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;; unicode.mim -- Input method for Unicode characters by typing character code
;; Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009
;;   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 t unicode)

(description (_"Input method for Unicode BMP characters using hexadigits.
Type C-u followed by four hexadecimal numbers [0-9A-Fa-f]
of a Unicode character code.
"))

(title "UNICODE")

(variable
 (prompt (_"Preedit prompt
Prompt string shown in the preedit area while typing hexadecimal numbers.")
	 "U+"))
(command
 (start (_"Start Unicode
Start typing hexadecimal numbers of Unicode character.")
	(C-U)))

(map
 (starter
  (start prompt))

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

 (backspace
  ((BackSpace))))

(state
 (init
  (starter (set code 0) (set count 0) (shift uni-hex)))

 (uni-hex
  (hex (set this @-1)
       (cond ((< @-1 ?A) (sub this 48))
	     (1 (sub this 55)))
       (set code (+ (* code 16) this))
       (set count (+ count 1))
       (cond ((= count 4)
	      (delete @<) (insert code) (shift init))))
  (backspace (undo))))

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