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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2009 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* Pagination library.
*
* $Id: Pagination.php 3769 2008-12-15 00:48:56Z zombor $
*
* @package Core
* @author Kohana Team
* @copyright (c) 2007-2008 Kohana Team
* @license http://kohanaphp.com/license.html
*/
class Pagination_Core {
// Config values
protected $base_url = '';
protected $directory = 'pagination';
protected $style = 'classic';
protected $uri_segment = 3;
protected $query_string = '';
protected $items_per_page = 20;
protected $total_items = 0;
protected $auto_hide = FALSE;
// Autogenerated values
protected $url;
protected $current_page;
protected $total_pages;
protected $current_first_item;
protected $current_last_item;
protected $first_page;
protected $last_page;
protected $previous_page;
protected $next_page;
protected $sql_offset;
protected $sql_limit;
/**
* Constructs and returns a new Pagination object.
*
* @param array configuration settings
* @return object
*/
public function factory($config = array())
{
return new Pagination($config);
}
/**
* Constructs a new Pagination object.
*
* @param array configuration settings
* @return void
*/
public function __construct($config = array())
{
// No custom group name given
if ( ! isset($config['group']))
{
$config['group'] = 'default';
}
// Pagination setup
$this->initialize($config);
}
/**
* Sets config values.
*
* @throws Kohana_Exception
* @param array configuration settings
* @return void
*/
public function initialize($config = array())
{
// Load config group
if (isset($config['group']))
{
// Load and validate config group
if ( ! is_array($group_config = Kohana::config('pagination.'.$config['group'])))
throw new Kohana_Exception('pagination.undefined_group: ' . $config['group']);
// All pagination config groups inherit default config group
if ($config['group'] !== 'default')
{
// Load and validate default config group
if ( ! is_array($default_config = Kohana::config('pagination.default')))
throw new Kohana_Exception('pagination.undefined_group: default');
// Merge config group with default config group
$group_config += $default_config;
}
// Merge custom config items with config group
$config += $group_config;
}
// Assign config values to the object
foreach ($config as $key => $value)
{
if (property_exists($this, $key))
{
$this->$key = $value;
}
}
// Clean view directory
$this->directory = trim($this->directory, '/').'/';
// Build generic URL with page in query string
if ($this->query_string !== '')
{
// Extract current page
$this->current_page = isset($_GET[$this->query_string]) ? (int) $_GET[$this->query_string] : 1;
// Insert {page} placeholder
$_GET[$this->query_string] = '{page}';
// Create full URL
$base_url = ($this->base_url === '') ? Router::$current_uri : $this->base_url;
$this->url = url::site($base_url).'?'.str_replace('%7Bpage%7D', '{page}', http_build_query($_GET));
// Reset page number
$_GET[$this->query_string] = $this->current_page;
}
// Build generic URL with page as URI segment
else
{
// Use current URI if no base_url set
$this->url = ($this->base_url === '') ? Router::$segments : explode('/', trim($this->base_url, '/'));
// Convert uri 'label' to corresponding integer if needed
if (is_string($this->uri_segment))
{
if (($key = array_search($this->uri_segment, $this->url)) === FALSE)
{
// If uri 'label' is not found, auto add it to base_url
$this->url[] = $this->uri_segment;
$this->uri_segment = count($this->url) + 1;
}
else
{
$this->uri_segment = $key + 2;
}
}
// Insert {page} placeholder
$this->url[$this->uri_segment - 1] = '{page}';
// Create full URL
$this->url = url::site(implode('/', $this->url)).Router::$query_string;
// Extract current page
$this->current_page = URI::instance()->segment($this->uri_segment);
}
// Core pagination values
$this->total_items = (int) max(0, $this->total_items);
$this->items_per_page = (int) max(1, $this->items_per_page);
$this->total_pages = (int) ceil($this->total_items / $this->items_per_page);
$this->current_page = (int) min(max(1, $this->current_page), max(1, $this->total_pages));
$this->current_first_item = (int) min((($this->current_page - 1) * $this->items_per_page) + 1, $this->total_items);
$this->current_last_item = (int) min($this->current_first_item + $this->items_per_page - 1, $this->total_items);
// If there is no first/last/previous/next page, relative to the
// current page, value is set to FALSE. Valid page number otherwise.
$this->first_page = ($this->current_page === 1) ? FALSE : 1;
$this->last_page = ($this->current_page >= $this->total_pages) ? FALSE : $this->total_pages;
$this->previous_page = ($this->current_page > 1) ? $this->current_page - 1 : FALSE;
$this->next_page = ($this->current_page < $this->total_pages) ? $this->current_page + 1 : FALSE;
// SQL values
$this->sql_offset = (int) ($this->current_page - 1) * $this->items_per_page;
$this->sql_limit = sprintf(' LIMIT %d OFFSET %d ', $this->items_per_page, $this->sql_offset);
}
/**
* Generates the HTML for the chosen pagination style.
*
* @param string pagination style
* @return string pagination html
*/
public function render($style = NULL)
{
// Hide single page pagination
if ($this->auto_hide === TRUE AND $this->total_pages <= 1)
return '';
if ($style === NULL)
{
// Use default style
$style = $this->style;
}
// Return rendered pagination view
return View::factory($this->directory.$style, get_object_vars($this))->render();
}
/**
* Magically converts Pagination object to string.
*
* @return string pagination html
*/
public function __toString()
{
return $this->render();
}
/**
* Magically gets a pagination variable.
*
* @param string variable key
* @return mixed variable value if the key is found
* @return void if the key is not found
*/
public function __get($key)
{
if (isset($this->$key))
return $this->$key;
}
/**
* Adds a secondary interface for accessing properties, e.g. $pagination->total_pages().
* Note that $pagination->total_pages is the recommended way to access properties.
*
* @param string function name
* @return string
*/
public function __call($func, $args = NULL)
{
return $this->__get($func);
}
} // End Pagination Class
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