From 1f6370dfd79529ddb180bed3720c8dff895e614b Mon Sep 17 00:00:00 2001
From: Enrico Forestieri <forenr@lyx.org>
Date: Tue, 9 Nov 2010 00:03:32 +0000
Subject: [PATCH] Fix bug #6939 (Using math-insert to input math macros
 overwrites math expressions)

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@36216 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/Cursor.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Cursor.cpp b/src/Cursor.cpp
index c2b6d72989..a76c68fae3 100644
--- a/src/Cursor.cpp
+++ b/src/Cursor.cpp
@@ -1353,6 +1353,15 @@ void Cursor::niceInsert(MathAtom const & t)
 		MathData ar(buffer());
 		asArray(safe, ar);
 		insert(ar);
+	} else if (t->asMacro() && !safe.empty()) {
+		MathData ar(buffer());
+		asArray(safe, ar);
+		docstring const name = t->asMacro()->name();
+		MacroData const * data = buffer()->getMacro(name);
+		if (data && data->numargs() - data->optionals() > 0) {
+			plainInsert(MathAtom(new InsetMathBrace(ar)));
+			posBackward();
+		}
 	}
 }
 
-- 
2.39.2