[BUGFIX] TYPO3 v8LTS: Add be:thumbnail ViewHelper to TV+

This VH is only available from TYPO3 v10LTS onwards.

Related: #390
Release: 8.0.0

Classes/ViewHelpers/ThumbnailViewHelper.php

@@ -0,0 +1,114 @@
+<?php
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+declare(strict_types=1);
+
+namespace Tvp\TemplaVoilaPlus\ViewHelpers;
+
+use TYPO3\CMS\Core\Imaging\ImageManipulation\CropVariantCollection;
+use TYPO3\CMS\Core\Resource\Exception\ResourceDoesNotExistException;
+use TYPO3\CMS\Core\Resource\ProcessedFile;
+use TYPO3\CMS\Fluid\ViewHelpers\ImageViewHelper;
+use TYPO3Fluid\Fluid\Core\ViewHelper\Exception;
+
+/**
+ * File taken from TYPO3 Core typo3/sysext/backend/Classes/ViewHelpers/ThumbnailViewHelper.php as we support from TYPO3 v8LTS but it is only included since TYPO3 v10LTS.
+ */
+class ThumbnailViewHelper extends ImageViewHelper
+{
+
+    /**
+     * Initialize arguments.
+     */
+    public function initializeArguments()
+    {
+        parent::initializeArguments();
+        $this->registerArgument('context', 'string', 'context for image rendering', false, ProcessedFile::CONTEXT_IMAGEPREVIEW);
+    }
+
+    /**
+     * Resizes a given image (if required) and renders the respective img tag
+     *
+     * @see https://docs.typo3.org/typo3cms/TyposcriptReference/ContentObjects/Image/
+     *
+     * @throws Exception
+     * @return string Rendered tag
+     */
+    public function render()
+    {
+        if (($this->arguments['src'] === '' && $this->arguments['image'] === null) || ($this->arguments['src'] !== '' && $this->arguments['image'] !== null)) {
+            throw new Exception('You must either specify a string src or a File object.', 1533290762);
+        }
+
+        try {
+            $image = $this->imageService->getImage((string)$this->arguments['src'], $this->arguments['image'], (bool)$this->arguments['treatIdAsReference']);
+
+            $cropString = $this->arguments['crop'];
+            if ($cropString === null && $image->hasProperty('crop') && $image->getProperty('crop')) {
+                $cropString = $image->getProperty('crop');
+            }
+            $cropVariantCollection = CropVariantCollection::create((string)$cropString);
+            $cropVariant = $this->arguments['cropVariant'] ?: 'default';
+            $cropArea = $cropVariantCollection->getCropArea($cropVariant);
+            $processingInstructions = [];
+            if (!$cropArea->isEmpty()) {
+                $processingInstructions['crop'] = $cropArea->makeAbsoluteBasedOnFile($image);
+            }
+            foreach (['width', 'height', 'minWidth', 'minHeight', 'maxWidth', 'maxHeight'] as $argument) {
+                if (!empty($this->arguments[$argument])) {
+                    $processingInstructions[$argument] = $this->arguments[$argument];
+                }
+            }
+
+            $processedFile = $image->process($this->arguments['context'], $processingInstructions);
+            $imageUri = $processedFile->getPublicUrl();
+
+            if (!$this->tag->hasAttribute('data-focus-area')) {
+                $focusArea = $cropVariantCollection->getFocusArea($cropVariant);
+                if (!$focusArea->isEmpty()) {
+                    $this->tag->addAttribute('data-focus-area', $focusArea->makeAbsoluteBasedOnFile($image));
+                }
+            }
+            $this->tag->addAttribute('src', $imageUri);
+            $this->tag->addAttribute('width', $processedFile->getProperty('width'));
+            $this->tag->addAttribute('height', $processedFile->getProperty('height'));
+
+            $alt = $image->getProperty('alternative');
+            $title = $image->getProperty('title');
+
+            // The alt-attribute is mandatory to have valid html-code, therefore add it even if it is empty
+            if (empty($this->arguments['alt'])) {
+                $this->tag->addAttribute('alt', $alt);
+            }
+            if (empty($this->arguments['title']) && $title) {
+                $this->tag->addAttribute('title', $title);
+            }
+        } catch (ResourceDoesNotExistException $e) {
+            // thrown if file does not exist
+            throw new Exception($e->getMessage(), 1533294109, $e);
+        } catch (\UnexpectedValueException $e) {
+            // thrown if a file has been replaced with a folder
+            throw new Exception($e->getMessage(), 1533294113, $e);
+        } catch (\RuntimeException $e) {
+            // RuntimeException thrown if a file is outside of a storage
+            throw new Exception($e->getMessage(), 1533294116, $e);
+        } catch (\InvalidArgumentException $e) {
+            // thrown if file storage does not exist
+            throw new Exception($e->getMessage(), 1533294120, $e);
+        }
+
+        return $this->tag->render();
+    }
+}

Resources/Private/Partials/Backend/Handler/DoktypeDefaultHandler/Node.html

@@ -3,7 +3,7 @@
 
 <f:if condition="{node.raw.table} == sys_file">
     <f:then>
-        <be:thumbnail src="{node.raw.entity.uid}" height="64" width="64" />
+        <tvp:thumbnail src="{node.raw.entity.uid}" height="64" width="64" />
     </f:then>
     <f:else>
         <f:render section="TableNode" arguments="{_all}" />