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544 lines
21 KiB
EmacsLisp
544 lines
21 KiB
EmacsLisp
;;; hangul.el --- Korean Hangul input method
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;; Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
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;; Author: Jihyun Cho <jihyun.jo@gmail.com>
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;; Keywords: multilingual, input method, Korean, Hangul
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file is to implement the following hangul automata:
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;; - Hangul 2-Bulsik input method
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;; - Hangul 3-Bulsik final input method
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;; - Hangul 3-Bulsik 390 input method
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;;; Code:
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(require 'quail)
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(eval-when-compile (require 'cl)) ; for setf
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(require 'hanja-util)
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;; Hangul double Jamo table.
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;; The format is an alist of JAMO-TYPE vs. DOUBLE-JAMO-TABLE.
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;;
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;; JAMO-TYPE is a symbol `cho' for Choseong, `jung' for Jungseong, and
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;; `jong' for Jongseong.
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;;
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;; DOUBLE-JAMO-TABLE is an alist of Jamo index vs. the vector of Jamo
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;; indies that can be combined with the car part.
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;;
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;; Jamo index is a relative index in `hangul Compatibility Jamo' area
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;; of the Unicode (i.e. 1 for U+3131).
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(defconst hangul-djamo-table
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'((cho . ((1 . [1]) ; Choseong
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(7 . [7])
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(18 . [18])
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(21 . [21])
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(24 . [24])))
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(jung . ((39 . [31 32 51]) ; Jungseong
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(44 . [35 36 51])
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(49 . [51])))
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(jong . ((1 . [1 21]) ; Jongseong
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(4 . [24 30])
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(9 . [1 17 18 21 28 29 30])
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(18 . [18 21])
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(21 . [21])))))
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;; Hangul 2-Bulsik keymap.
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;; It converts an ASCII code A-Z, a-z, to the corresponding hangul
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;; Jamo index.
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(defconst hangul2-keymap
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[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])
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;; Hangul 3-Bulsik final keymap. 3-Bulsik use full keyboard layout.
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;; Therefore, we must map all printable ASCII codes (`!' to `~')
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;; to Hangul 3-Bulsik codes.
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;; Other parts are the same as `hangul2-keymap'.
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(defconst hangul3-keymap
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[2 183 24 15 14 8220 120 39 126 8221 43 44 41 46 74 119 30 22 18 78 83
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68 73 85 79 52 110 44 62 46 33 10 7 63 27 12 5 11 69 48 55 49 50 51
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34 45 56 57 29 16 6 13 54 3 28 20 53 26 40 58 60 61 59 42 23 79 71
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86 72 66 84 96 109 115 93 116 122 113 118 121 21 67 4 70 99 74 9 1
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101 17 37 92 47 8251])
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;; Hangul 3-Bulsik 390 keymap.
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;; The role is the same as `hangul3-keymap'.
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(defconst hangul390-keymap
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[24 34 35 36 37 38 120 40 41 42 43 44 45 46 73 119 30 22 18 77 82 67 72
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84 78 58 110 50 61 51 63 64 7 33 11 10 27 2 47 39 56 52 53 54 49 48
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57 62 29 68 6 59 55 16 28 20 60 26 91 92 93 94 95 96 23 78 70 85 71
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65 83 90 109 115 87 116 122 113 118 121 21 66 4 69 99 73 9 1 101 17
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123 124 125 126])
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(defvar hangul-im-keymap
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(let ((map (make-sparse-keymap)))
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(define-key map "\d" 'hangul-delete-backward-char)
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(define-key map [f9] 'hangul-to-hanja-conversion)
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(define-key map [Hangul_Hanja] 'hangul-to-hanja-conversion)
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map)
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"Keymap for Hangul method. It is used by all Hangul input methods.")
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;; Current input character buffer. Store separated hangul character.
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;; The first and second are Choseong position.
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;; The third and forth are Jungseong position.
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;; The fifth and sixth are Jongseong position.
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;; The second, forth and sixth are double Jamo position.
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(defvar hangul-queue
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(make-vector 6 0))
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(defsubst notzerop (number)
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(not (zerop number)))
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(defsubst alphabetp (char)
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(or (and (>= char ?A) (<= char ?Z))
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(and (>= char ?a) (<= char ?z))))
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(defun hangul-character (cho jung jong)
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"Convert CHO, JUNG, JONG to the precomposed `Hangul Syllables' character.
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CHO, JUNG, JONG are relative indices in `Hangul Compatibility Jamo' of unicode.
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Return a zero-length string if the conversion fails."
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(or
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(decode-char
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'ucs
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(if (and (/= cho 0) (/= jung 0))
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(+ #xac00
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(* 588
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(- cho
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(cond ((< cho 3) 1)
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((< cho 5) 2)
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((< cho 10) 4)
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((< cho 20) 11)
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(t 12))))
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(* 28 (- jung 31))
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(- jong
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(cond ((< jong 8) 0)
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((< jong 19) 1)
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((< jong 25) 2)
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(t 3))))
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(+ #x3130
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(cond ((/= cho 0) cho)
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((/= jung 0) jung)
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((/= jong 0) jong)))))
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""))
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(defun hangul-insert-character (&rest queues)
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"Insert characters generated from QUEUES.
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Each queue has the same form as `hangul-queue'.
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Setup `quail-overlay' to the last character."
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(if (and mark-active transient-mark-mode)
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(progn
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(delete-region (region-beginning) (region-end))
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(deactivate-mark)))
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(quail-delete-region)
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(let ((first (car queues)))
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(insert
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(hangul-character
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(+ (aref first 0) (hangul-djamo 'cho (aref first 0) (aref first 1)))
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(+ (aref first 2) (hangul-djamo 'jung (aref first 2) (aref first 3)))
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(+ (aref first 4) (hangul-djamo 'jong (aref first 4) (aref first 5))))))
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(move-overlay quail-overlay (overlay-start quail-overlay) (point))
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(dolist (queue (cdr queues))
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(insert
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(hangul-character
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(+ (aref queue 0) (hangul-djamo 'cho (aref queue 0) (aref queue 1)))
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(+ (aref queue 2) (hangul-djamo 'jung (aref queue 2) (aref queue 3)))
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(+ (aref queue 4) (hangul-djamo 'jong (aref queue 4) (aref queue 5)))))
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(move-overlay quail-overlay (1+ (overlay-start quail-overlay)) (point))))
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(defun hangul-djamo (jamo char1 char2)
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"Return the double Jamo index calculated from the arguments.
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JAMO is a type of Hangul Jamo; `cho', `jung', or `jong'.
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CHAR1 and CHAR2 are Hangul Jamo indices.
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Return nil if CHAR1 and CHAR2 can not be combined."
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(let* ((jamo (cdr (assoc jamo hangul-djamo-table)))
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(char1 (cdr (assoc char1 jamo))))
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(if char1
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(let ((i (length char1)))
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(or (catch 'found
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(while (> i 0)
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(if (= char2 (aref char1 (1- i)))
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(throw 'found i))
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(setf i (1- i))))
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0))
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0)))
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(defsubst hangul2-input-method-jaum (char)
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"Store Hangul Jamo indice CHAR in `hangul-queue'.
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It is a Hangul 2-Bulsik Jaum.
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This function processes a Hangul 2-Bulsik Jaum.
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The Hangul 2-Bulsik is composed of a Jaum and a Moum.
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The Jaum can be located in a Choseong position and a Jongseong position.
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Unless the function inserts CHAR to `hangul-queue',
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commit current `hangul-queue' and then set a new `hangul-queue',
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and insert CHAR to new `hangul-queue'."
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(if (cond ((zerop (aref hangul-queue 0))
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(aset hangul-queue 0 char))
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((and (zerop (aref hangul-queue 1))
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(zerop (aref hangul-queue 2))
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(notzerop (hangul-djamo 'cho (aref hangul-queue 0) char)))
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(aset hangul-queue 1 char))
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((and (zerop (aref hangul-queue 4))
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(notzerop (aref hangul-queue 2))
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(/= char 8)
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(/= char 19)
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(/= char 25)
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(numberp
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(hangul-character
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(+ (aref hangul-queue 0)
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(hangul-djamo
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'cho
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(aref hangul-queue 0)
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(aref hangul-queue 1)))
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(+ (aref hangul-queue 2)
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(hangul-djamo
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'jung
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(aref hangul-queue 2)
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(aref hangul-queue 3)))
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char)))
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(aset hangul-queue 4 char))
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((and (zerop (aref hangul-queue 5))
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(notzerop (hangul-djamo 'jong (aref hangul-queue 4) char))
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(numberp
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(hangul-character
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(+ (aref hangul-queue 0)
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(hangul-djamo
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'cho
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(aref hangul-queue 0)
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(aref hangul-queue 1)))
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(+ (aref hangul-queue 2)
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(hangul-djamo
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'jung
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(aref hangul-queue 2)
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(aref hangul-queue 3)))
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(+ (aref hangul-queue 4)
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(hangul-djamo
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'jong
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(aref hangul-queue 4)
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char)))))
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(aset hangul-queue 5 char)))
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(hangul-insert-character hangul-queue)
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(hangul-insert-character hangul-queue
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(setq hangul-queue (vector char 0 0 0 0 0)))))
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(defsubst hangul2-input-method-moum (char)
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"Store Hangul Jamo indice CHAR in `hangul-queue'.
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It is a Hangul 2-Bulsik Moum.
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This function processes a Hangul 2-Bulsik Moum.
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The Moum can be located in a Jungseong position.
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Other parts are the same as a `hangul2-input-method-jaum'."
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(if (cond ((zerop (aref hangul-queue 2))
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(aset hangul-queue 2 char))
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((and (zerop (aref hangul-queue 3))
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(zerop (aref hangul-queue 4))
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(notzerop (hangul-djamo 'jung (aref hangul-queue 2) char)))
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(aset hangul-queue 3 char)))
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(hangul-insert-character hangul-queue)
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(let ((next-char (vector 0 0 char 0 0 0)))
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(cond ((notzerop (aref hangul-queue 5))
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(aset next-char 0 (aref hangul-queue 5))
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(aset hangul-queue 5 0))
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((notzerop (aref hangul-queue 4))
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(aset next-char 0 (aref hangul-queue 4))
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(aset hangul-queue 4 0)))
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(hangul-insert-character hangul-queue
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(setq hangul-queue next-char)))))
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(defsubst hangul3-input-method-cho (char)
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"Store Hangul Jamo indice CHAR in `hangul-queue'.
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It is a Hangul 3-Bulsik Choseong.
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This function processes a Hangul 3-Bulsik Choseong.
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The Hangul 3-Bulsik is composed of a Choseong, a Jungseong and a Jongseong.
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The Choseong can be located in a Choseong position.
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Other parts are the same as a `hangul2-input-method-jaum'."
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(if (cond ((and (zerop (aref hangul-queue 0))
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(zerop (aref hangul-queue 4)))
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(aset hangul-queue 0 char))
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((and (zerop (aref hangul-queue 1))
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(zerop (aref hangul-queue 2))
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(notzerop (hangul-djamo 'cho (aref hangul-queue 0) char)))
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(aset hangul-queue 1 char)))
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(hangul-insert-character hangul-queue)
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(hangul-insert-character hangul-queue
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(setq hangul-queue (vector char 0 0 0 0 0)))))
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(defsubst hangul3-input-method-jung (char)
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"Store Hangul Jamo indice CHAR in `hangul-queue'.
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It is a Hangul 3-Bulsik Jungseong.
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This function processes a Hangul 3-Bulsik Jungseong.
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The Jungseong can be located in a Jungseong position.
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Other parts are the same as a `hangul3-input-method-cho'."
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(if (cond ((and (zerop (aref hangul-queue 2))
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(zerop (aref hangul-queue 4)))
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(aset hangul-queue 2 char))
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((and (zerop (aref hangul-queue 3))
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(notzerop (hangul-djamo 'jung (aref hangul-queue 2) char)))
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(aset hangul-queue 3 char)))
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(hangul-insert-character hangul-queue)
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(hangul-insert-character hangul-queue
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(setq hangul-queue (vector 0 0 char 0 0 0)))))
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(defsubst hangul3-input-method-jong (char)
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"Store Hangul Jamo indice CHAR in `hangul-queue'.
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It is a Hangul 3-Bulsik Jongseong.
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This function processes a Hangul 3-Bulsik Jongseong.
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The Jongseong can be located in a Jongseong position.
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Other parts are the same as a `hangul3-input-method-cho'."
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(if (cond ((and (zerop (aref hangul-queue 4))
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(notzerop (aref hangul-queue 0))
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(notzerop (aref hangul-queue 2))
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(numberp
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(hangul-character
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(+ (aref hangul-queue 0)
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(hangul-djamo
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'cho
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(aref hangul-queue 0)
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(aref hangul-queue 1)))
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(+ (aref hangul-queue 2)
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(hangul-djamo
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'jung
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(aref hangul-queue 2)
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(aref hangul-queue 3)))
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char)))
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(aset hangul-queue 4 char))
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((and (zerop (aref hangul-queue 5))
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(notzerop (hangul-djamo 'jong (aref hangul-queue 4) char))
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(numberp
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(hangul-character
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(+ (aref hangul-queue 0)
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(hangul-djamo
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'cho
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(aref hangul-queue 0)
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(aref hangul-queue 1)))
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(+ (aref hangul-queue 2)
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(hangul-djamo
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'jung
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(aref hangul-queue 2)
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(aref hangul-queue 3)))
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(+ (aref hangul-queue 4)
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(hangul-djamo
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'jong
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(aref hangul-queue 4)
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char)))))
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(aset hangul-queue 5 char)))
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(hangul-insert-character hangul-queue)
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(if (zerop (apply '+ (append hangul-queue nil)))
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(hangul-insert-character (setq hangul-queue (vector 0 0 0 0 char 0)))
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(hangul-insert-character hangul-queue
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(setq hangul-queue (vector 0 0 0 0 char 0))))))
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(defun hangul-delete-backward-char ()
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"Delete the previous hangul character by Jaso units."
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(interactive)
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(let ((i 5))
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(while (and (> i 0) (zerop (aref hangul-queue i)))
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(setq i (1- i)))
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(aset hangul-queue i 0))
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(if (notzerop (apply '+ (append hangul-queue nil)))
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(hangul-insert-character hangul-queue)
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(delete-backward-char 1)))
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(defun hangul-to-hanja-conversion ()
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"Convert the previous hangul character to the corresponding hanja character.
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When a Korean input method is off, convert the following hangul character."
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(interactive)
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(let ((echo-keystrokes 0)
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delete-func
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hanja-character)
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(if (and (overlayp quail-overlay) (overlay-start quail-overlay))
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(progn
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(setq hanja-character (hangul-to-hanja-char (preceding-char)))
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(setq delete-func (lambda () (delete-backward-char 1))))
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(setq hanja-character (hangul-to-hanja-char (following-char)))
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(setq delete-func (lambda () (delete-char 1))))
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(when hanja-character
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(funcall delete-func)
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(insert hanja-character)
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(setq hangul-queue (make-vector 6 0))
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(if (and (overlayp quail-overlay) (overlay-start quail-overlay))
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(move-overlay quail-overlay (point) (point))))))
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;; Support function for `hangul2-input-method'. Actually, this
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;; function handles the Hangul 2-Bulsik. KEY is an entered key code
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;; used for looking up `hangul2-keymap'."
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(defun hangul2-input-method-internal (key)
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(let ((char (+ (aref hangul2-keymap (1- (% key 32)))
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(cond ((or (= key ?O) (= key ?P)) 2)
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((or (= key ?E) (= key ?Q) (= key ?R)
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(= key ?T) (= key ?W)) 1)
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(t 0)))))
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(if (< char 31)
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(hangul2-input-method-jaum char)
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(hangul2-input-method-moum char))))
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(defun hangul2-input-method (key)
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"2-Bulsik input method."
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(if (or buffer-read-only (not (alphabetp key)))
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(list key)
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(quail-setup-overlays nil)
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(let ((input-method-function nil)
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(echo-keystrokes 0)
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(help-char nil))
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(setq hangul-queue (make-vector 6 0))
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(hangul2-input-method-internal key)
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(unwind-protect
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(catch 'exit-input-loop
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(while t
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(let* ((seq (read-key-sequence nil))
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(cmd (lookup-key hangul-im-keymap seq))
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key)
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(cond ((and (stringp seq)
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(= 1 (length seq))
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(setq key (aref seq 0))
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(alphabetp key))
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(hangul2-input-method-internal key))
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((commandp cmd)
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(call-interactively cmd))
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(t
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(setq unread-command-events (listify-key-sequence seq))
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(throw 'exit-input-loop nil))))))
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(quail-delete-overlays)))))
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;; Support function for `hangul3-input-method'. Actually, this
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;; function handles the Hangul 3-Bulsik final. KEY is an entered key
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;; code used for looking up `hangul3-keymap'."
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(defun hangul3-input-method-internal (key)
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(let ((char (aref hangul3-keymap (- key 33))))
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(cond ((and (> char 92) (< char 123))
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(hangul3-input-method-cho (- char 92)))
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((and (> char 65) (< char 87))
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(hangul3-input-method-jung (- char 35)))
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((< char 31)
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(hangul3-input-method-jong char))
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(t
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(setq hangul-queue (make-vector 6 0))
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(insert (decode-char 'ucs char))
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(move-overlay quail-overlay (point) (point))))))
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(defun hangul3-input-method (key)
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"3-Bulsik final input method."
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(if (or buffer-read-only (< key 33) (>= key 127))
|
|
(list key)
|
|
(quail-setup-overlays nil)
|
|
(let ((input-method-function nil)
|
|
(echo-keystrokes 0)
|
|
(help-char nil))
|
|
(setq hangul-queue (make-vector 6 0))
|
|
(hangul3-input-method-internal key)
|
|
(unwind-protect
|
|
(catch 'exit-input-loop
|
|
(while t
|
|
(let* ((seq (read-key-sequence nil))
|
|
(cmd (lookup-key hangul-im-keymap seq))
|
|
key)
|
|
(cond ((and (stringp seq)
|
|
(= 1 (length seq))
|
|
(setq key (aref seq 0))
|
|
(and (>= key 33) (< key 127)))
|
|
(hangul3-input-method-internal key))
|
|
((commandp cmd)
|
|
(call-interactively cmd))
|
|
(t
|
|
(setq unread-command-events (listify-key-sequence seq))
|
|
(throw 'exit-input-loop nil))))))
|
|
(quail-delete-overlays)))))
|
|
|
|
;; Support function for `hangul390-input-method'. Actually, this
|
|
;; function handles the Hangul 3-Bulsik 390. KEY is an entered key
|
|
;; code used for looking up `hangul390-keymap'."
|
|
(defun hangul390-input-method-internal (key)
|
|
(let ((char (aref hangul390-keymap (- key 33))))
|
|
(cond ((or (and (> char 86) (< char 91))
|
|
(and (> char 96) (< char 123)))
|
|
(hangul3-input-method-cho (- char (if (< char 97) 86 92))))
|
|
((and (> char 64) (< char 86))
|
|
(hangul3-input-method-jung (- char 34)))
|
|
((< char 31)
|
|
(hangul3-input-method-jong char))
|
|
(t
|
|
(setq hangul-queue (make-vector 6 0))
|
|
(insert (decode-char 'ucs char))
|
|
(move-overlay quail-overlay (point) (point))))))
|
|
|
|
(defun hangul390-input-method (key)
|
|
"3-Bulsik 390 input method."
|
|
(if (or buffer-read-only (< key 33) (>= key 127))
|
|
(list key)
|
|
(quail-setup-overlays nil)
|
|
(let ((input-method-function nil)
|
|
(echo-keystrokes 0)
|
|
(help-char nil))
|
|
(setq hangul-queue (make-vector 6 0))
|
|
(hangul390-input-method-internal key)
|
|
(unwind-protect
|
|
(catch 'exit-input-loop
|
|
(while t
|
|
(let* ((seq (read-key-sequence nil))
|
|
(cmd (lookup-key hangul-im-keymap seq))
|
|
key)
|
|
(cond ((and (stringp seq)
|
|
(= 1 (length seq))
|
|
(setq key (aref seq 0))
|
|
(and (>= key 33) (< key 127)))
|
|
(hangul390-input-method-internal key))
|
|
((commandp cmd)
|
|
(call-interactively cmd))
|
|
(t
|
|
(setq unread-command-events (listify-key-sequence seq))
|
|
(throw 'exit-input-loop nil))))))
|
|
(quail-delete-overlays)))))
|
|
|
|
;; Text shown by describe-input-method. Set to a proper text by
|
|
;; hangul-input-method-activate.
|
|
(defvar hangul-input-method-help-text nil)
|
|
(make-variable-buffer-local 'hangul-input-method-help-text)
|
|
|
|
(defun hangul-input-method-activate (input-method func help-text &rest args)
|
|
"Activate Hangul input method INPUT-METHOD.
|
|
FUNC is a function to handle input key.
|
|
HELP-TEXT is a text set in `hangul-input-method-help-text'."
|
|
(setq inactivate-current-input-method-function 'hangul-input-method-inactivate
|
|
describe-current-input-method-function 'hangul-input-method-help
|
|
hangul-input-method-help-text help-text)
|
|
(quail-delete-overlays)
|
|
(if (eq (selected-window) (minibuffer-window))
|
|
(add-hook 'minibuffer-exit-hook 'quail-exit-from-minibuffer))
|
|
(set (make-local-variable 'input-method-function) func))
|
|
|
|
(defun hangul-input-method-inactivate ()
|
|
"Inactivate the current Hangul input method."
|
|
(interactive)
|
|
(unwind-protect
|
|
(progn
|
|
(quail-hide-guidance)
|
|
(quail-delete-overlays)
|
|
(setq describe-current-input-method-function nil))
|
|
(kill-local-variable 'input-method-function)))
|
|
|
|
(defun hangul-input-method-help ()
|
|
"Describe the current Hangul input method."
|
|
(interactive)
|
|
(with-output-to-temp-buffer "*Help*"
|
|
(princ hangul-input-method-help-text)))
|
|
|
|
(provide 'hangul)
|
|
|
|
;; arch-tag: 26bc93fc-64ee-4fb1-b26d-22220d132dbe
|
|
;;; hangul.el ends here
|