tweak char and line utils

src/fenrir/core/outputManager.py

@@ -24,6 +24,8 @@ class outputManager():
         self.env['runtime']['settingsManager'].shutdownDriver('brailleDriver')
         
     def presentText(self, text, interrupt=True, soundIcon = '', ignorePunctuation=False, announceCapital=False):
+        if text == '':
+            return
         self.env['runtime']['debug'].writeDebugOut("presentText:\nsoundIcon:'"+soundIcon+"'\nText:\n" + text ,debug.debugLevel.INFO)
         if self.playSoundIcon(soundIcon, interrupt):
             self.env['runtime']['debug'].writeDebugOut("soundIcon found" ,debug.debugLevel.INFO)            

src/fenrir/utils/char_utils.py

@@ -15,7 +15,7 @@ def getPrevChar(currX,currY, currText):
     x = currX
     y = currY  
     if x - 1 < 0:
-        if y - 1 > 0:
+        if y - 1 >= 0:
             y -= 1
             x = len(wrappedLines[y]) - 1
             lineBreak = True
@@ -24,6 +24,8 @@ def getPrevChar(currX,currY, currText):
             endOfScreen = True
     else:
         x -= 1
+    currChar = ''
+    if not endOfScreen:
         currChar = wrappedLines[y][x]        
     return x, y, currChar, endOfScreen, lineBreak
 
@@ -44,6 +46,8 @@ def getUpChar(currX,currY, currText):
         currY = 0 
     else:
         endOfScreen = True                
+    currChar = ''
+    if not endOfScreen:
         currChar = wrappedLines[currY][currX]
     return currX, currY, currChar, endOfScreen
 
@@ -57,6 +61,8 @@ def getDownChar(currX,currY, currText):
         currY = len(wrappedLines) -1
     else:
         endOfScreen = True             
+    currChar = ''
+    if not endOfScreen:
         currChar = wrappedLines[currY][currX]       
     return currX, currY, currChar, endOfScreen
 
@@ -89,6 +95,8 @@ def getNextChar(currX,currY, currText):
             endOfScreen = True
     else:
         x += 1    
+    currChar = ''
+    if not endOfScreen:
         currChar = wrappedLines[y][x]                 
     return x, y, currChar, endOfScreen, lineBreak
 

src/fenrir/utils/line_utils.py

@@ -19,6 +19,8 @@ def getPrevLine(currX,currY, currText):
     else:
         endOfScreen = True        
     x = 0
+    currLine = ''
+    if not endOfScreen:
         currLine = wrappedLines[y]                   
     return x, y, currLine, endOfScreen
 
@@ -44,5 +46,7 @@ def getNextLine(currX,currY, currText):
     else:
         endOfScreen = True
     x = 0
+    currLine = ''
+    if not endOfScreen:
         currLine = wrappedLines[y]     
     return x, y, currLine, endOfScreen