Harald's new codings.

src/GF/Text/ExtendedArabic.hs

@@ -0,0 +1,58 @@
+module ExtendedArabic where
+
+mkExtendedArabic :: String -> String
+mkExtendedArabic = digraphWordToUnicode . adHocToDigraphWord
+
+adHocToDigraphWord :: String -> [(Char, Char)]
+adHocToDigraphWord str = case str of
+  [] -> []
+  '<' : cs -> ('\\', '<') : spoolMarkup cs
+  -- Sorani 
+  'W' : cs -> (':', 'w') : adHocToDigraphWord cs -- ?? Will do
+  'E' : cs -> (' ', 'i') : adHocToDigraphWord cs -- ?? Letter missing!
+  'j' : cs -> ('d', 'j') : adHocToDigraphWord cs
+  'O' : cs -> ('v', 'w') : adHocToDigraphWord cs
+  'F' : cs -> (' ', 'v') : adHocToDigraphWord cs
+  'Z' : cs -> ('z', 'h') : adHocToDigraphWord cs
+  'I' : cs -> (' ', 'i') : adHocToDigraphWord cs -- ?? Letter missing!
+  'C' : cs -> ('c', 'h') : adHocToDigraphWord cs
+  -- Pashto
+  'e' : cs -> (':', 'y') : adHocToDigraphWord cs 
+  '$' : cs -> ('3', 'H') : adHocToDigraphWord cs 
+  'X' : cs -> ('s', '.') : adHocToDigraphWord cs
+  'G' : cs -> ('z', '.') : adHocToDigraphWord cs
+  'a' : cs -> (' ', 'A') : adHocToDigraphWord cs
+  'P' : cs -> ('\'', 'H') : adHocToDigraphWord cs
+  'R' : cs -> ('o', 'r') : adHocToDigraphWord cs 
+   -- Shared
+  'A' : cs -> (' ', 'h') : adHocToDigraphWord cs -- ?? Maybe to "t or 0x06d5
+  'c' : cs -> ('s', 'h') : adHocToDigraphWord cs
+  c : cs -> (' ', c) : adHocToDigraphWord cs
+
+
+-- Beginning 0x621 up and including 0x06d1
+digraphedExtendedArabic = " '~A'A'w,A'i A b\"t tTHdj H X dDH r z ssh S D T Z 3GH__________ - f q k l m n h w i y&a&w&i/a/w/i/W/o/~/'/,/|/6/v_____________#0#1#2#3#4#5#6#7#8#9#%#,#'#*>b>q$|> A2'2,3'A'w'w&y'Tb:b:BoT3b p4b4B'H:H2H\"H3Hch4HTdod.dTD:d:D3d3D4dTrvror.rvRz.:rzh4zs.+s*S:S3S3T33>ff.f: v4f.q3q-k~kok.k3k3K gog:g:G3Gvl.l3l3L:n>nTnon3n?h4H't>Y\"Yow-wvwww|w^w:w3w>y/yvy.w:y3y____ -ae"  
+
+digraphWordToUnicode = map digraphToUnicode
+
+digraphToUnicode :: (Char, Char) -> Char
+digraphToUnicode (c1, c2) = case lookup (c1, c2) cc of Just c' -> c' ; _ -> c2  
+ where 
+   cc = zip allExtendedArabicCodes allExtendedArabic
+
+allExtendedArabicCodes :: [(Char, Char)]
+allExtendedArabicCodes = mkPairs digraphedExtendedArabic
+
+allExtendedArabic :: String
+allExtendedArabic = (map toEnum [0x0621 .. 0x06d1]) 
+
+mkPairs :: String -> [(Char, Char)]
+mkPairs str = case str of
+  [] -> []
+  c1 : c2 : cs -> (c1, c2) : mkPairs cs
+
+spoolMarkup :: String -> [(Char, Char)]
+spoolMarkup s = case s of
+   [] -> [] -- Shouldn't happen
+   '>' : cs -> ('\\', '>') : adHocToDigraphWord cs
+   c1 : cs -> ('\\', c1) : spoolMarkup cs