fix: Allow properties of ancestor block to populate child block

Author: jissereitsma

Util/Block/BlockRenderer.php

@@ -26,7 +26,7 @@ public function get(
             throw new RuntimeException((string)__('No block found with name "%1"', $blockName));
         }
 
-        $this->populateBlock($block, $data);
+        $this->populateBlock($block, $data, $ancestorBlock);
 
         if ($block instanceof Template && false === strlen($block->getTemplate()) > 0) {
             throw new RuntimeException((string)__('No template found with block "%1"', $blockName));

Util/Block/TemplateRenderer.php

@@ -19,7 +19,7 @@ public function get(
         $block = $this->createBlockFromTemplate($templateName, $blockName);
         $block->setTemplate($templateName); // @phpstan-ignore bitExpertMagento.setTemplateDisallowedForBlock
 
-        $this->populateBlock($block, $data);
+        $this->populateBlock($block, $data, $ancestorBlock);
 
         return $block;
     }

Util/Block/TransferableAncestorBlockProperties.php

@@ -0,0 +1,19 @@
+<?php declare(strict_types=1);
+
+namespace Loki\Components\Util\Block;
+
+class TransferableAncestorBlockProperties
+{
+    private array $properties;
+
+    public function __construct(
+        array $properties = []
+    ) {
+        $this->properties = $properties;
+    }
+
+    public function getProperties(): array
+    {
+        return $this->properties;
+    }
+}

etc/di.xml

@@ -119,4 +119,12 @@
             </argument>
         </arguments>
     </type>
+
+    <type name="Loki\Components\Util\Block\TransferableAncestorBlockProperties">
+        <arguments>
+            <argument name="properties" xsi:type="array">
+                <item name="css_classes" xsi:type="string">css_classes</item>
+            </argument>
+        </arguments>
+    </type>
 </config>