silverstripe-framework/forms/gridfield/GridFieldPaginator.php

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<?php
/**
* GridFieldPaginator decorates the GridFieldPresenter with the possibility to
* paginate the GridField.
*
* @see GridField
*
* @package sapphire
* @subpackage fields-relational
*/
class GridFieldPaginator implements GridField_HTMLProvider, GridField_DataManipulator, GridField_ActionProvider {
protected $currentPage = 1;
protected $itemsPerPage = 25;
/**
* Which template to use for rendering
*
* @var string $itemClass
*/
protected $itemClass = 'GridFieldPaginator_Row';
public function __construct($itemsPerPage=25) {
$this->itemsPerPage = $itemsPerPage;
}
public function getActions($gridField) {
return array('paginate');
}
public function handleAction(GridField $gridField, $actionName, $arguments, $data) {
if($actionName !== 'paginate') {
return;
}
$state = $gridField->State->GridFieldPaginator;
$this->currentPage = $state->currentPage = (int)$arguments;
}
/** Duck check to see if list support methods we need to paginate */
protected function getListPaginatable(SS_List $list) {
// If no list yet, not paginatable
if (!$list) return false;
// Check for methods we use
if(!method_exists($list, 'getRange')) return false;
if(!method_exists($list, 'limit')) return false;
// Default it true
return true;
}
public function getManipulatedData(GridField $gridField, SS_List $dataList) {
if(!$this->getListPaginatable($dataList)) {
return $dataList;
}
if(!$this->currentPage) {
return $dataList->getRange(0, (int)$this->itemsPerPage);
}
$startRow = $this->itemsPerPage*($this->currentPage-1);
return $dataList->getRange((int)$startRow, (int)$this->itemsPerPage);
}
public function getHTMLFragments($gridField) {
Requirements::javascript(SAPPHIRE_DIR.'/thirdparty/jquery-entwine/dist/jquery.entwine-dist.js');
Requirements::javascript(SAPPHIRE_DIR.'/javascript/GridField.js');
$forTemplate = new ArrayData(array());
$forTemplate->Fields = new ArrayList;
$countList = clone $gridField->List;
$totalRows = $countList->limit(null)->count();
$totalPages = ceil($totalRows/$this->itemsPerPage);
for($idx=1; $idx<=$totalPages; $idx++) {
if($idx == $this->currentPage) {
$field = new LiteralField('pagination_'.$idx, $idx);
} else {
$field = new GridField_Action($gridField, 'pagination_'.$idx, $idx, 'paginate', $idx);
$field->addExtraClass('ss-gridfield-button');
}
$forTemplate->Fields->push($field);
}
if(!$forTemplate->Fields->Count()) {
return array();
}
return array(
'footer' => $forTemplate->renderWith('GridFieldPaginator_Row', array('Colspan'=>count($gridField->getColumns()))),
);
}
}