458 lines
14 KiB
PHP
458 lines
14 KiB
PHP
<?php
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namespace Symbiote\GridFieldExtensions;
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use Exception;
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use SilverStripe\Core\Config\Configurable;
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use SilverStripe\Forms\GridField\GridField;
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use SilverStripe\Forms\GridField\GridField_FormAction;
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use SilverStripe\Forms\GridField\GridFieldPaginator;
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use SilverStripe\Forms\GridField\GridState_Data;
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use SilverStripe\ORM\ArrayList;
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use SilverStripe\ORM\Limitable;
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use SilverStripe\ORM\SS_List;
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use SilverStripe\ORM\UnsavedRelationList;
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use SilverStripe\View\ArrayData;
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/**
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* GridFieldConfigurablePaginator paginates the {@link GridField} list and adds controls to the bottom of
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* the {@link GridField}. The page sizes are configurable.
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*/
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class GridFieldConfigurablePaginator extends GridFieldPaginator
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{
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use Configurable;
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/**
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* Specifies default page sizes
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*
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* @config
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* @var int
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*/
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private static $default_page_sizes = array(15, 30, 60);
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/**
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* @var GridField
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*/
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protected $gridField;
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/**
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* @var GridState_Data
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*/
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protected $gridFieldState;
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/**
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* @var int[]
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*/
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protected $pageSizes = array();
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/**
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* @param int $itemsPerPage How many items should be displayed per page
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* @param int $pageSizes The page sizes to show in the dropdown
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*/
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public function __construct($itemsPerPage = null, $pageSizes = null)
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{
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$this->setPageSizes($pageSizes ?: $this->config()->get('default_page_sizes'));
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if (!$itemsPerPage) {
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$itemsPerPage = $this->pageSizes[0];
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}
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parent::__construct($itemsPerPage);
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}
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/**
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* Get the total number of records in the list
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*
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* @return int
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*/
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public function getTotalRecords()
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{
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return (int) $this->getGridField()->getList()->count();
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}
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/**
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* Get the first shown record number
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*
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* @return int
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*/
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public function getFirstShown()
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{
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$firstShown = $this->getGridPagerState()->firstShown ?: 1;
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// Prevent visiting a page with an offset higher than the total number of items
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if ($firstShown > $this->getTotalRecords()) {
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$this->getGridPagerState()->firstShown = $firstShown = 1;
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}
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return $firstShown;
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}
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/**
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* Set the first shown record number. Will be stored in the state.
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*
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* @param int $firstShown
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* @return $this
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*/
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public function setFirstShown($firstShown = 1)
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{
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$this->getGridPagerState()->firstShown = (int) $firstShown;
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return $this;
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}
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/**
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* Get the last shown record number
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*
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* @return int
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*/
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public function getLastShown()
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{
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return min($this->getTotalRecords(), $this->getFirstShown() + $this->getItemsPerPage() - 1);
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}
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/**
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* Get the total number of pages, given the current number of items per page. The total
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* pages might be higher than <totalitems> / <itemsperpage> if the first shown record
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* is half way through a standard page break point.
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*
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* @return int
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*/
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public function getTotalPages()
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{
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// Pages before
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$pages = ceil(($this->getFirstShown() - 1) / $this->getItemsPerPage());
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// Current page
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$pages++;
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// Pages after
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$pages += ceil(($this->getTotalRecords() - $this->getLastShown()) / $this->getItemsPerPage());
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return (int) $pages;
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}
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/**
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* Get the page currently active. This is calculated by adding one to the previous number
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* of pages calculated via the "first shown record" position.
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*
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* @return int
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*/
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public function getCurrentPage()
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{
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return (int) ceil(($this->getFirstShown() - 1) / $this->getItemsPerPage()) + 1;
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}
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/**
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* Get the next page number
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*
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* @return int
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*/
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public function getNextPage()
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{
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return min($this->getTotalPages(), $this->getCurrentPage() + 1);
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}
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/**
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* Get the previous page number
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*
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* @return int
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*/
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public function getPreviousPage()
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{
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return max(1, $this->getCurrentPage() - 1);
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}
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/**
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* Set the page sizes to use in the "Show x" dropdown
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*
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* @param array $pageSizes
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* @return $this
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*/
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public function setPageSizes(array $pageSizes)
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{
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$this->pageSizes = $pageSizes;
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// Reset items per page
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$this->setItemsPerPage(current($pageSizes ?? []));
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return $this;
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}
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/**
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* Get the sizes for the "Show x" dropdown
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*
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* @return array
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*/
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public function getPageSizes()
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{
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return $this->pageSizes;
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}
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/**
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* Gets a list of page sizes for use in templates as a dropdown
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*
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* @return ArrayList
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*/
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public function getPageSizesAsList()
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{
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$pageSizes = ArrayList::create();
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$perPage = $this->getItemsPerPage();
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foreach ($this->getPageSizes() as $pageSize) {
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$pageSizes->push(array(
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'Size' => $pageSize,
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'Selected' => $pageSize == $perPage
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));
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}
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return $pageSizes;
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}
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/**
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* Get the GridField used in this request
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*
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* @return GridField
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* @throws Exception If the GridField has not been previously set
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*/
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public function getGridField()
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{
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if ($this->gridField) {
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return $this->gridField;
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}
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throw new Exception('No GridField available yet for this request!');
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}
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/**
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* Set the GridField so it can be used in other parts of the component during this request
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*
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* @param GridField $gridField
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* @return $this
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*/
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public function setGridField(GridField $gridField)
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{
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$this->gridField = $gridField;
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return $this;
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}
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public function handleAction(GridField $gridField, $actionName, $arguments, $data)
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{
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$this->setGridField($gridField);
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if ($actionName !== 'paginate') {
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return;
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}
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$state = $this->getGridPagerState();
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$state->firstShown = (int) $arguments['first-shown'];
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$state->pageSize = $data[$gridField->getName()]['page-sizes'];
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$this->setItemsPerPage($state->pageSize);
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}
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public function getManipulatedData(GridField $gridField, SS_List $dataList)
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{
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// Assign the GridField to the class so it can be used later in the request
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$this->setGridField($gridField);
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// Retain page sizes during actions provided by other components
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$state = $this->getGridPagerState();
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if (is_numeric($state->pageSize)) {
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$this->setItemsPerPage($state->pageSize);
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}
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if (!($dataList instanceof Limitable) || ($dataList instanceof UnsavedRelationList)) {
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return $dataList;
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}
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return $dataList->limit($this->getItemsPerPage(), $this->getFirstShown() - 1);
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}
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/**
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* Add the configurable page size options to the template data
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*
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* {@inheritDoc}
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*
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* @param GridField $gridField
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* @return ArrayData|null
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*/
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public function getTemplateParameters(GridField $gridField)
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{
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$state = $this->getGridPagerState();
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if (is_numeric($state->pageSize)) {
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$this->setItemsPerPage($state->pageSize);
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}
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$arguments = $this->getPagerArguments();
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// Figure out which page and record range we're on
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if (!$arguments['total-rows']) {
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return null;
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}
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// Define a list of the FormActions that should be generated for pager controls (see getPagerActions())
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$controls = array(
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'first' => array(
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'title' => 'First',
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'args' => array('first-shown' => 1),
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'extra-class' => 'btn btn-secondary btn--hide-text btn-sm font-icon-angle-double-left '
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. 'ss-gridfield-pagination-action ss-gridfield-firstpage',
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'disable-previous' => ($this->getCurrentPage() == 1)
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),
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'prev' => array(
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'title' => 'Previous',
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'args' => array('first-shown' => $arguments['first-shown'] - $this->getItemsPerPage()),
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'extra-class' => 'btn btn-secondary btn--hide-text btn-sm font-icon-angle-left '
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. 'ss-gridfield-pagination-action ss-gridfield-previouspage',
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'disable-previous' => ($this->getCurrentPage() == 1)
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),
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'next' => array(
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'title' => 'Next',
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'args' => array('first-shown' => $arguments['first-shown'] + $this->getItemsPerPage()),
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'extra-class' => 'btn btn-secondary btn--hide-text btn-sm font-icon-angle-right '
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.'ss-gridfield-pagination-action ss-gridfield-nextpage',
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'disable-next' => ($this->getCurrentPage() == $arguments['total-pages'])
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),
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'last' => array(
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'title' => 'Last',
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'args' => array('first-shown' => ($this->getTotalPages() - 1) * $this->getItemsPerPage() + 1),
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'extra-class' => 'btn btn-secondary btn--hide-text btn-sm font-icon-angle-double-right '
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. 'ss-gridfield-pagination-action ss-gridfield-lastpage',
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'disable-next' => ($this->getCurrentPage() == $arguments['total-pages'])
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),
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'pagesize' => array(
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'title' => 'Page Size',
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'args' => array('first-shown' => $arguments['first-shown']),
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'extra-class' => 'ss-gridfield-pagination-action ss-gridfield-pagesize-submit'
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),
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);
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if ($controls['prev']['args']['first-shown'] < 1) {
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$controls['prev']['args']['first-shown'] = 1;
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}
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$actions = $this->getPagerActions($controls, $gridField);
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// Render in template
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return ArrayData::create(array(
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'OnlyOnePage' => ($arguments['total-pages'] == 1),
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'FirstPage' => $actions['first'],
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'PreviousPage' => $actions['prev'],
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'NextPage' => $actions['next'],
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'LastPage' => $actions['last'],
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'PageSizesSubmit' => $actions['pagesize'],
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'CurrentPageNum' => $this->getCurrentPage(),
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'NumPages' => $arguments['total-pages'],
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'FirstShownRecord' => $arguments['first-shown'],
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'LastShownRecord' => $arguments['last-shown'],
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'NumRecords' => $arguments['total-rows'],
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'PageSizes' => $this->getPageSizesAsList(),
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'PageSizesName' => $gridField->getName() . '[page-sizes]',
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));
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}
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public function getHTMLFragments($gridField)
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{
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GridFieldExtensions::include_requirements();
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$gridField->addExtraClass('ss-gridfield-configurable-paginator');
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$forTemplate = $this->getTemplateParameters($gridField);
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if ($forTemplate) {
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return array(
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'footer' => $forTemplate->renderWith(
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__CLASS__,
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array('Colspan' => count($gridField->getColumns() ?? []))
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)
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);
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}
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}
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/**
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* Returns an array containing the arguments for the pagination: total rows, pages, first record etc
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*
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* @return array
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*/
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protected function getPagerArguments()
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{
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return array(
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'total-rows' => $this->getTotalRecords(),
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'total-pages' => $this->getTotalPages(),
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'items-per-page' => $this->getItemsPerPage(),
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'first-shown' => $this->getFirstShown(),
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'last-shown' => $this->getLastShown(),
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);
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}
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/**
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* Returns FormActions for each of the pagination actions, in an array
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*
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* @param array $controls
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* @param GridField $gridField
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* @return GridField_FormAction[]
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*/
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public function getPagerActions(array $controls, GridField $gridField)
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{
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$actions = array();
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foreach ($controls as $key => $arguments) {
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$action = GridField_FormAction::create(
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$gridField,
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'pagination_' . $key,
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$arguments['title'],
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'paginate',
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$arguments['args']
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);
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if (isset($arguments['extra-class'])) {
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$action->addExtraClass($arguments['extra-class']);
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}
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if (isset($arguments['disable-previous']) && $arguments['disable-previous']) {
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$action = $action->performDisabledTransformation();
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} elseif (isset($arguments['disable-next']) && $arguments['disable-next']) {
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$action = $action->performDisabledTransformation();
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}
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$actions[$key] = $action;
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}
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return $actions;
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}
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public function getActions($gridField)
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{
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return array('paginate');
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}
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/**
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* Gets the state from the current request's GridField and sets some default values on it
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*
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* @param GridField $gridField Not used, but present for parent method compatibility
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* @return GridState_Data
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*/
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protected function getGridPagerState(GridField $gridField = null)
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{
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if (!$this->gridFieldState) {
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$state = $this->getGridField()->State->GridFieldConfigurablePaginator;
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// SS 3.1 compatibility (missing __call)
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if (is_object($state->firstShown)) {
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$state->firstShown = 1;
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}
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if (is_object($state->pageSize)) {
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$state->pageSize = $this->getItemsPerPage();
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}
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// Handle free input in the page number field
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$parentState = $this->getGridField()->State->GridFieldPaginator;
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if (is_object($parentState->currentPage)) {
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$parentState->currentPage = 0;
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}
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if ($parentState->currentPage >= 1) {
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$state->firstShown = ($parentState->currentPage - 1) * $this->getItemsPerPage() + 1;
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$parentState->currentPage = null;
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}
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$this->gridFieldState = $state;
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}
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return $this->gridFieldState;
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}
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}
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