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1 ;;; comint.el --- general command interpreter in a window stuff -*- lexical-binding: t -*-
3 ;; Copyright (C) 1988, 1990, 1992-2017 Free Software Foundation, Inc.
5 ;; Author: Olin Shivers <shivers@cs.cmu.edu>
6 ;; Simon Marshall <simon@gnu.org>
7 ;; Maintainer: emacs-devel@gnu.org
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 <https://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:
188 (lambda ()
190 (define-key comint-mode-map [remap 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."
287 "Controls where to place point after matching input.
288 \\<comint-mode-map>This influences the commands \\[comint-previous-matching-input-from-input] and \\[comint-next-matching-input-from-input].
289 If `after-input', point will be positioned after the input typed
290 by the user, but before the rest of the history entry that has
291 been inserted. If `end-of-line', point will be positioned at the
292 end of the current logical (not visual) line after insertion."
300 "Controls how to scroll due to interpreter output.
301 This variable applies when point is at the end of the buffer
302 \(either because it was originally there, or because
303 `comint-move-point-for-output' said to move it there)
304 and output from the subprocess is inserted.
306 Non-nil means scroll so that the window is full of text
307 and point is on the last line. A value of nil
308 means don't do anything special--scroll normally.
310 See also the variable `comint-move-point-for-output' and the function
311 `comint-postoutput-scroll-to-bottom'.
312 This variable is buffer-local in all Comint buffers."
317 "The maximum size in lines for Comint buffers.
318 Comint buffers are truncated from the top to be no greater than this number, if
319 the function `comint-truncate-buffer' is on `comint-output-filter-functions'."
324 "Size of the input history ring in `comint-mode'."
336 "If non-nil, assume that the subprocess echoes any input.
337 If so, delete one copy of the input so that only one copy eventually
338 appears in the buffer.
340 This variable is buffer-local."
344 ;; AIX puts the name of the person being su'd to in front of the prompt.
345 ;; kinit prints a prompt like `Password for devnull@GNU.ORG: '.
346 ;; ksu prints a prompt like `Kerberos password for devnull/root@GNU.ORG: '.
347 ;; ssh-add prints a prompt like `Enter passphrase: '.
348 ;; plink prints a prompt like `Passphrase for key "root@GNU.ORG": '.
349 ;; Ubuntu's sudo prompts like `[sudo] password for user:'
350 ;; Some implementations of passwd use "Password (again)" as the 2nd prompt.
351 ;; Something called "perforce" uses "Enter password:".
352 ;; See M-x comint-testsuite--test-comint-password-prompt-regexp.
361 t)
365 ;; "[[:alpha:]]" used to be "for", which fails to match non-English.
367 "Regexp matching prompts for passwords in the inferior process.
368 This is used by `comint-watch-for-password-prompt'."
373 ;; Here are the per-interpreter hooks.
375 "Function that returns old text in Comint mode.
376 This function is called when return is typed while the point is in old
377 text. It returns the text to be submitted as process input. The
378 default is `comint-get-old-input-default', which either grabs the
379 current input field or grabs the current line and strips off leading
380 text matching `comint-prompt-regexp', depending on the value of
385 "List of functions called to perform completion.
386 Works like `completion-at-point-functions'.
387 See also `completion-at-point'.
392 "Predicate for filtering additions to input history.
393 Takes one argument, the input. If non-nil, the input may be saved on the input
397 "Abnormal hook run before input is sent to the process.
400 ;;;###autoload
401 (defvar comint-output-filter-functions '(ansi-color-process-output comint-postoutput-scroll-to-bottom comint-watch-for-password-prompt)
402 "Functions to call after output is inserted into the buffer.
403 One possible function is `comint-postoutput-scroll-to-bottom'.
404 These functions get one argument, a string containing the text as originally
405 inserted. Note that this might not be the same as the buffer contents between
406 `comint-last-output-start' and the buffer's `process-mark', if other filter
407 functions have already modified the buffer.
409 See also `comint-preoutput-filter-functions'.
411 You can use `add-hook' to add functions to this list
418 "Function to actually send to PROCESS the STRING submitted by user.
419 Usually this is just `comint-simple-send', but if your mode needs to
420 massage the input string, put a different function here.
421 `comint-simple-send' just sends the string plus a newline.
422 \(If `comint-input-sender-no-newline' is non-nil, it omits the newline.)
426 "Non-nil means go to the end of the line before sending input.
427 See `comint-send-input'."
434 ;; Note: If it is decided to purge comint-prompt-regexp from the source
435 ;; entirely, searching for uses of this variable will help to identify
436 ;; places that need attention.
438 "If non-nil, use `comint-prompt-regexp' to recognize prompts.
439 If nil, then program output and user-input are given different `field'
440 properties, which Emacs commands can use to distinguish them (in
441 particular, common movement commands such as `beginning-of-line'
442 respect field boundaries in a natural way)."
447 "Hook run upon entry to `comint-mode'.
448 This is run before the process is cranked up."
453 "Hook run each time a process is exec'd by `comint-exec'.
454 This is called after the process is cranked up. It is useful for things that
455 must be done each time a process is executed in a Comint mode buffer (e.g.,
456 `(process-kill-without-query)'). In contrast, the `comint-mode-hook' is only
457 executed once when the buffer is created."
463 ;; Keys:
474 ;; The following two are standardly bound to delete-forward-char,
475 ;; but they should never do EOF, just delete.
477 (define-key map [kp-delete] 'delete-forward-char)
478 (define-key map "\C-c " 'comint-accumulate)
479 (define-key map "\C-c\C-x" 'comint-get-next-from-history)
480 (define-key map "\C-c\C-a" 'comint-bol-or-process-mark)
481 (define-key map "\C-c\C-u" 'comint-kill-input)
482 (define-key map "\C-c\C-w" 'backward-kill-word)
483 (define-key map "\C-c\C-c" 'comint-interrupt-subjob)
484 (define-key map "\C-c\C-z" 'comint-stop-subjob)
486 (define-key map "\C-c\C-m" 'comint-copy-old-input)
487 (define-key map "\C-c\C-o" 'comint-delete-output)
488 (define-key map "\C-c\M-o" 'comint-clear-buffer)
489 (define-key map "\C-c\C-r" 'comint-show-output)
490 (define-key map "\C-c\C-e" 'comint-show-maximum-output)
491 (define-key map "\C-c\C-l" 'comint-dynamic-list-input-ring)
492 (define-key map "\C-c\C-n" 'comint-next-prompt)
493 (define-key map "\C-c\C-p" 'comint-previous-prompt)
494 (define-key map "\C-c\C-d" 'comint-send-eof)
495 (define-key map "\C-c\C-s" 'comint-write-output)
496 (define-key map "\C-c." 'comint-insert-previous-argument)
497 ;; Mouse Buttons:
498 (define-key map [mouse-2] 'comint-insert-input)
499 ;; Menu bars:
500 ;; completion:
501 (define-key map [menu-bar completion]
502 (cons "Complete" (make-sparse-keymap "Complete")))
503 (define-key map [menu-bar completion complete-expand]
504 '("Expand File Name" . comint-replace-by-expanded-filename))
505 (define-key map [menu-bar completion complete-listing]
506 '("File Completion Listing" . comint-dynamic-list-filename-completions))
507 (define-key map [menu-bar completion complete-file]
508 '("Complete File Name" . comint-dynamic-complete-filename))
509 (define-key map [menu-bar completion complete]
510 '("Complete at Point" . completion-at-point))
511 ;; Input history:
512 (define-key map [menu-bar inout]
513 (cons "In/Out" (make-sparse-keymap "In/Out")))
514 (define-key map [menu-bar inout delete-output]
515 '("Delete Current Output Group" . comint-delete-output))
516 (define-key map [menu-bar inout append-output-to-file]
517 '("Append Current Output Group to File" . comint-append-output-to-file))
518 (define-key map [menu-bar inout write-output]
519 '("Write Current Output Group to File" . comint-write-output))
520 (define-key map [menu-bar inout next-prompt]
521 '("Forward Output Group" . comint-next-prompt))
522 (define-key map [menu-bar inout previous-prompt]
523 '("Backward Output Group" . comint-previous-prompt))
524 (define-key map [menu-bar inout show-maximum-output]
525 '("Show Maximum Output" . comint-show-maximum-output))
526 (define-key map [menu-bar inout show-output]
527 '("Show Current Output Group" . comint-show-output))
528 (define-key map [menu-bar inout kill-input]
529 '("Kill Current Input" . comint-kill-input))
530 (define-key map [menu-bar inout copy-input]
531 '("Copy Old Input" . comint-copy-old-input))
532 (define-key map [menu-bar inout history-isearch-backward-regexp]
533 '("Isearch Input Regexp Backward..." . comint-history-isearch-backward-regexp))
534 (define-key map [menu-bar inout history-isearch-backward]
535 '("Isearch Input String Backward..." . comint-history-isearch-backward))
536 (define-key map [menu-bar inout forward-matching-history]
537 '("Forward Matching Input..." . comint-forward-matching-input))
538 (define-key map [menu-bar inout backward-matching-history]
539 '("Backward Matching Input..." . comint-backward-matching-input))
540 (define-key map [menu-bar inout next-matching-history]
541 '("Next Matching Input..." . comint-next-matching-input))
542 (define-key map [menu-bar inout previous-matching-history]
543 '("Previous Matching Input..." . comint-previous-matching-input))
544 (define-key map [menu-bar inout next-matching-history-from-input]
545 '("Next Matching Current Input" . comint-next-matching-input-from-input))
546 (define-key map [menu-bar inout previous-matching-history-from-input]
547 '("Previous Matching Current Input" . comint-previous-matching-input-from-input))
548 (define-key map [menu-bar inout next-history]
549 '("Next Input" . comint-next-input))
550 (define-key map [menu-bar inout previous-history]
551 '("Previous Input" . comint-previous-input))
552 (define-key map [menu-bar inout list-history]
553 '("List Input History" . comint-dynamic-list-input-ring))
554 (define-key map [menu-bar inout expand-history]
555 '("Expand History Before Point" . comint-replace-by-expanded-history))
556 ;; Signals
557 (let ((signals-map (make-sparse-keymap "Signals")))
558 (define-key map [menu-bar signals] (cons "Signals" signals-map))
559 (define-key signals-map [eof] '("EOF" . comint-send-eof))
560 (define-key signals-map [kill] '("KILL" . comint-kill-subjob))
561 (define-key signals-map [quit] '("QUIT" . comint-quit-subjob))
562 (define-key signals-map [cont] '("CONT" . comint-continue-subjob))
563 (define-key signals-map [stop] '("STOP" . comint-stop-subjob))
564 (define-key signals-map [break] '("BREAK" . comint-interrupt-subjob)))
565 ;; Put them in the menu bar:
566 (setq menu-bar-final-items (append '(completion inout signals)
567 menu-bar-final-items))
568 map))
570 ;; Fixme: Is this still relevant?
571 (defvar comint-ptyp t
572 "Non-nil if communications via pty; false if by pipe. Buffer local.
573 This is to work around a bug in Emacs process signaling.")
575 (defvar comint-input-ring nil)
576 (defvar comint-last-input-start nil)
577 (defvar comint-last-input-end nil)
578 (defvar comint-last-output-start nil)
579 (defvar comint-input-ring-index nil
580 "Index of last matched history element.")
581 (defvar comint-matching-input-from-input-string ""
582 "Input previously used to match input history.")
583 (defvar comint-save-input-ring-index nil
584 "Last input ring index which you copied.
587 (defvar comint-accum-marker nil
588 "Non-nil if you are accumulating input lines to send as input together.
591 (defvar comint-stored-incomplete-input nil
592 "Stored input for history cycling.")
594 (put 'comint-replace-by-expanded-history 'menu-enable 'comint-input-autoexpand)
595 (put 'comint-input-ring 'permanent-local t)
596 (put 'comint-input-ring-index 'permanent-local t)
597 (put 'comint-save-input-ring-index 'permanent-local t)
598 (put 'comint-input-autoexpand 'permanent-local t)
599 (put 'comint-input-filter-functions 'permanent-local t)
600 (put 'comint-output-filter-functions 'permanent-local t)
601 (put 'comint-preoutput-filter-functions 'permanent-local t)
602 (put 'comint-scroll-to-bottom-on-input 'permanent-local t)
603 (put 'comint-move-point-for-output 'permanent-local t)
604 (put 'comint-scroll-show-maximum-output 'permanent-local t)
605 (put 'comint-ptyp 'permanent-local t)
607 (put 'comint-mode 'mode-class 'special)
609 (define-derived-mode comint-mode fundamental-mode "Comint"
610 "Major mode for interacting with an inferior interpreter.
611 Interpreter name is same as buffer name, sans the asterisks.
612 Return at end of buffer sends line as input.
613 Return not at end copies rest of line to end and sends it.
614 Setting variable `comint-eol-on-send' means jump to the end of the line
615 before submitting new input.
617 This mode is customized to create major modes such as Inferior Lisp
618 mode, Shell mode, etc. This can be done by setting the hooks
619 `comint-input-filter-functions', `comint-input-filter', `comint-input-sender'
620 and `comint-get-old-input' to appropriate functions, and the variable
621 `comint-prompt-regexp' to the appropriate regular expression.
623 The mode maintains an input history of size `comint-input-ring-size'.
626 Input ring history expansion can be achieved with the commands
628 Input ring expansion is controlled by the variable `comint-input-autoexpand',
629 and addition is controlled by the variable `comint-input-ignoredups'.
631 Commands with no default key bindings include `send-invisible',
632 `completion-at-point', `comint-dynamic-list-filename-completions', and
633 `comint-magic-space'.
635 Input to, and output from, the subprocess can cause the window to scroll to
636 the end of the buffer. See variables `comint-output-filter-functions',
637 `comint-preoutput-filter-functions', `comint-scroll-to-bottom-on-input',
638 and `comint-move-point-for-output'.
641 to continue it.
645 Entry to this mode runs the hooks on `comint-mode-hook'."
646 (setq mode-line-process '(":%s"))
647 (setq-local window-point-insertion-type t)
648 (setq-local comint-last-input-start (point-min-marker))
649 (setq-local comint-last-input-end (point-min-marker))
650 (setq-local comint-last-output-start (make-marker))
651 (make-local-variable 'comint-last-prompt)
652 (make-local-variable 'comint-prompt-regexp) ; Don't set; default
653 (make-local-variable 'comint-input-ring-size) ; ...to global val.
654 (make-local-variable 'comint-input-ring)
655 (make-local-variable 'comint-input-ring-file-name)
656 (or (and (boundp 'comint-input-ring) comint-input-ring)
657 (setq comint-input-ring (make-ring comint-input-ring-size)))
658 (make-local-variable 'comint-input-ring-index)
659 (make-local-variable 'comint-save-input-ring-index)
660 (or (and (boundp 'comint-input-ring-index) comint-input-ring-index)
661 (setq comint-input-ring-index nil))
662 (or (and (boundp 'comint-save-input-ring-index) comint-save-input-ring-index)
663 (setq comint-save-input-ring-index nil))
664 (make-local-variable 'comint-matching-input-from-input-string)
665 (make-local-variable 'comint-input-autoexpand)
666 (make-local-variable 'comint-input-ignoredups)
667 (make-local-variable 'comint-delimiter-argument-list)
668 (make-local-variable 'comint-completion-fignore)
669 (make-local-variable 'comint-get-old-input)
670 (make-local-variable 'comint-input-filter)
671 (make-local-variable 'comint-input-sender)
672 (make-local-variable 'comint-eol-on-send)
673 (make-local-variable 'comint-scroll-to-bottom-on-input)
674 (make-local-variable 'comint-move-point-for-output)
675 (make-local-variable 'comint-scroll-show-maximum-output)
676 (make-local-variable 'comint-stored-incomplete-input)
677 ;; Following disabled because it seems to break the case when
678 ;; comint-scroll-show-maximum-output is nil, and no-one can remember
679 ;; what the original problem was. If there are problems with point
680 ;; not going to the end, consider re-enabling this.
681 ;; https://lists.gnu.org/archive/html/emacs-devel/2007-08/msg00827.html
682 ;;
683 ;; This makes it really work to keep point at the bottom.
684 ;; (make-local-variable 'scroll-conservatively)
685 ;; (setq scroll-conservatively 10000)
686 (add-hook 'pre-command-hook 'comint-preinput-scroll-to-bottom t t)
687 (make-local-variable 'comint-ptyp)
688 (make-local-variable 'comint-process-echoes)
689 (make-local-variable 'comint-file-name-chars)
690 (make-local-variable 'comint-file-name-quote-list)
691 ;; dir tracking on remote files
692 (setq-local comint-file-name-prefix
693 (or (file-remote-p default-directory) ""))
694 (setq-local comint-accum-marker (make-marker))
695 (setq-local font-lock-defaults '(nil t))
696 (add-hook 'change-major-mode-hook 'font-lock-defontify nil t)
697 (add-hook 'isearch-mode-hook 'comint-history-isearch-setup nil t)
698 (add-hook 'completion-at-point-functions 'comint-completion-at-point nil t)
699 ;; This behavior is not useful in comint buffers, and is annoying
700 (setq-local next-line-add-newlines nil))
702 (defun comint-check-proc (buffer)
703 "Return non-nil if there is a living process associated w/buffer BUFFER.
704 Living means the status is `open', `run', or `stop'.
705 BUFFER can be either a buffer or the name of one."
706 (let ((proc (get-buffer-process buffer)))
707 (and proc (memq (process-status proc) '(open run stop)))))
709 ;;;###autoload
710 (defun make-comint-in-buffer (name buffer program &optional startfile &rest switches)
711 "Make a Comint process NAME in BUFFER, running PROGRAM.
712 If BUFFER is nil, it defaults to NAME surrounded by `*'s.
713 If there is a running process in BUFFER, it is not restarted.
715 PROGRAM should be one of the following:
716 - a string, denoting an executable program to create via
717 `start-file-process'
718 - a cons pair of the form (HOST . SERVICE), denoting a TCP
719 connection to be opened via `open-network-stream'
720 - nil, denoting a newly-allocated pty.
722 Optional fourth arg STARTFILE is the name of a file, whose
723 contents are sent to the process as its initial input.
725 If PROGRAM is a string, any more args are arguments to PROGRAM.
727 Return the (possibly newly created) process buffer."
728 (or (fboundp 'start-file-process)
729 (error "Multi-processing is not supported for this system"))
730 (setq buffer (get-buffer-create (or buffer (concat "*" name "*"))))
731 ;; If no process, or nuked process, crank up a new one and put buffer in
732 ;; comint mode. Otherwise, leave buffer and existing process alone.
733 (unless (comint-check-proc buffer)
734 (with-current-buffer buffer
735 (unless (derived-mode-p 'comint-mode)
736 (comint-mode))) ; Install local vars, mode, keymap, ...
737 (comint-exec buffer name program startfile switches))
738 buffer)
740 ;;;###autoload
741 (defun make-comint (name program &optional startfile &rest switches)
742 "Make a Comint process NAME in a buffer, running PROGRAM.
743 The name of the buffer is made by surrounding NAME with `*'s.
744 PROGRAM should be either a string denoting an executable program to create
745 via `start-file-process', or a cons pair of the form (HOST . SERVICE) denoting
746 a TCP connection to be opened via `open-network-stream'. If there is already
747 a running process in that buffer, it is not restarted. Optional third arg
748 STARTFILE is the name of a file, whose contents are sent to the
749 process as its initial input.
751 If PROGRAM is a string, any more args are arguments to PROGRAM.
753 Returns the (possibly newly created) process buffer."
754 (apply #'make-comint-in-buffer name nil program startfile switches))
756 ;;;###autoload
757 (defun comint-run (program)
758 "Run PROGRAM in a Comint buffer and switch to it.
759 The buffer name is made by surrounding the file name of PROGRAM with `*'s.
760 The file name is used to make a symbol name, such as `comint-sh-hook', and any
761 hooks on this symbol are run in the buffer.
762 See `make-comint' and `comint-exec'."
763 (declare (interactive-only make-comint))
764 (interactive "sRun program: ")
765 (let ((name (file-name-nondirectory program)))
766 (switch-to-buffer (make-comint name program))
767 (run-hooks (intern-soft (concat "comint-" name "-hook")))))
769 (defun comint-exec (buffer name command startfile switches)
770 "Start up a process named NAME in buffer BUFFER for Comint modes.
771 Runs the given COMMAND with SWITCHES, and initial input from STARTFILE.
773 COMMAND should be one of the following:
774 - a string, denoting an executable program to create via
775 `start-file-process'
776 - a cons pair of the form (HOST . SERVICE), denoting a TCP
777 connection to be opened via `open-network-stream'
778 - nil, denoting a newly-allocated pty.
780 This function blasts any old process running in the buffer, and
781 does not set the buffer mode. You can use this to cheaply run a
782 series of processes in the same Comint buffer. The hook
783 `comint-exec-hook' is run after each exec."
784 (with-current-buffer buffer
785 (let ((proc (get-buffer-process buffer))) ; Blast any old process.
786 (if proc (delete-process proc)))
787 ;; Crank up a new process
788 (let ((proc
789 (if (consp command)
790 (open-network-stream name buffer (car command) (cdr command))
791 (comint-exec-1 name buffer command switches))))
792 (set-process-filter proc 'comint-output-filter)
793 (setq-local comint-ptyp process-connection-type) ; t if pty, nil if pipe.
794 ;; Jump to the end, and set the process mark.
795 (goto-char (point-max))
796 (set-marker (process-mark proc) (point))
797 ;; Feed it the startfile.
798 (cond (startfile
799 ;;This is guaranteed to wait long enough
800 ;;but has bad results if the comint does not prompt at all
801 ;; (while (= size (buffer-size))
802 ;; (sleep-for 1))
803 ;;I hope 1 second is enough!
804 (sleep-for 1)
805 (goto-char (point-max))
806 (insert-file-contents startfile)
807 (setq startfile (buffer-substring (point) (point-max)))
808 (delete-region (point) (point-max))
809 (comint-send-string proc startfile)))
810 (run-hooks 'comint-exec-hook)
811 buffer)))
813 ;; This auxiliary function cranks up the process for comint-exec in
814 ;; the appropriate environment.
816 (defun comint-exec-1 (name buffer command switches)
817 (let ((process-environment
818 (nconc
819 ;; If using termcap, we specify `emacs' as the terminal type
820 ;; because that lets us specify a width.
821 ;; If using terminfo, we specify `dumb' because that is
822 ;; a defined terminal type. `emacs' is not a defined terminal type
823 ;; and there is no way for us to define it here.
824 ;; Some programs that use terminfo get very confused
825 ;; if TERM is not a valid terminal type.
826 ;; ;; There is similar code in compile.el.
827 (if (and (boundp 'system-uses-terminfo) system-uses-terminfo)
828 (list "TERM=dumb" "TERMCAP="
829 (format "COLUMNS=%d" (window-width)))
830 (list "TERM=emacs"
831 (format "TERMCAP=emacs:co#%d:tc=unknown:" (window-width))))
832 (list (format "INSIDE_EMACS=%s,comint" emacs-version))
833 process-environment))
834 (default-directory
835 (if (file-accessible-directory-p default-directory)
836 default-directory
837 "/"))
838 proc decoding encoding changed)
839 (let ((exec-path (if (and command (file-name-directory command))
840 ;; If the command has slashes, make sure we
841 ;; first look relative to the current directory.
842 (cons default-directory exec-path) exec-path)))
843 (setq proc (apply 'start-file-process name buffer command switches)))
844 ;; Some file name handler cannot start a process, fe ange-ftp.
845 (unless (processp proc) (error "No process started"))
846 (let ((coding-systems (process-coding-system proc)))
847 (setq decoding (car coding-systems)
848 encoding (cdr coding-systems)))
849 ;; Even if start-file-process left the coding system for encoding data
850 ;; sent from the process undecided, we had better use the same one
851 ;; as what we use for decoding. But, we should suppress EOL
852 ;; conversion.
853 (if (and decoding (not encoding))
854 (setq encoding (coding-system-change-eol-conversion decoding 'unix)
855 changed t))
856 (if changed
857 (set-process-coding-system proc decoding encoding))
858 proc))
860 (defun comint-nonblank-p (str)
861 "Return non-nil if STR contains non-whitespace syntax."
864 (defun comint-insert-input (event)
865 "In a Comint buffer, set the current input to the previous input at point.
866 If there is no previous input at point, run the command specified
867 by the global keymap (usually `mouse-yank-at-click')."
868 (interactive "e")
869 ;; Don't set the mouse here, since it may otherwise change the behavior
870 ;; of the command on which we fallback if there's no field at point.
871 ;; (mouse-set-point event)
872 (let ((pos (posn-point (event-end event)))
873 field input)
874 (with-selected-window (posn-window (event-end event))
875 ;; If pos is at the very end of a field, the mouse-click was
876 ;; probably outside (to the right) of the field.
877 (and (< pos (field-end pos))
878 (< (field-end pos) (point-max))
879 (progn (setq field (field-at-pos pos))
880 (setq input (field-string-no-properties pos)))))
881 (if (or (null input) (null comint-accum-marker) field)
882 ;; Fall back to the global definition if (i) the selected
883 ;; buffer is not a comint buffer (which can happen if a
884 ;; non-comint window was selected and we clicked in a comint
885 ;; window), or (ii) there is no input at POS.
886 (let* ((keys (this-command-keys))
887 (last-key (and (vectorp keys) (aref keys (1- (length keys)))))
888 (fun (and last-key (lookup-key global-map (vector last-key)))))
889 (and fun (not (eq fun 'comint-insert-input))
890 (call-interactively fun)))
891 (with-selected-window (posn-window (event-end event))
892 ;; Otherwise, insert the previous input.
893 (goto-char (point-max))
894 ;; First delete any old unsent input at the end
895 (delete-region
896 (or (marker-position comint-accum-marker)
897 (process-mark (get-buffer-process (current-buffer))))
898 (point))
899 ;; Insert the input at point
900 (insert input)))))
901 \f
902 ;; Input history processing in a buffer
903 ;; ===========================================================================
904 ;; Useful input history functions, courtesy of the Ergo group.
906 ;; Eleven commands:
907 ;; comint-dynamic-list-input-ring List history in help buffer.
908 ;; comint-previous-input Previous input...
909 ;; comint-previous-matching-input ...matching a string.
910 ;; comint-previous-matching-input-from-input ... matching the current input.
911 ;; comint-next-input Next input...
912 ;; comint-next-matching-input ...matching a string.
913 ;; comint-next-matching-input-from-input ... matching the current input.
914 ;; comint-backward-matching-input Backwards input...
915 ;; comint-forward-matching-input ...matching a string.
916 ;; comint-replace-by-expanded-history Expand history at point;
917 ;; replace with expanded history.
918 ;; comint-magic-space Expand history and insert space.
919 ;;
920 ;; Three functions:
921 ;; comint-read-input-ring Read into comint-input-ring...
922 ;; comint-write-input-ring Write to comint-input-ring-file-name.
923 ;; comint-replace-by-expanded-history-before-point Workhorse function.
925 (defun comint-read-input-ring (&optional silent)
926 "Set the buffer's `comint-input-ring' from a history file.
927 The name of the file is given by the variable `comint-input-ring-file-name'.
928 The history ring is of size `comint-input-ring-size', regardless of file size.
929 If `comint-input-ring-file-name' is nil this function does nothing.
931 If the optional argument SILENT is non-nil, we say nothing about a
932 failure to read the history file.
934 This function is useful for major mode commands and mode hooks.
936 The commands stored in the history file are separated by the
937 `comint-input-ring-separator', and entries that match
938 `comint-input-history-ignore' are ignored. The most recent command
939 comes last.
941 See also `comint-input-ignoredups' and `comint-write-input-ring'."
942 (cond ((or (null comint-input-ring-file-name)
943 (equal comint-input-ring-file-name ""))
944 nil)
945 ((not (file-readable-p comint-input-ring-file-name))
946 (or silent
947 (message "Cannot read history file %s"
948 comint-input-ring-file-name)))
949 (t
950 (let* ((file comint-input-ring-file-name)
951 (count 0)
952 ;; Some users set HISTSIZE or `comint-input-ring-size'
953 ;; to huge numbers. Don't allocate a huge ring right
954 ;; away; there might not be that much history.
955 (ring-size (min 1500 comint-input-ring-size))
956 (ring (make-ring ring-size)))
957 (with-temp-buffer
958 (insert-file-contents file)
959 ;; Save restriction in case file is already visited...
960 ;; Watch for those date stamps in history files!
961 (goto-char (point-max))
962 (let (start end history)
963 (while (and (< count comint-input-ring-size)
964 (re-search-backward comint-input-ring-separator
965 nil t)
966 (setq end (match-beginning 0)))
967 (setq start
968 (if (re-search-backward comint-input-ring-separator
969 nil t)
970 (match-end 0)
971 (point-min)))
972 (setq history (buffer-substring start end))
973 (goto-char start)
974 (when (and (not (string-match comint-input-history-ignore
975 history))
976 (or (null comint-input-ignoredups)
977 (ring-empty-p ring)
978 (not (string-equal (ring-ref ring 0)
979 history))))
980 (when (= count ring-size)
981 (ring-extend ring (min (- comint-input-ring-size ring-size)
982 ring-size))
983 (setq ring-size (ring-size ring)))
984 (ring-insert-at-beginning ring history)
985 (setq count (1+ count))))))
986 (setq comint-input-ring ring
987 comint-input-ring-index nil)))))
989 (defun comint-write-input-ring ()
990 "Writes the buffer's `comint-input-ring' to a history file.
991 The name of the file is given by the variable `comint-input-ring-file-name'.
992 The original contents of the file are lost if `comint-input-ring' is not empty.
993 If `comint-input-ring-file-name' is nil this function does nothing.
995 Useful within process sentinels.
997 See also `comint-read-input-ring'."
998 (cond ((or (null comint-input-ring-file-name)
999 (equal comint-input-ring-file-name "")
1000 (null comint-input-ring) (ring-empty-p comint-input-ring))
1001 nil)
1002 ((not (file-writable-p comint-input-ring-file-name))
1003 (message "Cannot write history file %s" comint-input-ring-file-name))
1004 (t
1005 (let* ((history-buf (get-buffer-create " *Temp Input History*"))
1006 (ring comint-input-ring)
1007 (file comint-input-ring-file-name)
1008 (index (ring-length ring)))
1009 ;; Write it all out into a buffer first. Much faster, but messier,
1010 ;; than writing it one line at a time.
1011 (with-current-buffer history-buf
1012 (erase-buffer)
1013 (while (> index 0)
1014 (setq index (1- index))
1015 (insert (ring-ref ring index) comint-input-ring-separator))
1016 (write-region (buffer-string) nil file nil 'no-message)
1017 (kill-buffer nil))))))
1020 (defvar comint-dynamic-list-input-ring-window-conf)
1022 (defun comint-dynamic-list-input-ring-select ()
1023 "Choose the input history entry that point is in or next to."
1024 (interactive)
1025 (let ((buffer completion-reference-buffer)
1026 beg end completion)
1027 (if (and (not (eobp)) (get-text-property (point) 'mouse-face))
1028 (setq end (point) beg (1+ (point))))
1029 (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
1030 (setq end (1- (point)) beg (point)))
1031 (if (null beg)
1032 (error "No history entry here"))
1033 (setq beg (previous-single-property-change beg 'mouse-face))
1034 (setq end (or (next-single-property-change end 'mouse-face) (point-max)))
1035 (setq completion (buffer-substring beg end))
1036 (set-window-configuration comint-dynamic-list-input-ring-window-conf)
1037 (choose-completion-string completion buffer)))
1039 (defun comint-dynamic-list-input-ring ()
1040 "Display a list of recent inputs entered into the current buffer."
1041 (interactive)
1042 (if (or (not (ring-p comint-input-ring))
1043 (ring-empty-p comint-input-ring))
1044 (message "No history")
1045 (let ((history nil)
1046 (history-buffer " *Input History*")
1047 (conf (current-window-configuration)))
1048 ;; We have to build up a list ourselves from the ring vector.
1049 (dotimes (index (ring-length comint-input-ring))
1050 (push (ring-ref comint-input-ring index) history))
1051 ;; Show them most-recent-first.
1052 (setq history (nreverse history))
1053 ;; Change "completion" to "history reference"
1054 ;; to make the display accurate.
1055 (with-output-to-temp-buffer history-buffer
1056 (display-completion-list history)
1057 (set-buffer history-buffer)
1058 (let ((keymap (make-sparse-keymap)))
1059 (set-keymap-parent keymap (current-local-map))
1060 (define-key keymap "\C-m" 'comint-dynamic-list-input-ring-select)
1061 (use-local-map keymap))
1062 (forward-line 3)
1063 (while (search-backward "completion" nil 'move)
1064 (replace-match "history reference")))
1065 (sit-for 0)
1066 (message "Hit space to flush")
1067 (setq comint-dynamic-list-input-ring-window-conf conf)
1068 (let ((ch (read-event)))
1069 (if (eq ch ?\s)
1070 (set-window-configuration conf)
1071 (push ch unread-command-events))))))
1074 (defun comint-regexp-arg (prompt)
1075 "Return list of regexp and prefix arg using PROMPT."
1076 (let* (;; Don't clobber this.
1077 (last-command last-command)
1078 (regexp (read-from-minibuffer prompt nil nil nil
1079 'minibuffer-history-search-history)))
1080 ;; If the user didn't enter anything, nothing is added to m-h-s-h.
1081 ;; Use the previous search regexp, if there is one.
1082 (list (if (string-equal regexp "")
1083 (or (car minibuffer-history-search-history)
1084 regexp)
1085 regexp)
1086 (prefix-numeric-value current-prefix-arg))))
1088 (defun comint-search-arg (arg)
1089 ;; First make sure there is a ring and that we are after the process mark
1090 (cond ((not (comint-after-pmark-p))
1091 (user-error "Not at command line"))
1092 ((or (null comint-input-ring)
1093 (ring-empty-p comint-input-ring))
1094 (user-error "Empty input ring"))
1095 ((zerop arg)
1096 ;; arg of zero resets search from beginning, and uses arg of 1
1097 (setq comint-input-ring-index nil)
1098 1)
1099 (t
1100 arg)))
1102 (defun comint-restore-input ()
1103 "Restore unfinished input."
1104 (interactive)
1105 (when comint-input-ring-index
1106 (comint-delete-input)
1107 (when (> (length comint-stored-incomplete-input) 0)
1108 (insert comint-stored-incomplete-input)
1109 (message "Input restored"))
1110 (setq comint-input-ring-index nil)))
1112 (defun comint-search-start (arg)
1113 "Index to start a directional search, starting at `comint-input-ring-index'."
1114 (if comint-input-ring-index
1115 ;; If a search is running, offset by 1 in direction of arg
1116 (mod (+ comint-input-ring-index (if (> arg 0) 1 -1))
1117 (ring-length comint-input-ring))
1118 ;; For a new search, start from beginning or end, as appropriate
1119 (if (>= arg 0)
1120 0 ; First elt for forward search
1121 (1- (ring-length comint-input-ring))))) ; Last elt for backward search
1123 (defun comint-previous-input-string (arg)
1124 "Return the string ARG places along the input ring.
1125 Moves relative to `comint-input-ring-index'."
1126 (ring-ref comint-input-ring (if comint-input-ring-index
1127 (mod (+ arg comint-input-ring-index)
1128 (ring-length comint-input-ring))
1129 arg)))
1131 (defun comint-previous-input (arg)
1132 "Cycle backwards through input history, saving input."
1133 (interactive "*p")
1134 (if (and comint-input-ring-index
1135 (or ;; leaving the "end" of the ring
1136 (and (< arg 0) ; going down
1137 (eq comint-input-ring-index 0))
1138 (and (> arg 0) ; going up
1139 (eq comint-input-ring-index
1140 (1- (ring-length comint-input-ring)))))
1141 comint-stored-incomplete-input)
1142 (comint-restore-input)
1143 (comint-previous-matching-input "." arg)))
1145 (defun comint-next-input (arg)
1146 "Cycle forwards through input history."
1147 (interactive "*p")
1148 (comint-previous-input (- arg)))
1150 (defun comint-previous-matching-input-string (regexp arg)
1151 "Return the string matching REGEXP ARG places along the input ring.
1152 Moves relative to `comint-input-ring-index'."
1153 (let* ((pos (comint-previous-matching-input-string-position regexp arg)))
1154 (if pos (ring-ref comint-input-ring pos))))
1156 (defun comint-previous-matching-input-string-position (regexp arg &optional start)
1157 "Return the index matching REGEXP ARG places along the input ring.
1158 Moves relative to START, or `comint-input-ring-index'."
1159 (if (or (not (ring-p comint-input-ring))
1160 (ring-empty-p comint-input-ring))
1161 (user-error "No history"))
1162 (let* ((len (ring-length comint-input-ring))
1163 (motion (if (> arg 0) 1 -1))
1164 (n (mod (- (or start (comint-search-start arg)) motion) len))
1165 (tried-each-ring-item nil)
1166 (prev nil))
1167 ;; Do the whole search as many times as the argument says.
1168 (while (and (/= arg 0) (not tried-each-ring-item))
1169 ;; Step once.
1170 (setq prev n
1171 n (mod (+ n motion) len))
1172 ;; If we haven't reached a match, step some more.
1173 (while (and (< n len) (not tried-each-ring-item)
1174 (not (string-match regexp (ring-ref comint-input-ring n))))
1175 (setq n (mod (+ n motion) len)
1176 ;; If we have gone all the way around in this search.
1177 tried-each-ring-item (= n prev)))
1178 (setq arg (if (> arg 0) (1- arg) (1+ arg))))
1179 ;; Now that we know which ring element to use, if we found it, return that.
1180 (if (string-match regexp (ring-ref comint-input-ring n))
1181 n)))
1183 (defun comint-delete-input ()
1184 "Delete all input between accumulation or process mark and point."
1185 (delete-region
1186 ;; Can't use kill-region as it sets this-command
1187 (or (marker-position comint-accum-marker)
1188 (process-mark (get-buffer-process (current-buffer))))
1189 (point-max)))
1191 (defun comint-previous-matching-input (regexp n)
1192 "Search backwards through input history for match for REGEXP.
1193 \(Previous history elements are earlier commands.)
1194 With prefix argument N, search for Nth previous match.
1195 If N is negative, find the next or Nth next match."
1196 (interactive (comint-regexp-arg "Previous input matching (regexp): "))
1197 (setq n (comint-search-arg n))
1198 (let ((pos (comint-previous-matching-input-string-position regexp n)))
1199 ;; Has a match been found?
1200 (if (null pos)
1201 (user-error "Not found")
1202 ;; If leaving the edit line, save partial input
1203 (if (null comint-input-ring-index) ;not yet on ring
1204 (setq comint-stored-incomplete-input
1205 (funcall comint-get-old-input)))
1206 (setq comint-input-ring-index pos)
1207 (unless isearch-mode
1208 (let ((message-log-max nil)) ; Do not write to *Messages*.
1209 (message "History item: %d" (1+ pos))))
1210 (comint-delete-input)
1211 (insert (ring-ref comint-input-ring pos)))))
1213 (defun comint-next-matching-input (regexp n)
1214 "Search forwards through input history for match for REGEXP.
1215 \(Later history elements are more recent commands.)
1216 With prefix argument N, search for Nth following match.
1217 If N is negative, find the previous or Nth previous match."
1218 (interactive (comint-regexp-arg "Next input matching (regexp): "))
1219 (comint-previous-matching-input regexp (- n)))
1221 (defun comint-previous-matching-input-from-input (n)
1222 "Search backwards through input history for match for current input.
1223 \(Previous history elements are earlier commands.)
1224 With prefix argument N, search for Nth previous match.
1225 If N is negative, search forwards for the -Nth following match."
1226 (interactive "p")
1227 (let ((opoint (point)))
1228 (unless (memq last-command '(comint-previous-matching-input-from-input
1229 comint-next-matching-input-from-input))
1230 ;; Starting a new search
1231 (setq comint-matching-input-from-input-string
1232 (buffer-substring
1233 (or (marker-position comint-accum-marker)
1234 (process-mark (get-buffer-process (current-buffer))))
1235 (point))
1236 comint-input-ring-index nil))
1237 (comint-previous-matching-input
1238 (concat "^" (regexp-quote comint-matching-input-from-input-string))
1239 n)
1240 (when (eq comint-move-point-for-matching-input 'after-input)
1241 (goto-char opoint))))
1243 (defun comint-next-matching-input-from-input (n)
1244 "Search forwards through input history for match for current input.
1245 \(Following history elements are more recent commands.)
1246 With prefix argument N, search for Nth following match.
1247 If N is negative, search backwards for the -Nth previous match."
1248 (interactive "p")
1249 (comint-previous-matching-input-from-input (- n)))
1252 (defun comint-replace-by-expanded-history (&optional silent start)
1253 "Expand input command history references before point.
1254 Expansion is dependent on the value of `comint-input-autoexpand'.
1256 This function depends on the buffer's idea of the input history, which may not
1257 match the command interpreter's idea, assuming it has one.
1259 Assumes history syntax is like typical Un*x shells'. However, since Emacs
1260 cannot know the interpreter's idea of input line numbers, assuming it has one,
1261 it cannot expand absolute input line number references.
1263 If the optional argument SILENT is non-nil, never complain
1264 even if history reference seems erroneous.
1266 If the optional argument START is non-nil, that specifies the
1267 start of the text to scan for history references, rather
1268 than the logical beginning of line.
1270 See `comint-magic-space' and `comint-replace-by-expanded-history-before-point'.
1272 Returns t if successful."
1273 (interactive)
1274 (let ((f (comint-c-a-p-replace-by-expanded-history silent start)))
1275 (if f (funcall f))))
1277 (defun comint-c-a-p-replace-by-expanded-history (&optional silent start)
1278 "Expand input command history at point.
1279 For use on `completion-at-point-functions'."
1280 (if (and comint-input-autoexpand
1281 (if comint-use-prompt-regexp
1282 ;; Use comint-prompt-regexp
1283 (save-excursion
1284 (beginning-of-line)
1286 ;; Use input fields. User input that hasn't been entered
1287 ;; yet, at the end of the buffer, has a nil `field' property.
1288 (and (null (get-char-property (point) 'field))
1290 (catch 'dry-run
1291 (comint-replace-by-expanded-history-before-point
1292 silent start 'dry-run)))
1293 (lambda ()
1294 ;; Looks like there might be history references in the command.
1295 (let ((previous-modified-tick (buffer-modified-tick)))
1296 (comint-replace-by-expanded-history-before-point silent start)
1297 (/= previous-modified-tick (buffer-modified-tick))))))
1300 (defun comint-replace-by-expanded-history-before-point
1301 (silent &optional start dry-run)
1302 "Expand directory stack reference before point.
1303 See `comint-replace-by-expanded-history'. Returns t if successful.
1305 If the optional argument START is non-nil, that specifies the
1306 start of the text to scan for history references, rather
1307 than the logical beginning of line.
1309 If DRY-RUN is non-nil, throw to DRY-RUN before performing any
1310 actual side-effect."
1311 (save-excursion
1312 (let ((toend (- (line-end-position) (point)))
1313 (start (or start (comint-line-beginning-position))))
1314 (goto-char start)
1315 (while (progn
1316 (skip-chars-forward "^!^" (- (line-end-position) toend))
1317 (< (point) (- (line-end-position) toend)))
1318 ;; This seems a bit complex. We look for references such as !!, !-num,
1319 ;; !foo, !?foo, !{bar}, !?{bar}, ^oh, ^my^, ^god^it, ^never^ends^.
1320 ;; If that wasn't enough, the plings can be suffixed with argument
1321 ;; range specifiers.
1322 ;; Argument ranges are complex too, so we hive off the input line,
1323 ;; referenced with plings, with the range string to `comint-args'.
1324 (setq comint-input-ring-index nil)
1326 (comint-within-quotes start (point)))
1327 ;; The history is quoted, or we're in quotes.
1328 (goto-char (1+ (point))))
1330 ;; We cannot know the interpreter's idea of input line numbers.
1331 (if dry-run (throw dry-run 'message))
1332 (goto-char (match-end 0))
1333 (message "Absolute reference cannot be expanded"))
1335 ;; Just a number of args from `number' lines backward.
1336 (if dry-run (throw dry-run 'history))
1337 (let ((number (1- (string-to-number
1338 (buffer-substring (match-beginning 1)
1339 (match-end 1))))))
1340 (if (<= number (ring-length comint-input-ring))
1341 (progn
1342 (replace-match
1343 (comint-args (comint-previous-input-string number)
1344 (match-beginning 2) (match-end 2))
1345 t t)
1346 (setq comint-input-ring-index number)
1347 (message "History item: %d" (1+ number)))
1348 (goto-char (match-end 0))
1349 (message "Relative reference exceeds input history size"))))
1351 ;; Just a number of args from the previous input line.
1352 (if dry-run (throw dry-run 'expand))
1353 (replace-match (comint-args (comint-previous-input-string 0)
1354 (match-beginning 1) (match-end 1))
1355 t t)
1356 (message "History item: previous"))
1357 ((looking-at
1359 ;; Most recent input starting with or containing (possibly
1360 ;; protected) string, maybe just a number of args. Phew.
1361 (if dry-run (throw dry-run 'expand))
1362 (let* ((mb1 (match-beginning 1)) (me1 (match-end 1))
1363 (mb2 (match-beginning 2)) (me2 (match-end 2))
1364 (exp (buffer-substring (or mb2 mb1) (or me2 me1)))
1366 (pos (save-match-data
1367 (comint-previous-matching-input-string-position
1368 (concat pref (regexp-quote exp)) 1))))
1369 (if (null pos)
1370 (progn
1371 (goto-char (match-end 0))
1372 (or silent
1373 (progn (message "Not found")
1374 (ding))))
1375 (setq comint-input-ring-index pos)
1376 (replace-match
1377 (comint-args (ring-ref comint-input-ring pos)
1378 (match-beginning 4) (match-end 4))
1379 t t)
1380 (message "History item: %d" (1+ pos)))))
1382 ;; Quick substitution on the previous input line.
1383 (if dry-run (throw dry-run 'expand))
1384 (let ((old (buffer-substring (match-beginning 1) (match-end 1)))
1385 (new (buffer-substring (match-beginning 2) (match-end 2)))
1386 (pos nil))
1387 (replace-match (comint-previous-input-string 0) t t)
1388 (setq pos (point))
1389 (goto-char (match-beginning 0))
1390 (if (not (search-forward old pos t))
1391 (or silent
1392 (user-error "Not found"))
1393 (replace-match new t t)
1394 (message "History item: substituted"))))
1395 (t
1396 (forward-char 1)))))
1397 nil))
1400 (defun comint-magic-space (arg)
1401 "Expand input history references before point and insert ARG spaces.
1402 A useful command to bind to SPC. See `comint-replace-by-expanded-history'."
1403 (interactive "p")
1404 (comint-replace-by-expanded-history)
1405 (self-insert-command arg))
1406 \f
1407 ;; Isearch in comint input history
1409 (defcustom comint-history-isearch nil
1410 "Non-nil to Isearch in input history only, not in comint buffer output.
1411 If t, usual Isearch keys like `C-r' and `C-M-r' in comint mode search
1412 in the input history.
1413 If `dwim', Isearch keys search in the input history only when initial
1414 point position is at the comint command line. When starting Isearch
1415 from other parts of the comint buffer, they search in the comint buffer.
1416 If nil, Isearch operates on the whole comint buffer."
1417 :type '(choice (const :tag "Don't search in input history" nil)
1418 (const :tag "When point is on command line initially, search history" dwim)
1419 (const :tag "Always search in input history" t))
1420 :group 'comint
1421 :version "23.2")
1423 (defun comint-history-isearch-backward ()
1424 "Search for a string backward in input history using Isearch."
1425 (interactive)
1426 (let ((comint-history-isearch t))
1427 (isearch-backward nil t)))
1429 (defun comint-history-isearch-backward-regexp ()
1430 "Search for a regular expression backward in input history using Isearch."
1431 (interactive)
1432 (let ((comint-history-isearch t))
1433 (isearch-backward-regexp nil t)))
1435 (defvar-local comint-history-isearch-message-overlay nil)
1437 (defun comint-history-isearch-setup ()
1438 "Set up a comint for using Isearch to search the input history.
1439 Intended to be added to `isearch-mode-hook' in `comint-mode'."
1440 (when (or (eq comint-history-isearch t)
1441 (and (eq comint-history-isearch 'dwim)
1442 ;; Point is at command line.
1443 (comint-after-pmark-p)))
1444 (setq isearch-message-prefix-add "history ")
1445 (setq-local isearch-search-fun-function
1446 #'comint-history-isearch-search)
1447 (setq-local isearch-message-function
1448 #'comint-history-isearch-message)
1449 (setq-local isearch-wrap-function
1450 #'comint-history-isearch-wrap)
1451 (setq-local isearch-push-state-function
1452 #'comint-history-isearch-push-state)
1453 (add-hook 'isearch-mode-end-hook 'comint-history-isearch-end nil t)))
1455 (defun comint-history-isearch-end ()
1456 "Clean up the comint after terminating Isearch in comint."
1457 (if comint-history-isearch-message-overlay
1458 (delete-overlay comint-history-isearch-message-overlay))
1459 (setq isearch-message-prefix-add nil)
1460 (setq isearch-search-fun-function 'isearch-search-fun-default)
1461 (setq isearch-message-function nil)
1462 (setq isearch-wrap-function nil)
1463 (setq isearch-push-state-function nil)
1464 (remove-hook 'isearch-mode-end-hook 'comint-history-isearch-end t))
1466 (defun comint-goto-input (pos)
1467 "Put input history item of the absolute history position POS."
1468 ;; If leaving the edit line, save partial unfinished input.
1469 (if (null comint-input-ring-index)
1470 (setq comint-stored-incomplete-input
1471 (funcall comint-get-old-input)))
1472 (setq comint-input-ring-index pos)
1473 (comint-delete-input)
1474 (if (and pos (not (ring-empty-p comint-input-ring)))
1475 (insert (ring-ref comint-input-ring pos))
1476 ;; Restore partial unfinished input.
1477 (when (> (length comint-stored-incomplete-input) 0)
1478 (insert comint-stored-incomplete-input))))
1480 (defun comint-history-isearch-search ()
1481 "Return the proper search function, for Isearch in input history."
1482 (lambda (string bound noerror)
1483 (let ((search-fun
1484 ;; Use standard functions to search within comint text
1485 (isearch-search-fun-default))
1486 found)
1487 ;; Avoid lazy-highlighting matches in the comint prompt and in the
1488 ;; output when searching forward. Lazy-highlight calls this lambda
1489 ;; with the bound arg, so skip the prompt and the output.
1490 (if (and bound isearch-forward (not (comint-after-pmark-p)))
1491 (goto-char (process-mark (get-buffer-process (current-buffer)))))
1492 (or
1493 ;; 1. First try searching in the initial comint text
1494 (funcall search-fun string
1495 (if isearch-forward bound (comint-line-beginning-position))
1496 noerror)
1497 ;; 2. If the above search fails, start putting next/prev history
1498 ;; elements in the comint successively, and search the string
1499 ;; in them. Do this only when bound is nil (i.e. not while
1500 ;; lazy-highlighting search strings in the current comint text).
1501 (unless bound
1502 (condition-case nil
1503 (progn
1504 (while (not found)
1505 (cond (isearch-forward
1506 ;; Signal an error here explicitly, because
1507 ;; `comint-next-input' doesn't signal an error.
1508 (when (null comint-input-ring-index)
1509 (error "End of history; no next item"))
1510 (comint-next-input 1)
1511 (goto-char (comint-line-beginning-position)))
1512 (t
1513 ;; Signal an error here explicitly, because
1514 ;; `comint-previous-input' doesn't signal an error.
1515 (when (eq comint-input-ring-index
1516 (1- (ring-length comint-input-ring)))
1517 (error "Beginning of history; no preceding item"))
1518 (comint-previous-input 1)
1519 (goto-char (point-max))))
1520 (setq isearch-barrier (point) isearch-opoint (point))
1521 ;; After putting the next/prev history element, search
1522 ;; the string in them again, until comint-next-input
1523 ;; or comint-previous-input raises an error at the
1524 ;; beginning/end of history.
1525 (setq found (funcall search-fun string
1526 (unless isearch-forward
1527 ;; For backward search, don't search
1528 ;; in the comint prompt
1529 (comint-line-beginning-position))
1530 noerror)))
1531 ;; Return point of the new search result
1532 (point))
1533 ;; Return nil on the error "no next/preceding item"
1534 (error nil)))))))
1536 (defun comint-history-isearch-message (&optional c-q-hack ellipsis)
1537 "Display the input history search prompt.
1538 If there are no search errors, this function displays an overlay with
1539 the Isearch prompt which replaces the original comint prompt.
1540 Otherwise, it displays the standard Isearch message returned from
1541 the function `isearch-message'."
1542 (if (not (and isearch-success (not isearch-error)))
1543 ;; Use standard function `isearch-message' when not in comint prompt,
1544 ;; or search fails, or has an error (like incomplete regexp).
1545 ;; This function displays isearch message in the echo area,
1546 ;; so it's possible to see what is wrong in the search string.
1547 (isearch-message c-q-hack ellipsis)
1548 ;; Otherwise, put the overlay with the standard isearch prompt over
1549 ;; the initial comint prompt.
1550 (if (overlayp comint-history-isearch-message-overlay)
1551 (move-overlay comint-history-isearch-message-overlay
1552 (save-excursion
1553 (goto-char (comint-line-beginning-position))
1554 (forward-line 0)
1555 (point))
1556 (comint-line-beginning-position))
1557 (setq comint-history-isearch-message-overlay
1558 (make-overlay (save-excursion
1559 (goto-char (comint-line-beginning-position))
1560 (forward-line 0)
1561 (point))
1562 (comint-line-beginning-position)))
1563 (overlay-put comint-history-isearch-message-overlay 'evaporate t))
1564 (overlay-put comint-history-isearch-message-overlay
1565 'display (isearch-message-prefix ellipsis isearch-nonincremental))
1566 (if (and comint-input-ring-index (not ellipsis))
1567 ;; Display the current history index.
1568 (message "History item: %d" (1+ comint-input-ring-index))
1569 ;; Or clear a previous isearch message.
1570 (message ""))))
1572 (defun comint-history-isearch-wrap ()
1573 "Wrap the input history search when search fails.
1574 Move point to the first history element for a forward search,
1575 or to the last history element for a backward search."
1576 ;; When `comint-history-isearch-search' fails on reaching the
1577 ;; beginning/end of the history, wrap the search to the first/last
1578 ;; input history element.
1579 (if isearch-forward
1580 (comint-goto-input (1- (ring-length comint-input-ring)))
1581 (comint-goto-input nil))
1582 (setq isearch-success t)
1583 (goto-char (if isearch-forward (comint-line-beginning-position) (point-max))))
1585 (defun comint-history-isearch-push-state ()
1586 "Save a function restoring the state of input history search.
1587 Save `comint-input-ring-index' to the additional state parameter
1588 in the search status stack."
1589 (let ((index comint-input-ring-index))
1590 (lambda (cmd)
1591 (comint-history-isearch-pop-state cmd index))))
1593 (defun comint-history-isearch-pop-state (_cmd hist-pos)
1594 "Restore the input history search state.
1595 Go to the history element by the absolute history position HIST-POS."
1596 (comint-goto-input hist-pos))
1598 \f
1599 (defun comint-within-quotes (beg end)
1600 "Return t if the number of quotes between BEG and END is odd.
1601 Quotes are single and double."
1604 (or (= (mod countsq 2) 1) (= (mod countdq 2) 1))))
1606 (defun comint-how-many-region (regexp beg end)
1607 "Return number of matches for REGEXP from BEG to END."
1608 (let ((count 0))
1609 (save-excursion
1610 (save-match-data
1611 (goto-char beg)
1612 (while (re-search-forward regexp end t)
1613 (setq count (1+ count)))))
1614 count))
1616 (defun comint-args (string begin end)
1617 ;; From STRING, return the args depending on the range specified in the text
1618 ;; from BEGIN to END. If BEGIN is nil, assume all args. Ignore leading `:'.
1619 ;; Range can be x-y, x-, -y, where x/y can be [0-9], *, ^, $.
1620 (save-match-data
1621 (if (null begin)
1622 (comint-arguments string 0 nil)
1623 (let* ((range (buffer-substring
1624 (if (eq (char-after begin) ?:) (1+ begin) begin) end))
1625 (nth (cond ((string-match "^[*^]" range) 1)
1626 ((string-match "^-" range) 0)
1627 ((string-equal range "$") nil)
1628 (t (string-to-number range))))
1629 (mth (cond ((string-match "[-*$]$" range) nil)
1630 ((string-match "-" range)
1631 (string-to-number (substring range (match-end 0))))
1632 (t nth))))
1633 (comint-arguments string nth mth)))))
1635 (defun comint-delim-arg (arg)
1636 "Return a list of arguments from ARG.
1637 Break it up at the delimiters in `comint-delimiter-argument-list'.
1638 Returned list is backwards.
1640 Characters with non-nil values of the text property `literal' are
1641 assumed to have literal values (e.g., backslash-escaped
1642 characters), and are not considered to be delimiters."
1643 (if (null comint-delimiter-argument-list)
1644 (list arg)
1645 (let ((args nil)
1646 (pos 0)
1647 (len (length arg)))
1648 (while (< pos len)
1649 (let ((char (aref arg pos))
1650 (start pos))
1651 (if (and (memq char comint-delimiter-argument-list)
1652 ;; Ignore backslash-escaped characters.
1653 (not (get-text-property pos 'literal arg)))
1654 (while (and (< pos len) (eq (aref arg pos) char))
1655 (setq pos (1+ pos)))
1656 (while (and (< pos len)
1657 (not (and (memq (aref arg pos)
1658 comint-delimiter-argument-list)
1659 (not (get-text-property
1660 pos 'literal arg)))))
1661 (setq pos (1+ pos))))
1662 (setq args (cons (substring arg start pos) args))))
1663 args)))
1665 (defun comint-arguments (string nth mth)
1666 "Return from STRING the NTH to MTH arguments.
1667 NTH and/or MTH can be nil, which means the last argument.
1668 Returned arguments are separated by single spaces.
1669 We assume whitespace separates arguments, except within quotes
1670 and except for a space or tab that immediately follows a backslash.
1671 Also, a run of one or more of a single character
1672 in `comint-delimiter-argument-list' is a separate argument.
1673 Argument 0 is the command name."
1674 ;; The first line handles ordinary characters and backslash-sequences
1675 ;; (except with w32 msdos-like shells, where backslashes are valid).
1676 ;; The second matches "-quoted strings.
1677 ;; The third matches '-quoted strings.
1678 ;; The fourth matches `-quoted strings.
1679 ;; This seems to fit the syntax of BASH 2.0.
1680 (let* ((backslash-escape (not (and (fboundp 'w32-shell-dos-semantics)
1681 (w32-shell-dos-semantics))))
1682 (first (if backslash-escape
1685 (argpart (concat first
1689 (quote-subexpr (if backslash-escape 2 1))
1690 (args ()) (pos 0)
1691 (count 0)
1692 beg str quotes)
1693 ;; Build a list of all the args until we have as many as we want.
1694 (while (and (or (null mth) (<= count mth))
1695 (string-match argpart string pos))
1696 ;; Apply the `literal' text property to backslash-escaped
1697 ;; characters, so that `comint-delim-arg' won't break them up.
1698 (and backslash-escape
1699 (match-beginning 1)
1700 (put-text-property (match-beginning 1) (match-end 1)
1701 'literal t string))
1702 (if (and beg (= pos (match-beginning 0)))
1703 ;; It's contiguous, part of the same arg.
1704 (setq pos (match-end 0)
1705 quotes (or quotes (match-beginning quote-subexpr)))
1706 ;; It's a new separate arg.
1707 (if beg
1708 ;; Put the previous arg, if there was one, onto ARGS.
1709 (setq str (substring string beg pos)
1710 args (if quotes (cons str args)
1711 (nconc (comint-delim-arg str) args))))
1712 (setq count (length args))
1713 (setq quotes (match-beginning quote-subexpr))
1714 (setq beg (match-beginning 0))
1715 (setq pos (match-end 0))))
1716 (if beg
1717 (setq str (substring string beg pos)
1718 args (if quotes (cons str args)
1719 (nconc (comint-delim-arg str) args))))
1720 (setq count (length args))
1721 (let ((n (or nth (1- count)))
1722 (m (if mth (1- (- count mth)) 0)))
1723 (mapconcat
1724 (function (lambda (a) a)) (nthcdr n (nreverse (nthcdr m args))) " "))))
1725 \f
1726 ;;
1727 ;; Input processing stuff
1728 ;;
1729 (defun comint-add-to-input-history (cmd)
1730 "Add CMD to the input history.
1731 Ignore duplicates if `comint-input-ignoredups' is non-nil."
1732 (when (and (funcall comint-input-filter cmd)
1733 (or (null comint-input-ignoredups)
1734 (not (ring-p comint-input-ring))
1735 (ring-empty-p comint-input-ring)
1736 (not (string-equal (ring-ref comint-input-ring 0) cmd))))
1737 ;; If `comint-input-ring' is full, maybe grow it.
1738 (let ((size (ring-size comint-input-ring)))
1739 (and (= size (ring-length comint-input-ring))
1740 (< size comint-input-ring-size)
1741 (ring-extend comint-input-ring
1742 (min size (- comint-input-ring-size size)))))
1743 (ring-insert comint-input-ring cmd)))
1745 (defun comint-send-input (&optional no-newline artificial)
1746 "Send input to process.
1747 After the process output mark, sends all text from the process mark to
1748 point as input to the process. Before the process output mark, calls
1749 value of variable `comint-get-old-input' to retrieve old input, copies
1750 it to the process mark, and sends it.
1752 This command also sends and inserts a final newline, unless
1753 NO-NEWLINE is non-nil.
1755 Any history reference may be expanded depending on the value of the variable
1756 `comint-input-autoexpand'. The list of function names contained in the value
1757 of `comint-input-filter-functions' is called on the input before sending it.
1758 The input is entered into the input history ring, if the value of variable
1759 `comint-input-filter' returns non-nil when called on the input.
1761 If variable `comint-eol-on-send' is non-nil, then point is moved to the
1762 end of line before sending the input.
1764 After the input has been sent, if `comint-process-echoes' is non-nil,
1765 then `comint-send-input' waits to see if the process outputs a string
1766 matching the input, and if so, deletes that part of the output.
1767 If ARTIFICIAL is non-nil, it inhibits such deletion.
1768 Callers sending input not from the user should use ARTIFICIAL = t.
1770 The values of `comint-get-old-input', `comint-input-filter-functions', and
1771 `comint-input-filter' are chosen according to the command interpreter running
1772 in the buffer. E.g.,
1774 If the interpreter is the csh,
1775 `comint-get-old-input' is the default:
1776 If `comint-use-prompt-regexp' is nil, then
1777 either return the current input field, if point is on an input
1778 field, or the current line, if point is on an output field.
1779 If `comint-use-prompt-regexp' is non-nil, then
1780 return the current line with any initial string matching the
1781 regexp `comint-prompt-regexp' removed.
1784 `comint-input-filter' is the default: returns t if the input isn't all white
1785 space.
1787 If the Comint is Lucid Common Lisp,
1788 `comint-get-old-input' snarfs the sexp ending at point.
1789 `comint-input-filter-functions' does nothing.
1790 `comint-input-filter' returns nil if the input matches input-filter-regexp,
1791 which matches (1) all whitespace (2) :a, :c, etc.
1793 Similarly for Soar, Scheme, etc."
1794 (interactive)
1795 ;; If we're currently completing, stop. We're definitely done
1796 ;; completing, and by sending the input, we might cause side effects
1797 ;; that will confuse the code running in the completion
1798 ;; post-command-hook.
1799 (when completion-in-region-mode
1800 (completion-in-region-mode -1))
1801 ;; Note that the input string does not include its terminal newline.
1802 (let ((proc (get-buffer-process (current-buffer))))
1803 (if (not proc) (user-error "Current buffer has no process")
1804 (widen)
1805 (let* ((pmark (process-mark proc))
1806 (intxt (if (>= (point) (marker-position pmark))
1807 (progn (if comint-eol-on-send
1808 (if comint-use-prompt-regexp
1809 (end-of-line)
1810 (goto-char (field-end))))
1811 (buffer-substring pmark (point)))
1812 (let ((copy (funcall comint-get-old-input)))
1813 (goto-char pmark)
1814 (insert copy)
1815 copy)))
1816 (input (if (not (eq comint-input-autoexpand 'input))
1817 ;; Just whatever's already there.
1818 intxt
1819 ;; Expand and leave it visible in buffer.
1820 (comint-replace-by-expanded-history t pmark)
1821 (buffer-substring pmark (point))))
1822 (history (if (not (eq comint-input-autoexpand 'history))
1823 input
1824 ;; This is messy 'cos ultimately the original
1825 ;; functions used do insertion, rather than return
1826 ;; strings. We have to expand, then insert back.
1827 (comint-replace-by-expanded-history t pmark)
1828 (let ((copy (buffer-substring pmark (point)))
1829 (start (point)))
1830 (insert input)
1831 (delete-region pmark start)
1832 copy))))
1834 (unless no-newline
1837 (comint-add-to-input-history history)
1839 (run-hook-with-args 'comint-input-filter-functions
1840 (if no-newline input
1843 (let ((beg (marker-position pmark))
1844 (end (if no-newline (point) (1- (point)))))
1845 (with-silent-modifications
1846 (when (> end beg)
1847 (add-text-properties beg end
1848 '(front-sticky t
1849 font-lock-face comint-highlight-input))
1850 (unless comint-use-prompt-regexp
1851 ;; Give old user input a field property of `input', to
1852 ;; distinguish it from both process output and unsent
1853 ;; input. The terminating newline is put into a special
1854 ;; `boundary' field to make cursor movement between input
1855 ;; and output fields smoother.
1856 (add-text-properties
1857 beg end
1858 '(mouse-face highlight
1859 help-echo "mouse-2: insert after prompt as new input"))))
1860 (unless (or no-newline comint-use-prompt-regexp)
1861 ;; Cover the terminating newline
1862 (add-text-properties end (1+ end)
1863 '(rear-nonsticky t
1864 field boundary
1865 inhibit-line-move-field-capture t)))))
1867 (comint-snapshot-last-prompt)
1869 (setq comint-save-input-ring-index comint-input-ring-index)
1870 (setq comint-input-ring-index nil)
1871 ;; Update the markers before we send the input
1872 ;; in case we get output amidst sending the input.
1873 (set-marker comint-last-input-start pmark)
1874 (set-marker comint-last-input-end (point))
1875 (set-marker (process-mark proc) (point))
1876 ;; clear the "accumulation" marker
1877 (set-marker comint-accum-marker nil)
1878 (let ((comint-input-sender-no-newline no-newline))
1879 (funcall comint-input-sender proc input))
1881 ;; Optionally delete echoed input (after checking it).
1882 (when (and comint-process-echoes (not artificial))
1883 (let ((echo-len (- comint-last-input-end
1884 comint-last-input-start)))
1885 ;; Wait for all input to be echoed:
1886 (while (and (> (+ comint-last-input-end echo-len)
1887 (point-max))
1888 (accept-process-output proc)
1889 (zerop
1890 (compare-buffer-substrings
1891 nil comint-last-input-start
1892 (- (point-max) echo-len)
1893 ;; Above difference is equivalent to
1894 ;; (+ comint-last-input-start
1895 ;; (- (point-max) comint-last-input-end))
1896 nil comint-last-input-end (point-max)))))
1897 (if (and
1898 (<= (+ comint-last-input-end echo-len)
1899 (point-max))
1900 (zerop
1901 (compare-buffer-substrings
1902 nil comint-last-input-start comint-last-input-end
1903 nil comint-last-input-end
1904 (+ comint-last-input-end echo-len))))
1905 ;; Certain parts of the text to be deleted may have
1906 ;; been mistaken for prompts. We have to prevent
1907 ;; problems when `comint-prompt-read-only' is non-nil.
1908 (let ((inhibit-read-only t))
1909 (delete-region comint-last-input-end
1910 (+ comint-last-input-end echo-len))
1911 (when comint-prompt-read-only
1912 (save-excursion
1913 (goto-char comint-last-input-end)
1914 (comint-update-fence)))))))
1916 ;; This used to call comint-output-filter-functions,
1917 ;; but that scrolled the buffer in undesirable ways.
1918 (run-hook-with-args 'comint-output-filter-functions "")))))
1920 (defvar comint-preoutput-filter-functions nil
1921 "List of functions to call before inserting Comint output into the buffer.
1922 Each function gets one argument, a string containing the text received
1923 from the subprocess. It should return the string to insert, perhaps
1924 the same string that was received, or perhaps a modified or transformed
1925 string.
1927 The functions on the list are called sequentially, and each one is
1928 given the string returned by the previous one. The string returned by
1929 the last function is the text that is actually inserted in the
1930 redirection buffer.
1932 You can use `add-hook' to add functions to this list
1933 either globally or locally.")
1935 (defvar comint-inhibit-carriage-motion nil
1936 "If nil, Comint will interpret `carriage control' characters in output.
1937 See `comint-carriage-motion' for details.")
1939 (defvar comint-last-prompt nil
1940 "Markers pointing to the last prompt.
1941 If non-nil, a cons cell containing markers. The car points to
1942 the start, the cdr to the end of the last prompt recognized.")
1944 (defun comint-snapshot-last-prompt ()
1945 "Snapshot the current `comint-last-prompt'.
1946 Freezes the `font-lock-face' text property in place."
1947 (when comint-last-prompt
1948 (with-silent-modifications
1949 (font-lock-prepend-text-property
1950 (car comint-last-prompt)
1951 (cdr comint-last-prompt)
1952 'font-lock-face 'comint-highlight-prompt))
1953 ;; Reset comint-last-prompt so later on comint-output-filter does
1954 ;; not remove the font-lock-face text property of the previous
1955 ;; (this) prompt.
1956 (setq comint-last-prompt nil)))
1958 (defun comint-carriage-motion (start end)
1959 "Interpret carriage control characters in the region from START to END.
1960 Translate carriage return/linefeed sequences to linefeeds.
1961 Make single carriage returns delete to the beginning of the line.
1962 Make backspaces delete the previous character."
1963 (save-excursion
1965 ;; calling save-match-data and save-restriction. But, such a
1966 ;; check is not necessary now because we don't use regexp search
1967 ;; nor save-restriction. Note that the buffer is already widen,
1968 ;; and calling narrow-to-region and widen are not that heavy.
1969 (goto-char start)
1970 (let* ((inhibit-field-text-motion t)
1971 (inhibit-read-only t)
1972 (lbeg (line-beginning-position))
1973 delete-end ch)
1974 ;; If the preceding text is marked as "must-overwrite", record
1975 ;; it in delete-end.
1976 (when (and (> start (point-min))
1977 (get-text-property (1- start) 'comint-must-overwrite))
1978 (setq delete-end (point-marker))
1979 (remove-text-properties lbeg start '(comint-must-overwrite nil)))
1980 (narrow-to-region lbeg end)
1981 ;; Handle BS, LF, and CR specially.
1983 (setq ch (following-char))
1985 (delete-char 1)
1986 (if (> (point) lbeg)
1987 (delete-char -1)))
1989 (when delete-end ; CH = LF
1990 (if (< delete-end (point))
1991 (delete-region lbeg delete-end))
1992 (set-marker delete-end nil)
1993 (setq delete-end nil))
1994 (forward-char 1)
1995 (setq lbeg (point)))
1996 (t ; CH = CR
1997 (delete-char 1)
1998 (if delete-end
1999 (when (< delete-end (point))
2000 (delete-region lbeg delete-end)
2001 (move-marker delete-end (point)))
2002 (setq delete-end (point-marker))))))
2003 (when delete-end
2004 (if (< delete-end (point))
2005 ;; As there's a text after the last CR, make the current
2006 ;; line contain only that text.
2007 (delete-region lbeg delete-end)
2008 ;; Remember that the process output ends by CR, and thus we
2009 ;; must overwrite the contents of the current line next
2010 ;; time.
2011 (put-text-property lbeg delete-end 'comint-must-overwrite t))
2012 (set-marker delete-end nil))
2013 (widen))))
2015 ;; The purpose of using this filter for comint processes
2016 ;; is to keep comint-last-input-end from moving forward
2017 ;; when output is inserted.
2018 (defun comint-output-filter (process string)
2019 (let ((oprocbuf (process-buffer process)))
2020 ;; First check for killed buffer or no input.
2021 (when (and string oprocbuf (buffer-name oprocbuf))
2022 (with-current-buffer oprocbuf
2023 ;; Run preoutput filters
2024 (let ((functions comint-preoutput-filter-functions))
2025 (while (and functions string)
2026 (if (eq (car functions) t)
2027 (let ((functions
2028 (default-value 'comint-preoutput-filter-functions)))
2029 (while (and functions string)
2030 (setq string (funcall (car functions) string))
2031 (setq functions (cdr functions))))
2032 (setq string (funcall (car functions) string)))
2033 (setq functions (cdr functions))))
2035 ;; Insert STRING
2036 (let ((inhibit-read-only t)
2037 ;; The point should float after any insertion we do.
2038 (saved-point (copy-marker (point) t)))
2040 ;; We temporarily remove any buffer narrowing, in case the
2041 ;; process mark is outside of the restriction
2042 (save-restriction
2043 (widen)
2045 (goto-char (process-mark process))
2046 (set-marker comint-last-output-start (point))
2048 ;; Try to skip repeated prompts, which can occur as a result of
2049 ;; commands sent without inserting them in the buffer.
2050 (let ((bol (save-excursion (forward-line 0) (point)))) ;No fields.
2051 (when (and (not (bolp))
2052 (looking-back comint-prompt-regexp bol))
2053 (let* ((prompt (buffer-substring bol (point)))
2055 (while (string-match prompt-re string)
2056 (setq string (substring string (match-end 0)))))))
2059 string)
2062 ;; insert-before-markers is a bad thing. XXX
2063 ;; Luckily we don't have to use it any more, we use
2064 ;; window-point-insertion-type instead.
2065 (insert string)
2067 ;; Advance process-mark
2068 (set-marker (process-mark process) (point))
2070 (unless comint-inhibit-carriage-motion
2071 ;; Interpret any carriage motion characters (newline, backspace)
2072 (comint-carriage-motion comint-last-output-start (point)))
2074 ;; Run these hooks with point where the user had it.
2075 (goto-char saved-point)
2076 (run-hook-with-args 'comint-output-filter-functions string)
2077 (set-marker saved-point (point))
2079 (goto-char (process-mark process)) ; In case a filter moved it.
2081 (unless comint-use-prompt-regexp
2082 (with-silent-modifications
2083 (add-text-properties comint-last-output-start (point)
2084 '(front-sticky
2085 (field inhibit-line-move-field-capture)
2086 rear-nonsticky t
2087 field output
2088 inhibit-line-move-field-capture t))))
2090 ;; Highlight the prompt, where we define `prompt' to mean
2091 ;; the most recent output that doesn't end with a newline.
2092 (let ((prompt-start (save-excursion (forward-line 0) (point)))
2093 (inhibit-read-only t))
2094 (when comint-prompt-read-only
2095 (with-silent-modifications
2096 (or (= (point-min) prompt-start)
2097 (get-text-property (1- prompt-start) 'read-only)
2098 (put-text-property (1- prompt-start)
2099 prompt-start 'read-only 'fence))
2100 (add-text-properties prompt-start (point)
2101 '(read-only t front-sticky (read-only)))))
2102 (when comint-last-prompt
2103 ;; There might be some keywords here waiting for
2104 ;; fontification, so no `with-silent-modifications'.
2105 (font-lock--remove-face-from-text-property
2106 (car comint-last-prompt)
2107 (cdr comint-last-prompt)
2108 'font-lock-face
2109 'comint-highlight-prompt))
2110 (setq comint-last-prompt
2111 (cons (copy-marker prompt-start) (point-marker)))
2112 (font-lock-prepend-text-property prompt-start (point)
2113 'font-lock-face
2114 'comint-highlight-prompt)
2115 (add-text-properties prompt-start (point) '(rear-nonsticky t)))
2116 (goto-char saved-point)))))))
2118 (defun comint-preinput-scroll-to-bottom ()
2119 "Go to the end of buffer in all windows showing it.
2120 Movement occurs if point in the selected window is not after the process mark,
2121 and `this-command' is an insertion command. Insertion commands recognized
2122 are `self-insert-command', `comint-magic-space', `yank', and `hilit-yank'.
2123 Depends on the value of `comint-scroll-to-bottom-on-input'.
2125 This function should be a pre-command hook."
2126 (if (and comint-scroll-to-bottom-on-input
2127 (memq this-command '(self-insert-command comint-magic-space yank
2128 hilit-yank)))
2129 (let* ((current (current-buffer))
2130 (process (get-buffer-process current))
2131 (scroll comint-scroll-to-bottom-on-input))
2132 (if (and process (< (point) (process-mark process)))
2133 (if (eq scroll 'this)
2134 (goto-char (point-max))
2135 (walk-windows
2136 (lambda (window)
2137 (if (and (eq (window-buffer window) current)
2138 (or (eq scroll t) (eq scroll 'all)))
2139 (with-selected-window window
2140 (goto-char (point-max)))))
2141 nil t))))))
2143 (defvar follow-mode)
2144 (declare-function follow-comint-scroll-to-bottom "follow" (&optional window))
2146 (defun comint-postoutput-scroll-to-bottom (_string)
2147 "Go to the end of buffer in some or all windows showing it.
2148 Do not scroll if the current line is the last line in the buffer.
2149 Depends on the value of `comint-move-point-for-output' and
2150 `comint-scroll-show-maximum-output'.
2152 This function should be in the list `comint-output-filter-functions'."
2153 (let* ((current (current-buffer))
2154 (process (get-buffer-process current)))
2155 (unwind-protect
2156 (cond
2157 ((null process))
2158 ((bound-and-true-p follow-mode)
2159 (follow-comint-scroll-to-bottom))
2160 (t
2161 (dolist (w (get-buffer-window-list current nil t))
2162 (comint-adjust-window-point w process)
2163 ;; Optionally scroll to the bottom of the window.
2164 (and comint-scroll-show-maximum-output
2165 (eq (window-point w) (point-max))
2166 (with-selected-window w
2167 (recenter (- -1 scroll-margin)))))))
2168 (set-buffer current))))
2171 (defun comint-adjust-window-point (window process)
2172 "Move point in WINDOW based on Comint settings.
2173 For point adjustment use the process-mark of PROCESS."
2174 (and (< (window-point window) (process-mark process))
2175 (or (memq comint-move-point-for-output '(t all))
2176 ;; Maybe user wants point to jump to end.
2177 (eq comint-move-point-for-output
2178 (if (eq (selected-window) window) 'this 'others))
2179 ;; If point was at the end, keep it at end.
2180 (and (marker-position comint-last-output-start)
2181 (>= (window-point window) comint-last-output-start)))
2182 (set-window-point window (process-mark process))))
2185 ;; this function is nowhere used
2186 (defun comint-adjust-point (selected)
2187 "Move point in the selected window based on Comint settings.
2188 SELECTED is the window that was originally selected."
2189 (let ((process (get-buffer-process (current-buffer))))
2190 (and (< (point) (process-mark process))
2191 (or (memq comint-move-point-for-output '(t all))
2192 ;; Maybe user wants point to jump to end.
2193 (eq comint-move-point-for-output
2194 (if (eq (selected-window) selected) 'this 'others))
2195 ;; If point was at the end, keep it at end.
2196 (and (marker-position comint-last-output-start)
2197 (>= (point) comint-last-output-start)))
2198 (goto-char (process-mark process)))))
2200 (defun comint-truncate-buffer (&optional _string)
2201 "Truncate the buffer to `comint-buffer-maximum-size'.
2202 This function could be on `comint-output-filter-functions' or bound to a key."
2203 (interactive)
2204 (save-excursion
2205 (goto-char (process-mark (get-buffer-process (current-buffer))))
2206 (forward-line (- comint-buffer-maximum-size))
2207 (beginning-of-line)
2208 (let ((inhibit-read-only t))
2209 (delete-region (point-min) (point)))))
2211 (defun comint-strip-ctrl-m (&optional _string)
2212 "Strip trailing `^M' characters from the current output group.
2213 This function could be on `comint-output-filter-functions' or bound to a key."
2214 (interactive)
2215 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2216 (save-excursion
2217 (condition-case nil
2218 (goto-char
2219 (if (called-interactively-p 'interactive)
2220 comint-last-input-end comint-last-output-start))
2221 (error nil))
2223 (replace-match "" t t)))))
2224 (defalias 'shell-strip-ctrl-m 'comint-strip-ctrl-m)
2226 (defun comint-show-maximum-output ()
2227 "Put the end of the buffer at the bottom of the window."
2228 (interactive)
2229 (goto-char (point-max))
2230 (recenter (- -1 scroll-margin)))
2232 (defun comint-get-old-input-default ()
2233 "Default for `comint-get-old-input'.
2234 If `comint-use-prompt-regexp' is nil, then either
2235 return the current input field, if point is on an input field, or the
2236 current line, if point is on an output field.
2237 If `comint-use-prompt-regexp' is non-nil, then return
2238 the current line with any initial string matching the regexp
2239 `comint-prompt-regexp' removed."
2240 (let (bof)
2241 (if (and (not comint-use-prompt-regexp)
2242 ;; Make sure we're in an input rather than output field.
2243 (null (get-char-property (setq bof (field-beginning)) 'field)))
2244 (field-string-no-properties bof)
2245 (comint-bol)
2246 (buffer-substring-no-properties (point)
2247 (if comint-use-prompt-regexp
2248 (line-end-position)
2249 (field-end))))))
2251 (defun comint-copy-old-input ()
2252 "Insert after prompt old input at point as new input to be edited.
2253 Calls `comint-get-old-input' to get old input."
2254 (interactive)
2255 (let ((input (funcall comint-get-old-input))
2256 (process (get-buffer-process (current-buffer))))
2257 (if (not process)
2258 (user-error "Current buffer has no process")
2259 (goto-char (process-mark process))
2260 (insert input))))
2262 (defun comint-skip-prompt ()
2263 "Skip past the text matching regexp `comint-prompt-regexp'.
2264 If this takes us past the end of the current line, don't skip at all."
2265 (if (and (looking-at comint-prompt-regexp)
2266 (<= (match-end 0) (line-end-position)))
2267 (goto-char (match-end 0))))
2269 (defun comint-after-pmark-p ()
2270 "Return t if point is after the process output marker."
2271 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2272 (<= (marker-position pmark) (point))))
2274 (defun comint-simple-send (proc string)
2275 "Default function for sending to PROC input STRING.
2276 This just sends STRING plus a newline. To override this,
2277 set the hook `comint-input-sender'."
2278 (let ((send-string
2279 (if comint-input-sender-no-newline
2280 string
2281 ;; Sending as two separate strings does not work
2284 (comint-send-string proc send-string))
2285 (if (and comint-input-sender-no-newline
2286 (not (string-equal string "")))
2287 (process-send-eof)))
2289 (defun comint-line-beginning-position ()
2290 "Return the buffer position of the beginning of the line, after any prompt.
2291 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done by
2292 skipping text matching the regular expression `comint-prompt-regexp',
2293 a buffer local variable."
2294 (if comint-use-prompt-regexp
2295 ;; Use comint-prompt-regexp
2296 (save-excursion
2297 (beginning-of-line)
2298 (comint-skip-prompt)
2299 (point))
2300 ;; Use input fields. Note that, unlike the behavior of
2301 ;; `line-beginning-position' inside a field, this function will
2302 ;; return the position of the end of a prompt, even if the point is
2303 ;; already inside the prompt. In order to do this, it assumes that
2304 ;; if there are two fields on a line, then the first one is the
2305 ;; prompt, and the second one is an input field, and is front-sticky
2306 ;; (as input fields should be).
2307 (constrain-to-field (if (eq (field-at-pos (point)) 'output)
2308 (line-beginning-position)
2309 (field-beginning))
2310 (line-end-position))))
2312 (defun comint-bol (&optional arg)
2313 "Go to the beginning of line, then skip past the prompt, if any.
2315 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done
2316 by skipping text matching the regular expression `comint-prompt-regexp',
2317 a buffer local variable."
2318 (interactive "P")
2319 (if arg
2320 ;; Unlike `beginning-of-line', forward-line ignores field boundaries
2321 (forward-line 0)
2322 (goto-char (comint-line-beginning-position))))
2324 ;; For compatibility.
2325 (defun comint-read-noecho (prompt &optional _ignore)
2326 (read-passwd prompt))
2328 ;; These three functions are for entering text you don't want echoed or
2329 ;; saved -- typically passwords to ftp, telnet, or somesuch.
2330 ;; Just enter m-x send-invisible and type in your line.
2332 (defun send-invisible (&optional prompt)
2333 "Read a string without echoing.
2334 Then send it to the process running in the current buffer.
2335 The string is sent using `comint-input-sender'.
2336 Security bug: your string can still be temporarily recovered with
2338 (interactive "P") ; Defeat snooping via C-x ESC ESC
2339 (let ((proc (get-buffer-process (current-buffer)))
2340 (prefix
2341 (if (eq (window-buffer) (current-buffer))
2342 ""
2343 (format "(In buffer %s) "
2344 (current-buffer)))))
2345 (if proc
2346 (let ((str (read-passwd (concat prefix
2347 (or prompt "Non-echoed text: ")))))
2348 (if (stringp str)
2349 (progn
2350 (comint-snapshot-last-prompt)
2351 (funcall comint-input-sender proc str))
2352 (message "Warning: text will be echoed")))
2353 (error "Buffer %s has no process" (current-buffer)))))
2355 (defun comint-watch-for-password-prompt (string)
2356 "Prompt in the minibuffer for password and send without echoing.
2357 This function uses `send-invisible' to read and send a password to the buffer's
2358 process if STRING contains a password prompt defined by
2359 `comint-password-prompt-regexp'.
2361 This function could be in the list `comint-output-filter-functions'."
2362 (when (let ((case-fold-search t))
2363 (string-match comint-password-prompt-regexp string))
2365 (setq string (replace-match "" t t string)))
2366 (send-invisible string)))
2367 \f
2368 ;; Low-level process communication
2370 (defun comint-send-string (process string)
2371 "Like `process-send-string', but also does extra bookkeeping for Comint mode."
2372 (if process
2373 (with-current-buffer (if (processp process)
2374 (process-buffer process)
2375 (get-buffer process))
2376 (comint-snapshot-last-prompt))
2377 (comint-snapshot-last-prompt))
2378 (process-send-string process string))
2380 (defun comint-send-region (process start end)
2381 "Like `process-send-region', but also does extra bookkeeping for Comint mode."
2382 (if process
2383 (with-current-buffer (if (processp process)
2384 (process-buffer process)
2385 (get-buffer process))
2386 (comint-snapshot-last-prompt))
2387 (comint-snapshot-last-prompt))
2388 (process-send-region process start end))
2390 \f
2391 ;; Random input hackage
2393 (defun comint-delete-output ()
2394 "Delete all output from interpreter since last input.
2395 Does not delete the prompt."
2396 (interactive)
2397 (let ((proc (get-buffer-process (current-buffer)))
2398 (replacement nil)
2399 (inhibit-read-only t))
2400 (save-excursion
2401 (let ((pmark (progn (goto-char (process-mark proc))
2402 (forward-line 0)
2403 (point-marker))))
2404 (delete-region comint-last-input-end pmark)
2405 (goto-char (process-mark proc))
2407 (buffer-substring pmark (point))))
2408 (delete-region pmark (point))))
2409 ;; Output message and put back prompt
2410 (comint-output-filter proc replacement)))
2412 (defun comint-write-output (filename &optional append mustbenew)
2413 "Write output from interpreter since last input to FILENAME.
2414 Any prompt at the end of the output is not written.
2416 If the optional argument APPEND (the prefix argument when interactive)
2417 is non-nil, the output is appended to the file instead.
2419 If the optional argument MUSTBENEW is non-nil, check for an existing
2420 file with the same name. If MUSTBENEW is `excl', that means to get an
2421 error if the file already exists; never overwrite. If MUSTBENEW is
2422 neither nil nor `excl', that means ask for confirmation before
2423 overwriting, but do go ahead and overwrite the file if the user
2424 confirms. When interactive, MUSTBENEW is nil when appending, and t
2425 otherwise."
2426 (interactive
2427 (list (read-file-name
2428 (if current-prefix-arg
2429 "Append output to file: "
2430 "Write output to file: "))
2431 current-prefix-arg
2432 (not current-prefix-arg)))
2433 (save-excursion
2434 (goto-char (process-mark (get-buffer-process (current-buffer))))
2435 (forward-line 0)
2436 (write-region comint-last-input-end (point) filename
2437 append nil nil mustbenew)))
2439 ;; This function exists for the benefit of the menu; from the keyboard,
2440 ;; users can just use `comint-write-output' with a prefix arg.
2441 (defun comint-append-output-to-file (filename)
2442 "Append output from interpreter since last input to FILENAME.
2443 Any prompt at the end of the output is not written."
2444 (interactive "fAppend output to file: ")
2445 (comint-write-output filename t))
2447 (defun comint-show-output ()
2448 "Display start of this batch of interpreter output at top of window.
2449 Sets mark to the value of point when this command is run."
2450 (interactive)
2451 (push-mark)
2452 (let ((pos (or (marker-position comint-last-input-end) (point-max))))
2453 (cond (comint-use-prompt-regexp
2454 (goto-char pos)
2455 (beginning-of-line 0)
2456 (set-window-start (selected-window) (point))
2457 (comint-skip-prompt))
2458 (t
2459 (goto-char (field-beginning pos))
2460 (set-window-start (selected-window) (point))))))
2462 (defun comint-clear-buffer ()
2463 "Clear the comint buffer."
2464 (interactive)
2465 (let ((comint-buffer-maximum-size 0))
2466 (comint-truncate-buffer)))
2468 (defun comint-interrupt-subjob ()
2469 "Interrupt the current subjob.
2470 This command also kills the pending input
2471 between the process mark and point."
2472 (interactive)
2473 (comint-skip-input)
2474 (interrupt-process nil comint-ptyp)
2476 )
2478 (defun comint-kill-subjob ()
2479 "Send kill signal to the current subjob.
2480 This command also kills the pending input
2481 between the process mark and point."
2482 (interactive)
2483 (comint-skip-input)
2484 (kill-process nil comint-ptyp))
2486 (defun comint-quit-subjob ()
2487 "Send quit signal to the current subjob.
2488 This command also kills the pending input
2489 between the process mark and point."
2490 (interactive)
2491 (comint-skip-input)
2492 (quit-process nil comint-ptyp))
2494 (defun comint-stop-subjob ()
2495 "Stop the current subjob.
2496 This command also kills the pending input
2497 between the process mark and point.
2499 WARNING: if there is no current subjob, you can end up suspending
2500 the top-level process running in the buffer. If you accidentally do
2502 is not a problem with most shells, since they ignore this signal.)"
2503 (interactive)
2504 (comint-skip-input)
2505 (stop-process nil comint-ptyp))
2507 (defun comint-continue-subjob ()
2508 "Send CONT signal to process buffer's process group.
2509 Useful if you accidentally suspend the top-level process."
2510 (interactive)
2511 (continue-process nil comint-ptyp))
2513 (defun comint-skip-input ()
2514 "Skip all pending input, from last stuff output by interpreter to point.
2515 This means mark it as if it had been sent as input, without sending it."
2516 (let ((comint-input-sender 'ignore)
2517 (comint-input-filter-functions nil))
2518 (comint-send-input t t))
2519 (end-of-line)
2520 (let ((pos (point))
2521 (marker (process-mark (get-buffer-process (current-buffer)))))
2522 (insert " " (key-description (this-command-keys)))
2523 (if (= marker pos)
2524 (set-marker marker (point)))))
2526 (defun comint-kill-input ()
2527 "Kill all text from last stuff output by interpreter to point."
2528 (interactive)
2529 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2530 (if (> (point) (marker-position pmark))
2531 (kill-region pmark (point)))))
2533 (defun comint-delchar-or-maybe-eof (arg)
2534 "Delete ARG characters forward or send an EOF to subprocess.
2535 Sends an EOF only if point is at the end of the buffer and there is no input."
2536 (interactive "p")
2537 (let ((proc (get-buffer-process (current-buffer))))
2538 (if (and (eobp) proc (= (point) (marker-position (process-mark proc))))
2539 (comint-send-eof)
2540 (delete-char arg))))
2542 (defun comint-send-eof ()
2543 "Send an EOF to the current buffer's process."
2544 (interactive)
2545 (comint-send-input t t)
2546 (process-send-eof))
2549 (defun comint-backward-matching-input (regexp n)
2550 "Search backward through buffer for input fields that match REGEXP.
2551 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2552 by lines that match `comint-prompt-regexp'.
2554 With prefix argument N, search for Nth previous match.
2555 If N is negative, find the next or Nth next match."
2556 (interactive (comint-regexp-arg "Backward input matching (regexp): "))
2557 (if comint-use-prompt-regexp
2558 ;; Use comint-prompt-regexp
2559 (let* ((re (concat comint-prompt-regexp ".*" regexp))
2560 (pos (save-excursion (end-of-line (if (> n 0) 0 1))
2561 (if (re-search-backward re nil t n)
2562 (point)))))
2563 (if (null pos)
2564 (progn (message "Not found")
2565 (ding))
2566 (goto-char pos)
2567 (comint-bol nil)))
2568 ;; Use input fields
2569 (let* ((dir (if (< n 0) -1 1))
2570 (pos
2571 (save-excursion
2572 (while (/= n 0)
2573 (unless (re-search-backward regexp nil t dir)
2574 (user-error "Not found"))
2575 (unless (get-char-property (point) 'field)
2576 (setq n (- n dir))))
2577 (field-beginning))))
2578 (goto-char pos))))
2581 (defun comint-forward-matching-input (regexp n)
2582 "Search forward through buffer for input fields that match REGEXP.
2583 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2584 by lines that match `comint-prompt-regexp'.
2586 With prefix argument N, search for Nth following match.
2587 If N is negative, find the previous or Nth previous match."
2588 (interactive (comint-regexp-arg "Forward input matching (regexp): "))
2589 (comint-backward-matching-input regexp (- n)))
2592 (defun comint-next-prompt (n)
2593 "Move to end of Nth next prompt in the buffer.
2594 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2595 the Nth next `input' field, otherwise, it means the Nth occurrence of
2596 text matching `comint-prompt-regexp'."
2597 (interactive "p")
2598 (if comint-use-prompt-regexp
2599 ;; Use comint-prompt-regexp
2600 (let ((paragraph-start comint-prompt-regexp))
2601 (end-of-line (if (> n 0) 1 0))
2602 (forward-paragraph n)
2603 (comint-skip-prompt))
2604 ;; Use input fields
2605 (let ((pos (point))
2606 (input-pos nil)
2607 prev-pos)
2608 (while (/= n 0)
2609 (setq prev-pos pos)
2610 (setq pos
2611 (if (> n 0)
2612 (next-single-char-property-change pos 'field)
2613 (previous-single-char-property-change pos 'field)))
2614 (cond ((= pos prev-pos)
2615 ;; Ran off the end of the buffer.
2616 (when (> n 0)
2617 ;; There's always an input field at the end of the
2618 ;; buffer, but it has a `field' property of nil.
2619 (setq input-pos (point-max)))
2620 ;; stop iterating
2621 (setq n 0))
2622 ((null (get-char-property pos 'field))
2623 (setq n (if (< n 0) (1+ n) (1- n)))
2624 (setq input-pos pos))))
2625 (when input-pos
2626 (goto-char input-pos)))))
2629 (defun comint-previous-prompt (n)
2630 "Move to end of Nth previous prompt in the buffer.
2631 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2632 the Nth previous `input' field, otherwise, it means the Nth occurrence of
2633 text matching `comint-prompt-regexp'."
2634 (interactive "p")
2635 (comint-next-prompt (- n)))
2637 ;; State used by `comint-insert-previous-argument' when cycling.
2638 (defvar-local comint-insert-previous-argument-last-start-pos nil)
2639 (defvar-local comint-insert-previous-argument-last-index nil)
2641 ;; Needs fixing:
2642 ;; make comint-arguments understand negative indices as bash does
2643 (defun comint-insert-previous-argument (index)
2644 "Insert the INDEXth argument from the previous Comint command-line at point.
2645 Spaces are added at beginning and/or end of the inserted string if
2646 necessary to ensure that it's separated from adjacent arguments.
2647 Interactively, if no prefix argument is given, the last argument is inserted.
2648 Repeated interactive invocations will cycle through the same argument
2649 from progressively earlier commands (using the value of INDEX specified
2650 with the first command).
2651 This command is like `M-.' in bash."
2652 (interactive "P")
2653 (unless (null index)
2654 (setq index (prefix-numeric-value index)))
2655 (cond ((eq last-command this-command)
2656 ;; Delete last input inserted by this command.
2657 (delete-region comint-insert-previous-argument-last-start-pos (point))
2658 (setq index comint-insert-previous-argument-last-index))
2659 (t
2660 ;; This is a non-repeat invocation, so initialize state.
2661 (setq comint-input-ring-index nil)
2662 (setq comint-insert-previous-argument-last-index index)
2663 (when (null comint-insert-previous-argument-last-start-pos)
2664 ;; First usage; initialize to a marker
2665 (setq comint-insert-previous-argument-last-start-pos
2666 (make-marker)))))
2667 ;; Make sure we're not in the prompt, and add a beginning space if necessary.
2668 (if (<= (point) (comint-line-beginning-position))
2669 (comint-bol)
2670 (just-one-space))
2671 ;; Remember the beginning of what we insert, so we can delete it if
2672 ;; the command is repeated.
2673 (set-marker comint-insert-previous-argument-last-start-pos (point))
2674 ;; Insert the argument.
2675 (let ((input-string (comint-previous-input-string 0)))
2677 ;; strip terminating '&'
2678 (setq input-string (substring input-string 0 (match-beginning 0))))
2679 (insert (comint-arguments input-string index index)))
2680 ;; Make next invocation return arg from previous input
2681 (setq comint-input-ring-index (1+ (or comint-input-ring-index 0)))
2682 ;; Add a terminating space if necessary.
2683 (unless (eolp)
2684 (just-one-space)))
2686 \f
2687 ;; Support editing with `comint-prompt-read-only' set to t.
2689 (defun comint-update-fence ()
2690 "Update read-only status of newline before point.
2691 The `fence' read-only property is used to indicate that a newline
2693 following front-sticky read-only region. This is used to
2694 implement comint read-only prompts. If the text after a newline
2695 changes, the read-only status of that newline may need updating.
2696 That is what this function does.
2698 This function does nothing if point is not at the beginning of a
2699 line, or is at the beginning of the accessible portion of the buffer.
2700 Otherwise, if the character after point has a front-sticky
2701 read-only property, then the preceding newline is given a
2702 read-only property of `fence', unless it already is read-only.
2703 If the character after point does not have a front-sticky
2704 read-only property, any read-only property of `fence' on the
2705 preceding newline is removed."
2706 (let* ((pt (point)) (lst (get-text-property pt 'front-sticky)))
2707 (and (bolp)
2708 (not (bobp))
2709 (with-silent-modifications
2710 (if (and (get-text-property pt 'read-only)
2711 (if (listp lst) (memq 'read-only lst) t))
2712 (unless (get-text-property (1- pt) 'read-only)
2713 (put-text-property (1- pt) pt 'read-only 'fence))
2714 (when (eq (get-text-property (1- pt) 'read-only) 'fence)
2715 (remove-list-of-text-properties (1- pt) pt '(read-only))))))))
2717 (defun comint-kill-whole-line (&optional count)
2718 "Kill current line, ignoring read-only and field properties.
2719 With prefix arg COUNT, kill that many lines starting from the current line.
2720 If COUNT is negative, kill backward. Also kill the preceding newline,
2722 with negative arguments.)
2723 If COUNT is zero, kill current line but exclude the trailing newline.
2724 The read-only status of newlines is updated with `comint-update-fence',
2725 if necessary."
2726 (interactive "p")
2727 (let ((inhibit-read-only t) (inhibit-field-text-motion t))
2728 (kill-whole-line count)
2729 (when (>= count 0) (comint-update-fence))))
2731 (defun comint-kill-region (beg end)
2732 "Like `kill-region', but ignores read-only properties, if safe.
2733 This command assumes that the buffer contains read-only
2735 properties at the beginning of a line, with the preceding newline
2736 being read-only to protect the prompt. This is true of the
2737 comint prompts if `comint-prompt-read-only' is non-nil. This
2738 command will not delete the region if this would create mutilated
2739 or out of place prompts. That is, if any part of a prompt is
2740 deleted, the entire prompt must be deleted and all remaining
2741 prompts should stay at the beginning of a line. If this is not
2742 the case, this command just calls `kill-region' with all
2743 read-only properties intact. The read-only status of newlines is
2744 updated using `comint-update-fence', if necessary."
2745 (interactive "r")
2746 (save-excursion
2747 (let* ((true-beg (min beg end))
2748 (true-end (max beg end))
2749 (beg-bolp (progn (goto-char true-beg) (bolp)))
2750 (beg-lst (get-text-property true-beg 'front-sticky))
2751 (beg-bad (and (get-text-property true-beg 'read-only)
2752 (if (listp beg-lst) (memq 'read-only beg-lst) t)))
2753 (end-bolp (progn (goto-char true-end) (bolp)))
2754 (end-lst (get-text-property true-end 'front-sticky))
2755 (end-bad (and (get-text-property true-end 'read-only)
2756 (if (listp end-lst) (memq 'read-only end-lst) t))))
2757 (if (or (and (not beg-bolp) (or beg-bad end-bad))
2758 (and (not end-bolp) end-bad))
2759 (kill-region beg end)
2760 (let ((inhibit-read-only t))
2761 (kill-region beg end)
2762 (comint-update-fence))))))
2763 \f
2764 ;; Support for source-file processing commands.
2765 ;;============================================================================
2766 ;; Many command-interpreters (e.g., Lisp, Scheme, Soar) have
2767 ;; commands that process files of source text (e.g. loading or compiling
2768 ;; files). So the corresponding process-in-a-buffer modes have commands
2769 ;; for doing this (e.g., lisp-load-file). The functions below are useful
2770 ;; for defining these commands.
2771 ;;
2772 ;; Alas, these guys don't do exactly the right thing for Lisp, Scheme
2773 ;; and Soar, in that they don't know anything about file extensions.
2774 ;; So the compile/load interface gets the wrong default occasionally.
2775 ;; The load-file/compile-file default mechanism could be smarter -- it
2776 ;; doesn't know about the relationship between filename extensions and
2777 ;; whether the file is source or executable. If you compile foo.lisp
2778 ;; with compile-file, then the next load-file should use foo.bin for
2779 ;; the default, not foo.lisp. This is tricky to do right, particularly
2780 ;; because the extension for executable files varies so much (.o, .bin,
2781 ;; .lbin, .mo, .vo, .ao, ...).
2784 ;; COMINT-SOURCE-DEFAULT -- determines defaults for source-file processing
2785 ;; commands.
2786 ;;
2787 ;; COMINT-CHECK-SOURCE -- if FNAME is in a modified buffer, asks you if you
2788 ;; want to save the buffer before issuing any process requests to the command
2789 ;; interpreter.
2790 ;;
2791 ;; COMINT-GET-SOURCE -- used by the source-file processing commands to prompt
2792 ;; for the file to process.
2794 (defun comint-source-default (previous-dir/file source-modes)
2795 "Compute the defaults for `load-file' and `compile-file' commands.
2797 PREVIOUS-DIR/FILE is a pair (DIRECTORY . FILENAME) from the last
2798 source-file processing command, or nil if there hasn't been one yet.
2799 SOURCE-MODES is a list used to determine what buffers contain source
2800 files: if the major mode of the buffer is in SOURCE-MODES, it's source.
2801 Typically, (lisp-mode) or (scheme-mode).
2803 If the command is given while the cursor is inside a string, *and*
2804 the string is an existing filename, *and* the filename is not a directory,
2805 then the string is taken as default. This allows you to just position
2806 your cursor over a string that's a filename and have it taken as default.
2808 If the command is given in a file buffer whose major mode is in
2809 SOURCE-MODES, then the filename is the default file, and the
2810 file's directory is the default directory.
2812 If the buffer isn't a source file buffer (e.g., it's the process buffer),
2813 then the default directory & file are what was used in the last source-file
2814 processing command (i.e., PREVIOUS-DIR/FILE). If this is the first time
2815 the command has been run (PREVIOUS-DIR/FILE is nil), the default directory
2818 SOURCE-MODES is typically going to be something like (tea-mode)
2819 for T programs, (lisp-mode) for Lisp programs, (soar-mode lisp-mode)
2820 for Soar programs, etc.
2822 The function returns a pair: (default-directory . default-file)."
2823 (cond ((and buffer-file-name (memq major-mode source-modes))
2824 (cons (file-name-directory buffer-file-name)
2825 (file-name-nondirectory buffer-file-name)))
2826 (previous-dir/file)
2827 (t
2828 (cons default-directory nil))))
2831 (defun comint-check-source (fname)
2832 "Check whether to save buffers visiting file FNAME.
2833 Prior to loading or compiling (or otherwise processing) a file (in the CMU
2834 process-in-a-buffer modes), this function can be called on the filename.
2835 If the file is loaded into a buffer, and the buffer is modified, the user
2836 is queried to see if he wants to save the buffer before proceeding with
2837 the load or compile."
2838 (let ((buff (get-file-buffer fname)))
2839 (if (and buff
2840 (buffer-modified-p buff)
2841 (y-or-n-p (format "Save buffer %s first? " (buffer-name buff))))
2842 (with-current-buffer buff
2843 (save-buffer)))))
2845 (defun comint-extract-string ()
2846 "Return string around point, or nil."
2847 (let ((syntax (syntax-ppss)))
2848 (when (nth 3 syntax)
2849 (condition-case ()
2850 (buffer-substring-no-properties (1+ (nth 8 syntax))
2851 (progn (goto-char (nth 8 syntax))
2852 (forward-sexp)
2853 (1- (point))))
2854 (error nil)))))
2856 (defun comint-get-source (prompt prev-dir/file source-modes mustmatch-p)
2857 "Prompt for filenames in commands that process source files,
2858 e.g. loading or compiling a file.
2859 Provides a default, if there is one, and returns the result filename.
2861 See `comint-source-default' for more on determining defaults.
2863 PROMPT is the prompt string. PREV-DIR/FILE is the (DIRECTORY . FILE) pair
2864 from the last source processing command. SOURCE-MODES is a list of major
2865 modes used to determine what file buffers contain source files. (These
2866 two arguments are used for determining defaults.) If MUSTMATCH-P is true,
2867 then the filename reader will only accept a file that exists.
2869 A typical use:
2872 (let* ((def (comint-source-default prev-dir/file source-modes))
2873 (stringfile (comint-extract-string))
2874 (sfile-p (and stringfile
2875 (condition-case ()
2876 (file-exists-p stringfile)
2877 (error nil))
2878 (not (file-directory-p stringfile))))
2879 (defdir (if sfile-p (file-name-directory stringfile)
2880 (car def)))
2881 (deffile (if sfile-p (file-name-nondirectory stringfile)
2882 (cdr def)))
2883 (ans (read-file-name (if deffile (format "%s(default %s) "
2884 prompt deffile)
2885 prompt)
2886 defdir
2887 (concat defdir deffile)
2888 mustmatch-p)))
2889 (list (expand-file-name (substitute-in-file-name ans)))))
2891 ;; I am somewhat divided on this string-default feature. It seems
2892 ;; to violate the principle-of-least-astonishment, in that it makes
2893 ;; the default harder to predict, so you actually have to look and see
2894 ;; what the default really is before choosing it. This can trip you up.
2895 ;; On the other hand, it can be useful, I guess. I would appreciate feedback
2896 ;; on this.
2897 ;; -Olin
2899 \f
2900 ;; Simple process query facility.
2901 ;; ===========================================================================
2902 ;; This function is for commands that want to send a query to the process
2903 ;; and show the response to the user. For example, a command to get the
2904 ;; arglist for a Common Lisp function might send a "(arglist 'foo)" query
2905 ;; to an inferior Common Lisp process.
2906 ;;
2907 ;; This simple facility just sends strings to the inferior process and pops
2908 ;; up a window for the process buffer so you can see what the process
2909 ;; responds with. We don't do anything fancy like try to intercept what the
2910 ;; process responds with and put it in a pop-up window or on the message
2911 ;; line. We just display the buffer. Low tech. Simple. Works good.
2913 (defun comint-proc-query (proc str)
2914 "Send to the inferior process PROC the string STR.
2915 Pop-up but do not select a window for the inferior process so that
2916 its response can be seen."
2917 (let* ((proc-buf (process-buffer proc))
2918 (proc-mark (process-mark proc)))
2919 (display-buffer proc-buf)
2920 (set-buffer proc-buf) ; but it's not the selected *window*
2921 (let ((proc-win (get-buffer-window proc-buf 0))
2922 (proc-pt (marker-position proc-mark)))
2923 (comint-send-string proc str) ; send the query
2924 (accept-process-output proc) ; wait for some output
2925 ;; Try to position the proc window so you can see the answer.
2926 ;; This is bogus code. If you delete the (sit-for 0), it breaks.
2927 ;; I don't know why. Wizards invited to improve it.
2928 (unless (pos-visible-in-window-p proc-pt proc-win)
2929 (let ((opoint (window-point proc-win)))
2930 (set-window-point proc-win proc-mark)
2931 (sit-for 0)
2932 (if (not (pos-visible-in-window-p opoint proc-win))
2933 (push-mark opoint)
2934 (set-window-point proc-win opoint)))))))
2936 \f
2937 ;; Filename/command/history completion in a buffer
2938 ;; ===========================================================================
2939 ;; Useful completion functions, courtesy of the Ergo group.
2941 ;; Six commands:
2942 ;; completion-at-point Complete or expand command, filename,
2943 ;; history at point.
2944 ;; comint-dynamic-complete-filename Complete filename at point.
2945 ;; comint-dynamic-list-filename-completions List completions in help buffer.
2946 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
2947 ;; replace with expanded/completed name.
2949 ;; These are not installed in the comint-mode keymap. But they are
2950 ;; available for people who want them. Shell-mode installs them:
2952 ;; (define-key shell-mode-map "\M-?"
2953 ;; 'comint-dynamic-list-filename-completions)))
2954 ;;
2955 ;; Commands like this are fine things to put in load hooks if you
2956 ;; want them present in specific modes.
2958 (defcustom comint-completion-autolist nil
2959 "If non-nil, automatically list possibilities on partial completion.
2960 This mirrors the optional behavior of tcsh."
2961 :type 'boolean
2962 :group 'comint-completion)
2964 (defcustom comint-completion-addsuffix t
2965 "If non-nil, add ` ' to file names.
2966 It can either be a string FILESUFFIX or a cons (DIRSUFFIX . FILESUFFIX)
2967 where DIRSUFFIX is ignored and FILESUFFIX is a string added on unambiguous
2968 or exact completion.
2969 This mirrors the optional behavior of tcsh."
2970 :type '(choice (const :tag "None" nil)
2971 (const :tag "Add SPC" t)
2972 (string :tag "File suffix")
2973 (cons :tag "Obsolete suffix pair"
2974 (string :tag "Ignored")
2975 (string :tag "File suffix")))
2976 :group 'comint-completion)
2978 (defcustom comint-completion-recexact nil
2979 "If non-nil, use shortest completion if characters cannot be added.
2980 This mirrors the optional behavior of tcsh.
2982 A non-nil value is useful if `comint-completion-autolist' is non-nil too."
2983 :type 'boolean
2984 :group 'comint-completion)
2986 (defcustom comint-completion-fignore nil
2987 "List of suffixes to be disregarded during file completion.
2988 This mirrors the optional behavior of bash and tcsh.
2990 Note that this applies to `comint-dynamic-complete-filename' only."
2991 :type '(repeat (string :tag "Suffix"))
2992 :group 'comint-completion)
2994 ;;;###autoload
2995 (defvar comint-file-name-prefix (purecopy "")
2996 "Prefix prepended to absolute file names taken from process input.
2997 This is used by Comint's and shell's completion functions, and by shell's
2998 directory tracking functions.")
3000 (defvar comint-file-name-chars
3001 (if (memq system-type '(ms-dos windows-nt cygwin))
3002 "~/A-Za-z0-9_^$!#%&{}@`'.,:()-"
3003 "[]~/A-Za-z0-9+@:_.$#%,={}-")
3004 "String of characters valid in a file name.
3005 Note that all non-ASCII characters are considered valid in a file name
3006 regardless of what this variable says.
3008 This is a good thing to set in mode hooks.")
3010 (defvar comint-file-name-quote-list nil
3013 This is a good thing to set in mode hooks.")
3016 (defun comint-directory (directory)
3017 "Return expanded DIRECTORY, with `comint-file-name-prefix' if absolute."
3018 (expand-file-name (if (file-name-absolute-p directory)
3019 (concat comint-file-name-prefix directory)
3020 directory)))
3023 (defun comint-word (word-chars)
3024 "Return the word of WORD-CHARS at point, or nil if none is found.
3025 Word constituents are considered to be those in WORD-CHARS, which is like the
3027 ;; FIXME: Need to handle "..." and '...' quoting in shell.el!
3028 ;; This should be combined with completion parsing somehow.
3029 (save-excursion
3030 (let ((here (point))
3031 giveup)
3032 (while (not giveup)
3033 (let ((startpoint (point)))
3035 (if (and comint-file-name-quote-list
3037 (forward-char -2))
3038 ;; FIXME: This isn't consistent with Bash, at least -- not
3039 ;; all non-ASCII chars should be word constituents.
3040 (if (and (not (bobp)) (>= (char-before) 128))
3041 (forward-char -1))
3042 (if (= (point) startpoint)
3043 (setq giveup t))))
3044 ;; Set match-data to match the entire string.
3045 (when (< (point) here)
3046 (set-match-data (list (point) here))
3047 (match-string 0)))))
3049 (defun comint-substitute-in-file-name (filename)
3050 "Return FILENAME with environment variables substituted.
3051 Supports additional environment variable syntax of the command
3052 interpreter (e.g., the percent notation of cmd.exe on Windows)."
3053 (let ((name (substitute-in-file-name filename)))
3054 (if (memq system-type '(ms-dos windows-nt))
3055 (let (env-var-name
3056 env-var-val)
3057 (save-match-data
3059 (setq env-var-name (match-string 1 name))
3060 (setq env-var-val (or (getenv env-var-name) ""))
3061 (setq name (replace-match env-var-val t t name))))))
3062 name))
3064 (defun comint--match-partial-filename ()
3065 "Return the filename at point as-is, or nil if none is found.
3066 See `comint-word'."
3067 (comint-word comint-file-name-chars))
3069 (defun comint--unquote&requote-argument (qstr &optional upos)
3070 (unless upos (setq upos 0))
3071 (let* ((qpos 0)
3072 (ustrs '())
3073 (re (concat
3076 (when (memq system-type '(ms-dos windows-nt))
3078 (when comint-file-name-quote-list
3080 (qupos nil)
3081 (push (lambda (str end)
3082 (push str ustrs)
3083 (setq upos (- upos (length str)))
3084 (unless (or qupos (> upos 0))
3085 (setq qupos (if (< end 0) (- end) (+ upos end))))))
3086 match)
3087 (while (setq match (string-match re qstr qpos))
3088 (funcall push (substring qstr qpos match) match)
3089 (cond
3090 ((match-beginning 2) (funcall push (match-string 2 qstr) (match-end 0)))
3091 ((match-beginning 1) (funcall push (getenv (match-string 1 qstr))
3092 (- (match-end 0))))
3093 (t (error "Unexpected case in comint--unquote&requote-argument!")))
3094 (setq qpos (match-end 0)))
3095 (funcall push (substring qstr qpos) (length qstr))
3096 (list (mapconcat #'identity (nreverse ustrs) "")
3097 qupos #'comint-quote-filename)))
3099 (defun comint--unquote-argument (str)
3100 (car (comint--unquote&requote-argument str)))
3101 (define-obsolete-function-alias 'comint--unquote&expand-filename
3102 #'comint--unquote-argument "24.3")
3104 (defun comint-match-partial-filename ()
3105 "Return the unquoted&expanded filename at point, or nil if none is found.
3106 Environment variables are substituted. See `comint-word'."
3107 (let ((filename (comint--match-partial-filename)))
3108 (and filename (comint--unquote-argument filename))))
3110 (defun comint-quote-filename (filename)
3111 "Return FILENAME with magic characters quoted.
3112 Magic characters are those in `comint-file-name-quote-list'."
3113 (if (null comint-file-name-quote-list)
3114 filename
3115 (let ((regexp (regexp-opt-charset comint-file-name-quote-list)))
3116 (save-match-data
3117 (let ((i 0))
3118 (while (string-match regexp filename i)
3120 (setq i (1+ (match-end 0)))))
3121 filename))))
3123 (defun comint-unquote-filename (filename)
3124 "Return FILENAME with quoted characters unquoted."
3125 (declare (obsolete nil "24.3"))
3126 (if (null comint-file-name-quote-list)
3127 filename
3128 (save-match-data
3131 (defun comint--requote-argument (upos qstr)
3132 ;; See `completion-table-with-quoting'.
3133 (let ((res (comint--unquote&requote-argument qstr upos)))
3134 (cons (nth 1 res) (nth 2 res))))
3136 (defun comint-completion-at-point ()
3137 (run-hook-with-args-until-success 'comint-dynamic-complete-functions))
3139 (define-obsolete-function-alias
3140 'comint-dynamic-complete
3141 'completion-at-point "24.1")
3143 (defun comint-dynamic-complete-filename ()
3144 "Dynamically complete the filename at point.
3145 Completes if after a filename.
3146 This function is similar to `comint-replace-by-expanded-filename', except that
3147 it won't change parts of the filename already entered in the buffer; it just
3148 adds completion characters to the end of the filename. A completions listing
3149 may be shown in a separate buffer if completion is ambiguous.
3151 Completion is dependent on the value of `comint-completion-addsuffix',
3152 `comint-completion-recexact' and `comint-completion-fignore', and the timing of
3153 completions listing is dependent on the value of `comint-completion-autolist'.
3155 Returns t if successful."
3156 (interactive)
3157 (when (comint--match-partial-filename)
3158 (unless (window-minibuffer-p)
3159 (message "Completing file name..."))
3160 (let ((data (comint--complete-file-name-data)))
3161 (completion-in-region (nth 0 data) (nth 1 data) (nth 2 data)))))
3163 (defun comint-filename-completion ()
3164 "Return completion data for filename at point, if any."
3165 (when (comint--match-partial-filename)
3166 (comint--complete-file-name-data)))
3168 (defun comint-completion-file-name-table (string pred action)
3169 (if (not (file-name-absolute-p string))
3170 (completion-file-name-table string pred action)
3171 (cond
3172 ((memq action '(t lambda))
3173 (completion-file-name-table
3174 (concat comint-file-name-prefix string) pred action))
3175 ((null action)
3176 (let ((res (completion-file-name-table
3177 (concat comint-file-name-prefix string) pred action)))
3178 (if (and (stringp res)
3179 (string-match
3181 res))
3182 (substring res (match-end 0))
3183 res)))
3184 (t (completion-file-name-table string pred action)))))
3186 (defvar comint-unquote-function #'comint--unquote-argument
3187 "Function to use for completion of quoted data.
3188 See `completion-table-with-quoting' and `comint-requote-function'.")
3189 (defvar comint-requote-function #'comint--requote-argument
3190 "Function to use for completion of quoted data.
3191 See `completion-table-with-quoting' and `comint-unquote-function'.")
3193 (defun comint--complete-file-name-data ()
3194 "Return the completion data for file name at point."
3195 (let* ((filesuffix (cond ((not comint-completion-addsuffix) "")
3196 ((stringp comint-completion-addsuffix)
3197 comint-completion-addsuffix)
3198 ((not (consp comint-completion-addsuffix)) " ")
3199 (t (cdr comint-completion-addsuffix))))
3200 (filename (comint--match-partial-filename))
3201 (filename-beg (if filename (match-beginning 0) (point)))
3202 (filename-end (if filename (match-end 0) (point)))
3203 (table
3204 (completion-table-with-quoting
3205 #'comint-completion-file-name-table
3206 comint-unquote-function
3207 comint-requote-function)))
3208 (nconc
3209 (list
3210 filename-beg filename-end
3211 (lambda (string pred action)
3212 (let ((completion-ignore-case read-file-name-completion-ignore-case)
3213 (completion-ignored-extensions comint-completion-fignore))
3214 (complete-with-action action table string pred))))
3215 (unless (zerop (length filesuffix))
3216 (list :exit-function
3217 (lambda (_s status)
3218 (when (eq status 'finished)
3219 (if (looking-at (regexp-quote filesuffix))
3220 (goto-char (match-end 0))
3221 (insert filesuffix)))))))))
3223 (defun comint-dynamic-complete-as-filename ()
3224 "Dynamically complete at point as a filename.
3225 See `comint-dynamic-complete-filename'. Returns t if successful."
3226 (declare (obsolete comint-filename-completion "24.1"))
3227 (let ((data (comint--complete-file-name-data)))
3228 (completion-in-region (nth 0 data) (nth 1 data) (nth 2 data))))
3230 (defun comint-replace-by-expanded-filename ()
3231 "Dynamically expand and complete the filename at point.
3232 Replace the filename with an expanded, canonicalized and
3233 completed replacement, i.e. substituting environment
3234 variables (e.g. $HOME), `~'s, `..', and `.', and making the
3235 filename absolute. For expansion see `expand-file-name' and
3236 `substitute-in-file-name'. For completion see
3237 `comint-dynamic-complete-filename'."
3238 (interactive)
3239 (let ((filename (comint-match-partial-filename)))
3240 (when filename
3241 (replace-match (expand-file-name filename) t t)
3242 (comint-dynamic-complete-filename))))
3245 (defun comint-dynamic-simple-complete (stub candidates)
3246 "Dynamically complete STUB from CANDIDATES list.
3247 This function inserts completion characters at point by
3248 completing STUB from the strings in CANDIDATES. If completion is
3249 ambiguous, possibly show a completions listing in a separate
3250 buffer.
3252 Return nil if no completion was inserted.
3253 Return `sole' if completed with the only completion match.
3254 Return `shortest' if completed with the shortest match.
3255 Return `partial' if completed as far as possible.
3256 Return `listed' if a completion listing was shown.
3258 See also `comint-dynamic-complete-filename'."
3259 (declare (obsolete completion-in-region "24.1"))
3260 (let* ((completion-ignore-case (memq system-type '(ms-dos windows-nt cygwin)))
3261 (minibuffer-p (window-minibuffer-p))
3262 (suffix (cond ((not comint-completion-addsuffix) "")
3263 ((not (consp comint-completion-addsuffix)) " ")
3264 (t (cdr comint-completion-addsuffix))))
3265 (completions (all-completions stub candidates)))
3266 (cond ((null completions)
3267 (if minibuffer-p
3268 (minibuffer-message "No completions of %s" stub)
3269 (message "No completions of %s" stub))
3270 nil)
3271 ((= 1 (length completions)) ; Gotcha!
3272 (let ((completion (car completions)))
3273 (if (string-equal completion stub)
3274 (unless minibuffer-p
3275 (message "Sole completion"))
3276 (insert (substring completion (length stub)))
3277 (unless minibuffer-p
3278 (message "Completed")))
3279 (insert suffix)
3280 'sole))
3281 (t ; There's no unique completion.
3282 (let ((completion (try-completion stub candidates)))
3283 ;; Insert the longest substring.
3284 (insert (substring completion (length stub)))
3285 (cond ((and comint-completion-recexact comint-completion-addsuffix
3286 (string-equal stub completion)
3287 (member completion completions))
3288 ;; It's not unique, but user wants shortest match.
3289 (insert suffix)
3290 (unless minibuffer-p
3291 (message "Completed shortest"))
3292 'shortest)
3293 ((or comint-completion-autolist
3294 (string-equal stub completion))
3295 ;; It's not unique, list possible completions.
3296 (comint-dynamic-list-completions completions stub)
3297 'listed)
3298 (t
3299 (unless minibuffer-p
3300 (message "Partially completed"))
3301 'partial)))))))
3303 (defun comint-dynamic-list-filename-completions ()
3304 "Display a list of possible completions for the filename at point."
3305 (interactive)
3306 (let* ((data (comint--complete-file-name-data))
3307 (minibuffer-completion-table (nth 2 data))
3308 (minibuffer-completion-predicate nil)
3309 (ol (make-overlay (nth 0 data) (nth 1 data) nil nil t)))
3310 (overlay-put ol 'field 'completion)
3311 (unwind-protect
3312 (call-interactively 'minibuffer-completion-help)
3313 (delete-overlay ol))))
3316 ;; This is bound locally in a *Completions* buffer to the list of
3317 ;; completions displayed, and is used to detect the case where the same
3318 ;; command is repeatedly used without the set of completions changing.
3319 (defvar comint-displayed-dynamic-completions nil)
3321 (defvar comint-dynamic-list-completions-config nil)
3323 (defun comint-dynamic-list-completions (completions &optional common-substring)
3324 "Display a list of sorted COMPLETIONS.
3325 Typing SPC flushes the completions buffer.
3327 The optional argument COMMON-SUBSTRING, if non-nil, should be a string
3328 specifying a common substring for adding the faces
3329 `completions-first-difference' and `completions-common-part' to
3330 the completions."
3331 (let ((window (get-buffer-window "*Completions*" 0)))
3332 (setq completions (sort completions 'string-lessp))
3333 (if (and (eq last-command this-command)
3334 window (window-live-p window) (window-buffer window)
3335 (buffer-name (window-buffer window))
3336 ;; The above tests are not sufficient to detect the case where we
3337 ;; should scroll, because the top-level interactive command may
3338 ;; not have displayed a completions window the last time it was
3339 ;; invoked, and there may be such a window left over from a
3340 ;; previous completion command with a different set of
3341 ;; completions. To detect that case, we also test that the set
3342 ;; of displayed completions is in fact the same as the previously
3343 ;; displayed set.
3344 (equal completions
3345 (buffer-local-value 'comint-displayed-dynamic-completions
3346 (window-buffer window))))
3347 ;; If this command was repeated, and
3348 ;; there's a fresh completion window with a live buffer,
3349 ;; and this command is repeated, scroll that window.
3350 (with-current-buffer (window-buffer window)
3351 (if (pos-visible-in-window-p (point-max) window)
3352 (set-window-start window (point-min))
3353 (save-selected-window
3354 (select-window window)
3355 (scroll-up))))
3357 ;; Display a completion list for the first time.
3358 (setq comint-dynamic-list-completions-config
3359 (current-window-configuration))
3360 (with-output-to-temp-buffer "*Completions*"
3361 (display-completion-list
3362 (completion-hilit-commonality completions (length common-substring))))
3363 (if (window-minibuffer-p)
3364 (minibuffer-message "Type space to flush; repeat completion command to scroll")
3365 (message "Type space to flush; repeat completion command to scroll")))
3367 ;; Read the next key, to process SPC.
3368 (let (key first)
3369 (if (with-current-buffer (get-buffer "*Completions*")
3370 (setq-local comint-displayed-dynamic-completions
3371 completions)
3372 (setq key (read-key-sequence nil)
3373 first (aref key 0))
3374 (and (consp first) (consp (event-start first))
3375 (eq (window-buffer (posn-window (event-start first)))
3376 (get-buffer "*Completions*"))
3377 (memq (key-binding key)
3378 '(mouse-choose-completion choose-completion))))
3379 ;; If the user does choose-completion with the mouse,
3380 ;; execute the command, then delete the completion window.
3381 (progn
3382 (choose-completion first)
3383 (set-window-configuration comint-dynamic-list-completions-config))
3384 (if (eq first ?\s)
3385 (set-window-configuration comint-dynamic-list-completions-config)
3386 (setq unread-command-events
3387 (nconc (listify-key-sequence key) unread-command-events)))))))
3388 \f
3389 (defun comint-get-next-from-history ()
3390 "After fetching a line from input history, this fetches the following line.
3391 In other words, this recalls the input line after the line you recalled last.
3392 You can use this to repeat a sequence of input lines."
3393 (interactive)
3394 (if comint-save-input-ring-index
3395 (progn
3396 (setq comint-input-ring-index (1+ comint-save-input-ring-index))
3397 (comint-next-input 1))
3398 (message "No previous history command")))
3400 (defun comint-accumulate ()
3401 "Accumulate a line to send as input along with more lines.
3402 This inserts a newline so that you can enter more text
3404 to send all the accumulated input, at once.
3405 The entire accumulated text becomes one item in the input history
3406 when you send it."
3407 (interactive)
3409 (set-marker comint-accum-marker (point))
3410 (if comint-input-ring-index
3411 (setq comint-save-input-ring-index
3412 (- comint-input-ring-index 1))))
3414 (defun comint-goto-process-mark ()
3415 "Move point to the process mark.
3416 The process mark separates output, and input already sent,
3417 from input that has not yet been sent."
3418 (interactive)
3419 (let ((proc (or (get-buffer-process (current-buffer))
3420 (user-error "Current buffer has no process"))))
3421 (goto-char (process-mark proc))
3422 (when (called-interactively-p 'interactive)
3423 (message "Point is now at the process mark"))))
3425 (defun comint-bol-or-process-mark ()
3426 "Move point to beginning of line (after prompt) or to the process mark.
3427 The first time you use this command, it moves to the beginning of the line
3428 \(but after the prompt, if any). If you repeat it again immediately,
3429 it moves point to the process mark.
3431 The process mark separates the process output, along with input already sent,
3432 from input that has not yet been sent. Ordinarily, the process mark
3433 is at the beginning of the current input line; but if you have
3435 the process mark is at the beginning of the accumulated input."
3436 (interactive)
3437 (if (not (eq last-command 'comint-bol-or-process-mark))
3438 (comint-bol nil)
3439 (comint-goto-process-mark)))
3441 (defun comint-set-process-mark ()
3442 "Set the process mark at point."
3443 (interactive)
3444 (let ((proc (or (get-buffer-process (current-buffer))
3445 (user-error "Current buffer has no process"))))
3446 (set-marker (process-mark proc) (point))
3447 (message "Process mark set")))
3449 \f
3450 ;; Author: Peter Breton <pbreton@cs.umb.edu>
3452 ;; This little add-on for comint is intended to make it easy to get
3453 ;; output from currently active comint buffers into another buffer,
3454 ;; or buffers, and then go back to using the comint shell.
3455 ;;
3456 ;; My particular use is SQL interpreters; I want to be able to execute a
3457 ;; query using the process associated with a comint-buffer, and save that
3458 ;; somewhere else. Because the process might have state (for example, it
3459 ;; could be in an uncommitted transaction), just running starting a new
3460 ;; process and having it execute the query and then finish, would not
3461 ;; work. I'm sure there are other uses as well, although in many cases
3462 ;; starting a new process is the simpler, and thus preferable, approach.
3463 ;;
3464 ;; The basic implementation is as follows: comint-redirect changes the
3465 ;; preoutput filter functions (`comint-preoutput-filter-functions') to use
3466 ;; its own filter. The filter puts the output into the designated buffer,
3467 ;; or buffers, until it sees a regexp that tells it to stop (by default,
3468 ;; this is the prompt for the interpreter, `comint-prompt-regexp'). When it
3469 ;; sees the stop regexp, it restores the old filter functions, and runs
3470 ;; `comint-redirect-hook'.
3471 ;;
3472 ;; Each comint buffer may only use one redirection at a time, but any number
3473 ;; of different comint buffers may be simultaneously redirected.
3474 ;;
3475 ;; NOTE: It is EXTREMELY important that `comint-prompt-regexp' be set to the
3476 ;; correct prompt for your interpreter, or that you supply a regexp that says
3477 ;; when the redirection is finished. Otherwise, redirection will continue
3478 ;; indefinitely. The code now does a sanity check to ensure that it can find
3479 ;; a prompt in the comint buffer; however, it is still important to ensure that
3480 ;; this prompt is set correctly.
3481 ;;
3482 ;; XXX: This doesn't work so well unless `comint-prompt-regexp' is set;
3483 ;; perhaps it should prompt for a terminating string (with an
3484 ;; appropriate magic default by examining what we think is the prompt)?
3485 ;;
3486 ;; Fixme: look for appropriate fields, rather than regexp, if
3487 ;; `comint-use-prompt-regexp' is true.
3489 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3490 ;; Variables
3491 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3493 (defcustom comint-redirect-verbose nil
3494 "If non-nil, print messages each time the redirection filter is invoked.
3495 Also print a message when redirection is completed."
3496 :group 'comint
3497 :type 'boolean)
3499 ;; Directly analogous to comint-preoutput-filter-functions
3500 (defvar comint-redirect-filter-functions nil
3501 "List of functions to call before inserting redirected process output.
3502 Each function gets one argument, a string containing the text received
3503 from the subprocess. It should return the string to insert, perhaps
3504 the same string that was received, or perhaps a modified or transformed
3505 string.
3507 The functions on the list are called sequentially, and each one is given
3508 the string returned by the previous one. The string returned by the
3509 last function is the text that is actually inserted in the redirection buffer.
3511 You can use `add-hook' to add functions to this list
3512 either globally or locally.")
3514 ;; Internal variables
3516 (defvar comint-redirect-output-buffer nil
3517 "The buffer or list of buffers to put output into.")
3519 (defvar comint-redirect-finished-regexp nil
3520 "Regular expression that determines when to stop redirection in Comint.
3521 When the redirection filter function is given output that matches this regexp,
3522 the output is inserted as usual, and redirection is completed.")
3524 (defvar comint-redirect-insert-matching-regexp nil
3525 "If non-nil, the text that ends a redirection is included in it.
3526 More precisely, the text that matches `comint-redirect-finished-regexp'
3527 and therefore terminates an output redirection is inserted in the
3528 redirection target buffer, along with the preceding output.")
3530 (defvar comint-redirect-echo-input nil
3531 "Non-nil means echo input in the process buffer even during redirection.")
3533 (defvar comint-redirect-completed nil
3534 "Non-nil if redirection has completed in the current buffer.")
3536 (defvar comint-redirect-original-mode-line-process nil
3537 "Original mode line for redirected process.")
3539 (defvar comint-redirect-perform-sanity-check t
3540 "If non-nil, check that redirection is likely to complete successfully.
3541 More precisely, before starting a redirection, verify that the
3542 regular expression `comint-redirect-finished-regexp' that controls
3543 when to terminate it actually matches some text already in the process
3544 buffer. The idea is that this regular expression should match a prompt
3545 string, and that there ought to be at least one copy of your prompt string
3546 in the process buffer already.")
3548 (defvar comint-redirect-subvert-readonly nil
3549 "Non-nil means `comint-redirect' can insert into read-only buffers.
3550 This works by binding `inhibit-read-only' around the insertion.
3551 This is useful, for instance, for insertion into Help mode buffers.
3552 You probably want to set it locally to the output buffer.")
3554 (defvar comint-redirect-previous-input-string nil
3555 "Last redirected line of text.
3556 Allows detection of the end of the redirection in case the
3557 completion string is split between two output segments.")
3559 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3560 ;; Functions
3561 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3563 (defun comint-redirect-setup (output-buffer
3564 comint-buffer
3565 finished-regexp
3566 &optional echo-input)
3567 "Set up for output redirection.
3568 This function sets local variables that are used by `comint-redirect-filter'
3569 to perform redirection.
3571 Output from COMINT-BUFFER is redirected to OUTPUT-BUFFER, until something
3572 in the output matches FINISHED-REGEXP.
3574 If optional argument ECHO-INPUT is non-nil, output is echoed to the
3575 original Comint buffer.
3577 This function is called by `comint-redirect-send-command-to-process',
3578 and does not normally need to be invoked by the end user or programmer."
3579 (with-current-buffer comint-buffer
3581 (setq-local comint-redirect-original-mode-line-process mode-line-process)
3583 (setq-local comint-redirect-output-buffer output-buffer)
3585 (setq-local comint-redirect-finished-regexp finished-regexp)
3587 (setq-local comint-redirect-echo-input echo-input)
3589 (setq-local comint-redirect-completed nil)
3591 (setq-local comint-redirect-previous-input-string "")
3593 (setq mode-line-process
3594 (if mode-line-process
3595 (list (concat (elt mode-line-process 0) " Redirection"))
3596 (list ":%s Redirection")))))
3598 (defun comint-redirect-cleanup ()
3599 "End a Comint redirection. See `comint-redirect-send-command'."
3600 (interactive)
3601 ;; Release the last redirected string
3602 (setq comint-redirect-previous-input-string nil)
3603 ;; Restore the process filter
3604 (remove-function (process-filter (get-buffer-process (current-buffer)))
3605 #'comint-redirect-filter)
3606 ;; Restore the mode line
3607 (setq mode-line-process comint-redirect-original-mode-line-process)
3608 ;; Set the completed flag
3609 (setq comint-redirect-completed t))
3611 ;; Because the cleanup happens as a callback, it's not easy to guarantee
3612 ;; that it really occurs.
3613 (defalias 'comint-redirect-remove-redirection 'comint-redirect-cleanup)
3615 (defun comint-redirect-filter (orig-filter process input-string)
3616 "Filter function which redirects output from PROCESS to a buffer or buffers.
3617 The variable `comint-redirect-output-buffer' says which buffer(s) to
3618 place output in.
3620 INPUT-STRING is the input from the Comint process.
3622 This function runs as a process filter, and does not need to be invoked by the
3623 end user."
3624 (and process
3625 (with-current-buffer (process-buffer process)
3626 (comint-redirect-preoutput-filter input-string)
3627 ;; If we have to echo output, give it to the original filter function
3628 (and comint-redirect-echo-input
3629 orig-filter
3630 (funcall orig-filter process input-string)))))
3633 (defun comint-redirect-preoutput-filter (input-string)
3634 "Comint filter function which redirects Comint output to a buffer or buffers.
3635 The variable `comint-redirect-output-buffer' says which buffer(s) to
3636 place output in.
3638 INPUT-STRING is the input from the Comint process.
3640 This function does not need to be invoked by the end user."
3641 (let ((output-buffer-list
3642 (if (listp comint-redirect-output-buffer)
3643 comint-redirect-output-buffer
3644 (list comint-redirect-output-buffer)))
3645 (filtered-input-string input-string))
3647 ;; If there are any filter functions, give them a chance to modify
3648 ;; the string.
3649 (let ((functions comint-redirect-filter-functions))
3650 (while (and functions filtered-input-string)
3651 (if (eq (car functions) t)
3652 ;; If a local value says "use the default value too",
3653 ;; do that.
3654 (let ((functions
3655 (default-value 'comint-redirect-filter-functions)))
3656 (while (and functions filtered-input-string)
3657 (setq filtered-input-string
3658 (funcall (car functions) filtered-input-string))
3659 (setq functions (cdr functions))))
3660 (setq filtered-input-string
3661 (funcall (car functions) filtered-input-string)))
3662 (setq functions (cdr functions))))
3664 ;; Clobber `comint-redirect-finished-regexp'
3665 (or comint-redirect-insert-matching-regexp
3666 (and (string-match comint-redirect-finished-regexp filtered-input-string)
3667 (setq filtered-input-string
3668 (replace-match "" nil nil filtered-input-string))))
3670 ;; Send output to all registered buffers
3671 (save-excursion
3672 (dolist (buf output-buffer-list)
3673 ;; Set this buffer to the output buffer
3674 (set-buffer (get-buffer-create buf))
3675 ;; Go to the end of the buffer
3676 (goto-char (point-max))
3677 ;; Insert the output
3678 (let ((inhibit-read-only comint-redirect-subvert-readonly))
3679 (insert filtered-input-string))))
3681 ;; Message
3682 (and comint-redirect-verbose
3683 (message "Redirected output to buffer(s) %s" output-buffer-list))
3685 ;; If we see the prompt, tidy up
3686 ;; We'll look for the prompt in the original string, so nobody can
3687 ;; clobber it
3688 (and (string-match comint-redirect-finished-regexp
3689 (concat comint-redirect-previous-input-string
3690 input-string))
3691 (progn
3692 (and comint-redirect-verbose
3693 (message "Redirection completed"))
3694 (comint-redirect-cleanup)
3695 (run-hooks 'comint-redirect-hook)))
3696 (setq comint-redirect-previous-input-string input-string)
3698 ;; Echo input?
3699 (if comint-redirect-echo-input
3700 filtered-input-string
3701 "")))
3703 ;;;###autoload
3704 (defun comint-redirect-send-command (command output-buffer echo &optional no-display)
3705 "Send COMMAND to process in current buffer, with output to OUTPUT-BUFFER.
3706 With prefix arg ECHO, echo output in process buffer.
3708 If NO-DISPLAY is non-nil, do not show the output buffer."
3710 (let ((process (get-buffer-process (current-buffer))))
3711 (if process
3712 (comint-redirect-send-command-to-process
3713 command output-buffer (current-buffer) echo no-display)
3714 (error "No process for current buffer"))))
3716 ;;;###autoload
3717 (defun comint-redirect-send-command-to-process
3718 (command output-buffer process echo &optional no-display)
3719 "Send COMMAND to PROCESS, with output to OUTPUT-BUFFER.
3720 With prefix arg, echo output in process buffer.
3722 If NO-DISPLAY is non-nil, do not show the output buffer."
3724 (let* (;; The process buffer
3725 (process-buffer (if (processp process)
3726 (process-buffer process)
3727 process))
3728 (proc (get-buffer-process process-buffer)))
3729 ;; Change to the process buffer
3730 (with-current-buffer process-buffer
3732 ;; Make sure there's a prompt in the current process buffer
3733 (and comint-redirect-perform-sanity-check
3734 (save-excursion
3735 (goto-char (point-max))
3736 (or (re-search-backward comint-prompt-regexp nil t)
3737 (error "No prompt found or `comint-prompt-regexp' not set properly"))))
3739 ;; Set up for redirection
3740 (comint-redirect-setup
3741 output-buffer
3742 (current-buffer) ; Comint Buffer
3743 comint-prompt-regexp ; Finished Regexp
3744 echo) ; Echo input
3746 ;; Set the filter.
3747 (add-function :around (process-filter proc) #'comint-redirect-filter)
3749 ;; Send the command
3752 ;; Show the output
3753 (or no-display
3754 (display-buffer
3755 (get-buffer-create
3756 (if (listp output-buffer)
3757 (car output-buffer)
3758 output-buffer)))))))
3760 ;;;###autoload
3761 (defun comint-redirect-results-list (command regexp regexp-group)
3762 "Send COMMAND to current process.
3763 Return a list of expressions in the output which match REGEXP.
3764 REGEXP-GROUP is the regular expression group in REGEXP to use."
3765 (comint-redirect-results-list-from-process
3766 (get-buffer-process (current-buffer))
3767 command regexp regexp-group))
3769 ;;;###autoload
3770 (defun comint-redirect-results-list-from-process (process command regexp regexp-group)
3771 "Send COMMAND to PROCESS.
3772 Return a list of expressions in the output which match REGEXP.
3773 REGEXP-GROUP is the regular expression group in REGEXP to use."
3774 (let ((output-buffer " *Comint Redirect Work Buffer*")
3775 results)
3776 (with-current-buffer (get-buffer-create output-buffer)
3777 (erase-buffer)
3778 (comint-redirect-send-command-to-process command
3779 output-buffer process nil t)
3780 ;; Wait for the process to complete
3781 (set-buffer (process-buffer process))
3782 (while (and (null comint-redirect-completed)
3783 (accept-process-output process)))
3784 ;; Collect the output
3785 (set-buffer output-buffer)
3786 (goto-char (point-min))
3787 ;; Skip past the command, if it was echoed
3788 (and (looking-at command)
3789 (forward-line))
3790 (while (and (not (eobp))
3791 (re-search-forward regexp nil t))
3792 (push (buffer-substring-no-properties
3793 (match-beginning regexp-group)
3794 (match-end regexp-group))
3795 results))
3796 (nreverse results))))
3797 \f
3798 ;; Converting process modes to use comint mode
3799 ;; ===========================================================================
3800 ;; The code in the Emacs 19 distribution has all been modified to use comint
3801 ;; where needed. However, there are `third-party' packages out there that
3802 ;; still use the old shell mode. Here's a guide to conversion.
3803 ;;
3804 ;; Renaming variables
3805 ;; Most of the work is renaming variables and functions. These are the common
3806 ;; ones:
3807 ;; Local variables:
3808 ;; last-input-start comint-last-input-start
3809 ;; last-input-end comint-last-input-end
3810 ;; shell-prompt-pattern comint-prompt-regexp
3811 ;; shell-set-directory-error-hook <no equivalent>
3812 ;; Miscellaneous:
3813 ;; shell-set-directory <unnecessary>
3814 ;; shell-mode-map comint-mode-map
3815 ;; Commands:
3816 ;; shell-send-input comint-send-input
3817 ;; shell-send-eof comint-delchar-or-maybe-eof
3818 ;; kill-shell-input comint-kill-input
3819 ;; interrupt-shell-subjob comint-interrupt-subjob
3820 ;; stop-shell-subjob comint-stop-subjob
3821 ;; quit-shell-subjob comint-quit-subjob
3822 ;; kill-shell-subjob comint-kill-subjob
3823 ;; kill-output-from-shell comint-delete-output
3824 ;; show-output-from-shell comint-show-output
3825 ;; copy-last-shell-input Use comint-previous-input/comint-next-input
3826 ;;
3827 ;; SHELL-SET-DIRECTORY is gone, its functionality taken over by
3828 ;; SHELL-DIRECTORY-TRACKER, the shell mode's comint-input-filter-functions.
3829 ;; Comint mode does not provide functionality equivalent to
3830 ;; shell-set-directory-error-hook; it is gone.
3831 ;;
3832 ;; comint-last-input-start is provided for modes which want to munge
3833 ;; the buffer after input is sent, perhaps because the inferior
3834 ;; insists on echoing the input. The LAST-INPUT-START variable in
3835 ;; the old shell package was used to implement a history mechanism,
3836 ;; but you should think twice before using comint-last-input-start
3837 ;; for this; the input history ring often does the job better.
3838 ;;
3839 ;; If you are implementing some process-in-a-buffer mode, called foo-mode, do
3840 ;; *not* create the comint-mode local variables in your foo-mode function.
3841 ;; This is not modular. Instead, call comint-mode, and let *it* create the
3842 ;; necessary comint-specific local variables. Then create the
3843 ;; foo-mode-specific local variables in foo-mode. Set the buffer's keymap to
3844 ;; be foo-mode-map, and its mode to be foo-mode. Set the comint-mode hooks
3845 ;; (comint-{prompt-regexp, input-filter, input-filter-functions,
3846 ;; get-old-input) that need to be different from the defaults. Call
3847 ;; foo-mode-hook, and you're done. Don't run the comint-mode hook yourself;
3848 ;; comint-mode will take care of it. The following example, from shell.el,
3849 ;; is typical:
3850 ;;
3851 ;; (defvar shell-mode-map
3852 ;; (let ((map (make-sparse-keymap)))
3853 ;; (set-keymap-parent map comint-mode-map)
3854 ;; (define-key map "\C-c\C-f" 'shell-forward-command)
3855 ;; (define-key map "\C-c\C-b" 'shell-backward-command)
3857 ;; (define-key map "\M-?"
3858 ;; 'comint-dynamic-list-filename-completions)
3859 ;; map))
3860 ;;
3861 ;; (define-derived-mode shell-mode comint-mode "Shell"
3862 ;; "Doc."
3863 ;; (setq comint-prompt-regexp shell-prompt-pattern)
3864 ;; (setq-local shell-directory-stack nil)
3865 ;; (add-hook 'comint-input-filter-functions 'shell-directory-tracker))
3866 ;;
3867 ;;
3868 ;; Completion for comint-mode users
3869 ;;
3870 ;; For modes that use comint-mode, comint-dynamic-complete-functions is the
3871 ;; hook to add completion functions to. Functions on this list should return
3872 ;; the completion data according to the documentation of
3873 ;; `completion-at-point-functions'
3874 \f
3876 (provide 'comint)
3878 ;;; comint.el ends here