From d41b0b010ab94b898cbfd43bf545879d2fba0b4e Mon Sep 17 00:00:00 2001
From: Ron Kok <ronkok@comcast.net>
Date: Sun, 27 May 2018 18:59:24 -0700
Subject: [PATCH] Fix nested \tfrac (#1370)

Fixes issue #1352.
---
 src/functions/genfrac.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/functions/genfrac.js b/src/functions/genfrac.js
index e35fec90..5a4c5f23 100644
--- a/src/functions/genfrac.js
+++ b/src/functions/genfrac.js
@@ -75,7 +75,9 @@ defineFunction({
         let style = options.style;
         if (group.value.size === "display") {
             style = Style.DISPLAY;
-        } else if (group.value.size === "text") {
+        } else if (group.value.size === "text" &&
+            style.size === Style.DISPLAY.size) {
+            // We're in a \tfrac but incoming style is displaystyle, so:
             style = Style.TEXT;
         }