From: Christian Weiske <cweiske@cweiske.de>
Date: Fri, 26 Sep 2025 14:56:31 +0000 (+0200)
Subject: (no commit message)
X-Git-Url: https://git.cweiske.de/paste/936.git/commitdiff_plain/HEAD?ds=sidebyside

---

c2cbb27b97162b8bfdccbfd60884f256d3e32ebd
diff --git a/Page/InheritedPropertyViewHelper.php b/Page/InheritedPropertyViewHelper.php
new file mode 100644
index 0000000..9ebc5af
--- /dev/null
+++ b/Page/InheritedPropertyViewHelper.php
@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Vendor\MyExtension\ViewHelpers\Page;
+
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
+use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
+
+/**
+ * Get a page row property, inherited up through the rootline.
+ *
+ * When a value is NULL or an empty string "", then the parent page's
+ * value is used.
+ *
+ * The column must be in the rootline already.
+ * This can be configured via TYPO3_CONF_VARS[FE][addRootLineFields].
+ */
+class InheritedPropertyViewHelper extends AbstractViewHelper
+{
+    protected $escapeOutput = false;
+
+    public function initializeArguments(): void
+    {
+        $this->registerArgument(
+            'column',
+            'string',
+            'Page row column name',
+            true,
+        );
+        $this->registerArgument(
+            'default',
+            'string',
+            'Fallback value when all pages have an empty value',
+            true,
+        );
+    }
+
+    public function render(): mixed
+    {
+        $column = $this->arguments['column'];
+        $rootLine = $this->getRootLine();
+
+        foreach ($rootLine as $pageRow) {
+            if (!array_key_exists($column, $pageRow)) {
+                throw new \OutOfRangeException(
+                    'Column is not part of the rootline: ' . $column,
+                    1758882723
+                );
+            }
+
+            if ($pageRow[$column] !== null && $pageRow[$column] !== '') {
+                return $pageRow[$column];
+            }
+        }
+
+        return $this->arguments['default'];
+    }
+
+    protected function getRootLine(): array
+    {
+        return $this->getFrontendController()->rootLine;
+    }
+
+    protected function getFrontendController(): TypoScriptFrontendController
+    {
+        return $GLOBALS['TSFE'];
+    }
+}
diff --git a/z-template.html b/z-template.html
new file mode 100644
index 0000000..a81b12c
--- /dev/null
+++ b/z-template.html
@@ -0,0 +1,3 @@
+<f:if condition="{myextension:page.inheritedProperty(column:'tx_mysocial_show_comments',default:1)}">
+    <!-- show comments -->
+</f:if>