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<?php
/**
* @package Joomla.Platform
* @subpackage HTML
*
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Pagination Class. Provides a common interface for content pagination for the
* Joomla! Platform.
*
* @package Joomla.Platform
* @subpackage HTML
* @since 11.1
*/
class JPagination extends JObject
{
/**
* @var integer The record number to start displaying from.
* @since 11.1
*/
public $limitstart = null;
/**
* @var integer Number of rows to display per page.
* @since 11.1
*/
public $limit = null;
/**
* @var integer Total number of rows.
* @since 11.1
*/
public $total = null;
/**
* @var integer Prefix used for request variables.
* @since 11.1
*/
public $prefix = null;
/**
* @var boolean View all flag
* @since 11.1
*/
protected $_viewall = false;
/**
* Additional URL parameters to be added to the pagination URLs generated by the class. These
* may be useful for filters and extra values when dealing with lists and GET requests.
*
* @var array
* @since 11.1
*/
protected $_additionalUrlParams = array();
/**
* Constructor.
*
* @param integer $total The total number of items.
* @param integer $limitstart The offset of the item to start at.
* @param integer $limit The number of items to display per page.
* @param string $prefix The prefix used for request variables.
*
* @since 11.1
*/
public function __construct($total, $limitstart, $limit, $prefix = '')
{
// Value/type checking.
$this->total = (int) $total;
$this->limitstart = (int) max($limitstart, 0);
$this->limit = (int) max($limit, 0);
$this->prefix = $prefix;
if ($this->limit > $this->total)
{
$this->limitstart = 0;
}
if (!$this->limit)
{
$this->limit = $total;
$this->limitstart = 0;
}
/*
* If limitstart is greater than total (i.e. we are asked to display records that don't exist)
* then set limitstart to display the last natural page of results
*/
if ($this->limitstart > $this->total - $this->limit)
{
$this->limitstart = max(0, (int) (ceil($this->total / $this->limit) - 1) * $this->limit);
}
// Set the total pages and current page values.
if ($this->limit > 0)
{
$this->set('pages.total', ceil($this->total / $this->limit));
$this->set('pages.current', ceil(($this->limitstart + 1) / $this->limit));
}
// Set the pagination iteration loop values.
$displayedPages = 10;
$this->set('pages.start', $this->get('pages.current') - ($displayedPages / 2));
if ($this->get('pages.start') < 1)
{
$this->set('pages.start', 1);
}
if (($this->get('pages.start') + $displayedPages) > $this->get('pages.total'))
{
$this->set('pages.stop', $this->get('pages.total'));
if ($this->get('pages.total') < $displayedPages)
{
$this->set('pages.start', 1);
}
else
{
$this->set('pages.start', $this->get('pages.total') - $displayedPages + 1);
}
}
else
{
$this->set('pages.stop', ($this->get('pages.start') + $displayedPages - 1));
}
// If we are viewing all records set the view all flag to true.
if ($limit == 0)
{
$this->_viewall = true;
}
}
/**
* Method to set an additional URL parameter to be added to all pagination class generated
* links.
*
* @param string $key The name of the URL parameter for which to set a value.
* @param mixed $value The value to set for the URL parameter.
*
* @return mixed The old value for the parameter.
*
* @since 11.1
*/
public function setAdditionalUrlParam($key, $value)
{
// Get the old value to return and set the new one for the URL parameter.
$result = isset($this->_additionalUrlParams[$key]) ? $this->_additionalUrlParams[$key] : null;
// If the passed parameter value is null unset the parameter, otherwise set it to the given value.
if ($value === null)
{
unset($this->_additionalUrlParams[$key]);
}
else
{
$this->_additionalUrlParams[$key] = $value;
}
return $result;
}
/**
* Method to get an additional URL parameter (if it exists) to be added to
* all pagination class generated links.
*
* @param string $key The name of the URL parameter for which to get the value.
*
* @return mixed The value if it exists or null if it does not.
*
* @since 11.1
*/
public function getAdditionalUrlParam($key)
{
$result = isset($this->_additionalUrlParams[$key]) ? $this->_additionalUrlParams[$key] : null;
return $result;
}
/**
* Return the rationalised offset for a row with a given index.
*
* @param integer $index The row index
*
* @return integer Rationalised offset for a row with a given index.
*
* @since 11.1
*/
public function getRowOffset($index)
{
return $index + 1 + $this->limitstart;
}
/**
* Return the pagination data object, only creating it if it doesn't already exist.
*
* @return object Pagination data object.
*
* @since 11.1
*/
public function getData()
{
static $data;
if (!is_object($data))
{
$data = $this->_buildDataObject();
}
return $data;
}
/**
* Create and return the pagination pages counter string, ie. Page 2 of 4.
*
* @return string Pagination pages counter string.
*
* @since 11.1
*/
public function getPagesCounter()
{
// Initialise variables.
$html = null;
if ($this->get('pages.total') > 1)
{
$html .= JText::sprintf('JLIB_HTML_PAGE_CURRENT_OF_TOTAL', $this->get('pages.current'), $this->get('pages.total'));
}
return $html;
}
/**
* Create and return the pagination result set counter string, e.g. Results 1-10 of 42
*
* @return string Pagination result set counter string.
*
* @since 11.1
*/
public function getResultsCounter()
{
// Initialise variables.
$html = null;
$fromResult = $this->limitstart + 1;
// If the limit is reached before the end of the list.
if ($this->limitstart + $this->limit < $this->total)
{
$toResult = $this->limitstart + $this->limit;
}
else
{
$toResult = $this->total;
}
// If there are results found.
if ($this->total > 0)
{
$msg = JText::sprintf('JLIB_HTML_RESULTS_OF', $fromResult, $toResult, $this->total);
$html .= "\n" . $msg;
}
else
{
$html .= "\n" . JText::_('JLIB_HTML_NO_RECORDS_FOUND');
}
return $html;
}
/**
* Create and return the pagination page list string, ie. Previous, Next, 1 2 3 ... x.
*
* @return string Pagination page list string.
*
* @since 11.1
*/
public function getPagesLinks()
{
$app = JFactory::getApplication();
// Build the page navigation list.
$data = $this->_buildDataObject();
$list = array();
$list['prefix'] = $this->prefix;
$itemOverride = false;
$listOverride = false;
$chromePath = JPATH_THEMES . '/' . $app->getTemplate() . '/html/pagination.php';
if (file_exists($chromePath))
{
include_once $chromePath;
if (function_exists('pagination_item_active') && function_exists('pagination_item_inactive'))
{
$itemOverride = true;
}
if (function_exists('pagination_list_render'))
{
$listOverride = true;
}
}
// Build the select list
if ($data->all->base !== null)
{
$list['all']['active'] = true;
$list['all']['data'] = ($itemOverride) ? pagination_item_active($data->all) : $this->_item_active($data->all);
}
else
{
$list['all']['active'] = false;
$list['all']['data'] = ($itemOverride) ? pagination_item_inactive($data->all) : $this->_item_inactive($data->all);
}
if ($data->start->base !== null)
{
$list['start']['active'] = true;
$list['start']['data'] = ($itemOverride) ? pagination_item_active($data->start) : $this->_item_active($data->start);
}
else
{
$list['start']['active'] = false;
$list['start']['data'] = ($itemOverride) ? pagination_item_inactive($data->start) : $this->_item_inactive($data->start);
}
if ($data->previous->base !== null)
{
$list['previous']['active'] = true;
$list['previous']['data'] = ($itemOverride) ? pagination_item_active($data->previous) : $this->_item_active($data->previous);
}
else
{
$list['previous']['active'] = false;
$list['previous']['data'] = ($itemOverride) ? pagination_item_inactive($data->previous) : $this->_item_inactive($data->previous);
}
$list['pages'] = array(); //make sure it exists
foreach ($data->pages as $i => $page)
{
if ($page->base !== null)
{
$list['pages'][$i]['active'] = true;
$list['pages'][$i]['data'] = ($itemOverride) ? pagination_item_active($page) : $this->_item_active($page);
}
else
{
$list['pages'][$i]['active'] = false;
$list['pages'][$i]['data'] = ($itemOverride) ? pagination_item_inactive($page) : $this->_item_inactive($page);
}
}
if ($data->next->base !== null)
{
$list['next']['active'] = true;
$list['next']['data'] = ($itemOverride) ? pagination_item_active($data->next) : $this->_item_active($data->next);
}
else
{
$list['next']['active'] = false;
$list['next']['data'] = ($itemOverride) ? pagination_item_inactive($data->next) : $this->_item_inactive($data->next);
}
if ($data->end->base !== null)
{
$list['end']['active'] = true;
$list['end']['data'] = ($itemOverride) ? pagination_item_active($data->end) : $this->_item_active($data->end);
}
else
{
$list['end']['active'] = false;
$list['end']['data'] = ($itemOverride) ? pagination_item_inactive($data->end) : $this->_item_inactive($data->end);
}
if ($this->total > $this->limit)
{
return ($listOverride) ? pagination_list_render($list) : $this->_list_render($list);
}
else
{
return '';
}
}
/**
* Return the pagination footer.
*
* @return string Pagination footer.
*
* @since 11.1
*/
public function getListFooter()
{
$app = JFactory::getApplication();
$list = array();
$list['prefix'] = $this->prefix;
$list['limit'] = $this->limit;
$list['limitstart'] = $this->limitstart;
$list['total'] = $this->total;
$list['limitfield'] = $this->getLimitBox();
$list['pagescounter'] = $this->getPagesCounter();
$list['pageslinks'] = $this->getPagesLinks();
$chromePath = JPATH_THEMES . '/' . $app->getTemplate() . '/html/pagination.php';
if (file_exists($chromePath))
{
include_once $chromePath;
if (function_exists('pagination_list_footer'))
{
return pagination_list_footer($list);
}
}
return $this->_list_footer($list);
}
/**
* Creates a dropdown box for selecting how many records to show per page.
*
* @return string The HTML for the limit # input box.
*
* @since 11.1
*/
public function getLimitBox()
{
$app = JFactory::getApplication();
// Initialise variables.
$limits = array();
// Make the option list.
for ($i = 5; $i <= 30; $i += 5)
{
$limits[] = JHtml::_('select.option', "$i");
}
$limits[] = JHtml::_('select.option', '50', JText::_('J50'));
$limits[] = JHtml::_('select.option', '100', JText::_('J100'));
$limits[] = JHtml::_('select.option', '0', JText::_('JALL'));
$selected = $this->_viewall ? 0 : $this->limit;
// Build the select list.
if ($app->isAdmin())
{
$html = JHtml::_(
'select.genericlist',
$limits,
$this->prefix . 'limit',
'class="inputbox" size="1" onchange="Joomla.submitform();"',
'value',
'text',
$selected
);
}
else
{
$html = JHtml::_(
'select.genericlist',
$limits,
$this->prefix . 'limit',
'class="inputbox" size="1" onchange="this.form.submit()"',
'value',
'text',
$selected
);
}
return $html;
}
/**
* Return the icon to move an item UP.
*
* @param integer $i The row index.
* @param boolean $condition True to show the icon.
* @param string $task The task to fire.
* @param string $alt The image alternative text string.
* @param boolean $enabled An optional setting for access control on the action.
* @param string $checkbox An optional prefix for checkboxes.
*
* @return string Either the icon to move an item up or a space.
*
* @since 11.1
*/
public function orderUpIcon($i, $condition = true, $task = 'orderup', $alt = 'JLIB_HTML_MOVE_UP', $enabled = true, $checkbox = 'cb')
{
if (($i > 0 || ($i + $this->limitstart > 0)) && $condition)
{
return JHtml::_('jgrid.orderUp', $i, $task, '', $alt, $enabled, $checkbox);
}
else
{
return ' ';
}
}
/**
* Return the icon to move an item DOWN.
*
* @param integer $i The row index.
* @param integer $n The number of items in the list.
* @param boolean $condition True to show the icon.
* @param string $task The task to fire.
* @param string $alt The image alternative text string.
* @param boolean $enabled An optional setting for access control on the action.
* @param string $checkbox An optional prefix for checkboxes.
*
* @return string Either the icon to move an item down or a space.
*
* @since 11.1
*/
public function orderDownIcon($i, $n, $condition = true, $task = 'orderdown', $alt = 'JLIB_HTML_MOVE_DOWN', $enabled = true, $checkbox = 'cb')
{
if (($i < $n - 1 || $i + $this->limitstart < $this->total - 1) && $condition)
{
return JHtml::_('jgrid.orderDown', $i, $task, '', $alt, $enabled, $checkbox);
}
else
{
return ' ';
}
}
/**
* Create the HTML for a list footer
*
* @param array $list Pagination list data structure.
*
* @return string HTML for a list footer
*
* @since 11.1
*/
protected function _list_footer($list)
{
$html = "<div class=\"list-footer\">\n";
$html .= "\n<div class=\"limit\">" . JText::_('JGLOBAL_DISPLAY_NUM') . $list['limitfield'] . "</div>";
$html .= $list['pageslinks'];
$html .= "\n<div class=\"counter\">" . $list['pagescounter'] . "</div>";
$html .= "\n<input type=\"hidden\" name=\"" . $list['prefix'] . "limitstart\" value=\"" . $list['limitstart'] . "\" />";
$html .= "\n</div>";
return $html;
}
/**
* Create the html for a list footer
*
* @param array $list Pagination list data structure.
*
* @return string HTML for a list start, previous, next,end
*
* @since 11.1
*/
protected function _list_render($list)
{
// Reverse output rendering for right-to-left display.
$html = '<ul>';
$html .= '<li class="pagination-start">' . $list['start']['data'] . '</li>';
$html .= '<li class="pagination-prev">' . $list['previous']['data'] . '</li>';
foreach ($list['pages'] as $page)
{
$html .= '<li>' . $page['data'] . '</li>';
}
$html .= '<li class="pagination-next">' . $list['next']['data'] . '</li>';
$html .= '<li class="pagination-end">' . $list['end']['data'] . '</li>';
$html .= '</ul>';
return $html;
}
/**
* Method to create an active pagination link to the item
*
* @param JPaginationObject &$item The object with which to make an active link.
*
* @return string HTML link
*
* @since 11.1
*/
protected function _item_active(&$item)
{
$app = JFactory::getApplication();
if ($app->isAdmin())
{
if ($item->base > 0)
{
return "<a title=\"" . $item->text . "\" onclick=\"document.adminForm." . $this->prefix . "limitstart.value=" . $item->base
. "; Joomla.submitform();return false;\">" . $item->text . "</a>";
}
else
{
return "<a title=\"" . $item->text . "\" onclick=\"document.adminForm." . $this->prefix
. "limitstart.value=0; Joomla.submitform();return false;\">" . $item->text . "</a>";
}
}
else
{
return "<a title=\"" . $item->text . "\" href=\"" . $item->link . "\" class=\"pagenav\">" . $item->text . "</a>";
}
}
/**
* Method to create an inactive pagination string
*
* @param object &$item The item to be processed
*
* @return string
*
* @since 11.1
*/
protected function _item_inactive(&$item)
{
$app = JFactory::getApplication();
if ($app->isAdmin())
{
return "<span>" . $item->text . "</span>";
}
else
{
return "<span class=\"pagenav\">" . $item->text . "</span>";
}
}
/**
* Create and return the pagination data object.
*
* @return object Pagination data object.
*
* @since 11.1
*/
protected function _buildDataObject()
{
// Initialise variables.
$data = new stdClass;
// 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::_('JLIB_HTML_START'), $this->prefix);
$data->previous = new JPaginationObject(JText::_('JPREV'), $this->prefix);
if ($this->get('pages.current') > 1)
{
$page = ($this->get('pages.current') - 2) * $this->limit;
// Set the empty for removal from route
//$page = $page == 0 ? '' : $page;
$data->start->base = '0';
$data->start->link = JRoute::_($params . '&' . $this->prefix . 'limitstart=0');
$data->previous->base = $page;
$data->previous->link = JRoute::_($params . '&' . $this->prefix . 'limitstart=' . $page);
}
// Set the next and end data objects.
$data->next = new JPaginationObject(JText::_('JNEXT'), $this->prefix);
$data->end = new JPaginationObject(JText::_('JLIB_HTML_END'), $this->prefix);
if ($this->get('pages.current') < $this->get('pages.total'))
{
$next = $this->get('pages.current') * $this->limit;
$end = ($this->get('pages.total') - 1) * $this->limit;
$data->next->base = $next;
$data->next->link = JRoute::_($params . '&' . $this->prefix . 'limitstart=' . $next);
$data->end->base = $end;
$data->end->link = JRoute::_($params . '&' . $this->prefix . 'limitstart=' . $end);
}
$data->pages = array();
$stop = $this->get('pages.stop');
for ($i = $this->get('pages.start'); $i <= $stop; $i++)
{
$offset = ($i - 1) * $this->limit;
// Set the empty for removal from route
//$offset = $offset == 0 ? '' : $offset;
$data->pages[$i] = new JPaginationObject($i, $this->prefix);
if ($i != $this->get('pages.current') || $this->_viewall)
{
$data->pages[$i]->base = $offset;
$data->pages[$i]->link = JRoute::_($params . '&' . $this->prefix . 'limitstart=' . $offset);
}
}
return $data;
}
}
/**
* Pagination object representing a particular item in the pagination lists.
*
* @package Joomla.Platform
* @subpackage HTML
* @since 11.1
*/
class JPaginationObject extends JObject
{
/**
* @var string The link text.
* @since 11.1
*/
public $text;
/**
* @var integer The number of rows as a base offset.
* @since 11.1
*/
public $base;
/**
* @var string The link URL.
* @since 11.1
*/
public $link;
/**
* @var integer The prefix used for request variables.
* @since 11.1
*/
public $prefix;
/**
* Class constructor.
*
* @param string $text The link text.
* @param integer $prefix The prefix used for request variables.
* @param integer $base The number of rows as a base offset.
* @param string $link The link URL.
*
* @since 11.1
*/
public function __construct($text, $prefix = '', $base = null, $link = null)
{
$this->text = $text;
$this->prefix = $prefix;
$this->base = $base;
$this->link = $link;
}
}
