Add Vector image auto_sizes support

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

@@ -159,8 +159,9 @@ public static function fromArray(array $items = [], Blueprint $blueprint = null)
                 return new ImageMedium($items, $blueprint);
             case 'thumbnail':
                 return new ThumbnailImageMedium($items, $blueprint);
-            case 'animated':
             case 'vector':
+                return new VectorImageMedium($items, $blueprint);
+            case 'animated':
                 return new StaticImageMedium($items, $blueprint);
             case 'video':
                 return new VideoMedium($items, $blueprint);

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

@@ -0,0 +1,63 @@
+<?php
+
+/**
+ * @package    Grav\Common\Page
+ *
+ * @copyright  Copyright (c) 2015 - 2022 Trilby Media, LLC. All rights reserved.
+ * @license    MIT License; see LICENSE file for details.
+ */
+
+namespace Grav\Common\Page\Medium;
+
+use Grav\Common\Data\Blueprint;
+
+
+/**
+ * Class StaticImageMedium
+ * @package Grav\Common\Page\Medium
+ */
+class VectorImageMedium extends StaticImageMedium
+{
+    /**
+     * Construct.
+     *
+     * @param array $items
+     * @param Blueprint|null $blueprint
+     */
+    public function __construct($items = [], Blueprint $blueprint = null)
+    {
+        parent::__construct($items, $blueprint);
+
+        $height = false;
+        $width = false;
+
+        if (!extension_loaded('simplexml')) {
+            return;
+        }
+
+        $path = $this->get('filepath');
+        if (!$path || !file_exists($path) || !filesize($path)) {
+            return;
+        }
+
+        $xml = simplexml_load_string(file_get_contents($path));
+        $attr = $xml->attributes();
+
+        if (!$attr instanceof \SimpleXMLElement) {
+            return;
+        }
+
+        if ($attr->width > 0 && $attr->height > 0) {
+            $width = (int)$attr->width;
+            $height = (int)$attr->height;
+        } elseif ($attr->viewBox && count($size = explode(' ', $attr->viewBox)) === 4) {
+            $width = (int)$size[2];
+            $height = (int)$size[3];
+        }
+
+        if ($width && $height) {
+            $this->def('width', $width);
+            $this->def('height', $height);
+        }
+    }
+}