New Trait for decoding attribute in images

system/src/Grav/Common/Media/Traits/ImageDecodingTrait.php

@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @package    Grav\Common\Media
+ *
+ * @copyright  Copyright (c) 2015 - 2024 Trilby Media, LLC. All rights reserved.
+ * @license    MIT License; see LICENSE file for details.
+ */
+
+namespace Grav\Common\Media\Traits;
+
+use Grav\Common\Grav;
+
+/**
+ * Trait ImageLoadingTrait
+ * @package Grav\Common\Media\Traits
+ */
+
+trait ImageDecodingTrait
+{
+    /**
+     * Allows to set the decoding attribute from Markdown or Twig
+     *
+     * @param string|null $value
+     * @return $this
+     */
+    public function decoding($value = null)
+    {
+        $validValues = ['sync', 'async', 'auto'];
+
+        if (null === $value) {
+            $value = Grav::instance()['config']->get('system.images.defaults.decoding', 'auto');
+        }
+
+        // Validate the provided value
+        if ($value && in_array($value, $validValues, true)) {
+            $this->attributes['decoding'] = $value;
+        }
+
+        return $this;
+    }
+}

system/src/Grav/Common/Page/Medium/ImageMedium.php

@@ -15,6 +15,7 @@
 use Grav\Common\Media\Interfaces\ImageMediaInterface;
 use Grav\Common\Media\Interfaces\MediaLinkInterface;
 use Grav\Common\Media\Traits\ImageLoadingTrait;
+use Grav\Common\Media\Traits\ImageDecodingTrait;
 use Grav\Common\Media\Traits\ImageMediaTrait;
 use Grav\Common\Utils;
 use Gregwar\Image\Image;
@@ -30,6 +31,7 @@ class ImageMedium extends Medium implements ImageMediaInterface, ImageManipulate
 {
     use ImageMediaTrait;
     use ImageLoadingTrait;
+    use ImageDecodingTrait;
 
     /**
      * @var mixed|string