From 1174279967c4ee369d9de1438f18b7e5c748b127 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Uwe=20St=C3=B6hr?= <uwestoehr@lyx.org>
Date: Fri, 9 Mar 2018 04:53:33 +0100
Subject: [PATCH] tex2lyx: parse \xymatrix

LyX's \xymatrix support relies on math therefore put it into math and parse its content

fixes bug #10638
---
 lib/syntax.default   |  1 -
 src/tex2lyx/text.cpp | 13 +++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/syntax.default b/lib/syntax.default
index d9596b6f86..550b6f16b7 100644
--- a/lib/syntax.default
+++ b/lib/syntax.default
@@ -705,7 +705,6 @@ $$
 \vspace{}
 \vspace*{}
 \whiledo{}{}
-\xymatrix{} % this is basically an array => the contents would be parsed badly (bug 8396)
 
 % LaTeX environments.
 % They have always one extra "argument":
diff --git a/src/tex2lyx/text.cpp b/src/tex2lyx/text.cpp
index 8198b82163..2633f74654 100644
--- a/src/tex2lyx/text.cpp
+++ b/src/tex2lyx/text.cpp
@@ -3267,6 +3267,19 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 			continue;
 		}
 
+		if (t.cs() == "xymatrix") {
+			// we must open a new math because LyX's xy support is in math
+			context.check_layout(os);
+			begin_inset(os, "Formula ");
+			os << '$';
+			os << "\\" << t.cs() << '{';
+			parse_math(p, os, FLAG_ITEM, MATH_MODE);
+			os << '}' << '$';
+			end_inset(os);
+			preamble.registerAutomaticallyLoadedPackage("xy");
+			continue;
+		}
+
 		if (t.cs() == "includegraphics") {
 			bool const clip = p.next_token().asInput() == "*";
 			if (clip)
-- 
2.39.5