1;;; kkc.el --- Kana Kanji converter    -*- coding: iso-2022-7bit; -*-
2
3;; Copyright (C) 1997, 1998, 2001, 2002, 2003, 2004, 2005,
4;;   2006, 2007  Free Software Foundation, Inc.
5;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
6;;   2005, 2006, 2007
7;;   National Institute of Advanced Industrial Science and Technology (AIST)
8;;   Registration Number H14PRO021
9
10;; Keywords: mule, multilingual, Japanese
11
12;; This file is part of GNU Emacs.
13
14;; GNU Emacs is free software; you can redistribute it and/or modify
15;; it under the terms of the GNU General Public License as published by
16;; the Free Software Foundation; either version 2, or (at your option)
17;; any later version.
18
19;; GNU Emacs is distributed in the hope that it will be useful,
20;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22;; GNU General Public License for more details.
23
24;; You should have received a copy of the GNU General Public License
25;; along with GNU Emacs; see the file COPYING.  If not, write to the
26;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
27;; Boston, MA 02110-1301, USA.
28
29;;; Commentary:
30
31;; These routines provide a simple and easy-to-use converter from
32;; Kana-string to Kana-Kanji-mixed-string.  This converter (here after
33;; KKC) uses a SKK dictionary to get information how to convert
34;; Kana-string.  Since KKC can't be fully automated, we need an
35;; interaction with a user to decide the correct conversion.   For
36;; that, we provide KKC major mode.
37
38;;; Code:
39
40(require 'ja-dic-utl)
41
42(defvar kkc-input-method-title "$B4A(B"
43  "String denoting KKC input method.
44This string is shown at mode line when users are in KKC mode.")
45
46(defvar kkc-init-file-name "~/.kkcrc"
47  "Name of a file which contains user's initial setup code for KKC.")
48
49;; A flag to control a file specified by `kkc-init-file-name'.
50;; The value nil means the file is not yet consulted.
51;; The value t means the file has already been consulted but there's
52;; no need of updating it yet.
53;; Any other value means that we must update the file before exiting Emacs.
54(defvar kkc-init-file-flag nil)
55
56;; Cash data for `kkc-lookup-key'.  This may be initialized by loading
57;; a file specified by `kkc-init-file-name'.  If any elements are
58;; modified, the data is written out to the file when exiting Emacs.
59(defvar kkc-lookup-cache nil)
60
61;; Tag symbol of `kkc-lookup-cache'.
62(defconst kkc-lookup-cache-tag 'kkc-lookup-cache-2)
63
64(defun kkc-save-init-file ()
65  "Save initial setup code for KKC to a file specified by `kkc-init-file-name'"
66  (if (and kkc-init-file-flag
67	   (not (eq kkc-init-file-flag t)))
68      (let ((coding-system-for-write 'iso-2022-7bit)
69	    (print-length nil))
70	(write-region (format "(setq kkc-lookup-cache '%S)\n" kkc-lookup-cache)
71		      nil
72		      kkc-init-file-name))))
73
74;; Sequence of characters to be used for indexes for shown list.  The
75;; Nth character is for the Nth conversion in the list currently shown.
76(defvar kkc-show-conversion-list-index-chars
77  "1234567890")
78
79(defun kkc-help ()
80  "Show key bindings available while converting by KKC."
81  (interactive)
82  (with-output-to-temp-buffer "*Help*"
83    (princ (substitute-command-keys "\\{kkc-keymap}"))))
84
85(defvar kkc-keymap
86  (let ((map (make-sparse-keymap))
87	(len (length kkc-show-conversion-list-index-chars))
88	(i 0))
89    (while (< i len)
90      (define-key map
91	(char-to-string (aref kkc-show-conversion-list-index-chars i))
92	'kkc-select-from-list)
93      (setq i (1+ i)))
94    (define-key map " " 'kkc-next)
95    (define-key map "\r" 'kkc-terminate)
96    (define-key map "\C-@" 'kkc-first-char-only)
97    (define-key map "\C-n" 'kkc-next)
98    (define-key map "\C-p" 'kkc-prev)
99    (define-key map "\C-i" 'kkc-shorter)
100    (define-key map "\C-o" 'kkc-longer)
101    (define-key map "I" 'kkc-shorter-conversion)
102    (define-key map "O" 'kkc-longer-phrase)
103    (define-key map "\C-c" 'kkc-cancel)
104    (define-key map "\C-?" 'kkc-cancel)
105    (define-key map "\C-f" 'kkc-next-phrase)
106    (define-key map "K" 'kkc-katakana)
107    (define-key map "H" 'kkc-hiragana)
108    (define-key map "l" 'kkc-show-conversion-list-or-next-group)
109    (define-key map "L" 'kkc-show-conversion-list-or-prev-group)
110    (define-key map [?\C- ] 'kkc-first-char-only)
111    (define-key map [delete] 'kkc-cancel)
112    (define-key map [return] 'kkc-terminate)
113    (define-key map "\C-h" 'kkc-help)
114    map)
115  "Keymap for KKC (Kana Kanji Converter).")
116
117;;; Internal variables used in KKC.
118
119;; The current Kana string to be converted.
120(defvar kkc-original-kana nil)
121
122;; The current key sequence (vector of Kana characters) generated from
123;; `kkc-original-kana'.
124(defvar kkc-current-key nil)
125
126;; List of the current conversions for `kkc-current-key'.
127(defvar kkc-current-conversions nil)
128
129;; Vector of the same length as `kkc-current-conversion'.  The first
130;; element is a vector of:
131;;	o index number of the first conversion shown previously,
132;;	o index number of a conversion next of the last one shown previously,
133;;	o the shown string itself.
134;; The remaining elements are widths (including columns for index
135;; numbers) of conversions stored in the same order as in
136;; `kkc-current-conversion'.
137(defvar kkc-current-conversions-width nil)
138
139(defcustom kkc-show-conversion-list-count 4
140  "*Count of successive `kkc-next' or `kkc-prev' to show conversion list.
141When you type SPC or C-p successively this count while using the input
142method `japanese', the conversion candidates are shown in the echo
143area while indicating the current selection by `<N>'."
144  :group 'mule
145  :type 'integer)
146
147;; Count of successive invocations of `kkc-next'.
148(defvar kkc-next-count nil)
149
150;; Count of successive invocations of `kkc-prev'.
151(defvar kkc-prev-count nil)
152
153;; Provided that `kkc-current-key' is [A B C D E F G H I], the current
154;; conversion target is [A B C D E F], and the sequence of which
155;; conversion is found is [A B C D]:
156;;
157;;                                A B C D E F G H I
158;; kkc-overlay-head (black):     |<--------->|
159;; kkc-overlay-tail (underline):         |<------->|
160;; kkc-length-head:              |<--------->|
161;; kkc-length-converted:         |<----->|
162;;
163(defvar kkc-overlay-head nil)
164(defvar kkc-overlay-tail nil)
165(defvar kkc-length-head nil)
166(defvar kkc-length-converted nil)
167
168;; Cursor type (`box' or `bar') of the current frame.
169(defvar kkc-cursor-type nil)
170
171;; Lookup Japanese dictionary to set list of conversions in
172;; kkc-current-conversions for key sequence kkc-current-key of length
173;; LEN.  If no conversion is found in the dictionary, don't change
174;; kkc-current-conversions and return nil.
175;; Postfixes are handled only if POSTFIX is non-nil.
176(defun kkc-lookup-key (len &optional postfix prefer-noun)
177  ;; At first, prepare cache data if any.
178  (unless kkc-init-file-flag
179    (setq kkc-init-file-flag t
180	  kkc-lookup-cache nil)
181    (add-hook 'kill-emacs-hook 'kkc-save-init-file)
182    (if (file-readable-p kkc-init-file-name)
183	(condition-case nil
184	    (load-file kkc-init-file-name)
185	  (kkc-error "Invalid data in %s" kkc-init-file-name))))
186  (or (and (nested-alist-p kkc-lookup-cache)
187	   (eq (car kkc-lookup-cache) kkc-lookup-cache-tag))
188      (setq kkc-lookup-cache (list kkc-lookup-cache-tag)
189	    kkc-init-file-flag 'kkc-lookup-cache))
190  (let ((entry (lookup-nested-alist kkc-current-key kkc-lookup-cache len 0 t)))
191    (if (consp (car entry))
192	(setq kkc-length-converted len
193	      kkc-current-conversions-width nil
194	      kkc-current-conversions (car entry))
195      (setq entry (skkdic-lookup-key kkc-current-key len postfix prefer-noun))
196      (if entry
197	  (progn
198	    (setq kkc-length-converted len
199		  kkc-current-conversions-width nil
200		  kkc-current-conversions (cons 1 entry))
201	    (if postfix
202		;; Store this conversions in the cache.
203		(progn
204		  (set-nested-alist kkc-current-key kkc-current-conversions
205				    kkc-lookup-cache kkc-length-converted)
206		  (setq kkc-init-file-flag 'kkc-lookup-cache)))
207	    t)
208	(if (= len 1)
209	    (setq kkc-length-converted 1
210		  kkc-current-conversions-width nil
211		  kkc-current-conversions (cons 0 nil)))))))
212
213(put 'kkc-error 'error-conditions '(kkc-error error))
214(defun kkc-error (&rest args)
215  (signal 'kkc-error (apply 'format args)))
216
217(defvar kkc-converting nil)
218
219;;;###autoload
220(defvar kkc-after-update-conversion-functions nil
221  "Functions to run after a conversion is selected in `japanese' input method.
222With this input method, a user can select a proper conversion from
223candidate list.  Each time he changes the selection, functions in this
224list are called with two arguments; starting and ending buffer
225positions that contains the current selection.")
226
227;;;###autoload
228(defun kkc-region (from to)
229  "Convert Kana string in the current region to Kanji-Kana mixed string.
230Users can select a desirable conversion interactively.
231When called from a program, expects two arguments,
232positions FROM and TO (integers or markers) specifying the target region.
233When it returns, the point is at the tail of the selected conversion,
234and the return value is the length of the conversion."
235  (interactive "r")
236  (setq kkc-original-kana (buffer-substring from to))
237  (goto-char from)
238
239  ;; Setup overlays.
240  (if (overlayp kkc-overlay-head)
241      (move-overlay kkc-overlay-head from to)
242    (setq kkc-overlay-head (make-overlay from to nil nil t))
243    (overlay-put kkc-overlay-head 'face 'highlight))
244  (if (overlayp kkc-overlay-tail)
245      (move-overlay kkc-overlay-tail to to)
246    (setq kkc-overlay-tail (make-overlay to to nil nil t))
247    (overlay-put kkc-overlay-tail 'face 'underline))
248
249  (setq kkc-current-key (string-to-vector kkc-original-kana))
250  (setq kkc-length-head (length kkc-current-key))
251  (setq kkc-length-converted 0)
252
253  (unwind-protect
254      ;; At first convert the region to the first candidate.
255      (let ((current-input-method-title kkc-input-method-title)
256	    (input-method-function nil)
257	    (modified-p (buffer-modified-p))
258	    (first t))
259	(while (not (kkc-lookup-key kkc-length-head nil first))
260	  (setq kkc-length-head (1- kkc-length-head)
261		first nil))
262	(goto-char to)
263	(kkc-update-conversion 'all)
264	(setq kkc-next-count 1 kkc-prev-count 0)
265	(if (and (>= kkc-next-count kkc-show-conversion-list-count)
266		 (>= (length kkc-current-conversions) 3))
267	    (kkc-show-conversion-list-or-next-group))
268
269	;; Then, ask users to select a desirable conversion.
270	(force-mode-line-update)
271	(setq kkc-converting t)
272	;; Hide "... loaded" message.
273	(message nil)
274	(while kkc-converting
275	  (set-buffer-modified-p modified-p)
276	  (let* ((overriding-terminal-local-map kkc-keymap)
277		 (help-char nil)
278		 (keyseq (read-key-sequence nil))
279		 (cmd (lookup-key kkc-keymap keyseq)))
280	    (if (commandp cmd)
281		(condition-case err
282		    (progn
283		      (cond ((eq cmd 'kkc-next)
284			     (setq kkc-next-count (1+ kkc-next-count)
285				   kkc-prev-count 0))
286			    ((eq cmd 'kkc-prev)
287			     (setq kkc-prev-count (1+ kkc-prev-count)
288				   kkc-next-count 0))
289			    (t
290			     (setq kkc-next-count 0 kkc-prev-count 0)))
291		      (call-interactively cmd))
292		  (kkc-error (message "%s" (cdr err)) (beep)))
293	      ;; KEYSEQ is not defined in KKC keymap.
294	      ;; Let's put the event back.
295	      (setq unread-input-method-events
296		    (append (string-to-list (this-single-command-raw-keys))
297			    unread-input-method-events))
298	      (kkc-terminate))))
299
300	(force-mode-line-update)
301	(goto-char (overlay-end kkc-overlay-tail))
302	(- (overlay-start kkc-overlay-head) from))
303    (delete-overlay kkc-overlay-head)
304    (delete-overlay kkc-overlay-tail)))
305
306(defun kkc-terminate ()
307  "Exit from KKC mode by fixing the current conversion."
308  (interactive)
309  (goto-char (overlay-end kkc-overlay-tail))
310  (move-overlay kkc-overlay-head (point) (point))
311  (setq kkc-converting nil))
312
313(defun kkc-cancel ()
314  "Exit from KKC mode by canceling any conversions."
315  (interactive)
316  (goto-char (overlay-start kkc-overlay-head))
317  (delete-region (overlay-start kkc-overlay-head)
318		 (overlay-end kkc-overlay-tail))
319  (insert kkc-original-kana)
320  (setq kkc-converting nil))
321
322(defun kkc-first-char-only ()
323  "Select only the first character currently converted."
324  (interactive)
325  (goto-char (overlay-start kkc-overlay-head))
326  (forward-char 1)
327  (delete-region (point) (overlay-end kkc-overlay-tail))
328  (kkc-terminate))
329
330(defun kkc-next ()
331  "Select the next candidate of conversion."
332  (interactive)
333  (let ((idx (1+ (car kkc-current-conversions))))
334    (if (< idx 0)
335	(setq idx 1))
336    (if (>= idx (length kkc-current-conversions))
337	(setq idx 0))
338    (setcar kkc-current-conversions idx)
339    (if (> idx 1)
340	(progn
341	  (set-nested-alist kkc-current-key kkc-current-conversions
342			    kkc-lookup-cache kkc-length-converted)
343	  (setq kkc-init-file-flag 'kkc-lookup-cache)))
344    (if (or kkc-current-conversions-width
345	    (>= kkc-next-count kkc-show-conversion-list-count))
346	(kkc-show-conversion-list-update))
347    (kkc-update-conversion)))
348
349(defun kkc-prev ()
350  "Select the previous candidate of conversion."
351  (interactive)
352  (let ((idx (1- (car kkc-current-conversions))))
353    (if (< idx 0)
354	(setq idx (1- (length kkc-current-conversions))))
355    (setcar kkc-current-conversions idx)
356    (if (> idx 1)
357	(progn
358	  (set-nested-alist kkc-current-key kkc-current-conversions
359			    kkc-lookup-cache kkc-length-converted)
360	  (setq kkc-init-file-flag 'kkc-lookup-cache)))
361    (if (or kkc-current-conversions-width
362	    (>= kkc-prev-count kkc-show-conversion-list-count))
363	(kkc-show-conversion-list-update))
364    (kkc-update-conversion)))
365
366(defun kkc-select-from-list ()
367  "Select one candidate from the list currently shown in echo area."
368  (interactive)
369  (let (idx)
370    (if kkc-current-conversions-width
371	(let ((len (length kkc-show-conversion-list-index-chars))
372	      (maxlen (- (aref (aref kkc-current-conversions-width 0) 1)
373			 (aref (aref kkc-current-conversions-width 0) 0)))
374	      (i 0))
375	  (if (> len maxlen)
376	      (setq len maxlen))
377	  (while (< i len)
378	    (if (= (aref kkc-show-conversion-list-index-chars i)
379		   last-input-event)
380		(setq idx i i len)
381	      (setq i (1+ i))))))
382    (if idx
383	(progn
384	  (setcar kkc-current-conversions
385		  (+ (aref (aref kkc-current-conversions-width 0) 0) idx))
386	  (kkc-show-conversion-list-update)
387	  (kkc-update-conversion))
388      (setq unread-input-method-events
389	    (cons last-input-event unread-input-method-events))
390      (kkc-terminate))))
391
392(defun kkc-katakana ()
393  "Convert to Katakana."
394  (interactive)
395  (setcar kkc-current-conversions -1)
396  (kkc-update-conversion 'all))
397
398(defun kkc-hiragana ()
399  "Convert to hiragana."
400  (interactive)
401  (setcar kkc-current-conversions 0)
402  (kkc-update-conversion))
403
404(defun kkc-shorter ()
405  "Make the Kana string to be converted shorter."
406  (interactive)
407  (if (<= kkc-length-head 1)
408      (kkc-error "Can't be shorter"))
409  (setq kkc-length-head (1- kkc-length-head))
410  (if (> kkc-length-converted kkc-length-head)
411      (let ((len kkc-length-head))
412	(setq kkc-length-converted 0)
413	(while (not (kkc-lookup-key len))
414	  (setq len (1- len)))))
415  (kkc-update-conversion 'all))
416
417(defun kkc-longer ()
418  "Make the Kana string to be converted longer."
419  (interactive)
420  (if (>= kkc-length-head (length kkc-current-key))
421      (kkc-error "Can't be longer"))
422  (setq kkc-length-head (1+ kkc-length-head))
423  ;; This time, try also entries with postfixes.
424  (kkc-lookup-key kkc-length-head 'postfix)
425  (kkc-update-conversion 'all))
426
427(defun kkc-shorter-conversion ()
428  "Make the Kana string to be converted shorter."
429  (interactive)
430  (if (<= kkc-length-converted 1)
431      (kkc-error "Can't be shorter"))
432  (let ((len (1- kkc-length-converted)))
433    (setq kkc-length-converted 0)
434    (while (not (kkc-lookup-key len))
435      (setq len (1- len))))
436  (kkc-update-conversion 'all))
437
438(defun kkc-longer-phrase ()
439  "Make the current phrase (BUNSETSU) longer without looking up dictionary."
440  (interactive)
441  (if (>= kkc-length-head (length kkc-current-key))
442      (kkc-error "Can't be longer"))
443  (setq kkc-length-head (1+ kkc-length-head))
444  (kkc-update-conversion 'all))
445
446(defun kkc-next-phrase ()
447  "Fix the currently converted string and try to convert the remaining string."
448  (interactive)
449  (if (>= kkc-length-head (length kkc-current-key))
450      (kkc-terminate)
451    (setq kkc-length-head (- (length kkc-current-key) kkc-length-head))
452    (goto-char (overlay-end kkc-overlay-head))
453    (while (and (< (point) (overlay-end kkc-overlay-tail))
454		(looking-at "\\CH"))
455      (goto-char (match-end 0))
456      (setq kkc-length-head (1- kkc-length-head)))
457    (if (= kkc-length-head 0)
458	(kkc-terminate)
459      (let ((newkey (make-vector kkc-length-head 0))
460	    (idx (- (length kkc-current-key) kkc-length-head))
461	    (len kkc-length-head)
462	    (i 0))
463	;; For the moment, (setq kkc-original-kana (concat newkey))
464	;; doesn't work.
465	(setq kkc-original-kana "")
466	(while (< i kkc-length-head)
467	  (aset newkey i (aref kkc-current-key (+ idx i)))
468	  (setq kkc-original-kana
469		(concat kkc-original-kana (char-to-string (aref newkey i))))
470	  (setq i (1+ i)))
471	(setq kkc-current-key newkey)
472	(setq kkc-length-converted 0)
473	(while (and (not (kkc-lookup-key kkc-length-head nil
474					 (< kkc-length-head len)))
475		    (> kkc-length-head 1))
476	  (setq kkc-length-head (1- kkc-length-head)))
477	(let ((pos (point))
478	      (tail (overlay-end kkc-overlay-tail)))
479	  (move-overlay kkc-overlay-head pos tail)
480	  (move-overlay kkc-overlay-tail tail tail))
481	(kkc-update-conversion 'all)))))
482
483;; We'll show users a list of available conversions in echo area with
484;; index numbers so that users can select one conversion with the
485;; number.
486
487;; Set `kkc-current-conversions-width'.
488(defun kkc-setup-current-conversions-width ()
489  (let ((convs (cdr kkc-current-conversions))
490	(len (length kkc-current-conversions))
491	(idx 1))
492    (setq kkc-current-conversions-width (make-vector len nil))
493    ;; To tell `kkc-show-conversion-list-update' to generate
494    ;; message from scratch.
495    (aset kkc-current-conversions-width 0 (vector len -2 nil))
496    ;; Fill the remaining slots.
497    (while convs
498      (aset kkc-current-conversions-width idx
499	    (+ (string-width (car convs)) 4))
500      (setq convs (cdr convs)
501	    idx (1+ idx)))))
502
503(defun kkc-show-conversion-list-or-next-group ()
504  "Show list of available conversions in echo area with index numbers.
505If the list is already shown, show the next group of conversions,
506and change the current conversion to the first one in the group."
507  (interactive)
508  (if (< (length kkc-current-conversions) 3)
509      (kkc-error "No alternative"))
510  (if kkc-current-conversions-width
511      (let ((next-idx (aref (aref kkc-current-conversions-width 0) 1)))
512	(if (< next-idx (length kkc-current-conversions-width))
513	    (setcar kkc-current-conversions next-idx)
514	  (setcar kkc-current-conversions 1))
515	(kkc-show-conversion-list-update)
516	(kkc-update-conversion))
517    (kkc-setup-current-conversions-width)
518    (kkc-show-conversion-list-update)))
519
520(defun kkc-show-conversion-list-or-prev-group ()
521  "Show list of available conversions in echo area with index numbers.
522If the list is already shown, show the previous group of conversions,
523and change the current conversion to the last one in the group."
524  (interactive)
525  (if (< (length kkc-current-conversions) 3)
526      (kkc-error "No alternative"))
527  (if kkc-current-conversions-width
528      (let ((this-idx (aref (aref kkc-current-conversions-width 0) 0)))
529	(if (> this-idx 1)
530	    (setcar kkc-current-conversions (1- this-idx))
531	  (setcar kkc-current-conversions
532		  (1- (length kkc-current-conversions-width))))
533	(kkc-show-conversion-list-update)
534	(kkc-update-conversion))
535    (kkc-setup-current-conversions-width)
536    (kkc-show-conversion-list-update)))
537
538;; Update the conversion list shown in echo area.
539(defun kkc-show-conversion-list-update ()
540  (or kkc-current-conversions-width
541      (kkc-setup-current-conversions-width))
542  (let* ((current-idx (car kkc-current-conversions))
543	 (first-slot (aref kkc-current-conversions-width 0))
544	 (this-idx (aref first-slot 0))
545	 (next-idx (aref first-slot 1))
546	 (msg (aref first-slot 2)))
547    (if (< current-idx this-idx)
548	;; The currently selected conversion is before the list shown
549	;; previously.  We must start calculation of message width
550	;; from the start again.
551	(setq this-idx 1 msg nil)
552      (if (>= current-idx next-idx)
553	  ;; The currently selected conversion is after the list shown
554	  ;; previously.  We start calculation of message width from
555	  ;; the conversion next of TO.
556	  (setq this-idx next-idx msg nil)))
557    (if (not msg)
558	(let ((len (length kkc-current-conversions))
559	      (max-width (window-width (minibuffer-window)))
560	      (width-table kkc-current-conversions-width)
561	      (width 0)
562	      (idx this-idx)
563	      (max-items (length kkc-show-conversion-list-index-chars))
564	      l)
565	  ;; Set THIS-IDX to the first index of conversion to be shown
566	  ;; in MSG, and reflect it in kkc-current-conversions-width.
567	  (while (<= idx current-idx)
568	    (if (and (<= (+ width (aref width-table idx)) max-width)
569		     (< (- idx this-idx) max-items))
570		(setq width (+ width (aref width-table idx)))
571	      (setq this-idx idx width (aref width-table idx)))
572	    (setq idx (1+ idx)
573		  l (cdr l)))
574	  (aset first-slot 0 this-idx)
575	  ;; Set NEXT-IDX to the next index of the last conversion
576	  ;; shown in MSG, and reflect it in
577	  ;; kkc-current-conversions-width.
578	  (while (and (< idx len)
579		      (<= (+ width (aref width-table idx)) max-width)
580		      (< (- idx this-idx) max-items))
581	    (setq width (+ width (aref width-table idx))
582		  idx (1+ idx)
583		  l (cdr l)))
584	  (aset first-slot 1 (setq next-idx idx))
585	  (setq l (nthcdr this-idx kkc-current-conversions))
586	  (setq msg (format " %c %s"
587			    (aref kkc-show-conversion-list-index-chars 0)
588			    (propertize (car l)
589					'kkc-conversion-index this-idx))
590		idx (1+ this-idx)
591		l (cdr l))
592	  (while (< idx next-idx)
593	    (setq msg (format "%s  %c %s"
594			      msg
595			      (aref kkc-show-conversion-list-index-chars
596				    (- idx this-idx))
597			      (propertize (car l)
598					  'kkc-conversion-index idx))
599		  idx (1+ idx)
600		  l (cdr l)))
601	  (aset first-slot 2 msg)))
602
603    ;; Highlight the current conversion.
604    (if (> current-idx 0)
605	(let ((pos 3)
606	      (limit (length msg)))
607	  (remove-text-properties 0 (length msg) '(face nil) msg)
608	  (while (not (eq (get-text-property pos 'kkc-conversion-index msg)
609			  current-idx))
610	    (setq pos (next-single-property-change pos 'kkc-conversion-index
611						   msg limit)))
612	  (put-text-property pos (next-single-property-change
613				  pos 'kkc-conversion-index msg limit)
614			     'face 'highlight msg)))
615    (let ((message-log-max nil))
616      (message "%s" msg))))
617
618;; Update the conversion area with the latest conversion selected.
619;; ALL if non nil means to update the whole area, else update only
620;; inside quail-overlay-head.
621
622(defun kkc-update-conversion (&optional all)
623  (goto-char (overlay-start kkc-overlay-head))
624  (cond ((= (car kkc-current-conversions) 0) ; Hiragana
625	 (let ((i 0))
626	   (while (< i kkc-length-converted)
627	     (insert (aref kkc-current-key i))
628	     (setq i (1+ i)))))
629	((= (car kkc-current-conversions) -1) ; Katakana
630	 (let ((i 0))
631	   (while (< i kkc-length-converted)
632	     (insert (japanese-katakana (aref kkc-current-key i)))
633	     (setq i (1+ i)))))
634	(t
635	 (insert (nth (car kkc-current-conversions) kkc-current-conversions))))
636  (delete-region (point) (overlay-start kkc-overlay-tail))
637  (if all
638      (let ((len (length kkc-current-key))
639	    (i kkc-length-converted))
640	(delete-region (overlay-start kkc-overlay-tail)
641		       (overlay-end kkc-overlay-head))
642	(while (< i kkc-length-head)
643	  (if (= (car kkc-current-conversions) -1)
644	      (insert (japanese-katakana (aref kkc-current-key i)))
645	    (insert (aref kkc-current-key i)))
646	  (setq i (1+ i)))
647	(let ((pos (point)))
648	  (while (< i len)
649	    (insert (aref kkc-current-key i))
650	    (setq i (1+ i)))
651	  (move-overlay kkc-overlay-head
652			(overlay-start kkc-overlay-head) pos)
653	  (delete-region (point) (overlay-end kkc-overlay-tail)))))
654  (unwind-protect
655      (run-hook-with-args 'kkc-after-update-conversion-functions
656			  (overlay-start kkc-overlay-head)
657			  (overlay-end kkc-overlay-head))
658    (goto-char (overlay-end kkc-overlay-tail))))
659
660;;
661(provide 'kkc)
662
663;;; arch-tag: 3cbfd56e-74e6-4f60-bb46-ba7c2d366fbf
664;;; kkc.el ends here
665