| blob | 64ed32dd2b370b3e3a63ee36650339707232f19b |
1 ;;; comint.el --- general command interpreter in a window stuff
3 ;; Copyright (C) 1988, 1990, 1992-2011 Free Software Foundation, Inc.
5 ;; Author: Olin Shivers <shivers@cs.cmu.edu>
6 ;; Simon Marshall <simon@gnu.org>
7 ;; Maintainer: FSF
8 ;; Keywords: processes
9 ;; Package: emacs
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software: you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation, either version 3 of the License, or
16 ;; (at your option) any later version.
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;;; Commentary:
28 ;; This file defines a general command-interpreter-in-a-buffer package
29 ;; (comint mode). The idea is that you can build specific process-in-a-buffer
30 ;; modes on top of comint mode -- e.g., Lisp, shell, scheme, T, soar, ....
31 ;; This way, all these specific packages share a common base functionality,
32 ;; and a common set of bindings, which makes them easier to use (and
33 ;; saves code, implementation time, etc., etc.).
35 ;; Several packages are already defined using comint mode:
36 ;; - shell.el defines a shell-in-a-buffer mode.
37 ;; - cmulisp.el defines a simple lisp-in-a-buffer mode.
38 ;;
39 ;; - The file cmuscheme.el defines a scheme-in-a-buffer mode.
40 ;; - The file tea.el tunes scheme and inferior-scheme modes for T.
41 ;; - The file soar.el tunes Lisp and inferior-lisp modes for Soar.
42 ;; - cmutex.el defines TeX and LaTeX modes that invoke TeX, LaTeX, BibTeX,
43 ;; previewers, and printers from within Emacs.
44 ;; - background.el allows csh-like job control inside Emacs.
45 ;; It is pretty easy to make new derived modes for other processes.
47 ;; For documentation on the functionality provided by Comint mode, and
48 ;; the hooks available for customising 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:
105 \f
106 ;; Buffer Local Variables:
107 ;;============================================================================
108 ;; Comint mode buffer local variables:
109 ;; comint-prompt-regexp string comint-bol uses to match prompt
110 ;; comint-delimiter-argument-list list For delimiters and arguments
111 ;; comint-last-input-start marker Handy if inferior always echoes
112 ;; comint-last-input-end marker For comint-delete-output command
113 ;; comint-input-ring-size integer For the input history
114 ;; comint-input-ring ring mechanism
115 ;; comint-input-ring-index number ...
116 ;; comint-save-input-ring-index number ...
117 ;; comint-input-autoexpand symbol ...
118 ;; comint-input-ignoredups boolean ...
119 ;; comint-dynamic-complete-functions hook For the completion mechanism
120 ;; comint-completion-fignore list ...
121 ;; comint-file-name-chars string ...
122 ;; comint-file-name-quote-list list ...
123 ;; comint-get-old-input function Hooks for specific
124 ;; comint-input-filter-functions hook process-in-a-buffer
125 ;; comint-output-filter-functions hook function modes.
126 ;; comint-preoutput-filter-functions hook
127 ;; comint-input-filter function ...
128 ;; comint-input-sender function ...
129 ;; comint-eol-on-send boolean ...
130 ;; comint-process-echoes boolean ...
131 ;; comint-scroll-to-bottom-on-input symbol For scroll behavior
132 ;; comint-move-point-for-output symbol ...
133 ;; comint-scroll-show-maximum-output boolean ...
134 ;; comint-accum-marker maker For comint-accumulate
135 ;;
136 ;; Comint mode non-buffer local variables:
137 ;; comint-completion-addsuffix boolean/cons For file name
138 ;; comint-completion-autolist boolean completion behavior
139 ;; comint-completion-recexact boolean ...
142 "General command interpreter in a window stuff."
146 "Completion facilities in comint."
150 "Source finding facilities in comint."
155 "Regexp to recognize prompts in the inferior process.
158 This variable is only used if the variable
159 `comint-use-prompt-regexp' is non-nil.
161 Good choices:
172 "If non-nil, the comint prompt is read only.
173 The read only region includes the newline before the prompt.
174 This does not affect existing prompts.
175 Certain derived modes may override this option.
177 If you set this option to t, then the safe way to temporarily
178 override the read-only-ness of comint prompts is to call
179 `comint-kill-whole-line' or `comint-kill-region' with no
180 narrowing in effect. This way you will be certain that none of
181 the remaining prompts will be accidentally messed up. You may
182 wish to put something like the following in your `.emacs' file:
184 \(add-hook 'comint-mode-hook
185 (lambda ()
187 (define-key comint-mode-map [C-S-backspace]
188 'comint-kill-whole-line)))
190 If you sometimes use comint-mode on text-only terminals or with `emacs -nw',
191 you might wish to use another binding for `comint-kill-whole-line'."
197 "List of characters to recognize as separate arguments in input.
198 Strings comprising a character in this list will separate the arguments
199 surrounding them, and also be regarded as arguments in their own right (unlike
200 whitespace). See `comint-arguments'.
201 Defaults to the empty list.
208 "If non-nil, expand input command history references on completion.
209 This mirrors the optional behavior of tcsh (its autoexpand and histlist).
211 If the value is `input', then the expansion is seen on input.
212 If the value is `history', then the expansion is only when inserting
213 into the buffer's input ring. See also `comint-magic-space' and
214 `comint-dynamic-complete'.
216 This variable is buffer-local."
224 "Face to use to highlight user input."
229 "Face to use to highlight prompts."
233 "If non-nil, don't add input matching the last on the input ring.
234 This mirrors the optional behavior of bash.
236 This variable is buffer-local."
241 "If non-nil, name of the file to read/write input history.
242 See also `comint-read-input-ring' and `comint-write-input-ring'.
243 `comint-mode' makes this a buffer-local variable. You probably want
244 to set this in a mode hook, rather than customize the default value."
246 file)
250 "Controls whether input to interpreter causes window to scroll.
251 If nil, then do not scroll. If t or `all', scroll all windows showing buffer.
252 If `this', scroll only the selected window.
254 The default is nil.
256 See `comint-preinput-scroll-to-bottom'. This variable is buffer-local."
264 "Controls whether interpreter output moves point to the end of the output.
265 If nil, then output never moves point to the output.
266 (If the output occurs at point, it is inserted before point.)
267 If t or `all', move point in all windows showing the buffer.
268 If `this', move point only the selected window.
269 If `others', move point only in other windows, not in the selected window.
271 The default is nil.
273 See the variable `comint-scroll-show-maximum-output' and the function
274 `comint-postoutput-scroll-to-bottom'.
275 This variable is buffer-local in all Comint buffers."
286 "Controls how to scroll due to interpreter output.
287 This variable applies when point is at the end of the buffer
288 \(either because it was originally there, or because
289 `comint-move-point-for-output' said to move it there)
290 and output from the subprocess is inserted.
292 Non-nil means scroll so that the window is full of text
293 and point is on the last line. A value of nil
294 means don't do anything special--scroll normally.
296 See also the variable `comint-move-point-for-output' and the function
297 `comint-postoutput-scroll-to-bottom'.
298 This variable is buffer-local in all Comint buffers."
303 "The maximum size in lines for Comint buffers.
304 Comint buffers are truncated from the top to be no greater than this number, if
305 the function `comint-truncate-buffer' is on `comint-output-filter-functions'."
310 "Size of the input history ring in `comint-mode'."
322 "If non-nil, assume that the subprocess echoes any input.
323 If so, delete one copy of the input so that only one copy eventually
324 appears in the buffer.
326 This variable is buffer-local."
330 ;; AIX puts the name of the person being su'd to in front of the prompt.
331 ;; kinit prints a prompt like `Password for devnull@GNU.ORG: '.
332 ;; ksu prints a prompt like `Kerberos password for devnull/root@GNU.ORG: '.
333 ;; ssh-add prints a prompt like `Enter passphrase: '.
334 ;; plink prints a prompt like `Passphrase for key "root@GNU.ORG": '.
335 ;; Ubuntu's sudo prompts like `[sudo] password for user:'
336 ;; Some implementations of passwd use "Password (again)" as the 2nd prompt.
337 ;; Something called "perforce" uses "Enter password:".
338 ;; See M-x comint-testsuite--test-comint-password-prompt-regexp.
352 "Regexp matching prompts for passwords in the inferior process.
353 This is used by `comint-watch-for-password-prompt'."
358 ;; Here are the per-interpreter hooks.
360 "Function that returns old text in Comint mode.
361 This function is called when return is typed while the point is in old
362 text. It returns the text to be submitted as process input. The
363 default is `comint-get-old-input-default', which either grabs the
364 current input field or grabs the current line and strips off leading
365 text matching `comint-prompt-regexp', depending on the value of
370 "List of functions called to perform completion.
371 Works like `completion-at-point-functions'.
372 See also `comint-dynamic-complete'.
378 "Predicate for filtering additions to input history.
379 Takes one argument, the input. If non-nil, the input may be saved on the input
383 "Abnormal hook run before input is sent to the process.
386 ;;;###autoload
387 (defvar comint-output-filter-functions '(comint-postoutput-scroll-to-bottom comint-watch-for-password-prompt)
388 "Functions to call after output is inserted into the buffer.
389 One possible function is `comint-postoutput-scroll-to-bottom'.
390 These functions get one argument, a string containing the text as originally
391 inserted. Note that this might not be the same as the buffer contents between
392 `comint-last-output-start' and the buffer's `process-mark', if other filter
393 functions have already modified the buffer.
395 See also `comint-preoutput-filter-functions'.
397 You can use `add-hook' to add functions to this list
404 "Function to actually send to PROCESS the STRING submitted by user.
405 Usually this is just `comint-simple-send', but if your mode needs to
406 massage the input string, put a different function here.
407 `comint-simple-send' just sends the string plus a newline.
408 \(If `comint-input-sender-no-newline' is non-nil, it omits the newline.)
412 "Non-nil means go to the end of the line before sending input.
413 See `comint-send-input'."
420 ;; Note: If it is decided to purge comint-prompt-regexp from the source
421 ;; entirely, searching for uses of this variable will help to identify
422 ;; places that need attention.
424 "If non-nil, use `comint-prompt-regexp' to recognize prompts.
425 If nil, then program output and user-input are given different `field'
426 properties, which Emacs commands can use to distinguish them (in
427 particular, common movement commands such as `beginning-of-line'
428 respect field boundaries in a natural way)."
433 "Hook run upon entry to `comint-mode'.
434 This is run before the process is cranked up."
439 "Hook run each time a process is exec'd by `comint-exec'.
440 This is called after the process is cranked up. It is useful for things that
441 must be done each time a process is executed in a Comint mode buffer (e.g.,
442 `(process-kill-without-query)'). In contrast, the `comint-mode-hook' is only
443 executed once when the buffer is created."
449 ;; Keys:
460 ;; The following two are standardly aliased to C-d,
461 ;; but they should never do EOF, just delete.
463 (define-key map [kp-delete] 'delete-char)
464 (define-key map "\C-c " 'comint-accumulate)
465 (define-key map "\C-c\C-x" 'comint-get-next-from-history)
466 (define-key map "\C-c\C-a" 'comint-bol-or-process-mark)
467 (define-key map "\C-c\C-u" 'comint-kill-input)
468 (define-key map "\C-c\C-w" 'backward-kill-word)
469 (define-key map "\C-c\C-c" 'comint-interrupt-subjob)
470 (define-key map "\C-c\C-z" 'comint-stop-subjob)
472 (define-key map "\C-c\C-m" 'comint-copy-old-input)
473 (define-key map "\C-c\C-o" 'comint-delete-output)
474 (define-key map "\C-c\C-r" 'comint-show-output)
475 (define-key map "\C-c\C-e" 'comint-show-maximum-output)
476 (define-key map "\C-c\C-l" 'comint-dynamic-list-input-ring)
477 (define-key map "\C-c\C-n" 'comint-next-prompt)
478 (define-key map "\C-c\C-p" 'comint-previous-prompt)
479 (define-key map "\C-c\C-d" 'comint-send-eof)
480 (define-key map "\C-c\C-s" 'comint-write-output)
481 (define-key map "\C-c." 'comint-insert-previous-argument)
482 ;; Mouse Buttons:
483 (define-key map [mouse-2] 'comint-insert-input)
484 ;; Menu bars:
485 ;; completion:
486 (define-key map [menu-bar completion]
487 (cons "Complete" (make-sparse-keymap "Complete")))
488 (define-key map [menu-bar completion complete-expand]
489 '("Expand File Name" . comint-replace-by-expanded-filename))
490 (define-key map [menu-bar completion complete-listing]
491 '("File Completion Listing" . comint-dynamic-list-filename-completions))
492 (define-key map [menu-bar completion complete-file]
493 '("Complete File Name" . comint-dynamic-complete-filename))
494 (define-key map [menu-bar completion complete]
495 '("Complete Before Point" . comint-dynamic-complete))
496 ;; Input history:
497 (define-key map [menu-bar inout]
498 (cons "In/Out" (make-sparse-keymap "In/Out")))
499 (define-key map [menu-bar inout delete-output]
500 '("Delete Current Output Group" . comint-delete-output))
501 (define-key map [menu-bar inout append-output-to-file]
502 '("Append Current Output Group to File" . comint-append-output-to-file))
503 (define-key map [menu-bar inout write-output]
504 '("Write Current Output Group to File" . comint-write-output))
505 (define-key map [menu-bar inout next-prompt]
506 '("Forward Output Group" . comint-next-prompt))
507 (define-key map [menu-bar inout previous-prompt]
508 '("Backward Output Group" . comint-previous-prompt))
509 (define-key map [menu-bar inout show-maximum-output]
510 '("Show Maximum Output" . comint-show-maximum-output))
511 (define-key map [menu-bar inout show-output]
512 '("Show Current Output Group" . comint-show-output))
513 (define-key map [menu-bar inout kill-input]
514 '("Kill Current Input" . comint-kill-input))
515 (define-key map [menu-bar inout copy-input]
516 '("Copy Old Input" . comint-copy-old-input))
517 (define-key map [menu-bar inout history-isearch-backward-regexp]
518 '("Isearch Input Regexp Backward..." . comint-history-isearch-backward-regexp))
519 (define-key map [menu-bar inout history-isearch-backward]
520 '("Isearch Input String Backward..." . comint-history-isearch-backward))
521 (define-key map [menu-bar inout forward-matching-history]
522 '("Forward Matching Input..." . comint-forward-matching-input))
523 (define-key map [menu-bar inout backward-matching-history]
524 '("Backward Matching Input..." . comint-backward-matching-input))
525 (define-key map [menu-bar inout next-matching-history]
526 '("Next Matching Input..." . comint-next-matching-input))
527 (define-key map [menu-bar inout previous-matching-history]
528 '("Previous Matching Input..." . comint-previous-matching-input))
529 (define-key map [menu-bar inout next-matching-history-from-input]
530 '("Next Matching Current Input" . comint-next-matching-input-from-input))
531 (define-key map [menu-bar inout previous-matching-history-from-input]
532 '("Previous Matching Current Input" . comint-previous-matching-input-from-input))
533 (define-key map [menu-bar inout next-history]
534 '("Next Input" . comint-next-input))
535 (define-key map [menu-bar inout previous-history]
536 '("Previous Input" . comint-previous-input))
537 (define-key map [menu-bar inout list-history]
538 '("List Input History" . comint-dynamic-list-input-ring))
539 (define-key map [menu-bar inout expand-history]
540 '("Expand History Before Point" . comint-replace-by-expanded-history))
541 ;; Signals
542 (let ((signals-map (make-sparse-keymap "Signals")))
543 (define-key map [menu-bar signals] (cons "Signals" signals-map))
544 (define-key signals-map [eof] '("EOF" . comint-send-eof))
545 (define-key signals-map [kill] '("KILL" . comint-kill-subjob))
546 (define-key signals-map [quit] '("QUIT" . comint-quit-subjob))
547 (define-key signals-map [cont] '("CONT" . comint-continue-subjob))
548 (define-key signals-map [stop] '("STOP" . comint-stop-subjob))
549 (define-key signals-map [break] '("BREAK" . comint-interrupt-subjob)))
550 ;; Put them in the menu bar:
551 (setq menu-bar-final-items (append '(completion inout signals)
552 menu-bar-final-items))
553 map))
555 ;; Fixme: Is this still relevant?
556 (defvar comint-ptyp t
557 "Non-nil if communications via pty; false if by pipe. Buffer local.
558 This is to work around a bug in Emacs process signaling.")
560 (defvar comint-input-ring nil)
561 (defvar comint-last-input-start nil)
562 (defvar comint-last-input-end nil)
563 (defvar comint-last-output-start nil)
564 (defvar comint-input-ring-index nil
565 "Index of last matched history element.")
566 (defvar comint-matching-input-from-input-string ""
567 "Input previously used to match input history.")
568 (defvar comint-save-input-ring-index nil
569 "Last input ring index which you copied.
572 (defvar comint-accum-marker nil
573 "Non-nil if you are accumulating input lines to send as input together.
576 (defvar comint-stored-incomplete-input nil
577 "Stored input for history cycling.")
579 (put 'comint-replace-by-expanded-history 'menu-enable 'comint-input-autoexpand)
580 (put 'comint-input-ring 'permanent-local t)
581 (put 'comint-input-ring-index 'permanent-local t)
582 (put 'comint-save-input-ring-index 'permanent-local t)
583 (put 'comint-input-autoexpand 'permanent-local t)
584 (put 'comint-input-filter-functions 'permanent-local t)
585 (put 'comint-output-filter-functions 'permanent-local t)
586 (put 'comint-preoutput-filter-functions 'permanent-local t)
587 (put 'comint-scroll-to-bottom-on-input 'permanent-local t)
588 (put 'comint-move-point-for-output 'permanent-local t)
589 (put 'comint-scroll-show-maximum-output 'permanent-local t)
590 (put 'comint-ptyp 'permanent-local t)
592 (put 'comint-mode 'mode-class 'special)
594 (define-derived-mode comint-mode fundamental-mode "Comint"
595 "Major mode for interacting with an inferior interpreter.
596 Interpreter name is same as buffer name, sans the asterisks.
597 Return at end of buffer sends line as input.
598 Return not at end copies rest of line to end and sends it.
599 Setting variable `comint-eol-on-send' means jump to the end of the line
600 before submitting new input.
602 This mode is customized to create major modes such as Inferior Lisp
603 mode, Shell mode, etc. This can be done by setting the hooks
604 `comint-input-filter-functions', `comint-input-filter', `comint-input-sender'
605 and `comint-get-old-input' to appropriate functions, and the variable
606 `comint-prompt-regexp' to the appropriate regular expression.
608 The mode maintains an input history of size `comint-input-ring-size'.
611 Input ring history expansion can be achieved with the commands
613 Input ring expansion is controlled by the variable `comint-input-autoexpand',
614 and addition is controlled by the variable `comint-input-ignoredups'.
616 Commands with no default key bindings include `send-invisible',
617 `comint-dynamic-complete', `comint-dynamic-list-filename-completions', and
618 `comint-magic-space'.
620 Input to, and output from, the subprocess can cause the window to scroll to
621 the end of the buffer. See variables `comint-output-filter-functions',
622 `comint-preoutput-filter-functions', `comint-scroll-to-bottom-on-input',
623 and `comint-move-point-for-output'.
626 to continue it.
630 Entry to this mode runs the hooks on `comint-mode-hook'."
631 (setq mode-line-process '(":%s"))
632 (set (make-local-variable 'window-point-insertion-type) t)
633 (set (make-local-variable 'comint-last-input-start) (point-min-marker))
634 (set (make-local-variable 'comint-last-input-end) (point-min-marker))
635 (set (make-local-variable 'comint-last-output-start) (make-marker))
636 (make-local-variable 'comint-last-prompt-overlay)
637 (make-local-variable 'comint-prompt-regexp) ; Don't set; default
638 (make-local-variable 'comint-input-ring-size) ; ...to global val.
639 (make-local-variable 'comint-input-ring)
640 (make-local-variable 'comint-input-ring-file-name)
641 (or (and (boundp 'comint-input-ring) comint-input-ring)
642 (setq comint-input-ring (make-ring comint-input-ring-size)))
643 (make-local-variable 'comint-input-ring-index)
644 (make-local-variable 'comint-save-input-ring-index)
645 (or (and (boundp 'comint-input-ring-index) comint-input-ring-index)
646 (setq comint-input-ring-index nil))
647 (or (and (boundp 'comint-save-input-ring-index) comint-save-input-ring-index)
648 (setq comint-save-input-ring-index nil))
649 (make-local-variable 'comint-matching-input-from-input-string)
650 (make-local-variable 'comint-input-autoexpand)
651 (make-local-variable 'comint-input-ignoredups)
652 (make-local-variable 'comint-delimiter-argument-list)
653 (make-local-variable 'comint-completion-fignore)
654 (make-local-variable 'comint-get-old-input)
655 (make-local-variable 'comint-input-filter)
656 (make-local-variable 'comint-input-sender)
657 (make-local-variable 'comint-eol-on-send)
658 (make-local-variable 'comint-scroll-to-bottom-on-input)
659 (make-local-variable 'comint-move-point-for-output)
660 (make-local-variable 'comint-scroll-show-maximum-output)
661 (make-local-variable 'comint-stored-incomplete-input)
662 ;; Following disabled because it seems to break the case when
663 ;; comint-scroll-show-maximum-output is nil, and no-one can remember
664 ;; what the original problem was. If there are problems with point
665 ;; not going to the end, consider re-enabling this.
666 ;; http://lists.gnu.org/archive/html/emacs-devel/2007-08/msg00827.html
667 ;;
668 ;; This makes it really work to keep point at the bottom.
669 ;; (make-local-variable 'scroll-conservatively)
670 ;; (setq scroll-conservatively 10000)
671 (add-hook 'pre-command-hook 'comint-preinput-scroll-to-bottom t t)
672 (make-local-variable 'comint-ptyp)
673 (make-local-variable 'comint-process-echoes)
674 (make-local-variable 'comint-file-name-chars)
675 (make-local-variable 'comint-file-name-quote-list)
676 ;; dir tracking on remote files
677 (set (make-local-variable 'comint-file-name-prefix)
678 (or (file-remote-p default-directory) ""))
679 (make-local-variable 'comint-accum-marker)
680 (setq comint-accum-marker (make-marker))
681 (make-local-variable 'font-lock-defaults)
682 (setq font-lock-defaults '(nil t))
683 (add-hook 'change-major-mode-hook 'font-lock-defontify nil t)
684 (add-hook 'isearch-mode-hook 'comint-history-isearch-setup nil t)
685 ;; This behavior is not useful in comint buffers, and is annoying
686 (set (make-local-variable 'next-line-add-newlines) nil))
688 (defun comint-check-proc (buffer)
689 "Return non-nil if there is a living process associated w/buffer BUFFER.
690 Living means the status is `open', `run', or `stop'.
691 BUFFER can be either a buffer or the name of one."
692 (let ((proc (get-buffer-process buffer)))
693 (and proc (memq (process-status proc) '(open run stop)))))
695 ;;;###autoload
696 (defun make-comint-in-buffer (name buffer program &optional startfile &rest switches)
697 "Make a Comint process NAME in BUFFER, running PROGRAM.
698 If BUFFER is nil, it defaults to NAME surrounded by `*'s.
699 PROGRAM should be either a string denoting an executable program to create
700 via `start-file-process', or a cons pair of the form (HOST . SERVICE) denoting
701 a TCP connection to be opened via `open-network-stream'. If there is already
702 a running process in that buffer, it is not restarted. Optional fourth arg
703 STARTFILE is the name of a file, whose contents are sent to the
704 process as its initial input.
706 If PROGRAM is a string, any more args are arguments to PROGRAM.
708 Returns the (possibly newly created) process buffer."
709 (or (fboundp 'start-file-process)
710 (error "Multi-processing is not supported for this system"))
711 (setq buffer (get-buffer-create (or buffer (concat "*" name "*"))))
712 ;; If no process, or nuked process, crank up a new one and put buffer in
713 ;; comint mode. Otherwise, leave buffer and existing process alone.
714 (unless (comint-check-proc buffer)
715 (with-current-buffer buffer
716 (unless (derived-mode-p 'comint-mode)
717 (comint-mode))) ; Install local vars, mode, keymap, ...
718 (comint-exec buffer name program startfile switches))
719 buffer)
721 ;;;###autoload
722 (defun make-comint (name program &optional startfile &rest switches)
723 "Make a Comint process NAME in a buffer, running PROGRAM.
724 The name of the buffer is made by surrounding NAME with `*'s.
725 PROGRAM should be either a string denoting an executable program to create
726 via `start-file-process', or a cons pair of the form (HOST . SERVICE) denoting
727 a TCP connection to be opened via `open-network-stream'. If there is already
728 a running process in that buffer, it is not restarted. Optional third arg
729 STARTFILE is the name of a file, whose contents are sent to the
730 process as its initial input.
732 If PROGRAM is a string, any more args are arguments to PROGRAM.
734 Returns the (possibly newly created) process buffer."
735 (apply #'make-comint-in-buffer name nil program startfile switches))
737 ;;;###autoload
738 (defun comint-run (program)
739 "Run PROGRAM in a Comint buffer and switch to it.
740 The buffer name is made by surrounding the file name of PROGRAM with `*'s.
741 The file name is used to make a symbol name, such as `comint-sh-hook', and any
742 hooks on this symbol are run in the buffer.
743 See `make-comint' and `comint-exec'."
744 (interactive "sRun program: ")
745 (let ((name (file-name-nondirectory program)))
746 (switch-to-buffer (make-comint name program))
747 (run-hooks (intern-soft (concat "comint-" name "-hook")))))
749 (defun comint-exec (buffer name command startfile switches)
750 "Start up a process named NAME in buffer BUFFER for Comint modes.
751 Runs the given COMMAND with SWITCHES, and initial input from STARTFILE.
752 Blasts any old process running in the buffer. Doesn't set the buffer mode.
753 You can use this to cheaply run a series of processes in the same Comint
754 buffer. The hook `comint-exec-hook' is run after each exec."
755 (with-current-buffer buffer
756 (let ((proc (get-buffer-process buffer))) ; Blast any old process.
757 (if proc (delete-process proc)))
758 ;; Crank up a new process
759 (let ((proc
760 (if (consp command)
761 (open-network-stream name buffer (car command) (cdr command))
762 (comint-exec-1 name buffer command switches))))
763 (set-process-filter proc 'comint-output-filter)
764 (make-local-variable 'comint-ptyp)
765 (setq comint-ptyp process-connection-type) ; t if pty, nil if pipe.
766 ;; Jump to the end, and set the process mark.
767 (goto-char (point-max))
768 (set-marker (process-mark proc) (point))
769 ;; Feed it the startfile.
770 (cond (startfile
771 ;;This is guaranteed to wait long enough
772 ;;but has bad results if the comint does not prompt at all
773 ;; (while (= size (buffer-size))
774 ;; (sleep-for 1))
775 ;;I hope 1 second is enough!
776 (sleep-for 1)
777 (goto-char (point-max))
778 (insert-file-contents startfile)
779 (setq startfile (buffer-substring (point) (point-max)))
780 (delete-region (point) (point-max))
781 (comint-send-string proc startfile)))
782 (run-hooks 'comint-exec-hook)
783 buffer)))
785 ;; This auxiliary function cranks up the process for comint-exec in
786 ;; the appropriate environment.
788 (defun comint-exec-1 (name buffer command switches)
789 (let ((process-environment
790 (nconc
791 ;; If using termcap, we specify `emacs' as the terminal type
792 ;; because that lets us specify a width.
793 ;; If using terminfo, we specify `dumb' because that is
794 ;; a defined terminal type. `emacs' is not a defined terminal type
795 ;; and there is no way for us to define it here.
796 ;; Some programs that use terminfo get very confused
797 ;; if TERM is not a valid terminal type.
798 ;; ;; There is similar code in compile.el.
799 (if (and (boundp 'system-uses-terminfo) system-uses-terminfo)
800 (list "TERM=dumb" "TERMCAP="
801 (format "COLUMNS=%d" (window-width)))
802 (list "TERM=emacs"
803 (format "TERMCAP=emacs:co#%d:tc=unknown:" (window-width))))
804 (unless (getenv "EMACS")
805 (list "EMACS=t"))
806 (list (format "INSIDE_EMACS=%s,comint" emacs-version))
807 process-environment))
808 (default-directory
809 (if (file-accessible-directory-p default-directory)
810 default-directory
811 "/"))
812 proc decoding encoding changed)
813 (let ((exec-path (if (and command (file-name-directory command))
814 ;; If the command has slashes, make sure we
815 ;; first look relative to the current directory.
816 (cons default-directory exec-path) exec-path)))
817 (setq proc (apply 'start-file-process name buffer command switches)))
818 ;; Some file name handler cannot start a process, fe ange-ftp.
819 (unless (processp proc) (error "No process started"))
820 (let ((coding-systems (process-coding-system proc)))
821 (setq decoding (car coding-systems)
822 encoding (cdr coding-systems)))
823 ;; Even if start-file-process left the coding system for encoding data
824 ;; sent from the process undecided, we had better use the same one
825 ;; as what we use for decoding. But, we should suppress EOL
826 ;; conversion.
827 (if (and decoding (not encoding))
828 (setq encoding (coding-system-change-eol-conversion decoding 'unix)
829 changed t))
830 (if changed
831 (set-process-coding-system proc decoding encoding))
832 proc))
834 (defun comint-insert-input (event)
835 "In a Comint buffer, set the current input to the previous input at point.
836 If there is no previous input at point, run the command specified
837 by the global keymap (usually `mouse-yank-at-click')."
838 (interactive "e")
839 ;; Don't set the mouse here, since it may otherwise change the behavior
840 ;; of the command on which we fallback if there's no field at point.
841 ;; (mouse-set-point event)
842 (let ((pos (posn-point (event-end event)))
843 field input)
844 (with-selected-window (posn-window (event-end event))
845 ;; If pos is at the very end of a field, the mouse-click was
846 ;; probably outside (to the right) of the field.
847 (and (< pos (field-end pos))
848 (setq field (field-at-pos pos))
849 (setq input (field-string-no-properties pos))))
850 (if (or (null comint-accum-marker)
851 (not (eq field 'input)))
852 ;; Fall back to the global definition if (i) the selected
853 ;; buffer is not a comint buffer (which can happen if a
854 ;; non-comint window was selected and we clicked in a comint
855 ;; window), or (ii) there is no input at POS.
856 (let* ((keys (this-command-keys))
857 (last-key (and (vectorp keys) (aref keys (1- (length keys)))))
858 (fun (and last-key (lookup-key global-map (vector last-key)))))
859 (and fun (not (eq fun 'comint-insert-input))
860 (call-interactively fun)))
861 (with-selected-window (posn-window (event-end event))
862 ;; Otherwise, insert the previous input.
863 (goto-char (point-max))
864 ;; First delete any old unsent input at the end
865 (delete-region
866 (or (marker-position comint-accum-marker)
867 (process-mark (get-buffer-process (current-buffer))))
868 (point))
869 ;; Insert the input at point
870 (insert input)))))
871 \f
872 ;; Input history processing in a buffer
873 ;; ===========================================================================
874 ;; Useful input history functions, courtesy of the Ergo group.
876 ;; Eleven commands:
877 ;; comint-dynamic-list-input-ring List history in help buffer.
878 ;; comint-previous-input Previous input...
879 ;; comint-previous-matching-input ...matching a string.
880 ;; comint-previous-matching-input-from-input ... matching the current input.
881 ;; comint-next-input Next input...
882 ;; comint-next-matching-input ...matching a string.
883 ;; comint-next-matching-input-from-input ... matching the current input.
884 ;; comint-backward-matching-input Backwards input...
885 ;; comint-forward-matching-input ...matching a string.
886 ;; comint-replace-by-expanded-history Expand history at point;
887 ;; replace with expanded history.
888 ;; comint-magic-space Expand history and insert space.
889 ;;
890 ;; Three functions:
891 ;; comint-read-input-ring Read into comint-input-ring...
892 ;; comint-write-input-ring Write to comint-input-ring-file-name.
893 ;; comint-replace-by-expanded-history-before-point Workhorse function.
895 (defun comint-read-input-ring (&optional silent)
896 "Set the buffer's `comint-input-ring' from a history file.
897 The name of the file is given by the variable `comint-input-ring-file-name'.
898 The history ring is of size `comint-input-ring-size', regardless of file size.
899 If `comint-input-ring-file-name' is nil this function does nothing.
901 If the optional argument SILENT is non-nil, we say nothing about a
902 failure to read the history file.
904 This function is useful for major mode commands and mode hooks.
906 The commands stored in the history file are separated by the
907 `comint-input-ring-separator', and entries that match
908 `comint-input-history-ignore' are ignored. The most recent command
909 comes last.
911 See also `comint-input-ignoredups' and `comint-write-input-ring'."
912 (cond ((or (null comint-input-ring-file-name)
913 (equal comint-input-ring-file-name ""))
914 nil)
915 ((not (file-readable-p comint-input-ring-file-name))
916 (or silent
917 (message "Cannot read history file %s"
918 comint-input-ring-file-name)))
919 (t
920 (let* ((file comint-input-ring-file-name)
921 (count 0)
922 (size comint-input-ring-size)
923 (ring (make-ring size)))
924 (with-temp-buffer
925 (insert-file-contents file)
926 ;; Save restriction in case file is already visited...
927 ;; Watch for those date stamps in history files!
928 (goto-char (point-max))
929 (let (start end history)
930 (while (and (< count size)
931 (re-search-backward comint-input-ring-separator
932 nil t)
933 (setq end (match-beginning 0)))
934 (setq start
935 (if (re-search-backward comint-input-ring-separator
936 nil t)
937 (match-end 0)
938 (point-min)))
939 (setq history (buffer-substring start end))
940 (goto-char start)
941 (if (and (not (string-match comint-input-history-ignore
942 history))
943 (or (null comint-input-ignoredups)
944 (ring-empty-p ring)
945 (not (string-equal (ring-ref ring 0)
946 history))))
947 (progn
948 (ring-insert-at-beginning ring history)
949 (setq count (1+ count)))))))
950 (setq comint-input-ring ring
951 comint-input-ring-index nil)))))
953 (defun comint-write-input-ring ()
954 "Writes the buffer's `comint-input-ring' to a history file.
955 The name of the file is given by the variable `comint-input-ring-file-name'.
956 The original contents of the file are lost if `comint-input-ring' is not empty.
957 If `comint-input-ring-file-name' is nil this function does nothing.
959 Useful within process sentinels.
961 See also `comint-read-input-ring'."
962 (cond ((or (null comint-input-ring-file-name)
963 (equal comint-input-ring-file-name "")
964 (null comint-input-ring) (ring-empty-p comint-input-ring))
965 nil)
966 ((not (file-writable-p comint-input-ring-file-name))
967 (message "Cannot write history file %s" comint-input-ring-file-name))
968 (t
969 (let* ((history-buf (get-buffer-create " *Temp Input History*"))
970 (ring comint-input-ring)
971 (file comint-input-ring-file-name)
972 (index (ring-length ring)))
973 ;; Write it all out into a buffer first. Much faster, but messier,
974 ;; than writing it one line at a time.
975 (with-current-buffer history-buf
976 (erase-buffer)
977 (while (> index 0)
978 (setq index (1- index))
979 (insert (ring-ref ring index) comint-input-ring-separator))
980 (write-region (buffer-string) nil file nil 'no-message)
981 (kill-buffer nil))))))
984 (defvar comint-dynamic-list-input-ring-window-conf)
986 (defun comint-dynamic-list-input-ring-select ()
987 "Choose the input history entry that point is in or next to."
988 (interactive)
989 (let ((buffer completion-reference-buffer)
990 beg end completion)
991 (if (and (not (eobp)) (get-text-property (point) 'mouse-face))
992 (setq end (point) beg (1+ (point))))
993 (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
994 (setq end (1- (point)) beg (point)))
995 (if (null beg)
996 (error "No history entry here"))
997 (setq beg (previous-single-property-change beg 'mouse-face))
998 (setq end (or (next-single-property-change end 'mouse-face) (point-max)))
999 (setq completion (buffer-substring beg end))
1000 (set-window-configuration comint-dynamic-list-input-ring-window-conf)
1001 (choose-completion-string completion buffer)))
1003 (defun comint-dynamic-list-input-ring ()
1004 "Display a list of recent inputs entered into the current buffer."
1005 (interactive)
1006 (if (or (not (ring-p comint-input-ring))
1007 (ring-empty-p comint-input-ring))
1008 (message "No history")
1009 (let ((history nil)
1010 (history-buffer " *Input History*")
1011 (conf (current-window-configuration)))
1012 ;; We have to build up a list ourselves from the ring vector.
1013 (dotimes (index (ring-length comint-input-ring))
1014 (push (ring-ref comint-input-ring index) history))
1015 ;; Show them most-recent-first.
1016 (setq history (nreverse history))
1017 ;; Change "completion" to "history reference"
1018 ;; to make the display accurate.
1019 (with-output-to-temp-buffer history-buffer
1020 (display-completion-list history)
1021 (set-buffer history-buffer)
1022 (let ((keymap (make-sparse-keymap)))
1023 (set-keymap-parent keymap (current-local-map))
1024 (define-key keymap "\C-m" 'comint-dynamic-list-input-ring-select)
1025 (use-local-map keymap))
1026 (forward-line 3)
1027 (while (search-backward "completion" nil 'move)
1028 (replace-match "history reference")))
1029 (sit-for 0)
1030 (message "Hit space to flush")
1031 (setq comint-dynamic-list-input-ring-window-conf conf)
1032 (let ((ch (read-event)))
1033 (if (eq ch ?\s)
1034 (set-window-configuration conf)
1035 (setq unread-command-events (list ch)))))))
1038 (defun comint-regexp-arg (prompt)
1039 "Return list of regexp and prefix arg using PROMPT."
1040 (let* (;; Don't clobber this.
1041 (last-command last-command)
1042 (regexp (read-from-minibuffer prompt nil nil nil
1043 'minibuffer-history-search-history)))
1044 ;; If the user didn't enter anything, nothing is added to m-h-s-h.
1045 ;; Use the previous search regexp, if there is one.
1046 (list (if (string-equal regexp "")
1047 (or (car minibuffer-history-search-history)
1048 regexp)
1049 regexp)
1050 (prefix-numeric-value current-prefix-arg))))
1052 (defun comint-search-arg (arg)
1053 ;; First make sure there is a ring and that we are after the process mark
1054 (cond ((not (comint-after-pmark-p))
1055 (error "Not at command line"))
1056 ((or (null comint-input-ring)
1057 (ring-empty-p comint-input-ring))
1058 (error "Empty input ring"))
1059 ((zerop arg)
1060 ;; arg of zero resets search from beginning, and uses arg of 1
1061 (setq comint-input-ring-index nil)
1062 1)
1063 (t
1064 arg)))
1066 (defun comint-restore-input ()
1067 "Restore unfinished input."
1068 (interactive)
1069 (when comint-input-ring-index
1070 (comint-delete-input)
1071 (when (> (length comint-stored-incomplete-input) 0)
1072 (insert comint-stored-incomplete-input)
1073 (message "Input restored"))
1074 (setq comint-input-ring-index nil)))
1076 (defun comint-search-start (arg)
1077 "Index to start a directional search, starting at `comint-input-ring-index'."
1078 (if comint-input-ring-index
1079 ;; If a search is running, offset by 1 in direction of arg
1080 (mod (+ comint-input-ring-index (if (> arg 0) 1 -1))
1081 (ring-length comint-input-ring))
1082 ;; For a new search, start from beginning or end, as appropriate
1083 (if (>= arg 0)
1084 0 ; First elt for forward search
1085 (1- (ring-length comint-input-ring))))) ; Last elt for backward search
1087 (defun comint-previous-input-string (arg)
1088 "Return the string ARG places along the input ring.
1089 Moves relative to `comint-input-ring-index'."
1090 (ring-ref comint-input-ring (if comint-input-ring-index
1091 (mod (+ arg comint-input-ring-index)
1092 (ring-length comint-input-ring))
1093 arg)))
1095 (defun comint-previous-input (arg)
1096 "Cycle backwards through input history, saving input."
1097 (interactive "*p")
1098 (if (and comint-input-ring-index
1099 (or ;; leaving the "end" of the ring
1100 (and (< arg 0) ; going down
1101 (eq comint-input-ring-index 0))
1102 (and (> arg 0) ; going up
1103 (eq comint-input-ring-index
1104 (1- (ring-length comint-input-ring)))))
1105 comint-stored-incomplete-input)
1106 (comint-restore-input)
1107 (comint-previous-matching-input "." arg)))
1109 (defun comint-next-input (arg)
1110 "Cycle forwards through input history."
1111 (interactive "*p")
1112 (comint-previous-input (- arg)))
1114 (defun comint-previous-matching-input-string (regexp arg)
1115 "Return the string matching REGEXP ARG places along the input ring.
1116 Moves relative to `comint-input-ring-index'."
1117 (let* ((pos (comint-previous-matching-input-string-position regexp arg)))
1118 (if pos (ring-ref comint-input-ring pos))))
1120 (defun comint-previous-matching-input-string-position (regexp arg &optional start)
1121 "Return the index matching REGEXP ARG places along the input ring.
1122 Moves relative to START, or `comint-input-ring-index'."
1123 (if (or (not (ring-p comint-input-ring))
1124 (ring-empty-p comint-input-ring))
1125 (error "No history"))
1126 (let* ((len (ring-length comint-input-ring))
1127 (motion (if (> arg 0) 1 -1))
1128 (n (mod (- (or start (comint-search-start arg)) motion) len))
1129 (tried-each-ring-item nil)
1130 (prev nil))
1131 ;; Do the whole search as many times as the argument says.
1132 (while (and (/= arg 0) (not tried-each-ring-item))
1133 ;; Step once.
1134 (setq prev n
1135 n (mod (+ n motion) len))
1136 ;; If we haven't reached a match, step some more.
1137 (while (and (< n len) (not tried-each-ring-item)
1138 (not (string-match regexp (ring-ref comint-input-ring n))))
1139 (setq n (mod (+ n motion) len)
1140 ;; If we have gone all the way around in this search.
1141 tried-each-ring-item (= n prev)))
1142 (setq arg (if (> arg 0) (1- arg) (1+ arg))))
1143 ;; Now that we know which ring element to use, if we found it, return that.
1144 (if (string-match regexp (ring-ref comint-input-ring n))
1145 n)))
1147 (defun comint-delete-input ()
1148 "Delete all input between accumulation or process mark and point."
1149 (delete-region
1150 ;; Can't use kill-region as it sets this-command
1151 (or (marker-position comint-accum-marker)
1152 (process-mark (get-buffer-process (current-buffer))))
1153 (point-max)))
1155 (defun comint-previous-matching-input (regexp n)
1156 "Search backwards through input history for match for REGEXP.
1157 \(Previous history elements are earlier commands.)
1158 With prefix argument N, search for Nth previous match.
1159 If N is negative, find the next or Nth next match."
1160 (interactive (comint-regexp-arg "Previous input matching (regexp): "))
1161 (setq n (comint-search-arg n))
1162 (let ((pos (comint-previous-matching-input-string-position regexp n)))
1163 ;; Has a match been found?
1164 (if (null pos)
1165 (error "Not found")
1166 ;; If leaving the edit line, save partial input
1167 (if (null comint-input-ring-index) ;not yet on ring
1168 (setq comint-stored-incomplete-input
1169 (funcall comint-get-old-input)))
1170 (setq comint-input-ring-index pos)
1171 (message "History item: %d" (1+ pos))
1172 (comint-delete-input)
1173 (insert (ring-ref comint-input-ring pos)))))
1175 (defun comint-next-matching-input (regexp n)
1176 "Search forwards through input history for match for REGEXP.
1177 \(Later history elements are more recent commands.)
1178 With prefix argument N, search for Nth following match.
1179 If N is negative, find the previous or Nth previous match."
1180 (interactive (comint-regexp-arg "Next input matching (regexp): "))
1181 (comint-previous-matching-input regexp (- n)))
1183 (defun comint-previous-matching-input-from-input (n)
1184 "Search backwards through input history for match for current input.
1185 \(Previous history elements are earlier commands.)
1186 With prefix argument N, search for Nth previous match.
1187 If N is negative, search forwards for the -Nth following match."
1188 (interactive "p")
1189 (if (not (memq last-command '(comint-previous-matching-input-from-input
1190 comint-next-matching-input-from-input)))
1191 ;; Starting a new search
1192 (setq comint-matching-input-from-input-string
1193 (buffer-substring
1194 (or (marker-position comint-accum-marker)
1195 (process-mark (get-buffer-process (current-buffer))))
1196 (point))
1197 comint-input-ring-index nil))
1198 (comint-previous-matching-input
1199 (concat "^" (regexp-quote comint-matching-input-from-input-string))
1200 n))
1202 (defun comint-next-matching-input-from-input (n)
1203 "Search forwards through input history for match for current input.
1204 \(Following history elements are more recent commands.)
1205 With prefix argument N, search for Nth following match.
1206 If N is negative, search backwards for the -Nth previous match."
1207 (interactive "p")
1208 (comint-previous-matching-input-from-input (- n)))
1211 (defun comint-replace-by-expanded-history (&optional silent start)
1212 "Expand input command history references before point.
1213 Expansion is dependent on the value of `comint-input-autoexpand'.
1215 This function depends on the buffer's idea of the input history, which may not
1216 match the command interpreter's idea, assuming it has one.
1218 Assumes history syntax is like typical Un*x shells'. However, since Emacs
1219 cannot know the interpreter's idea of input line numbers, assuming it has one,
1220 it cannot expand absolute input line number references.
1222 If the optional argument SILENT is non-nil, never complain
1223 even if history reference seems erroneous.
1225 If the optional argument START is non-nil, that specifies the
1226 start of the text to scan for history references, rather
1227 than the logical beginning of line.
1229 See `comint-magic-space' and `comint-replace-by-expanded-history-before-point'.
1231 Returns t if successful."
1232 (interactive)
1233 (if (and comint-input-autoexpand
1234 (if comint-use-prompt-regexp
1235 ;; Use comint-prompt-regexp
1236 (save-excursion
1237 (beginning-of-line)
1239 ;; Use input fields. User input that hasn't been entered
1240 ;; yet, at the end of the buffer, has a nil `field' property.
1241 (and (null (get-char-property (point) 'field))
1243 ;; Looks like there might be history references in the command.
1244 (let ((previous-modified-tick (buffer-modified-tick)))
1245 (comint-replace-by-expanded-history-before-point silent start)
1246 (/= previous-modified-tick (buffer-modified-tick)))))
1249 (defun comint-replace-by-expanded-history-before-point (silent &optional start)
1250 "Expand directory stack reference before point.
1251 See `comint-replace-by-expanded-history'. Returns t if successful.
1253 If the optional argument START is non-nil, that specifies the
1254 start of the text to scan for history references, rather
1255 than the logical beginning of line."
1256 (save-excursion
1257 (let ((toend (- (line-end-position) (point)))
1258 (start (or start (comint-line-beginning-position))))
1259 (goto-char start)
1260 (while (progn
1261 (skip-chars-forward "^!^" (- (line-end-position) toend))
1262 (< (point) (- (line-end-position) toend)))
1263 ;; This seems a bit complex. We look for references such as !!, !-num,
1264 ;; !foo, !?foo, !{bar}, !?{bar}, ^oh, ^my^, ^god^it, ^never^ends^.
1265 ;; If that wasn't enough, the plings can be suffixed with argument
1266 ;; range specifiers.
1267 ;; Argument ranges are complex too, so we hive off the input line,
1268 ;; referenced with plings, with the range string to `comint-args'.
1269 (setq comint-input-ring-index nil)
1271 (comint-within-quotes start (point)))
1272 ;; The history is quoted, or we're in quotes.
1273 (goto-char (1+ (point))))
1275 ;; We cannot know the interpreter's idea of input line numbers.
1276 (goto-char (match-end 0))
1277 (message "Absolute reference cannot be expanded"))
1279 ;; Just a number of args from `number' lines backward.
1280 (let ((number (1- (string-to-number
1281 (buffer-substring (match-beginning 1)
1282 (match-end 1))))))
1283 (if (<= number (ring-length comint-input-ring))
1284 (progn
1285 (replace-match
1286 (comint-args (comint-previous-input-string number)
1287 (match-beginning 2) (match-end 2))
1288 t t)
1289 (setq comint-input-ring-index number)
1290 (message "History item: %d" (1+ number)))
1291 (goto-char (match-end 0))
1292 (message "Relative reference exceeds input history size"))))
1294 ;; Just a number of args from the previous input line.
1295 (replace-match (comint-args (comint-previous-input-string 0)
1296 (match-beginning 1) (match-end 1))
1297 t t)
1298 (message "History item: previous"))
1299 ((looking-at
1301 ;; Most recent input starting with or containing (possibly
1302 ;; protected) string, maybe just a number of args. Phew.
1303 (let* ((mb1 (match-beginning 1)) (me1 (match-end 1))
1304 (mb2 (match-beginning 2)) (me2 (match-end 2))
1305 (exp (buffer-substring (or mb2 mb1) (or me2 me1)))
1307 (pos (save-match-data
1308 (comint-previous-matching-input-string-position
1309 (concat pref (regexp-quote exp)) 1))))
1310 (if (null pos)
1311 (progn
1312 (goto-char (match-end 0))
1313 (or silent
1314 (progn (message "Not found")
1315 (ding))))
1316 (setq comint-input-ring-index pos)
1317 (replace-match
1318 (comint-args (ring-ref comint-input-ring pos)
1319 (match-beginning 4) (match-end 4))
1320 t t)
1321 (message "History item: %d" (1+ pos)))))
1323 ;; Quick substitution on the previous input line.
1324 (let ((old (buffer-substring (match-beginning 1) (match-end 1)))
1325 (new (buffer-substring (match-beginning 2) (match-end 2)))
1326 (pos nil))
1327 (replace-match (comint-previous-input-string 0) t t)
1328 (setq pos (point))
1329 (goto-char (match-beginning 0))
1330 (if (not (search-forward old pos t))
1331 (or silent
1332 (error "Not found"))
1333 (replace-match new t t)
1334 (message "History item: substituted"))))
1335 (t
1336 (forward-char 1)))))))
1339 (defun comint-magic-space (arg)
1340 "Expand input history references before point and insert ARG spaces.
1341 A useful command to bind to SPC. See `comint-replace-by-expanded-history'."
1342 (interactive "p")
1343 (comint-replace-by-expanded-history)
1344 (self-insert-command arg))
1345 \f
1346 ;; Isearch in comint input history
1348 (defcustom comint-history-isearch nil
1349 "Non-nil to Isearch in input history only, not in comint buffer output.
1350 If t, usual Isearch keys like `C-r' and `C-M-r' in comint mode search
1351 in the input history.
1352 If `dwim', Isearch keys search in the input history only when initial
1353 point position is at the comint command line. When starting Isearch
1354 from other parts of the comint buffer, they search in the comint buffer.
1355 If nil, Isearch operates on the whole comint buffer."
1356 :type '(choice (const :tag "Don't search in input history" nil)
1357 (const :tag "When point is on command line initially, search history" dwim)
1358 (const :tag "Always search in input history" t))
1359 :group 'comint
1360 :version "23.2")
1362 (defun comint-history-isearch-backward ()
1363 "Search for a string backward in input history using Isearch."
1364 (interactive)
1365 (let ((comint-history-isearch t))
1366 (isearch-backward)))
1368 (defun comint-history-isearch-backward-regexp ()
1369 "Search for a regular expression backward in input history using Isearch."
1370 (interactive)
1371 (let ((comint-history-isearch t))
1372 (isearch-backward-regexp)))
1374 (defvar comint-history-isearch-message-overlay nil)
1375 (make-variable-buffer-local 'comint-history-isearch-message-overlay)
1377 (defun comint-history-isearch-setup ()
1378 "Set up a comint for using Isearch to search the input history.
1379 Intended to be added to `isearch-mode-hook' in `comint-mode'."
1380 (when (or (eq comint-history-isearch t)
1381 (and (eq comint-history-isearch 'dwim)
1382 ;; Point is at command line.
1383 (comint-after-pmark-p)))
1384 (setq isearch-message-prefix-add "history ")
1385 (set (make-local-variable 'isearch-search-fun-function)
1386 'comint-history-isearch-search)
1387 (set (make-local-variable 'isearch-message-function)
1388 'comint-history-isearch-message)
1389 (set (make-local-variable 'isearch-wrap-function)
1390 'comint-history-isearch-wrap)
1391 (set (make-local-variable 'isearch-push-state-function)
1392 'comint-history-isearch-push-state)
1393 (add-hook 'isearch-mode-end-hook 'comint-history-isearch-end nil t)))
1395 (defun comint-history-isearch-end ()
1396 "Clean up the comint after terminating Isearch in comint."
1397 (if comint-history-isearch-message-overlay
1398 (delete-overlay comint-history-isearch-message-overlay))
1399 (setq isearch-message-prefix-add nil)
1400 (setq isearch-search-fun-function nil)
1401 (setq isearch-message-function nil)
1402 (setq isearch-wrap-function nil)
1403 (setq isearch-push-state-function nil)
1404 (remove-hook 'isearch-mode-end-hook 'comint-history-isearch-end t))
1406 (defun comint-goto-input (pos)
1407 "Put input history item of the absolute history position POS."
1408 ;; If leaving the edit line, save partial unfinished input.
1409 (if (null comint-input-ring-index)
1410 (setq comint-stored-incomplete-input
1411 (funcall comint-get-old-input)))
1412 (setq comint-input-ring-index pos)
1413 (comint-delete-input)
1414 (if (and pos (not (ring-empty-p comint-input-ring)))
1415 (insert (ring-ref comint-input-ring pos))
1416 ;; Restore partial unfinished input.
1417 (when (> (length comint-stored-incomplete-input) 0)
1418 (insert comint-stored-incomplete-input))))
1420 (defun comint-history-isearch-search ()
1421 "Return the proper search function, for Isearch in input history."
1422 (cond
1423 (isearch-word
1424 (if isearch-forward 'word-search-forward 'word-search-backward))
1425 (t
1426 (lambda (string bound noerror)
1427 (let ((search-fun
1428 ;; Use standard functions to search within comint text
1429 (cond
1430 (isearch-regexp
1431 (if isearch-forward 're-search-forward 're-search-backward))
1432 (t
1433 (if isearch-forward 'search-forward 'search-backward))))
1434 found)
1435 ;; Avoid lazy-highlighting matches in the comint prompt and in the
1436 ;; output when searching forward. Lazy-highlight calls this lambda
1437 ;; with the bound arg, so skip the prompt and the output.
1438 (if (and bound isearch-forward (not (comint-after-pmark-p)))
1439 (goto-char (process-mark (get-buffer-process (current-buffer)))))
1440 (or
1441 ;; 1. First try searching in the initial comint text
1442 (funcall search-fun string
1443 (if isearch-forward bound (comint-line-beginning-position))
1444 noerror)
1445 ;; 2. If the above search fails, start putting next/prev history
1446 ;; elements in the comint successively, and search the string
1447 ;; in them. Do this only when bound is nil (i.e. not while
1448 ;; lazy-highlighting search strings in the current comint text).
1449 (unless bound
1450 (condition-case nil
1451 (progn
1452 (while (not found)
1453 (cond (isearch-forward
1454 ;; Signal an error here explicitly, because
1455 ;; `comint-next-input' doesn't signal an error.
1456 (when (null comint-input-ring-index)
1457 (error "End of history; no next item"))
1458 (comint-next-input 1)
1459 (goto-char (comint-line-beginning-position)))
1460 (t
1461 ;; Signal an error here explicitly, because
1462 ;; `comint-previous-input' doesn't signal an error.
1463 (when (eq comint-input-ring-index
1464 (1- (ring-length comint-input-ring)))
1465 (error "Beginning of history; no preceding item"))
1466 (comint-previous-input 1)
1467 (goto-char (point-max))))
1468 (setq isearch-barrier (point) isearch-opoint (point))
1469 ;; After putting the next/prev history element, search
1470 ;; the string in them again, until comint-next-input
1471 ;; or comint-previous-input raises an error at the
1472 ;; beginning/end of history.
1473 (setq found (funcall search-fun string
1474 (unless isearch-forward
1475 ;; For backward search, don't search
1476 ;; in the comint prompt
1477 (comint-line-beginning-position))
1478 noerror)))
1479 ;; Return point of the new search result
1480 (point))
1481 ;; Return nil on the error "no next/preceding item"
1482 (error nil)))))))))
1484 (defun comint-history-isearch-message (&optional c-q-hack ellipsis)
1485 "Display the input history search prompt.
1486 If there are no search errors, this function displays an overlay with
1487 the Isearch prompt which replaces the original comint prompt.
1488 Otherwise, it displays the standard Isearch message returned from
1489 `isearch-message'."
1490 (if (not (and isearch-success (not isearch-error)))
1491 ;; Use standard function `isearch-message' when not in comint prompt,
1492 ;; or search fails, or has an error (like incomplete regexp).
1493 ;; This function displays isearch message in the echo area,
1494 ;; so it's possible to see what is wrong in the search string.
1495 (isearch-message c-q-hack ellipsis)
1496 ;; Otherwise, put the overlay with the standard isearch prompt over
1497 ;; the initial comint prompt.
1498 (if (overlayp comint-history-isearch-message-overlay)
1499 (move-overlay comint-history-isearch-message-overlay
1500 (save-excursion (forward-line 0) (point))
1501 (comint-line-beginning-position))
1502 (setq comint-history-isearch-message-overlay
1503 (make-overlay (save-excursion (forward-line 0) (point))
1504 (comint-line-beginning-position)))
1505 (overlay-put comint-history-isearch-message-overlay 'evaporate t))
1506 (overlay-put comint-history-isearch-message-overlay
1507 'display (isearch-message-prefix c-q-hack ellipsis))
1508 ;; And clear any previous isearch message.
1509 (message "")))
1511 (defun comint-history-isearch-wrap ()
1512 "Wrap the input history search when search fails.
1513 Move point to the first history element for a forward search,
1514 or to the last history element for a backward search."
1515 (unless isearch-word
1516 ;; When `comint-history-isearch-search' fails on reaching the
1517 ;; beginning/end of the history, wrap the search to the first/last
1518 ;; input history element.
1519 (if isearch-forward
1520 (comint-goto-input (1- (ring-length comint-input-ring)))
1521 (comint-goto-input nil))
1522 (setq isearch-success t))
1523 (goto-char (if isearch-forward (comint-line-beginning-position) (point-max))))
1525 (defun comint-history-isearch-push-state ()
1526 "Save a function restoring the state of input history search.
1527 Save `comint-input-ring-index' to the additional state parameter
1528 in the search status stack."
1529 `(lambda (cmd)
1530 (comint-history-isearch-pop-state cmd ,comint-input-ring-index)))
1532 (defun comint-history-isearch-pop-state (_cmd hist-pos)
1533 "Restore the input history search state.
1534 Go to the history element by the absolute history position HIST-POS."
1535 (comint-goto-input hist-pos))
1537 \f
1538 (defun comint-within-quotes (beg end)
1539 "Return t if the number of quotes between BEG and END is odd.
1540 Quotes are single and double."
1543 (or (= (mod countsq 2) 1) (= (mod countdq 2) 1))))
1545 (defun comint-how-many-region (regexp beg end)
1546 "Return number of matches for REGEXP from BEG to END."
1547 (let ((count 0))
1548 (save-excursion
1549 (save-match-data
1550 (goto-char beg)
1551 (while (re-search-forward regexp end t)
1552 (setq count (1+ count)))))
1553 count))
1555 (defun comint-args (string begin end)
1556 ;; From STRING, return the args depending on the range specified in the text
1557 ;; from BEGIN to END. If BEGIN is nil, assume all args. Ignore leading `:'.
1558 ;; Range can be x-y, x-, -y, where x/y can be [0-9], *, ^, $.
1559 (save-match-data
1560 (if (null begin)
1561 (comint-arguments string 0 nil)
1562 (let* ((range (buffer-substring
1563 (if (eq (char-after begin) ?:) (1+ begin) begin) end))
1564 (nth (cond ((string-match "^[*^]" range) 1)
1565 ((string-match "^-" range) 0)
1566 ((string-equal range "$") nil)
1567 (t (string-to-number range))))
1568 (mth (cond ((string-match "[-*$]$" range) nil)
1569 ((string-match "-" range)
1570 (string-to-number (substring range (match-end 0))))
1571 (t nth))))
1572 (comint-arguments string nth mth)))))
1574 (defun comint-delim-arg (arg)
1575 "Return a list of arguments from ARG.
1576 Break it up at the delimiters in `comint-delimiter-argument-list'.
1577 Returned list is backwards.
1579 Characters with non-nil values of the text property `literal' are
1580 assumed to have literal values (e.g., backslash-escaped
1581 characters), and are not considered to be delimiters."
1582 (if (null comint-delimiter-argument-list)
1583 (list arg)
1584 (let ((args nil)
1585 (pos 0)
1586 (len (length arg)))
1587 (while (< pos len)
1588 (let ((char (aref arg pos))
1589 (start pos))
1590 (if (and (memq char comint-delimiter-argument-list)
1591 ;; Ignore backslash-escaped characters.
1592 (not (get-text-property pos 'literal arg)))
1593 (while (and (< pos len) (eq (aref arg pos) char))
1594 (setq pos (1+ pos)))
1595 (while (and (< pos len)
1596 (not (and (memq (aref arg pos)
1597 comint-delimiter-argument-list)
1598 (not (get-text-property
1599 pos 'literal arg)))))
1600 (setq pos (1+ pos))))
1601 (setq args (cons (substring arg start pos) args))))
1602 args)))
1604 (defun comint-arguments (string nth mth)
1605 "Return from STRING the NTH to MTH arguments.
1606 NTH and/or MTH can be nil, which means the last argument.
1607 Returned arguments are separated by single spaces.
1608 We assume whitespace separates arguments, except within quotes
1609 and except for a space or tab that immediately follows a backslash.
1610 Also, a run of one or more of a single character
1611 in `comint-delimiter-argument-list' is a separate argument.
1612 Argument 0 is the command name."
1613 ;; The first line handles ordinary characters and backslash-sequences
1614 ;; (except with w32 msdos-like shells, where backslashes are valid).
1615 ;; The second matches "-quoted strings.
1616 ;; The third matches '-quoted strings.
1617 ;; The fourth matches `-quoted strings.
1618 ;; This seems to fit the syntax of BASH 2.0.
1619 (let* ((backslash-escape (not (and (fboundp 'w32-shell-dos-semantics)
1620 (w32-shell-dos-semantics))))
1621 (first (if backslash-escape
1624 (argpart (concat first
1628 (quote-subexpr (if backslash-escape 2 1))
1629 (args ()) (pos 0)
1630 (count 0)
1631 beg str quotes)
1632 ;; Build a list of all the args until we have as many as we want.
1633 (while (and (or (null mth) (<= count mth))
1634 (string-match argpart string pos))
1635 ;; Apply the `literal' text property to backslash-escaped
1636 ;; characters, so that `comint-delim-arg' won't break them up.
1637 (and backslash-escape
1638 (match-beginning 1)
1639 (put-text-property (match-beginning 1) (match-end 1)
1640 'literal t string))
1641 (if (and beg (= pos (match-beginning 0)))
1642 ;; It's contiguous, part of the same arg.
1643 (setq pos (match-end 0)
1644 quotes (or quotes (match-beginning quote-subexpr)))
1645 ;; It's a new separate arg.
1646 (if beg
1647 ;; Put the previous arg, if there was one, onto ARGS.
1648 (setq str (substring string beg pos)
1649 args (if quotes (cons str args)
1650 (nconc (comint-delim-arg str) args))))
1651 (setq count (length args))
1652 (setq quotes (match-beginning quote-subexpr))
1653 (setq beg (match-beginning 0))
1654 (setq pos (match-end 0))))
1655 (if beg
1656 (setq str (substring string beg pos)
1657 args (if quotes (cons str args)
1658 (nconc (comint-delim-arg str) args))))
1659 (setq count (length args))
1660 (let ((n (or nth (1- count)))
1661 (m (if mth (1- (- count mth)) 0)))
1662 (mapconcat
1663 (function (lambda (a) a)) (nthcdr n (nreverse (nthcdr m args))) " "))))
1664 \f
1665 ;;
1666 ;; Input processing stuff
1667 ;;
1668 (defun comint-add-to-input-history (cmd)
1669 "Add CMD to the input history.
1670 Ignore duplicates if `comint-input-ignoredups' is non-nil."
1671 (if (and (funcall comint-input-filter cmd)
1672 (or (null comint-input-ignoredups)
1673 (not (ring-p comint-input-ring))
1674 (ring-empty-p comint-input-ring)
1675 (not (string-equal (ring-ref comint-input-ring 0)
1676 cmd))))
1677 (ring-insert comint-input-ring cmd)))
1679 (defun comint-send-input (&optional no-newline artificial)
1680 "Send input to process.
1681 After the process output mark, sends all text from the process mark to
1682 point as input to the process. Before the process output mark, calls
1683 value of variable `comint-get-old-input' to retrieve old input, copies
1684 it to the process mark, and sends it.
1686 This command also sends and inserts a final newline, unless
1687 NO-NEWLINE is non-nil.
1689 Any history reference may be expanded depending on the value of the variable
1690 `comint-input-autoexpand'. The list of function names contained in the value
1691 of `comint-input-filter-functions' is called on the input before sending it.
1692 The input is entered into the input history ring, if the value of variable
1693 `comint-input-filter' returns non-nil when called on the input.
1695 If variable `comint-eol-on-send' is non-nil, then point is moved to the
1696 end of line before sending the input.
1698 After the input has been sent, if `comint-process-echoes' is non-nil,
1699 then `comint-send-input' waits to see if the process outputs a string
1700 matching the input, and if so, deletes that part of the output.
1701 If ARTIFICIAL is non-nil, it inhibits such deletion.
1702 Callers sending input not from the user should use ARTIFICIAL = t.
1704 The values of `comint-get-old-input', `comint-input-filter-functions', and
1705 `comint-input-filter' are chosen according to the command interpreter running
1706 in the buffer. E.g.,
1708 If the interpreter is the csh,
1709 `comint-get-old-input' is the default:
1710 If `comint-use-prompt-regexp' is nil, then
1711 either return the current input field, if point is on an input
1712 field, or the current line, if point is on an output field.
1713 If `comint-use-prompt-regexp' is non-nil, then
1714 return the current line with any initial string matching the
1715 regexp `comint-prompt-regexp' removed.
1718 `comint-input-filter' is the default: returns t if the input isn't all white
1719 space.
1721 If the Comint is Lucid Common Lisp,
1722 `comint-get-old-input' snarfs the sexp ending at point.
1723 `comint-input-filter-functions' does nothing.
1724 `comint-input-filter' returns nil if the input matches input-filter-regexp,
1725 which matches (1) all whitespace (2) :a, :c, etc.
1727 Similarly for Soar, Scheme, etc."
1728 (interactive)
1729 ;; Note that the input string does not include its terminal newline.
1730 (let ((proc (get-buffer-process (current-buffer))))
1731 (if (not proc) (error "Current buffer has no process")
1732 (widen)
1733 (let* ((pmark (process-mark proc))
1734 (intxt (if (>= (point) (marker-position pmark))
1735 (progn (if comint-eol-on-send (end-of-line))
1736 (buffer-substring pmark (point)))
1737 (let ((copy (funcall comint-get-old-input)))
1738 (goto-char pmark)
1739 (insert copy)
1740 copy)))
1741 (input (if (not (eq comint-input-autoexpand 'input))
1742 ;; Just whatever's already there
1743 intxt
1744 ;; Expand and leave it visible in buffer
1745 (comint-replace-by-expanded-history t pmark)
1746 (buffer-substring pmark (point))))
1747 (history (if (not (eq comint-input-autoexpand 'history))
1748 input
1749 ;; This is messy 'cos ultimately the original
1750 ;; functions used do insertion, rather than return
1751 ;; strings. We have to expand, then insert back.
1752 (comint-replace-by-expanded-history t pmark)
1753 (let ((copy (buffer-substring pmark (point)))
1754 (start (point)))
1755 (insert input)
1756 (delete-region pmark start)
1757 copy))))
1759 (unless no-newline
1762 (comint-add-to-input-history history)
1764 (run-hook-with-args 'comint-input-filter-functions
1765 (if no-newline input
1768 (let ((beg (marker-position pmark))
1769 (end (if no-newline (point) (1- (point))))
1770 (inhibit-modification-hooks t))
1771 (when (> end beg)
1772 (add-text-properties beg end
1773 '(front-sticky t
1774 font-lock-face comint-highlight-input))
1775 (unless comint-use-prompt-regexp
1776 ;; Give old user input a field property of `input', to
1777 ;; distinguish it from both process output and unsent
1778 ;; input. The terminating newline is put into a special
1779 ;; `boundary' field to make cursor movement between input
1780 ;; and output fields smoother.
1781 (add-text-properties
1782 beg end
1783 '(mouse-face highlight
1784 help-echo "mouse-2: insert after prompt as new input"
1785 field input))))
1786 (unless (or no-newline comint-use-prompt-regexp)
1787 ;; Cover the terminating newline
1788 (add-text-properties end (1+ end)
1789 '(rear-nonsticky t
1790 field boundary
1791 inhibit-line-move-field-capture t))))
1793 (comint-snapshot-last-prompt)
1795 (setq comint-save-input-ring-index comint-input-ring-index)
1796 (setq comint-input-ring-index nil)
1797 ;; Update the markers before we send the input
1798 ;; in case we get output amidst sending the input.
1799 (set-marker comint-last-input-start pmark)
1800 (set-marker comint-last-input-end (point))
1801 (set-marker (process-mark proc) (point))
1802 ;; clear the "accumulation" marker
1803 (set-marker comint-accum-marker nil)
1804 (let ((comint-input-sender-no-newline no-newline))
1805 (funcall comint-input-sender proc input))
1807 ;; Optionally delete echoed input (after checking it).
1808 (when (and comint-process-echoes (not artificial))
1809 (let ((echo-len (- comint-last-input-end
1810 comint-last-input-start)))
1811 ;; Wait for all input to be echoed:
1812 (while (and (accept-process-output proc)
1813 (> (+ comint-last-input-end echo-len)
1814 (point-max))
1815 (zerop
1816 (compare-buffer-substrings
1817 nil comint-last-input-start
1818 (- (point-max) echo-len)
1819 ;; Above difference is equivalent to
1820 ;; (+ comint-last-input-start
1821 ;; (- (point-max) comint-last-input-end))
1822 nil comint-last-input-end (point-max)))))
1823 (if (and
1824 (<= (+ comint-last-input-end echo-len)
1825 (point-max))
1826 (zerop
1827 (compare-buffer-substrings
1828 nil comint-last-input-start comint-last-input-end
1829 nil comint-last-input-end
1830 (+ comint-last-input-end echo-len))))
1831 ;; Certain parts of the text to be deleted may have
1832 ;; been mistaken for prompts. We have to prevent
1833 ;; problems when `comint-prompt-read-only' is non-nil.
1834 (let ((inhibit-read-only t))
1835 (delete-region comint-last-input-end
1836 (+ comint-last-input-end echo-len))
1837 (when comint-prompt-read-only
1838 (save-excursion
1839 (goto-char comint-last-input-end)
1840 (comint-update-fence)))))))
1842 ;; This used to call comint-output-filter-functions,
1843 ;; but that scrolled the buffer in undesirable ways.
1844 (run-hook-with-args 'comint-output-filter-functions "")))))
1846 (defvar comint-preoutput-filter-functions nil
1847 "List of functions to call before inserting Comint output into the buffer.
1848 Each function gets one argument, a string containing the text received
1849 from the subprocess. It should return the string to insert, perhaps
1850 the same string that was received, or perhaps a modified or transformed
1851 string.
1853 The functions on the list are called sequentially, and each one is
1854 given the string returned by the previous one. The string returned by
1855 the last function is the text that is actually inserted in the
1856 redirection buffer.
1858 You can use `add-hook' to add functions to this list
1859 either globally or locally.")
1861 (defvar comint-inhibit-carriage-motion nil
1862 "If nil, Comint will interpret `carriage control' characters in output.
1863 See `comint-carriage-motion' for details.")
1865 ;; When non-nil, this is an overlay over the last recognized prompt in
1866 ;; the buffer; it is used when highlighting the prompt.
1867 (defvar comint-last-prompt-overlay nil)
1869 (defun comint-snapshot-last-prompt ()
1870 "`snapshot' any current `comint-last-prompt-overlay'.
1871 Freeze its attributes in place, even when more input comes along
1872 and moves the prompt overlay."
1873 (when comint-last-prompt-overlay
1874 (let ((inhibit-read-only t)
1875 (inhibit-modification-hooks t))
1876 (add-text-properties (overlay-start comint-last-prompt-overlay)
1877 (overlay-end comint-last-prompt-overlay)
1878 (overlay-properties comint-last-prompt-overlay)))))
1880 (defun comint-carriage-motion (start end)
1881 "Interpret carriage control characters in the region from START to END.
1882 Translate carriage return/linefeed sequences to linefeeds.
1883 Make single carriage returns delete to the beginning of the line.
1884 Make backspaces delete the previous character."
1885 (save-excursion
1887 ;; calling save-match-data and save-restriction. But, such a
1888 ;; check is not necessary now because we don't use regexp search
1889 ;; nor save-restriction. Note that the buffer is already widen,
1890 ;; and calling narrow-to-region and widen are not that heavy.
1891 (goto-char start)
1892 (let* ((inhibit-field-text-motion t)
1893 (inhibit-read-only t)
1894 (lbeg (line-beginning-position))
1895 delete-end ch)
1896 ;; If the preceding text is marked as "must-overwrite", record
1897 ;; it in delete-end.
1898 (when (and (> start (point-min))
1899 (get-text-property (1- start) 'comint-must-overwrite))
1900 (setq delete-end (point-marker))
1901 (remove-text-properties lbeg start '(comint-must-overwrite nil)))
1902 (narrow-to-region lbeg end)
1903 ;; Handle BS, LF, and CR specially.
1905 (setq ch (following-char))
1907 (delete-char 1)
1908 (if (> (point) lbeg)
1909 (delete-char -1)))
1911 (when delete-end ; CH = LF
1912 (if (< delete-end (point))
1913 (delete-region lbeg delete-end))
1914 (set-marker delete-end nil)
1915 (setq delete-end nil))
1916 (forward-char 1)
1917 (setq lbeg (point)))
1918 (t ; CH = CR
1919 (delete-char 1)
1920 (if delete-end
1921 (when (< delete-end (point))
1922 (delete-region lbeg delete-end)
1923 (move-marker delete-end (point)))
1924 (setq delete-end (point-marker))))))
1925 (when delete-end
1926 (if (< delete-end (point))
1927 ;; As there's a text after the last CR, make the current
1928 ;; line contain only that text.
1929 (delete-region lbeg delete-end)
1930 ;; Remember that the process output ends by CR, and thus we
1931 ;; must overwrite the contents of the current line next
1932 ;; time.
1933 (put-text-property lbeg delete-end 'comint-must-overwrite t))
1934 (set-marker delete-end nil))
1935 (widen))))
1937 ;; The purpose of using this filter for comint processes
1938 ;; is to keep comint-last-input-end from moving forward
1939 ;; when output is inserted.
1940 (defun comint-output-filter (process string)
1941 (let ((oprocbuf (process-buffer process)))
1942 ;; First check for killed buffer or no input.
1943 (when (and string oprocbuf (buffer-name oprocbuf))
1944 (with-current-buffer oprocbuf
1945 ;; Run preoutput filters
1946 (let ((functions comint-preoutput-filter-functions))
1947 (while (and functions string)
1948 (if (eq (car functions) t)
1949 (let ((functions
1950 (default-value 'comint-preoutput-filter-functions)))
1951 (while (and functions string)
1952 (setq string (funcall (car functions) string))
1953 (setq functions (cdr functions))))
1954 (setq string (funcall (car functions) string)))
1955 (setq functions (cdr functions))))
1957 ;; Insert STRING
1958 (let ((inhibit-read-only t)
1959 ;; The point should float after any insertion we do.
1960 (saved-point (copy-marker (point) t)))
1962 ;; We temporarly remove any buffer narrowing, in case the
1963 ;; process mark is outside of the restriction
1964 (save-restriction
1965 (widen)
1967 (goto-char (process-mark process))
1968 (set-marker comint-last-output-start (point))
1970 ;; insert-before-markers is a bad thing. XXX
1971 ;; Luckily we don't have to use it any more, we use
1972 ;; window-point-insertion-type instead.
1973 (insert string)
1975 ;; Advance process-mark
1976 (set-marker (process-mark process) (point))
1978 (unless comint-inhibit-carriage-motion
1979 ;; Interpret any carriage motion characters (newline, backspace)
1980 (comint-carriage-motion comint-last-output-start (point)))
1982 ;; Run these hooks with point where the user had it.
1983 (goto-char saved-point)
1984 (run-hook-with-args 'comint-output-filter-functions string)
1985 (set-marker saved-point (point))
1987 (goto-char (process-mark process)) ; in case a filter moved it
1989 (unless comint-use-prompt-regexp
1990 (let ((inhibit-read-only t)
1991 (inhibit-modification-hooks t))
1992 (add-text-properties comint-last-output-start (point)
1993 '(front-sticky
1994 (field inhibit-line-move-field-capture)
1995 rear-nonsticky t
1996 field output
1997 inhibit-line-move-field-capture t))))
1999 ;; Highlight the prompt, where we define `prompt' to mean
2000 ;; the most recent output that doesn't end with a newline.
2001 (let ((prompt-start (save-excursion (forward-line 0) (point)))
2002 (inhibit-read-only t)
2003 (inhibit-modification-hooks t))
2004 (when comint-prompt-read-only
2005 (or (= (point-min) prompt-start)
2006 (get-text-property (1- prompt-start) 'read-only)
2007 (put-text-property
2008 (1- prompt-start) prompt-start 'read-only 'fence))
2009 (add-text-properties
2010 prompt-start (point)
2011 '(read-only t rear-nonsticky t front-sticky (read-only))))
2012 (unless (and (bolp) (null comint-last-prompt-overlay))
2013 ;; Need to create or move the prompt overlay (in the case
2014 ;; where there is no prompt ((bolp) == t), we still do
2015 ;; this if there's already an existing overlay).
2016 (if comint-last-prompt-overlay
2017 ;; Just move an existing overlay
2018 (move-overlay comint-last-prompt-overlay
2019 prompt-start (point))
2020 ;; Need to create the overlay
2021 (setq comint-last-prompt-overlay
2022 (make-overlay prompt-start (point)))
2023 (overlay-put comint-last-prompt-overlay
2024 'font-lock-face 'comint-highlight-prompt))))
2026 (goto-char saved-point)))))))
2028 (defun comint-preinput-scroll-to-bottom ()
2029 "Go to the end of buffer in all windows showing it.
2030 Movement occurs if point in the selected window is not after the process mark,
2031 and `this-command' is an insertion command. Insertion commands recognized
2032 are `self-insert-command', `comint-magic-space', `yank', and `hilit-yank'.
2033 Depends on the value of `comint-scroll-to-bottom-on-input'.
2035 This function should be a pre-command hook."
2036 (if (and comint-scroll-to-bottom-on-input
2037 (memq this-command '(self-insert-command comint-magic-space yank
2038 hilit-yank)))
2039 (let* ((selected (selected-window))
2040 (current (current-buffer))
2041 (process (get-buffer-process current))
2042 (scroll comint-scroll-to-bottom-on-input))
2043 (if (and process (< (point) (process-mark process)))
2044 (if (eq scroll 'this)
2045 (goto-char (point-max))
2046 (walk-windows
2047 (lambda (window)
2048 (if (and (eq (window-buffer window) current)
2049 (or (eq scroll t) (eq scroll 'all)))
2050 (progn
2051 (select-window window)
2052 (goto-char (point-max))
2053 (select-window selected))))
2054 nil t))))))
2056 (defun comint-postoutput-scroll-to-bottom (_string)
2057 "Go to the end of buffer in some or all windows showing it.
2058 Does not scroll if the current line is the last line in the buffer.
2059 Depends on the value of `comint-move-point-for-output' and
2060 `comint-scroll-show-maximum-output'.
2062 This function should be in the list `comint-output-filter-functions'."
2063 (let* ((selected (selected-window))
2064 (current (current-buffer))
2065 (process (get-buffer-process current))
2066 (scroll comint-move-point-for-output))
2067 (unwind-protect
2068 (if process
2069 (walk-windows
2070 (lambda (window)
2071 (when (eq (window-buffer window) current)
2072 (select-window window)
2073 (if (and (< (point) (process-mark process))
2074 (or (eq scroll t) (eq scroll 'all)
2075 ;; Maybe user wants point to jump to end.
2076 (and (eq scroll 'this) (eq selected window))
2077 (and (eq scroll 'others) (not (eq selected window)))
2078 ;; If point was at the end, keep it at end.
2079 (and (marker-position comint-last-output-start)
2080 (>= (point) comint-last-output-start))))
2081 (goto-char (process-mark process)))
2082 ;; Optionally scroll so that the text
2083 ;; ends at the bottom of the window.
2084 (if (and comint-scroll-show-maximum-output
2085 (= (point) (point-max)))
2086 (save-excursion
2087 (goto-char (point-max))
2088 (recenter (- -1 scroll-margin))))
2089 (select-window selected)))
2090 nil t))
2091 (set-buffer current))))
2093 (defun comint-truncate-buffer (&optional _string)
2094 "Truncate the buffer to `comint-buffer-maximum-size'.
2095 This function could be on `comint-output-filter-functions' or bound to a key."
2096 (interactive)
2097 (save-excursion
2098 (goto-char (process-mark (get-buffer-process (current-buffer))))
2099 (forward-line (- comint-buffer-maximum-size))
2100 (beginning-of-line)
2101 (let ((inhibit-read-only t))
2102 (delete-region (point-min) (point)))))
2104 (defun comint-strip-ctrl-m (&optional _string)
2105 "Strip trailing `^M' characters from the current output group.
2106 This function could be on `comint-output-filter-functions' or bound to a key."
2107 (interactive)
2108 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2109 (save-excursion
2110 (condition-case nil
2111 (goto-char
2112 (if (called-interactively-p 'interactive)
2113 comint-last-input-end comint-last-output-start))
2114 (error nil))
2116 (replace-match "" t t)))))
2117 (defalias 'shell-strip-ctrl-m 'comint-strip-ctrl-m)
2119 (defun comint-show-maximum-output ()
2120 "Put the end of the buffer at the bottom of the window."
2121 (interactive)
2122 (goto-char (point-max))
2123 (recenter (- -1 scroll-margin)))
2125 (defun comint-get-old-input-default ()
2126 "Default for `comint-get-old-input'.
2127 If `comint-use-prompt-regexp' is nil, then either
2128 return the current input field, if point is on an input field, or the
2129 current line, if point is on an output field.
2130 If `comint-use-prompt-regexp' is non-nil, then return
2131 the current line with any initial string matching the regexp
2132 `comint-prompt-regexp' removed."
2133 (let ((bof (field-beginning)))
2134 (if (eq (get-char-property bof 'field) 'input)
2135 (field-string-no-properties bof)
2136 (comint-bol)
2137 (buffer-substring-no-properties (point) (line-end-position)))))
2139 (defun comint-copy-old-input ()
2140 "Insert after prompt old input at point as new input to be edited.
2141 Calls `comint-get-old-input' to get old input."
2142 (interactive)
2143 (let ((input (funcall comint-get-old-input))
2144 (process (get-buffer-process (current-buffer))))
2145 (if (not process)
2146 (error "Current buffer has no process")
2147 (goto-char (process-mark process))
2148 (insert input))))
2150 (defun comint-skip-prompt ()
2151 "Skip past the text matching regexp `comint-prompt-regexp'.
2152 If this takes us past the end of the current line, don't skip at all."
2153 (if (and (looking-at comint-prompt-regexp)
2154 (<= (match-end 0) (line-end-position)))
2155 (goto-char (match-end 0))))
2157 (defun comint-after-pmark-p ()
2158 "Return t if point is after the process output marker."
2159 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2160 (<= (marker-position pmark) (point))))
2162 (defun comint-simple-send (proc string)
2163 "Default function for sending to PROC input STRING.
2164 This just sends STRING plus a newline. To override this,
2165 set the hook `comint-input-sender'."
2166 (let ((send-string
2167 (if comint-input-sender-no-newline
2168 string
2169 ;; Sending as two separate strings does not work
2172 (comint-send-string proc send-string))
2173 (if (and comint-input-sender-no-newline
2174 (not (string-equal string "")))
2175 (process-send-eof)))
2177 (defun comint-line-beginning-position ()
2178 "Return the buffer position of the beginning of the line, after any prompt.
2179 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done by
2180 skipping text matching the regular expression `comint-prompt-regexp',
2181 a buffer local variable."
2182 (if comint-use-prompt-regexp
2183 ;; Use comint-prompt-regexp
2184 (save-excursion
2185 (beginning-of-line)
2186 (comint-skip-prompt)
2187 (point))
2188 ;; Use input fields. Note that, unlike the behavior of
2189 ;; `line-beginning-position' inside a field, this function will
2190 ;; return the position of the end of a prompt, even if the point is
2191 ;; already inside the prompt. In order to do this, it assumes that
2192 ;; if there are two fields on a line, then the first one is the
2193 ;; prompt, and the second one is an input field, and is front-sticky
2194 ;; (as input fields should be).
2195 (constrain-to-field (line-beginning-position) (line-end-position))))
2197 (defun comint-bol (&optional arg)
2198 "Go to the beginning of line, then skip past the prompt, if any.
2200 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done
2201 by skipping text matching the regular expression `comint-prompt-regexp',
2202 a buffer local variable."
2203 (interactive "P")
2204 (if arg
2205 ;; Unlike `beginning-of-line', forward-line ignores field boundaries
2206 (forward-line 0)
2207 (goto-char (comint-line-beginning-position))))
2209 ;; For compatibility.
2210 (defun comint-read-noecho (prompt &optional _ignore)
2211 (read-passwd prompt))
2213 ;; These three functions are for entering text you don't want echoed or
2214 ;; saved -- typically passwords to ftp, telnet, or somesuch.
2215 ;; Just enter m-x send-invisible and type in your line.
2217 (defun send-invisible (&optional prompt)
2218 "Read a string without echoing.
2219 Then send it to the process running in the current buffer.
2220 The string is sent using `comint-input-sender'.
2221 Security bug: your string can still be temporarily recovered with
2223 (interactive "P") ; Defeat snooping via C-x ESC ESC
2224 (let ((proc (get-buffer-process (current-buffer)))
2225 (prefix
2226 (if (eq (window-buffer (selected-window)) (current-buffer))
2227 ""
2228 (format "(In buffer %s) "
2229 (current-buffer)))))
2230 (if proc
2231 (let ((str (read-passwd (concat prefix
2232 (or prompt "Non-echoed text: ")))))
2233 (if (stringp str)
2234 (progn
2235 (comint-snapshot-last-prompt)
2236 (funcall comint-input-sender proc str))
2237 (message "Warning: text will be echoed")))
2238 (error "Buffer %s has no process" (current-buffer)))))
2240 (defun comint-watch-for-password-prompt (string)
2241 "Prompt in the minibuffer for password and send without echoing.
2242 This function uses `send-invisible' to read and send a password to the buffer's
2243 process if STRING contains a password prompt defined by
2244 `comint-password-prompt-regexp'.
2246 This function could be in the list `comint-output-filter-functions'."
2247 (when (string-match comint-password-prompt-regexp string)
2249 (setq string (replace-match "" t t string)))
2250 (send-invisible string)))
2251 \f
2252 ;; Low-level process communication
2254 (defun comint-send-string (process string)
2255 "Like `process-send-string', but also does extra bookkeeping for Comint mode."
2256 (if process
2257 (with-current-buffer (if (processp process)
2258 (process-buffer process)
2259 (get-buffer process))
2260 (comint-snapshot-last-prompt))
2261 (comint-snapshot-last-prompt))
2262 (process-send-string process string))
2264 (defun comint-send-region (process start end)
2265 "Like `process-send-region', but also does extra bookkeeping for Comint mode."
2266 (if process
2267 (with-current-buffer (if (processp process)
2268 (process-buffer process)
2269 (get-buffer process))
2270 (comint-snapshot-last-prompt))
2271 (comint-snapshot-last-prompt))
2272 (process-send-region process start end))
2274 \f
2275 ;; Random input hackage
2277 (defun comint-delete-output ()
2278 "Delete all output from interpreter since last input.
2279 Does not delete the prompt."
2280 (interactive)
2281 (let ((proc (get-buffer-process (current-buffer)))
2282 (replacement nil)
2283 (inhibit-read-only t))
2284 (save-excursion
2285 (let ((pmark (progn (goto-char (process-mark proc))
2286 (forward-line 0)
2287 (point-marker))))
2288 (delete-region comint-last-input-end pmark)
2289 (goto-char (process-mark proc))
2291 (buffer-substring pmark (point))))
2292 (delete-region pmark (point))))
2293 ;; Output message and put back prompt
2294 (comint-output-filter proc replacement)))
2296 (defun comint-write-output (filename &optional append mustbenew)
2297 "Write output from interpreter since last input to FILENAME.
2298 Any prompt at the end of the output is not written.
2300 If the optional argument APPEND (the prefix argument when interactive)
2301 is non-nil, the output is appended to the file instead.
2303 If the optional argument MUSTBENEW is non-nil, check for an existing
2304 file with the same name. If MUSTBENEW is `excl', that means to get an
2305 error if the file already exists; never overwrite. If MUSTBENEW is
2306 neither nil nor `excl', that means ask for confirmation before
2307 overwriting, but do go ahead and overwrite the file if the user
2308 confirms. When interactive, MUSTBENEW is nil when appending, and t
2309 otherwise."
2310 (interactive
2311 (list (read-file-name
2312 (if current-prefix-arg
2313 "Append output to file: "
2314 "Write output to file: "))
2315 current-prefix-arg
2316 (not current-prefix-arg)))
2317 (save-excursion
2318 (goto-char (process-mark (get-buffer-process (current-buffer))))
2319 (forward-line 0)
2320 (write-region comint-last-input-end (point) filename
2321 append nil nil mustbenew)))
2323 ;; This function exists for the benefit of the menu; from the keyboard,
2324 ;; users can just use `comint-write-output' with a prefix arg.
2325 (defun comint-append-output-to-file (filename)
2326 "Append output from interpreter since last input to FILENAME.
2327 Any prompt at the end of the output is not written."
2328 (interactive "fAppend output to file: ")
2329 (comint-write-output filename t))
2331 (defun comint-show-output ()
2332 "Display start of this batch of interpreter output at top of window.
2333 Sets mark to the value of point when this command is run."
2334 (interactive)
2335 (push-mark)
2336 (let ((pos (or (marker-position comint-last-input-end) (point-max))))
2337 (cond (comint-use-prompt-regexp
2338 (goto-char pos)
2339 (beginning-of-line 0)
2340 (set-window-start (selected-window) (point))
2341 (comint-skip-prompt))
2342 (t
2343 (goto-char (field-beginning pos))
2344 (set-window-start (selected-window) (point))))))
2347 (defun comint-interrupt-subjob ()
2348 "Interrupt the current subjob.
2349 This command also kills the pending input
2350 between the process mark and point."
2351 (interactive)
2352 (comint-skip-input)
2353 (interrupt-process nil comint-ptyp)
2355 )
2357 (defun comint-kill-subjob ()
2358 "Send kill signal to the current subjob.
2359 This command also kills the pending input
2360 between the process mark and point."
2361 (interactive)
2362 (comint-skip-input)
2363 (kill-process nil comint-ptyp))
2365 (defun comint-quit-subjob ()
2366 "Send quit signal to the current subjob.
2367 This command also kills the pending input
2368 between the process mark and point."
2369 (interactive)
2370 (comint-skip-input)
2371 (quit-process nil comint-ptyp))
2373 (defun comint-stop-subjob ()
2374 "Stop the current subjob.
2375 This command also kills the pending input
2376 between the process mark and point.
2378 WARNING: if there is no current subjob, you can end up suspending
2379 the top-level process running in the buffer. If you accidentally do
2381 is not a problem with most shells, since they ignore this signal.)"
2382 (interactive)
2383 (comint-skip-input)
2384 (stop-process nil comint-ptyp))
2386 (defun comint-continue-subjob ()
2387 "Send CONT signal to process buffer's process group.
2388 Useful if you accidentally suspend the top-level process."
2389 (interactive)
2390 (continue-process nil comint-ptyp))
2392 (defun comint-skip-input ()
2393 "Skip all pending input, from last stuff output by interpreter to point.
2394 This means mark it as if it had been sent as input, without sending it."
2395 (let ((comint-input-sender 'ignore)
2396 (comint-input-filter-functions nil))
2397 (comint-send-input t t))
2398 (end-of-line)
2399 (let ((pos (point))
2400 (marker (process-mark (get-buffer-process (current-buffer)))))
2401 (insert " " (key-description (this-command-keys)))
2402 (if (= marker pos)
2403 (set-marker marker (point)))))
2405 (defun comint-kill-input ()
2406 "Kill all text from last stuff output by interpreter to point."
2407 (interactive)
2408 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2409 (if (> (point) (marker-position pmark))
2410 (kill-region pmark (point)))))
2412 (defun comint-delchar-or-maybe-eof (arg)
2413 "Delete ARG characters forward or send an EOF to subprocess.
2414 Sends an EOF only if point is at the end of the buffer and there is no input."
2415 (interactive "p")
2416 (let ((proc (get-buffer-process (current-buffer))))
2417 (if (and (eobp) proc (= (point) (marker-position (process-mark proc))))
2418 (comint-send-eof)
2419 (delete-char arg))))
2421 (defun comint-send-eof ()
2422 "Send an EOF to the current buffer's process."
2423 (interactive)
2424 (comint-send-input t t)
2425 (process-send-eof))
2428 (defun comint-backward-matching-input (regexp n)
2429 "Search backward through buffer for input fields that match REGEXP.
2430 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2431 by lines that match `comint-prompt-regexp'.
2433 With prefix argument N, search for Nth previous match.
2434 If N is negative, find the next or Nth next match."
2435 (interactive (comint-regexp-arg "Backward input matching (regexp): "))
2436 (if comint-use-prompt-regexp
2437 ;; Use comint-prompt-regexp
2438 (let* ((re (concat comint-prompt-regexp ".*" regexp))
2439 (pos (save-excursion (end-of-line (if (> n 0) 0 1))
2440 (if (re-search-backward re nil t n)
2441 (point)))))
2442 (if (null pos)
2443 (progn (message "Not found")
2444 (ding))
2445 (goto-char pos)
2446 (comint-bol nil)))
2447 ;; Use input fields
2448 (let* ((dir (if (< n 0) -1 1))
2449 (pos
2450 (save-excursion
2451 (while (/= n 0)
2452 (unless (re-search-backward regexp nil t dir)
2453 (error "Not found"))
2454 (when (eq (get-char-property (point) 'field) 'input)
2455 (setq n (- n dir))))
2456 (field-beginning))))
2457 (goto-char pos))))
2460 (defun comint-forward-matching-input (regexp n)
2461 "Search forward through buffer for input fields that match REGEXP.
2462 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2463 by lines that match `comint-prompt-regexp'.
2465 With prefix argument N, search for Nth following match.
2466 If N is negative, find the previous or Nth previous match."
2467 (interactive (comint-regexp-arg "Forward input matching (regexp): "))
2468 (comint-backward-matching-input regexp (- n)))
2471 (defun comint-next-prompt (n)
2472 "Move to end of Nth next prompt in the buffer.
2473 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2474 the Nth next `input' field, otherwise, it means the Nth occurrence of
2475 text matching `comint-prompt-regexp'."
2476 (interactive "p")
2477 (if comint-use-prompt-regexp
2478 ;; Use comint-prompt-regexp
2479 (let ((paragraph-start comint-prompt-regexp))
2480 (end-of-line (if (> n 0) 1 0))
2481 (forward-paragraph n)
2482 (comint-skip-prompt))
2483 ;; Use input fields
2484 (let ((pos (point))
2485 (input-pos nil)
2486 prev-pos)
2487 (while (/= n 0)
2488 (setq prev-pos pos)
2489 (setq pos
2490 (if (> n 0)
2491 (next-single-char-property-change pos 'field)
2492 (previous-single-char-property-change pos 'field)))
2493 (cond ((or (null pos) (= pos prev-pos))
2494 ;; Ran off the end of the buffer.
2495 (when (> n 0)
2496 ;; There's always an input field at the end of the
2497 ;; buffer, but it has a `field' property of nil.
2498 (setq input-pos (point-max)))
2499 ;; stop iterating
2500 (setq n 0))
2501 ((eq (get-char-property pos 'field) 'input)
2502 (setq n (if (< n 0) (1+ n) (1- n)))
2503 (setq input-pos pos))))
2504 (when input-pos
2505 (goto-char input-pos)))))
2508 (defun comint-previous-prompt (n)
2509 "Move to end of Nth previous prompt in the buffer.
2510 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2511 the Nth previous `input' field, otherwise, it means the Nth occurrence of
2512 text matching `comint-prompt-regexp'."
2513 (interactive "p")
2514 (comint-next-prompt (- n)))
2516 ;; State used by `comint-insert-previous-argument' when cycling.
2517 (defvar comint-insert-previous-argument-last-start-pos nil)
2518 (make-variable-buffer-local 'comint-insert-previous-argument-last-start-pos)
2519 (defvar comint-insert-previous-argument-last-index nil)
2520 (make-variable-buffer-local 'comint-insert-previous-argument-last-index)
2522 ;; Needs fixing:
2523 ;; make comint-arguments understand negative indices as bash does
2524 (defun comint-insert-previous-argument (index)
2525 "Insert the INDEXth argument from the previous Comint command-line at point.
2526 Spaces are added at beginning and/or end of the inserted string if
2527 necessary to ensure that it's separated from adjacent arguments.
2528 Interactively, if no prefix argument is given, the last argument is inserted.
2529 Repeated interactive invocations will cycle through the same argument
2530 from progressively earlier commands (using the value of INDEX specified
2531 with the first command).
2532 This command is like `M-.' in bash."
2533 (interactive "P")
2534 (unless (null index)
2535 (setq index (prefix-numeric-value index)))
2536 (cond ((eq last-command this-command)
2537 ;; Delete last input inserted by this command.
2538 (delete-region comint-insert-previous-argument-last-start-pos (point))
2539 (setq index comint-insert-previous-argument-last-index))
2540 (t
2541 ;; This is a non-repeat invocation, so initialize state.
2542 (setq comint-input-ring-index nil)
2543 (setq comint-insert-previous-argument-last-index index)
2544 (when (null comint-insert-previous-argument-last-start-pos)
2545 ;; First usage; initialize to a marker
2546 (setq comint-insert-previous-argument-last-start-pos
2547 (make-marker)))))
2548 ;; Make sure we're not in the prompt, and add a beginning space if necess.
2549 (if (<= (point) (comint-line-beginning-position))
2550 (comint-bol)
2551 (just-one-space))
2552 ;; Remember the beginning of what we insert, so we can delete it if
2553 ;; the command is repeated.
2554 (set-marker comint-insert-previous-argument-last-start-pos (point))
2555 ;; Insert the argument.
2556 (let ((input-string (comint-previous-input-string 0)))
2558 ;; strip terminating '&'
2559 (setq input-string (substring input-string 0 (match-beginning 0))))
2560 (insert (comint-arguments input-string index index)))
2561 ;; Make next invocation return arg from previous input
2562 (setq comint-input-ring-index (1+ (or comint-input-ring-index 0)))
2563 ;; Add a terminating space if necessary.
2564 (unless (eolp)
2565 (just-one-space)))
2567 \f
2568 ;; Support editing with `comint-prompt-read-only' set to t.
2570 (defun comint-update-fence ()
2571 "Update read-only status of newline before point.
2572 The `fence' read-only property is used to indicate that a newline
2574 following front-sticky read-only region. This is used to
2575 implement comint read-only prompts. If the text after a newline
2576 changes, the read-only status of that newline may need updating.
2577 That is what this function does.
2579 This function does nothing if point is not at the beginning of a
2580 line, or is at the beginning of the accessible portion of the buffer.
2581 Otherwise, if the character after point has a front-sticky
2582 read-only property, then the preceding newline is given a
2583 read-only property of `fence', unless it already is read-only.
2584 If the character after point does not have a front-sticky
2585 read-only property, any read-only property of `fence' on the
2586 preceding newline is removed."
2587 (let* ((pt (point)) (lst (get-text-property pt 'front-sticky))
2588 (inhibit-modification-hooks t))
2589 (and (bolp)
2590 (not (bobp))
2591 (if (and (get-text-property pt 'read-only)
2592 (if (listp lst) (memq 'read-only lst) t))
2593 (unless (get-text-property (1- pt) 'read-only)
2594 (put-text-property (1- pt) pt 'read-only 'fence))
2595 (when (eq (get-text-property (1- pt) 'read-only) 'fence)
2596 (remove-list-of-text-properties (1- pt) pt '(read-only)))))))
2598 (defun comint-kill-whole-line (&optional count)
2599 "Kill current line, ignoring read-only and field properties.
2600 With prefix arg COUNT, kill that many lines starting from the current line.
2601 If COUNT is negative, kill backward. Also kill the preceding newline,
2603 with negative arguments.)
2604 If COUNT is zero, kill current line but exclude the trailing newline.
2605 The read-only status of newlines is updated with `comint-update-fence',
2606 if necessary."
2607 (interactive "p")
2608 (let ((inhibit-read-only t) (inhibit-field-text-motion t))
2609 (kill-whole-line count)
2610 (when (>= count 0) (comint-update-fence))))
2612 (defun comint-kill-region (beg end &optional yank-handler)
2613 "Like `kill-region', but ignores read-only properties, if safe.
2614 This command assumes that the buffer contains read-only
2616 properties at the beginning of a line, with the preceding newline
2617 being read-only to protect the prompt. This is true of the
2618 comint prompts if `comint-prompt-read-only' is non-nil. This
2619 command will not delete the region if this would create mutilated
2620 or out of place prompts. That is, if any part of a prompt is
2621 deleted, the entire prompt must be deleted and all remaining
2622 prompts should stay at the beginning of a line. If this is not
2623 the case, this command just calls `kill-region' with all
2624 read-only properties intact. The read-only status of newlines is
2625 updated using `comint-update-fence', if necessary."
2626 (interactive "r")
2627 (save-excursion
2628 (let* ((true-beg (min beg end))
2629 (true-end (max beg end))
2630 (beg-bolp (progn (goto-char true-beg) (bolp)))
2631 (beg-lst (get-text-property true-beg 'front-sticky))
2632 (beg-bad (and (get-text-property true-beg 'read-only)
2633 (if (listp beg-lst) (memq 'read-only beg-lst) t)))
2634 (end-bolp (progn (goto-char true-end) (bolp)))
2635 (end-lst (get-text-property true-end 'front-sticky))
2636 (end-bad (and (get-text-property true-end 'read-only)
2637 (if (listp end-lst) (memq 'read-only end-lst) t))))
2638 (if (or (and (not beg-bolp) (or beg-bad end-bad))
2639 (and (not end-bolp) end-bad))
2640 (kill-region beg end yank-handler)
2641 (let ((inhibit-read-only t))
2642 (kill-region beg end yank-handler)
2643 (comint-update-fence))))))
2644 (set-advertised-calling-convention 'comint-kill-region '(beg end) "23.3")
2646 \f
2647 ;; Support for source-file processing commands.
2648 ;;============================================================================
2649 ;; Many command-interpreters (e.g., Lisp, Scheme, Soar) have
2650 ;; commands that process files of source text (e.g. loading or compiling
2651 ;; files). So the corresponding process-in-a-buffer modes have commands
2652 ;; for doing this (e.g., lisp-load-file). The functions below are useful
2653 ;; for defining these commands.
2654 ;;
2655 ;; Alas, these guys don't do exactly the right thing for Lisp, Scheme
2656 ;; and Soar, in that they don't know anything about file extensions.
2657 ;; So the compile/load interface gets the wrong default occasionally.
2658 ;; The load-file/compile-file default mechanism could be smarter -- it
2659 ;; doesn't know about the relationship between filename extensions and
2660 ;; whether the file is source or executable. If you compile foo.lisp
2661 ;; with compile-file, then the next load-file should use foo.bin for
2662 ;; the default, not foo.lisp. This is tricky to do right, particularly
2663 ;; because the extension for executable files varies so much (.o, .bin,
2664 ;; .lbin, .mo, .vo, .ao, ...).
2667 ;; COMINT-SOURCE-DEFAULT -- determines defaults for source-file processing
2668 ;; commands.
2669 ;;
2670 ;; COMINT-CHECK-SOURCE -- if FNAME is in a modified buffer, asks you if you
2671 ;; want to save the buffer before issuing any process requests to the command
2672 ;; interpreter.
2673 ;;
2674 ;; COMINT-GET-SOURCE -- used by the source-file processing commands to prompt
2675 ;; for the file to process.
2677 (defun comint-source-default (previous-dir/file source-modes)
2678 "Compute the defaults for `load-file' and `compile-file' commands.
2680 PREVIOUS-DIR/FILE is a pair (DIRECTORY . FILENAME) from the last
2681 source-file processing command, or nil if there hasn't been one yet.
2682 SOURCE-MODES is a list used to determine what buffers contain source
2683 files: if the major mode of the buffer is in SOURCE-MODES, it's source.
2684 Typically, (lisp-mode) or (scheme-mode).
2686 If the command is given while the cursor is inside a string, *and*
2687 the string is an existing filename, *and* the filename is not a directory,
2688 then the string is taken as default. This allows you to just position
2689 your cursor over a string that's a filename and have it taken as default.
2691 If the command is given in a file buffer whose major mode is in
2692 SOURCE-MODES, then the filename is the default file, and the
2693 file's directory is the default directory.
2695 If the buffer isn't a source file buffer (e.g., it's the process buffer),
2696 then the default directory & file are what was used in the last source-file
2697 processing command (i.e., PREVIOUS-DIR/FILE). If this is the first time
2698 the command has been run (PREVIOUS-DIR/FILE is nil), the default directory
2701 SOURCE-MODES is typically going to be something like (tea-mode)
2702 for T programs, (lisp-mode) for Lisp programs, (soar-mode lisp-mode)
2703 for Soar programs, etc.
2705 The function returns a pair: (default-directory . default-file)."
2706 (cond ((and buffer-file-name (memq major-mode source-modes))
2707 (cons (file-name-directory buffer-file-name)
2708 (file-name-nondirectory buffer-file-name)))
2709 (previous-dir/file)
2710 (t
2711 (cons default-directory nil))))
2714 (defun comint-check-source (fname)
2715 "Check whether to save buffers visiting file FNAME.
2716 Prior to loading or compiling (or otherwise processing) a file (in the CMU
2717 process-in-a-buffer modes), this function can be called on the filename.
2718 If the file is loaded into a buffer, and the buffer is modified, the user
2719 is queried to see if he wants to save the buffer before proceeding with
2720 the load or compile."
2721 (let ((buff (get-file-buffer fname)))
2722 (if (and buff
2723 (buffer-modified-p buff)
2724 (y-or-n-p (format "Save buffer %s first? " (buffer-name buff))))
2725 ;; save BUFF.
2726 (let ((old-buffer (current-buffer)))
2727 (set-buffer buff)
2728 (save-buffer)
2729 (set-buffer old-buffer)))))
2731 (defun comint-extract-string ()
2732 "Return string around point, or nil."
2733 (let ((syntax (syntax-ppss)))
2734 (when (nth 3 syntax)
2735 (condition-case ()
2736 (buffer-substring-no-properties (1+ (nth 8 syntax))
2737 (progn (goto-char (nth 8 syntax))
2738 (forward-sexp)
2739 (1- (point))))
2740 (error nil)))))
2742 (defun comint-get-source (prompt prev-dir/file source-modes mustmatch-p)
2743 "Prompt for filenames in commands that process source files,
2744 e.g. loading or compiling a file.
2745 Provides a default, if there is one, and returns the result filename.
2747 See `comint-source-default' for more on determining defaults.
2749 PROMPT is the prompt string. PREV-DIR/FILE is the (DIRECTORY . FILE) pair
2750 from the last source processing command. SOURCE-MODES is a list of major
2751 modes used to determine what file buffers contain source files. (These
2752 two arguments are used for determining defaults.) If MUSTMATCH-P is true,
2753 then the filename reader will only accept a file that exists.
2755 A typical use:
2757 '(lisp-mode) t))"
2758 (let* ((def (comint-source-default prev-dir/file source-modes))
2759 (stringfile (comint-extract-string))
2760 (sfile-p (and stringfile
2761 (condition-case ()
2762 (file-exists-p stringfile)
2763 (error nil))
2764 (not (file-directory-p stringfile))))
2765 (defdir (if sfile-p (file-name-directory stringfile)
2766 (car def)))
2767 (deffile (if sfile-p (file-name-nondirectory stringfile)
2768 (cdr def)))
2769 (ans (read-file-name (if deffile (format "%s(default %s) "
2770 prompt deffile)
2771 prompt)
2772 defdir
2773 (concat defdir deffile)
2774 mustmatch-p)))
2775 (list (expand-file-name (substitute-in-file-name ans)))))
2777 ;; I am somewhat divided on this string-default feature. It seems
2778 ;; to violate the principle-of-least-astonishment, in that it makes
2779 ;; the default harder to predict, so you actually have to look and see
2780 ;; what the default really is before choosing it. This can trip you up.
2781 ;; On the other hand, it can be useful, I guess. I would appreciate feedback
2782 ;; on this.
2783 ;; -Olin
2785 \f
2786 ;; Simple process query facility.
2787 ;; ===========================================================================
2788 ;; This function is for commands that want to send a query to the process
2789 ;; and show the response to the user. For example, a command to get the
2790 ;; arglist for a Common Lisp function might send a "(arglist 'foo)" query
2791 ;; to an inferior Common Lisp process.
2792 ;;
2793 ;; This simple facility just sends strings to the inferior process and pops
2794 ;; up a window for the process buffer so you can see what the process
2795 ;; responds with. We don't do anything fancy like try to intercept what the
2796 ;; process responds with and put it in a pop-up window or on the message
2797 ;; line. We just display the buffer. Low tech. Simple. Works good.
2799 (defun comint-proc-query (proc str)
2800 "Send to the inferior process PROC the string STR.
2801 Pop-up but do not select a window for the inferior process so that
2802 its response can be seen."
2803 (let* ((proc-buf (process-buffer proc))
2804 (proc-mark (process-mark proc)))
2805 (display-buffer proc-buf)
2806 (set-buffer proc-buf) ; but it's not the selected *window*
2807 (let ((proc-win (get-buffer-window proc-buf 0))
2808 (proc-pt (marker-position proc-mark)))
2809 (comint-send-string proc str) ; send the query
2810 (accept-process-output proc) ; wait for some output
2811 ;; Try to position the proc window so you can see the answer.
2812 ;; This is bogus code. If you delete the (sit-for 0), it breaks.
2813 ;; I don't know why. Wizards invited to improve it.
2814 (unless (pos-visible-in-window-p proc-pt proc-win)
2815 (let ((opoint (window-point proc-win)))
2816 (set-window-point proc-win proc-mark)
2817 (sit-for 0)
2818 (if (not (pos-visible-in-window-p opoint proc-win))
2819 (push-mark opoint)
2820 (set-window-point proc-win opoint)))))))
2822 \f
2823 ;; Filename/command/history completion in a buffer
2824 ;; ===========================================================================
2825 ;; Useful completion functions, courtesy of the Ergo group.
2827 ;; Six commands:
2828 ;; comint-dynamic-complete Complete or expand command, filename,
2829 ;; history at point.
2830 ;; comint-dynamic-complete-filename Complete filename at point.
2831 ;; comint-dynamic-list-filename-completions List completions in help buffer.
2832 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
2833 ;; replace with expanded/completed name.
2834 ;; comint-dynamic-simple-complete Complete stub given candidates.
2836 ;; These are not installed in the comint-mode keymap. But they are
2837 ;; available for people who want them. Shell-mode installs them:
2839 ;; (define-key shell-mode-map "\M-?"
2840 ;; 'comint-dynamic-list-filename-completions)))
2841 ;;
2842 ;; Commands like this are fine things to put in load hooks if you
2843 ;; want them present in specific modes.
2845 (defcustom comint-completion-autolist nil
2846 "If non-nil, automatically list possibilities on partial completion.
2847 This mirrors the optional behavior of tcsh."
2848 :type 'boolean
2849 :group 'comint-completion)
2851 (defcustom comint-completion-addsuffix t
2852 "If non-nil, add a `/' to completed directories, ` ' to file names.
2853 If a cons pair, it should be of the form (DIRSUFFIX . FILESUFFIX) where
2854 DIRSUFFIX and FILESUFFIX are strings added on unambiguous or exact completion.
2855 This mirrors the optional behavior of tcsh."
2856 :type '(choice (const :tag "None" nil)
2857 (const :tag "Add /" t)
2858 (cons :tag "Suffix pair"
2859 (string :tag "Directory suffix")
2860 (string :tag "File suffix")))
2861 :group 'comint-completion)
2863 (defcustom comint-completion-recexact nil
2864 "If non-nil, use shortest completion if characters cannot be added.
2865 This mirrors the optional behavior of tcsh.
2867 A non-nil value is useful if `comint-completion-autolist' is non-nil too."
2868 :type 'boolean
2869 :group 'comint-completion)
2871 (defcustom comint-completion-fignore nil
2872 "List of suffixes to be disregarded during file completion.
2873 This mirrors the optional behavior of bash and tcsh.
2875 Note that this applies to `comint-dynamic-complete-filename' only."
2876 :type '(repeat (string :tag "Suffix"))
2877 :group 'comint-completion)
2879 ;;;###autoload
2880 (defvar comint-file-name-prefix (purecopy "")
2881 "Prefix prepended to absolute file names taken from process input.
2882 This is used by Comint's and shell's completion functions, and by shell's
2883 directory tracking functions.")
2885 (defvar comint-file-name-chars
2886 (if (memq system-type '(ms-dos windows-nt cygwin))
2887 "~/A-Za-z0-9_^$!#%&{}@`'.,:()-"
2888 "[]~/A-Za-z0-9+@:_.$#%,={}-")
2889 "String of characters valid in a file name.
2890 Note that all non-ASCII characters are considered valid in a file name
2891 regardless of what this variable says.
2893 This is a good thing to set in mode hooks.")
2895 (defvar comint-file-name-quote-list nil
2898 This is a good thing to set in mode hooks.")
2901 (defun comint-directory (directory)
2902 "Return expanded DIRECTORY, with `comint-file-name-prefix' if absolute."
2903 (expand-file-name (if (file-name-absolute-p directory)
2904 (concat comint-file-name-prefix directory)
2905 directory)))
2908 (defun comint-word (word-chars)
2909 "Return the word of WORD-CHARS at point, or nil if none is found.
2910 Word constituents are considered to be those in WORD-CHARS, which is like the
2912 (save-excursion
2913 (let ((here (point))
2914 giveup)
2915 (while (not giveup)
2916 (let ((startpoint (point)))
2918 ;; Fixme: This isn't consistent with Bash, at least -- not
2919 ;; all non-ASCII chars should be word constituents.
2920 (if (and (> (- (point) 2) (point-min))
2922 (forward-char -2))
2923 (if (and (> (- (point) 1) (point-min))
2924 (>= (char-after (- (point) 1)) 128))
2925 (forward-char -1))
2926 (if (= (point) startpoint)
2927 (setq giveup t))))
2928 ;; Set match-data to match the entire string.
2929 (when (< (point) here)
2930 (set-match-data (list (point) here))
2931 (match-string 0)))))
2933 (defun comint-substitute-in-file-name (filename)
2934 "Return FILENAME with environment variables substituted.
2935 Supports additional environment variable syntax of the command
2936 interpreter (e.g., the percent notation of cmd.exe on Windows)."
2937 (let ((name (substitute-in-file-name filename)))
2938 (if (memq system-type '(ms-dos windows-nt))
2939 (let (env-var-name
2940 env-var-val)
2941 (save-match-data
2943 (setq env-var-name (match-string 1 name))
2944 (setq env-var-val (or (getenv env-var-name) ""))
2945 (setq name (replace-match env-var-val t t name))))))
2946 name))
2948 (defun comint--match-partial-filename ()
2949 "Return the filename at point as-is, or nil if none is found.
2950 See `comint-word'."
2951 (comint-word comint-file-name-chars))
2953 (defun comint--unquote&expand-filename (filename)
2955 ;; gets expanded to the same as "$HOME"
2956 (comint-substitute-in-file-name
2957 (comint-unquote-filename filename)))
2959 (defun comint-match-partial-filename ()
2960 "Return the unquoted&expanded filename at point, or nil if none is found.
2961 Environment variables are substituted. See `comint-word'."
2962 (let ((filename (comint--match-partial-filename)))
2963 (and filename (comint--unquote&expand-filename filename))))
2965 (defun comint-quote-filename (filename)
2966 "Return FILENAME with magic characters quoted.
2967 Magic characters are those in `comint-file-name-quote-list'."
2968 (if (null comint-file-name-quote-list)
2969 filename
2970 (let ((regexp
2971 (format "[%s]"
2972 (mapconcat 'char-to-string comint-file-name-quote-list ""))))
2973 (save-match-data
2974 (let ((i 0))
2975 (while (string-match regexp filename i)
2977 (setq i (1+ (match-end 0)))))
2978 filename))))
2980 (defun comint-unquote-filename (filename)
2981 "Return FILENAME with quoted characters unquoted."
2982 (if (null comint-file-name-quote-list)
2983 filename
2984 (save-match-data
2985 (let ((i 0))
2988 (setq i (+ 1 (match-beginning 0)))))
2989 filename)))
2992 (defun comint-dynamic-complete ()
2993 "Dynamically perform completion at point.
2994 Calls the functions in `comint-dynamic-complete-functions' to perform
2995 completion until a function returns non-nil, at which point completion is
2996 assumed to have occurred."
2997 (interactive)
2998 (let ((completion-at-point-functions comint-dynamic-complete-functions))
2999 (completion-at-point)))
3002 (defun comint-dynamic-complete-filename ()
3003 "Dynamically complete the filename at point.
3004 Completes if after a filename.
3005 This function is similar to `comint-replace-by-expanded-filename', except that
3006 it won't change parts of the filename already entered in the buffer; it just
3007 adds completion characters to the end of the filename. A completions listing
3008 may be shown in a separate buffer if completion is ambiguous.
3010 Completion is dependent on the value of `comint-completion-addsuffix',
3011 `comint-completion-recexact' and `comint-completion-fignore', and the timing of
3012 completions listing is dependent on the value of `comint-completion-autolist'.
3014 Returns t if successful."
3015 (interactive)
3016 (when (comint--match-partial-filename)
3017 (unless (window-minibuffer-p (selected-window))
3018 (message "Completing file name..."))
3019 (comint-dynamic-complete-as-filename)))
3021 (defun comint-dynamic-complete-as-filename ()
3022 "Dynamically complete at point as a filename.
3023 See `comint-dynamic-complete-filename'. Returns t if successful."
3024 (let* ((completion-ignore-case read-file-name-completion-ignore-case)
3025 (completion-ignored-extensions comint-completion-fignore)
3026 ;; If we bind this, it breaks remote directory tracking in rlogin.el.
3027 ;; I think it was originally bound to solve file completion problems,
3028 ;; but subsequent changes may have made this unnecessary. sm.
3029 ;;(file-name-handler-alist nil)
3030 (minibuffer-p (window-minibuffer-p (selected-window)))
3031 (success t)
3032 (dirsuffix (cond ((not comint-completion-addsuffix) "")
3033 ((not (consp comint-completion-addsuffix)) "/")
3034 (t (car comint-completion-addsuffix))))
3035 (filesuffix (cond ((not comint-completion-addsuffix) "")
3036 ((not (consp comint-completion-addsuffix)) " ")
3037 (t (cdr comint-completion-addsuffix))))
3038 (filename (comint-match-partial-filename))
3039 (filename-beg (if filename (match-beginning 0) (point)))
3040 (filename-end (if filename (match-end 0) (point)))
3041 (filename (or filename ""))
3042 (filedir (file-name-directory filename))
3043 (filenondir (file-name-nondirectory filename))
3044 (directory (if filedir (comint-directory filedir) default-directory))
3045 (completion (file-name-completion filenondir directory)))
3046 (cond ((null completion)
3047 (if minibuffer-p
3048 (minibuffer-message "No completions of %s" filename)
3049 (message "No completions of %s" filename))
3050 (setq success nil))
3051 ((eq completion t) ; Means already completed "file".
3052 (insert filesuffix)
3053 (unless minibuffer-p
3054 (message "Sole completion")))
3055 ((string-equal completion "") ; Means completion on "directory/".
3056 (comint-dynamic-list-filename-completions))
3057 (t ; Completion string returned.
3058 (let ((file (concat (file-name-as-directory directory) completion)))
3059 ;; Insert completion. Note that the completion string
3060 ;; may have a different case than what's in the prompt,
3061 ;; if read-file-name-completion-ignore-case is non-nil,
3062 (delete-region filename-beg filename-end)
3063 (if filedir (insert (comint-quote-filename filedir)))
3064 (insert (comint-quote-filename (directory-file-name completion)))
3065 (cond ((symbolp (file-name-completion completion directory))
3066 ;; We inserted a unique completion.
3067 (insert (if (file-directory-p file) dirsuffix filesuffix))
3068 (unless minibuffer-p
3069 (message "Completed")))
3070 ((and comint-completion-recexact comint-completion-addsuffix
3071 (string-equal filenondir completion)
3072 (file-exists-p file))
3073 ;; It's not unique, but user wants shortest match.
3074 (insert (if (file-directory-p file) dirsuffix filesuffix))
3075 (unless minibuffer-p
3076 (message "Completed shortest")))
3077 ((or comint-completion-autolist
3078 (string-equal filenondir completion))
3079 ;; It's not unique, list possible completions.
3080 (comint-dynamic-list-filename-completions))
3081 (t
3082 (unless minibuffer-p
3083 (message "Partially completed")))))))
3084 success))
3087 (defun comint-replace-by-expanded-filename ()
3088 "Dynamically expand and complete the filename at point.
3089 Replace the filename with an expanded, canonicalized and
3090 completed replacement, i.e. substituting environment
3091 variables (e.g. $HOME), `~'s, `..', and `.', and making the
3092 filename absolute. For expansion see `expand-file-name' and
3093 `substitute-in-file-name'. For completion see
3094 `comint-dynamic-complete-filename'."
3095 (interactive)
3096 (let ((filename (comint-match-partial-filename)))
3097 (when filename
3098 (replace-match (expand-file-name filename) t t)
3099 (comint-dynamic-complete-filename))))
3102 (defun comint-dynamic-simple-complete (stub candidates)
3103 "Dynamically complete STUB from CANDIDATES list.
3104 This function inserts completion characters at point by
3105 completing STUB from the strings in CANDIDATES. If completion is
3106 ambiguous, possibly show a completions listing in a separate
3107 buffer.
3109 Return nil if no completion was inserted.
3110 Return `sole' if completed with the only completion match.
3111 Return `shortest' if completed with the shortest match.
3112 Return `partial' if completed as far as possible.
3113 Return `listed' if a completion listing was shown.
3115 See also `comint-dynamic-complete-filename'."
3116 (let* ((completion-ignore-case (memq system-type '(ms-dos windows-nt cygwin)))
3117 (minibuffer-p (window-minibuffer-p (selected-window)))
3118 (suffix (cond ((not comint-completion-addsuffix) "")
3119 ((not (consp comint-completion-addsuffix)) " ")
3120 (t (cdr comint-completion-addsuffix))))
3121 (completions (all-completions stub candidates)))
3122 (cond ((null completions)
3123 (if minibuffer-p
3124 (minibuffer-message "No completions of %s" stub)
3125 (message "No completions of %s" stub))
3126 nil)
3127 ((= 1 (length completions)) ; Gotcha!
3128 (let ((completion (car completions)))
3129 (if (string-equal completion stub)
3130 (unless minibuffer-p
3131 (message "Sole completion"))
3132 (insert (substring completion (length stub)))
3133 (unless minibuffer-p
3134 (message "Completed")))
3135 (insert suffix)
3136 'sole))
3137 (t ; There's no unique completion.
3138 (let ((completion (try-completion stub candidates)))
3139 ;; Insert the longest substring.
3140 (insert (substring completion (length stub)))
3141 (cond ((and comint-completion-recexact comint-completion-addsuffix
3142 (string-equal stub completion)
3143 (member completion completions))
3144 ;; It's not unique, but user wants shortest match.
3145 (insert suffix)
3146 (unless minibuffer-p
3147 (message "Completed shortest"))
3148 'shortest)
3149 ((or comint-completion-autolist
3150 (string-equal stub completion))
3151 ;; It's not unique, list possible completions.
3152 (comint-dynamic-list-completions completions stub)
3153 'listed)
3154 (t
3155 (unless minibuffer-p
3156 (message "Partially completed"))
3157 'partial)))))))
3160 (defun comint-dynamic-list-filename-completions ()
3161 "Display a list of possible completions for the filename at point."
3162 (interactive)
3163 (let* ((completion-ignore-case read-file-name-completion-ignore-case)
3164 ;; If we bind this, it breaks remote directory tracking in rlogin.el.
3165 ;; I think it was originally bound to solve file completion problems,
3166 ;; but subsequent changes may have made this unnecessary. sm.
3167 ;;(file-name-handler-alist nil)
3168 (filename (or (comint-match-partial-filename) ""))
3169 (filedir (file-name-directory filename))
3170 (filenondir (file-name-nondirectory filename))
3171 (directory (if filedir (comint-directory filedir) default-directory))
3172 (completions (file-name-all-completions filenondir directory)))
3173 (if (not completions)
3174 (if (window-minibuffer-p (selected-window))
3175 (minibuffer-message "No completions of %s" filename)
3176 (message "No completions of %s" filename))
3177 (comint-dynamic-list-completions
3178 (mapcar 'comint-quote-filename completions)
3179 (comint-quote-filename filenondir)))))
3182 ;; This is bound locally in a *Completions* buffer to the list of
3183 ;; completions displayed, and is used to detect the case where the same
3184 ;; command is repeatedly used without the set of completions changing.
3185 (defvar comint-displayed-dynamic-completions nil)
3187 (defvar comint-dynamic-list-completions-config nil)
3189 (defun comint-dynamic-list-completions (completions &optional common-substring)
3190 "Display a list of sorted COMPLETIONS.
3191 The meaning of COMMON-SUBSTRING is the same as in `display-completion-list'.
3192 Typing SPC flushes the completions buffer."
3193 (let ((window (get-buffer-window "*Completions*" 0)))
3194 (setq completions (sort completions 'string-lessp))
3195 (if (and (eq last-command this-command)
3196 window (window-live-p window) (window-buffer window)
3197 (buffer-name (window-buffer window))
3198 ;; The above tests are not sufficient to detect the case where we
3199 ;; should scroll, because the top-level interactive command may
3200 ;; not have displayed a completions window the last time it was
3201 ;; invoked, and there may be such a window left over from a
3202 ;; previous completion command with a different set of
3203 ;; completions. To detect that case, we also test that the set
3204 ;; of displayed completions is in fact the same as the previously
3205 ;; displayed set.
3206 (equal completions
3207 (buffer-local-value 'comint-displayed-dynamic-completions
3208 (window-buffer window))))
3209 ;; If this command was repeated, and
3210 ;; there's a fresh completion window with a live buffer,
3211 ;; and this command is repeated, scroll that window.
3212 (with-current-buffer (window-buffer window)
3213 (if (pos-visible-in-window-p (point-max) window)
3214 (set-window-start window (point-min))
3215 (save-selected-window
3216 (select-window window)
3217 (scroll-up))))
3219 ;; Display a completion list for the first time.
3220 (setq comint-dynamic-list-completions-config
3221 (current-window-configuration))
3222 (with-output-to-temp-buffer "*Completions*"
3223 (display-completion-list completions common-substring))
3224 (if (window-minibuffer-p (selected-window))
3225 (minibuffer-message "Type space to flush; repeat completion command to scroll")
3226 (message "Type space to flush; repeat completion command to scroll")))
3228 ;; Read the next key, to process SPC.
3229 (let (key first)
3230 (if (with-current-buffer (get-buffer "*Completions*")
3231 (set (make-local-variable 'comint-displayed-dynamic-completions)
3232 completions)
3233 (setq key (read-key-sequence nil)
3234 first (aref key 0))
3235 (and (consp first) (consp (event-start first))
3236 (eq (window-buffer (posn-window (event-start first)))
3237 (get-buffer "*Completions*"))
3238 (eq (key-binding key) 'mouse-choose-completion)))
3239 ;; If the user does mouse-choose-completion with the mouse,
3240 ;; execute the command, then delete the completion window.
3241 (progn
3242 (choose-completion first)
3243 (set-window-configuration comint-dynamic-list-completions-config))
3244 (if (eq first ?\s)
3245 (set-window-configuration comint-dynamic-list-completions-config)
3246 (setq unread-command-events (listify-key-sequence key)))))))
3248 \f
3249 (defun comint-get-next-from-history ()
3250 "After fetching a line from input history, this fetches the following line.
3251 In other words, this recalls the input line after the line you recalled last.
3252 You can use this to repeat a sequence of input lines."
3253 (interactive)
3254 (if comint-save-input-ring-index
3255 (progn
3256 (setq comint-input-ring-index (1+ comint-save-input-ring-index))
3257 (comint-next-input 1))
3258 (message "No previous history command")))
3260 (defun comint-accumulate ()
3261 "Accumulate a line to send as input along with more lines.
3262 This inserts a newline so that you can enter more text
3264 to send all the accumulated input, at once.
3265 The entire accumulated text becomes one item in the input history
3266 when you send it."
3267 (interactive)
3269 (set-marker comint-accum-marker (point))
3270 (if comint-input-ring-index
3271 (setq comint-save-input-ring-index
3272 (- comint-input-ring-index 1))))
3274 (defun comint-goto-process-mark ()
3275 "Move point to the process mark.
3276 The process mark separates output, and input already sent,
3277 from input that has not yet been sent."
3278 (interactive)
3279 (let ((proc (or (get-buffer-process (current-buffer))
3280 (error "Current buffer has no process"))))
3281 (goto-char (process-mark proc))
3282 (when (called-interactively-p 'interactive)
3283 (message "Point is now at the process mark"))))
3285 (defun comint-bol-or-process-mark ()
3286 "Move point to beginning of line (after prompt) or to the process mark.
3287 The first time you use this command, it moves to the beginning of the line
3288 \(but after the prompt, if any). If you repeat it again immediately,
3289 it moves point to the process mark.
3291 The process mark separates the process output, along with input already sent,
3292 from input that has not yet been sent. Ordinarily, the process mark
3293 is at the beginning of the current input line; but if you have
3295 the process mark is at the beginning of the accumulated input."
3296 (interactive)
3297 (if (not (eq last-command 'comint-bol-or-process-mark))
3298 (comint-bol nil)
3299 (comint-goto-process-mark)))
3301 (defun comint-set-process-mark ()
3302 "Set the process mark at point."
3303 (interactive)
3304 (let ((proc (or (get-buffer-process (current-buffer))
3305 (error "Current buffer has no process"))))
3306 (set-marker (process-mark proc) (point))
3307 (message "Process mark set")))
3309 \f
3310 ;; Author: Peter Breton <pbreton@cs.umb.edu>
3312 ;; This little add-on for comint is intended to make it easy to get
3313 ;; output from currently active comint buffers into another buffer,
3314 ;; or buffers, and then go back to using the comint shell.
3315 ;;
3316 ;; My particular use is SQL interpreters; I want to be able to execute a
3317 ;; query using the process associated with a comint-buffer, and save that
3318 ;; somewhere else. Because the process might have state (for example, it
3319 ;; could be in an uncommitted transaction), just running starting a new
3320 ;; process and having it execute the query and then finish, would not
3321 ;; work. I'm sure there are other uses as well, although in many cases
3322 ;; starting a new process is the simpler, and thus preferable, approach.
3323 ;;
3324 ;; The basic implementation is as follows: comint-redirect changes the
3325 ;; preoutput filter functions (`comint-preoutput-filter-functions') to use
3326 ;; its own filter. The filter puts the output into the designated buffer,
3327 ;; or buffers, until it sees a regexp that tells it to stop (by default,
3328 ;; this is the prompt for the interpreter, `comint-prompt-regexp'). When it
3329 ;; sees the stop regexp, it restores the old filter functions, and runs
3330 ;; `comint-redirect-hook'.
3331 ;;
3332 ;; Each comint buffer may only use one redirection at a time, but any number
3333 ;; of different comint buffers may be simultaneously redirected.
3334 ;;
3335 ;; NOTE: It is EXTREMELY important that `comint-prompt-regexp' be set to the
3336 ;; correct prompt for your interpreter, or that you supply a regexp that says
3337 ;; when the redirection is finished. Otherwise, redirection will continue
3338 ;; indefinitely. The code now does a sanity check to ensure that it can find
3339 ;; a prompt in the comint buffer; however, it is still important to ensure that
3340 ;; this prompt is set correctly.
3341 ;;
3342 ;; XXX: This doesn't work so well unless `comint-prompt-regexp' is set;
3343 ;; perhaps it should prompt for a terminating string (with an
3344 ;; appropriate magic default by examining what we think is the prompt)?
3345 ;;
3346 ;; Fixme: look for appropriate fields, rather than regexp, if
3347 ;; `comint-use-prompt-regexp' is true.
3349 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3350 ;; Variables
3351 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3353 (defcustom comint-redirect-verbose nil
3354 "If non-nil, print messages each time the redirection filter is invoked.
3355 Also print a message when redirection is completed."
3356 :group 'comint
3357 :type 'boolean)
3359 ;; Directly analagous to comint-preoutput-filter-functions
3360 (defvar comint-redirect-filter-functions nil
3361 "List of functions to call before inserting redirected process output.
3362 Each function gets one argument, a string containing the text received
3363 from the subprocess. It should return the string to insert, perhaps
3364 the same string that was received, or perhaps a modified or transformed
3365 string.
3367 The functions on the list are called sequentially, and each one is given
3368 the string returned by the previous one. The string returned by the
3369 last function is the text that is actually inserted in the redirection buffer.
3371 You can use `add-hook' to add functions to this list
3372 either globally or locally.")
3374 ;; Internal variables
3376 (defvar comint-redirect-output-buffer nil
3377 "The buffer or list of buffers to put output into.")
3379 (defvar comint-redirect-finished-regexp nil
3380 "Regular expression that determines when to stop redirection in Comint.
3381 When the redirection filter function is given output that matches this regexp,
3382 the output is inserted as usual, and redirection is completed.")
3384 (defvar comint-redirect-insert-matching-regexp nil
3385 "If non-nil, the text that ends a redirection is included in it.
3386 More precisely, the text that matches `comint-redirect-finished-regexp'
3387 and therefore terminates an output redirection is inserted in the
3388 redirection target buffer, along with the preceding output.")
3390 (defvar comint-redirect-echo-input nil
3391 "Non-nil means echo input in the process buffer even during redirection.")
3393 (defvar comint-redirect-completed nil
3394 "Non-nil if redirection has completed in the current buffer.")
3396 (defvar comint-redirect-original-mode-line-process nil
3397 "Original mode line for redirected process.")
3399 (defvar comint-redirect-perform-sanity-check t
3400 "If non-nil, check that redirection is likely to complete successfully.
3401 More precisely, before starting a redirection, verify that the
3402 regular expression `comint-redirect-finished-regexp' that controls
3403 when to terminate it actually matches some text already in the process
3404 buffer. The idea is that this regular expression should match a prompt
3405 string, and that there ought to be at least one copy of your prompt string
3406 in the process buffer already.")
3408 (defvar comint-redirect-original-filter-function nil
3409 "The process filter that was in place when redirection is started.
3410 When redirection is completed, the process filter is restored to
3411 this value.")
3413 (defvar comint-redirect-subvert-readonly nil
3414 "Non-nil means `comint-redirect' can insert into read-only buffers.
3415 This works by binding `inhibit-read-only' around the insertion.
3416 This is useful, for instance, for insertion into Help mode buffers.
3417 You probably want to set it locally to the output buffer.")
3419 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3420 ;; Functions
3421 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3423 (defun comint-redirect-setup (output-buffer
3424 comint-buffer
3425 finished-regexp
3426 &optional echo-input)
3427 "Set up for output redirection.
3428 This function sets local variables that are used by `comint-redirect-filter'
3429 to perform redirection.
3431 Output from COMINT-BUFFER is redirected to OUTPUT-BUFFER, until something
3432 in the output matches FINISHED-REGEXP.
3434 If optional argument ECHO-INPUT is non-nil, output is echoed to the
3435 original Comint buffer.
3437 This function is called by `comint-redirect-send-command-to-process',
3438 and does not normally need to be invoked by the end user or programmer."
3439 (with-current-buffer comint-buffer
3441 (make-local-variable 'comint-redirect-original-mode-line-process)
3442 (setq comint-redirect-original-mode-line-process mode-line-process)
3444 (make-local-variable 'comint-redirect-output-buffer)
3445 (setq comint-redirect-output-buffer output-buffer)
3447 (make-local-variable 'comint-redirect-finished-regexp)
3448 (setq comint-redirect-finished-regexp finished-regexp)
3450 (make-local-variable 'comint-redirect-echo-input)
3451 (setq comint-redirect-echo-input echo-input)
3453 (make-local-variable 'comint-redirect-completed)
3454 (setq comint-redirect-completed nil)
3456 (setq mode-line-process
3457 (if mode-line-process
3458 (list (concat (elt mode-line-process 0) " Redirection"))
3459 (list ":%s Redirection")))))
3461 (defun comint-redirect-cleanup ()
3462 "End a Comint redirection. See `comint-redirect-send-command'."
3463 (interactive)
3464 ;; Restore the process filter
3465 (set-process-filter (get-buffer-process (current-buffer))
3466 comint-redirect-original-filter-function)
3467 ;; Restore the mode line
3468 (setq mode-line-process comint-redirect-original-mode-line-process)
3469 ;; Set the completed flag
3470 (setq comint-redirect-completed t))
3472 ;; Because the cleanup happens as a callback, it's not easy to guarantee
3473 ;; that it really occurs.
3474 (defalias 'comint-redirect-remove-redirection 'comint-redirect-cleanup)
3476 (defun comint-redirect-filter (process input-string)
3477 "Filter function which redirects output from PROCESS to a buffer or buffers.
3478 The variable `comint-redirect-output-buffer' says which buffer(s) to
3479 place output in.
3481 INPUT-STRING is the input from the Comint process.
3483 This function runs as a process filter, and does not need to be invoked by the
3484 end user."
3485 (and process
3486 (with-current-buffer (process-buffer process)
3487 (comint-redirect-preoutput-filter input-string)
3488 ;; If we have to echo output, give it to the original filter function
3489 (and comint-redirect-echo-input
3490 comint-redirect-original-filter-function
3491 (funcall comint-redirect-original-filter-function
3492 process input-string)))))
3495 (defun comint-redirect-preoutput-filter (input-string)
3496 "Comint filter function which redirects Comint output to a buffer or buffers.
3497 The variable `comint-redirect-output-buffer' says which buffer(s) to
3498 place output in.
3500 INPUT-STRING is the input from the Comint process.
3502 This function does not need to be invoked by the end user."
3503 (let ((output-buffer-list
3504 (if (listp comint-redirect-output-buffer)
3505 comint-redirect-output-buffer
3506 (list comint-redirect-output-buffer)))
3507 (filtered-input-string input-string))
3509 ;; If there are any filter functions, give them a chance to modify
3510 ;; the string.
3511 (let ((functions comint-redirect-filter-functions))
3512 (while (and functions filtered-input-string)
3513 (if (eq (car functions) t)
3514 ;; If a local value says "use the default value too",
3515 ;; do that.
3516 (let ((functions
3517 (default-value 'comint-redirect-filter-functions)))
3518 (while (and functions filtered-input-string)
3519 (setq filtered-input-string
3520 (funcall (car functions) filtered-input-string))
3521 (setq functions (cdr functions))))
3522 (setq filtered-input-string
3523 (funcall (car functions) filtered-input-string)))
3524 (setq functions (cdr functions))))
3526 ;; Clobber `comint-redirect-finished-regexp'
3527 (or comint-redirect-insert-matching-regexp
3528 (and (string-match comint-redirect-finished-regexp filtered-input-string)
3529 (setq filtered-input-string
3530 (replace-match "" nil nil filtered-input-string))))
3532 ;; Send output to all registered buffers
3533 (save-excursion
3534 (dolist (buf output-buffer-list)
3535 ;; Set this buffer to the output buffer
3536 (set-buffer (get-buffer-create buf))
3537 ;; Go to the end of the buffer
3538 (goto-char (point-max))
3539 ;; Insert the output
3540 (let ((inhibit-read-only comint-redirect-subvert-readonly))
3541 (insert filtered-input-string))))
3543 ;; Message
3544 (and comint-redirect-verbose
3545 (message "Redirected output to buffer(s) %s"
3546 (mapconcat 'identity output-buffer-list " ")))
3548 ;; If we see the prompt, tidy up
3549 ;; We'll look for the prompt in the original string, so nobody can
3550 ;; clobber it
3551 (and (string-match comint-redirect-finished-regexp input-string)
3552 (progn
3553 (and comint-redirect-verbose
3554 (message "Redirection completed"))
3555 (comint-redirect-cleanup)
3556 (run-hooks 'comint-redirect-hook)))
3557 ;; Echo input?
3558 (if comint-redirect-echo-input
3559 filtered-input-string
3560 "")))
3562 ;;;###autoload
3563 (defun comint-redirect-send-command (command output-buffer echo &optional no-display)
3564 "Send COMMAND to process in current buffer, with output to OUTPUT-BUFFER.
3565 With prefix arg ECHO, echo output in process buffer.
3567 If NO-DISPLAY is non-nil, do not show the output buffer."
3569 (let ((process (get-buffer-process (current-buffer))))
3570 (if process
3571 (comint-redirect-send-command-to-process
3572 command output-buffer (current-buffer) echo no-display)
3573 (error "No process for current buffer"))))
3575 ;;;###autoload
3576 (defun comint-redirect-send-command-to-process
3577 (command output-buffer process echo &optional no-display)
3578 "Send COMMAND to PROCESS, with output to OUTPUT-BUFFER.
3579 With prefix arg, echo output in process buffer.
3581 If NO-DISPLAY is non-nil, do not show the output buffer."
3583 (let* (;; The process buffer
3584 (process-buffer (if (processp process)
3585 (process-buffer process)
3586 process))
3587 (proc (get-buffer-process process-buffer)))
3588 ;; Change to the process buffer
3589 (with-current-buffer process-buffer
3591 ;; Make sure there's a prompt in the current process buffer
3592 (and comint-redirect-perform-sanity-check
3593 (save-excursion
3594 (goto-char (point-max))
3595 (or (re-search-backward comint-prompt-regexp nil t)
3596 (error "No prompt found or `comint-prompt-regexp' not set properly"))))
3598 ;; Set up for redirection
3599 (comint-redirect-setup
3600 output-buffer
3601 (current-buffer) ; Comint Buffer
3602 comint-prompt-regexp ; Finished Regexp
3603 echo) ; Echo input
3605 ;; Set the filter
3606 (setq comint-redirect-original-filter-function ; Save the old filter
3607 (process-filter proc))
3608 (set-process-filter proc 'comint-redirect-filter)
3610 ;; Send the command
3613 ;; Show the output
3614 (or no-display
3615 (display-buffer
3616 (get-buffer-create
3617 (if (listp output-buffer)
3618 (car output-buffer)
3619 output-buffer)))))))
3621 ;;;###autoload
3622 (defun comint-redirect-results-list (command regexp regexp-group)
3623 "Send COMMAND to current process.
3624 Return a list of expressions in the output which match REGEXP.
3625 REGEXP-GROUP is the regular expression group in REGEXP to use."
3626 (comint-redirect-results-list-from-process
3627 (get-buffer-process (current-buffer))
3628 command regexp regexp-group))
3630 ;;;###autoload
3631 (defun comint-redirect-results-list-from-process (process command regexp regexp-group)
3632 "Send COMMAND to PROCESS.
3633 Return a list of expressions in the output which match REGEXP.
3634 REGEXP-GROUP is the regular expression group in REGEXP to use."
3635 (let ((output-buffer " *Comint Redirect Work Buffer*")
3636 results)
3637 (with-current-buffer (get-buffer-create output-buffer)
3638 (erase-buffer)
3639 (comint-redirect-send-command-to-process command
3640 output-buffer process nil t)
3641 ;; Wait for the process to complete
3642 (set-buffer (process-buffer process))
3643 (while (null comint-redirect-completed)
3644 (accept-process-output nil 1))
3645 ;; Collect the output
3646 (set-buffer output-buffer)
3647 (goto-char (point-min))
3648 ;; Skip past the command, if it was echoed
3649 (and (looking-at command)
3650 (forward-line))
3651 (while (re-search-forward regexp nil t)
3652 (push (buffer-substring-no-properties
3653 (match-beginning regexp-group)
3654 (match-end regexp-group))
3655 results))
3656 results)))
3658 (dolist (x '("^Not at command line$"
3659 "^Empty input ring$"
3660 "^No history$"
3661 "^Not found$" ; Too common?
3662 "^Current buffer has no process$"))
3663 (add-to-list 'debug-ignored-errors x))
3665 \f
3666 ;; Converting process modes to use comint mode
3667 ;; ===========================================================================
3668 ;; The code in the Emacs 19 distribution has all been modified to use comint
3669 ;; where needed. However, there are `third-party' packages out there that
3670 ;; still use the old shell mode. Here's a guide to conversion.
3671 ;;
3672 ;; Renaming variables
3673 ;; Most of the work is renaming variables and functions. These are the common
3674 ;; ones:
3675 ;; Local variables:
3676 ;; last-input-start comint-last-input-start
3677 ;; last-input-end comint-last-input-end
3678 ;; shell-prompt-pattern comint-prompt-regexp
3679 ;; shell-set-directory-error-hook <no equivalent>
3680 ;; Miscellaneous:
3681 ;; shell-set-directory <unnecessary>
3682 ;; shell-mode-map comint-mode-map
3683 ;; Commands:
3684 ;; shell-send-input comint-send-input
3685 ;; shell-send-eof comint-delchar-or-maybe-eof
3686 ;; kill-shell-input comint-kill-input
3687 ;; interrupt-shell-subjob comint-interrupt-subjob
3688 ;; stop-shell-subjob comint-stop-subjob
3689 ;; quit-shell-subjob comint-quit-subjob
3690 ;; kill-shell-subjob comint-kill-subjob
3691 ;; kill-output-from-shell comint-delete-output
3692 ;; show-output-from-shell comint-show-output
3693 ;; copy-last-shell-input Use comint-previous-input/comint-next-input
3694 ;;
3695 ;; SHELL-SET-DIRECTORY is gone, its functionality taken over by
3696 ;; SHELL-DIRECTORY-TRACKER, the shell mode's comint-input-filter-functions.
3697 ;; Comint mode does not provide functionality equivalent to
3698 ;; shell-set-directory-error-hook; it is gone.
3699 ;;
3700 ;; comint-last-input-start is provided for modes which want to munge
3701 ;; the buffer after input is sent, perhaps because the inferior
3702 ;; insists on echoing the input. The LAST-INPUT-START variable in
3703 ;; the old shell package was used to implement a history mechanism,
3704 ;; but you should think twice before using comint-last-input-start
3705 ;; for this; the input history ring often does the job better.
3706 ;;
3707 ;; If you are implementing some process-in-a-buffer mode, called foo-mode, do
3708 ;; *not* create the comint-mode local variables in your foo-mode function.
3709 ;; This is not modular. Instead, call comint-mode, and let *it* create the
3710 ;; necessary comint-specific local variables. Then create the
3711 ;; foo-mode-specific local variables in foo-mode. Set the buffer's keymap to
3712 ;; be foo-mode-map, and its mode to be foo-mode. Set the comint-mode hooks
3713 ;; (comint-{prompt-regexp, input-filter, input-filter-functions,
3714 ;; get-old-input) that need to be different from the defaults. Call
3715 ;; foo-mode-hook, and you're done. Don't run the comint-mode hook yourself;
3716 ;; comint-mode will take care of it. The following example, from shell.el,
3717 ;; is typical:
3718 ;;
3719 ;; (defvar shell-mode-map '())
3720 ;; (cond ((not shell-mode-map)
3721 ;; (setq shell-mode-map (copy-keymap comint-mode-map))
3722 ;; (define-key shell-mode-map "\C-c\C-f" 'shell-forward-command)
3723 ;; (define-key shell-mode-map "\C-c\C-b" 'shell-backward-command)
3725 ;; (define-key shell-mode-map "\M-?"
3726 ;; 'comint-dynamic-list-filename-completions)))
3727 ;;
3728 ;; (defun shell-mode ()
3729 ;; (interactive)
3730 ;; (comint-mode)
3731 ;; (setq comint-prompt-regexp shell-prompt-pattern)
3732 ;; (setq major-mode 'shell-mode)
3733 ;; (setq mode-name "Shell")
3734 ;; (use-local-map shell-mode-map)
3735 ;; (make-local-variable 'shell-directory-stack)
3736 ;; (setq shell-directory-stack nil)
3737 ;; (add-hook 'comint-input-filter-functions 'shell-directory-tracker)
3738 ;; (run-mode-hooks 'shell-mode-hook))
3739 ;;
3740 ;;
3741 ;; Completion for comint-mode users
3742 ;;
3743 ;; For modes that use comint-mode, comint-dynamic-complete-functions is the
3744 ;; hook to add completion functions to. Functions on this list should return
3745 ;; non-nil if completion occurs (i.e., further completion should not occur).
3746 ;; You could use comint-dynamic-simple-complete to do the bulk of the
3747 ;; completion job.
3748 \f
3750 (provide 'comint)
3752 ;;; comint.el ends here