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Diffstat (limited to 'vendor/ipl/web/src/Control/PaginationControl.php')
| -rw-r--r-- | vendor/ipl/web/src/Control/PaginationControl.php | 523 |
1 files changed, 523 insertions, 0 deletions
diff --git a/vendor/ipl/web/src/Control/PaginationControl.php b/vendor/ipl/web/src/Control/PaginationControl.php new file mode 100644 index 0000000..00f5c20 --- /dev/null +++ b/vendor/ipl/web/src/Control/PaginationControl.php @@ -0,0 +1,523 @@ +<?php + +namespace ipl\Web\Control; + +use ipl\Html\BaseHtmlElement; +use ipl\Html\Html; +use ipl\Stdlib\Contract\Paginatable; +use ipl\Web\Compat\CompatForm; +use ipl\Web\Url; +use ipl\Web\Widget\Icon; + +/** + * The pagination control displays a list of links that point to different pages of the current view + * + * The default HTML markup (tag and attributes) for the paginator look like the following: + * <div class="pagination-control" role="navigation">...</div> + */ +class PaginationControl extends BaseHtmlElement +{ + /** @var int Default maximum number of items which should be shown per page */ + protected $defaultPageSize; + + /** @var string Name of the URL parameter which stores the current page number */ + protected $pageParam = 'page'; + + /** @var string Name of the URL parameter which holds the page size. If given, overrides {@link $defaultPageSize} */ + protected $pageSizeParam = 'limit'; + + /** @var string */ + protected $pageSpacer = '…'; + + /** @var Paginatable The pagination adapter which handles the underlying data source */ + protected $paginatable; + + /** @var Url The URL to base off pagination URLs */ + protected $url; + + /** @var int Cache for the total number of items */ + private $totalCount; + + protected $tag = 'div'; + + protected $defaultAttributes = [ + 'class' => 'pagination-control', + 'role' => 'navigation' + ]; + + /** + * Create a pagination control + * + * @param Paginatable $paginatable The paginatable + * @param Url $url The URL to base off paging URLs + */ + public function __construct(Paginatable $paginatable, Url $url) + { + $this->paginatable = $paginatable; + $this->url = $url; + } + + /** + * Set the URL to base off paging URLs + * + * @param Url $url + * + * @return $this + */ + public function setUrl(Url $url) + { + $this->url = $url; + + return $this; + } + + /** + * Get the default page size + * + * @return int + */ + public function getDefaultPageSize() + { + return $this->defaultPageSize ?: LimitControl::DEFAULT_LIMIT; + } + + /** + * Set the default page size + * + * @param int $defaultPageSize + * + * @return $this + */ + public function setDefaultPageSize($defaultPageSize) + { + $this->defaultPageSize = $defaultPageSize; + + return $this; + } + + /** + * Get the name of the URL parameter which stores the current page number + * + * @return string + */ + public function getPageParam() + { + return $this->pageParam; + } + + /** + * Set the name of the URL parameter which stores the current page number + * + * @param string $pageParam + * + * @return $this + */ + public function setPageParam($pageParam) + { + $this->pageParam = $pageParam; + + return $this; + } + + /** + * Get the name of the URL parameter which stores the page size + * + * @return string + */ + public function getPageSizeParam() + { + return $this->pageSizeParam; + } + /** + * Set the name of the URL parameter which stores the page size + * + * @param string $pageSizeParam + * + * @return $this + */ + public function setPageSizeParam($pageSizeParam) + { + $this->pageSizeParam = $pageSizeParam; + + return $this; + } + + /** + * Get the total number of items + * + * @return int + */ + public function getTotalCount() + { + if ($this->totalCount === null) { + $this->totalCount = $this->paginatable->count(); + } + + return $this->totalCount; + } + + /** + * Get the current page number + * + * @return int + */ + public function getCurrentPageNumber() + { + return (int) $this->url->getParam($this->pageParam, 1); + } + + /** + * Get the configured page size + * + * @return int + */ + public function getPageSize() + { + return (int) $this->url->getParam($this->pageSizeParam, $this->getDefaultPageSize()); + } + + /** + * Get the total page count + * + * @return int + */ + public function getPageCount() + { + $pageSize = $this->getPageSize(); + + if ($pageSize === 0) { + return 0; + } + + if ($pageSize < 0) { + return 1; + } + + return (int) ceil($this->getTotalCount() / $pageSize); + } + + /** + * Get the limit + * + * Use this method to set the LIMIT part of a query for fetching the current page. + * + * @return int If the page size is infinite, -1 will be returned + */ + public function getLimit() + { + $pageSize = $this->getPageSize(); + + return $pageSize < 0 ? -1 : $pageSize; + } + + /** + * Get the offset + * + * Use this method to set the OFFSET part of a query for fetching the current page. + * + * @return int + */ + public function getOffset() + { + $currentPageNumber = $this->getCurrentPageNumber(); + $pageSize = $this->getPageSize(); + + return $currentPageNumber <= 1 ? 0 : ($currentPageNumber - 1) * $pageSize; + } + + /** + * Apply limit and offset on the paginatable + * + * @return $this + */ + public function apply() + { + $this->paginatable->limit($this->getLimit()); + $this->paginatable->offset($this->getOffset()); + + return $this; + } + + /** + * Create a URL for paging from the given page number + * + * @param int $pageNumber The page number + * @param int $pageSize The number of items per page. If you want to stick to the defaults, + * don't set this parameter + * + * @return Url + */ + public function createUrl($pageNumber, $pageSize = null) + { + $params = [$this->getPageParam() => $pageNumber]; + + if ($pageSize !== null) { + $params[$this->getPageSizeParam()] = $pageSize; + } + + return $this->url->with($params); + } + + /** + * Get the first item number of the given page + * + * @param int $pageNumber + * + * @return int + */ + protected function getFirstItemNumberOfPage($pageNumber) + { + return ($pageNumber - 1) * $this->getPageSize() + 1; + } + + /** + * Get the last item number of the given page + * + * @param int $pageNumber + * + * @return int + */ + protected function getLastItemNumberOfPage($pageNumber) + { + return min($pageNumber * $this->getPageSize(), $this->getTotalCount()); + } + + /** + * Create the label for the given page number + * + * @param int $pageNumber + * + * @return string + */ + protected function createLabel($pageNumber) + { + return sprintf( + $this->translate('Show items %u to %u of %u'), + $this->getFirstItemNumberOfPage($pageNumber), + $this->getLastItemNumberOfPage($pageNumber), + $this->getTotalCount() + ); + } + + /** + * Create and return the previous page item + * + * @return BaseHtmlElement + */ + protected function createPreviousPageItem() + { + $prevIcon = new Icon('angle-left'); + + $currentPageNumber = $this->getCurrentPageNumber(); + + if ($currentPageNumber > 1) { + $prevItem = Html::tag('li', ['class' => 'nav-item']); + + $prevItem->add(Html::tag( + 'a', + [ + 'class' => 'previous-page', + 'href' => $this->createUrl($currentPageNumber - 1), + 'title' => $this->createLabel($currentPageNumber - 1) + ], + $prevIcon + )); + } else { + $prevItem = Html::tag( + 'li', + [ + 'aria-hidden' => true, + 'class' => 'nav-item disabled' + ] + ); + + $prevItem->add(Html::tag('span', ['class' => 'previous-page'], $prevIcon)); + } + + return $prevItem; + } + + /** + * Create and return the next page item + * + * @return BaseHtmlElement + */ + protected function createNextPageItem() + { + $nextIcon = new Icon('angle-right'); + + $currentPageNumber = $this->getCurrentPageNumber(); + + if ($currentPageNumber < $this->getPageCount()) { + $nextItem = Html::tag('li', ['class' => 'nav-item']); + + $nextItem->add(Html::tag( + 'a', + [ + 'class' => 'next-page', + 'href' => $this->createUrl($currentPageNumber + 1), + 'title' => $this->createLabel($currentPageNumber + 1) + ], + $nextIcon + )); + } else { + $nextItem = Html::tag( + 'li', + [ + 'aria-hidden' => true, + 'class' => 'nav-item disabled' + ] + ); + + $nextItem->add(Html::tag('span', ['class' => 'next-page'], $nextIcon)); + } + + return $nextItem; + } + + /** @TODO(el): Use ipl-translation when it's ready instead */ + private function translate($message) + { + return $message; + } + + /** + * Create and return the first page item + * + * @return BaseHtmlElement + */ + protected function createFirstPageItem() + { + $currentPageNumber = $this->getCurrentPageNumber(); + + $url = clone $this->url; + + $firstItem = Html::tag('li', ['class' => 'nav-item']); + + if ($currentPageNumber === 1) { + $firstItem->addAttributes(['class' => 'disabled']); + $firstItem->add(Html::tag( + 'span', + ['class' => 'first-page'], + $this->getFirstItemNumberOfPage(1) + )); + } else { + $firstItem->add(Html::tag( + 'a', + [ + 'class' => 'first-page', + 'href' => $url->remove(['page'])->getAbsoluteUrl(), + 'title' => $this->createLabel(1) + ], + $this->getFirstItemNumberOfPage(1) + )); + } + + return $firstItem; + } + + /** + * Create and return the last page item + * + * @return BaseHtmlElement + */ + protected function createLastPageItem() + { + $currentPageNumber = $this->getCurrentPageNumber(); + $lastItem = Html::tag('li', ['class' => 'nav-item']); + + if ($currentPageNumber === $this->getPageCount()) { + $lastItem->addAttributes(['class' => 'disabled']); + $lastItem->add(Html::tag( + 'span', + ['class' => 'last-page'], + $this->getPageCount() + )); + } else { + $lastItem->add(Html::tag( + 'a', + [ + 'class' => 'last-page', + 'href' => $this->url->setParam('page', $this->getPageCount()), + 'title' => $this->createLabel($this->getPageCount()) + ], + $this->getPageCount() + )); + } + + return $lastItem; + } + + /** + * Create and return the page selector item + * + * @return BaseHtmlElement + */ + protected function createPageSelectorItem() + { + $currentPageNumber = $this->getCurrentPageNumber(); + + $form = new CompatForm($this->url); + $form->addAttributes(['class' => 'inline']); + $form->setMethod('GET'); + + $select = Html::tag('select', [ + 'name' => $this->getPageParam(), + 'class' => 'autosubmit', + 'title' => t('Go to page …') + ]); + + if (isset($currentPageNumber)) { + if ($currentPageNumber === 1 || $currentPageNumber === $this->getPageCount()) { + $select->add(Html::tag('option', ['disabled' => '', 'selected' => ''], '…')); + } + } + + foreach (range(2, $this->getPageCount() - 1) as $page) { + $option = Html::tag('option', [ + 'value' => $page + ], $page); + + if ($page == $currentPageNumber) { + $option->addAttributes(['selected' => '']); + } + + $select->add($option); + } + + $form->add($select); + + $pageSelectorItem = Html::tag('li', $form); + + return $pageSelectorItem; + } + + protected function assemble() + { + if ($this->getPageCount() < 2) { + return; + } + + // Accessibility info + $this->add(Html::tag( + 'h2', + [ + 'class' => 'sr-only', + 'tabindex' => '-1' + ], + $this->translate('Pagination') + )); + + $paginator = Html::tag('ul', ['class' => 'tab-nav nav']); + + $paginator->add([ + $this->createFirstPageItem(), + $this->createPreviousPageItem(), + $this->createPageSelectorItem(), + $this->createNextPageItem(), + $this->createLastPageItem() + ]); + + $this->add($paginator); + } +} |