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