From 7c5866059d41c288a6b4cf8bd9e2a6b5318405e8 Mon Sep 17 00:00:00 2001
From: Bas Leijdekkers <basleijdekkers@gmail.com>
Date: Wed, 19 Jun 2024 12:48:43 +0200
Subject: [PATCH] Don't highlight when selection contains line break
 (IJPL-45173)

for "Highlight occurrences of selected text"

GitOrigin-RevId: 8a79a4b0212a711739c6532dd70afd917d20aa9b
---
 .../codeInsight/highlighting/BackgroundHighlighter.java         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/highlighting/BackgroundHighlighter.java b/platform/lang-impl/src/com/intellij/codeInsight/highlighting/BackgroundHighlighter.java
index 4272ed9330a6..1d95fca9a478 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/highlighting/BackgroundHighlighter.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/highlighting/BackgroundHighlighter.java
@@ -190,7 +190,7 @@ final class BackgroundHighlighter {
     int end = caret.getSelectionEnd();
     CharSequence sequence = document.getCharsSequence();
     String toFind = sequence.subSequence(start, end).toString();
-    if (toFind.trim().isEmpty()) {
+    if (toFind.trim().isEmpty() || toFind.contains("\n")) {
       return false;
     }
     String previous = editor.getUserData(HIGHLIGHTED_TEXT);