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1 ;;; comint.el --- general command interpreter in a window stuff
3 ;; Copyright (C) 1988, 90, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001
4 ;; Free Software Foundation, Inc.
6 ;; Author: Olin Shivers <shivers@cs.cmu.edu>
7 ;; Simon Marshall <simon@gnu.org>
8 ;; Maintainer: FSF
9 ;; Keywords: processes
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software; you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; any later version.
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
26 ;; Boston, MA 02111-1307, USA.
28 ;;; Commentary:
30 ;; Please send me bug reports, bug fixes, and extensions, so that I can
31 ;; merge them into the master source.
32 ;; - Olin Shivers (shivers@cs.cmu.edu)
33 ;; - Simon Marshall (simon@gnu.org)
35 ;; This file defines a general command-interpreter-in-a-buffer package
36 ;; (comint mode). The idea is that you can build specific process-in-a-buffer
37 ;; modes on top of comint mode -- e.g., lisp, shell, scheme, T, soar, ....
38 ;; This way, all these specific packages share a common base functionality,
39 ;; and a common set of bindings, which makes them easier to use (and
40 ;; saves code, implementation time, etc., etc.).
42 ;; Several packages are already defined using comint mode:
43 ;; - shell.el defines a shell-in-a-buffer mode.
44 ;; - cmulisp.el defines a simple lisp-in-a-buffer mode.
45 ;;
46 ;; - The file cmuscheme.el defines a scheme-in-a-buffer mode.
47 ;; - The file tea.el tunes scheme and inferior-scheme modes for T.
48 ;; - The file soar.el tunes lisp and inferior-lisp modes for Soar.
49 ;; - cmutex.el defines tex and latex modes that invoke tex, latex, bibtex,
50 ;; previewers, and printers from within emacs.
51 ;; - background.el allows csh-like job control inside emacs.
52 ;; It is pretty easy to make new derived modes for other processes.
54 ;; For documentation on the functionality provided by comint mode, and
55 ;; the hooks available for customising it, see the comments below.
56 ;; For further information on the standard derived modes (shell,
57 ;; inferior-lisp, inferior-scheme, ...), see the relevant source files.
59 ;; For hints on converting existing process modes (e.g., tex-mode,
60 ;; background, dbx, gdb, kermit, prolog, telnet) to use comint-mode
61 ;; instead of shell-mode, see the notes at the end of this file.
63 \f
64 ;; Brief Command Documentation:
65 ;;============================================================================
66 ;; Comint Mode Commands: (common to all derived modes, like shell & cmulisp
67 ;; mode)
68 ;;
69 ;; m-p comint-previous-input Cycle backwards in input history
70 ;; m-n comint-next-input Cycle forwards
71 ;; m-r comint-previous-matching-input Previous input matching a regexp
72 ;; m-s comint-next-matching-input Next input that matches
73 ;; m-c-l comint-show-output Show last batch of process output
74 ;; return comint-send-input
75 ;; c-d comint-delchar-or-maybe-eof Delete char unless at end of buff
76 ;; c-c c-a comint-bol-or-process-mark First time, move point to bol;
77 ;; second time, move to process-mark.
78 ;; c-c c-u comint-kill-input ^u
79 ;; c-c c-w backward-kill-word ^w
80 ;; c-c c-c comint-interrupt-subjob ^c
81 ;; c-c c-z comint-stop-subjob ^z
82 ;; c-c c-\ comint-quit-subjob ^\
83 ;; c-c c-o comint-delete-output Delete last batch of process output
84 ;; c-c c-r comint-show-output Show last batch of process output
85 ;; c-c c-l comint-dynamic-list-input-ring List input history
86 ;;
87 ;; Not bound by default in comint-mode (some are in shell mode)
88 ;; comint-run Run a program under comint-mode
89 ;; send-invisible Read a line w/o echo, and send to proc
90 ;; comint-dynamic-complete-filename Complete filename at point.
91 ;; comint-dynamic-list-filename-completions List completions in help buffer.
92 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
93 ;; replace with expanded/completed name.
94 ;; comint-replace-by-expanded-history Expand history at point;
95 ;; replace with expanded name.
96 ;; comint-magic-space Expand history and add (a) space(s).
97 ;; comint-kill-subjob No mercy.
98 ;; comint-show-maximum-output Show as much output as possible.
99 ;; comint-continue-subjob Send CONT signal to buffer's process
100 ;; group. Useful if you accidentally
101 ;; suspend your process (with C-c C-z).
102 ;; comint-get-next-from-history Fetch successive input history lines
103 ;; comint-accumulate Combine lines to send them together
104 ;; as input.
105 ;; comint-goto-process-mark Move point to where process-mark is.
106 ;; comint-set-process-mark Set process-mark to point.
108 ;; comint-mode-hook is the comint mode hook. Basically for your keybindings.
110 ;;; Code:
113 \f
114 ;; Buffer Local Variables:
115 ;;============================================================================
116 ;; Comint mode buffer local variables:
117 ;; comint-prompt-regexp string comint-bol uses to match prompt
118 ;; comint-delimiter-argument-list list For delimiters and arguments
119 ;; comint-last-input-start marker Handy if inferior always echoes
120 ;; comint-last-input-end marker For comint-delete-output command
121 ;; comint-input-ring-size integer For the input history
122 ;; comint-input-ring ring mechanism
123 ;; comint-input-ring-index number ...
124 ;; comint-save-input-ring-index number ...
125 ;; comint-input-autoexpand symbol ...
126 ;; comint-input-ignoredups boolean ...
127 ;; comint-dynamic-complete-functions hook For the completion mechanism
128 ;; comint-completion-fignore list ...
129 ;; comint-file-name-chars string ...
130 ;; comint-file-name-quote-list list ...
131 ;; comint-get-old-input function Hooks for specific
132 ;; comint-input-filter-functions hook process-in-a-buffer
133 ;; comint-output-filter-functions hook function modes.
134 ;; comint-preoutput-filter-functions hook
135 ;; comint-input-filter function ...
136 ;; comint-input-sender function ...
137 ;; comint-eol-on-send boolean ...
138 ;; comint-process-echoes boolean ...
139 ;; comint-scroll-to-bottom-on-input symbol For scroll behavior
140 ;; comint-scroll-to-bottom-on-output symbol ...
141 ;; comint-scroll-show-maximum-output boolean ...
142 ;; comint-accum-marker maker For comint-accumulate
143 ;; comint-last-output-overlay overlay
144 ;;
145 ;; Comint mode non-buffer local variables:
146 ;; comint-completion-addsuffix boolean/cons For file name
147 ;; comint-completion-autolist boolean completion behavior
148 ;; comint-completion-recexact boolean ...
151 "General command interpreter in a window stuff."
155 "Completion facilities in comint"
159 "Source finding facilities in comint"
164 "Regexp to recognise prompts in the inferior process.
167 This variable is only used if the variable
168 `comint-use-prompt-regexp-instead-of-fields' is non-nil.
170 Good choices:
181 "List of characters to recognise as separate arguments in input.
182 Strings comprising a character in this list will separate the arguments
183 surrounding them, and also be regarded as arguments in their own right (unlike
184 whitespace). See `comint-arguments'.
185 Defaults to the empty list.
192 "*If non-nil, expand input command history references on completion.
193 This mirrors the optional behavior of tcsh (its autoexpand and histlit).
195 If the value is `input', then the expansion is seen on input.
196 If the value is `history', then the expansion is only when inserting
197 into the buffer's input ring. See also `comint-magic-space' and
198 `comint-dynamic-complete'.
200 This variable is buffer-local."
208 "*If non-nil, highlight input; also allow choosing previous input with a mouse.
209 The face used is `comint-highlight-input'."
214 "Face to use to highlight input when `comint-highlight-input' is non-nil."
218 "*If non-nil, highlight program prompts.
219 The face used is `comint-highlight-prompt'."
226 "Face to use to highlight prompt when `comint-highlight-prompt' is non-nil."
230 "*If non-nil, don't add input matching the last on the input ring.
231 This mirrors the optional behavior of bash.
233 This variable is buffer-local."
238 "*If non-nil, name of the file to read/write input history.
239 See also `comint-read-input-ring' and `comint-write-input-ring'.
241 This variable is buffer-local, and is a good thing to set in mode hooks."
243 file)
247 "*Controls whether input to interpreter causes window to scroll.
248 If nil, then do not scroll. If t or `all', scroll all windows showing buffer.
249 If `this', scroll only the selected window.
251 The default is nil.
253 See `comint-preinput-scroll-to-bottom'. This variable is buffer-local."
261 "*Controls whether interpreter output causes window to scroll.
262 If nil, then do not scroll. If t or `all', scroll all windows showing buffer.
263 If `this', scroll only the selected window.
264 If `others', scroll only those that are not the selected window.
266 The default is nil.
268 See variable `comint-scroll-show-maximum-output' and function
269 `comint-postoutput-scroll-to-bottom'. This variable is buffer-local."
278 "*Controls how interpreter output causes window to scroll.
279 If non-nil, then show the maximum output when the window is scrolled.
281 See variable `comint-scroll-to-bottom-on-output' and function
282 `comint-postoutput-scroll-to-bottom'. This variable is buffer-local."
287 "*The maximum size in lines for comint buffers.
288 Comint buffers are truncated from the top to be no greater than this number, if
289 the function `comint-truncate-buffer' is on `comint-output-filter-functions'."
303 "*If non-nil, assume that the subprocess echoes any input.
304 If so, delete one copy of the input so that only one copy eventually
305 appears in the buffer.
307 This variable is buffer-local."
311 ;; AIX puts the name of the person being su'd to in front of the prompt.
312 ;; kinit prints a prompt like `Password for devnull@GNU.ORG: '.
313 ;; ksu prints a prompt like `Kerberos password for devnull/root@GNU.ORG: '.
314 ;; ssh-add prints a prompt like `Enter passphrase: '.
315 ;; Some implementations of passwd use "Password (again)" as the 2nd prompt.
320 "*Regexp matching prompts for passwords in the inferior process.
321 This is used by `comint-watch-for-password-prompt'."
325 ;; Here are the per-interpreter hooks.
327 "Function that returns old text in comint mode.
328 This function is called when return is typed while the point is in old
329 text. It returns the text to be submitted as process input. The
330 default is `comint-get-old-input-default', which either grabs the
331 current input field or grabs the current line and strips off leading
332 text matching `comint-prompt-regexp', depending on the value of
337 "List of functions called to perform completion.
338 Functions should return non-nil if completion was performed.
339 See also `comint-dynamic-complete'.
345 "Predicate for filtering additions to input history.
346 Takes one argument, the input. If non-nil, the input may be saved on the input
350 "Functions to call before input is sent to the process.
351 These functions get one argument, a string containing the text to send.
353 You can use `add-hook' to add functions to this list
357 "Functions to call after output is inserted into the buffer.
358 One possible function is `comint-postoutput-scroll-to-bottom'.
359 These functions get one argument, a string containing the text as originally
360 inserted. Note that this might not be the same as the buffer contents between
361 `comint-last-output-start' and the buffer's `process-mark', if other filter
362 functions have already modified the buffer.
364 See also `comint-preoutput-filter-functions'.
366 You can use `add-hook' to add functions to this list
373 "Function to actually send to PROCESS the STRING submitted by user.
374 Usually this is just `comint-simple-send', but if your mode needs to
375 massage the input string, put a different function here.
376 `comint-simple-send' just sends the string plus a newline.
377 \(If `comint-input-sender-no-newline' is non-nil, it omits the newline.)
381 "*Non-nil means go to the end of the line before sending input.
382 See `comint-send-input'."
386 ;; Note: If it is decided to purge comint-prompt-regexp from the source
387 ;; entirely, searching for uses of this variable will help to identify
388 ;; places that need attention.
390 "*If non-nil, use `comint-prompt-regexp' to distinguish prompts from user-input.
391 If nil, then program output and user-input are given different `field'
392 properties, which emacs commands can use to distinguish them (in
393 particular, common movement commands such as begining-of-line respect
394 field boundaries in a natural way)."
399 "Called upon entry into `comint-mode'
400 This is run before the process is cranked up."
405 "Called each time a process is exec'd by `comint-exec'.
406 This is called after the process is cranked up. It is useful for things that
407 must be done each time a process is executed in a comint mode buffer (e.g.,
408 `(process-kill-without-query)'). In contrast, the `comint-mode-hook' is only
409 executed once when the buffer is created."
416 "Non-nil if communications via pty; false if by pipe. Buffer local.
428 "Last input ring index which you copied.
432 "Non-nil if you are accumulating input lines to send as input together.
451 "Major mode for interacting with an inferior interpreter.
452 Interpreter name is same as buffer name, sans the asterisks.
453 Return at end of buffer sends line as input.
454 Return not at end copies rest of line to end and sends it.
455 Setting variable `comint-eol-on-send' means jump to the end of the line
456 before submitting new input.
458 This mode is customised to create major modes such as Inferior Lisp
459 mode, Shell mode, etc. This can be done by setting the hooks
460 `comint-input-filter-functions', `comint-input-filter', `comint-input-sender'
461 and `comint-get-old-input' to appropriate functions, and the variable
462 `comint-prompt-regexp' to the appropriate regular expression.
464 An input history is maintained of size `comint-input-ring-size', and
465 can be accessed with the commands \\[comint-next-input], \\[comint-previous-input], and \\[comint-dynamic-list-input-ring].
466 Input ring history expansion can be achieved with the commands
468 Input ring expansion is controlled by the variable `comint-input-autoexpand',
469 and addition is controlled by the variable `comint-input-ignoredups'.
471 Commands with no default key bindings include `send-invisible',
472 `comint-dynamic-complete', `comint-dynamic-list-filename-completions', and
473 `comint-magic-space'.
475 Input to, and output from, the subprocess can cause the window to scroll to
476 the end of the buffer. See variables `comint-output-filter-functions',
477 `comint-preoutput-filter-functions', `comint-scroll-to-bottom-on-input',
478 and `comint-scroll-to-bottom-on-output'.
481 to continue it.
485 Entry to this mode runs the hooks on `comint-mode-hook'."
522 ;; This behavior is not useful in comint buffers, and is annoying
526 nil
527 ;; Keys:
558 ;; Mouse Buttons:
560 ;; Menu bars:
561 ;; completion:
572 ;; Input history:
613 ;; Signals
628 ;; Put them in the menu bar:
630 menu-bar-final-items))
631 )
634 "Return t if there is a living process associated w/buffer BUFFER.
635 Living means the status is `open', `run', or `stop'.
636 BUFFER can be either a buffer or the name of one."
640 ;;;###autoload
642 "Make a comint process NAME in BUFFER, running PROGRAM.
643 If BUFFER is nil, it defaults to NAME surrounded by `*'s.
644 PROGRAM should be either a string denoting an executable program to create
645 via `start-process', or a cons pair of the form (HOST . SERVICE) denoting a TCP
646 connection to be opened via `open-network-stream'. If there is already a
647 running process in that buffer, it is not restarted. Optional third arg
648 STARTFILE is the name of a file to send the contents of to the process.
650 If PROGRAM is a string, any more args are arguments to PROGRAM."
654 ;; If no process, or nuked process, crank up a new one and put buffer in
655 ;; comint mode. Otherwise, leave buffer and existing process alone.
661 buffer)
663 ;;;###autoload
665 "Make a comint process NAME in a buffer, running PROGRAM.
666 The name of the buffer is made by surrounding NAME with `*'s.
667 PROGRAM should be either a string denoting an executable program to create
668 via `start-process', or a cons pair of the form (HOST . SERVICE) denoting a TCP
669 connection to be opened via `open-network-stream'. If there is already a
670 running process in that buffer, it is not restarted. Optional third arg
671 STARTFILE is the name of a file to send the contents of to the process.
673 If PROGRAM is a string, any more args are arguments to PROGRAM."
676 ;;;###autoload
678 "Run PROGRAM in a comint buffer and switch to it.
679 The buffer name is made by surrounding the file name of PROGRAM with `*'s.
680 The file name is used to make a symbol name, such as `comint-sh-hook', and any
681 hooks on this symbol are run in the buffer.
682 See `make-comint' and `comint-exec'."
689 "Start up a process in buffer BUFFER for comint modes.
690 Blasts any old process running in the buffer. Doesn't set the buffer mode.
691 You can use this to cheaply run a series of processes in the same comint
692 buffer. The hook `comint-exec-hook' is run after each exec."
697 ;; Crank up a new process
705 ;; Jump to the end, and set the process mark.
708 ;; Feed it the startfile.
710 ;;This is guaranteed to wait long enough
711 ;;but has bad results if the comint does not prompt at all
712 ;; (while (= size (buffer-size))
713 ;; (sleep-for 1))
714 ;;I hope 1 second is enough!
722 buffer)))
724 ;; This auxiliary function cranks up the process for comint-exec in
725 ;; the appropriate environment.
730 ;; If using termcap, we specify `emacs' as the terminal type
731 ;; because that lets us specify a width.
732 ;; If using terminfo, we specify `dumb' because that is
733 ;; a defined terminal type. `emacs' is not a defined terminal type
734 ;; and there is no way for us to define it here.
735 ;; Some programs that use terminfo get very confused
736 ;; if TERM is not a valid terminal type.
737 ;; ;; There is similar code in compile.el.
744 process-environment))
747 default-directory
749 proc decoding encoding changed)
751 ;; If the command has slashes, make sure we
752 ;; first look relative to the current directory.
758 ;; If start-process decided to use some coding system for decoding
759 ;; data sent from the process and the coding system doesn't
760 ;; specify EOL conversion, we had better convert CRLF to LF.
763 changed t))
764 ;; Even if start-process left the coding system for encoding data
765 ;; sent from the process undecided, we had better use the same one
766 ;; as what we use for decoding. But, we should suppress EOL
767 ;; conversion.
770 changed t))
773 proc))
777 "In a comint buffer, set the current input to the clicked-on previous input."
780 ;; Ignore non-input overlays
784 ;; Do we have input in this area?
790 ;; Can't use kill-region as it sets this-command
795 ;; Fall back to the global definition.
801 \f
802 ;; Input history processing in a buffer
803 ;; ===========================================================================
804 ;; Useful input history functions, courtesy of the Ergo group.
806 ;; Eleven commands:
807 ;; comint-dynamic-list-input-ring List history in help buffer.
808 ;; comint-previous-input Previous input...
809 ;; comint-previous-matching-input ...matching a string.
810 ;; comint-previous-matching-input-from-input ... matching the current input.
811 ;; comint-next-input Next input...
812 ;; comint-next-matching-input ...matching a string.
813 ;; comint-next-matching-input-from-input ... matching the current input.
814 ;; comint-backward-matching-input Backwards input...
815 ;; comint-forward-matching-input ...matching a string.
816 ;; comint-replace-by-expanded-history Expand history at point;
817 ;; replace with expanded history.
818 ;; comint-magic-space Expand history and insert space.
819 ;;
820 ;; Three functions:
821 ;; comint-read-input-ring Read into comint-input-ring...
822 ;; comint-write-input-ring Write to comint-input-ring-file-name.
823 ;; comint-replace-by-expanded-history-before-point Workhorse function.
826 "Sets the buffer's `comint-input-ring' from a history file.
827 The name of the file is given by the variable `comint-input-ring-file-name'.
828 The history ring is of size `comint-input-ring-size', regardless of file size.
829 If `comint-input-ring-file-name' is nil this function does nothing.
831 If the optional argument SILENT is non-nil, we say nothing about a
832 failure to read the history file.
834 This function is useful for major mode commands and mode hooks.
836 The commands stored in the history file are separated by the
837 `comint-input-ring-separator', and entries that match
838 `comint-input-history-ignore' are ignored. The most recent command
839 comes last.
841 See also `comint-input-ignoredups' and `comint-write-input-ring'."
844 nil)
848 comint-input-ring-file-name)))
861 ;; Save restriction in case file is already visited...
862 ;; Watch for those date stamps in history files!
882 comint-input-ring-index nil)))))
885 "Writes the buffer's `comint-input-ring' to a history file.
886 The name of the file is given by the variable `comint-input-ring-file-name'.
887 The original contents of the file are lost if `comint-input-ring' is not empty.
888 If `comint-input-ring-file-name' is nil this function does nothing.
890 Useful within process sentinels.
892 See also `comint-read-input-ring'."
896 nil)
904 ;; Write it all out into a buffer first. Much faster, but messier,
905 ;; than writing it one line at a time.
919 "Choose the input history entry that point is in or next to."
936 "List in help buffer the buffer's input history."
945 ;; We have to build up a list ourselves from the ring vector.
949 ;; Change "completion" to "history reference"
950 ;; to make the display accurate.
971 ;; Return list of regexp and prefix arg using PROMPT.
979 regexp)
983 ;; First make sure there is a ring and that we are after the process mark
990 ;; arg of zero resets search from beginning, and uses arg of 1
994 arg)))
997 ;; Index to start a directional search, starting at comint-input-ring-index
999 ;; If a search is running, offset by 1 in direction of arg
1002 ;; For a new search, start from beginning or end, as appropriate
1008 "Return the string ARG places along the input ring.
1009 Moves relative to `comint-input-ring-index'."
1013 arg)))
1016 "Cycle backwards through input history."
1021 "Cycle forwards through input history."
1026 "Return the string matching REGEXP ARG places along the input ring.
1027 Moves relative to `comint-input-ring-index'."
1032 "Return the index matching REGEXP ARG places along the input ring.
1033 Moves relative to START, or `comint-input-ring-index'."
1042 ;; Do the whole search as many times as the argument says.
1044 ;; Step once.
1047 ;; If we haven't reached a match, step some more.
1051 ;; If we have gone all the way around in this search.
1054 ;; Now that we know which ring element to use, if we found it, return that.
1056 n)))
1059 "Search backwards through input history for match for REGEXP.
1060 \(Previous history elements are earlier commands.)
1061 With prefix argument N, search for Nth previous match.
1062 If N is negative, find the next or Nth next match."
1066 ;; Has a match been found?
1072 ;; Can't use kill-region as it sets this-command
1079 "Search forwards through input history for match for REGEXP.
1080 \(Later history elements are more recent commands.)
1081 With prefix argument N, search for Nth following match.
1082 If N is negative, find the previous or Nth previous match."
1087 "Search backwards through input history for match for current input.
1088 \(Previous history elements are earlier commands.)
1089 With prefix argument N, search for Nth previous match.
1090 If N is negative, search forwards for the -Nth following match."
1093 comint-next-matching-input-from-input)))
1094 ;; Starting a new search
1100 comint-input-ring-index nil))
1103 arg))
1106 "Search forwards through input history for match for current input.
1107 \(Following history elements are more recent commands.)
1108 With prefix argument N, search for Nth following match.
1109 If N is negative, search backwards for the -Nth previous match."
1115 "Expand input command history references before point.
1116 Expansion is dependent on the value of `comint-input-autoexpand'.
1118 This function depends on the buffer's idea of the input history, which may not
1119 match the command interpreter's idea, assuming it has one.
1121 Assumes history syntax is like typical Un*x shells'. However, since emacs
1122 cannot know the interpreter's idea of input line numbers, assuming it has one,
1123 it cannot expand absolute input line number references.
1125 If the optional argument SILENT is non-nil, never complain
1126 even if history reference seems erroneous.
1128 If the optional argument START is non-nil, that specifies the
1129 start of the text to scan for history references, rather
1130 than the logical beginning of line.
1132 See `comint-magic-space' and `comint-replace-by-expanded-history-before-point'.
1134 Returns t if successful."
1138 ;; Use comint-prompt-regexp
1142 ;; Use input fields. User input that hasn't been entered
1143 ;; yet, at the end of the buffer, has a nil `field' property.
1146 ;; Looks like there might be history references in the command.
1153 "Expand directory stack reference before point.
1154 See `comint-replace-by-expanded-history'. Returns t if successful.
1156 If the optional argument START is non-nil, that specifies the
1157 start of the text to scan for history references, rather
1158 than the logical beginning of line."
1166 ;; This seems a bit complex. We look for references such as !!, !-num,
1167 ;; !foo, !?foo, !{bar}, !?{bar}, ^oh, ^my^, ^god^it, ^never^ends^.
1168 ;; If that wasn't enough, the plings can be suffixed with argument
1169 ;; range specifiers.
1170 ;; Argument ranges are complex too, so we hive off the input line,
1171 ;; referenced with plings, with the range string to `comint-args'.
1175 ;; The history is quoted, or we're in quotes.
1178 ;; We cannot know the interpreter's idea of input line numbers.
1182 ;; Just a number of args from `number' lines backward.
1191 t t)
1197 ;; Just a number of args from the previous input line.
1201 t t)
1205 ;; Most recent input starting with or containing (possibly
1206 ;; protected) string, maybe just a number of args. Phew.
1224 t t)
1227 ;; Quick substitution on the previous input line.
1244 "Expand input history references before point and insert ARG spaces.
1245 A useful command to bind to SPC. See `comint-replace-by-expanded-history'."
1249 \f
1251 "Return t if the number of quotes between BEG and END is odd.
1252 Quotes are single and double."
1258 "Return number of matches for REGEXP from BEG to END."
1265 count))
1268 ;; From STRING, return the args depending on the range specified in the text
1269 ;; from BEGIN to END. If BEGIN is nil, assume all args. Ignore leading `:'.
1270 ;; Range can be x-y, x-, -y, where x/y can be [0-9], *, ^, $.
1286 ;; Return a list of arguments from ARG. Break it up at the
1287 ;; delimiters in comint-delimiter-argument-list. Returned list is backwards.
1302 comint-delimiter-argument-list)))
1305 args)))
1308 "Return from STRING the NTH to MTH arguments.
1309 NTH and/or MTH can be nil, which means the last argument.
1310 Returned arguments are separated by single spaces.
1311 We assume whitespace separates arguments, except within quotes
1312 and except for a space or tab that immediately follows a backslash.
1313 Also, a run of one or more of a single character
1314 in `comint-delimiter-argument-list' is a separate argument.
1315 Argument 0 is the command name."
1316 ;; The first line handles ordinary characters and backslash-sequences
1317 ;; (except with w32 msdos-like shells, where backslashes are valid).
1318 ;; The second matches "-quoted strings.
1319 ;; The third matches '-quoted strings.
1320 ;; The fourth matches `-quoted strings.
1321 ;; This seems to fit the syntax of BASH 2.0.
1332 beg str value quotes)
1333 ;; Build a list of all the args until we have as many as we want.
1337 ;; It's contiguous, part of the same arg.
1340 ;; It's a new separate arg.
1342 ;; Put the previous arg, if there was one, onto ARGS.
1359 \f
1360 ;;
1361 ;; Input processing stuff
1362 ;;
1364 "Add CMD to the input history.
1365 Ignore duplicates if `comint-input-ignoredups' is non-nil."
1371 cmd))))
1375 "Send input to process.
1376 After the process output mark, sends all text from the process mark to
1377 point as input to the process. Before the process output mark, calls
1378 value of variable `comint-get-old-input' to retrieve old input, copies
1379 it to the process mark, and sends it. A terminal newline is also
1380 inserted into the buffer and sent to the process.
1382 Any history reference may be expanded depending on the value of the variable
1383 `comint-input-autoexpand'. The list of function names contained in the value
1384 of `comint-input-filter-functions' is called on the input before sending it.
1385 The input is entered into the input history ring, if the value of variable
1386 `comint-input-filter' returns non-nil when called on the input.
1388 If variable `comint-eol-on-send' is non-nil, then point is moved to the
1389 end of line before sending the input.
1391 After the input has been sent, if `comint-process-echoes' is non-nil,
1392 then comint-send-input waits to see if the process outputs a string
1393 matching the input, and if so, deletes that part of the output.
1395 The values of `comint-get-old-input', `comint-input-filter-functions', and
1396 `comint-input-filter' are chosen according to the command interpreter running
1397 in the buffer. E.g.,
1399 If the interpreter is the csh,
1400 comint-get-old-input is the default:
1401 If `comint-use-prompt-regexp-instead-of-fields' is nil, then
1402 either return the current input field, if point is on an input
1403 field, or the current line, if point is on an output field.
1404 If `comint-use-prompt-regexp-instead-of-fields' is non-nil, then
1405 return the current line with any initial string matching the
1406 regexp `comint-prompt-regexp' removed.
1409 comint-input-filter is the default: returns t if the input isn't all white
1410 space.
1412 If the comint is Lucid Common Lisp,
1413 comint-get-old-input snarfs the sexp ending at point.
1414 comint-input-filter-functions does nothing.
1415 comint-input-filter returns nil if the input matches input-filter-regexp,
1416 which matches (1) all whitespace (2) :a, :c, etc.
1418 Similarly for Soar, Scheme, etc."
1420 ;; Note that the input string does not include its terminal newline.
1430 copy)))
1432 ;; Just whatever's already there
1433 intxt
1434 ;; Expand and leave it visible in buffer
1438 input
1439 ;; This is messy 'cos ultimately the original
1440 ;; functions used do insertion, rather than return
1441 ;; strings. We have to expand, then insert back.
1447 copy))))
1461 ;; Make an overlay for the input field
1464 ;; Give old user input a field property of `input', to
1465 ;; distinguish it from both process output and unsent
1466 ;; input. The terminating newline is put into a special
1467 ;; `boundary' field to make cursor movement between input
1468 ;; and output fields smoother.
1474 'help-echo
1478 ;; Make an overlay for the terminating newline
1488 ;; Update the markers before we send the input
1489 ;; in case we get output amidst sending the input.
1493 ;; clear the "accumulation" marker
1498 ;; Optionally delete echoed input (after checking it).
1501 comint-last-input-start)))
1502 ;; Wait for all input to be echoed:
1508 nil comint-last-input-start
1510 ;; Above difference is equivalent to
1511 ;; (+ comint-last-input-start
1512 ;; (- (point-max) comint-last-input-end))
1519 nil comint-last-input-start comint-last-input-end
1520 nil comint-last-input-end
1525 ;; This used to call comint-output-filter-functions,
1526 ;; but that scrolled the buffer in undesirable ways.
1530 "List of functions to call before inserting Comint output into the buffer.
1531 Each function gets one argument, a string containing the text received
1532 from the subprocess. It should return the string to insert, perhaps
1533 the same string that was received, or perhaps a modified or transformed
1534 string.
1536 The functions on the list are called sequentially, and each one is
1537 given the string returned by the previous one. The string returned by
1538 the last function is the text that is actually inserted in the
1539 redirection buffer.
1541 You can use `add-hook' to add functions to this list
1544 ;; When non-nil, this is the last overlay used for output.
1545 ;; It is kept around so that we can extend it instead of creating
1546 ;; multiple contiguous overlays for multiple contiguous output chunks.
1549 ;; When non-nil, this is an overlay over the last recognized prompt in
1550 ;; the buffer; it is used when highlighting the prompt.
1553 ;; `snapshot' any current comint-last-prompt-overlay, freezing it in place.
1554 ;; Any further output will then create a new comint-last-prompt-overlay.
1561 "Handle carriage control characters in comint output.
1562 Translate carriage return/linefeed sequences to linefeeds.
1563 Make single carriage returns delete to the beginning of the line.
1564 Make backspaces delete the previous character.
1566 This function should be in the list `comint-output-filter-functions'."
1568 ;; We first check to see if STRING contains any magic characters, to
1569 ;; avoid overhead in the common case where it does not
1577 ;; CR LF -> LF
1578 ;; Note that this won't work properly when the CR and LF
1579 ;; are in different output chunks, but this is probably an
1580 ;; exceedingly rare case (because they are generally
1581 ;; written as a unit), and to delay interpretation of a
1582 ;; trailing CR in a chunk would result in odd interactive
1583 ;; behavior (and this case is probably far more common).
1587 ;; bare CR -> delete preceding line
1591 ;; BS -> delete preceding character
1598 ;; The purpose of using this filter for comint processes
1599 ;; is to keep comint-last-input-end from moving forward
1600 ;; when output is inserted.
1603 ;; First check for killed buffer or no input.
1606 ;; Run preoutput filters
1617 ;; Insert STRING
1619 ;; Avoid the overhead of save-excursion, since we just
1620 ;; fiddle with the point
1623 ;; The point should float after any insertion we do
1626 ;; We temporarly remove any buffer narrowing, in case the
1627 ;; process mark is outside of the restriction
1634 ;; insert-before-markers is a bad thing. XXX
1635 ;;
1636 ;; It is used here to force window-point markers (used to
1637 ;; store the value of point in non-selected windows) to
1638 ;; advance, but it also screws up any other markers that we
1639 ;; don't _want_ to advance, such as the start-marker of some
1640 ;; of the overlays we create.
1641 ;;
1642 ;; We work around the problem with the overlays by
1643 ;; explicitly adjusting them after we do the insertion, but
1644 ;; in the future this problem should be solved correctly, by
1645 ;; using `insert', and making the insertion-type of
1646 ;; window-point markers settable (via a buffer-local
1647 ;; variable). In comint buffers, this variable would be set
1648 ;; to `t', to cause point in non-select windows to advance.
1650 ;; Fixup markers and overlays that got screwed up because we
1651 ;; used `insert-before-markers'.
1653 ;; comint-last-output-start
1655 ;; comint-last-input-end
1660 ;; No overlays we create are set to advance upon insertion
1661 ;; (at the start/end), so we assume that any overlay which
1662 ;; is at the current point was incorrectly advanced by
1663 ;; insert-before-markers. First fixup overlays that might
1664 ;; start at point:
1669 old-point
1671 ;; Then do overlays that might end at point:
1676 old-point))))
1678 ;; Advance process-mark
1682 ;; We check to see if the last overlay used for output is
1683 ;; adjacent to the new input, and if so, just extend it.
1687 ;; Extend comint-last-output-overlay to include the
1688 ;; most recent output
1692 ;; Create a new overlay
1700 ;; Highlight the prompt, where we define `prompt' to mean
1701 ;; the most recent output that doesn't end with a newline.
1703 ;; Need to create or move the prompt overlay (in the case
1704 ;; where there is no prompt ((bolp) == t), we still do
1705 ;; this if there's already an existing overlay).
1708 ;; Just move an existing overlay
1711 ;; Need to create the overlay
1722 "Go to the end of buffer in all windows showing it.
1723 Movement occurs if point in the selected window is not after the process mark,
1724 and `this-command' is an insertion command. Insertion commands recognised
1725 are `self-insert-command', `comint-magic-space', `yank', and `hilit-yank'.
1726 Depends on the value of `comint-scroll-to-bottom-on-input'.
1728 This function should be a pre-command hook."
1731 hilit-yank)))
1747 nil t))))))
1750 "Go to the end of buffer in all windows showing it.
1751 Does not scroll if the current line is the last line in the buffer.
1752 Depends on the value of `comint-scroll-to-bottom-on-output' and
1753 `comint-scroll-show-maximum-output'.
1755 This function should be in the list `comint-output-filter-functions'."
1769 ;; Maybe user wants point to jump to end.
1772 ;; If point was at the end, keep it at end.
1776 ;; Optionally scroll so that the text
1777 ;; ends at the bottom of the window.
1784 nil t))
1788 "Truncate the buffer to `comint-buffer-maximum-size'.
1789 This function could be on `comint-output-filter-functions' or bound to a key."
1798 "Strip trailing `^M' characters from the current output group.
1799 This function could be on `comint-output-filter-functions' or bound to a key."
1812 "Put the end of the buffer at the bottom of the window."
1818 "Default for `comint-get-old-input'.
1819 If `comint-use-prompt-regexp-instead-of-fields' is nil, then either
1820 return the current input field, if point is on an input field, or the
1821 current line, if point is on an output field.
1822 If `comint-use-prompt-regexp-instead-of-fields' is non-nil, then return
1823 the current line with any initial string matching the regexp
1824 `comint-prompt-regexp' removed."
1832 "Insert after prompt old input at point as new input to be edited.
1833 Calls `comint-get-old-input' to get old input."
1843 "Skip past the text matching regexp `comint-prompt-regexp'.
1844 If this takes us past the end of the current line, don't skip at all."
1851 "Return t if point is after the process output marker."
1856 "Default function for sending to PROC input STRING.
1857 This just sends STRING plus a newline. To override this,
1858 set the hook `comint-input-sender'."
1866 "Returns the buffer position of the beginning of the line, after any prompt.
1867 If `comint-use-prompt-regexp-instead-of-fields' is non-nil, then the
1868 prompt skip is done by skipping text matching the regular expression
1869 `comint-prompt-regexp', a buffer local variable."
1871 ;; Use comint-prompt-regexp
1876 ;; Use input fields. Note that, unlike the behavior of
1877 ;; `line-beginning-position' inside a field, this function will
1878 ;; return the position of the end of a prompt, even if the point is
1879 ;; already inside the prompt. In order to do this, it assumes that
1880 ;; if there are two fields on a line, then the first one is the
1881 ;; prompt, and the second one is an input field, and is front-sticky
1882 ;; (as input fields should be).
1886 "Goes to the beginning of line, then skips past the prompt, if any.
1888 If `comint-use-prompt-regexp-instead-of-fields' is non-nil, then the
1889 prompt skip is done by skipping text matching the regular expression
1890 `comint-prompt-regexp', a buffer local variable."
1893 ;; Unlike `beginning-of-line', forward-line ignores field boundaries
1897 ;; These three functions are for entering text you don't want echoed or
1898 ;; saved -- typically passwords to ftp, telnet, or somesuch.
1899 ;; Just enter m-x send-invisible and type in your line, or add
1900 ;; `comint-watch-for-password-prompt' to `comint-output-filter-functions'.
1903 "Read a single line of text from user without echoing, and return it.
1904 Prompt with argument PROMPT, a string. Optional argument STARS causes
1905 input to be echoed with '*' characters on the prompt line. Input ends with
1906 RET, LFD, or ESC. DEL or C-h rubs out. C-u kills line. C-g aborts (if
1907 `inhibit-quit' is set because e.g. this function was called from a process
1908 filter and C-g is pressed, this function returns nil rather than a string).
1910 Note that the keystrokes comprising the text can still be recovered
1912 Once the caller uses the password, it can erase the password
1913 by doing (fillarray STRING 0)."
1925 ;; Use this instead of `read-char' to avoid "Non-character input-event".
1928 ;; This function may get called from a process filter, where
1929 ;; inhibit-quit is set. In later versions of emacs read-char
1930 ;; may clear quit-flag itself and return C-g. That would make
1931 ;; it impossible to quit this loop in a simple way, so
1932 ;; re-enable it here (for backward-compatibility the check for
1933 ;; quit-flag below would still be necessary, so this seems
1934 ;; like the simplest way to do things).
1936 done t))
1950 ;; Emulate a true quit, except that we have to return a value.
1956 ans)))
1959 "Read a string without echoing.
1960 Then send it to the process running in the current buffer.
1961 The string is sent using `comint-input-sender'.
1962 Security bug: your string can still be temporarily recovered with
1978 "Prompt in the minibuffer for password and send without echoing.
1979 This function uses `send-invisible' to read and send a password to the buffer's
1980 process if STRING contains a password prompt defined by
1981 `comint-password-prompt-regexp'.
1983 This function could be in the list `comint-output-filter-functions'."
1987 \f
1988 ;; Low-level process communication
1991 "Like `process-send-string', but also does extra bookkeeping for comint mode."
2001 "Like `process-send-region', but also does extra bookkeeping for comint mode."
2010 \f
2011 ;; Random input hackage
2014 "Delete all output from interpreter since last input.
2015 Does not delete the prompt."
2028 ;; Output message and put back prompt
2034 "Write output from interpreter since last input to FILENAME.
2035 Any prompt at the end of the output is not written.
2037 If the optional argument APPEND (the prefix argument when interactive)
2038 is non-nil, the output is appended to the file instead.
2040 If the optional argument MUSTBENEW is non-nil, check for an existing
2041 file with the same name. If MUSTBENEW is `excl', that means to get an
2042 error if the file already exists; never overwrite. If MUSTBENEW is
2043 neither nil nor `excl', that means ask for confirmation before
2044 overwriting, but do go ahead and overwrite the file if the user
2045 confirms. When interactive, MUSTBENEW is nil when appending, and t
2046 otherwise."
2050 "Append output to file: "
2052 current-prefix-arg
2058 append nil nil mustbenew)))
2060 ;; This function exists for the benefit of the menu; from the keyboard,
2061 ;; users can just use `comint-write-output' with a prefix arg.
2063 "Append output from interpreter since last input to FILENAME.
2064 Any prompt at the end of the output is not written."
2069 "Display start of this batch of interpreter output at top of window.
2070 Sets mark to the value of point when this command is run."
2085 "Interrupt the current subjob.
2086 This command also kills the pending input
2087 between the process-mark and point."
2093 "Send kill signal to the current subjob.
2094 This command also kills the pending input
2095 between the process-mark and point."
2101 "Send quit signal to the current subjob.
2102 This command also kills the pending input
2103 between the process-mark and point."
2109 "Stop the current subjob.
2110 This command also kills the pending input
2111 between the process-mark and point.
2113 WARNING: if there is no current subjob, you can end up suspending
2114 the top-level process running in the buffer. If you accidentally do
2116 is not a problem with most shells, since they ignore this signal.)"
2122 "Send CONT signal to process buffer's process group.
2123 Useful if you accidentally suspend the top-level process."
2128 "Kill all text from last stuff output by interpreter to point."
2135 "Delete ARG characters forward or send an EOF to subprocess.
2136 Sends an EOF only if point is at the end of the buffer and there is no input."
2144 "Send an EOF to the current buffer's process."
2151 "Search backward through buffer for input fields that match REGEXP.
2152 If `comint-use-prompt-regexp-instead-of-fields' is non-nil, then input
2153 fields are identified by lines that match `comint-prompt-regexp'.
2155 With prefix argument N, search for Nth previous match.
2156 If N is negative, find the next or Nth next match."
2159 ;; Use comint-prompt-regexp
2169 ;; Use input fields
2183 "Search forward through buffer for input fields that match REGEXP.
2184 If `comint-use-prompt-regexp-instead-of-fields' is non-nil, then input
2185 fields are identified by lines that match `comint-prompt-regexp'.
2187 With prefix argument N, search for Nth following match.
2188 If N is negative, find the previous or Nth previous match."
2194 "Move to end of Nth next prompt in the buffer.
2195 If `comint-use-prompt-regexp-instead-of-fields' is nil, then this means
2196 the beginning of the Nth next `input' field, otherwise, it means the Nth
2197 occurance of text matching `comint-prompt-regexp'."
2200 ;; Use comint-prompt-regexp
2205 ;; Use input fields
2208 prev-pos)
2216 ;; Ran off the end of the buffer.
2218 ;; There's always an input field at the end of the
2219 ;; buffer, but it has a `field' property of nil.
2221 ;; stop iterating
2231 "Move to end of Nth previous prompt in the buffer.
2232 If `comint-use-prompt-regexp-instead-of-fields' is nil, then this means
2233 the beginning of the Nth previous `input' field, otherwise, it means the Nth
2234 occurance of text matching `comint-prompt-regexp'."
2238 ;; State used by `comint-insert-previous-argument' when cycling.
2244 ;; Needs fixing:
2245 ;; make comint-arguments understand negative indices as bash does
2247 "Insert the INDEXth argument from the previous comint command-line at point.
2248 Spaces are added at beginning and/or end of the inserted string if
2249 necessary to ensure that it's separated from adjacent arguments.
2250 Interactively, if no prefix argument is given, the last argument is inserted.
2251 Repeated interactive invocations will cycle through the same argument
2252 from progressively earlier commands (using the value of INDEX specified
2253 with the first command).
2254 This command is like `M-.' in bash."
2259 ;; Delete last input inserted by this command.
2263 ;; This is a non-repeat invocation, so initialize state.
2267 ;; First usage; initialize to a marker
2270 ;; Make sure we're not in the prompt, and add a beginning space if necess.
2274 ;; Remember the beginning of what we insert, so we can delete it if
2275 ;; the command is repeated.
2277 ;; Insert the argument.
2280 ;; strip terminating '&'
2283 ;; Make next invocation return arg from previous input
2285 ;; Add a terminating space if necessary.
2289 \f
2290 ;; Support for source-file processing commands.
2291 ;;============================================================================
2292 ;; Many command-interpreters (e.g., Lisp, Scheme, Soar) have
2293 ;; commands that process files of source text (e.g. loading or compiling
2294 ;; files). So the corresponding process-in-a-buffer modes have commands
2295 ;; for doing this (e.g., lisp-load-file). The functions below are useful
2296 ;; for defining these commands.
2297 ;;
2298 ;; Alas, these guys don't do exactly the right thing for Lisp, Scheme
2299 ;; and Soar, in that they don't know anything about file extensions.
2300 ;; So the compile/load interface gets the wrong default occasionally.
2301 ;; The load-file/compile-file default mechanism could be smarter -- it
2302 ;; doesn't know about the relationship between filename extensions and
2303 ;; whether the file is source or executable. If you compile foo.lisp
2304 ;; with compile-file, then the next load-file should use foo.bin for
2305 ;; the default, not foo.lisp. This is tricky to do right, particularly
2306 ;; because the extension for executable files varies so much (.o, .bin,
2307 ;; .lbin, .mo, .vo, .ao, ...).
2310 ;; COMINT-SOURCE-DEFAULT -- determines defaults for source-file processing
2311 ;; commands.
2312 ;;
2313 ;; COMINT-CHECK-SOURCE -- if FNAME is in a modified buffer, asks you if you
2314 ;; want to save the buffer before issuing any process requests to the command
2315 ;; interpreter.
2316 ;;
2317 ;; COMINT-GET-SOURCE -- used by the source-file processing commands to prompt
2318 ;; for the file to process.
2320 ;; (COMINT-SOURCE-DEFAULT previous-dir/file source-modes)
2321 ;;============================================================================
2322 ;; This function computes the defaults for the load-file and compile-file
2323 ;; commands for tea, soar, cmulisp, and cmuscheme modes.
2324 ;;
2325 ;; - PREVIOUS-DIR/FILE is a pair (directory . filename) from the last
2326 ;; source-file processing command. nil if there hasn't been one yet.
2327 ;; - SOURCE-MODES is a list used to determine what buffers contain source
2328 ;; files: if the major mode of the buffer is in SOURCE-MODES, it's source.
2329 ;; Typically, (lisp-mode) or (scheme-mode).
2330 ;;
2331 ;; If the command is given while the cursor is inside a string, *and*
2332 ;; the string is an existing filename, *and* the filename is not a directory,
2333 ;; then the string is taken as default. This allows you to just position
2334 ;; your cursor over a string that's a filename and have it taken as default.
2335 ;;
2336 ;; If the command is given in a file buffer whose major mode is in
2337 ;; SOURCE-MODES, then the filename is the default file, and the
2338 ;; file's directory is the default directory.
2339 ;;
2340 ;; If the buffer isn't a source file buffer (e.g., it's the process buffer),
2341 ;; then the default directory & file are what was used in the last source-file
2342 ;; processing command (i.e., PREVIOUS-DIR/FILE). If this is the first time
2343 ;; the command has been run (PREVIOUS-DIR/FILE is nil), the default directory
2344 ;; is the cwd, with no default file. (\"no default file\" = nil)
2345 ;;
2346 ;; SOURCE-REGEXP is typically going to be something like (tea-mode)
2347 ;; for T programs, (lisp-mode) for Lisp programs, (soar-mode lisp-mode)
2348 ;; for Soar programs, etc.
2349 ;;
2350 ;; The function returns a pair: (default-directory . default-file).
2361 ;; (COMINT-CHECK-SOURCE fname)
2362 ;;============================================================================
2363 ;; Prior to loading or compiling (or otherwise processing) a file (in the CMU
2364 ;; process-in-a-buffer modes), this function can be called on the filename.
2365 ;; If the file is loaded into a buffer, and the buffer is modified, the user
2366 ;; is queried to see if he wants to save the buffer before proceeding with
2367 ;; the load or compile.
2374 ;; save BUFF.
2381 ;; (COMINT-GET-SOURCE prompt prev-dir/file source-modes mustmatch-p)
2382 ;;============================================================================
2383 ;; COMINT-GET-SOURCE is used to prompt for filenames in command-interpreter
2384 ;; commands that process source files (like loading or compiling a file).
2385 ;; It prompts for the filename, provides a default, if there is one,
2386 ;; and returns the result filename.
2387 ;;
2388 ;; See COMINT-SOURCE-DEFAULT for more on determining defaults.
2389 ;;
2390 ;; PROMPT is the prompt string. PREV-DIR/FILE is the (directory . file) pair
2391 ;; from the last source processing command. SOURCE-MODES is a list of major
2392 ;; modes used to determine what file buffers contain source files. (These
2393 ;; two arguments are used for determining defaults). If MUSTMATCH-P is true,
2394 ;; then the filename reader will only accept a file that exists.
2395 ;;
2396 ;; A typical use:
2397 ;; (interactive (comint-get-source "Compile file: " prev-lisp-dir/file
2398 ;; '(lisp-mode) t))
2400 ;; This is pretty stupid about strings. It decides we're in a string
2401 ;; if there's a quote on both sides of point on the current line.
2403 "Return string around POINT that starts the current line, or nil."
2430 prompt deffile)
2431 prompt)
2432 defdir
2434 mustmatch-p)))
2437 ;; I am somewhat divided on this string-default feature. It seems
2438 ;; to violate the principle-of-least-astonishment, in that it makes
2439 ;; the default harder to predict, so you actually have to look and see
2440 ;; what the default really is before choosing it. This can trip you up.
2441 ;; On the other hand, it can be useful, I guess. I would appreciate feedback
2442 ;; on this.
2443 ;; -Olin
2445 \f
2446 ;; Simple process query facility.
2447 ;; ===========================================================================
2448 ;; This function is for commands that want to send a query to the process
2449 ;; and show the response to the user. For example, a command to get the
2450 ;; arglist for a Common Lisp function might send a "(arglist 'foo)" query
2451 ;; to an inferior Common Lisp process.
2452 ;;
2453 ;; This simple facility just sends strings to the inferior process and pops
2454 ;; up a window for the process buffer so you can see what the process
2455 ;; responds with. We don't do anything fancy like try to intercept what the
2456 ;; process responds with and put it in a pop-up window or on the message
2457 ;; line. We just display the buffer. Low tech. Simple. Works good.
2459 ;; Send to the inferior process PROC the string STR. Pop-up but do not select
2460 ;; a window for the inferior process so that its response can be seen.
2470 ;; Try to position the proc window so you can see the answer.
2471 ;; This is bogus code. If you delete the (sit-for 0), it breaks.
2472 ;; I don't know why. Wizards invited to improve it.
2481 \f
2482 ;; Filename/command/history completion in a buffer
2483 ;; ===========================================================================
2484 ;; Useful completion functions, courtesy of the Ergo group.
2486 ;; Six commands:
2487 ;; comint-dynamic-complete Complete or expand command, filename,
2488 ;; history at point.
2489 ;; comint-dynamic-complete-filename Complete filename at point.
2490 ;; comint-dynamic-list-filename-completions List completions in help buffer.
2491 ;; comint-replace-by-expanded-filename Expand and complete filename at point;
2492 ;; replace with expanded/completed name.
2493 ;; comint-dynamic-simple-complete Complete stub given candidates.
2495 ;; These are not installed in the comint-mode keymap. But they are
2496 ;; available for people who want them. Shell-mode installs them:
2497 ;; (define-key shell-mode-map "\t" 'comint-dynamic-complete)
2498 ;; (define-key shell-mode-map "\M-?"
2499 ;; 'comint-dynamic-list-filename-completions)))
2500 ;;
2501 ;; Commands like this are fine things to put in load hooks if you
2502 ;; want them present in specific modes.
2505 "*If non-nil, automatically list possibilities on partial completion.
2506 This mirrors the optional behavior of tcsh."
2511 "*If non-nil, add a `/' to completed directories, ` ' to file names.
2512 If a cons pair, it should be of the form (DIRSUFFIX . FILESUFFIX) where
2513 DIRSUFFIX and FILESUFFIX are strings added on unambiguous or exact completion.
2514 This mirrors the optional behavior of tcsh."
2523 "*If non-nil, use shortest completion if characters cannot be added.
2524 This mirrors the optional behavior of tcsh.
2526 A non-nil value is useful if `comint-completion-autolist' is non-nil too."
2531 "*List of suffixes to be disregarded during file completion.
2532 This mirrors the optional behavior of bash and tcsh.
2534 Note that this applies to `comint-dynamic-complete-filename' only."
2539 "Prefix prepended to absolute file names taken from process input.
2540 This is used by comint's and shell's completion functions, and by shell's
2545 "~/A-Za-z0-9_^$!#%&{}@`'.,:()-"
2547 "String of characters valid in a file name.
2548 Note that all non-ASCII characters are considered valid in a file name
2549 regardless of what this variable says.
2560 ;; Return expanded DIRECTORY, with `comint-file-name-prefix' if absolute.
2563 directory)))
2567 "Return the word of WORD-CHARS at point, or nil if non is found.
2568 Word constituents are considered to be those in WORD-CHARS, which is like the
2570 plus all non-ASCII characters."
2574 ;;(memq (char-after (point)) shell-file-name-quote-list)
2578 ;; Don't go forward over a word-char (this can happen if we're at bob).
2581 ;; Set match-data to match the entire string.
2587 "Return FILENAME with environment variables substituted.
2588 Supports additional environment variable syntax of the command
2589 interpreter (e.g., the percent notation of cmd.exe on NT)."
2593 env-var-val)
2602 name))
2605 "Return the filename at point, or nil if non is found.
2606 Environment variables are substituted. See `comint-word'."
2613 "Return FILENAME with magic characters quoted.
2614 Magic characters are those in `comint-file-name-quote-list'."
2616 filename
2623 filename))))
2626 "Return FILENAME with quoted characters unquoted."
2628 filename
2634 filename)))
2638 "Dynamically perform completion at point.
2639 Calls the functions in `comint-dynamic-complete-functions' to perform
2640 completion until a function returns non-nil, at which point completion is
2641 assumed to have occurred."
2647 "Dynamically complete the filename at point.
2648 Completes if after a filename. See `comint-match-partial-filename' and
2649 `comint-dynamic-complete-as-filename'.
2650 This function is similar to `comint-replace-by-expanded-filename', except that
2651 it won't change parts of the filename already entered in the buffer; it just
2652 adds completion characters to the end of the filename. A completions listing
2653 may be shown in a help buffer if completion is ambiguous.
2655 Completion is dependent on the value of `comint-completion-addsuffix',
2656 `comint-completion-recexact' and `comint-completion-fignore', and the timing of
2657 completions listing is dependent on the value of `comint-completion-autolist'.
2659 Returns t if successful."
2667 "Dynamically complete at point as a filename.
2668 See `comint-dynamic-complete-filename'. Returns t if successful."
2671 ;; If we bind this, it breaks remote directory tracking in rlogin.el.
2672 ;; I think it was originally bound to solve file completion problems,
2673 ;; but subsequent changes may have made this unnecessary. sm.
2674 ;;(file-name-handler-alist nil)
2709 ;; We inserted a unique completion.
2716 ;; It's not unique, but user wants shortest match.
2722 ;; It's not unique, list possible completions.
2727 success))
2731 "Dynamically expand and complete the filename at point.
2732 Replace the filename with an expanded, canonicalised and completed replacement.
2735 removed, and the filename is made absolute instead of relative. For expansion
2736 see `expand-file-name' and `substitute-in-file-name'. For completion see
2737 `comint-dynamic-complete-filename'."
2746 "Dynamically complete STUB from CANDIDATES list.
2747 This function inserts completion characters at point by completing STUB from
2748 the strings in CANDIDATES. A completions listing may be shown in a help buffer
2749 if completion is ambiguous.
2751 Returns nil if no completion was inserted.
2752 Returns `sole' if completed with the only completion match.
2753 Returns `shortest' if completed with the shortest of the completion matches.
2754 Returns `partial' if completed as far as possible with the completion matches.
2755 Returns `listed' if a completion listing was shown.
2757 See also `comint-dynamic-complete-filename'."
2766 nil)
2777 ;; Insert the longest substring.
2782 ;; It's not unique, but user wants shortest match.
2788 ;; It's not unique, list possible completions.
2797 "List in help buffer possible completions of the filename at point."
2800 ;; If we bind this, it breaks remote directory tracking in rlogin.el.
2801 ;; I think it was originally bound to solve file completion problems,
2802 ;; but subsequent changes may have made this unnecessary. sm.
2803 ;;(file-name-handler-alist nil)
2816 "List in help buffer sorted COMPLETIONS.
2817 Typing SPC flushes the help buffer."
2822 ;; If this command was repeated, and
2823 ;; there's a fresh completion window with a live buffer,
2824 ;; and this command is repeated, scroll that window.
2845 ;; If the user does mouse-choose-completion with the mouse,
2846 ;; execute the command, then delete the completion window.
2854 \f
2856 "After fetching a line from input history, this fetches the following line.
2857 In other words, this recalls the input line after the line you recalled last.
2858 You can use this to repeat a sequence of input lines."
2867 "Accumulate a line to send as input along with more lines.
2868 This inserts a newline so that you can enter more text
2870 to send all the accumulated input, at once.
2871 The entire accumulated text becomes one item in the input history
2872 when you send it."
2881 "Move point to the process mark.
2882 The process mark separates output, and input already sent,
2883 from input that has not yet been sent."
2892 "Move point to beginning of line (after prompt) or to the process mark.
2893 The first time you use this command, it moves to the beginning of the line
2894 \(but after the prompt, if any). If you repeat it again immediately,
2895 it moves point to the process mark.
2897 The process mark separates the process output, along with input already sent,
2898 from input that has not yet been sent. Ordinarily, the process mark
2899 is at the beginning of the current input line; but if you have
2901 the process mark is at the beginning of the accumulated input."
2908 "Set the process mark at point."
2915 \f
2916 ;; Author: Peter Breton <pbreton@cs.umb.edu>
2918 ;; This little add-on for comint is intended to make it easy to get
2919 ;; output from currently active comint buffers into another buffer,
2920 ;; or buffers, and then go back to using the comint shell.
2921 ;;
2922 ;; My particular use is SQL interpreters; I want to be able to execute a
2923 ;; query using the process associated with a comint-buffer, and save that
2924 ;; somewhere else. Because the process might have state (for example, it
2925 ;; could be in an uncommitted transaction), just running starting a new
2926 ;; process and having it execute the query and then finish, would not
2927 ;; work. I'm sure there are other uses as well, although in many cases
2928 ;; starting a new process is the simpler, and thus preferable, approach.
2929 ;;
2930 ;; The basic implementation is as follows: comint-redirect changes the
2931 ;; preoutput filter functions (comint-preoutput-filter-functions) to use
2932 ;; its own filter. The filter puts the output into the designated buffer,
2933 ;; or buffers, until it sees a regexp that tells it to stop (by default,
2934 ;; this is the prompt for the interpreter, comint-prompt-regexp). When it
2935 ;; sees the stop regexp, it restores the old filter functions, and runs
2936 ;; comint-redirect-hook.
2937 ;;
2938 ;; Each comint buffer may only use one redirection at a time, but any number
2939 ;; of different comint buffers may be simultaneously redirected.
2940 ;;
2941 ;; NOTE: It is EXTREMELY important that `comint-prompt-regexp' be set to the
2942 ;; correct prompt for your interpreter, or that you supply a regexp that says
2943 ;; when the redirection is finished. Otherwise, redirection will continue
2944 ;; indefinitely. The code now does a sanity check to ensure that it can find
2945 ;; a prompt in the comint buffer; however, it is still important to ensure that
2946 ;; this prompt is set correctly.
2947 ;;
2948 ;; XXX: This doesn't work so well unless comint-prompt-regexp is set;
2949 ;; perhaps it should prompt for a terminating string (with an
2950 ;; appropriate magic default by examining what we think is the prompt)?
2951 ;;
2953 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2954 ;; Variables
2955 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2958 "*If non-nil, print messages each time the redirection filter is invoked.
2959 Also print a message when redirection is completed."
2963 ;; Directly analagous to comint-preoutput-filter-functions
2965 "List of functions to call before inserting redirected process output.
2966 Each function gets one argument, a string containing the text received
2967 from the subprocess. It should return the string to insert, perhaps
2968 the same string that was received, or perhaps a modified or transformed
2969 string.
2971 The functions on the list are called sequentially, and each one is given
2972 the string returned by the previous one. The string returned by the
2973 last function is the text that is actually inserted in the redirection buffer.
2975 You can use `add-hook' to add functions to this list
2978 ;; Internal variables
2984 "Regular expression that determines when to stop redirection in Comint.
2985 When the redirection filter function is given output that matches this regexp,
2989 "If non-nil, the text that ends a redirection is included in it.
2990 More precisely, the text that matches `comint-redirect-finished-regexp'
2991 and therefore terminates an output redirection is inserted in the
3004 "If non-nil, check that redirection is likely to complete successfully.
3005 More precisely, before starting a redirection, verify that the
3006 regular expression `comint-redirect-finished-regexp' that controls
3007 when to terminate it actually matches some text already in the process
3008 buffer. The idea is that this regular expression should match a prompt
3009 string, and that there ought to be at least one copy of your prompt string
3013 "The process filter that was in place when redirection is started.
3014 When redirection is completed, the process filter is restored to
3017 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3018 ;; Functions
3019 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3022 comint-buffer
3023 finished-regexp
3025 "Set up for output redirection.
3026 This function sets local variables that are used by `comint-redirect-filter'
3027 to perform redirection.
3029 Output from COMINT-BUFFER is redirected to OUTPUT-BUFFER, until something
3030 in the output matches FINISHED-REGEXP.
3032 If optional argument ECHO-INPUT is non-nil, output is echoed to the
3033 original comint buffer.
3035 This function is called by `comint-redirect-send-command-to-process',
3036 and does not normally need to be invoked by the end user or programmer."
3060 "End a Comint redirection. See `comint-redirect-send-command'."
3062 ;; Restore the process filter
3064 comint-redirect-original-filter-function)
3065 ;; Restore the mode line
3067 ;; Set the completed flag
3070 ;; Because the cleanup happens as a callback, it's not easy to guarantee
3071 ;; that it really occurs.
3075 "Filter function which redirects output from PROCESS to a buffer or buffers.
3076 The variable `comint-redirect-output-buffer' says which buffer(s) to
3077 place output in.
3079 INPUT-STRING is the input from the comint process.
3081 This function runs as a process filter, and does not need to be invoked by the
3082 end user."
3086 ;; If we have to echo output, give it to the original filter function
3088 comint-redirect-original-filter-function
3090 process input-string)))))
3094 "Comint filter function which redirects comint output to a buffer or buffers.
3095 The variable `comint-redirect-output-buffer' says which buffer(s) to
3096 place output in.
3098 INPUT-STRING is the input from the comint process.
3100 This function does not need to be invoked by the end user."
3103 comint-redirect-output-buffer
3107 ;; If there are any filter functions, give them a chance to modify the string
3111 ;; If a local value says "use the default value too",
3112 ;; do that.
3122 ;; Clobber `comint-redirect-finished-regexp'
3128 ;; Send output to all registered buffers
3132 ;; Set this buffer to the output buffer
3134 ;; Go to the end of the buffer
3136 ;; Insert the output
3138 output-buffer-list))
3140 ;; Message
3145 ;; If we see the prompt, tidy up
3146 ;; We'll look for the prompt in the original string, so nobody can
3147 ;; clobber it
3154 ;; Echo input?
3156 filtered-input-string
3159 ;;;###autoload
3161 "Send COMMAND to process in current buffer, with output to OUTPUT-BUFFER.
3162 With prefix arg, echo output in process buffer.
3164 If NO-DISPLAY is non-nil, do not show the output buffer."
3172 ;;;###autoload
3175 "Send COMMAND to PROCESS, with output to OUTPUT-BUFFER.
3176 With prefix arg, echo output in process buffer.
3178 If NO-DISPLAY is non-nil, do not show the output buffer."
3183 process))
3185 ;; Change to the process buffer
3188 ;; Make sure there's a prompt in the current process buffer
3195 ;;;;;;;;;;;;;;;;;;;;;
3196 ;; Set up for redirection
3197 ;;;;;;;;;;;;;;;;;;;;;
3199 ;; Output Buffer
3200 output-buffer
3201 ;; Comint Buffer
3203 ;; Finished Regexp
3204 comint-prompt-regexp
3205 ;; Echo input
3206 echo)
3208 ;;;;;;;;;;;;;;;;;;;;;
3209 ;; Set the filter
3210 ;;;;;;;;;;;;;;;;;;;;;
3211 ;; Save the old filter
3216 ;;;;;;;;;;;;;;;;;;;;;
3217 ;; Send the command
3218 ;;;;;;;;;;;;;;;;;;;;;
3223 ;;;;;;;;;;;;;;;;;;;;;
3224 ;; Show the output
3225 ;;;;;;;;;;;;;;;;;;;;;
3231 output-buffer)))))))
3233 ;;;###autoload
3235 "Send COMMAND to current process.
3236 Return a list of expressions in the output which match REGEXP.
3237 REGEXP-GROUP is the regular expression group in REGEXP to use."
3240 command regexp regexp-group))
3242 ;;;###autoload
3244 "Send COMMAND to PROCESS.
3245 Return a list of expressions in the output which match REGEXP.
3246 REGEXP-GROUP is the regular expression group in REGEXP to use."
3248 results)
3253 output-buffer process nil t)
3254 ;; Wait for the process to complete
3258 ;; Collect the output
3261 ;; Skip past the command, if it was echoed
3269 results)))
3270 results)))
3275 "^Empty input ring$"
3276 "^No history$"
3280 \f
3281 ;; Converting process modes to use comint mode
3282 ;; ===========================================================================
3283 ;; The code in the Emacs 19 distribution has all been modified to use comint
3284 ;; where needed. However, there are `third-party' packages out there that
3285 ;; still use the old shell mode. Here's a guide to conversion.
3286 ;;
3287 ;; Renaming variables
3288 ;; Most of the work is renaming variables and functions. These are the common
3289 ;; ones:
3290 ;; Local variables:
3291 ;; last-input-start comint-last-input-start
3292 ;; last-input-end comint-last-input-end
3293 ;; shell-prompt-pattern comint-prompt-regexp
3294 ;; shell-set-directory-error-hook <no equivalent>
3295 ;; Miscellaneous:
3296 ;; shell-set-directory <unnecessary>
3297 ;; shell-mode-map comint-mode-map
3298 ;; Commands:
3299 ;; shell-send-input comint-send-input
3300 ;; shell-send-eof comint-delchar-or-maybe-eof
3301 ;; kill-shell-input comint-kill-input
3302 ;; interrupt-shell-subjob comint-interrupt-subjob
3303 ;; stop-shell-subjob comint-stop-subjob
3304 ;; quit-shell-subjob comint-quit-subjob
3305 ;; kill-shell-subjob comint-kill-subjob
3306 ;; kill-output-from-shell comint-delete-output
3307 ;; show-output-from-shell comint-show-output
3308 ;; copy-last-shell-input Use comint-previous-input/comint-next-input
3309 ;;
3310 ;; SHELL-SET-DIRECTORY is gone, its functionality taken over by
3311 ;; SHELL-DIRECTORY-TRACKER, the shell mode's comint-input-filter-functions.
3312 ;; Comint mode does not provide functionality equivalent to
3313 ;; shell-set-directory-error-hook; it is gone.
3314 ;;
3315 ;; comint-last-input-start is provided for modes which want to munge
3316 ;; the buffer after input is sent, perhaps because the inferior
3317 ;; insists on echoing the input. The LAST-INPUT-START variable in
3318 ;; the old shell package was used to implement a history mechanism,
3319 ;; but you should think twice before using comint-last-input-start
3320 ;; for this; the input history ring often does the job better.
3321 ;;
3322 ;; If you are implementing some process-in-a-buffer mode, called foo-mode, do
3323 ;; *not* create the comint-mode local variables in your foo-mode function.
3324 ;; This is not modular. Instead, call comint-mode, and let *it* create the
3325 ;; necessary comint-specific local variables. Then create the
3326 ;; foo-mode-specific local variables in foo-mode. Set the buffer's keymap to
3327 ;; be foo-mode-map, and its mode to be foo-mode. Set the comint-mode hooks
3328 ;; (comint-{prompt-regexp, input-filter, input-filter-functions,
3329 ;; get-old-input) that need to be different from the defaults. Call
3330 ;; foo-mode-hook, and you're done. Don't run the comint-mode hook yourself;
3331 ;; comint-mode will take care of it. The following example, from shell.el,
3332 ;; is typical:
3333 ;;
3334 ;; (defvar shell-mode-map '())
3335 ;; (cond ((not shell-mode-map)
3336 ;; (setq shell-mode-map (copy-keymap comint-mode-map))
3337 ;; (define-key shell-mode-map "\C-c\C-f" 'shell-forward-command)
3338 ;; (define-key shell-mode-map "\C-c\C-b" 'shell-backward-command)
3339 ;; (define-key shell-mode-map "\t" 'comint-dynamic-complete)
3340 ;; (define-key shell-mode-map "\M-?"
3341 ;; 'comint-dynamic-list-filename-completions)))
3342 ;;
3343 ;; (defun shell-mode ()
3344 ;; (interactive)
3345 ;; (comint-mode)
3346 ;; (setq comint-prompt-regexp shell-prompt-pattern)
3347 ;; (setq major-mode 'shell-mode)
3348 ;; (setq mode-name "Shell")
3349 ;; (use-local-map shell-mode-map)
3350 ;; (make-local-variable 'shell-directory-stack)
3351 ;; (setq shell-directory-stack nil)
3352 ;; (add-hook 'comint-input-filter-functions 'shell-directory-tracker)
3353 ;; (run-hooks 'shell-mode-hook))
3354 ;;
3355 ;;
3356 ;; Completion for comint-mode users
3357 ;;
3358 ;; For modes that use comint-mode, comint-dynamic-complete-functions is the
3359 ;; hook to add completion functions to. Functions on this list should return
3360 ;; non-nil if completion occurs (i.e., further completion should not occur).
3361 ;; You could use comint-dynamic-simple-complete to do the bulk of the
3362 ;; completion job.
3363 \f
3367 ;;; comint.el ends here