From 07fd598bf9337de0c2073064ebf85e9de663e501 Mon Sep 17 00:00:00 2001
From: Paul Makles <paulmakles@gmail.com>
Date: Thu, 18 Aug 2022 12:56:21 +0200
Subject: [PATCH] fix: don't collapse whitespace / newlines

---
 src/components/markdown/RemarkRenderer.tsx | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/components/markdown/RemarkRenderer.tsx b/src/components/markdown/RemarkRenderer.tsx
index 13c88667..155e0ebd 100644
--- a/src/components/markdown/RemarkRenderer.tsx
+++ b/src/components/markdown/RemarkRenderer.tsx
@@ -189,6 +189,11 @@ const RE_QUOTE = /(^(?:>\s){5})[>\s]+(.*$)/gm;
  */
 const RE_HTML_TAGS = /^(<\/?[a-zA-Z0-9]+>)(.*$)/gm;
 
+/**
+ * Regex for matching empty lines
+ */
+const RE_EMPTY_LINE = /^\s*?$/gm;
+
 /**
  * Sanitise Markdown input before rendering
  * @param content Input string
@@ -204,6 +209,11 @@ function sanitise(content: string) {
             // This is to avoid inconsistencies in rendering Markdown inside/after HTML tags
             // https://github.com/revoltchat/revite/issues/733
             .replace(RE_HTML_TAGS, (match) => `\u200E${match}`)
+
+            // Replace empty lines with non-breaking space
+            // because remark renderer is collapsing empty
+            // or otherwise whitespace-only lines of text
+            .replace(RE_EMPTY_LINE, "‎")
     );
 }