252 lines
9.9 KiB
PHP
252 lines
9.9 KiB
PHP
<?php defined("SYSPATH") or die("No direct script access.");
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/**
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* Gallery - a web based photo album viewer and editor
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* Copyright (C) 2000-2013 Bharat Mediratta
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/**
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* Pagination library.
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*
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* $Id: Pagination.php 3769 2008-12-15 00:48:56Z zombor $
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class Pagination_Core {
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// Config values
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protected $base_url = '';
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protected $directory = 'pagination';
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protected $style = 'classic';
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protected $uri_segment = 3;
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protected $query_string = '';
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protected $items_per_page = 20;
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protected $total_items = 0;
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protected $auto_hide = FALSE;
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// Autogenerated values
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protected $url;
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protected $current_page;
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protected $total_pages;
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protected $current_first_item;
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protected $current_last_item;
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protected $first_page;
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protected $last_page;
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protected $previous_page;
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protected $next_page;
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protected $sql_offset;
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protected $sql_limit;
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/**
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* Constructs and returns a new Pagination object.
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*
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* @param array configuration settings
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* @return object
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*/
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public function factory($config = array())
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{
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return new Pagination($config);
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}
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/**
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* Constructs a new Pagination object.
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*
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* @param array configuration settings
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* @return void
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*/
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public function __construct($config = array())
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{
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// No custom group name given
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if ( ! isset($config['group']))
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{
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$config['group'] = 'default';
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}
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// Pagination setup
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$this->initialize($config);
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}
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/**
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* Sets config values.
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*
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* @throws Kohana_Exception
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* @param array configuration settings
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* @return void
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*/
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public function initialize($config = array())
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{
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// Load config group
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if (isset($config['group']))
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{
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// Load and validate config group
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if ( ! is_array($group_config = Kohana::config('pagination.'.$config['group'])))
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throw new Kohana_Exception('pagination.undefined_group: ' . $config['group']);
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// All pagination config groups inherit default config group
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if ($config['group'] !== 'default')
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{
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// Load and validate default config group
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if ( ! is_array($default_config = Kohana::config('pagination.default')))
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throw new Kohana_Exception('pagination.undefined_group: default');
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// Merge config group with default config group
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$group_config += $default_config;
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}
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// Merge custom config items with config group
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$config += $group_config;
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}
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// Assign config values to the object
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foreach ($config as $key => $value)
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{
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if (property_exists($this, $key))
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{
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$this->$key = $value;
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}
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}
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// Clean view directory
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$this->directory = trim($this->directory, '/').'/';
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// Build generic URL with page in query string
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if ($this->query_string !== '')
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{
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// Extract current page
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$this->current_page = isset($_GET[$this->query_string]) ? (int) $_GET[$this->query_string] : 1;
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// Insert {page} placeholder
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$_GET[$this->query_string] = '{page}';
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// Create full URL
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$base_url = ($this->base_url === '') ? Router::$current_uri : $this->base_url;
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$this->url = url::site($base_url).'?'.str_replace('%7Bpage%7D', '{page}', http_build_query($_GET));
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// Reset page number
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$_GET[$this->query_string] = $this->current_page;
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}
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// Build generic URL with page as URI segment
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else
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{
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// Use current URI if no base_url set
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$this->url = ($this->base_url === '') ? Router::$segments : explode('/', trim($this->base_url, '/'));
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// Convert uri 'label' to corresponding integer if needed
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if (is_string($this->uri_segment))
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{
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if (($key = array_search($this->uri_segment, $this->url)) === FALSE)
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{
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// If uri 'label' is not found, auto add it to base_url
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$this->url[] = $this->uri_segment;
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$this->uri_segment = count($this->url) + 1;
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}
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else
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{
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$this->uri_segment = $key + 2;
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}
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}
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// Insert {page} placeholder
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$this->url[$this->uri_segment - 1] = '{page}';
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// Create full URL
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$this->url = url::site(implode('/', $this->url)).Router::$query_string;
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// Extract current page
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$this->current_page = URI::instance()->segment($this->uri_segment);
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}
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// Core pagination values
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$this->total_items = (int) max(0, $this->total_items);
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$this->items_per_page = (int) max(1, $this->items_per_page);
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$this->total_pages = (int) ceil($this->total_items / $this->items_per_page);
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$this->current_page = (int) min(max(1, $this->current_page), max(1, $this->total_pages));
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$this->current_first_item = (int) min((($this->current_page - 1) * $this->items_per_page) + 1, $this->total_items);
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$this->current_last_item = (int) min($this->current_first_item + $this->items_per_page - 1, $this->total_items);
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// If there is no first/last/previous/next page, relative to the
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// current page, value is set to FALSE. Valid page number otherwise.
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$this->first_page = ($this->current_page === 1) ? FALSE : 1;
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$this->last_page = ($this->current_page >= $this->total_pages) ? FALSE : $this->total_pages;
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$this->previous_page = ($this->current_page > 1) ? $this->current_page - 1 : FALSE;
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$this->next_page = ($this->current_page < $this->total_pages) ? $this->current_page + 1 : FALSE;
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// SQL values
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$this->sql_offset = (int) ($this->current_page - 1) * $this->items_per_page;
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$this->sql_limit = sprintf(' LIMIT %d OFFSET %d ', $this->items_per_page, $this->sql_offset);
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}
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/**
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* Generates the HTML for the chosen pagination style.
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*
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* @param string pagination style
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* @return string pagination html
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*/
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public function render($style = NULL)
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{
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// Hide single page pagination
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if ($this->auto_hide === TRUE AND $this->total_pages <= 1)
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return '';
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if ($style === NULL)
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{
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// Use default style
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$style = $this->style;
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}
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// Return rendered pagination view
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return View::factory($this->directory.$style, get_object_vars($this))->render();
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}
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/**
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* Magically converts Pagination object to string.
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*
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* @return string pagination html
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*/
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public function __toString()
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{
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return $this->render();
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}
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/**
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* Magically gets a pagination variable.
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*
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* @param string variable key
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* @return mixed variable value if the key is found
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* @return void if the key is not found
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*/
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public function __get($key)
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{
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if (isset($this->$key))
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return $this->$key;
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}
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/**
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* Adds a secondary interface for accessing properties, e.g. $pagination->total_pages().
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* Note that $pagination->total_pages is the recommended way to access properties.
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*
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* @param string function name
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* @return string
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*/
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public function __call($func, $args = NULL)
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{
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return $this->__get($func);
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}
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} // End Pagination Class
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