add getPrevWord and fix some bugs

src/fenrir-package/utils/word_utils.py

@@ -1,5 +1,13 @@
 #!/bin/python
 
+def getPrevWord(currX,currY, currText):
+    if currText == '':
+        return -1, -1, ''
+    x, y, word = getCurrentWord(currX,currY,currText)
+    if (x == currX) or (y == currY) and (word == ''):
+        return currX, currY, '' 
+    return getCurrentWord(x - 2, y, currText)
+
 def getCurrentWord(currX,currY, currText):
     if currText == '':
         return -1, -1, ''
@@ -8,7 +16,15 @@ def getCurrentWord(currX,currY, currText):
     wrappedLines = currText.split('\n')
     wordFound = False
     currWord = ''
-    currLine = wrappedLines[y].replace("\t"," ")
+    if x <= 0:
+        if y != 0:
+            y -= 1
+            currLine = wrappedLines[y].replace("\t"," ")
+        else:
+             return currX, currY, '' 
+        x = len(currLine) - 1
+    else:
+        currLine = wrappedLines[y].replace("\t"," ")
     while not wordFound:
         x = currLine[:x].rfind(" ")
         if x == -1:
@@ -30,7 +46,7 @@ def getCurrentWord(currX,currY, currText):
                 currLine = wrappedLines[y].replace("\t"," ")
             else:
                  return currX, currY, '' 
-            x = len(wrappedLines[y]) - 1
+            x = len(currLine) - 1
         else:
             x -= 1
     return x, y, currWord