From ca137f3fd7fd7a98e71e8ce3c063979a10a51e20 Mon Sep 17 00:00:00 2001
From: sebastien <lorber.sebastien@gmail.com>
Date: Fri, 21 Nov 2025 18:08:05 +0100
Subject: [PATCH 1/4] fix Firefox text selection?

---
 .../src/theme/CodeBlock/Line/index.tsx                    | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
index 80000b80d312..b50c1875b4d3 100644
--- a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
@@ -17,12 +17,13 @@ type Token = Props['line'][number];
 // Replaces '\n' by ''
 // Historical code, not sure why we even need this :/
 function fixLineBreak(line: Token[]) {
+  /*
   const singleLineBreakToken =
     line.length === 1 && line[0]!.content === '\n' ? line[0] : undefined;
-
   if (singleLineBreakToken) {
     return [{...singleLineBreakToken, content: ''}];
   }
+   */
 
   return line;
 }
@@ -51,7 +52,7 @@ export default function CodeBlockLine({
   });
 
   return (
-    <span {...lineProps}>
+    <div {...lineProps}>
       {showLineNumbers ? (
         <>
           <span className={styles.codeLineNumber} />
@@ -60,7 +61,6 @@ export default function CodeBlockLine({
       ) : (
         lineTokens
       )}
-      <br />
-    </span>
+    </div>
   );
 }

From b23b3186c81327e42eaf05c9724f13c42f7067af Mon Sep 17 00:00:00 2001
From: sebastien <lorber.sebastien@gmail.com>
Date: Fri, 21 Nov 2025 18:09:38 +0100
Subject: [PATCH 2/4] revert fixlinebreak?

---
 .../src/theme/CodeBlock/Line/index.tsx        | 20 +------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
index b50c1875b4d3..ea2555921385 100644
--- a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
@@ -12,31 +12,13 @@ import type {Props} from '@theme/CodeBlock/Line';
 
 import styles from './styles.module.css';
 
-type Token = Props['line'][number];
-
-// Replaces '\n' by ''
-// Historical code, not sure why we even need this :/
-function fixLineBreak(line: Token[]) {
-  /*
-  const singleLineBreakToken =
-    line.length === 1 && line[0]!.content === '\n' ? line[0] : undefined;
-  if (singleLineBreakToken) {
-    return [{...singleLineBreakToken, content: ''}];
-  }
-   */
-
-  return line;
-}
-
 export default function CodeBlockLine({
-  line: lineProp,
+  line,
   classNames,
   showLineNumbers,
   getLineProps,
   getTokenProps,
 }: Props): ReactNode {
-  const line = fixLineBreak(lineProp);
-
   const lineProps = getLineProps({
     line,
     className: clsx(classNames, showLineNumbers && styles.codeLine),

From c2ba2e24b4febc81c08026d0a3b09913a061019c Mon Sep 17 00:00:00 2001
From: sebastien <lorber.sebastien@gmail.com>
Date: Fri, 21 Nov 2025 18:46:27 +0100
Subject: [PATCH 3/4] revert line break

---
 .../src/theme/CodeBlock/Line/index.tsx                | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
index ea2555921385..526998921fa2 100644
--- a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
@@ -12,6 +12,16 @@ import type {Props} from '@theme/CodeBlock/Line';
 
 import styles from './styles.module.css';
 
+/*
+This <br/ seems useful when the line has no content to prevent collapsing.
+For code blocks with "diff" languages, this makes the empty lines collapse to
+zero height lines, which is undesirable.
+See also https://github.com/facebook/docusaurus/pull/11565
+*/
+function LineBreak() {
+  return <br />;
+}
+
 export default function CodeBlockLine({
   line,
   classNames,
@@ -43,6 +53,7 @@ export default function CodeBlockLine({
       ) : (
         lineTokens
       )}
+      <LineBreak />
     </div>
   );
 }

From 89f4c361ea9cbfcd20c0cca42f06b6e076bb81a3 Mon Sep 17 00:00:00 2001
From: sebastien <lorber.sebastien@gmail.com>
Date: Fri, 21 Nov 2025 19:07:26 +0100
Subject: [PATCH 4/4] keep all line break workarounds

---
 .../src/theme/CodeBlock/Line/index.tsx        | 27 ++++++++++++++-----
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
index 526998921fa2..803c06466eae 100644
--- a/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/CodeBlock/Line/index.tsx
@@ -12,23 +12,36 @@ import type {Props} from '@theme/CodeBlock/Line';
 
 import styles from './styles.module.css';
 
-/*
-This <br/ seems useful when the line has no content to prevent collapsing.
-For code blocks with "diff" languages, this makes the empty lines collapse to
-zero height lines, which is undesirable.
-See also https://github.com/facebook/docusaurus/pull/11565
-*/
+type Token = Props['line'][number];
+
+// This <br/ seems useful when the line has no content to prevent collapsing.
+// For code blocks with "diff" languages, this makes the empty lines collapse to
+// zero height lines, which is undesirable.
+// See also https://github.com/facebook/docusaurus/pull/11565
 function LineBreak() {
   return <br />;
 }
 
+// Replaces single lines with '\n' by '' so that we don't end up with
+// duplicate line breaks (the '\n' + the artificial <br/> above)
+// see also https://github.com/facebook/docusaurus/pull/11565
+function fixLineBreak(line: Token[]) {
+  const singleLineBreakToken =
+    line.length === 1 && line[0]!.content === '\n' ? line[0] : undefined;
+  if (singleLineBreakToken) {
+    return [{...singleLineBreakToken, content: ''}];
+  }
+  return line;
+}
+
 export default function CodeBlockLine({
-  line,
+  line: lineProp,
   classNames,
   showLineNumbers,
   getLineProps,
   getTokenProps,
 }: Props): ReactNode {
+  const line = fixLineBreak(lineProp);
   const lineProps = getLineProps({
     line,
     className: clsx(classNames, showLineNumbers && styles.codeLine),