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[emacs.git] / lisp / terminal.el
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1 ;;; terminal.el --- terminal emulator for GNU Emacs
3 ;; Copyright (C) 1986,87,88,89,93,94 Free Software Foundation, Inc.
5 ;; Author: Richard Mlynarik <mly@eddie.mit.edu>
6 ;; Maintainer: FSF
7 ;; Keywords: comm, terminals
9 ;; This file is part of GNU Emacs.
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
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
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.
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 the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
26 ;;; Commentary:
28 ;;; This file has been censored by the Communications Decency Act.
29 ;;; That law was passed under the guise of a ban on pornography, but
30 ;;; it bans far more than that. This file did not contain pornography,
31 ;;; but it was censored nonetheless.
33 ;;; For information on US government censorship of the Internet, and
34 ;;; what you can do to bring back freedom of the press, see the web
35 ;;; site http://www.vtw.org/
37 ;;; Code:
39 ;;>>TODO
40 ;;>> ** Nothing can be done about emacs' meta-lossage **
41 ;;>> (without redoing keymaps `sanely' -- ask Mly for details)
43 ;;>> One probably wants to do setenv MORE -c when running with
44 ;;>> more-processing enabled.
46 (require 'ehelp)
48 (defgroup terminal nil
49 "Terminal emulator for Emacs."
50 :group 'terminals)
53 (defcustom terminal-escape-char ?\C-^
54 "*All characters except for this are passed verbatim through the
55 terminal-emulator. This character acts as a prefix for commands
56 to the emulator program itself. Type this character twice to send
57 it through the emulator. Type ? after typing it for a list of
58 possible commands.
59 This variable is local to each terminal-emulator buffer."
60 :type 'character
61 :group 'terminal)
63 (defcustom terminal-scrolling t ;;>> Setting this to t sort-of defeats my whole aim in writing this package...
64 "*If non-nil, the terminal-emulator will losingly `scroll' when output occurs
65 past the bottom of the screen. If nil, output will win and `wrap' to the top
66 of the screen.
67 This variable is local to each terminal-emulator buffer."
68 :type 'boolean
69 :group 'terminal)
71 (defcustom terminal-more-processing t
72 "*If non-nil, do more-processing.
73 This variable is local to each terminal-emulator buffer."
74 :type 'boolean
75 :group 'terminal)
77 ;; If you are the sort of loser who uses scrolling without more breaks
78 ;; and expects to actually see anything, you should probably set this to
79 ;; around 400
80 (defcustom terminal-redisplay-interval 5000
81 "*Maximum number of characters which will be processed by the
82 terminal-emulator before a screen redisplay is forced.
83 Set this to a large value for greater throughput,
84 set it smaller for more frequent updates but overall slower
85 performance."
86 :type 'integer
87 :group 'terminal)
89 (defvar terminal-more-break-insertion
90 "*** More break -- Press space to continue ***")
92 (defvar terminal-meta-map nil)
93 (if terminal-meta-map
94 nil
95 (let ((map (make-sparse-keymap)))
96 (define-key map [t] 'te-pass-through)
97 (setq terminal-meta-map map)))
99 (defvar terminal-map nil)
100 (if terminal-map
102 (let ((map (make-sparse-keymap)))
103 ;; Prevent defining [menu-bar] as te-pass-through
104 ;; so we allow the global menu bar to be visible.
105 (define-key map [menu-bar] (make-sparse-keymap))
106 (define-key map [t] 'te-pass-through)
107 (define-key map [switch-frame] 'handle-switch-frame)
108 (define-key map "\e" terminal-meta-map)
109 ;(define-key map "\C-l"
110 ; '(lambda () (interactive) (te-pass-through) (redraw-display)))
111 (setq terminal-map map)))
113 (defvar terminal-escape-map nil)
114 (if terminal-escape-map
116 (let ((map (make-sparse-keymap)))
117 (define-key map [t] 'undefined)
118 (let ((s "0"))
119 (while (<= (aref s 0) ?9)
120 (define-key map s 'digit-argument)
121 (aset s 0 (1+ (aref s 0)))))
122 (define-key map "b" 'switch-to-buffer)
123 (define-key map "o" 'other-window)
124 (define-key map "e" 'te-set-escape-char)
125 (define-key map "\C-l" 'redraw-display)
126 (define-key map "\C-o" 'te-flush-pending-output)
127 (define-key map "m" 'te-toggle-more-processing)
128 (define-key map "x" 'te-escape-extended-command)
129 ;;>> What use is this? Why is it in the default terminal-emulator map?
130 (define-key map "w" 'te-edit)
131 (define-key map "?" 'te-escape-help)
132 (define-key map (char-to-string help-char) 'te-escape-help)
133 (setq terminal-escape-map map)))
135 (defvar te-escape-command-alist nil)
136 (if te-escape-command-alist
138 (setq te-escape-command-alist
139 '(("Set Escape Character" . te-set-escape-char)
140 ;;>> What use is this? Why is it in the default terminal-emulator map?
141 ("Edit" . te-edit)
142 ("Refresh" . redraw-display)
143 ("Record Output" . te-set-output-log)
144 ("Photo" . te-set-output-log)
145 ("Tofu" . te-tofu) ;; confuse the uninitiated
146 ("Stuff Input" . te-stuff-string)
147 ("Flush Pending Output" . te-flush-pending-output)
148 ("Enable More Processing" . te-enable-more-processing)
149 ("Disable More Processing" . te-disable-more-processing)
150 ("Scroll at end of page" . te-do-scrolling)
151 ("Wrap at end of page" . te-do-wrapping)
152 ("Switch To Buffer" . switch-to-buffer)
153 ("Other Window" . other-window)
154 ("Kill Buffer" . kill-buffer)
155 ("Help" . te-escape-help)
156 ("Set Redisplay Interval" . te-set-redisplay-interval)
159 (defvar terminal-more-break-map nil)
160 (if terminal-more-break-map
162 (let ((map (make-sparse-keymap)))
163 (define-key map [t] 'te-more-break-unread)
164 (define-key map (char-to-string help-char) 'te-more-break-help)
165 (define-key map " " 'te-more-break-resume)
166 (define-key map "\C-l" 'redraw-display)
167 (define-key map "\C-o" 'te-more-break-flush-pending-output)
168 ;;>>> this isn't right
169 ;(define-key map "\^?" 'te-more-break-flush-pending-output) ;DEL
170 (define-key map "\r" 'te-more-break-advance-one-line)
172 (setq terminal-more-break-map map)))
175 ;;; Pacify the byte compiler
176 (defvar te-process nil)
177 (defvar te-log-buffer nil)
178 (defvar te-height nil)
179 (defvar te-width nil)
180 (defvar te-more-count nil)
181 (defvar te-redisplay-count nil)
182 (defvar te-pending-output nil)
183 (defvar te-saved-point)
184 (defvar te-more-old-point nil)
185 (defvar te-more-old-local-map nil)
186 (defvar te-more-old-filter nil)
187 (defvar te-more-old-mode-line-format nil)
188 (defvar te-pending-output-info nil)
190 ;; Required to support terminfo systems
191 (defconst te-terminal-name-prefix "emacs-em"
192 "Prefix used for terminal type names for Terminfo.")
193 (defconst te-terminfo-directory
194 (file-name-as-directory
195 (expand-file-name "emacs-terminfo" temporary-file-directory))
196 "Directory used for run-time terminal definition files for Terminfo.")
197 (defvar te-terminal-name nil)
199 ;;;; escape map
201 (defun te-escape ()
202 (interactive)
203 (let (s
204 (local (current-local-map))
205 (global (current-global-map)))
206 (unwind-protect
207 (progn
208 (use-global-map terminal-escape-map)
209 (use-local-map terminal-escape-map)
210 (setq s (read-key-sequence
211 (if current-prefix-arg
212 (format "Emacs Terminal escape> %d "
213 (prefix-numeric-value current-prefix-arg))
214 "Emacs Terminal escape> "))))
215 (use-global-map global)
216 (use-local-map local))
218 (message "")
220 (cond
221 ;; Certain keys give vector notation, like [escape] when
222 ;; you hit esc key...
223 ((and (stringp s)
224 (string= s (make-string 1 terminal-escape-char)))
225 (setq last-command-char terminal-escape-char)
226 (let ((terminal-escape-char -259))
227 (te-pass-through)))
229 ((setq s (lookup-key terminal-escape-map s))
230 (call-interactively s)))
235 (defun te-escape-help ()
236 "Provide help on commands available after terminal-escape-char is typed."
237 (interactive)
238 (message "Terminal emulator escape help...")
239 (let ((char (single-key-description terminal-escape-char)))
240 (with-electric-help
241 (function (lambda ()
242 (princ (format "Terminal-emulator escape, invoked by \"%s\"
243 Type \"%s\" twice to send a single \"%s\" through.
245 Other chars following \"%s\" are interpreted as follows:\n"
246 char char char char))
248 (princ (substitute-command-keys "\\{terminal-escape-map}\n"))
249 (princ (format "\nSubcommands of \"%s\" (%s)\n"
250 (where-is-internal 'te-escape-extended-command
251 terminal-escape-map t)
252 'te-escape-extended-command))
253 (let ((l (sort (copy-sequence te-escape-command-alist)
254 (function (lambda (a b)
255 (string< (car a) (car b)))))))
256 (while l
257 (let ((doc (or (documentation (cdr (car l)))
258 "Not documented")))
259 (if (string-match "\n" doc)
260 ;; just use first line of documentation
261 (setq doc (substring doc 0 (match-beginning 0))))
262 (princ " \"")
263 (princ (car (car l)))
264 (princ "\":\n ")
265 (princ doc)
266 (write-char ?\n))
267 (setq l (cdr l))))
268 nil)))))
272 (defun te-escape-extended-command ()
273 (interactive)
274 (let ((c (let ((completion-ignore-case t))
275 (completing-read "terminal command: "
276 te-escape-command-alist
277 nil t))))
278 (if c
279 (catch 'foo
280 (setq c (downcase c))
281 (let ((l te-escape-command-alist))
282 (while l
283 (if (string= c (downcase (car (car l))))
284 (throw 'foo (call-interactively (cdr (car l))))
285 (setq l (cdr l)))))))))
287 ;; not used.
288 (defun te-escape-extended-command-unread ()
289 (interactive)
290 (setq unread-command-events (listify-key-sequence (this-command-keys)))
291 (te-escape-extended-command))
293 (defun te-set-escape-char (c)
294 "Change the terminal-emulator escape character."
295 (interactive "cSet escape character to: ")
296 (let ((o terminal-escape-char))
297 (message (if (= o c)
298 "\"%s\" is the escape char"
299 "\"%s\" is now the escape; \"%s\" passes through")
300 (single-key-description c)
301 (single-key-description o))
302 (setq terminal-escape-char c)))
305 (defun te-stuff-string (string)
306 "Read a string to send to through the terminal emulator
307 as though that string had been typed on the keyboard.
309 Very poor man's file transfer protocol."
310 (interactive "sStuff string: ")
311 (process-send-string te-process string))
313 (defun te-set-output-log (name)
314 "Record output from the terminal emulator in a buffer."
315 (interactive (list (if te-log-buffer
317 (read-buffer "Record output in buffer: "
318 (format "%s output-log"
319 (buffer-name (current-buffer)))
320 nil))))
321 (if (or (null name) (equal name ""))
322 (progn (setq te-log-buffer nil)
323 (message "Output logging off."))
324 (if (get-buffer name)
326 (save-excursion
327 (set-buffer (get-buffer-create name))
328 (fundamental-mode)
329 (buffer-disable-undo (current-buffer))
330 (erase-buffer)))
331 (setq te-log-buffer (get-buffer name))
332 (message "Recording terminal emulator output into buffer \"%s\""
333 (buffer-name te-log-buffer))))
335 (defun te-tofu ()
336 "Discontinue output log."
337 (interactive)
338 (te-set-output-log nil))
341 (defun te-toggle (sym arg)
342 (set sym (cond ((not (numberp arg)) arg)
343 ((= arg 1) (not (symbol-value sym)))
344 ((< arg 0) nil)
345 (t t))))
347 (defun te-toggle-more-processing (arg)
348 (interactive "p")
349 (message (if (te-toggle 'terminal-more-processing arg)
350 "More processing on" "More processing off"))
351 (if terminal-more-processing (setq te-more-count -1)))
353 (defun te-toggle-scrolling (arg)
354 (interactive "p")
355 (message (if (te-toggle 'terminal-scrolling arg)
356 "Scroll at end of page" "Wrap at end of page")))
358 (defun te-enable-more-processing ()
359 "Enable ** MORE ** processing"
360 (interactive)
361 (te-toggle-more-processing t))
363 (defun te-disable-more-processing ()
364 "Disable ** MORE ** processing"
365 (interactive)
366 (te-toggle-more-processing nil))
368 (defun te-do-scrolling ()
369 "Scroll at end of page (yuck)"
370 (interactive)
371 (te-toggle-scrolling t))
373 (defun te-do-wrapping ()
374 "Wrap to top of window at end of page"
375 (interactive)
376 (te-toggle-scrolling nil))
379 (defun te-set-redisplay-interval (arg)
380 "Set the maximum interval (in output characters) between screen updates.
381 Set this number to large value for greater throughput,
382 set it smaller for more frequent updates (but overall slower performance."
383 (interactive "NMax number of output chars between redisplay updates: ")
384 (setq arg (max arg 1))
385 (setq terminal-redisplay-interval arg
386 te-redisplay-count 0))
388 ;;;; more map
390 ;; every command -must- call te-more-break-unwind
391 ;; or grave lossage will result
393 (put 'te-more-break-unread 'suppress-keymap t)
394 (defun te-more-break-unread ()
395 (interactive)
396 (if (eq last-input-char terminal-escape-char)
397 (call-interactively 'te-escape)
398 (message "Continuing from more break (\"%s\" typed, %d chars output pending...)"
399 (single-key-description last-input-char)
400 (te-pending-output-length))
401 (setq te-more-count 259259)
402 (te-more-break-unwind)
403 (let ((terminal-more-processing nil))
404 (te-pass-through))))
406 (defun te-more-break-resume ()
407 "Proceed past the **MORE** break,
408 allowing the next page of output to appear"
409 (interactive)
410 (message "Continuing from more break")
411 (te-more-break-unwind))
413 (defun te-more-break-help ()
414 "Provide help on commands available in a terminal-emulator **MORE** break"
415 (interactive)
416 (message "Terminal-emulator more break help...")
417 (sit-for 0)
418 (with-electric-help
419 (function (lambda ()
420 (princ "Terminal-emulator more break.\n\n")
421 (princ (format "Type \"%s\" (te-more-break-resume)\n%s\n"
422 (where-is-internal 'te-more-break-resume
423 terminal-more-break-map t)
424 (documentation 'te-more-break-resume)))
425 (princ (substitute-command-keys "\\{terminal-more-break-map}\n"))
426 (princ "Any other key is passed through to the program
427 running under the terminal emulator and disables more processing until
428 all pending output has been dealt with.")
429 nil))))
432 (defun te-more-break-advance-one-line ()
433 "Allow one more line of text to be output before doing another more break."
434 (interactive)
435 (setq te-more-count 1)
436 (te-more-break-unwind))
438 (defun te-more-break-flush-pending-output ()
439 "Discard any output which has been received by the terminal emulator but
440 not yet processed and then proceed from the more break."
441 (interactive)
442 (te-more-break-unwind)
443 (te-flush-pending-output))
445 (defun te-flush-pending-output ()
446 "Discard any as-yet-unprocessed output which has been received by
447 the terminal emulator."
448 (interactive)
449 ;; this could conceivably be confusing in the presence of
450 ;; escape-sequences spanning process-output chunks
451 (if (null (cdr te-pending-output))
452 (message "(There is no output pending)")
453 (let ((length (te-pending-output-length)))
454 (message "Flushing %d chars of pending output" length)
455 (setq te-pending-output
456 (list 0 (format "\n*** %d chars of pending output flushed ***\n"
457 length)))
458 (te-update-pending-output-display)
459 (te-process-output nil)
460 (sit-for 0))))
463 (defun te-pass-through ()
464 "Character is passed to the program running under the terminal emulator.
465 One characters is treated specially:
466 the terminal escape character (normally C-^)
467 lets you type a terminal emulator command."
468 (interactive)
469 (cond ((eq last-input-char terminal-escape-char)
470 (call-interactively 'te-escape))
472 ;; Convert `return' to C-m, etc.
473 (if (and (symbolp last-input-char)
474 (get last-input-char 'ascii-character))
475 (setq last-input-char (get last-input-char 'ascii-character)))
476 ;; Convert meta characters to 8-bit form for transmission.
477 (if (and (integerp last-input-char)
478 (not (zerop (logand last-input-char ?\M-\^@))))
479 (setq last-input-char (+ 128 (logand last-input-char 127))))
480 ;; Now ignore all but actual characters.
481 ;; (It ought to be possible to send through function
482 ;; keys as character sequences if we add a description
483 ;; to our termcap entry of what they should look like.)
484 (if (integerp last-input-char)
485 (progn
486 (and terminal-more-processing (null (cdr te-pending-output))
487 (te-set-more-count nil))
488 (send-string te-process (make-string 1 last-input-char))
489 (te-process-output t))
490 (message "Function key `%s' ignored"
491 (single-key-description last-input-char))))))
494 (defun te-set-window-start ()
495 (let* ((w (get-buffer-window (current-buffer)))
496 (h (if w (window-height w))))
497 (cond ((not w)) ; buffer not displayed
498 ((>= h (/ (- (point) (point-min)) (1+ te-width)))
499 ;; this is the normal case
500 (set-window-start w (point-min)))
501 ;; this happens if some vandal shrinks our window.
502 ((>= h (/ (- (point-max) (point)) (1+ te-width)))
503 (set-window-start w (- (point-max) (* h (1+ te-width)) -1)))
504 ;; I give up.
505 (t nil))))
507 (defun te-pending-output-length ()
508 (let ((length (car te-pending-output))
509 (tem (cdr te-pending-output)))
510 (while tem
511 (setq length (+ length (length (car tem))) tem (cdr tem)))
512 length))
514 ;;>> What use is this terminal-edit stuff anyway?
515 ;;>> If nothing else, it was written by somebody who didn't
516 ;;>> competently understand the terminal-emulator...
518 (defvar terminal-edit-map nil)
519 (if terminal-edit-map
521 (setq terminal-edit-map (make-sparse-keymap))
522 (define-key terminal-edit-map "\C-c\C-c" 'terminal-cease-edit))
524 ;; Terminal Edit mode is suitable only for specially formatted data.
525 (put 'terminal-edit-mode 'mode-class 'special)
527 (defun terminal-edit-mode ()
528 "Major mode for editing the contents of a terminal-emulator buffer.
529 The editing commands are the same as in Fundamental mode,
530 together with a command \\<terminal-edit-map>to return to terminal emulation: \\[terminal-cease-edit]."
531 (use-local-map terminal-edit-map)
532 (setq major-mode 'terminal-edit-mode)
533 (setq mode-name "Terminal Edit")
534 (setq mode-line-modified (default-value 'mode-line-modified))
535 (setq mode-line-process nil)
536 (run-hooks 'terminal-edit-mode-hook))
538 (defun te-edit ()
539 "Start editing the terminal emulator buffer with ordinary Emacs commands."
540 (interactive)
541 (terminal-edit-mode)
542 (force-mode-line-update)
543 ;; Make mode line update.
544 (if (eq (key-binding "\C-c\C-c") 'terminal-cease-edit)
545 (message "Editing: Type C-c C-c to return to Terminal")
546 (message "%s"
547 (substitute-command-keys
548 "Editing: Type \\[terminal-cease-edit] to return to Terminal"))))
550 (defun terminal-cease-edit ()
551 "Finish editing message; switch back to Terminal proper."
552 (interactive)
554 ;;>> emulator will blow out if buffer isn't exactly te-width x te-height
555 (let ((buffer-read-only nil))
556 (widen)
557 (let ((opoint (point-marker))
558 (width te-width)
559 (h (1- te-height)))
560 (goto-char (point-min))
561 (while (>= h 0)
562 (let ((p (point)))
563 (cond ((search-forward "\n" (+ p width) 'move)
564 (forward-char -1)
565 (insert-char ?\ (- width (- (point) p)))
566 (forward-char 1))
567 ((eobp)
568 (insert-char ?\ (- width (- (point) p))))
569 ((= (following-char) ?\n)
570 (forward-char 1))
572 (setq p (point))
573 (if (search-forward "\n" nil t)
574 (delete-region p (1- (point)))
575 (delete-region p (point-max))))))
576 (if (= h 0)
577 (if (not (eobp)) (delete-region (point) (point-max)))
578 (if (eobp) (insert ?\n)))
579 (setq h (1- h)))
580 (goto-char opoint)
581 (set-marker opoint nil nil)
582 (setq te-saved-point (point))
583 (setq te-redisplay-count 0)
584 (setq te-more-count -1)))
586 (setq mode-line-modified (default-value 'mode-line-modified))
587 (use-local-map terminal-map)
588 (setq major-mode 'terminal-mode)
589 (setq mode-name "terminal")
590 (setq mode-line-process '(":%s")))
592 ;;;; more break hair
594 (defun te-more-break ()
595 (te-set-more-count t)
596 (make-local-variable 'te-more-old-point)
597 (setq te-more-old-point (point))
598 (make-local-variable 'te-more-old-local-map)
599 (setq te-more-old-local-map (current-local-map))
600 (use-local-map terminal-more-break-map)
601 (make-local-variable 'te-more-old-filter)
602 (setq te-more-old-filter (process-filter te-process))
603 (make-local-variable 'te-more-old-mode-line-format)
604 (setq te-more-old-mode-line-format mode-line-format
605 mode-line-format (list "-- **MORE** "
606 mode-line-buffer-identification
607 "%-"))
608 (set-process-filter te-process
609 (function (lambda (process string)
610 (save-excursion
611 (set-buffer (process-buffer process))
612 (setq te-pending-output (nconc te-pending-output
613 (list string))))
614 (te-update-pending-output-display))))
615 (te-update-pending-output-display)
616 (if (eq (window-buffer (selected-window)) (current-buffer))
617 (message "More break "))
618 (or (eobp)
619 (null terminal-more-break-insertion)
620 (save-excursion
621 (forward-char 1)
622 (delete-region (point) (+ (point) te-width))
623 (insert terminal-more-break-insertion)))
624 (run-hooks 'terminal-more-break-hook)
625 (sit-for 0) ;get display to update
626 (throw 'te-process-output t))
628 (defun te-more-break-unwind ()
629 (use-local-map te-more-old-local-map)
630 (set-process-filter te-process te-more-old-filter)
631 (goto-char te-more-old-point)
632 (setq mode-line-format te-more-old-mode-line-format)
633 (force-mode-line-update)
634 (let ((buffer-read-only nil))
635 (cond ((eobp))
636 (terminal-more-break-insertion
637 (forward-char 1)
638 (delete-region (point)
639 (+ (point) (length terminal-more-break-insertion)))
640 (insert-char ?\ te-width)
641 (goto-char te-more-old-point)))
642 (setq te-more-old-point nil)
643 (let ((te-more-count 259259))
644 (te-newline)))
645 ;(sit-for 0)
646 (te-process-output t))
648 (defun te-set-more-count (newline)
649 (let ((line (/ (- (point) (point-min)) (1+ te-width))))
650 (if newline (setq line (1+ line)))
651 (cond ((= line te-height)
652 (setq te-more-count te-height))
653 ;>>>> something is strange. Investigate this!
654 ((= line (1- te-height))
655 (setq te-more-count te-height))
656 ((or (< line (/ te-height 2))
657 (> (- te-height line) 10))
658 ;; break at end of this page
659 (setq te-more-count (- te-height line)))
661 ;; migrate back towards top (ie bottom) of screen.
662 (setq te-more-count (- te-height
663 (if (> te-height 10) 2 1)))))))
666 ;;;; More or less straight-forward terminal escapes
668 ;; ^j, meaning `newline' to non-display programs.
669 ;; (Who would think of ever writing a system which doesn't understand
670 ;; display terminals natively? Un*x: The Operating System of the Future.)
671 (defun te-newline ()
672 "Move down a line, optionally do more processing, perhaps wrap/scroll,
673 move to start of new line, clear to end of line."
674 (end-of-line)
675 (cond ((not terminal-more-processing))
676 ((< (setq te-more-count (1- te-more-count)) 0)
677 (te-set-more-count t))
678 ((eq te-more-count 0)
679 ;; this doesn't return
680 (te-more-break)))
681 (if (eobp)
682 (progn
683 (delete-region (point-min) (+ (point-min) te-width))
684 (goto-char (point-min))
685 (if terminal-scrolling
686 (progn (delete-char 1)
687 (goto-char (point-max))
688 (insert ?\n))))
689 (forward-char 1)
690 (delete-region (point) (+ (point) te-width)))
691 (insert-char ?\ te-width)
692 (beginning-of-line)
693 (te-set-window-start))
695 ; ^p = x+32 y+32
696 (defun te-move-to-position ()
697 ;; must offset by #o40 since cretinous unix won't send a 004 char through
698 (let ((y (- (te-get-char) 32))
699 (x (- (te-get-char) 32)))
700 (if (or (> x te-width)
701 (> y te-height))
703 (goto-char (+ (point-min) x (* y (1+ te-width))))
704 ;(te-set-window-start?)
706 (setq te-more-count -1))
710 ;; ^p c
711 (defun te-clear-rest-of-line ()
712 (save-excursion
713 (let ((n (- (point) (progn (end-of-line) (point)))))
714 (delete-region (point) (+ (point) n))
715 (insert-char ?\ (- n)))))
718 ;; ^p C
719 (defun te-clear-rest-of-screen ()
720 (save-excursion
721 (te-clear-rest-of-line)
722 (while (progn (end-of-line) (not (eobp)))
723 (forward-char 1) (end-of-line)
724 (delete-region (- (point) te-width) (point))
725 (insert-char ?\ te-width))))
728 ;; ^p ^l
729 (defun te-clear-screen ()
730 ;; regenerate buffer to compensate for (nonexistent!!) bugs.
731 (erase-buffer)
732 (let ((i 0))
733 (while (< i te-height)
734 (setq i (1+ i))
735 (insert-char ?\ te-width)
736 (insert ?\n)))
737 (delete-region (1- (point-max)) (point-max))
738 (goto-char (point-min))
739 (setq te-more-count -1))
742 ;; ^p ^o count+32
743 (defun te-insert-lines ()
744 (if (not (bolp))
745 ();(error "fooI")
746 (save-excursion
747 (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1))
748 (n (min (- (te-get-char) ?\ ) line))
749 (i 0))
750 (delete-region (- (point-max) (* n (1+ te-width))) (point-max))
751 (if (eq (point) (point-max)) (insert ?\n))
752 (while (< i n)
753 (setq i (1+ i))
754 (insert-char ?\ te-width)
755 (or (eq i line) (insert ?\n))))))
756 (setq te-more-count -1))
759 ;; ^p ^k count+32
760 (defun te-delete-lines ()
761 (if (not (bolp))
762 ();(error "fooD")
763 (let* ((line (- te-height (/ (- (point) (point-min)) (1+ te-width)) -1))
764 (n (min (- (te-get-char) ?\ ) line))
765 (i 0))
766 (delete-region (point)
767 (min (+ (point) (* n (1+ te-width))) (point-max)))
768 (save-excursion
769 (goto-char (point-max))
770 (while (< i n)
771 (setq i (1+ i))
772 (insert-char ?\ te-width)
773 (or (eq i line) (insert ?\n))))))
774 (setq te-more-count -1))
776 ;; ^p ^a
777 (defun te-beginning-of-line ()
778 (beginning-of-line))
780 ;; ^p ^b
781 (defun te-backward-char ()
782 (if (not (bolp))
783 (backward-char 1)))
785 ;; ^p ^f
786 (defun te-forward-char ()
787 (if (not (eolp))
788 (forward-char 1)))
791 ;; 0177
792 (defun te-delete ()
793 (if (bolp)
795 (delete-region (1- (point)) (point))
796 (insert ?\ )
797 (forward-char -1)))
799 ;; ^p ^g
800 (defun te-beep ()
801 (beep))
804 ;; ^p _ count+32
805 (defun te-insert-spaces ()
806 (let* ((p (point))
807 (n (min (- (te-get-char) 32)
808 (- (progn (end-of-line) (point)) p))))
809 (if (<= n 0)
811 (delete-char (- n))
812 (goto-char p)
813 (insert-char ?\ n))
814 (goto-char p)))
816 ;; ^p d count+32 (should be ^p ^d but cretinous un*x won't send ^d chars!!!)
817 (defun te-delete-char ()
818 (let* ((p (point))
819 (n (min (- (te-get-char) 32)
820 (- (progn (end-of-line) (point)) p))))
821 (if (<= n 0)
823 (insert-char ?\ n)
824 (goto-char p)
825 (delete-char n))
826 (goto-char p)))
830 ;; disgusting unix-required excrement
831 ;; Are we living twenty years in the past yet?
833 (defun te-losing-unix ()
834 nil)
836 ;; ^i
837 (defun te-output-tab ()
838 (let* ((p (point))
839 (x (- p (progn (beginning-of-line) (point))))
840 (l (min (- 8 (logand x 7))
841 (progn (end-of-line) (- (point) p)))))
842 (goto-char (+ p l))))
844 ;; ^p ^j
845 ;; Handle the `do' or `nl' termcap capability.
846 ;;>> I am not sure why this broken, obsolete, capability is here.
847 ;;>> Perhaps it is for VIle. No comment was made about why it
848 ;;>> was added (in "Sun Dec 6 01:22:27 1987 Richard Stallman")
849 (defun te-down-vertically-or-scroll ()
850 "Move down a line vertically, or scroll at bottom."
851 (let ((column (current-column)))
852 (end-of-line)
853 (if (eobp)
854 (progn
855 (delete-region (point-min) (+ (point-min) te-width))
856 (goto-char (point-min))
857 (delete-char 1)
858 (goto-char (point-max))
859 (insert ?\n)
860 (insert-char ?\ te-width)
861 (beginning-of-line))
862 (forward-line 1))
863 (move-to-column column))
864 (te-set-window-start))
866 ;; Also:
867 ;; ^m => beginning-of-line (for which it -should- be using ^p ^a, right?!!)
868 ;; ^g => te-beep (for which it should use ^p ^g)
869 ;; ^h => te-backward-char (for which it should use ^p ^b)
873 (defun te-filter (process string)
874 (let* ((obuf (current-buffer)))
875 ;; can't use save-excursion, as that preserves point, which we don't want
876 (unwind-protect
877 (progn
878 (set-buffer (process-buffer process))
879 (goto-char te-saved-point)
880 (and (bufferp te-log-buffer)
881 (if (null (buffer-name te-log-buffer))
882 ;; killed
883 (setq te-log-buffer nil)
884 (set-buffer te-log-buffer)
885 (goto-char (point-max))
886 (insert-before-markers string)
887 (set-buffer (process-buffer process))))
888 (setq te-pending-output (nconc te-pending-output (list string)))
889 (te-update-pending-output-display)
890 (te-process-output (eq (current-buffer)
891 (window-buffer (selected-window))))
892 (set-buffer (process-buffer process))
893 (setq te-saved-point (point)))
894 (set-buffer obuf))))
896 ;; (A version of the following comment which might be distractingly offensive
897 ;; to some readers has been moved to term-nasty.el.)
898 ;; unix lacks ITS-style tty control...
899 (defun te-process-output (preemptible)
900 ;;>> There seems no good reason to ever disallow preemption
901 (setq preemptible t)
902 (catch 'te-process-output
903 (let ((buffer-read-only nil)
904 (string nil) ostring start char (matchpos nil))
905 (while (cdr te-pending-output)
906 (setq ostring string
907 start (car te-pending-output)
908 string (car (cdr te-pending-output))
909 char (aref string start))
910 (if (eq (setq start (1+ start)) (length string))
911 (progn (setq te-pending-output
912 (cons 0 (cdr (cdr te-pending-output)))
913 start 0
914 string (car (cdr te-pending-output)))
915 (te-update-pending-output-display))
916 (setcar te-pending-output start))
917 (if (and (> char ?\037) (< char ?\377))
918 (cond ((eolp)
919 ;; unread char
920 (if (eq start 0)
921 (setq te-pending-output
922 (cons 0 (cons (make-string 1 char)
923 (cdr te-pending-output))))
924 (setcar te-pending-output (1- start)))
925 (te-newline))
926 ((null string)
927 (delete-char 1) (insert char)
928 (te-redisplay-if-necessary 1))
930 (let ((end (or (and (eq ostring string) matchpos)
931 (setq matchpos (string-match
932 "[\000-\037\177-\377]"
933 string start))
934 (length string))))
935 (delete-char 1) (insert char)
936 (setq char (point)) (end-of-line)
937 (setq end (min end (+ start (- (point) char))))
938 (goto-char char)
939 (if (eq end matchpos) (setq matchpos nil))
940 (delete-region (point) (+ (point) (- end start)))
941 (insert (if (and (eq start 0)
942 (eq end (length string)))
943 string
944 (substring string start end)))
945 (if (eq end (length string))
946 (setq te-pending-output
947 (cons 0 (cdr (cdr te-pending-output))))
948 (setcar te-pending-output end))
949 (te-redisplay-if-necessary (1+ (- end start))))))
950 ;; I suppose if I split the guts of this out into a separate
951 ;; function we could trivially emulate different terminals
952 ;; Who cares in any case? (Apart from stupid losers using rlogin)
953 (funcall
954 (if (eq char ?\^p)
955 (or (cdr (assq (te-get-char)
956 '((?= . te-move-to-position)
957 (?c . te-clear-rest-of-line)
958 (?C . te-clear-rest-of-screen)
959 (?\C-o . te-insert-lines)
960 (?\C-k . te-delete-lines)
961 ;; not necessary, but help sometimes.
962 (?\C-a . te-beginning-of-line)
963 (?\C-b . te-backward-char)
964 ;; should be C-d, but un*x
965 ;; pty's won't send \004 through!
966 ;; Can you believe this?
967 (?d . te-delete-char)
968 (?_ . te-insert-spaces)
969 ;; random
970 (?\C-f . te-forward-char)
971 (?\C-g . te-beep)
972 (?\C-j . te-down-vertically-or-scroll)
973 (?\C-l . te-clear-screen)
975 'te-losing-unix)
976 (or (cdr (assq char
977 '((?\C-j . te-newline)
978 (?\177 . te-delete)
979 ;; Did I ask to be sent these characters?
980 ;; I don't remember doing so, either.
981 ;; (Perhaps some operating system or
982 ;; other is completely incompetent...)
983 (?\C-m . te-beginning-of-line)
984 (?\C-g . te-beep)
985 (?\C-h . te-backward-char)
986 (?\C-i . te-output-tab))))
987 'te-losing-unix)))
988 (te-redisplay-if-necessary 1))
989 (and preemptible
990 (input-pending-p)
991 ;; preemptible output! Oh my!!
992 (throw 'te-process-output t)))))
993 ;; We must update window-point in every window displaying our buffer
994 (walk-windows (lambda (w)
995 (when (and (not (eq w (selected-window)))
996 (eq (window-buffer w) (current-buffer)))
997 (set-window-point w (point))))))
999 (defun te-get-char ()
1000 (if (cdr te-pending-output)
1001 (let ((start (car te-pending-output))
1002 (string (car (cdr te-pending-output))))
1003 (prog1 (aref string start)
1004 (if (eq (setq start (1+ start)) (length string))
1005 (setq te-pending-output (cons 0 (cdr (cdr te-pending-output))))
1006 (setcar te-pending-output start))))
1007 (catch 'char
1008 (let ((filter (process-filter te-process)))
1009 (unwind-protect
1010 (progn
1011 (set-process-filter te-process
1012 (function (lambda (p s)
1013 (or (eq (length s) 1)
1014 (setq te-pending-output (list 1 s)))
1015 (throw 'char (aref s 0)))))
1016 (accept-process-output te-process))
1017 (set-process-filter te-process filter))))))
1020 (defun te-redisplay-if-necessary (length)
1021 (and (<= (setq te-redisplay-count (- te-redisplay-count length)) 0)
1022 (eq (current-buffer) (window-buffer (selected-window)))
1023 (waiting-for-user-input-p)
1024 (progn (te-update-pending-output-display)
1025 (sit-for 0)
1026 (setq te-redisplay-count terminal-redisplay-interval))))
1028 (defun te-update-pending-output-display ()
1029 (if (null (cdr te-pending-output))
1030 (setq te-pending-output-info "")
1031 (let ((length (te-pending-output-length)))
1032 (if (< length 1500)
1033 (setq te-pending-output-info "")
1034 (setq te-pending-output-info (format "(%dK chars output pending) "
1035 (/ (+ length 512) 1024))))))
1036 (force-mode-line-update))
1039 (defun te-sentinel (process message)
1040 (cond ((eq (process-status process) 'run))
1041 ((null (buffer-name (process-buffer process)))) ;deleted
1042 (t (let ((b (current-buffer)))
1043 (save-excursion
1044 (set-buffer (process-buffer process))
1045 (setq buffer-read-only nil)
1046 (fundamental-mode)
1047 (goto-char (point-max))
1048 (delete-blank-lines)
1049 (delete-horizontal-space)
1050 (insert "\n*******\n" message "*******\n"))
1051 (if (and (eq b (process-buffer process))
1052 (waiting-for-user-input-p))
1053 (progn (goto-char (point-max))
1054 (recenter -1)))))))
1056 (defvar te-stty-string "stty -nl erase '^?' kill '^u' intr '^c' echo pass8"
1057 "Shell command to set terminal modes for terminal emulator.")
1058 ;; This used to have `new' in it, but that loses outside BSD
1059 ;; and it's apparently not needed in BSD.
1061 (defcustom explicit-shell-file-name nil
1062 "*If non-nil, is file name to use for explicitly requested inferior shell."
1063 :type '(choice (const :tag "None" nil)
1064 file)
1065 :group 'terminal)
1067 ;;;###autoload
1068 (defun terminal-emulator (buffer program args &optional width height)
1069 "Under a display-terminal emulator in BUFFER, run PROGRAM on arguments ARGS.
1070 ARGS is a list of argument-strings. Remaining arguments are WIDTH and HEIGHT.
1071 BUFFER's contents are made an image of the display generated by that program,
1072 and any input typed when BUFFER is the current Emacs buffer is sent to that
1073 program as keyboard input.
1075 Interactively, BUFFER defaults to \"*terminal*\" and PROGRAM and ARGS
1076 are parsed from an input-string using your usual shell.
1077 WIDTH and HEIGHT are determined from the size of the current window
1078 -- WIDTH will be one less than the window's width, HEIGHT will be its height.
1080 To switch buffers and leave the emulator, or to give commands
1081 to the emulator itself (as opposed to the program running under it),
1082 type Control-^. The following character is an emulator command.
1083 Type Control-^ twice to send it to the subprogram.
1084 This escape character may be changed using the variable `terminal-escape-char'.
1086 `Meta' characters may not currently be sent through the terminal emulator.
1088 Here is a list of some of the variables which control the behaviour
1089 of the emulator -- see their documentation for more information:
1090 terminal-escape-char, terminal-scrolling, terminal-more-processing,
1091 terminal-redisplay-interval.
1093 This function calls the value of terminal-mode-hook if that exists
1094 and is non-nil after the terminal buffer has been set up and the
1095 subprocess started."
1096 (interactive
1097 (cons (save-excursion
1098 (set-buffer (get-buffer-create "*terminal*"))
1099 (buffer-name (if (or (not (boundp 'te-process))
1100 (null te-process)
1101 (not (eq (process-status te-process)
1102 'run)))
1103 (current-buffer)
1104 (generate-new-buffer "*terminal*"))))
1105 (append
1106 (let* ((default-s
1107 ;; Default shell is same thing M-x shell uses.
1108 (or explicit-shell-file-name
1109 (getenv "ESHELL")
1110 (getenv "SHELL")
1111 "/bin/sh"))
1112 (s (read-string
1113 (format "Run program in emulator: (default %s) "
1114 default-s))))
1115 (if (equal s "")
1116 (list default-s '())
1117 (te-parse-program-and-args s))))))
1118 (switch-to-buffer buffer)
1119 (if (null width) (setq width (- (window-width (selected-window)) 1)))
1120 (if (null height) (setq height (- (window-height (selected-window)) 1)))
1121 (terminal-mode)
1122 (setq te-width width te-height height)
1123 (setq te-terminal-name (concat te-terminal-name-prefix
1124 (number-to-string te-width)
1125 (number-to-string te-height)))
1126 (setq mode-line-buffer-identification
1127 (list (format "Emacs terminal %dx%d: %%b " te-width te-height)
1128 'te-pending-output-info))
1129 (let ((buffer-read-only nil))
1130 (te-clear-screen))
1131 (let (process)
1132 (while (setq process (get-buffer-process (current-buffer)))
1133 (if (y-or-n-p (format "Kill process %s? " (process-name process)))
1134 (delete-process process)
1135 (error "Process %s not killed" (process-name process)))))
1136 (condition-case err
1137 (let ((process-environment
1138 (cons (concat "TERM=" te-terminal-name)
1139 (cons (concat "TERMCAP=" (te-create-termcap))
1140 (cons (concat "TERMINFO=" (te-create-terminfo))
1141 process-environment)))))
1142 (setq te-process
1143 (start-process "terminal-emulator" (current-buffer)
1144 "/bin/sh" "-c"
1145 ;; Yuck!!! Start a shell to set some terminal
1146 ;; control characteristics. Then start the
1147 ;; "env" program to setup the terminal type
1148 ;; Then finally start the program we wanted.
1149 (format "%s; exec %s"
1150 te-stty-string
1151 (mapconcat 'te-quote-arg-for-sh
1152 (cons program args) " "))))
1153 (set-process-filter te-process 'te-filter)
1154 (set-process-sentinel te-process 'te-sentinel))
1155 (error (fundamental-mode)
1156 (signal (car err) (cdr err))))
1157 (setq inhibit-quit t) ;sport death
1158 (use-local-map terminal-map)
1159 (run-hooks 'terminal-mode-hook)
1160 (message "Entering emacs terminal-emulator... Type %s %s for help"
1161 (single-key-description terminal-escape-char)
1162 (mapconcat 'single-key-description
1163 (where-is-internal 'te-escape-help terminal-escape-map t)
1164 " ")))
1167 (defun te-parse-program-and-args (s)
1168 (cond ((string-match "\\`\\([-a-zA-Z0-9+=_.@/:]+[ \t]*\\)+\\'" s)
1169 (let ((l ()) (p 0))
1170 (while p
1171 (setq l (cons (if (string-match
1172 "\\([-a-zA-Z0-9+=_.@/:]+\\)\\([ \t]+\\)*"
1173 s p)
1174 (prog1 (substring s p (match-end 1))
1175 (setq p (match-end 0))
1176 (if (eq p (length s)) (setq p nil)))
1177 (prog1 (substring s p)
1178 (setq p nil)))
1179 l)))
1180 (setq l (nreverse l))
1181 (list (car l) (cdr l))))
1182 ((and (string-match "[ \t]" s) (not (file-exists-p s)))
1183 (list shell-file-name (list "-c" (concat "exec " s))))
1184 (t (list s ()))))
1186 (put 'terminal-mode 'mode-class 'special)
1187 ;; This is only separated out from function terminal-emulator
1188 ;; to keep the latter a little more manageable.
1189 (defun terminal-mode ()
1190 "Set up variables for use with the terminal-emulator.
1191 One should not call this -- it is an internal function
1192 of the terminal-emulator"
1193 (kill-all-local-variables)
1194 (buffer-disable-undo (current-buffer))
1195 (setq major-mode 'terminal-mode)
1196 (setq mode-name "terminal")
1197 ; (make-local-variable 'Helper-return-blurb)
1198 ; (setq Helper-return-blurb "return to terminal simulator")
1199 (setq mode-line-process '(":%s"))
1200 (setq buffer-read-only t)
1201 (setq truncate-lines t)
1202 (make-local-variable 'terminal-escape-char)
1203 (setq terminal-escape-char (default-value 'terminal-escape-char))
1204 (make-local-variable 'terminal-scrolling)
1205 (setq terminal-scrolling (default-value 'terminal-scrolling))
1206 (make-local-variable 'terminal-more-processing)
1207 (setq terminal-more-processing (default-value 'terminal-more-processing))
1208 (make-local-variable 'terminal-redisplay-interval)
1209 (setq terminal-redisplay-interval (default-value 'terminal-redisplay-interval))
1210 (make-local-variable 'te-width)
1211 (make-local-variable 'te-height)
1212 (make-local-variable 'te-process)
1213 (make-local-variable 'te-pending-output)
1214 (setq te-pending-output (list 0))
1215 (make-local-variable 'te-saved-point)
1216 (setq te-saved-point (point-min))
1217 (make-local-variable 'te-pending-output-info) ;for the mode line
1218 (setq te-pending-output-info "")
1219 (make-local-variable 'inhibit-quit)
1220 ;(setq inhibit-quit t)
1221 (make-local-variable 'te-log-buffer)
1222 (setq te-log-buffer nil)
1223 (make-local-variable 'te-more-count)
1224 (setq te-more-count -1)
1225 (make-local-variable 'te-redisplay-count)
1226 (setq te-redisplay-count terminal-redisplay-interval)
1227 ;(use-local-map terminal-mode-map)
1228 ;; terminal-mode-hook is called above in function terminal-emulator
1231 ;;;; what a complete loss
1233 (defun te-quote-arg-for-sh (string)
1234 (cond ((string-match "\\`[-a-zA-Z0-9+=_.@/:]+\\'"
1235 string)
1236 string)
1237 ((not (string-match "[$]" string))
1238 ;; "[\"\\]" are special to sh and the lisp reader in the same way
1239 (prin1-to-string string))
1241 (let ((harder "")
1242 (start 0)
1243 (end 0))
1244 (while (cond ((>= start (length string))
1245 nil)
1246 ;; this is the set of chars magic with "..." in `sh'
1247 ((setq end (string-match "[\"\\$]"
1248 string start))
1250 (t (setq harder (concat harder
1251 (substring string start)))
1252 nil))
1253 (setq harder (concat harder (substring string start end)
1254 ;; Can't use ?\\ since `concat'
1255 ;; unfortunately does prin1-to-string
1256 ;; on fixna. Amazing.
1257 "\\"
1258 (substring string
1260 (1+ end)))
1261 start (1+ end)))
1262 (concat "\"" harder "\"")))))
1264 (defun te-create-terminfo ()
1265 "Create and compile a terminfo entry for the virtual terminal. This is kept
1266 in the directory specified by `te-terminfo-directory'."
1267 (when (and system-uses-terminfo
1268 (not (file-exists-p (concat te-terminfo-directory
1269 (substring te-terminal-name-prefix 0 1)
1270 "/" te-terminal-name))))
1271 (let ( (terminfo
1272 (concat
1273 ;; The first newline avoids trouble with ncurses.
1274 (format "%s,\n\tmir, xon,cols#%d, lines#%d,"
1275 te-terminal-name te-width te-height)
1276 "bel=^P^G, clear=^P\\f, cr=^P^A, cub1=^P^B, cud1=^P\\n,"
1277 "cuf1=^P^F, cup=^P=%p1%'\\s'%+%c%p2%'\\s'%+%c,"
1278 "dch=^Pd%p1%'\\s'%+%c, dch1=^Pd!, dl=^P^K%p1%'\\s'%+%c,"
1279 "dl1=^P^K!, ed=^PC, el=^Pc, home=^P=\\s\\s,"
1280 "ich=^P_%p1%'\\s'%+%c, ich1=^P_!, il=^P^O%p1%'\\s'%+%c,"
1281 ;; The last newline avoids trouble with ncurses.
1282 "il1=^P^O!, ind=^P\\n, nel=\\n,\n"))
1283 ;; This is the desired name for the source file.
1284 (file-name (concat te-terminfo-directory te-terminal-name ".tif")) )
1285 (make-directory te-terminfo-directory t)
1286 (let ((temp-file
1287 (make-temp-file (expand-file-name "tif" te-terminfo-directory))))
1288 ;; Store the source file under a random temp name.
1289 (with-temp-file temp-file
1290 (insert terminfo))
1291 ;; Rename it to the desired name.
1292 ;; We use this roundabout approach
1293 ;; to avoid any risk of writing a name that
1294 ;; was michievouslyt set up as a symlink.
1295 (rename-file temp-file file-name))
1296 ;; Now compile that source to make the binary that the
1297 ;; programs actually use.
1298 (let ((process-environment
1299 (cons (concat "TERMINFO="
1300 (directory-file-name te-terminfo-directory))
1301 process-environment)))
1302 (set-process-sentinel (start-process "tic" nil "tic" file-name)
1303 'te-tic-sentinel))))
1304 (directory-file-name te-terminfo-directory))
1306 (defun te-create-termcap ()
1307 "Create a termcap entry for the virtual terminal"
1308 ;; Because of Unix Brain Death(tm), we can't change
1309 ;; the terminal type of a running process, and so
1310 ;; terminal size and scrollability are wired-down
1311 ;; at this point. ("Detach? What's that?")
1312 (concat (format "%s:co#%d:li#%d:%s"
1313 ;; Sigh. These can't be dynamically changed.
1314 te-terminal-name te-width te-height (if terminal-scrolling
1315 "" "ns:"))
1316 ;;-- Basic things
1317 ;; cursor-motion, bol, forward/backward char
1318 "cm=^p=%+ %+ :cr=^p^a:le=^p^b:nd=^p^f:"
1319 ;; newline, clear eof/eof, audible bell
1320 "nw=^j:ce=^pc:cd=^pC:cl=^p^l:bl=^p^g:"
1321 ;; insert/delete char/line
1322 "IC=^p_%+ :DC=^pd%+ :AL=^p^o%+ :DL=^p^k%+ :"
1323 ;;-- Not-widely-known (ie nonstandard) flags, which mean
1324 ;; o writing in the last column of the last line
1325 ;; doesn't cause idiotic scrolling, and
1326 ;; o don't use idiotische c-s/c-q sogenannte
1327 ;; ``flow control'' auf keinen Fall.
1328 "LP:NF:"
1329 ;;-- For stupid or obsolete programs
1330 "ic=^p_!:dc=^pd!:al=^p^o!:dl=^p^k!:ho=^p= :"
1331 ;;-- For disgusting programs.
1332 ;; (VI? What losers need these, I wonder?)
1333 "im=:ei=:dm=:ed=:mi:do=^p^j:nl=^p^j:bs:")
1336 (defun te-tic-sentinel (proc state-change)
1337 "If tic has finished, delete the .tif file"
1338 (if (equal state-change "finished
1340 (delete-file (concat te-terminfo-directory te-terminal-name ".tif"))))
1342 (provide 'terminal)
1344 ;;; terminal.el ends here