code.delx.au - gnu-emacs/blob - lisp/term/xterm.el

   1 ;;; xterm.el --- define function key sequences and standard colors for xterm  -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 1995, 2001-2016 Free Software Foundation, Inc.
   4
   5 ;; Author: FSF
   6 ;; Keywords: terminals
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (defgroup xterm nil
  28   "XTerm support."
  29   :version "24.1"
  30   :group 'terminals)
  31
  32 (defconst xterm--extra-capabilities-type
  33   ;; NOTE: If you add entries here, make sure to update
  34   ;; `terminal-init-xterm' as well.
  35   '(set (const :tag "modifyOtherKeys support" modifyOtherKeys)
  36         (const :tag "report background" reportBackground)
  37         (const :tag "get X selection" getSelection)
  38         (const :tag "set X selection" setSelection)))
  39
  40 (defcustom xterm-extra-capabilities 'check
  41   "Whether Xterm supports some additional, more modern, features.
  42 If nil, just assume that it does not.
  43 If `check', try to check if it does.
  44 If a list, assume that the listed features are supported, without checking.
  45
  46 The relevant features are:
  47   modifyOtherKeys  -- if supported, more key bindings work (e.g., \"\\C-,\")
  48   reportBackground -- if supported, Xterm reports its background color
  49   getSelection     -- if supported, Xterm yanks text from the X selection
  50   setSelection     -- if supported, Xterm saves killed text to the X selection"
  51   :version "24.1"
  52   :type `(choice (const :tag "Check" check)
  53                  ,xterm--extra-capabilities-type))
  54
  55 (defcustom xterm-max-cut-length 100000
  56   "Maximum number of bytes to cut into xterm using the OSC 52 sequence.
  57
  58 The OSC 52 sequence requires a terminator byte.  Some terminals will ignore or
  59 mistreat a terminated sequence that is longer than a certain size, usually to
  60 protect users from runaway sequences.
  61
  62 This variable allows you to tweak the maximum number of bytes that will be sent
  63 using the OSC 52 sequence.
  64
  65 If you select a region larger than this size, it won't be copied to your system
  66 clipboard.  Since clipboard data is base 64 encoded, the actual number of
  67 string bytes that can be copied is 3/4 of this value."
  68   :version "25.1"
  69   :type 'integer)
  70
  71 (defconst xterm-paste-ending-sequence "\e[201~"
  72   "Characters send by the terminal to end a bracketed paste.")
  73
  74 (defun xterm--pasted-text ()
  75   "Handle the rest of a terminal paste operation.
  76 Return the pasted text as a string."
  77   (let ((end-marker-length (length xterm-paste-ending-sequence)))
  78     (with-temp-buffer
  79       (set-buffer-multibyte nil)
  80       (while (not (search-backward xterm-paste-ending-sequence
  81                                    (- (point) end-marker-length) t))
  82         (let ((event (read-event nil nil
  83                                  ;; Use finite timeout to avoid glomming the
  84                                  ;; event onto this-command-keys.
  85                                  most-positive-fixnum)))
  86           (when (eql event ?\r)
  87             (setf event ?\n))
  88           (insert event)))
  89       (let ((last-coding-system-used))
  90         (decode-coding-region (point-min) (point) (keyboard-coding-system)
  91                               t)))))
  92
  93 (defun xterm-paste ()
  94   "Handle the start of a terminal paste operation."
  95   (interactive)
  96   (let* ((pasted-text (xterm--pasted-text))
  97          (interprogram-paste-function (lambda () pasted-text)))
  98     (yank)))
  99
 100 (define-key global-map [xterm-paste] #'xterm-paste)
 101
 102 (defvar xterm-rxvt-function-map
 103   (let ((map (make-sparse-keymap)))
 104     (define-key map "\e[2~" [insert])
 105     (define-key map "\e[3~" [delete])
 106     (define-key map "\e[4~" [select])
 107     (define-key map "\e[5~" [prior])
 108     (define-key map "\e[6~" [next])
 109
 110     (define-key map "\e[15~" [f5])
 111     (define-key map "\e[17~" [f6])
 112     (define-key map "\e[18~" [f7])
 113     (define-key map "\e[19~" [f8])
 114     (define-key map "\e[20~" [f9])
 115     (define-key map "\e[21~" [f10])
 116
 117     (define-key map "\e[2;2~" [S-insert])
 118
 119     ;; Other versions of xterm might emit these.
 120     (define-key map "\e[A" [up])
 121     (define-key map "\e[B" [down])
 122     (define-key map "\e[C" [right])
 123     (define-key map "\e[D" [left])
 124
 125     (define-key map "\e[11~" [f1])
 126     (define-key map "\e[12~" [f2])
 127     (define-key map "\e[13~" [f3])
 128     (define-key map "\e[14~" [f4])
 129
 130     ;; Recognize the start of a bracketed paste sequence.  The handler
 131     ;; internally recognizes the end.
 132     (define-key map "\e[200~" [xterm-paste])
 133
 134     map)
 135   "Keymap of escape sequences, shared between xterm and rxvt support.")
 136
 137 (defvar xterm-function-map
 138   (let ((map (make-sparse-keymap)))
 139     (set-keymap-parent map xterm-rxvt-function-map)
 140
 141     ;; xterm from X.org 6.8.2 uses these key definitions.
 142     (define-key map "\eOP" [f1])
 143     (define-key map "\eOQ" [f2])
 144     (define-key map "\eOR" [f3])
 145     (define-key map "\eOS" [f4])
 146     (define-key map "\e[23~" [f11])
 147     (define-key map "\e[24~" [f12])
 148
 149     (define-key map "\eO2P" [S-f1])
 150     (define-key map "\eO2Q" [S-f2])
 151     (define-key map "\eO2R" [S-f3])
 152     (define-key map "\eO2S" [S-f4])
 153     (define-key map "\e[1;2P" [S-f1])
 154     (define-key map "\e[1;2Q" [S-f2])
 155     (define-key map "\e[1;2R" [S-f3])
 156     (define-key map "\e[1;2S" [S-f4])
 157     (define-key map "\e[15;2~" [S-f5])
 158     (define-key map "\e[17;2~" [S-f6])
 159     (define-key map "\e[18;2~" [S-f7])
 160     (define-key map "\e[19;2~" [S-f8])
 161     (define-key map "\e[20;2~" [S-f9])
 162     (define-key map "\e[21;2~" [S-f10])
 163     (define-key map "\e[23;2~" [S-f11])
 164     (define-key map "\e[24;2~" [S-f12])
 165
 166     (define-key map "\eO5P" [C-f1])
 167     (define-key map "\eO5Q" [C-f2])
 168     (define-key map "\eO5R" [C-f3])
 169     (define-key map "\eO5S" [C-f4])
 170     (define-key map "\e[15;5~" [C-f5])
 171     (define-key map "\e[17;5~" [C-f6])
 172     (define-key map "\e[18;5~" [C-f7])
 173     (define-key map "\e[19;5~" [C-f8])
 174     (define-key map "\e[20;5~" [C-f9])
 175     (define-key map "\e[21;5~" [C-f10])
 176     (define-key map "\e[23;5~" [C-f11])
 177     (define-key map "\e[24;5~" [C-f12])
 178
 179     (define-key map "\eO6P" [C-S-f1])
 180     (define-key map "\eO6Q" [C-S-f2])
 181     (define-key map "\eO6R" [C-S-f3])
 182     (define-key map "\eO6S" [C-S-f4])
 183     (define-key map "\e[15;6~" [C-S-f5])
 184     (define-key map "\e[17;6~" [C-S-f6])
 185     (define-key map "\e[18;6~" [C-S-f7])
 186     (define-key map "\e[19;6~" [C-S-f8])
 187     (define-key map "\e[20;6~" [C-S-f9])
 188     (define-key map "\e[21;6~" [C-S-f10])
 189     (define-key map "\e[23;6~" [C-S-f11])
 190     (define-key map "\e[24;6~" [C-S-f12])
 191
 192     (define-key map "\eO3P" [M-f1])
 193     (define-key map "\eO3Q" [M-f2])
 194     (define-key map "\eO3R" [M-f3])
 195     (define-key map "\eO3S" [M-f4])
 196     (define-key map "\e[15;3~" [M-f5])
 197     (define-key map "\e[17;3~" [M-f6])
 198     (define-key map "\e[18;3~" [M-f7])
 199     (define-key map "\e[19;3~" [M-f8])
 200     (define-key map "\e[20;3~" [M-f9])
 201     (define-key map "\e[21;3~" [M-f10])
 202     (define-key map "\e[23;3~" [M-f11])
 203     (define-key map "\e[24;3~" [M-f12])
 204
 205     (define-key map "\eO4P" [M-S-f1])
 206     (define-key map "\eO4Q" [M-S-f2])
 207     (define-key map "\eO4R" [M-S-f3])
 208     (define-key map "\eO4S" [M-S-f4])
 209     (define-key map "\e[15;4~" [M-S-f5])
 210     (define-key map "\e[17;4~" [M-S-f6])
 211     (define-key map "\e[18;4~" [M-S-f7])
 212     (define-key map "\e[19;4~" [M-S-f8])
 213     (define-key map "\e[20;4~" [M-S-f9])
 214     (define-key map "\e[21;4~" [M-S-f10])
 215     (define-key map "\e[23;4~" [M-S-f11])
 216     (define-key map "\e[24;4~" [M-S-f12])
 217
 218     (define-key map "\eOA" [up])
 219     (define-key map "\eOB" [down])
 220     (define-key map "\eOC" [right])
 221     (define-key map "\eOD" [left])
 222     (define-key map "\eOF" [end])
 223     (define-key map "\eOH" [home])
 224
 225     (define-key map "\e[1;2A" [S-up])
 226     (define-key map "\e[1;2B" [S-down])
 227     (define-key map "\e[1;2C" [S-right])
 228     (define-key map "\e[1;2D" [S-left])
 229     (define-key map "\e[1;2F" [S-end])
 230     (define-key map "\e[1;2H" [S-home])
 231
 232     (define-key map "\e[1;4A" [M-S-up])
 233     (define-key map "\e[1;4B" [M-S-down])
 234     (define-key map "\e[1;4C" [M-S-right])
 235     (define-key map "\e[1;4D" [M-S-left])
 236     (define-key map "\e[1;4F" [M-S-end])
 237     (define-key map "\e[1;4H" [M-S-home])
 238
 239     (define-key map "\e[1;5A" [C-up])
 240     (define-key map "\e[1;5B" [C-down])
 241     (define-key map "\e[1;5C" [C-right])
 242     (define-key map "\e[1;5D" [C-left])
 243     (define-key map "\e[1;5F" [C-end])
 244     (define-key map "\e[1;5H" [C-home])
 245
 246     (define-key map "\e[1;6A" [C-S-up])
 247     (define-key map "\e[1;6B" [C-S-down])
 248     (define-key map "\e[1;6C" [C-S-right])
 249     (define-key map "\e[1;6D" [C-S-left])
 250     (define-key map "\e[1;6F" [C-S-end])
 251     (define-key map "\e[1;6H" [C-S-home])
 252
 253     (define-key map "\e[1;7A" [C-M-up])
 254     (define-key map "\e[1;7B" [C-M-down])
 255     (define-key map "\e[1;7C" [C-M-right])
 256     (define-key map "\e[1;7D" [C-M-left])
 257     (define-key map "\e[1;7F" [C-M-end])
 258     (define-key map "\e[1;7H" [C-M-home])
 259
 260     (define-key map "\e[1;8A" [C-M-S-up])
 261     (define-key map "\e[1;8B" [C-M-S-down])
 262     (define-key map "\e[1;8C" [C-M-S-right])
 263     (define-key map "\e[1;8D" [C-M-S-left])
 264     (define-key map "\e[1;8F" [C-M-S-end])
 265     (define-key map "\e[1;8H" [C-M-S-home])
 266
 267     (define-key map "\e[1;3A" [M-up])
 268     (define-key map "\e[1;3B" [M-down])
 269     (define-key map "\e[1;3C" [M-right])
 270     (define-key map "\e[1;3D" [M-left])
 271     (define-key map "\e[1;3F" [M-end])
 272     (define-key map "\e[1;3H" [M-home])
 273
 274     (define-key map "\e[3;2~" [S-delete])
 275     (define-key map "\e[5;2~" [S-prior])
 276     (define-key map "\e[6;2~" [S-next])
 277
 278     (define-key map "\e[2;4~" [M-S-insert])
 279     (define-key map "\e[3;4~" [M-S-delete])
 280     (define-key map "\e[5;4~" [M-S-prior])
 281     (define-key map "\e[6;4~" [M-S-next])
 282
 283     (define-key map "\e[2;5~" [C-insert])
 284     (define-key map "\e[3;5~" [C-delete])
 285     (define-key map "\e[5;5~" [C-prior])
 286     (define-key map "\e[6;5~" [C-next])
 287
 288     (define-key map "\e[2;6~" [C-S-insert])
 289     (define-key map "\e[3;6~" [C-S-delete])
 290     (define-key map "\e[5;6~" [C-S-prior])
 291     (define-key map "\e[6;6~" [C-S-next])
 292
 293     (define-key map "\e[2;7~" [C-M-insert])
 294     (define-key map "\e[3;7~" [C-M-delete])
 295     (define-key map "\e[5;7~" [C-M-prior])
 296     (define-key map "\e[6;7~" [C-M-next])
 297
 298     (define-key map "\e[2;8~" [C-M-S-insert])
 299     (define-key map "\e[3;8~" [C-M-S-delete])
 300     (define-key map "\e[5;8~" [C-M-S-prior])
 301     (define-key map "\e[6;8~" [C-M-S-next])
 302
 303     (define-key map "\e[2;3~" [M-insert])
 304     (define-key map "\e[3;3~" [M-delete])
 305     (define-key map "\e[5;3~" [M-prior])
 306     (define-key map "\e[6;3~" [M-next])
 307
 308     (define-key map "\e[29~" [print])
 309
 310     (define-key map "\eOj" [kp-multiply])
 311     (define-key map "\eOk" [kp-add])
 312     (define-key map "\eOl" [kp-separator])
 313     (define-key map "\eOm" [kp-subtract])
 314     (define-key map "\eOo" [kp-divide])
 315     (define-key map "\eOp" [kp-0])
 316     (define-key map "\eOq" [kp-1])
 317     (define-key map "\eOr" [kp-2])
 318     (define-key map "\eOs" [kp-3])
 319     (define-key map "\eOt" [kp-4])
 320     (define-key map "\eOu" [kp-5])
 321     (define-key map "\eOv" [kp-6])
 322     (define-key map "\eOw" [kp-7])
 323     (define-key map "\eOx" [kp-8])
 324     (define-key map "\eOy" [kp-9])
 325
 326     (define-key map "\eO2j" [S-kp-multiply])
 327     (define-key map "\eO2k" [S-kp-add])
 328     (define-key map "\eO2l" [S-kp-separator])
 329     (define-key map "\eO2m" [S-kp-subtract])
 330     (define-key map "\eO2o" [S-kp-divide])
 331     (define-key map "\eO2p" [S-kp-0])
 332     (define-key map "\eO2q" [S-kp-1])
 333     (define-key map "\eO2r" [S-kp-2])
 334     (define-key map "\eO2s" [S-kp-3])
 335     (define-key map "\eO2t" [S-kp-4])
 336     (define-key map "\eO2u" [S-kp-5])
 337     (define-key map "\eO2v" [S-kp-6])
 338     (define-key map "\eO2w" [S-kp-7])
 339     (define-key map "\eO2x" [S-kp-8])
 340     (define-key map "\eO2y" [S-kp-9])
 341
 342     (define-key map "\eO4j" [M-S-kp-multiply])
 343     (define-key map "\eO4k" [M-S-kp-add])
 344     (define-key map "\eO4l" [M-S-kp-separator])
 345     (define-key map "\eO4m" [M-S-kp-subtract])
 346     (define-key map "\eO4o" [M-S-kp-divide])
 347     (define-key map "\eO4p" [M-S-kp-0])
 348     (define-key map "\eO4q" [M-S-kp-1])
 349     (define-key map "\eO4r" [M-S-kp-2])
 350     (define-key map "\eO4s" [M-S-kp-3])
 351     (define-key map "\eO4t" [M-S-kp-4])
 352     (define-key map "\eO4u" [M-S-kp-5])
 353     (define-key map "\eO4v" [M-S-kp-6])
 354     (define-key map "\eO4w" [M-S-kp-7])
 355     (define-key map "\eO4x" [M-S-kp-8])
 356     (define-key map "\eO4y" [M-S-kp-9])
 357
 358     (define-key map "\eO6j" [C-S-kp-multiply])
 359     (define-key map "\eO6k" [C-S-kp-add])
 360     (define-key map "\eO6l" [C-S-kp-separator])
 361     (define-key map "\eO6m" [C-S-kp-subtract])
 362     (define-key map "\eO6o" [C-S-kp-divide])
 363     (define-key map "\eO6p" [C-S-kp-0])
 364     (define-key map "\eO6q" [C-S-kp-1])
 365     (define-key map "\eO6r" [C-S-kp-2])
 366     (define-key map "\eO6s" [C-S-kp-3])
 367     (define-key map "\eO6t" [C-S-kp-4])
 368     (define-key map "\eO6u" [C-S-kp-5])
 369     (define-key map "\eO6v" [C-S-kp-6])
 370     (define-key map "\eO6w" [C-S-kp-7])
 371     (define-key map "\eO6x" [C-S-kp-8])
 372     (define-key map "\eO6y" [C-S-kp-9])
 373
 374     (define-key map "\eO8j" [C-M-S-kp-multiply])
 375     (define-key map "\eO8k" [C-M-S-kp-add])
 376     (define-key map "\eO8l" [C-M-S-kp-separator])
 377     (define-key map "\eO8m" [C-M-S-kp-subtract])
 378     (define-key map "\eO8o" [C-M-S-kp-divide])
 379     (define-key map "\eO8p" [C-M-S-kp-0])
 380     (define-key map "\eO8q" [C-M-S-kp-1])
 381     (define-key map "\eO8r" [C-M-S-kp-2])
 382     (define-key map "\eO8s" [C-M-S-kp-3])
 383     (define-key map "\eO8t" [C-M-S-kp-4])
 384     (define-key map "\eO8u" [C-M-S-kp-5])
 385     (define-key map "\eO8v" [C-M-S-kp-6])
 386     (define-key map "\eO8w" [C-M-S-kp-7])
 387     (define-key map "\eO8x" [C-M-S-kp-8])
 388     (define-key map "\eO8y" [C-M-S-kp-9])
 389
 390     ;; These keys are available in xterm starting from version 216
 391     ;; if the modifyOtherKeys resource is set to 1.
 392     (dolist (bind '((5 9   [C-tab])
 393                     (5 13  [C-return])
 394                     (5 39  [?\C-\'])
 395                     (5 44  [?\C-,])
 396                     (5 45  [?\C--])
 397                     (5 46  [?\C-.])
 398                     (5 47  [?\C-/])
 399                     (5 48  [?\C-0])
 400                     (5 49  [?\C-1])
 401                     ;; Not all C-DIGIT keys have a distinct binding.
 402                     (5 57  [?\C-9])
 403                     (5 59  [?\C-\;])
 404                     (5 61  [?\C-=])
 405                     (5 92  [?\C-\\])
 406
 407                     (6 33  [?\C-!])
 408                     (6 34  [?\C-\"])
 409                     (6 35  [?\C-#])
 410                     (6 36  [?\C-$])
 411                     (6 37  [?\C-%])
 412                     (6 38  [?\C-&])
 413                     (6 40  [?\C-\(])
 414                     (6 41  [?\C-\)])
 415                     (6 42  [?\C-*])
 416                     (6 43  [?\C-+])
 417                     (6 58  [?\C-:])
 418                     (6 60  [?\C-<])
 419                     (6 62  [?\C->])
 420                     (6 63  [(control ??)])
 421
 422                     ;; These are the strings emitted for various C-M-
 423                     ;; combinations for keyboards whose Meta and Alt
 424                     ;; modifiers are on the same key (usually labeled "Alt").
 425                     (13 9  [C-M-tab])
 426                     (13 13 [C-M-return])
 427
 428                     (13 39 [?\C-\M-\'])
 429                     (13 44 [?\C-\M-,])
 430                     (13 45 [?\C-\M--])
 431                     (13 46 [?\C-\M-.])
 432                     (13 47 [?\C-\M-/])
 433                     (13 48 [?\C-\M-0])
 434                     (13 49 [?\C-\M-1])
 435                     (13 50 [?\C-\M-2])
 436                     (13 51 [?\C-\M-3])
 437                     (13 52 [?\C-\M-4])
 438                     (13 53 [?\C-\M-5])
 439                     (13 54 [?\C-\M-6])
 440                     (13 55 [?\C-\M-7])
 441                     (13 56 [?\C-\M-8])
 442                     (13 57 [?\C-\M-9])
 443                     (13 59 [?\C-\M-\;])
 444                     (13 61 [?\C-\M-=])
 445                     (13 92 [?\C-\M-\\])
 446
 447                     (14 33  [?\C-\M-!])
 448                     (14 34  [?\C-\M-\"])
 449                     (14 35  [?\C-\M-#])
 450                     (14 36  [?\C-\M-$])
 451                     (14 37  [?\C-\M-%])
 452                     (14 38  [?\C-\M-&])
 453                     (14 40  [?\C-\M-\(])
 454                     (14 41  [?\C-\M-\)])
 455                     (14 42  [?\C-\M-*])
 456                     (14 43  [?\C-\M-+])
 457                     (14 58  [?\C-\M-:])
 458                     (14 60  [?\C-\M-<])
 459                     (14 62  [?\C-\M->])
 460                     (14 63  [(control meta ??)])
 461
 462                     (7 9  [C-M-tab])
 463                     (7 13 [C-M-return])
 464
 465                     (7 32 [?\C-\M-\s])
 466                     (7 39 [?\C-\M-\'])
 467                     (7 44 [?\C-\M-,])
 468                     (7 45 [?\C-\M--])
 469                     (7 46 [?\C-\M-.])
 470                     (7 47 [?\C-\M-/])
 471                     (7 48 [?\C-\M-0])
 472                     (7 49 [?\C-\M-1])
 473                     (7 50 [?\C-\M-2])
 474                     (7 51 [?\C-\M-3])
 475                     (7 52 [?\C-\M-4])
 476                     (7 53 [?\C-\M-5])
 477                     (7 54 [?\C-\M-6])
 478                     (7 55 [?\C-\M-7])
 479                     (7 56 [?\C-\M-8])
 480                     (7 57 [?\C-\M-9])
 481                     (7 59 [?\C-\M-\;])
 482                     (7 61 [?\C-\M-=])
 483                     (7 92 [?\C-\M-\\])
 484
 485                     (8 33  [?\C-\M-!])
 486                     (8 34  [?\C-\M-\"])
 487                     (8 35  [?\C-\M-#])
 488                     (8 36  [?\C-\M-$])
 489                     (8 37  [?\C-\M-%])
 490                     (8 38  [?\C-\M-&])
 491                     (8 40  [?\C-\M-\(])
 492                     (8 41  [?\C-\M-\)])
 493                     (8 42  [?\C-\M-*])
 494                     (8 43  [?\C-\M-+])
 495                     (8 58  [?\C-\M-:])
 496                     (8 60  [?\C-\M-<])
 497                     (8 62  [?\C-\M->])
 498                     (8 63  [(control meta ??)])
 499
 500                     (2 9   [S-tab])
 501                     (2 13  [S-return])
 502
 503                     (6 9   [C-S-tab])
 504                     (6 13  [C-S-return])))
 505       (define-key map
 506         (format "\e[27;%d;%d~" (nth 0 bind) (nth 1 bind)) (nth 2 bind))
 507       ;; For formatOtherKeys=1, the sequence is a bit shorter (bug#13839).
 508       (define-key map
 509         (format "\e[%d;%du" (nth 1 bind) (nth 0 bind)) (nth 2 bind)))
 510
 511     ;; Other versions of xterm might emit these.
 512     (define-key map "\e[1~" [home])
 513
 514     (define-key map "\eO2A" [S-up])
 515     (define-key map "\eO2B" [S-down])
 516     (define-key map "\eO2C" [S-right])
 517     (define-key map "\eO2D" [S-left])
 518     (define-key map "\eO2F" [S-end])
 519     (define-key map "\eO2H" [S-home])
 520
 521     (define-key map "\eO5A" [C-up])
 522     (define-key map "\eO5B" [C-down])
 523     (define-key map "\eO5C" [C-right])
 524     (define-key map "\eO5D" [C-left])
 525     (define-key map "\eO5F" [C-end])
 526     (define-key map "\eO5H" [C-home])
 527
 528     map)
 529   "Function key map overrides for xterm.")
 530
 531 (defvar xterm-alternatives-map
 532   (let ((map (make-sparse-keymap)))
 533     ;; The terminal initialization C code file might have initialized
 534     ;; function keys F13->F60 from the termcap/terminfo information.
 535     ;; On a PC-style keyboard these keys correspond to
 536     ;; MODIFIER-FUNCTION_KEY, where modifier is S-, C, A-, C-S-.  The code
 537     ;; here substitutes the corresponding definitions in function-key-map.
 538     ;; The mapping from escape sequences to Fn is done in input-decode-map
 539     ;; whereas this here mapping is done in local-function-key-map so that
 540     ;; bindings to f45 still work, in case your keyboard really has an f45
 541     ;; key rather than C-S-f9.
 542     (define-key map [f13] [S-f1])
 543     (define-key map [f14] [S-f2])
 544     (define-key map [f15] [S-f3])
 545     (define-key map [f16] [S-f4])
 546     (define-key map [f17] [S-f5])
 547     (define-key map [f18] [S-f6])
 548     (define-key map [f19] [S-f7])
 549     (define-key map [f20] [S-f8])
 550     (define-key map [f21] [S-f9])
 551     (define-key map [f22] [S-f10])
 552     (define-key map [f23] [S-f11])
 553     (define-key map [f24] [S-f12])
 554
 555     (define-key map [f25] [C-f1])
 556     (define-key map [f26] [C-f2])
 557     (define-key map [f27] [C-f3])
 558     (define-key map [f28] [C-f4])
 559     (define-key map [f29] [C-f5])
 560     (define-key map [f30] [C-f6])
 561     (define-key map [f31] [C-f7])
 562     (define-key map [f32] [C-f8])
 563     (define-key map [f33] [C-f9])
 564     (define-key map [f34] [C-f10])
 565     (define-key map [f35] [C-f11])
 566     (define-key map [f36] [C-f12])
 567
 568     (define-key map [f37] [C-S-f1])
 569     (define-key map [f38] [C-S-f2])
 570     (define-key map [f39] [C-S-f3])
 571     (define-key map [f40] [C-S-f4])
 572     (define-key map [f41] [C-S-f5])
 573     (define-key map [f42] [C-S-f6])
 574     (define-key map [f43] [C-S-f7])
 575     (define-key map [f44] [C-S-f8])
 576     (define-key map [f45] [C-S-f9])
 577     (define-key map [f46] [C-S-f10])
 578     (define-key map [f47] [C-S-f11])
 579     (define-key map [f48] [C-S-f12])
 580
 581     (define-key map [f49] [M-f1])
 582     (define-key map [f50] [M-f2])
 583     (define-key map [f51] [M-f3])
 584     (define-key map [f52] [M-f4])
 585     (define-key map [f53] [M-f5])
 586     (define-key map [f54] [M-f6])
 587     (define-key map [f55] [M-f7])
 588     (define-key map [f56] [M-f8])
 589     (define-key map [f57] [M-f9])
 590     (define-key map [f58] [M-f10])
 591     (define-key map [f59] [M-f11])
 592     (define-key map [f60] [M-f12])
 593
 594     (define-key map [f61] [M-S-f1])
 595     (define-key map [f62] [M-S-f2])
 596     (define-key map [f63] [M-S-f3])
 597     (define-key map [f64] [M-S-f4])
 598     (define-key map [f65] [M-S-f5])
 599     (define-key map [f66] [M-S-f6])
 600     (define-key map [f67] [M-S-f7])
 601     (define-key map [f68] [M-S-f8])
 602     (define-key map [f69] [M-S-f9])
 603     (define-key map [f70] [M-S-f10])
 604     (define-key map [f71] [M-S-f11])
 605     (define-key map [f72] [M-S-f12])
 606
 607     map)
 608   "Keymap of possible alternative meanings for some keys.")
 609
 610 ;; Set up colors, for those versions of xterm that support it.
 611 (defvar xterm-standard-colors
 612   ;; The names in the comments taken from XTerm-col.ad in the xterm
 613   ;; distribution, see ftp://dickey.his.com/xterm/.  RGB values are
 614   ;; from rgb.txt.
 615   '(("black"          0 (  0   0   0))  ; black
 616     ("red"            1 (205   0   0))  ; red3
 617     ("green"          2 (  0 205   0))  ; green3
 618     ("yellow"         3 (205 205   0))  ; yellow3
 619     ("blue"           4 (  0   0 238))  ; blue2
 620     ("magenta"        5 (205   0 205))  ; magenta3
 621     ("cyan"           6 (  0 205 205))  ; cyan3
 622     ("white"          7 (229 229 229))  ; gray90
 623     ("brightblack"    8 (127 127 127))  ; gray50
 624     ("brightred"      9 (255   0   0))  ; red
 625     ("brightgreen"   10 (  0 255   0))  ; green
 626     ("brightyellow"  11 (255 255   0))  ; yellow
 627     ("brightblue"    12 (92   92 255))  ; rgb:5c/5c/ff
 628     ("brightmagenta" 13 (255   0 255))  ; magenta
 629     ("brightcyan"    14 (  0 255 255))  ; cyan
 630     ("brightwhite"   15 (255 255 255))) ; white
 631   "Names of 16 standard xterm/aixterm colors, their numbers, and RGB values.")
 632
 633 (defun xterm--report-background-handler ()
 634   (let ((str "")
 635         chr)
 636     ;; The reply should be: \e ] 11 ; rgb: NUMBER1 / NUMBER2 / NUMBER3 \e \\
 637     (while (and (setq chr (read-event nil nil 2)) (not (equal chr ?\\)))
 638       (setq str (concat str (string chr))))
 639     (when (string-match
 640            "rgb:\\([a-f0-9]+\\)/\\([a-f0-9]+\\)/\\([a-f0-9]+\\)" str)
 641       (let ((recompute-faces
 642              (xterm-maybe-set-dark-background-mode
 643               (string-to-number (match-string 1 str) 16)
 644               (string-to-number (match-string 2 str) 16)
 645               (string-to-number (match-string 3 str) 16))))
 646
 647         ;; Recompute faces here in case the background mode was
 648         ;; set to dark.  We used to call
 649         ;; `tty-set-up-initial-frame-faces' only once, but that
 650         ;; caused the light background faces to be computed
 651         ;; incorrectly.  See:
 652         ;; http://permalink.gmane.org/gmane.emacs.devel/119627
 653         (when recompute-faces
 654           (tty-set-up-initial-frame-faces))))))
 655
 656 (defun xterm--version-handler ()
 657   (let ((str "")
 658         chr)
 659     ;; The reply should be: \e [ > NUMBER1 ; NUMBER2 ; NUMBER3 c
 660     ;; If the timeout is completely removed for read-event, this
 661     ;; might hang for terminals that pretend to be xterm, but don't
 662     ;; respond to this escape sequence.  RMS' opinion was to remove
 663     ;; it completely.  That might be right, but let's first try to
 664     ;; see if by using a longer timeout we get rid of most issues.
 665     (while (and (setq chr (read-event nil nil 2)) (not (equal chr ?c)))
 666       (setq str (concat str (string chr))))
 667     ;; Since xterm-280, the terminal type (NUMBER1) is now 41 instead of 0.
 668     (when (string-match "\\([0-9]+\\);\\([0-9]+\\);0" str)
 669       (let ((version (string-to-number (match-string 2 str))))
 670         (when (and (> version 2000) (equal (match-string 1 str) "1"))
 671           ;; Hack attack!  bug#16988: gnome-terminal reports "1;NNNN;0"
 672           ;; with a large NNNN but is based on a rather old xterm code.
 673           ;; Gnome terminal 3.6.1 reports 1;3406;0
 674           ;; Gnome terminal 2.32.1 reports 1;2802;0
 675           (setq version 200))
 676         (when (equal (match-string 1 str) "83")
 677           ;; `screen' (which returns 83;40003;0) seems to also lack support for
 678           ;; some of these (bug#17607, bug#20356).
 679           ;; Note: this code path should normally not be used any more
 680           ;; since term/screen.el now binds xterm-extra-capabilities
 681           ;; to a fixed value, rather than using the dynamic checking.
 682           (setq version 200))
 683         ;; If version is 242 or higher, assume the xterm supports
 684         ;; reporting the background color (TODO: maybe earlier
 685         ;; versions do too...)
 686         (when (>= version 242)
 687           (xterm--query "\e]11;?\e\\"
 688                         '(("\e]11;" .  xterm--report-background-handler))))
 689
 690         ;; If version is 216 (the version when modifyOtherKeys was
 691         ;; introduced) or higher, initialize the
 692         ;; modifyOtherKeys support.
 693         (when (>= version 216)
 694           (xterm--init-modify-other-keys))
 695         ;; In version 203 support for accessing the X selection was
 696         ;; added.  Hterm reports itself as version 256 and supports it
 697         ;; as well.  gnome-terminal doesn't and is excluded by this
 698         ;; test.
 699         (when (>= version 203)
 700           ;; Most xterms seem to have it disabled by default, and if it's
 701           ;; disabled, C-y will incur a timeout, so we only use it if the user
 702           ;; explicitly requests it.
 703           ;;(xterm--init-activate-get-selection)
 704           (xterm--init-activate-set-selection))))))
 705
 706 (defvar xterm-query-timeout 2
 707   "Seconds to wait for an answer from the terminal.
 708 Can be nil to mean \"no timeout\".")
 709
 710 (defun xterm--query (query handlers &optional no-async)
 711   "Send QUERY string to the terminal and watch for a response.
 712 HANDLERS is an alist with elements of the form (STRING . FUNCTION).
 713 We run the first FUNCTION whose STRING matches the input events."
 714   ;; We used to query synchronously, but the need to use `discard-input' is
 715   ;; rather annoying (bug#6758).  Maybe we could always use the asynchronous
 716   ;; approach, but it's less tested.
 717   ;; FIXME: Merge the two branches.
 718   (let ((register
 719          (lambda (handlers)
 720            (dolist (handler handlers)
 721              (define-key input-decode-map (car handler)
 722                (lambda (&optional _prompt)
 723                  ;; Unregister the handler, since we don't expect
 724                  ;; further answers.
 725                  (dolist (handler handlers)
 726                    (define-key input-decode-map (car handler) nil))
 727                  (funcall (cdr handler))
 728                  []))))))
 729     (if (and (or (null xterm-query-timeout) (input-pending-p))
 730              (not no-async))
 731         (progn
 732           (funcall register handlers)
 733           (send-string-to-terminal query))
 734       ;; Pending input can be mistakenly returned by the calls to
 735       ;; read-event below: discard it.
 736       (discard-input)
 737       (send-string-to-terminal query)
 738       (while handlers
 739         (let ((handler (pop handlers))
 740               (i 0))
 741           (while (and (< i (length (car handler)))
 742                       (let ((evt (read-event nil nil xterm-query-timeout)))
 743                         (if (and (null evt) (= i 0) (not no-async))
 744                             ;; Timeout on the first event: fallback on async.
 745                             (progn
 746                               (funcall register (cons handler handlers))
 747                               (setq handlers nil)
 748                               nil)
 749                           (or (eq evt (aref (car handler) i))
 750                               (progn (if evt (push evt unread-command-events))
 751                                      nil)))))
 752             (setq i (1+ i)))
 753           (if (= i (length (car handler)))
 754               (progn (setq handlers nil)
 755                      (funcall (cdr handler)))
 756             (while (> i 0)
 757               (push (aref (car handler) (setq i (1- i)))
 758                     unread-command-events))))))))
 759
 760 (defun xterm--push-map (map basemap)
 761   ;; Use inheritance to let the main keymaps override those defaults.
 762   ;; This way we don't override terminfo-derived settings or settings
 763   ;; made in the init file.
 764   (set-keymap-parent
 765    basemap
 766    (make-composed-keymap map (keymap-parent basemap))))
 767
 768 (defun terminal-init-xterm ()
 769   "Terminal initialization function for xterm."
 770   ;; rxvt terminals sometimes set the TERM variable to "xterm", but
 771   ;; rxvt's keybindings are incompatible with xterm's. It is
 772   ;; better in that case to use rxvt's initialization function.
 773   (if (and (getenv "COLORTERM" (selected-frame))
 774            (string-match "\\`rxvt" (getenv "COLORTERM" (selected-frame))))
 775       (tty-run-terminal-initialization (selected-frame) "rxvt")
 776
 777       (xterm--push-map xterm-alternatives-map local-function-key-map)
 778       (xterm--push-map xterm-function-map     input-decode-map))
 779
 780   (xterm-register-default-colors xterm-standard-colors)
 781   (tty-set-up-initial-frame-faces)
 782
 783   (if (eq xterm-extra-capabilities 'check)
 784       ;; Try to find out the type of terminal by sending a "Secondary
 785       ;; Device Attributes (DA)" query.
 786       (xterm--query "\e[>0c"
 787                     ;; Some terminals (like OS X's Terminal.app) respond to
 788                     ;; this query as if it were a "Primary Device Attributes"
 789                     ;; query instead, so we should handle that too.
 790                     '(("\e[?" . xterm--version-handler)
 791                       ("\e[>" . xterm--version-handler)))
 792
 793     (when (memq 'reportBackground xterm-extra-capabilities)
 794       (xterm--query "\e]11;?\e\\"
 795                     '(("\e]11;" .  xterm--report-background-handler))))
 796
 797     (when (memq 'modifyOtherKeys xterm-extra-capabilities)
 798       (xterm--init-modify-other-keys))
 799
 800     (when (memq 'getSelection xterm-extra-capabilities)
 801       (xterm--init-activate-get-selection))
 802     (when (memq 'setSelection xterm-extra-capabilities)
 803       (xterm--init-activate-set-selection)))
 804
 805   ;; Unconditionally enable bracketed paste mode: terminals that don't
 806   ;; support it just ignore the sequence.
 807   (xterm--init-bracketed-paste-mode)
 808
 809   (run-hooks 'terminal-init-xterm-hook))
 810
 811 (defun xterm--init-modify-other-keys ()
 812   "Terminal initialization for xterm's modifyOtherKeys support."
 813   (send-string-to-terminal "\e[>4;1m")
 814   (push "\e[>4m" (terminal-parameter nil 'tty-mode-reset-strings))
 815   (push "\e[>4;1m" (terminal-parameter nil 'tty-mode-set-strings)))
 816
 817 (defun xterm--init-bracketed-paste-mode ()
 818   "Terminal initialization for bracketed paste mode."
 819   (send-string-to-terminal "\e[?2004h")
 820   (push "\e[?2004l" (terminal-parameter nil 'tty-mode-reset-strings))
 821   (push "\e[?2004h" (terminal-parameter nil 'tty-mode-set-strings)))
 822
 823 (defun xterm--init-activate-get-selection ()
 824   "Terminal initialization for `gui-get-selection'."
 825   (set-terminal-parameter nil 'xterm--get-selection t))
 826
 827 (defun xterm--init-activate-set-selection ()
 828   "Terminal initialization for `gui-set-selection'."
 829   (set-terminal-parameter nil 'xterm--set-selection t))
 830
 831 (defun xterm--selection-char (type)
 832   (pcase type
 833     ('PRIMARY "p")
 834     ('CLIPBOARD "c")
 835     (_ (error "Invalid selection type: %S" type))))
 836
 837 (cl-defmethod gui-backend-get-selection
 838     (type data-type
 839      &context (window-system nil)
 840               ;; Only applies to terminals which have it enabled.
 841               ((terminal-parameter nil 'xterm--get-selection) (eql t)))
 842   (unless (eq data-type 'STRING)
 843     (error "Unsupported data type %S" data-type))
 844   (let* ((screen (eq (terminal-parameter nil 'terminal-initted)
 845                      'terminal-init-screen))
 846          (query (concat "\e]52;" (xterm--selection-char type) ";")))
 847     (with-temp-buffer
 848       (set-buffer-multibyte nil)
 849       (xterm--query
 850        (concat (when screen "\eP") query "?\a" (when screen "\e\\"))
 851        (list (cons query (lambda ()
 852                            (while (let ((char (read-char)))
 853                                     (unless (eq char ?\a)
 854                                       (insert char)
 855                                       t))))))
 856        'no-async)
 857       (base64-decode-region (point-min) (point-max))
 858       (decode-coding-region (point-min) (point-max) 'utf-8-unix t))))
 859
 860 (cl-defmethod gui-backend-set-selection
 861     (type data
 862      &context (window-system nil)
 863               ;; Only applies to terminals which have it enabled.
 864               ((terminal-parameter nil 'xterm--set-selection) (eql t)))
 865   "Copy DATA to the X selection using the OSC 52 escape sequence.
 866
 867 TYPE specifies which selection to set; it must be either
 868 `PRIMARY' or `CLIPBOARD'.  DATA must be a string.
 869
 870 This can be used as a `gui-set-selection' method for
 871 xterm-compatible terminal emulators.  Then your system clipboard
 872 will be updated whenever you copy a region of text in Emacs.
 873
 874 If the resulting OSC 52 sequence would be longer than
 875 `xterm-max-cut-length', then the TEXT is not sent to the system
 876 clipboard.
 877
 878 This function either sends a raw OSC 52 sequence or wraps the OSC
 879 52 in a Device Control String sequence.  This way, it will work
 880 on a bare terminal emulators as well as inside the screen
 881 program.  When inside the screen program, this function also
 882 chops long DCS sequences into multiple smaller ones to avoid
 883 hitting screen's max DCS length."
 884   (let* ((screen (eq (terminal-parameter nil 'terminal-initted)
 885                      'terminal-init-screen))
 886          (bytes (encode-coding-string data 'utf-8-unix))
 887          (base-64 (if screen
 888                       (replace-regexp-in-string
 889                        "\n" "\e\\\eP"
 890                        (base64-encode-string bytes)
 891                        :fixedcase :literal)
 892                     (base64-encode-string bytes :no-line-break)))
 893          (length (length base-64)))
 894     (if (> length xterm-max-cut-length)
 895         (progn
 896           (warn "Selection too long to send to terminal: %d bytes" length)
 897           (sit-for 2))
 898       (send-string-to-terminal
 899        (concat
 900         (when screen "\eP")
 901         "\e]52;" (xterm--selection-char type) ";" base-64 "\a"
 902         (when screen "\e\\"))))))
 903
 904 (defun xterm-rgb-convert-to-16bit (prim)
 905   "Convert an 8-bit primary color value PRIM to a corresponding 16-bit value."
 906   (logior prim (lsh prim 8)))
 907
 908 (defun xterm-register-default-colors (colors)
 909   "Register the default set of colors for xterm or compatible emulator.
 910
 911 This function registers the number of colors returned by `display-color-cells'
 912 for the currently selected frame.  The first (16) colors are taken from
 913 COLORS, which see, while the rest are computed assuming
 914 either the 88- or 256-color standard color scheme supported by latest
 915 versions of xterm."
 916   (let* ((ncolors (display-color-cells))
 917          (color (car colors)))
 918     (if (> ncolors 0)
 919         ;; Clear the 8 default tty colors registered by startup.el
 920         (tty-color-clear))
 921     ;; Only register as many colors as are supported by the display.
 922     (while (and (> ncolors 0) colors)
 923       (tty-color-define (car color) (cadr color)
 924                         (mapcar #'xterm-rgb-convert-to-16bit
 925                                 (car (cddr color))))
 926       (setq colors (cdr colors)
 927             color (car colors)
 928             ncolors (1- ncolors)))
 929     ;; We've exhausted the colors from `colors'.  If there
 930     ;; are more colors to support, compute them now.
 931     (when (> ncolors 0)
 932       (cond
 933        ((= ncolors 240) ; 256-color xterm
 934         ;; 216 non-gray colors first
 935         (let ((r 0) (g 0) (b 0))
 936           (while (> ncolors 24)
 937             ;; This and other formulas taken from 256colres.pl and
 938             ;; 88colres.pl in the xterm distribution.
 939             (tty-color-define (format "color-%d" (- 256 ncolors))
 940                               (- 256 ncolors)
 941                               (mapcar #'xterm-rgb-convert-to-16bit
 942                                       (list (if (zerop r) 0 (+ (* r 40) 55))
 943                                             (if (zerop g) 0 (+ (* g 40) 55))
 944                                             (if (zerop b) 0 (+ (* b 40) 55)))))
 945
 946             (setq b (1+ b))
 947             (if (> b 5)
 948                 (setq g (1+ g)
 949                       b 0))
 950             (if (> g 5)
 951                 (setq r (1+ r)
 952                       g 0))
 953             (setq ncolors (1- ncolors))))
 954         ;; Now the 24 gray colors
 955         (while (> ncolors 0)
 956           (setq color (xterm-rgb-convert-to-16bit (+ 8 (* (- 24 ncolors) 10))))
 957           (tty-color-define (format "color-%d" (- 256 ncolors))
 958                             (- 256 ncolors)
 959                             (list color color color))
 960           (setq ncolors (1- ncolors))))
 961        ((= ncolors 72)  ; 88-color xterm
 962         ;; 64 non-gray colors
 963         (let ((levels '(0 139 205 255))
 964               (r 0) (g 0) (b 0))
 965           (while (> ncolors 8)
 966             (tty-color-define (format "color-%d" (- 88 ncolors))
 967                               (- 88 ncolors)
 968                               (mapcar #'xterm-rgb-convert-to-16bit
 969                                       (list (nth r levels)
 970                                             (nth g levels)
 971                                             (nth b levels))))
 972             (setq b (1+ b))
 973             (if (> b 3)
 974                 (setq g (1+ g)
 975                       b 0))
 976             (if (> g 3)
 977                 (setq r (1+ r)
 978                       g 0))
 979             (setq ncolors (1- ncolors))))
 980         ;; Now the 8 gray colors
 981         (while (> ncolors 0)
 982           (setq color (xterm-rgb-convert-to-16bit
 983                        (floor
 984                         (if (= ncolors 8)
 985                             46.36363636
 986                           (+ (* (- 8 ncolors) 23.18181818) 69.54545454)))))
 987           (tty-color-define (format "color-%d" (- 88 ncolors))
 988                             (- 88 ncolors)
 989                             (list color color color))
 990           (setq ncolors (1- ncolors))))
 991        (t (error "Unsupported number of xterm colors (%d)" (+ 16 ncolors)))))
 992     ;; Modifying color mappings means realized faces don't use the
 993     ;; right colors, so clear them.
 994     (clear-face-cache)))
 995
 996 (defun xterm-maybe-set-dark-background-mode (redc greenc bluec)
 997   ;; Use the heuristic in `frame-set-background-mode' to decide if a
 998   ;; frame is dark.
 999   (when (< (+ redc greenc bluec) (* .6 (+ 65535 65535 65535)))
1000     (set-terminal-parameter nil 'background-mode 'dark)
1001     t))
1002
1003 (provide 'xterm)                        ;Backward compatibility.
1004 (provide 'term/xterm)
1005 ;;; xterm.el ends here