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55535639 | 1 | ;;; terminal.el --- terminal emulator for GNU Emacs |
d501f516 | 2 | |
c90f2757 | 3 | ;; Copyright (C) 1986, 1987, 1988, 1989, 1993, 1994, 2001, 2002, 2003, |
409cc4a3 | 4 | ;; 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
eea8d4ef | 5 | |
e5167999 ER |
6 | ;; Author: Richard Mlynarik <mly@eddie.mit.edu> |
7 | ;; Maintainer: FSF | |
e9571d2a | 8 | ;; Keywords: comm, terminals |
424751de | 9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
424751de | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
424751de | 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 | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
424751de | 24 | |
8545ff2f KH |
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 | ||
e5167999 ER |
36 | ;;; Code: |
37 | ||
424751de | 38 | ;;>>TODO |
424751de | 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 | ||
424751de | 45 | (require 'ehelp) |
46 | ||
bdd8ea0b RS |
47 | (defgroup terminal nil |
48 | "Terminal emulator for Emacs." | |
49 | :group 'terminals) | |
50 | ||
51 | ||
52 | (defcustom terminal-escape-char ?\C-^ | |
9201cc28 | 53 | "All characters except for this are passed verbatim through the |
424751de | 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. | |
bdd8ea0b RS |
58 | This variable is local to each terminal-emulator buffer." |
59 | :type 'character | |
60 | :group 'terminal) | |
424751de | 61 | |
f0529b5b | 62 | (defcustom terminal-scrolling t ;;>> Setting this to t sort-of defeats my whole aim in writing this package... |
9201cc28 | 63 | "If non-nil, the terminal-emulator will losingly `scroll' when output occurs |
424751de | 64 | past the bottom of the screen. If nil, output will win and `wrap' to the top |
65 | of the screen. | |
bdd8ea0b RS |
66 | This variable is local to each terminal-emulator buffer." |
67 | :type 'boolean | |
68 | :group 'terminal) | |
424751de | 69 | |
bdd8ea0b | 70 | (defcustom terminal-more-processing t |
9201cc28 | 71 | "If non-nil, do more-processing. |
bdd8ea0b RS |
72 | This variable is local to each terminal-emulator buffer." |
73 | :type 'boolean | |
74 | :group 'terminal) | |
424751de | 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 | |
bdd8ea0b | 79 | (defcustom terminal-redisplay-interval 5000 |
9201cc28 | 80 | "Maximum number of characters which will be processed by the |
424751de | 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 | |
bdd8ea0b RS |
84 | performance." |
85 | :type 'integer | |
86 | :group 'terminal) | |
424751de | 87 | |
88 | (defvar terminal-more-break-insertion | |
89 | "*** More break -- Press space to continue ***") | |
90 | ||
d3f7c8c6 RS |
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 | ||
424751de | 98 | (defvar terminal-map nil) |
424751de | 99 | (if terminal-map |
100 | nil | |
d3f7c8c6 | 101 | (let ((map (make-sparse-keymap))) |
d05ea5b1 RS |
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)) | |
d3f7c8c6 | 105 | (define-key map [t] 'te-pass-through) |
c2ae679c | 106 | (define-key map [switch-frame] 'handle-switch-frame) |
d3f7c8c6 | 107 | (define-key map "\e" terminal-meta-map) |
424751de | 108 | ;(define-key map "\C-l" |
109 | ; '(lambda () (interactive) (te-pass-through) (redraw-display))) | |
110 | (setq terminal-map map))) | |
111 | ||
54f91c5b | 112 | (defvar terminal-escape-map nil) |
424751de | 113 | (if terminal-escape-map |
114 | nil | |
d3f7c8c6 RS |
115 | (let ((map (make-sparse-keymap))) |
116 | (define-key map [t] 'undefined) | |
424751de | 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 | ||
54f91c5b | 134 | (defvar te-escape-command-alist nil) |
424751de | 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 | ||
54f91c5b | 158 | (defvar terminal-more-break-map nil) |
424751de | 159 | (if terminal-more-break-map |
160 | nil | |
d3f7c8c6 RS |
161 | (let ((map (make-sparse-keymap))) |
162 | (define-key map [t] 'te-more-break-unread) | |
424751de | 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))) | |
cce2176a | 172 | |
424751de | 173 | \f |
54f91c5b ER |
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 | ||
398e98d1 | 189 | ;; Required to support terminfo systems |
099cffd4 RS |
190 | (defconst te-terminal-name-prefix "emacs-em" |
191 | "Prefix used for terminal type names for Terminfo.") | |
0492dd4a RS |
192 | (defconst te-terminfo-directory |
193 | (file-name-as-directory | |
194 | (expand-file-name "emacs-terminfo" temporary-file-directory)) | |
099cffd4 | 195 | "Directory used for run-time terminal definition files for Terminfo.") |
398e98d1 | 196 | (defvar te-terminal-name nil) |
54f91c5b | 197 | \f |
424751de | 198 | ;;;; escape map |
199 | ||
200 | (defun te-escape () | |
201 | (interactive) | |
cce2176a | 202 | (let (s |
be934b53 KH |
203 | (local (current-local-map)) |
204 | (global (current-global-map))) | |
424751de | 205 | (unwind-protect |
be934b53 KH |
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 | |
0721fbe3 EZ |
211 | (format "Emacs Terminal escape[%s for help]> %d " |
212 | (substitute-command-keys | |
213 | "\\<terminal-escape-map>\\[te-escape-help]") | |
be934b53 | 214 | (prefix-numeric-value current-prefix-arg)) |
0721fbe3 EZ |
215 | (format "Emacs Terminal escape[%s for help]> " |
216 | (substitute-command-keys | |
217 | "\\<terminal-escape-map>\\[te-escape-help]")))))) | |
424751de | 218 | (use-global-map global) |
219 | (use-local-map local)) | |
be934b53 | 220 | |
424751de | 221 | (message "") |
be934b53 | 222 | |
cce2176a | 223 | (cond |
be934b53 KH |
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-char 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 | ||
424751de | 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 | |
bc69c9c2 | 254 | terminal-escape-map t) |
424751de | 255 | 'te-escape-extended-command)) |
d05ea5b1 RS |
256 | (let ((l (sort (copy-sequence te-escape-command-alist) |
257 | (function (lambda (a b) | |
258 | (string< (car a) (car b))))))) | |
424751de | 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 | ||
cce2176a | 273 | |
424751de | 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) | |
383aee86 | 293 | (setq unread-command-events (listify-key-sequence (this-command-keys))) |
424751de | 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) | |
e2a2f845 RS |
301 | "\"%s\" is the escape char" |
302 | "\"%s\" is now the escape; \"%s\" passes through") | |
424751de | 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 | (save-excursion | |
330 | (set-buffer (get-buffer-create name)) | |
331 | (fundamental-mode) | |
332 | (buffer-disable-undo (current-buffer)) | |
333 | (erase-buffer))) | |
334 | (setq te-log-buffer (get-buffer name)) | |
335 | (message "Recording terminal emulator output into buffer \"%s\"" | |
336 | (buffer-name te-log-buffer)))) | |
337 | ||
338 | (defun te-tofu () | |
339 | "Discontinue output log." | |
340 | (interactive) | |
341 | (te-set-output-log nil)) | |
cce2176a | 342 | |
424751de | 343 | |
344 | (defun te-toggle (sym arg) | |
345 | (set sym (cond ((not (numberp arg)) arg) | |
346 | ((= arg 1) (not (symbol-value sym))) | |
347 | ((< arg 0) nil) | |
348 | (t t)))) | |
349 | ||
350 | (defun te-toggle-more-processing (arg) | |
351 | (interactive "p") | |
352 | (message (if (te-toggle 'terminal-more-processing arg) | |
353 | "More processing on" "More processing off")) | |
354 | (if terminal-more-processing (setq te-more-count -1))) | |
355 | ||
356 | (defun te-toggle-scrolling (arg) | |
357 | (interactive "p") | |
358 | (message (if (te-toggle 'terminal-scrolling arg) | |
359 | "Scroll at end of page" "Wrap at end of page"))) | |
360 | ||
361 | (defun te-enable-more-processing () | |
362 | "Enable ** MORE ** processing" | |
363 | (interactive) | |
364 | (te-toggle-more-processing t)) | |
365 | ||
366 | (defun te-disable-more-processing () | |
367 | "Disable ** MORE ** processing" | |
368 | (interactive) | |
369 | (te-toggle-more-processing nil)) | |
370 | ||
371 | (defun te-do-scrolling () | |
372 | "Scroll at end of page (yuck)" | |
373 | (interactive) | |
374 | (te-toggle-scrolling t)) | |
375 | ||
376 | (defun te-do-wrapping () | |
377 | "Wrap to top of window at end of page" | |
378 | (interactive) | |
379 | (te-toggle-scrolling nil)) | |
380 | ||
381 | ||
382 | (defun te-set-redisplay-interval (arg) | |
383 | "Set the maximum interval (in output characters) between screen updates. | |
384 | Set this number to large value for greater throughput, | |
385 | set it smaller for more frequent updates (but overall slower performance." | |
386 | (interactive "NMax number of output chars between redisplay updates: ") | |
387 | (setq arg (max arg 1)) | |
388 | (setq terminal-redisplay-interval arg | |
389 | te-redisplay-count 0)) | |
390 | \f | |
391 | ;;;; more map | |
392 | ||
393 | ;; every command -must- call te-more-break-unwind | |
394 | ;; or grave lossage will result | |
395 | ||
396 | (put 'te-more-break-unread 'suppress-keymap t) | |
397 | (defun te-more-break-unread () | |
398 | (interactive) | |
d3f7c8c6 | 399 | (if (eq last-input-char terminal-escape-char) |
424751de | 400 | (call-interactively 'te-escape) |
401 | (message "Continuing from more break (\"%s\" typed, %d chars output pending...)" | |
402 | (single-key-description last-input-char) | |
403 | (te-pending-output-length)) | |
404 | (setq te-more-count 259259) | |
405 | (te-more-break-unwind) | |
406 | (let ((terminal-more-processing nil)) | |
407 | (te-pass-through)))) | |
408 | ||
409 | (defun te-more-break-resume () | |
410 | "Proceed past the **MORE** break, | |
411 | allowing the next page of output to appear" | |
412 | (interactive) | |
413 | (message "Continuing from more break") | |
414 | (te-more-break-unwind)) | |
415 | ||
416 | (defun te-more-break-help () | |
417 | "Provide help on commands available in a terminal-emulator **MORE** break" | |
418 | (interactive) | |
419 | (message "Terminal-emulator more break help...") | |
420 | (sit-for 0) | |
421 | (with-electric-help | |
422 | (function (lambda () | |
423 | (princ "Terminal-emulator more break.\n\n") | |
424 | (princ (format "Type \"%s\" (te-more-break-resume)\n%s\n" | |
425 | (where-is-internal 'te-more-break-resume | |
bc69c9c2 | 426 | terminal-more-break-map t) |
424751de | 427 | (documentation 'te-more-break-resume))) |
428 | (princ (substitute-command-keys "\\{terminal-more-break-map}\n")) | |
429 | (princ "Any other key is passed through to the program | |
430 | running under the terminal emulator and disables more processing until | |
431 | all pending output has been dealt with.") | |
432 | nil)))) | |
433 | ||
434 | ||
435 | (defun te-more-break-advance-one-line () | |
436 | "Allow one more line of text to be output before doing another more break." | |
437 | (interactive) | |
438 | (setq te-more-count 1) | |
439 | (te-more-break-unwind)) | |
440 | ||
441 | (defun te-more-break-flush-pending-output () | |
442 | "Discard any output which has been received by the terminal emulator but | |
eb8c3be9 | 443 | not yet processed and then proceed from the more break." |
424751de | 444 | (interactive) |
445 | (te-more-break-unwind) | |
446 | (te-flush-pending-output)) | |
447 | ||
448 | (defun te-flush-pending-output () | |
449 | "Discard any as-yet-unprocessed output which has been received by | |
450 | the terminal emulator." | |
451 | (interactive) | |
452 | ;; this could conceivably be confusing in the presence of | |
453 | ;; escape-sequences spanning process-output chunks | |
454 | (if (null (cdr te-pending-output)) | |
455 | (message "(There is no output pending)") | |
456 | (let ((length (te-pending-output-length))) | |
457 | (message "Flushing %d chars of pending output" length) | |
458 | (setq te-pending-output | |
459 | (list 0 (format "\n*** %d chars of pending output flushed ***\n" | |
460 | length))) | |
461 | (te-update-pending-output-display) | |
462 | (te-process-output nil) | |
463 | (sit-for 0)))) | |
464 | ||
465 | \f | |
466 | (defun te-pass-through () | |
467 | "Character is passed to the program running under the terminal emulator. | |
468 | One characters is treated specially: | |
469 | the terminal escape character (normally C-^) | |
470 | lets you type a terminal emulator command." | |
471 | (interactive) | |
d3f7c8c6 | 472 | (cond ((eq last-input-char terminal-escape-char) |
424751de | 473 | (call-interactively 'te-escape)) |
474 | (t | |
cce2176a | 475 | ;; Convert `return' to C-m, etc. |
d3f7c8c6 RS |
476 | (if (and (symbolp last-input-char) |
477 | (get last-input-char 'ascii-character)) | |
478 | (setq last-input-char (get last-input-char 'ascii-character))) | |
479 | ;; Convert meta characters to 8-bit form for transmission. | |
480 | (if (and (integerp last-input-char) | |
9f5787ae | 481 | (not (zerop (logand last-input-char ?\M-\^@)))) |
d3f7c8c6 | 482 | (setq last-input-char (+ 128 (logand last-input-char 127)))) |
d3f7c8c6 RS |
483 | ;; Now ignore all but actual characters. |
484 | ;; (It ought to be possible to send through function | |
485 | ;; keys as character sequences if we add a description | |
486 | ;; to our termcap entry of what they should look like.) | |
487 | (if (integerp last-input-char) | |
488 | (progn | |
489 | (and terminal-more-processing (null (cdr te-pending-output)) | |
490 | (te-set-more-count nil)) | |
ff660307 | 491 | (process-send-string te-process (make-string 1 last-input-char)) |
d3f7c8c6 RS |
492 | (te-process-output t)) |
493 | (message "Function key `%s' ignored" | |
494 | (single-key-description last-input-char)))))) | |
424751de | 495 | |
496 | ||
497 | (defun te-set-window-start () | |
498 | (let* ((w (get-buffer-window (current-buffer))) | |
499 | (h (if w (window-height w)))) | |
500 | (cond ((not w)) ; buffer not displayed | |
501 | ((>= h (/ (- (point) (point-min)) (1+ te-width))) | |
502 | ;; this is the normal case | |
503 | (set-window-start w (point-min))) | |
504 | ;; this happens if some vandal shrinks our window. | |
505 | ((>= h (/ (- (point-max) (point)) (1+ te-width))) | |
506 | (set-window-start w (- (point-max) (* h (1+ te-width)) -1))) | |
507 | ;; I give up. | |
508 | (t nil)))) | |
509 | ||
510 | (defun te-pending-output-length () | |
511 | (let ((length (car te-pending-output)) | |
512 | (tem (cdr te-pending-output))) | |
513 | (while tem | |
514 | (setq length (+ length (length (car tem))) tem (cdr tem))) | |
515 | length)) | |
516 | \f | |
517 | ;;>> What use is this terminal-edit stuff anyway? | |
518 | ;;>> If nothing else, it was written by somebody who didn't | |
519 | ;;>> competently understand the terminal-emulator... | |
520 | ||
521 | (defvar terminal-edit-map nil) | |
522 | (if terminal-edit-map | |
523 | nil | |
524 | (setq terminal-edit-map (make-sparse-keymap)) | |
525 | (define-key terminal-edit-map "\C-c\C-c" 'terminal-cease-edit)) | |
526 | ||
527 | ;; Terminal Edit mode is suitable only for specially formatted data. | |
528 | (put 'terminal-edit-mode 'mode-class 'special) | |
529 | ||
530 | (defun terminal-edit-mode () | |
531 | "Major mode for editing the contents of a terminal-emulator buffer. | |
532 | The editing commands are the same as in Fundamental mode, | |
75a6b98e | 533 | together with a command \\<terminal-edit-map>to return to terminal emulation: \\[terminal-cease-edit]." |
424751de | 534 | (use-local-map terminal-edit-map) |
535 | (setq major-mode 'terminal-edit-mode) | |
536 | (setq mode-name "Terminal Edit") | |
537 | (setq mode-line-modified (default-value 'mode-line-modified)) | |
538 | (setq mode-line-process nil) | |
caaaa40e | 539 | (run-mode-hooks 'terminal-edit-mode-hook)) |
424751de | 540 | |
541 | (defun te-edit () | |
542 | "Start editing the terminal emulator buffer with ordinary Emacs commands." | |
543 | (interactive) | |
544 | (terminal-edit-mode) | |
d3a4a986 | 545 | (force-mode-line-update) |
424751de | 546 | ;; Make mode line update. |
547 | (if (eq (key-binding "\C-c\C-c") 'terminal-cease-edit) | |
548 | (message "Editing: Type C-c C-c to return to Terminal") | |
8ea884c3 KH |
549 | (message "%s" |
550 | (substitute-command-keys | |
424751de | 551 | "Editing: Type \\[terminal-cease-edit] to return to Terminal")))) |
552 | ||
553 | (defun terminal-cease-edit () | |
554 | "Finish editing message; switch back to Terminal proper." | |
555 | (interactive) | |
556 | ||
557 | ;;>> emulator will blow out if buffer isn't exactly te-width x te-height | |
558 | (let ((buffer-read-only nil)) | |
559 | (widen) | |
560 | (let ((opoint (point-marker)) | |
561 | (width te-width) | |
562 | (h (1- te-height))) | |
563 | (goto-char (point-min)) | |
564 | (while (>= h 0) | |
565 | (let ((p (point))) | |
566 | (cond ((search-forward "\n" (+ p width) 'move) | |
567 | (forward-char -1) | |
37437fb5 | 568 | (insert-char ?\s (- width (- (point) p))) |
424751de | 569 | (forward-char 1)) |
570 | ((eobp) | |
37437fb5 | 571 | (insert-char ?\s (- width (- (point) p)))) |
424751de | 572 | ((= (following-char) ?\n) |
573 | (forward-char 1)) | |
574 | (t | |
575 | (setq p (point)) | |
576 | (if (search-forward "\n" nil t) | |
577 | (delete-region p (1- (point))) | |
578 | (delete-region p (point-max)))))) | |
579 | (if (= h 0) | |
580 | (if (not (eobp)) (delete-region (point) (point-max))) | |
581 | (if (eobp) (insert ?\n))) | |
582 | (setq h (1- h))) | |
583 | (goto-char opoint) | |
584 | (set-marker opoint nil nil) | |
585 | (setq te-saved-point (point)) | |
586 | (setq te-redisplay-count 0) | |
587 | (setq te-more-count -1))) | |
588 | ||
589 | (setq mode-line-modified (default-value 'mode-line-modified)) | |
75a6b98e | 590 | (use-local-map terminal-map) |
424751de | 591 | (setq major-mode 'terminal-mode) |
592 | (setq mode-name "terminal") | |
b11e1526 | 593 | (setq mode-line-process '(":%s"))) |
424751de | 594 | \f |
595 | ;;;; more break hair | |
596 | ||
597 | (defun te-more-break () | |
598 | (te-set-more-count t) | |
599 | (make-local-variable 'te-more-old-point) | |
600 | (setq te-more-old-point (point)) | |
601 | (make-local-variable 'te-more-old-local-map) | |
602 | (setq te-more-old-local-map (current-local-map)) | |
603 | (use-local-map terminal-more-break-map) | |
604 | (make-local-variable 'te-more-old-filter) | |
605 | (setq te-more-old-filter (process-filter te-process)) | |
606 | (make-local-variable 'te-more-old-mode-line-format) | |
607 | (setq te-more-old-mode-line-format mode-line-format | |
608 | mode-line-format (list "-- **MORE** " | |
609 | mode-line-buffer-identification | |
610 | "%-")) | |
611 | (set-process-filter te-process | |
612 | (function (lambda (process string) | |
613 | (save-excursion | |
614 | (set-buffer (process-buffer process)) | |
615 | (setq te-pending-output (nconc te-pending-output | |
616 | (list string)))) | |
617 | (te-update-pending-output-display)))) | |
618 | (te-update-pending-output-display) | |
619 | (if (eq (window-buffer (selected-window)) (current-buffer)) | |
620 | (message "More break ")) | |
621 | (or (eobp) | |
622 | (null terminal-more-break-insertion) | |
623 | (save-excursion | |
624 | (forward-char 1) | |
625 | (delete-region (point) (+ (point) te-width)) | |
626 | (insert terminal-more-break-insertion))) | |
627 | (run-hooks 'terminal-more-break-hook) | |
628 | (sit-for 0) ;get display to update | |
629 | (throw 'te-process-output t)) | |
630 | ||
631 | (defun te-more-break-unwind () | |
632 | (use-local-map te-more-old-local-map) | |
633 | (set-process-filter te-process te-more-old-filter) | |
634 | (goto-char te-more-old-point) | |
635 | (setq mode-line-format te-more-old-mode-line-format) | |
d3a4a986 | 636 | (force-mode-line-update) |
424751de | 637 | (let ((buffer-read-only nil)) |
638 | (cond ((eobp)) | |
639 | (terminal-more-break-insertion | |
640 | (forward-char 1) | |
641 | (delete-region (point) | |
642 | (+ (point) (length terminal-more-break-insertion))) | |
37437fb5 | 643 | (insert-char ?\s te-width) |
424751de | 644 | (goto-char te-more-old-point))) |
645 | (setq te-more-old-point nil) | |
646 | (let ((te-more-count 259259)) | |
647 | (te-newline))) | |
648 | ;(sit-for 0) | |
649 | (te-process-output t)) | |
650 | ||
651 | (defun te-set-more-count (newline) | |
652 | (let ((line (/ (- (point) (point-min)) (1+ te-width)))) | |
653 | (if newline (setq line (1+ line))) | |
654 | (cond ((= line te-height) | |
655 | (setq te-more-count te-height)) | |
656 | ;>>>> something is strange. Investigate this! | |
657 | ((= line (1- te-height)) | |
658 | (setq te-more-count te-height)) | |
659 | ((or (< line (/ te-height 2)) | |
660 | (> (- te-height line) 10)) | |
661 | ;; break at end of this page | |
662 | (setq te-more-count (- te-height line))) | |
663 | (t | |
664 | ;; migrate back towards top (ie bottom) of screen. | |
665 | (setq te-more-count (- te-height | |
666 | (if (> te-height 10) 2 1))))))) | |
667 | ||
668 | \f | |
669 | ;;;; More or less straight-forward terminal escapes | |
670 | ||
671 | ;; ^j, meaning `newline' to non-display programs. | |
672 | ;; (Who would think of ever writing a system which doesn't understand | |
673 | ;; display terminals natively? Un*x: The Operating System of the Future.) | |
674 | (defun te-newline () | |
675 | "Move down a line, optionally do more processing, perhaps wrap/scroll, | |
676 | move to start of new line, clear to end of line." | |
677 | (end-of-line) | |
678 | (cond ((not terminal-more-processing)) | |
679 | ((< (setq te-more-count (1- te-more-count)) 0) | |
680 | (te-set-more-count t)) | |
1ea0c057 | 681 | ((eq te-more-count 0) |
424751de | 682 | ;; this doesn't return |
683 | (te-more-break))) | |
684 | (if (eobp) | |
685 | (progn | |
686 | (delete-region (point-min) (+ (point-min) te-width)) | |
687 | (goto-char (point-min)) | |
688 | (if terminal-scrolling | |
689 | (progn (delete-char 1) | |
690 | (goto-char (point-max)) | |
691 | (insert ?\n)))) | |
692 | (forward-char 1) | |
693 | (delete-region (point) (+ (point) te-width))) | |
37437fb5 | 694 | (insert-char ?\s te-width) |
424751de | 695 | (beginning-of-line) |
696 | (te-set-window-start)) | |
697 | ||
698 | ; ^p = x+32 y+32 | |
699 | (defun te-move-to-position () | |
700 | ;; must offset by #o40 since cretinous unix won't send a 004 char through | |
701 | (let ((y (- (te-get-char) 32)) | |
702 | (x (- (te-get-char) 32))) | |
703 | (if (or (> x te-width) | |
704 | (> y te-height)) | |
705 | () | |
706 | (goto-char (+ (point-min) x (* y (1+ te-width)))) | |
707 | ;(te-set-window-start?) | |
708 | )) | |
709 | (setq te-more-count -1)) | |
710 | ||
711 | ||
712 | ||
713 | ;; ^p c | |
714 | (defun te-clear-rest-of-line () | |
715 | (save-excursion | |
716 | (let ((n (- (point) (progn (end-of-line) (point))))) | |
717 | (delete-region (point) (+ (point) n)) | |
37437fb5 | 718 | (insert-char ?\s (- n))))) |
424751de | 719 | |
720 | ||
721 | ;; ^p C | |
722 | (defun te-clear-rest-of-screen () | |
723 | (save-excursion | |
724 | (te-clear-rest-of-line) | |
725 | (while (progn (end-of-line) (not (eobp))) | |
726 | (forward-char 1) (end-of-line) | |
727 | (delete-region (- (point) te-width) (point)) | |
37437fb5 | 728 | (insert-char ?\s te-width)))) |
cce2176a | 729 | |
424751de | 730 | |
731 | ;; ^p ^l | |
732 | (defun te-clear-screen () | |
733 | ;; regenerate buffer to compensate for (nonexistent!!) bugs. | |
734 | (erase-buffer) | |
735 | (let ((i 0)) | |
736 | (while (< i te-height) | |
737 | (setq i (1+ i)) | |
37437fb5 | 738 | (insert-char ?\s te-width) |
424751de | 739 | (insert ?\n))) |
740 | (delete-region (1- (point-max)) (point-max)) | |
741 | (goto-char (point-min)) | |
742 | (setq te-more-count -1)) | |
743 | ||
744 | ||
745 | ;; ^p ^o count+32 | |
746 | (defun te-insert-lines () | |
747 | (if (not (bolp)) | |
748 | ();(error "fooI") | |
749 | (save-excursion | |
750 | (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1)) | |
37437fb5 | 751 | (n (min (- (te-get-char) ?\s) line)) |
424751de | 752 | (i 0)) |
753 | (delete-region (- (point-max) (* n (1+ te-width))) (point-max)) | |
1ea0c057 | 754 | (if (eq (point) (point-max)) (insert ?\n)) |
424751de | 755 | (while (< i n) |
756 | (setq i (1+ i)) | |
37437fb5 | 757 | (insert-char ?\s te-width) |
1ea0c057 | 758 | (or (eq i line) (insert ?\n)))))) |
424751de | 759 | (setq te-more-count -1)) |
760 | ||
761 | ||
762 | ;; ^p ^k count+32 | |
763 | (defun te-delete-lines () | |
764 | (if (not (bolp)) | |
765 | ();(error "fooD") | |
766 | (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1)) | |
37437fb5 | 767 | (n (min (- (te-get-char) ?\s) line)) |
424751de | 768 | (i 0)) |
769 | (delete-region (point) | |
770 | (min (+ (point) (* n (1+ te-width))) (point-max))) | |
771 | (save-excursion | |
772 | (goto-char (point-max)) | |
773 | (while (< i n) | |
774 | (setq i (1+ i)) | |
37437fb5 | 775 | (insert-char ?\s te-width) |
1ea0c057 | 776 | (or (eq i line) (insert ?\n)))))) |
424751de | 777 | (setq te-more-count -1)) |
778 | ||
779 | ;; ^p ^a | |
780 | (defun te-beginning-of-line () | |
781 | (beginning-of-line)) | |
782 | ||
783 | ;; ^p ^b | |
784 | (defun te-backward-char () | |
785 | (if (not (bolp)) | |
786 | (backward-char 1))) | |
787 | ||
788 | ;; ^p ^f | |
789 | (defun te-forward-char () | |
790 | (if (not (eolp)) | |
791 | (forward-char 1))) | |
792 | ||
793 | \f | |
794 | ;; 0177 | |
795 | (defun te-delete () | |
796 | (if (bolp) | |
797 | () | |
798 | (delete-region (1- (point)) (point)) | |
37437fb5 | 799 | (insert ?\s) |
424751de | 800 | (forward-char -1))) |
801 | ||
802 | ;; ^p ^g | |
803 | (defun te-beep () | |
804 | (beep)) | |
805 | ||
806 | ||
807 | ;; ^p _ count+32 | |
808 | (defun te-insert-spaces () | |
809 | (let* ((p (point)) | |
810 | (n (min (- (te-get-char) 32) | |
811 | (- (progn (end-of-line) (point)) p)))) | |
812 | (if (<= n 0) | |
813 | nil | |
814 | (delete-char (- n)) | |
815 | (goto-char p) | |
37437fb5 | 816 | (insert-char ?\s n)) |
424751de | 817 | (goto-char p))) |
818 | ||
819 | ;; ^p d count+32 (should be ^p ^d but cretinous un*x won't send ^d chars!!!) | |
820 | (defun te-delete-char () | |
821 | (let* ((p (point)) | |
822 | (n (min (- (te-get-char) 32) | |
823 | (- (progn (end-of-line) (point)) p)))) | |
824 | (if (<= n 0) | |
825 | nil | |
37437fb5 | 826 | (insert-char ?\s n) |
424751de | 827 | (goto-char p) |
828 | (delete-char n)) | |
829 | (goto-char p))) | |
830 | ||
831 | ||
832 | \f | |
8545ff2f | 833 | ;; disgusting unix-required excrement |
424751de | 834 | ;; Are we living twenty years in the past yet? |
835 | ||
836 | (defun te-losing-unix () | |
837 | nil) | |
838 | ||
839 | ;; ^i | |
840 | (defun te-output-tab () | |
841 | (let* ((p (point)) | |
842 | (x (- p (progn (beginning-of-line) (point)))) | |
843 | (l (min (- 8 (logand x 7)) | |
844 | (progn (end-of-line) (- (point) p))))) | |
845 | (goto-char (+ p l)))) | |
846 | ||
847 | ;; ^p ^j | |
848 | ;; Handle the `do' or `nl' termcap capability. | |
849 | ;;>> I am not sure why this broken, obsolete, capability is here. | |
850 | ;;>> Perhaps it is for VIle. No comment was made about why it | |
851 | ;;>> was added (in "Sun Dec 6 01:22:27 1987 Richard Stallman") | |
852 | (defun te-down-vertically-or-scroll () | |
853 | "Move down a line vertically, or scroll at bottom." | |
854 | (let ((column (current-column))) | |
855 | (end-of-line) | |
856 | (if (eobp) | |
857 | (progn | |
858 | (delete-region (point-min) (+ (point-min) te-width)) | |
859 | (goto-char (point-min)) | |
860 | (delete-char 1) | |
861 | (goto-char (point-max)) | |
862 | (insert ?\n) | |
37437fb5 | 863 | (insert-char ?\s te-width) |
424751de | 864 | (beginning-of-line)) |
865 | (forward-line 1)) | |
866 | (move-to-column column)) | |
867 | (te-set-window-start)) | |
868 | ||
869 | ;; Also: | |
870 | ;; ^m => beginning-of-line (for which it -should- be using ^p ^a, right?!!) | |
871 | ;; ^g => te-beep (for which it should use ^p ^g) | |
872 | ;; ^h => te-backward-char (for which it should use ^p ^b) | |
873 | ||
874 | \f | |
875 | ||
876 | (defun te-filter (process string) | |
d3f7c8c6 | 877 | (let* ((obuf (current-buffer))) |
424751de | 878 | ;; can't use save-excursion, as that preserves point, which we don't want |
879 | (unwind-protect | |
880 | (progn | |
881 | (set-buffer (process-buffer process)) | |
882 | (goto-char te-saved-point) | |
883 | (and (bufferp te-log-buffer) | |
884 | (if (null (buffer-name te-log-buffer)) | |
885 | ;; killed | |
886 | (setq te-log-buffer nil) | |
887 | (set-buffer te-log-buffer) | |
888 | (goto-char (point-max)) | |
889 | (insert-before-markers string) | |
890 | (set-buffer (process-buffer process)))) | |
891 | (setq te-pending-output (nconc te-pending-output (list string))) | |
892 | (te-update-pending-output-display) | |
d3f7c8c6 RS |
893 | (te-process-output (eq (current-buffer) |
894 | (window-buffer (selected-window)))) | |
424751de | 895 | (set-buffer (process-buffer process)) |
896 | (setq te-saved-point (point))) | |
897 | (set-buffer obuf)))) | |
898 | ||
899 | ;; (A version of the following comment which might be distractingly offensive | |
900 | ;; to some readers has been moved to term-nasty.el.) | |
901 | ;; unix lacks ITS-style tty control... | |
a60704d7 | 902 | (defun te-process-output (preemptible) |
424751de | 903 | ;;>> There seems no good reason to ever disallow preemption |
a60704d7 | 904 | (setq preemptible t) |
424751de | 905 | (catch 'te-process-output |
906 | (let ((buffer-read-only nil) | |
907 | (string nil) ostring start char (matchpos nil)) | |
908 | (while (cdr te-pending-output) | |
909 | (setq ostring string | |
910 | start (car te-pending-output) | |
911 | string (car (cdr te-pending-output)) | |
912 | char (aref string start)) | |
1ea0c057 | 913 | (if (eq (setq start (1+ start)) (length string)) |
424751de | 914 | (progn (setq te-pending-output |
915 | (cons 0 (cdr (cdr te-pending-output))) | |
916 | start 0 | |
917 | string (car (cdr te-pending-output))) | |
918 | (te-update-pending-output-display)) | |
919 | (setcar te-pending-output start)) | |
920 | (if (and (> char ?\037) (< char ?\377)) | |
921 | (cond ((eolp) | |
922 | ;; unread char | |
1ea0c057 | 923 | (if (eq start 0) |
424751de | 924 | (setq te-pending-output |
925 | (cons 0 (cons (make-string 1 char) | |
926 | (cdr te-pending-output)))) | |
927 | (setcar te-pending-output (1- start))) | |
928 | (te-newline)) | |
929 | ((null string) | |
930 | (delete-char 1) (insert char) | |
931 | (te-redisplay-if-necessary 1)) | |
932 | (t | |
933 | (let ((end (or (and (eq ostring string) matchpos) | |
934 | (setq matchpos (string-match | |
935 | "[\000-\037\177-\377]" | |
936 | string start)) | |
937 | (length string)))) | |
938 | (delete-char 1) (insert char) | |
939 | (setq char (point)) (end-of-line) | |
940 | (setq end (min end (+ start (- (point) char)))) | |
941 | (goto-char char) | |
1ea0c057 | 942 | (if (eq end matchpos) (setq matchpos nil)) |
424751de | 943 | (delete-region (point) (+ (point) (- end start))) |
1ea0c057 RS |
944 | (insert (if (and (eq start 0) |
945 | (eq end (length string))) | |
424751de | 946 | string |
947 | (substring string start end))) | |
1ea0c057 | 948 | (if (eq end (length string)) |
424751de | 949 | (setq te-pending-output |
950 | (cons 0 (cdr (cdr te-pending-output)))) | |
951 | (setcar te-pending-output end)) | |
952 | (te-redisplay-if-necessary (1+ (- end start)))))) | |
953 | ;; I suppose if I split the guts of this out into a separate | |
954 | ;; function we could trivially emulate different terminals | |
955 | ;; Who cares in any case? (Apart from stupid losers using rlogin) | |
956 | (funcall | |
1ea0c057 | 957 | (if (eq char ?\^p) |
424751de | 958 | (or (cdr (assq (te-get-char) |
959 | '((?= . te-move-to-position) | |
960 | (?c . te-clear-rest-of-line) | |
961 | (?C . te-clear-rest-of-screen) | |
962 | (?\C-o . te-insert-lines) | |
963 | (?\C-k . te-delete-lines) | |
964 | ;; not necessary, but help sometimes. | |
965 | (?\C-a . te-beginning-of-line) | |
966 | (?\C-b . te-backward-char) | |
967 | ;; should be C-d, but un*x | |
968 | ;; pty's won't send \004 through! | |
969 | ;; Can you believe this? | |
970 | (?d . te-delete-char) | |
971 | (?_ . te-insert-spaces) | |
972 | ;; random | |
973 | (?\C-f . te-forward-char) | |
974 | (?\C-g . te-beep) | |
975 | (?\C-j . te-down-vertically-or-scroll) | |
976 | (?\C-l . te-clear-screen) | |
977 | ))) | |
978 | 'te-losing-unix) | |
979 | (or (cdr (assq char | |
980 | '((?\C-j . te-newline) | |
981 | (?\177 . te-delete) | |
982 | ;; Did I ask to be sent these characters? | |
983 | ;; I don't remember doing so, either. | |
984 | ;; (Perhaps some operating system or | |
985 | ;; other is completely incompetent...) | |
986 | (?\C-m . te-beginning-of-line) | |
cce2176a NF |
987 | (?\C-g . te-beep) |
988 | (?\C-h . te-backward-char) | |
989 | (?\C-i . te-output-tab)))) | |
424751de | 990 | 'te-losing-unix))) |
991 | (te-redisplay-if-necessary 1)) | |
a60704d7 | 992 | (and preemptible |
424751de | 993 | (input-pending-p) |
a60704d7 | 994 | ;; preemptible output! Oh my!! |
424751de | 995 | (throw 'te-process-output t))))) |
996 | ;; We must update window-point in every window displaying our buffer | |
8822bfb6 GM |
997 | (walk-windows (lambda (w) |
998 | (when (and (not (eq w (selected-window))) | |
999 | (eq (window-buffer w) (current-buffer))) | |
1000 | (set-window-point w (point)))))) | |
424751de | 1001 | |
1002 | (defun te-get-char () | |
1003 | (if (cdr te-pending-output) | |
1004 | (let ((start (car te-pending-output)) | |
1005 | (string (car (cdr te-pending-output)))) | |
1006 | (prog1 (aref string start) | |
1ea0c057 | 1007 | (if (eq (setq start (1+ start)) (length string)) |
424751de | 1008 | (setq te-pending-output (cons 0 (cdr (cdr te-pending-output)))) |
1009 | (setcar te-pending-output start)))) | |
1010 | (catch 'char | |
1011 | (let ((filter (process-filter te-process))) | |
1012 | (unwind-protect | |
1013 | (progn | |
1014 | (set-process-filter te-process | |
1015 | (function (lambda (p s) | |
1ea0c057 | 1016 | (or (eq (length s) 1) |
424751de | 1017 | (setq te-pending-output (list 1 s))) |
1018 | (throw 'char (aref s 0))))) | |
1019 | (accept-process-output te-process)) | |
1020 | (set-process-filter te-process filter)))))) | |
1021 | ||
1022 | ||
1023 | (defun te-redisplay-if-necessary (length) | |
1024 | (and (<= (setq te-redisplay-count (- te-redisplay-count length)) 0) | |
1025 | (eq (current-buffer) (window-buffer (selected-window))) | |
1026 | (waiting-for-user-input-p) | |
1027 | (progn (te-update-pending-output-display) | |
1028 | (sit-for 0) | |
1029 | (setq te-redisplay-count terminal-redisplay-interval)))) | |
1030 | ||
1031 | (defun te-update-pending-output-display () | |
1032 | (if (null (cdr te-pending-output)) | |
cce2176a | 1033 | (setq te-pending-output-info "") |
424751de | 1034 | (let ((length (te-pending-output-length))) |
1035 | (if (< length 1500) | |
1036 | (setq te-pending-output-info "") | |
1037 | (setq te-pending-output-info (format "(%dK chars output pending) " | |
1038 | (/ (+ length 512) 1024)))))) | |
d3a4a986 | 1039 | (force-mode-line-update)) |
424751de | 1040 | |
1041 | \f | |
1042 | (defun te-sentinel (process message) | |
1043 | (cond ((eq (process-status process) 'run)) | |
1044 | ((null (buffer-name (process-buffer process)))) ;deleted | |
1045 | (t (let ((b (current-buffer))) | |
1046 | (save-excursion | |
1047 | (set-buffer (process-buffer process)) | |
1048 | (setq buffer-read-only nil) | |
1049 | (fundamental-mode) | |
1050 | (goto-char (point-max)) | |
1051 | (delete-blank-lines) | |
1052 | (delete-horizontal-space) | |
1053 | (insert "\n*******\n" message "*******\n")) | |
1054 | (if (and (eq b (process-buffer process)) | |
1055 | (waiting-for-user-input-p)) | |
1056 | (progn (goto-char (point-max)) | |
1057 | (recenter -1))))))) | |
1058 | \f | |
d3f7c8c6 | 1059 | (defvar te-stty-string "stty -nl erase '^?' kill '^u' intr '^c' echo pass8" |
0f79a4ae JB |
1060 | "Shell command to set terminal modes for terminal emulator.") |
1061 | ;; This used to have `new' in it, but that loses outside BSD | |
1062 | ;; and it's apparently not needed in BSD. | |
424751de | 1063 | |
bdd8ea0b | 1064 | (defcustom explicit-shell-file-name nil |
9201cc28 | 1065 | "If non-nil, is file name to use for explicitly requested inferior shell." |
bdd8ea0b RS |
1066 | :type '(choice (const :tag "None" nil) |
1067 | file) | |
1068 | :group 'terminal) | |
424751de | 1069 | |
7229064d | 1070 | ;;;###autoload |
424751de | 1071 | (defun terminal-emulator (buffer program args &optional width height) |
1072 | "Under a display-terminal emulator in BUFFER, run PROGRAM on arguments ARGS. | |
1073 | ARGS is a list of argument-strings. Remaining arguments are WIDTH and HEIGHT. | |
1074 | BUFFER's contents are made an image of the display generated by that program, | |
1075 | and any input typed when BUFFER is the current Emacs buffer is sent to that | |
73b7a922 | 1076 | program as keyboard input. |
424751de | 1077 | |
1078 | Interactively, BUFFER defaults to \"*terminal*\" and PROGRAM and ARGS | |
1079 | are parsed from an input-string using your usual shell. | |
1080 | WIDTH and HEIGHT are determined from the size of the current window | |
1081 | -- WIDTH will be one less than the window's width, HEIGHT will be its height. | |
1082 | ||
1083 | To switch buffers and leave the emulator, or to give commands | |
1084 | to the emulator itself (as opposed to the program running under it), | |
1085 | type Control-^. The following character is an emulator command. | |
1086 | Type Control-^ twice to send it to the subprogram. | |
1087 | This escape character may be changed using the variable `terminal-escape-char'. | |
1088 | ||
1089 | `Meta' characters may not currently be sent through the terminal emulator. | |
1090 | ||
e5e4c6a1 | 1091 | Here is a list of some of the variables which control the behavior |
424751de | 1092 | of the emulator -- see their documentation for more information: |
1093 | terminal-escape-char, terminal-scrolling, terminal-more-processing, | |
1094 | terminal-redisplay-interval. | |
1095 | ||
1096 | This function calls the value of terminal-mode-hook if that exists | |
1097 | and is non-nil after the terminal buffer has been set up and the | |
398e98d1 | 1098 | subprocess started." |
424751de | 1099 | (interactive |
1100 | (cons (save-excursion | |
1101 | (set-buffer (get-buffer-create "*terminal*")) | |
1102 | (buffer-name (if (or (not (boundp 'te-process)) | |
1103 | (null te-process) | |
1104 | (not (eq (process-status te-process) | |
1105 | 'run))) | |
1106 | (current-buffer) | |
1107 | (generate-new-buffer "*terminal*")))) | |
1108 | (append | |
1109 | (let* ((default-s | |
1110 | ;; Default shell is same thing M-x shell uses. | |
1111 | (or explicit-shell-file-name | |
1112 | (getenv "ESHELL") | |
1113 | (getenv "SHELL") | |
1114 | "/bin/sh")) | |
1115 | (s (read-string | |
5b76833f | 1116 | (format "Run program in emulator (default %s): " |
424751de | 1117 | default-s)))) |
1118 | (if (equal s "") | |
1119 | (list default-s '()) | |
1120 | (te-parse-program-and-args s)))))) | |
1121 | (switch-to-buffer buffer) | |
1122 | (if (null width) (setq width (- (window-width (selected-window)) 1))) | |
1123 | (if (null height) (setq height (- (window-height (selected-window)) 1))) | |
1124 | (terminal-mode) | |
1125 | (setq te-width width te-height height) | |
b01cef47 KH |
1126 | (setq te-terminal-name (concat te-terminal-name-prefix |
1127 | (number-to-string te-width) | |
1128 | (number-to-string te-height))) | |
424751de | 1129 | (setq mode-line-buffer-identification |
1130 | (list (format "Emacs terminal %dx%d: %%b " te-width te-height) | |
1131 | 'te-pending-output-info)) | |
1132 | (let ((buffer-read-only nil)) | |
1133 | (te-clear-screen)) | |
1134 | (let (process) | |
1135 | (while (setq process (get-buffer-process (current-buffer))) | |
1136 | (if (y-or-n-p (format "Kill process %s? " (process-name process))) | |
1137 | (delete-process process) | |
1138 | (error "Process %s not killed" (process-name process))))) | |
1139 | (condition-case err | |
398e98d1 RS |
1140 | (let ((process-environment |
1141 | (cons (concat "TERM=" te-terminal-name) | |
1142 | (cons (concat "TERMCAP=" (te-create-termcap)) | |
1143 | (cons (concat "TERMINFO=" (te-create-terminfo)) | |
1144 | process-environment))))) | |
1145 | (setq te-process | |
1146 | (start-process "terminal-emulator" (current-buffer) | |
1147 | "/bin/sh" "-c" | |
1148 | ;; Yuck!!! Start a shell to set some terminal | |
1149 | ;; control characteristics. Then start the | |
1150 | ;; "env" program to setup the terminal type | |
1151 | ;; Then finally start the program we wanted. | |
1152 | (format "%s; exec %s" | |
1153 | te-stty-string | |
1154 | (mapconcat 'te-quote-arg-for-sh | |
cce2176a | 1155 | (cons program args) " ")))) |
41f6016e RS |
1156 | (set-process-filter te-process 'te-filter) |
1157 | (set-process-sentinel te-process 'te-sentinel)) | |
424751de | 1158 | (error (fundamental-mode) |
1159 | (signal (car err) (cdr err)))) | |
424751de | 1160 | (setq inhibit-quit t) ;sport death |
1161 | (use-local-map terminal-map) | |
1162 | (run-hooks 'terminal-mode-hook) | |
094dce78 | 1163 | (message "Entering Emacs terminal-emulator... Type %s %s for help" |
424751de | 1164 | (single-key-description terminal-escape-char) |
1165 | (mapconcat 'single-key-description | |
bc69c9c2 | 1166 | (where-is-internal 'te-escape-help terminal-escape-map t) |
424751de | 1167 | " "))) |
1168 | ||
1169 | ||
1170 | (defun te-parse-program-and-args (s) | |
61361a07 | 1171 | (cond ((string-match "\\`\\([-a-zA-Z0-9+=_.@/:]+[ \t]*\\)+\\'" s) |
424751de | 1172 | (let ((l ()) (p 0)) |
1173 | (while p | |
1174 | (setq l (cons (if (string-match | |
61361a07 | 1175 | "\\([-a-zA-Z0-9+=_.@/:]+\\)\\([ \t]+\\)*" |
424751de | 1176 | s p) |
1177 | (prog1 (substring s p (match-end 1)) | |
1178 | (setq p (match-end 0)) | |
1ea0c057 | 1179 | (if (eq p (length s)) (setq p nil))) |
424751de | 1180 | (prog1 (substring s p) |
1181 | (setq p nil))) | |
1182 | l))) | |
1183 | (setq l (nreverse l)) | |
1184 | (list (car l) (cdr l)))) | |
1185 | ((and (string-match "[ \t]" s) (not (file-exists-p s))) | |
1186 | (list shell-file-name (list "-c" (concat "exec " s)))) | |
1187 | (t (list s ())))) | |
1188 | ||
1189 | (put 'terminal-mode 'mode-class 'special) | |
1190 | ;; This is only separated out from function terminal-emulator | |
eb8c3be9 | 1191 | ;; to keep the latter a little more manageable. |
424751de | 1192 | (defun terminal-mode () |
eb8c3be9 | 1193 | "Set up variables for use with the terminal-emulator. |
424751de | 1194 | One should not call this -- it is an internal function |
1195 | of the terminal-emulator" | |
1196 | (kill-all-local-variables) | |
1197 | (buffer-disable-undo (current-buffer)) | |
1198 | (setq major-mode 'terminal-mode) | |
1199 | (setq mode-name "terminal") | |
1200 | ; (make-local-variable 'Helper-return-blurb) | |
1201 | ; (setq Helper-return-blurb "return to terminal simulator") | |
b11e1526 | 1202 | (setq mode-line-process '(":%s")) |
424751de | 1203 | (setq buffer-read-only t) |
1204 | (setq truncate-lines t) | |
1205 | (make-local-variable 'terminal-escape-char) | |
1206 | (setq terminal-escape-char (default-value 'terminal-escape-char)) | |
1207 | (make-local-variable 'terminal-scrolling) | |
1208 | (setq terminal-scrolling (default-value 'terminal-scrolling)) | |
1209 | (make-local-variable 'terminal-more-processing) | |
1210 | (setq terminal-more-processing (default-value 'terminal-more-processing)) | |
1211 | (make-local-variable 'terminal-redisplay-interval) | |
1212 | (setq terminal-redisplay-interval (default-value 'terminal-redisplay-interval)) | |
1213 | (make-local-variable 'te-width) | |
1214 | (make-local-variable 'te-height) | |
1215 | (make-local-variable 'te-process) | |
1216 | (make-local-variable 'te-pending-output) | |
1217 | (setq te-pending-output (list 0)) | |
1218 | (make-local-variable 'te-saved-point) | |
1219 | (setq te-saved-point (point-min)) | |
1220 | (make-local-variable 'te-pending-output-info) ;for the mode line | |
1221 | (setq te-pending-output-info "") | |
1222 | (make-local-variable 'inhibit-quit) | |
1223 | ;(setq inhibit-quit t) | |
1224 | (make-local-variable 'te-log-buffer) | |
1225 | (setq te-log-buffer nil) | |
1226 | (make-local-variable 'te-more-count) | |
1227 | (setq te-more-count -1) | |
1228 | (make-local-variable 'te-redisplay-count) | |
1229 | (setq te-redisplay-count terminal-redisplay-interval) | |
424751de | 1230 | ;(use-local-map terminal-mode-map) |
1231 | ;; terminal-mode-hook is called above in function terminal-emulator | |
1232 | ) | |
1233 | \f | |
1234 | ;;;; what a complete loss | |
1235 | ||
1236 | (defun te-quote-arg-for-sh (string) | |
61361a07 | 1237 | (cond ((string-match "\\`[-a-zA-Z0-9+=_.@/:]+\\'" |
424751de | 1238 | string) |
1239 | string) | |
1240 | ((not (string-match "[$]" string)) | |
1241 | ;; "[\"\\]" are special to sh and the lisp reader in the same way | |
1242 | (prin1-to-string string)) | |
1243 | (t | |
1244 | (let ((harder "") | |
1245 | (start 0) | |
1246 | (end 0)) | |
1247 | (while (cond ((>= start (length string)) | |
1248 | nil) | |
1249 | ;; this is the set of chars magic with "..." in `sh' | |
1250 | ((setq end (string-match "[\"\\$]" | |
1251 | string start)) | |
1252 | t) | |
1253 | (t (setq harder (concat harder | |
1254 | (substring string start))) | |
1255 | nil)) | |
1256 | (setq harder (concat harder (substring string start end) | |
1257 | ;; Can't use ?\\ since `concat' | |
1258 | ;; unfortunately does prin1-to-string | |
1259 | ;; on fixna. Amazing. | |
1260 | "\\" | |
1261 | (substring string | |
1262 | end | |
1263 | (1+ end))) | |
1264 | start (1+ end))) | |
7229064d | 1265 | (concat "\"" harder "\""))))) |
49116ac0 | 1266 | |
398e98d1 | 1267 | (defun te-create-terminfo () |
cce2176a | 1268 | "Create and compile a terminfo entry for the virtual terminal. This is kept |
099cffd4 | 1269 | in the directory specified by `te-terminfo-directory'." |
aea8821d RS |
1270 | (when (and system-uses-terminfo |
1271 | (not (file-exists-p (concat te-terminfo-directory | |
1272 | (substring te-terminal-name-prefix 0 1) | |
1273 | "/" te-terminal-name)))) | |
cce2176a NF |
1274 | (let ( (terminfo |
1275 | (concat | |
099cffd4 RS |
1276 | ;; The first newline avoids trouble with ncurses. |
1277 | (format "%s,\n\tmir, xon,cols#%d, lines#%d," | |
398e98d1 RS |
1278 | te-terminal-name te-width te-height) |
1279 | "bel=^P^G, clear=^P\\f, cr=^P^A, cub1=^P^B, cud1=^P\\n," | |
1280 | "cuf1=^P^F, cup=^P=%p1%'\\s'%+%c%p2%'\\s'%+%c," | |
1281 | "dch=^Pd%p1%'\\s'%+%c, dch1=^Pd!, dl=^P^K%p1%'\\s'%+%c," | |
1282 | "dl1=^P^K!, ed=^PC, el=^Pc, home=^P=\\s\\s," | |
1283 | "ich=^P_%p1%'\\s'%+%c, ich1=^P_!, il=^P^O%p1%'\\s'%+%c," | |
aea8821d | 1284 | ;; The last newline avoids trouble with ncurses. |
099cffd4 | 1285 | "il1=^P^O!, ind=^P\\n, nel=\\n,\n")) |
aea8821d | 1286 | ;; This is the desired name for the source file. |
099cffd4 RS |
1287 | (file-name (concat te-terminfo-directory te-terminal-name ".tif")) ) |
1288 | (make-directory te-terminfo-directory t) | |
aea8821d RS |
1289 | (let ((temp-file |
1290 | (make-temp-file (expand-file-name "tif" te-terminfo-directory)))) | |
1291 | ;; Store the source file under a random temp name. | |
1292 | (with-temp-file temp-file | |
1293 | (insert terminfo)) | |
1294 | ;; Rename it to the desired name. | |
1295 | ;; We use this roundabout approach | |
1296 | ;; to avoid any risk of writing a name that | |
1297 | ;; was michievouslyt set up as a symlink. | |
1298 | (rename-file temp-file file-name)) | |
1299 | ;; Now compile that source to make the binary that the | |
1300 | ;; programs actually use. | |
1301 | (let ((process-environment | |
1302 | (cons (concat "TERMINFO=" | |
1303 | (directory-file-name te-terminfo-directory)) | |
1304 | process-environment))) | |
398e98d1 RS |
1305 | (set-process-sentinel (start-process "tic" nil "tic" file-name) |
1306 | 'te-tic-sentinel)))) | |
aea8821d | 1307 | (directory-file-name te-terminfo-directory)) |
398e98d1 RS |
1308 | |
1309 | (defun te-create-termcap () | |
1310 | "Create a termcap entry for the virtual terminal" | |
1311 | ;; Because of Unix Brain Death(tm), we can't change | |
1312 | ;; the terminal type of a running process, and so | |
1313 | ;; terminal size and scrollability are wired-down | |
1314 | ;; at this point. ("Detach? What's that?") | |
1315 | (concat (format "%s:co#%d:li#%d:%s" | |
1316 | ;; Sigh. These can't be dynamically changed. | |
1317 | te-terminal-name te-width te-height (if terminal-scrolling | |
1318 | "" "ns:")) | |
1319 | ;;-- Basic things | |
1320 | ;; cursor-motion, bol, forward/backward char | |
1321 | "cm=^p=%+ %+ :cr=^p^a:le=^p^b:nd=^p^f:" | |
1322 | ;; newline, clear eof/eof, audible bell | |
1323 | "nw=^j:ce=^pc:cd=^pC:cl=^p^l:bl=^p^g:" | |
1324 | ;; insert/delete char/line | |
1325 | "IC=^p_%+ :DC=^pd%+ :AL=^p^o%+ :DL=^p^k%+ :" | |
1326 | ;;-- Not-widely-known (ie nonstandard) flags, which mean | |
1327 | ;; o writing in the last column of the last line | |
1328 | ;; doesn't cause idiotic scrolling, and | |
1329 | ;; o don't use idiotische c-s/c-q sogenannte | |
1330 | ;; ``flow control'' auf keinen Fall. | |
1331 | "LP:NF:" | |
1332 | ;;-- For stupid or obsolete programs | |
1333 | "ic=^p_!:dc=^pd!:al=^p^o!:dl=^p^k!:ho=^p= :" | |
1334 | ;;-- For disgusting programs. | |
1335 | ;; (VI? What losers need these, I wonder?) | |
1336 | "im=:ei=:dm=:ed=:mi:do=^p^j:nl=^p^j:bs:") | |
1337 | ) | |
1338 | ||
1339 | (defun te-tic-sentinel (proc state-change) | |
1340 | "If tic has finished, delete the .tif file" | |
1341 | (if (equal state-change "finished | |
1342 | ") | |
099cffd4 | 1343 | (delete-file (concat te-terminfo-directory te-terminal-name ".tif")))) |
398e98d1 | 1344 | |
49116ac0 | 1345 | (provide 'terminal) |
d501f516 | 1346 | |
cbee283d | 1347 | ;; arch-tag: 0ae1d7d7-90ef-4566-a531-6e7ff8c79b2f |
d501f516 | 1348 | ;;; terminal.el ends here |