From 39c5b9e02f54e1316df8a0be87e8378ca5be9f03 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Fri, 21 Nov 2025 15:05:41 +0100
Subject: [PATCH] Ignore empty text nodes when searching for existing
 paragraphs

See https://www.woltlab.com/community/thread/314964/
---
 .../input/node/HtmlInputNodeProcessor.class.php  | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeProcessor.class.php b/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeProcessor.class.php
index 813ba10ea5..06a603bf0d 100644
--- a/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeProcessor.class.php
+++ b/wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeProcessor.class.php
@@ -351,11 +351,19 @@ protected function fixDom()
             }
         }
 
-        $appendToPreviousParagraph = static function ($node) {
-            /** @var \DOMElement $paragraph */
-            $paragraph = $node->previousSibling;
+        $appendToPreviousParagraph = static function (\DOMNode $node) {
+            $paragraph = $node;
+            while ($paragraph = $paragraph->previousSibling) {
+                if ($paragraph instanceof \DOMText) {
+                    if (!\str_contains($paragraph->textContent, ' ') && StringUtil::trim($paragraph->textContent) === '') {
+                        continue;
+                    }
+                }
+
+                break;
+            }
 
-            if (!$paragraph || $paragraph->nodeName !== 'p') {
+            if ($paragraph === null || $paragraph->nodeName !== 'p') {
                 $paragraph = $node->ownerDocument->createElement('p');
                 $node->parentNode->insertBefore($paragraph, $node);
             }