;; bo-ewts.mim -- Tibetan input method with EWTS
;; Copyright (C) 2007
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H15PRO112

;; This file is part of the m17n database; a sub-part of the m17n
;; library.

;; The m17n library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public License
;; as published by the Free Software Foundation; either version 2.1 of
;; the License, or (at your option) any later version.

;; The m17n library is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; Lesser General Public License for more details.

;; You should have received a copy of the GNU Lesser General Public
;; License along with the m17n library; if not, write to the Free
;; Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

(input-method bo ewts)

(description "Tibetan input method based on EWTS.
This implementation is based on THDL Extended Wylie Transliteration Scheme
Version 2.0 <http://www.thdl.org/collections/langling/ewts/ewts.php>.")

(variable
 (precomposed
  (_"Flag to tell whether or not to generate precomposed characters.
If 1, generate precomposed characters if available (e.g. \"ྲྀ\"(U+0F76).
If 0, generate only decomposed characters (e.g. \"ྲྀ\" (U+0FB2 U+0F80).")
  0 0 1))

(title "ཀ")

(map
 ;; This map is used also for subjoined consonants.
 (consonant
  ("k" "ཀ")
  ("kh" "ཁ")
  ("g" "ག")
  ("ng" "ང")
  ("c" "ཅ")
  ("ch" "ཆ")
  ("j" "ཇ")
  ("ny" "ཉ")
  ("t" "ཏ")
  ("th" "ཐ")
  ("d" "ད")
  ("n" "ན")
  ("p" "པ")
  ("ph" "ཕ")
  ("b" "བ")
  ("m" "མ")
  ("ts" "ཙ")
  ("tsh" "ཚ")
  ("dz" "ཛ")
  ("w" "ཝ")
  ("zh" "ཞ")
  ("z" "ཟ")
  ("'" "འ")
  ("y" "ཡ")
  ("r" "ར")
  ("l" "ལ")
  ("sh" "ཤ")
  ("s" "ས")
  ("h" "ཧ")
  ("a" "ཨ"))

 ;; Standard Tibetan Stacks listed at:
 ;; <http://www.thdl.org/collections/langling/tibstacks.html>
 (standard-stack
  ("kl" "ཀླ")
  ("kr" "ཀྲ")
  ("kw" "ཀྭ")
  ("ky" "ཀྱ")
  ("khr" "ཁྲ")
  ("khw" "ཁྭ")
  ("khy" "ཁྱ")
  ("gl" "གླ")
  ("gr" "གྲ")
  ("grw" "གྲྭ")
  ("gw" "གྭ")
  ("gy" "གྱ")
  ("cw" "ཅྭ")
  ("nyw" "ཉྭ")
  ("tr" "ཏྲ")
  ("tw" "ཏྭ")
  ("thr" "ཐྲ")
  ("dr" "དྲ")
  ("drw" "དྲྭ")
  ("dw" "དྭ")
  ("pr" "པྲ")
  ("py" "པྱ")
  ("phr" "ཕྲ")
  ("phy" "ཕྱ")
  ("phyw" "ཕྱྭ")
  ("bl" "བླ")
  ("br" "བྲ")
  ("by" "བྱ")
  ("mr" "མྲ")
  ("my" "མྱ")
  ("tsw" "ཙྭ")
  ("tshw" "ཚྭ")
  ("zhw" "ཞྭ")
  ("zl" "ཟླ")
  ("zw" "ཟྭ")
  ("rb" "རྦ")
  ("rd" "རྡ")
  ("rdz" "རྫ")
  ("rg" "རྒ")
  ("rgw" "རྒྭ")
  ("rgy" "རྒྱ")
  ("rj" "རྗ")
  ("rk" "རྐ")
  ("rky" "རྐྱ")
  ("rl" "རླ")
  ("rm" "རྨ")
  ("rmy" "རྨྱ")
  ("rn" "རྣ")
  ("rng" "རྔ")
  ("rny" "རྙ")
  ("rt" "རྟ")
  ("rts" "རྩ")
  ("rtsw" "རྩྭ")
  ("rw" "རྭ")
  ("lb" "ལྦ")
  ("lc" "ལྕ")
  ("ld" "ལྡ")
  ("lg" "ལྒ")
  ("lh" "ལྷ")
  ("lj" "ལྗ")
  ("lk" "ལྐ")
  ("lng" "ལྔ")
  ("lp" "ལྤ")
  ("lt" "ལྟ")
  ("shr" "ཤྲ")
  ("shw" "ཤྭ")
  ("sb" "སྦ")
  ("sbr" "སྦྲ")
  ("sby" "སྦྱ")
  ("sd" "སྡ")
  ("sg" "སྒ")
  ("sgr" "སྒྲ")
  ("sgy" "སྒྱ")
  ("sk" "སྐ")
  ("skr" "སྐྲ")
  ("sky" "སྐྱ")
  ("sl" "སླ")
  ("sm" "སྨ")
  ("smr" "སྨྲ")
  ("smy" "སྨྱ")
  ("sn" "སྣ")
  ("sng" "སྔ")
  ("snr" "སྣྲ")
  ("sny" "སྙ")
  ("sp" "སྤ")
  ("spr" "སྤྲ")
  ("spy" "སྤྱ")
  ("sr" "སྲ")
  ("st" "སྟ")
  ("sts" "སྩ")
  ("sw" "སྭ")
  ("hr" "ཧྲ")
  ("hw" "ཧྭ"))

 (sanskrit
  ("T" "ཊ")
  ("Th" "ཋ")
  ("D" "ཌ")
  ("N" "ཎ")
  ("Sh" "ཥ")
  ("oM" (cond (precomposed "ༀ") (1 "ཨོཾ")))
  ("R+" "ཪ"))

 (force-stack
  ("+"))

 (break-stack
  ("."))

 (special-subjoined
  ("h" (cond ((= precomposed 0) "ྷ")
	     ((= @-1 ?ག) (delete @-1) "གྷ")
	     ((= @-1 ?ད) (delete @-1)  "དྷ")
	     ((= @-1 ?བ) (delete @-1)  "བྷ")
	     ((= @-1 ?ཛ) (delete @-1)  "ཛྷ")
	     (1 "ྷ")))
  ("Sh" (cond ((= precomposed 0) "ྵ")
	      ((= @-1 ?ཀ) (delete @-1) "ཀྵ")
	      (1 "ྵ")))
  ("W" "ྺ")
  ("Y" "ྻ")
  ("R" "ྼ"))

 (vowel
  ("a" "")
  ("i" "ི")
  ("u" "ུ")
  ("e" "ེ")
  ("o" "ོ")
  ("-i" (cond ((= precomposed 0) "ྀ")
	      ((= @-1 ?ྲ) "ྲྀ")
	      ((= @-1 ?ླ) "ླྀ")
	      (1 "ྀ")))
  ("A" "ཱ")
  ("I" "ཱི")
  ("U" "ཱུ")
  ("ai" "ཻ")
  ("au" "ཽ")
  ("r-I" "ཷ")
  ("l-I" "ཹ")
  ("-I" (cond ((= precomposed 0) "ཱྀ")
	      ((= @-1 ?ྲ) "ཷ")
	      ((= @-1 ?ླ) "ཹ")
	      (1 "ཱྀ"))))

 (others
  ;; Numbers
  ("0" "༠")
  ("1" "༡")
  ("2" "༢")
  ("3" "༣")
  ("4" "༤")
  ("5" "༥")
  ("6" "༦")
  ("7" "༧")
  ("8" "༨")
  ("9" "༩")
  ;; These half numbers are not in EWTS but for convenience.
  ("-1" "༪")
  ("-2" "༫")
  ("-3" "༬")
  ("-4" "༭")
  ("-5" "༮")
  ("-6" "༯")
  ("-7" "༰")
  ("-8" "༱")
  ("-9" "༲")
  ("-0" "༳")
  ;; Sanskrit-related marks
  ("H" "ཿ")
  ("M" "ཾ")
  ("~M" "ྃ")
  ("~M`" "ྂ")
  ("?" "྄")
  ("&" "྅")
  ;; Intersyllabic marks
  (" " "་")
  ("*" "༌")
  ;; Phrase deliminating marks
  ("/" "།")
  ("//" "༎")
  (";" "༏")
  ("|" "༑")
  ("!" "༈")
  (":" "༔")
  ("_" " ")
  ("=" "༴")
  ;; Head marks
  ("@" "༄")
  ("#" "༅")
  ("$" "༆")
  ("%" "༇")
  ;; Paired punctuation marks (brackets)
  ("<" "༺")
  (">" "༻")
  ("(" "༼")
  (")" "༽")
  ;; Miscellaneous
  ("~X" "༵")
  ("X" "༷")
  ("^" "༹"))
 
 (escape
  ("\\" (mark @BEG) "\\"))

 (non-tibetan
  ("["))

 (unicode
  ("u" "u" (set MAX-COUNT 4))
  ("U" "U" (set MAX-COUNT 8)))

 (unescape
  ("]"))

 (hexadigit
  ("0" "0")
  ("1" "1")
  ("2" "2")
  ("3" "3")
  ("4" "4")
  ("5" "5")
  ("6" "6")
  ("7" "7")
  ("8" "8")
  ("9" "9")
  ("A" "A") ("a" "A")
  ("B" "B") ("b" "B")
  ("C" "C") ("c" "C")
  ("D" "D") ("d" "D")
  ("E" "E") ("e" "E")
  ("F" "F") ("f" "F"))

 (backspace
  ((Backspace) (undo))))

(state
 (init
  (consonant (shift after-consonant))
  (standard-stack (shift after-consonant))
  (sanskrit (shift after-consonant))
  (vowel (move @<) "ཨ" (move @>) (shift after-vowel))
  (others)
  (escape (shift dispatch-escape))
  (non-tibetan (shift non-tibetan))
  (backsapce))

 (after-consonant
  (force-stack (shift consonant-stack))
  (break-stack (shift init))
  (vowel (shift after-vowel)))
  
 (consonant-stack
  "ཀ+"
  (special-subjoined (shift after-consonant))
  (consonant (set C @-1) (delete @-1) (add C #x50) (insert C)
	     (shift after-consonant))
  (force-stack)
  (nil (pop)))

 (after-vowel
  (force-stack (shift vowel-stack)))

 (vowel-stack
  "ཀ+"
  (vowel (shift after-vowel)))

 (dispatch-escape
  (unicode (shift unicode))
  (nil (delete @BEG) (shift init) (unhandle)))

 (unicode
  "ཀu"
  (t (set COUNT 0) (set UNICODE 0))
  (hexadigit (cond ((> @-1 ?9) (set UNICODE (+ (* UNICODE 16) (- @-1 55))))
		   (1 (set UNICODE (+ (* UNICODE 16) (- @-1 48)))))
	     (set COUNT (+ COUNT 1))
	     (cond ((= COUNT MAX-COUNT) (delete @BEG) (insert UNICODE)
		    (shift init)))))

 (non-tibetan
  "ཀA"
  (unescape (shift init))
  (nil (unhandle))))

;; Local Variables:
;; mode: lisp
;; End:
