From 7a3930cae6a946b6794a1c75fb7df5fbb875a661 Mon Sep 17 00:00:00 2001
From: Mike Fix <mrfix84@gmail.com>
Date: Thu, 16 May 2019 23:08:48 -0700
Subject: [PATCH] fix line number highlighting after mode changes

- Closes #764
---
 components/Carbon.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/components/Carbon.js b/components/Carbon.js
index 5509a5f..2ab22e0 100644
--- a/components/Carbon.js
+++ b/components/Carbon.js
@@ -33,6 +33,16 @@ class Carbon extends React.PureComponent {
     onChange: () => {}
   }
 
+  componentDidUpdate(prevProps) {
+    // TODO keep opacities in state
+    if (
+      prevProps.config.theme != this.props.config.theme ||
+      prevProps.config.language != this.props.config.language
+    ) {
+      this.prevLine = null
+    }
+  }
+
   handleLanguageChange = debounce(
     (newCode, language) => {
       if (language === 'auto') {