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1 ;;; comint.el --- general command interpreter in a window stuff
3 ;; Copyright (C) 1988, 1990, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 ;; 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 ;; Free Software Foundation, Inc.
7 ;; Author: Olin Shivers <shivers@cs.cmu.edu>
8 ;; Simon Marshall <simon@gnu.org>
9 ;; Maintainer: FSF
10 ;; Keywords: processes
11 ;; Package: emacs
13 ;; This file is part of GNU Emacs.
15 ;; GNU Emacs is free software: you can redistribute it and/or modify
16 ;; it under the terms of the GNU General Public License as published by
17 ;; the Free Software Foundation, either version 3 of the License, or
18 ;; (at your option) any later version.
20 ;; GNU Emacs is distributed in the hope that it will be useful,
21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 ;; GNU General Public License for more details.
25 ;; You should have received a copy of the GNU General Public License
26 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
28 ;;; Commentary:
30 ;; This file defines a general command-interpreter-in-a-buffer package
31 ;; (comint mode). The idea is that you can build specific process-in-a-buffer
32 ;; modes on top of comint mode -- e.g., Lisp, shell, scheme, T, soar, ....
33 ;; This way, all these specific packages share a common base functionality,
34 ;; and a common set of bindings, which makes them easier to use (and
35 ;; saves code, implementation time, etc., etc.).
37 ;; Several packages are already defined using comint mode:
38 ;; - shell.el defines a shell-in-a-buffer mode.
39 ;; - cmulisp.el defines a simple lisp-in-a-buffer mode.
40 ;;
41 ;; - The file cmuscheme.el defines a scheme-in-a-buffer mode.
42 ;; - The file tea.el tunes scheme and inferior-scheme modes for T.
43 ;; - The file soar.el tunes Lisp and inferior-lisp modes for Soar.
44 ;; - cmutex.el defines TeX and LaTeX modes that invoke TeX, LaTeX, BibTeX,
45 ;; previewers, and printers from within Emacs.
46 ;; - background.el allows csh-like job control inside Emacs.
47 ;; It is pretty easy to make new derived modes for other processes.
49 ;; For documentation on the functionality provided by Comint mode, and
50 ;; the hooks available for customising it, see the comments below.
51 ;; For further information on the standard derived modes (shell,
52 ;; inferior-lisp, inferior-scheme, ...), see the relevant source files.
54 ;; For hints on converting existing process modes (e.g., tex-mode,
55 ;; background, dbx, gdb, kermit, prolog, telnet) to use comint-mode
56 ;; instead of shell-mode, see the notes at the end of this file.
58 \f
59 ;; Brief Command Documentation:
60 ;;============================================================================
61 ;; Comint Mode Commands: (common to all derived modes, like shell & cmulisp
62 ;; mode)
63 ;;
64 ;; M-p comint-previous-input Cycle backwards in input history
65 ;; M-n comint-next-input Cycle forwards
66 ;; M-r comint-history-isearch-backward-regexp Isearch input regexp backward
67 ;; M-C-l comint-show-output Show last batch of process output
68 ;; RET comint-send-input
69 ;; C-d comint-delchar-or-maybe-eof Delete char unless at end of buff
70 ;; C-c C-a comint-bol-or-process-mark First time, move point to bol;
71 ;; second time, move to process-mark.
72 ;; C-c C-u comint-kill-input ^u
73 ;; C-c C-w backward-kill-word ^w
74 ;; C-c C-c comint-interrupt-subjob ^c
75 ;; C-c C-z comint-stop-subjob ^z
76 ;; C-c C-\ comint-quit-subjob ^\
77 ;; C-c C-o comint-delete-output Delete last batch of process output
78 ;; C-c C-r comint-show-output Show last batch of process output
79 ;; C-c C-l comint-dynamic-list-input-ring List input history
80 ;;
81 ;; Not bound by default in comint-mode (some are in shell mode)
82 ;; comint-run Run a program under comint-mode
83 ;; send-invisible Read a line w/o echo, and send to proc
84 ;; comint-dynamic-complete-filename Complete filename at point.
85 ;; comint-dynamic-list-filename-completions List completions in help buffer.
86 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
87 ;; replace with expanded/completed name.
88 ;; comint-replace-by-expanded-history Expand history at point;
89 ;; replace with expanded name.
90 ;; comint-magic-space Expand history and add (a) space(s).
91 ;; comint-kill-subjob No mercy.
92 ;; comint-show-maximum-output Show as much output as possible.
93 ;; comint-continue-subjob Send CONT signal to buffer's process
94 ;; group. Useful if you accidentally
95 ;; suspend your process (with C-c C-z).
96 ;; comint-get-next-from-history Fetch successive input history lines
97 ;; comint-accumulate Combine lines to send them together
98 ;; as input.
99 ;; comint-goto-process-mark Move point to where process-mark is.
100 ;; comint-set-process-mark Set process-mark to point.
102 ;; comint-mode-hook is the Comint mode hook. Basically for your keybindings.
104 ;;; Code:
107 \f
108 ;; Buffer Local Variables:
109 ;;============================================================================
110 ;; Comint mode buffer local variables:
111 ;; comint-prompt-regexp string comint-bol uses to match prompt
112 ;; comint-delimiter-argument-list list For delimiters and arguments
113 ;; comint-last-input-start marker Handy if inferior always echoes
114 ;; comint-last-input-end marker For comint-delete-output command
115 ;; comint-input-ring-size integer For the input history
116 ;; comint-input-ring ring mechanism
117 ;; comint-input-ring-index number ...
118 ;; comint-save-input-ring-index number ...
119 ;; comint-input-autoexpand symbol ...
120 ;; comint-input-ignoredups boolean ...
121 ;; comint-dynamic-complete-functions hook For the completion mechanism
122 ;; comint-completion-fignore list ...
123 ;; comint-file-name-chars string ...
124 ;; comint-file-name-quote-list list ...
125 ;; comint-get-old-input function Hooks for specific
126 ;; comint-input-filter-functions hook process-in-a-buffer
127 ;; comint-output-filter-functions hook function modes.
128 ;; comint-preoutput-filter-functions hook
129 ;; comint-input-filter function ...
130 ;; comint-input-sender function ...
131 ;; comint-eol-on-send boolean ...
132 ;; comint-process-echoes boolean ...
133 ;; comint-scroll-to-bottom-on-input symbol For scroll behavior
134 ;; comint-move-point-for-output symbol ...
135 ;; comint-scroll-show-maximum-output boolean ...
136 ;; comint-accum-marker maker For comint-accumulate
137 ;;
138 ;; Comint mode non-buffer local variables:
139 ;; comint-completion-addsuffix boolean/cons For file name
140 ;; comint-completion-autolist boolean completion behavior
141 ;; comint-completion-recexact boolean ...
144 "General command interpreter in a window stuff."
148 "Completion facilities in comint."
152 "Source finding facilities in comint."
157 "Regexp to recognize prompts in the inferior process.
160 This variable is only used if the variable
161 `comint-use-prompt-regexp' is non-nil.
163 Good choices:
174 "If non-nil, the comint prompt is read only.
175 The read only region includes the newline before the prompt.
176 This does not affect existing prompts.
177 Certain derived modes may override this option.
179 If you set this option to t, then the safe way to temporarily
180 override the read-only-ness of comint prompts is to call
181 `comint-kill-whole-line' or `comint-kill-region' with no
182 narrowing in effect. This way you will be certain that none of
183 the remaining prompts will be accidentally messed up. You may
184 wish to put something like the following in your `.emacs' file:
186 \(add-hook 'comint-mode-hook
187 (lambda ()
189 (define-key comint-mode-map [C-S-backspace]
190 'comint-kill-whole-line)))
192 If you sometimes use comint-mode on text-only terminals or with `emacs -nw',
193 you might wish to use another binding for `comint-kill-whole-line'."
199 "List of characters to recognize as separate arguments in input.
200 Strings comprising a character in this list will separate the arguments
201 surrounding them, and also be regarded as arguments in their own right (unlike
202 whitespace). See `comint-arguments'.
203 Defaults to the empty list.
210 "If non-nil, expand input command history references on completion.
211 This mirrors the optional behavior of tcsh (its autoexpand and histlist).
213 If the value is `input', then the expansion is seen on input.
214 If the value is `history', then the expansion is only when inserting
215 into the buffer's input ring. See also `comint-magic-space' and
216 `comint-dynamic-complete'.
218 This variable is buffer-local."
226 "Face to use to highlight user input."
233 "Face to use to highlight prompts."
237 "If non-nil, don't add input matching the last on the input ring.
238 This mirrors the optional behavior of bash.
240 This variable is buffer-local."
245 "If non-nil, name of the file to read/write input history.
246 See also `comint-read-input-ring' and `comint-write-input-ring'.
248 This variable is buffer-local, and is a good thing to set in mode hooks."
250 file)
254 "Controls whether input to interpreter causes window to scroll.
255 If nil, then do not scroll. If t or `all', scroll all windows showing buffer.
256 If `this', scroll only the selected window.
258 The default is nil.
260 See `comint-preinput-scroll-to-bottom'. This variable is buffer-local."
268 "Controls whether interpreter output moves point to the end of the output.
269 If nil, then output never moves point to the output.
270 (If the output occurs at point, it is inserted before point.)
271 If t or `all', move point in all windows showing the buffer.
272 If `this', move point only the selected window.
273 If `others', move point only in other windows, not in the selected window.
275 The default is nil.
277 See the variable `comint-scroll-show-maximum-output' and the function
278 `comint-postoutput-scroll-to-bottom'.
279 This variable is buffer-local in all Comint buffers."
290 "Controls how to scroll due to interpreter output.
291 This variable applies when point is at the end of the buffer
292 \(either because it was originally there, or because
293 `comint-move-point-for-output' said to move it there)
294 and output from the subprocess is inserted.
296 Non-nil means scroll so that the window is full of text
297 and point is on the last line. A value of nil
298 means don't do anything special--scroll normally.
300 See also the variable `comint-move-point-for-output' and the function
301 `comint-postoutput-scroll-to-bottom'.
302 This variable is buffer-local in all Comint buffers."
307 "The maximum size in lines for Comint buffers.
308 Comint buffers are truncated from the top to be no greater than this number, if
309 the function `comint-truncate-buffer' is on `comint-output-filter-functions'."
314 "Size of the input history ring in `comint-mode'."
326 "If non-nil, assume that the subprocess echoes any input.
327 If so, delete one copy of the input so that only one copy eventually
328 appears in the buffer.
330 This variable is buffer-local."
334 ;; AIX puts the name of the person being su'd to in front of the prompt.
335 ;; kinit prints a prompt like `Password for devnull@GNU.ORG: '.
336 ;; ksu prints a prompt like `Kerberos password for devnull/root@GNU.ORG: '.
337 ;; ssh-add prints a prompt like `Enter passphrase: '.
338 ;; plink prints a prompt like `Passphrase for key "root@GNU.ORG": '.
339 ;; Ubuntu's sudo prompts like `[sudo] password for user:'
340 ;; Some implementations of passwd use "Password (again)" as the 2nd prompt.
341 ;; Something called "perforce" uses "Enter password:".
354 "Regexp matching prompts for passwords in the inferior process.
355 This is used by `comint-watch-for-password-prompt'."
359 ;; Here are the per-interpreter hooks.
361 "Function that returns old text in Comint mode.
362 This function is called when return is typed while the point is in old
363 text. It returns the text to be submitted as process input. The
364 default is `comint-get-old-input-default', which either grabs the
365 current input field or grabs the current line and strips off leading
366 text matching `comint-prompt-regexp', depending on the value of
371 "List of functions called to perform completion.
372 Functions should return non-nil if completion was performed.
373 See also `comint-dynamic-complete'.
379 "Predicate for filtering additions to input history.
380 Takes one argument, the input. If non-nil, the input may be saved on the input
384 "Abnormal hook run before input is sent to the process.
387 ;;;###autoload
388 (defvar comint-output-filter-functions '(comint-postoutput-scroll-to-bottom comint-watch-for-password-prompt)
389 "Functions to call after output is inserted into the buffer.
390 One possible function is `comint-postoutput-scroll-to-bottom'.
391 These functions get one argument, a string containing the text as originally
392 inserted. Note that this might not be the same as the buffer contents between
393 `comint-last-output-start' and the buffer's `process-mark', if other filter
394 functions have already modified the buffer.
396 See also `comint-preoutput-filter-functions'.
398 You can use `add-hook' to add functions to this list
405 "Function to actually send to PROCESS the STRING submitted by user.
406 Usually this is just `comint-simple-send', but if your mode needs to
407 massage the input string, put a different function here.
408 `comint-simple-send' just sends the string plus a newline.
409 \(If `comint-input-sender-no-newline' is non-nil, it omits the newline.)
413 "Non-nil means go to the end of the line before sending input.
414 See `comint-send-input'."
418 ;; Note: If it is decided to purge comint-prompt-regexp from the source
419 ;; entirely, searching for uses of this variable will help to identify
420 ;; places that need attention.
422 "If non-nil, use `comint-prompt-regexp' to recognize prompts.
423 If nil, then program output and user-input are given different `field'
424 properties, which Emacs commands can use to distinguish them (in
425 particular, common movement commands such as `beginning-of-line'
426 respect field boundaries in a natural way)."
430 ;; Autoload is necessary for Custom to recognize old alias.
431 ;;;###autoload
436 "Hook run upon entry to `comint-mode'.
437 This is run before the process is cranked up."
442 "Hook run each time a process is exec'd by `comint-exec'.
443 This is called after the process is cranked up. It is useful for things that
444 must be done each time a process is executed in a Comint mode buffer (e.g.,
445 `(process-kill-without-query)'). In contrast, the `comint-mode-hook' is only
446 executed once when the buffer is created."
452 ;; Keys:
463 ;; The following two are standardly aliased to C-d,
464 ;; but they should never do EOF, just delete.
466 (define-key map [kp-delete] 'delete-char)
467 (define-key map "\C-c " 'comint-accumulate)
468 (define-key map "\C-c\C-x" 'comint-get-next-from-history)
469 (define-key map "\C-c\C-a" 'comint-bol-or-process-mark)
470 (define-key map "\C-c\C-u" 'comint-kill-input)
471 (define-key map "\C-c\C-w" 'backward-kill-word)
472 (define-key map "\C-c\C-c" 'comint-interrupt-subjob)
473 (define-key map "\C-c\C-z" 'comint-stop-subjob)
475 (define-key map "\C-c\C-m" 'comint-copy-old-input)
476 (define-key map "\C-c\C-o" 'comint-delete-output)
477 (define-key map "\C-c\C-r" 'comint-show-output)
478 (define-key map "\C-c\C-e" 'comint-show-maximum-output)
479 (define-key map "\C-c\C-l" 'comint-dynamic-list-input-ring)
480 (define-key map "\C-c\C-n" 'comint-next-prompt)
481 (define-key map "\C-c\C-p" 'comint-previous-prompt)
482 (define-key map "\C-c\C-d" 'comint-send-eof)
483 (define-key map "\C-c\C-s" 'comint-write-output)
484 (define-key map "\C-c." 'comint-insert-previous-argument)
485 ;; Mouse Buttons:
486 (define-key map [mouse-2] 'comint-insert-input)
487 ;; Menu bars:
488 ;; completion:
489 (define-key map [menu-bar completion]
490 (cons "Complete" (make-sparse-keymap "Complete")))
491 (define-key map [menu-bar completion complete-expand]
492 '("Expand File Name" . comint-replace-by-expanded-filename))
493 (define-key map [menu-bar completion complete-listing]
494 '("File Completion Listing" . comint-dynamic-list-filename-completions))
495 (define-key map [menu-bar completion complete-file]
496 '("Complete File Name" . comint-dynamic-complete-filename))
497 (define-key map [menu-bar completion complete]
498 '("Complete Before Point" . comint-dynamic-complete))
499 ;; Input history:
500 (define-key map [menu-bar inout]
501 (cons "In/Out" (make-sparse-keymap "In/Out")))
502 (define-key map [menu-bar inout delete-output]
503 '("Delete Current Output Group" . comint-delete-output))
504 (define-key map [menu-bar inout append-output-to-file]
505 '("Append Current Output Group to File" . comint-append-output-to-file))
506 (define-key map [menu-bar inout write-output]
507 '("Write Current Output Group to File" . comint-write-output))
508 (define-key map [menu-bar inout next-prompt]
509 '("Forward Output Group" . comint-next-prompt))
510 (define-key map [menu-bar inout previous-prompt]
511 '("Backward Output Group" . comint-previous-prompt))
512 (define-key map [menu-bar inout show-maximum-output]
513 '("Show Maximum Output" . comint-show-maximum-output))
514 (define-key map [menu-bar inout show-output]
515 '("Show Current Output Group" . comint-show-output))
516 (define-key map [menu-bar inout kill-input]
517 '("Kill Current Input" . comint-kill-input))
518 (define-key map [menu-bar inout copy-input]
519 '("Copy Old Input" . comint-copy-old-input))
520 (define-key map [menu-bar inout history-isearch-backward-regexp]
521 '("Isearch Input Regexp Backward..." . comint-history-isearch-backward-regexp))
522 (define-key map [menu-bar inout history-isearch-backward]
523 '("Isearch Input String Backward..." . comint-history-isearch-backward))
524 (define-key map [menu-bar inout forward-matching-history]
525 '("Forward Matching Input..." . comint-forward-matching-input))
526 (define-key map [menu-bar inout backward-matching-history]
527 '("Backward Matching Input..." . comint-backward-matching-input))
528 (define-key map [menu-bar inout next-matching-history]
529 '("Next Matching Input..." . comint-next-matching-input))
530 (define-key map [menu-bar inout previous-matching-history]
531 '("Previous Matching Input..." . comint-previous-matching-input))
532 (define-key map [menu-bar inout next-matching-history-from-input]
533 '("Next Matching Current Input" . comint-next-matching-input-from-input))
534 (define-key map [menu-bar inout previous-matching-history-from-input]
535 '("Previous Matching Current Input" . comint-previous-matching-input-from-input))
536 (define-key map [menu-bar inout next-history]
537 '("Next Input" . comint-next-input))
538 (define-key map [menu-bar inout previous-history]
539 '("Previous Input" . comint-previous-input))
540 (define-key map [menu-bar inout list-history]
541 '("List Input History" . comint-dynamic-list-input-ring))
542 (define-key map [menu-bar inout expand-history]
543 '("Expand History Before Point" . comint-replace-by-expanded-history))
544 ;; Signals
545 (let ((signals-map (make-sparse-keymap "Signals")))
546 (define-key map [menu-bar signals] (cons "Signals" signals-map))
547 (define-key signals-map [eof] '("EOF" . comint-send-eof))
548 (define-key signals-map [kill] '("KILL" . comint-kill-subjob))
549 (define-key signals-map [quit] '("QUIT" . comint-quit-subjob))
550 (define-key signals-map [cont] '("CONT" . comint-continue-subjob))
551 (define-key signals-map [stop] '("STOP" . comint-stop-subjob))
552 (define-key signals-map [break] '("BREAK" . comint-interrupt-subjob)))
553 ;; Put them in the menu bar:
554 (setq menu-bar-final-items (append '(completion inout signals)
555 menu-bar-final-items))
556 map))
558 ;; Fixme: Is this still relevant?
559 (defvar comint-ptyp t
560 "Non-nil if communications via pty; false if by pipe. Buffer local.
561 This is to work around a bug in Emacs process signaling.")
563 (defvar comint-input-ring nil)
564 (defvar comint-last-input-start nil)
565 (defvar comint-last-input-end nil)
566 (defvar comint-last-output-start nil)
567 (defvar comint-input-ring-index nil
568 "Index of last matched history element.")
569 (defvar comint-matching-input-from-input-string ""
570 "Input previously used to match input history.")
571 (defvar comint-save-input-ring-index nil
572 "Last input ring index which you copied.
575 (defvar comint-accum-marker nil
576 "Non-nil if you are accumulating input lines to send as input together.
579 (defvar comint-stored-incomplete-input nil
580 "Stored input for history cycling.")
582 (put 'comint-replace-by-expanded-history 'menu-enable 'comint-input-autoexpand)
583 (put 'comint-input-ring 'permanent-local t)
584 (put 'comint-input-ring-index 'permanent-local t)
585 (put 'comint-save-input-ring-index 'permanent-local t)
586 (put 'comint-input-autoexpand 'permanent-local t)
587 (put 'comint-input-filter-functions 'permanent-local t)
588 (put 'comint-output-filter-functions 'permanent-local t)
589 (put 'comint-preoutput-filter-functions 'permanent-local t)
590 (put 'comint-scroll-to-bottom-on-input 'permanent-local t)
591 (put 'comint-move-point-for-output 'permanent-local t)
592 (put 'comint-scroll-show-maximum-output 'permanent-local t)
593 (put 'comint-ptyp 'permanent-local t)
595 (put 'comint-mode 'mode-class 'special)
597 (define-derived-mode comint-mode fundamental-mode "Comint"
598 "Major mode for interacting with an inferior interpreter.
599 Interpreter name is same as buffer name, sans the asterisks.
600 Return at end of buffer sends line as input.
601 Return not at end copies rest of line to end and sends it.
602 Setting variable `comint-eol-on-send' means jump to the end of the line
603 before submitting new input.
605 This mode is customized to create major modes such as Inferior Lisp
606 mode, Shell mode, etc. This can be done by setting the hooks
607 `comint-input-filter-functions', `comint-input-filter', `comint-input-sender'
608 and `comint-get-old-input' to appropriate functions, and the variable
609 `comint-prompt-regexp' to the appropriate regular expression.
611 An input history is maintained of size `comint-input-ring-size', and
612 can be accessed with the commands \\[comint-next-input], \\[comint-previous-input], and \\[comint-dynamic-list-input-ring].
613 Input ring history expansion can be achieved with the commands
615 Input ring expansion is controlled by the variable `comint-input-autoexpand',
616 and addition is controlled by the variable `comint-input-ignoredups'.
618 Commands with no default key bindings include `send-invisible',
619 `comint-dynamic-complete', `comint-dynamic-list-filename-completions', and
620 `comint-magic-space'.
622 Input to, and output from, the subprocess can cause the window to scroll to
623 the end of the buffer. See variables `comint-output-filter-functions',
624 `comint-preoutput-filter-functions', `comint-scroll-to-bottom-on-input',
625 and `comint-move-point-for-output'.
628 to continue it.
632 Entry to this mode runs the hooks on `comint-mode-hook'."
633 (setq mode-line-process '(":%s"))
634 (set (make-local-variable 'window-point-insertion-type) t)
635 (set (make-local-variable 'comint-last-input-start) (point-min-marker))
636 (set (make-local-variable 'comint-last-input-end) (point-min-marker))
637 (set (make-local-variable 'comint-last-output-start) (make-marker))
638 (make-local-variable 'comint-last-prompt-overlay)
639 (make-local-variable 'comint-prompt-regexp) ; Don't set; default
640 (make-local-variable 'comint-input-ring-size) ; ...to global val.
641 (make-local-variable 'comint-input-ring)
642 (make-local-variable 'comint-input-ring-file-name)
643 (or (and (boundp 'comint-input-ring) comint-input-ring)
644 (setq comint-input-ring (make-ring comint-input-ring-size)))
645 (make-local-variable 'comint-input-ring-index)
646 (make-local-variable 'comint-save-input-ring-index)
647 (or (and (boundp 'comint-input-ring-index) comint-input-ring-index)
648 (setq comint-input-ring-index nil))
649 (or (and (boundp 'comint-save-input-ring-index) comint-save-input-ring-index)
650 (setq comint-save-input-ring-index nil))
651 (make-local-variable 'comint-matching-input-from-input-string)
652 (make-local-variable 'comint-input-autoexpand)
653 (make-local-variable 'comint-input-ignoredups)
654 (make-local-variable 'comint-delimiter-argument-list)
655 (make-local-variable 'comint-completion-fignore)
656 (make-local-variable 'comint-get-old-input)
657 (make-local-variable 'comint-input-filter)
658 (make-local-variable 'comint-input-sender)
659 (make-local-variable 'comint-eol-on-send)
660 (make-local-variable 'comint-scroll-to-bottom-on-input)
661 (make-local-variable 'comint-move-point-for-output)
662 (make-local-variable 'comint-scroll-show-maximum-output)
663 (make-local-variable 'comint-stored-incomplete-input)
664 ;; Following disabled because it seems to break the case when
665 ;; comint-scroll-show-maximum-output is nil, and no-one can remember
666 ;; what the original problem was. If there are problems with point
667 ;; not going to the end, consider re-enabling this.
668 ;; http://lists.gnu.org/archive/html/emacs-devel/2007-08/msg00827.html
669 ;;
670 ;; This makes it really work to keep point at the bottom.
671 ;; (make-local-variable 'scroll-conservatively)
672 ;; (setq scroll-conservatively 10000)
673 (add-hook 'pre-command-hook 'comint-preinput-scroll-to-bottom t t)
674 (make-local-variable 'comint-ptyp)
675 (make-local-variable 'comint-process-echoes)
676 (make-local-variable 'comint-file-name-chars)
677 (make-local-variable 'comint-file-name-quote-list)
678 ;; dir tracking on remote files
679 (set (make-local-variable 'comint-file-name-prefix)
680 (or (file-remote-p default-directory) ""))
681 (make-local-variable 'comint-accum-marker)
682 (setq comint-accum-marker (make-marker))
683 (make-local-variable 'font-lock-defaults)
684 (setq font-lock-defaults '(nil t))
685 (add-hook 'change-major-mode-hook 'font-lock-defontify nil t)
686 (add-hook 'isearch-mode-hook 'comint-history-isearch-setup nil t)
687 ;; This behavior is not useful in comint buffers, and is annoying
688 (set (make-local-variable 'next-line-add-newlines) nil))
690 (defun comint-check-proc (buffer)
691 "Return non-nil if there is a living process associated w/buffer BUFFER.
692 Living means the status is `open', `run', or `stop'.
693 BUFFER can be either a buffer or the name of one."
694 (let ((proc (get-buffer-process buffer)))
695 (and proc (memq (process-status proc) '(open run stop)))))
697 ;;;###autoload
698 (defun make-comint-in-buffer (name buffer program &optional startfile &rest switches)
699 "Make a Comint process NAME in BUFFER, running PROGRAM.
700 If BUFFER is nil, it defaults to NAME surrounded by `*'s.
701 PROGRAM should be either a string denoting an executable program to create
702 via `start-file-process', or a cons pair of the form (HOST . SERVICE) denoting
703 a TCP connection to be opened via `open-network-stream'. If there is already
704 a running process in that buffer, it is not restarted. Optional fourth arg
705 STARTFILE is the name of a file, whose contents are sent to the
706 process as its initial input.
708 If PROGRAM is a string, any more args are arguments to PROGRAM.
710 Returns the (possibly newly created) process buffer."
711 (or (fboundp 'start-file-process)
712 (error "Multi-processing is not supported for this system"))
713 (setq buffer (get-buffer-create (or buffer (concat "*" name "*"))))
714 ;; If no process, or nuked process, crank up a new one and put buffer in
715 ;; comint mode. Otherwise, leave buffer and existing process alone.
716 (unless (comint-check-proc buffer)
717 (with-current-buffer buffer
718 (unless (derived-mode-p 'comint-mode)
719 (comint-mode))) ; Install local vars, mode, keymap, ...
720 (comint-exec buffer name program startfile switches))
721 buffer)
723 ;;;###autoload
724 (defun make-comint (name program &optional startfile &rest switches)
725 "Make a Comint process NAME in a buffer, running PROGRAM.
726 The name of the buffer is made by surrounding NAME with `*'s.
727 PROGRAM should be either a string denoting an executable program to create
728 via `start-file-process', or a cons pair of the form (HOST . SERVICE) denoting
729 a TCP connection to be opened via `open-network-stream'. If there is already
730 a running process in that buffer, it is not restarted. Optional third arg
731 STARTFILE is the name of a file, whose contents are sent to the
732 process as its initial input.
734 If PROGRAM is a string, any more args are arguments to PROGRAM.
736 Returns the (possibly newly created) process buffer."
737 (apply #'make-comint-in-buffer name nil program startfile switches))
739 ;;;###autoload
740 (defun comint-run (program)
741 "Run PROGRAM in a Comint buffer and switch to it.
742 The buffer name is made by surrounding the file name of PROGRAM with `*'s.
743 The file name is used to make a symbol name, such as `comint-sh-hook', and any
744 hooks on this symbol are run in the buffer.
745 See `make-comint' and `comint-exec'."
746 (interactive "sRun program: ")
747 (let ((name (file-name-nondirectory program)))
748 (switch-to-buffer (make-comint name program))
749 (run-hooks (intern-soft (concat "comint-" name "-hook")))))
751 (defun comint-exec (buffer name command startfile switches)
752 "Start up a process named NAME in buffer BUFFER for Comint modes.
753 Runs the given COMMAND with SWITCHES, and initial input from STARTFILE.
754 Blasts any old process running in the buffer. Doesn't set the buffer mode.
755 You can use this to cheaply run a series of processes in the same Comint
756 buffer. The hook `comint-exec-hook' is run after each exec."
757 (with-current-buffer buffer
758 (let ((proc (get-buffer-process buffer))) ; Blast any old process.
759 (if proc (delete-process proc)))
760 ;; Crank up a new process
761 (let ((proc
762 (if (consp command)
763 (open-network-stream name buffer (car command) (cdr command))
764 (comint-exec-1 name buffer command switches))))
765 (set-process-filter proc 'comint-output-filter)
766 (make-local-variable 'comint-ptyp)
767 (setq comint-ptyp process-connection-type) ; t if pty, nil if pipe.
768 ;; Jump to the end, and set the process mark.
769 (goto-char (point-max))
770 (set-marker (process-mark proc) (point))
771 ;; Feed it the startfile.
772 (cond (startfile
773 ;;This is guaranteed to wait long enough
774 ;;but has bad results if the comint does not prompt at all
775 ;; (while (= size (buffer-size))
776 ;; (sleep-for 1))
777 ;;I hope 1 second is enough!
778 (sleep-for 1)
779 (goto-char (point-max))
780 (insert-file-contents startfile)
781 (setq startfile (buffer-substring (point) (point-max)))
782 (delete-region (point) (point-max))
783 (comint-send-string proc startfile)))
784 (run-hooks 'comint-exec-hook)
785 buffer)))
787 ;; This auxiliary function cranks up the process for comint-exec in
788 ;; the appropriate environment.
790 (defun comint-exec-1 (name buffer command switches)
791 (let ((process-environment
792 (nconc
793 ;; If using termcap, we specify `emacs' as the terminal type
794 ;; because that lets us specify a width.
795 ;; If using terminfo, we specify `dumb' because that is
796 ;; a defined terminal type. `emacs' is not a defined terminal type
797 ;; and there is no way for us to define it here.
798 ;; Some programs that use terminfo get very confused
799 ;; if TERM is not a valid terminal type.
800 ;; ;; There is similar code in compile.el.
801 (if (and (boundp 'system-uses-terminfo) system-uses-terminfo)
802 (list "TERM=dumb" "TERMCAP="
803 (format "COLUMNS=%d" (window-width)))
804 (list "TERM=emacs"
805 (format "TERMCAP=emacs:co#%d:tc=unknown:" (window-width))))
806 (unless (getenv "EMACS")
807 (list "EMACS=t"))
808 (list (format "INSIDE_EMACS=%s,comint" emacs-version))
809 process-environment))
810 (default-directory
811 (if (file-accessible-directory-p default-directory)
812 default-directory
813 "/"))
814 proc decoding encoding changed)
815 (let ((exec-path (if (and command (file-name-directory command))
816 ;; If the command has slashes, make sure we
817 ;; first look relative to the current directory.
818 (cons default-directory exec-path) exec-path)))
819 (setq proc (apply 'start-file-process name buffer command switches)))
820 ;; Some file name handler cannot start a process, fe ange-ftp.
821 (unless (processp proc) (error "No process started"))
822 (let ((coding-systems (process-coding-system proc)))
823 (setq decoding (car coding-systems)
824 encoding (cdr coding-systems)))
825 ;; Even if start-file-process left the coding system for encoding data
826 ;; sent from the process undecided, we had better use the same one
827 ;; as what we use for decoding. But, we should suppress EOL
828 ;; conversion.
829 (if (and decoding (not encoding))
830 (setq encoding (coding-system-change-eol-conversion decoding 'unix)
831 changed t))
832 (if changed
833 (set-process-coding-system proc decoding encoding))
834 proc))
836 (defun comint-insert-input (event)
837 "In a Comint buffer, set the current input to the previous input at point.
838 If there is no previous input at point, run the command specified
839 by the global keymap (usually `mouse-yank-at-click')."
840 (interactive "e")
841 ;; Don't set the mouse here, since it may otherwise change the behavior
842 ;; of the command on which we fallback if there's no field at point.
843 ;; (mouse-set-point event)
844 (let ((pos (posn-point (event-end event)))
845 field input)
846 (with-selected-window (posn-window (event-end event))
847 ;; If pos is at the very end of a field, the mouse-click was
848 ;; probably outside (to the right) of the field.
849 (and (< pos (field-end pos))
850 (setq field (field-at-pos pos))
851 (setq input (field-string-no-properties pos))))
852 (if (or (null comint-accum-marker)
853 (not (eq field 'input)))
854 ;; Fall back to the global definition if (i) the selected
855 ;; buffer is not a comint buffer (which can happen if a
856 ;; non-comint window was selected and we clicked in a comint
857 ;; window), or (ii) there is no input at POS.
858 (let* ((keys (this-command-keys))
859 (last-key (and (vectorp keys) (aref keys (1- (length keys)))))
860 (fun (and last-key (lookup-key global-map (vector last-key)))))
861 (and fun (not (eq fun 'comint-insert-input))
862 (call-interactively fun)))
863 (with-selected-window (posn-window (event-end event))
864 ;; Otherwise, insert the previous input.
865 (goto-char (point-max))
866 ;; First delete any old unsent input at the end
867 (delete-region
868 (or (marker-position comint-accum-marker)
869 (process-mark (get-buffer-process (current-buffer))))
870 (point))
871 ;; Insert the input at point
872 (insert input)))))
873 \f
874 ;; Input history processing in a buffer
875 ;; ===========================================================================
876 ;; Useful input history functions, courtesy of the Ergo group.
878 ;; Eleven commands:
879 ;; comint-dynamic-list-input-ring List history in help buffer.
880 ;; comint-previous-input Previous input...
881 ;; comint-previous-matching-input ...matching a string.
882 ;; comint-previous-matching-input-from-input ... matching the current input.
883 ;; comint-next-input Next input...
884 ;; comint-next-matching-input ...matching a string.
885 ;; comint-next-matching-input-from-input ... matching the current input.
886 ;; comint-backward-matching-input Backwards input...
887 ;; comint-forward-matching-input ...matching a string.
888 ;; comint-replace-by-expanded-history Expand history at point;
889 ;; replace with expanded history.
890 ;; comint-magic-space Expand history and insert space.
891 ;;
892 ;; Three functions:
893 ;; comint-read-input-ring Read into comint-input-ring...
894 ;; comint-write-input-ring Write to comint-input-ring-file-name.
895 ;; comint-replace-by-expanded-history-before-point Workhorse function.
897 (defun comint-read-input-ring (&optional silent)
898 "Set the buffer's `comint-input-ring' from a history file.
899 The name of the file is given by the variable `comint-input-ring-file-name'.
900 The history ring is of size `comint-input-ring-size', regardless of file size.
901 If `comint-input-ring-file-name' is nil this function does nothing.
903 If the optional argument SILENT is non-nil, we say nothing about a
904 failure to read the history file.
906 This function is useful for major mode commands and mode hooks.
908 The commands stored in the history file are separated by the
909 `comint-input-ring-separator', and entries that match
910 `comint-input-history-ignore' are ignored. The most recent command
911 comes last.
913 See also `comint-input-ignoredups' and `comint-write-input-ring'."
914 (cond ((or (null comint-input-ring-file-name)
915 (equal comint-input-ring-file-name ""))
916 nil)
917 ((not (file-readable-p comint-input-ring-file-name))
918 (or silent
919 (message "Cannot read history file %s"
920 comint-input-ring-file-name)))
921 (t
922 (let* ((history-buf (get-buffer-create " *temp*"))
923 (file comint-input-ring-file-name)
924 (count 0)
925 (size comint-input-ring-size)
926 (ring (make-ring size)))
927 (unwind-protect
928 (with-current-buffer history-buf
929 (widen)
930 (erase-buffer)
931 (insert-file-contents file)
932 ;; Save restriction in case file is already visited...
933 ;; Watch for those date stamps in history files!
934 (goto-char (point-max))
935 (let (start end history)
936 (while (and (< count size)
937 (re-search-backward comint-input-ring-separator
938 nil t)
939 (setq end (match-beginning 0)))
940 (setq start
941 (if (re-search-backward comint-input-ring-separator
942 nil t)
943 (match-end 0)
944 (point-min)))
945 (setq history (buffer-substring start end))
946 (goto-char start)
947 (if (and (not (string-match comint-input-history-ignore
948 history))
949 (or (null comint-input-ignoredups)
950 (ring-empty-p ring)
951 (not (string-equal (ring-ref ring 0)
952 history))))
953 (progn
954 (ring-insert-at-beginning ring history)
955 (setq count (1+ count)))))))
956 (kill-buffer history-buf))
957 (setq comint-input-ring ring
958 comint-input-ring-index nil)))))
960 (defun comint-write-input-ring ()
961 "Writes the buffer's `comint-input-ring' to a history file.
962 The name of the file is given by the variable `comint-input-ring-file-name'.
963 The original contents of the file are lost if `comint-input-ring' is not empty.
964 If `comint-input-ring-file-name' is nil this function does nothing.
966 Useful within process sentinels.
968 See also `comint-read-input-ring'."
969 (cond ((or (null comint-input-ring-file-name)
970 (equal comint-input-ring-file-name "")
971 (null comint-input-ring) (ring-empty-p comint-input-ring))
972 nil)
973 ((not (file-writable-p comint-input-ring-file-name))
974 (message "Cannot write history file %s" comint-input-ring-file-name))
975 (t
976 (let* ((history-buf (get-buffer-create " *Temp Input History*"))
977 (ring comint-input-ring)
978 (file comint-input-ring-file-name)
979 (index (ring-length ring)))
980 ;; Write it all out into a buffer first. Much faster, but messier,
981 ;; than writing it one line at a time.
982 (with-current-buffer history-buf
983 (erase-buffer)
984 (while (> index 0)
985 (setq index (1- index))
986 (insert (ring-ref ring index) comint-input-ring-separator))
987 (write-region (buffer-string) nil file nil 'no-message)
988 (kill-buffer nil))))))
991 (defvar comint-dynamic-list-input-ring-window-conf)
993 (defun comint-dynamic-list-input-ring-select ()
994 "Choose the input history entry that point is in or next to."
995 (interactive)
996 (let ((buffer completion-reference-buffer)
997 beg end completion)
998 (if (and (not (eobp)) (get-text-property (point) 'mouse-face))
999 (setq end (point) beg (1+ (point))))
1000 (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
1001 (setq end (1- (point)) beg (point)))
1002 (if (null beg)
1003 (error "No history entry here"))
1004 (setq beg (previous-single-property-change beg 'mouse-face))
1005 (setq end (or (next-single-property-change end 'mouse-face) (point-max)))
1006 (setq completion (buffer-substring beg end))
1007 (set-window-configuration comint-dynamic-list-input-ring-window-conf)
1008 (choose-completion-string completion buffer)))
1010 (defun comint-dynamic-list-input-ring ()
1011 "List in help buffer the buffer's input history."
1012 (interactive)
1013 (if (or (not (ring-p comint-input-ring))
1014 (ring-empty-p comint-input-ring))
1015 (message "No history")
1016 (let ((history nil)
1017 (history-buffer " *Input History*")
1018 (index (1- (ring-length comint-input-ring)))
1019 (conf (current-window-configuration)))
1020 ;; We have to build up a list ourselves from the ring vector.
1021 (dotimes (index (ring-length comint-input-ring))
1022 (push (ring-ref comint-input-ring index) history))
1023 ;; Show them most-recent-first.
1024 (setq history (nreverse history))
1025 ;; Change "completion" to "history reference"
1026 ;; to make the display accurate.
1027 (with-output-to-temp-buffer history-buffer
1028 (display-completion-list history)
1029 (set-buffer history-buffer)
1030 (let ((keymap (make-sparse-keymap)))
1031 (set-keymap-parent keymap (current-local-map))
1032 (define-key keymap "\C-m" 'comint-dynamic-list-input-ring-select)
1033 (use-local-map keymap))
1034 (forward-line 3)
1035 (while (search-backward "completion" nil 'move)
1036 (replace-match "history reference")))
1037 (sit-for 0)
1038 (message "Hit space to flush")
1039 (setq comint-dynamic-list-input-ring-window-conf conf)
1040 (let ((ch (read-event)))
1041 (if (eq ch ?\s)
1042 (set-window-configuration conf)
1043 (setq unread-command-events (list ch)))))))
1046 (defun comint-regexp-arg (prompt)
1047 "Return list of regexp and prefix arg using PROMPT."
1048 (let* (;; Don't clobber this.
1049 (last-command last-command)
1050 (regexp (read-from-minibuffer prompt nil nil nil
1051 'minibuffer-history-search-history)))
1052 ;; If the user didn't enter anything, nothing is added to m-h-s-h.
1053 ;; Use the previous search regexp, if there is one.
1054 (list (if (string-equal regexp "")
1055 (or (car minibuffer-history-search-history)
1056 regexp)
1057 regexp)
1058 (prefix-numeric-value current-prefix-arg))))
1060 (defun comint-search-arg (arg)
1061 ;; First make sure there is a ring and that we are after the process mark
1062 (cond ((not (comint-after-pmark-p))
1063 (error "Not at command line"))
1064 ((or (null comint-input-ring)
1065 (ring-empty-p comint-input-ring))
1066 (error "Empty input ring"))
1067 ((zerop arg)
1068 ;; arg of zero resets search from beginning, and uses arg of 1
1069 (setq comint-input-ring-index nil)
1070 1)
1071 (t
1072 arg)))
1074 (defun comint-restore-input ()
1075 "Restore unfinished input."
1076 (interactive)
1077 (when comint-input-ring-index
1078 (comint-delete-input)
1079 (when (> (length comint-stored-incomplete-input) 0)
1080 (insert comint-stored-incomplete-input)
1081 (message "Input restored"))
1082 (setq comint-input-ring-index nil)))
1084 (defun comint-search-start (arg)
1085 "Index to start a directional search, starting at `comint-input-ring-index'."
1086 (if comint-input-ring-index
1087 ;; If a search is running, offset by 1 in direction of arg
1088 (mod (+ comint-input-ring-index (if (> arg 0) 1 -1))
1089 (ring-length comint-input-ring))
1090 ;; For a new search, start from beginning or end, as appropriate
1091 (if (>= arg 0)
1092 0 ; First elt for forward search
1093 (1- (ring-length comint-input-ring))))) ; Last elt for backward search
1095 (defun comint-previous-input-string (arg)
1096 "Return the string ARG places along the input ring.
1097 Moves relative to `comint-input-ring-index'."
1098 (ring-ref comint-input-ring (if comint-input-ring-index
1099 (mod (+ arg comint-input-ring-index)
1100 (ring-length comint-input-ring))
1101 arg)))
1103 (defun comint-previous-input (arg)
1104 "Cycle backwards through input history, saving input."
1105 (interactive "*p")
1106 (if (and comint-input-ring-index
1107 (or ;; leaving the "end" of the ring
1108 (and (< arg 0) ; going down
1109 (eq comint-input-ring-index 0))
1110 (and (> arg 0) ; going up
1111 (eq comint-input-ring-index
1112 (1- (ring-length comint-input-ring)))))
1113 comint-stored-incomplete-input)
1114 (comint-restore-input)
1115 (comint-previous-matching-input "." arg)))
1117 (defun comint-next-input (arg)
1118 "Cycle forwards through input history."
1119 (interactive "*p")
1120 (comint-previous-input (- arg)))
1122 (defun comint-previous-matching-input-string (regexp arg)
1123 "Return the string matching REGEXP ARG places along the input ring.
1124 Moves relative to `comint-input-ring-index'."
1125 (let* ((pos (comint-previous-matching-input-string-position regexp arg)))
1126 (if pos (ring-ref comint-input-ring pos))))
1128 (defun comint-previous-matching-input-string-position (regexp arg &optional start)
1129 "Return the index matching REGEXP ARG places along the input ring.
1130 Moves relative to START, or `comint-input-ring-index'."
1131 (if (or (not (ring-p comint-input-ring))
1132 (ring-empty-p comint-input-ring))
1133 (error "No history"))
1134 (let* ((len (ring-length comint-input-ring))
1135 (motion (if (> arg 0) 1 -1))
1136 (n (mod (- (or start (comint-search-start arg)) motion) len))
1137 (tried-each-ring-item nil)
1138 (prev nil))
1139 ;; Do the whole search as many times as the argument says.
1140 (while (and (/= arg 0) (not tried-each-ring-item))
1141 ;; Step once.
1142 (setq prev n
1143 n (mod (+ n motion) len))
1144 ;; If we haven't reached a match, step some more.
1145 (while (and (< n len) (not tried-each-ring-item)
1146 (not (string-match regexp (ring-ref comint-input-ring n))))
1147 (setq n (mod (+ n motion) len)
1148 ;; If we have gone all the way around in this search.
1149 tried-each-ring-item (= n prev)))
1150 (setq arg (if (> arg 0) (1- arg) (1+ arg))))
1151 ;; Now that we know which ring element to use, if we found it, return that.
1152 (if (string-match regexp (ring-ref comint-input-ring n))
1153 n)))
1155 (defun comint-delete-input ()
1156 "Delete all input between accumulation or process mark and point."
1157 (delete-region
1158 ;; Can't use kill-region as it sets this-command
1159 (or (marker-position comint-accum-marker)
1160 (process-mark (get-buffer-process (current-buffer))))
1161 (point-max)))
1163 (defun comint-previous-matching-input (regexp n)
1164 "Search backwards through input history for match for REGEXP.
1165 \(Previous history elements are earlier commands.)
1166 With prefix argument N, search for Nth previous match.
1167 If N is negative, find the next or Nth next match."
1168 (interactive (comint-regexp-arg "Previous input matching (regexp): "))
1169 (setq n (comint-search-arg n))
1170 (let ((pos (comint-previous-matching-input-string-position regexp n)))
1171 ;; Has a match been found?
1172 (if (null pos)
1173 (error "Not found")
1174 ;; If leaving the edit line, save partial input
1175 (if (null comint-input-ring-index) ;not yet on ring
1176 (setq comint-stored-incomplete-input
1177 (funcall comint-get-old-input)))
1178 (setq comint-input-ring-index pos)
1179 (message "History item: %d" (1+ pos))
1180 (comint-delete-input)
1181 (insert (ring-ref comint-input-ring pos)))))
1183 (defun comint-next-matching-input (regexp n)
1184 "Search forwards through input history for match for REGEXP.
1185 \(Later history elements are more recent commands.)
1186 With prefix argument N, search for Nth following match.
1187 If N is negative, find the previous or Nth previous match."
1188 (interactive (comint-regexp-arg "Next input matching (regexp): "))
1189 (comint-previous-matching-input regexp (- n)))
1191 (defun comint-previous-matching-input-from-input (n)
1192 "Search backwards through input history for match for current input.
1193 \(Previous history elements are earlier commands.)
1194 With prefix argument N, search for Nth previous match.
1195 If N is negative, search forwards for the -Nth following match."
1196 (interactive "p")
1197 (if (not (memq last-command '(comint-previous-matching-input-from-input
1198 comint-next-matching-input-from-input)))
1199 ;; Starting a new search
1200 (setq comint-matching-input-from-input-string
1201 (buffer-substring
1202 (or (marker-position comint-accum-marker)
1203 (process-mark (get-buffer-process (current-buffer))))
1204 (point))
1205 comint-input-ring-index nil))
1206 (comint-previous-matching-input
1207 (concat "^" (regexp-quote comint-matching-input-from-input-string))
1208 n))
1210 (defun comint-next-matching-input-from-input (n)
1211 "Search forwards through input history for match for current input.
1212 \(Following history elements are more recent commands.)
1213 With prefix argument N, search for Nth following match.
1214 If N is negative, search backwards for the -Nth previous match."
1215 (interactive "p")
1216 (comint-previous-matching-input-from-input (- n)))
1219 (defun comint-replace-by-expanded-history (&optional silent start)
1220 "Expand input command history references before point.
1221 Expansion is dependent on the value of `comint-input-autoexpand'.
1223 This function depends on the buffer's idea of the input history, which may not
1224 match the command interpreter's idea, assuming it has one.
1226 Assumes history syntax is like typical Un*x shells'. However, since Emacs
1227 cannot know the interpreter's idea of input line numbers, assuming it has one,
1228 it cannot expand absolute input line number references.
1230 If the optional argument SILENT is non-nil, never complain
1231 even if history reference seems erroneous.
1233 If the optional argument START is non-nil, that specifies the
1234 start of the text to scan for history references, rather
1235 than the logical beginning of line.
1237 See `comint-magic-space' and `comint-replace-by-expanded-history-before-point'.
1239 Returns t if successful."
1240 (interactive)
1241 (if (and comint-input-autoexpand
1242 (if comint-use-prompt-regexp
1243 ;; Use comint-prompt-regexp
1244 (save-excursion
1245 (beginning-of-line)
1247 ;; Use input fields. User input that hasn't been entered
1248 ;; yet, at the end of the buffer, has a nil `field' property.
1249 (and (null (get-char-property (point) 'field))
1251 ;; Looks like there might be history references in the command.
1252 (let ((previous-modified-tick (buffer-modified-tick)))
1253 (comint-replace-by-expanded-history-before-point silent start)
1254 (/= previous-modified-tick (buffer-modified-tick)))))
1257 (defun comint-replace-by-expanded-history-before-point (silent &optional start)
1258 "Expand directory stack reference before point.
1259 See `comint-replace-by-expanded-history'. Returns t if successful.
1261 If the optional argument START is non-nil, that specifies the
1262 start of the text to scan for history references, rather
1263 than the logical beginning of line."
1264 (save-excursion
1265 (let ((toend (- (line-end-position) (point)))
1266 (start (or start (comint-line-beginning-position))))
1267 (goto-char start)
1268 (while (progn
1269 (skip-chars-forward "^!^" (- (line-end-position) toend))
1270 (< (point) (- (line-end-position) toend)))
1271 ;; This seems a bit complex. We look for references such as !!, !-num,
1272 ;; !foo, !?foo, !{bar}, !?{bar}, ^oh, ^my^, ^god^it, ^never^ends^.
1273 ;; If that wasn't enough, the plings can be suffixed with argument
1274 ;; range specifiers.
1275 ;; Argument ranges are complex too, so we hive off the input line,
1276 ;; referenced with plings, with the range string to `comint-args'.
1277 (setq comint-input-ring-index nil)
1279 (comint-within-quotes start (point)))
1280 ;; The history is quoted, or we're in quotes.
1281 (goto-char (1+ (point))))
1283 ;; We cannot know the interpreter's idea of input line numbers.
1284 (goto-char (match-end 0))
1285 (message "Absolute reference cannot be expanded"))
1287 ;; Just a number of args from `number' lines backward.
1288 (let ((number (1- (string-to-number
1289 (buffer-substring (match-beginning 1)
1290 (match-end 1))))))
1291 (if (<= number (ring-length comint-input-ring))
1292 (progn
1293 (replace-match
1294 (comint-args (comint-previous-input-string number)
1295 (match-beginning 2) (match-end 2))
1296 t t)
1297 (setq comint-input-ring-index number)
1298 (message "History item: %d" (1+ number)))
1299 (goto-char (match-end 0))
1300 (message "Relative reference exceeds input history size"))))
1302 ;; Just a number of args from the previous input line.
1303 (replace-match (comint-previous-input-string 0) t t)
1304 (message "History item: previous"))
1305 ((looking-at
1307 ;; Most recent input starting with or containing (possibly
1308 ;; protected) string, maybe just a number of args. Phew.
1309 (let* ((mb1 (match-beginning 1)) (me1 (match-end 1))
1310 (mb2 (match-beginning 2)) (me2 (match-end 2))
1311 (exp (buffer-substring (or mb2 mb1) (or me2 me1)))
1313 (pos (save-match-data
1314 (comint-previous-matching-input-string-position
1315 (concat pref (regexp-quote exp)) 1))))
1316 (if (null pos)
1317 (progn
1318 (goto-char (match-end 0))
1319 (or silent
1320 (progn (message "Not found")
1321 (ding))))
1322 (setq comint-input-ring-index pos)
1323 (replace-match
1324 (comint-args (ring-ref comint-input-ring pos)
1325 (match-beginning 4) (match-end 4))
1326 t t)
1327 (message "History item: %d" (1+ pos)))))
1329 ;; Quick substitution on the previous input line.
1330 (let ((old (buffer-substring (match-beginning 1) (match-end 1)))
1331 (new (buffer-substring (match-beginning 2) (match-end 2)))
1332 (pos nil))
1333 (replace-match (comint-previous-input-string 0) t t)
1334 (setq pos (point))
1335 (goto-char (match-beginning 0))
1336 (if (not (search-forward old pos t))
1337 (or silent
1338 (error "Not found"))
1339 (replace-match new t t)
1340 (message "History item: substituted"))))
1341 (t
1342 (forward-char 1)))))))
1345 (defun comint-magic-space (arg)
1346 "Expand input history references before point and insert ARG spaces.
1347 A useful command to bind to SPC. See `comint-replace-by-expanded-history'."
1348 (interactive "p")
1349 (comint-replace-by-expanded-history)
1350 (self-insert-command arg))
1351 \f
1352 ;; Isearch in comint input history
1354 (defcustom comint-history-isearch nil
1355 "Non-nil to Isearch in input history only, not in comint buffer output.
1356 If t, usual Isearch keys like `C-r' and `C-M-r' in comint mode search
1357 in the input history.
1358 If `dwim', Isearch keys search in the input history only when initial
1359 point position is at the comint command line. When starting Isearch
1360 from other parts of the comint buffer, they search in the comint buffer.
1361 If nil, Isearch operates on the whole comint buffer."
1362 :type '(choice (const :tag "Don't search in input history" nil)
1363 (const :tag "When point is on command line initially, search history" dwim)
1364 (const :tag "Always search in input history" t))
1365 :group 'comint
1366 :version "23.2")
1368 (defun comint-history-isearch-backward ()
1369 "Search for a string backward in input history using Isearch."
1370 (interactive)
1371 (let ((comint-history-isearch t))
1372 (isearch-backward)))
1374 (defun comint-history-isearch-backward-regexp ()
1375 "Search for a regular expression backward in input history using Isearch."
1376 (interactive)
1377 (let ((comint-history-isearch t))
1378 (isearch-backward-regexp)))
1380 (defvar comint-history-isearch-message-overlay nil)
1381 (make-variable-buffer-local 'comint-history-isearch-message-overlay)
1383 (defun comint-history-isearch-setup ()
1384 "Set up a comint for using Isearch to search the input history.
1385 Intended to be added to `isearch-mode-hook' in `comint-mode'."
1386 (when (or (eq comint-history-isearch t)
1387 (and (eq comint-history-isearch 'dwim)
1388 ;; Point is at command line.
1389 (comint-after-pmark-p)))
1390 (setq isearch-message-prefix-add "history ")
1391 (set (make-local-variable 'isearch-search-fun-function)
1392 'comint-history-isearch-search)
1393 (set (make-local-variable 'isearch-message-function)
1394 'comint-history-isearch-message)
1395 (set (make-local-variable 'isearch-wrap-function)
1396 'comint-history-isearch-wrap)
1397 (set (make-local-variable 'isearch-push-state-function)
1398 'comint-history-isearch-push-state)
1399 (add-hook 'isearch-mode-end-hook 'comint-history-isearch-end nil t)))
1401 (defun comint-history-isearch-end ()
1402 "Clean up the comint after terminating Isearch in comint."
1403 (if comint-history-isearch-message-overlay
1404 (delete-overlay comint-history-isearch-message-overlay))
1405 (setq isearch-message-prefix-add nil)
1406 (setq isearch-search-fun-function nil)
1407 (setq isearch-message-function nil)
1408 (setq isearch-wrap-function nil)
1409 (setq isearch-push-state-function nil)
1410 (remove-hook 'isearch-mode-end-hook 'comint-history-isearch-end t))
1412 (defun comint-goto-input (pos)
1413 "Put input history item of the absolute history position POS."
1414 ;; If leaving the edit line, save partial unfinished input.
1415 (if (null comint-input-ring-index)
1416 (setq comint-stored-incomplete-input
1417 (funcall comint-get-old-input)))
1418 (setq comint-input-ring-index pos)
1419 (comint-delete-input)
1420 (if (and pos (not (ring-empty-p comint-input-ring)))
1421 (insert (ring-ref comint-input-ring pos))
1422 ;; Restore partial unfinished input.
1423 (when (> (length comint-stored-incomplete-input) 0)
1424 (insert comint-stored-incomplete-input))))
1426 (defun comint-history-isearch-search ()
1427 "Return the proper search function, for Isearch in input history."
1428 (cond
1429 (isearch-word
1430 (if isearch-forward 'word-search-forward 'word-search-backward))
1431 (t
1432 (lambda (string bound noerror)
1433 (let ((search-fun
1434 ;; Use standard functions to search within comint text
1435 (cond
1436 (isearch-regexp
1437 (if isearch-forward 're-search-forward 're-search-backward))
1438 (t
1439 (if isearch-forward 'search-forward 'search-backward))))
1440 found)
1441 ;; Avoid lazy-highlighting matches in the comint prompt and in the
1442 ;; output when searching forward. Lazy-highlight calls this lambda
1443 ;; with the bound arg, so skip the prompt and the output.
1444 (if (and bound isearch-forward (not (comint-after-pmark-p)))
1445 (goto-char (process-mark (get-buffer-process (current-buffer)))))
1446 (or
1447 ;; 1. First try searching in the initial comint text
1448 (funcall search-fun string
1449 (if isearch-forward bound (comint-line-beginning-position))
1450 noerror)
1451 ;; 2. If the above search fails, start putting next/prev history
1452 ;; elements in the comint successively, and search the string
1453 ;; in them. Do this only when bound is nil (i.e. not while
1454 ;; lazy-highlighting search strings in the current comint text).
1455 (unless bound
1456 (condition-case nil
1457 (progn
1458 (while (not found)
1459 (cond (isearch-forward
1460 ;; Signal an error here explicitly, because
1461 ;; `comint-next-input' doesn't signal an error.
1462 (when (null comint-input-ring-index)
1463 (error "End of history; no next item"))
1464 (comint-next-input 1)
1465 (goto-char (comint-line-beginning-position)))
1466 (t
1467 ;; Signal an error here explicitly, because
1468 ;; `comint-previous-input' doesn't signal an error.
1469 (when (eq comint-input-ring-index
1470 (1- (ring-length comint-input-ring)))
1471 (error "Beginning of history; no preceding item"))
1472 (comint-previous-input 1)
1473 (goto-char (point-max))))
1474 (setq isearch-barrier (point) isearch-opoint (point))
1475 ;; After putting the next/prev history element, search
1476 ;; the string in them again, until comint-next-input
1477 ;; or comint-previous-input raises an error at the
1478 ;; beginning/end of history.
1479 (setq found (funcall search-fun string
1480 (unless isearch-forward
1481 ;; For backward search, don't search
1482 ;; in the comint prompt
1483 (comint-line-beginning-position))
1484 noerror)))
1485 ;; Return point of the new search result
1486 (point))
1487 ;; Return nil on the error "no next/preceding item"
1488 (error nil)))))))))
1490 (defun comint-history-isearch-message (&optional c-q-hack ellipsis)
1491 "Display the input history search prompt.
1492 If there are no search errors, this function displays an overlay with
1493 the Isearch prompt which replaces the original comint prompt.
1494 Otherwise, it displays the standard Isearch message returned from
1495 `isearch-message'."
1496 (if (not (and isearch-success (not isearch-error)))
1497 ;; Use standard function `isearch-message' when not in comint prompt,
1498 ;; or search fails, or has an error (like incomplete regexp).
1499 ;; This function displays isearch message in the echo area,
1500 ;; so it's possible to see what is wrong in the search string.
1501 (isearch-message c-q-hack ellipsis)
1502 ;; Otherwise, put the overlay with the standard isearch prompt over
1503 ;; the initial comint prompt.
1504 (if (overlayp comint-history-isearch-message-overlay)
1505 (move-overlay comint-history-isearch-message-overlay
1506 (save-excursion (forward-line 0) (point))
1507 (comint-line-beginning-position))
1508 (setq comint-history-isearch-message-overlay
1509 (make-overlay (save-excursion (forward-line 0) (point))
1510 (comint-line-beginning-position)))
1511 (overlay-put comint-history-isearch-message-overlay 'evaporate t))
1512 (overlay-put comint-history-isearch-message-overlay
1513 'display (isearch-message-prefix c-q-hack ellipsis))
1514 ;; And clear any previous isearch message.
1515 (message "")))
1517 (defun comint-history-isearch-wrap ()
1518 "Wrap the input history search when search fails.
1519 Move point to the first history element for a forward search,
1520 or to the last history element for a backward search."
1521 (unless isearch-word
1522 ;; When `comint-history-isearch-search' fails on reaching the
1523 ;; beginning/end of the history, wrap the search to the first/last
1524 ;; input history element.
1525 (if isearch-forward
1526 (comint-goto-input (1- (ring-length comint-input-ring)))
1527 (comint-goto-input nil))
1528 (setq isearch-success t))
1529 (goto-char (if isearch-forward (comint-line-beginning-position) (point-max))))
1531 (defun comint-history-isearch-push-state ()
1532 "Save a function restoring the state of input history search.
1533 Save `comint-input-ring-index' to the additional state parameter
1534 in the search status stack."
1535 `(lambda (cmd)
1536 (comint-history-isearch-pop-state cmd ,comint-input-ring-index)))
1538 (defun comint-history-isearch-pop-state (cmd hist-pos)
1539 "Restore the input history search state.
1540 Go to the history element by the absolute history position HIST-POS."
1541 (comint-goto-input hist-pos))
1543 \f
1544 (defun comint-within-quotes (beg end)
1545 "Return t if the number of quotes between BEG and END is odd.
1546 Quotes are single and double."
1549 (or (= (mod countsq 2) 1) (= (mod countdq 2) 1))))
1551 (defun comint-how-many-region (regexp beg end)
1552 "Return number of matches for REGEXP from BEG to END."
1553 (let ((count 0))
1554 (save-excursion
1555 (save-match-data
1556 (goto-char beg)
1557 (while (re-search-forward regexp end t)
1558 (setq count (1+ count)))))
1559 count))
1561 (defun comint-args (string begin end)
1562 ;; From STRING, return the args depending on the range specified in the text
1563 ;; from BEGIN to END. If BEGIN is nil, assume all args. Ignore leading `:'.
1564 ;; Range can be x-y, x-, -y, where x/y can be [0-9], *, ^, $.
1565 (save-match-data
1566 (if (null begin)
1567 (comint-arguments string 0 nil)
1568 (let* ((range (buffer-substring
1569 (if (eq (char-after begin) ?:) (1+ begin) begin) end))
1570 (nth (cond ((string-match "^[*^]" range) 1)
1571 ((string-match "^-" range) 0)
1572 ((string-equal range "$") nil)
1573 (t (string-to-number range))))
1574 (mth (cond ((string-match "[-*$]$" range) nil)
1575 ((string-match "-" range)
1576 (string-to-number (substring range (match-end 0))))
1577 (t nth))))
1578 (comint-arguments string nth mth)))))
1580 (defun comint-delim-arg (arg)
1581 "Return a list of arguments from ARG.
1582 Break it up at the delimiters in `comint-delimiter-argument-list'.
1583 Returned list is backwards.
1585 Characters with non-nil values of the text property `literal' are
1586 assumed to have literal values (e.g., backslash-escaped
1587 characters), and are not considered to be delimiters."
1588 (if (null comint-delimiter-argument-list)
1589 (list arg)
1590 (let ((args nil)
1591 (pos 0)
1592 (len (length arg)))
1593 (while (< pos len)
1594 (let ((char (aref arg pos))
1595 (start pos))
1596 (if (and (memq char comint-delimiter-argument-list)
1597 ;; Ignore backslash-escaped characters.
1598 (not (get-text-property pos 'literal arg)))
1599 (while (and (< pos len) (eq (aref arg pos) char))
1600 (setq pos (1+ pos)))
1601 (while (and (< pos len)
1602 (not (and (memq (aref arg pos)
1603 comint-delimiter-argument-list)
1604 (not (get-text-property
1605 pos 'literal arg)))))
1606 (setq pos (1+ pos))))
1607 (setq args (cons (substring arg start pos) args))))
1608 args)))
1610 (defun comint-arguments (string nth mth)
1611 "Return from STRING the NTH to MTH arguments.
1612 NTH and/or MTH can be nil, which means the last argument.
1613 Returned arguments are separated by single spaces.
1614 We assume whitespace separates arguments, except within quotes
1615 and except for a space or tab that immediately follows a backslash.
1616 Also, a run of one or more of a single character
1617 in `comint-delimiter-argument-list' is a separate argument.
1618 Argument 0 is the command name."
1619 ;; The first line handles ordinary characters and backslash-sequences
1620 ;; (except with w32 msdos-like shells, where backslashes are valid).
1621 ;; The second matches "-quoted strings.
1622 ;; The third matches '-quoted strings.
1623 ;; The fourth matches `-quoted strings.
1624 ;; This seems to fit the syntax of BASH 2.0.
1625 (let* ((backslash-escape (not (and (fboundp 'w32-shell-dos-semantics)
1626 (w32-shell-dos-semantics))))
1627 (first (if backslash-escape
1630 (argpart (concat first
1634 (quote-subexpr (if backslash-escape 2 1))
1635 (args ()) (pos 0)
1636 (count 0)
1637 beg str quotes)
1638 ;; Build a list of all the args until we have as many as we want.
1639 (while (and (or (null mth) (<= count mth))
1640 (string-match argpart string pos))
1641 ;; Apply the `literal' text property to backslash-escaped
1642 ;; characters, so that `comint-delim-arg' won't break them up.
1643 (and backslash-escape
1644 (match-beginning 1)
1645 (put-text-property (match-beginning 1) (match-end 1)
1646 'literal t string))
1647 (if (and beg (= pos (match-beginning 0)))
1648 ;; It's contiguous, part of the same arg.
1649 (setq pos (match-end 0)
1650 quotes (or quotes (match-beginning quote-subexpr)))
1651 ;; It's a new separate arg.
1652 (if beg
1653 ;; Put the previous arg, if there was one, onto ARGS.
1654 (setq str (substring string beg pos)
1655 args (if quotes (cons str args)
1656 (nconc (comint-delim-arg str) args))))
1657 (setq count (length args))
1658 (setq quotes (match-beginning quote-subexpr))
1659 (setq beg (match-beginning 0))
1660 (setq pos (match-end 0))))
1661 (if beg
1662 (setq str (substring string beg pos)
1663 args (if quotes (cons str args)
1664 (nconc (comint-delim-arg str) args))))
1665 (setq count (length args))
1666 (let ((n (or nth (1- count)))
1667 (m (if mth (1- (- count mth)) 0)))
1668 (mapconcat
1669 (function (lambda (a) a)) (nthcdr n (nreverse (nthcdr m args))) " "))))
1670 \f
1671 ;;
1672 ;; Input processing stuff
1673 ;;
1674 (defun comint-add-to-input-history (cmd)
1675 "Add CMD to the input history.
1676 Ignore duplicates if `comint-input-ignoredups' is non-nil."
1677 (if (and (funcall comint-input-filter cmd)
1678 (or (null comint-input-ignoredups)
1679 (not (ring-p comint-input-ring))
1680 (ring-empty-p comint-input-ring)
1681 (not (string-equal (ring-ref comint-input-ring 0)
1682 cmd))))
1683 (ring-insert comint-input-ring cmd)))
1685 (defun comint-send-input (&optional no-newline artificial)
1686 "Send input to process.
1687 After the process output mark, sends all text from the process mark to
1688 point as input to the process. Before the process output mark, calls
1689 value of variable `comint-get-old-input' to retrieve old input, copies
1690 it to the process mark, and sends it.
1692 This command also sends and inserts a final newline, unless
1693 NO-NEWLINE is non-nil.
1695 Any history reference may be expanded depending on the value of the variable
1696 `comint-input-autoexpand'. The list of function names contained in the value
1697 of `comint-input-filter-functions' is called on the input before sending it.
1698 The input is entered into the input history ring, if the value of variable
1699 `comint-input-filter' returns non-nil when called on the input.
1701 If variable `comint-eol-on-send' is non-nil, then point is moved to the
1702 end of line before sending the input.
1704 After the input has been sent, if `comint-process-echoes' is non-nil,
1705 then `comint-send-input' waits to see if the process outputs a string
1706 matching the input, and if so, deletes that part of the output.
1707 If ARTIFICIAL is non-nil, it inhibits such deletion.
1708 Callers sending input not from the user should use ARTIFICIAL = t.
1710 The values of `comint-get-old-input', `comint-input-filter-functions', and
1711 `comint-input-filter' are chosen according to the command interpreter running
1712 in the buffer. E.g.,
1714 If the interpreter is the csh,
1715 `comint-get-old-input' is the default:
1716 If `comint-use-prompt-regexp' is nil, then
1717 either return the current input field, if point is on an input
1718 field, or the current line, if point is on an output field.
1719 If `comint-use-prompt-regexp' is non-nil, then
1720 return the current line with any initial string matching the
1721 regexp `comint-prompt-regexp' removed.
1724 `comint-input-filter' is the default: returns t if the input isn't all white
1725 space.
1727 If the Comint is Lucid Common Lisp,
1728 `comint-get-old-input' snarfs the sexp ending at point.
1729 `comint-input-filter-functions' does nothing.
1730 `comint-input-filter' returns nil if the input matches input-filter-regexp,
1731 which matches (1) all whitespace (2) :a, :c, etc.
1733 Similarly for Soar, Scheme, etc."
1734 (interactive)
1735 ;; Note that the input string does not include its terminal newline.
1736 (let ((proc (get-buffer-process (current-buffer))))
1737 (if (not proc) (error "Current buffer has no process")
1738 (widen)
1739 (let* ((pmark (process-mark proc))
1740 (intxt (if (>= (point) (marker-position pmark))
1741 (progn (if comint-eol-on-send (end-of-line))
1742 (buffer-substring pmark (point)))
1743 (let ((copy (funcall comint-get-old-input)))
1744 (goto-char pmark)
1745 (insert copy)
1746 copy)))
1747 (input (if (not (eq comint-input-autoexpand 'input))
1748 ;; Just whatever's already there
1749 intxt
1750 ;; Expand and leave it visible in buffer
1751 (comint-replace-by-expanded-history t pmark)
1752 (buffer-substring pmark (point))))
1753 (history (if (not (eq comint-input-autoexpand 'history))
1754 input
1755 ;; This is messy 'cos ultimately the original
1756 ;; functions used do insertion, rather than return
1757 ;; strings. We have to expand, then insert back.
1758 (comint-replace-by-expanded-history t pmark)
1759 (let ((copy (buffer-substring pmark (point)))
1760 (start (point)))
1761 (insert input)
1762 (delete-region pmark start)
1763 copy))))
1765 (unless no-newline
1768 (comint-add-to-input-history history)
1770 (run-hook-with-args 'comint-input-filter-functions
1771 (if no-newline input
1774 (let ((beg (marker-position pmark))
1775 (end (if no-newline (point) (1- (point))))
1776 (inhibit-modification-hooks t))
1777 (when (> end beg)
1778 (add-text-properties beg end
1779 '(front-sticky t
1780 font-lock-face comint-highlight-input))
1781 (unless comint-use-prompt-regexp
1782 ;; Give old user input a field property of `input', to
1783 ;; distinguish it from both process output and unsent
1784 ;; input. The terminating newline is put into a special
1785 ;; `boundary' field to make cursor movement between input
1786 ;; and output fields smoother.
1787 (add-text-properties
1788 beg end
1789 '(mouse-face highlight
1790 help-echo "mouse-2: insert after prompt as new input"
1791 field input))))
1792 (unless (or no-newline comint-use-prompt-regexp)
1793 ;; Cover the terminating newline
1794 (add-text-properties end (1+ end)
1795 '(rear-nonsticky t
1796 field boundary
1797 inhibit-line-move-field-capture t))))
1799 (comint-snapshot-last-prompt)
1801 (setq comint-save-input-ring-index comint-input-ring-index)
1802 (setq comint-input-ring-index nil)
1803 ;; Update the markers before we send the input
1804 ;; in case we get output amidst sending the input.
1805 (set-marker comint-last-input-start pmark)
1806 (set-marker comint-last-input-end (point))
1807 (set-marker (process-mark proc) (point))
1808 ;; clear the "accumulation" marker
1809 (set-marker comint-accum-marker nil)
1810 (let ((comint-input-sender-no-newline no-newline))
1811 (funcall comint-input-sender proc input))
1813 ;; Optionally delete echoed input (after checking it).
1814 (when (and comint-process-echoes (not artificial))
1815 (let ((echo-len (- comint-last-input-end
1816 comint-last-input-start)))
1817 ;; Wait for all input to be echoed:
1818 (while (and (accept-process-output proc)
1819 (> (+ comint-last-input-end echo-len)
1820 (point-max))
1821 (zerop
1822 (compare-buffer-substrings
1823 nil comint-last-input-start
1824 (- (point-max) echo-len)
1825 ;; Above difference is equivalent to
1826 ;; (+ comint-last-input-start
1827 ;; (- (point-max) comint-last-input-end))
1828 nil comint-last-input-end (point-max)))))
1829 (if (and
1830 (<= (+ comint-last-input-end echo-len)
1831 (point-max))
1832 (zerop
1833 (compare-buffer-substrings
1834 nil comint-last-input-start comint-last-input-end
1835 nil comint-last-input-end
1836 (+ comint-last-input-end echo-len))))
1837 ;; Certain parts of the text to be deleted may have
1838 ;; been mistaken for prompts. We have to prevent
1839 ;; problems when `comint-prompt-read-only' is non-nil.
1840 (let ((inhibit-read-only t))
1841 (delete-region comint-last-input-end
1842 (+ comint-last-input-end echo-len))
1843 (when comint-prompt-read-only
1844 (save-excursion
1845 (goto-char comint-last-input-end)
1846 (comint-update-fence)))))))
1848 ;; This used to call comint-output-filter-functions,
1849 ;; but that scrolled the buffer in undesirable ways.
1850 (run-hook-with-args 'comint-output-filter-functions "")))))
1852 (defvar comint-preoutput-filter-functions nil
1853 "List of functions to call before inserting Comint output into the buffer.
1854 Each function gets one argument, a string containing the text received
1855 from the subprocess. It should return the string to insert, perhaps
1856 the same string that was received, or perhaps a modified or transformed
1857 string.
1859 The functions on the list are called sequentially, and each one is
1860 given the string returned by the previous one. The string returned by
1861 the last function is the text that is actually inserted in the
1862 redirection buffer.
1864 You can use `add-hook' to add functions to this list
1865 either globally or locally.")
1867 (defvar comint-inhibit-carriage-motion nil
1868 "If nil, Comint will interpret `carriage control' characters in output.
1869 See `comint-carriage-motion' for details.")
1871 ;; When non-nil, this is an overlay over the last recognized prompt in
1872 ;; the buffer; it is used when highlighting the prompt.
1873 (defvar comint-last-prompt-overlay nil)
1875 (defun comint-snapshot-last-prompt ()
1876 "`snapshot' any current `comint-last-prompt-overlay'.
1877 Freeze its attributes in place, even when more input comes along
1878 and moves the prompt overlay."
1879 (when comint-last-prompt-overlay
1880 (let ((inhibit-read-only t)
1881 (inhibit-modification-hooks t))
1882 (add-text-properties (overlay-start comint-last-prompt-overlay)
1883 (overlay-end comint-last-prompt-overlay)
1884 (overlay-properties comint-last-prompt-overlay)))))
1886 (defun comint-carriage-motion (start end)
1887 "Interpret carriage control characters in the region from START to END.
1888 Translate carriage return/linefeed sequences to linefeeds.
1889 Make single carriage returns delete to the beginning of the line.
1890 Make backspaces delete the previous character."
1891 (save-excursion
1893 ;; calling save-match-data and save-restriction. But, such a
1894 ;; check is not necessary now because we don't use regexp search
1895 ;; nor save-restriction. Note that the buffer is already widen,
1896 ;; and calling narrow-to-region and widen are not that heavy.
1897 (goto-char start)
1898 (let* ((inhibit-field-text-motion t)
1899 (inhibit-read-only t)
1900 (lbeg (line-beginning-position))
1901 delete-end ch)
1902 ;; If the preceding text is marked as "must-overwrite", record
1903 ;; it in delete-end.
1904 (when (and (> start (point-min))
1905 (get-text-property (1- start) 'comint-must-overwrite))
1906 (setq delete-end (point-marker))
1907 (remove-text-properties lbeg start '(comint-must-overwrite nil)))
1908 (narrow-to-region lbeg end)
1909 ;; Handle BS, LF, and CR specially.
1911 (setq ch (following-char))
1913 (delete-char 1)
1914 (if (> (point) lbeg)
1915 (delete-char -1)))
1917 (when delete-end ; CH = LF
1918 (if (< delete-end (point))
1919 (delete-region lbeg delete-end))
1920 (set-marker delete-end nil)
1921 (setq delete-end nil))
1922 (forward-char 1)
1923 (setq lbeg (point)))
1924 (t ; CH = CR
1925 (delete-char 1)
1926 (if delete-end
1927 (when (< delete-end (point))
1928 (delete-region lbeg delete-end)
1929 (move-marker delete-end (point)))
1930 (setq delete-end (point-marker))))))
1931 (when delete-end
1932 (if (< delete-end (point))
1933 ;; As there's a text after the last CR, make the current
1934 ;; line contain only that text.
1935 (delete-region lbeg delete-end)
1936 ;; Remember that the process output ends by CR, and thus we
1937 ;; must overwrite the contents of the current line next
1938 ;; time.
1939 (put-text-property lbeg delete-end 'comint-must-overwrite t))
1940 (set-marker delete-end nil))
1941 (widen))))
1943 ;; The purpose of using this filter for comint processes
1944 ;; is to keep comint-last-input-end from moving forward
1945 ;; when output is inserted.
1946 (defun comint-output-filter (process string)
1947 (let ((oprocbuf (process-buffer process)))
1948 ;; First check for killed buffer or no input.
1949 (when (and string oprocbuf (buffer-name oprocbuf))
1950 (with-current-buffer oprocbuf
1951 ;; Run preoutput filters
1952 (let ((functions comint-preoutput-filter-functions))
1953 (while (and functions string)
1954 (if (eq (car functions) t)
1955 (let ((functions
1956 (default-value 'comint-preoutput-filter-functions)))
1957 (while (and functions string)
1958 (setq string (funcall (car functions) string))
1959 (setq functions (cdr functions))))
1960 (setq string (funcall (car functions) string)))
1961 (setq functions (cdr functions))))
1963 ;; Insert STRING
1964 (let ((inhibit-read-only t)
1965 ;; The point should float after any insertion we do.
1966 (saved-point (copy-marker (point) t)))
1968 ;; We temporarly remove any buffer narrowing, in case the
1969 ;; process mark is outside of the restriction
1970 (save-restriction
1971 (widen)
1973 (goto-char (process-mark process))
1974 (set-marker comint-last-output-start (point))
1976 ;; insert-before-markers is a bad thing. XXX
1977 ;; Luckily we don't have to use it any more, we use
1978 ;; window-point-insertion-type instead.
1979 (insert string)
1981 ;; Advance process-mark
1982 (set-marker (process-mark process) (point))
1984 (unless comint-inhibit-carriage-motion
1985 ;; Interpret any carriage motion characters (newline, backspace)
1986 (comint-carriage-motion comint-last-output-start (point)))
1988 ;; Run these hooks with point where the user had it.
1989 (goto-char saved-point)
1990 (run-hook-with-args 'comint-output-filter-functions string)
1991 (set-marker saved-point (point))
1993 (goto-char (process-mark process)) ; in case a filter moved it
1995 (unless comint-use-prompt-regexp
1996 (let ((inhibit-read-only t)
1997 (inhibit-modification-hooks t))
1998 (add-text-properties comint-last-output-start (point)
1999 '(front-sticky
2000 (field inhibit-line-move-field-capture)
2001 rear-nonsticky t
2002 field output
2003 inhibit-line-move-field-capture t))))
2005 ;; Highlight the prompt, where we define `prompt' to mean
2006 ;; the most recent output that doesn't end with a newline.
2007 (let ((prompt-start (save-excursion (forward-line 0) (point)))
2008 (inhibit-read-only t)
2009 (inhibit-modification-hooks t))
2010 (when comint-prompt-read-only
2011 (or (= (point-min) prompt-start)
2012 (get-text-property (1- prompt-start) 'read-only)
2013 (put-text-property
2014 (1- prompt-start) prompt-start 'read-only 'fence))
2015 (add-text-properties
2016 prompt-start (point)
2017 '(read-only t rear-nonsticky t front-sticky (read-only))))
2018 (unless (and (bolp) (null comint-last-prompt-overlay))
2019 ;; Need to create or move the prompt overlay (in the case
2020 ;; where there is no prompt ((bolp) == t), we still do
2021 ;; this if there's already an existing overlay).
2022 (if comint-last-prompt-overlay
2023 ;; Just move an existing overlay
2024 (move-overlay comint-last-prompt-overlay
2025 prompt-start (point))
2026 ;; Need to create the overlay
2027 (setq comint-last-prompt-overlay
2028 (make-overlay prompt-start (point)))
2029 (overlay-put comint-last-prompt-overlay
2030 'font-lock-face 'comint-highlight-prompt))))
2032 (goto-char saved-point)))))))
2034 (defun comint-preinput-scroll-to-bottom ()
2035 "Go to the end of buffer in all windows showing it.
2036 Movement occurs if point in the selected window is not after the process mark,
2037 and `this-command' is an insertion command. Insertion commands recognized
2038 are `self-insert-command', `comint-magic-space', `yank', and `hilit-yank'.
2039 Depends on the value of `comint-scroll-to-bottom-on-input'.
2041 This function should be a pre-command hook."
2042 (if (and comint-scroll-to-bottom-on-input
2043 (memq this-command '(self-insert-command comint-magic-space yank
2044 hilit-yank)))
2045 (let* ((selected (selected-window))
2046 (current (current-buffer))
2047 (process (get-buffer-process current))
2048 (scroll comint-scroll-to-bottom-on-input))
2049 (if (and process (< (point) (process-mark process)))
2050 (if (eq scroll 'this)
2051 (goto-char (point-max))
2052 (walk-windows
2053 (lambda (window)
2054 (if (and (eq (window-buffer window) current)
2055 (or (eq scroll t) (eq scroll 'all)))
2056 (progn
2057 (select-window window)
2058 (goto-char (point-max))
2059 (select-window selected))))
2060 nil t))))))
2062 (defun comint-postoutput-scroll-to-bottom (string)
2063 "Go to the end of buffer in some or all windows showing it.
2064 Does not scroll if the current line is the last line in the buffer.
2065 Depends on the value of `comint-move-point-for-output' and
2066 `comint-scroll-show-maximum-output'.
2068 This function should be in the list `comint-output-filter-functions'."
2069 (let* ((selected (selected-window))
2070 (current (current-buffer))
2071 (process (get-buffer-process current))
2072 (scroll comint-move-point-for-output))
2073 (unwind-protect
2074 (if process
2075 (walk-windows
2076 (lambda (window)
2077 (when (eq (window-buffer window) current)
2078 (select-window window)
2079 (if (and (< (point) (process-mark process))
2080 (or (eq scroll t) (eq scroll 'all)
2081 ;; Maybe user wants point to jump to end.
2082 (and (eq scroll 'this) (eq selected window))
2083 (and (eq scroll 'others) (not (eq selected window)))
2084 ;; If point was at the end, keep it at end.
2085 (and (marker-position comint-last-output-start)
2086 (>= (point) comint-last-output-start))))
2087 (goto-char (process-mark process)))
2088 ;; Optionally scroll so that the text
2089 ;; ends at the bottom of the window.
2090 (if (and comint-scroll-show-maximum-output
2091 (= (point) (point-max)))
2092 (save-excursion
2093 (goto-char (point-max))
2094 (recenter (- -1 scroll-margin))))
2095 (select-window selected)))
2096 nil t))
2097 (set-buffer current))))
2099 (defun comint-truncate-buffer (&optional string)
2100 "Truncate the buffer to `comint-buffer-maximum-size'.
2101 This function could be on `comint-output-filter-functions' or bound to a key."
2102 (interactive)
2103 (save-excursion
2104 (goto-char (process-mark (get-buffer-process (current-buffer))))
2105 (forward-line (- comint-buffer-maximum-size))
2106 (beginning-of-line)
2107 (let ((inhibit-read-only t))
2108 (delete-region (point-min) (point)))))
2110 (defun comint-strip-ctrl-m (&optional string)
2111 "Strip trailing `^M' characters from the current output group.
2112 This function could be on `comint-output-filter-functions' or bound to a key."
2113 (interactive)
2114 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2115 (save-excursion
2116 (condition-case nil
2117 (goto-char
2118 (if (called-interactively-p 'interactive)
2119 comint-last-input-end comint-last-output-start))
2120 (error nil))
2122 (replace-match "" t t)))))
2123 (defalias 'shell-strip-ctrl-m 'comint-strip-ctrl-m)
2125 (defun comint-show-maximum-output ()
2126 "Put the end of the buffer at the bottom of the window."
2127 (interactive)
2128 (goto-char (point-max))
2129 (recenter (- -1 scroll-margin)))
2131 (defun comint-get-old-input-default ()
2132 "Default for `comint-get-old-input'.
2133 If `comint-use-prompt-regexp' is nil, then either
2134 return the current input field, if point is on an input field, or the
2135 current line, if point is on an output field.
2136 If `comint-use-prompt-regexp' is non-nil, then return
2137 the current line with any initial string matching the regexp
2138 `comint-prompt-regexp' removed."
2139 (let ((bof (field-beginning)))
2140 (if (eq (get-char-property bof 'field) 'input)
2141 (field-string-no-properties bof)
2142 (comint-bol)
2143 (buffer-substring-no-properties (point) (line-end-position)))))
2145 (defun comint-copy-old-input ()
2146 "Insert after prompt old input at point as new input to be edited.
2147 Calls `comint-get-old-input' to get old input."
2148 (interactive)
2149 (let ((input (funcall comint-get-old-input))
2150 (process (get-buffer-process (current-buffer))))
2151 (if (not process)
2152 (error "Current buffer has no process")
2153 (goto-char (process-mark process))
2154 (insert input))))
2156 (defun comint-skip-prompt ()
2157 "Skip past the text matching regexp `comint-prompt-regexp'.
2158 If this takes us past the end of the current line, don't skip at all."
2159 (if (and (looking-at comint-prompt-regexp)
2160 (<= (match-end 0) (line-end-position)))
2161 (goto-char (match-end 0))))
2163 (defun comint-after-pmark-p ()
2164 "Return t if point is after the process output marker."
2165 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2166 (<= (marker-position pmark) (point))))
2168 (defun comint-simple-send (proc string)
2169 "Default function for sending to PROC input STRING.
2170 This just sends STRING plus a newline. To override this,
2171 set the hook `comint-input-sender'."
2172 (let ((send-string
2173 (if comint-input-sender-no-newline
2174 string
2175 ;; Sending as two separate strings does not work
2178 (comint-send-string proc send-string))
2179 (if (and comint-input-sender-no-newline
2180 (not (string-equal string "")))
2181 (process-send-eof)))
2183 (defun comint-line-beginning-position ()
2184 "Return the buffer position of the beginning of the line, after any prompt.
2185 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done by
2186 skipping text matching the regular expression `comint-prompt-regexp',
2187 a buffer local variable."
2188 (if comint-use-prompt-regexp
2189 ;; Use comint-prompt-regexp
2190 (save-excursion
2191 (beginning-of-line)
2192 (comint-skip-prompt)
2193 (point))
2194 ;; Use input fields. Note that, unlike the behavior of
2195 ;; `line-beginning-position' inside a field, this function will
2196 ;; return the position of the end of a prompt, even if the point is
2197 ;; already inside the prompt. In order to do this, it assumes that
2198 ;; if there are two fields on a line, then the first one is the
2199 ;; prompt, and the second one is an input field, and is front-sticky
2200 ;; (as input fields should be).
2201 (constrain-to-field (line-beginning-position) (line-end-position))))
2203 (defun comint-bol (&optional arg)
2204 "Go to the beginning of line, then skip past the prompt, if any.
2206 If `comint-use-prompt-regexp' is non-nil, then the prompt skip is done
2207 by skipping text matching the regular expression `comint-prompt-regexp',
2208 a buffer local variable."
2209 (interactive "P")
2210 (if arg
2211 ;; Unlike `beginning-of-line', forward-line ignores field boundaries
2212 (forward-line 0)
2213 (goto-char (comint-line-beginning-position))))
2215 ;; For compatibility.
2216 (defun comint-read-noecho (prompt &optional ignore)
2217 (read-passwd prompt))
2219 ;; These three functions are for entering text you don't want echoed or
2220 ;; saved -- typically passwords to ftp, telnet, or somesuch.
2221 ;; Just enter m-x send-invisible and type in your line.
2223 (defun send-invisible (&optional prompt)
2224 "Read a string without echoing.
2225 Then send it to the process running in the current buffer.
2226 The string is sent using `comint-input-sender'.
2227 Security bug: your string can still be temporarily recovered with
2229 (interactive "P") ; Defeat snooping via C-x ESC ESC
2230 (let ((proc (get-buffer-process (current-buffer)))
2231 (prefix
2232 (if (eq (window-buffer (selected-window)) (current-buffer))
2233 ""
2234 (format "(In buffer %s) "
2235 (current-buffer)))))
2236 (if proc
2237 (let ((str (read-passwd (concat prefix
2238 (or prompt "Non-echoed text: ")))))
2239 (if (stringp str)
2240 (progn
2241 (comint-snapshot-last-prompt)
2242 (funcall comint-input-sender proc str))
2243 (message "Warning: text will be echoed")))
2244 (error "Buffer %s has no process" (current-buffer)))))
2246 (defun comint-watch-for-password-prompt (string)
2247 "Prompt in the minibuffer for password and send without echoing.
2248 This function uses `send-invisible' to read and send a password to the buffer's
2249 process if STRING contains a password prompt defined by
2250 `comint-password-prompt-regexp'.
2252 This function could be in the list `comint-output-filter-functions'."
2253 (when (string-match comint-password-prompt-regexp string)
2255 (setq string (replace-match "" t t string)))
2256 (send-invisible string)))
2257 \f
2258 ;; Low-level process communication
2260 (defun comint-send-string (process string)
2261 "Like `process-send-string', but also does extra bookkeeping for Comint mode."
2262 (if process
2263 (with-current-buffer (if (processp process)
2264 (process-buffer process)
2265 (get-buffer process))
2266 (comint-snapshot-last-prompt))
2267 (comint-snapshot-last-prompt))
2268 (process-send-string process string))
2270 (defun comint-send-region (process start end)
2271 "Like `process-send-region', but also does extra bookkeeping for Comint mode."
2272 (if process
2273 (with-current-buffer (if (processp process)
2274 (process-buffer process)
2275 (get-buffer process))
2276 (comint-snapshot-last-prompt))
2277 (comint-snapshot-last-prompt))
2278 (process-send-region process start end))
2280 \f
2281 ;; Random input hackage
2283 (defun comint-delete-output ()
2284 "Delete all output from interpreter since last input.
2285 Does not delete the prompt."
2286 (interactive)
2287 (let ((proc (get-buffer-process (current-buffer)))
2288 (replacement nil)
2289 (inhibit-read-only t))
2290 (save-excursion
2291 (let ((pmark (progn (goto-char (process-mark proc))
2292 (forward-line 0)
2293 (point-marker))))
2294 (delete-region comint-last-input-end pmark)
2295 (goto-char (process-mark proc))
2297 (buffer-substring pmark (point))))
2298 (delete-region pmark (point))))
2299 ;; Output message and put back prompt
2300 (comint-output-filter proc replacement)))
2301 (define-obsolete-function-alias 'comint-kill-output
2302 'comint-delete-output "21.1")
2304 (defun comint-write-output (filename &optional append mustbenew)
2305 "Write output from interpreter since last input to FILENAME.
2306 Any prompt at the end of the output is not written.
2308 If the optional argument APPEND (the prefix argument when interactive)
2309 is non-nil, the output is appended to the file instead.
2311 If the optional argument MUSTBENEW is non-nil, check for an existing
2312 file with the same name. If MUSTBENEW is `excl', that means to get an
2313 error if the file already exists; never overwrite. If MUSTBENEW is
2314 neither nil nor `excl', that means ask for confirmation before
2315 overwriting, but do go ahead and overwrite the file if the user
2316 confirms. When interactive, MUSTBENEW is nil when appending, and t
2317 otherwise."
2318 (interactive
2319 (list (read-file-name
2320 (if current-prefix-arg
2321 "Append output to file: "
2322 "Write output to file: "))
2323 current-prefix-arg
2324 (not current-prefix-arg)))
2325 (save-excursion
2326 (goto-char (process-mark (get-buffer-process (current-buffer))))
2327 (forward-line 0)
2328 (write-region comint-last-input-end (point) filename
2329 append nil nil mustbenew)))
2331 ;; This function exists for the benefit of the menu; from the keyboard,
2332 ;; users can just use `comint-write-output' with a prefix arg.
2333 (defun comint-append-output-to-file (filename)
2334 "Append output from interpreter since last input to FILENAME.
2335 Any prompt at the end of the output is not written."
2336 (interactive "fAppend output to file: ")
2337 (comint-write-output filename t))
2339 (defun comint-show-output ()
2340 "Display start of this batch of interpreter output at top of window.
2341 Sets mark to the value of point when this command is run."
2342 (interactive)
2343 (push-mark)
2344 (let ((pos (or (marker-position comint-last-input-end) (point-max))))
2345 (cond (comint-use-prompt-regexp
2346 (goto-char pos)
2347 (beginning-of-line 0)
2348 (set-window-start (selected-window) (point))
2349 (comint-skip-prompt))
2350 (t
2351 (goto-char (field-beginning pos))
2352 (set-window-start (selected-window) (point))))))
2355 (defun comint-interrupt-subjob ()
2356 "Interrupt the current subjob.
2357 This command also kills the pending input
2358 between the process mark and point."
2359 (interactive)
2360 (comint-skip-input)
2361 (interrupt-process nil comint-ptyp)
2363 )
2365 (defun comint-kill-subjob ()
2366 "Send kill 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 (kill-process nil comint-ptyp))
2373 (defun comint-quit-subjob ()
2374 "Send quit signal to the current subjob.
2375 This command also kills the pending input
2376 between the process mark and point."
2377 (interactive)
2378 (comint-skip-input)
2379 (quit-process nil comint-ptyp))
2381 (defun comint-stop-subjob ()
2382 "Stop the current subjob.
2383 This command also kills the pending input
2384 between the process mark and point.
2386 WARNING: if there is no current subjob, you can end up suspending
2387 the top-level process running in the buffer. If you accidentally do
2389 is not a problem with most shells, since they ignore this signal.)"
2390 (interactive)
2391 (comint-skip-input)
2392 (stop-process nil comint-ptyp))
2394 (defun comint-continue-subjob ()
2395 "Send CONT signal to process buffer's process group.
2396 Useful if you accidentally suspend the top-level process."
2397 (interactive)
2398 (continue-process nil comint-ptyp))
2400 (defun comint-skip-input ()
2401 "Skip all pending input, from last stuff output by interpreter to point.
2402 This means mark it as if it had been sent as input, without sending it."
2403 (let ((comint-input-sender 'ignore)
2404 (comint-input-filter-functions nil))
2405 (comint-send-input t t))
2406 (end-of-line)
2407 (let ((pos (point))
2408 (marker (process-mark (get-buffer-process (current-buffer)))))
2409 (insert " " (key-description (this-command-keys)))
2410 (if (= marker pos)
2411 (set-marker marker (point)))))
2413 (defun comint-kill-input ()
2414 "Kill all text from last stuff output by interpreter to point."
2415 (interactive)
2416 (let ((pmark (process-mark (get-buffer-process (current-buffer)))))
2417 (if (> (point) (marker-position pmark))
2418 (kill-region pmark (point)))))
2420 (defun comint-delchar-or-maybe-eof (arg)
2421 "Delete ARG characters forward or send an EOF to subprocess.
2422 Sends an EOF only if point is at the end of the buffer and there is no input."
2423 (interactive "p")
2424 (let ((proc (get-buffer-process (current-buffer))))
2425 (if (and (eobp) proc (= (point) (marker-position (process-mark proc))))
2426 (comint-send-eof)
2427 (delete-char arg))))
2429 (defun comint-send-eof ()
2430 "Send an EOF to the current buffer's process."
2431 (interactive)
2432 (comint-send-input t t)
2433 (process-send-eof))
2436 (defun comint-backward-matching-input (regexp n)
2437 "Search backward through buffer for input fields that match REGEXP.
2438 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2439 by lines that match `comint-prompt-regexp'.
2441 With prefix argument N, search for Nth previous match.
2442 If N is negative, find the next or Nth next match."
2443 (interactive (comint-regexp-arg "Backward input matching (regexp): "))
2444 (if comint-use-prompt-regexp
2445 ;; Use comint-prompt-regexp
2446 (let* ((re (concat comint-prompt-regexp ".*" regexp))
2447 (pos (save-excursion (end-of-line (if (> n 0) 0 1))
2448 (if (re-search-backward re nil t n)
2449 (point)))))
2450 (if (null pos)
2451 (progn (message "Not found")
2452 (ding))
2453 (goto-char pos)
2454 (comint-bol nil)))
2455 ;; Use input fields
2456 (let* ((dir (if (< n 0) -1 1))
2457 (pos
2458 (save-excursion
2459 (while (/= n 0)
2460 (unless (re-search-backward regexp nil t dir)
2461 (error "Not found"))
2462 (when (eq (get-char-property (point) 'field) 'input)
2463 (setq n (- n dir))))
2464 (field-beginning))))
2465 (goto-char pos))))
2468 (defun comint-forward-matching-input (regexp n)
2469 "Search forward through buffer for input fields that match REGEXP.
2470 If `comint-use-prompt-regexp' is non-nil, then input fields are identified
2471 by lines that match `comint-prompt-regexp'.
2473 With prefix argument N, search for Nth following match.
2474 If N is negative, find the previous or Nth previous match."
2475 (interactive (comint-regexp-arg "Forward input matching (regexp): "))
2476 (comint-backward-matching-input regexp (- n)))
2479 (defun comint-next-prompt (n)
2480 "Move to end of Nth next prompt in the buffer.
2481 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2482 the Nth next `input' field, otherwise, it means the Nth occurrence of
2483 text matching `comint-prompt-regexp'."
2484 (interactive "p")
2485 (if comint-use-prompt-regexp
2486 ;; Use comint-prompt-regexp
2487 (let ((paragraph-start comint-prompt-regexp))
2488 (end-of-line (if (> n 0) 1 0))
2489 (forward-paragraph n)
2490 (comint-skip-prompt))
2491 ;; Use input fields
2492 (let ((pos (point))
2493 (input-pos nil)
2494 prev-pos)
2495 (while (/= n 0)
2496 (setq prev-pos pos)
2497 (setq pos
2498 (if (> n 0)
2499 (next-single-char-property-change pos 'field)
2500 (previous-single-char-property-change pos 'field)))
2501 (cond ((or (null pos) (= pos prev-pos))
2502 ;; Ran off the end of the buffer.
2503 (when (> n 0)
2504 ;; There's always an input field at the end of the
2505 ;; buffer, but it has a `field' property of nil.
2506 (setq input-pos (point-max)))
2507 ;; stop iterating
2508 (setq n 0))
2509 ((eq (get-char-property pos 'field) 'input)
2510 (setq n (if (< n 0) (1+ n) (1- n)))
2511 (setq input-pos pos))))
2512 (when input-pos
2513 (goto-char input-pos)))))
2516 (defun comint-previous-prompt (n)
2517 "Move to end of Nth previous prompt in the buffer.
2518 If `comint-use-prompt-regexp' is nil, then this means the beginning of
2519 the Nth previous `input' field, otherwise, it means the Nth occurrence of
2520 text matching `comint-prompt-regexp'."
2521 (interactive "p")
2522 (comint-next-prompt (- n)))
2524 ;; State used by `comint-insert-previous-argument' when cycling.
2525 (defvar comint-insert-previous-argument-last-start-pos nil)
2526 (make-variable-buffer-local 'comint-insert-previous-argument-last-start-pos)
2527 (defvar comint-insert-previous-argument-last-index nil)
2528 (make-variable-buffer-local 'comint-insert-previous-argument-last-index)
2530 ;; Needs fixing:
2531 ;; make comint-arguments understand negative indices as bash does
2532 (defun comint-insert-previous-argument (index)
2533 "Insert the INDEXth argument from the previous Comint command-line at point.
2534 Spaces are added at beginning and/or end of the inserted string if
2535 necessary to ensure that it's separated from adjacent arguments.
2536 Interactively, if no prefix argument is given, the last argument is inserted.
2537 Repeated interactive invocations will cycle through the same argument
2538 from progressively earlier commands (using the value of INDEX specified
2539 with the first command).
2540 This command is like `M-.' in bash."
2541 (interactive "P")
2542 (unless (null index)
2543 (setq index (prefix-numeric-value index)))
2544 (cond ((eq last-command this-command)
2545 ;; Delete last input inserted by this command.
2546 (delete-region comint-insert-previous-argument-last-start-pos (point))
2547 (setq index comint-insert-previous-argument-last-index))
2548 (t
2549 ;; This is a non-repeat invocation, so initialize state.
2550 (setq comint-input-ring-index nil)
2551 (setq comint-insert-previous-argument-last-index index)
2552 (when (null comint-insert-previous-argument-last-start-pos)
2553 ;; First usage; initialize to a marker
2554 (setq comint-insert-previous-argument-last-start-pos
2555 (make-marker)))))
2556 ;; Make sure we're not in the prompt, and add a beginning space if necess.
2557 (if (<= (point) (comint-line-beginning-position))
2558 (comint-bol)
2559 (just-one-space))
2560 ;; Remember the beginning of what we insert, so we can delete it if
2561 ;; the command is repeated.
2562 (set-marker comint-insert-previous-argument-last-start-pos (point))
2563 ;; Insert the argument.
2564 (let ((input-string (comint-previous-input-string 0)))
2566 ;; strip terminating '&'
2567 (setq input-string (substring input-string 0 (match-beginning 0))))
2568 (insert (comint-arguments input-string index index)))
2569 ;; Make next invocation return arg from previous input
2570 (setq comint-input-ring-index (1+ (or comint-input-ring-index 0)))
2571 ;; Add a terminating space if necessary.
2572 (unless (eolp)
2573 (just-one-space)))
2575 \f
2576 ;; Support editing with `comint-prompt-read-only' set to t.
2578 (defun comint-update-fence ()
2579 "Update read-only status of newline before point.
2580 The `fence' read-only property is used to indicate that a newline
2582 following front-sticky read-only region. This is used to
2583 implement comint read-only prompts. If the text after a newline
2584 changes, the read-only status of that newline may need updating.
2585 That is what this function does.
2587 This function does nothing if point is not at the beginning of a
2588 line, or is at the beginning of the accessible portion of the buffer.
2589 Otherwise, if the character after point has a front-sticky
2590 read-only property, then the preceding newline is given a
2591 read-only property of `fence', unless it already is read-only.
2592 If the character after point does not have a front-sticky
2593 read-only property, any read-only property of `fence' on the
2594 preceding newline is removed."
2595 (let* ((pt (point)) (lst (get-text-property pt 'front-sticky))
2596 (inhibit-modification-hooks t))
2597 (and (bolp)
2598 (not (bobp))
2599 (if (and (get-text-property pt 'read-only)
2600 (if (listp lst) (memq 'read-only lst) t))
2601 (unless (get-text-property (1- pt) 'read-only)
2602 (put-text-property (1- pt) pt 'read-only 'fence))
2603 (when (eq (get-text-property (1- pt) 'read-only) 'fence)
2604 (remove-list-of-text-properties (1- pt) pt '(read-only)))))))
2606 (defun comint-kill-whole-line (&optional count)
2607 "Kill current line, ignoring read-only and field properties.
2608 With prefix arg COUNT, kill that many lines starting from the current line.
2609 If COUNT is negative, kill backward. Also kill the preceding newline,
2611 with negative arguments.)
2612 If COUNT is zero, kill current line but exclude the trailing newline.
2613 The read-only status of newlines is updated with `comint-update-fence',
2614 if necessary."
2615 (interactive "p")
2616 (let ((inhibit-read-only t) (inhibit-field-text-motion t))
2617 (kill-whole-line count)
2618 (when (>= count 0) (comint-update-fence))))
2620 (defun comint-kill-region (beg end &optional yank-handler)
2621 "Like `kill-region', but ignores read-only properties, if safe.
2622 This command assumes that the buffer contains read-only
2624 properties at the beginning of a line, with the preceding newline
2625 being read-only to protect the prompt. This is true of the
2626 comint prompts if `comint-prompt-read-only' is non-nil. This
2627 command will not delete the region if this would create mutilated
2628 or out of place prompts. That is, if any part of a prompt is
2629 deleted, the entire prompt must be deleted and all remaining
2630 prompts should stay at the beginning of a line. If this is not
2631 the case, this command just calls `kill-region' with all
2632 read-only properties intact. The read-only status of newlines is
2633 updated using `comint-update-fence', if necessary."
2634 (interactive "r")
2635 (save-excursion
2636 (let* ((true-beg (min beg end))
2637 (true-end (max beg end))
2638 (beg-bolp (progn (goto-char true-beg) (bolp)))
2639 (beg-lst (get-text-property true-beg 'front-sticky))
2640 (beg-bad (and (get-text-property true-beg 'read-only)
2641 (if (listp beg-lst) (memq 'read-only beg-lst) t)))
2642 (end-bolp (progn (goto-char true-end) (bolp)))
2643 (end-lst (get-text-property true-end 'front-sticky))
2644 (end-bad (and (get-text-property true-end 'read-only)
2645 (if (listp end-lst) (memq 'read-only end-lst) t))))
2646 (if (or (and (not beg-bolp) (or beg-bad end-bad))
2647 (and (not end-bolp) end-bad))
2648 (kill-region beg end yank-handler)
2649 (let ((inhibit-read-only t))
2650 (kill-region beg end yank-handler)
2651 (comint-update-fence))))))
2653 \f
2654 ;; Support for source-file processing commands.
2655 ;;============================================================================
2656 ;; Many command-interpreters (e.g., Lisp, Scheme, Soar) have
2657 ;; commands that process files of source text (e.g. loading or compiling
2658 ;; files). So the corresponding process-in-a-buffer modes have commands
2659 ;; for doing this (e.g., lisp-load-file). The functions below are useful
2660 ;; for defining these commands.
2661 ;;
2662 ;; Alas, these guys don't do exactly the right thing for Lisp, Scheme
2663 ;; and Soar, in that they don't know anything about file extensions.
2664 ;; So the compile/load interface gets the wrong default occasionally.
2665 ;; The load-file/compile-file default mechanism could be smarter -- it
2666 ;; doesn't know about the relationship between filename extensions and
2667 ;; whether the file is source or executable. If you compile foo.lisp
2668 ;; with compile-file, then the next load-file should use foo.bin for
2669 ;; the default, not foo.lisp. This is tricky to do right, particularly
2670 ;; because the extension for executable files varies so much (.o, .bin,
2671 ;; .lbin, .mo, .vo, .ao, ...).
2674 ;; COMINT-SOURCE-DEFAULT -- determines defaults for source-file processing
2675 ;; commands.
2676 ;;
2677 ;; COMINT-CHECK-SOURCE -- if FNAME is in a modified buffer, asks you if you
2678 ;; want to save the buffer before issuing any process requests to the command
2679 ;; interpreter.
2680 ;;
2681 ;; COMINT-GET-SOURCE -- used by the source-file processing commands to prompt
2682 ;; for the file to process.
2684 (defun comint-source-default (previous-dir/file source-modes)
2685 "Compute the defaults for `load-file' and `compile-file' commands.
2687 PREVIOUS-DIR/FILE is a pair (DIRECTORY . FILENAME) from the last
2688 source-file processing command, or nil if there hasn't been one yet.
2689 SOURCE-MODES is a list used to determine what buffers contain source
2690 files: if the major mode of the buffer is in SOURCE-MODES, it's source.
2691 Typically, (lisp-mode) or (scheme-mode).
2693 If the command is given while the cursor is inside a string, *and*
2694 the string is an existing filename, *and* the filename is not a directory,
2695 then the string is taken as default. This allows you to just position
2696 your cursor over a string that's a filename and have it taken as default.
2698 If the command is given in a file buffer whose major mode is in
2699 SOURCE-MODES, then the filename is the default file, and the
2700 file's directory is the default directory.
2702 If the buffer isn't a source file buffer (e.g., it's the process buffer),
2703 then the default directory & file are what was used in the last source-file
2704 processing command (i.e., PREVIOUS-DIR/FILE). If this is the first time
2705 the command has been run (PREVIOUS-DIR/FILE is nil), the default directory
2708 SOURCE-MODES is typically going to be something like (tea-mode)
2709 for T programs, (lisp-mode) for Lisp programs, (soar-mode lisp-mode)
2710 for Soar programs, etc.
2712 The function returns a pair: (default-directory . default-file)."
2713 (cond ((and buffer-file-name (memq major-mode source-modes))
2714 (cons (file-name-directory buffer-file-name)
2715 (file-name-nondirectory buffer-file-name)))
2716 (previous-dir/file)
2717 (t
2718 (cons default-directory nil))))
2721 (defun comint-check-source (fname)
2722 "Check whether to save buffers visiting file FNAME.
2723 Prior to loading or compiling (or otherwise processing) a file (in the CMU
2724 process-in-a-buffer modes), this function can be called on the filename.
2725 If the file is loaded into a buffer, and the buffer is modified, the user
2726 is queried to see if he wants to save the buffer before proceeding with
2727 the load or compile."
2728 (let ((buff (get-file-buffer fname)))
2729 (if (and buff
2730 (buffer-modified-p buff)
2731 (y-or-n-p (format "Save buffer %s first? " (buffer-name buff))))
2732 ;; save BUFF.
2733 (let ((old-buffer (current-buffer)))
2734 (set-buffer buff)
2735 (save-buffer)
2736 (set-buffer old-buffer)))))
2738 (defun comint-extract-string ()
2739 "Return string around point, or nil."
2740 (let ((syntax (syntax-ppss)))
2741 (when (nth 3 syntax)
2742 (condition-case ()
2743 (buffer-substring-no-properties (1+ (nth 8 syntax))
2744 (progn (goto-char (nth 8 syntax))
2745 (forward-sexp)
2746 (1- (point))))
2747 (error nil)))))
2749 (defun comint-get-source (prompt prev-dir/file source-modes mustmatch-p)
2750 "Prompt for filenames in commands that process source files,
2751 e.g. loading or compiling a file.
2752 Provides a default, if there is one, and returns the result filename.
2754 See `comint-source-default' for more on determining defaults.
2756 PROMPT is the prompt string. PREV-DIR/FILE is the (DIRECTORY . FILE) pair
2757 from the last source processing command. SOURCE-MODES is a list of major
2758 modes used to determine what file buffers contain source files. (These
2759 two arguments are used for determining defaults.) If MUSTMATCH-P is true,
2760 then the filename reader will only accept a file that exists.
2762 A typical use:
2764 '(lisp-mode) t))"
2765 (let* ((def (comint-source-default prev-dir/file source-modes))
2766 (stringfile (comint-extract-string))
2767 (sfile-p (and stringfile
2768 (condition-case ()
2769 (file-exists-p stringfile)
2770 (error nil))
2771 (not (file-directory-p stringfile))))
2772 (defdir (if sfile-p (file-name-directory stringfile)
2773 (car def)))
2774 (deffile (if sfile-p (file-name-nondirectory stringfile)
2775 (cdr def)))
2776 (ans (read-file-name (if deffile (format "%s(default %s) "
2777 prompt deffile)
2778 prompt)
2779 defdir
2780 (concat defdir deffile)
2781 mustmatch-p)))
2782 (list (expand-file-name (substitute-in-file-name ans)))))
2784 ;; I am somewhat divided on this string-default feature. It seems
2785 ;; to violate the principle-of-least-astonishment, in that it makes
2786 ;; the default harder to predict, so you actually have to look and see
2787 ;; what the default really is before choosing it. This can trip you up.
2788 ;; On the other hand, it can be useful, I guess. I would appreciate feedback
2789 ;; on this.
2790 ;; -Olin
2792 \f
2793 ;; Simple process query facility.
2794 ;; ===========================================================================
2795 ;; This function is for commands that want to send a query to the process
2796 ;; and show the response to the user. For example, a command to get the
2797 ;; arglist for a Common Lisp function might send a "(arglist 'foo)" query
2798 ;; to an inferior Common Lisp process.
2799 ;;
2800 ;; This simple facility just sends strings to the inferior process and pops
2801 ;; up a window for the process buffer so you can see what the process
2802 ;; responds with. We don't do anything fancy like try to intercept what the
2803 ;; process responds with and put it in a pop-up window or on the message
2804 ;; line. We just display the buffer. Low tech. Simple. Works good.
2806 (defun comint-proc-query (proc str)
2807 "Send to the inferior process PROC the string STR.
2808 Pop-up but do not select a window for the inferior process so that
2809 its response can be seen."
2810 (let* ((proc-buf (process-buffer proc))
2811 (proc-mark (process-mark proc)))
2812 (display-buffer proc-buf)
2813 (set-buffer proc-buf) ; but it's not the selected *window*
2814 (let ((proc-win (get-buffer-window proc-buf 0))
2815 (proc-pt (marker-position proc-mark)))
2816 (comint-send-string proc str) ; send the query
2817 (accept-process-output proc) ; wait for some output
2818 ;; Try to position the proc window so you can see the answer.
2819 ;; This is bogus code. If you delete the (sit-for 0), it breaks.
2820 ;; I don't know why. Wizards invited to improve it.
2821 (unless (pos-visible-in-window-p proc-pt proc-win)
2822 (let ((opoint (window-point proc-win)))
2823 (set-window-point proc-win proc-mark)
2824 (sit-for 0)
2825 (if (not (pos-visible-in-window-p opoint proc-win))
2826 (push-mark opoint)
2827 (set-window-point proc-win opoint)))))))
2829 \f
2830 ;; Filename/command/history completion in a buffer
2831 ;; ===========================================================================
2832 ;; Useful completion functions, courtesy of the Ergo group.
2834 ;; Six commands:
2835 ;; comint-dynamic-complete Complete or expand command, filename,
2836 ;; history at point.
2837 ;; comint-dynamic-complete-filename Complete filename at point.
2838 ;; comint-dynamic-list-filename-completions List completions in help buffer.
2839 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
2840 ;; replace with expanded/completed name.
2841 ;; comint-dynamic-simple-complete Complete stub given candidates.
2843 ;; These are not installed in the comint-mode keymap. But they are
2844 ;; available for people who want them. Shell-mode installs them:
2846 ;; (define-key shell-mode-map "\M-?"
2847 ;; 'comint-dynamic-list-filename-completions)))
2848 ;;
2849 ;; Commands like this are fine things to put in load hooks if you
2850 ;; want them present in specific modes.
2852 (defcustom comint-completion-autolist nil
2853 "If non-nil, automatically list possibilities on partial completion.
2854 This mirrors the optional behavior of tcsh."
2855 :type 'boolean
2856 :group 'comint-completion)
2858 (defcustom comint-completion-addsuffix t
2859 "If non-nil, add a `/' to completed directories, ` ' to file names.
2860 If a cons pair, it should be of the form (DIRSUFFIX . FILESUFFIX) where
2861 DIRSUFFIX and FILESUFFIX are strings added on unambiguous or exact completion.
2862 This mirrors the optional behavior of tcsh."
2863 :type '(choice (const :tag "None" nil)
2864 (const :tag "Add /" t)
2865 (cons :tag "Suffix pair"
2866 (string :tag "Directory suffix")
2867 (string :tag "File suffix")))
2868 :group 'comint-completion)
2870 (defcustom comint-completion-recexact nil
2871 "If non-nil, use shortest completion if characters cannot be added.
2872 This mirrors the optional behavior of tcsh.
2874 A non-nil value is useful if `comint-completion-autolist' is non-nil too."
2875 :type 'boolean
2876 :group 'comint-completion)
2878 (defcustom comint-completion-fignore nil
2879 "List of suffixes to be disregarded during file completion.
2880 This mirrors the optional behavior of bash and tcsh.
2882 Note that this applies to `comint-dynamic-complete-filename' only."
2883 :type '(repeat (string :tag "Suffix"))
2884 :group 'comint-completion)
2886 ;;;###autoload
2887 (defvar comint-file-name-prefix (purecopy "")
2888 "Prefix prepended to absolute file names taken from process input.
2889 This is used by Comint's and shell's completion functions, and by shell's
2890 directory tracking functions.")
2892 (defvar comint-file-name-chars
2893 (if (memq system-type '(ms-dos windows-nt cygwin))
2894 "~/A-Za-z0-9_^$!#%&{}@`'.,:()-"
2895 "[]~/A-Za-z0-9+@:_.$#%,={}-")
2896 "String of characters valid in a file name.
2897 Note that all non-ASCII characters are considered valid in a file name
2898 regardless of what this variable says.
2900 This is a good thing to set in mode hooks.")
2902 (defvar comint-file-name-quote-list nil
2905 This is a good thing to set in mode hooks.")
2908 (defun comint-directory (directory)
2909 "Return expanded DIRECTORY, with `comint-file-name-prefix' if absolute."
2910 (expand-file-name (if (file-name-absolute-p directory)
2911 (concat comint-file-name-prefix directory)
2912 directory)))
2915 (defun comint-word (word-chars)
2916 "Return the word of WORD-CHARS at point, or nil if none is found.
2917 Word constituents are considered to be those in WORD-CHARS, which is like the
2919 (save-excursion
2920 (let ((here (point))
2921 giveup)
2922 (while (not giveup)
2923 (let ((startpoint (point)))
2925 ;; Fixme: This isn't consistent with Bash, at least -- not
2926 ;; all non-ASCII chars should be word constituents.
2927 (if (and (> (- (point) 2) (point-min))
2929 (forward-char -2))
2930 (if (and (> (- (point) 1) (point-min))
2931 (>= (char-after (- (point) 1)) 128))
2932 (forward-char -1))
2933 (if (= (point) startpoint)
2934 (setq giveup t))))
2935 ;; Set match-data to match the entire string.
2936 (when (< (point) here)
2937 (set-match-data (list (point) here))
2938 (match-string 0)))))
2940 (defun comint-substitute-in-file-name (filename)
2941 "Return FILENAME with environment variables substituted.
2942 Supports additional environment variable syntax of the command
2943 interpreter (e.g., the percent notation of cmd.exe on NT)."
2944 (let ((name (substitute-in-file-name filename)))
2945 (if (memq system-type '(ms-dos windows-nt))
2946 (let (env-var-name
2947 env-var-val)
2948 (save-match-data
2950 (setq env-var-name (match-string 1 name))
2951 (setq env-var-val (or (getenv env-var-name) ""))
2952 (setq name (replace-match env-var-val t t name))))))
2953 name))
2955 (defun comint-match-partial-filename ()
2956 "Return the filename at point, or nil if none is found.
2957 Environment variables are substituted. See `comint-word'."
2958 (let ((filename (comint-word comint-file-name-chars)))
2959 (and filename (comint-substitute-in-file-name
2960 (comint-unquote-filename filename)))))
2963 (defun comint-quote-filename (filename)
2964 "Return FILENAME with magic characters quoted.
2965 Magic characters are those in `comint-file-name-quote-list'."
2966 (if (null comint-file-name-quote-list)
2967 filename
2968 (let ((regexp
2969 (format "[%s]"
2970 (mapconcat 'char-to-string comint-file-name-quote-list ""))))
2971 (save-match-data
2972 (let ((i 0))
2973 (while (string-match regexp filename i)
2975 (setq i (1+ (match-end 0)))))
2976 filename))))
2978 (defun comint-unquote-filename (filename)
2979 "Return FILENAME with quoted characters unquoted."
2980 (if (null comint-file-name-quote-list)
2981 filename
2982 (save-match-data
2983 (let ((i 0))
2986 (setq i (+ 1 (match-beginning 0)))))
2987 filename)))
2990 (defun comint-dynamic-complete ()
2991 "Dynamically perform completion at point.
2992 Calls the functions in `comint-dynamic-complete-functions' to perform
2993 completion until a function returns non-nil, at which point completion is
2994 assumed to have occurred."
2995 (interactive)
2996 (run-hook-with-args-until-success 'comint-dynamic-complete-functions))
2999 (defun comint-dynamic-complete-filename ()
3000 "Dynamically complete the filename at point.
3001 Completes if after a filename. See `comint-match-partial-filename' and
3002 `comint-dynamic-complete-as-filename'.
3003 This function is similar to `comint-replace-by-expanded-filename', except that
3004 it won't change parts of the filename already entered in the buffer; it just
3005 adds completion characters to the end of the filename. A completions listing
3006 may be shown in a help buffer if completion is ambiguous.
3008 Completion is dependent on the value of `comint-completion-addsuffix',
3009 `comint-completion-recexact' and `comint-completion-fignore', and the timing of
3010 completions listing is dependent on the value of `comint-completion-autolist'.
3012 Returns t if successful."
3013 (interactive)
3014 (when (comint-match-partial-filename)
3015 (unless (window-minibuffer-p (selected-window))
3016 (message "Completing file name..."))
3017 (comint-dynamic-complete-as-filename)))
3019 (defun comint-dynamic-complete-as-filename ()
3020 "Dynamically complete at point as a filename.
3021 See `comint-dynamic-complete-filename'. Returns t if successful."
3022 (let* ((completion-ignore-case read-file-name-completion-ignore-case)
3023 (completion-ignored-extensions comint-completion-fignore)
3024 ;; If we bind this, it breaks remote directory tracking in rlogin.el.
3025 ;; I think it was originally bound to solve file completion problems,
3026 ;; but subsequent changes may have made this unnecessary. sm.
3027 ;;(file-name-handler-alist nil)
3028 (minibuffer-p (window-minibuffer-p (selected-window)))
3029 (success t)
3030 (dirsuffix (cond ((not comint-completion-addsuffix)
3031 "")
3032 ((not (consp comint-completion-addsuffix))
3033 "/")
3034 (t
3035 (car comint-completion-addsuffix))))
3036 (filesuffix (cond ((not comint-completion-addsuffix)
3037 "")
3038 ((not (consp comint-completion-addsuffix))
3039 " ")
3040 (t
3041 (cdr comint-completion-addsuffix))))
3042 (filename (comint-match-partial-filename))
3043 (filename-beg (if filename (match-beginning 0) (point)))
3044 (filename-end (if filename (match-end 0) (point)))
3045 (filename (or filename ""))
3046 (filedir (file-name-directory filename))
3047 (filenondir (file-name-nondirectory filename))
3048 (directory (if filedir (comint-directory filedir) default-directory))
3049 (completion (file-name-completion filenondir directory)))
3050 (cond ((null completion)
3051 (if minibuffer-p
3052 (minibuffer-message "No completions of %s" filename)
3053 (message "No completions of %s" filename))
3054 (setq success nil))
3055 ((eq completion t) ; Means already completed "file".
3056 (insert filesuffix)
3057 (unless minibuffer-p
3058 (message "Sole completion")))
3059 ((string-equal completion "") ; Means completion on "directory/".
3060 (comint-dynamic-list-filename-completions))
3061 (t ; Completion string returned.
3062 (let ((file (concat (file-name-as-directory directory) completion)))
3063 ;; Insert completion. Note that the completion string
3064 ;; may have a different case than what's in the prompt,
3065 ;; if read-file-name-completion-ignore-case is non-nil,
3066 (delete-region filename-beg filename-end)
3067 (if filedir (insert (comint-quote-filename filedir)))
3068 (insert (comint-quote-filename (directory-file-name completion)))
3069 (cond ((symbolp (file-name-completion completion directory))
3070 ;; We inserted a unique completion.
3071 (insert (if (file-directory-p file) dirsuffix filesuffix))
3072 (unless minibuffer-p
3073 (message "Completed")))
3074 ((and comint-completion-recexact comint-completion-addsuffix
3075 (string-equal filenondir completion)
3076 (file-exists-p file))
3077 ;; It's not unique, but user wants shortest match.
3078 (insert (if (file-directory-p file) dirsuffix filesuffix))
3079 (unless minibuffer-p
3080 (message "Completed shortest")))
3081 ((or comint-completion-autolist
3082 (string-equal filenondir completion))
3083 ;; It's not unique, list possible completions.
3084 (comint-dynamic-list-filename-completions))
3085 (t
3086 (unless minibuffer-p
3087 (message "Partially completed")))))))
3088 success))
3091 (defun comint-replace-by-expanded-filename ()
3092 "Dynamically expand and complete the filename at point.
3093 Replace the filename with an expanded, canonicalized and completed replacement.
3096 removed, and the filename is made absolute instead of relative. For expansion
3097 see `expand-file-name' and `substitute-in-file-name'. For completion see
3098 `comint-dynamic-complete-filename'."
3099 (interactive)
3100 (let ((filename (comint-match-partial-filename)))
3101 (when filename
3102 (replace-match (expand-file-name filename) t t)
3103 (comint-dynamic-complete-filename))))
3106 (defun comint-dynamic-simple-complete (stub candidates)
3107 "Dynamically complete STUB from CANDIDATES list.
3108 This function inserts completion characters at point by completing STUB from
3109 the strings in CANDIDATES. A completions listing may be shown in a help buffer
3110 if completion is ambiguous.
3112 Returns nil if no completion was inserted.
3113 Returns `sole' if completed with the only completion match.
3114 Returns `shortest' if completed with the shortest of the completion matches.
3115 Returns `partial' if completed as far as possible with the completion matches.
3116 Returns `listed' if a completion listing was shown.
3118 See also `comint-dynamic-complete-filename'."
3119 (let* ((completion-ignore-case (memq system-type '(ms-dos windows-nt cygwin)))
3120 (minibuffer-p (window-minibuffer-p (selected-window)))
3121 (suffix (cond ((not comint-completion-addsuffix) "")
3122 ((not (consp comint-completion-addsuffix)) " ")
3123 (t (cdr comint-completion-addsuffix))))
3124 (completions (all-completions stub candidates)))
3125 (cond ((null completions)
3126 (if minibuffer-p
3127 (minibuffer-message "No completions of %s" stub)
3128 (message "No completions of %s" stub))
3129 nil)
3130 ((= 1 (length completions)) ; Gotcha!
3131 (let ((completion (car completions)))
3132 (if (string-equal completion stub)
3133 (unless minibuffer-p
3134 (message "Sole completion"))
3135 (insert (substring completion (length stub)))
3136 (unless minibuffer-p
3137 (message "Completed")))
3138 (insert suffix)
3139 'sole))
3140 (t ; There's no unique completion.
3141 (let ((completion (try-completion stub candidates)))
3142 ;; Insert the longest substring.
3143 (insert (substring completion (length stub)))
3144 (cond ((and comint-completion-recexact comint-completion-addsuffix
3145 (string-equal stub completion)
3146 (member completion completions))
3147 ;; It's not unique, but user wants shortest match.
3148 (insert suffix)
3149 (unless minibuffer-p
3150 (message "Completed shortest"))
3151 'shortest)
3152 ((or comint-completion-autolist
3153 (string-equal stub completion))
3154 ;; It's not unique, list possible completions.
3155 (comint-dynamic-list-completions completions stub)
3156 'listed)
3157 (t
3158 (unless minibuffer-p
3159 (message "Partially completed"))
3160 'partial)))))))
3163 (defun comint-dynamic-list-filename-completions ()
3164 "List in help buffer possible completions of the filename at point."
3165 (interactive)
3166 (let* ((completion-ignore-case read-file-name-completion-ignore-case)
3167 ;; If we bind this, it breaks remote directory tracking in rlogin.el.
3168 ;; I think it was originally bound to solve file completion problems,
3169 ;; but subsequent changes may have made this unnecessary. sm.
3170 ;;(file-name-handler-alist nil)
3171 (filename (or (comint-match-partial-filename) ""))
3172 (filedir (file-name-directory filename))
3173 (filenondir (file-name-nondirectory filename))
3174 (directory (if filedir (comint-directory filedir) default-directory))
3175 (completions (file-name-all-completions filenondir directory)))
3176 (if (not completions)
3177 (if (window-minibuffer-p (selected-window))
3178 (minibuffer-message "No completions of %s" filename)
3179 (message "No completions of %s" filename))
3180 (comint-dynamic-list-completions
3181 (mapcar 'comint-quote-filename completions)
3182 (comint-quote-filename filenondir)))))
3185 ;; This is bound locally in a *Completions* buffer to the list of
3186 ;; completions displayed, and is used to detect the case where the same
3187 ;; command is repeatedly used without the set of completions changing.
3188 (defvar comint-displayed-dynamic-completions nil)
3190 (defvar comint-dynamic-list-completions-config nil)
3192 (defun comint-dynamic-list-completions (completions &optional common-substring)
3193 "List in help buffer sorted COMPLETIONS.
3194 The meaning of COMMON-SUBSTRING is the same as in `display-completion-list'.
3195 Typing SPC flushes the help buffer."
3196 (let ((window (get-buffer-window "*Completions*" 0)))
3197 (setq completions (sort completions 'string-lessp))
3198 (if (and (eq last-command this-command)
3199 window (window-live-p window) (window-buffer window)
3200 (buffer-name (window-buffer window))
3201 ;; The above tests are not sufficient to detect the case where we
3202 ;; should scroll, because the top-level interactive command may
3203 ;; not have displayed a completions window the last time it was
3204 ;; invoked, and there may be such a window left over from a
3205 ;; previous completion command with a different set of
3206 ;; completions. To detect that case, we also test that the set
3207 ;; of displayed completions is in fact the same as the previously
3208 ;; displayed set.
3209 (equal completions
3210 (buffer-local-value 'comint-displayed-dynamic-completions
3211 (window-buffer window))))
3212 ;; If this command was repeated, and
3213 ;; there's a fresh completion window with a live buffer,
3214 ;; and this command is repeated, scroll that window.
3215 (with-current-buffer (window-buffer window)
3216 (if (pos-visible-in-window-p (point-max) window)
3217 (set-window-start window (point-min))
3218 (save-selected-window
3219 (select-window window)
3220 (scroll-up))))
3222 ;; Display a completion list for the first time.
3223 (setq comint-dynamic-list-completions-config
3224 (current-window-configuration))
3225 (with-output-to-temp-buffer "*Completions*"
3226 (display-completion-list completions common-substring))
3227 (if (window-minibuffer-p (selected-window))
3228 (minibuffer-message "Type space to flush; repeat completion command to scroll")
3229 (message "Type space to flush; repeat completion command to scroll")))
3231 ;; Read the next key, to process SPC.
3232 (let (key first)
3233 (if (with-current-buffer (get-buffer "*Completions*")
3234 (set (make-local-variable 'comint-displayed-dynamic-completions)
3235 completions)
3236 (setq key (read-key-sequence nil)
3237 first (aref key 0))
3238 (and (consp first) (consp (event-start first))
3239 (eq (window-buffer (posn-window (event-start first)))
3240 (get-buffer "*Completions*"))
3241 (eq (key-binding key) 'mouse-choose-completion)))
3242 ;; If the user does mouse-choose-completion with the mouse,
3243 ;; execute the command, then delete the completion window.
3244 (progn
3245 (choose-completion first)
3246 (set-window-configuration comint-dynamic-list-completions-config))
3247 (if (eq first ?\s)
3248 (set-window-configuration comint-dynamic-list-completions-config)
3249 (setq unread-command-events (listify-key-sequence key)))))))
3251 \f
3252 (defun comint-get-next-from-history ()
3253 "After fetching a line from input history, this fetches the following line.
3254 In other words, this recalls the input line after the line you recalled last.
3255 You can use this to repeat a sequence of input lines."
3256 (interactive)
3257 (if comint-save-input-ring-index
3258 (progn
3259 (setq comint-input-ring-index (1+ comint-save-input-ring-index))
3260 (comint-next-input 1))
3261 (message "No previous history command")))
3263 (defun comint-accumulate ()
3264 "Accumulate a line to send as input along with more lines.
3265 This inserts a newline so that you can enter more text
3267 to send all the accumulated input, at once.
3268 The entire accumulated text becomes one item in the input history
3269 when you send it."
3270 (interactive)
3272 (set-marker comint-accum-marker (point))
3273 (if comint-input-ring-index
3274 (setq comint-save-input-ring-index
3275 (- comint-input-ring-index 1))))
3277 (defun comint-goto-process-mark ()
3278 "Move point to the process mark.
3279 The process mark separates output, and input already sent,
3280 from input that has not yet been sent."
3281 (interactive)
3282 (let ((proc (or (get-buffer-process (current-buffer))
3283 (error "Current buffer has no process"))))
3284 (goto-char (process-mark proc))
3285 (when (called-interactively-p 'interactive)
3286 (message "Point is now at the process mark"))))
3288 (defun comint-bol-or-process-mark ()
3289 "Move point to beginning of line (after prompt) or to the process mark.
3290 The first time you use this command, it moves to the beginning of the line
3291 \(but after the prompt, if any). If you repeat it again immediately,
3292 it moves point to the process mark.
3294 The process mark separates the process output, along with input already sent,
3295 from input that has not yet been sent. Ordinarily, the process mark
3296 is at the beginning of the current input line; but if you have
3298 the process mark is at the beginning of the accumulated input."
3299 (interactive)
3300 (if (not (eq last-command 'comint-bol-or-process-mark))
3301 (comint-bol nil)
3302 (comint-goto-process-mark)))
3304 (defun comint-set-process-mark ()
3305 "Set the process mark at point."
3306 (interactive)
3307 (let ((proc (or (get-buffer-process (current-buffer))
3308 (error "Current buffer has no process"))))
3309 (set-marker (process-mark proc) (point))
3310 (message "Process mark set")))
3312 \f
3313 ;; Author: Peter Breton <pbreton@cs.umb.edu>
3315 ;; This little add-on for comint is intended to make it easy to get
3316 ;; output from currently active comint buffers into another buffer,
3317 ;; or buffers, and then go back to using the comint shell.
3318 ;;
3319 ;; My particular use is SQL interpreters; I want to be able to execute a
3320 ;; query using the process associated with a comint-buffer, and save that
3321 ;; somewhere else. Because the process might have state (for example, it
3322 ;; could be in an uncommitted transaction), just running starting a new
3323 ;; process and having it execute the query and then finish, would not
3324 ;; work. I'm sure there are other uses as well, although in many cases
3325 ;; starting a new process is the simpler, and thus preferable, approach.
3326 ;;
3327 ;; The basic implementation is as follows: comint-redirect changes the
3328 ;; preoutput filter functions (`comint-preoutput-filter-functions') to use
3329 ;; its own filter. The filter puts the output into the designated buffer,
3330 ;; or buffers, until it sees a regexp that tells it to stop (by default,
3331 ;; this is the prompt for the interpreter, `comint-prompt-regexp'). When it
3332 ;; sees the stop regexp, it restores the old filter functions, and runs
3333 ;; `comint-redirect-hook'.
3334 ;;
3335 ;; Each comint buffer may only use one redirection at a time, but any number
3336 ;; of different comint buffers may be simultaneously redirected.
3337 ;;
3338 ;; NOTE: It is EXTREMELY important that `comint-prompt-regexp' be set to the
3339 ;; correct prompt for your interpreter, or that you supply a regexp that says
3340 ;; when the redirection is finished. Otherwise, redirection will continue
3341 ;; indefinitely. The code now does a sanity check to ensure that it can find
3342 ;; a prompt in the comint buffer; however, it is still important to ensure that
3343 ;; this prompt is set correctly.
3344 ;;
3345 ;; XXX: This doesn't work so well unless `comint-prompt-regexp' is set;
3346 ;; perhaps it should prompt for a terminating string (with an
3347 ;; appropriate magic default by examining what we think is the prompt)?
3348 ;;
3349 ;; Fixme: look for appropriate fields, rather than regexp, if
3350 ;; `comint-use-prompt-regexp' is true.
3352 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3353 ;; Variables
3354 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3356 (defcustom comint-redirect-verbose nil
3357 "If non-nil, print messages each time the redirection filter is invoked.
3358 Also print a message when redirection is completed."
3359 :group 'comint
3360 :type 'boolean)
3362 ;; Directly analagous to comint-preoutput-filter-functions
3363 (defvar comint-redirect-filter-functions nil
3364 "List of functions to call before inserting redirected process output.
3365 Each function gets one argument, a string containing the text received
3366 from the subprocess. It should return the string to insert, perhaps
3367 the same string that was received, or perhaps a modified or transformed
3368 string.
3370 The functions on the list are called sequentially, and each one is given
3371 the string returned by the previous one. The string returned by the
3372 last function is the text that is actually inserted in the redirection buffer.
3374 You can use `add-hook' to add functions to this list
3375 either globally or locally.")
3377 ;; Internal variables
3379 (defvar comint-redirect-output-buffer nil
3380 "The buffer or list of buffers to put output into.")
3382 (defvar comint-redirect-finished-regexp nil
3383 "Regular expression that determines when to stop redirection in Comint.
3384 When the redirection filter function is given output that matches this regexp,
3385 the output is inserted as usual, and redirection is completed.")
3387 (defvar comint-redirect-insert-matching-regexp nil
3388 "If non-nil, the text that ends a redirection is included in it.
3389 More precisely, the text that matches `comint-redirect-finished-regexp'
3390 and therefore terminates an output redirection is inserted in the
3391 redirection target buffer, along with the preceding output.")
3393 (defvar comint-redirect-echo-input nil
3394 "Non-nil means echo input in the process buffer even during redirection.")
3396 (defvar comint-redirect-completed nil
3397 "Non-nil if redirection has completed in the current buffer.")
3399 (defvar comint-redirect-original-mode-line-process nil
3400 "Original mode line for redirected process.")
3402 (defvar comint-redirect-perform-sanity-check t
3403 "If non-nil, check that redirection is likely to complete successfully.
3404 More precisely, before starting a redirection, verify that the
3405 regular expression `comint-redirect-finished-regexp' that controls
3406 when to terminate it actually matches some text already in the process
3407 buffer. The idea is that this regular expression should match a prompt
3408 string, and that there ought to be at least one copy of your prompt string
3409 in the process buffer already.")
3411 (defvar comint-redirect-original-filter-function nil
3412 "The process filter that was in place when redirection is started.
3413 When redirection is completed, the process filter is restored to
3414 this value.")
3416 (defvar comint-redirect-subvert-readonly nil
3417 "Non-nil means `comint-redirect' can insert into read-only buffers.
3418 This works by binding `inhibit-read-only' around the insertion.
3419 This is useful, for instance, for insertion into Help mode buffers.
3420 You probably want to set it locally to the output buffer.")
3422 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3423 ;; Functions
3424 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3426 (defun comint-redirect-setup (output-buffer
3427 comint-buffer
3428 finished-regexp
3429 &optional echo-input)
3430 "Set up for output redirection.
3431 This function sets local variables that are used by `comint-redirect-filter'
3432 to perform redirection.
3434 Output from COMINT-BUFFER is redirected to OUTPUT-BUFFER, until something
3435 in the output matches FINISHED-REGEXP.
3437 If optional argument ECHO-INPUT is non-nil, output is echoed to the
3438 original Comint buffer.
3440 This function is called by `comint-redirect-send-command-to-process',
3441 and does not normally need to be invoked by the end user or programmer."
3442 (with-current-buffer comint-buffer
3444 (make-local-variable 'comint-redirect-original-mode-line-process)
3445 (setq comint-redirect-original-mode-line-process mode-line-process)
3447 (make-local-variable 'comint-redirect-output-buffer)
3448 (setq comint-redirect-output-buffer output-buffer)
3450 (make-local-variable 'comint-redirect-finished-regexp)
3451 (setq comint-redirect-finished-regexp finished-regexp)
3453 (make-local-variable 'comint-redirect-echo-input)
3454 (setq comint-redirect-echo-input echo-input)
3456 (make-local-variable 'comint-redirect-completed)
3457 (setq comint-redirect-completed nil)
3459 (setq mode-line-process
3460 (if mode-line-process
3461 (list (concat (elt mode-line-process 0) " Redirection"))
3462 (list ":%s Redirection")))))
3464 (defun comint-redirect-cleanup ()
3465 "End a Comint redirection. See `comint-redirect-send-command'."
3466 (interactive)
3467 ;; Restore the process filter
3468 (set-process-filter (get-buffer-process (current-buffer))
3469 comint-redirect-original-filter-function)
3470 ;; Restore the mode line
3471 (setq mode-line-process comint-redirect-original-mode-line-process)
3472 ;; Set the completed flag
3473 (setq comint-redirect-completed t))
3475 ;; Because the cleanup happens as a callback, it's not easy to guarantee
3476 ;; that it really occurs.
3477 (defalias 'comint-redirect-remove-redirection 'comint-redirect-cleanup)
3479 (defun comint-redirect-filter (process input-string)
3480 "Filter function which redirects output from PROCESS to a buffer or buffers.
3481 The variable `comint-redirect-output-buffer' says which buffer(s) to
3482 place output in.
3484 INPUT-STRING is the input from the Comint process.
3486 This function runs as a process filter, and does not need to be invoked by the
3487 end user."
3488 (and process
3489 (with-current-buffer (process-buffer process)
3490 (comint-redirect-preoutput-filter input-string)
3491 ;; If we have to echo output, give it to the original filter function
3492 (and comint-redirect-echo-input
3493 comint-redirect-original-filter-function
3494 (funcall comint-redirect-original-filter-function
3495 process input-string)))))
3498 (defun comint-redirect-preoutput-filter (input-string)
3499 "Comint filter function which redirects Comint output to a buffer or buffers.
3500 The variable `comint-redirect-output-buffer' says which buffer(s) to
3501 place output in.
3503 INPUT-STRING is the input from the Comint process.
3505 This function does not need to be invoked by the end user."
3506 (let ((output-buffer-list
3507 (if (listp comint-redirect-output-buffer)
3508 comint-redirect-output-buffer
3509 (list comint-redirect-output-buffer)))
3510 (filtered-input-string input-string))
3512 ;; If there are any filter functions, give them a chance to modify
3513 ;; the string.
3514 (let ((functions comint-redirect-filter-functions))
3515 (while (and functions filtered-input-string)
3516 (if (eq (car functions) t)
3517 ;; If a local value says "use the default value too",
3518 ;; do that.
3519 (let ((functions
3520 (default-value 'comint-redirect-filter-functions)))
3521 (while (and functions filtered-input-string)
3522 (setq filtered-input-string
3523 (funcall (car functions) filtered-input-string))
3524 (setq functions (cdr functions))))
3525 (setq filtered-input-string
3526 (funcall (car functions) filtered-input-string)))
3527 (setq functions (cdr functions))))
3529 ;; Clobber `comint-redirect-finished-regexp'
3530 (or comint-redirect-insert-matching-regexp
3531 (and (string-match comint-redirect-finished-regexp filtered-input-string)
3532 (setq filtered-input-string
3533 (replace-match "" nil nil filtered-input-string))))
3535 ;; Send output to all registered buffers
3536 (save-excursion
3537 (dolist (buf output-buffer-list)
3538 ;; Set this buffer to the output buffer
3539 (set-buffer (get-buffer-create buf))
3540 ;; Go to the end of the buffer
3541 (goto-char (point-max))
3542 ;; Insert the output
3543 (let ((inhibit-read-only comint-redirect-subvert-readonly))
3544 (insert filtered-input-string))))
3546 ;; Message
3547 (and comint-redirect-verbose
3548 (message "Redirected output to buffer(s) %s"
3549 (mapconcat 'identity output-buffer-list " ")))
3551 ;; If we see the prompt, tidy up
3552 ;; We'll look for the prompt in the original string, so nobody can
3553 ;; clobber it
3554 (and (string-match comint-redirect-finished-regexp input-string)
3555 (progn
3556 (and comint-redirect-verbose
3557 (message "Redirection completed"))
3558 (comint-redirect-cleanup)
3559 (run-hooks 'comint-redirect-hook)))
3560 ;; Echo input?
3561 (if comint-redirect-echo-input
3562 filtered-input-string
3563 "")))
3565 ;;;###autoload
3566 (defun comint-redirect-send-command (command output-buffer echo &optional no-display)
3567 "Send COMMAND to process in current buffer, with output to OUTPUT-BUFFER.
3568 With prefix arg ECHO, echo output in process buffer.
3570 If NO-DISPLAY is non-nil, do not show the output buffer."
3572 (let ((process (get-buffer-process (current-buffer))))
3573 (if process
3574 (comint-redirect-send-command-to-process
3575 command output-buffer (current-buffer) echo no-display)
3576 (error "No process for current buffer"))))
3578 ;;;###autoload
3579 (defun comint-redirect-send-command-to-process
3580 (command output-buffer process echo &optional no-display)
3581 "Send COMMAND to PROCESS, with output to OUTPUT-BUFFER.
3582 With prefix arg, echo output in process buffer.
3584 If NO-DISPLAY is non-nil, do not show the output buffer."
3586 (let* (;; The process buffer
3587 (process-buffer (if (processp process)
3588 (process-buffer process)
3589 process))
3590 (proc (get-buffer-process process-buffer)))
3591 ;; Change to the process buffer
3592 (with-current-buffer process-buffer
3594 ;; Make sure there's a prompt in the current process buffer
3595 (and comint-redirect-perform-sanity-check
3596 (save-excursion
3597 (goto-char (point-max))
3598 (or (re-search-backward comint-prompt-regexp nil t)
3599 (error "No prompt found or `comint-prompt-regexp' not set properly"))))
3601 ;; Set up for redirection
3602 (comint-redirect-setup
3603 output-buffer
3604 (current-buffer) ; Comint Buffer
3605 comint-prompt-regexp ; Finished Regexp
3606 echo) ; Echo input
3608 ;; Set the filter
3609 (setq comint-redirect-original-filter-function ; Save the old filter
3610 (process-filter proc))
3611 (set-process-filter proc 'comint-redirect-filter)
3613 ;; Send the command
3616 ;; Show the output
3617 (or no-display
3618 (display-buffer
3619 (get-buffer-create
3620 (if (listp output-buffer)
3621 (car output-buffer)
3622 output-buffer)))))))
3624 ;;;###autoload
3625 (defun comint-redirect-results-list (command regexp regexp-group)
3626 "Send COMMAND to current process.
3627 Return a list of expressions in the output which match REGEXP.
3628 REGEXP-GROUP is the regular expression group in REGEXP to use."
3629 (comint-redirect-results-list-from-process
3630 (get-buffer-process (current-buffer))
3631 command regexp regexp-group))
3633 ;;;###autoload
3634 (defun comint-redirect-results-list-from-process (process command regexp regexp-group)
3635 "Send COMMAND to PROCESS.
3636 Return a list of expressions in the output which match REGEXP.
3637 REGEXP-GROUP is the regular expression group in REGEXP to use."
3638 (let ((output-buffer " *Comint Redirect Work Buffer*")
3639 results)
3640 (with-current-buffer (get-buffer-create output-buffer)
3641 (erase-buffer)
3642 (comint-redirect-send-command-to-process command
3643 output-buffer process nil t)
3644 ;; Wait for the process to complete
3645 (set-buffer (process-buffer process))
3646 (while (null comint-redirect-completed)
3647 (accept-process-output nil 1))
3648 ;; Collect the output
3649 (set-buffer output-buffer)
3650 (goto-char (point-min))
3651 ;; Skip past the command, if it was echoed
3652 (and (looking-at command)
3653 (forward-line))
3654 (while (re-search-forward regexp nil t)
3655 (push (buffer-substring-no-properties
3656 (match-beginning regexp-group)
3657 (match-end regexp-group))
3658 results))
3659 results)))
3661 (dolist (x '("^Not at command line$"
3662 "^Empty input ring$"
3663 "^No history$"
3664 "^Not found$" ; Too common?
3665 "^Current buffer has no process$"))
3666 (add-to-list 'debug-ignored-errors x))
3668 \f
3669 ;; Converting process modes to use comint mode
3670 ;; ===========================================================================
3671 ;; The code in the Emacs 19 distribution has all been modified to use comint
3672 ;; where needed. However, there are `third-party' packages out there that
3673 ;; still use the old shell mode. Here's a guide to conversion.
3674 ;;
3675 ;; Renaming variables
3676 ;; Most of the work is renaming variables and functions. These are the common
3677 ;; ones:
3678 ;; Local variables:
3679 ;; last-input-start comint-last-input-start
3680 ;; last-input-end comint-last-input-end
3681 ;; shell-prompt-pattern comint-prompt-regexp
3682 ;; shell-set-directory-error-hook <no equivalent>
3683 ;; Miscellaneous:
3684 ;; shell-set-directory <unnecessary>
3685 ;; shell-mode-map comint-mode-map
3686 ;; Commands:
3687 ;; shell-send-input comint-send-input
3688 ;; shell-send-eof comint-delchar-or-maybe-eof
3689 ;; kill-shell-input comint-kill-input
3690 ;; interrupt-shell-subjob comint-interrupt-subjob
3691 ;; stop-shell-subjob comint-stop-subjob
3692 ;; quit-shell-subjob comint-quit-subjob
3693 ;; kill-shell-subjob comint-kill-subjob
3694 ;; kill-output-from-shell comint-delete-output
3695 ;; show-output-from-shell comint-show-output
3696 ;; copy-last-shell-input Use comint-previous-input/comint-next-input
3697 ;;
3698 ;; SHELL-SET-DIRECTORY is gone, its functionality taken over by
3699 ;; SHELL-DIRECTORY-TRACKER, the shell mode's comint-input-filter-functions.
3700 ;; Comint mode does not provide functionality equivalent to
3701 ;; shell-set-directory-error-hook; it is gone.
3702 ;;
3703 ;; comint-last-input-start is provided for modes which want to munge
3704 ;; the buffer after input is sent, perhaps because the inferior
3705 ;; insists on echoing the input. The LAST-INPUT-START variable in
3706 ;; the old shell package was used to implement a history mechanism,
3707 ;; but you should think twice before using comint-last-input-start
3708 ;; for this; the input history ring often does the job better.
3709 ;;
3710 ;; If you are implementing some process-in-a-buffer mode, called foo-mode, do
3711 ;; *not* create the comint-mode local variables in your foo-mode function.
3712 ;; This is not modular. Instead, call comint-mode, and let *it* create the
3713 ;; necessary comint-specific local variables. Then create the
3714 ;; foo-mode-specific local variables in foo-mode. Set the buffer's keymap to
3715 ;; be foo-mode-map, and its mode to be foo-mode. Set the comint-mode hooks
3716 ;; (comint-{prompt-regexp, input-filter, input-filter-functions,
3717 ;; get-old-input) that need to be different from the defaults. Call
3718 ;; foo-mode-hook, and you're done. Don't run the comint-mode hook yourself;
3719 ;; comint-mode will take care of it. The following example, from shell.el,
3720 ;; is typical:
3721 ;;
3722 ;; (defvar shell-mode-map '())
3723 ;; (cond ((not shell-mode-map)
3724 ;; (setq shell-mode-map (copy-keymap comint-mode-map))
3725 ;; (define-key shell-mode-map "\C-c\C-f" 'shell-forward-command)
3726 ;; (define-key shell-mode-map "\C-c\C-b" 'shell-backward-command)
3728 ;; (define-key shell-mode-map "\M-?"
3729 ;; 'comint-dynamic-list-filename-completions)))
3730 ;;
3731 ;; (defun shell-mode ()
3732 ;; (interactive)
3733 ;; (comint-mode)
3734 ;; (setq comint-prompt-regexp shell-prompt-pattern)
3735 ;; (setq major-mode 'shell-mode)
3736 ;; (setq mode-name "Shell")
3737 ;; (use-local-map shell-mode-map)
3738 ;; (make-local-variable 'shell-directory-stack)
3739 ;; (setq shell-directory-stack nil)
3740 ;; (add-hook 'comint-input-filter-functions 'shell-directory-tracker)
3741 ;; (run-mode-hooks 'shell-mode-hook))
3742 ;;
3743 ;;
3744 ;; Completion for comint-mode users
3745 ;;
3746 ;; For modes that use comint-mode, comint-dynamic-complete-functions is the
3747 ;; hook to add completion functions to. Functions on this list should return
3748 ;; non-nil if completion occurs (i.e., further completion should not occur).
3749 ;; You could use comint-dynamic-simple-complete to do the bulk of the
3750 ;; completion job.
3751 \f
3753 (provide 'comint)
3755 ;; arch-tag: 1793314c-09db-40be-9549-9aeae3e75164
3756 ;;; comint.el ends here