[TASK] allow the use of f:section in components

Classes/Fluid/ComponentView.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace SMS\FluidComponents\Fluid;
+
+use TYPO3Fluid\Fluid\Core\Parser\ParsedTemplateInterface;
+use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
+use TYPO3Fluid\Fluid\View\AbstractTemplateView;
+
+class ComponentView extends AbstractTemplateView
+{
+    protected ParsedTemplateInterface $parsedTemplate;
+
+    public function __construct(
+        ParsedTemplateInterface   $parsedTemplate,
+        RenderingContextInterface $context,
+    )
+    {
+        parent::__construct($context);
+        $this->parsedTemplate = $parsedTemplate;
+    }
+
+    /**
+     * @return ParsedTemplateInterface
+     */
+    protected function getCurrentParsedTemplate()
+    {
+        return $this->parsedTemplate;
+    }
+}

Classes/Fluid/ViewHelper/ComponentRenderer.php

@@ -8,6 +8,7 @@
 use Psr\Http\Message\ServerRequestInterface;
 use SMS\FluidComponents\Domain\Model\RequiredSlotPlaceholder;
 use SMS\FluidComponents\Domain\Model\Slot;
+use SMS\FluidComponents\Fluid\ComponentView;
 use SMS\FluidComponents\Interfaces\ComponentAware;
 use SMS\FluidComponents\Interfaces\EscapedParameter;
 use SMS\FluidComponents\Interfaces\RenderingContextAware;
@@ -142,7 +143,6 @@ public function render(): string
             $renderingContext = GeneralUtility::makeInstance(RenderingContextFactory::class)->create([], $request);
         }
 
-        $renderingContext->setViewHelperVariableContainer($this->renderingContext->getViewHelperVariableContainer());
         if (static::shouldUseTemplatePaths()) {
             $renderingContext->getTemplatePaths()->setPartialRootPaths(
                 $this->renderingContext->getTemplatePaths()->getPartialRootPaths()
@@ -193,6 +193,12 @@ public function render(): string
             );
         }
 
+        // Set custom view to reset rendering stack
+        $view = new ComponentView($this->parsedTemplate, $renderingContext);
+        $viewHelperVariableContainer = clone $this->renderingContext->getViewHelperVariableContainer();
+        $viewHelperVariableContainer->setView($view);
+        $renderingContext->setViewHelperVariableContainer($viewHelperVariableContainer);
+
         // Render component
         return $this->parsedTemplate->render($renderingContext);
     }

Tests/Fixtures/Functional/Components/WithSection/WithSection.html

@@ -0,0 +1,8 @@
+<fc:component>
+    <fc:renderer>
+        <f:render section="test" />
+    </fc:renderer>
+</fc:component>
+<f:section name="test">
+    A renderer with a section.
+</f:section>

Tests/Functional/ComponentRendererTest.php

@@ -63,6 +63,7 @@ public static function renderComponentProvider()
                 'falseParameter' => false, // strange fluid behavior: will be empty string
             ], '', 'This is a string|123|1|'],
             ['DateTimeParameter', ['date' => 1601371704], '', 'Tue, 29 Sep 2020 09:28:24 +0000'],
+            ['WithSection', [], '', 'A renderer with a section.'],
         ];
     }