module GF.Text.Transliterations ( transliterate, transliteration, characterTable, transliterationPrintNames ) where import Data.Char import Numeric import qualified Data.Map as Map -- transliterations between ASCII and a Unicode character set -- current transliterations: devanagari, thai -- to add a new one: define the Unicode range and the corresponding ASCII strings, -- which may be one or more characters long -- conventions to be followed: -- each character is either [letter] or [letter+nonletters] -- when using a sparse range of unicodes, mark missing codes as "-" in transliterations -- characters can be invisible: ignored in translation to unicode transliterate :: String -> Maybe (String -> String) transliterate s = case s of 'f':'r':'o':'m':'_':t -> fmap appTransFromUnicode $ transliteration t 't':'o':'_':t -> fmap appTransToUnicode $ transliteration t _ -> Nothing transliteration :: String -> Maybe Transliteration transliteration s = Map.lookup s allTransliterations allTransliterations = Map.fromAscList [ ("ancientgreek", transAncientGreek), ("arabic", transArabic), ("devanagari", transDevanagari), ("greek", transGreek), ("hebrew", transHebrew), ("persian", transPersian), ("telugu", transTelugu), ("thai", transThai), ("urdu", transUrdu) ] -- used in command options and help transliterationPrintNames = [(t,printname p) | (t,p) <- Map.toList allTransliterations] characterTable :: Transliteration -> String characterTable = unlines . map prOne . Map.assocs . trans_from_unicode where prOne (i,s) = unwords ["|", showHex i "", "|", [toEnum i], "|", s, "|"] data Transliteration = Trans { trans_to_unicode :: Map.Map String Int, trans_from_unicode :: Map.Map Int String, invisible_chars :: [String], printname :: String } appTransToUnicode :: Transliteration -> String -> String appTransToUnicode trans = concat . map (\c -> maybe c (return . toEnum) $ Map.lookup c (trans_to_unicode trans) ) . filter (flip notElem (invisible_chars trans)) . unchar appTransFromUnicode :: Transliteration -> String -> String appTransFromUnicode trans = concat . map (maybe "?" id . flip Map.lookup (trans_from_unicode trans) ) . map fromEnum mkTransliteration :: String -> [String] -> [Int] -> Transliteration mkTransliteration name ts us = Trans (Map.fromList (tzip ts us)) (Map.fromList (uzip us ts)) [] name where tzip ts us = [(t,u) | (t,u) <- zip ts us, t /= "-"] uzip us ts = [(u,t) | (u,t) <- zip us ts, t /= "-"] unchar :: String -> [String] unchar s = case s of c:d:cs | isAlpha d -> [c] : unchar (d:cs) | isSpace d -> [c]:[d]: unchar cs | otherwise -> let (ds,cs2) = break (\x -> isAlpha x || isSpace x) cs in (c:d:ds) : unchar cs2 [_] -> [s] _ -> [] transThai :: Transliteration transThai = mkTransliteration "Thai" allTrans allCodes where allTrans = words $ "- k k1 - k2 - k3 g c c1 c2 s' c3 y' d' t' " ++ "t1 t2 t3 n' d t t4 t5 t6 n b p p1 f p2 f' " ++ "p3 m y r - l - w s- s. s h l' O h' - " ++ "a. a a: a+ i i: v v: u u: - - - - - - " ++ "e e' o: a% a& L R S T1 T2 T3 T4 K - - - " ++ "N0 N1 N2 N3 N4 N5 N6 N7 N8 N9 - - - - - - " allCodes = [0x0e00 .. 0x0e7f] transDevanagari :: Transliteration transDevanagari = (mkTransliteration "Devanagari" allTransUrduHindi allCodes){invisible_chars = ["a"]} where allCodes = [0x0900 .. 0x095f] allTransUrduHindi = words $ "- M N - - a- A- i- I- u- U- R- - - - e- " ++ "E- - - o- O- k K g G N: c C j J n: t. " ++ "T. d. D. n. t T d D n - p P b B m y " ++ "r - l - - v S s. s h - - r: - A i " ++ "I u U R - - - e E o O - - - - - " ++ "- - - - - - - - - - - z r. - - - " transUrdu :: Transliteration transUrdu = (mkTransliteration "Urdu" allTrans allCodes) where allCodes = [0x0622 .. 0x062f] ++ [0x0630 .. 0x063a] ++ [0x0641 .. 0x0648] ++ [0x0654,0x0658,0x0679,0x067e,0x0686,0x0688,0x0691,0x0698,0x06af,0x06c1,0x06c3,0x06cc,0x06ba,0x06be,0x06d2] allTrans = words $ "A - w^ - y^ a b - t C j H K d " ++ -- 0622 - 062f "Z r z s X S Z- t- z- e G " ++ -- 0630 - 063a "f q k l m n - w " ++ -- 0641 - 0648 "$ n- T p c D R x g h t: y N h- E " -- 0654,658,679,67e,686,688,698,6af,6c1,6c3,6cc,6ba,6be,6d2 transArabic :: Transliteration transArabic = mkTransliteration "Arabic" allTrans allCodes where allTrans = words $ " V A: A? w? A- y? A b t. t v g H K d " ++ -- 0621 - 062f "W r z s C S D T Z c G " ++ -- 0630 - 063a " f q k l m n h w y. y a. u. i. a u " ++ -- 0641 - 064f "i v2 o a: V+ V- i: a+ " ++ -- 0650 - 0657 "A* " -- 0671 (used by AED) allCodes = [0x0621..0x062f] ++ [0x0630..0x063a] ++ [0x0641..0x064f] ++ [0x0650..0x0657] ++ [0x0671] transPersian :: Transliteration transPersian = (mkTransliteration "Persian/Farsi" allTrans allCodes) {invisible_chars = ["a","u","i"]} where allTrans = words $ " V A: A? w? A- y? A b t. t t- j H K d " ++ -- 0621 - 062f "W r z s C S D T Z c G " ++ -- 0630 - 063a " f q k l m n h v y. y a. u. i. a u " ++ -- 0641 - 064f "i v2 o a: V+ V- i: a+ " ++ -- 0650 - 0657 "p c^ J g " allCodes = [0x0621..0x062f] ++ [0x0630..0x063a] ++ [0x0641..0x064f] ++ [0x0650..0x0657] ++ [0x067e,0x0686,0x0698,0x06af] transHebrew :: Transliteration transHebrew = mkTransliteration "unvocalized Hebrew" allTrans allCodes where allTrans = words $ "A b g d h w z H T y K k l M m N " ++ "n S O P p Z. Z q r s t - - - - - " ++ "w2 w3 y2 g1 g2" allCodes = [0x05d0..0x05f4] transTelugu :: Transliteration transTelugu = mkTransliteration "Telugu" allTrans allCodes where allTrans = words $ "- c1 c2 c3 - A A: I I: U U: R_ L_ - E E: " ++ "A' - O O: A_ k k. g g. n. c c. j j. n' T " ++ "T. d d. N t t. d d. n - p p. b b. m y " ++ "r R l L - v s' S s h - - - c5 a: i " ++ "i: u u: r_ r. - e e: a' - o o: a_ c6 - - " ++ "- - - - - c7 c8 z Z - - - - - - - " ++ "R+ L+ l+ l* - - n0 n1 n2 n3 n4 n5 n6 n7 n8 n9 " allCodes = [0x0c00 .. 0x0c7f] transGreek :: Transliteration transGreek = mkTransliteration "modern Greek" allTrans allCodes where allTrans = words $ "- - - - - - A' - E' H' I' - O' - Y' W' " ++ "i= A B G D E Z H V I K L M N X O " ++ "P R - S T Y F C Q W I- Y- a' e' h' i' " ++ "y= a b g d e z h v i k l m n x o " ++ "p r s* s t y f c q w i- y- o' y' w' - " allCodes = [0x0380 .. 0x03cf] transAncientGreek :: Transliteration transAncientGreek = mkTransliteration "ancient Greek" allTrans allCodes where allTrans = words $ "- - - - - - - - - - - - - - - - " ++ "i= A B G D E Z H V I K L M N X O " ++ "P R - S T Y F C Q W I- Y- - - - - " ++ "y= a b g d e z h v i k l m n x o " ++ "p r s* s t y f c q w i- y- - - - - " ++ "a) a( a)` a(` a)' a(' a)~ a(~ A) A( A)` A(` A)' A(' A)~ A(~ " ++ "e) e( e)` e(` e)' e(' - - E) E( E)` E(` E)' E(' - - " ++ "h) h( h)` h(` h)' h(' h)~ h(~ H) H( H)` H(` H)' H(' H)~ H(~ " ++ "i) i( i)` i(` i)' i(' i)~ i(~ I) I( I)` I(` I)' I(' I)~ I(~ " ++ "o) o( o)` o(` o)' o(' - - O) O( O)` O(` O)' O(' - - " ++ "y) y( y)` y(` y)' y(' y)~ y(~ - Y( - Y(` - Y(' - Y(~ " ++ "w) w( w)` w(` w)' w(' w)~ w(~ W) W( W)` W(` W)' W(' W)~ W(~ " ++ "a` a' e` e' h` h' i` i' o` o' y` y' w` w' - - " ++ "a|( a|) a|)` a|(` a|)' a|(' a|)~ a|(~ - - - - - - - - " ++ -- 1f80- "h|( h|) h|)` h|(` h|)' h|(' h|)~ h|(~ - - - - - - - - " ++ -- 1f90- "w|( w|) w|)` w|(` w|)' w|(' w|)~ w|(~ - - - - - - - - " ++ -- 1fa0- "a. a_ a|` a| a|' - a~ a|~ - - - - - - - - " ++ -- 1fb0- "- - h|` h| h|' - h~ h|~ - - - - - - - - " ++ -- 1fc0- "i. i_ i=` i=' - - i~ i=~ - - - - - - - - " ++ -- 1fd0- "y. y_ y=` y=' r) r( y~ y|~ - - - - - - - - " ++ -- 1fe0- "- - w|` w| w|' - w~ w|~ - - - - - - - - " -- 1ff0- allCodes = [0x0380 .. 0x03cf] ++ [0x1f00 .. 0x1fff]