TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
commit af8cc155b5
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+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+namespace TYPO3\CMS\Core\Pagination;
+
+final class SlidingWindowPagination implements PaginationInterface
+{
+    private int $displayRangeStart = 0;
+    private int $displayRangeEnd = 0;
+    private bool $hasLessPages = false;
+    private bool $hasMorePages = false;
+    private int $maximumNumberOfLinks = 0;
+    private PaginatorInterface $paginator;
+
+    public function __construct(PaginatorInterface $paginator, int $maximumNumberOfLinks = 0)
+    {
+        $this->paginator = $paginator;
+
+        if ($maximumNumberOfLinks > 0) {
+            $this->maximumNumberOfLinks = $maximumNumberOfLinks;
+        }
+
+        $this->calculateDisplayRange();
+    }
+
+    public function getPreviousPageNumber(): ?int
+    {
+        $previousPage = $this->paginator->getCurrentPageNumber() - 1;
+
+        if ($previousPage > $this->paginator->getNumberOfPages()) {
+            return null;
+        }
+
+        return $previousPage >= $this->getFirstPageNumber() ? $previousPage : null;
+    }
+
+    public function getNextPageNumber(): ?int
+    {
+        $nextPage = $this->paginator->getCurrentPageNumber() + 1;
+
+        return $nextPage <= $this->paginator->getNumberOfPages() ? $nextPage : null;
+    }
+
+    public function getFirstPageNumber(): int
+    {
+        return 1;
+    }
+
+    public function getLastPageNumber(): int
+    {
+        return $this->paginator->getNumberOfPages();
+    }
+
+    public function getStartRecordNumber(): int
+    {
+        if ($this->paginator->getCurrentPageNumber() > $this->paginator->getNumberOfPages()) {
+            return 0;
+        }
+
+        return $this->paginator->getKeyOfFirstPaginatedItem() + 1;
+    }
+
+    public function getEndRecordNumber(): int
+    {
+        if ($this->paginator->getCurrentPageNumber() > $this->paginator->getNumberOfPages()) {
+            return 0;
+        }
+
+        return $this->paginator->getKeyOfLastPaginatedItem() + 1;
+    }
+
+    public function getAllPageNumbers(): array
+    {
+        return range($this->displayRangeStart, $this->displayRangeEnd);
+    }
+
+    public function getDisplayRangeStart(): int
+    {
+        return $this->displayRangeStart;
+    }
+
+    public function getDisplayRangeEnd(): int
+    {
+        return $this->displayRangeEnd;
+    }
+
+    public function getHasLessPages(): bool
+    {
+        return $this->hasLessPages;
+    }
+
+    public function getHasMorePages(): bool
+    {
+        return $this->hasMorePages;
+    }
+
+    public function getMaximumNumberOfLinks(): int
+    {
+        return $this->maximumNumberOfLinks;
+    }
+
+    public function getPaginator(): PaginatorInterface
+    {
+        return $this->paginator;
+    }
+
+    private function calculateDisplayRange(): void
+    {
+        $maximumNumberOfLinks = $this->maximumNumberOfLinks;
+        $numberOfPages = $this->paginator->getNumberOfPages();
+
+        if ($maximumNumberOfLinks > $numberOfPages) {
+            $maximumNumberOfLinks = $numberOfPages;
+        }
+
+        $currentPage = $this->paginator->getCurrentPageNumber();
+        $delta = floor($maximumNumberOfLinks / 2);
+
+        $this->displayRangeStart = (int)($currentPage - $delta);
+        $this->displayRangeEnd = (int)($currentPage + $delta - ($maximumNumberOfLinks % 2 === 0 ? 1 : 0));
+
+        if ($this->displayRangeStart < 1) {
+            $this->displayRangeEnd -= $this->displayRangeStart - 1;
+        }
+
+        if ($this->displayRangeEnd > $numberOfPages) {
+            $this->displayRangeStart -= $this->displayRangeEnd - $numberOfPages;
+        }
+
+        $this->displayRangeStart = (int)max($this->displayRangeStart, 1);
+        $this->displayRangeEnd = (int)min($this->displayRangeEnd, $numberOfPages);
+        $this->hasLessPages = $this->displayRangeStart > 2;
+        $this->hasMorePages = $this->displayRangeEnd + 1 < $this->paginator->getNumberOfPages();
+    }
+}