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   1 ;;; x-compose.el --- Compose-key processing in XEmacs
   2
   3 ;; Copyright (C) 1992, 1993, 1997 Free Software Foundation, Inc.
   4
   5 ;; Author: Jamie Zawinski <jwz@jwz.org>
   6 ;; Maintainer: XEmacs Development Team
   7 ;; Rewritten by Martin Buchholz far too many times.
   8 ;;
   9 ;; Changed: 11 Jun 1997 by Heiko Muenkel <muenkel@tnt.uni-hannover.de>
  10 ;;      The degree sign couldn't be inserted with the old version.
  11 ;; Keywords: i18n
  12
  13 ;; This file is part of XEmacs.
  14
  15 ;; XEmacs is free software; you can redistribute it and/or modify it
  16 ;; under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation; either version 2, or (at your option)
  18 ;; any later version.
  19
  20 ;; XEmacs is distributed in the hope that it will be useful, but
  21 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23 ;; General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with XEmacs; see the file COPYING.  If not, write to the
  27 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  28 ;; Boston, MA 02111-1307, USA.
  29
  30 ;;; Synched up with: Not in FSF.
  31
  32 ;;; Commentary:
  33
  34 ;; created by jwz, 14-jun-92.
  35 ;;; changed by Jan Vroonhof, July 1997: Use function-key-map instead
  36 ;;;                                     of global map.
  37 ;;;                                     Preliminary support for
  38 ;;;                                     XFree86 deadkeys
  39
  40 ;; This file implements DEC-, OpenWindows-, and HP-compatible "Compose"
  41 ;; processing for XEmacs.
  42
  43 ;; If you are running a version of X which already does compose processing,
  44 ;; then you don't need this file.  But the MIT R4 and R5 distributions don't
  45 ;; do compose processing, so you may want to fake it by using this code.
  46
  47 ;; The basic idea is that there are several ways to generate keysyms which
  48 ;; do not have keys devoted to them on your keyboard.
  49
  50 ;; The first method is by using "dead" keys.  A dead key is a key which,
  51 ;; when typed, does not insert a character.  Instead it modifies the
  52 ;; following character typed.  So if you typed "dead-tilde" followed by "A",
  53 ;; then "A-tilde" would be inserted.  Of course, this requires you to modify
  54 ;; your keyboard to include a "dead-tilde" key on it somewhere.
  55
  56 ;; The second method is by using a "Compose" key.  With a Compose key, you
  57 ;; would type "Compose" then "tilde" then "A" to insert "A-tilde".
  58
  59 ;; There are a small number of dead keys: acute, grave, cedilla, diaeresis,
  60 ;; circumflex, tilde, and ring.  There are a larger number of accented and
  61 ;; other characters accessible via the Compose key, so both are useful.
  62
  63 ;; To use this code, you will need to have a Compose key on your keyboard.
  64 ;; The default configuration of most X keyboards doesn't contain one.  You
  65 ;; can, for example, turn the right "Meta" key into a "Compose" key with
  66 ;; this command:
  67
  68 ;;    xmodmap -e "remove mod1 = Meta_R" -e "keysym Meta_R = Multi_key"
  69
  70 ;; Multi-key is the name that X (and emacs) know the "Compose" key by.
  71 ;; The "remove..." command is necessary because the "Compose" key must not
  72 ;; have any modifier bits associated with it.  This exact command may not
  73 ;; work, depending on what system and keyboard you are using.  If it
  74 ;; doesn't, you'll have to read the man page for xmodmap.  You might want
  75 ;; to get the "xkeycaps" program from
  76 ;; <URL:http://www.jwz.org/xkeycaps/>,
  77 ;; which is a graphical front end to xmodmap
  78 ;; that hides xmodmap's arcane syntax from you.
  79
  80 ;; If for some reason you don't want to have a dedicated compose key on your
  81 ;; keyboard, you can use some other key as the prefix.  For example, to make
  82 ;; "Meta-Shift-C" act as a compose key (so that "M-C , c" would insert the
  83 ;; character "ccedilla") you could do
  84
  85 ;;    (global-set-key "\M-C" compose-map)
  86
  87 ;; I believe the bindings encoded in this file are the same as those used
  88 ;; by OpenWindows versions 2 and 3, and DEC VT320 terminals.  Please let me
  89 ;; know if you think otherwise.
  90
  91 ;; Much thanks to Justin Bur <justin@crim.ca> for helping me understand how
  92 ;; this stuff is supposed to work.
  93
  94 ;; You also might want to consider getting Justin's patch for the MIT Xlib
  95 ;; that implements compose processing in the library.  This will enable
  96 ;; compose processing in applications other than emacs as well.  You can
  97 ;; get it from export.lcs.mit.edu in contrib/compose.tar.Z.
  98
  99 ;; This code has one feature that a more "builtin" Compose mechanism could
 100 ;; not have: at any point you can type C-h to get a list of the possible
 101 ;; completions of what you have typed so far.
 102
 103 ;;; Code:
 104
 105 (require 'x-iso8859-1)
 106
 107 (macrolet
 108     ((define-compose-map (keymap-symbol)
 109        `(progn
 110           (defconst ,keymap-symbol (make-sparse-keymap ',keymap-symbol))
 111           ;; Required to tell XEmacs the keymaps were actually autoloaded.
 112           ;; #### Make this unnecessary!
 113           (fset ',keymap-symbol ,keymap-symbol))))
 114
 115   (define-compose-map compose-map)
 116   (define-compose-map compose-acute-map)
 117   (define-compose-map compose-grave-map)
 118   (define-compose-map compose-cedilla-map)
 119   (define-compose-map compose-diaeresis-map)
 120   (define-compose-map compose-circumflex-map)
 121   (define-compose-map compose-tilde-map)
 122   (define-compose-map compose-ring-map))
 123
 124 (define-key compose-map 'acute      compose-acute-map)
 125 (define-key compose-map 'grave      compose-grave-map)
 126 (define-key compose-map 'cedilla    compose-cedilla-map)
 127 (define-key compose-map 'diaeresis  compose-diaeresis-map)
 128 (define-key compose-map 'circumflex compose-circumflex-map)
 129 (define-key compose-map 'tilde      compose-tilde-map)
 130 (define-key compose-map 'degree     compose-ring-map)
 131
 132 ;;(define-key function-key-map [multi-key] compose-map)
 133
 134 ;; The following is necessary, because one can't rebind [degree]
 135 ;; and use it to insert the degree sign!
 136 ;;(defun compose-insert-degree ()
 137 ;;  "Inserts a degree sign."
 138 ;;  (interactive)
 139 ;;  (insert ?\260))
 140
 141 (define-key compose-map [acute]         compose-acute-map)
 142 (define-key compose-map [?']            compose-acute-map)
 143 (define-key compose-map [grave]         compose-grave-map)
 144 (define-key compose-map [?`]            compose-grave-map)
 145 (define-key compose-map [cedilla]       compose-cedilla-map)
 146 (define-key compose-map [?,]            compose-cedilla-map)
 147 (define-key compose-map [diaeresis]     compose-diaeresis-map)
 148 (define-key compose-map [?\"]           compose-diaeresis-map)
 149 (define-key compose-map [circumflex]    compose-circumflex-map)
 150 (define-key compose-map [?^]            compose-circumflex-map)
 151 (define-key compose-map [tilde]         compose-tilde-map)
 152 (define-key compose-map [~]             compose-tilde-map)
 153 (define-key compose-map [degree]        compose-ring-map)
 154 (define-key compose-map [?*]            compose-ring-map)
 155
 156 \f
 157 ;;; The contents of the "dead key" maps.  These are shared by the
 158 ;;; compose-map.
 159
 160 (define-key compose-acute-map [space]   "'")
 161 (define-key compose-acute-map [?']      [acute])
 162 (define-key compose-acute-map [?A]      [Aacute])
 163 (define-key compose-acute-map [E]       [Eacute])
 164 (define-key compose-acute-map [I]       [Iacute])
 165 (define-key compose-acute-map [O]       [Oacute])
 166 (define-key compose-acute-map [U]       [Uacute])
 167 (define-key compose-acute-map [Y]       [Yacute])
 168 (define-key compose-acute-map [a]       [aacute])
 169 (define-key compose-acute-map [e]       [eacute])
 170 (define-key compose-acute-map [i]       [iacute])
 171 (define-key compose-acute-map [o]       [oacute])
 172 (define-key compose-acute-map [u]       [uacute])
 173 (define-key compose-acute-map [y]       [yacute])
 174
 175 (define-key compose-grave-map [space]   "`")
 176 (define-key compose-grave-map [?`]      [grave])
 177 (define-key compose-grave-map [A]       [Agrave])
 178 (define-key compose-grave-map [E]       [Egrave])
 179 (define-key compose-grave-map [I]       [Igrave])
 180 (define-key compose-grave-map [O]       [Ograve])
 181 (define-key compose-grave-map [U]       [Ugrave])
 182 (define-key compose-grave-map [a]       [agrave])
 183 (define-key compose-grave-map [e]       [egrave])
 184 (define-key compose-grave-map [i]       [igrave])
 185 (define-key compose-grave-map [o]       [ograve])
 186 (define-key compose-grave-map [u]       [ugrave])
 187
 188 (define-key compose-cedilla-map [space] ",")
 189 (define-key compose-cedilla-map [?,]    [cedilla])
 190 (define-key compose-cedilla-map [C]     [Ccedilla])
 191 (define-key compose-cedilla-map [c]     [ccedilla])
 192
 193 (define-key compose-diaeresis-map [space] [diaeresis])
 194 (define-key compose-diaeresis-map [?\"] [diaeresis])
 195 (define-key compose-diaeresis-map [A]   [Adiaeresis])
 196 (define-key compose-diaeresis-map [E]   [Ediaeresis])
 197 (define-key compose-diaeresis-map [I]   [Idiaeresis])
 198 (define-key compose-diaeresis-map [O]   [Odiaeresis])
 199 (define-key compose-diaeresis-map [U]   [Udiaeresis])
 200 (define-key compose-diaeresis-map [a]   [adiaeresis])
 201 (define-key compose-diaeresis-map [e]   [ediaeresis])
 202 (define-key compose-diaeresis-map [i]   [idiaeresis])
 203 (define-key compose-diaeresis-map [o]   [odiaeresis])
 204 (define-key compose-diaeresis-map [u]   [udiaeresis])
 205 (define-key compose-diaeresis-map [y]   [ydiaeresis])
 206
 207 (define-key compose-circumflex-map [space] "^")
 208 (define-key compose-circumflex-map [?/] "|")
 209 (define-key compose-circumflex-map [?!] [brokenbar])
 210 (define-key compose-circumflex-map [?-] [macron])
 211 (define-key compose-circumflex-map [?_] [macron])
 212 (define-key compose-circumflex-map [?0] [degree])
 213 (define-key compose-circumflex-map [?1] [onesuperior])
 214 (define-key compose-circumflex-map [?2] [twosuperior])
 215 (define-key compose-circumflex-map [?3] [threesuperior])
 216 (define-key compose-circumflex-map [?.] [periodcentered])
 217 (define-key compose-circumflex-map [A]  [Acircumflex])
 218 (define-key compose-circumflex-map [E]  [Ecircumflex])
 219 (define-key compose-circumflex-map [I]  [Icircumflex])
 220 (define-key compose-circumflex-map [O]  [Ocircumflex])
 221 (define-key compose-circumflex-map [U]  [Ucircumflex])
 222 (define-key compose-circumflex-map [a]  [acircumflex])
 223 (define-key compose-circumflex-map [e]  [ecircumflex])
 224 (define-key compose-circumflex-map [i]  [icircumflex])
 225 (define-key compose-circumflex-map [o]  [ocircumflex])
 226 (define-key compose-circumflex-map [u]  [ucircumflex])
 227
 228 (define-key compose-tilde-map [space]   "~")
 229 (define-key compose-tilde-map [A]       [Atilde])
 230 (define-key compose-tilde-map [N]       [Ntilde])
 231 (define-key compose-tilde-map [O]       [Otilde])
 232 (define-key compose-tilde-map [a]       [atilde])
 233 (define-key compose-tilde-map [n]       [ntilde])
 234 (define-key compose-tilde-map [o]       [otilde])
 235
 236 (define-key compose-ring-map [space]    [degree])
 237 (define-key compose-ring-map [A]        [Aring])
 238 (define-key compose-ring-map [a]        [aring])
 239
 240 \f
 241 ;;; The rest of the compose-map.  These are the composed characters
 242 ;;; that are not accessible via "dead" keys.
 243
 244 (define-key compose-map " '"    "'")
 245 (define-key compose-map " ^"    "^")
 246 (define-key compose-map " `"    "`")
 247 (define-key compose-map " ~"    "~")
 248 (define-key compose-map "  "    [nobreakspace])
 249 (define-key compose-map " \""   [diaeresis])
 250 (define-key compose-map " :"    [diaeresis])
 251 (define-key compose-map " *"    [degree])
 252
 253 (define-key compose-map "!!"    [exclamdown])
 254 (define-key compose-map "!^"    [brokenbar])
 255 (define-key compose-map "!S"    [section])
 256 (define-key compose-map "!s"    [section])
 257 (define-key compose-map "!P"    [paragraph])
 258 (define-key compose-map "!p"    [paragraph])
 259
 260 (define-key compose-map "(("    "[")
 261 (define-key compose-map "(-"    "{")
 262
 263 (define-key compose-map "))"    "]")
 264 (define-key compose-map ")-"    "}")
 265
 266 (define-key compose-map "++"    "#")
 267 (define-key compose-map "+-"    [plusminus])
 268
 269 (define-key compose-map "-("    "{")
 270 (define-key compose-map "-)"    "}")
 271 (define-key compose-map "--"    "-")
 272 (define-key compose-map "-L"    [sterling])
 273 (define-key compose-map "-l"    [sterling])
 274 (define-key compose-map "-Y"    [yen])
 275 (define-key compose-map "-y"    [yen])
 276 (define-key compose-map "-,"    [notsign])
 277 (define-key compose-map "-|"    [notsign])
 278 (define-key compose-map "-^"    [macron])
 279 (define-key compose-map "-+"    [plusminus])
 280 (define-key compose-map "-:"    [division])
 281 (define-key compose-map "-D"    [ETH])
 282 (define-key compose-map "-d"    [eth])
 283 (define-key compose-map "-a"    [ordfeminine])
 284
 285 (define-key compose-map ".^"    [periodcentered])
 286
 287 (define-key compose-map "//"    "\\")
 288 (define-key compose-map "/<"    "\\")
 289 (define-key compose-map "/^"    "|")
 290 (define-key compose-map "/C"    [cent])
 291 (define-key compose-map "/c"    [cent])
 292 (define-key compose-map "/U"    [mu])
 293 (define-key compose-map "/u"    [mu])
 294 (define-key compose-map "/O"    [Ooblique])
 295 (define-key compose-map "/o"    [oslash])
 296
 297 (define-key compose-map "0X"    [currency])
 298 (define-key compose-map "0x"    [currency])
 299 (define-key compose-map "0S"    [section])
 300 (define-key compose-map "0s"    [section])
 301 (define-key compose-map "0C"    [copyright])
 302 (define-key compose-map "0c"    [copyright])
 303 (define-key compose-map "0R"    [registered])
 304 (define-key compose-map "0r"    [registered])
 305 (define-key compose-map "0^"    [degree])
 306
 307 (define-key compose-map "1^"    [onesuperior])
 308 (define-key compose-map "14"    [onequarter])
 309 (define-key compose-map "12"    [onehalf])
 310
 311 (define-key compose-map "2^"    [twosuperior])
 312
 313 (define-key compose-map "3^"    [threesuperior])
 314 (define-key compose-map "34"    [threequarters])
 315
 316 (define-key compose-map ":-"    [division])
 317
 318 (define-key compose-map "</"    "\\")
 319 (define-key compose-map "<<"    [guillemotleft])
 320
 321 (define-key compose-map "=L"    [sterling])
 322 (define-key compose-map "=l"    [sterling])
 323 (define-key compose-map "=Y"    [yen])
 324 (define-key compose-map "=y"    [yen])
 325
 326 (define-key compose-map ">>"    [guillemotright])
 327
 328 (define-key compose-map "??"    [questiondown])
 329
 330 (define-key compose-map "AA"    "@")
 331 (define-key compose-map "Aa"    "@")
 332 (define-key compose-map "A_"    [ordfeminine])
 333 (define-key compose-map "A`"    [Agrave])
 334 (define-key compose-map "A'"    [Aacute])
 335 (define-key compose-map "A^"    [Acircumflex])
 336 (define-key compose-map "A~"    [Atilde])
 337 (define-key compose-map "A\""   [Adiaeresis])
 338 (define-key compose-map "A*"    [Aring])
 339 (define-key compose-map "AE"    [AE])
 340
 341 (define-key compose-map "C/"    [cent])
 342 (define-key compose-map "C|"    [cent])
 343 (define-key compose-map "C0"    [copyright])
 344 (define-key compose-map "CO"    [copyright])
 345 (define-key compose-map "Co"    [copyright])
 346 (define-key compose-map "C,"    [Ccedilla])
 347
 348 (define-key compose-map "D-"    [ETH])
 349
 350 (define-key compose-map "E`"    [Egrave])
 351 (define-key compose-map "E'"    [Eacute])
 352 (define-key compose-map "E^"    [Ecircumflex])
 353 (define-key compose-map "E\""   [Ediaeresis])
 354
 355 (define-key compose-map "I`"    [Igrave])
 356 (define-key compose-map "I'"    [Iacute])
 357 (define-key compose-map "I^"    [Icircumflex])
 358 (define-key compose-map "I\""   [Idiaeresis])
 359
 360 (define-key compose-map "L-"    [sterling])
 361 (define-key compose-map "L="    [sterling])
 362
 363 (define-key compose-map "N~"    [Ntilde])
 364
 365 (define-key compose-map "OX"    [currency])
 366 (define-key compose-map "Ox"    [currency])
 367 (define-key compose-map "OS"    [section])
 368 (define-key compose-map "Os"    [section])
 369 (define-key compose-map "OC"    [copyright])
 370 (define-key compose-map "Oc"    [copyright])
 371 (define-key compose-map "OR"    [registered])
 372 (define-key compose-map "Or"    [registered])
 373 (define-key compose-map "O_"    [masculine])
 374 (define-key compose-map "O`"    [Ograve])
 375 (define-key compose-map "O'"    [Oacute])
 376 (define-key compose-map "O^"    [Ocircumflex])
 377 (define-key compose-map "O~"    [Otilde])
 378 (define-key compose-map "O\""   [Odiaeresis])
 379 (define-key compose-map "O/"    [Ooblique])
 380
 381 (define-key compose-map "P!"    [paragraph])
 382
 383 (define-key compose-map "R0"    [registered])
 384 (define-key compose-map "RO"    [registered])
 385 (define-key compose-map "Ro"    [registered])
 386
 387 (define-key compose-map "S!"    [section])
 388 (define-key compose-map "S0"    [section])
 389 (define-key compose-map "SO"    [section])
 390 (define-key compose-map "So"    [section])
 391 (define-key compose-map "SS"    [ssharp])
 392
 393 (define-key compose-map "TH"    [THORN])
 394
 395 (define-key compose-map "U`"    [Ugrave])
 396 (define-key compose-map "U'"    [Uacute])
 397 (define-key compose-map "U^"    [Ucircumflex])
 398 (define-key compose-map "U\""   [Udiaeresis])
 399
 400 (define-key compose-map "X0"    [currency])
 401 (define-key compose-map "XO"    [currency])
 402 (define-key compose-map "Xo"    [currency])
 403
 404 (define-key compose-map "Y-"    [yen])
 405 (define-key compose-map "Y="    [yen])
 406 (define-key compose-map "Y'"    [Yacute])
 407
 408 (define-key compose-map "_A"    [ordfeminine])
 409 (define-key compose-map "_a"    [ordfeminine])
 410 (define-key compose-map "_^"    [macron])
 411 (define-key compose-map "_O"    [masculine])
 412 (define-key compose-map "_o"    [masculine])
 413
 414 (define-key compose-map "aA"    "@")
 415 (define-key compose-map "aa"    "@")
 416 (define-key compose-map "a_"    [ordfeminine])
 417 (define-key compose-map "a-"    [ordfeminine])
 418 (define-key compose-map "a`"    [agrave])
 419 (define-key compose-map "a'"    [aacute])
 420 (define-key compose-map "a^"    [acircumflex])
 421 (define-key compose-map "a~"    [atilde])
 422 (define-key compose-map "a\""   [adiaeresis])
 423 (define-key compose-map "a*"    [aring])
 424 (define-key compose-map "ae"    [ae])
 425
 426 (define-key compose-map "c/"    [cent])
 427 (define-key compose-map "c|"    [cent])
 428 (define-key compose-map "c0"    [copyright])
 429 (define-key compose-map "cO"    [copyright])
 430 (define-key compose-map "co"    [copyright])
 431 (define-key compose-map "c,"    [ccedilla])
 432
 433 (define-key compose-map "d-"    [eth])
 434
 435 (define-key compose-map "e`"    [egrave])
 436 (define-key compose-map "e'"    [eacute])
 437 (define-key compose-map "e^"    [ecircumflex])
 438 (define-key compose-map "e\""   [ediaeresis])
 439
 440 (define-key compose-map "i`"    [igrave])
 441 (define-key compose-map "i'"    [iacute])
 442 (define-key compose-map "i^"    [icircumflex])
 443 (define-key compose-map "i\""   [idiaeresis])
 444 (define-key compose-map "i:"    [idiaeresis])
 445
 446 (define-key compose-map "l-"    [sterling])
 447 (define-key compose-map "l="    [sterling])
 448
 449 (define-key compose-map "n~"    [ntilde])
 450
 451 (define-key compose-map "oX"    [currency])
 452 (define-key compose-map "ox"    [currency])
 453 (define-key compose-map "oC"    [copyright])
 454 (define-key compose-map "oc"    [copyright])
 455 (define-key compose-map "oR"    [registered])
 456 (define-key compose-map "or"    [registered])
 457 (define-key compose-map "oS"    [section])
 458 (define-key compose-map "os"    [section])
 459 (define-key compose-map "o_"    [masculine])
 460 (define-key compose-map "o`"    [ograve])
 461 (define-key compose-map "o'"    [oacute])
 462 (define-key compose-map "o^"    [ocircumflex])
 463 (define-key compose-map "o~"    [otilde])
 464 (define-key compose-map "o\""   [odiaeresis])
 465 (define-key compose-map "o/"    [oslash])
 466
 467 (define-key compose-map "p!"    [paragraph])
 468
 469 (define-key compose-map "r0"    [registered])
 470 (define-key compose-map "rO"    [registered])
 471 (define-key compose-map "ro"    [registered])
 472
 473 (define-key compose-map "s!"    [section])
 474 (define-key compose-map "s0"    [section])
 475 (define-key compose-map "sO"    [section])
 476 (define-key compose-map "so"    [section])
 477 (define-key compose-map "ss"    [ssharp])
 478
 479 (define-key compose-map "th"    [thorn])
 480
 481 (define-key compose-map "u`"    [ugrave])
 482 (define-key compose-map "u'"    [uacute])
 483 (define-key compose-map "u^"    [ucircumflex])
 484 (define-key compose-map "u\""   [udiaeresis])
 485 (define-key compose-map "u/"    [mu])
 486
 487 (define-key compose-map "x0"    [currency])
 488 (define-key compose-map "xO"    [currency])
 489 (define-key compose-map "xo"    [currency])
 490 (define-key compose-map "xx"    [multiply])
 491
 492 (define-key compose-map "y-"    [yen])
 493 (define-key compose-map "y="    [yen])
 494 (define-key compose-map "y'"    [yacute])
 495 (define-key compose-map "y\""   [ydiaeresis])
 496
 497 (define-key compose-map "|C"    [cent])
 498 (define-key compose-map "|c"    [cent])
 499 (define-key compose-map "||"    [brokenbar])
 500
 501 \f
 502 ;; Suppose we type these three physical keys: [Multi_key " a]
 503 ;; Xlib can deliver these keys as the following sequences of keysyms:
 504 ;;
 505 ;; - [Multi_key " a] (no surprise here)
 506 ;; - [adiaeresis] (OK, Xlib is doing compose processing for us)
 507 ;; - [Multi_key " adiaeresis] (Huh?)
 508 ;;
 509 ;; It is the last possibility that is arguably a bug.  Xlib can't
 510 ;; decide whether it's really doing compose processing or not (or
 511 ;; actually, different parts of Xlib disagree).
 512 ;;
 513 ;; So we'll just convert [Multi_key " adiaeresis] to [adiaeresis]
 514 (defun xlib-input-method-bug-workaround (keymap)
 515   (map-keymap
 516    (lambda (key value)
 517      (cond
 518       ((keymapp value)
 519        (xlib-input-method-bug-workaround value))
 520       ((and (sequencep value)
 521             (eq 1 (length value))
 522             (null (lookup-key keymap value)))
 523        (define-key keymap value value))))
 524    keymap
 525    ;; #### It is currently not safe to add definitions to a keymap in
 526    ;; map-keymap, due to a bug in map-keymap (dangling pointer to freed
 527    ;; memory on a rehash).  So we sort, which has the side effect of
 528    ;; mapping over a copy of the original hash-table.
 529    t))
 530 (xlib-input-method-bug-workaround compose-map)
 531 (unintern 'xlib-input-method-bug-workaround)
 532
 533 ;; While we're at it, a similar mechanism will make colon equivalent
 534 ;; to doublequote for diaeresis processing.  Some Xlibs do this.
 535 (defun alias-colon-to-doublequote (keymap)
 536   (map-keymap
 537    (lambda (key value)
 538      (when (keymapp value)
 539        (alias-colon-to-doublequote value))
 540      (when (eq key '\")
 541        (define-key keymap ":" value)))
 542    keymap
 543    ;; #### It is currently not safe to add definitions to a keymap in
 544    ;; map-keymap, due to a bug in map-keymap (dangling pointer to freed
 545    ;; memory on a rehash).  So we sort, which has the side effect of
 546    ;; mapping over a copy of the original hash-table.
 547    t))
 548 (alias-colon-to-doublequote compose-map)
 549 (unintern 'alias-colon-to-doublequote)
 550
 551 ;;; Electric dead keys: making a' mean a-acute.
 552
 553 \f
 554 (defun electric-diacritic (&optional count)
 555   "Modify the previous character with an accent.
 556 For example, if `:' is bound to this command, then typing `a:'
 557 will first insert `a' and then turn it into `\344' (adiaeresis).
 558 The keys to which this command may be bound (and the accents
 559 which it understands) are:
 560
 561    '  (acute)       \301\311\315\323\332\335 \341\351\355\363\372\375
 562    `  (grave)       \300\310\314\322\331 \340\350\354\362\371
 563    :  (diaeresis)   \304\313\317\326\334 \344\353\357\366\374\377
 564    ^  (circumflex)  \302\312\316\324\333 \342\352\356\364\373
 565    ,  (cedilla)     \307\347
 566    .  (ring)        \305\345"
 567   (interactive "p")
 568   (or count (setq count 1))
 569
 570   (if (not (eq last-command 'self-insert-command))
 571       ;; Only do the magic if the two chars were typed in succession.
 572       (self-insert-command count)
 573
 574     ;; This is so that ``a : C-x u'' will transform `adiaeresis' back into `a:'
 575     (self-insert-command count)
 576     (undo-boundary)
 577     (delete-char (- count))
 578
 579     (let* ((c last-command-char)
 580            (map (cond ((eq c ?') compose-acute-map)
 581                       ((eq c ?`) compose-grave-map)
 582                       ((eq c ?,) compose-cedilla-map)
 583                       ((eq c ?:) compose-diaeresis-map)
 584                       ((eq c ?^) compose-circumflex-map)
 585                       ((eq c ?~) compose-tilde-map)
 586                       ((eq c ?.) compose-ring-map)
 587                       (t (error "unknown diacritic: %s (%c)" c c))))
 588            (base-char (preceding-char))
 589            (mod-char (and (>= (downcase base-char) ?a) ; only do alphabetics?
 590                           (<= (downcase base-char) ?z)
 591                           (lookup-key map (make-string 1 base-char)))))
 592       (if (and (vectorp mod-char) (= (length mod-char) 1))
 593           (setq mod-char (aref mod-char 0)))
 594       (if (and mod-char (symbolp mod-char))
 595           (setq mod-char (or (get mod-char character-set-property) mod-char)))
 596       (if (and mod-char (> count 0))
 597           (delete-char -1)
 598         (setq mod-char c))
 599       (while (> count 0)
 600         (insert mod-char)
 601         (setq count (1- count))))))
 602
 603 ;; should "::" mean "¨" and ": " mean ":"?
 604 ;; should we also do
 605 ;;    (?~
 606 ;;     (?A "\303")
 607 ;;     (?C "\307")
 608 ;;     (?D "\320")
 609 ;;     (?N "\321")
 610 ;;     (?O "\325")
 611 ;;     (?a "\343")
 612 ;;     (?c "\347")
 613 ;;     (?d "\360")
 614 ;;     (?n "\361")
 615 ;;     (?o "\365")
 616 ;;     (?> "\273")
 617 ;;     (?< "\253")
 618 ;;     (?  "~")) ; no special code
 619 ;;    (?\/
 620 ;;     (?A "\305") ;; A-with-ring (Norwegian and Danish)
 621 ;;     (?E "\306") ;; AE-ligature (Norwegian and Danish)
 622 ;;     (?O "\330")
 623 ;;     (?a "\345") ;; a-with-ring (Norwegian and Danish)
 624 ;;     (?e "\346") ;; ae-ligature (Norwegian and Danish)
 625 ;;     (?o "\370")
 626 ;;     (?  "/")) ; no special code
 627
 628 \f
 629 ;;; Providing help in the middle of a compose sequence.  (Way cool.)
 630
 631 (eval-when-compile
 632   (defsubst next-composable-event ()
 633     (let (event)
 634       (while (progn
 635                (setq event (next-command-event))
 636                (not (or (key-press-event-p event)
 637                         (button-press-event-p event))))
 638         (dispatch-event event))
 639       event)))
 640
 641 (defun compose-help (ignore-prompt)
 642   (let* ((keys (apply 'vector (nbutlast (append (this-command-keys) nil))))
 643          (map (or (lookup-key function-key-map keys)
 644                   (error "can't find map?  %s %s" keys (this-command-keys))))
 645          binding)
 646     (save-excursion
 647       (with-output-to-temp-buffer "*Help*"
 648         (set-buffer "*Help*")
 649         (erase-buffer)
 650         (message "Working...")
 651         (setq ctl-arrow 'compose) ; non-t-non-nil
 652         (insert "You are typing a compose sequence.  So far you have typed: ")
 653         (insert (key-description keys))
 654         (insert "\nCompletions from here are:\n\n")
 655         (map-keymap 'compose-help-mapper map t)
 656         (message "? ")))
 657     (while (keymapp map)
 658       (setq binding (lookup-key map (vector (next-composable-event))))
 659       (if (null binding)
 660           (message "No such key in keymap. Try again.")
 661         (setq map binding)))
 662     binding))
 663
 664 (put 'compose-help 'isearch-command t)  ; so that it doesn't terminate isearch
 665
 666 (defun compose-help-mapper (key binding)
 667   (if (and (symbolp key)
 668            (get key character-set-property))
 669       (setq key (get key character-set-property)))
 670   (if (eq binding 'compose-help) ; suppress that...
 671       nil
 672     (if (keymapp binding)
 673         (let ((p (point)))
 674           (map-keymap 'compose-help-mapper binding t)
 675           (goto-char p)
 676           (while (not (eobp))
 677             (if (characterp key)
 678                 (insert (make-string 1 key))
 679               (insert (single-key-description key)))
 680             (insert " ")
 681             (forward-line 1)))
 682       (if (characterp key)
 683           (insert (make-string 1 key))
 684         (insert (single-key-description key)))
 685       (indent-to 16)
 686       (let ((code (and (vectorp binding)
 687                        (= 1 (length binding))
 688                        (get (aref binding 0) character-set-property))))
 689         (if code
 690             (insert (make-string 1 code))
 691           (if (stringp binding)
 692               (insert binding)
 693             (insert (prin1-to-string binding)))))
 694       (when (and (vectorp binding) (= 1 (length binding)))
 695         (indent-to 32)
 696         (insert (symbol-name (aref binding 0)))))
 697     (insert "\n")))
 698
 699 ;; define it at top-level in the compose map...
 700 ;;(define-key compose-map [(control h)] 'compose-help)
 701 ;;(define-key compose-map [help]        'compose-help)
 702 ;; and then define it in each sub-map of the compose map.
 703 (map-keymap
 704  (lambda (key binding)
 705    (when (keymapp binding)
 706 ;;     (define-key binding [(control h)] 'compose-help)
 707 ;;     (define-key binding [help]        'compose-help)
 708      ))
 709  compose-map)
 710
 711 ;; Make redisplay display the accented letters
 712 (if (memq (default-value 'ctl-arrow) '(t nil))
 713     (setq-default ctl-arrow 'iso-8859/1))
 714
 715 \f
 716 (provide 'x-compose)
 717
 718 ;;; x-compose.el ends here