137 lines
3.7 KiB
PHP
137 lines
3.7 KiB
PHP
<?php
|
|
|
|
/*
|
|
* $Id$
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* This software consists of voluntary contributions made by many individuals
|
|
* and is licensed under the LGPL. For more information, see
|
|
* <http://www.phpdoctrine.org>.
|
|
*/
|
|
|
|
Doctrine::autoload('Doctrine_Pager_Range');
|
|
|
|
/**
|
|
* Doctrine_Pager_Range_Sliding
|
|
*
|
|
* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
|
|
* @package Doctrine
|
|
* @subpackage Pager
|
|
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
|
|
* @version $Revision$
|
|
* @link www.phpdoctrine.org
|
|
* @since 0.9
|
|
*/
|
|
class Doctrine_Pager_Range_Sliding extends Doctrine_Pager_Range
|
|
{
|
|
/**
|
|
* @var int $_chunkLength Chunk length to be returned
|
|
*/
|
|
private $_chunkLength;
|
|
|
|
|
|
/**
|
|
* _initialize
|
|
*
|
|
* Initialize Doctrine_Pager_Range_Sliding and does custom assignments
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _initialize()
|
|
{
|
|
if (isset($this->options['chunk'])) {
|
|
$this->_setChunkLength($this->options['chunk']);
|
|
} else {
|
|
throw new Doctrine_Pager_Exception('Missing parameter \'chunk\' that must be defined in options.');
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* getChunkLength
|
|
*
|
|
* Returns the size of the chunk defined
|
|
*
|
|
* @return int Chunk length
|
|
*/
|
|
public function getChunkLength()
|
|
{
|
|
return $this->_chunkLength;
|
|
}
|
|
|
|
|
|
/**
|
|
* _setChunkLength
|
|
*
|
|
* Defines the size of the chunk
|
|
*
|
|
* @param $chunkLength Chunk length
|
|
* @return void
|
|
*/
|
|
protected function _setChunkLength($chunkLength)
|
|
{
|
|
$chunkLength = (int) $chunkLength;
|
|
if (!$chunkLength) {
|
|
$chunkLength = 1;
|
|
} else {
|
|
$this->_chunkLength = $chunkLength;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* rangeAroundPage
|
|
*
|
|
* Calculate and returns an array representing the range around the current page
|
|
*
|
|
* @return array
|
|
*/
|
|
public function rangeAroundPage()
|
|
{
|
|
$pager = $this->getPager();
|
|
|
|
if ($pager->getExecuted()) {
|
|
$page = $pager->getPage();
|
|
$pages = $pager->getLastPage();
|
|
|
|
$chunk = $this->getChunkLength();
|
|
|
|
if ($chunk > $pages) {
|
|
$chunk = $pages;
|
|
}
|
|
|
|
$chunkStart = $page - (floor($chunk / 2));
|
|
$chunkEnd = $page + (ceil($chunk / 2)-1);
|
|
|
|
if ($chunkStart < 1) {
|
|
$adjust = 1 - $chunkStart;
|
|
$chunkStart = 1;
|
|
$chunkEnd = $chunkEnd + $adjust;
|
|
}
|
|
|
|
if ($chunkEnd > $pages) {
|
|
$adjust = $chunkEnd - $pages;
|
|
$chunkStart = $chunkStart - $adjust;
|
|
$chunkEnd = $pages;
|
|
}
|
|
|
|
return range($chunkStart, $chunkEnd);
|
|
}
|
|
|
|
throw new Doctrine_Pager_Exception(
|
|
'Cannot retrieve the range around the page of a not yet executed Pager query'
|
|
);
|
|
}
|
|
}
|