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d501f516 ER |
1 | ;;; terminal.el --- terminal emulator for GNU Emacs. |
2 | ||
d3f7c8c6 | 3 | ;; Copyright (C) 1986, 1987, 1988, 1989, 1993 Free Software Foundation, Inc. |
eea8d4ef | 4 | |
e5167999 ER |
5 | ;; Author: Richard Mlynarik <mly@eddie.mit.edu> |
6 | ;; Maintainer: FSF | |
e9571d2a | 7 | ;; Keywords: comm, terminals |
424751de | 8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
424751de | 14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
e5167999 ER |
25 | ;;; Code: |
26 | ||
424751de | 27 | ;;>>TODO |
28 | ;;>> terminfo? | |
29 | ;;>> ** Nothing can be done about emacs' meta-lossage ** | |
30 | ;;>> (without redoing keymaps `sanely' -- ask Mly for details) | |
31 | ||
32 | ;;>> One probably wants to do setenv MORE -c when running with | |
33 | ;;>> more-processing enabled. | |
34 | ||
424751de | 35 | (require 'ehelp) |
36 | ||
37 | (defvar terminal-escape-char ?\C-^ | |
38 | "*All characters except for this are passed verbatim through the | |
39 | terminal-emulator. This character acts as a prefix for commands | |
40 | to the emulator program itself. Type this character twice to send | |
41 | it through the emulator. Type ? after typing it for a list of | |
42 | possible commands. | |
43 | This variable is local to each terminal-emulator buffer.") | |
44 | ||
45 | (defvar terminal-scrolling t ;;>> Setting this to T sort-of defeats my whole aim in writing this package... | |
46 | "*If non-nil, the terminal-emulator will losingly `scroll' when output occurs | |
47 | past the bottom of the screen. If nil, output will win and `wrap' to the top | |
48 | of the screen. | |
49 | This variable is local to each terminal-emulator buffer.") | |
50 | ||
51 | (defvar terminal-more-processing t | |
52 | "*If non-nil, do more-processing. | |
53 | This variable is local to each terminal-emulator buffer.") | |
54 | ||
55 | ;; If you are the sort of loser who uses scrolling without more breaks | |
56 | ;; and expects to actually see anything, you should probably set this to | |
57 | ;; around 400 | |
58 | (defvar terminal-redisplay-interval 5000 | |
59 | "*Maximum number of characters which will be processed by the | |
60 | terminal-emulator before a screen redisplay is forced. | |
61 | Set this to a large value for greater throughput, | |
62 | set it smaller for more frequent updates but overall slower | |
63 | performance.") | |
64 | ||
65 | (defvar terminal-more-break-insertion | |
66 | "*** More break -- Press space to continue ***") | |
67 | ||
d3f7c8c6 RS |
68 | (defvar terminal-meta-map nil) |
69 | (if terminal-meta-map | |
70 | nil | |
71 | (let ((map (make-sparse-keymap))) | |
72 | (define-key map [t] 'te-pass-through) | |
73 | (setq terminal-meta-map map))) | |
74 | ||
424751de | 75 | (defvar terminal-map nil) |
424751de | 76 | (if terminal-map |
77 | nil | |
d3f7c8c6 RS |
78 | (let ((map (make-sparse-keymap))) |
79 | (define-key map [t] 'te-pass-through) | |
80 | (define-key map "\e" terminal-meta-map) | |
424751de | 81 | ;(define-key map "\C-l" |
82 | ; '(lambda () (interactive) (te-pass-through) (redraw-display))) | |
83 | (setq terminal-map map))) | |
84 | ||
54f91c5b | 85 | (defvar terminal-escape-map nil) |
424751de | 86 | (if terminal-escape-map |
87 | nil | |
d3f7c8c6 RS |
88 | (let ((map (make-sparse-keymap))) |
89 | (define-key map [t] 'undefined) | |
424751de | 90 | (let ((s "0")) |
91 | (while (<= (aref s 0) ?9) | |
92 | (define-key map s 'digit-argument) | |
93 | (aset s 0 (1+ (aref s 0))))) | |
94 | (define-key map "b" 'switch-to-buffer) | |
95 | (define-key map "o" 'other-window) | |
96 | (define-key map "e" 'te-set-escape-char) | |
97 | (define-key map "\C-l" 'redraw-display) | |
98 | (define-key map "\C-o" 'te-flush-pending-output) | |
99 | (define-key map "m" 'te-toggle-more-processing) | |
100 | (define-key map "x" 'te-escape-extended-command) | |
101 | ;;>> What use is this? Why is it in the default terminal-emulator map? | |
102 | (define-key map "w" 'te-edit) | |
103 | (define-key map "?" 'te-escape-help) | |
104 | (define-key map (char-to-string help-char) 'te-escape-help) | |
105 | (setq terminal-escape-map map))) | |
106 | ||
54f91c5b | 107 | (defvar te-escape-command-alist nil) |
424751de | 108 | (if te-escape-command-alist |
109 | nil | |
110 | (setq te-escape-command-alist | |
111 | '(("Set Escape Character" . te-set-escape-char) | |
112 | ;;>> What use is this? Why is it in the default terminal-emulator map? | |
113 | ("Edit" . te-edit) | |
114 | ("Refresh" . redraw-display) | |
115 | ("Record Output" . te-set-output-log) | |
116 | ("Photo" . te-set-output-log) | |
117 | ("Tofu" . te-tofu) ;; confuse the uninitiated | |
118 | ("Stuff Input" . te-stuff-string) | |
119 | ("Flush Pending Output" . te-flush-pending-output) | |
120 | ("Enable More Processing" . te-enable-more-processing) | |
121 | ("Disable More Processing" . te-disable-more-processing) | |
122 | ("Scroll at end of page" . te-do-scrolling) | |
123 | ("Wrap at end of page" . te-do-wrapping) | |
124 | ("Switch To Buffer" . switch-to-buffer) | |
125 | ("Other Window" . other-window) | |
126 | ("Kill Buffer" . kill-buffer) | |
127 | ("Help" . te-escape-help) | |
128 | ("Set Redisplay Interval" . te-set-redisplay-interval) | |
129 | ))) | |
130 | ||
54f91c5b | 131 | (defvar terminal-more-break-map nil) |
424751de | 132 | (if terminal-more-break-map |
133 | nil | |
d3f7c8c6 RS |
134 | (let ((map (make-sparse-keymap))) |
135 | (define-key map [t] 'te-more-break-unread) | |
424751de | 136 | (define-key map (char-to-string help-char) 'te-more-break-help) |
137 | (define-key map " " 'te-more-break-resume) | |
138 | (define-key map "\C-l" 'redraw-display) | |
139 | (define-key map "\C-o" 'te-more-break-flush-pending-output) | |
140 | ;;>>> this isn't right | |
141 | ;(define-key map "\^?" 'te-more-break-flush-pending-output) ;DEL | |
142 | (define-key map "\r" 'te-more-break-advance-one-line) | |
143 | ||
144 | (setq terminal-more-break-map map))) | |
145 | ||
146 | \f | |
54f91c5b ER |
147 | ;;; Pacify the byte compiler |
148 | (defvar te-process nil) | |
149 | (defvar te-log-buffer nil) | |
150 | (defvar te-height nil) | |
151 | (defvar te-width nil) | |
152 | (defvar te-more-count nil) | |
153 | (defvar te-redisplay-count nil) | |
154 | (defvar te-pending-output nil) | |
155 | (defvar te-saved-point) | |
156 | (defvar te-more-old-point nil) | |
157 | (defvar te-more-old-local-map nil) | |
158 | (defvar te-more-old-filter nil) | |
159 | (defvar te-more-old-mode-line-format nil) | |
160 | (defvar te-pending-output-info nil) | |
161 | ||
162 | \f | |
424751de | 163 | ;;;; escape map |
164 | ||
165 | (defun te-escape () | |
166 | (interactive) | |
167 | (let (s | |
168 | (local (current-local-map)) | |
169 | (global (current-global-map))) | |
170 | (unwind-protect | |
171 | (progn | |
172 | (use-global-map terminal-escape-map) | |
173 | (use-local-map terminal-escape-map) | |
174 | (setq s (read-key-sequence | |
175 | (if prefix-arg | |
176 | (format "Emacs Terminal escape> %d " | |
177 | (prefix-numeric-value prefix-arg)) | |
178 | "Emacs Terminal escape> ")))) | |
179 | (use-global-map global) | |
180 | (use-local-map local)) | |
181 | (message "") | |
182 | (cond ((string= s (make-string 1 terminal-escape-char)) | |
183 | (setq last-command-char terminal-escape-char) | |
184 | (let ((terminal-escape-char -259)) | |
185 | (te-pass-through))) | |
186 | ((setq s (lookup-key terminal-escape-map s)) | |
187 | (call-interactively s))))) | |
188 | ||
189 | (defun te-escape-help () | |
190 | "Provide help on commands available after terminal-escape-char is typed." | |
191 | (interactive) | |
192 | (message "Terminal emulator escape help...") | |
193 | (let ((char (single-key-description terminal-escape-char))) | |
194 | (with-electric-help | |
195 | (function (lambda () | |
196 | (princ (format "Terminal-emulator escape, invoked by \"%s\" | |
197 | Type \"%s\" twice to send a single \"%s\" through. | |
198 | ||
199 | Other chars following \"%s\" are interpreted as follows:\n" | |
200 | char char char char)) | |
201 | ||
202 | (princ (substitute-command-keys "\\{terminal-escape-map}\n")) | |
203 | (princ (format "\nSubcommands of \"%s\" (%s)\n" | |
204 | (where-is-internal 'te-escape-extended-command | |
205 | terminal-escape-map nil t) | |
206 | 'te-escape-extended-command)) | |
207 | (let ((l (if (fboundp 'sortcar) | |
208 | (sortcar (copy-sequence te-escape-command-alist) | |
209 | 'string<) | |
210 | (sort (copy-sequence te-escape-command-alist) | |
211 | (function (lambda (a b) | |
212 | (string< (car a) (car b)))))))) | |
213 | (while l | |
214 | (let ((doc (or (documentation (cdr (car l))) | |
215 | "Not documented"))) | |
216 | (if (string-match "\n" doc) | |
217 | ;; just use first line of documentation | |
218 | (setq doc (substring doc 0 (match-beginning 0)))) | |
219 | (princ " \"") | |
220 | (princ (car (car l))) | |
221 | (princ "\":\n ") | |
222 | (princ doc) | |
223 | (write-char ?\n)) | |
224 | (setq l (cdr l)))) | |
225 | nil))))) | |
226 | ||
227 | ||
228 | ||
229 | (defun te-escape-extended-command () | |
230 | (interactive) | |
231 | (let ((c (let ((completion-ignore-case t)) | |
232 | (completing-read "terminal command: " | |
233 | te-escape-command-alist | |
234 | nil t)))) | |
235 | (if c | |
236 | (catch 'foo | |
237 | (setq c (downcase c)) | |
238 | (let ((l te-escape-command-alist)) | |
239 | (while l | |
240 | (if (string= c (downcase (car (car l)))) | |
241 | (throw 'foo (call-interactively (cdr (car l)))) | |
242 | (setq l (cdr l))))))))) | |
243 | ||
244 | ;; not used. | |
245 | (defun te-escape-extended-command-unread () | |
246 | (interactive) | |
383aee86 | 247 | (setq unread-command-events (listify-key-sequence (this-command-keys))) |
424751de | 248 | (te-escape-extended-command)) |
249 | ||
250 | (defun te-set-escape-char (c) | |
251 | "Change the terminal-emulator escape character." | |
252 | (interactive "cSet escape character to: ") | |
253 | (let ((o terminal-escape-char)) | |
254 | (message (if (= o c) | |
e2a2f845 RS |
255 | "\"%s\" is the escape char" |
256 | "\"%s\" is now the escape; \"%s\" passes through") | |
424751de | 257 | (single-key-description c) |
258 | (single-key-description o)) | |
259 | (setq terminal-escape-char c))) | |
260 | ||
261 | ||
262 | (defun te-stuff-string (string) | |
263 | "Read a string to send to through the terminal emulator | |
264 | as though that string had been typed on the keyboard. | |
265 | ||
266 | Very poor man's file transfer protocol." | |
267 | (interactive "sStuff string: ") | |
268 | (process-send-string te-process string)) | |
269 | ||
270 | (defun te-set-output-log (name) | |
271 | "Record output from the terminal emulator in a buffer." | |
272 | (interactive (list (if te-log-buffer | |
273 | nil | |
274 | (read-buffer "Record output in buffer: " | |
275 | (format "%s output-log" | |
276 | (buffer-name (current-buffer))) | |
277 | nil)))) | |
278 | (if (or (null name) (equal name "")) | |
279 | (progn (setq te-log-buffer nil) | |
280 | (message "Output logging off.")) | |
281 | (if (get-buffer name) | |
282 | nil | |
283 | (save-excursion | |
284 | (set-buffer (get-buffer-create name)) | |
285 | (fundamental-mode) | |
286 | (buffer-disable-undo (current-buffer)) | |
287 | (erase-buffer))) | |
288 | (setq te-log-buffer (get-buffer name)) | |
289 | (message "Recording terminal emulator output into buffer \"%s\"" | |
290 | (buffer-name te-log-buffer)))) | |
291 | ||
292 | (defun te-tofu () | |
293 | "Discontinue output log." | |
294 | (interactive) | |
295 | (te-set-output-log nil)) | |
296 | ||
297 | ||
298 | (defun te-toggle (sym arg) | |
299 | (set sym (cond ((not (numberp arg)) arg) | |
300 | ((= arg 1) (not (symbol-value sym))) | |
301 | ((< arg 0) nil) | |
302 | (t t)))) | |
303 | ||
304 | (defun te-toggle-more-processing (arg) | |
305 | (interactive "p") | |
306 | (message (if (te-toggle 'terminal-more-processing arg) | |
307 | "More processing on" "More processing off")) | |
308 | (if terminal-more-processing (setq te-more-count -1))) | |
309 | ||
310 | (defun te-toggle-scrolling (arg) | |
311 | (interactive "p") | |
312 | (message (if (te-toggle 'terminal-scrolling arg) | |
313 | "Scroll at end of page" "Wrap at end of page"))) | |
314 | ||
315 | (defun te-enable-more-processing () | |
316 | "Enable ** MORE ** processing" | |
317 | (interactive) | |
318 | (te-toggle-more-processing t)) | |
319 | ||
320 | (defun te-disable-more-processing () | |
321 | "Disable ** MORE ** processing" | |
322 | (interactive) | |
323 | (te-toggle-more-processing nil)) | |
324 | ||
325 | (defun te-do-scrolling () | |
326 | "Scroll at end of page (yuck)" | |
327 | (interactive) | |
328 | (te-toggle-scrolling t)) | |
329 | ||
330 | (defun te-do-wrapping () | |
331 | "Wrap to top of window at end of page" | |
332 | (interactive) | |
333 | (te-toggle-scrolling nil)) | |
334 | ||
335 | ||
336 | (defun te-set-redisplay-interval (arg) | |
337 | "Set the maximum interval (in output characters) between screen updates. | |
338 | Set this number to large value for greater throughput, | |
339 | set it smaller for more frequent updates (but overall slower performance." | |
340 | (interactive "NMax number of output chars between redisplay updates: ") | |
341 | (setq arg (max arg 1)) | |
342 | (setq terminal-redisplay-interval arg | |
343 | te-redisplay-count 0)) | |
344 | \f | |
345 | ;;;; more map | |
346 | ||
347 | ;; every command -must- call te-more-break-unwind | |
348 | ;; or grave lossage will result | |
349 | ||
350 | (put 'te-more-break-unread 'suppress-keymap t) | |
351 | (defun te-more-break-unread () | |
352 | (interactive) | |
d3f7c8c6 | 353 | (if (eq last-input-char terminal-escape-char) |
424751de | 354 | (call-interactively 'te-escape) |
355 | (message "Continuing from more break (\"%s\" typed, %d chars output pending...)" | |
356 | (single-key-description last-input-char) | |
357 | (te-pending-output-length)) | |
358 | (setq te-more-count 259259) | |
359 | (te-more-break-unwind) | |
360 | (let ((terminal-more-processing nil)) | |
361 | (te-pass-through)))) | |
362 | ||
363 | (defun te-more-break-resume () | |
364 | "Proceed past the **MORE** break, | |
365 | allowing the next page of output to appear" | |
366 | (interactive) | |
367 | (message "Continuing from more break") | |
368 | (te-more-break-unwind)) | |
369 | ||
370 | (defun te-more-break-help () | |
371 | "Provide help on commands available in a terminal-emulator **MORE** break" | |
372 | (interactive) | |
373 | (message "Terminal-emulator more break help...") | |
374 | (sit-for 0) | |
375 | (with-electric-help | |
376 | (function (lambda () | |
377 | (princ "Terminal-emulator more break.\n\n") | |
378 | (princ (format "Type \"%s\" (te-more-break-resume)\n%s\n" | |
379 | (where-is-internal 'te-more-break-resume | |
380 | terminal-more-break-map nil t) | |
381 | (documentation 'te-more-break-resume))) | |
382 | (princ (substitute-command-keys "\\{terminal-more-break-map}\n")) | |
383 | (princ "Any other key is passed through to the program | |
384 | running under the terminal emulator and disables more processing until | |
385 | all pending output has been dealt with.") | |
386 | nil)))) | |
387 | ||
388 | ||
389 | (defun te-more-break-advance-one-line () | |
390 | "Allow one more line of text to be output before doing another more break." | |
391 | (interactive) | |
392 | (setq te-more-count 1) | |
393 | (te-more-break-unwind)) | |
394 | ||
395 | (defun te-more-break-flush-pending-output () | |
396 | "Discard any output which has been received by the terminal emulator but | |
397 | not yet proceesed and then proceed from the more break." | |
398 | (interactive) | |
399 | (te-more-break-unwind) | |
400 | (te-flush-pending-output)) | |
401 | ||
402 | (defun te-flush-pending-output () | |
403 | "Discard any as-yet-unprocessed output which has been received by | |
404 | the terminal emulator." | |
405 | (interactive) | |
406 | ;; this could conceivably be confusing in the presence of | |
407 | ;; escape-sequences spanning process-output chunks | |
408 | (if (null (cdr te-pending-output)) | |
409 | (message "(There is no output pending)") | |
410 | (let ((length (te-pending-output-length))) | |
411 | (message "Flushing %d chars of pending output" length) | |
412 | (setq te-pending-output | |
413 | (list 0 (format "\n*** %d chars of pending output flushed ***\n" | |
414 | length))) | |
415 | (te-update-pending-output-display) | |
416 | (te-process-output nil) | |
417 | (sit-for 0)))) | |
418 | ||
419 | \f | |
420 | (defun te-pass-through () | |
421 | "Character is passed to the program running under the terminal emulator. | |
422 | One characters is treated specially: | |
423 | the terminal escape character (normally C-^) | |
424 | lets you type a terminal emulator command." | |
425 | (interactive) | |
d3f7c8c6 RS |
426 | (setq list (cons last-input-char list)) |
427 | (cond ((eq last-input-char terminal-escape-char) | |
424751de | 428 | (call-interactively 'te-escape)) |
429 | (t | |
d3f7c8c6 RS |
430 | ;; Convert `return' to C-m, etc. |
431 | (if (and (symbolp last-input-char) | |
432 | (get last-input-char 'ascii-character)) | |
433 | (setq last-input-char (get last-input-char 'ascii-character))) | |
434 | ;; Convert meta characters to 8-bit form for transmission. | |
435 | (if (and (integerp last-input-char) | |
436 | (not (zerop (logand last-input-char (lsh 1 23))))) | |
437 | (setq last-input-char (+ 128 (logand last-input-char 127)))) | |
438 | (setq list (cons (list 'really last-input-char) list)) | |
439 | ;; Now ignore all but actual characters. | |
440 | ;; (It ought to be possible to send through function | |
441 | ;; keys as character sequences if we add a description | |
442 | ;; to our termcap entry of what they should look like.) | |
443 | (if (integerp last-input-char) | |
444 | (progn | |
445 | (and terminal-more-processing (null (cdr te-pending-output)) | |
446 | (te-set-more-count nil)) | |
447 | (send-string te-process (make-string 1 last-input-char)) | |
448 | (te-process-output t)) | |
449 | (message "Function key `%s' ignored" | |
450 | (single-key-description last-input-char)))))) | |
424751de | 451 | |
452 | ||
453 | (defun te-set-window-start () | |
454 | (let* ((w (get-buffer-window (current-buffer))) | |
455 | (h (if w (window-height w)))) | |
456 | (cond ((not w)) ; buffer not displayed | |
457 | ((>= h (/ (- (point) (point-min)) (1+ te-width))) | |
458 | ;; this is the normal case | |
459 | (set-window-start w (point-min))) | |
460 | ;; this happens if some vandal shrinks our window. | |
461 | ((>= h (/ (- (point-max) (point)) (1+ te-width))) | |
462 | (set-window-start w (- (point-max) (* h (1+ te-width)) -1))) | |
463 | ;; I give up. | |
464 | (t nil)))) | |
465 | ||
466 | (defun te-pending-output-length () | |
467 | (let ((length (car te-pending-output)) | |
468 | (tem (cdr te-pending-output))) | |
469 | (while tem | |
470 | (setq length (+ length (length (car tem))) tem (cdr tem))) | |
471 | length)) | |
472 | \f | |
473 | ;;>> What use is this terminal-edit stuff anyway? | |
474 | ;;>> If nothing else, it was written by somebody who didn't | |
475 | ;;>> competently understand the terminal-emulator... | |
476 | ||
477 | (defvar terminal-edit-map nil) | |
478 | (if terminal-edit-map | |
479 | nil | |
480 | (setq terminal-edit-map (make-sparse-keymap)) | |
481 | (define-key terminal-edit-map "\C-c\C-c" 'terminal-cease-edit)) | |
482 | ||
483 | ;; Terminal Edit mode is suitable only for specially formatted data. | |
484 | (put 'terminal-edit-mode 'mode-class 'special) | |
485 | ||
486 | (defun terminal-edit-mode () | |
487 | "Major mode for editing the contents of a terminal-emulator buffer. | |
488 | The editing commands are the same as in Fundamental mode, | |
489 | together with a command \\<terminal-edit-mode-map>to return to terminal emulation: \\[terminal-cease-edit]." | |
490 | (use-local-map terminal-edit-map) | |
491 | (setq major-mode 'terminal-edit-mode) | |
492 | (setq mode-name "Terminal Edit") | |
493 | (setq mode-line-modified (default-value 'mode-line-modified)) | |
494 | (setq mode-line-process nil) | |
495 | (run-hooks 'terminal-edit-mode-hook)) | |
496 | ||
497 | (defun te-edit () | |
498 | "Start editing the terminal emulator buffer with ordinary Emacs commands." | |
499 | (interactive) | |
500 | (terminal-edit-mode) | |
501 | (set-buffer-modified-p (buffer-modified-p)) | |
502 | ;; Make mode line update. | |
503 | (if (eq (key-binding "\C-c\C-c") 'terminal-cease-edit) | |
504 | (message "Editing: Type C-c C-c to return to Terminal") | |
505 | (message (substitute-command-keys | |
506 | "Editing: Type \\[terminal-cease-edit] to return to Terminal")))) | |
507 | ||
508 | (defun terminal-cease-edit () | |
509 | "Finish editing message; switch back to Terminal proper." | |
510 | (interactive) | |
511 | ||
512 | ;;>> emulator will blow out if buffer isn't exactly te-width x te-height | |
513 | (let ((buffer-read-only nil)) | |
514 | (widen) | |
515 | (let ((opoint (point-marker)) | |
516 | (width te-width) | |
517 | (h (1- te-height))) | |
518 | (goto-char (point-min)) | |
519 | (while (>= h 0) | |
520 | (let ((p (point))) | |
521 | (cond ((search-forward "\n" (+ p width) 'move) | |
522 | (forward-char -1) | |
523 | (insert-char ?\ (- width (- (point) p))) | |
524 | (forward-char 1)) | |
525 | ((eobp) | |
526 | (insert-char ?\ (- width (- (point) p)))) | |
527 | ((= (following-char) ?\n) | |
528 | (forward-char 1)) | |
529 | (t | |
530 | (setq p (point)) | |
531 | (if (search-forward "\n" nil t) | |
532 | (delete-region p (1- (point))) | |
533 | (delete-region p (point-max)))))) | |
534 | (if (= h 0) | |
535 | (if (not (eobp)) (delete-region (point) (point-max))) | |
536 | (if (eobp) (insert ?\n))) | |
537 | (setq h (1- h))) | |
538 | (goto-char opoint) | |
539 | (set-marker opoint nil nil) | |
540 | (setq te-saved-point (point)) | |
541 | (setq te-redisplay-count 0) | |
542 | (setq te-more-count -1))) | |
543 | ||
544 | (setq mode-line-modified (default-value 'mode-line-modified)) | |
545 | (setq major-mode 'terminal-mode) | |
546 | (setq mode-name "terminal") | |
547 | (setq mode-line-process '(": %s"))) | |
548 | \f | |
549 | ;;;; more break hair | |
550 | ||
551 | (defun te-more-break () | |
552 | (te-set-more-count t) | |
553 | (make-local-variable 'te-more-old-point) | |
554 | (setq te-more-old-point (point)) | |
555 | (make-local-variable 'te-more-old-local-map) | |
556 | (setq te-more-old-local-map (current-local-map)) | |
557 | (use-local-map terminal-more-break-map) | |
558 | (make-local-variable 'te-more-old-filter) | |
559 | (setq te-more-old-filter (process-filter te-process)) | |
560 | (make-local-variable 'te-more-old-mode-line-format) | |
561 | (setq te-more-old-mode-line-format mode-line-format | |
562 | mode-line-format (list "-- **MORE** " | |
563 | mode-line-buffer-identification | |
564 | "%-")) | |
565 | (set-process-filter te-process | |
566 | (function (lambda (process string) | |
567 | (save-excursion | |
568 | (set-buffer (process-buffer process)) | |
569 | (setq te-pending-output (nconc te-pending-output | |
570 | (list string)))) | |
571 | (te-update-pending-output-display)))) | |
572 | (te-update-pending-output-display) | |
573 | (if (eq (window-buffer (selected-window)) (current-buffer)) | |
574 | (message "More break ")) | |
575 | (or (eobp) | |
576 | (null terminal-more-break-insertion) | |
577 | (save-excursion | |
578 | (forward-char 1) | |
579 | (delete-region (point) (+ (point) te-width)) | |
580 | (insert terminal-more-break-insertion))) | |
581 | (run-hooks 'terminal-more-break-hook) | |
582 | (sit-for 0) ;get display to update | |
583 | (throw 'te-process-output t)) | |
584 | ||
585 | (defun te-more-break-unwind () | |
586 | (use-local-map te-more-old-local-map) | |
587 | (set-process-filter te-process te-more-old-filter) | |
588 | (goto-char te-more-old-point) | |
589 | (setq mode-line-format te-more-old-mode-line-format) | |
590 | (set-buffer-modified-p (buffer-modified-p)) | |
591 | (let ((buffer-read-only nil)) | |
592 | (cond ((eobp)) | |
593 | (terminal-more-break-insertion | |
594 | (forward-char 1) | |
595 | (delete-region (point) | |
596 | (+ (point) (length terminal-more-break-insertion))) | |
597 | (insert-char ?\ te-width) | |
598 | (goto-char te-more-old-point))) | |
599 | (setq te-more-old-point nil) | |
600 | (let ((te-more-count 259259)) | |
601 | (te-newline))) | |
602 | ;(sit-for 0) | |
603 | (te-process-output t)) | |
604 | ||
605 | (defun te-set-more-count (newline) | |
606 | (let ((line (/ (- (point) (point-min)) (1+ te-width)))) | |
607 | (if newline (setq line (1+ line))) | |
608 | (cond ((= line te-height) | |
609 | (setq te-more-count te-height)) | |
610 | ;>>>> something is strange. Investigate this! | |
611 | ((= line (1- te-height)) | |
612 | (setq te-more-count te-height)) | |
613 | ((or (< line (/ te-height 2)) | |
614 | (> (- te-height line) 10)) | |
615 | ;; break at end of this page | |
616 | (setq te-more-count (- te-height line))) | |
617 | (t | |
618 | ;; migrate back towards top (ie bottom) of screen. | |
619 | (setq te-more-count (- te-height | |
620 | (if (> te-height 10) 2 1))))))) | |
621 | ||
622 | \f | |
623 | ;;;; More or less straight-forward terminal escapes | |
624 | ||
625 | ;; ^j, meaning `newline' to non-display programs. | |
626 | ;; (Who would think of ever writing a system which doesn't understand | |
627 | ;; display terminals natively? Un*x: The Operating System of the Future.) | |
628 | (defun te-newline () | |
629 | "Move down a line, optionally do more processing, perhaps wrap/scroll, | |
630 | move to start of new line, clear to end of line." | |
631 | (end-of-line) | |
632 | (cond ((not terminal-more-processing)) | |
633 | ((< (setq te-more-count (1- te-more-count)) 0) | |
634 | (te-set-more-count t)) | |
635 | ((eql te-more-count 0) | |
636 | ;; this doesn't return | |
637 | (te-more-break))) | |
638 | (if (eobp) | |
639 | (progn | |
640 | (delete-region (point-min) (+ (point-min) te-width)) | |
641 | (goto-char (point-min)) | |
642 | (if terminal-scrolling | |
643 | (progn (delete-char 1) | |
644 | (goto-char (point-max)) | |
645 | (insert ?\n)))) | |
646 | (forward-char 1) | |
647 | (delete-region (point) (+ (point) te-width))) | |
648 | (insert-char ?\ te-width) | |
649 | (beginning-of-line) | |
650 | (te-set-window-start)) | |
651 | ||
652 | ; ^p = x+32 y+32 | |
653 | (defun te-move-to-position () | |
654 | ;; must offset by #o40 since cretinous unix won't send a 004 char through | |
655 | (let ((y (- (te-get-char) 32)) | |
656 | (x (- (te-get-char) 32))) | |
657 | (if (or (> x te-width) | |
658 | (> y te-height)) | |
659 | () | |
660 | (goto-char (+ (point-min) x (* y (1+ te-width)))) | |
661 | ;(te-set-window-start?) | |
662 | )) | |
663 | (setq te-more-count -1)) | |
664 | ||
665 | ||
666 | ||
667 | ;; ^p c | |
668 | (defun te-clear-rest-of-line () | |
669 | (save-excursion | |
670 | (let ((n (- (point) (progn (end-of-line) (point))))) | |
671 | (delete-region (point) (+ (point) n)) | |
672 | (insert-char ?\ (- n))))) | |
673 | ||
674 | ||
675 | ;; ^p C | |
676 | (defun te-clear-rest-of-screen () | |
677 | (save-excursion | |
678 | (te-clear-rest-of-line) | |
679 | (while (progn (end-of-line) (not (eobp))) | |
680 | (forward-char 1) (end-of-line) | |
681 | (delete-region (- (point) te-width) (point)) | |
682 | (insert-char ?\ te-width)))) | |
683 | ||
684 | ||
685 | ;; ^p ^l | |
686 | (defun te-clear-screen () | |
687 | ;; regenerate buffer to compensate for (nonexistent!!) bugs. | |
688 | (erase-buffer) | |
689 | (let ((i 0)) | |
690 | (while (< i te-height) | |
691 | (setq i (1+ i)) | |
692 | (insert-char ?\ te-width) | |
693 | (insert ?\n))) | |
694 | (delete-region (1- (point-max)) (point-max)) | |
695 | (goto-char (point-min)) | |
696 | (setq te-more-count -1)) | |
697 | ||
698 | ||
699 | ;; ^p ^o count+32 | |
700 | (defun te-insert-lines () | |
701 | (if (not (bolp)) | |
702 | ();(error "fooI") | |
703 | (save-excursion | |
704 | (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1)) | |
705 | (n (min (- (te-get-char) ?\ ) line)) | |
706 | (i 0)) | |
707 | (delete-region (- (point-max) (* n (1+ te-width))) (point-max)) | |
708 | (if (eql (point) (point-max)) (insert ?\n)) | |
709 | (while (< i n) | |
710 | (setq i (1+ i)) | |
711 | (insert-char ?\ te-width) | |
712 | (or (eql i line) (insert ?\n)))))) | |
713 | (setq te-more-count -1)) | |
714 | ||
715 | ||
716 | ;; ^p ^k count+32 | |
717 | (defun te-delete-lines () | |
718 | (if (not (bolp)) | |
719 | ();(error "fooD") | |
720 | (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1)) | |
721 | (n (min (- (te-get-char) ?\ ) line)) | |
722 | (i 0)) | |
723 | (delete-region (point) | |
724 | (min (+ (point) (* n (1+ te-width))) (point-max))) | |
725 | (save-excursion | |
726 | (goto-char (point-max)) | |
727 | (while (< i n) | |
728 | (setq i (1+ i)) | |
729 | (insert-char ?\ te-width) | |
730 | (or (eql i line) (insert ?\n)))))) | |
731 | (setq te-more-count -1)) | |
732 | ||
733 | ;; ^p ^a | |
734 | (defun te-beginning-of-line () | |
735 | (beginning-of-line)) | |
736 | ||
737 | ;; ^p ^b | |
738 | (defun te-backward-char () | |
739 | (if (not (bolp)) | |
740 | (backward-char 1))) | |
741 | ||
742 | ;; ^p ^f | |
743 | (defun te-forward-char () | |
744 | (if (not (eolp)) | |
745 | (forward-char 1))) | |
746 | ||
747 | \f | |
748 | ;; 0177 | |
749 | (defun te-delete () | |
750 | (if (bolp) | |
751 | () | |
752 | (delete-region (1- (point)) (point)) | |
753 | (insert ?\ ) | |
754 | (forward-char -1))) | |
755 | ||
756 | ;; ^p ^g | |
757 | (defun te-beep () | |
758 | (beep)) | |
759 | ||
760 | ||
761 | ;; ^p _ count+32 | |
762 | (defun te-insert-spaces () | |
763 | (let* ((p (point)) | |
764 | (n (min (- (te-get-char) 32) | |
765 | (- (progn (end-of-line) (point)) p)))) | |
766 | (if (<= n 0) | |
767 | nil | |
768 | (delete-char (- n)) | |
769 | (goto-char p) | |
770 | (insert-char ?\ n)) | |
771 | (goto-char p))) | |
772 | ||
773 | ;; ^p d count+32 (should be ^p ^d but cretinous un*x won't send ^d chars!!!) | |
774 | (defun te-delete-char () | |
775 | (let* ((p (point)) | |
776 | (n (min (- (te-get-char) 32) | |
777 | (- (progn (end-of-line) (point)) p)))) | |
778 | (if (<= n 0) | |
779 | nil | |
780 | (insert-char ?\ n) | |
781 | (goto-char p) | |
782 | (delete-char n)) | |
783 | (goto-char p))) | |
784 | ||
785 | ||
786 | \f | |
787 | ;; disgusting unix-required shit | |
788 | ;; Are we living twenty years in the past yet? | |
789 | ||
790 | (defun te-losing-unix () | |
791 | nil) | |
792 | ||
793 | ;; ^i | |
794 | (defun te-output-tab () | |
795 | (let* ((p (point)) | |
796 | (x (- p (progn (beginning-of-line) (point)))) | |
797 | (l (min (- 8 (logand x 7)) | |
798 | (progn (end-of-line) (- (point) p))))) | |
799 | (goto-char (+ p l)))) | |
800 | ||
801 | ;; ^p ^j | |
802 | ;; Handle the `do' or `nl' termcap capability. | |
803 | ;;>> I am not sure why this broken, obsolete, capability is here. | |
804 | ;;>> Perhaps it is for VIle. No comment was made about why it | |
805 | ;;>> was added (in "Sun Dec 6 01:22:27 1987 Richard Stallman") | |
806 | (defun te-down-vertically-or-scroll () | |
807 | "Move down a line vertically, or scroll at bottom." | |
808 | (let ((column (current-column))) | |
809 | (end-of-line) | |
810 | (if (eobp) | |
811 | (progn | |
812 | (delete-region (point-min) (+ (point-min) te-width)) | |
813 | (goto-char (point-min)) | |
814 | (delete-char 1) | |
815 | (goto-char (point-max)) | |
816 | (insert ?\n) | |
817 | (insert-char ?\ te-width) | |
818 | (beginning-of-line)) | |
819 | (forward-line 1)) | |
820 | (move-to-column column)) | |
821 | (te-set-window-start)) | |
822 | ||
823 | ;; Also: | |
824 | ;; ^m => beginning-of-line (for which it -should- be using ^p ^a, right?!!) | |
825 | ;; ^g => te-beep (for which it should use ^p ^g) | |
826 | ;; ^h => te-backward-char (for which it should use ^p ^b) | |
827 | ||
828 | \f | |
829 | ||
830 | (defun te-filter (process string) | |
d3f7c8c6 | 831 | (let* ((obuf (current-buffer))) |
424751de | 832 | ;; can't use save-excursion, as that preserves point, which we don't want |
833 | (unwind-protect | |
834 | (progn | |
835 | (set-buffer (process-buffer process)) | |
836 | (goto-char te-saved-point) | |
837 | (and (bufferp te-log-buffer) | |
838 | (if (null (buffer-name te-log-buffer)) | |
839 | ;; killed | |
840 | (setq te-log-buffer nil) | |
841 | (set-buffer te-log-buffer) | |
842 | (goto-char (point-max)) | |
843 | (insert-before-markers string) | |
844 | (set-buffer (process-buffer process)))) | |
845 | (setq te-pending-output (nconc te-pending-output (list string))) | |
846 | (te-update-pending-output-display) | |
d3f7c8c6 RS |
847 | (te-process-output (eq (current-buffer) |
848 | (window-buffer (selected-window)))) | |
424751de | 849 | (set-buffer (process-buffer process)) |
850 | (setq te-saved-point (point))) | |
851 | (set-buffer obuf)))) | |
852 | ||
853 | ;; (A version of the following comment which might be distractingly offensive | |
854 | ;; to some readers has been moved to term-nasty.el.) | |
855 | ;; unix lacks ITS-style tty control... | |
856 | (defun te-process-output (preemptable) | |
857 | ;;>> There seems no good reason to ever disallow preemption | |
858 | (setq preemptable t) | |
859 | (catch 'te-process-output | |
860 | (let ((buffer-read-only nil) | |
861 | (string nil) ostring start char (matchpos nil)) | |
862 | (while (cdr te-pending-output) | |
863 | (setq ostring string | |
864 | start (car te-pending-output) | |
865 | string (car (cdr te-pending-output)) | |
866 | char (aref string start)) | |
867 | (if (eql (setq start (1+ start)) (length string)) | |
868 | (progn (setq te-pending-output | |
869 | (cons 0 (cdr (cdr te-pending-output))) | |
870 | start 0 | |
871 | string (car (cdr te-pending-output))) | |
872 | (te-update-pending-output-display)) | |
873 | (setcar te-pending-output start)) | |
874 | (if (and (> char ?\037) (< char ?\377)) | |
875 | (cond ((eolp) | |
876 | ;; unread char | |
877 | (if (eql start 0) | |
878 | (setq te-pending-output | |
879 | (cons 0 (cons (make-string 1 char) | |
880 | (cdr te-pending-output)))) | |
881 | (setcar te-pending-output (1- start))) | |
882 | (te-newline)) | |
883 | ((null string) | |
884 | (delete-char 1) (insert char) | |
885 | (te-redisplay-if-necessary 1)) | |
886 | (t | |
887 | (let ((end (or (and (eq ostring string) matchpos) | |
888 | (setq matchpos (string-match | |
889 | "[\000-\037\177-\377]" | |
890 | string start)) | |
891 | (length string)))) | |
892 | (delete-char 1) (insert char) | |
893 | (setq char (point)) (end-of-line) | |
894 | (setq end (min end (+ start (- (point) char)))) | |
895 | (goto-char char) | |
896 | (if (eql end matchpos) (setq matchpos nil)) | |
897 | (delete-region (point) (+ (point) (- end start))) | |
898 | (insert (if (and (eql start 0) | |
899 | (eql end (length string))) | |
900 | string | |
901 | (substring string start end))) | |
902 | (if (eql end (length string)) | |
903 | (setq te-pending-output | |
904 | (cons 0 (cdr (cdr te-pending-output)))) | |
905 | (setcar te-pending-output end)) | |
906 | (te-redisplay-if-necessary (1+ (- end start)))))) | |
907 | ;; I suppose if I split the guts of this out into a separate | |
908 | ;; function we could trivially emulate different terminals | |
909 | ;; Who cares in any case? (Apart from stupid losers using rlogin) | |
910 | (funcall | |
911 | (if (eql char ?\^p) | |
912 | (or (cdr (assq (te-get-char) | |
913 | '((?= . te-move-to-position) | |
914 | (?c . te-clear-rest-of-line) | |
915 | (?C . te-clear-rest-of-screen) | |
916 | (?\C-o . te-insert-lines) | |
917 | (?\C-k . te-delete-lines) | |
918 | ;; not necessary, but help sometimes. | |
919 | (?\C-a . te-beginning-of-line) | |
920 | (?\C-b . te-backward-char) | |
921 | ;; should be C-d, but un*x | |
922 | ;; pty's won't send \004 through! | |
923 | ;; Can you believe this? | |
924 | (?d . te-delete-char) | |
925 | (?_ . te-insert-spaces) | |
926 | ;; random | |
927 | (?\C-f . te-forward-char) | |
928 | (?\C-g . te-beep) | |
929 | (?\C-j . te-down-vertically-or-scroll) | |
930 | (?\C-l . te-clear-screen) | |
931 | ))) | |
932 | 'te-losing-unix) | |
933 | (or (cdr (assq char | |
934 | '((?\C-j . te-newline) | |
935 | (?\177 . te-delete) | |
936 | ;; Did I ask to be sent these characters? | |
937 | ;; I don't remember doing so, either. | |
938 | ;; (Perhaps some operating system or | |
939 | ;; other is completely incompetent...) | |
940 | (?\C-m . te-beginning-of-line) | |
941 | (?\C-g . te-beep) | |
942 | (?\C-h . te-backward-char) | |
943 | (?\C-i . te-output-tab)))) | |
944 | 'te-losing-unix))) | |
945 | (te-redisplay-if-necessary 1)) | |
946 | (and preemptable | |
947 | (input-pending-p) | |
948 | ;; preemptable output! Oh my!! | |
949 | (throw 'te-process-output t))))) | |
950 | ;; We must update window-point in every window displaying our buffer | |
951 | (let* ((s (selected-window)) | |
952 | (w s)) | |
953 | (while (not (eq s (setq w (next-window w)))) | |
954 | (if (eq (window-buffer w) (current-buffer)) | |
955 | (set-window-point w (point)))))) | |
956 | ||
957 | (defun te-get-char () | |
958 | (if (cdr te-pending-output) | |
959 | (let ((start (car te-pending-output)) | |
960 | (string (car (cdr te-pending-output)))) | |
961 | (prog1 (aref string start) | |
962 | (if (eql (setq start (1+ start)) (length string)) | |
963 | (setq te-pending-output (cons 0 (cdr (cdr te-pending-output)))) | |
964 | (setcar te-pending-output start)))) | |
965 | (catch 'char | |
966 | (let ((filter (process-filter te-process))) | |
967 | (unwind-protect | |
968 | (progn | |
969 | (set-process-filter te-process | |
970 | (function (lambda (p s) | |
971 | (or (eql (length s) 1) | |
972 | (setq te-pending-output (list 1 s))) | |
973 | (throw 'char (aref s 0))))) | |
974 | (accept-process-output te-process)) | |
975 | (set-process-filter te-process filter)))))) | |
976 | ||
977 | ||
978 | (defun te-redisplay-if-necessary (length) | |
979 | (and (<= (setq te-redisplay-count (- te-redisplay-count length)) 0) | |
980 | (eq (current-buffer) (window-buffer (selected-window))) | |
981 | (waiting-for-user-input-p) | |
982 | (progn (te-update-pending-output-display) | |
983 | (sit-for 0) | |
984 | (setq te-redisplay-count terminal-redisplay-interval)))) | |
985 | ||
986 | (defun te-update-pending-output-display () | |
987 | (if (null (cdr te-pending-output)) | |
988 | (setq te-pending-output-info "") | |
989 | (let ((length (te-pending-output-length))) | |
990 | (if (< length 1500) | |
991 | (setq te-pending-output-info "") | |
992 | (setq te-pending-output-info (format "(%dK chars output pending) " | |
993 | (/ (+ length 512) 1024)))))) | |
994 | ;; update mode line | |
995 | (set-buffer-modified-p (buffer-modified-p))) | |
996 | ||
997 | \f | |
998 | (defun te-sentinel (process message) | |
999 | (cond ((eq (process-status process) 'run)) | |
1000 | ((null (buffer-name (process-buffer process)))) ;deleted | |
1001 | (t (let ((b (current-buffer))) | |
1002 | (save-excursion | |
1003 | (set-buffer (process-buffer process)) | |
1004 | (setq buffer-read-only nil) | |
1005 | (fundamental-mode) | |
1006 | (goto-char (point-max)) | |
1007 | (delete-blank-lines) | |
1008 | (delete-horizontal-space) | |
1009 | (insert "\n*******\n" message "*******\n")) | |
1010 | (if (and (eq b (process-buffer process)) | |
1011 | (waiting-for-user-input-p)) | |
1012 | (progn (goto-char (point-max)) | |
1013 | (recenter -1))))))) | |
1014 | \f | |
d3f7c8c6 | 1015 | (defvar te-stty-string "stty -nl erase '^?' kill '^u' intr '^c' echo pass8" |
0f79a4ae JB |
1016 | "Shell command to set terminal modes for terminal emulator.") |
1017 | ;; This used to have `new' in it, but that loses outside BSD | |
1018 | ;; and it's apparently not needed in BSD. | |
424751de | 1019 | |
1020 | (defvar explicit-shell-file-name nil | |
1021 | "*If non-nil, is file name to use for explicitly requested inferior shell.") | |
1022 | ||
7229064d | 1023 | ;;;###autoload |
424751de | 1024 | (defun terminal-emulator (buffer program args &optional width height) |
1025 | "Under a display-terminal emulator in BUFFER, run PROGRAM on arguments ARGS. | |
1026 | ARGS is a list of argument-strings. Remaining arguments are WIDTH and HEIGHT. | |
1027 | BUFFER's contents are made an image of the display generated by that program, | |
1028 | and any input typed when BUFFER is the current Emacs buffer is sent to that | |
1029 | program an keyboard input. | |
1030 | ||
1031 | Interactively, BUFFER defaults to \"*terminal*\" and PROGRAM and ARGS | |
1032 | are parsed from an input-string using your usual shell. | |
1033 | WIDTH and HEIGHT are determined from the size of the current window | |
1034 | -- WIDTH will be one less than the window's width, HEIGHT will be its height. | |
1035 | ||
1036 | To switch buffers and leave the emulator, or to give commands | |
1037 | to the emulator itself (as opposed to the program running under it), | |
1038 | type Control-^. The following character is an emulator command. | |
1039 | Type Control-^ twice to send it to the subprogram. | |
1040 | This escape character may be changed using the variable `terminal-escape-char'. | |
1041 | ||
1042 | `Meta' characters may not currently be sent through the terminal emulator. | |
1043 | ||
1044 | Here is a list of some of the variables which control the behaviour | |
1045 | of the emulator -- see their documentation for more information: | |
1046 | terminal-escape-char, terminal-scrolling, terminal-more-processing, | |
1047 | terminal-redisplay-interval. | |
1048 | ||
1049 | This function calls the value of terminal-mode-hook if that exists | |
1050 | and is non-nil after the terminal buffer has been set up and the | |
1051 | subprocess started. | |
1052 | ||
1053 | Presently with `termcap' only; if somebody sends us code to make this | |
1054 | work with `terminfo' we will try to use it." | |
1055 | (interactive | |
1056 | (cons (save-excursion | |
1057 | (set-buffer (get-buffer-create "*terminal*")) | |
1058 | (buffer-name (if (or (not (boundp 'te-process)) | |
1059 | (null te-process) | |
1060 | (not (eq (process-status te-process) | |
1061 | 'run))) | |
1062 | (current-buffer) | |
1063 | (generate-new-buffer "*terminal*")))) | |
1064 | (append | |
1065 | (let* ((default-s | |
1066 | ;; Default shell is same thing M-x shell uses. | |
1067 | (or explicit-shell-file-name | |
1068 | (getenv "ESHELL") | |
1069 | (getenv "SHELL") | |
1070 | "/bin/sh")) | |
1071 | (s (read-string | |
1072 | (format "Run program in emulator: (default %s) " | |
1073 | default-s)))) | |
1074 | (if (equal s "") | |
1075 | (list default-s '()) | |
1076 | (te-parse-program-and-args s)))))) | |
1077 | (switch-to-buffer buffer) | |
1078 | (if (null width) (setq width (- (window-width (selected-window)) 1))) | |
1079 | (if (null height) (setq height (- (window-height (selected-window)) 1))) | |
1080 | (terminal-mode) | |
1081 | (setq te-width width te-height height) | |
1082 | (setq mode-line-buffer-identification | |
1083 | (list (format "Emacs terminal %dx%d: %%b " te-width te-height) | |
1084 | 'te-pending-output-info)) | |
1085 | (let ((buffer-read-only nil)) | |
1086 | (te-clear-screen)) | |
1087 | (let (process) | |
1088 | (while (setq process (get-buffer-process (current-buffer))) | |
1089 | (if (y-or-n-p (format "Kill process %s? " (process-name process))) | |
1090 | (delete-process process) | |
1091 | (error "Process %s not killed" (process-name process))))) | |
1092 | (condition-case err | |
1093 | (let ((termcap | |
1094 | ;; Because of Unix Brain Death(tm), we can't change | |
1095 | ;; the terminal type of a running process, and so | |
1096 | ;; terminal size and scrollability are wired-down | |
1097 | ;; at this point. ("Detach? What's that?") | |
1098 | (concat (format "emacs-virtual:co#%d:li#%d:%s" | |
1099 | ;; Sigh. These can't be dynamically changed. | |
1100 | te-width te-height (if terminal-scrolling | |
1101 | "" "ns:")) | |
1102 | ;;-- Basic things | |
1103 | ;; cursor-motion, bol, forward/backward char | |
1104 | "cm=^p=%+ %+ :cr=^p^a:le=^p^b:nd=^p^f:" | |
1105 | ;; newline, clear eof/eof, audible bell | |
1106 | "nw=^j:ce=^pc:cd=^pC:cl=^p^l:bl=^p^g:" | |
1107 | ;; insert/delete char/line | |
1108 | "IC=^p_%+ :DC=^pd%+ :AL=^p^o%+ :DL=^p^k%+ :" | |
1109 | ;;-- Not-widely-known (ie nonstandard) flags, which mean | |
1110 | ;; o writing in the last column of the last line | |
1111 | ;; doesn't cause idiotic scrolling, and | |
1112 | ;; o don't use idiotische c-s/c-q sogenannte | |
1113 | ;; ``flow control'' auf keinen Fall. | |
1114 | "LP:NF:" | |
1115 | ;;-- For stupid or obsolete programs | |
1116 | "ic=^p_!:dc=^pd!:al=^p^o!:dl=^p^k!:ho=^p= :" | |
1117 | ;;-- For disgusting programs. | |
1118 | ;; (VI? What losers need these, I wonder?) | |
1119 | "im=:ei=:dm=:ed=:mi:do=^p^j:nl=^p^j:bs:"))) | |
41f6016e RS |
1120 | (let ((process-environment |
1121 | (cons "TERM=emacs-virtual" | |
1122 | (cons (concat "TERMCAP=" termcap) | |
1123 | process-environment)))) | |
1124 | (setq te-process | |
1125 | (start-process "terminal-emulator" (current-buffer) | |
1126 | "/bin/sh" "-c" | |
1127 | ;; Yuck!!! Start a shell to set some terminal | |
1128 | ;; control characteristics. Then start the | |
1129 | ;; "env" program to setup the terminal type | |
1130 | ;; Then finally start the program we wanted. | |
1131 | (format "%s; exec %s" | |
1132 | te-stty-string | |
1133 | (mapconcat 'te-quote-arg-for-sh | |
1134 | (cons program args) " "))))) | |
1135 | (set-process-filter te-process 'te-filter) | |
1136 | (set-process-sentinel te-process 'te-sentinel)) | |
424751de | 1137 | (error (fundamental-mode) |
1138 | (signal (car err) (cdr err)))) | |
424751de | 1139 | (setq inhibit-quit t) ;sport death |
1140 | (use-local-map terminal-map) | |
1141 | (run-hooks 'terminal-mode-hook) | |
1142 | (message "Entering emacs terminal-emulator... Type %s %s for help" | |
1143 | (single-key-description terminal-escape-char) | |
1144 | (mapconcat 'single-key-description | |
1145 | (where-is-internal 'te-escape-help | |
1146 | terminal-escape-map | |
1147 | nil t) | |
1148 | " "))) | |
1149 | ||
1150 | ||
1151 | (defun te-parse-program-and-args (s) | |
1152 | (cond ((string-match "\\`\\([a-zA-Z0-9-+=_.@/:]+[ \t]*\\)+\\'" s) | |
1153 | (let ((l ()) (p 0)) | |
1154 | (while p | |
1155 | (setq l (cons (if (string-match | |
1156 | "\\([a-zA-Z0-9-+=_.@/:]+\\)\\([ \t]+\\)*" | |
1157 | s p) | |
1158 | (prog1 (substring s p (match-end 1)) | |
1159 | (setq p (match-end 0)) | |
1160 | (if (eql p (length s)) (setq p nil))) | |
1161 | (prog1 (substring s p) | |
1162 | (setq p nil))) | |
1163 | l))) | |
1164 | (setq l (nreverse l)) | |
1165 | (list (car l) (cdr l)))) | |
1166 | ((and (string-match "[ \t]" s) (not (file-exists-p s))) | |
1167 | (list shell-file-name (list "-c" (concat "exec " s)))) | |
1168 | (t (list s ())))) | |
1169 | ||
1170 | (put 'terminal-mode 'mode-class 'special) | |
1171 | ;; This is only separated out from function terminal-emulator | |
1172 | ;; to keep the latter a little more managable. | |
1173 | (defun terminal-mode () | |
1174 | "Set up variables for use f the terminal-emualtor. | |
1175 | One should not call this -- it is an internal function | |
1176 | of the terminal-emulator" | |
1177 | (kill-all-local-variables) | |
1178 | (buffer-disable-undo (current-buffer)) | |
1179 | (setq major-mode 'terminal-mode) | |
1180 | (setq mode-name "terminal") | |
1181 | ; (make-local-variable 'Helper-return-blurb) | |
1182 | ; (setq Helper-return-blurb "return to terminal simulator") | |
1183 | (setq mode-line-process '(": %s")) | |
1184 | (setq buffer-read-only t) | |
1185 | (setq truncate-lines t) | |
1186 | (make-local-variable 'terminal-escape-char) | |
1187 | (setq terminal-escape-char (default-value 'terminal-escape-char)) | |
1188 | (make-local-variable 'terminal-scrolling) | |
1189 | (setq terminal-scrolling (default-value 'terminal-scrolling)) | |
1190 | (make-local-variable 'terminal-more-processing) | |
1191 | (setq terminal-more-processing (default-value 'terminal-more-processing)) | |
1192 | (make-local-variable 'terminal-redisplay-interval) | |
1193 | (setq terminal-redisplay-interval (default-value 'terminal-redisplay-interval)) | |
1194 | (make-local-variable 'te-width) | |
1195 | (make-local-variable 'te-height) | |
1196 | (make-local-variable 'te-process) | |
1197 | (make-local-variable 'te-pending-output) | |
1198 | (setq te-pending-output (list 0)) | |
1199 | (make-local-variable 'te-saved-point) | |
1200 | (setq te-saved-point (point-min)) | |
1201 | (make-local-variable 'te-pending-output-info) ;for the mode line | |
1202 | (setq te-pending-output-info "") | |
1203 | (make-local-variable 'inhibit-quit) | |
1204 | ;(setq inhibit-quit t) | |
1205 | (make-local-variable 'te-log-buffer) | |
1206 | (setq te-log-buffer nil) | |
1207 | (make-local-variable 'te-more-count) | |
1208 | (setq te-more-count -1) | |
1209 | (make-local-variable 'te-redisplay-count) | |
1210 | (setq te-redisplay-count terminal-redisplay-interval) | |
424751de | 1211 | ;(use-local-map terminal-mode-map) |
1212 | ;; terminal-mode-hook is called above in function terminal-emulator | |
1213 | ) | |
1214 | \f | |
1215 | ;;;; what a complete loss | |
1216 | ||
1217 | (defun te-quote-arg-for-sh (string) | |
1218 | (cond ((string-match "\\`[a-zA-Z0-9-+=_.@/:]+\\'" | |
1219 | string) | |
1220 | string) | |
1221 | ((not (string-match "[$]" string)) | |
1222 | ;; "[\"\\]" are special to sh and the lisp reader in the same way | |
1223 | (prin1-to-string string)) | |
1224 | (t | |
1225 | (let ((harder "") | |
1226 | (start 0) | |
1227 | (end 0)) | |
1228 | (while (cond ((>= start (length string)) | |
1229 | nil) | |
1230 | ;; this is the set of chars magic with "..." in `sh' | |
1231 | ((setq end (string-match "[\"\\$]" | |
1232 | string start)) | |
1233 | t) | |
1234 | (t (setq harder (concat harder | |
1235 | (substring string start))) | |
1236 | nil)) | |
1237 | (setq harder (concat harder (substring string start end) | |
1238 | ;; Can't use ?\\ since `concat' | |
1239 | ;; unfortunately does prin1-to-string | |
1240 | ;; on fixna. Amazing. | |
1241 | "\\" | |
1242 | (substring string | |
1243 | end | |
1244 | (1+ end))) | |
1245 | start (1+ end))) | |
7229064d | 1246 | (concat "\"" harder "\""))))) |
49116ac0 JB |
1247 | |
1248 | (provide 'terminal) | |
d501f516 ER |
1249 | |
1250 | ;;; terminal.el ends here |