From 8cf62f9feb609e1ec0297bd28da4a9b0e67b1be3 Mon Sep 17 00:00:00 2001
From: Sengian <sengian1@gmail.com>
Date: Sat, 15 Jan 2011 21:51:37 +0100
Subject: [PATCH] Remove empty tags in info

---
 src/calibre/ebooks/rtf2xml/info.py | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/calibre/ebooks/rtf2xml/info.py b/src/calibre/ebooks/rtf2xml/info.py
index 9f2905f31b..f5f1c5851c 100755
--- a/src/calibre/ebooks/rtf2xml/info.py
+++ b/src/calibre/ebooks/rtf2xml/info.py
@@ -15,7 +15,7 @@
 #                                                                       #
 #                                                                       #
 #########################################################################
-import sys, os, tempfile
+import sys, os, tempfile, re
 
 from calibre.ebooks.rtf2xml import copy
 
@@ -51,6 +51,7 @@ class Info:
         """
         self.__text_string = ''
         self.__state = 'before_info_table'
+        self.rmspace = re.compile(r'\s+')
         self.__state_dict = {
         'before_info_table': self.__before_info_table_func,
         'after_info_table': self.__after_info_table_func,
@@ -167,11 +168,13 @@ class Info:
         """
         if self.__token_info == 'mi<mk<docinf-end':
             self.__state = 'in_info_table'
-            self.__write_obj.write(
-                'mi<tg<open______<%s\n'
-                'tx<nu<__________<%s\n'
-                'mi<tg<close_____<%s\n' % (self.__tag, self.__text_string, self.__tag)
-            )
+            #Don't print empty tags
+            if len(self.rmspace.sub('',self.__text_string)):
+                self.__write_obj.write(
+                    'mi<tg<open______<%s\n'
+                    'tx<nu<__________<%s\n'
+                    'mi<tg<close_____<%s\n' % (self.__tag, self.__text_string, self.__tag)
+                )
             self.__text_string = ''
         elif line[0:2] == 'tx':
             self.__text_string += line[17:-1]