Current File : /www/old2/_music/diplomka/diplomka/src/API/libs/Nette/Utils/Paginator.php
<?php
/**
* This file is part of the Nette Framework (http://nette.org)
*
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*
* For the full copyright and license information, please view
* the file license.txt that was distributed with this source code.
*/
namespace Nette\Utils;
use Nette;
/**
* Paginating math.
*
* @author David Grudl
*
* @property int $page
* @property-read int $firstPage
* @property-read int|NULL $lastPage
* @property int $base
* @property-read bool $first
* @property-read bool $last
* @property-read int|NULL $pageCount
* @property int $itemsPerPage
* @property int|NULL $itemCount
* @property-read int $offset
* @property-read int|NULL $countdownOffset
* @property-read int|NULL $length
*/
class Paginator extends Nette\Object
{
/** @var int */
private $base = 1;
/** @var int */
private $itemsPerPage = 1;
/** @var int */
private $page;
/** @var int|NULL */
private $itemCount;
/**
* Sets current page number.
* @param int
* @return Paginator provides a fluent interface
*/
public function setPage($page)
{
$this->page = (int) $page;
return $this;
}
/**
* Returns current page number.
* @return int
*/
public function getPage()
{
return $this->base + $this->getPageIndex();
}
/**
* Returns first page number.
* @return int
*/
public function getFirstPage()
{
return $this->base;
}
/**
* Returns last page number.
* @return int|NULL
*/
public function getLastPage()
{
return $this->itemCount === NULL ? NULL : $this->base + max(0, $this->getPageCount() - 1);
}
/**
* Sets first page (base) number.
* @param int
* @return Paginator provides a fluent interface
*/
public function setBase($base)
{
$this->base = (int) $base;
return $this;
}
/**
* Returns first page (base) number.
* @return int
*/
public function getBase()
{
return $this->base;
}
/**
* Returns zero-based page number.
* @return int
*/
protected function getPageIndex()
{
$index = max(0, $this->page - $this->base);
return $this->itemCount === NULL ? $index : min($index, max(0, $this->getPageCount() - 1));
}
/**
* Is the current page the first one?
* @return bool
*/
public function isFirst()
{
return $this->getPageIndex() === 0;
}
/**
* Is the current page the last one?
* @return bool
*/
public function isLast()
{
return $this->itemCount === NULL ? FALSE : $this->getPageIndex() >= $this->getPageCount() - 1;
}
/**
* Returns the total number of pages.
* @return int|NULL
*/
public function getPageCount()
{
return $this->itemCount === NULL ? NULL : (int) ceil($this->itemCount / $this->itemsPerPage);
}
/**
* Sets the number of items to display on a single page.
* @param int
* @return Paginator provides a fluent interface
*/
public function setItemsPerPage($itemsPerPage)
{
$this->itemsPerPage = max(1, (int) $itemsPerPage);
return $this;
}
/**
* Returns the number of items to display on a single page.
* @return int
*/
public function getItemsPerPage()
{
return $this->itemsPerPage;
}
/**
* Sets the total number of items.
* @param int (or NULL as infinity)
* @return Paginator provides a fluent interface
*/
public function setItemCount($itemCount)
{
$this->itemCount = ($itemCount === FALSE || $itemCount === NULL) ? NULL : max(0, (int) $itemCount);
return $this;
}
/**
* Returns the total number of items.
* @return int|NULL
*/
public function getItemCount()
{
return $this->itemCount;
}
/**
* Returns the absolute index of the first item on current page.
* @return int
*/
public function getOffset()
{
return $this->getPageIndex() * $this->itemsPerPage;
}
/**
* Returns the absolute index of the first item on current page in countdown paging.
* @return int|NULL
*/
public function getCountdownOffset()
{
return $this->itemCount === NULL
? NULL
: max(0, $this->itemCount - ($this->getPageIndex() + 1) * $this->itemsPerPage);
}
/**
* Returns the number of items on current page.
* @return int|NULL
*/
public function getLength()
{
return $this->itemCount === NULL
? $this->itemsPerPage
: min($this->itemsPerPage, $this->itemCount - $this->getPageIndex() * $this->itemsPerPage);
}
}
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