Configure preview renderer via page TSconfig

brotkrueml · brotkrueml · commit 781d189fa05c · 2025-11-30T14:50:36.000+01:00
diff --git a/Classes/Preview/ContentPreviewRenderer.php b/Classes/Preview/ContentPreviewRenderer.php
diff --git a/Classes/ViewHelpers/Format/CropLinesViewHelper.php b/Classes/ViewHelpers/Format/CropLinesViewHelper.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the "codehighlight" extension for TYPO3 CMS.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Brotkrueml\CodeHighlight\ViewHelpers\Format;
+
+use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
+
+/**
+ * @internal
+ */
+final class CropLinesViewHelper extends AbstractViewHelper
+{
+    private const MAX_LINES = 20;
+
+    public function render(): string
+    {
+        $stringToTruncate = (string) $this->renderChildren();
+
+        $lines = \preg_split('/\R/', $stringToTruncate);
+        if ($lines === false) {
+            return $stringToTruncate;
+        }
+
+        $slicedLines = \array_slice($lines, 0, self::MAX_LINES);
+        $output = \implode("\r\n", $slicedLines);
+        if (\count($lines) !== \count($slicedLines)) {
+            $output .= "\r\n\r\n...";
+        }
+
+        return $output;
+    }
+}
diff --git a/Configuration/TCA/Overrides/tt_content.php b/Configuration/TCA/Overrides/tt_content.php
@@ -8,7 +8,6 @@
  */
 
 use Brotkrueml\CodeHighlight\Extension;
-use Brotkrueml\CodeHighlight\Preview\ContentPreviewRenderer;
 use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
 
 defined('TYPO3') || die();
@@ -35,7 +34,6 @@
     );
 
     $GLOBALS['TCA']['tt_content']['types'][$contentType] = [
-        'previewRenderer' => ContentPreviewRenderer::class,
         'columnsOverrides' => [
             'bodytext' => [
                 'label' => Extension::LANGUAGE_PATH_CONTENT_ELEMENT . ':codeSnippet',
diff --git a/Configuration/page.tsconfig b/Configuration/page.tsconfig
@@ -1 +1,5 @@
 @import "EXT:codehighlight/Configuration/TsConfig/Page/*.tsconfig"
+
+mod.web_layout.tt_content.preview {
+  tx_codehighlight_codesnippet = EXT:codehighlight/Resources/Private/Templates/Preview/CodeSnippetPreview.html
+}
diff --git a/Resources/Private/Templates/CodeSnippetPreview.html b/Resources/Private/Templates/CodeSnippetPreview.html
@@ -0,0 +1,32 @@
+<html
+    data-namespace-typo3-fluid="true"
+    xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers"
+    lang="en"
+>
+
+<f:if condition="{record.bodytext}">
+    <f:then>
+        <pre><code>{record.bodytext -> codeHighlight:format.cropLines()}</code></pre>
+    </f:then>
+    <f:else>
+        <br>
+        <div class="alert alert-warning">
+            <f:translate key="LLL:EXT:codehighlight/Resources/Private/Language/ContentElement.xlf:codeSnippet.notDefined"/>
+        </div>
+    </f:else>
+</f:if>
+
+<f:if condition="{record.pi_flexform.programmingLanguage} || {record.pi_flexform.filename}">
+    <div class="t3-page-ce-footer" style="margin-inline:-20px;margin-block-end:-20px;">
+        <div class="t3-page-ce-info">
+            <f:if condition="{record.pi_flexform.programmingLanguage}">
+                <strong>{record.pi_flexform.programmingLanguage.0 -> f:format.case()}</strong>
+            </f:if>
+            <f:if condition="{record.pi_flexform.filename}">
+                {record.pi_flexform.filename}
+            </f:if>
+        </div>
+    </div>
+</f:if>
+
+</html>
