| 1 | ;;; terminal.el --- terminal emulator for GNU Emacs |
| 2 | |
| 3 | ;; Copyright (C) 1986-1989, 1993-1994, 2001-2012 |
| 4 | ;; Free Software Foundation, Inc. |
| 5 | |
| 6 | ;; Author: Richard Mlynarik <mly@eddie.mit.edu> |
| 7 | ;; Maintainer: FSF |
| 8 | ;; Keywords: comm, terminals |
| 9 | |
| 10 | ;; This file is part of GNU Emacs. |
| 11 | |
| 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 13 | ;; it under the terms of the GNU General Public License as published by |
| 14 | ;; the Free Software Foundation, either version 3 of the License, or |
| 15 | ;; (at your option) any later version. |
| 16 | |
| 17 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | ;; GNU General Public License for more details. |
| 21 | |
| 22 | ;; You should have received a copy of the GNU General Public License |
| 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| 24 | |
| 25 | ;;; Commentary: |
| 26 | |
| 27 | ;;; This file has been censored by the Communications Decency Act. |
| 28 | ;;; That law was passed under the guise of a ban on pornography, but |
| 29 | ;;; it bans far more than that. This file did not contain pornography, |
| 30 | ;;; but it was censored nonetheless. |
| 31 | |
| 32 | ;;; For information on US government censorship of the Internet, and |
| 33 | ;;; what you can do to bring back freedom of the press, see the web |
| 34 | ;;; site http://www.vtw.org/ |
| 35 | |
| 36 | ;;; Code: |
| 37 | |
| 38 | ;;>>TODO |
| 39 | ;;>> ** Nothing can be done about emacs' meta-lossage ** |
| 40 | ;;>> (without redoing keymaps `sanely' -- ask Mly for details) |
| 41 | |
| 42 | ;;>> One probably wants to do setenv MORE -c when running with |
| 43 | ;;>> more-processing enabled. |
| 44 | |
| 45 | (require 'ehelp) |
| 46 | |
| 47 | (defgroup terminal nil |
| 48 | "Terminal emulator for Emacs." |
| 49 | :group 'terminals) |
| 50 | |
| 51 | |
| 52 | (defcustom terminal-escape-char ?\C-^ |
| 53 | "All characters except for this are passed verbatim through the |
| 54 | terminal-emulator. This character acts as a prefix for commands |
| 55 | to the emulator program itself. Type this character twice to send |
| 56 | it through the emulator. Type ? after typing it for a list of |
| 57 | possible commands. |
| 58 | This variable is local to each terminal-emulator buffer." |
| 59 | :type 'character |
| 60 | :group 'terminal) |
| 61 | |
| 62 | (defcustom terminal-scrolling t ;;>> Setting this to t sort-of defeats my whole aim in writing this package... |
| 63 | "If non-nil, the terminal-emulator will losingly `scroll' when output occurs |
| 64 | past the bottom of the screen. If nil, output will win and `wrap' to the top |
| 65 | of the screen. |
| 66 | This variable is local to each terminal-emulator buffer." |
| 67 | :type 'boolean |
| 68 | :group 'terminal) |
| 69 | |
| 70 | (defcustom terminal-more-processing t |
| 71 | "If non-nil, do more-processing. |
| 72 | This variable is local to each terminal-emulator buffer." |
| 73 | :type 'boolean |
| 74 | :group 'terminal) |
| 75 | |
| 76 | ;; If you are the sort of loser who uses scrolling without more breaks |
| 77 | ;; and expects to actually see anything, you should probably set this to |
| 78 | ;; around 400 |
| 79 | (defcustom terminal-redisplay-interval 5000 |
| 80 | "Maximum number of characters which will be processed by the |
| 81 | terminal-emulator before a screen redisplay is forced. |
| 82 | Set this to a large value for greater throughput, |
| 83 | set it smaller for more frequent updates but overall slower |
| 84 | performance." |
| 85 | :type 'integer |
| 86 | :group 'terminal) |
| 87 | |
| 88 | (defvar terminal-more-break-insertion |
| 89 | "*** More break -- Press space to continue ***") |
| 90 | |
| 91 | (defvar terminal-meta-map nil) |
| 92 | (if terminal-meta-map |
| 93 | nil |
| 94 | (let ((map (make-sparse-keymap))) |
| 95 | (define-key map [t] 'te-pass-through) |
| 96 | (setq terminal-meta-map map))) |
| 97 | |
| 98 | (defvar terminal-map nil) |
| 99 | (if terminal-map |
| 100 | nil |
| 101 | (let ((map (make-sparse-keymap))) |
| 102 | ;; Prevent defining [menu-bar] as te-pass-through |
| 103 | ;; so we allow the global menu bar to be visible. |
| 104 | (define-key map [menu-bar] (make-sparse-keymap)) |
| 105 | (define-key map [t] 'te-pass-through) |
| 106 | (define-key map [switch-frame] 'handle-switch-frame) |
| 107 | (define-key map "\e" terminal-meta-map) |
| 108 | ;;(define-key map "\C-l" |
| 109 | ;; (lambda () (interactive) (te-pass-through) (redraw-display))) |
| 110 | (setq terminal-map map))) |
| 111 | |
| 112 | (defvar terminal-escape-map nil) |
| 113 | (if terminal-escape-map |
| 114 | nil |
| 115 | (let ((map (make-sparse-keymap))) |
| 116 | (define-key map [t] 'undefined) |
| 117 | (let ((s "0")) |
| 118 | (while (<= (aref s 0) ?9) |
| 119 | (define-key map s 'digit-argument) |
| 120 | (aset s 0 (1+ (aref s 0))))) |
| 121 | (define-key map "b" 'switch-to-buffer) |
| 122 | (define-key map "o" 'other-window) |
| 123 | (define-key map "e" 'te-set-escape-char) |
| 124 | (define-key map "\C-l" 'redraw-display) |
| 125 | (define-key map "\C-o" 'te-flush-pending-output) |
| 126 | (define-key map "m" 'te-toggle-more-processing) |
| 127 | (define-key map "x" 'te-escape-extended-command) |
| 128 | ;;>> What use is this? Why is it in the default terminal-emulator map? |
| 129 | (define-key map "w" 'te-edit) |
| 130 | (define-key map "?" 'te-escape-help) |
| 131 | (define-key map (char-to-string help-char) 'te-escape-help) |
| 132 | (setq terminal-escape-map map))) |
| 133 | |
| 134 | (defvar te-escape-command-alist nil) |
| 135 | (if te-escape-command-alist |
| 136 | nil |
| 137 | (setq te-escape-command-alist |
| 138 | '(("Set Escape Character" . te-set-escape-char) |
| 139 | ;;>> What use is this? Why is it in the default terminal-emulator map? |
| 140 | ("Edit" . te-edit) |
| 141 | ("Refresh" . redraw-display) |
| 142 | ("Record Output" . te-set-output-log) |
| 143 | ("Photo" . te-set-output-log) |
| 144 | ("Tofu" . te-tofu) ;; confuse the uninitiated |
| 145 | ("Stuff Input" . te-stuff-string) |
| 146 | ("Flush Pending Output" . te-flush-pending-output) |
| 147 | ("Enable More Processing" . te-enable-more-processing) |
| 148 | ("Disable More Processing" . te-disable-more-processing) |
| 149 | ("Scroll at end of page" . te-do-scrolling) |
| 150 | ("Wrap at end of page" . te-do-wrapping) |
| 151 | ("Switch To Buffer" . switch-to-buffer) |
| 152 | ("Other Window" . other-window) |
| 153 | ("Kill Buffer" . kill-buffer) |
| 154 | ("Help" . te-escape-help) |
| 155 | ("Set Redisplay Interval" . te-set-redisplay-interval) |
| 156 | ))) |
| 157 | |
| 158 | (defvar terminal-more-break-map nil) |
| 159 | (if terminal-more-break-map |
| 160 | nil |
| 161 | (let ((map (make-sparse-keymap))) |
| 162 | (define-key map [t] 'te-more-break-unread) |
| 163 | (define-key map (char-to-string help-char) 'te-more-break-help) |
| 164 | (define-key map " " 'te-more-break-resume) |
| 165 | (define-key map "\C-l" 'redraw-display) |
| 166 | (define-key map "\C-o" 'te-more-break-flush-pending-output) |
| 167 | ;;>>> this isn't right |
| 168 | ;(define-key map "\^?" 'te-more-break-flush-pending-output) ;DEL |
| 169 | (define-key map "\r" 'te-more-break-advance-one-line) |
| 170 | |
| 171 | (setq terminal-more-break-map map))) |
| 172 | |
| 173 | \f |
| 174 | ;;; Pacify the byte compiler |
| 175 | (defvar te-process nil) |
| 176 | (defvar te-log-buffer nil) |
| 177 | (defvar te-height nil) |
| 178 | (defvar te-width nil) |
| 179 | (defvar te-more-count nil) |
| 180 | (defvar te-redisplay-count nil) |
| 181 | (defvar te-pending-output nil) |
| 182 | (defvar te-saved-point) |
| 183 | (defvar te-more-old-point nil) |
| 184 | (defvar te-more-old-local-map nil) |
| 185 | (defvar te-more-old-filter nil) |
| 186 | (defvar te-more-old-mode-line-format nil) |
| 187 | (defvar te-pending-output-info nil) |
| 188 | |
| 189 | ;; Required to support terminfo systems |
| 190 | (defconst te-terminal-name-prefix "emacs-em" |
| 191 | "Prefix used for terminal type names for Terminfo.") |
| 192 | (defconst te-terminfo-directory |
| 193 | (file-name-as-directory |
| 194 | (expand-file-name "emacs-terminfo" temporary-file-directory)) |
| 195 | "Directory used for run-time terminal definition files for Terminfo.") |
| 196 | (defvar te-terminal-name nil) |
| 197 | \f |
| 198 | ;;;; escape map |
| 199 | |
| 200 | (defun te-escape () |
| 201 | (interactive) |
| 202 | (let (s |
| 203 | (local (current-local-map)) |
| 204 | (global (current-global-map))) |
| 205 | (unwind-protect |
| 206 | (progn |
| 207 | (use-global-map terminal-escape-map) |
| 208 | (use-local-map terminal-escape-map) |
| 209 | (setq s (read-key-sequence |
| 210 | (if current-prefix-arg |
| 211 | (format "Emacs Terminal escape[%s for help]> %d " |
| 212 | (substitute-command-keys |
| 213 | "\\<terminal-escape-map>\\[te-escape-help]") |
| 214 | (prefix-numeric-value current-prefix-arg)) |
| 215 | (format "Emacs Terminal escape[%s for help]> " |
| 216 | (substitute-command-keys |
| 217 | "\\<terminal-escape-map>\\[te-escape-help]")))))) |
| 218 | (use-global-map global) |
| 219 | (use-local-map local)) |
| 220 | |
| 221 | (message "") |
| 222 | |
| 223 | (cond |
| 224 | ;; Certain keys give vector notation, like [escape] when |
| 225 | ;; you hit esc key... |
| 226 | ((and (stringp s) |
| 227 | (string= s (make-string 1 terminal-escape-char))) |
| 228 | (setq last-command-event terminal-escape-char) |
| 229 | (let ((terminal-escape-char -259)) |
| 230 | (te-pass-through))) |
| 231 | |
| 232 | ((setq s (lookup-key terminal-escape-map s)) |
| 233 | (call-interactively s))) |
| 234 | |
| 235 | )) |
| 236 | |
| 237 | |
| 238 | (defun te-escape-help () |
| 239 | "Provide help on commands available after terminal-escape-char is typed." |
| 240 | (interactive) |
| 241 | (message "Terminal emulator escape help...") |
| 242 | (let ((char (single-key-description terminal-escape-char))) |
| 243 | (with-electric-help |
| 244 | (function (lambda () |
| 245 | (princ (format "Terminal-emulator escape, invoked by \"%s\" |
| 246 | Type \"%s\" twice to send a single \"%s\" through. |
| 247 | |
| 248 | Other chars following \"%s\" are interpreted as follows:\n" |
| 249 | char char char char)) |
| 250 | |
| 251 | (princ (substitute-command-keys "\\{terminal-escape-map}\n")) |
| 252 | (princ (format "\nSubcommands of \"%s\" (%s)\n" |
| 253 | (where-is-internal 'te-escape-extended-command |
| 254 | terminal-escape-map t) |
| 255 | 'te-escape-extended-command)) |
| 256 | (let ((l (sort (copy-sequence te-escape-command-alist) |
| 257 | (function (lambda (a b) |
| 258 | (string< (car a) (car b))))))) |
| 259 | (while l |
| 260 | (let ((doc (or (documentation (cdr (car l))) |
| 261 | "Not documented"))) |
| 262 | (if (string-match "\n" doc) |
| 263 | ;; just use first line of documentation |
| 264 | (setq doc (substring doc 0 (match-beginning 0)))) |
| 265 | (princ " \"") |
| 266 | (princ (car (car l))) |
| 267 | (princ "\":\n ") |
| 268 | (princ doc) |
| 269 | (write-char ?\n)) |
| 270 | (setq l (cdr l)))) |
| 271 | nil))))) |
| 272 | |
| 273 | |
| 274 | |
| 275 | (defun te-escape-extended-command () |
| 276 | (interactive) |
| 277 | (let ((c (let ((completion-ignore-case t)) |
| 278 | (completing-read "terminal command: " |
| 279 | te-escape-command-alist |
| 280 | nil t)))) |
| 281 | (if c |
| 282 | (catch 'foo |
| 283 | (setq c (downcase c)) |
| 284 | (let ((l te-escape-command-alist)) |
| 285 | (while l |
| 286 | (if (string= c (downcase (car (car l)))) |
| 287 | (throw 'foo (call-interactively (cdr (car l)))) |
| 288 | (setq l (cdr l))))))))) |
| 289 | |
| 290 | ;; not used. |
| 291 | (defun te-escape-extended-command-unread () |
| 292 | (interactive) |
| 293 | (setq unread-command-events (listify-key-sequence (this-command-keys))) |
| 294 | (te-escape-extended-command)) |
| 295 | |
| 296 | (defun te-set-escape-char (c) |
| 297 | "Change the terminal-emulator escape character." |
| 298 | (interactive "cSet escape character to: ") |
| 299 | (let ((o terminal-escape-char)) |
| 300 | (message (if (= o c) |
| 301 | "\"%s\" is the escape char" |
| 302 | "\"%s\" is now the escape; \"%s\" passes through") |
| 303 | (single-key-description c) |
| 304 | (single-key-description o)) |
| 305 | (setq terminal-escape-char c))) |
| 306 | |
| 307 | |
| 308 | (defun te-stuff-string (string) |
| 309 | "Read a string to send to through the terminal emulator |
| 310 | as though that string had been typed on the keyboard. |
| 311 | |
| 312 | Very poor man's file transfer protocol." |
| 313 | (interactive "sStuff string: ") |
| 314 | (process-send-string te-process string)) |
| 315 | |
| 316 | (defun te-set-output-log (name) |
| 317 | "Record output from the terminal emulator in a buffer." |
| 318 | (interactive (list (if te-log-buffer |
| 319 | nil |
| 320 | (read-buffer "Record output in buffer: " |
| 321 | (format "%s output-log" |
| 322 | (buffer-name (current-buffer))) |
| 323 | nil)))) |
| 324 | (if (or (null name) (equal name "")) |
| 325 | (progn (setq te-log-buffer nil) |
| 326 | (message "Output logging off.")) |
| 327 | (if (get-buffer name) |
| 328 | nil |
| 329 | (with-current-buffer (get-buffer-create name) |
| 330 | (fundamental-mode) |
| 331 | (buffer-disable-undo (current-buffer)) |
| 332 | (erase-buffer))) |
| 333 | (setq te-log-buffer (get-buffer name)) |
| 334 | (message "Recording terminal emulator output into buffer \"%s\"" |
| 335 | (buffer-name te-log-buffer)))) |
| 336 | |
| 337 | (defun te-tofu () |
| 338 | "Discontinue output log." |
| 339 | (interactive) |
| 340 | (te-set-output-log nil)) |
| 341 | |
| 342 | |
| 343 | (defun te-toggle (sym arg) |
| 344 | (set sym (cond ((not (numberp arg)) arg) |
| 345 | ((= arg 1) (not (symbol-value sym))) |
| 346 | ((< arg 0) nil) |
| 347 | (t t)))) |
| 348 | |
| 349 | (defun te-toggle-more-processing (arg) |
| 350 | (interactive "p") |
| 351 | (message (if (te-toggle 'terminal-more-processing arg) |
| 352 | "More processing on" "More processing off")) |
| 353 | (if terminal-more-processing (setq te-more-count -1))) |
| 354 | |
| 355 | (defun te-toggle-scrolling (arg) |
| 356 | (interactive "p") |
| 357 | (message (if (te-toggle 'terminal-scrolling arg) |
| 358 | "Scroll at end of page" "Wrap at end of page"))) |
| 359 | |
| 360 | (defun te-enable-more-processing () |
| 361 | "Enable ** MORE ** processing" |
| 362 | (interactive) |
| 363 | (te-toggle-more-processing t)) |
| 364 | |
| 365 | (defun te-disable-more-processing () |
| 366 | "Disable ** MORE ** processing" |
| 367 | (interactive) |
| 368 | (te-toggle-more-processing nil)) |
| 369 | |
| 370 | (defun te-do-scrolling () |
| 371 | "Scroll at end of page (yuck)" |
| 372 | (interactive) |
| 373 | (te-toggle-scrolling t)) |
| 374 | |
| 375 | (defun te-do-wrapping () |
| 376 | "Wrap to top of window at end of page" |
| 377 | (interactive) |
| 378 | (te-toggle-scrolling nil)) |
| 379 | |
| 380 | |
| 381 | (defun te-set-redisplay-interval (arg) |
| 382 | "Set the maximum interval (in output characters) between screen updates. |
| 383 | Set this number to large value for greater throughput, |
| 384 | set it smaller for more frequent updates (but overall slower performance." |
| 385 | (interactive "NMax number of output chars between redisplay updates: ") |
| 386 | (setq arg (max arg 1)) |
| 387 | (setq terminal-redisplay-interval arg |
| 388 | te-redisplay-count 0)) |
| 389 | \f |
| 390 | ;;;; more map |
| 391 | |
| 392 | ;; every command -must- call te-more-break-unwind |
| 393 | ;; or grave lossage will result |
| 394 | |
| 395 | (put 'te-more-break-unread 'suppress-keymap t) |
| 396 | (defun te-more-break-unread () |
| 397 | (interactive) |
| 398 | (if (eq last-input-event terminal-escape-char) |
| 399 | (call-interactively 'te-escape) |
| 400 | (message "Continuing from more break (\"%s\" typed, %d chars output pending...)" |
| 401 | (single-key-description last-input-event) |
| 402 | (te-pending-output-length)) |
| 403 | (setq te-more-count 259259) |
| 404 | (te-more-break-unwind) |
| 405 | (let ((terminal-more-processing nil)) |
| 406 | (te-pass-through)))) |
| 407 | |
| 408 | (defun te-more-break-resume () |
| 409 | "Proceed past the **MORE** break, |
| 410 | allowing the next page of output to appear" |
| 411 | (interactive) |
| 412 | (message "Continuing from more break") |
| 413 | (te-more-break-unwind)) |
| 414 | |
| 415 | (defun te-more-break-help () |
| 416 | "Provide help on commands available in a terminal-emulator **MORE** break" |
| 417 | (interactive) |
| 418 | (message "Terminal-emulator more break help...") |
| 419 | (sit-for 0) |
| 420 | (with-electric-help |
| 421 | (function (lambda () |
| 422 | (princ "Terminal-emulator more break.\n\n") |
| 423 | (princ (format "Type \"%s\" (te-more-break-resume)\n%s\n" |
| 424 | (where-is-internal 'te-more-break-resume |
| 425 | terminal-more-break-map t) |
| 426 | (documentation 'te-more-break-resume))) |
| 427 | (princ (substitute-command-keys "\\{terminal-more-break-map}\n")) |
| 428 | (princ "Any other key is passed through to the program |
| 429 | running under the terminal emulator and disables more processing until |
| 430 | all pending output has been dealt with.") |
| 431 | nil)))) |
| 432 | |
| 433 | |
| 434 | (defun te-more-break-advance-one-line () |
| 435 | "Allow one more line of text to be output before doing another more break." |
| 436 | (interactive) |
| 437 | (setq te-more-count 1) |
| 438 | (te-more-break-unwind)) |
| 439 | |
| 440 | (defun te-more-break-flush-pending-output () |
| 441 | "Discard any output which has been received by the terminal emulator but |
| 442 | not yet processed and then proceed from the more break." |
| 443 | (interactive) |
| 444 | (te-more-break-unwind) |
| 445 | (te-flush-pending-output)) |
| 446 | |
| 447 | (defun te-flush-pending-output () |
| 448 | "Discard any as-yet-unprocessed output which has been received by |
| 449 | the terminal emulator." |
| 450 | (interactive) |
| 451 | ;; this could conceivably be confusing in the presence of |
| 452 | ;; escape-sequences spanning process-output chunks |
| 453 | (if (null (cdr te-pending-output)) |
| 454 | (message "(There is no output pending)") |
| 455 | (let ((length (te-pending-output-length))) |
| 456 | (message "Flushing %d chars of pending output" length) |
| 457 | (setq te-pending-output |
| 458 | (list 0 (format "\n*** %d chars of pending output flushed ***\n" |
| 459 | length))) |
| 460 | (te-update-pending-output-display) |
| 461 | (te-process-output nil) |
| 462 | (sit-for 0)))) |
| 463 | |
| 464 | \f |
| 465 | (defun te-pass-through () |
| 466 | "Character is passed to the program running under the terminal emulator. |
| 467 | One characters is treated specially: |
| 468 | the terminal escape character (normally C-^) |
| 469 | lets you type a terminal emulator command." |
| 470 | (interactive) |
| 471 | (cond ((eq last-input-event terminal-escape-char) |
| 472 | (call-interactively 'te-escape)) |
| 473 | (t |
| 474 | ;; Convert `return' to C-m, etc. |
| 475 | (if (and (symbolp last-input-event) |
| 476 | (get last-input-event 'ascii-character)) |
| 477 | (setq last-input-event (get last-input-event 'ascii-character))) |
| 478 | ;; Convert meta characters to 8-bit form for transmission. |
| 479 | (if (and (integerp last-input-event) |
| 480 | (not (zerop (logand last-input-event ?\M-\^@)))) |
| 481 | (setq last-input-event (+ 128 (logand last-input-event 127)))) |
| 482 | ;; Now ignore all but actual characters. |
| 483 | ;; (It ought to be possible to send through function |
| 484 | ;; keys as character sequences if we add a description |
| 485 | ;; to our termcap entry of what they should look like.) |
| 486 | (if (integerp last-input-event) |
| 487 | (progn |
| 488 | (and terminal-more-processing (null (cdr te-pending-output)) |
| 489 | (te-set-more-count nil)) |
| 490 | (process-send-string te-process (make-string 1 last-input-event)) |
| 491 | (te-process-output t)) |
| 492 | (message "Function key `%s' ignored" |
| 493 | (single-key-description last-input-event)))))) |
| 494 | |
| 495 | |
| 496 | (defun te-set-window-start () |
| 497 | (let* ((w (get-buffer-window (current-buffer))) |
| 498 | (h (if w (window-height w)))) |
| 499 | (cond ((not w)) ; buffer not displayed |
| 500 | ((>= h (/ (- (point) (point-min)) (1+ te-width))) |
| 501 | ;; this is the normal case |
| 502 | (set-window-start w (point-min))) |
| 503 | ;; this happens if some vandal shrinks our window. |
| 504 | ((>= h (/ (- (point-max) (point)) (1+ te-width))) |
| 505 | (set-window-start w (- (point-max) (* h (1+ te-width)) -1))) |
| 506 | ;; I give up. |
| 507 | (t nil)))) |
| 508 | |
| 509 | (defun te-pending-output-length () |
| 510 | (let ((length (car te-pending-output)) |
| 511 | (tem (cdr te-pending-output))) |
| 512 | (while tem |
| 513 | (setq length (+ length (length (car tem))) tem (cdr tem))) |
| 514 | length)) |
| 515 | \f |
| 516 | ;;>> What use is this terminal-edit stuff anyway? |
| 517 | ;;>> If nothing else, it was written by somebody who didn't |
| 518 | ;;>> competently understand the terminal-emulator... |
| 519 | |
| 520 | (defvar terminal-edit-map nil) |
| 521 | (if terminal-edit-map |
| 522 | nil |
| 523 | (setq terminal-edit-map (make-sparse-keymap)) |
| 524 | (define-key terminal-edit-map "\C-c\C-c" 'terminal-cease-edit)) |
| 525 | |
| 526 | ;; Terminal Edit mode is suitable only for specially formatted data. |
| 527 | (put 'terminal-edit-mode 'mode-class 'special) |
| 528 | |
| 529 | (defun terminal-edit-mode () |
| 530 | "Major mode for editing the contents of a terminal-emulator buffer. |
| 531 | The editing commands are the same as in Fundamental mode, |
| 532 | together with a command \\<terminal-edit-map>to return to terminal emulation: \\[terminal-cease-edit]." |
| 533 | (use-local-map terminal-edit-map) |
| 534 | (setq major-mode 'terminal-edit-mode) |
| 535 | (setq mode-name "Terminal Edit") |
| 536 | (setq mode-line-modified (default-value 'mode-line-modified)) |
| 537 | (setq mode-line-process nil) |
| 538 | (run-mode-hooks 'terminal-edit-mode-hook)) |
| 539 | |
| 540 | (defun te-edit () |
| 541 | "Start editing the terminal emulator buffer with ordinary Emacs commands." |
| 542 | (interactive) |
| 543 | (terminal-edit-mode) |
| 544 | (force-mode-line-update) |
| 545 | ;; Make mode line update. |
| 546 | (if (eq (key-binding "\C-c\C-c") 'terminal-cease-edit) |
| 547 | (message "Editing: Type C-c C-c to return to Terminal") |
| 548 | (message "%s" |
| 549 | (substitute-command-keys |
| 550 | "Editing: Type \\[terminal-cease-edit] to return to Terminal")))) |
| 551 | |
| 552 | (defun terminal-cease-edit () |
| 553 | "Finish editing message; switch back to Terminal proper." |
| 554 | (interactive) |
| 555 | |
| 556 | ;;>> emulator will blow out if buffer isn't exactly te-width x te-height |
| 557 | (let ((buffer-read-only nil)) |
| 558 | (widen) |
| 559 | (let ((opoint (point-marker)) |
| 560 | (width te-width) |
| 561 | (h (1- te-height))) |
| 562 | (goto-char (point-min)) |
| 563 | (while (>= h 0) |
| 564 | (let ((p (point))) |
| 565 | (cond ((search-forward "\n" (+ p width) 'move) |
| 566 | (forward-char -1) |
| 567 | (insert-char ?\s (- width (- (point) p))) |
| 568 | (forward-char 1)) |
| 569 | ((eobp) |
| 570 | (insert-char ?\s (- width (- (point) p)))) |
| 571 | ((= (following-char) ?\n) |
| 572 | (forward-char 1)) |
| 573 | (t |
| 574 | (setq p (point)) |
| 575 | (if (search-forward "\n" nil t) |
| 576 | (delete-region p (1- (point))) |
| 577 | (delete-region p (point-max)))))) |
| 578 | (if (= h 0) |
| 579 | (if (not (eobp)) (delete-region (point) (point-max))) |
| 580 | (if (eobp) (insert ?\n))) |
| 581 | (setq h (1- h))) |
| 582 | (goto-char opoint) |
| 583 | (set-marker opoint nil nil) |
| 584 | (setq te-saved-point (point)) |
| 585 | (setq te-redisplay-count 0) |
| 586 | (setq te-more-count -1))) |
| 587 | |
| 588 | (setq mode-line-modified (default-value 'mode-line-modified)) |
| 589 | (use-local-map terminal-map) |
| 590 | (setq major-mode 'terminal-mode) |
| 591 | (setq mode-name "terminal") |
| 592 | (setq mode-line-process '(":%s"))) |
| 593 | \f |
| 594 | ;;;; more break hair |
| 595 | |
| 596 | (defun te-more-break () |
| 597 | (te-set-more-count t) |
| 598 | (make-local-variable 'te-more-old-point) |
| 599 | (setq te-more-old-point (point)) |
| 600 | (make-local-variable 'te-more-old-local-map) |
| 601 | (setq te-more-old-local-map (current-local-map)) |
| 602 | (use-local-map terminal-more-break-map) |
| 603 | (make-local-variable 'te-more-old-filter) |
| 604 | (setq te-more-old-filter (process-filter te-process)) |
| 605 | (make-local-variable 'te-more-old-mode-line-format) |
| 606 | (setq te-more-old-mode-line-format mode-line-format |
| 607 | mode-line-format (list "-- **MORE** " |
| 608 | mode-line-buffer-identification |
| 609 | "%-")) |
| 610 | (set-process-filter te-process |
| 611 | (function (lambda (process string) |
| 612 | (with-current-buffer (process-buffer process) |
| 613 | (setq te-pending-output (nconc te-pending-output |
| 614 | (list string)))) |
| 615 | (te-update-pending-output-display)))) |
| 616 | (te-update-pending-output-display) |
| 617 | (if (eq (window-buffer (selected-window)) (current-buffer)) |
| 618 | (message "More break ")) |
| 619 | (or (eobp) |
| 620 | (null terminal-more-break-insertion) |
| 621 | (save-excursion |
| 622 | (forward-char 1) |
| 623 | (delete-region (point) (+ (point) te-width)) |
| 624 | (insert terminal-more-break-insertion))) |
| 625 | (run-hooks 'terminal-more-break-hook) |
| 626 | (sit-for 0) ;get display to update |
| 627 | (throw 'te-process-output t)) |
| 628 | |
| 629 | (defun te-more-break-unwind () |
| 630 | (use-local-map te-more-old-local-map) |
| 631 | (set-process-filter te-process te-more-old-filter) |
| 632 | (goto-char te-more-old-point) |
| 633 | (setq mode-line-format te-more-old-mode-line-format) |
| 634 | (force-mode-line-update) |
| 635 | (let ((buffer-read-only nil)) |
| 636 | (cond ((eobp)) |
| 637 | (terminal-more-break-insertion |
| 638 | (forward-char 1) |
| 639 | (delete-region (point) |
| 640 | (+ (point) (length terminal-more-break-insertion))) |
| 641 | (insert-char ?\s te-width) |
| 642 | (goto-char te-more-old-point))) |
| 643 | (setq te-more-old-point nil) |
| 644 | (let ((te-more-count 259259)) |
| 645 | (te-newline))) |
| 646 | ;(sit-for 0) |
| 647 | (te-process-output t)) |
| 648 | |
| 649 | (defun te-set-more-count (newline) |
| 650 | (let ((line (/ (- (point) (point-min)) (1+ te-width)))) |
| 651 | (if newline (setq line (1+ line))) |
| 652 | (cond ((= line te-height) |
| 653 | (setq te-more-count te-height)) |
| 654 | ;>>>> something is strange. Investigate this! |
| 655 | ((= line (1- te-height)) |
| 656 | (setq te-more-count te-height)) |
| 657 | ((or (< line (/ te-height 2)) |
| 658 | (> (- te-height line) 10)) |
| 659 | ;; break at end of this page |
| 660 | (setq te-more-count (- te-height line))) |
| 661 | (t |
| 662 | ;; migrate back towards top (ie bottom) of screen. |
| 663 | (setq te-more-count (- te-height |
| 664 | (if (> te-height 10) 2 1))))))) |
| 665 | |
| 666 | \f |
| 667 | ;;;; More or less straight-forward terminal escapes |
| 668 | |
| 669 | ;; ^j, meaning `newline' to non-display programs. |
| 670 | ;; (Who would think of ever writing a system which doesn't understand |
| 671 | ;; display terminals natively? Un*x: The Operating System of the Future.) |
| 672 | (defun te-newline () |
| 673 | "Move down a line, optionally do more processing, perhaps wrap/scroll, |
| 674 | move to start of new line, clear to end of line." |
| 675 | (end-of-line) |
| 676 | (cond ((not terminal-more-processing)) |
| 677 | ((< (setq te-more-count (1- te-more-count)) 0) |
| 678 | (te-set-more-count t)) |
| 679 | ((eq te-more-count 0) |
| 680 | ;; this doesn't return |
| 681 | (te-more-break))) |
| 682 | (if (eobp) |
| 683 | (progn |
| 684 | (delete-region (point-min) (+ (point-min) te-width)) |
| 685 | (goto-char (point-min)) |
| 686 | (if terminal-scrolling |
| 687 | (progn (delete-char 1) |
| 688 | (goto-char (point-max)) |
| 689 | (insert ?\n)))) |
| 690 | (forward-char 1) |
| 691 | (delete-region (point) (+ (point) te-width))) |
| 692 | (insert-char ?\s te-width) |
| 693 | (beginning-of-line) |
| 694 | (te-set-window-start)) |
| 695 | |
| 696 | ; ^p = x+32 y+32 |
| 697 | (defun te-move-to-position () |
| 698 | ;; must offset by #o40 since cretinous unix won't send a 004 char through |
| 699 | (let ((y (- (te-get-char) 32)) |
| 700 | (x (- (te-get-char) 32))) |
| 701 | (if (or (> x te-width) |
| 702 | (> y te-height)) |
| 703 | () |
| 704 | (goto-char (+ (point-min) x (* y (1+ te-width)))) |
| 705 | ;(te-set-window-start?) |
| 706 | )) |
| 707 | (setq te-more-count -1)) |
| 708 | |
| 709 | |
| 710 | |
| 711 | ;; ^p c |
| 712 | (defun te-clear-rest-of-line () |
| 713 | (save-excursion |
| 714 | (let ((n (- (point) (progn (end-of-line) (point))))) |
| 715 | (delete-region (point) (+ (point) n)) |
| 716 | (insert-char ?\s (- n))))) |
| 717 | |
| 718 | |
| 719 | ;; ^p C |
| 720 | (defun te-clear-rest-of-screen () |
| 721 | (save-excursion |
| 722 | (te-clear-rest-of-line) |
| 723 | (while (progn (end-of-line) (not (eobp))) |
| 724 | (forward-char 1) (end-of-line) |
| 725 | (delete-region (- (point) te-width) (point)) |
| 726 | (insert-char ?\s te-width)))) |
| 727 | |
| 728 | |
| 729 | ;; ^p ^l |
| 730 | (defun te-clear-screen () |
| 731 | ;; regenerate buffer to compensate for (nonexistent!!) bugs. |
| 732 | (erase-buffer) |
| 733 | (let ((i 0)) |
| 734 | (while (< i te-height) |
| 735 | (setq i (1+ i)) |
| 736 | (insert-char ?\s te-width) |
| 737 | (insert ?\n))) |
| 738 | (delete-region (1- (point-max)) (point-max)) |
| 739 | (goto-char (point-min)) |
| 740 | (setq te-more-count -1)) |
| 741 | |
| 742 | |
| 743 | ;; ^p ^o count+32 |
| 744 | (defun te-insert-lines () |
| 745 | (if (not (bolp)) |
| 746 | ();(error "fooI") |
| 747 | (save-excursion |
| 748 | (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1)) |
| 749 | (n (min (- (te-get-char) ?\s) line)) |
| 750 | (i 0)) |
| 751 | (delete-region (- (point-max) (* n (1+ te-width))) (point-max)) |
| 752 | (if (eq (point) (point-max)) (insert ?\n)) |
| 753 | (while (< i n) |
| 754 | (setq i (1+ i)) |
| 755 | (insert-char ?\s te-width) |
| 756 | (or (eq i line) (insert ?\n)))))) |
| 757 | (setq te-more-count -1)) |
| 758 | |
| 759 | |
| 760 | ;; ^p ^k count+32 |
| 761 | (defun te-delete-lines () |
| 762 | (if (not (bolp)) |
| 763 | ();(error "fooD") |
| 764 | (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1)) |
| 765 | (n (min (- (te-get-char) ?\s) line)) |
| 766 | (i 0)) |
| 767 | (delete-region (point) |
| 768 | (min (+ (point) (* n (1+ te-width))) (point-max))) |
| 769 | (save-excursion |
| 770 | (goto-char (point-max)) |
| 771 | (while (< i n) |
| 772 | (setq i (1+ i)) |
| 773 | (insert-char ?\s te-width) |
| 774 | (or (eq i line) (insert ?\n)))))) |
| 775 | (setq te-more-count -1)) |
| 776 | |
| 777 | ;; ^p ^a |
| 778 | (defun te-beginning-of-line () |
| 779 | (beginning-of-line)) |
| 780 | |
| 781 | ;; ^p ^b |
| 782 | (defun te-backward-char () |
| 783 | (if (not (bolp)) |
| 784 | (backward-char 1))) |
| 785 | |
| 786 | ;; ^p ^f |
| 787 | (defun te-forward-char () |
| 788 | (if (not (eolp)) |
| 789 | (forward-char 1))) |
| 790 | |
| 791 | \f |
| 792 | ;; 0177 |
| 793 | (defun te-delete () |
| 794 | (if (bolp) |
| 795 | () |
| 796 | (delete-region (1- (point)) (point)) |
| 797 | (insert ?\s) |
| 798 | (forward-char -1))) |
| 799 | |
| 800 | ;; ^p ^g |
| 801 | (defun te-beep () |
| 802 | (beep)) |
| 803 | |
| 804 | |
| 805 | ;; ^p _ count+32 |
| 806 | (defun te-insert-spaces () |
| 807 | (let* ((p (point)) |
| 808 | (n (min (- (te-get-char) 32) |
| 809 | (- (progn (end-of-line) (point)) p)))) |
| 810 | (if (<= n 0) |
| 811 | nil |
| 812 | (delete-char (- n)) |
| 813 | (goto-char p) |
| 814 | (insert-char ?\s n)) |
| 815 | (goto-char p))) |
| 816 | |
| 817 | ;; ^p d count+32 (should be ^p ^d but cretinous un*x won't send ^d chars!!!) |
| 818 | (defun te-delete-char () |
| 819 | (let* ((p (point)) |
| 820 | (n (min (- (te-get-char) 32) |
| 821 | (- (progn (end-of-line) (point)) p)))) |
| 822 | (if (<= n 0) |
| 823 | nil |
| 824 | (insert-char ?\s n) |
| 825 | (goto-char p) |
| 826 | (delete-char n)) |
| 827 | (goto-char p))) |
| 828 | |
| 829 | |
| 830 | \f |
| 831 | ;; disgusting unix-required excrement |
| 832 | ;; Are we living twenty years in the past yet? |
| 833 | |
| 834 | (defun te-losing-unix () |
| 835 | nil) |
| 836 | |
| 837 | ;; ^i |
| 838 | (defun te-output-tab () |
| 839 | (let* ((p (point)) |
| 840 | (x (- p (progn (beginning-of-line) (point)))) |
| 841 | (l (min (- 8 (logand x 7)) |
| 842 | (progn (end-of-line) (- (point) p))))) |
| 843 | (goto-char (+ p l)))) |
| 844 | |
| 845 | ;; ^p ^j |
| 846 | ;; Handle the `do' or `nl' termcap capability. |
| 847 | ;;>> I am not sure why this broken, obsolete, capability is here. |
| 848 | ;;>> Perhaps it is for VIle. No comment was made about why it |
| 849 | ;;>> was added (in "Sun Dec 6 01:22:27 1987 Richard Stallman") |
| 850 | (defun te-down-vertically-or-scroll () |
| 851 | "Move down a line vertically, or scroll at bottom." |
| 852 | (let ((column (current-column))) |
| 853 | (end-of-line) |
| 854 | (if (eobp) |
| 855 | (progn |
| 856 | (delete-region (point-min) (+ (point-min) te-width)) |
| 857 | (goto-char (point-min)) |
| 858 | (delete-char 1) |
| 859 | (goto-char (point-max)) |
| 860 | (insert ?\n) |
| 861 | (insert-char ?\s te-width) |
| 862 | (beginning-of-line)) |
| 863 | (forward-line 1)) |
| 864 | (move-to-column column)) |
| 865 | (te-set-window-start)) |
| 866 | |
| 867 | ;; Also: |
| 868 | ;; ^m => beginning-of-line (for which it -should- be using ^p ^a, right?!!) |
| 869 | ;; ^g => te-beep (for which it should use ^p ^g) |
| 870 | ;; ^h => te-backward-char (for which it should use ^p ^b) |
| 871 | |
| 872 | \f |
| 873 | |
| 874 | (defun te-filter (process string) |
| 875 | (with-current-buffer (process-buffer process) |
| 876 | (goto-char te-saved-point) |
| 877 | (and (bufferp te-log-buffer) |
| 878 | (if (null (buffer-name te-log-buffer)) |
| 879 | ;; killed |
| 880 | (setq te-log-buffer nil) |
| 881 | (set-buffer te-log-buffer) |
| 882 | (goto-char (point-max)) |
| 883 | (insert-before-markers string) |
| 884 | (set-buffer (process-buffer process)))) |
| 885 | (setq te-pending-output (nconc te-pending-output (list string))) |
| 886 | (te-update-pending-output-display) |
| 887 | (te-process-output (eq (current-buffer) |
| 888 | (window-buffer (selected-window)))) |
| 889 | (set-buffer (process-buffer process)) |
| 890 | (setq te-saved-point (point)))) |
| 891 | |
| 892 | ;; (A version of the following comment which might be distractingly offensive |
| 893 | ;; to some readers has been moved to term-nasty.el.) |
| 894 | ;; unix lacks ITS-style tty control... |
| 895 | (defun te-process-output (preemptible) |
| 896 | ;;>> There seems no good reason to ever disallow preemption |
| 897 | (setq preemptible t) |
| 898 | (catch 'te-process-output |
| 899 | (let ((buffer-read-only nil) |
| 900 | (string nil) ostring start char (matchpos nil)) |
| 901 | (while (cdr te-pending-output) |
| 902 | (setq ostring string |
| 903 | start (car te-pending-output) |
| 904 | string (car (cdr te-pending-output)) |
| 905 | char (aref string start)) |
| 906 | (if (eq (setq start (1+ start)) (length string)) |
| 907 | (progn (setq te-pending-output |
| 908 | (cons 0 (cdr (cdr te-pending-output))) |
| 909 | start 0 |
| 910 | string (car (cdr te-pending-output))) |
| 911 | (te-update-pending-output-display)) |
| 912 | (setcar te-pending-output start)) |
| 913 | (if (and (> char ?\037) (< char ?\377)) |
| 914 | (cond ((eolp) |
| 915 | ;; unread char |
| 916 | (if (eq start 0) |
| 917 | (setq te-pending-output |
| 918 | (cons 0 (cons (make-string 1 char) |
| 919 | (cdr te-pending-output)))) |
| 920 | (setcar te-pending-output (1- start))) |
| 921 | (te-newline)) |
| 922 | ((null string) |
| 923 | (delete-char 1) (insert char) |
| 924 | (te-redisplay-if-necessary 1)) |
| 925 | (t |
| 926 | (let ((end (or (and (eq ostring string) matchpos) |
| 927 | (setq matchpos (string-match |
| 928 | "[\000-\037\177-\377]" |
| 929 | string start)) |
| 930 | (length string)))) |
| 931 | (delete-char 1) (insert char) |
| 932 | (setq char (point)) (end-of-line) |
| 933 | (setq end (min end (+ start (- (point) char)))) |
| 934 | (goto-char char) |
| 935 | (if (eq end matchpos) (setq matchpos nil)) |
| 936 | (delete-region (point) (+ (point) (- end start))) |
| 937 | (insert (if (and (eq start 0) |
| 938 | (eq end (length string))) |
| 939 | string |
| 940 | (substring string start end))) |
| 941 | (if (eq end (length string)) |
| 942 | (setq te-pending-output |
| 943 | (cons 0 (cdr (cdr te-pending-output)))) |
| 944 | (setcar te-pending-output end)) |
| 945 | (te-redisplay-if-necessary (1+ (- end start)))))) |
| 946 | ;; I suppose if I split the guts of this out into a separate |
| 947 | ;; function we could trivially emulate different terminals |
| 948 | ;; Who cares in any case? (Apart from stupid losers using rlogin) |
| 949 | (funcall |
| 950 | (if (eq char ?\^p) |
| 951 | (or (cdr (assq (te-get-char) |
| 952 | '((?= . te-move-to-position) |
| 953 | (?c . te-clear-rest-of-line) |
| 954 | (?C . te-clear-rest-of-screen) |
| 955 | (?\C-o . te-insert-lines) |
| 956 | (?\C-k . te-delete-lines) |
| 957 | ;; not necessary, but help sometimes. |
| 958 | (?\C-a . te-beginning-of-line) |
| 959 | (?\C-b . te-backward-char) |
| 960 | ;; should be C-d, but un*x |
| 961 | ;; pty's won't send \004 through! |
| 962 | ;; Can you believe this? |
| 963 | (?d . te-delete-char) |
| 964 | (?_ . te-insert-spaces) |
| 965 | ;; random |
| 966 | (?\C-f . te-forward-char) |
| 967 | (?\C-g . te-beep) |
| 968 | (?\C-j . te-down-vertically-or-scroll) |
| 969 | (?\C-l . te-clear-screen) |
| 970 | ))) |
| 971 | 'te-losing-unix) |
| 972 | (or (cdr (assq char |
| 973 | '((?\C-j . te-newline) |
| 974 | (?\177 . te-delete) |
| 975 | ;; Did I ask to be sent these characters? |
| 976 | ;; I don't remember doing so, either. |
| 977 | ;; (Perhaps some operating system or |
| 978 | ;; other is completely incompetent...) |
| 979 | (?\C-m . te-beginning-of-line) |
| 980 | (?\C-g . te-beep) |
| 981 | (?\C-h . te-backward-char) |
| 982 | (?\C-i . te-output-tab)))) |
| 983 | 'te-losing-unix))) |
| 984 | (te-redisplay-if-necessary 1)) |
| 985 | (and preemptible |
| 986 | (input-pending-p) |
| 987 | ;; preemptible output! Oh my!! |
| 988 | (throw 'te-process-output t))))) |
| 989 | ;; We must update window-point in every window displaying our buffer |
| 990 | (walk-windows (lambda (w) |
| 991 | (when (and (not (eq w (selected-window))) |
| 992 | (eq (window-buffer w) (current-buffer))) |
| 993 | (set-window-point w (point)))))) |
| 994 | |
| 995 | (defun te-get-char () |
| 996 | (if (cdr te-pending-output) |
| 997 | (let ((start (car te-pending-output)) |
| 998 | (string (car (cdr te-pending-output)))) |
| 999 | (prog1 (aref string start) |
| 1000 | (if (eq (setq start (1+ start)) (length string)) |
| 1001 | (setq te-pending-output (cons 0 (cdr (cdr te-pending-output)))) |
| 1002 | (setcar te-pending-output start)))) |
| 1003 | (catch 'char |
| 1004 | (let ((filter (process-filter te-process))) |
| 1005 | (unwind-protect |
| 1006 | (progn |
| 1007 | (set-process-filter te-process |
| 1008 | (function (lambda (_p s) |
| 1009 | (or (eq (length s) 1) |
| 1010 | (setq te-pending-output (list 1 s))) |
| 1011 | (throw 'char (aref s 0))))) |
| 1012 | (accept-process-output te-process)) |
| 1013 | (set-process-filter te-process filter)))))) |
| 1014 | |
| 1015 | |
| 1016 | (defun te-redisplay-if-necessary (length) |
| 1017 | (and (<= (setq te-redisplay-count (- te-redisplay-count length)) 0) |
| 1018 | (eq (current-buffer) (window-buffer (selected-window))) |
| 1019 | (waiting-for-user-input-p) |
| 1020 | (progn (te-update-pending-output-display) |
| 1021 | (sit-for 0) |
| 1022 | (setq te-redisplay-count terminal-redisplay-interval)))) |
| 1023 | |
| 1024 | (defun te-update-pending-output-display () |
| 1025 | (if (null (cdr te-pending-output)) |
| 1026 | (setq te-pending-output-info "") |
| 1027 | (let ((length (te-pending-output-length))) |
| 1028 | (if (< length 1500) |
| 1029 | (setq te-pending-output-info "") |
| 1030 | (setq te-pending-output-info (format "(%dK chars output pending) " |
| 1031 | (/ (+ length 512) 1024)))))) |
| 1032 | (force-mode-line-update)) |
| 1033 | |
| 1034 | \f |
| 1035 | (defun te-sentinel (process message) |
| 1036 | (cond ((eq (process-status process) 'run)) |
| 1037 | ((null (buffer-name (process-buffer process)))) ;deleted |
| 1038 | (t (let ((b (current-buffer))) |
| 1039 | (with-current-buffer (process-buffer process) |
| 1040 | (setq buffer-read-only nil) |
| 1041 | (fundamental-mode) |
| 1042 | (goto-char (point-max)) |
| 1043 | (delete-blank-lines) |
| 1044 | (delete-horizontal-space) |
| 1045 | (insert "\n*******\n" message "*******\n")) |
| 1046 | (if (and (eq b (process-buffer process)) |
| 1047 | (waiting-for-user-input-p)) |
| 1048 | (progn (goto-char (point-max)) |
| 1049 | (recenter -1))))))) |
| 1050 | \f |
| 1051 | (defvar te-stty-string "stty -nl erase '^?' kill '^u' intr '^c' echo pass8" |
| 1052 | "Shell command to set terminal modes for terminal emulator.") |
| 1053 | ;; This used to have `new' in it, but that loses outside BSD |
| 1054 | ;; and it's apparently not needed in BSD. |
| 1055 | |
| 1056 | (defcustom explicit-shell-file-name nil |
| 1057 | "If non-nil, is file name to use for explicitly requested inferior shell." |
| 1058 | :type '(choice (const :tag "None" nil) |
| 1059 | file) |
| 1060 | :group 'terminal) |
| 1061 | |
| 1062 | ;;;###autoload |
| 1063 | (defun terminal-emulator (buffer program args &optional width height) |
| 1064 | "Under a display-terminal emulator in BUFFER, run PROGRAM on arguments ARGS. |
| 1065 | ARGS is a list of argument-strings. Remaining arguments are WIDTH and HEIGHT. |
| 1066 | BUFFER's contents are made an image of the display generated by that program, |
| 1067 | and any input typed when BUFFER is the current Emacs buffer is sent to that |
| 1068 | program as keyboard input. |
| 1069 | |
| 1070 | Interactively, BUFFER defaults to \"*terminal*\" and PROGRAM and ARGS |
| 1071 | are parsed from an input-string using your usual shell. |
| 1072 | WIDTH and HEIGHT are determined from the size of the current window |
| 1073 | -- WIDTH will be one less than the window's width, HEIGHT will be its height. |
| 1074 | |
| 1075 | To switch buffers and leave the emulator, or to give commands |
| 1076 | to the emulator itself (as opposed to the program running under it), |
| 1077 | type Control-^. The following character is an emulator command. |
| 1078 | Type Control-^ twice to send it to the subprogram. |
| 1079 | This escape character may be changed using the variable `terminal-escape-char'. |
| 1080 | |
| 1081 | `Meta' characters may not currently be sent through the terminal emulator. |
| 1082 | |
| 1083 | Here is a list of some of the variables which control the behavior |
| 1084 | of the emulator -- see their documentation for more information: |
| 1085 | terminal-escape-char, terminal-scrolling, terminal-more-processing, |
| 1086 | terminal-redisplay-interval. |
| 1087 | |
| 1088 | This function calls the value of terminal-mode-hook if that exists |
| 1089 | and is non-nil after the terminal buffer has been set up and the |
| 1090 | subprocess started." |
| 1091 | (interactive |
| 1092 | (cons (with-current-buffer (get-buffer-create "*terminal*") |
| 1093 | (buffer-name (if (or (not (boundp 'te-process)) |
| 1094 | (null te-process) |
| 1095 | (not (eq (process-status te-process) |
| 1096 | 'run))) |
| 1097 | (current-buffer) |
| 1098 | (generate-new-buffer "*terminal*")))) |
| 1099 | (append |
| 1100 | (let* ((default-s |
| 1101 | ;; Default shell is same thing M-x shell uses. |
| 1102 | (or explicit-shell-file-name |
| 1103 | (getenv "ESHELL") |
| 1104 | (getenv "SHELL") |
| 1105 | "/bin/sh")) |
| 1106 | (s (read-string |
| 1107 | (format "Run program in emulator (default %s): " |
| 1108 | default-s)))) |
| 1109 | (if (equal s "") |
| 1110 | (list default-s '()) |
| 1111 | (te-parse-program-and-args s)))))) |
| 1112 | (switch-to-buffer buffer) |
| 1113 | (if (null width) (setq width (- (window-width (selected-window)) 1))) |
| 1114 | (if (null height) (setq height (- (window-height (selected-window)) 1))) |
| 1115 | (terminal-mode) |
| 1116 | (setq te-width width te-height height) |
| 1117 | (setq te-terminal-name (concat te-terminal-name-prefix |
| 1118 | (number-to-string te-width) |
| 1119 | (number-to-string te-height))) |
| 1120 | (setq mode-line-buffer-identification |
| 1121 | (list (format "Emacs terminal %dx%d: %%b " te-width te-height) |
| 1122 | 'te-pending-output-info)) |
| 1123 | (let ((buffer-read-only nil)) |
| 1124 | (te-clear-screen)) |
| 1125 | (let (process) |
| 1126 | (while (setq process (get-buffer-process (current-buffer))) |
| 1127 | (if (y-or-n-p (format "Kill process %s? " (process-name process))) |
| 1128 | (delete-process process) |
| 1129 | (error "Process %s not killed" (process-name process))))) |
| 1130 | (condition-case err |
| 1131 | (let ((process-environment |
| 1132 | (cons (concat "TERM=" te-terminal-name) |
| 1133 | (cons (concat "TERMCAP=" (te-create-termcap)) |
| 1134 | (cons (concat "TERMINFO=" (te-create-terminfo)) |
| 1135 | process-environment))))) |
| 1136 | (setq te-process |
| 1137 | (start-process "terminal-emulator" (current-buffer) |
| 1138 | "/bin/sh" "-c" |
| 1139 | ;; Yuck!!! Start a shell to set some terminal |
| 1140 | ;; control characteristics. Then start the |
| 1141 | ;; "env" program to setup the terminal type |
| 1142 | ;; Then finally start the program we wanted. |
| 1143 | (format "%s; exec %s" |
| 1144 | te-stty-string |
| 1145 | (mapconcat 'te-quote-arg-for-sh |
| 1146 | (cons program args) " ")))) |
| 1147 | (set-process-filter te-process 'te-filter) |
| 1148 | (set-process-sentinel te-process 'te-sentinel)) |
| 1149 | (error (fundamental-mode) |
| 1150 | (signal (car err) (cdr err)))) |
| 1151 | (setq inhibit-quit t) ;sport death |
| 1152 | (use-local-map terminal-map) |
| 1153 | (run-hooks 'terminal-mode-hook) |
| 1154 | (message "Entering Emacs terminal-emulator... Type %s %s for help" |
| 1155 | (single-key-description terminal-escape-char) |
| 1156 | (mapconcat 'single-key-description |
| 1157 | (where-is-internal 'te-escape-help terminal-escape-map t) |
| 1158 | " "))) |
| 1159 | |
| 1160 | |
| 1161 | (defun te-parse-program-and-args (s) |
| 1162 | (cond ((string-match "\\`\\([-a-zA-Z0-9+=_.@/:]+[ \t]*\\)+\\'" s) |
| 1163 | (let ((l ()) (p 0)) |
| 1164 | (while p |
| 1165 | (setq l (cons (if (string-match |
| 1166 | "\\([-a-zA-Z0-9+=_.@/:]+\\)\\([ \t]+\\)*" |
| 1167 | s p) |
| 1168 | (prog1 (substring s p (match-end 1)) |
| 1169 | (setq p (match-end 0)) |
| 1170 | (if (eq p (length s)) (setq p nil))) |
| 1171 | (prog1 (substring s p) |
| 1172 | (setq p nil))) |
| 1173 | l))) |
| 1174 | (setq l (nreverse l)) |
| 1175 | (list (car l) (cdr l)))) |
| 1176 | ((and (string-match "[ \t]" s) (not (file-exists-p s))) |
| 1177 | (list shell-file-name (list "-c" (concat "exec " s)))) |
| 1178 | (t (list s ())))) |
| 1179 | |
| 1180 | (put 'terminal-mode 'mode-class 'special) |
| 1181 | ;; This is only separated out from function terminal-emulator |
| 1182 | ;; to keep the latter a little more manageable. |
| 1183 | (defun terminal-mode () |
| 1184 | "Set up variables for use with the terminal-emulator. |
| 1185 | One should not call this -- it is an internal function |
| 1186 | of the terminal-emulator" |
| 1187 | (kill-all-local-variables) |
| 1188 | (buffer-disable-undo (current-buffer)) |
| 1189 | (setq major-mode 'terminal-mode) |
| 1190 | (setq mode-name "terminal") |
| 1191 | ; (make-local-variable 'Helper-return-blurb) |
| 1192 | ; (setq Helper-return-blurb "return to terminal simulator") |
| 1193 | (setq mode-line-process '(":%s")) |
| 1194 | (setq buffer-read-only t) |
| 1195 | (setq truncate-lines t) |
| 1196 | (make-local-variable 'terminal-escape-char) |
| 1197 | (setq terminal-escape-char (default-value 'terminal-escape-char)) |
| 1198 | (make-local-variable 'terminal-scrolling) |
| 1199 | (setq terminal-scrolling (default-value 'terminal-scrolling)) |
| 1200 | (make-local-variable 'terminal-more-processing) |
| 1201 | (setq terminal-more-processing (default-value 'terminal-more-processing)) |
| 1202 | (make-local-variable 'terminal-redisplay-interval) |
| 1203 | (setq terminal-redisplay-interval (default-value 'terminal-redisplay-interval)) |
| 1204 | (make-local-variable 'te-width) |
| 1205 | (make-local-variable 'te-height) |
| 1206 | (make-local-variable 'te-process) |
| 1207 | (make-local-variable 'te-pending-output) |
| 1208 | (setq te-pending-output (list 0)) |
| 1209 | (make-local-variable 'te-saved-point) |
| 1210 | (setq te-saved-point (point-min)) |
| 1211 | (make-local-variable 'te-pending-output-info) ;for the mode line |
| 1212 | (setq te-pending-output-info "") |
| 1213 | (make-local-variable 'inhibit-quit) |
| 1214 | ;(setq inhibit-quit t) |
| 1215 | (make-local-variable 'te-log-buffer) |
| 1216 | (setq te-log-buffer nil) |
| 1217 | (make-local-variable 'te-more-count) |
| 1218 | (setq te-more-count -1) |
| 1219 | (make-local-variable 'te-redisplay-count) |
| 1220 | (setq te-redisplay-count terminal-redisplay-interval) |
| 1221 | ;(use-local-map terminal-mode-map) |
| 1222 | ;; terminal-mode-hook is called above in function terminal-emulator |
| 1223 | ) |
| 1224 | \f |
| 1225 | ;;;; what a complete loss |
| 1226 | |
| 1227 | (defun te-quote-arg-for-sh (string) |
| 1228 | (cond ((string-match "\\`[-a-zA-Z0-9+=_.@/:]+\\'" |
| 1229 | string) |
| 1230 | string) |
| 1231 | ((not (string-match "[$]" string)) |
| 1232 | ;; "[\"\\]" are special to sh and the lisp reader in the same way |
| 1233 | (prin1-to-string string)) |
| 1234 | (t |
| 1235 | (let ((harder "") |
| 1236 | (start 0) |
| 1237 | (end 0)) |
| 1238 | (while (cond ((>= start (length string)) |
| 1239 | nil) |
| 1240 | ;; this is the set of chars magic with "..." in `sh' |
| 1241 | ((setq end (string-match "[\"\\$]" |
| 1242 | string start)) |
| 1243 | t) |
| 1244 | (t (setq harder (concat harder |
| 1245 | (substring string start))) |
| 1246 | nil)) |
| 1247 | (setq harder (concat harder (substring string start end) |
| 1248 | ;; Can't use ?\\ since `concat' |
| 1249 | ;; unfortunately does prin1-to-string |
| 1250 | ;; on fixna. Amazing. |
| 1251 | "\\" |
| 1252 | (substring string |
| 1253 | end |
| 1254 | (1+ end))) |
| 1255 | start (1+ end))) |
| 1256 | (concat "\"" harder "\""))))) |
| 1257 | |
| 1258 | (defun te-create-terminfo () |
| 1259 | "Create and compile a terminfo entry for the virtual terminal. This is kept |
| 1260 | in the directory specified by `te-terminfo-directory'." |
| 1261 | (when (and system-uses-terminfo |
| 1262 | (not (file-exists-p (concat te-terminfo-directory |
| 1263 | (substring te-terminal-name-prefix 0 1) |
| 1264 | "/" te-terminal-name)))) |
| 1265 | (let ( (terminfo |
| 1266 | (concat |
| 1267 | ;; The first newline avoids trouble with ncurses. |
| 1268 | (format "%s,\n\tmir, xon,cols#%d, lines#%d," |
| 1269 | te-terminal-name te-width te-height) |
| 1270 | "bel=^P^G, clear=^P\\f, cr=^P^A, cub1=^P^B, cud1=^P\\n," |
| 1271 | "cuf1=^P^F, cup=^P=%p1%'\\s'%+%c%p2%'\\s'%+%c," |
| 1272 | "dch=^Pd%p1%'\\s'%+%c, dch1=^Pd!, dl=^P^K%p1%'\\s'%+%c," |
| 1273 | "dl1=^P^K!, ed=^PC, el=^Pc, home=^P=\\s\\s," |
| 1274 | "ich=^P_%p1%'\\s'%+%c, ich1=^P_!, il=^P^O%p1%'\\s'%+%c," |
| 1275 | ;; The last newline avoids trouble with ncurses. |
| 1276 | "il1=^P^O!, ind=^P\\n, nel=\\n,\n")) |
| 1277 | ;; This is the desired name for the source file. |
| 1278 | (file-name (concat te-terminfo-directory te-terminal-name ".tif")) ) |
| 1279 | (make-directory te-terminfo-directory t) |
| 1280 | (let ((temp-file |
| 1281 | (make-temp-file (expand-file-name "tif" te-terminfo-directory)))) |
| 1282 | ;; Store the source file under a random temp name. |
| 1283 | (with-temp-file temp-file |
| 1284 | (insert terminfo)) |
| 1285 | ;; Rename it to the desired name. |
| 1286 | ;; We use this roundabout approach |
| 1287 | ;; to avoid any risk of writing a name that |
| 1288 | ;; was mischievously set up as a symlink. |
| 1289 | (rename-file temp-file file-name)) |
| 1290 | ;; Now compile that source to make the binary that the |
| 1291 | ;; programs actually use. |
| 1292 | (let ((process-environment |
| 1293 | (cons (concat "TERMINFO=" |
| 1294 | (directory-file-name te-terminfo-directory)) |
| 1295 | process-environment))) |
| 1296 | (set-process-sentinel (start-process "tic" nil "tic" file-name) |
| 1297 | 'te-tic-sentinel)))) |
| 1298 | (directory-file-name te-terminfo-directory)) |
| 1299 | |
| 1300 | (defun te-create-termcap () |
| 1301 | "Create a termcap entry for the virtual terminal" |
| 1302 | ;; Because of Unix Brain Death(tm), we can't change |
| 1303 | ;; the terminal type of a running process, and so |
| 1304 | ;; terminal size and scrollability are wired-down |
| 1305 | ;; at this point. ("Detach? What's that?") |
| 1306 | (concat (format "%s:co#%d:li#%d:%s" |
| 1307 | ;; Sigh. These can't be dynamically changed. |
| 1308 | te-terminal-name te-width te-height (if terminal-scrolling |
| 1309 | "" "ns:")) |
| 1310 | ;;-- Basic things |
| 1311 | ;; cursor-motion, bol, forward/backward char |
| 1312 | "cm=^p=%+ %+ :cr=^p^a:le=^p^b:nd=^p^f:" |
| 1313 | ;; newline, clear eof/eof, audible bell |
| 1314 | "nw=^j:ce=^pc:cd=^pC:cl=^p^l:bl=^p^g:" |
| 1315 | ;; insert/delete char/line |
| 1316 | "IC=^p_%+ :DC=^pd%+ :AL=^p^o%+ :DL=^p^k%+ :" |
| 1317 | ;;-- Not-widely-known (ie nonstandard) flags, which mean |
| 1318 | ;; o writing in the last column of the last line |
| 1319 | ;; doesn't cause idiotic scrolling, and |
| 1320 | ;; o don't use idiotische c-s/c-q sogenannte |
| 1321 | ;; ``flow control'' auf keinen Fall. |
| 1322 | "LP:NF:" |
| 1323 | ;;-- For stupid or obsolete programs |
| 1324 | "ic=^p_!:dc=^pd!:al=^p^o!:dl=^p^k!:ho=^p= :" |
| 1325 | ;;-- For disgusting programs. |
| 1326 | ;; (VI? What losers need these, I wonder?) |
| 1327 | "im=:ei=:dm=:ed=:mi:do=^p^j:nl=^p^j:bs:") |
| 1328 | ) |
| 1329 | |
| 1330 | (defun te-tic-sentinel (_proc state-change) |
| 1331 | "If tic has finished, delete the .tif file" |
| 1332 | (if (equal state-change "finished |
| 1333 | ") |
| 1334 | (delete-file (concat te-terminfo-directory te-terminal-name ".tif")))) |
| 1335 | |
| 1336 | (provide 'terminal) |
| 1337 | |
| 1338 | ;;; terminal.el ends here |