| blob | 7407392e021ed01166949735f0c24f1dcc69db85 |
1 ;;; comint.el --- general command interpreter in a window stuff -*- lexical-binding: t -*-
3 ;; Copyright (C) 1988, 1990, 1992-2014 Free Software Foundation, Inc.
5 ;; Author: Olin Shivers <shivers@cs.cmu.edu>
6 ;; Simon Marshall <simon@gnu.org>
7 ;; Maintainer: FSF
8 ;; Keywords: processes
9 ;; Package: emacs
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software: you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation, either version 3 of the License, or
16 ;; (at your option) any later version.
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;;; Commentary:
28 ;; This file defines a general command-interpreter-in-a-buffer package
29 ;; (comint mode). The idea is that you can build specific process-in-a-buffer
30 ;; modes on top of comint mode -- e.g., Lisp, shell, scheme, T, soar, ....
31 ;; This way, all these specific packages share a common base functionality,
32 ;; and a common set of bindings, which makes them easier to use (and
33 ;; saves code, implementation time, etc., etc.).
35 ;; Several packages are already defined using comint mode:
36 ;; - shell.el defines a shell-in-a-buffer mode.
37 ;; - cmulisp.el defines a simple lisp-in-a-buffer mode.
38 ;;
39 ;; - The file cmuscheme.el defines a scheme-in-a-buffer mode.
40 ;; - The file tea.el tunes scheme and inferior-scheme modes for T.
41 ;; - The file soar.el tunes Lisp and inferior-lisp modes for Soar.
42 ;; - cmutex.el defines TeX and LaTeX modes that invoke TeX, LaTeX, BibTeX,
43 ;; previewers, and printers from within Emacs.
44 ;; - background.el allows csh-like job control inside Emacs.
45 ;; It is pretty easy to make new derived modes for other processes.
47 ;; For documentation on the functionality provided by Comint mode, and
48 ;; the hooks available for customizing it, see the comments below.
49 ;; For further information on the standard derived modes (shell,
50 ;; inferior-lisp, inferior-scheme, ...), see the relevant source files.
52 ;; For hints on converting existing process modes (e.g., tex-mode,
53 ;; background, dbx, gdb, kermit, prolog, telnet) to use comint-mode
54 ;; instead of shell-mode, see the notes at the end of this file.
56 \f
57 ;; Brief Command Documentation:
58 ;;============================================================================
59 ;; Comint Mode Commands: (common to all derived modes, like shell & cmulisp
60 ;; mode)
61 ;;
62 ;; M-p comint-previous-input Cycle backwards in input history
63 ;; M-n comint-next-input Cycle forwards
64 ;; M-r comint-history-isearch-backward-regexp Isearch input regexp backward
65 ;; M-C-l comint-show-output Show last batch of process output
66 ;; RET comint-send-input
67 ;; C-d comint-delchar-or-maybe-eof Delete char unless at end of buff
68 ;; C-c C-a comint-bol-or-process-mark First time, move point to bol;
69 ;; second time, move to process-mark.
70 ;; C-c C-u comint-kill-input ^u
71 ;; C-c C-w backward-kill-word ^w
72 ;; C-c C-c comint-interrupt-subjob ^c
73 ;; C-c C-z comint-stop-subjob ^z
74 ;; C-c C-\ comint-quit-subjob ^\
75 ;; C-c C-o comint-delete-output Delete last batch of process output
76 ;; C-c C-r comint-show-output Show last batch of process output
77 ;; C-c C-l comint-dynamic-list-input-ring List input history
78 ;;
79 ;; Not bound by default in comint-mode (some are in shell mode)
80 ;; comint-run Run a program under comint-mode
81 ;; send-invisible Read a line w/o echo, and send to proc
82 ;; comint-dynamic-complete-filename Complete filename at point.
83 ;; comint-dynamic-list-filename-completions List completions in help buffer.
84 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
85 ;; replace with expanded/completed name.
86 ;; comint-replace-by-expanded-history Expand history at point;
87 ;; replace with expanded name.
88 ;; comint-magic-space Expand history and add (a) space(s).
89 ;; comint-kill-subjob No mercy.
90 ;; comint-show-maximum-output Show as much output as possible.
91 ;; comint-continue-subjob Send CONT signal to buffer's process
92 ;; group. Useful if you accidentally
93 ;; suspend your process (with C-c C-z).
94 ;; comint-get-next-from-history Fetch successive input history lines
95 ;; comint-accumulate Combine lines to send them together
96 ;; as input.
97 ;; comint-goto-process-mark Move point to where process-mark is.
98 ;; comint-set-process-mark Set process-mark to point.
100 ;; comint-mode-hook is the Comint mode hook. Basically for your keybindings.
102 ;;; Code:
107 \f
108 ;; Buffer Local Variables:
109 ;;============================================================================
110 ;; Comint mode buffer local variables:
111 ;; comint-prompt-regexp string comint-bol uses to match prompt
112 ;; comint-delimiter-argument-list list For delimiters and arguments
113 ;; comint-last-input-start marker Handy if inferior always echoes
114 ;; comint-last-input-end marker For comint-delete-output command
115 ;; comint-input-ring-size integer For the input history
116 ;; comint-input-ring ring mechanism
117 ;; comint-input-ring-index number ...
118 ;; comint-save-input-ring-index number ...
119 ;; comint-input-autoexpand symbol ...
120 ;; comint-input-ignoredups boolean ...
121 ;; comint-dynamic-complete-functions hook For the completion mechanism
122 ;; comint-completion-fignore list ...
123 ;; comint-file-name-chars string ...
124 ;; comint-file-name-quote-list list ...
125 ;; comint-get-old-input function Hooks for specific
126 ;; comint-input-filter-functions hook process-in-a-buffer
127 ;; comint-output-filter-functions hook function modes.
128 ;; comint-preoutput-filter-functions hook
129 ;; comint-input-filter function ...
130 ;; comint-input-sender function ...
131 ;; comint-eol-on-send boolean ...
132 ;; comint-process-echoes boolean ...
133 ;; comint-scroll-to-bottom-on-input symbol For scroll behavior
134 ;; comint-move-point-for-output symbol ...
135 ;; comint-scroll-show-maximum-output boolean ...
136 ;; comint-accum-marker maker For comint-accumulate
137 ;;
138 ;; Comint mode non-buffer local variables:
139 ;; comint-completion-addsuffix boolean/cons For file name
140 ;; comint-completion-autolist boolean completion behavior
141 ;; comint-completion-recexact boolean ...
144 "General command interpreter in a window stuff."
148 "Completion facilities in comint."
151 ;; Unused.
152 ;;; (defgroup comint-source nil
153 ;;; "Source finding facilities in comint."
154 ;;; :prefix "comint-"
155 ;;; :group 'comint)
158 "Regexp to recognize prompts in the inferior process.
161 This variable is only used if the variable
162 `comint-use-prompt-regexp' is non-nil.
164 Good choices:
175 "If non-nil, the comint prompt is read only.
176 The read only region includes the newline before the prompt.
177 This does not affect existing prompts.
178 Certain derived modes may override this option.
180 If you set this option to t, then the safe way to temporarily
181 override the read-only-ness of comint prompts is to call
182 `comint-kill-whole-line' or `comint-kill-region' with no
183 narrowing in effect. This way you will be certain that none of
184 the remaining prompts will be accidentally messed up. You may
185 wish to put something like the following in your init file:
187 \(add-hook 'comint-mode-hook
188 (lambda ()
190 (define-key comint-mode-map [C-S-backspace]
191 'comint-kill-whole-line)))
193 If you sometimes use comint-mode on text-only terminals or with `emacs -nw',
194 you might wish to use another binding for `comint-kill-whole-line'."
200 "List of characters to recognize as separate arguments in input.
201 Strings comprising a character in this list will separate the arguments
202 surrounding them, and also be regarded as arguments in their own right (unlike
203 whitespace). See `comint-arguments'.
204 Defaults to the empty list.
211 "If non-nil, expand input command history references on completion.
212 This mirrors the optional behavior of tcsh (its autoexpand and histlist).
214 If the value is `input', then the expansion is seen on input.
215 If the value is `history', then the expansion is only when inserting
216 into the buffer's input ring. See also `comint-magic-space' and
217 `completion-at-point'.
219 This variable is buffer-local."
227 "Face to use to highlight user input."
232 "Face to use to highlight prompts."
236 "If non-nil, don't add input matching the last on the input ring.
237 This mirrors the optional behavior of bash.
239 This variable is buffer-local."
244 "If non-nil, name of the file to read/write input history.
245 See also `comint-read-input-ring' and `comint-write-input-ring'.
246 `comint-mode' makes this a buffer-local variable. You probably want
247 to set this in a mode hook, rather than customize the default value."
249 file)
253 "Controls whether input to interpreter causes window to scroll.
254 If nil, then do not scroll. If t or `all', scroll all windows showing buffer.
255 If `this', scroll only the selected window.
257 The default is nil.
259 See `comint-preinput-scroll-to-bottom'. This variable is buffer-local."
267 "Controls whether interpreter output moves point to the end of the output.
268 If nil, then output never moves point to the output.
269 (If the output occurs at point, it is inserted before point.)
270 If t or `all', move point in all windows showing the buffer.
271 If `this', move point only the selected window.
272 If `others', move point only in other windows, not in the selected window.
274 The default is nil.
276 See the variable `comint-scroll-show-maximum-output' and the function
277 `comint-postoutput-scroll-to-bottom'.
278 This variable is buffer-local in all Comint buffers."
289 "Controls how to scroll due to interpreter output.
290 This variable applies when point is at the end of the buffer
291 \(either because it was originally there, or because
292 `comint-move-point-for-output' said to move it there)
293 and output from the subprocess is inserted.
295 Non-nil means scroll so that the window is full of text
296 and point is on the last line. A value of nil
297 means don't do anything special--scroll normally.
299 See also the variable `comint-move-point-for-output' and the function
300 `comint-postoutput-scroll-to-bottom'.
301 This variable is buffer-local in all Comint buffers."
306 "The maximum size in lines for Comint buffers.
307 Comint buffers are truncated from the top to be no greater than this number, if
308 the function `comint-truncate-buffer' is on `comint-output-filter-functions'."
313 "Size of the input history ring in `comint-mode'."
325 "If non-nil, assume that the subprocess echoes any input.
326 If so, delete one copy of the input so that only one copy eventually
327 appears in the buffer.
329 This variable is buffer-local."
333 ;; AIX puts the name of the person being su'd to in front of the prompt.
334 ;; kinit prints a prompt like `Password for devnull@GNU.ORG: '.
335 ;; ksu prints a prompt like `Kerberos password for devnull/root@GNU.ORG: '.
336 ;; ssh-add prints a prompt like `Enter passphrase: '.
337 ;; plink prints a prompt like `Passphrase for key "root@GNU.ORG": '.
338 ;; Ubuntu's sudo prompts like `[sudo] password for user:'
339 ;; Some implementations of passwd use "Password (again)" as the 2nd prompt.
340 ;; Something called "perforce" uses "Enter password:".
341 ;; See M-x comint-testsuite--test-comint-password-prompt-regexp.
355 "Regexp matching prompts for passwords in the inferior process.
356 This is used by `comint-watch-for-password-prompt'."
361 ;; Here are the per-interpreter hooks.
363 "Function that returns old text in Comint mode.
364 This function is called when return is typed while the point is in old
365 text. It returns the text to be submitted as process input. The
366 default is `comint-get-old-input-default', which either grabs the
367 current input field or grabs the current line and strips off leading
368 text matching `comint-prompt-regexp', depending on the value of
373 "List of functions called to perform completion.
374 Works like `completion-at-point-functions'.
375 See also `completion-at-point'.
381 "Predicate for filtering additions to input history.
382 Takes one argument, the input. If non-nil, the input may be saved on the input
386 "Abnormal hook run before input is sent to the process.
389 ;;;###autoload
390 (defvar comint-output-filter-functions '(ansi-color-process-output comint-postoutput-scroll-to-bottom comint-watch-for-password-prompt)
391 "Functions to call after output is inserted into the buffer.
392 One possible function is `comint-postoutput-scroll-to-bottom'.
393 These functions get one argument, a string containing the text as originally
394 inserted. Note that this might not be the same as the buffer contents between
395 `comint-last-output-start' and the buffer's `process-mark', if other filter
396 functions have already modified the buffer.
398 See also `comint-preoutput-filter-functions'.
400 You can use `add-hook' to add functions to this list
407 "Function to actually send to PROCESS the STRING submitted by user.
408 Usually this is just `comint-simple-send', but if your mode needs to
409 massage the input string, put a different function here.
410 `comint-simple-send' just sends the string plus a newline.
411 \(If `comint-input-sender-no-newline' is non-nil, it omits the newline.)
415 "Non-nil means go to the end of the line before sending input.
416 See `comint-send-input'."
423 ;; Note: If it is decided to purge comint-prompt-regexp from the source
424 ;; entirely, searching for uses of this variable will help to identify
425 ;; places that need attention.
427 "If non-nil, use `comint-prompt-regexp' to recognize prompts.
428 If nil, then program output and user-input are given different `field'
429 properties, which Emacs commands can use to distinguish them (in
430 particular, common movement commands such as `beginning-of-line'
431 respect field boundaries in a natural way)."
436 "Hook run upon entry to `comint-mode'.
437 This is run before the process is cranked up."
442 "Hook run each time a process is exec'd by `comint-exec'.
443 This is called after the process is cranked up. It is useful for things that
444 must be done each time a process is executed in a Comint mode buffer (e.g.,
445 `(process-kill-without-query)'). In contrast, the `comint-mode-hook' is only
446 executed once when the buffer is created."
452 ;; Keys:
463 ;; The following two are standardly bound to delete-forward-char,
464 ;; but they should never do EOF, just delete.
466 (define-key map [kp-delete] 'delete-forward-char)
467 (define-key map "\C-c " 'comint-accumulate)
468 (define-key map "\C-c\C-x" 'comint-get-next-from-history)
469 (define-key map "\C-c\C-a" 'comint-bol-or-process-mark)
470 (define-key map "\C-c\C-u" 'comint-kill-input)
471 (define-key map "\C-c\C-w" 'backward-kill-word)
472 (define-key map "\C-c\C-c" 'comint-interrupt-subjob)
473 (define-key map "\C-c\C-z" 'comint-stop-subjob)
475 (define-key map "\C-c\C-m" 'comint-copy-old-input)
476 (define-key map "\C-c\C-o" 'comint-delete-output)
477 (define-key map "\C-c\C-r" 'comint-show-output)
478 (define-key map "\C-c\C-e" 'comint-show-maximum-output)
479 (define-key map "\C-c\C-l" 'comint-dynamic-list-input-ring)
480 (define-key map "\C-c\C-n" 'comint-next-prompt)
481 (define-key map "\C-c\C-p" 'comint-previous-prompt)
482 (define-key map "\C-c\C-d" 'comint-send-eof)
483 (define-key map "\C-c\C-s" 'comint-write-output)
484 (define-key map "\C-c." 'comint-insert-previous-argument)
485 ;; Mouse Buttons:
486 (define-key map [mouse-2] 'comint-insert-input)
487 ;; Menu bars:
488 ;; completion:
489 (define-key map [menu-bar completion]
490 (cons "Complete" (make-sparse-keymap "Complete")))
491 (define-key map [menu-bar completion complete-expand]
492 '("Expand File Name" . comint-replace-by-expanded-filename))
493 (define-key map [menu-bar completion complete-listing]
494 '("File Completion Listing" . comint-dynamic-list-filename-completions))
495 (define-key map [menu-bar completion complete-file]
496 '("Complete File Name" . comint-dynamic-complete-filename))
497 (define-key map [menu-bar completion complete]
498 '("Complete at Point" . completion-at-point))
499 ;; Input history:
500 (define-key map [menu-bar inout]
501 (cons "In/Out" (make-sparse-keymap "In/Out")))
502 (define-key map [menu-bar inout delete-output]
503 '("Delete Current Output Group" . comint-delete-output))
504 (define-key map [menu-bar inout append-output-to-file]
505 '("Append Current Output Group to File" . comint-append-output-to-file))
506 (define-key map [menu-bar inout write-output]
507 '("Write Current Output Group to File" . comint-write-output))
508 (define-key map [menu-bar inout next-prompt]
509 '("Forward Output Group" . comint-next-prompt))
510 (define-key map [menu-bar inout previous-prompt]
511 '("Backward Output Group" . comint-previous-prompt))
512 (define-key map [menu-bar inout show-maximum-output]
513 '("Show Maximum Output" . comint-show-maximum-output))
514 (define-key map [menu-bar inout show-output]
515 '("Show Current Output Group" . comint-show-output))
516 (define-key map [menu-bar inout kill-input]
517 '("Kill Current Input" . comint-kill-input))
518 (define-key map [menu-bar inout copy-input]
519 '("Copy Old Input" . comint-copy-old-input))
520 (define-key map [menu-bar inout history-isearch-backward-regexp]
521 '("Isearch Input Regexp Backward..." . comint-history-isearch-backward-regexp))
522 (define-key map [menu-bar inout history-isearch-backward]
523 '("Isearch Input String Backward..." . comint-history-isearch-backward))
524 (define-key map [menu-bar inout forward-matching-history]
525 '("Forward Matching Input..." . comint-forward-matching-input))
526 (define-key map [menu-bar inout backward-matching-history]
527 '("Backward Matching Input..." . comint-backward-matching-input))
528 (define-key map [menu-bar inout next-matching-history]
529 '("Next Matching Input..." . comint-next-matching-input))
530 (define-key map [menu-bar inout previous-matching-history]
531 '("Previous Matching Input..." . comint-previous-matching-input))
532 (define-key map [menu-bar inout next-matching-history-from-input]
533 '("Next Matching Current Input" . comint-next-matching-input-from-input))
534 (define-key map [menu-bar inout previous-matching-history-from-input]
535 '("Previous Matching Current Input" . comint-previous-matching-input-from-input))
536 (define-key map [menu-bar inout next-history]
537 '("Next Input" . comint-next-input))
538 (define-key map [menu-bar inout previous-history]
539 '("Previous Input" . comint-previous-input))
540 (define-key map [menu-bar inout list-history]
541 '("List Input History" . comint-dynamic-list-input-ring))
542 (define-key map [menu-bar inout expand-history]
543 '("Expand History Before Point" . comint-replace-by-expanded-history))
544 ;; Signals
545 (let ((signals-map (make-sparse-keymap "Signals")))
546 (define-key map [menu-bar signals] (cons "Signals" signals-map))
547 (define-key signals-map [eof] '("EOF" . comint-send-eof))
548 (define-key signals-map [kill] '("KILL" . comint-kill-subjob))
549 (define-key signals-map [quit] '("QUIT" . comint-quit-subjob))
550 (define-key signals-map [cont] '("CONT" . comint-continue-subjob))
551 (define-key signals-map [stop] '("STOP" . comint-stop-subjob))
552 (define-key signals-map [break] '("BREAK" . comint-interrupt-subjob)))
553 ;; Put them in the menu bar:
554 (setq menu-bar-final-items (append '(completion inout signals)
555 menu-bar-final-items))
556 map))
558 ;; Fixme: Is this still relevant?
559 (defvar comint-ptyp t
560 "Non-nil if communications via pty; false if by pipe. Buffer local.
561 This is to work around a bug in Emacs process signaling.")
563 (defvar comint-input-ring nil)
564 (defvar comint-last-input-start nil)
565 (defvar comint-last-input-end nil)
566 (defvar comint-last-output-start nil)
567 (defvar comint-input-ring-index nil
568 "Index of last matched history element.")
569 (defvar comint-matching-input-from-input-string ""
570 "Input previously used to match input history.")
571 (defvar comint-save-input-ring-index nil
572 "Last input ring index which you copied.
575 (defvar comint-accum-marker nil
576 "Non-nil if you are accumulating input lines to send as input together.
579 (defvar comint-stored-incomplete-input nil
580 "Stored input for history cycling.")
582 (put 'comint-replace-by-expanded-history 'menu-enable 'comint-input-autoexpand)
583 (put 'comint-input-ring 'permanent-local t)
584 (put 'comint-input-ring-index 'permanent-local t)
585 (put 'comint-save-input-ring-index 'permanent-local t)
586 (put 'comint-input-autoexpand 'permanent-local t)
587 (put 'comint-input-filter-functions 'permanent-local t)
588 (put 'comint-output-filter-functions 'permanent-local t)
589 (put 'comint-preoutput-filter-functions 'permanent-local t)
590 (put 'comint-scroll-to-bottom-on-input 'permanent-local t)
591 (put 'comint-move-point-for-output 'permanent-local t)
592 (put 'comint-scroll-show-maximum-output 'permanent-local t)
593 (put 'comint-ptyp 'permanent-local t)
595 (put 'comint-mode 'mode-class 'special)
597 (define-derived-mode comint-mode fundamental-mode "Comint"
598 "Major mode for interacting with an inferior interpreter.
599 Interpreter name is same as buffer name, sans the asterisks.
600 Return at end of buffer sends line as input.
601 Return not at end copies rest of line to end and sends it.
602 Setting variable `comint-eol-on-send' means jump to the end of the line
603 before submitting new input.
605 This mode is customized to create major modes such as Inferior Lisp
606 mode, Shell mode, etc. This can be done by setting the hooks
607 `comint-input-filter-functions', `comint-input-filter', `comint-input-sender'
608 and `comint-get-old-input' to appropriate functions, and the variable
609 `comint-prompt-regexp' to the appropriate regular expression.
611 The mode maintains an input history of size `comint-input-ring-size'.
614 Input ring history expansion can be achieved with the commands
616 Input ring expansion is controlled by the variable `comint-input-autoexpand',
617 and addition is controlled by the variable `comint-input-ignoredups'.
619 Commands with no default key bindings include `send-invisible',
620 `completion-at-point', `comint-dynamic-list-filename-completions', and
621 `comint-magic-space'.
623 Input to, and output from, the subprocess can cause the window to scroll to
624 the end of the buffer. See variables `comint-output-filter-functions',
625 `comint-preoutput-filter-functions', `comint-scroll-to-bottom-on-input',
626 and `comint-move-point-for-output'.
629 to continue it.
633 Entry to this mode runs the hooks on `comint-mode-hook'."
634 (setq mode-line-process '(":%s"))
635 (setq-local window-point-insertion-type t)
636 (setq-local comint-last-input-start (point-min-marker))
637 (setq-local comint-last-input-end (point-min-marker))
638 (setq-local comint-last-output-start (make-marker))
639 (make-local-variable 'comint-last-prompt)
640 (make-local-variable 'comint-prompt-regexp) ; Don't set; default
641 (make-local-variable 'comint-input-ring-size) ; ...to global val.
642 (make-local-variable 'comint-input-ring)
643 (make-local-variable 'comint-input-ring-file-name)
644 (or (and (boundp 'comint-input-ring) comint-input-ring)
645 (setq comint-input-ring (make-ring comint-input-ring-size)))
646 (make-local-variable 'comint-input-ring-index)
647 (make-local-variable 'comint-save-input-ring-index)
648 (or (and (boundp 'comint-input-ring-index) comint-input-ring-index)
649 (setq comint-input-ring-index nil))
650 (or (and (boundp 'comint-save-input-ring-index) comint-save-input-ring-index)
651 (setq comint-save-input-ring-index nil))
652 (make-local-variable 'comint-matching-input-from-input-string)
653 (make-local-variable 'comint-input-autoexpand)
654 (make-local-variable 'comint-input-ignoredups)
655 (make-local-variable 'comint-delimiter-argument-list)
656 (make-local-variable 'comint-completion-fignore)
657 (make-local-variable 'comint-get-old-input)
658 (make-local-variable 'comint-input-filter)
659 (make-local-variable 'comint-input-sender)
660 (make-local-variable 'comint-eol-on-send)
661 (make-local-variable 'comint-scroll-to-bottom-on-input)
662 (make-local-variable 'comint-move-point-for-output)
663 (make-local-variable 'comint-scroll-show-maximum-output)
664 (make-local-variable 'comint-stored-incomplete-input)
665 ;; Following disabled because it seems to break the case when
666 ;; comint-scroll-show-maximum-output is nil, and no-one can remember
667 ;; what the original problem was. If there are problems with point
668 ;; not going to the end, consider re-enabling this.
669 ;; http://lists.gnu.org/archive/html/emacs-devel/2007-08/msg00827.html
670 ;;
671 ;; This makes it really work to keep point at the bottom.
672 ;; (make-local-variable 'scroll-conservatively)
673 ;; (setq scroll-conservatively 10000)
674 (add-hook 'pre-command-hook 'comint-preinput-scroll-to-bottom t t)
675 (make-local-variable 'comint-ptyp)
676 (make-local-variable 'comint-process-echoes)
677 (make-local-variable 'comint-file-name-chars)
678 (make-local-variable 'comint-file-name-quote-list)
679 ;; dir tracking on remote files
680 (setq-local comint-file-name-prefix
681 (or (file-remote-p default-directory) ""))
682 (setq-local comint-accum-marker (make-marker))
683 (setq-local font-lock-defaults '(nil t))
684 (add-hook 'change-major-mode-hook 'font-lock-defontify nil t)
685 (add-hook 'isearch-mode-hook 'comint-history-isearch-setup nil t)
686 (add-hook 'completion-at-point-functions 'comint-completion-at-point nil t)
687 ;; This behavior is not useful in comint buffers, and is annoying
688 (setq-local next-line-add-newlines nil))
690 (defun comint-check-proc (buffer)
691 "Return non-nil if there is a living process associated w/buffer BUFFER.
692 Living means the status is `open', `run', or `stop'.
693 BUFFER can be either a buffer or the name of one."
694 (let ((proc (get-buffer-process buffer)))
695 (and proc (memq (process-status proc) '(open run stop)))))
697 ;;;###autoload
698 (defun make-comint-in-buffer (name buffer program &optional startfile &rest switches)
699 "Make a Comint process NAME in BUFFER, running PROGRAM.
700 If BUFFER is nil, it defaults to NAME surrounded by `*'s.
701 If there is a running process in BUFFER, it is not restarted.
703 PROGRAM should be one of the following:
704 - a string, denoting an executable program to create via
705 `start-file-process'
706 - a cons pair of the form (HOST . SERVICE), denoting a TCP
707 connection to be opened via `open-network-stream'
708 - nil, denoting a newly-allocated pty.
710 Optional fourth arg STARTFILE is the name of a file, whose
711 contents are sent to the process as its initial input.
713 If PROGRAM is a string, any more args are arguments to PROGRAM.
715 Return the (possibly newly created) process buffer."
716 (or (fboundp 'start-file-process)
717 (error "Multi-processing is not supported for this system"))
718 (setq buffer (get-buffer-create (or buffer (concat "*" name "*"))))
719 ;; If no process, or nuked process, crank up a new one and put buffer in
720 ;; comint mode. Otherwise, leave buffer and existing process alone.
721 (unless (comint-check-proc buffer)
722 (with-current-buffer buffer
723 (unless (derived-mode-p 'comint-mode)
724 (comint-mode))) ; Install local vars, mode, keymap, ...
725 (comint-exec buffer name program startfile switches))
726 buffer)
728 ;;;###autoload
729 (defun make-comint (name program &optional startfile &rest switches)
730 "Make a Comint process NAME in a buffer, running PROGRAM.
731 The name of the buffer is made by surrounding NAME with `*'s.
732 PROGRAM should be either a string denoting an executable program to create
733 via `start-file-process', or a cons pair of the form (HOST . SERVICE) denoting
734 a TCP connection to be opened via `open-network-stream'. If there is already
735 a running process in that buffer, it is not restarted. Optional third arg
736 STARTFILE is the name of a file, whose contents are sent to the
737 process as its initial input.
739 If PROGRAM is a string, any more args are arguments to PROGRAM.
741 Returns the (possibly newly created) process buffer."
742 (apply #'make-comint-in-buffer name nil program startfile switches))
744 ;;;###autoload
745 (defun comint-run (program)
746 "Run PROGRAM in a Comint buffer and switch to it.
747 The buffer name is made by surrounding the file name of PROGRAM with `*'s.
748 The file name is used to make a symbol name, such as `comint-sh-hook', and any
749 hooks on this symbol are run in the buffer.
750 See `make-comint' and `comint-exec'."
751 (interactive "sRun program: ")
752 (let ((name (file-name-nondirectory program)))
753 (switch-to-buffer (make-comint name program))
754 (run-hooks (intern-soft (concat "comint-" name "-hook")))))
755 (put 'comint-run 'interactive-only 'make-comint)
757 (defun comint-exec (buffer name command startfile switches)
758 "Start up a process named NAME in buffer BUFFER for Comint modes.
759 Runs the given COMMAND with SWITCHES, and initial input from STARTFILE.
761 COMMAND should be one of the following:
762 - a string, denoting an executable program to create via
763 `start-file-process'
764 - a cons pair of the form (HOST . SERVICE), denoting a TCP
765 connection to be opened via `open-network-stream'
766 - nil, denoting a newly-allocated pty.
768 This function blasts any old process running in the buffer, and
769 does not set the buffer mode. You can use this to cheaply run a
770 series of processes in the same Comint buffer. The hook
771 `comint-exec-hook' is run after each exec."
772 (with-current-buffer buffer
773 (let ((proc (get-buffer-process buffer))) ; Blast any old process.
774 (if proc (delete-process proc)))
775 ;; Crank up a new process
776 (let ((proc
777 (if (consp command)
778 (open-network-stream name buffer (car command) (cdr command))
779 (comint-exec-1 name buffer command switches))))
780 (set-process-filter proc 'comint-output-filter)
781 (setq-local comint-ptyp process-connection-type) ; t if pty, nil if pipe.
782 ;; Jump to the end, and set the process mark.
783 (goto-char (point-max))
784 (set-marker (process-mark proc) (point))
785 ;; Feed it the startfile.
786 (cond (startfile
787 ;;This is guaranteed to wait long enough
788 ;;but has bad results if the comint does not prompt at all
789 ;; (while (= size (buffer-size))
790 ;; (sleep-for 1))
791 ;;I hope 1 second is enough!
792 (sleep-for 1)
793 (goto-char (point-max))
794 (insert-file-contents startfile)
795 (setq startfile (buffer-substring (point) (point-max)))
796 (delete-region (point) (point-max))
797 (comint-send-string proc startfile)))
798 (run-hooks 'comint-exec-hook)
799 buffer)))
801 ;; This auxiliary function cranks up the process for comint-exec in
802 ;; the appropriate environment.
804 (defun comint-exec-1 (name buffer command switches)
805 (let ((process-environment
806 (nconc
807 ;; If using termcap, we specify `emacs' as the terminal type
808 ;; because that lets us specify a width.
809 ;; If using terminfo, we specify `dumb' because that is
810 ;; a defined terminal type. `emacs' is not a defined terminal type
811 ;; and there is no way for us to define it here.
812 ;; Some programs that use terminfo get very confused
813 ;; if TERM is not a valid terminal type.
814 ;; ;; There is similar code in compile.el.
815 (if (and (boundp 'system-uses-terminfo) system-uses-terminfo)
816 (list "TERM=dumb" "TERMCAP="
817 (format "COLUMNS=%d" (window-width)))
818 (list "TERM=emacs"
819 (format "TERMCAP=emacs:co#%d:tc=unknown:" (window-width))))
820 (unless (getenv "EMACS")
821 (list "EMACS=t"))
822 (list (format "INSIDE_EMACS=%s,comint" emacs-version))
823 process-environment))
824 (default-directory
825 (if (file-accessible-directory-p default-directory)
826 default-directory
827 "/"))
828 proc decoding encoding changed)
829 (let ((exec-path (if (and command (file-name-directory command))
830 ;; If the command has slashes, make sure we
831 ;; first look relative to the current directory.
832 (cons default-directory exec-path) exec-path)))
833 (setq proc (apply 'start-file-process name buffer command switches)))
834 ;; Some file name handler cannot start a process, fe ange-ftp.
835 (unless (processp proc) (error "No process started"))
836 (let ((coding-systems (process-coding-system proc)))
837 (setq decoding (car coding-systems)
838 encoding (cdr coding-systems)))
839 ;; Even if start-file-process left the coding system for encoding data
840 ;; sent from the process undecided, we had better use the same one
841 ;; as what we use for decoding. But, we should suppress EOL
842 ;; conversion.
843 (if (and decoding (not encoding))
844 (setq encoding (coding-system-change-eol-conversion decoding 'unix)
845 changed t))
846 (if changed
847 (set-process-coding-system proc decoding encoding))
848 proc))
850 (defun comint-insert-input (event)
851 "In a Comint buffer, set the current input to the previous input at point.
852 If there is no previous input at point, run the command specified
853 by the global keymap (usually `mouse-yank-at-click')."
854 (interactive "e")
855 ;; Don't set the mouse here, since it may otherwise change the behavior
856 ;; of the command on which we fallback if there's no field at point.
857 ;; (mouse-set-point event)
858 (let ((pos (posn-point (event-end event)))
859 field input)
860 (with-selected-window (posn-window (event-end event))
861 ;; If pos is at the very end of a field, the mouse-click was
862 ;; probably outside (to the right) of the field.
863 (and (< pos (field-end pos))
864 (< (field-end pos) (point-max))
865 (progn (setq field (field-at-pos pos))
866 (setq input (field-string-no-properties pos)))))
867 (if (or (null input) (null comint-accum-marker) field)
868 ;; Fall back to the global definition if (i) the selected
869 ;; buffer is not a comint buffer (which can happen if a
870 ;; non-comint window was selected and we clicked in a comint
871 ;; window), or (ii) there is no input at POS.
872 (let* ((keys (this-command-keys))
873 (last-key (and (vectorp keys) (aref keys (1- (length keys)))))
874 (fun (and last-key (lookup-key global-map (vector last-key)))))
875 (and fun (not (eq fun 'comint-insert-input))
876 (call-interactively fun)))
877 (with-selected-window (posn-window (event-end event))
878 ;; Otherwise, insert the previous input.
879 (goto-char (point-max))
880 ;; First delete any old unsent input at the end
881 (delete-region
882 (or (marker-position comint-accum-marker)
883 (process-mark (get-buffer-process (current-buffer))))
884 (point))
885 ;; Insert the input at point
886 (insert input)))))
887 \f
888 ;; Input history processing in a buffer
889 ;; ===========================================================================
890 ;; Useful input history functions, courtesy of the Ergo group.
892 ;; Eleven commands:
893 ;; comint-dynamic-list-input-ring List history in help buffer.
894 ;; comint-previous-input Previous input...
895 ;; comint-previous-matching-input ...matching a string.
896 ;; comint-previous-matching-input-from-input ... matching the current input.
897 ;; comint-next-input Next input...
898 ;; comint-next-matching-input ...matching a string.
899 ;; comint-next-matching-input-from-input ... matching the current input.
900 ;; comint-backward-matching-input Backwards input...
901 ;; comint-forward-matching-input ...matching a string.
902 ;; comint-replace-by-expanded-history Expand history at point;
903 ;; replace with expanded history.
904 ;; comint-magic-space Expand history and insert space.
905 ;;
906 ;; Three functions:
907 ;; comint-read-input-ring Read into comint-input-ring...
908 ;; comint-write-input-ring Write to comint-input-ring-file-name.
909 ;; comint-replace-by-expanded-history-before-point Workhorse function.
911 (defun comint-read-input-ring (&optional silent)
912 "Set the buffer's `comint-input-ring' from a history file.
913 The name of the file is given by the variable `comint-input-ring-file-name'.
914 The history ring is of size `comint-input-ring-size', regardless of file size.
915 If `comint-input-ring-file-name' is nil this function does nothing.
917 If the optional argument SILENT is non-nil, we say nothing about a
918 failure to read the history file.
920 This function is useful for major mode commands and mode hooks.
922 The commands stored in the history file are separated by the
923 `comint-input-ring-separator', and entries that match
924 `comint-input-history-ignore' are ignored. The most recent command
925 comes last.
927 See also `comint-input-ignoredups' and `comint-write-input-ring'."
928 (cond ((or (null comint-input-ring-file-name)
929 (equal comint-input-ring-file-name ""))
930 nil)
931 ((not (file-readable-p comint-input-ring-file-name))
932 (or silent
933 (message "Cannot read history file %s"
934 comint-input-ring-file-name)))
935 (t
936 (let* ((file comint-input-ring-file-name)
937 (count 0)
938 ;; Some users set HISTSIZE or `comint-input-ring-size'
939 ;; to huge numbers. Don't allocate a huge ring right
940 ;; away; there might not be that much history.
941 (ring-size (min 1500 comint-input-ring-size))
942 (ring (make-ring ring-size)))
943 (with-temp-buffer
944 (insert-file-contents file)
945 ;; Save restriction in case file is already visited...
946 ;; Watch for those date stamps in history files!
947 (goto-char (point-max))
948 (let (start end history)
949 (while (and (< count comint-input-ring-size)
950 (re-search-backward comint-input-ring-separator
951 nil t)
952 (setq end (match-beginning 0)))
953 (setq start
954 (if (re-search-backward comint-input-ring-separator
955 nil t)
956 (match-end 0)
957 (point-min)))
958 (setq history (buffer-substring start end))
959 (goto-char start)
960 (when (and (not (string-match comint-input-history-ignore
961 history))
962 (or (null comint-input-ignoredups)
963 (ring-empty-p ring)
964 (not (string-equal (ring-ref ring 0)
965 history))))
966 (when (= count ring-size)
967 (ring-extend ring (min (- comint-input-ring-size ring-size)
968 ring-size))
969 (setq ring-size (ring-size ring)))
970 (ring-insert-at-beginning ring history)
971 (setq count (1+ count))))))
972 (setq comint-input-ring ring
973 comint-input-ring-index nil)))))
975 (defun comint-write-input-ring ()
976 "Writes the buffer's `comint-input-ring' to a history file.
977 The name of the file is given by the variable `comint-input-ring-file-name'.
978 The original contents of the file are lost if `comint-input-ring' is not empty.
979 If `comint-input-ring-file-name' is nil this function does nothing.
981 Useful within process sentinels.
983 See also `comint-read-input-ring'."
984 (cond ((or (null comint-input-ring-file-name)
985 (equal comint-input-ring-file-name "")
986 (null comint-input-ring) (ring-empty-p comint-input-ring))
987 nil)
988 ((not (file-writable-p comint-input-ring-file-name))
989 (message "Cannot write history file %s" comint-input-ring-file-name))
990 (t
991 (let* ((history-buf (get-buffer-create " *Temp Input History*"))
992 (ring comint-input-ring)
993 (file comint-input-ring-file-name)
994 (index (ring-length ring)))
995 ;; Write it all out into a buffer first. Much faster, but messier,
996 ;; than writing it one line at a time.
997 (with-current-buffer history-buf
998 (erase-buffer)
999 (while (> index 0)
1000 (setq index (1- index))
1001 (insert (ring-ref ring index) comint-input-ring-separator))
1002 (write-region (buffer-string) nil file nil 'no-message)
1003 (kill-buffer nil))))))
1006 (defvar comint-dynamic-list-input-ring-window-conf)
1008 (defun comint-dynamic-list-input-ring-select ()
1009 "Choose the input history entry that point is in or next to."
1010 (interactive)
1011 (let ((buffer completion-reference-buffer)
1012 beg end completion)
1013 (if (and (not (eobp)) (get-text-property (point) 'mouse-face))
1014 (setq end (point) beg (1+ (point))))
1015 (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
1016 (setq end (1- (point)) beg (point)))
1017 (if (null beg)
1018 (error "No history entry here"))
1019 (setq beg (previous-single-property-change beg 'mouse-face))
1020 (setq end (or (next-single-property-change end 'mouse-face) (point-max)))
1021 (setq completion (buffer-substring beg end))
1022 (set-window-configuration comint-dynamic-list-input-ring-window-conf)
1023 (choose-completion-string completion buffer)))
1025 (defun comint-dynamic-list-input-ring ()
1026 "Display a list of recent inputs entered into the current buffer."
1027 (interactive)
1028 (if (or (not (ring-p comint-input-ring))
1029 (ring-empty-p comint-input-ring))
1030 (message "No history")
1031 (let ((history nil)
1032 (history-buffer " *Input History*")
1033 (conf (current-window-configuration)))
1034 ;; We have to build up a list ourselves from the ring vector.
1035 (dotimes (index (ring-length comint-input-ring))
1036 (push (ring-ref comint-input-ring index) history))
1037 ;; Show them most-recent-first.
1038 (setq history (nreverse history))
1039 ;; Change "completion" to "history reference"
1040 ;; to make the display accurate.
1041 (with-output-to-temp-buffer history-buffer
1042 (display-completion-list history)
1043 (set-buffer history-buffer)
1044 (let ((keymap (make-sparse-keymap)))
1045 (set-keymap-parent keymap (current-local-map))
1046 (define-key keymap "\C-m" 'comint-dynamic-list-input-ring-select)
1047 (use-local-map keymap))
1048 (forward-line 3)
1049 (while (search-backward "completion" nil 'move)
1050 (replace-match "history reference")))
1051 (sit-for 0)
1052 (message "Hit space to flush")
1053 (setq comint-dynamic-list-input-ring-window-conf conf)
1054 (let ((ch (read-event)))
1055 (if (eq ch ?\s)
1056 (set-window-configuration conf)
1057 (setq unread-command-events (list ch)))))))
1060 (defun comint-regexp-arg (prompt)
1061 "Return list of regexp and prefix arg using PROMPT."
1062 (let* (;; Don't clobber this.
1063 (last-command last-command)
1064 (regexp (read-from-minibuffer prompt nil nil nil
1065 'minibuffer-history-search-history)))
1066 ;; If the user didn't enter anything, nothing is added to m-h-s-h.
1067 ;; Use the previous search regexp, if there is one.
1068 (list (if (string-equal regexp "")
1069 (or (car minibuffer-history-search-history)
1070 regexp)
1071 regexp)
1072 (prefix-numeric-value current-prefix-arg))))
1074 (defun comint-search-arg (arg)
1075 ;; First make sure there is a ring and that we are after the process mark
1076 (cond ((not (comint-after-pmark-p))
1077 (user-error "Not at command line"))
1078 ((or (null comint-input-ring)
1079 (ring-empty-p comint-input-ring))
1080 (user-error "Empty input ring"))
1081 ((zerop arg)
1082 ;; arg of zero resets search from beginning, and uses arg of 1
1083 (setq comint-input-ring-index nil)
1084 1)
1085 (t
1086 arg)))
1088 (defun comint-restore-input ()
1089 "Restore unfinished input."
1090 (interactive)
1091 (when comint-input-ring-index
1092 (comint-delete-input)
1093 (when (> (length comint-stored-incomplete-input) 0)
1094 (insert comint-stored-incomplete-input)
1095 (message "Input restored"))
1096 (setq comint-input-ring-index nil)))
1098 (defun comint-search-start (arg)
1099 "Index to start a directional search, starting at `comint-input-ring-index'."
1100 (if comint-input-ring-index
1101 ;; If a search is running, offset by 1 in direction of arg
1102 (mod (+ comint-input-ring-index (if (> arg 0) 1 -1))
1103 (ring-length comint-input-ring))
1104 ;; For a new search, start from beginning or end, as appropriate
1105 (if (>= arg 0)
1106 0 ; First elt for forward search
1107 (1- (ring-length comint-input-ring))))) ; Last elt for backward search
1109 (defun comint-previous-input-string (arg)
1110 "Return the string ARG places along the input ring.
1111 Moves relative to `comint-input-ring-index'."
1112 (ring-ref comint-input-ring (if comint-input-ring-index
1113 (mod (+ arg comint-input-ring-index)
1114 (ring-length comint-input-ring))
1115 arg)))
1117 (defun comint-previous-input (arg)
1118 "Cycle backwards through input history, saving input."
1119 (interactive "*p")
1120 (if (and comint-input-ring-index
1121 (or ;; leaving the "end" of the ring
1122 (and (< arg 0) ; going down
1123 (eq comint-input-ring-index 0))
1124 (and (> arg 0) ; going up
1125 (eq comint-input-ring-index
1126 (1- (ring-length comint-input-ring)))))
1127 comint-stored-incomplete-input)
1128 (comint-restore-input)
1129 (comint-previous-matching-input "." arg)))
1131 (defun comint-next-input (arg)
1132 "Cycle forwards through input history."
1133 (interactive "*p")
1134 (comint-previous-input (- arg)))
1136 (defun comint-previous-matching-input-string (regexp arg)
1137 "Return the string matching REGEXP ARG places along the input ring.
1138 Moves relative to `comint-input-ring-index'."
1139 (let* ((pos (comint-previous-matching-input-string-position regexp arg)))
1140 (if pos (ring-ref comint-input-ring pos))))
1142 (defun comint-previous-matching-input-string-position (regexp arg &optional start)
1143 "Return the index matching REGEXP ARG places along the input ring.
1144 Moves relative to START, or `comint-input-ring-index'."
1145 (if (or (not (ring-p comint-input-ring))
1146 (ring-empty-p comint-input-ring))
1147 (user-error "No history"))
1148 (let* ((len (ring-length comint-input-ring))
1149 (motion (if (> arg 0) 1 -1))
1150 (n (mod (- (or start (comint-search-start arg)) motion) len))
1151 (tried-each-ring-item nil)
1152 (prev nil))
1153 ;; Do the whole search as many times as the argument says.
1154 (while (and (/= arg 0) (not tried-each-ring-item))
1155 ;; Step once.
1156 (setq prev n
1157 n (mod (+ n motion) len))
1158 ;; If we haven't reached a match, step some more.
1159 (while (and (< n len) (not tried-each-ring-item)
1160 (not (string-match regexp (ring-ref comint-input-ring n))))
1161 (setq n (mod (+ n motion) len)
1162 ;; If we have gone all the way around in this search.
1163 tried-each-ring-item (= n prev)))
1164 (setq arg (if (> arg 0) (1- arg) (1+ arg))))
1165 ;; Now that we know which ring element to use, if we found it, return that.
1166 (if (string-match regexp (ring-ref comint-input-ring n))
1167 n)))
1169 (defun comint-delete-input ()
1170 "Delete all input between accumulation or process mark and point."
1171 (delete-region
1172 ;; Can't use kill-region as it sets this-command
1173 (or (marker-position comint-accum-marker)
1174 (process-mark (get-buffer-process (current-buffer))))
1175 (point-max)))
1177 (defun comint-previous-matching-input (regexp n)
1178 "Search backwards through input history for match for REGEXP.
1179 \(Previous history elements are earlier commands.)
1180 With prefix argument N, search for Nth previous match.
1181 If N is negative, find the next or Nth next match."
1182 (interactive (comint-regexp-arg "Previous input matching (regexp): "))
1183 (setq n (comint-search-arg n))
1184 (let ((pos (comint-previous-matching-input-string-position regexp n)))
1185 ;; Has a match been found?
1186 (if (null pos)
1187 (user-error "Not found")
1188 ;; If leaving the edit line, save partial input
1189 (if (null comint-input-ring-index) ;not yet on ring
1190 (setq comint-stored-incomplete-input
1191 (funcall comint-get-old-input)))
1192 (setq comint-input-ring-index pos)
1193 (unless isearch-mode
1194 (let ((message-log-max nil)) ; Do not write to *Messages*.
1195 (message "History item: %d" (1+ pos))))
1196 (comint-delete-input)
1197 (insert (ring-ref comint-input-ring pos)))))
1199 (defun comint-next-matching-input (regexp n)
1200 "Search forwards through input history for match for REGEXP.
1201 \(Later history elements are more recent commands.)
1202 With prefix argument N, search for Nth following match.
1203 If N is negative, find the previous or Nth previous match."
1204 (interactive (comint-regexp-arg "Next input matching (regexp): "))
1205 (comint-previous-matching-input regexp (- n)))
1207 (defun comint-previous-matching-input-from-input (n)
1208 "Search backwards through input history for match for current input.
1209 \(Previous history elements are earlier commands.)
1210 With prefix argument N, search for Nth previous match.
1211 If N is negative, search forwards for the -Nth following match."
1212 (interactive "p")
1213 (let ((opoint (point)))
1214 (unless (memq last-command '(comint-previous-matching-input-from-input
1215 comint-next-matching-input-from-input))
1216 ;; Starting a new search
1217 (setq comint-matching-input-from-input-string
1218 (buffer-substring
1219 (or (marker-position comint-accum-marker)
1220 (process-mark (get-buffer-process (current-buffer))))
1221 (point))
1222 comint-input-ring-index nil))
1223 (comint-previous-matching-input
1224 (concat "^" (regexp-quote comint-matching-input-from-input-string))
1225 n)
1226 (goto-char opoint)))
1228 (defun comint-next-matching-input-from-input (n)
1229 "Search forwards through input history for match for current input.
1230 \(Following history elements are more recent commands.)
1231 With prefix argument N, search for Nth following match.
1232 If N is negative, search backwards for the -Nth previous match."
1233 (interactive "p")
1234 (comint-previous-matching-input-from-input (- n)))
1237 (defun comint-replace-by-expanded-history (&optional silent start)
1238 "Expand input command history references before point.
1239 Expansion is dependent on the value of `comint-input-autoexpand'.
1241 This function depends on the buffer's idea of the input history, which may not
1242 match the command interpreter's idea, assuming it has one.
1244 Assumes history syntax is like typical Un*x shells'. However, since Emacs
1245 cannot know the interpreter's idea of input line numbers, assuming it has one,
1246 it cannot expand absolute input line number references.
1248 If the optional argument SILENT is non-nil, never complain
1249 even if history reference seems erroneous.
1251 If the optional argument START is non-nil, that specifies the
1252 start of the text to scan for history references, rather
1253 than the logical beginning of line.
1255 See `comint-magic-space' and `comint-replace-by-expanded-history-before-point'.
1257 Returns t if successful."
1258 (interactive)
1259 (let ((f (comint-c-a-p-replace-by-expanded-history silent start)))
1260 (if f (funcall f))))
1262 (defun comint-c-a-p-replace-by-expanded-history (&optional silent start)
1263 "Expand input command history at point.
1264 For use on `completion-at-point-functions'."
1265 (if (and comint-input-autoexpand
1266 (if comint-use-prompt-regexp
1267 ;; Use comint-prompt-regexp
1268 (save-excursion
1269 (beginning-of-line)
1271 ;; Use input fields. User input that hasn't been entered
1272 ;; yet, at the end of the buffer, has a nil `field' property.
1273 (and (null (get-char-property (point) 'field))
1275 (catch 'dry-run
1276 (comint-replace-by-expanded-history-before-point
1277 silent start 'dry-run)))
1278 (lambda ()
1279 ;; Looks like there might be history references in the command.
1280 (let ((previous-modified-tick (buffer-modified-tick)))
1281 (comint-replace-by-expanded-history-before-point silent start)
1282 (/= previous-modified-tick (buffer-modified-tick))))))
1285 (defun comint-replace-by-expanded-history-before-point
1286 (silent &optional start dry-run)
1287 "Expand directory stack reference before point.
1288 See `comint-replace-by-expanded-history'. Returns t if successful.
1290 If the optional argument START is non-nil, that specifies the
1291 start of the text to scan for history references, rather
1292 than the logical beginning of line.
1294 If DRY-RUN is non-nil, throw to DRY-RUN before performing any
1295 actual side-effect."
1296 (save-excursion
1297 (let ((toend (- (line-end-position) (point)))
1298 (start (or start (comint-line-beginning-position))))
1299 (goto-char start)
1300 (while (progn
1301 (skip-chars-forward "^!^" (- (line-end-position) toend))
1302 (< (point) (- (line-end-position) toend)))
1303 ;; This seems a bit complex. We look for references such as !!, !-num,
1304 ;; !foo, !?foo, !{bar}, !?{bar}, ^oh, ^my^, ^god^it, ^never^ends^.
1305 ;; If that wasn't enough, the plings can be suffixed with argument
1306 ;; range specifiers.
1307 ;; Argument ranges are complex too, so we hive off the input line,
1308 ;; referenced with plings, with the range string to `comint-args'.
1309 (setq comint-input-ring-index nil)
1311 (comint-within-quotes start (point)))
1312 ;; The history is quoted, or we're in quotes.
1313 (goto-char (1+ (point))))
1315 ;; We cannot know the interpreter's idea of input line numbers.
1316 (if dry-run (throw dry-run 'message))
1317 (goto-char (match-end 0))
1318 (message "Absolute reference cannot be expanded"))
1320 ;; Just a number of args from `number' lines backward.
1321 (if dry-run (throw dry-run 'history))
1322 (let ((number (1- (string-to-number
1323 (buffer-substring (match-beginning 1)
1324 (match-end 1))))))
1325 (if (<= number (ring-length comint-input-ring))
1326 (progn
1327 (replace-match
1328 (comint-args (comint-previous-input-string number)
1329 (match-beginning 2) (match-end 2))
1330 t t)
1331 (setq comint-input-ring-index number)
1332 (message "History item: %d" (1+ number)))
1333 (goto-char (match-end 0))
1334 (message "Relative reference exceeds input history size"))))
1336 ;; Just a number of args from the previous input line.
1337 (if dry-run (throw dry-run 'expand))
1338 (replace-match (comint-args (comint-previous-input-string 0)
1339 (match-beginning 1) (match-end 1))
1340 t t)
1341 (message "History item: previous"))
1342 ((looking-at
1344 ;; Most recent input starting with or containing (possibly
1345 ;; protected) string, maybe just a number of args. Phew.
1346 (if dry-run (throw dry-run 'expand))
1347 (let* ((mb1 (match-beginning 1)) (me1 (match-end 1))
1348 (mb2 (match-beginning 2)) (me2 (match-end 2))
1349 (exp (buffer-substring (or mb2 mb1) (or me2 me1)))
1351 (pos (save-match-data
1352 (comint-previous-matching-input-string-position
1353 (concat pref (regexp-quote exp)) 1))))
1354 (if (null pos)
1355 (progn
1356 (goto-char (match-end 0))
1357 (or silent
1358 (progn (message "Not found")
1359 (ding))))
1360 (setq comint-input-ring-index pos)
1361 (replace-match
1362 (comint-args (ring-ref comint-input-ring pos)
1363 (match-beginning 4) (match-end 4))
1364 t t)
1365 (message "History item: %d" (1+ pos)))))
1367 ;; Quick substitution on the previous input line.
1368 (if dry-run (throw dry-run 'expand))
1369 (let ((old (buffer-substring (match-beginning 1) (match-end 1)))
1370 (new (buffer-substring (match-beginning 2) (match-end 2)))
1371 (pos nil))
1372 (replace-match (comint-previous-input-string 0) t t)
1373 (setq pos (point))
1374 (goto-char (match-beginning 0))
1375 (if (not (search-forward old pos t))
1376 (or silent
1377 (user-error "Not found"))
1378 (replace-match new t t)
1379 (message "History item: substituted"))))
1380 (t
1381 (forward-char 1)))))
1382 nil))
1385 (defun comint-magic-space (arg)
1386 "Expand input history references before point and insert ARG spaces.
1387 A useful command to bind to SPC. See `comint-replace-by-expanded-history'."
1388 (interactive "p")
1389 (comint-replace-by-expanded-history)
1390 (self-insert-command arg))
1391 \f
1392 ;; Isearch in comint input history
1394 (defcustom comint-history-isearch nil
1395 "Non-nil to Isearch in input history only, not in comint buffer output.
1396 If t, usual Isearch keys like `C-r' and `C-M-r' in comint mode search
1397 in the input history.
1398 If `dwim', Isearch keys search in the input history only when initial
1399 point position is at the comint command line. When starting Isearch
1400 from other parts of the comint buffer, they search in the comint buffer.
1401 If nil, Isearch operates on the whole comint buffer."
1402 :type '(choice (const :tag "Don't search in input history" nil)
1403 (const :tag "When point is on command line initially, search history" dwim)
1404 (const :tag "Always search in input history" t))
1405 :group 'comint
1406 :version "23.2")
1408 (defun comint-history-isearch-backward ()
1409 "Search for a string backward in input history using Isearch."
1410 (interactive)
1411 (let ((comint-history-isearch t))
1412 (isearch-backward nil t)))
1414 (defun comint-history-isearch-backward-regexp ()
1415 "Search for a regular expression backward in input history using Isearch."
1416 (interactive)
1417 (let ((comint-history-isearch t))
1418 (isearch-backward-regexp nil t)))
1420 (defvar-local comint-history-isearch-message-overlay nil)
1422 (defun comint-history-isearch-setup ()
1423 "Set up a comint for using Isearch to search the input history.
1424 Intended to be added to `isearch-mode-hook' in `comint-mode'."
1425 (when (or (eq comint-history-isearch t)
1426 (and (eq comint-history-isearch 'dwim)
1427 ;; Point is at command line.
1428 (comint-after-pmark-p)))
1429 (setq isearch-message-prefix-add "history ")
1430 (setq-local isearch-search-fun-function
1431 #'comint-history-isearch-search)
1432 (setq-local isearch-message-function
1433 #'comint-history-isearch-message)
1434 (setq-local isearch-wrap-function
1435 #'comint-history-isearch-wrap)
1436 (setq-local isearch-push-state-function
1437 #'comint-history-isearch-push-state)
1438 (add-hook 'isearch-mode-end-hook 'comint-history-isearch-end nil t)))
1440 (defun comint-history-isearch-end ()
1441 "Clean up the comint after terminating Isearch in comint."
1442 (if comint-history-isearch-message-overlay
1443 (delete-overlay comint-history-isearch-message-overlay))
1444 (setq isearch-message-prefix-add nil)
1445 (setq isearch-search-fun-function 'isearch-search-fun-default)
1446 (setq isearch-message-function nil)
1447 (setq isearch-wrap-function nil)
1448 (setq isearch-push-state-function nil)
1449 (remove-hook 'isearch-mode-end-hook 'comint-history-isearch-end t))
1451 (defun comint-goto-input (pos)
1452 "Put input history item of the absolute history position POS."
1453 ;; If leaving the edit line, save partial unfinished input.
1454 (if (null comint-input-ring-index)
1455 (setq comint-stored-incomplete-input
1456 (funcall comint-get-old-input)))
1457 (setq comint-input-ring-index pos)
1458 (comint-delete-input)
1459 (if (and pos (not (ring-empty-p comint-input-ring)))
1460 (insert (ring-ref comint-input-ring pos))
1461 ;; Restore partial unfinished input.
1462 (when (> (length comint-stored-incomplete-input) 0)
1463 (insert comint-stored-incomplete-input))))
1465 (defun comint-history-isearch-search ()
1466 "Return the proper search function, for Isearch in input history."
1467 (lambda (string bound noerror)
1468 (let ((search-fun
1469 ;; Use standard functions to search within comint text
1470 (isearch-search-fun-default))
1471 found)
1472 ;; Avoid lazy-highlighting matches in the comint prompt and in the
1473 ;; output when searching forward. Lazy-highlight calls this lambda
1474 ;; with the bound arg, so skip the prompt and the output.
1475 (if (and bound isearch-forward (not (comint-after-pmark-p)))
1476 (goto-char (process-mark (get-buffer-process (current-buffer)))))
1477 (or
1478 ;; 1. First try searching in the initial comint text
1479 (funcall search-fun string
1480 (if isearch-forward bound (comint-line-beginning-position))
1481 noerror)
1482 ;; 2. If the above search fails, start putting next/prev history
1483 ;; elements in the comint successively, and search the string
1484 ;; in them. Do this only when bound is nil (i.e. not while
1485 ;; lazy-highlighting search strings in the current comint text).
1486 (unless bound
1487 (condition-case nil
1488 (progn
1489 (while (not found)
1490 (cond (isearch-forward
1491 ;; Signal an error here explicitly, because
1492 ;; `comint-next-input' doesn't signal an error.
1493 (when (null comint-input-ring-index)
1494 (error "End of history; no next item"))
1495 (comint-next-input 1)
1496 (goto-char (comint-line-beginning-position)))
1497 (t
1498 ;; Signal an error here explicitly, because
1499 ;; `comint-previous-input' doesn't signal an error.
1500 (when (eq comint-input-ring-index
1501 (1- (ring-length comint-input-ring)))
1502 (error "Beginning of history; no preceding item"))
1503 (comint-previous-input 1)
1504 (goto-char (point-max))))
1505 (setq isearch-barrier (point) isearch-opoint (point))
1506 ;; After putting the next/prev history element, search
1507 ;; the string in them again, until comint-next-input
1508 ;; or comint-previous-input raises an error at the
1509 ;; beginning/end of history.
1510 (setq found (funcall search-fun string
1511 (unless isearch-forward
1512 ;; For backward search, don't search
1513 ;; in the comint prompt
1514 (comint-line-beginning-position))
1515 noerror)))
1516 ;; Return point of the new search result
1517 (point))
1518 ;; Return nil on the error "no next/preceding item"
1519 (error nil)))))))
1521 (defun comint-history-isearch-message (&optional c-q-hack ellipsis)
1522 "Display the input history search prompt.
1523 If there are no search errors, this function displays an overlay with
1524 the Isearch prompt which replaces the original comint prompt.
1525 Otherwise, it displays the standard Isearch message returned from
1526 the function `isearch-message'."
1527 (if (not (and isearch-success (not isearch-error)))
1528 ;; Use standard function `isearch-message' when not in comint prompt,
1529 ;; or search fails, or has an error (like incomplete regexp).
1530 ;; This function displays isearch message in the echo area,
1531 ;; so it's possible to see what is wrong in the search string.
1532 (isearch-message c-q-hack ellipsis)
1533 ;; Otherwise, put the overlay with the standard isearch prompt over
1534 ;; the initial comint prompt.
1535 (if (overlayp comint-history-isearch-message-overlay)
1536 (move-overlay comint-history-isearch-message-overlay
1537 (save-excursion (forward-line 0) (point))
1538 (comint-line-beginning-position))
1539 (setq comint-history-isearch-message-overlay
1540 (make-overlay (save-excursion (forward-line 0) (point))
1541 (comint-line-beginning-position)))
1542 (overlay-put comint-history-isearch-message-overlay 'evaporate t))
1543 (overlay-put comint-history-isearch-message-overlay
1544 'display (isearch-message-prefix c-q-hack ellipsis))
1545 (if (and comint-input-ring-index (not ellipsis))
1546 ;; Display the current history index.
1547 (message "History item: %d" (1+ comint-input-ring-index))
1548 ;; Or clear a previous isearch message.
1549 (message ""))))
1551 (defun comint-history-isearch-wrap ()
1552 "Wrap the input history search when search fails.
1553 Move point to the first history element for a forward search,
1554 or to the last history element for a backward search."
1555 ;; When `comint-history-isearch-search' fails on reaching the
1556 ;; beginning/end of the history, wrap the search to the first/last
1557 ;; input history element.
1558 (if isearch-forward
1559 (comint-goto-input (1- (ring-length comint-input-ring)))
1560 (comint-goto-input nil))
1561 (setq isearch-success t)
1562 (goto-char (if isearch-forward (comint-line-beginning-position) (point-max))))
1564 (defun comint-history-isearch-push-state ()
1565 "Save a function restoring the state of input history search.
1566 Save `comint-input-ring-index' to the additional state parameter
1567 in the search status stack."
1568 (let ((index comint-input-ring-index))
1569 (lambda (cmd)
1570 (comint-history-isearch-pop-state cmd index))))
1572 (defun comint-history-isearch-pop-state (_cmd hist-pos)
1573 "Restore the input history search state.
1574 Go to the history element by the absolute history position HIST-POS."
1575 (comint-goto-input hist-pos))
1577 \f
1578 (defun comint-within-quotes (beg end)
1579 "Return t if the number of quotes between BEG and END is odd.
1580 Quotes are single and double."
1583 (or (= (mod countsq 2) 1) (= (mod countdq 2) 1))))
1585 (defun comint-how-many-region (regexp beg end)
1586 "Return number of matches for REGEXP from BEG to END."
1587 (let ((count 0))
1588 (save-excursion
1589 (save-match-data
1590 (goto-char beg)
1591 (while (re-search-forward regexp end t)
1592 (setq count (1+ count)))))
1593 count))
1595 (defun comint-args (string begin end)
1596 ;; From STRING, return the args depending on the range specified in the text
1597 ;; from BEGIN to END. If BEGIN is nil, assume all args. Ignore leading `:'.
1598 ;; Range can be x-y, x-, -y, where x/y can be [0-9], *, ^, $.
1599 (save-match-data
1600 (if (null begin)
1601 (comint-arguments string 0 nil)
1602 (let* ((range (buffer-substring
1603 (if (eq (char-after begin) ?:) (1+ begin) begin) end))
1604 (nth (cond ((string-match "^[*^]" range) 1)
1605 ((string-match "^-" range) 0)
1606 ((string-equal range "$") nil)
1607 (t (string-to-number range))))
1608 (mth (cond ((string-match "[-*$]$" range) nil)
1609 ((string-match "-" range)
1610 (string-to-number (substring range (match-end 0))))
1611 (t nth))))
1612 (comint-arguments string nth mth)))))
1614 (defun comint-delim-arg (arg)
1615 "Return a list of arguments from ARG.
1616 Break it up at the delimiters in `comint-delimiter-argument-list'.
1617 Returned list is backwards.
1619 Characters with non-nil values of the text property `literal' are
1620 assumed to have literal values (e.g., backslash-escaped
1621 characters), and are not considered to be delimiters."
1622 (if (null comint-delimiter-argument-list)
1623 (list arg)
1624 (let ((args nil)
1625 (pos 0)
1626 (len (length arg)))
1627 (while (< pos len)
1628 (let ((char (aref arg pos))
1629 (start pos))
1630 (if (and (memq char comint-delimiter-argument-list)
1631 ;; Ignore backslash-escaped characters.
1632 (not (get-text-property pos 'literal arg)))
1633 (while (and (< pos len) (eq (aref arg pos) char))
1634 (setq pos (1+ pos)))
1635 (while (and (< pos len)
1636 (not (and (memq (aref arg pos)
1637 comint-delimiter-argument-list)
1638 (not (get-text-property
1639 pos 'literal arg)))))
1640 (setq pos (1+ pos))))
1641 (setq args (cons (substring arg start pos) args))))
1642 args)))
1644 (defun comint-arguments (string nth mth)
1645 "Return from STRING the NTH to MTH arguments.
1646 NTH and/or MTH can be nil, which means the last argument.
1647 Returned arguments are separated by single spaces.
1648 We assume whitespace separates arguments, except within quotes
1649 and except for a space or tab that immediately follows a backslash.
1650 Also, a run of one or more of a single character
1651 in `comint-delimiter-argument-list' is a separate argument.
1652 Argument 0 is the command name."
1653 ;; The first line handles ordinary characters and backslash-sequences
1654 ;; (except with w32 msdos-like shells, where backslashes are valid).
1655 ;; The second matches "-quoted strings.
1656 ;; The third matches '-quoted strings.
1657 ;; The fourth matches `-quoted strings.
1658 ;; This seems to fit the syntax of BASH 2.0.
1659 (let* ((backslash-escape (not (and (fboundp 'w32-shell-dos-semantics)
1660 (w32-shell-dos-semantics))))
1661 (first (if backslash-escape
1664 (argpart (concat first
1668 (quote-subexpr (if backslash-escape 2 1))
1669 (args ()) (pos 0)
1670 (count 0)
1671 beg str quotes)
1672 ;; Build a list of all the args until we have as many as we want.
1673 (while (and (or (null mth) (<= count mth))
1674 (string-match argpart string pos))
1675 ;; Apply the `literal' text property to backslash-escaped
1676 ;; characters, so that `comint-delim-arg' won't break them up.
1677 (and backslash-escape
1678 (match-beginning 1)
1679 (put-text-property (match-beginning 1) (match-end 1)
1680 'literal t string))
1681 (if (and beg (= pos (match-beginning 0)))
1682 ;; It's contiguous, part of the same arg.
1683 (setq pos (match-end 0)
1684 quotes (or quotes (match-beginning quote-subexpr)))
1685 ;; It's a new separate arg.
1686 (if beg
1687 ;; Put the previous arg, if there was one, onto ARGS.
1688 (setq str (substring string beg pos)
1689 args (if quotes (cons str args)
1690 (nconc (comint-delim-arg str) args))))
1691 (setq count (length args))
1692 (setq quotes (match-beginning quote-subexpr))
1693 (setq beg (match-beginning 0))
1694 (setq pos (match-end 0))))
1695 (if beg
1696 (setq str (substring string beg pos)
1697 args (if quotes (cons str args)
1698 (nconc (comint-delim-arg str) args))))
1699 (setq count (length args))
1700 (let ((n (or nth (1- count)))
1701 (m (if mth (1- (- count mth)) 0)))
1702 (mapconcat
1703 (function (lambda (a) a)) (nthcdr n (nreverse (nthcdr m args))) " "))))
1704 \f
1705 ;;
1706 ;; Input processing stuff
1707 ;;
1708 (defun comint-add-to-input-history (cmd)
1709 "Add CMD to the input history.
1710 Ignore duplicates if `comint-input-ignoredups' is non-nil."
1711 (when (and (funcall comint-input-filter cmd)
1712 (or (null comint-input-ignoredups)
1713 (not (ring-p comint-input-ring))
1714 (ring-empty-p comint-input-ring)
1715 (not (string-equal (ring-ref comint-input-ring 0) cmd))))
1716 ;; If `comint-input-ring' is full, maybe grow it.
1717 (let ((size (ring-size comint-input-ring)))
1718 (and (= size (ring-length comint-input-ring))
1719 (< size comint-input-ring-size)
1720 (ring-extend comint-input-ring
1721 (min size (- comint-input-ring-size size)))))
1722 (ring-insert comint-input-ring cmd)))
1724 (defun comint-send-input (&optional no-newline artificial)
1725 "Send input to process.
1726 After the process output mark, sends all text from the process mark to
1727 point as input to the process. Before the process output mark, calls
1728 value of variable `comint-get-old-input' to retrieve old input, copies
1729 it to the process mark, and sends it.
1731 This command also sends and inserts a final newline, unless
1732 NO-NEWLINE is non-nil.
1734 Any history reference may be expanded depending on the value of the variable
1735 `comint-input-autoexpand'. The list of function names contained in the value
1736 of `comint-input-filter-functions' is called on the input before sending it.
1737 The input is entered into the input history ring, if the value of variable
1738 `comint-input-filter' returns non-nil when called on the input.
1740 If variable `comint-eol-on-send' is non-nil, then point is moved to the
1741 end of line before sending the input.
1743 After the input has been sent, if `comint-process-echoes' is non-nil,
1744 then `comint-send-input' waits to see if the process outputs a string
1745 matching the input, and if so, deletes that part of the output.
1746 If ARTIFICIAL is non-nil, it inhibits such deletion.
1747 Callers sending input not from the user should use ARTIFICIAL = t.
1749 The values of `comint-get-old-input', `comint-input-filter-functions', and
1750 `comint-input-filter' are chosen according to the command interpreter running
1751 in the buffer. E.g.,
1753 If the interpreter is the csh,
1754 `comint-get-old-input' is the default:
1755 If `comint-use-prompt-regexp' is nil, then
1756 either return the current input field, if point is on an input
1757 field, or the current line, if point is on an output field.
1758 If `comint-use-prompt-regexp' is non-nil, then
1759 return the current line with any initial string matching the
1760 regexp `comint-prompt-regexp' removed.
1763 `comint-input-filter' is the default: returns t if the input isn't all white
1764 space.
1766 If the Comint is Lucid Common Lisp,
1767 `comint-get-old-input' snarfs the sexp ending at point.
1768 `comint-input-filter-functions' does nothing.
1769 `comint-input-filter' returns nil if the input matches input-filter-regexp,
1770 which matches (1) all whitespace (2) :a, :c, etc.
1772 Similarly for Soar, Scheme, etc."
1773 (interactive)
1774 ;; Note that the input string does not include its terminal newline.
1775 (let ((proc (get-buffer-process (current-buffer))))
1776 (if (not proc) (user-error "Current buffer has no process")
1777 (widen)
1778 (let* ((pmark (process-mark proc))
1779 (intxt (if (>= (point) (marker-position pmark))
1780 (progn (if comint-eol-on-send (end-of-line))
1781 (buffer-substring pmark (point)))
1782 (let ((copy (funcall comint-get-old-input)))
1783 (goto-char pmark)
1784 (insert copy)
1785 copy)))
1786 (input (if (not (eq comint-input-autoexpand 'input))
1787 ;; Just whatever's already there.
1788 intxt
1789 ;; Expand and leave it visible in buffer.
1790 (comint-replace-by-expanded-history t pmark)
1791 (buffer-substring pmark (point))))
1792 (history (if (not (eq comint-input-autoexpand 'history))
1793 input
1794 ;; This is messy 'cos ultimately the original
1795 ;; functions used do insertion, rather than return
1796 ;; strings. We have to expand, then insert back.
1797 (comint-replace-by-expanded-history t pmark)
1798 (let ((copy (buffer-substring pmark (point)))
1799 (start (point)))
1800 (insert input)
1801 (delete-region pmark start)
1802 copy))))
1804 (unless no-newline
1807 (comint-add-to-input-history history)
1809 (run-hook-with-args 'comint-input-filter-functions
1810 (if no-newline input
1813 (let ((beg (marker-position pmark))
1814 (end (if no-newline (point) (1- (point)))))
1815 (with-silent-modifications
1816 (when (> end beg)
1817 (add-text-properties beg end
1818 '(front-sticky t
1819 font-lock-face comint-highlight-input))
1820 (unless comint-use-prompt-regexp
1821 ;; Give old user input a field property of `input', to
1822 ;; distinguish it from both process output and unsent
1823 ;; input. The terminating newline is put into a special
1824 ;; `boundary' field to make cursor movement between input
1825 ;; and output fields smoother.
1826 (add-text-properties
1827 beg end
1828 '(mouse-face highlight
1829 help-echo "mouse-2: insert after prompt as new input"))))
1830 (unless (or no-newline comint-use-prompt-regexp)
1831 ;; Cover the terminating newline
1832 (add-text-properties end (1+ end)
1833 '(rear-nonsticky t
1834 field boundary
1835 inhibit-line-move-field-capture t)))))
1837 (comint-snapshot-last-prompt)
1839 (setq comint-save-input-ring-index comint-input-ring-index)
1840 (setq comint-input-ring-index nil)
1841 ;; Update the markers before we send the input
1842 ;; in case we get output amidst sending the input.
1843 (set-marker comint-last-input-start pmark)
1844 (set-marker comint-last-input-end (point))
1845 (set-marker (process-mark proc) (point))
1846 ;; clear the "accumulation" marker
1847 (set-marker comint-accum-marker nil)
1848 (let ((comint-input-sender-no-newline no-newline))
1849 (funcall comint-input-sender proc input))
1851 ;; Optionally delete echoed input (after checking it).
1852 (when (and comint-process-echoes (not artificial))
1853 (let ((echo-len (- comint-last-input-end
1854 comint-last-input-start)))
1855 ;; Wait for all input to be echoed:
1856 (while (and (> (+ comint-last-input-end echo-len)
1857 (point-max))
1858 (accept-process-output proc)
1859 (zerop
1860 (compare-buffer-substrings
1861 nil comint-last-input-start
1862 (- (point-max) echo-len)
1863 ;; Above difference is equivalent to
1864 ;; (+ comint-last-input-start
1865 ;; (- (point-max) comint-last-input-end))
1866 nil comint-last-input-end (point-max)))))
1867 (if (and
1868 (<= (+ comint-last-input-end echo-len)
1869 (point-max))
1870 (zerop
1871 (compare-buffer-substrings
1872 nil comint-last-input-start comint-last-input-end
1873 nil comint-last-input-end
1874 (+ comint-last-input-end echo-len))))
1875 ;; Certain parts of the text to be deleted may have
1876 ;; been mistaken for prompts. We have to prevent
1877 ;; problems when `comint-prompt-read-only' is non-nil.
1878 (let ((inhibit-read-only t))
1879 (delete-region comint-last-input-end
1880 (+ comint-last-input-end echo-len))
1881 (when comint-prompt-read-only
1882 (save-excursion
1883 (goto-char comint-last-input-end)
1884 (comint-update-fence)))))))
1886 ;; This used to call comint-output-filter-functions,
1887 ;; but that scrolled the buffer in undesirable ways.
1888 (run-hook-with-args 'comint-output-filter-functions "")))))
1890 (defvar comint-preoutput-filter-functions nil
1891 "List of functions to call before inserting Comint output into the buffer.
1892 Each function gets one argument, a string containing the text received
1893 from the subprocess. It should return the string to insert, perhaps
1894 the same string that was received, or perhaps a modified or transformed
1895 string.
1897 The functions on the list are called sequentially, and each one is
1898 given the string returned by the previous one. The string returned by
1899 the last function is the text that is actually inserted in the
1900 redirection buffer.
1902 You can use `add-hook' to add functions to this list
1903 either globally or locally.")
1905 (defvar comint-inhibit-carriage-motion nil
1906 "If nil, Comint will interpret `carriage control' characters in output.
1907 See `comint-carriage-motion' for details.")
1909 (defvar comint-last-prompt nil
1910 "Markers pointing to the last prompt.
1911 If non-nil, a cons cell containing markers. The car points to
1912 the start, the cdr to the end of the last prompt recognized.")
1914 (defun comint-snapshot-last-prompt ()
1915 "Snapshot the current `comint-last-prompt'.
1916 Freezes the `font-lock-face' text property in place."
1917 (when comint-last-prompt
1918 (with-silent-modifications
1919 (add-text-properties
1920 (car comint-last-prompt)
1921 (cdr comint-last-prompt)
1922 '(font-lock-face comint-highlight-prompt)))
1923 ;; Reset comint-last-prompt so later on comint-output-filter does
1924 ;; not remove the font-lock-face text property of the previous
1925 ;; (this) prompt.
1926 (setq comint-last-prompt nil)))
1928 (defun comint-carriage-motion (start end)
1929 "Interpret carriage control characters in the region from START to END.
1930 Translate carriage return/linefeed sequences to linefeeds.
1931 Make single carriage returns delete to the beginning of the line.
1932 Make backspaces delete the previous character."
1933 (save-excursion
1935 ;; calling save-match-data and save-restriction. But, such a
1936 ;; check is not necessary now because we don't use regexp search
1937 ;; nor save-restriction. Note that the buffer is already widen,
1938 ;; and calling narrow-to-region and widen are not that heavy.
1939 (goto-char start)
1940 (let* ((inhibit-field-text-motion t)
1941 (inhibit-read-only t)
1942 (lbeg (line-beginning-position))
1943 delete-end ch)
1944 ;; If the preceding text is marked as "must-overwrite", record
1945 ;; it in delete-end.
1946 (when (and (> start (point-min))
1947 (get-text-property (1- start) 'comint-must-overwrite))
1948 (setq delete-end (point-marker))
1949 (remove-text-properties lbeg start '(comint-must-overwrite nil)))
1950 (narrow-to-region lbeg end)
1951 ;; Handle BS, LF, and CR specially.
1953 (setq ch (following-char))
1955 (delete-char 1)
1956 (if (> (point) lbeg)
1957 (delete-char -1)))
1959 (when delete-end ; CH = LF
1960 (if (< delete-end (point))
1961 (delete-region lbeg delete-end))
1962 (set-marker delete-end nil)
1963 (setq delete-end nil))
1964 (forward-char 1)
1965 (setq lbeg (point)))
1966 (t ; CH = CR
1967 (delete-char 1)
1968 (if delete-end
1969 (when (< delete-end (point))
1970 (delete-region lbeg delete-end)
1971 (move-marker delete-end (point)))
1972 (setq delete-end (point-marker))))))
1973 (when delete-end
1974 (if (< delete-end (point))
1975 ;; As there's a text after the last CR, make the current
1976 ;; line contain only that text.
1977 (delete-region lbeg delete-end)
1978 ;; Remember that the process output ends by CR, and thus we
1979 ;; must overwrite the contents of the current line next
1980 ;; time.
1981 (put-text-property lbeg delete-end 'comint-must-overwrite t))
1982 (set-marker delete-end nil))
1983 (widen))))
1985 ;; The purpose of using this filter for comint processes
1986 ;; is to keep comint-last-input-end from moving forward
1987 ;; when output is inserted.
1988 (defun comint-output-filter (process string)
1989 (let ((oprocbuf (process-buffer process)))
1990 ;; First check for killed buffer or no input.
1991 (when (and string oprocbuf (buffer-name oprocbuf))
1992 (with-current-buffer oprocbuf
1993 ;; Run preoutput filters
1994 (let ((functions comint-preoutput-filter-functions))
1995 (while (and functions string)
1996 (if (eq (car functions) t)
1997 (let ((functions
1998 (default-value 'comint-preoutput-filter-functions)))
1999 (while (and functions string)
2000 (setq string (funcall (car functions) string))
2001 (setq functions (cdr functions))))
2002 (setq string (funcall (car functions) string)))
2003 (setq functions (cdr functions))))
2005 ;; Insert STRING
2006 (let ((inhibit-read-only t)
2007 ;; The point should float after any insertion we do.
2008 (saved-point (copy-marker (point) t)))
2010 ;; We temporarily remove any buffer narrowing, in case the
2011 ;; process mark is outside of the restriction
2012 (save-restriction
2013 (widen)
2015 (goto-char (process-mark process))
2016 (set-marker comint-last-output-start (point))
2018 ;; Try to skip repeated prompts, which can occur as a result of
2019 ;; commands sent without inserting them in the buffer.
2020 (let ((bol (save-excursion (forward-line 0) (point)))) ;No fields.
2021 (when (and (not (bolp))
2022 (looking-back comint-prompt-regexp bol))
2023 (let* ((prompt (buffer-substring bol (point)))
2025 (while (string-match prompt-re string)
2026 (setq string (substring string (match-end 0)))))))
2029 string)
2032 ;; insert-before-markers is a bad thing. XXX
2033 ;; Luckily we don't have to use it any more, we use
2034 ;; window-point-insertion-type instead.
2035 (insert string)
2037 ;; Advance process-mark
2038 (set-marker (process-mark process) (point))
2040 (unless comint-inhibit-carriage-motion
2041 ;; Interpret any carriage motion characters (newline, backspace)
2042 (comint-carriage-motion comint-last-output-start (point)))
2044 ;; Run these hooks with point where the user had it.
2045 (goto-char saved-point)
2046 (run-hook-with-args 'comint-output-filter-functions string)
2047 (set-marker saved-point (point))
2049 (goto-char (process-mark process)) ; In case a filter moved it.
2051 (unless comint-use-prompt-regexp
2052 (with-silent-modifications
2053 (add-text-properties comint-last-output-start (point)
2054 '(front-sticky
2055 (field inhibit-line-move-field-capture)
2056 rear-nonsticky t
2057 field output
2058 inhibit-line-move-field-capture t))))
2060 ;; Highlight the prompt, where we define `prompt' to mean
2061 ;; the most recent output that doesn't end with a newline.
2062 (let ((prompt-start (save-excursion (forward-line 0) (point)))
2063 (inhibit-read-only t))
2064 (when comint-prompt-read-only
2065 (with-silent-modifications
2066 (or (= (point-min) prompt-start)
2067 (get-text-property (1- prompt-start) 'read-only)
2068 (put-text-property (1- prompt-start)
2069 prompt-start 'read-only 'fence))
2070 (add-text-properties prompt-start (point)
2071 '(read-only t front-sticky (read-only)))))
2072 (when comint-last-prompt
2073 (remove-text-properties (car comint-last-prompt)
2074 (cdr comint-last-prompt)
2075 '(font-lock-face)))
2076 (setq comint-last-prompt
2077 (cons (copy-marker prompt-start) (point-marker)))
2078 (add-text-properties prompt-start (point)
2079 '(rear-nonsticky t
2080 font-lock-face comint-highlight-prompt)))
2081 (goto-char saved-point)))))))
2083 (defun comint-preinput-scroll-to-bottom ()
2084 "Go to the end of buffer in all windows showing it.
2085 Movement occurs if point in the selected window is not after the process mark,
2086 and `this-command' is an insertion command. Insertion commands recognized
2087 are `self-insert-command', `comint-magic-space', `yank', and `hilit-yank'.
2088 Depends on the value of `comint-scroll-to-bottom-on-input'.
2090 This function should be a pre-command hook."
2091 (if (and comint-scroll-to-bottom-on-input
2092 (memq this-command '(self-insert-command comint-magic-space yank
2093 hilit-yank)))
2094 (let* ((current (current-buffer))
2095 (process (get-buffer-process current))
2096 (scroll comint-scroll-to-bottom-on-input))
2097 (if (and process (< (point) (process-mark process)))
2098 (if (eq scroll 'this)
2099 (goto-char (point-max))
2100 (walk-windows
2101 (lambda (window)
2102 (if (and (eq (window-buffer window) current)
2103 (or (eq scroll t) (eq scroll 'all)))
2104 (with-selected-window window
2105 (goto-char (point-max)))))
2106 nil t))))))
2108 (defvar follow-mode)
2109 (declare-function follow-comint-scroll-to-bottom "follow" (&optional window))
2111 (defun comint-postoutput-scroll-to-bottom (_string)
2112 "Go to the end of buffer in some or all windows showing it.
2113 Do not scroll if the current line is the last line in the buffer.
2114 Depends on the value of `comint-move-point-for-output' and
2115 `comint-scroll-show-maximum-output'.
2117 This function should be in the list `comint-output-filter-functions'."
2118 (let* ((current (current-buffer))
2119 (process (get-buffer-process current)))
2120 (unwind-protect
2121 (cond
2122 ((null process))
2123 ((bound-and-true-p follow-mode)
2124 (follow-comint-scroll-to-bottom))
2125 (t
2126 (dolist (w (get-buffer-window-list current nil t))
2127 (comint-adjust-window-point w process)
2128 ;; Optionally scroll to the bottom of the window.
2129 (and comint-scroll-show-maximum-output
2130 (eq (window-point w) (point-max))
2131 (with-selected-window w
2132 (recenter (- -1 scroll-margin)))))))
2133 (set-buffer current))))
2136 (defun comint-adjust-window-point (window process)
2137 "Move point in WINDOW based on Comint settings.
2138 For point adjustment use the process-mark of PROCESS."
2139 (and (< (window-point window) (process-mark process))
2140 (or (memq comint-move-point-for-output '(t all))
2141 ;; Maybe user wants point to jump to end.
2142 (eq comint-move-point-for-output
2143 (if (eq (selected-window) window) 'this 'others))
2144 ;; If point was at the end, keep it at end.
2145 (and (marker-position comint-last-output-start)
2146 (>= (window-point window) comint-last-output-start)))
2147 (set-window-point window (process-mark process))))
2150 ;; this function is nowhere used
2151 (defun comint-adjust-point (selected)
2152 "Move point in the selected window based on Comint settings.
2153 SELECTED is the window that was originally selected."
2154 (let ((process (get-buffer-process (current-buffer))))
2155 (and (< (point) (process-mark process))
2156 (or (memq comint-move-point-for-output '(t all))
2157 ;; Maybe user wants point to jump to end.
2158 (eq comint-move-point-for-output
2159 (if (eq (selected-window) selected) 'this 'others))
2160 ;; If point was at the end, keep it at end.
2161 (and (marker-position comint-last-output-start)
2162 (>= (point) comint-last-output-start)))
2163 (goto-char (process-mark process)))))
2165 (defun comint-truncate-buffer (&optional _string)
2166 "Truncate the buffer to `comint-buffer-maximum-size'.
2167 This function could be on `comint-output-filter-functions' or bound to a key."
2168 (interactive)
2169 (save-excursion
2170 (goto-char (process-mark (get-buffer-process (current-buffer))))
2171 (forward-line (- comint-buffer-maximum-size))
2172 (beginning-of-line)
2173 (let ((inhibit-read-only t))
2174 (delete-region (point-min) (point)))))
2176 (defun comint-strip-ctrl-m (&optional _string)
2177 "Strip trailing `^M' characters from the current output group.
2178 This function could be on `comint-output-filter-functions' or bound to a key."
2179 (interactive)
2180 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2181 (save-excursion
2182 (condition-case nil
2183 (goto-char
2184 (if (called-interactively-p 'interactive)
2185 comint-last-input-end comint-last-output-start))
2186 (error nil))
2188 (replace-match "" t t)))))
2189 (defalias 'shell-strip-ctrl-m 'comint-strip-ctrl-m)
2191 (defun comint-show-maximum-output ()
2192 "Put the end of the buffer at the bottom of the window."
2193 (interactive)
2194 (goto-char (point-max))
2195 (recenter (- -1 scroll-margin)))
2197 (defun comint-get-old-input-default ()
2198 "Default for `comint-get-old-input'.
2199 If `comint-use-prompt-regexp' is nil, then either
2200 return the current input field, if point is on an input field, or the
2201 current line, if point is on an output field.
2202 If `comint-use-prompt-regexp' is non-nil, then return
2203 the current line with any initial string matching the regexp
2204 `comint-prompt-regexp' removed."
2205 (let (bof)
2206 (if (and (not comint-use-prompt-regexp)
2207 ;; Make sure we're in an input rather than output field.
2208 (null (get-char-property (setq bof (field-beginning)) 'field)))
2209 (field-string-no-properties bof)
2210 (comint-bol)
2211 (buffer-substring-no-properties (point) (line-end-position)))))
2213 (defun comint-copy-old-input ()
2214 "Insert after prompt old input at point as new input to be edited.
2215 Calls `comint-get-old-input' to get old input."
2216 (interactive)
2217 (let ((input (funcall comint-get-old-input))
2218 (process (get-buffer-process (current-buffer))))
2219 (if (not process)
2220 (user-error "Current buffer has no process")
2221 (goto-char (process-mark process))
2222 (insert input))))
2224 (defun comint-skip-prompt ()
2225 "Skip past the text matching regexp `comint-prompt-regexp'.
2226 If this takes us past the end of the current line, don't skip at all."
2227 (if (and (looking-at comint-prompt-regexp)
2228 (<= (match-end 0) (line-end-position)))
2229 (goto-char (match-end 0))))
2231 (defun comint-after-pmark-p ()
2232 "Return t if point is after the process output marker."
2233 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2234 (<= (marker-position pmark) (point))))
2236 (defun comint-simple-send (proc string)
2237 "Default function for sending to PROC input STRING.
2238 This just sends STRING plus a newline. To override this,
2239 set the hook `comint-input-sender'."
2240 (let ((send-string
2241 (if comint-input-sender-no-newline
2242 string
2243 ;; Sending as two separate strings does not work
2246 (comint-send-string proc send-string))
2247 (if (and comint-input-sender-no-newline
2248 (not (string-equal string "")))
2249 (process-send-eof)))
2251 (defun comint-line-beginning-position ()
2252 "Return the buffer position of the beginning of the line, after any prompt.
2253 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done by
2254 skipping text matching the regular expression `comint-prompt-regexp',
2255 a buffer local variable."
2256 (if comint-use-prompt-regexp
2257 ;; Use comint-prompt-regexp
2258 (save-excursion
2259 (beginning-of-line)
2260 (comint-skip-prompt)
2261 (point))
2262 ;; Use input fields. Note that, unlike the behavior of
2263 ;; `line-beginning-position' inside a field, this function will
2264 ;; return the position of the end of a prompt, even if the point is
2265 ;; already inside the prompt. In order to do this, it assumes that
2266 ;; if there are two fields on a line, then the first one is the
2267 ;; prompt, and the second one is an input field, and is front-sticky
2268 ;; (as input fields should be).
2269 (constrain-to-field (line-beginning-position) (line-end-position))))
2271 (defun comint-bol (&optional arg)
2272 "Go to the beginning of line, then skip past the prompt, if any.
2274 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done
2275 by skipping text matching the regular expression `comint-prompt-regexp',
2276 a buffer local variable."
2277 (interactive "P")
2278 (if arg
2279 ;; Unlike `beginning-of-line', forward-line ignores field boundaries
2280 (forward-line 0)
2281 (goto-char (comint-line-beginning-position))))
2283 ;; For compatibility.
2284 (defun comint-read-noecho (prompt &optional _ignore)
2285 (read-passwd prompt))
2287 ;; These three functions are for entering text you don't want echoed or
2288 ;; saved -- typically passwords to ftp, telnet, or somesuch.
2289 ;; Just enter m-x send-invisible and type in your line.
2291 (defun send-invisible (&optional prompt)
2292 "Read a string without echoing.
2293 Then send it to the process running in the current buffer.
2294 The string is sent using `comint-input-sender'.
2295 Security bug: your string can still be temporarily recovered with
2297 (interactive "P") ; Defeat snooping via C-x ESC ESC
2298 (let ((proc (get-buffer-process (current-buffer)))
2299 (prefix
2300 (if (eq (window-buffer) (current-buffer))
2301 ""
2302 (format "(In buffer %s) "
2303 (current-buffer)))))
2304 (if proc
2305 (let ((str (read-passwd (concat prefix
2306 (or prompt "Non-echoed text: ")))))
2307 (if (stringp str)
2308 (progn
2309 (comint-snapshot-last-prompt)
2310 (funcall comint-input-sender proc str))
2311 (message "Warning: text will be echoed")))
2312 (error "Buffer %s has no process" (current-buffer)))))
2314 (defun comint-watch-for-password-prompt (string)
2315 "Prompt in the minibuffer for password and send without echoing.
2316 This function uses `send-invisible' to read and send a password to the buffer's
2317 process if STRING contains a password prompt defined by
2318 `comint-password-prompt-regexp'.
2320 This function could be in the list `comint-output-filter-functions'."
2321 (when (string-match comint-password-prompt-regexp string)
2323 (setq string (replace-match "" t t string)))
2324 (send-invisible string)))
2325 \f
2326 ;; Low-level process communication
2328 (defun comint-send-string (process string)
2329 "Like `process-send-string', but also does extra bookkeeping for Comint mode."
2330 (if process
2331 (with-current-buffer (if (processp process)
2332 (process-buffer process)
2333 (get-buffer process))
2334 (comint-snapshot-last-prompt))
2335 (comint-snapshot-last-prompt))
2336 (process-send-string process string))
2338 (defun comint-send-region (process start end)
2339 "Like `process-send-region', but also does extra bookkeeping for Comint mode."
2340 (if process
2341 (with-current-buffer (if (processp process)
2342 (process-buffer process)
2343 (get-buffer process))
2344 (comint-snapshot-last-prompt))
2345 (comint-snapshot-last-prompt))
2346 (process-send-region process start end))
2348 \f
2349 ;; Random input hackage
2351 (defun comint-delete-output ()
2352 "Delete all output from interpreter since last input.
2353 Does not delete the prompt."
2354 (interactive)
2355 (let ((proc (get-buffer-process (current-buffer)))
2356 (replacement nil)
2357 (inhibit-read-only t))
2358 (save-excursion
2359 (let ((pmark (progn (goto-char (process-mark proc))
2360 (forward-line 0)
2361 (point-marker))))
2362 (delete-region comint-last-input-end pmark)
2363 (goto-char (process-mark proc))
2365 (buffer-substring pmark (point))))
2366 (delete-region pmark (point))))
2367 ;; Output message and put back prompt
2368 (comint-output-filter proc replacement)))
2370 (defun comint-write-output (filename &optional append mustbenew)
2371 "Write output from interpreter since last input to FILENAME.
2372 Any prompt at the end of the output is not written.
2374 If the optional argument APPEND (the prefix argument when interactive)
2375 is non-nil, the output is appended to the file instead.
2377 If the optional argument MUSTBENEW is non-nil, check for an existing
2378 file with the same name. If MUSTBENEW is `excl', that means to get an
2379 error if the file already exists; never overwrite. If MUSTBENEW is
2380 neither nil nor `excl', that means ask for confirmation before
2381 overwriting, but do go ahead and overwrite the file if the user
2382 confirms. When interactive, MUSTBENEW is nil when appending, and t
2383 otherwise."
2384 (interactive
2385 (list (read-file-name
2386 (if current-prefix-arg
2387 "Append output to file: "
2388 "Write output to file: "))
2389 current-prefix-arg
2390 (not current-prefix-arg)))
2391 (save-excursion
2392 (goto-char (process-mark (get-buffer-process (current-buffer))))
2393 (forward-line 0)
2394 (write-region comint-last-input-end (point) filename
2395 append nil nil mustbenew)))
2397 ;; This function exists for the benefit of the menu; from the keyboard,
2398 ;; users can just use `comint-write-output' with a prefix arg.
2399 (defun comint-append-output-to-file (filename)
2400 "Append output from interpreter since last input to FILENAME.
2401 Any prompt at the end of the output is not written."
2402 (interactive "fAppend output to file: ")
2403 (comint-write-output filename t))
2405 (defun comint-show-output ()
2406 "Display start of this batch of interpreter output at top of window.
2407 Sets mark to the value of point when this command is run."
2408 (interactive)
2409 (push-mark)
2410 (let ((pos (or (marker-position comint-last-input-end) (point-max))))
2411 (cond (comint-use-prompt-regexp
2412 (goto-char pos)
2413 (beginning-of-line 0)
2414 (set-window-start (selected-window) (point))
2415 (comint-skip-prompt))
2416 (t
2417 (goto-char (field-beginning pos))
2418 (set-window-start (selected-window) (point))))))
2421 (defun comint-interrupt-subjob ()
2422 "Interrupt the current subjob.
2423 This command also kills the pending input
2424 between the process mark and point."
2425 (interactive)
2426 (comint-skip-input)
2427 (interrupt-process nil comint-ptyp)
2429 )
2431 (defun comint-kill-subjob ()
2432 "Send kill signal to the current subjob.
2433 This command also kills the pending input
2434 between the process mark and point."
2435 (interactive)
2436 (comint-skip-input)
2437 (kill-process nil comint-ptyp))
2439 (defun comint-quit-subjob ()
2440 "Send quit signal to the current subjob.
2441 This command also kills the pending input
2442 between the process mark and point."
2443 (interactive)
2444 (comint-skip-input)
2445 (quit-process nil comint-ptyp))
2447 (defun comint-stop-subjob ()
2448 "Stop the current subjob.
2449 This command also kills the pending input
2450 between the process mark and point.
2452 WARNING: if there is no current subjob, you can end up suspending
2453 the top-level process running in the buffer. If you accidentally do
2455 is not a problem with most shells, since they ignore this signal.)"
2456 (interactive)
2457 (comint-skip-input)
2458 (stop-process nil comint-ptyp))
2460 (defun comint-continue-subjob ()
2461 "Send CONT signal to process buffer's process group.
2462 Useful if you accidentally suspend the top-level process."
2463 (interactive)
2464 (continue-process nil comint-ptyp))
2466 (defun comint-skip-input ()
2467 "Skip all pending input, from last stuff output by interpreter to point.
2468 This means mark it as if it had been sent as input, without sending it."
2469 (let ((comint-input-sender 'ignore)
2470 (comint-input-filter-functions nil))
2471 (comint-send-input t t))
2472 (end-of-line)
2473 (let ((pos (point))
2474 (marker (process-mark (get-buffer-process (current-buffer)))))
2475 (insert " " (key-description (this-command-keys)))
2476 (if (= marker pos)
2477 (set-marker marker (point)))))
2479 (defun comint-kill-input ()
2480 "Kill all text from last stuff output by interpreter to point."
2481 (interactive)
2482 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2483 (if (> (point) (marker-position pmark))
2484 (kill-region pmark (point)))))
2486 (defun comint-delchar-or-maybe-eof (arg)
2487 "Delete ARG characters forward or send an EOF to subprocess.
2488 Sends an EOF only if point is at the end of the buffer and there is no input."
2489 (interactive "p")
2490 (let ((proc (get-buffer-process (current-buffer))))
2491 (if (and (eobp) proc (= (point) (marker-position (process-mark proc))))
2492 (comint-send-eof)
2493 (delete-char arg))))
2495 (defun comint-send-eof ()
2496 "Send an EOF to the current buffer's process."
2497 (interactive)
2498 (comint-send-input t t)
2499 (process-send-eof))
2502 (defun comint-backward-matching-input (regexp n)
2503 "Search backward through buffer for input fields that match REGEXP.
2504 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2505 by lines that match `comint-prompt-regexp'.
2507 With prefix argument N, search for Nth previous match.
2508 If N is negative, find the next or Nth next match."
2509 (interactive (comint-regexp-arg "Backward input matching (regexp): "))
2510 (if comint-use-prompt-regexp
2511 ;; Use comint-prompt-regexp
2512 (let* ((re (concat comint-prompt-regexp ".*" regexp))
2513 (pos (save-excursion (end-of-line (if (> n 0) 0 1))
2514 (if (re-search-backward re nil t n)
2515 (point)))))
2516 (if (null pos)
2517 (progn (message "Not found")
2518 (ding))
2519 (goto-char pos)
2520 (comint-bol nil)))
2521 ;; Use input fields
2522 (let* ((dir (if (< n 0) -1 1))
2523 (pos
2524 (save-excursion
2525 (while (/= n 0)
2526 (unless (re-search-backward regexp nil t dir)
2527 (user-error "Not found"))
2528 (unless (get-char-property (point) 'field)
2529 (setq n (- n dir))))
2530 (field-beginning))))
2531 (goto-char pos))))
2534 (defun comint-forward-matching-input (regexp n)
2535 "Search forward through buffer for input fields that match REGEXP.
2536 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2537 by lines that match `comint-prompt-regexp'.
2539 With prefix argument N, search for Nth following match.
2540 If N is negative, find the previous or Nth previous match."
2541 (interactive (comint-regexp-arg "Forward input matching (regexp): "))
2542 (comint-backward-matching-input regexp (- n)))
2545 (defun comint-next-prompt (n)
2546 "Move to end of Nth next prompt in the buffer.
2547 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2548 the Nth next `input' field, otherwise, it means the Nth occurrence of
2549 text matching `comint-prompt-regexp'."
2550 (interactive "p")
2551 (if comint-use-prompt-regexp
2552 ;; Use comint-prompt-regexp
2553 (let ((paragraph-start comint-prompt-regexp))
2554 (end-of-line (if (> n 0) 1 0))
2555 (forward-paragraph n)
2556 (comint-skip-prompt))
2557 ;; Use input fields
2558 (let ((pos (point))
2559 (input-pos nil)
2560 prev-pos)
2561 (while (/= n 0)
2562 (setq prev-pos pos)
2563 (setq pos
2564 (if (> n 0)
2565 (next-single-char-property-change pos 'field)
2566 (previous-single-char-property-change pos 'field)))
2567 (cond ((= pos prev-pos)
2568 ;; Ran off the end of the buffer.
2569 (when (> n 0)
2570 ;; There's always an input field at the end of the
2571 ;; buffer, but it has a `field' property of nil.
2572 (setq input-pos (point-max)))
2573 ;; stop iterating
2574 (setq n 0))
2575 ((null (get-char-property pos 'field))
2576 (setq n (if (< n 0) (1+ n) (1- n)))
2577 (setq input-pos pos))))
2578 (when input-pos
2579 (goto-char input-pos)))))
2582 (defun comint-previous-prompt (n)
2583 "Move to end of Nth previous prompt in the buffer.
2584 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2585 the Nth previous `input' field, otherwise, it means the Nth occurrence of
2586 text matching `comint-prompt-regexp'."
2587 (interactive "p")
2588 (comint-next-prompt (- n)))
2590 ;; State used by `comint-insert-previous-argument' when cycling.
2591 (defvar-local comint-insert-previous-argument-last-start-pos nil)
2592 (defvar-local comint-insert-previous-argument-last-index nil)
2594 ;; Needs fixing:
2595 ;; make comint-arguments understand negative indices as bash does
2596 (defun comint-insert-previous-argument (index)
2597 "Insert the INDEXth argument from the previous Comint command-line at point.
2598 Spaces are added at beginning and/or end of the inserted string if
2599 necessary to ensure that it's separated from adjacent arguments.
2600 Interactively, if no prefix argument is given, the last argument is inserted.
2601 Repeated interactive invocations will cycle through the same argument
2602 from progressively earlier commands (using the value of INDEX specified
2603 with the first command).
2604 This command is like `M-.' in bash."
2605 (interactive "P")
2606 (unless (null index)
2607 (setq index (prefix-numeric-value index)))
2608 (cond ((eq last-command this-command)
2609 ;; Delete last input inserted by this command.
2610 (delete-region comint-insert-previous-argument-last-start-pos (point))
2611 (setq index comint-insert-previous-argument-last-index))
2612 (t
2613 ;; This is a non-repeat invocation, so initialize state.
2614 (setq comint-input-ring-index nil)
2615 (setq comint-insert-previous-argument-last-index index)
2616 (when (null comint-insert-previous-argument-last-start-pos)
2617 ;; First usage; initialize to a marker
2618 (setq comint-insert-previous-argument-last-start-pos
2619 (make-marker)))))
2620 ;; Make sure we're not in the prompt, and add a beginning space if necessary.
2621 (if (<= (point) (comint-line-beginning-position))
2622 (comint-bol)
2623 (just-one-space))
2624 ;; Remember the beginning of what we insert, so we can delete it if
2625 ;; the command is repeated.
2626 (set-marker comint-insert-previous-argument-last-start-pos (point))
2627 ;; Insert the argument.
2628 (let ((input-string (comint-previous-input-string 0)))
2630 ;; strip terminating '&'
2631 (setq input-string (substring input-string 0 (match-beginning 0))))
2632 (insert (comint-arguments input-string index index)))
2633 ;; Make next invocation return arg from previous input
2634 (setq comint-input-ring-index (1+ (or comint-input-ring-index 0)))
2635 ;; Add a terminating space if necessary.
2636 (unless (eolp)
2637 (just-one-space)))
2639 \f
2640 ;; Support editing with `comint-prompt-read-only' set to t.
2642 (defun comint-update-fence ()
2643 "Update read-only status of newline before point.
2644 The `fence' read-only property is used to indicate that a newline
2646 following front-sticky read-only region. This is used to
2647 implement comint read-only prompts. If the text after a newline
2648 changes, the read-only status of that newline may need updating.
2649 That is what this function does.
2651 This function does nothing if point is not at the beginning of a
2652 line, or is at the beginning of the accessible portion of the buffer.
2653 Otherwise, if the character after point has a front-sticky
2654 read-only property, then the preceding newline is given a
2655 read-only property of `fence', unless it already is read-only.
2656 If the character after point does not have a front-sticky
2657 read-only property, any read-only property of `fence' on the
2658 preceding newline is removed."
2659 (let* ((pt (point)) (lst (get-text-property pt 'front-sticky)))
2660 (and (bolp)
2661 (not (bobp))
2662 (with-silent-modifications
2663 (if (and (get-text-property pt 'read-only)
2664 (if (listp lst) (memq 'read-only lst) t))
2665 (unless (get-text-property (1- pt) 'read-only)
2666 (put-text-property (1- pt) pt 'read-only 'fence))
2667 (when (eq (get-text-property (1- pt) 'read-only) 'fence)
2668 (remove-list-of-text-properties (1- pt) pt '(read-only))))))))
2670 (defun comint-kill-whole-line (&optional count)
2671 "Kill current line, ignoring read-only and field properties.
2672 With prefix arg COUNT, kill that many lines starting from the current line.
2673 If COUNT is negative, kill backward. Also kill the preceding newline,
2675 with negative arguments.)
2676 If COUNT is zero, kill current line but exclude the trailing newline.
2677 The read-only status of newlines is updated with `comint-update-fence',
2678 if necessary."
2679 (interactive "p")
2680 (let ((inhibit-read-only t) (inhibit-field-text-motion t))
2681 (kill-whole-line count)
2682 (when (>= count 0) (comint-update-fence))))
2684 (defun comint-kill-region (beg end)
2685 "Like `kill-region', but ignores read-only properties, if safe.
2686 This command assumes that the buffer contains read-only
2688 properties at the beginning of a line, with the preceding newline
2689 being read-only to protect the prompt. This is true of the
2690 comint prompts if `comint-prompt-read-only' is non-nil. This
2691 command will not delete the region if this would create mutilated
2692 or out of place prompts. That is, if any part of a prompt is
2693 deleted, the entire prompt must be deleted and all remaining
2694 prompts should stay at the beginning of a line. If this is not
2695 the case, this command just calls `kill-region' with all
2696 read-only properties intact. The read-only status of newlines is
2697 updated using `comint-update-fence', if necessary."
2698 (interactive "r")
2699 (save-excursion
2700 (let* ((true-beg (min beg end))
2701 (true-end (max beg end))
2702 (beg-bolp (progn (goto-char true-beg) (bolp)))
2703 (beg-lst (get-text-property true-beg 'front-sticky))
2704 (beg-bad (and (get-text-property true-beg 'read-only)
2705 (if (listp beg-lst) (memq 'read-only beg-lst) t)))
2706 (end-bolp (progn (goto-char true-end) (bolp)))
2707 (end-lst (get-text-property true-end 'front-sticky))
2708 (end-bad (and (get-text-property true-end 'read-only)
2709 (if (listp end-lst) (memq 'read-only end-lst) t))))
2710 (if (or (and (not beg-bolp) (or beg-bad end-bad))
2711 (and (not end-bolp) end-bad))
2712 (kill-region beg end)
2713 (let ((inhibit-read-only t))
2714 (kill-region beg end)
2715 (comint-update-fence))))))
2716 \f
2717 ;; Support for source-file processing commands.
2718 ;;============================================================================
2719 ;; Many command-interpreters (e.g., Lisp, Scheme, Soar) have
2720 ;; commands that process files of source text (e.g. loading or compiling
2721 ;; files). So the corresponding process-in-a-buffer modes have commands
2722 ;; for doing this (e.g., lisp-load-file). The functions below are useful
2723 ;; for defining these commands.
2724 ;;
2725 ;; Alas, these guys don't do exactly the right thing for Lisp, Scheme
2726 ;; and Soar, in that they don't know anything about file extensions.
2727 ;; So the compile/load interface gets the wrong default occasionally.
2728 ;; The load-file/compile-file default mechanism could be smarter -- it
2729 ;; doesn't know about the relationship between filename extensions and
2730 ;; whether the file is source or executable. If you compile foo.lisp
2731 ;; with compile-file, then the next load-file should use foo.bin for
2732 ;; the default, not foo.lisp. This is tricky to do right, particularly
2733 ;; because the extension for executable files varies so much (.o, .bin,
2734 ;; .lbin, .mo, .vo, .ao, ...).
2737 ;; COMINT-SOURCE-DEFAULT -- determines defaults for source-file processing
2738 ;; commands.
2739 ;;
2740 ;; COMINT-CHECK-SOURCE -- if FNAME is in a modified buffer, asks you if you
2741 ;; want to save the buffer before issuing any process requests to the command
2742 ;; interpreter.
2743 ;;
2744 ;; COMINT-GET-SOURCE -- used by the source-file processing commands to prompt
2745 ;; for the file to process.
2747 (defun comint-source-default (previous-dir/file source-modes)
2748 "Compute the defaults for `load-file' and `compile-file' commands.
2750 PREVIOUS-DIR/FILE is a pair (DIRECTORY . FILENAME) from the last
2751 source-file processing command, or nil if there hasn't been one yet.
2752 SOURCE-MODES is a list used to determine what buffers contain source
2753 files: if the major mode of the buffer is in SOURCE-MODES, it's source.
2754 Typically, (lisp-mode) or (scheme-mode).
2756 If the command is given while the cursor is inside a string, *and*
2757 the string is an existing filename, *and* the filename is not a directory,
2758 then the string is taken as default. This allows you to just position
2759 your cursor over a string that's a filename and have it taken as default.
2761 If the command is given in a file buffer whose major mode is in
2762 SOURCE-MODES, then the filename is the default file, and the
2763 file's directory is the default directory.
2765 If the buffer isn't a source file buffer (e.g., it's the process buffer),
2766 then the default directory & file are what was used in the last source-file
2767 processing command (i.e., PREVIOUS-DIR/FILE). If this is the first time
2768 the command has been run (PREVIOUS-DIR/FILE is nil), the default directory
2771 SOURCE-MODES is typically going to be something like (tea-mode)
2772 for T programs, (lisp-mode) for Lisp programs, (soar-mode lisp-mode)
2773 for Soar programs, etc.
2775 The function returns a pair: (default-directory . default-file)."
2776 (cond ((and buffer-file-name (memq major-mode source-modes))
2777 (cons (file-name-directory buffer-file-name)
2778 (file-name-nondirectory buffer-file-name)))
2779 (previous-dir/file)
2780 (t
2781 (cons default-directory nil))))
2784 (defun comint-check-source (fname)
2785 "Check whether to save buffers visiting file FNAME.
2786 Prior to loading or compiling (or otherwise processing) a file (in the CMU
2787 process-in-a-buffer modes), this function can be called on the filename.
2788 If the file is loaded into a buffer, and the buffer is modified, the user
2789 is queried to see if he wants to save the buffer before proceeding with
2790 the load or compile."
2791 (let ((buff (get-file-buffer fname)))
2792 (if (and buff
2793 (buffer-modified-p buff)
2794 (y-or-n-p (format "Save buffer %s first? " (buffer-name buff))))
2795 (with-current-buffer buff
2796 (save-buffer)))))
2798 (defun comint-extract-string ()
2799 "Return string around point, or nil."
2800 (let ((syntax (syntax-ppss)))
2801 (when (nth 3 syntax)
2802 (condition-case ()
2803 (buffer-substring-no-properties (1+ (nth 8 syntax))
2804 (progn (goto-char (nth 8 syntax))
2805 (forward-sexp)
2806 (1- (point))))
2807 (error nil)))))
2809 (defun comint-get-source (prompt prev-dir/file source-modes mustmatch-p)
2810 "Prompt for filenames in commands that process source files,
2811 e.g. loading or compiling a file.
2812 Provides a default, if there is one, and returns the result filename.
2814 See `comint-source-default' for more on determining defaults.
2816 PROMPT is the prompt string. PREV-DIR/FILE is the (DIRECTORY . FILE) pair
2817 from the last source processing command. SOURCE-MODES is a list of major
2818 modes used to determine what file buffers contain source files. (These
2819 two arguments are used for determining defaults.) If MUSTMATCH-P is true,
2820 then the filename reader will only accept a file that exists.
2822 A typical use:
2824 '(lisp-mode) t))"
2825 (let* ((def (comint-source-default prev-dir/file source-modes))
2826 (stringfile (comint-extract-string))
2827 (sfile-p (and stringfile
2828 (condition-case ()
2829 (file-exists-p stringfile)
2830 (error nil))
2831 (not (file-directory-p stringfile))))
2832 (defdir (if sfile-p (file-name-directory stringfile)
2833 (car def)))
2834 (deffile (if sfile-p (file-name-nondirectory stringfile)
2835 (cdr def)))
2836 (ans (read-file-name (if deffile (format "%s(default %s) "
2837 prompt deffile)
2838 prompt)
2839 defdir
2840 (concat defdir deffile)
2841 mustmatch-p)))
2842 (list (expand-file-name (substitute-in-file-name ans)))))
2844 ;; I am somewhat divided on this string-default feature. It seems
2845 ;; to violate the principle-of-least-astonishment, in that it makes
2846 ;; the default harder to predict, so you actually have to look and see
2847 ;; what the default really is before choosing it. This can trip you up.
2848 ;; On the other hand, it can be useful, I guess. I would appreciate feedback
2849 ;; on this.
2850 ;; -Olin
2852 \f
2853 ;; Simple process query facility.
2854 ;; ===========================================================================
2855 ;; This function is for commands that want to send a query to the process
2856 ;; and show the response to the user. For example, a command to get the
2857 ;; arglist for a Common Lisp function might send a "(arglist 'foo)" query
2858 ;; to an inferior Common Lisp process.
2859 ;;
2860 ;; This simple facility just sends strings to the inferior process and pops
2861 ;; up a window for the process buffer so you can see what the process
2862 ;; responds with. We don't do anything fancy like try to intercept what the
2863 ;; process responds with and put it in a pop-up window or on the message
2864 ;; line. We just display the buffer. Low tech. Simple. Works good.
2866 (defun comint-proc-query (proc str)
2867 "Send to the inferior process PROC the string STR.
2868 Pop-up but do not select a window for the inferior process so that
2869 its response can be seen."
2870 (let* ((proc-buf (process-buffer proc))
2871 (proc-mark (process-mark proc)))
2872 (display-buffer proc-buf)
2873 (set-buffer proc-buf) ; but it's not the selected *window*
2874 (let ((proc-win (get-buffer-window proc-buf 0))
2875 (proc-pt (marker-position proc-mark)))
2876 (comint-send-string proc str) ; send the query
2877 (accept-process-output proc) ; wait for some output
2878 ;; Try to position the proc window so you can see the answer.
2879 ;; This is bogus code. If you delete the (sit-for 0), it breaks.
2880 ;; I don't know why. Wizards invited to improve it.
2881 (unless (pos-visible-in-window-p proc-pt proc-win)
2882 (let ((opoint (window-point proc-win)))
2883 (set-window-point proc-win proc-mark)
2884 (sit-for 0)
2885 (if (not (pos-visible-in-window-p opoint proc-win))
2886 (push-mark opoint)
2887 (set-window-point proc-win opoint)))))))
2889 \f
2890 ;; Filename/command/history completion in a buffer
2891 ;; ===========================================================================
2892 ;; Useful completion functions, courtesy of the Ergo group.
2894 ;; Six commands:
2895 ;; completion-at-point Complete or expand command, filename,
2896 ;; history at point.
2897 ;; comint-dynamic-complete-filename Complete filename at point.
2898 ;; comint-dynamic-list-filename-completions List completions in help buffer.
2899 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
2900 ;; replace with expanded/completed name.
2902 ;; These are not installed in the comint-mode keymap. But they are
2903 ;; available for people who want them. Shell-mode installs them:
2905 ;; (define-key shell-mode-map "\M-?"
2906 ;; 'comint-dynamic-list-filename-completions)))
2907 ;;
2908 ;; Commands like this are fine things to put in load hooks if you
2909 ;; want them present in specific modes.
2911 (defcustom comint-completion-autolist nil
2912 "If non-nil, automatically list possibilities on partial completion.
2913 This mirrors the optional behavior of tcsh."
2914 :type 'boolean
2915 :group 'comint-completion)
2917 (defcustom comint-completion-addsuffix t
2918 "If non-nil, add ` ' to file names.
2919 It can either be a string FILESUFFIX or a cons (DIRSUFFIX . FILESUFFIX)
2920 where DIRSUFFIX is ignored and FILESUFFIX is a string added on unambiguous
2921 or exact completion.
2922 This mirrors the optional behavior of tcsh."
2923 :type '(choice (const :tag "None" nil)
2924 (const :tag "Add SPC" t)
2925 (string :tag "File suffix")
2926 (cons :tag "Obsolete suffix pair"
2927 (string :tag "Ignored")
2928 (string :tag "File suffix")))
2929 :group 'comint-completion)
2931 (defcustom comint-completion-recexact nil
2932 "If non-nil, use shortest completion if characters cannot be added.
2933 This mirrors the optional behavior of tcsh.
2935 A non-nil value is useful if `comint-completion-autolist' is non-nil too."
2936 :type 'boolean
2937 :group 'comint-completion)
2939 (defcustom comint-completion-fignore nil
2940 "List of suffixes to be disregarded during file completion.
2941 This mirrors the optional behavior of bash and tcsh.
2943 Note that this applies to `comint-dynamic-complete-filename' only."
2944 :type '(repeat (string :tag "Suffix"))
2945 :group 'comint-completion)
2947 ;;;###autoload
2948 (defvar comint-file-name-prefix (purecopy "")
2949 "Prefix prepended to absolute file names taken from process input.
2950 This is used by Comint's and shell's completion functions, and by shell's
2951 directory tracking functions.")
2953 (defvar comint-file-name-chars
2954 (if (memq system-type '(ms-dos windows-nt cygwin))
2955 "~/A-Za-z0-9_^$!#%&{}@`'.,:()-"
2956 "[]~/A-Za-z0-9+@:_.$#%,={}-")
2957 "String of characters valid in a file name.
2958 Note that all non-ASCII characters are considered valid in a file name
2959 regardless of what this variable says.
2961 This is a good thing to set in mode hooks.")
2963 (defvar comint-file-name-quote-list nil
2966 This is a good thing to set in mode hooks.")
2969 (defun comint-directory (directory)
2970 "Return expanded DIRECTORY, with `comint-file-name-prefix' if absolute."
2971 (expand-file-name (if (file-name-absolute-p directory)
2972 (concat comint-file-name-prefix directory)
2973 directory)))
2976 (defun comint-word (word-chars)
2977 "Return the word of WORD-CHARS at point, or nil if none is found.
2978 Word constituents are considered to be those in WORD-CHARS, which is like the
2980 ;; FIXME: Need to handle "..." and '...' quoting in shell.el!
2981 ;; This should be combined with completion parsing somehow.
2982 (save-excursion
2983 (let ((here (point))
2984 giveup)
2985 (while (not giveup)
2986 (let ((startpoint (point)))
2988 (if (and comint-file-name-quote-list
2990 (forward-char -2))
2991 ;; FIXME: This isn't consistent with Bash, at least -- not
2992 ;; all non-ASCII chars should be word constituents.
2993 (if (and (not (bobp)) (>= (char-before) 128))
2994 (forward-char -1))
2995 (if (= (point) startpoint)
2996 (setq giveup t))))
2997 ;; Set match-data to match the entire string.
2998 (when (< (point) here)
2999 (set-match-data (list (point) here))
3000 (match-string 0)))))
3002 (defun comint-substitute-in-file-name (filename)
3003 "Return FILENAME with environment variables substituted.
3004 Supports additional environment variable syntax of the command
3005 interpreter (e.g., the percent notation of cmd.exe on Windows)."
3006 (let ((name (substitute-in-file-name filename)))
3007 (if (memq system-type '(ms-dos windows-nt))
3008 (let (env-var-name
3009 env-var-val)
3010 (save-match-data
3012 (setq env-var-name (match-string 1 name))
3013 (setq env-var-val (or (getenv env-var-name) ""))
3014 (setq name (replace-match env-var-val t t name))))))
3015 name))
3017 (defun comint--match-partial-filename ()
3018 "Return the filename at point as-is, or nil if none is found.
3019 See `comint-word'."
3020 (comint-word comint-file-name-chars))
3022 (defun comint--unquote&requote-argument (qstr &optional upos)
3023 (unless upos (setq upos 0))
3024 (let* ((qpos 0)
3025 (ustrs '())
3026 (re (concat
3029 (when (memq system-type '(ms-dos windows-nt))
3031 (when comint-file-name-quote-list
3033 (qupos nil)
3034 (push (lambda (str end)
3035 (push str ustrs)
3036 (setq upos (- upos (length str)))
3037 (unless (or qupos (> upos 0))
3038 (setq qupos (if (< end 0) (- end) (+ upos end))))))
3039 match)
3040 (while (setq match (string-match re qstr qpos))
3041 (funcall push (substring qstr qpos match) match)
3042 (cond
3043 ((match-beginning 2) (funcall push (match-string 2 qstr) (match-end 0)))
3044 ((match-beginning 1) (funcall push (getenv (match-string 1 qstr))
3045 (- (match-end 0))))
3046 (t (error "Unexpected case in comint--unquote&requote-argument!")))
3047 (setq qpos (match-end 0)))
3048 (funcall push (substring qstr qpos) (length qstr))
3049 (list (mapconcat #'identity (nreverse ustrs) "")
3050 qupos #'comint-quote-filename)))
3052 (defun comint--unquote-argument (str)
3053 (car (comint--unquote&requote-argument str)))
3054 (define-obsolete-function-alias 'comint--unquote&expand-filename
3055 #'comint--unquote-argument "24.3")
3057 (defun comint-match-partial-filename ()
3058 "Return the unquoted&expanded filename at point, or nil if none is found.
3059 Environment variables are substituted. See `comint-word'."
3060 (let ((filename (comint--match-partial-filename)))
3061 (and filename (comint--unquote-argument filename))))
3063 (defun comint-quote-filename (filename)
3064 "Return FILENAME with magic characters quoted.
3065 Magic characters are those in `comint-file-name-quote-list'."
3066 (if (null comint-file-name-quote-list)
3067 filename
3068 (let ((regexp (regexp-opt-charset comint-file-name-quote-list)))
3069 (save-match-data
3070 (let ((i 0))
3071 (while (string-match regexp filename i)
3073 (setq i (1+ (match-end 0)))))
3074 filename))))
3076 (defun comint-unquote-filename (filename)
3077 "Return FILENAME with quoted characters unquoted."
3078 (declare (obsolete nil "24.3"))
3079 (if (null comint-file-name-quote-list)
3080 filename
3081 (save-match-data
3084 (defun comint--requote-argument (upos qstr)
3085 ;; See `completion-table-with-quoting'.
3086 (let ((res (comint--unquote&requote-argument qstr upos)))
3087 (cons (nth 1 res) (nth 2 res))))
3089 (defun comint-completion-at-point ()
3090 (run-hook-with-args-until-success 'comint-dynamic-complete-functions))
3092 (define-obsolete-function-alias
3093 'comint-dynamic-complete
3094 'completion-at-point "24.1")
3096 (defun comint-dynamic-complete-filename ()
3097 "Dynamically complete the filename at point.
3098 Completes if after a filename.
3099 This function is similar to `comint-replace-by-expanded-filename', except that
3100 it won't change parts of the filename already entered in the buffer; it just
3101 adds completion characters to the end of the filename. A completions listing
3102 may be shown in a separate buffer if completion is ambiguous.
3104 Completion is dependent on the value of `comint-completion-addsuffix',
3105 `comint-completion-recexact' and `comint-completion-fignore', and the timing of
3106 completions listing is dependent on the value of `comint-completion-autolist'.
3108 Returns t if successful."
3109 (interactive)
3110 (when (comint--match-partial-filename)
3111 (unless (window-minibuffer-p)
3112 (message "Completing file name..."))
3113 (let ((data (comint--complete-file-name-data)))
3114 (completion-in-region (nth 0 data) (nth 1 data) (nth 2 data)))))
3116 (defun comint-filename-completion ()
3117 "Return completion data for filename at point, if any."
3118 (when (comint--match-partial-filename)
3119 (comint--complete-file-name-data)))
3121 (defun comint-completion-file-name-table (string pred action)
3122 (if (not (file-name-absolute-p string))
3123 (completion-file-name-table string pred action)
3124 (cond
3125 ((memq action '(t lambda))
3126 (completion-file-name-table
3127 (concat comint-file-name-prefix string) pred action))
3128 ((null action)
3129 (let ((res (completion-file-name-table
3130 (concat comint-file-name-prefix string) pred action)))
3131 (if (and (stringp res)
3132 (string-match
3134 res))
3135 (substring res (match-end 0))
3136 res)))
3137 (t (completion-file-name-table string pred action)))))
3139 (defvar comint-unquote-function #'comint--unquote-argument
3140 "Function to use for completion of quoted data.
3141 See `completion-table-with-quoting' and `comint-requote-function'.")
3142 (defvar comint-requote-function #'comint--requote-argument
3143 "Function to use for completion of quoted data.
3144 See `completion-table-with-quoting' and `comint-unquote-function'.")
3146 (defun comint--complete-file-name-data ()
3147 "Return the completion data for file name at point."
3148 (let* ((filesuffix (cond ((not comint-completion-addsuffix) "")
3149 ((stringp comint-completion-addsuffix)
3150 comint-completion-addsuffix)
3151 ((not (consp comint-completion-addsuffix)) " ")
3152 (t (cdr comint-completion-addsuffix))))
3153 (filename (comint--match-partial-filename))
3154 (filename-beg (if filename (match-beginning 0) (point)))
3155 (filename-end (if filename (match-end 0) (point)))
3156 (table
3157 (completion-table-with-quoting
3158 #'comint-completion-file-name-table
3159 comint-unquote-function
3160 comint-requote-function)))
3161 (nconc
3162 (list
3163 filename-beg filename-end
3164 (lambda (string pred action)
3165 (let ((completion-ignore-case read-file-name-completion-ignore-case)
3166 (completion-ignored-extensions comint-completion-fignore))
3167 (complete-with-action action table string pred))))
3168 (unless (zerop (length filesuffix))
3169 (list :exit-function
3170 (lambda (_s status)
3171 (when (eq status 'finished)
3172 (if (looking-at (regexp-quote filesuffix))
3173 (goto-char (match-end 0))
3174 (insert filesuffix)))))))))
3176 (defun comint-dynamic-complete-as-filename ()
3177 "Dynamically complete at point as a filename.
3178 See `comint-dynamic-complete-filename'. Returns t if successful."
3179 (declare (obsolete comint-filename-completion "24.1"))
3180 (let ((data (comint--complete-file-name-data)))
3181 (completion-in-region (nth 0 data) (nth 1 data) (nth 2 data))))
3183 (defun comint-replace-by-expanded-filename ()
3184 "Dynamically expand and complete the filename at point.
3185 Replace the filename with an expanded, canonicalized and
3186 completed replacement, i.e. substituting environment
3187 variables (e.g. $HOME), `~'s, `..', and `.', and making the
3188 filename absolute. For expansion see `expand-file-name' and
3189 `substitute-in-file-name'. For completion see
3190 `comint-dynamic-complete-filename'."
3191 (interactive)
3192 (let ((filename (comint-match-partial-filename)))
3193 (when filename
3194 (replace-match (expand-file-name filename) t t)
3195 (comint-dynamic-complete-filename))))
3198 (defun comint-dynamic-simple-complete (stub candidates)
3199 "Dynamically complete STUB from CANDIDATES list.
3200 This function inserts completion characters at point by
3201 completing STUB from the strings in CANDIDATES. If completion is
3202 ambiguous, possibly show a completions listing in a separate
3203 buffer.
3205 Return nil if no completion was inserted.
3206 Return `sole' if completed with the only completion match.
3207 Return `shortest' if completed with the shortest match.
3208 Return `partial' if completed as far as possible.
3209 Return `listed' if a completion listing was shown.
3211 See also `comint-dynamic-complete-filename'."
3212 (declare (obsolete completion-in-region "24.1"))
3213 (let* ((completion-ignore-case (memq system-type '(ms-dos windows-nt cygwin)))
3214 (minibuffer-p (window-minibuffer-p))
3215 (suffix (cond ((not comint-completion-addsuffix) "")
3216 ((not (consp comint-completion-addsuffix)) " ")
3217 (t (cdr comint-completion-addsuffix))))
3218 (completions (all-completions stub candidates)))
3219 (cond ((null completions)
3220 (if minibuffer-p
3221 (minibuffer-message "No completions of %s" stub)
3222 (message "No completions of %s" stub))
3223 nil)
3224 ((= 1 (length completions)) ; Gotcha!
3225 (let ((completion (car completions)))
3226 (if (string-equal completion stub)
3227 (unless minibuffer-p
3228 (message "Sole completion"))
3229 (insert (substring completion (length stub)))
3230 (unless minibuffer-p
3231 (message "Completed")))
3232 (insert suffix)
3233 'sole))
3234 (t ; There's no unique completion.
3235 (let ((completion (try-completion stub candidates)))
3236 ;; Insert the longest substring.
3237 (insert (substring completion (length stub)))
3238 (cond ((and comint-completion-recexact comint-completion-addsuffix
3239 (string-equal stub completion)
3240 (member completion completions))
3241 ;; It's not unique, but user wants shortest match.
3242 (insert suffix)
3243 (unless minibuffer-p
3244 (message "Completed shortest"))
3245 'shortest)
3246 ((or comint-completion-autolist
3247 (string-equal stub completion))
3248 ;; It's not unique, list possible completions.
3249 (comint-dynamic-list-completions completions stub)
3250 'listed)
3251 (t
3252 (unless minibuffer-p
3253 (message "Partially completed"))
3254 'partial)))))))
3256 (defun comint-dynamic-list-filename-completions ()
3257 "Display a list of possible completions for the filename at point."
3258 (interactive)
3259 (let* ((data (comint--complete-file-name-data))
3260 (minibuffer-completion-table (nth 2 data))
3261 (minibuffer-completion-predicate nil)
3262 (ol (make-overlay (nth 0 data) (nth 1 data) nil nil t)))
3263 (overlay-put ol 'field 'completion)
3264 (unwind-protect
3265 (call-interactively 'minibuffer-completion-help)
3266 (delete-overlay ol))))
3269 ;; This is bound locally in a *Completions* buffer to the list of
3270 ;; completions displayed, and is used to detect the case where the same
3271 ;; command is repeatedly used without the set of completions changing.
3272 (defvar comint-displayed-dynamic-completions nil)
3274 (defvar comint-dynamic-list-completions-config nil)
3276 (defun comint-dynamic-list-completions (completions &optional common-substring)
3277 "Display a list of sorted COMPLETIONS.
3278 The meaning of COMMON-SUBSTRING is the same as in `display-completion-list'.
3279 Typing SPC flushes the completions buffer."
3280 (let ((window (get-buffer-window "*Completions*" 0)))
3281 (setq completions (sort completions 'string-lessp))
3282 (if (and (eq last-command this-command)
3283 window (window-live-p window) (window-buffer window)
3284 (buffer-name (window-buffer window))
3285 ;; The above tests are not sufficient to detect the case where we
3286 ;; should scroll, because the top-level interactive command may
3287 ;; not have displayed a completions window the last time it was
3288 ;; invoked, and there may be such a window left over from a
3289 ;; previous completion command with a different set of
3290 ;; completions. To detect that case, we also test that the set
3291 ;; of displayed completions is in fact the same as the previously
3292 ;; displayed set.
3293 (equal completions
3294 (buffer-local-value 'comint-displayed-dynamic-completions
3295 (window-buffer window))))
3296 ;; If this command was repeated, and
3297 ;; there's a fresh completion window with a live buffer,
3298 ;; and this command is repeated, scroll that window.
3299 (with-current-buffer (window-buffer window)
3300 (if (pos-visible-in-window-p (point-max) window)
3301 (set-window-start window (point-min))
3302 (save-selected-window
3303 (select-window window)
3304 (scroll-up))))
3306 ;; Display a completion list for the first time.
3307 (setq comint-dynamic-list-completions-config
3308 (current-window-configuration))
3309 (with-output-to-temp-buffer "*Completions*"
3310 (display-completion-list completions common-substring))
3311 (if (window-minibuffer-p)
3312 (minibuffer-message "Type space to flush; repeat completion command to scroll")
3313 (message "Type space to flush; repeat completion command to scroll")))
3315 ;; Read the next key, to process SPC.
3316 (let (key first)
3317 (if (with-current-buffer (get-buffer "*Completions*")
3318 (setq-local comint-displayed-dynamic-completions
3319 completions)
3320 (setq key (read-key-sequence nil)
3321 first (aref key 0))
3322 (and (consp first) (consp (event-start first))
3323 (eq (window-buffer (posn-window (event-start first)))
3324 (get-buffer "*Completions*"))
3325 (eq (key-binding key) 'mouse-choose-completion)))
3326 ;; If the user does mouse-choose-completion with the mouse,
3327 ;; execute the command, then delete the completion window.
3328 (progn
3329 (choose-completion first)
3330 (set-window-configuration comint-dynamic-list-completions-config))
3331 (if (eq first ?\s)
3332 (set-window-configuration comint-dynamic-list-completions-config)
3333 (setq unread-command-events (listify-key-sequence key)))))))
3334 \f
3335 (defun comint-get-next-from-history ()
3336 "After fetching a line from input history, this fetches the following line.
3337 In other words, this recalls the input line after the line you recalled last.
3338 You can use this to repeat a sequence of input lines."
3339 (interactive)
3340 (if comint-save-input-ring-index
3341 (progn
3342 (setq comint-input-ring-index (1+ comint-save-input-ring-index))
3343 (comint-next-input 1))
3344 (message "No previous history command")))
3346 (defun comint-accumulate ()
3347 "Accumulate a line to send as input along with more lines.
3348 This inserts a newline so that you can enter more text
3350 to send all the accumulated input, at once.
3351 The entire accumulated text becomes one item in the input history
3352 when you send it."
3353 (interactive)
3355 (set-marker comint-accum-marker (point))
3356 (if comint-input-ring-index
3357 (setq comint-save-input-ring-index
3358 (- comint-input-ring-index 1))))
3360 (defun comint-goto-process-mark ()
3361 "Move point to the process mark.
3362 The process mark separates output, and input already sent,
3363 from input that has not yet been sent."
3364 (interactive)
3365 (let ((proc (or (get-buffer-process (current-buffer))
3366 (user-error "Current buffer has no process"))))
3367 (goto-char (process-mark proc))
3368 (when (called-interactively-p 'interactive)
3369 (message "Point is now at the process mark"))))
3371 (defun comint-bol-or-process-mark ()
3372 "Move point to beginning of line (after prompt) or to the process mark.
3373 The first time you use this command, it moves to the beginning of the line
3374 \(but after the prompt, if any). If you repeat it again immediately,
3375 it moves point to the process mark.
3377 The process mark separates the process output, along with input already sent,
3378 from input that has not yet been sent. Ordinarily, the process mark
3379 is at the beginning of the current input line; but if you have
3381 the process mark is at the beginning of the accumulated input."
3382 (interactive)
3383 (if (not (eq last-command 'comint-bol-or-process-mark))
3384 (comint-bol nil)
3385 (comint-goto-process-mark)))
3387 (defun comint-set-process-mark ()
3388 "Set the process mark at point."
3389 (interactive)
3390 (let ((proc (or (get-buffer-process (current-buffer))
3391 (user-error "Current buffer has no process"))))
3392 (set-marker (process-mark proc) (point))
3393 (message "Process mark set")))
3395 \f
3396 ;; Author: Peter Breton <pbreton@cs.umb.edu>
3398 ;; This little add-on for comint is intended to make it easy to get
3399 ;; output from currently active comint buffers into another buffer,
3400 ;; or buffers, and then go back to using the comint shell.
3401 ;;
3402 ;; My particular use is SQL interpreters; I want to be able to execute a
3403 ;; query using the process associated with a comint-buffer, and save that
3404 ;; somewhere else. Because the process might have state (for example, it
3405 ;; could be in an uncommitted transaction), just running starting a new
3406 ;; process and having it execute the query and then finish, would not
3407 ;; work. I'm sure there are other uses as well, although in many cases
3408 ;; starting a new process is the simpler, and thus preferable, approach.
3409 ;;
3410 ;; The basic implementation is as follows: comint-redirect changes the
3411 ;; preoutput filter functions (`comint-preoutput-filter-functions') to use
3412 ;; its own filter. The filter puts the output into the designated buffer,
3413 ;; or buffers, until it sees a regexp that tells it to stop (by default,
3414 ;; this is the prompt for the interpreter, `comint-prompt-regexp'). When it
3415 ;; sees the stop regexp, it restores the old filter functions, and runs
3416 ;; `comint-redirect-hook'.
3417 ;;
3418 ;; Each comint buffer may only use one redirection at a time, but any number
3419 ;; of different comint buffers may be simultaneously redirected.
3420 ;;
3421 ;; NOTE: It is EXTREMELY important that `comint-prompt-regexp' be set to the
3422 ;; correct prompt for your interpreter, or that you supply a regexp that says
3423 ;; when the redirection is finished. Otherwise, redirection will continue
3424 ;; indefinitely. The code now does a sanity check to ensure that it can find
3425 ;; a prompt in the comint buffer; however, it is still important to ensure that
3426 ;; this prompt is set correctly.
3427 ;;
3428 ;; XXX: This doesn't work so well unless `comint-prompt-regexp' is set;
3429 ;; perhaps it should prompt for a terminating string (with an
3430 ;; appropriate magic default by examining what we think is the prompt)?
3431 ;;
3432 ;; Fixme: look for appropriate fields, rather than regexp, if
3433 ;; `comint-use-prompt-regexp' is true.
3435 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3436 ;; Variables
3437 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3439 (defcustom comint-redirect-verbose nil
3440 "If non-nil, print messages each time the redirection filter is invoked.
3441 Also print a message when redirection is completed."
3442 :group 'comint
3443 :type 'boolean)
3445 ;; Directly analogous to comint-preoutput-filter-functions
3446 (defvar comint-redirect-filter-functions nil
3447 "List of functions to call before inserting redirected process output.
3448 Each function gets one argument, a string containing the text received
3449 from the subprocess. It should return the string to insert, perhaps
3450 the same string that was received, or perhaps a modified or transformed
3451 string.
3453 The functions on the list are called sequentially, and each one is given
3454 the string returned by the previous one. The string returned by the
3455 last function is the text that is actually inserted in the redirection buffer.
3457 You can use `add-hook' to add functions to this list
3458 either globally or locally.")
3460 ;; Internal variables
3462 (defvar comint-redirect-output-buffer nil
3463 "The buffer or list of buffers to put output into.")
3465 (defvar comint-redirect-finished-regexp nil
3466 "Regular expression that determines when to stop redirection in Comint.
3467 When the redirection filter function is given output that matches this regexp,
3468 the output is inserted as usual, and redirection is completed.")
3470 (defvar comint-redirect-insert-matching-regexp nil
3471 "If non-nil, the text that ends a redirection is included in it.
3472 More precisely, the text that matches `comint-redirect-finished-regexp'
3473 and therefore terminates an output redirection is inserted in the
3474 redirection target buffer, along with the preceding output.")
3476 (defvar comint-redirect-echo-input nil
3477 "Non-nil means echo input in the process buffer even during redirection.")
3479 (defvar comint-redirect-completed nil
3480 "Non-nil if redirection has completed in the current buffer.")
3482 (defvar comint-redirect-original-mode-line-process nil
3483 "Original mode line for redirected process.")
3485 (defvar comint-redirect-perform-sanity-check t
3486 "If non-nil, check that redirection is likely to complete successfully.
3487 More precisely, before starting a redirection, verify that the
3488 regular expression `comint-redirect-finished-regexp' that controls
3489 when to terminate it actually matches some text already in the process
3490 buffer. The idea is that this regular expression should match a prompt
3491 string, and that there ought to be at least one copy of your prompt string
3492 in the process buffer already.")
3494 (defvar comint-redirect-subvert-readonly nil
3495 "Non-nil means `comint-redirect' can insert into read-only buffers.
3496 This works by binding `inhibit-read-only' around the insertion.
3497 This is useful, for instance, for insertion into Help mode buffers.
3498 You probably want to set it locally to the output buffer.")
3500 (defvar comint-redirect-previous-input-string nil
3501 "Last redirected line of text.
3502 Allows detection of the end of the redirection in case the
3503 completion string is split between two output segments.")
3505 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3506 ;; Functions
3507 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3509 (defun comint-redirect-setup (output-buffer
3510 comint-buffer
3511 finished-regexp
3512 &optional echo-input)
3513 "Set up for output redirection.
3514 This function sets local variables that are used by `comint-redirect-filter'
3515 to perform redirection.
3517 Output from COMINT-BUFFER is redirected to OUTPUT-BUFFER, until something
3518 in the output matches FINISHED-REGEXP.
3520 If optional argument ECHO-INPUT is non-nil, output is echoed to the
3521 original Comint buffer.
3523 This function is called by `comint-redirect-send-command-to-process',
3524 and does not normally need to be invoked by the end user or programmer."
3525 (with-current-buffer comint-buffer
3527 (setq-local comint-redirect-original-mode-line-process mode-line-process)
3529 (setq-local comint-redirect-output-buffer output-buffer)
3531 (setq-local comint-redirect-finished-regexp finished-regexp)
3533 (setq-local comint-redirect-echo-input echo-input)
3535 (setq-local comint-redirect-completed nil)
3537 (setq-local comint-redirect-previous-input-string "")
3539 (setq mode-line-process
3540 (if mode-line-process
3541 (list (concat (elt mode-line-process 0) " Redirection"))
3542 (list ":%s Redirection")))))
3544 (defun comint-redirect-cleanup ()
3545 "End a Comint redirection. See `comint-redirect-send-command'."
3546 (interactive)
3547 ;; Release the last redirected string
3548 (setq comint-redirect-previous-input-string nil)
3549 ;; Restore the process filter
3550 (remove-function (process-filter (get-buffer-process (current-buffer)))
3551 #'comint-redirect-filter)
3552 ;; Restore the mode line
3553 (setq mode-line-process comint-redirect-original-mode-line-process)
3554 ;; Set the completed flag
3555 (setq comint-redirect-completed t))
3557 ;; Because the cleanup happens as a callback, it's not easy to guarantee
3558 ;; that it really occurs.
3559 (defalias 'comint-redirect-remove-redirection 'comint-redirect-cleanup)
3561 (defun comint-redirect-filter (orig-filter process input-string)
3562 "Filter function which redirects output from PROCESS to a buffer or buffers.
3563 The variable `comint-redirect-output-buffer' says which buffer(s) to
3564 place output in.
3566 INPUT-STRING is the input from the Comint process.
3568 This function runs as a process filter, and does not need to be invoked by the
3569 end user."
3570 (and process
3571 (with-current-buffer (process-buffer process)
3572 (comint-redirect-preoutput-filter input-string)
3573 ;; If we have to echo output, give it to the original filter function
3574 (and comint-redirect-echo-input
3575 orig-filter
3576 (funcall orig-filter process input-string)))))
3579 (defun comint-redirect-preoutput-filter (input-string)
3580 "Comint filter function which redirects Comint output to a buffer or buffers.
3581 The variable `comint-redirect-output-buffer' says which buffer(s) to
3582 place output in.
3584 INPUT-STRING is the input from the Comint process.
3586 This function does not need to be invoked by the end user."
3587 (let ((output-buffer-list
3588 (if (listp comint-redirect-output-buffer)
3589 comint-redirect-output-buffer
3590 (list comint-redirect-output-buffer)))
3591 (filtered-input-string input-string))
3593 ;; If there are any filter functions, give them a chance to modify
3594 ;; the string.
3595 (let ((functions comint-redirect-filter-functions))
3596 (while (and functions filtered-input-string)
3597 (if (eq (car functions) t)
3598 ;; If a local value says "use the default value too",
3599 ;; do that.
3600 (let ((functions
3601 (default-value 'comint-redirect-filter-functions)))
3602 (while (and functions filtered-input-string)
3603 (setq filtered-input-string
3604 (funcall (car functions) filtered-input-string))
3605 (setq functions (cdr functions))))
3606 (setq filtered-input-string
3607 (funcall (car functions) filtered-input-string)))
3608 (setq functions (cdr functions))))
3610 ;; Clobber `comint-redirect-finished-regexp'
3611 (or comint-redirect-insert-matching-regexp
3612 (and (string-match comint-redirect-finished-regexp filtered-input-string)
3613 (setq filtered-input-string
3614 (replace-match "" nil nil filtered-input-string))))
3616 ;; Send output to all registered buffers
3617 (save-excursion
3618 (dolist (buf output-buffer-list)
3619 ;; Set this buffer to the output buffer
3620 (set-buffer (get-buffer-create buf))
3621 ;; Go to the end of the buffer
3622 (goto-char (point-max))
3623 ;; Insert the output
3624 (let ((inhibit-read-only comint-redirect-subvert-readonly))
3625 (insert filtered-input-string))))
3627 ;; Message
3628 (and comint-redirect-verbose
3629 (message "Redirected output to buffer(s) %s" output-buffer-list))
3631 ;; If we see the prompt, tidy up
3632 ;; We'll look for the prompt in the original string, so nobody can
3633 ;; clobber it
3634 (and (string-match comint-redirect-finished-regexp
3635 (concat comint-redirect-previous-input-string
3636 input-string))
3637 (progn
3638 (and comint-redirect-verbose
3639 (message "Redirection completed"))
3640 (comint-redirect-cleanup)
3641 (run-hooks 'comint-redirect-hook)))
3642 (setq comint-redirect-previous-input-string input-string)
3644 ;; Echo input?
3645 (if comint-redirect-echo-input
3646 filtered-input-string
3647 "")))
3649 ;;;###autoload
3650 (defun comint-redirect-send-command (command output-buffer echo &optional no-display)
3651 "Send COMMAND to process in current buffer, with output to OUTPUT-BUFFER.
3652 With prefix arg ECHO, echo output in process buffer.
3654 If NO-DISPLAY is non-nil, do not show the output buffer."
3656 (let ((process (get-buffer-process (current-buffer))))
3657 (if process
3658 (comint-redirect-send-command-to-process
3659 command output-buffer (current-buffer) echo no-display)
3660 (error "No process for current buffer"))))
3662 ;;;###autoload
3663 (defun comint-redirect-send-command-to-process
3664 (command output-buffer process echo &optional no-display)
3665 "Send COMMAND to PROCESS, with output to OUTPUT-BUFFER.
3666 With prefix arg, echo output in process buffer.
3668 If NO-DISPLAY is non-nil, do not show the output buffer."
3670 (let* (;; The process buffer
3671 (process-buffer (if (processp process)
3672 (process-buffer process)
3673 process))
3674 (proc (get-buffer-process process-buffer)))
3675 ;; Change to the process buffer
3676 (with-current-buffer process-buffer
3678 ;; Make sure there's a prompt in the current process buffer
3679 (and comint-redirect-perform-sanity-check
3680 (save-excursion
3681 (goto-char (point-max))
3682 (or (re-search-backward comint-prompt-regexp nil t)
3683 (error "No prompt found or `comint-prompt-regexp' not set properly"))))
3685 ;; Set up for redirection
3686 (comint-redirect-setup
3687 output-buffer
3688 (current-buffer) ; Comint Buffer
3689 comint-prompt-regexp ; Finished Regexp
3690 echo) ; Echo input
3692 ;; Set the filter.
3693 (add-function :around (process-filter proc) #'comint-redirect-filter)
3695 ;; Send the command
3698 ;; Show the output
3699 (or no-display
3700 (display-buffer
3701 (get-buffer-create
3702 (if (listp output-buffer)
3703 (car output-buffer)
3704 output-buffer)))))))
3706 ;;;###autoload
3707 (defun comint-redirect-results-list (command regexp regexp-group)
3708 "Send COMMAND to current process.
3709 Return a list of expressions in the output which match REGEXP.
3710 REGEXP-GROUP is the regular expression group in REGEXP to use."
3711 (comint-redirect-results-list-from-process
3712 (get-buffer-process (current-buffer))
3713 command regexp regexp-group))
3715 ;;;###autoload
3716 (defun comint-redirect-results-list-from-process (process command regexp regexp-group)
3717 "Send COMMAND to PROCESS.
3718 Return a list of expressions in the output which match REGEXP.
3719 REGEXP-GROUP is the regular expression group in REGEXP to use."
3720 (let ((output-buffer " *Comint Redirect Work Buffer*")
3721 results)
3722 (with-current-buffer (get-buffer-create output-buffer)
3723 (erase-buffer)
3724 (comint-redirect-send-command-to-process command
3725 output-buffer process nil t)
3726 ;; Wait for the process to complete
3727 (set-buffer (process-buffer process))
3728 (while (and (null comint-redirect-completed)
3729 (accept-process-output process)))
3730 ;; Collect the output
3731 (set-buffer output-buffer)
3732 (goto-char (point-min))
3733 ;; Skip past the command, if it was echoed
3734 (and (looking-at command)
3735 (forward-line))
3736 (while (and (not (eobp))
3737 (re-search-forward regexp nil t))
3738 (push (buffer-substring-no-properties
3739 (match-beginning regexp-group)
3740 (match-end regexp-group))
3741 results))
3742 (nreverse results))))
3743 \f
3744 ;; Converting process modes to use comint mode
3745 ;; ===========================================================================
3746 ;; The code in the Emacs 19 distribution has all been modified to use comint
3747 ;; where needed. However, there are `third-party' packages out there that
3748 ;; still use the old shell mode. Here's a guide to conversion.
3749 ;;
3750 ;; Renaming variables
3751 ;; Most of the work is renaming variables and functions. These are the common
3752 ;; ones:
3753 ;; Local variables:
3754 ;; last-input-start comint-last-input-start
3755 ;; last-input-end comint-last-input-end
3756 ;; shell-prompt-pattern comint-prompt-regexp
3757 ;; shell-set-directory-error-hook <no equivalent>
3758 ;; Miscellaneous:
3759 ;; shell-set-directory <unnecessary>
3760 ;; shell-mode-map comint-mode-map
3761 ;; Commands:
3762 ;; shell-send-input comint-send-input
3763 ;; shell-send-eof comint-delchar-or-maybe-eof
3764 ;; kill-shell-input comint-kill-input
3765 ;; interrupt-shell-subjob comint-interrupt-subjob
3766 ;; stop-shell-subjob comint-stop-subjob
3767 ;; quit-shell-subjob comint-quit-subjob
3768 ;; kill-shell-subjob comint-kill-subjob
3769 ;; kill-output-from-shell comint-delete-output
3770 ;; show-output-from-shell comint-show-output
3771 ;; copy-last-shell-input Use comint-previous-input/comint-next-input
3772 ;;
3773 ;; SHELL-SET-DIRECTORY is gone, its functionality taken over by
3774 ;; SHELL-DIRECTORY-TRACKER, the shell mode's comint-input-filter-functions.
3775 ;; Comint mode does not provide functionality equivalent to
3776 ;; shell-set-directory-error-hook; it is gone.
3777 ;;
3778 ;; comint-last-input-start is provided for modes which want to munge
3779 ;; the buffer after input is sent, perhaps because the inferior
3780 ;; insists on echoing the input. The LAST-INPUT-START variable in
3781 ;; the old shell package was used to implement a history mechanism,
3782 ;; but you should think twice before using comint-last-input-start
3783 ;; for this; the input history ring often does the job better.
3784 ;;
3785 ;; If you are implementing some process-in-a-buffer mode, called foo-mode, do
3786 ;; *not* create the comint-mode local variables in your foo-mode function.
3787 ;; This is not modular. Instead, call comint-mode, and let *it* create the
3788 ;; necessary comint-specific local variables. Then create the
3789 ;; foo-mode-specific local variables in foo-mode. Set the buffer's keymap to
3790 ;; be foo-mode-map, and its mode to be foo-mode. Set the comint-mode hooks
3791 ;; (comint-{prompt-regexp, input-filter, input-filter-functions,
3792 ;; get-old-input) that need to be different from the defaults. Call
3793 ;; foo-mode-hook, and you're done. Don't run the comint-mode hook yourself;
3794 ;; comint-mode will take care of it. The following example, from shell.el,
3795 ;; is typical:
3796 ;;
3797 ;; (defvar shell-mode-map
3798 ;; (let ((map (make-sparse-keymap)))
3799 ;; (set-keymap-parent map comint-mode-map)
3800 ;; (define-key map "\C-c\C-f" 'shell-forward-command)
3801 ;; (define-key map "\C-c\C-b" 'shell-backward-command)
3803 ;; (define-key map "\M-?"
3804 ;; 'comint-dynamic-list-filename-completions)
3805 ;; map))
3806 ;;
3807 ;; (define-derived-mode shell-mode comint-mode "Shell"
3808 ;; "Doc."
3809 ;; (setq comint-prompt-regexp shell-prompt-pattern)
3810 ;; (setq-local shell-directory-stack nil)
3811 ;; (add-hook 'comint-input-filter-functions 'shell-directory-tracker))
3812 ;;
3813 ;;
3814 ;; Completion for comint-mode users
3815 ;;
3816 ;; For modes that use comint-mode, comint-dynamic-complete-functions is the
3817 ;; hook to add completion functions to. Functions on this list should return
3818 ;; the completion data according to the documentation of
3819 ;; `completion-at-point-functions'
3820 \f
3822 (provide 'comint)
3824 ;;; comint.el ends here