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\Html\Srcset;
+
+/**
+ * Represents a source candidate for the HTML srcset attribute
+ * using the "x" unit (relative pixel density, like "1x" or "2x")
+ */
+final class DensitySrcsetCandidate extends SrcsetCandidate
+{
+    public function __construct(
+        protected float $density,
+        protected ?int $referenceWidth = null
+    ) {}
+
+    public function getDensity(): float
+    {
+        return $this->density;
+    }
+
+    public function setDensity(float $density): static
+    {
+        $this->density = $density;
+        return $this;
+    }
+
+    public function getReferenceWidth(): ?int
+    {
+        return $this->referenceWidth;
+    }
+
+    /**
+     * The absolute $referenceWidth will be used as "1x" width.
+     */
+    public function setReferenceWidth(int $referenceWidth): static
+    {
+        $this->referenceWidth = $referenceWidth;
+        return $this;
+    }
+
+    public function getDescriptor(): string
+    {
+        return $this->density . static::DENSITY_UNIT;
+    }
+
+    public function getCalculatedWidth(): int
+    {
+        if ($this->referenceWidth === null) {
+            throw new \InvalidArgumentException(sprintf(
+                'Reference width needs to be specified if pixel density descriptors (e. g. 2x) are used in srcset: %s',
+                $this->getDescriptor()
+            ), 1697743145);
+        }
+        return (int)($this->density * $this->referenceWidth);
+    }
+}