From fe79010e4e32604ff3685fa6f42289d0c83abd03 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Fri, 8 Sep 2017 23:36:22 +0100
Subject: [PATCH] Only add the code copy button for HTML messages

Trivial fast-path optimisation: plain text messages cannot possibly contain pre
blocks so there's no point in trying to parse them in order to add code copy
buttons.
---
 src/HtmlUtils.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/HtmlUtils.js b/src/HtmlUtils.js
index 87e714083b..ccc7c1a630 100644
--- a/src/HtmlUtils.js
+++ b/src/HtmlUtils.js
@@ -393,7 +393,7 @@ export function bodyToHtml(content, highlights, opts) {
         }
         safeBody = sanitizeHtml(body, sanitizeHtmlParams);
         safeBody = unicodeToImage(safeBody);
-        safeBody = addCodeCopyButton(safeBody);
+        if (isHtml) safeBody = addCodeCopyButton(safeBody);
     }
     finally {
         delete sanitizeHtmlParams.textFilter;