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* Next tag open
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*
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* @var string
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*/
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protected $next_tag_open = '';
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/**
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* Next tag close
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*
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* @var string
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*/
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protected $next_tag_close = '';
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/**
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* Previous tag open
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*
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* @var string
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*/
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protected $prev_tag_open = '';
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/**
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* Previous tag close
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*
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* @var string
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*/
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protected $prev_tag_close = '';
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/**
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* Number tag open
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*
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* @var string
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*/
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protected $num_tag_open = '';
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/**
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* Number tag close
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*
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* @var string
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*/
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protected $num_tag_close = '';
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/**
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* Page query string flag
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*
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* @var bool
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*/
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protected $page_query_string = FALSE;
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/**
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* Query string segment
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*
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* @var string
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*/
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protected $query_string_segment = 'per_page';
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/**
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* Display pages flag
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*
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* @var bool
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*/
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protected $display_pages = TRUE;
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/**
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* Attributes
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*
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* @var string
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*/
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protected $_attributes = '';
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/**
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* Link types
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*
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* "rel" attribute
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*
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* @see CI_Pagination::_attr_rel()
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* @var array
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*/
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protected $_link_types = array();
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/**
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* Reuse query string flag
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*
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* @var bool
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*/
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protected $reuse_query_string = FALSE;
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/**
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* Use global URL suffix flag
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*
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* @var bool
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*/
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protected $use_global_url_suffix = FALSE;
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/**
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* Data page attribute
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*
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* @var string
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*/
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protected $data_page_attr = 'data-ci-pagination-page';
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/**
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* CI Singleton
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*
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* @var object
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*/
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protected $CI;
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// --------------------------------------------------------------------
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/**
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* Constructor
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*
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* @param array $params Initialization parameters
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* @return void
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*/
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public function __construct($params = array())
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{
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$this->CI =& get_instance();
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$this->CI->load->language('pagination');
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foreach (array('first_link', 'next_link', 'prev_link', 'last_link') as $key)
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{
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if (($val = $this->CI->lang->line('pagination_'.$key)) !== FALSE)
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{
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$this->$key = $val;
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}
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}
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// _parse_attributes(), called by initialize(), needs to run at least once
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// in order to enable "rel" attributes, and this triggers it.
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isset($params['attributes']) OR $params['attributes'] = array();
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$this->initialize($params);
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log_message('info', '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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* @param array $params Initialization parameters
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* @return CI_Pagination
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*/
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public function initialize(array $params = array())
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{
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if (isset($params['attributes']) && is_array($params['attributes']))
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{
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$this->_parse_attributes($params['attributes']);
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unset($params['attributes']);
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}
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// Deprecated legacy support for the anchor_class option
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// Should be removed in CI 3.1+
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if (isset($params['anchor_class']))
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{
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empty($params['anchor_class']) OR $attributes['class'] = $params['anchor_class'];
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unset($params['anchor_class']);
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}
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foreach ($params as $key => $val)
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{
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if (property_exists($this, $key))
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{
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$this->$key = $val;
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}
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}
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if ($this->CI->config->item('enable_query_strings') === TRUE)
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{
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$this->page_query_string = TRUE;
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}
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if ($this->use_global_url_suffix === TRUE)
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{
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$this->suffix = $this->CI->config->item('url_suffix');
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}
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Generate the pagination links
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*
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* @return string
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*/
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public function create_links()
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{
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// If our item count or per-page total is zero there is no need to continue.
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// Note: DO NOT change the operator to === here!
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if ($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 = (int) 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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// Check the user defined number of links.
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$this->num_links = (int) $this->num_links;
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if ($this->num_links < 0)
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{
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show_error('Your number of links must be a non-negative number.');
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}
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// Keep any existing query string items.
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// Note: Has nothing to do with any other query string option.
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if ($this->reuse_query_string === TRUE)
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{
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$get = $this->CI->input->get();
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// Unset the control, method, old-school routing options
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unset($get['c'], $get['m'], $get[$this->query_string_segment]);
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}
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else
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{
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$get = array();
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}
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// Put together our base and first URLs.
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// Note: DO NOT append to the properties as that would break successive calls
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$base_url = trim($this->base_url);
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$first_url = $this->first_url;
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$query_string = '';
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$query_string_sep = (strpos($base_url, '?') === FALSE) ? '?' : '&';
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// Are we using query strings?
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if ($this->page_query_string === TRUE)
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{
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// If a custom first_url hasn't been specified, we'll create one from
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// the base_url, but without the page item.
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if ($first_url === '')
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{
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$first_url = $base_url;
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// If we saved any GET items earlier, make sure they're appended.
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if ( ! empty($get))
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{
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$first_url .= $query_string_sep.http_build_query($get);
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}
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}
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// Add the page segment to the end of the query string, where the
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// page number will be appended.
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$base_url .= $query_string_sep.http_build_query(array_merge($get, array($this->query_string_segment => '')));
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}
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else
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{
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// Standard segment mode.
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// Generate our saved query string to append later after the page number.
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if ( ! empty($get))
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{
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$query_string = $query_string_sep.http_build_query($get);
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$this->suffix .= $query_string;
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}
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// Does the base_url have the query string in it?
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// If we're supposed to save it, remove it so we can append it later.
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if ($this->reuse_query_string === TRUE && ($base_query_pos = strpos($base_url, '?')) !== FALSE)
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{
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$base_url = substr($base_url, 0, $base_query_pos);
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}
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if ($first_url === '')
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{
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$first_url = $base_url.$query_string;
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}
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$base_url = rtrim($base_url, '/').'/';
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}
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// Determine the current page number.
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$base_page = ($this->use_page_numbers) ? 1 : 0;
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// Are we using query strings?
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if ($this->page_query_string === TRUE)
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{
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$this->cur_page = $this->CI->input->get($this->query_string_segment);
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}
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elseif (empty($this->cur_page))
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{
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// Default to the last segment number if one hasn't been defined.
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if ($this->uri_segment === 0)
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{
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$this->uri_segment = count($this->CI->uri->segment_array());
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}
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$this->cur_page = $this->CI->uri->segment($this->uri_segment);
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// Remove any specified prefix/suffix from the segment.
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if ($this->prefix !== '' OR $this->suffix !== '')
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{
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$this->cur_page = str_replace(array($this->prefix, $this->suffix), '', $this->cur_page);
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}
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}
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else
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{
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$this->cur_page = (string) $this->cur_page;
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}
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// If something isn't quite right, back to the default base page.
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if ( ! ctype_digit($this->cur_page) OR ($this->use_page_numbers && (int) $this->cur_page === 0))
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{
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$this->cur_page = $base_page;
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}
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else
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{
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// Make sure we're using integers for comparisons later.
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$this->cur_page = (int) $this->cur_page;
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}
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// Is the page number beyond the result range?
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// If so, we show the last page.
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if ($this->use_page_numbers)
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{
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if ($this->cur_page > $num_pages)
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{
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$this->cur_page = $num_pages;
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}
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}
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elseif ($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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// If we're using offset instead of page numbers, convert it
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// to a page number, so we can generate the surrounding number links.
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if ( ! $this->use_page_numbers)
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{
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$this->cur_page = (int) floor(($this->cur_page/$this->per_page) + 1);
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}
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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 : $num_pages;
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// And here we go...
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$output = '';
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// Render the "First" link.
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if ($this->first_link !== FALSE && $this->cur_page > ($this->num_links + 1 + ! $this->num_links))
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{
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// Take the general parameters, and squeeze this pagination-page attr in for JS frameworks.
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$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, 1);
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$output .= $this->first_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>'
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.$this->first_link.'</a>'.$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 && $this->cur_page !== 1)
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{
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$i = ($this->use_page_numbers) ? $uri_page_number - 1 : $uri_page_number - $this->per_page;
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$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, ($this->cur_page - 1));
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if ($i === $base_page)
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{
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// First page
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$output .= $this->prev_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('prev').'>'
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.$this->prev_link.'</a>'.$this->prev_tag_close;
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}
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else
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{
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$append = $this->prefix.$i.$this->suffix;
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$output .= $this->prev_tag_open.'<a href="'.$base_url.$append.'"'.$attributes.$this->_attr_rel('prev').'>'
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.$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 = ($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 https://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 '';
|
|
}
|
|
|
|
}
|