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+inside a view helper
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diff --git a/code.php b/code.php
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+<?php\r
+use FluidTYPO3\Vhs\Traits\DefaultRenderMethodViewHelperTrait;\r
+use FluidTYPO3\Vhs\Traits\TemplateVariableViewHelperTrait;\r
+use TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface;\r
+use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;\r
+use TYPO3\CMS\Backend\Utility\BackendUtility;\r
+\r
+class FooViewHelper extends AbstractViewHelper\r
+{\r
+    use DefaultRenderMethodViewHelperTrait;\r
+    use TemplateVariableViewHelperTrait;\r
+\r
+    public static function renderStatic(\r
+        array $arguments,\r
+        \Closure $renderChildrenClosure,\r
+        RenderingContextInterface $renderingContext\r
+    ) {\r
+        $tvc = $renderingContext->getTemplateVariableContainer();\r
+        if ($tvc->exists('record')) {\r
+            //TYPO3 backend list view\r
+            $pageRecord = $tvc->get('record');\r
+            $pageUid = $pageRecord['uid'];\r
+        } else {\r
+            //TYPO3 backend page record edit\r
+            //FIXME: is there a better way to detect the currently selected page\r
+            // in the typo3 backend?\r
+            $pageUid = current(array_keys($_GET['edit']['pages']));\r
+        }\r
+\r
+        //...\r
+    }\r
+}\r
+?>\r