1 ;;; minibuf.el --- Minibuffer functions for XEmacs
3 ;; Copyright (C) 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
4 ;; Copyright (C) 1995 Tinker Systems
5 ;; Copyright (C) 1995, 1996 Ben Wing
7 ;; Author: Richard Mlynarik
9 ;; Maintainer: XEmacs Development Team
10 ;; Keywords: internal, dumped
12 ;; This file is part of XEmacs.
14 ;; XEmacs is free software; you can redistribute it and/or modify it
15 ;; under the terms of the GNU General Public License as published by
16 ;; the Free Software Foundation; either version 2, or (at your option)
19 ;; XEmacs is distributed in the hope that it will be useful, but
20 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 ;; General Public License for more details.
24 ;; You should have received a copy of the GNU General Public License
25 ;; along with XEmacs; see the file COPYING. If not, write to the
26 ;; Free Software Foundation, 59 Temple Place - Suite 330,
27 ;; Boston, MA 02111-1307, USA.
29 ;;; Synched up with: all the minibuffer history stuff is synched with
30 ;;; 19.30. Not sure about the rest.
34 ;; This file is dumped with XEmacs.
36 ;; Written by Richard Mlynarik 2-Oct-92
38 ;; 06/11/1997 - Use char-(after|before) instead of
39 ;; (following|preceding)-char. -slb
43 (defgroup minibuffer nil
44 "Controling the behavior of the minibuffer."
48 (defcustom insert-default-directory t
49 "*Non-nil means when reading a filename start with default dir in minibuffer."
53 (defcustom minibuffer-history-uniquify t
54 "*Non-nil means when adding an item to a minibuffer history, remove
55 previous occurances of the same item from the history list first,
56 rather than just consing the new element onto the front of the list."
60 (defvar minibuffer-completion-table nil
61 "Alist or obarray used for completion in the minibuffer.
62 This becomes the ALIST argument to `try-completion' and `all-completions'.
64 The value may alternatively be a function, which is given three arguments:
65 STRING, the current buffer contents;
66 PREDICATE, the predicate for filtering possible matches;
67 CODE, which says what kind of things to do.
68 CODE can be nil, t or `lambda'.
69 nil means to return the best completion of STRING, nil if there is none,
70 or t if it is already a unique completion.
71 t means to return a list of all possible completions of STRING.
72 `lambda' means to return t if STRING is a valid completion as it stands.")
74 (defvar minibuffer-completion-predicate nil
75 "Within call to `completing-read', this holds the PREDICATE argument.")
77 (defvar minibuffer-completion-confirm nil
78 "Non-nil => demand confirmation of completion before exiting minibuffer.")
80 (defvar minibuffer-confirm-incomplete nil
81 "If true, then in contexts where completing-read allows answers which
82 are not valid completions, an extra RET must be typed to confirm the
83 response. This is helpful for catching typos, etc.")
85 (defcustom completion-auto-help t
86 "*Non-nil means automatically provide help for invalid completion input."
90 (defcustom enable-recursive-minibuffers nil
91 "*Non-nil means to allow minibuffer commands while in the minibuffer.
92 More precisely, this variable makes a difference when the minibuffer window
93 is the selected window. If you are in some other window, minibuffer commands
94 are allowed even if a minibuffer is active."
98 (defcustom minibuffer-max-depth 1
99 ;; See comment in #'minibuffer-max-depth-exceeded
100 "*Global maximum number of minibuffers allowed;
101 compare to enable-recursive-minibuffers, which is only consulted when the
102 minibuffer is reinvoked while it is the selected window."
103 :type '(choice integer
104 (const :tag "Indefinite" nil))
107 ;; Moved to C. The minibuffer prompt must be setup before this is run
108 ;; and that can only be done from the C side.
109 ;(defvar minibuffer-setup-hook nil
110 ; "Normal hook run just after entry to minibuffer.")
112 (defvar minibuffer-exit-hook nil
113 "Normal hook run just after exit from minibuffer.")
115 (defvar minibuffer-help-form nil
116 "Value that `help-form' takes on inside the minibuffer.")
118 (defvar minibuffer-default nil
119 "Default value for minibuffer input.")
121 (defvar minibuffer-local-map
122 (let ((map (make-sparse-keymap 'minibuffer-local-map)))
124 "Default keymap to use when reading from the minibuffer.")
126 (defvar minibuffer-local-completion-map
127 (let ((map (make-sparse-keymap 'minibuffer-local-completion-map)))
128 (set-keymap-parents map (list minibuffer-local-map))
130 "Local keymap for minibuffer input with completion.")
132 (defvar minibuffer-local-must-match-map
133 (let ((map (make-sparse-keymap 'minibuffer-must-match-map)))
134 (set-keymap-parents map (list minibuffer-local-completion-map))
136 "Local keymap for minibuffer input with completion, for exact match.")
138 ;; (define-key minibuffer-local-map "\C-g" 'abort-recursive-edit)
139 (define-key minibuffer-local-map "\C-g" 'minibuffer-keyboard-quit) ;; moved here from pending-del.el
140 (define-key minibuffer-local-map "\r" 'exit-minibuffer)
141 (define-key minibuffer-local-map "\n" 'exit-minibuffer)
143 ;; Historical crock. Unused by anything but user code, if even that
144 ;(defvar minibuffer-local-ns-map
145 ; (let ((map (make-sparse-keymap 'minibuffer-local-ns-map)))
146 ; (set-keymap-parents map (list minibuffer-local-map))
148 ; "Local keymap for the minibuffer when spaces are not allowed.")
149 ;(define-key minibuffer-local-ns-map [space] 'exit-minibuffer)
150 ;(define-key minibuffer-local-ns-map [tab] 'exit-minibuffer)
151 ;(define-key minibuffer-local-ns-map [?\?] 'self-insert-and-exit)
153 (define-key minibuffer-local-completion-map "\t" 'minibuffer-complete)
154 (define-key minibuffer-local-completion-map " " 'minibuffer-complete-word)
155 (define-key minibuffer-local-completion-map "?" 'minibuffer-completion-help)
156 (define-key minibuffer-local-must-match-map "\r" 'minibuffer-complete-and-exit)
157 (define-key minibuffer-local-must-match-map "\n" 'minibuffer-complete-and-exit)
159 (define-key minibuffer-local-map "\M-n" 'next-history-element)
160 (define-key minibuffer-local-map "\M-p" 'previous-history-element)
161 (define-key minibuffer-local-map '[next] "\M-n")
162 (define-key minibuffer-local-map '[prior] "\M-p")
163 (define-key minibuffer-local-map "\M-r" 'previous-matching-history-element)
164 (define-key minibuffer-local-map "\M-s" 'next-matching-history-element)
165 (define-key minibuffer-local-must-match-map [next]
166 'next-complete-history-element)
167 (define-key minibuffer-local-must-match-map [prior]
168 'previous-complete-history-element)
170 ;; This is an experiment--make up and down arrows do history.
171 (define-key minibuffer-local-map [up] 'previous-history-element)
172 (define-key minibuffer-local-map [down] 'next-history-element)
173 (define-key minibuffer-local-completion-map [up] 'previous-history-element)
174 (define-key minibuffer-local-completion-map [down] 'next-history-element)
175 (define-key minibuffer-local-must-match-map [up] 'previous-history-element)
176 (define-key minibuffer-local-must-match-map [down] 'next-history-element)
178 (defvar read-expression-map (let ((map (make-sparse-keymap
179 'read-expression-map)))
180 (set-keymap-parents map
181 (list minibuffer-local-map))
182 (define-key map "\M-\t" 'lisp-complete-symbol)
184 "Minibuffer keymap used for reading Lisp expressions.")
186 (defvar read-shell-command-map
187 (let ((map (make-sparse-keymap 'read-shell-command-map)))
188 (set-keymap-parents map (list minibuffer-local-map))
189 (define-key map "\t" 'comint-dynamic-complete)
190 (define-key map "\M-\t" 'comint-dynamic-complete)
191 (define-key map "\M-?" 'comint-dynamic-list-completions)
193 "Minibuffer keymap used by shell-command and related commands.")
195 (defcustom use-dialog-box t
196 "*Variable controlling usage of the dialog box.
197 If nil, the dialog box will never be used, even in response to mouse events."
201 (defcustom minibuffer-electric-file-name-behavior t
202 "*If non-nil, slash and tilde in certain places cause immediate deletion.
203 These are the same places where this behavior would occur later on anyway,
204 in `substitute-in-file-name'."
208 ;; originally by Stig@hackvan.com
209 (defun minibuffer-electric-separator ()
211 (let ((c last-command-char))
212 (and minibuffer-electric-file-name-behavior
213 (eq c directory-sep-char)
214 (eq c (char-before (point)))
216 (goto-char (point-min))
217 (and (looking-at "/.+:~?[^/]*/.+")
218 (re-search-forward "^/.+:~?[^/]*" nil t)
220 (delete-region (point) (point-max))
223 (goto-char (point-min))
224 (and (looking-at ".+://[^/]*/.+")
225 (re-search-forward "^.+:/" nil t)
227 (delete-region (point) (point-max))
229 ;; permit `//hostname/path/to/file'
230 (not (eq (point) (1+ (point-min))))
231 ;; permit `http://url/goes/here'
232 (or (not (eq ?: (char-after (- (point) 2))))
233 (eq ?/ (char-after (point-min))))
234 (delete-region (point-min) (point)))
237 (defun minibuffer-electric-tilde ()
239 (and minibuffer-electric-file-name-behavior
240 (eq directory-sep-char (char-before (point)))
241 ;; permit URL's with //, for e.g. http://hostname/~user
242 (not (save-excursion (search-backward "//" nil t)))
243 (delete-region (point-min) (point)))
247 (defvar read-file-name-map
248 (let ((map (make-sparse-keymap 'read-file-name-map)))
249 (set-keymap-parents map (list minibuffer-local-completion-map))
250 (define-key map (vector directory-sep-char) 'minibuffer-electric-separator)
251 (define-key map "~" 'minibuffer-electric-tilde)
255 (defvar read-file-name-must-match-map
256 (let ((map (make-sparse-keymap 'read-file-name-map)))
257 (set-keymap-parents map (list minibuffer-local-must-match-map))
258 (define-key map (vector directory-sep-char) 'minibuffer-electric-separator)
259 (define-key map "~" 'minibuffer-electric-tilde)
263 (defun minibuffer-keyboard-quit ()
264 "Abort recursive edit.
265 If `zmacs-regions' is true, and the zmacs region is active in this buffer,
266 then this key deactivates the region without beeping."
268 (if (and (region-active-p)
269 (eq (current-buffer) (zmacs-region-buffer)))
270 ;; pseudo-zmacs compatibility: don't beep if this ^G is simply
271 ;; deactivating the region. If it is inactive, beep.
273 (abort-recursive-edit)))
275 ;;;; Guts of minibuffer invocation
277 ;;#### The only things remaining in C are
278 ;; "Vminibuf_prompt" and the display junk
279 ;; "minibuf_prompt_width" and "minibuf_prompt_pix_width"
280 ;; Also "active_frame", though I suspect I could already
281 ;; hack that in Lisp if I could make any sense of the
282 ;; complete mess of frame/frame code in XEmacs.
283 ;; Vminibuf_prompt could easily be made Lisp-bindable.
284 ;; I suspect that minibuf_prompt*_width are actually recomputed
285 ;; by redisplay as needed -- or could be arranged to be so --
286 ;; and that there could be need for read-minibuffer-internal to
287 ;; save and restore them.
288 ;;#### The only other thing which read-from-minibuffer-internal does
289 ;; which we can't presently do in Lisp is move the frame cursor
290 ;; to the start of the minibuffer line as it returns. This is
291 ;; a rather nice touch and should be preserved -- probably by
292 ;; providing some Lisp-level mechanism (extension to cursor-in-echo-area ?)
296 ;; Like reset_buffer in FSF's buffer.c
297 ;; (Except that kill-all-local-variables doesn't nuke 'permanent-local
298 ;; variables -- we preserve them, reset_buffer doesn't.)
299 (defun reset-buffer (buffer)
300 (with-current-buffer buffer
301 ;(if (fboundp 'unlock-buffer) (unlock-buffer))
302 (kill-all-local-variables)
303 (setq buffer-read-only nil)
304 ;; don't let read only text yanked into the minibuffer
305 ;; permanently wedge it.
306 (make-local-variable 'inhibit-read-only)
307 (setq inhibit-read-only t)
309 ;(setq default-directory nil)
310 (setq buffer-file-name nil)
311 (setq buffer-file-truename nil)
312 (set-buffer-modified-p nil)
313 (setq buffer-backed-up nil)
314 (setq buffer-auto-save-file-name nil)
315 (set-buffer-dedicated-frame buffer nil)
318 (defvar minibuffer-history-variable 'minibuffer-history
319 "History list symbol to add minibuffer values to.
320 Each minibuffer output is added with
321 (set minibuffer-history-variable
322 (cons STRING (symbol-value minibuffer-history-variable)))")
323 (defvar minibuffer-history-position)
326 (defvar initial-minibuffer-history-position)
327 (defvar current-minibuffer-contents)
328 (defvar current-minibuffer-point)
330 (defcustom minibuffer-history-minimum-string-length nil
331 "*If this variable is non-nil, a string will not be added to the
332 minibuffer history if its length is less than that value."
333 :type '(choice (const :tag "Any" nil)
337 (define-error 'input-error "Keyboard input error")
339 (put 'input-error 'display-error
340 #'(lambda (error-object stream)
341 (princ (cadr error-object) stream)))
343 (defun read-from-minibuffer (prompt &optional initial-contents
349 "Read a string from the minibuffer, prompting with string PROMPT.
350 If optional second arg INITIAL-CONTENTS is non-nil, it is a string
351 to be inserted into the minibuffer before reading input.
352 If INITIAL-CONTENTS is (STRING . POSITION), the initial input
353 is STRING, but point is placed POSITION characters into the string.
354 Third arg KEYMAP is a keymap to use while reading;
355 if omitted or nil, the default is `minibuffer-local-map'.
356 If fourth arg READ is non-nil, then interpret the result as a lisp object
357 and return that object:
358 in other words, do `(car (read-from-string INPUT-STRING))'
359 Fifth arg HISTORY, if non-nil, specifies a history list
360 and optionally the initial position in the list.
361 It can be a symbol, which is the history list variable to use,
362 or it can be a cons cell (HISTVAR . HISTPOS).
363 In that case, HISTVAR is the history list variable to use,
364 and HISTPOS is the initial position (the position in the list
365 which INITIAL-CONTENTS corresponds to).
366 If HISTORY is `t', no history will be recorded.
367 Positions are counted starting from 1 at the beginning of the list.
368 Sixth arg ABBREV-TABLE, if non-nil, becomes the value of `local-abbrev-table'
370 Seventh arg DEFAULT, if non-nil, will be returned when user enters
373 See also the variable completion-highlight-first-word-only for control over
375 (if (and (not enable-recursive-minibuffers)
376 (> (minibuffer-depth) 0)
377 (eq (selected-window) (minibuffer-window)))
378 (error "Command attempted to use minibuffer while in minibuffer"))
380 (if (and minibuffer-max-depth
381 (> minibuffer-max-depth 0)
382 (>= (minibuffer-depth) minibuffer-max-depth))
383 (minibuffer-max-depth-exceeded))
385 ;; catch this error before the poor user has typed something...
387 (if (symbolp history)
389 (error "History list %S is unbound" history))
390 (or (boundp (car history))
391 (error "History list %S is unbound" (car history)))))
395 ;; XEmacs in -batch mode calls minibuffer: print the prompt.
396 (message "%s" (gettext prompt))
399 ;;#### Should this even be falling though to the code below?
400 ;;#### How does this stuff work now, anyway?
402 (let* ((dir default-directory)
403 (owindow (selected-window))
404 (oframe (selected-frame))
405 (window (minibuffer-window))
406 (buffer (if (eq (minibuffer-depth) 0)
407 (window-buffer window)
408 (get-buffer-create (format " *Minibuf-%d"
409 (minibuffer-depth)))))
410 (frame (window-frame window))
411 (mconfig (if (eq frame (selected-frame))
412 nil (current-window-configuration frame)))
413 (oconfig (current-window-configuration))
414 ;; dynamic scope sucks sucks sucks sucks sucks sucks.
415 ;; `M-x doctor' makes history a local variable, and thus
416 ;; our binding above is buffer-local and doesn't apply
417 ;; once we switch buffers!!!! We demand better scope!
421 (set-buffer (reset-buffer buffer))
422 (setq default-directory dir)
423 (make-local-variable 'print-escape-newlines)
424 (setq print-escape-newlines t)
425 (make-local-variable 'current-minibuffer-contents)
426 (make-local-variable 'current-minibuffer-point)
427 (make-local-variable 'initial-minibuffer-history-position)
428 (setq current-minibuffer-contents ""
429 current-minibuffer-point 1)
430 (if (not minibuffer-smart-completion-tracking-behavior)
432 (make-local-variable 'mode-motion-hook)
435 (setq mode-motion-hook 'minibuffer-smart-mouse-tracker))
436 (make-local-variable 'mouse-track-click-hook)
437 (add-hook 'mouse-track-click-hook
438 'minibuffer-smart-maybe-select-highlighted-completion))
439 (set-window-buffer window buffer)
440 (select-window window)
441 (set-window-hscroll window 0)
442 (buffer-enable-undo buffer)
445 (if (consp initial-contents)
447 (insert (car initial-contents))
448 (goto-char (1+ (cdr initial-contents)))
449 (setq current-minibuffer-contents (car initial-contents)
450 current-minibuffer-point (cdr initial-contents)))
451 (insert initial-contents)
452 (setq current-minibuffer-contents initial-contents
453 current-minibuffer-point (point))))
454 (use-local-map (help-keymap-with-help-key
455 (or keymap minibuffer-local-map)
456 minibuffer-help-form))
457 (let ((mouse-grabbed-buffer
458 (and minibuffer-smart-completion-tracking-behavior
460 (current-prefix-arg current-prefix-arg)
461 ;; (help-form minibuffer-help-form)
462 (minibuffer-history-variable (cond ((not _history_)
468 (minibuffer-history-position (cond ((consp _history_)
472 (minibuffer-scroll-window owindow))
473 (setq initial-minibuffer-history-position
474 minibuffer-history-position)
476 (setq local-abbrev-table abbrev-table
478 ;; This is now run from read-minibuffer-internal
479 ;(if minibuffer-setup-hook
480 ; (run-hooks 'minibuffer-setup-hook))
484 (if (> (recursion-depth) (minibuffer-depth))
485 (let ((standard-output t)
487 (read-minibuffer-internal prompt))
488 (read-minibuffer-internal prompt))))
489 ;; Translate an "abort" (throw 'exit 't)
493 (let* ((val (progn (set-buffer buffer)
494 (if minibuffer-exit-hook
495 (run-hooks 'minibuffer-exit-hook))
496 (if (and (eq (char-after (point-min)) nil)
500 (histval (if (and default (string= val ""))
506 (let ((v (read-from-string val)))
507 (if (< (cdr v) (length val))
509 (or (string-match "[ \t\n]*\\'" val (cdr v))
510 (error "Trailing garbage following expression"))))
512 ;; total total kludge
513 (if (stringp v) (setq v (list 'quote v)))
517 '(input-error "End of input before end of expression")))
518 (error (setq err e))))
519 ;; Add the value to the appropriate history list unless
520 ;; it's already the most recent element, or it's only
521 ;; two characters long.
522 (if (and (symbolp minibuffer-history-variable)
523 (boundp minibuffer-history-variable))
524 (let ((list (symbol-value minibuffer-history-variable)))
527 (and list (equal histval (car list)))
529 minibuffer-history-minimum-string-length
531 minibuffer-history-minimum-string-length))
532 (set minibuffer-history-variable
533 (if minibuffer-history-uniquify
534 (cons histval (remove histval list))
535 (cons histval list))))))
536 (if err (signal (car err) (cdr err)))
538 ;; stupid display code requires this for some reason
540 (buffer-disable-undo buffer)
541 (setq buffer-read-only nil)
544 ;; restore frame configurations
545 (if (and mconfig (frame-live-p oframe)
546 (eq frame (selected-frame)))
547 ;; if we changed frames (due to surrogate minibuffer),
548 ;; and we're still on the new frame, go back to the old one.
549 (select-frame oframe))
550 (if mconfig (set-window-configuration mconfig))
551 (set-window-configuration oconfig))))
554 (defun minibuffer-max-depth-exceeded ()
556 ;; This signals an error if an Nth minibuffer is invoked while N-1 are
557 ;; already active, whether the minibuffer window is selected or not.
558 ;; Since, under X, it's easy to jump out of the minibuffer (by doing M-x,
559 ;; getting distracted, and clicking elsewhere) many many novice users have
560 ;; had the problem of having multiple minibuffers build up, even to the
561 ;; point of exceeding max-lisp-eval-depth. Since the variable
562 ;; enable-recursive-minibuffers historically/crockishly is only consulted
563 ;; when the minibuffer is currently active (like typing M-x M-x) it doesn't
564 ;; help in this situation.
566 ;; This routine also offers to edit .emacs for you to get rid of this
567 ;; complaint, like `disabled' commands do, since it's likely that non-novice
568 ;; users will be annoyed by this change, so we give them an easy way to get
569 ;; rid of it forever.
571 (beep t 'minibuffer-limit-exceeded)
573 "Minibuffer already active: abort it with `^]', enable new one with `n': ")
574 (let ((char (let ((cursor-in-echo-area t)) ; #### doesn't always work??
579 ((y-or-n-p "Enable recursive minibuffers for other sessions too? ")
580 ;; This is completely disgusting, but it's basically what novice.el
581 ;; does. This kind of thing should be generalized.
582 (setq minibuffer-max-depth nil)
586 (substitute-in-file-name custom-file)))
587 (goto-char (point-min))
588 (if (re-search-forward
589 "^(setq minibuffer-max-depth \\([0-9]+\\|'?nil\\|'?()\\))\n"
591 (delete-region (match-beginning 0 ) (match-end 0))
592 ;; Must have been disabled by default.
593 (goto-char (point-max)))
594 (insert"\n(setq minibuffer-max-depth nil)\n")
596 (message "Multiple minibuffers enabled")
599 (abort-recursive-edit))
601 (error "Minibuffer already active")))))
604 ;;;; Guts of minibuffer completion
607 ;; Used by minibuffer-do-completion
608 (defvar last-exact-completion)
610 (defun temp-minibuffer-message (m)
611 (let ((savemax (point-max)))
613 (goto-char (point-max))
616 (let ((inhibit-quit t))
618 (delete-region savemax (point-max))
619 ;; If the user types a ^G while we're in sit-for, then quit-flag
620 ;; gets set. In this case, we want that ^G to be interpreted
621 ;; as a normal character, and act just like typeahead.
622 (if (and quit-flag (not unread-command-event))
623 (setq unread-command-event (character-to-event (quit-char))
627 ;; Determines whether buffer-string is an exact completion
628 (defun exact-minibuffer-completion-p (buffer-string)
629 (cond ((not minibuffer-completion-table)
632 ((vectorp minibuffer-completion-table)
633 (let ((tem (intern-soft buffer-string
634 minibuffer-completion-table)))
636 (and (string-equal buffer-string "nil")
637 ;; intern-soft loses for 'nil
639 (mapatoms #'(lambda (s)
644 minibuffer-completion-table)
646 (if minibuffer-completion-predicate
647 (funcall minibuffer-completion-predicate
651 ((and (consp minibuffer-completion-table)
652 ;;#### Emacs-Lisp truly sucks!
653 ;; lambda, autoload, etc
654 (not (symbolp (car minibuffer-completion-table))))
655 (if (not completion-ignore-case)
656 (assoc buffer-string minibuffer-completion-table)
657 (let ((s (upcase buffer-string))
658 (tail minibuffer-completion-table)
661 (setq tem (car (car tail)))
662 (if (or (equal tem buffer-string)
664 (if tem (equal (upcase tem) s)))
667 (setq tail (cdr tail))))
670 (funcall minibuffer-completion-table
672 minibuffer-completion-predicate
676 ;; 0 'none no possible completion
677 ;; 1 'unique was already an exact and unique completion
678 ;; 3 'exact was already an exact (but nonunique) completion
679 ;; NOT USED 'completed-exact-unique completed to an exact and completion
680 ;; 4 'completed-exact completed to an exact (but nonunique) completion
681 ;; 5 'completed some completion happened
682 ;; 6 'uncompleted no completion happened
683 (defun minibuffer-do-completion-1 (buffer-string completion)
684 (cond ((not completion)
687 ;; exact and unique match
690 ;; It did find a match. Do we match some possibility exactly now?
691 (let ((completedp (not (string-equal completion buffer-string))))
694 ;; Some completion happened
697 (setq buffer-string completion)))
698 (if (exact-minibuffer-completion-p buffer-string)
699 ;; An exact completion was possible
701 ;; Since no callers need to know the difference, don't bother
702 ;; with this (potentially expensive) discrimination.
703 ;; (if (eq (try-completion completion
704 ;; minibuffer-completion-table
705 ;; minibuffer-completion-predicate)
707 ;; 'completed-exact-unique
711 ;; Not an exact match
717 (defun minibuffer-do-completion (buffer-string)
718 (let* ((completion (try-completion buffer-string
719 minibuffer-completion-table
720 minibuffer-completion-predicate))
721 (status (minibuffer-do-completion-1 buffer-string completion))
722 (last last-exact-completion))
723 (setq last-exact-completion nil)
724 (cond ((eq status 'none)
726 (ding nil 'no-completion)
727 (temp-minibuffer-message " [No match]"))
731 ;; It did find a match. Do we match some possibility exactly now?
732 (if (not (string-equal completion buffer-string))
734 ;; Some completion happened
737 (setq buffer-string completion)))
738 (cond ((eq status 'exact)
739 ;; If the last exact completion and this one were
740 ;; the same, it means we've already given a
741 ;; "Complete but not unique" message and that the
742 ;; user's hit TAB again, so now we give help.
743 (setq last-exact-completion completion)
744 (if (equal buffer-string last)
745 (minibuffer-completion-help)))
746 ((eq status 'uncompleted)
747 (if completion-auto-help
748 (minibuffer-completion-help)
749 (temp-minibuffer-message " [Next char not unique]")))
757 (defun completing-read (prompt table
758 &optional predicate require-match
759 initial-contents history default)
760 "Read a string in the minibuffer, with completion.
761 Args: PROMPT, TABLE, PREDICATE, REQUIRE-MATCH, INITIAL-CONTENTS, HISTORY.
762 PROMPT is a string to prompt with; normally it ends in a colon and a space.
763 TABLE is an alist whose elements' cars are strings, or an obarray.
764 PREDICATE limits completion to a subset of TABLE.
765 See `try-completion' for more details on completion, TABLE, and PREDICATE.
766 If REQUIRE-MATCH is non-nil, the user is not allowed to exit unless
767 the input is (or completes to) an element of TABLE or is null.
768 If it is also not t, Return does not exit if it does non-null completion.
769 If INITIAL-CONTENTS is non-nil, insert it in the minibuffer initially.
770 If it is (STRING . POSITION), the initial input
771 is STRING, but point is placed POSITION characters into the string.
772 HISTORY, if non-nil, specifies a history list
773 and optionally the initial position in the list.
774 It can be a symbol, which is the history list variable to use,
775 or it can be a cons cell (HISTVAR . HISTPOS).
776 In that case, HISTVAR is the history list variable to use,
777 and HISTPOS is the initial position (the position in the list
778 which INITIAL-CONTENTS corresponds to).
779 If HISTORY is `t', no history will be recorded.
780 Positions are counted starting from 1 at the beginning of the list.
781 DEFAULT, if non-nil, is the default value.
782 Completion ignores case if the ambient value of
783 `completion-ignore-case' is non-nil."
784 (let ((minibuffer-completion-table table)
785 (minibuffer-completion-predicate predicate)
786 (minibuffer-completion-confirm (if (eq require-match 't) nil t))
787 (last-exact-completion nil)
789 (setq ret (read-from-minibuffer prompt
791 (if (not require-match)
792 minibuffer-local-completion-map
793 minibuffer-local-must-match-map)
798 (if (and (string= ret "")
804 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
805 ;;;; Minibuffer completion commands ;;;;
806 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
809 (defun minibuffer-complete ()
810 "Complete the minibuffer contents as far as possible.
811 Return nil if there is no valid completion, else t.
812 If no characters can be completed, display a list of possible completions.
813 If you repeat this command after it displayed such a list,
814 scroll the window of possible completions."
816 ;; If the previous command was not this, then mark the completion
818 (or (eq last-command this-command)
819 (setq minibuffer-scroll-window nil))
820 (let ((window minibuffer-scroll-window))
821 (if (and window (windowp window) (window-buffer window)
822 (buffer-name (window-buffer window)))
823 ;; If there's a fresh completion window with a live buffer
824 ;; and this command is repeated, scroll that window.
825 (let ((obuf (current-buffer)))
828 (set-buffer (window-buffer window))
829 (if (pos-visible-in-window-p (point-max) window)
830 ;; If end is in view, scroll up to the beginning.
831 (set-window-start window (point-min))
832 ;; Else scroll down one frame.
833 (scroll-other-window)))
836 (let ((status (minibuffer-do-completion (buffer-string))))
837 (if (eq status 'none)
840 (cond ((eq status 'unique)
841 (temp-minibuffer-message
842 " [Sole completion]"))
844 (temp-minibuffer-message
845 " [Complete, but not unique]")))
849 (defun minibuffer-complete-and-exit ()
850 "Complete the minibuffer contents, and maybe exit.
851 Exit if the name is valid with no completion needed.
852 If name was completed to a valid match,
853 a repetition of this command will exit."
855 (if (= (point-min) (point-max))
856 ;; Crockishly allow user to specify null string
858 (let ((buffer-string (buffer-string)))
859 ;; Short-cut -- don't call minibuffer-do-completion if we already
860 ;; have an (possibly nonunique) exact completion.
861 (if (exact-minibuffer-completion-p buffer-string)
863 (let ((status (minibuffer-do-completion buffer-string)))
864 (if (or (eq status 'unique)
866 (if (or (eq status 'completed-exact)
867 (eq status 'completed-exact-unique))
868 (if minibuffer-completion-confirm
869 (progn (temp-minibuffer-message " [Confirm]")
872 (throw 'exit nil)))))
875 (defun self-insert-and-exit ()
876 "Terminate minibuffer input."
878 (self-insert-command 1)
881 (defun exit-minibuffer ()
882 "Terminate this minibuffer argument.
883 If minibuffer-confirm-incomplete is true, and we are in a completing-read
884 of some kind, and the contents of the minibuffer is not an existing
885 completion, requires an additional RET before the minibuffer will be exited
886 \(assuming that RET was the character that invoked this command:
887 the character in question must be typed again)."
889 (if (not minibuffer-confirm-incomplete)
891 (let ((buffer-string (buffer-string)))
892 (if (exact-minibuffer-completion-p buffer-string)
894 (let ((completion (if (not minibuffer-completion-table)
896 (try-completion buffer-string
897 minibuffer-completion-table
898 minibuffer-completion-predicate))))
899 (if (or (eq completion 't)
900 ;; Crockishly allow user to specify null string
901 (string-equal buffer-string ""))
903 (if completion ;; rewritten for I18N3 snarfing
904 (temp-minibuffer-message " [incomplete; confirm]")
905 (temp-minibuffer-message " [no completions; confirm]"))
906 (let ((event (let ((inhibit-quit t))
909 (setq quit-flag nil)))))
910 (cond ((equal event last-command-event)
912 ((equal (quit-char) (event-to-character event))
915 (dispatch-event event)))))
917 ;;;; minibuffer-complete-word
920 ;;;#### I think I have done this correctly; it certainly is simpler
921 ;;;#### than what the C code seemed to be trying to do.
922 (defun minibuffer-complete-word ()
923 "Complete the minibuffer contents at most a single word.
924 After one word is completed as much as possible, a space or hyphen
925 is added, provided that matches some possible completion.
926 Return nil if there is no valid completion, else t."
928 (let* ((buffer-string (buffer-string))
929 (completion (try-completion buffer-string
930 minibuffer-completion-table
931 minibuffer-completion-predicate))
932 (status (minibuffer-do-completion-1 buffer-string completion)))
933 (cond ((eq status 'none)
934 (ding nil 'no-completion)
935 (temp-minibuffer-message " [No match]")
938 ;; New message, only in this new Lisp code
939 (temp-minibuffer-message " [Sole completion]")
942 (cond ((or (eq status 'uncompleted)
944 (let ((foo #'(lambda (s)
947 (concat buffer-string s)
948 minibuffer-completion-table
949 minibuffer-completion-predicate)
951 (goto-char (point-max))
956 (char last-command-char))
957 ;; Try to complete by adding a word-delimiter
958 (or (and (characterp char) (> char 0)
959 (funcall foo (char-to-string char)))
960 (and (not (eq char ?\ ))
962 (and (not (eq char ?\-))
965 (if completion-auto-help
966 (minibuffer-completion-help)
967 ;; New message, only in this new Lisp code
968 ;; rewritten for I18N3 snarfing
969 (if (eq status 'exact)
970 (temp-minibuffer-message
971 " [Complete, but not unique]")
972 (temp-minibuffer-message " [Ambiguous]")))
977 ;; First word-break in stuff found by completion
978 (goto-char (point-min))
979 (let ((len (length buffer-string))
981 (if (and (< len (length completion))
986 (upcase (aref buffer-string n))
987 (upcase (aref completion n)))
992 (goto-char (point-min))
994 (re-search-forward "\\W" nil t)))
995 (delete-region (point) (point-max))
996 (goto-char (point-max))))
1000 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1001 ;;;; "Smart minibuffer" hackery ;;;;
1002 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1004 ;;; ("Kludgy minibuffer hackery" is perhaps a better name)
1006 ;; This works by setting `mouse-grabbed-buffer' to the minibuffer,
1007 ;; defining button2 in the minibuffer keymap to
1008 ;; `minibuffer-smart-select-highlighted-completion', and setting the
1009 ;; mode-motion-hook of the minibuffer to `minibuffer-mouse-tracker'.
1010 ;; By setting `mouse-grabbed-buffer', the minibuffer's keymap and
1011 ;; mode-motion-hook apply (for mouse motion and presses) no matter
1012 ;; what buffer the mouse is over. Then, `minibuffer-mouse-tracker'
1013 ;; examines the text under the mouse looking for something that looks
1014 ;; like a completion, and causes it to be highlighted, and
1015 ;; `minibuffer-smart-select-highlighted-completion' looks for a
1016 ;; flagged completion under the mouse and inserts it. This has the
1017 ;; following advantages:
1019 ;; -- filenames and such in any buffer can be inserted by clicking,
1020 ;; not just completions
1022 ;; but the following disadvantages:
1024 ;; -- unless you're aware of the "filename in any buffer" feature,
1025 ;; the fact that strings in arbitrary buffers get highlighted appears
1027 ;; -- mouse motion can cause ange-ftp actions -- bad bad bad.
1029 ;; There's some hackery in minibuffer-mouse-tracker to try to avoid the
1030 ;; ange-ftp stuff, but it doesn't work.
1033 (defcustom minibuffer-smart-completion-tracking-behavior nil
1034 "*If non-nil, look for completions under mouse in all buffers.
1035 This allows you to click on something that looks like a completion
1036 and have it selected, regardless of what buffer it is in.
1038 This is not enabled by default because
1040 -- The \"mysterious\" highlighting in normal buffers is confusing to
1041 people not expecting it, and looks like a bug
1042 -- If ange-ftp is enabled, this tracking sometimes causes ange-ftp
1043 action as a result of mouse motion, which is *bad bad bad*.
1044 Hopefully this bug will be fixed at some point."
1048 (defun minibuffer-smart-mouse-tracker (event)
1049 ;; Used as the mode-motion-hook of the minibuffer window, which is the
1050 ;; value of `mouse-grabbed-buffer' while the minibuffer is active. If
1051 ;; the word under the mouse is a valid minibuffer completion, then it
1054 ;; We do some special voodoo when we're reading a pathname, because
1055 ;; the way filename completion works is funny. Possibly there's some
1056 ;; more general way this could be dealt with...
1058 ;; We do some further voodoo when reading a pathname that is an
1059 ;; ange-ftp or efs path, because causing FTP activity as a result of
1060 ;; mouse motion is a really bad time.
1062 (and minibuffer-smart-completion-tracking-behavior
1064 ;; avoid conflict with display-completion-list extents
1065 (not (extent-at (event-point event)
1066 (event-buffer event)
1068 (let ((filename-kludge-p (eq minibuffer-completion-table
1069 'read-file-name-internal)))
1070 (mode-motion-highlight-internal
1072 #'(lambda () (default-mouse-track-beginning-of-word
1073 (if filename-kludge-p 'nonwhite t)))
1077 (default-mouse-track-end-of-word
1078 (if filename-kludge-p 'nonwhite t))
1079 (if (and (/= p (point)) minibuffer-completion-table)
1080 (setq string (buffer-substring p (point))))
1081 (if (string-match "\\`[ \t\n]*\\'" string)
1083 (if filename-kludge-p
1084 (setq string (minibuffer-smart-select-kludge-filename
1086 ;; try-completion bogusly returns a string even when
1087 ;; that string is complete if that string is also a
1088 ;; prefix for other completions. This means that we
1089 ;; can't just do the obvious thing, (eq t
1090 ;; (try-completion ...)).
1092 (if (and filename-kludge-p
1093 ;; #### evil evil evil evil
1094 (or (and (fboundp 'ange-ftp-ftp-path)
1095 (ange-ftp-ftp-path string))
1096 (and (fboundp 'efs-ftp-path)
1097 (efs-ftp-path string))))
1100 (try-completion string
1101 minibuffer-completion-table
1102 minibuffer-completion-predicate)))
1104 (and (equal comp string)
1105 (or (null minibuffer-completion-predicate)
1107 minibuffer-completion-predicate) ; ???
1108 (funcall minibuffer-completion-predicate
1110 minibuffer-completion-table)
1113 minibuffer-completion-table)
1115 (goto-char p))))))))))
1117 (defun minibuffer-smart-select-kludge-filename (string)
1119 (set-buffer mouse-grabbed-buffer) ; the minibuf
1120 (let ((kludge-string (concat (buffer-string) string)))
1121 (if (or (and (fboundp 'ange-ftp-ftp-path)
1122 (ange-ftp-ftp-path kludge-string))
1123 (and (fboundp 'efs-ftp-path) (efs-ftp-path kludge-string)))
1124 ;; #### evil evil evil, but more so.
1126 (append-expand-filename (buffer-string) string)))))
1128 (defun minibuffer-smart-select-highlighted-completion (event)
1129 "Select the highlighted text under the mouse as a minibuffer response.
1130 When the minibuffer is being used to prompt the user for a completion,
1131 any valid completions which are visible on the frame will highlight
1132 when the mouse moves over them. Clicking \\<minibuffer-local-map>\
1133 \\[minibuffer-smart-select-highlighted-completion] will select the
1134 highlighted completion under the mouse.
1136 If the mouse is clicked while not over a highlighted completion,
1137 then the global binding of \\[minibuffer-smart-select-highlighted-completion] \
1138 will be executed instead. In this\nway you can get at the normal global \
1139 behavior of \\[minibuffer-smart-select-highlighted-completion] as well as
1140 the special minibuffer behavior."
1142 (if minibuffer-smart-completion-tracking-behavior
1143 (minibuffer-smart-select-highlighted-completion-1 event t)
1144 (let ((command (lookup-key global-map
1145 (vector current-mouse-event))))
1146 (if command (call-interactively command)))))
1148 (defun minibuffer-smart-select-highlighted-completion-1 (event global-p)
1149 (let* ((filename-kludge-p (eq minibuffer-completion-table
1150 'read-file-name-internal))
1153 (evpoint (event-point event))
1154 (evextent (and evpoint (extent-at evpoint (event-buffer event)
1157 ;; avoid conflict with display-completion-list extents.
1158 ;; if we find one, do that behavior instead.
1159 (list-mode-item-selected-1 evextent event)
1161 (let* ((buffer (window-buffer (event-window event)))
1162 (p (event-point event))
1163 (extent (and p (extent-at p buffer 'mouse-face))))
1165 (if (not (and (extent-live-p extent)
1166 (eq (extent-object extent) (current-buffer))
1167 (not (extent-detached-p extent))))
1169 ;; ...else user has selected a highlighted completion.
1171 (buffer-substring (extent-start-position extent)
1172 (extent-end-position extent)))
1173 (if filename-kludge-p
1174 (setq completion (minibuffer-smart-select-kludge-filename
1176 ;; remove the extent so that it's not hanging around in
1178 (detach-extent extent)
1179 (set-buffer mouse-grabbed-buffer)
1181 (insert completion))))
1182 ;; we need to execute the command or do the throw outside of the
1184 (cond ((and command-p global-p)
1185 (let ((command (lookup-key global-map
1186 (vector current-mouse-event))))
1188 (call-interactively command)
1189 (if minibuffer-completion-table
1191 "Highlighted words are valid completions. You may select one.")
1192 (error "no completions")))))
1194 ;; things get confused if the minibuffer is terminated while
1196 (select-window (minibuffer-window))
1197 (if (and filename-kludge-p (file-directory-p completion))
1198 ;; if the user clicked middle on a directory name, display the
1199 ;; files in that directory.
1201 (goto-char (point-max))
1202 (minibuffer-completion-help))
1203 ;; otherwise, terminate input
1204 (throw 'exit nil)))))))
1206 (defun minibuffer-smart-maybe-select-highlighted-completion
1207 (event &optional click-count)
1208 "Like minibuffer-smart-select-highlighted-completion but does nothing if
1209 there is no completion (as opposed to executing the global binding). Useful
1210 as the value of `mouse-track-click-hook'."
1212 (minibuffer-smart-select-highlighted-completion-1 event nil))
1214 (define-key minibuffer-local-map 'button2
1215 'minibuffer-smart-select-highlighted-completion)
1218 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1219 ;;;; Minibuffer History ;;;;
1220 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1222 (defvar minibuffer-history '()
1223 "Default minibuffer history list.
1224 This is used for all minibuffer input except when an alternate history
1225 list is specified.")
1227 ;; Some other history lists:
1229 (defvar minibuffer-history-search-history '())
1230 (defvar function-history '())
1231 (defvar variable-history '())
1232 (defvar buffer-history '())
1233 (defvar shell-command-history '())
1234 (defvar file-name-history '())
1236 (defvar read-expression-history nil)
1238 (defvar minibuffer-history-sexp-flag nil ;weird FSF Emacs kludge
1239 "Non-nil when doing history operations on `command-history'.
1240 More generally, indicates that the history list being acted on
1241 contains expressions rather than strings.")
1243 (defun previous-matching-history-element (regexp n)
1244 "Find the previous history element that matches REGEXP.
1245 \(Previous history elements refer to earlier actions.)
1246 With prefix argument N, search for Nth previous match.
1247 If N is negative, find the next or Nth next match."
1249 (let ((enable-recursive-minibuffers t)
1250 (minibuffer-history-sexp-flag nil))
1251 (if (eq 't (symbol-value minibuffer-history-variable))
1252 (error "History is not being recorded in this context"))
1253 (list (read-from-minibuffer "Previous element matching (regexp): "
1254 (car minibuffer-history-search-history)
1255 minibuffer-local-map
1257 'minibuffer-history-search-history)
1258 (prefix-numeric-value current-prefix-arg))))
1259 (let ((history (symbol-value minibuffer-history-variable))
1261 (pos minibuffer-history-position))
1263 (error "History is not being recorded in this context"))
1266 (setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history)))
1268 (if (= pos 1) ;; rewritten for I18N3 snarfing
1269 (error "No later matching history item")
1270 (error "No earlier matching history item")))
1271 (if (string-match regexp
1272 (if minibuffer-history-sexp-flag
1273 (let ((print-level nil))
1274 (prin1-to-string (nth (1- pos) history)))
1275 (nth (1- pos) history)))
1276 (setq n (+ n (if (< n 0) 1 -1)))))
1277 (setq minibuffer-history-position pos)
1278 (setq current-minibuffer-contents (buffer-string)
1279 current-minibuffer-point (point))
1281 (let ((elt (nth (1- pos) history)))
1282 (insert (if minibuffer-history-sexp-flag
1283 (let ((print-level nil))
1284 (prin1-to-string elt))
1286 (goto-char (point-min)))
1287 (if (or (eq (car (car command-history)) 'previous-matching-history-element)
1288 (eq (car (car command-history)) 'next-matching-history-element))
1289 (setq command-history (cdr command-history))))
1291 (defun next-matching-history-element (regexp n)
1292 "Find the next history element that matches REGEXP.
1293 \(The next history element refers to a more recent action.)
1294 With prefix argument N, search for Nth next match.
1295 If N is negative, find the previous or Nth previous match."
1297 (let ((enable-recursive-minibuffers t)
1298 (minibuffer-history-sexp-flag nil))
1299 (if (eq t (symbol-value minibuffer-history-variable))
1300 (error "History is not being recorded in this context"))
1301 (list (read-from-minibuffer "Next element matching (regexp): "
1302 (car minibuffer-history-search-history)
1303 minibuffer-local-map
1305 'minibuffer-history-search-history)
1306 (prefix-numeric-value current-prefix-arg))))
1307 (previous-matching-history-element regexp (- n)))
1309 (defun next-history-element (n)
1310 "Insert the next element of the minibuffer history into the minibuffer."
1312 (if (eq 't (symbol-value minibuffer-history-variable))
1313 (error "History is not being recorded in this context"))
1315 (when (eq minibuffer-history-position
1316 initial-minibuffer-history-position)
1317 (setq current-minibuffer-contents (buffer-string)
1318 current-minibuffer-point (point)))
1319 (let ((narg (- minibuffer-history-position n))
1320 (minimum (if minibuffer-default -1 0)))
1321 (cond ((< narg minimum)
1322 (error "No following item in %s" minibuffer-history-variable))
1323 ((> narg (length (symbol-value minibuffer-history-variable)))
1324 (error "No preceding item in %s" minibuffer-history-variable)))
1326 (setq minibuffer-history-position narg)
1327 (if (eq narg initial-minibuffer-history-position)
1329 (insert current-minibuffer-contents)
1330 (goto-char current-minibuffer-point))
1331 (let ((elt (if (>= narg 0)
1332 (nth (1- minibuffer-history-position)
1333 (symbol-value minibuffer-history-variable))
1334 minibuffer-default)))
1336 (if (not (stringp elt))
1337 (let ((print-level nil))
1339 (let ((print-readably t)
1340 (print-escape-newlines t))
1341 (prin1-to-string elt))
1342 (error (prin1-to-string elt))))
1344 ;; FSF has point-min here.
1345 (goto-char (point-max))))))
1347 (defun previous-history-element (n)
1348 "Insert the previous element of the minibuffer history into the minibuffer."
1350 (next-history-element (- n)))
1352 (defun next-complete-history-element (n)
1353 "Get next element of history which is a completion of minibuffer contents."
1355 (let ((point-at-start (point)))
1356 (next-matching-history-element
1357 (concat "^" (regexp-quote (buffer-substring (point-min) (point)))) n)
1358 ;; next-matching-history-element always puts us at (point-min).
1359 ;; Move to the position we were at before changing the buffer contents.
1360 ;; This is still sensical, because the text before point has not changed.
1361 (goto-char point-at-start)))
1363 (defun previous-complete-history-element (n)
1364 "Get previous element of history which is a completion of minibuffer contents."
1366 (next-complete-history-element (- n)))
1369 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1370 ;;;; reading various things from a minibuffer ;;;;
1371 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1373 (defun read-expression (prompt &optional initial-contents history)
1374 "Return a Lisp object read using the minibuffer.
1375 Prompt with PROMPT. If non-nil, optional second arg INITIAL-CONTENTS
1376 is a string to insert in the minibuffer before reading.
1377 Third arg HISTORY, if non-nil, specifies a history list."
1378 (let ((minibuffer-history-sexp-flag t)
1379 ;; Semi-kludge to get around M-x C-x o M-ESC trying to do completion.
1380 (minibuffer-completion-table nil))
1381 (read-from-minibuffer prompt
1385 (or history 'read-expression-history)
1386 lisp-mode-abbrev-table)))
1388 (defun read-string (prompt &optional initial-contents history)
1389 "Return a string from the minibuffer, prompting with string PROMPT.
1390 If non-nil, optional second arg INITIAL-CONTENTS is a string to insert
1391 in the minibuffer before reading.
1392 Third arg HISTORY, if non-nil, specifies a history list."
1393 (let ((minibuffer-completion-table nil))
1394 (read-from-minibuffer prompt
1396 minibuffer-local-map
1399 (defun eval-minibuffer (prompt &optional initial-contents history)
1400 "Return value of Lisp expression read using the minibuffer.
1401 Prompt with PROMPT. If non-nil, optional second arg INITIAL-CONTENTS
1402 is a string to insert in the minibuffer before reading.
1403 Third arg HISTORY, if non-nil, specifies a history list."
1404 (eval (read-expression prompt initial-contents history)))
1406 ;; The name `command-history' is already taken
1407 (defvar read-command-history '())
1409 (defun read-command (prompt)
1410 "Read the name of a command and return as a symbol.
1411 Prompts with PROMPT."
1412 (intern (completing-read prompt obarray 'commandp t nil
1413 ;; 'command-history is not right here: that's a
1414 ;; list of evalable forms, not a history list.
1415 'read-command-history
1418 (defun read-function (prompt)
1419 "Read the name of a function and return as a symbol.
1420 Prompts with PROMPT."
1421 (intern (completing-read prompt obarray 'fboundp t nil
1422 'function-history)))
1424 (defun read-variable (prompt)
1425 "Read the name of a user variable and return it as a symbol.
1426 Prompts with PROMPT.
1427 A user variable is one whose documentation starts with a `*' character."
1428 (intern (completing-read prompt obarray 'user-variable-p t nil
1429 'variable-history)))
1431 (defun read-buffer (prompt &optional default require-match)
1432 "Read the name of a buffer and return as a string.
1433 Prompts with PROMPT. Optional second arg DEFAULT is value to return if user
1434 enters an empty line. If optional third arg REQUIRE-MATCH is non-nil,
1435 only existing buffer names are allowed."
1436 (let ((prompt (if default
1437 (format "%s(default %s) "
1438 (gettext prompt) (if (bufferp default)
1439 (buffer-name default)
1442 (alist (mapcar #'(lambda (b) (cons (buffer-name b) b))
1446 (setq result (completing-read prompt alist nil require-match
1448 (if default (buffer-name default))))
1449 (cond ((not (equal result ""))
1451 ((not require-match)
1452 (setq result default)
1456 ((not (get-buffer default))
1459 (setq result default)
1461 (if (bufferp result)
1462 (buffer-name result)
1465 (defun read-number (prompt &optional integers-only)
1466 "Read a number from the minibuffer."
1467 (let ((pred (if integers-only 'integerp 'numberp))
1469 (while (not (funcall pred num))
1470 (setq num (condition-case ()
1471 (let ((minibuffer-completion-table nil))
1472 (read-from-minibuffer
1473 prompt (if num (prin1-to-string num)) nil t
1476 (invalid-read-syntax nil)
1478 (or (funcall pred num) (beep)))
1481 (defun read-shell-command (prompt &optional initial-input history)
1482 "Just like read-string, but uses read-shell-command-map:
1483 \\{read-shell-command-map}"
1484 (let ((minibuffer-completion-table nil))
1485 (read-from-minibuffer prompt initial-input read-shell-command-map
1486 nil (or history 'shell-command-history))))
1489 ;;; This read-file-name stuff probably belongs in files.el
1491 ;; Quote "$" as "$$" to get it past substitute-in-file-name
1492 (defun un-substitute-in-file-name (string)
1493 (let ((regexp "\\$")
1494 (olen (length string))
1497 (if (not (string-match regexp string))
1500 (while (string-match regexp string (match-end 0))
1502 (setq new (make-string (+ olen n) ?$))
1505 (setq ch (aref string o))
1507 (setq o (1+ o) n (1+ n))
1509 ;; already aset by make-string initial-value
1513 (defun read-file-name-2 (history prompt dir default
1514 must-match initial-contents
1517 (setq dir default-directory))
1518 (setq dir (abbreviate-file-name dir t))
1519 (let* ((insert (cond ((and (not insert-default-directory)
1520 (not initial-contents))
1523 (cons (un-substitute-in-file-name
1524 (concat dir initial-contents))
1527 (un-substitute-in-file-name dir))))
1529 ;; Hateful, broken, case-sensitive un*x
1530 ;;; (completing-read prompt
1536 ;; #### - this is essentially the guts of completing read.
1537 ;; There should be an elegant way to pass a pair of keymaps to
1538 ;; completing read, but this will do for now. All sins are
1540 (let ((minibuffer-completion-table completer)
1541 (minibuffer-completion-predicate dir)
1542 (minibuffer-completion-confirm (if (eq must-match 't)
1544 (last-exact-completion nil))
1545 (read-from-minibuffer prompt
1547 (if (not must-match)
1549 read-file-name-must-match-map)
1553 ;;; ;; Kludge! Put "/foo/bar" on history rather than "/default//foo/bar"
1554 ;;; (let ((hist (cond ((not history) 'minibuffer-history)
1555 ;;; ((consp history) (car history))
1559 ;;; (not (eq hist 't))
1561 ;;; (equal (car-safe (symbol-value hist)) val))
1562 ;;; (let ((e (condition-case nil
1563 ;;; (expand-file-name val)
1565 ;;; (if (and e (not (equal e val)))
1566 ;;; (set hist (cons e (cdr (symbol-value hist))))))))
1569 (error "No file name specified"))
1571 (equal val (if (consp insert) (car insert) insert)))
1574 (substitute-in-file-name val)))))
1576 ;; #### this function should use minibuffer-completion-table
1577 ;; or something. But that is sloooooow.
1578 ;; #### all this shit needs better documentation!!!!!!!!
1579 (defun read-file-name-activate-callback (event extent dir-p)
1580 ;; used as the activate-callback of the filename list items
1581 ;; in the completion buffer, in place of default-choose-completion.
1582 ;; if a regular file was selected, we call default-choose-completion
1583 ;; (which just inserts the string in the minibuffer and calls
1584 ;; exit-minibuffer). If a directory was selected, we display
1585 ;; the contents of the directory.
1586 (let* ((file (extent-string extent))
1587 (completion-buf (extent-object extent))
1588 (minibuf (symbol-value-in-buffer 'completion-reference-buffer
1590 (in-dir (file-name-directory (buffer-substring nil nil minibuf)))
1591 (full (expand-file-name file in-dir)))
1592 (if (not (file-directory-p full))
1593 (default-choose-completion event extent minibuf)
1594 (erase-buffer minibuf)
1595 (insert-string (file-name-as-directory
1596 (abbreviate-file-name full t)) minibuf)
1597 (reset-buffer completion-buf)
1598 (let ((standard-output completion-buf))
1599 (display-completion-list
1600 (delete "." (directory-files full nil nil nil (if dir-p 'directory)))
1602 :reference-buffer minibuf
1603 :activate-callback 'read-file-name-activate-callback)
1604 (goto-char (point-min) completion-buf)))))
1606 (defun read-file-name-1 (history prompt dir default
1607 must-match initial-contents
1609 (if (should-use-dialog-box-p)
1610 ;; this calls read-file-name-2
1611 (mouse-read-file-name-1 history prompt dir default must-match
1612 initial-contents completer)
1615 ;; #### SCREAM! Create a `file-system-ignore-case'
1616 ;; function, so this kind of stuff is generalized!
1617 (and (eq system-type 'windows-nt)
1618 (set (make-local-variable 'completion-ignore-case) t))
1620 (make-local-variable
1621 'completion-display-completion-list-function)
1622 #'(lambda (completions)
1623 (display-completion-list
1625 :user-data (not (eq completer 'read-file-name-internal))
1627 'read-file-name-activate-callback)))
1629 (remove-hook 'minibuffer-setup-hook rfhookfun)
1633 (add-hook 'minibuffer-setup-hook rfhookfun)
1634 (read-file-name-2 history prompt dir default must-match
1635 initial-contents completer))
1636 (remove-hook 'minibuffer-setup-hook rfhookfun)))))
1638 (defun read-file-name (prompt
1639 &optional dir default must-match initial-contents
1641 "Read file name, prompting with PROMPT and completing in directory DIR.
1642 This will prompt with a dialog box if appropriate, according to
1643 `should-use-dialog-box-p'.
1644 Value is not expanded---you must call `expand-file-name' yourself.
1645 Value is subject to interpreted by substitute-in-file-name however.
1646 Default name to DEFAULT if user enters a null string.
1647 (If DEFAULT is omitted, the visited file name is used,
1648 except that if INITIAL-CONTENTS is specified, that combined with DIR is
1650 Fourth arg MUST-MATCH non-nil means require existing file's name.
1651 Non-nil and non-t means also require confirmation after completion.
1652 Fifth arg INITIAL-CONTENTS specifies text to start with.
1653 Sixth arg HISTORY specifies the history list to use. Default is
1654 `file-name-history'.
1655 DIR defaults to current buffer's directory default."
1657 (or history 'file-name-history)
1658 prompt dir (or default
1659 (if initial-contents (expand-file-name initial-contents dir)
1661 must-match initial-contents
1662 ;; A separate function (not an anonymous lambda-expression)
1663 ;; and passed as a symbol because of disgusting kludges in various
1664 ;; places which do stuff like (let ((filename-kludge-p (eq minibuffer-completion-table 'read-file-name-internal))) ...)
1665 'read-file-name-internal))
1667 (defun read-directory-name (prompt
1668 &optional dir default must-match initial-contents
1670 "Read directory name, prompting with PROMPT and completing in directory DIR.
1671 This will prompt with a dialog box if appropriate, according to
1672 `should-use-dialog-box-p'.
1673 Value is not expanded---you must call `expand-file-name' yourself.
1674 Value is subject to interpreted by substitute-in-file-name however.
1675 Default name to DEFAULT if user enters a null string.
1676 (If DEFAULT is omitted, the current buffer's default directory is used.)
1677 Fourth arg MUST-MATCH non-nil means require existing directory's name.
1678 Non-nil and non-t means also require confirmation after completion.
1679 Fifth arg INITIAL-CONTENTS specifies text to start with.
1680 Sixth arg HISTORY specifies the history list to use. Default is
1681 `file-name-history'.
1682 DIR defaults to current buffer's directory default."
1684 (or history 'file-name-history)
1685 prompt dir (or default default-directory) must-match initial-contents
1686 'read-directory-name-internal))
1689 ;; Environment-variable and ~username completion hack
1690 (defun read-file-name-internal-1 (string dir action completer)
1691 (if (not (string-match
1692 "\\([^$]\\|\\`\\)\\(\\$\\$\\)*\\$\\([A-Za-z0-9_]*\\|{[^}]*\\)\\'"
1694 ;; Not doing environment-variable completion hack
1695 (let* ((orig (if (equal string "") nil string))
1696 (sstring (if orig (substitute-in-file-name string) string))
1697 (specdir (if orig (file-name-directory sstring) nil))
1698 (name (if orig (file-name-nondirectory sstring) string))
1699 (direct (if specdir (expand-file-name specdir dir) dir)))
1700 ;; ~username completion
1701 (if (and (fboundp 'user-name-completion-1)
1702 (string-match "^[~]" name))
1703 (let ((user (substring name 1)))
1704 (cond ((eq action 'lambda)
1705 (file-directory-p name))
1708 (mapcar #'(lambda (p) (concat "~" p))
1709 (user-name-all-completions user)))
1712 (let* ((val+uniq (user-name-completion-1 user))
1713 (val (car val+uniq))
1714 (uniq (cdr val+uniq)))
1715 (cond ((stringp val)
1717 (file-name-as-directory (concat "~" val))
1720 (file-name-as-directory name))
1729 ;; An odd number of trailing $'s
1730 (let* ((start (match-beginning 3))
1731 (env (substring string
1732 (cond ((= start (length string))
1735 ((= (aref string start) ?{)
1740 (head (substring string 0 (1- start)))
1742 (mapcar #'(lambda (x)
1743 (cons (substring x 0 (string-match "=" x))
1745 process-environment))))
1747 (cond ((eq action 'lambda)
1751 (mapcar #'(lambda (p)
1752 (if (and (> (length p) 0)
1753 ;;#### Unix-specific
1754 ;;#### -- need absolute-pathname-p
1757 (concat head "$" p)))
1758 (all-completions env (funcall alist))))
1761 (let* ((e (funcall alist))
1762 (val (try-completion env e)))
1763 (cond ((stringp val)
1764 (if (string-match "[^A-Za-z0-9_]" val)
1767 ;; completed uniquely?
1768 (if (eq (try-completion val e) 't)
1770 (concat head "$" val)))
1773 (un-substitute-in-file-name (getenv env))))
1777 (defun read-file-name-internal (string dir action)
1778 (read-file-name-internal-1
1780 #'(lambda (action orig string specdir dir name)
1781 (cond ((eq action 'lambda)
1784 (let ((sstring (condition-case nil
1785 (expand-file-name string)
1788 ;; Some pathname syntax error in string
1790 (file-exists-p sstring)))))
1793 (mapcar #'un-substitute-in-file-name
1794 (file-name-all-completions name dir)))
1797 (let* ((d (or dir default-directory))
1798 (val (file-name-completion name d)))
1799 (if (and (eq val 't)
1800 (not (null completion-ignored-extensions)))
1801 ;;#### (file-name-completion "foo") returns 't
1802 ;; when both "foo" and "foo~" exist and the latter
1803 ;; is "pruned" by completion-ignored-extensions.
1804 ;; I think this is a bug in file-name-completion.
1805 (setq val (let ((completion-ignored-extensions '()))
1806 (file-name-completion name d))))
1808 (un-substitute-in-file-name (if specdir
1809 (concat specdir val)
1811 (let ((tem (un-substitute-in-file-name string)))
1812 (if (not (equal tem orig))
1813 ;; substitute-in-file-name did something
1817 (defun read-directory-name-internal (string dir action)
1818 (read-file-name-internal-1
1820 #'(lambda (action orig string specdir dir name)
1821 (let* ((dirs #'(lambda (fn)
1822 (let ((l (if (equal name "")
1832 (concat "\\`" (regexp-quote name))
1838 (cond ((eq action 'lambda)
1842 (file-directory-p string)))
1845 (funcall dirs #'(lambda (n)
1846 (un-substitute-in-file-name
1847 (file-name-as-directory n)))))
1850 (let ((val (try-completion
1854 (list (file-name-as-directory
1857 (un-substitute-in-file-name (if specdir
1858 (concat specdir val)
1860 (let ((tem (un-substitute-in-file-name string)))
1861 (if (not (equal tem orig))
1862 ;; substitute-in-file-name did something
1866 (defun append-expand-filename (file-string string)
1867 "Append STRING to FILE-STRING differently depending on whether STRING
1868 is a username (~string), an environment variable ($string),
1869 or a filename (/string). The resultant string is returned with the
1870 environment variable or username expanded and resolved to indicate
1871 whether it is a file(/result) or a directory (/result/)."
1873 (cond ((string-match "\\([~$]\\)\\([^~$/]*\\)$" file-string)
1874 (cond ((string= (substring file-string
1877 (concat (substring file-string 0 (match-end 1))
1879 (t (substitute-in-file-name
1880 (concat (substring file-string 0 (match-end 1))
1882 (t (concat (file-name-directory
1883 (substitute-in-file-name file-string)) string))))
1886 (cond ((stringp (setq result (and (file-exists-p (expand-file-name file))
1887 (read-file-name-internal
1889 (expand-file-name file)
1895 (defun mouse-file-display-completion-list (window dir minibuf user-data)
1896 (let ((standard-output (window-buffer window)))
1898 (display-completion-list
1899 (directory-files dir nil nil nil t)
1900 :window-width (* 2 (window-width window))
1902 'mouse-read-file-name-activate-callback
1903 :user-data user-data
1904 :reference-buffer minibuf
1908 (defun mouse-directory-display-completion-list (window dir minibuf user-data)
1909 (let ((standard-output (window-buffer window)))
1911 (display-completion-list
1912 (delete "." (directory-files dir nil nil nil 1))
1913 :window-width (window-width window)
1915 'mouse-read-file-name-activate-callback
1916 :user-data user-data
1917 :reference-buffer minibuf
1921 (defun mouse-read-file-name-activate-callback (event extent user-data)
1922 (let* ((file (extent-string extent))
1923 (minibuf (symbol-value-in-buffer 'completion-reference-buffer
1924 (extent-object extent)))
1925 (in-dir (buffer-substring nil nil minibuf))
1926 (full (expand-file-name file in-dir))
1927 (filebuf (nth 0 user-data))
1928 (dirbuff (nth 1 user-data))
1929 (filewin (nth 2 user-data))
1930 (dirwin (nth 3 user-data)))
1931 (if (file-regular-p full)
1932 (default-choose-completion event extent minibuf)
1933 (erase-buffer minibuf)
1934 (insert-string (file-name-as-directory
1935 (abbreviate-file-name full t)) minibuf)
1936 (reset-buffer filebuf)
1938 (mouse-directory-display-completion-list filewin full minibuf
1940 (mouse-file-display-completion-list filewin full minibuf user-data)
1941 (reset-buffer dirbuff)
1942 (mouse-directory-display-completion-list dirwin full minibuf
1945 ;; this is rather cheesified but gets the job done.
1946 (defun mouse-read-file-name-1 (history prompt dir default
1947 must-match initial-contents
1949 (let* ((file-p (eq 'read-file-name-internal completer))
1950 (filebuf (get-buffer-create "*Completions*"))
1951 (dirbuff (and file-p (generate-new-buffer " *mouse-read-file*")))
1952 (butbuff (generate-new-buffer " *mouse-read-file*"))
1953 (frame (make-dialog-frame))
1958 (reset-buffer filebuf)
1959 (select-frame frame)
1960 (let ((window-min-height 1))
1961 ;; #### should be 2 not 3, but that causes
1962 ;; "window too small to split" errors for some
1963 ;; people (but not for me ...) There's a more
1964 ;; fundamental bug somewhere.
1965 (split-window nil (- (frame-height frame) 3)))
1968 (split-window-horizontally 16)
1969 (setq filewin (frame-rightmost-window frame)
1970 dirwin (frame-leftmost-window frame))
1971 (set-window-buffer filewin filebuf)
1972 (set-window-buffer dirwin dirbuff))
1973 (setq filewin (frame-highest-window frame))
1974 (set-window-buffer filewin filebuf))
1975 (setq user-data (list filebuf dirbuff filewin dirwin))
1976 (set-window-buffer (frame-lowest-window frame) butbuff)
1977 (set-buffer butbuff)
1979 (setq default-directory dir))
1980 (when (featurep 'scrollbar)
1981 (set-specifier scrollbar-width 0 butbuff))
1983 (insert-gui-button (make-gui-button "OK"
1985 (exit-minibuffer))))
1987 (insert-gui-button (make-gui-button "Cancel"
1989 (abort-recursive-edit))))
1993 (mouse-directory-display-completion-list
1994 filewin dir (current-buffer) user-data)
1995 (mouse-file-display-completion-list filewin dir
1998 (mouse-directory-display-completion-list dirwin dir
2002 (make-local-variable
2003 'completion-display-completion-list-function)
2004 #'(lambda (completions)
2005 (display-completion-list
2009 'mouse-read-file-name-activate-callback
2010 :user-data user-data)))
2012 (remove-hook 'minibuffer-setup-hook rfhookfun)
2016 ;; #### I really need to flesh out the object
2017 ;; hierarchy better to avoid these kludges.
2020 (set-buffer standard-output)
2021 (setq truncate-lines t)))))
2024 (add-hook 'minibuffer-setup-hook rfhookfun)
2025 (add-hook 'completion-setup-hook rfcshookfun)
2026 (read-file-name-2 history prompt dir default
2027 must-match initial-contents
2029 (remove-hook 'minibuffer-setup-hook rfhookfun)
2030 (remove-hook 'completion-setup-hook rfcshookfun))))
2031 (delete-frame frame)
2032 (kill-buffer filebuf)
2033 (kill-buffer butbuff)
2034 (and dirbuff (kill-buffer dirbuff)))))
2036 (defun read-face (prompt &optional must-match)
2037 "Read the name of a face from the minibuffer and return it as a symbol."
2038 (intern (completing-read prompt obarray 'find-face must-match)))
2040 ;; #### - wrong place for this variable? Exactly. We probably want
2041 ;; `color-list' to be a console method, so `tty-color-list' becomes
2042 ;; obsolete, and `read-color-completion-table' conses (mapcar #'list
2043 ;; (color-list)), optionally caching the results.
2045 ;; Ben wanted all of the possibilities from the `configure' script used
2046 ;; here, but I think this is way too many. I already trimmed the R4 variants
2047 ;; and a few obvious losers from the list. --Stig
2048 (defvar x-library-search-path '("/usr/X11R6/lib/X11/"
2049 "/usr/X11R5/lib/X11/"
2050 "/usr/lib/X11R6/X11/"
2051 "/usr/lib/X11R5/X11/"
2052 "/usr/local/X11R6/lib/X11/"
2053 "/usr/local/X11R5/lib/X11/"
2054 "/usr/local/lib/X11R6/X11/"
2055 "/usr/local/lib/X11R5/X11/"
2058 "/usr/local/lib/X11/"
2059 "/usr/X386/lib/X11/"
2060 "/usr/x386/lib/X11/"
2061 "/usr/XFree86/lib/X11/"
2062 "/usr/unsupported/lib/X11/"
2063 "/usr/athena/lib/X11/"
2064 "/usr/local/x11r5/lib/X11/"
2065 "/usr/lpp/Xamples/lib/X11/"
2066 "/usr/openwin/lib/X11/"
2067 "/usr/openwin/share/lib/X11/")
2068 "Search path used by `read-color' to find rgb.txt.")
2070 (defvar x-read-color-completion-table)
2072 (defun read-color-completion-table ()
2074 ;; #### Evil device-type dependency
2076 (if (boundp 'x-read-color-completion-table)
2077 x-read-color-completion-table
2078 (let ((rgb-file (locate-file "rgb.txt" x-library-search-path))
2081 ;; prevents multiple searches for rgb.txt if we can't find it
2082 (setq x-read-color-completion-table nil)
2083 (with-current-buffer (get-buffer-create " *colors*")
2084 (reset-buffer (current-buffer))
2085 (insert-file-contents rgb-file)
2087 ;; skip over comments
2088 (while (looking-at "^!")
2091 (skip-chars-forward "0-9 \t")
2094 (setq color (buffer-substring p (point))
2095 clist (cons (list color) clist))
2096 ;; Ugh. If we want to be able to complete the lowercase form
2097 ;; of the color name, we need to add it twice! Yuck.
2098 (let ((dcase (downcase color)))
2099 (or (string= dcase color)
2100 (push (list dcase) clist)))
2102 (kill-buffer (current-buffer))))
2103 (setq x-read-color-completion-table clist)
2104 x-read-color-completion-table)))
2106 (mapcar #'list (mswindows-color-list)))
2108 (mapcar #'list (tty-color-list)))))
2110 (defun read-color (prompt &optional must-match initial-contents)
2111 "Read the name of a color from the minibuffer.
2112 On X devices, this uses `x-library-search-path' to find rgb.txt in order
2113 to build a completion table.
2114 On TTY devices, this uses `tty-color-list'.
2115 On mswindows devices, this uses `mswindows-color-list'."
2116 (let ((table (read-color-completion-table)))
2117 (completing-read prompt table nil (and table must-match)
2121 ;; #### The doc string for read-non-nil-coding system gets lost if we
2122 ;; only include these if the mule feature is present. Strangely,
2123 ;; read-coding-system doesn't.
2125 ;;(if (featurep 'mule)
2127 (defun read-coding-system (prompt &optional default-coding-system)
2128 "Read a coding-system (or nil) from the minibuffer.
2129 Prompting with string PROMPT.
2130 If the user enters null input, return second argument DEFAULT-CODING-SYSTEM.
2131 DEFAULT-CODING-SYSTEM can be a string, symbol, or coding-system object."
2132 (intern (completing-read prompt obarray 'find-coding-system t nil nil
2133 (cond ((symbolp default-coding-system)
2134 (symbol-name default-coding-system))
2135 ((coding-system-p default-coding-system)
2136 (symbol-name (coding-system-name default-coding-system)))
2138 default-coding-system)))))
2140 (defun read-non-nil-coding-system (prompt)
2141 "Read a non-nil coding-system from the minibuffer.
2142 Prompt with string PROMPT."
2143 (let ((retval (intern "")))
2144 (while (= 0 (length (symbol-name retval)))
2145 (setq retval (intern (completing-read prompt obarray
2150 ;;) ;; end of (featurep 'mule)
2154 (defcustom force-dialog-box-use nil
2155 "*If non-nil, always use a dialog box for asking questions, if possible.
2156 You should *bind* this, not set it. This is useful if you're doing
2157 something mousy but which wasn't actually invoked using the mouse."
2161 ;; We include this here rather than dialog.el so it is defined
2162 ;; even when dialog boxes are not present.
2163 (defun should-use-dialog-box-p ()
2164 "If non-nil, questions should be asked with a dialog box instead of the
2165 minibuffer. This looks at `last-command-event' to see if it was a mouse
2166 event, and checks whether dialog-support exists and the current device
2167 supports dialog boxes.
2169 The dialog box is totally disabled if the variable `use-dialog-box'
2171 (and (featurep 'dialog)
2172 (device-on-window-system-p)
2174 (or force-dialog-box-use
2175 (button-press-event-p last-command-event)
2176 (button-release-event-p last-command-event)
2177 (misc-user-event-p last-command-event))))
2179 ;;; minibuf.el ends here