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Filename : si-wijesekera.mim
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;; si-wijesekera.mim -- Sinhala input method with wijesekera method
;; Copyright (C) 2005, 2006, 2008, 2009, 2011
;;   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 si wijesekera (version "1.6.0"))

(description "Sinhala input method based on SLS 1134 Rev. 2:2004.
  <http://www.siyabas.lk/docs/sin-kbd-layout5.pdf>
Although this code supports both surrounding text and preedit,
the former is disabled by default to avoid confusion caused by
faulty applications.
")

(title "සි")

(variable
 (use-surrounding-text (_"Surrounding text vs. preedit.
If 1, try to use surrounding text.  Otherwise, use preedit.")
		       0 1 0))

(macro
 ;; skip following (virama zwj consonant)* sequence
 (forward
  (set cc3 @+2)
  (cond
   ((& (= @+0 0x0DCA) (= @+1 0x200D) (>= cc3 0x0D9A) (<= cc3 0x0DC6))
    (delete @+3)
    0x0DCA 0x200D
    (insert cc3)
    (forward))))

 (backward
  (set cc1 @-1)
  (cond
   ((& (= @-3 0x0DCA) (= @-2 0x200D) (>= cc1 0x0D9A) (<= cc1 0x0DC6))
    (delete @-3)
    0x0DCA
    0x200D
    (insert cc1)
    (move @<)
    (backward))))

 (delete-preceding-zw
  (cond
   ((| (= @-1 0x200C) (= @-1 0x200D))
    (delete @-1)
    (delete-preceding-zw))))

 (delete-following-zw
  (cond
   ((| (= @+0 0x200C) (= @+0 0x200D))
    (delete @+1)
    (delete-following-zw))))

 (merge-kombuva
  (delete @-1)
  (delete @+2)
  (insert c1)))

(map
 (starter
  ("A") ("B") ("C") ("D") ("E") ("F") ("G") ("H") ("I") ("J") ("K") ("L") ("M")
  ("N") ("O") ("P") ("Q") ("R") ("S") ("T") ("U") ("V") ("W") ("X") ("Y") ("Z") 
  ("a") ("b") ("c") ("d") ("e") ("f") ("g") ("h") ("i") ("j") ("k") ("l") ("m")
  ("n") ("o") ("p") ("q") ("r") ("s") ("t") ("u") ("v") ("w") ("x") ("y") ("z") 
  ("`") ("~") ("\[") ("{") ("\]") ("}") ("\\") ("|") (";") (":") ("'") ("\"")
  (",") ("<") (".") (">")
  ((A-a)) ((A-c)) ((A-o)) ((A-v)) ((A-x)) ((A-z)) ((A-\ )) ((A-.)) ((A-,)) ((A-\'))
  ((G-a)) ((G-c)) ((G-o)) ((G-v)) ((G-x)) ((G-z)) ((G-\ )) ((G-.)) ((G-,)) ((G-\'))
  ((S-\ )) ((BackSpace)) ((Delete)))

  (consonant
   ("l" "ක")				; 0D9A
   ("L" "ඛ")				; 0D9B
   ("." "ග")				; 0D9C
   (">" "ඝ")				; 0D9D
   ("X" "ඞ")				; 0D9E
   ((A-.) "ඟ")				; 0D9F
   ((G-.) "ඟ")				; 0D9F
   ("p" "ච")				; 0DA0
   ("P" "ඡ")				; 0DA1
   ("c" "ජ")				; 0DA2
   ("C" "ඣ")				; 0DA3
   ("\[" "ඤ")				; 0DA4
   ("{" "ඥ")				; 0DA5
   ((A-c) "ඦ")				; 0DA6
   ((G-c) "ඦ")				; 0DA6
   ("g" "ට")				; 0DA7
   ("G" "ඨ")				; 0DA8
   ("v" "ඩ")				; 0DA9
   ("V" "ඪ")				; 0DAA
   ("K" "ණ")				; 0DAB
   ((A-v) "ඬ")				; 0DAC
   ((G-v) "ඬ")				; 0DAC
   (";" "ත")				; 0DAD
   (":" "ථ")				; 0DAE
   ("o" "ද")				; 0DAF
   ("O" "ධ")				; 0DB0
   ("k" "න")				; 0DB1
   ((A-o) "ඳ")				; 0DB3
   ((G-o) "ඳ")				; 0DB3
   ("m" "ප")				; 0DB4
   ("M" "ඵ")				; 0DB5
   ("n" "බ")				; 0DB6
   ("N" "භ")				; 0DB7
   ("u" "ම")				; 0DB8
   ("U" "ඹ")				; 0DB9
   ("h" "ය")				; 0DBA
   ("r" "ර")				; 0DBB
   ("," "ල")				; 0DBD
   ("j" "ව")				; 0DC0
   ("Y" "ශ")				; 0DC1
   ("I" "ෂ")				; 0DC2
   ("i" "ස")				; 0DC3
   ("y" "හ")				; 0DC4
   ("<" "ළ")				; 0DC5
   ("F" "ෆ")				; 0DC6
   )

  (misc
   ("x" "ං")				; 0D82
   ((A-x) "ඃ")				; 0D83
   ((G-x) "ඃ")				; 0D83

   ("w" "අ")				; 0D85
   ("b" "ඉ")				; 0D89
   ("B" "ඊ")				; 0D8A
   ("W" "උ")				; 0D8B
   ("R" "ඍ")				; 0D8D
   ((A-,) "ඏ")				; 0D8F
   ((G-,) "ඏ")				; 0D8F

   ("T" "ඔ")				; 0D94

   ("s" "ි")				; 0DD2
   ("S" "ී")				; 0DD3
   ("q" "ු")				; 0DD4

   ("Q" "ූ")				; 0DD6

   ((A-a) "ෳ")				; 0DF3
   ((G-a) "ෳ")				; 0DF3
   ((A-\') "෴")				; 0DF4
   ((G-\') "෴")				; 0DF4

   ("\]" ";")
   ("}" ":")
   ("'" ".")
   ("\"" ",")
   ("z" "'")
   ("Z" "\"")

   ("|" "‍්")				; touch (ZWJ 0DCA)
   ("J" "ළු")				; muurdhaja lu (0DC5 0DD4)
   ((S-\ ) " ")				; NBSP
   ((A-\ ) "‌")				; ZWNJ
   ((G-\ ) "‌")				; ZWNJ

   ("t"
    (set c @-2)
    (cond
     ((= @-1 0x0DD9)
      (cond
       ((= c 0x200C)
	(delete @-2)
	0x0D93)
       ((| (< c 0x0D9A) (> c 0x0DC6))
	(delete @-1)
	0x0D93)
       (1
	0x0D91)))
     (1
      0x0D91)))

   ("a"
    (set c @-1)
    (cond
     ((= c 0x0D91)
      (delete @-1)
      0x0D92)
     ((= c 0x0D94)
      (delete @-1)
      0x0D95)
     ((= c 0x0DD9)
      (delete @-1)
      0x0DDA)
     ((= c 0x0DDC)
      (delete @-1)
      0x0DDD)
     (1
      0x0DCA)))

   ("d"
    (set c @-1)
    (cond
     ((= c 0x0D85)
      (delete @-1)
      0x0D86)
     ((= c 0x0DD9)
      (delete @-1)
      0x0DDC)
     (1
      0x0DCF)))

   ("e"
    (cond
     ((= @-1 0x0D85)
      (delete @-1)
      0x0D87)
     (1
      0x0DD0)))

   ("E"
    (set c @-1)
    (cond
     ((= c 0x0D85)
      (delete @-1)
      0x0D88)
     ((= c 0x0DD4)
      (cond
       ((= @-2 0x0DC5)
	(delete @-1)
	0x0DD6)
       (1
	0x0DD1)))
     (1
      0x0DD1)))     

   ("D"
    (set c @-1)
    (cond
     ((= c 0x0D8D)
      (delete @-1)
      0x0D8E)
     ((= c 0x0DD8)
      (delete @-1)
      0x0DF2)
     (1
      0x0DD8)))

   ("A"
    (set c @-1)
    (cond
     ((= c 0x0D8B)
      (delete @-1)
      0x0D8C)
     ((= c 0x0D8F)
      (delete @-1)
      0x0D90)
     ((= c 0x0D94)
      (delete @-1)
      0x0D96)
     ((= c 0x0DD9)
      (delete @-1)
      0x0DDE)
     (1
      0x0DDF)))

   ("f"
    (set c @+0)
    (cond
     ((& (>= c 0x0D9A) (<= c 0x0DC6))
      (delete @+1)
      (insert c)
      (forward)
      (set c @+0)
      (cond
       ((= c 0x0DCA)
	(delete @+1)
	0x0DDA)
       ((= c 0x0DD9)
	(delete @+1)
	0x0DDB)
       ((= c 0x0DCF)
	(delete @+1)
	0x0DDC)
       ((= c 0x0DDF)
	(delete @+1)
	0x0DDE)
       (1
	0x0DD9)))
     ((= c 0x0D91)
      (delete @+1)
      0x0D93)
     ((= c 0x0DD9)
      (delete @+1)
      0x0DDB)
     ((& (= c 0x200C) (= @+1 0x0DD9))
      (delete @+2)
      0x200C 0x0DDB)
     ((& (= @-1 0x0DD9)
	 (| (< @-2 0x0D9A) (> @-2 0x0DC6)))
      (delete @-1)
      0x0DDB)
     ((& (>= @-1 0x0D9A) (<= @-1 0x0DC6))
      0x200C 0x0DD9)
     (1
      0x0DD9)))
   
   ;; sanyaka letters
   ((A-z)
    (set c @-1)
    (cond
     ((= c 0x0DAF)
      (delete @-1)
      0x0DB3)
     ((= c 0x0D9C)
      (delete @-1)
      0x0D9F)
     ((= c 0x0DA9)
      (delete @-1)
      0x0DAC)
     ((= c 0x0DA2)
      (delete @-1)
      0x0DA6)))
   
   ;; sanyaka letters
   ((G-z)
    (set c @-1)
    (cond
     ((= c 0x0DAF)
      (delete @-1)
      0x0DB3)
     ((= c 0x0D9C)
      (delete @-1)
      0x0D9F)
     ((= c 0x0DA9)
      (delete @-1)
      0x0DAC)
     ((= c 0x0DA2)
      (delete @-1)
      0x0DA6)))

   ;; yansaya
   ("H"
    (set c @-1)
    (cond
     ((= c 0x0DD9)
      (delete @-1))
     ((= c 0x0DDB)
      (delete @-1))
     (1
      (set c 0)))
    (cond
     ((& (>= @-1 0x0D9A) (<= @-1 0x0DC6))
      0x0DCA 0x200D 0x0DBA))
    (cond
     ((> c 0)
      (insert c))))

   ;; rakaransaya
   ("`"
    (set c @-1)
    (cond
     ((| (= c 0x0DD9) (= c 0x0DDB) (= c 0x0DD2) (= c 0x0DD3))
      (delete @-1))
     (1
      (set c 0)))
    (cond
     ((& (>= @-1 0x0D9A) (<= @-1 0x0DC6))
      0x0DCA 0x200D 0x0DBB))
    (cond
     ((> c 0)
      (insert c))))

   ;; repaya
   ("~"
    (set c @-1)
    (cond
     ((| (= c 0x0DD9) (= c 0x0DDB))
      (delete @-1))
     (1
      (set c 0)))
    (backward)
    (cond
     ((& (>= @-1 0x0D9A) (<= @-1 0x0DC6))
      (set c1 @-1)
      (delete @-1)
      (insert c1)
      (move @<)
      0x0DBB 0x0DCA 0x200D))
    (cond
     ((> c 0)
      (move @>)
      (insert c))))

   ((BackSpace)
    (delete-preceding-zw)
    (set c @-1)
    (cond
     ((< c 0)
      (unhandle)))
    (delete @-1)
    (cond
     ((= c 0x0D86)
      0x0D85)
     ((= c 0x0D87)
      0x0D85)
     ((= c 0x0D88)
      0x0D85)
     ((= c 0x0D8C)
      0x0D8B)
     ((= c 0x0D8E)
      0x0D8D)
     ((= c 0x0D90)
      0x0D8F)
     ((= c 0x0D92)
      0x0D8F)
     ((= c 0x0D93)
      (cond ((& (>= @-1 0x0D9A) (<= @-1 0x0DC6)) 0x200C))
      0x0DD9)
     ((= c 0x0D95)
      0x0D94)
     ((= c 0x0D96)
      0x0D94)

     ((& (>= c 0x0D9A) (<= c 0x0DC6) (= @-2 0x0DCA) (= @-1 0x200D))
      (cond
       ((= @-3 0x0DBB)
	(delete @-3)
	(insert c))
       (1
	(delete @-2))))

     ((= c 0x0DD9)
      (cond
       ((| (< @-1 0x0D9A) (> @-1 0x0DC6)))
       ((= @+0 0x0D91)
	(delete @-1)
	(delete @+1)
	0x0D93)
       ((& (>= @+0 0x0D9A) (<= @+0 0x0DC6))
	(set c1 @+0)
	(cond
	 ((= @+1 0x0DD9)
	  (merge-kombuva)
	  0x0DDB)
	 ((= @+1 0x0DCA)
	  (merge-kombuva)
	  0x0DDA)
	 ((= @+1 0x0DCF)
	  (merge-kombuva)
	  0x0DDC)
	 ((= @+1 0x0DDF)
	  (merge-kombuva)
	  0x0DDE)
	 (1
	  (delete @-1)
	  (delete @+1)
	  (insert c1)
	  0x0DD9)))
       ((& (>= @-2 0x0D9A) (<= @-2 0x0DC6))
	(delete @-1)
	0x200C
	0x0DD9)
       ((& (= @-4 0x0DBB) (= @-3 0x0DCA) (= @-2 0x200D))
	(set c1 @-1)
	(delete @-4)
	(insert c1)
	0x0DD9)
       ((& (>= @-4 0x0D9A) (<= @-4 0x0DC6) (= @-3 0x0DCA) (= @-2 0x200D))
	(delete @-3)
	0x0DD9)
       (1
	(delete @-1)
	0x0DD9)))

     ((= c 0x0DDA)
      0x0DD9)

     ((= c 0x0DDB)
      (cond
       ((| (< @-1 0x0D9A) (> @-1 0x0DC6))
	0x0DD9)
       ((& (>= @-2 0x0D9A) (<= @-2 0x0DC6))
	(delete @-1)
	0x200C
	0x0DDB)
       ((& (= @-4 0x0DBB) (= @-3 0x0DCA) (= @-2 0x200D))
	(set c1 @-1)
	(delete @-4)
	(insert c1)
	0x0DDB)
       ((& (>= @-4 0x0D9A) (<= @-4 0x0DC6) (= @-3 0x0DCA) (= @-2 0x200D))
	(delete @-3)
	0x0DDB)
       (1
	(delete @-1)
	0x0DDB)))

     ((= c 0x0DDC)
      0x0DD9)
     ((= c 0x0DDD)
      0x0DDC)
     ((= c 0x0DDE)
      0x0DD9)
     ((= c 0x0DF2)
      0x0DD8))

    (cond
     ((& (>= @-1 0x0D9A)
	 (<= @-1 0x0DC6)
	 (| (= @+0 0x0DD9) (= @+0 0x0DDB)))
      0x200C)))

   ((Delete)
    (delete-following-zw)
    (set c @+0)
    (cond
     ((< c 0)
      (unhandle)))
    (delete @+1)
    (cond
     ((= c 0x0D86)
      0x0DCF)
     ((= c 0x0D87)
      0x0DD0)
     ((= c 0x0D88)
      0x0DD1)
     ((= c 0x0D8C)
      0x0DDF)
     ((= c 0x0D8E)
      0x0DD8)
     ((= c 0x0D90)
      0x0DDF)
     ((= c 0x0D92)
      0x0DCA)
     ((= c 0x0D93)
      0x0D91)
     ((& (>= c 0x0D9A) (<= c 0x0DC6))
      (forward)
      (cond
       ((= @+0 0x0DD9)
	(delete @+1)
	(move @<)
	(insert c))
       ((= @+0 0x0DDB)
	(delete @+1)
	0x0DD9
	(move @<)
	(insert c))
       ((= @+0 0x0DDA)
	(delete @+1)
	0x0DCA
	(move @<)
	(insert c))
       ((= @+0 0x0DDC)
	(delete @+1)
	0x0DCF
	(move @<)
	(insert c))
       ((= @+0 0x0DDE)
	(delete @+1)
	0x0DDF
	(move @<)
	(insert c))
       (1
	(delete @<))))
     ((= c 0x0DDB)
      0x0DD9))))

  (independent
   ("w" "අ")				; 0D85
   ("b" "ඉ")				; 0D89
   ("B" "ඊ")				; 0D8A
   ("W" "උ")				; 0D8B
   ("R" "ඍ")				; 0D8D
   ((A-,) "ඏ")				; 0D8F
   ((G-,) "ඏ")				; 0D8F
   ("t" "එ")				; 0D91
   ("T" "ඔ")				; 0D94
   ("l" "ක")				; 0D9A
   ("L" "ඛ")				; 0D9B
   ("." "ග")				; 0D9C
   (">" "ඝ")				; 0D9D
   ("X" "ඞ")				; 0D9E
   ((A-.) "ඟ") ((0x2E A-z) "ඟ")		; 0D9F
   ((G-.) "ඟ") ((0x2E G-z) "ඟ")		; 0D9F
   ("p" "ච")				; 0DA0
   ("P" "ඡ")				; 0DA1
   ("c" "ජ")				; 0DA2
   ("C" "ඣ")				; 0DA3
   ("\[" "ඤ")				; 0DA4
   ("{" "ඥ")				; 0DA5
   ((A-c) "ඦ") ((0x63 A-z) "ඦ")		; 0DA6
   ((G-c) "ඦ") ((0x63 G-z) "ඦ")		; 0DA6
   ("g" "ට")				; 0DA7
   ("G" "ඨ")				; 0DA8
   ("v" "ඩ")				; 0DA9
   ("V" "ඪ")				; 0DAA
   ("K" "ණ")				; 0DAB
   ((A-v) "ඬ") ((0x76 A-z) "ඬ")		; 0DAC
   ((G-v) "ඬ") ((0x76 G-z) "ඬ")		; 0DAC
   (";" "ත")				; 0DAD
   (":" "ථ")				; 0DAE
   ("o" "ද")				; 0DAF
   ("O" "ධ")				; 0DB0
   ("k" "න")				; 0DB1
   ((A-o) "ඳ") ((0x6F A-z) "ඳ")		; 0DB3
   ((G-o) "ඳ") ((0x6F G-z) "ඳ")		; 0DB3
   ("m" "ප")				; 0DB4
   ("M" "ඵ")				; 0DB5
   ("n" "බ")				; 0DB6
   ("N" "භ")				; 0DB7
   ("u" "ම")				; 0DB8
   ("U" "ඹ")				; 0DB9
   ("h" "ය")				; 0DBA
   ("r" "ර")				; 0DBB
   ("," "ල")				; 0DBD
   ("j" "ව")				; 0DC0
   ("Y" "ශ")				; 0DC1
   ("I" "ෂ")				; 0DC2
   ("i" "ස")				; 0DC3
   ("y" "හ")				; 0DC4
   ("<" "ළ")				; 0DC5
   ("F" "ෆ")				; 0DC6
   ((A-\') "෴")				; 0DF4
   ((G-\') "෴")				; 0DF4

   ("J" "ළු")				; muurdhaja lu (0DC5 0DD4)

   ((S-\ ) " ")				; NBSP (00A0)
   ((A-\ ) "‌")				; ZWNJ (200C)
   ((G-\ ) "‌")				; ZWNJ (200C)

   ("\]" ";")
   ("}" ":")
   ("'" ".")
   ("\"" ",")
   ("z" "'")
   ("Z" "\"")
   )

  (dependent
   ("x" "ං")				; 0D82
   ((A-x) "ඃ")				; 0D83
   ((G-x) "ඃ")				; 0D83
   ("a"
    (cond
     ((= @-1 0x0D91) (delete @-) "ඒ")	; 0D92
     ((= @-1 0x0D94) (delete @-) "ඕ")	; 0D95
     ((= @-1 0x0DD9) (delete @-) "ේ")	; 0DDA
     ((= @-1 0x0DDC) (delete @-) "ෝ")	; 0DDD
     (1 "්")))				; 0DCA
   ("d"
    (cond
     ((= @-1 0x0D85) (delete @-) "ආ")	; 0D86
     ((= @-1 0x0DD9) (delete @-) "ො")	; 0DDC
     (1 "ා")))				; 0DCF
   ("e"
    (cond
     ((= @-1 0x0D85) (delete @-) "ඇ")	; 0D87
     (1 "ැ")))				; 0DD0
   ("E"
    (cond
     ((= @-1 0x0D85) (delete @-) "ඈ")	; 0D88
     ((& (= @-2 0x0DC5) (= @-1 0x0DD4))
      (delete @-) "ූ")			; 0DD6
     (1 "ෑ")))				; 0DD1
   ("s" "ි")				; 0DD2
   ("S" "ී")				; 0DD3
   ("q" "ු")				; 0DD4
   ("Q" "ූ")				; 0DD6

   ("D"
    (cond
     ((= @-1 0x0D8D) (delete @-) "ඎ")	; 0D8E
     ;; The following line does not work when no consonant proceeds.
     ;;    ((= @-1 0x0DD8) (delete @-) "ෲ")	; 0DF2
     (1 "ෘ")))				; 0DD8
   ;; This one works with or without a preceeding consonant.
   ("DD" "ෲ") 				; 0DF2

   ("A"
    (cond
     ((= @-1 0x0D8B) (delete @-) "ඌ")	; 0D8C
     ((= @-1 0x0D8F) (delete @-) "ඐ")	; 0D90
     ((= @-1 0x0D94) (delete @-) "ඖ")	; 0D96
     ((= @-1 0x0DD9) (delete @-) "ෞ")	; 0DDE
     (1 "ෟ")))				; 0DDF
   ((A-a) "ෳ")				; 0DF3
   ((G-a) "ෳ")				; 0DF3

   ("H"					; yansaya (0DCA 200D 0DBA)
    (cond
     ((| (= @-1 0x0DD9) (= @-1 0x0DDB))
      (move @-) "්‍ය" (move @>))
     (1
      "්‍ය")))

   ("`"					; rakaransaya (0DCA 200D 0DBB)
    (cond
     ((| (= @-1 0x0DD2) (= @-1 0x0DD3) (= @-1 0x0DD9) (= @-1 0x0DDB))
      (move @-) "්‍ර" (move @>))
     (1 "්‍ර")))

   ("~"					; repaya (0DBB 0DCA 200D)
    (move @<)
    "ර්‍"
    (move @>))
   )

  (kombuva
   ("f" "ෙ"))				; 0DD9

  (join
   ("\\"))

  (backspace
   ((BackSpace))))

(state
 (init
  (starter
   (pushback 1)
   (cond
    ((& (= use-surrounding-text 1) (= @-0 -1))
     (shift surrounding-text))
    (1
     (shift preedit)))))

 (surrounding-text
  (consonant
   (move @<)
   (cond
    ((= @-1 0x0DD9)
     (cond
      ((= @-2 0x200C)
       (delete @-2)
       (move @>)
       0x0DD9)
      ((| (< @-2 0x0D9A) (> @-2 0x0DC6))
       (delete @-1)
       (move @>)
       0x0DD9)))
    ((= @-1 0x0DDB)
     (cond
      ((= @-2 0x200C)
       (delete @-2)
       (move @>)
       0x0DDB)
      ((| (< @-2 0x0D9A) (> @-2 0x0DC6))
       (delete @-1)
       (move @>)
       0x0DDB))))
   (commit))
  (misc
   (commit))
  (join
   (shift join)))

 (join
  (consonant
   (move @<)
   (set c @-1)
   (cond
    ((| (= c 0x0DD9) (= c 0x0DDB))
     (cond
      ((& (>= @-2 0x0D9A) (<= @-2 0x0DC6))
       (delete @-1)
       0x0DCA 0x200D
       (move @>)
       (insert c))))
    ((& (>= c 0x0D9A) (<= c 0x0DC6))
     0x0DCA 0x200D))
   (commit)
   (shift surrounding-text))

  (nil
   (commit)
   (shift surrounding-text)))

 (preedit
  (independent
   (shift independent-state))
  (kombuva
   (shift kombuva-state))
  (dependent)
  (nil
   (unhandle)))

 (independent-state
  (dependent)
  (join
   (cond
    ((| (= @-1 0x0DD9) (= @-1 0x0DDB))
     (shift join-state))
    ((| (< @-1 0x0D9A) (> @-1 0x0DC6))
     (undo -1))
    (1
     (shift join-state))))
  (backspace
   (undo)))

 (join-state
  (t
   (mark p))
  (independent
   (move p)
   (set c @-1)
   (cond
    ((| (= c 0x0DD9) (= c 0x0DDB))
     (delete @-)
     "්‍"				; 0DCA 200D
     (move @>)
     (insert c))
    (1
     "්‍"				; 0DCA 200D
     (move @>)))
   (shift independent-state))
  (backspace
   (undo)))

 (kombuva-state
  (t
   (mark p))
  (independent
   (cond
    ((& (= @0 0x0DD9) (= @1 0x0D91))
     (delete @<)
     "ඓ"				; 0D93
     (shift independent-state))
    ((& (= @0 0x0DD9) (< @2 0))
     (move @0)
     (delete @+)
     (move @>)
     "ෙ"				; 0DD9
     (shift independent-state))
    ((& (= @0 0x0DDB) (< @2 0))
     (move @0)
     (delete @+)
     (move @>)
     "ෛ"				; 0DDB
     (shift independent-state))
    (1
     (delete p)
     (pushback 1)
     (shift preedit))))
  (kombuva
   (mark p)
   (cond
    ((& (= @0 0x0DD9) (< @2 0))
     (delete @<)
     "ෛ")				; 0DDB
    (1
     (delete @-)
     (pushback 1)
     (shift preedit))))
  (dependent
   (mark p))
  (backspace
   (undo))))

;; Local Variables:
;; coding: utf-8
;; mode: emacs-lisp
;; End: