first commit

typo3/sysext/frontend/Classes/Hooks/FrontendHooks.php

@@ -0,0 +1,74 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Frontend\Hooks;
+
+/*
+ * 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!
+ */
+
+use TYPO3\CMS\Core\Localization\LanguageService;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
+
+/**
+ * Uses frontend hooks to show preview information
+ * @internal this is a concrete TYPO3 hook implementation and solely used for EXT:frontend and not part of TYPO3's Core API.
+ */
+class FrontendHooks
+{
+    /**
+     * Include the preview block in case we're looking at a hidden page
+     * in the LIVE workspace
+     *
+     * @param array $params
+     * @param TypoScriptFrontendController $controller
+     */
+    public function displayPreviewInfoMessage($params, TypoScriptFrontendController $controller)
+    {
+        if (!$controller->fePreview || $controller->doWorkspacePreview() || ($controller->config['config']['disablePreviewNotification'] ?? false)) {
+            return;
+        }
+        if ($controller->config['config']['message_preview']) {
+            $message = $controller->config['config']['message_preview'];
+        } else {
+            $label = $this->getLanguageService()->sL('LLL:EXT:core/Resources/Private/Language/locallang_tsfe.xlf:preview');
+            $styles = [];
+            $styles[] = 'position: fixed';
+            $styles[] = 'top: 15px';
+            $styles[] = 'right: 15px';
+            $styles[] = 'padding: 8px 18px';
+            $styles[] = 'background: #fff3cd';
+            $styles[] = 'border: 1px solid #ffeeba';
+            $styles[] = 'font-family: sans-serif';
+            $styles[] = 'font-size: 14px';
+            $styles[] = 'font-weight: bold';
+            $styles[] = 'color: #856404';
+            $styles[] = 'z-index: 20000';
+            $styles[] = 'user-select: none';
+            $styles[] = 'pointer-events: none';
+            $styles[] = 'text-align: center';
+            $styles[] = 'border-radius: 2px';
+            $message = '<div id="typo3-preview-info" style="' . implode(';', $styles) . '">' . htmlspecialchars($label) . '</div>';
+        }
+        if (!empty($message)) {
+            $controller->content = str_ireplace('</body>', $message . '</body>', $controller->content);
+        }
+    }
+
+    /**
+     * @return LanguageService
+     */
+    protected function getLanguageService()
+    {
+        return $GLOBALS['LANG'];
+    }
+}