1 ;;; minibuffer.el --- Minibuffer completion functions
3 ;; Copyright (C) 2008 Free Software Foundation, Inc.
5 ;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation, either version 3 of the License, or
12 ;; (at your option) any later version.
14 ;; This program is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with this program. If not, see <http://www.gnu.org/licenses/>.
24 ;; Names starting with "minibuffer--" are for functions and variables that
25 ;; are meant to be for internal use only.
28 ;; - make the `hide-spaces' arg of all-completions obsolete.
31 ;; - envvar completion for file names breaks completion-base-size.
35 (eval-when-compile (require 'cl
))
37 (defvar completion-all-completions-with-base-size nil
38 "If non-nil, `all-completions' may return the base-size in the last cdr.
39 The base-size is the length of the prefix that is elided from each
40 element in the returned list of completions. See `completion-base-size'.")
42 ;;; Completion table manipulation
44 (defun completion--some (fun xs
)
45 "Apply FUN to each element of XS in turn.
46 Return the first non-nil returned value.
49 (while (and (not res
) xs
)
50 (setq res
(funcall fun
(pop xs
))))
53 (defun apply-partially (fun &rest args
)
54 "Do a \"curried\" partial application of FUN to ARGS.
55 ARGS is a list of the first N arguments to pass to FUN.
56 The result is a new function that takes the remaining arguments,
58 (lexical-let ((fun fun
) (args1 args
))
59 (lambda (&rest args2
) (apply fun
(append args1 args2
)))))
61 (defun complete-with-action (action table string pred
)
62 "Perform completion ACTION.
63 STRING is the string to complete.
64 TABLE is the completion table, which should not be a function.
65 PRED is a completion predicate.
66 ACTION can be one of nil, t or `lambda'."
67 ;; (assert (not (functionp table)))
70 ((null action
) 'try-completion
)
71 ((eq action t
) 'all-completions
)
75 (defun completion-table-dynamic (fun)
76 "Use function FUN as a dynamic completion table.
77 FUN is called with one argument, the string for which completion is required,
78 and it should return an alist containing all the intended possible
79 completions. This alist may be a full list of possible completions so that FUN
80 can ignore the value of its argument. If completion is performed in the
81 minibuffer, FUN will be called in the buffer from which the minibuffer was
84 The result of the `dynamic-completion-table' form is a function
85 that can be used as the ALIST argument to `try-completion' and
86 `all-completion'. See Info node `(elisp)Programmed Completion'."
87 (lexical-let ((fun fun
))
88 (lambda (string pred action
)
89 (with-current-buffer (let ((win (minibuffer-selected-window)))
90 (if (window-live-p win
) (window-buffer win
)
92 (complete-with-action action
(funcall fun string
) string pred
)))))
94 (defmacro lazy-completion-table
(var fun
)
95 "Initialize variable VAR as a lazy completion table.
96 If the completion table VAR is used for the first time (e.g., by passing VAR
97 as an argument to `try-completion'), the function FUN is called with no
98 arguments. FUN must return the completion table that will be stored in VAR.
99 If completion is requested in the minibuffer, FUN will be called in the buffer
100 from which the minibuffer was entered. The return value of
101 `lazy-completion-table' must be used to initialize the value of VAR.
103 You should give VAR a non-nil `risky-local-variable' property."
104 (declare (debug (symbolp lambda-expr
)))
105 (let ((str (make-symbol "string")))
106 `(completion-table-dynamic
108 (when (functionp ,var
)
112 (defun completion-table-with-context (prefix table string pred action
)
113 ;; TODO: add `suffix', and think about how we should support `pred'.
114 ;; Notice that `pred' is not a predicate when called from read-file-name
115 ;; or Info-read-node-name-2.
116 ;; (if pred (setq pred (lexical-let ((pred pred))
117 ;; ;; FIXME: this doesn't work if `table' is an obarray.
118 ;; (lambda (s) (funcall pred (concat prefix s))))))
119 (let ((comp (complete-with-action action table string pred
)))
121 ;; In case of try-completion, add the prefix.
122 ((stringp comp
) (concat prefix comp
))
123 ;; In case of non-empty all-completions,
124 ;; add the prefix size to the base-size.
126 (let ((last (last comp
)))
127 (when completion-all-completions-with-base-size
128 (setcdr last
(+ (or (cdr last
) 0) (length prefix
))))
132 (defun completion-table-with-terminator (terminator table string pred action
)
133 (let ((comp (complete-with-action action table string pred
)))
137 (concat string terminator
)
138 (if (and (stringp comp
)
139 (eq (complete-with-action action table comp pred
) t
))
140 (concat comp terminator
)
143 ;; completion-table-with-terminator is always used for
144 ;; "sub-completions" so it's only called if the terminator is missing,
145 ;; in which case `test-completion' should return nil.
146 ((eq action
'lambda
) nil
))))
148 (defun completion-table-in-turn (&rest tables
)
149 "Create a completion table that tries each table in TABLES in turn."
150 (lexical-let ((tables tables
))
151 (lambda (string pred action
)
152 (completion--some (lambda (table)
153 (complete-with-action action table string pred
))
156 (defmacro complete-in-turn
(a b
) `(completion-table-in-turn ,a
,b
))
157 (define-obsolete-function-alias
158 'complete-in-turn
'completion-table-in-turn
"23.1")
160 ;;; Minibuffer completion
162 (defgroup minibuffer nil
163 "Controlling the behavior of the minibuffer."
164 :link
'(custom-manual "(emacs)Minibuffer")
167 (defun minibuffer-message (message &rest args
)
168 "Temporarily display MESSAGE at the end of the minibuffer.
169 The text is displayed for `minibuffer-message-timeout' seconds,
170 or until the next input event arrives, whichever comes first.
171 Enclose MESSAGE in [...] if this is not yet the case.
172 If ARGS are provided, then pass MESSAGE through `format'."
173 ;; Clear out any old echo-area message to make way for our new thing.
175 (unless (and (null args
) (string-match "\\[.+\\]" message
))
176 (setq message
(concat " [" message
"]")))
177 (when args
(setq message
(apply 'format message args
)))
178 (let ((ol (make-overlay (point-max) (point-max) nil t t
)))
181 (unless (zerop (length message
))
182 ;; The current C cursor code doesn't know to use the overlay's
183 ;; marker's stickiness to figure out whether to place the cursor
184 ;; before or after the string, so let's spoon-feed it the pos.
185 (put-text-property 0 1 'cursor t message
))
186 (overlay-put ol
'after-string message
)
187 (sit-for (or minibuffer-message-timeout
1000000)))
188 (delete-overlay ol
))))
190 (defun minibuffer-completion-contents ()
191 "Return the user input in a minibuffer before point as a string.
192 That is what completion commands operate on."
193 (buffer-substring (field-beginning) (point)))
195 (defun delete-minibuffer-contents ()
196 "Delete all user input in a minibuffer.
197 If the current buffer is not a minibuffer, erase its entire contents."
200 (defcustom completion-auto-help t
201 "Non-nil means automatically provide help for invalid completion input.
202 If the value is t the *Completion* buffer is displayed whenever completion
203 is requested but cannot be done.
204 If the value is `lazy', the *Completions* buffer is only displayed after
205 the second failed attempt to complete."
206 :type
'(choice (const nil
) (const t
) (const lazy
))
209 (defvar completion-styles-alist
210 '((basic try-completion all-completions
)
211 ;; (partial-completion
212 ;; completion-pcm--try-completion completion-pcm--all-completions)
214 "List of available completion styles.
215 Each element has the form (NAME TRY-COMPLETION ALL-COMPLETIONS)
216 where NAME is the name that should be used in `completion-styles'
217 TRY-COMPLETION is the function that does the completion, and
218 ALL-COMPLETIONS is the function that lists the completions.")
220 (defcustom completion-styles
'(basic)
221 "List of completion styles to use."
222 :type
`(repeat (choice ,@(mapcar (lambda (x) (list 'const
(car x
)))
223 completion-styles-alist
)))
227 (defun minibuffer-try-completion (string table pred
)
228 (if (and (symbolp table
) (get table
'no-completion-styles
))
229 (try-completion string table pred
)
230 (completion--some (lambda (style)
231 (funcall (nth 1 (assq style completion-styles-alist
))
235 (defun minibuffer-all-completions (string table pred
&optional hide-spaces
)
236 (let ((completion-all-completions-with-base-size t
))
237 (if (and (symbolp table
) (get table
'no-completion-styles
))
238 (all-completions string table pred hide-spaces
)
239 (completion--some (lambda (style)
240 (funcall (nth 2 (assq style completion-styles-alist
))
241 string table pred hide-spaces
))
242 completion-styles
))))
244 (defun minibuffer--bitset (modified completions exact
)
245 (logior (if modified
4 0)
249 (defun minibuffer--do-completion (&optional try-completion-function
)
250 "Do the completion and return a summary of what happened.
251 M = completion was performed, the text was Modified.
252 C = there were available Completions.
253 E = after completion we now have an Exact match.
256 000 0 no possible completion
257 001 1 was already an exact and unique completion
258 010 2 no completion happened
259 011 3 was already an exact completion
262 110 6 some completion happened
263 111 7 completed to an exact completion"
264 (let* ((beg (field-beginning))
265 (string (buffer-substring beg
(point)))
266 (completion (funcall (or try-completion-function
267 'minibuffer-try-completion
)
269 minibuffer-completion-table
270 minibuffer-completion-predicate
)))
273 (ding) (minibuffer-message "No match") (minibuffer--bitset nil nil nil
))
274 ((eq t completion
) (minibuffer--bitset nil nil t
)) ;Exact and unique match.
276 ;; `completed' should be t if some completion was done, which doesn't
277 ;; include simply changing the case of the entered string. However,
278 ;; for appearance, the string is rewritten if the case changes.
279 (let ((completed (not (eq t
(compare-strings completion nil nil
281 (unchanged (eq t
(compare-strings completion nil nil
282 string nil nil nil
))))
284 ;; Merge a trailing / in completion with a / after point.
285 ;; We used to only do it for word completion, but it seems to make
286 ;; sense for all completions.
287 (if (and (eq ?
/ (aref completion
(1- (length completion
))))
288 (< (point) (field-end))
289 (eq ?
/ (char-after)))
290 (setq completion
(substring completion
0 -
1)))
292 ;; Insert in minibuffer the chars we got.
295 (delete-region beg end
)))
297 (if (not (or unchanged completed
))
298 ;; The case of the string changed, but that's all. We're not sure
299 ;; whether this is a unique completion or not, so try again using
300 ;; the real case (this shouldn't recurse again, because the next
301 ;; time try-completion will return either t or the exact string).
302 (minibuffer--do-completion try-completion-function
)
304 ;; It did find a match. Do we match some possibility exactly now?
305 (let ((exact (test-completion (field-string)
306 minibuffer-completion-table
307 minibuffer-completion-predicate
)))
309 ;; Show the completion table, if requested.
312 (if (case completion-auto-help
313 (lazy (eq this-command last-command
))
314 (t completion-auto-help
))
315 (minibuffer-completion-help)
316 (minibuffer-message "Next char not unique")))
317 ;; If the last exact completion and this one were the same,
318 ;; it means we've already given a "Complete but not unique"
319 ;; message and the user's hit TAB again, so now we give him help.
320 ((eq this-command last-command
)
321 (if completion-auto-help
(minibuffer-completion-help)))))
323 (minibuffer--bitset completed t exact
))))))))
325 (defun minibuffer-complete ()
326 "Complete the minibuffer contents as far as possible.
327 Return nil if there is no valid completion, else t.
328 If no characters can be completed, display a list of possible completions.
329 If you repeat this command after it displayed such a list,
330 scroll the window of possible completions."
332 ;; If the previous command was not this,
333 ;; mark the completion buffer obsolete.
334 (unless (eq this-command last-command
)
335 (setq minibuffer-scroll-window nil
))
337 (let ((window minibuffer-scroll-window
))
338 ;; If there's a fresh completion window with a live buffer,
339 ;; and this command is repeated, scroll that window.
340 (if (window-live-p window
)
341 (with-current-buffer (window-buffer window
)
342 (if (pos-visible-in-window-p (point-max) window
)
343 ;; If end is in view, scroll up to the beginning.
344 (set-window-start window
(point-min) nil
)
345 ;; Else scroll down one screen.
346 (scroll-other-window))
349 (case (minibuffer--do-completion)
351 (1 (goto-char (field-end))
352 (minibuffer-message "Sole completion")
354 (3 (goto-char (field-end))
355 (minibuffer-message "Complete, but not unique")
359 (defun minibuffer-complete-and-exit ()
360 "If the minibuffer contents is a valid completion then exit.
361 Otherwise try to complete it. If completion leads to a valid completion,
362 a repetition of this command will exit."
365 ;; Allow user to specify null string
366 ((= (field-beginning) (field-end)) (exit-minibuffer))
367 ((test-completion (field-string)
368 minibuffer-completion-table
369 minibuffer-completion-predicate
)
370 (when completion-ignore-case
371 ;; Fixup case of the field, if necessary.
372 (let* ((string (field-string))
373 (compl (minibuffer-try-completion
375 minibuffer-completion-table
376 minibuffer-completion-predicate
)))
377 (when (and (stringp compl
)
378 ;; If it weren't for this piece of paranoia, I'd replace
379 ;; the whole thing with a call to complete-do-completion.
380 (= (length string
) (length compl
)))
381 (let ((beg (field-beginning))
385 (delete-region beg end
)))))
388 ((eq minibuffer-completion-confirm
'confirm-only
)
389 ;; The user is permitted to exit with an input that's rejected
390 ;; by test-completion, but at the condition to confirm her choice.
391 (if (eq last-command this-command
)
393 (minibuffer-message "Confirm")
397 ;; Call do-completion, but ignore errors.
398 (case (condition-case nil
399 (minibuffer--do-completion)
401 ((1 3) (exit-minibuffer))
402 (7 (if (not minibuffer-completion-confirm
)
404 (minibuffer-message "Confirm")
408 (defun minibuffer-try-word-completion (string table predicate
)
409 (let ((completion (minibuffer-try-completion string table predicate
)))
410 (if (not (stringp completion
))
413 ;; Completing a single word is actually more difficult than completing
414 ;; as much as possible, because we first have to find the "current
415 ;; position" in `completion' in order to find the end of the word
416 ;; we're completing. Normally, `string' is a prefix of `completion',
417 ;; which makes it trivial to find the position, but with fancier
418 ;; completion (plus env-var expansion, ...) `completion' might not
419 ;; look anything like `string' at all.
421 (when minibuffer-completing-file-name
422 ;; In order to minimize the problem mentioned above, let's try to
423 ;; reduce the different between `string' and `completion' by
424 ;; mirroring some of the work done in read-file-name-internal.
425 (let ((substituted (condition-case nil
426 ;; Might fail when completing an env-var.
427 (substitute-in-file-name string
)
429 (unless (eq string substituted
)
430 (setq string substituted
))))
432 ;; Make buffer (before point) contain the longest match
433 ;; of `string's tail and `completion's head.
434 (let* ((startpos (max 0 (- (length string
) (length completion
))))
435 (length (- (length string
) startpos
)))
436 (while (and (> length
0)
437 (not (eq t
(compare-strings string startpos nil
439 completion-ignore-case
))))
440 (setq startpos
(1+ startpos
))
441 (setq length
(1- length
)))
443 (setq string
(substring string startpos
)))
445 ;; Now `string' is a prefix of `completion'.
447 ;; If completion finds next char not unique,
448 ;; consider adding a space or a hyphen.
449 (when (= (length string
) (length completion
))
450 (let ((exts '(" " "-"))
452 (while (and exts
(not (stringp tem
)))
453 (setq tem
(minibuffer-try-completion (concat string
(pop exts
))
455 (if (stringp tem
) (setq completion tem
))))
457 ;; Otherwise cut after the first word.
458 (if (string-match "\\W" completion
(length string
))
459 ;; First find first word-break in the stuff found by completion.
460 ;; i gets index in string of where to stop completing.
461 (substring completion
0 (match-end 0))
465 (defun minibuffer-complete-word ()
466 "Complete the minibuffer contents at most a single word.
467 After one word is completed as much as possible, a space or hyphen
468 is added, provided that matches some possible completion.
469 Return nil if there is no valid completion, else t."
471 (case (minibuffer--do-completion 'minibuffer-try-word-completion
)
473 (1 (goto-char (field-end))
474 (minibuffer-message "Sole completion")
476 (3 (goto-char (field-end))
477 (minibuffer-message "Complete, but not unique")
481 (defun minibuffer--insert-strings (strings)
482 "Insert a list of STRINGS into the current buffer.
483 Uses columns to keep the listing readable but compact.
484 It also eliminates runs of equal strings."
485 (when (consp strings
)
486 (let* ((length (apply 'max
489 (+ (length (car s
)) (length (cadr s
)))
492 (window (get-buffer-window (current-buffer) 0))
493 (wwidth (if window
(1- (window-width window
)) 79))
495 ;; At least 2 columns; at least 2 spaces between columns.
496 (max 2 (/ wwidth
(+ 2 length
)))
497 ;; Don't allocate more columns than we can fill.
498 ;; Windows can't show less than 3 lines anyway.
499 (max 1 (/ (length strings
) 2))))
500 (colwidth (/ wwidth columns
))
503 ;; The insertion should be "sensible" no matter what choices were made
504 ;; for the parameters above.
505 (dolist (str strings
)
506 (unless (equal laststring str
) ; Remove (consecutive) duplicates.
507 (setq laststring str
)
510 (setq column
(+ column colwidth
))
511 ;; Leave the space unpropertized so that in the case we're
512 ;; already past the goal column, there is still
513 ;; a space displayed.
514 (set-text-properties (- (point) 1) (point)
515 ;; We can't just set tab-width, because
516 ;; completion-setup-function will kill all
517 ;; local variables :-(
518 `(display (space :align-to
,column
))))
519 (when (< wwidth
(+ (max colwidth
521 (+ (length (car str
)) (length (cadr str
)))
524 (delete-char -
2) (insert "\n") (setq column
0))
525 (if (not (consp str
))
526 (put-text-property (point) (progn (insert str
) (point))
527 'mouse-face
'highlight
)
528 (put-text-property (point) (progn (insert (car str
)) (point))
529 'mouse-face
'highlight
)
530 (put-text-property (point) (progn (insert (cadr str
)) (point))
531 'mouse-face nil
)))))))
533 (defvar completion-common-substring
)
535 (defvar completion-setup-hook nil
536 "Normal hook run at the end of setting up a completion list buffer.
537 When this hook is run, the current buffer is the one in which the
538 command to display the completion list buffer was run.
539 The completion list buffer is available as the value of `standard-output'.
540 The common prefix substring for completion may be available as the
541 value of `completion-common-substring'. See also `display-completion-list'.")
543 (defun display-completion-list (completions &optional common-substring
)
544 "Display the list of completions, COMPLETIONS, using `standard-output'.
545 Each element may be just a symbol or string
546 or may be a list of two strings to be printed as if concatenated.
547 If it is a list of two strings, the first is the actual completion
548 alternative, the second serves as annotation.
549 `standard-output' must be a buffer.
550 The actual completion alternatives, as inserted, are given `mouse-face'
551 properties of `highlight'.
552 At the end, this runs the normal hook `completion-setup-hook'.
553 It can find the completion buffer in `standard-output'.
554 The optional second arg COMMON-SUBSTRING is a string.
555 It is used to put faces, `completions-first-difference' and
556 `completions-common-part' on the completion buffer. The
557 `completions-common-part' face is put on the common substring
558 specified by COMMON-SUBSTRING. If COMMON-SUBSTRING is nil
559 and the current buffer is not the minibuffer, the faces are not put.
560 Internally, COMMON-SUBSTRING is bound to `completion-common-substring'
561 during running `completion-setup-hook'."
562 (if (not (bufferp standard-output
))
563 ;; This *never* (ever) happens, so there's no point trying to be clever.
565 (let ((standard-output (current-buffer))
566 (completion-setup-hook nil
))
567 (display-completion-list completions
))
568 (princ (buffer-string)))
570 (with-current-buffer standard-output
571 (goto-char (point-max))
572 (if (null completions
)
573 (insert "There are no possible completions of what you have typed.")
575 (insert "Possible completions are:\n")
576 (let ((last (last completions
)))
577 ;; Get the base-size from the tail of the list.
578 (set (make-local-variable 'completion-base-size
) (or (cdr last
) 0))
579 (setcdr last nil
)) ;Make completions a properly nil-terminated list.
580 (minibuffer--insert-strings completions
))))
582 (let ((completion-common-substring common-substring
))
583 (run-hooks 'completion-setup-hook
))
586 (defun minibuffer-completion-help ()
587 "Display a list of possible completions of the current minibuffer contents."
589 (message "Making completion list...")
590 (let* ((string (field-string))
591 (completions (minibuffer-all-completions
593 minibuffer-completion-table
594 minibuffer-completion-predicate
598 (or (consp (cdr completions
))
599 (not (equal (car completions
) string
))))
600 (with-output-to-temp-buffer "*Completions*"
601 (let* ((last (last completions
))
602 (base-size (cdr last
)))
603 ;; Remove the base-size tail because `sort' requires a properly
604 ;; nil-terminated list.
605 (when last
(setcdr last nil
))
606 (display-completion-list (nconc (sort completions
'string-lessp
)
609 ;; If there are no completions, or if the current input is already the
610 ;; only possible completion, then hide (previous&stale) completions.
611 (let ((window (and (get-buffer "*Completions*")
612 (get-buffer-window "*Completions*" 0))))
613 (when (and (window-live-p window
) (window-dedicated-p window
))
615 (delete-window window
)
616 (error (iconify-frame (window-frame window
))))))
619 (if completions
"Sole completion" "No completions")))
622 (defun exit-minibuffer ()
623 "Terminate this minibuffer argument."
625 ;; If the command that uses this has made modifications in the minibuffer,
626 ;; we don't want them to cause deactivation of the mark in the original
628 ;; A better solution would be to make deactivate-mark buffer-local
629 ;; (or to turn it into a list of buffers, ...), but in the mean time,
630 ;; this should do the trick in most cases.
631 (setq deactivate-mark nil
)
634 (defun self-insert-and-exit ()
635 "Terminate minibuffer input."
637 (if (characterp last-command-char
)
638 (call-interactively 'self-insert-command
)
642 (defun minibuffer--double-dollars (str)
643 (replace-regexp-in-string "\\$" "$$" str
))
645 (defun completion--make-envvar-table ()
646 (mapcar (lambda (enventry)
647 (substring enventry
0 (string-match "=" enventry
)))
648 process-environment
))
650 (defun completion--embedded-envvar-table (string pred action
)
651 (when (string-match (concat "\\(?:^\\|[^$]\\(?:\\$\\$\\)*\\)"
652 "$\\([[:alnum:]_]*\\|{\\([^}]*\\)\\)\\'")
654 (let* ((beg (or (match-beginning 2) (match-beginning 1)))
655 (table (completion--make-envvar-table))
656 (prefix (substring string
0 beg
)))
657 (if (eq (aref string
(1- beg
)) ?
{)
658 (setq table
(apply-partially 'completion-table-with-terminator
660 (completion-table-with-context prefix table
661 (substring string beg
)
664 (defun completion--file-name-table (string dir action
)
665 "Internal subroutine for read-file-name. Do not call this."
666 (setq dir
(expand-file-name dir
))
667 (if (and (zerop (length string
)) (eq 'lambda action
))
669 (let* ((str (condition-case nil
670 (substitute-in-file-name string
)
672 (name (file-name-nondirectory str
))
673 (specdir (file-name-directory str
))
674 (realdir (if specdir
(expand-file-name specdir dir
)
675 (file-name-as-directory dir
))))
679 (let ((comp (file-name-completion name realdir
680 read-file-name-predicate
)))
682 ;; Requote the $s before returning the completion.
683 (minibuffer--double-dollars (concat specdir comp
))
684 ;; Requote the $s before checking for changes.
685 (setq str
(minibuffer--double-dollars str
))
686 (if (string-equal string str
)
688 ;; If there's no real completion, but substitute-in-file-name
689 ;; changed the string, then return the new string.
693 (let ((all (file-name-all-completions name realdir
))
694 ;; Actually, this is not always right in the presence of
695 ;; envvars, but there's not much we can do, I think.
696 (base-size (length (file-name-directory string
))))
698 ;; Check the predicate, if necessary.
699 (unless (memq read-file-name-predicate
'(nil file-exists-p
))
702 (if (eq read-file-name-predicate
'file-directory-p
)
703 ;; Brute-force speed up for directory checking:
704 ;; Discard strings which don't end in a slash.
706 (let ((len (length s
)))
707 (and (> len
0) (eq (aref s
(1- len
)) ?
/))))
708 ;; Must do it the hard (and slow) way.
709 read-file-name-predicate
)))
710 (let ((default-directory realdir
))
712 (if (funcall pred tem
) (push tem comp
))))
713 (setq all
(nreverse comp
))))
715 (if (and completion-all-completions-with-base-size
(consp all
))
716 ;; Add base-size, but only if the list is non-empty.
717 (nconc all base-size
))
722 ;; Only other case actually used is ACTION = lambda.
723 (let ((default-directory dir
))
724 (funcall (or read-file-name-predicate
'file-exists-p
) str
)))))))
726 (defalias 'read-file-name-internal
727 (completion-table-in-turn 'completion--embedded-envvar-table
728 'completion--file-name-table
)
729 "Internal subroutine for `read-file-name'. Do not call this.")
731 (provide 'minibuffer
)
732 ;;; minibuffer.el ends here