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<?php
// $HeadURL: https://joomgallery.org/svn/joomgallery/JG-2.0/JG/trunk/administrator/components/com_joomgallery/helpers/pagination.php $
// $Id: pagination.php 3678 2012-03-04 15:20:22Z erftralle $
/****************************************************************************************\
** JoomGallery 2 **
** By: JoomGallery::ProjectTeam **
** Copyright (C) 2008 - 2012 JoomGallery::ProjectTeam **
** Based on: JoomGallery 1.0.0 by JoomGallery::ProjectTeam **
** Released under GNU GPL Public License **
** License: http://www.gnu.org/copyleft/gpl.html or have a look **
** at administrator/components/com_joomgallery/LICENSE.TXT **
\****************************************************************************************/
defined('_JEXEC') or die('Direct Access to this location is not allowed.');
jimport('joomla.html.pagination');
/**
* Pagination Class. Provides a common interface for content pagination
* for JoomGallery (extends the pagination class of Joomla!)
*
* @package JoomGallery
* @since 2.0
*/
class JoomPagination extends JPagination
{
/**
* Holds the anchor for URLs if it is enabled
*
* @var string
* @since 2.0
*/
protected $anchortag;
/**
* Holds the 'onlick' attribute if there is one given
*
* @var string
* @since 2.0
*/
protected $onclick;
/**
* Internal cache for the data object
*
* @var object
* @since 2.0
*/
protected $store;
/**
* Constructor
*
* @param int $total The total number of items
* @param int $limitstart The offset of the item to start at
* @param int $limit The number of items to display per page
* @param string $prefix The prefix used for request variables
* @param string $anchortag The anchor to use for the URLs
* @param string $onclick The contents of an optional 'onlick' attribute
* @return void
* @since 2.0
*/
public function __construct($total, $limitstart, $limit, $prefix = '', $anchortag = 'category', $onclick = null)
{
parent::__construct($total, $limitstart, $limit, $prefix);
$this->anchortag = '';
if($anchortag)
{
$this->anchortag = JHtml::_('joomgallery.anchor', $anchortag);
}
if($onclick)
{
$this->onclick = '" onclick="'.$onclick;
}
}
/**
* Create and return the pagination data object
*
* @return object Pagination data object
* @since 2.0
*/
protected function _buildDataObject()
{
// Check whether the data object was already created
if(!empty($this->store))
{
return $this->store;
}
// Initialise variables
$data = new stdClass;
$currentPage = $this->get('pages.current');
$pageCount = $this->get('pages.total');
// Build the additional URL parameters string
$params = '';
if(!empty($this->_additionalUrlParams))
{
foreach($this->_additionalUrlParams as $key => $value)
{
$params .= '&'.$key.'='.$value;
}
}
$data->all = new JPaginationObject(JText::_('JLIB_HTML_VIEW_ALL'), $this->prefix);
if(!$this->_viewall)
{
$data->all->base = '0';
$data->all->link = JRoute::_($params.'&'.$this->prefix.'limitstart=');
}
// Set the start and previous data objects
$data->start = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_BEGIN'), $this->prefix);
$data->previous = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_PREVIOUS'), $this->prefix);
if($currentPage > 1)
{
$previous = $currentPage - 1;
$data->start->base = 1;
$data->start->link = JRoute::_($params.'&'.$this->prefix.'page=1').$this->anchortag.sprintf($this->onclick, 1);
$data->previous->base = $previous;
$data->previous->link = JRoute::_($params.'&'.$this->prefix.'page='.$previous).$this->anchortag.sprintf($this->onclick, $previous);
}
// Set the next and end data objects
$data->next = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_NEXT'), $this->prefix);
$data->end = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_END'), $this->prefix);
if($currentPage < $pageCount)
{
$next = $currentPage + 1;
$data->next->base = $next;
$data->next->link = JRoute::_($params.'&'.$this->prefix.'page='.$next).$this->anchortag.sprintf($this->onclick, $next);
$data->end->base = $pageCount;
$data->end->link = JRoute::_($params.'&'.$this->prefix.'page='.$pageCount).$this->anchortag.sprintf($this->onclick, $pageCount);
}
$data->pages = array();
$workPage = 2;
$placeHolderKey = $pageCount;
// Variable for current page found and assembled
$currItemfound = false;
// Work on left edge
if($currentPage == 1)
{
$currItemfound = true;
$data->pages[1] = new JPaginationObject(1, $this->prefix);
$data->pages[1]->base = null;
$data->pages[1]->link = JRoute::_($params.'&'.$this->prefix.'page=1').$this->anchortag.sprintf($this->onclick, 1);
$data->pages[2] = new JPaginationObject(2, $this->prefix);
$data->pages[2]->base = 2;
$data->pages[2]->link = JRoute::_($params.'&'.$this->prefix.'page=2').$this->anchortag.sprintf($this->onclick, 2);
}
else
{
// Current page not 1
$data->pages[1] = new JPaginationObject(1, $this->prefix);
$data->pages[1]->base = 1;
$data->pages[1]->link = JRoute::_($params.'&'.$this->prefix.'page=1').$this->anchortag.sprintf($this->onclick, 1);
if($currentPage == 2)
{
$currItemfound = true;
$data->pages[2] = new JPaginationObject(2, $this->prefix);
$data->pages[2]->base = null;
$data->pages[2]->link = JRoute::_($params.'&'.$this->prefix.'page=2').$this->anchortag.sprintf($this->onclick, 2);
}
else
{
$data->pages[2] = new JPaginationObject(2, $this->prefix);
$data->pages[2]->base = 2;
$data->pages[2]->link = JRoute::_($params.'&'.$this->prefix.'page=2').$this->anchortag.sprintf($this->onclick, 2);
}
}
// Range left from current page to 1 not assembled yet
if(!$currItemfound)
{
// Construct pages left to current page
// according to difference to left implement jumps
// If difference to current page too low, output them exactly
if($currentPage - $workPage < 6)
{
$workPage++;
for($i = $workPage; $i < $currentPage; $i++)
{
$data->pages[$i] = new JPaginationObject($i, $this->prefix);
$data->pages[$i]->base = $i;
$data->pages[$i]->link = JRoute::_($params.'&'.$this->prefix.'page='.$i).$this->anchortag.sprintf($this->onclick, $i);
$workPage++;
}
}
else
{
// Otherwise output of remaining links evt. in steps
// and in addition output of 2 left neighbours
// completion of range at position 3 to (current page - 3)
$endRange = $currentPage - 3;
$jump = ceil(($endRange - 5) / 4);
if($jump == 0)
{
$jump = 1;
}
$workPage = $workPage + $jump;
for($i = 1; $i < 4; $i++)
{
if($jump != 1)
{
$placeHolderKey++;
$data->pages[$placeHolderKey] = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_ELLIPSIS'), $this->prefix);
$data->pages[$placeHolderKey]->base = null;
}
$data->pages[$workPage] = new JPaginationObject($workPage, $this->prefix);
$data->pages[$workPage]->base = $workPage;
$data->pages[$workPage]->link = JRoute::_($params.'&'.$this->prefix.'page='.$workPage).$this->anchortag.sprintf($this->onclick, $workPage);
$workPage = $workPage + $jump;
}
if($workPage != ($currentPage - 2))
{
$placeHolderKey++;
$data->pages[$placeHolderKey] = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_ELLIPSIS'), $this->prefix);
$data->pages[$placeHolderKey]->base = null;
}
// Output of 2 pages left beside current page
$data->pages[$currentPage - 2] = new JPaginationObject($currentPage - 2, $this->prefix);
$data->pages[$currentPage - 2]->base = $currentPage - 2;
$data->pages[$currentPage - 2]->link = JRoute::_($params.'&'.$this->prefix.'page='.($currentPage - 2)).$this->anchortag.sprintf($this->onclick, $currentPage - 2);
$data->pages[$currentPage - 1] = new JPaginationObject($currentPage - 1, $this->prefix);
$data->pages[$currentPage - 1]->base = $currentPage - 1;
$data->pages[$currentPage - 1]->link = JRoute::_($params.'&'.$this->prefix.'page='.($currentPage - 1)).$this->anchortag.sprintf($this->onclick, $currentPage - 1);
}
// Current page
$data->pages[$currentPage] = new JPaginationObject($currentPage, $this->prefix);
$data->pages[$currentPage]->base = null;
$data->pages[$currentPage]->link = JRoute::_($params.'&'.$this->prefix.'page='.$currentPage).$this->anchortag.sprintf($this->onclick, $currentPage);
$currItemfound = true;
$workPage = $currentPage;
}
// Current page found, right beside construct 2 pages
// max to end
if($pageCount - $workPage < 3)
{
$endRangecount = $pageCount - $workPage;
}
else
{
$endRangecount = 2;
}
$workPage++;
for($i = 1; $i <= $endRangecount; $i++)
{
$data->pages[$workPage] = new JPaginationObject($workPage, $this->prefix);
$data->pages[$workPage]->base = $workPage;
$data->pages[$workPage]->link = JRoute::_($params.'&'.$this->prefix.'page='.$workPage).$this->anchortag.sprintf($this->onclick, $workPage);
$workPage++;
}
if($workPage == $pageCount)
{
$data->pages[$workPage] = new JPaginationObject($workPage, $this->prefix);
$data->pages[$workPage]->base = $workPage;
$data->pages[$workPage]->link = JRoute::_($params.'&'.$this->prefix.'page='.$workPage).$this->anchortag.sprintf($this->onclick, $workPage);
$this->store = $data;
return $data;
}
// All ready
if($workPage > $pageCount)
{
$this->store = $data;
return $data;
}
// If only 3 pages to end remain
if($workPage < $pageCount && ($pageCount - $workPage) < 7)
{
for($i = $workPage; $i <= $pageCount; $i++)
{
$data->pages[$workPage] = new JPaginationObject($workPage, $this->prefix);
$data->pages[$workPage]->base = $workPage;
$data->pages[$workPage]->link = JRoute::_($params.'&'.$this->prefix.'page='.$workPage).$this->anchortag.sprintf($this->onclick, $workPage);
$workPage++;
}
}
else
{
// Output of remaining pages in steps
// and in addition output of last page and the neighbour left
// Complete the range (current page + 3) to (last page - 3)
$startRange = $workPage;
$endRange = $pageCount - 3;
$jump = ceil(($endRange - $startRange) / 4);
$workPage = $workPage + $jump;
for($i = 1; $i < 4; $i++)
{
if($jump != 1)
{
$placeHolderKey++;
$data->pages[$placeHolderKey] = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_ELLIPSIS'), $this->prefix);
$data->pages[$placeHolderKey]->base = null;
}
$data->pages[$workPage] = new JPaginationObject($workPage, $this->prefix);
$data->pages[$workPage]->base = $workPage;
$data->pages[$workPage]->link = JRoute::_($params.'&'.$this->prefix.'page='.$workPage).$this->anchortag.sprintf($this->onclick, $workPage);
$workPage = $workPage + $jump;
}
$placeHolderKey++;
$data->pages[$placeHolderKey] = new JPaginationObject(JText::_('COM_JOOMGALLERY_COMMON_PAGENAVIGATION_ELLIPSIS'), $this->prefix);
$data->pages[$placeHolderKey]->base = null;
// Output of penultimate and last
$data->pages[$pageCount - 1] = new JPaginationObject($pageCount - 1, $this->prefix);
$data->pages[$pageCount - 1]->base = $pageCount - 1;
$data->pages[$pageCount - 1]->link = JRoute::_($params.'&'.$this->prefix.'page='.($pageCount - 1)).$this->anchortag.sprintf($this->onclick, $pageCount - 1);
$data->pages[$pageCount] = new JPaginationObject($pageCount, $this->prefix);
$data->pages[$pageCount]->base = $pageCount;
$data->pages[$pageCount]->link = JRoute::_($params.'&'.$this->prefix.'page='.$pageCount).$this->anchortag.sprintf($this->onclick, $pageCount);
}
$this->store = $data;
return $data;
}
}
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