From 026b4f55e7102af12a223162803f41b3673a6abf Mon Sep 17 00:00:00 2001
From: chrys87 <chrys87@web.de>
Date: Mon, 28 May 2018 09:59:18 +0200
Subject: [PATCH] Update attributeManager.py

---
 src/fenrirscreenreader/core/attributeManager.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/fenrirscreenreader/core/attributeManager.py b/src/fenrirscreenreader/core/attributeManager.py
index 1b0d3ac6..ce2c15bc 100644
--- a/src/fenrirscreenreader/core/attributeManager.py
+++ b/src/fenrirscreenreader/core/attributeManager.py
@@ -9,7 +9,9 @@ from collections import Counter
 
 class attributeManager():
     def __init__(self):
-        self.setDefaultAttributes()
+        self.currAttributes = None
+        self.prevAttributes = None
+        self.setDefaultAttributes()        
     def initialize(self, environment):
         self.env = environment  
     def shutdown(self):
@@ -165,9 +167,12 @@ class attributeManager():
         # no change
         if oldAttr == newAttr:
             return result,  currCursor
+        # error case
+        if newAttr == None:
+            return result,  currCursor                  
         # special case for pty if not text exists.
         if len(newAttr) == 0:
-            return result,  currCursor
+            return result,  currCursor        
        
         textLines = text.split('\n')