Add the file path to the layer label.

src/Backend/Renderer/Label/Layer/FileLabelRenderer.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * Leaflet maps for Contao CMS.
+ *
+ * @package    contao-leaflet-maps
+ * @author     David Molineus <david.molineus@netzmacht.de>
+ * @copyright  2014-2017 netzmacht David Molineus. All rights reserved.
+ * @license    LGPL-3.0 https://github.com/netzmacht/contao-leaflet-maps/blob/master/LICENSE
+ * @filesource
+ */
+
+declare(strict_types=1);
+
+namespace Netzmacht\Contao\Leaflet\Backend\Renderer\Label\Layer;
+
+use Contao\FilesModel;
+use Symfony\Component\Translation\TranslatorInterface as Translator;
+
+/**
+ * Class FileLabelRenderer
+ *
+ * @package Netzmacht\Contao\Leaflet\Backend\Renderer\Label\Layer
+ */
+class FileLabelRenderer extends AbstractLabelRenderer
+{
+    /**
+     * {@inheritDoc}
+     */
+    protected function getLayerType(): string
+    {
+        return 'file';
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function render(array $row, string $label, Translator $translator): string
+    {
+        $file = FilesModel::findByPk($row['file']);
+
+        if ($file) {
+            $label .= ' <span class="tl_gray">(' . $file->path . ')</span>';
+        }
+
+        return $label;
+    }
+}

src/Bundle/Resources/config/layers.yml

@@ -84,3 +84,8 @@ services:
     class: Netzmacht\Contao\Leaflet\Backend\Renderer\Label\Layer\VectorsLabelRenderer
     tags:
       - { name: 'netzmacht.contao_leaflet.layer_label_renderer' }
+
+  netzmacht.contao_leaflet.layer_label_renderer.file:
+    class: Netzmacht\Contao\Leaflet\Backend\Renderer\Label\Layer\FileLabelRenderer
+    tags:
+      - { name: 'netzmacht.contao_leaflet.layer_label_renderer' }