lisp/international/kkc.el

   1 ;;; kkc.el --- Kana Kanji converter    -*- coding: iso-2022-7bit; -*-
   2
   3 ;; Copyright (C) 1997, 1998, 2001, 2002, 2003, 2004, 2005,
   4 ;;   2006, 2007, 2008  Free Software Foundation, Inc.
   5 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   6 ;;   2005, 2006, 2007, 2008
   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 3, 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 "\e$B4A\e(B"
  43   "String denoting KKC input method.
  44 This 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.
 141 When you type SPC or C-p successively this count while using the input
 142 method `japanese', the conversion candidates are shown in the echo
 143 area 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.
 222 With this input method, a user can select a proper conversion from
 223 candidate list.  Each time he changes the selection, functions in this
 224 list are called with two arguments; starting and ending buffer
 225 positions 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.
 230 Users can select a desirable conversion interactively.
 231 When called from a program, expects two arguments,
 232 positions FROM and TO (integers or markers) specifying the target region.
 233 When it returns, the point is at the tail of the selected conversion,
 234 and 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.
 505 If the list is already shown, show the next group of conversions,
 506 and 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.
 522 If the list is already shown, show the previous group of conversions,
 523 and 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