leim/quail/hangul.el

   1 ;;; hangul.el --- Korean Hangul input method
   2
   3 ;; Copyright (C) 2008-2012  Free Software Foundation, Inc.
   4
   5 ;; Author: Jihyun Cho <jihyun.jo@gmail.com>
   6 ;; Keywords: multilingual, input method, Korean, Hangul
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;; This file is to implement the following hangul automata:
  26 ;; - Hangul 2-Bulsik input method
  27 ;; - Hangul 3-Bulsik final input method
  28 ;; - Hangul 3-Bulsik 390 input method
  29
  30 ;;; Code:
  31
  32 (require 'quail)
  33 (require 'hanja-util)
  34
  35 ;; Hangul double Jamo table.
  36 ;; The format is an alist of JAMO-TYPE vs. DOUBLE-JAMO-TABLE.
  37 ;;
  38 ;; JAMO-TYPE is a symbol `cho' for Choseong, `jung' for Jungseong, and
  39 ;; `jong' for Jongseong.
  40 ;;
  41 ;; DOUBLE-JAMO-TABLE is an alist of Jamo index vs. the vector of Jamo
  42 ;; indies that can be combined with the car part.
  43 ;;
  44 ;; Jamo index is a relative index in `hangul Compatibility Jamo' area
  45 ;; of the Unicode (i.e. 1 for U+3131).
  46
  47 (defconst hangul-djamo-table
  48   '((cho . ((1 . [1])                   ; Choseong
  49             (7 . [7])
  50             (18 . [18])
  51             (21 . [21])
  52             (24 . [24])))
  53     (jung . ((39 . [31 32 51])          ; Jungseong
  54              (44 . [35 36 51])
  55              (49 . [51])))
  56     (jong . ((1 . [1 21])               ; Jongseong
  57              (4 . [24 30])
  58              (9 . [1 17 18 21 28 29 30])
  59              (18 . [18 21])
  60              (21 . [21])))))
  61
  62 ;; Hangul 2-Bulsik keymap.
  63 ;; It converts an ASCII code A-Z, a-z, to the corresponding hangul
  64 ;; Jamo index.
  65
  66 (defconst hangul2-keymap
  67   [17 48 26 23 7 9 30 39 33 35 31 51 49 44 32 36 18 1 4 21 37 29 24 28 43 27])
  68
  69 ;; Hangul 3-Bulsik final keymap.  3-Bulsik use full keyboard layout.
  70 ;; Therefore, we must map all printable ASCII codes (`!' to `~')
  71 ;; to Hangul 3-Bulsik codes.
  72 ;; Other parts are the same as `hangul2-keymap'.
  73 (defconst hangul3-keymap
  74   [2 183 24 15 14 8220 120 39 126 8221 43 44 41 46 74 119 30 22 18 78 83
  75      68 73 85 79 52 110 44 62 46 33 10 7 63 27 12 5 11 69 48 55 49 50 51
  76      34 45 56 57 29 16 6 13 54 3 28 20 53 26 40 58 60 61 59 42 23 79 71
  77      86 72 66 84 96 109 115 93 116 122 113 118 121 21 67 4 70 99 74 9 1
  78      101 17 37 92 47 8251])
  79
  80 ;; Hangul 3-Bulsik 390 keymap.
  81 ;; The role is the same as `hangul3-keymap'.
  82 (defconst hangul390-keymap
  83   [24 34 35 36 37 38 120 40 41 42 43 44 45 46 73 119 30 22 18 77 82 67 72
  84       84 78 58 110 50 61 51 63 64 7 33 11 10 27 2 47 39 56 52 53 54 49 48
  85       57 62 29 68 6 59 55 16 28 20 60 26 91 92 93 94 95 96 23 78 70 85 71
  86       65 83 90 109 115 87 116 122 113 118 121 21 66 4 69 99 73 9 1 101 17
  87       123 124 125 126])
  88
  89 (defvar hangul-im-keymap
  90   (let ((map (make-sparse-keymap)))
  91     (define-key map "\d" 'hangul-delete-backward-char)
  92     (define-key map [f9] 'hangul-to-hanja-conversion)
  93     (define-key map [Hangul_Hanja] 'hangul-to-hanja-conversion)
  94     map)
  95   "Keymap for Hangul method.  It is used by all Hangul input methods.")
  96
  97 ;; Current input character buffer. Store separated hangul character.
  98 ;; The first and second are Choseong position.
  99 ;; The third and forth are Jungseong position.
 100 ;; The fifth and sixth are Jongseong position.
 101 ;; The second, forth and sixth are double Jamo position.
 102 (defvar hangul-queue
 103   (make-vector 6 0))
 104
 105 (defsubst notzerop (number)
 106   (not (zerop number)))
 107
 108 (defsubst alphabetp (char)
 109   (or (and (>= char ?A) (<= char ?Z))
 110       (and (>= char ?a) (<= char ?z))))
 111
 112 (defun hangul-character (cho jung jong)
 113   "Convert CHO, JUNG, JONG to the precomposed `Hangul Syllables' character.
 114 CHO, JUNG, JONG are relative indices in `Hangul Compatibility Jamo' of Unicode.
 115 Return a zero-length string if the conversion fails."
 116   (or
 117    (decode-char
 118     'ucs
 119     (if (and (/= cho 0) (/= jung 0))
 120         (+ #xac00
 121            (* 588
 122               (- cho
 123                  (cond ((< cho 3) 1)
 124                        ((< cho 5) 2)
 125                        ((< cho 10) 4)
 126                        ((< cho 20) 11)
 127                        (t 12))))
 128            (* 28 (- jung 31))
 129            (- jong
 130               (cond ((< jong 8) 0)
 131                     ((< jong 19) 1)
 132                     ((< jong 25) 2)
 133                     (t 3))))
 134       (+ #x3130
 135          (cond ((/= cho 0) cho)
 136                ((/= jung 0) jung)
 137                ((/= jong 0) jong)))))
 138    ""))
 139
 140 (defun hangul-insert-character (&rest queues)
 141   "Insert characters generated from QUEUES.
 142 Each queue has the same form as `hangul-queue'.
 143 Setup `quail-overlay' to the last character."
 144   (if (and mark-active transient-mark-mode)
 145       (progn
 146         (delete-region (region-beginning) (region-end))
 147         (deactivate-mark)))
 148   (quail-delete-region)
 149   (let ((first (car queues)))
 150     (insert
 151      (hangul-character
 152       (+ (aref first 0) (hangul-djamo 'cho (aref first 0) (aref first 1)))
 153       (+ (aref first 2) (hangul-djamo 'jung (aref first 2) (aref first 3)))
 154       (+ (aref first 4) (hangul-djamo 'jong (aref first 4) (aref first 5))))))
 155   (move-overlay quail-overlay (overlay-start quail-overlay) (point))
 156   (dolist (queue (cdr queues))
 157     (insert
 158      (hangul-character
 159       (+ (aref queue 0) (hangul-djamo 'cho (aref queue 0) (aref queue 1)))
 160       (+ (aref queue 2) (hangul-djamo 'jung (aref queue 2) (aref queue 3)))
 161       (+ (aref queue 4) (hangul-djamo 'jong (aref queue 4) (aref queue 5)))))
 162     (move-overlay quail-overlay (1+ (overlay-start quail-overlay)) (point))))
 163
 164 (defun hangul-djamo (jamo char1 char2)
 165   "Return the double Jamo index calculated from the arguments.
 166 JAMO is a type of Hangul Jamo; `cho', `jung', or `jong'.
 167 CHAR1 and CHAR2 are Hangul Jamo indices.
 168 Return nil if CHAR1 and CHAR2 can not be combined."
 169   (let* ((jamo (cdr (assoc jamo hangul-djamo-table)))
 170          (char1 (cdr (assoc char1 jamo))))
 171     (if char1
 172         (let ((i (length char1)))
 173           (or (catch 'found
 174                 (while (> i 0)
 175                   (if (= char2 (aref char1 (1- i)))
 176                       (throw 'found i))
 177                   (setf i (1- i))))
 178               0))
 179       0)))
 180
 181 (defsubst hangul2-input-method-jaum (char)
 182   "Store Hangul Jamo indice CHAR in `hangul-queue'.
 183 It is a Hangul 2-Bulsik Jaum.
 184 This function processes a Hangul 2-Bulsik Jaum.
 185 The Hangul 2-Bulsik is composed of a Jaum and a Moum.
 186 The Jaum can be located in a Choseong position and a Jongseong position.
 187 Unless the function inserts CHAR to `hangul-queue',
 188 commit current `hangul-queue' and then set a new `hangul-queue',
 189 and insert CHAR to new `hangul-queue'."
 190   (if (cond ((zerop (aref hangul-queue 0))
 191              (aset hangul-queue 0 char))
 192             ((and (zerop (aref hangul-queue 1))
 193                   (zerop (aref hangul-queue 2))
 194                   (notzerop (hangul-djamo 'cho (aref hangul-queue 0) char)))
 195              (aset hangul-queue 1 char))
 196             ((and (zerop (aref hangul-queue 4))
 197                   (notzerop (aref hangul-queue 2))
 198                   (/= char 8)
 199                   (/= char 19)
 200                   (/= char 25)
 201                   (numberp
 202                    (hangul-character
 203                     (+ (aref hangul-queue 0)
 204                        (hangul-djamo
 205                         'cho
 206                         (aref hangul-queue 0)
 207                         (aref hangul-queue 1)))
 208                     (+ (aref hangul-queue 2)
 209                        (hangul-djamo
 210                         'jung
 211                         (aref hangul-queue 2)
 212                         (aref hangul-queue 3)))
 213                     char)))
 214              (aset hangul-queue 4 char))
 215             ((and (zerop (aref hangul-queue 5))
 216                   (notzerop (hangul-djamo 'jong (aref hangul-queue 4) char))
 217                   (numberp
 218                    (hangul-character
 219                     (+ (aref hangul-queue 0)
 220                        (hangul-djamo
 221                         'cho
 222                         (aref hangul-queue 0)
 223                         (aref hangul-queue 1)))
 224                     (+ (aref hangul-queue 2)
 225                        (hangul-djamo
 226                         'jung
 227                         (aref hangul-queue 2)
 228                         (aref hangul-queue 3)))
 229                     (+ (aref hangul-queue 4)
 230                        (hangul-djamo
 231                         'jong
 232                         (aref hangul-queue 4)
 233                         char)))))
 234              (aset hangul-queue 5 char)))
 235       (hangul-insert-character hangul-queue)
 236     (hangul-insert-character hangul-queue
 237                              (setq hangul-queue (vector char 0 0 0 0 0)))))
 238
 239 (defsubst hangul2-input-method-moum (char)
 240   "Store Hangul Jamo indice CHAR in `hangul-queue'.
 241 It is a Hangul 2-Bulsik Moum.
 242 This function processes a Hangul 2-Bulsik Moum.
 243 The Moum can be located in a Jungseong position.
 244 Other parts are the same as a `hangul2-input-method-jaum'."
 245   (if (cond ((zerop (aref hangul-queue 2))
 246              (aset hangul-queue 2 char))
 247             ((and (zerop (aref hangul-queue 3))
 248                   (zerop (aref hangul-queue 4))
 249                   (notzerop (hangul-djamo 'jung (aref hangul-queue 2) char)))
 250              (aset hangul-queue 3 char)))
 251       (hangul-insert-character hangul-queue)
 252     (let ((next-char (vector 0 0 char 0 0 0)))
 253       (cond ((notzerop (aref hangul-queue 5))
 254              (aset next-char 0 (aref hangul-queue 5))
 255              (aset hangul-queue 5 0))
 256             ((notzerop (aref hangul-queue 4))
 257              (aset next-char 0 (aref hangul-queue 4))
 258              (aset hangul-queue 4 0)))
 259       (hangul-insert-character hangul-queue
 260                                (setq hangul-queue next-char)))))
 261
 262 (defsubst hangul3-input-method-cho (char)
 263   "Store Hangul Jamo indice CHAR in `hangul-queue'.
 264 It is a Hangul 3-Bulsik Choseong.
 265 This function processes a Hangul 3-Bulsik Choseong.
 266 The Hangul 3-Bulsik is composed of a Choseong, a Jungseong and a Jongseong.
 267 The Choseong can be located in a Choseong position.
 268 Other parts are the same as a `hangul2-input-method-jaum'."
 269   (if (cond ((and (zerop (aref hangul-queue 0))
 270                   (zerop (aref hangul-queue 4)))
 271              (aset hangul-queue 0 char))
 272             ((and (zerop (aref hangul-queue 1))
 273                   (zerop (aref hangul-queue 2))
 274                   (notzerop (hangul-djamo 'cho (aref hangul-queue 0) char)))
 275              (aset hangul-queue 1 char)))
 276       (hangul-insert-character hangul-queue)
 277     (hangul-insert-character hangul-queue
 278                              (setq hangul-queue (vector char 0 0 0 0 0)))))
 279
 280 (defsubst hangul3-input-method-jung (char)
 281   "Store Hangul Jamo indice CHAR in `hangul-queue'.
 282 It is a Hangul 3-Bulsik Jungseong.
 283 This function processes a Hangul 3-Bulsik Jungseong.
 284 The Jungseong can be located in a Jungseong position.
 285 Other parts are the same as a `hangul3-input-method-cho'."
 286   (if (cond ((and (zerop (aref hangul-queue 2))
 287                   (zerop (aref hangul-queue 4)))
 288              (aset hangul-queue 2 char))
 289             ((and (zerop (aref hangul-queue 3))
 290                   (notzerop (hangul-djamo 'jung (aref hangul-queue 2) char)))
 291              (aset hangul-queue 3 char)))
 292       (hangul-insert-character hangul-queue)
 293     (hangul-insert-character hangul-queue
 294                              (setq hangul-queue (vector 0 0 char 0 0 0)))))
 295
 296 (defsubst hangul3-input-method-jong (char)
 297   "Store Hangul Jamo indice CHAR in `hangul-queue'.
 298 It is a Hangul 3-Bulsik Jongseong.
 299 This function processes a Hangul 3-Bulsik Jongseong.
 300 The Jongseong can be located in a Jongseong position.
 301 Other parts are the same as a `hangul3-input-method-cho'."
 302   (if (cond ((and (zerop (aref hangul-queue 4))
 303                   (notzerop (aref hangul-queue 0))
 304                   (notzerop (aref hangul-queue 2))
 305                   (numberp
 306                    (hangul-character
 307                     (+ (aref hangul-queue 0)
 308                        (hangul-djamo
 309                         'cho
 310                         (aref hangul-queue 0)
 311                         (aref hangul-queue 1)))
 312                     (+ (aref hangul-queue 2)
 313                        (hangul-djamo
 314                         'jung
 315                         (aref hangul-queue 2)
 316                         (aref hangul-queue 3)))
 317                     char)))
 318              (aset hangul-queue 4 char))
 319             ((and (zerop (aref hangul-queue 5))
 320                   (notzerop (hangul-djamo 'jong (aref hangul-queue 4) char))
 321                   (numberp
 322                    (hangul-character
 323                     (+ (aref hangul-queue 0)
 324                        (hangul-djamo
 325                         'cho
 326                         (aref hangul-queue 0)
 327                         (aref hangul-queue 1)))
 328                     (+ (aref hangul-queue 2)
 329                        (hangul-djamo
 330                         'jung
 331                         (aref hangul-queue 2)
 332                         (aref hangul-queue 3)))
 333                     (+ (aref hangul-queue 4)
 334                        (hangul-djamo
 335                         'jong
 336                         (aref hangul-queue 4)
 337                         char)))))
 338              (aset hangul-queue 5 char)))
 339       (hangul-insert-character hangul-queue)
 340     (if (zerop (apply '+ (append hangul-queue nil)))
 341         (hangul-insert-character (setq hangul-queue (vector 0 0 0 0 char 0)))
 342       (hangul-insert-character hangul-queue
 343                                (setq hangul-queue (vector 0 0 0 0 char 0))))))
 344
 345 (defun hangul-delete-backward-char ()
 346   "Delete the previous hangul character by Jaso units."
 347   (interactive)
 348   (let ((i 5))
 349     (while (and (> i 0) (zerop (aref hangul-queue i)))
 350       (setq i (1- i)))
 351     (aset hangul-queue i 0))
 352   (if (notzerop (apply '+ (append hangul-queue nil)))
 353       (hangul-insert-character hangul-queue)
 354     (delete-backward-char 1)))
 355
 356 (defun hangul-to-hanja-conversion ()
 357   "Convert the previous hangul character to the corresponding hanja character.
 358 When a Korean input method is off, convert the following hangul character."
 359   (interactive)
 360   (let ((echo-keystrokes 0)
 361         delete-func
 362         hanja-character)
 363     (if (and (overlayp quail-overlay) (overlay-start quail-overlay))
 364         (progn
 365           (setq hanja-character (hangul-to-hanja-char (preceding-char)))
 366           (setq delete-func (lambda () (delete-backward-char 1))))
 367       (setq hanja-character (hangul-to-hanja-char (following-char)))
 368       (setq delete-func (lambda () (delete-char 1))))
 369     (when hanja-character
 370       (funcall delete-func)
 371       (insert hanja-character)
 372       (setq hangul-queue (make-vector 6 0))
 373       (if (and (overlayp quail-overlay) (overlay-start quail-overlay))
 374           (move-overlay quail-overlay (point) (point))))))
 375
 376 ;; Support function for `hangul2-input-method'.  Actually, this
 377 ;; function handles the Hangul 2-Bulsik.  KEY is an entered key code
 378 ;; used for looking up `hangul2-keymap'."
 379 (defun hangul2-input-method-internal (key)
 380   (let ((char (+ (aref hangul2-keymap (1- (% key 32)))
 381                  (cond ((or (= key ?O) (= key ?P)) 2)
 382                        ((or (= key ?E) (= key ?Q) (= key ?R)
 383                             (= key ?T) (= key ?W)) 1)
 384                        (t 0)))))
 385     (if (< char 31)
 386         (hangul2-input-method-jaum char)
 387       (hangul2-input-method-moum char))))
 388
 389 (defun hangul2-input-method (key)
 390   "2-Bulsik input method."
 391   (if (or buffer-read-only (not (alphabetp key)))
 392       (list key)
 393     (quail-setup-overlays nil)
 394     (let ((input-method-function nil)
 395           (echo-keystrokes 0)
 396           (help-char nil))
 397       (setq hangul-queue (make-vector 6 0))
 398       (hangul2-input-method-internal key)
 399       (unwind-protect
 400           (catch 'exit-input-loop
 401             (while t
 402               (let* ((seq (read-key-sequence nil))
 403                      (cmd (lookup-key hangul-im-keymap seq))
 404                      key)
 405                 (cond ((and (stringp seq)
 406                             (= 1 (length seq))
 407                             (setq key (aref seq 0))
 408                             (alphabetp key))
 409                        (hangul2-input-method-internal key))
 410                       ((commandp cmd)
 411                        (call-interactively cmd))
 412                       (t
 413                        (setq unread-command-events (listify-key-sequence seq))
 414                        (throw 'exit-input-loop nil))))))
 415         (quail-delete-overlays)))))
 416
 417 ;; Support function for `hangul3-input-method'.  Actually, this
 418 ;; function handles the Hangul 3-Bulsik final.  KEY is an entered key
 419 ;; code used for looking up `hangul3-keymap'."
 420 (defun hangul3-input-method-internal (key)
 421   (let ((char (aref hangul3-keymap (- key 33))))
 422     (cond ((and (> char 92) (< char 123))
 423            (hangul3-input-method-cho (- char 92)))
 424           ((and (> char 65) (< char 87))
 425            (hangul3-input-method-jung (- char 35)))
 426           ((< char 31)
 427            (hangul3-input-method-jong char))
 428           (t
 429            (setq hangul-queue (make-vector 6 0))
 430            (insert (decode-char 'ucs char))
 431            (move-overlay quail-overlay (point) (point))))))
 432
 433 (defun hangul3-input-method (key)
 434   "3-Bulsik final input method."
 435   (if (or buffer-read-only (< key 33) (>= key 127))
 436       (list key)
 437     (quail-setup-overlays nil)
 438     (let ((input-method-function nil)
 439           (echo-keystrokes 0)
 440           (help-char nil))
 441       (setq hangul-queue (make-vector 6 0))
 442       (hangul3-input-method-internal key)
 443       (unwind-protect
 444           (catch 'exit-input-loop
 445             (while t
 446               (let* ((seq (read-key-sequence nil))
 447                      (cmd (lookup-key hangul-im-keymap seq))
 448                      key)
 449                 (cond ((and (stringp seq)
 450                             (= 1 (length seq))
 451                             (setq key (aref seq 0))
 452                             (and (>= key 33) (< key 127)))
 453                        (hangul3-input-method-internal key))
 454                       ((commandp cmd)
 455                        (call-interactively cmd))
 456                       (t
 457                        (setq unread-command-events (listify-key-sequence seq))
 458                        (throw 'exit-input-loop nil))))))
 459         (quail-delete-overlays)))))
 460
 461 ;; Support function for `hangul390-input-method'.  Actually, this
 462 ;; function handles the Hangul 3-Bulsik 390.  KEY is an entered key
 463 ;; code used for looking up `hangul390-keymap'."
 464 (defun hangul390-input-method-internal (key)
 465   (let ((char (aref hangul390-keymap (- key 33))))
 466     (cond ((or (and (> char 86) (< char 91))
 467                (and (> char 96) (< char 123)))
 468            (hangul3-input-method-cho (- char (if (< char 97) 86 92))))
 469           ((and (> char 64) (< char 86))
 470            (hangul3-input-method-jung (- char 34)))
 471           ((< char 31)
 472            (hangul3-input-method-jong char))
 473           (t
 474            (setq hangul-queue (make-vector 6 0))
 475            (insert (decode-char 'ucs char))
 476            (move-overlay quail-overlay (point) (point))))))
 477
 478 (defun hangul390-input-method (key)
 479   "3-Bulsik 390 input method."
 480   (if (or buffer-read-only (< key 33) (>= key 127))
 481       (list key)
 482     (quail-setup-overlays nil)
 483     (let ((input-method-function nil)
 484           (echo-keystrokes 0)
 485           (help-char nil))
 486       (setq hangul-queue (make-vector 6 0))
 487       (hangul390-input-method-internal key)
 488       (unwind-protect
 489           (catch 'exit-input-loop
 490             (while t
 491               (let* ((seq (read-key-sequence nil))
 492                      (cmd (lookup-key hangul-im-keymap seq))
 493                      key)
 494                 (cond ((and (stringp seq)
 495                             (= 1 (length seq))
 496                             (setq key (aref seq 0))
 497                             (and (>= key 33) (< key 127)))
 498                        (hangul390-input-method-internal key))
 499                       ((commandp cmd)
 500                        (call-interactively cmd))
 501                       (t
 502                        (setq unread-command-events (listify-key-sequence seq))
 503                        (throw 'exit-input-loop nil))))))
 504         (quail-delete-overlays)))))
 505
 506 ;; Text shown by describe-input-method.  Set to a proper text by
 507 ;; hangul-input-method-activate.
 508 (defvar hangul-input-method-help-text nil)
 509 (make-variable-buffer-local 'hangul-input-method-help-text)
 510
 511 (defun hangul-input-method-activate (input-method func help-text &rest args)
 512   "Activate Hangul input method INPUT-METHOD.
 513 FUNC is a function to handle input key.
 514 HELP-TEXT is a text set in `hangul-input-method-help-text'."
 515   (setq deactivate-current-input-method-function 'hangul-input-method-deactivate
 516         describe-current-input-method-function 'hangul-input-method-help
 517         hangul-input-method-help-text help-text)
 518   (quail-delete-overlays)
 519   (if (eq (selected-window) (minibuffer-window))
 520       (add-hook 'minibuffer-exit-hook 'quail-exit-from-minibuffer))
 521   (set (make-local-variable 'input-method-function) func))
 522
 523 (defun hangul-input-method-deactivate ()
 524   "Deactivate the current Hangul input method."
 525   (interactive)
 526   (unwind-protect
 527       (progn
 528         (quail-hide-guidance)
 529         (quail-delete-overlays)
 530         (setq describe-current-input-method-function nil))
 531     (kill-local-variable 'input-method-function)))
 532
 533 (define-obsolete-function-alias
 534   'hangul-input-method-inactivate
 535   'hangul-input-method-deactivate "24.2")
 536
 537 (defun hangul-input-method-help ()
 538   "Describe the current Hangul input method."
 539   (interactive)
 540   (with-output-to-temp-buffer "*Help*"
 541     (princ hangul-input-method-help-text)))
 542
 543 (provide 'hangul)
 544
 545 ;;; hangul.el ends here