From f50a1f68ea71c9e91fa7e91b7f4ef3a7652b8ce3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20K=C3=BCmmel?= <syntheticpp@gmx.net>
Date: Sat, 13 Dec 2008 15:11:34 +0000
Subject: [PATCH] Could not convert file: don't warn me to death

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@27869 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/Converter.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Converter.cpp b/src/Converter.cpp
index ab7e51f912..b9c31bd00e 100644
--- a/src/Converter.cpp
+++ b/src/Converter.cpp
@@ -302,6 +302,14 @@ bool Converters::convert(Buffer const * buffer,
 				return true;
 			}
 		}
+
+		// only warn once per session and per file type
+		static std::map<string, string> warned;
+		if (warned.find(from_format) != warned.end() && warned.find(from_format)->second == to_format) {
+			return false;
+		}
+		warned.insert(make_pair(from_format, to_format));
+
 		Alert::error(_("Cannot convert file"),
 			     bformat(_("No information for converting %1$s "
 						    "format files to %2$s.\n"