(cvs-vc-command-advice): Handle the case where args
[emacs.git] / lisp / complete.el
blobde58752b63617d890c6b98845cb514b137178722
1 ;;; complete.el --- partial completion mechanism plus other goodies
3 ;; Copyright (C) 1990, 1991, 1992, 1993, 1999, 2000
4 ;; Free Software Foundation, Inc.
6 ;; Author: Dave Gillespie <daveg@synaptics.com>
7 ;; Keywords: abbrev convenience
8 ;; Special thanks to Hallvard Furuseth for his many ideas and contributions.
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; any later version.
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
27 ;;; Commentary:
29 ;; Extended completion for the Emacs minibuffer.
31 ;; The basic idea is that the command name or other completable text is
32 ;; divided into words and each word is completed separately, so that
33 ;; "M-x p-b" expands to "M-x print-buffer". If the entry is ambiguous
34 ;; each word is completed as much as possible and then the cursor is
35 ;; left at the first position where typing another letter will resolve
36 ;; the ambiguity.
38 ;; Word separators for this purpose are hyphen, space, and period.
39 ;; These would most likely occur in command names, Info menu items,
40 ;; and file names, respectively. But all word separators are treated
41 ;; alike at all times.
43 ;; This completion package replaces the old-style completer's key
44 ;; bindings for TAB, SPC, RET, and `?'. The old completer is still
45 ;; available on the Meta versions of those keys. If you set
46 ;; PC-meta-flag to nil, the old completion keys will be left alone
47 ;; and the partial completer will use the Meta versions of the keys.
50 ;; Usage: M-x partial-completion-mode. During completable minibuffer entry,
52 ;; TAB means to do a partial completion;
53 ;; SPC means to do a partial complete-word;
54 ;; RET means to do a partial complete-and-exit;
55 ;; ? means to do a partial completion-help.
57 ;; If you set PC-meta-flag to nil, then TAB, SPC, RET, and ? perform
58 ;; original Emacs completions, and M-TAB etc. do partial completion.
59 ;; To do this, put the command,
61 ;; (setq PC-meta-flag nil)
63 ;; in your .emacs file. To load partial completion automatically, put
65 ;; (partial-completion-mode t)
67 ;; in your .emacs file, too. Things will be faster if you byte-compile
68 ;; this file when you install it.
70 ;; As an extra feature, in cases where RET would not normally
71 ;; complete (such as `C-x b'), the M-RET key will always do a partial
72 ;; complete-and-exit. Thus `C-x b f.c RET' will select or create a
73 ;; buffer called "f.c", but `C-x b f.c M-RET' will select the existing
74 ;; buffer whose name matches that pattern (perhaps "filing.c").
75 ;; (PC-meta-flag does not affect this behavior; M-RET used to be
76 ;; undefined in this situation.)
78 ;; The regular M-TAB (lisp-complete-symbol) command also supports
79 ;; partial completion in this package.
81 ;; File name completion does not do partial completion of directories
82 ;; on the path, e.g., "/u/b/f" will not complete to "/usr/bin/foo",
83 ;; but you can put *'s in the path to accomplish this: "/u*/b*/f".
84 ;; Stars are required for performance reasons.
86 ;; In addition, this package includes a feature for accessing include
87 ;; files. For example, `C-x C-f <sys/time.h> RET' reads the file
88 ;; /usr/include/sys/time.h. The variable PC-include-file-path is a
89 ;; list of directories in which to search for include files. Completion
90 ;; is supported in include file names.
93 ;;; Code:
95 (defgroup partial-completion nil
96 "Partial Completion of items."
97 :prefix "pc-"
98 :group 'minibuffer
99 :group 'convenience)
101 (defcustom PC-first-char 'find-file
102 "*Control how the first character of a string is to be interpreted.
103 If nil, the first character of a string is not taken literally if it is a word
104 delimiter, so that \".e\" matches \"*.e*\".
105 If t, the first character of a string is always taken literally even if it is a
106 word delimiter, so that \".e\" matches \".e*\".
107 If non-nil and non-t, the first character is taken literally only for file name
108 completion."
109 :type '(choice (const :tag "delimiter" nil)
110 (const :tag "literal" t)
111 (other :tag "find-file" find-file))
112 :group 'partial-completion)
114 (defcustom PC-meta-flag t
115 "*If non-nil, TAB means PC completion and M-TAB means normal completion.
116 Otherwise, TAB means normal completion and M-TAB means Partial Completion."
117 :type 'boolean
118 :group 'partial-completion)
120 (defcustom PC-word-delimiters "-_. "
121 "*A string of characters treated as word delimiters for completion.
122 Some arcane rules:
123 If `]' is in this string, it must come first.
124 If `^' is in this string, it must not come first.
125 If `-' is in this string, it must come first or right after `]'.
126 In other words, if S is this string, then `[S]' must be a legal Emacs regular
127 expression (not containing character ranges like `a-z')."
128 :type 'string
129 :group 'partial-completion)
131 (defcustom PC-include-file-path '("/usr/include" "/usr/local/include")
132 "*A list of directories in which to look for include files.
133 If nil, means use the colon-separated path in the variable $INCPATH instead."
134 :type '(repeat directory)
135 :group 'partial-completion)
137 (defcustom PC-disable-includes nil
138 "*If non-nil, include-file support in \\[find-file] is disabled."
139 :type 'boolean
140 :group 'partial-completion)
142 (defvar PC-default-bindings t
143 "If non-nil, default partial completion key bindings are suppressed.")
145 (defvar PC-env-vars-alist nil
146 "A list of the environment variable names and values.")
149 (defvar PC-old-read-file-name-internal nil)
151 (defun PC-bindings (bind)
152 (let ((completion-map minibuffer-local-completion-map)
153 (must-match-map minibuffer-local-must-match-map))
154 (cond ((not bind)
155 ;; These bindings are the default bindings. It would be better to
156 ;; restore the previous bindings.
157 (define-key completion-map "\t" 'minibuffer-complete)
158 (define-key completion-map " " 'minibuffer-complete-word)
159 (define-key completion-map "?" 'minibuffer-completion-help)
161 (define-key must-match-map "\t" 'minibuffer-complete)
162 (define-key must-match-map " " 'minibuffer-complete-word)
163 (define-key must-match-map "\r" 'minibuffer-complete-and-exit)
164 (define-key must-match-map "\n" 'minibuffer-complete-and-exit)
165 (define-key must-match-map "?" 'minibuffer-completion-help)
167 (define-key global-map "\e\t" 'complete-symbol))
168 (PC-default-bindings
169 (define-key completion-map "\t" 'PC-complete)
170 (define-key completion-map " " 'PC-complete-word)
171 (define-key completion-map "?" 'PC-completion-help)
173 (define-key completion-map "\e\t" 'PC-complete)
174 (define-key completion-map "\e " 'PC-complete-word)
175 (define-key completion-map "\e\r" 'PC-force-complete-and-exit)
176 (define-key completion-map "\e\n" 'PC-force-complete-and-exit)
177 (define-key completion-map "\e?" 'PC-completion-help)
179 (define-key must-match-map "\t" 'PC-complete)
180 (define-key must-match-map " " 'PC-complete-word)
181 (define-key must-match-map "\r" 'PC-complete-and-exit)
182 (define-key must-match-map "\n" 'PC-complete-and-exit)
183 (define-key must-match-map "?" 'PC-completion-help)
185 (define-key must-match-map "\e\t" 'PC-complete)
186 (define-key must-match-map "\e " 'PC-complete-word)
187 (define-key must-match-map "\e\r" 'PC-complete-and-exit)
188 (define-key must-match-map "\e\n" 'PC-complete-and-exit)
189 (define-key must-match-map "\e?" 'PC-completion-help)
191 (define-key global-map "\e\t" 'PC-lisp-complete-symbol)))))
193 ;;;###autoload
194 (define-minor-mode partial-completion-mode
195 "Toggle Partial Completion mode.
196 With prefix ARG, turn Partial Completion mode on if ARG is positive.
198 When Partial Completion mode is enabled, TAB (or M-TAB if `PC-meta-flag' is
199 nil) is enhanced so that if some string is divided into words and each word is
200 delimited by a character in `PC-word-delimiters', partial words are completed
201 as much as possible and `*' characters are treated likewise in file names.
203 For example, M-x p-c-m expands to M-x partial-completion-mode since no other
204 command begins with that sequence of characters, and
205 \\[find-file] f_b.c TAB might complete to foo_bar.c if that file existed and no
206 other file in that directory begin with that sequence of characters.
208 Unless `PC-disable-includes' is non-nil, the `<...>' sequence is interpreted
209 specially in \\[find-file]. For example,
210 \\[find-file] <sys/time.h> RET finds the file `/usr/include/sys/time.h'.
211 See also the variable `PC-include-file-path'."
212 :global t :group 'partial-completion
213 ;; Deal with key bindings...
214 (PC-bindings partial-completion-mode)
215 ;; Deal with include file feature...
216 (cond ((not partial-completion-mode)
217 (remove-hook 'find-file-not-found-hooks 'PC-look-for-include-file))
218 ((not PC-disable-includes)
219 (add-hook 'find-file-not-found-hooks 'PC-look-for-include-file)))
220 ;; ... with some underhand redefining.
221 (cond ((and (not partial-completion-mode)
222 (functionp PC-old-read-file-name-internal))
223 (fset 'read-file-name-internal PC-old-read-file-name-internal))
224 ((and (not PC-disable-includes) (not PC-old-read-file-name-internal))
225 (setq PC-old-read-file-name-internal
226 (symbol-function 'read-file-name-internal))
227 (fset 'read-file-name-internal
228 'PC-read-include-file-name-internal)))
229 (when (and partial-completion-mode (null PC-env-vars-alist))
230 (setq PC-env-vars-alist
231 (mapcar (lambda (string)
232 (let ((d (string-match "=" string)))
233 (cons (concat "$" (substring string 0 d))
234 (and d (substring string (1+ d))))))
235 process-environment))))
238 (defun PC-complete ()
239 "Like minibuffer-complete, but allows \"b--di\"-style abbreviations.
240 For example, \"M-x b--di\" would match `byte-recompile-directory', or any
241 name which consists of three or more words, the first beginning with \"b\"
242 and the third beginning with \"di\".
244 The pattern \"b--d\" is ambiguous for `byte-recompile-directory' and
245 `beginning-of-defun', so this would produce a list of completions
246 just like when normal Emacs completions are ambiguous.
248 Word-delimiters for the purposes of Partial Completion are \"-\", \"_\",
249 \".\", and SPC."
250 (interactive)
251 (if (PC-was-meta-key)
252 (minibuffer-complete)
253 ;; If the previous command was not this one,
254 ;; never scroll, always retry completion.
255 (or (eq last-command this-command)
256 (setq minibuffer-scroll-window nil))
257 (let ((window minibuffer-scroll-window))
258 ;; If there's a fresh completion window with a live buffer,
259 ;; and this command is repeated, scroll that window.
260 (if (and window (window-buffer window)
261 (buffer-name (window-buffer window)))
262 (save-excursion
263 (set-buffer (window-buffer window))
264 (if (pos-visible-in-window-p (point-max) window)
265 (set-window-start window (point-min) nil)
266 (scroll-other-window)))
267 (PC-do-completion nil)))))
270 (defun PC-complete-word ()
271 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
272 See `PC-complete' for details.
273 This can be bound to other keys, like `-' and `.', if you wish."
274 (interactive)
275 (if (eq (PC-was-meta-key) PC-meta-flag)
276 (if (eq last-command-char ? )
277 (minibuffer-complete-word)
278 (self-insert-command 1))
279 (self-insert-command 1)
280 (if (eobp)
281 (PC-do-completion 'word))))
284 (defun PC-complete-space ()
285 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
286 See `PC-complete' for details.
287 This is suitable for binding to other keys which should act just like SPC."
288 (interactive)
289 (if (eq (PC-was-meta-key) PC-meta-flag)
290 (minibuffer-complete-word)
291 (insert " ")
292 (if (eobp)
293 (PC-do-completion 'word))))
296 (defun PC-complete-and-exit ()
297 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
298 See `PC-complete' for details."
299 (interactive)
300 (if (eq (PC-was-meta-key) PC-meta-flag)
301 (minibuffer-complete-and-exit)
302 (PC-do-complete-and-exit)))
304 (defun PC-force-complete-and-exit ()
305 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
306 See `PC-complete' for details."
307 (interactive)
308 (let ((minibuffer-completion-confirm nil))
309 (PC-do-complete-and-exit)))
311 (defun PC-do-complete-and-exit ()
312 (if (= (point-max) (minibuffer-prompt-end)) ; Duplicate the "bug" that Info-menu relies on...
313 (exit-minibuffer)
314 (let ((flag (PC-do-completion 'exit)))
315 (and flag
316 (if (or (eq flag 'complete)
317 (not minibuffer-completion-confirm))
318 (exit-minibuffer)
319 (PC-temp-minibuffer-message " [Confirm]"))))))
322 (defun PC-completion-help ()
323 "Like `minibuffer-completion-help', but allows \"b--di\"-style abbreviations.
324 See `PC-complete' for details."
325 (interactive)
326 (if (eq (PC-was-meta-key) PC-meta-flag)
327 (minibuffer-completion-help)
328 (PC-do-completion 'help)))
330 (defun PC-was-meta-key ()
331 (or (/= (length (this-command-keys)) 1)
332 (let ((key (aref (this-command-keys) 0)))
333 (if (integerp key)
334 (>= key 128)
335 (not (null (memq 'meta (event-modifiers key))))))))
338 (defvar PC-ignored-extensions 'empty-cache)
339 (defvar PC-delims 'empty-cache)
340 (defvar PC-ignored-regexp nil)
341 (defvar PC-word-failed-flag nil)
342 (defvar PC-delim-regex nil)
343 (defvar PC-ndelims-regex nil)
344 (defvar PC-delims-list nil)
346 (defvar PC-completion-as-file-name-predicate
347 (function
348 (lambda ()
349 (memq minibuffer-completion-table
350 '(read-file-name-internal read-directory-name-internal))))
351 "A function testing whether a minibuffer completion now will work filename-style.
352 The function takes no arguments, and typically looks at the value
353 of `minibuffer-completion-table' and the minibuffer contents.")
355 (defun PC-do-completion (&optional mode beg end)
356 (or beg (setq beg (minibuffer-prompt-end)))
357 (or end (setq end (point-max)))
358 (let* ((table minibuffer-completion-table)
359 (pred minibuffer-completion-predicate)
360 (filename (funcall PC-completion-as-file-name-predicate))
361 (dirname nil)
362 (dirlength 0)
363 (str (buffer-substring beg end))
364 (incname (and filename (string-match "<\\([^\"<>]*\\)>?$" str)))
365 (ambig nil)
366 basestr
367 env-on
368 regex
369 p offset
370 (poss nil)
371 helpposs
372 (case-fold-search completion-ignore-case))
374 ;; Check if buffer contents can already be considered complete
375 (if (and (eq mode 'exit)
376 (PC-is-complete-p str table pred))
377 'complete
379 ;; Do substitutions in directory names
380 (and filename
381 (setq basestr (or (file-name-directory str) ""))
382 (setq dirlength (length basestr))
383 ;; Do substitutions in directory names
384 (setq p (substitute-in-file-name basestr))
385 (not (string-equal basestr p))
386 (setq str (concat p (file-name-nondirectory str)))
387 (progn
388 (delete-region beg end)
389 (insert str)
390 (setq end (+ beg (length str)))))
392 ;; Prepare various delimiter strings
393 (or (equal PC-word-delimiters PC-delims)
394 (setq PC-delims PC-word-delimiters
395 PC-delim-regex (concat "[" PC-delims "]")
396 PC-ndelims-regex (concat "[^" PC-delims "]*")
397 PC-delims-list (append PC-delims nil)))
399 ;; Look for wildcard expansions in directory name
400 (and filename
401 (string-match "\\*.*/" str)
402 (let ((pat str)
403 files)
404 (setq p (1+ (string-match "/[^/]*\\'" pat)))
405 (while (setq p (string-match PC-delim-regex pat p))
406 (setq pat (concat (substring pat 0 p)
408 (substring pat p))
409 p (+ p 2)))
410 (setq files (PC-expand-many-files (concat pat "*")))
411 (if files
412 (let ((dir (file-name-directory (car files)))
413 (p files))
414 (while (and (setq p (cdr p))
415 (equal dir (file-name-directory (car p)))))
416 (if p
417 (setq filename nil table nil pred nil
418 ambig t)
419 (delete-region beg end)
420 (setq str (concat dir (file-name-nondirectory str)))
421 (insert str)
422 (setq end (+ beg (length str)))))
423 (setq filename nil table nil pred nil))))
425 ;; Strip directory name if appropriate
426 (if filename
427 (if incname
428 (setq basestr (substring str incname)
429 dirname (substring str 0 incname))
430 (setq basestr (file-name-nondirectory str)
431 dirname (file-name-directory str))
432 ;; Make sure str is consistent with its directory and basename
433 ;; parts. This is important on DOZe'NT systems when str only
434 ;; includes a drive letter, like in "d:".
435 (setq str (concat dirname basestr)))
436 (setq basestr str))
438 ;; Convert search pattern to a standard regular expression
439 (setq regex (regexp-quote basestr)
440 offset (if (and (> (length regex) 0)
441 (not (eq (aref basestr 0) ?\*))
442 (or (eq PC-first-char t)
443 (and PC-first-char filename))) 1 0)
444 p offset)
445 (while (setq p (string-match PC-delim-regex regex p))
446 (if (eq (aref regex p) ? )
447 (setq regex (concat (substring regex 0 p)
448 PC-ndelims-regex
449 PC-delim-regex
450 (substring regex (1+ p)))
451 p (+ p (length PC-ndelims-regex) (length PC-delim-regex)))
452 (let ((bump (if (memq (aref regex p)
453 '(?$ ?^ ?\. ?* ?+ ?? ?[ ?] ?\\))
454 -1 0)))
455 (setq regex (concat (substring regex 0 (+ p bump))
456 PC-ndelims-regex
457 (substring regex (+ p bump)))
458 p (+ p (length PC-ndelims-regex) 1)))))
459 (setq p 0)
460 (if filename
461 (while (setq p (string-match "\\\\\\*" regex p))
462 (setq regex (concat (substring regex 0 p)
463 "[^/]*"
464 (substring regex (+ p 2))))))
465 ;;(setq the-regex regex)
466 (setq regex (concat "\\`" regex))
468 (and (> (length basestr) 0)
469 (= (aref basestr 0) ?$)
470 (setq env-on t
471 table PC-env-vars-alist
472 pred nil))
474 ;; Find an initial list of possible completions
475 (if (not (setq p (string-match (concat PC-delim-regex
476 (if filename "\\|\\*" ""))
478 (+ (length dirname) offset))))
480 ;; Minibuffer contains no hyphens -- simple case!
481 (setq poss (all-completions (if env-on
482 basestr str)
483 table
484 pred))
486 ;; Use all-completions to do an initial cull. This is a big win,
487 ;; since all-completions is written in C!
488 (let ((compl (all-completions (if env-on
489 (file-name-nondirectory (substring str 0 p))
490 (substring str 0 p))
491 table
492 pred)))
493 (setq p compl)
494 (while p
495 (and (string-match regex (car p))
496 (progn
497 (set-text-properties 0 (length (car p)) '() (car p))
498 (setq poss (cons (car p) poss))))
499 (setq p (cdr p)))))
501 ;; Now we have a list of possible completions
502 (cond
504 ;; No valid completions found
505 ((null poss)
506 (if (and (eq mode 'word)
507 (not PC-word-failed-flag))
508 (let ((PC-word-failed-flag t))
509 (delete-backward-char 1)
510 (PC-do-completion 'word))
511 (beep)
512 (PC-temp-minibuffer-message (if ambig
513 " [Ambiguous dir name]"
514 (if (eq mode 'help)
515 " [No completions]"
516 " [No match]")))
517 nil))
519 ;; More than one valid completion found
520 ((or (cdr (setq helpposs poss))
521 (memq mode '(help word)))
523 ;; Handle completion-ignored-extensions
524 (and filename
525 (not (eq mode 'help))
526 (let ((p2 poss))
528 ;; Build a regular expression representing the extensions list
529 (or (equal completion-ignored-extensions PC-ignored-extensions)
530 (setq PC-ignored-regexp
531 (concat "\\("
532 (mapconcat
533 'regexp-quote
534 (setq PC-ignored-extensions
535 completion-ignored-extensions)
536 "\\|")
537 "\\)\\'")))
539 ;; Check if there are any without an ignored extension.
540 ;; Also ignore `.' and `..'.
541 (setq p nil)
542 (while p2
543 (or (string-match PC-ignored-regexp (car p2))
544 (string-match "\\(\\`\\|/\\)[.][.]?/?\\'" (car p2))
545 (setq p (cons (car p2) p)))
546 (setq p2 (cdr p2)))
548 ;; If there are "good" names, use them
549 (and p (setq poss p))))
551 ;; Is the actual string one of the possible completions?
552 (setq p (and (not (eq mode 'help)) poss))
553 (while (and p
554 (not (string-equal (car p) basestr)))
555 (setq p (cdr p)))
556 (and p (null mode)
557 (PC-temp-minibuffer-message " [Complete, but not unique]"))
558 (if (and p
559 (not (and (null mode)
560 (eq this-command last-command))))
563 ;; If ambiguous, try for a partial completion
564 (let ((improved nil)
565 prefix
566 (pt nil)
567 (skip "\\`"))
569 ;; Check if next few letters are the same in all cases
570 (if (and (not (eq mode 'help))
571 (setq prefix (try-completion "" (mapcar 'list poss))))
572 (let ((first t) i)
573 (if (eq mode 'word)
574 (setq prefix (PC-chop-word prefix basestr)))
575 (goto-char (+ beg (length dirname)))
576 (while (and (progn
577 (setq i 0)
578 (while (< i (length prefix))
579 (if (and (< (point) end)
580 (eq (aref prefix i)
581 (following-char)))
582 (forward-char 1)
583 (if (and (< (point) end)
584 (or (and (looking-at " ")
585 (memq (aref prefix i)
586 PC-delims-list))
587 (eq (downcase (aref prefix i))
588 (downcase
589 (following-char)))))
590 (progn
591 (delete-char 1)
592 (setq end (1- end)))
593 (and filename (looking-at "\\*")
594 (progn
595 (delete-char 1)
596 (setq end (1- end))))
597 (setq improved t))
598 (insert (substring prefix i (1+ i)))
599 (setq end (1+ end)))
600 (setq i (1+ i)))
601 (or pt (equal (point) beg)
602 (setq pt (point)))
603 (looking-at PC-delim-regex))
604 (setq skip (concat skip
605 (regexp-quote prefix)
606 PC-ndelims-regex)
607 prefix (try-completion
609 (mapcar
610 (function
611 (lambda (x)
612 (list
613 (and (string-match skip x)
614 (substring
616 (match-end 0))))))
617 poss)))
618 (or (> i 0) (> (length prefix) 0))
619 (or (not (eq mode 'word))
620 (and first (> (length prefix) 0)
621 (setq first nil
622 prefix (substring prefix 0 1))))))
623 (goto-char (if (eq mode 'word) end
624 (or pt beg)))))
626 (if (and (eq mode 'word)
627 (not PC-word-failed-flag))
629 (if improved
631 ;; We changed it... would it be complete without the space?
632 (if (PC-is-complete-p (buffer-substring 1 (1- end))
633 table pred)
634 (delete-region (1- end) end)))
636 (if improved
638 ;; We changed it... enough to be complete?
639 (and (eq mode 'exit)
640 (PC-is-complete-p (field-string) table pred))
642 ;; If totally ambiguous, display a list of completions
643 (if (or (eq completion-auto-help t)
644 (and completion-auto-help
645 (eq last-command this-command))
646 (eq mode 'help))
647 (with-output-to-temp-buffer "*Completions*"
648 (display-completion-list (sort helpposs 'string-lessp))
649 (save-excursion
650 (set-buffer standard-output)
651 ;; Record which part of the buffer we are completing
652 ;; so that choosing a completion from the list
653 ;; knows how much old text to replace.
654 (setq completion-base-size dirlength)))
655 (PC-temp-minibuffer-message " [Next char not unique]"))
656 nil)))))
658 ;; Only one possible completion
660 (if (and (equal basestr (car poss))
661 (not (and env-on filename)))
662 (if (null mode)
663 (PC-temp-minibuffer-message " [Sole completion]"))
664 (delete-region beg end)
665 (insert (format "%s"
666 (if filename
667 (substitute-in-file-name (concat dirname (car poss)))
668 (car poss)))))
669 t)))))
672 (defun PC-is-complete-p (str table pred)
673 (let ((res (if (listp table)
674 (assoc str table)
675 (if (vectorp table)
676 (or (equal str "nil") ; heh, heh, heh
677 (intern-soft str table))
678 (funcall table str pred 'lambda)))))
679 (and res
680 (or (not pred)
681 (and (not (listp table)) (not (vectorp table)))
682 (funcall pred res))
683 res)))
685 (defun PC-chop-word (new old)
686 (let ((i -1)
687 (j -1))
688 (while (and (setq i (string-match PC-delim-regex old (1+ i)))
689 (setq j (string-match PC-delim-regex new (1+ j)))))
690 (if (and j
691 (or (not PC-word-failed-flag)
692 (setq j (string-match PC-delim-regex new (1+ j)))))
693 (substring new 0 (1+ j))
694 new)))
696 (defvar PC-not-minibuffer nil)
698 (defun PC-temp-minibuffer-message (message)
699 "A Lisp version of `temp_minibuffer_message' from minibuf.c."
700 (cond (PC-not-minibuffer
701 (message message)
702 (sit-for 2)
703 (message ""))
704 ((fboundp 'temp-minibuffer-message)
705 (temp-minibuffer-message message))
707 (let ((point-max (point-max)))
708 (save-excursion
709 (goto-char point-max)
710 (insert message))
711 (let ((inhibit-quit t))
712 (sit-for 2)
713 (delete-region point-max (point-max))
714 (when quit-flag
715 (setq quit-flag nil
716 unread-command-events '(7))))))))
719 (defun PC-lisp-complete-symbol ()
720 "Perform completion on Lisp symbol preceding point.
721 That symbol is compared against the symbols that exist
722 and any additional characters determined by what is there
723 are inserted.
724 If the symbol starts just after an open-parenthesis,
725 only symbols with function definitions are considered.
726 Otherwise, all symbols with function definitions, values
727 or properties are considered."
728 (interactive)
729 (let* ((end (point))
730 (buffer-syntax (syntax-table))
731 (beg (unwind-protect
732 (save-excursion
733 (if lisp-mode-syntax-table
734 (set-syntax-table lisp-mode-syntax-table))
735 (backward-sexp 1)
736 (while (= (char-syntax (following-char)) ?\')
737 (forward-char 1))
738 (point))
739 (set-syntax-table buffer-syntax)))
740 (minibuffer-completion-table obarray)
741 (minibuffer-completion-predicate
742 (if (eq (char-after (1- beg)) ?\()
743 'fboundp
744 (function (lambda (sym)
745 (or (boundp sym) (fboundp sym)
746 (symbol-plist sym))))))
747 (PC-not-minibuffer t))
748 (PC-do-completion nil beg end)))
750 (defun PC-complete-as-file-name ()
751 "Perform completion on file names preceding point.
752 Environment vars are converted to their values."
753 (interactive)
754 (let* ((end (point))
755 (beg (if (re-search-backward "[^\\][ \t\n\"\`\'][^ \t\n\"\`\']"
756 (point-min) t)
757 (+ (point) 2)
758 (point-min)))
759 (minibuffer-completion-table 'read-file-name-internal)
760 (minibuffer-completion-predicate "")
761 (PC-not-minibuffer t))
762 (goto-char end)
763 (PC-do-completion nil beg end)))
765 ;;; Use the shell to do globbing.
766 ;;; This could now use file-expand-wildcards instead.
768 (defun PC-expand-many-files (name)
769 (save-excursion
770 (set-buffer (generate-new-buffer " *Glob Output*"))
771 (erase-buffer)
772 (shell-command (concat "echo " name) t)
773 (goto-char (point-min))
774 (if (looking-at ".*No match")
776 (insert "(\"")
777 (while (search-forward " " nil t)
778 (delete-backward-char 1)
779 (insert "\" \""))
780 (goto-char (point-max))
781 (delete-backward-char 1)
782 (insert "\")")
783 (goto-char (point-min))
784 (let ((files (read (current-buffer))) (p nil))
785 (kill-buffer (current-buffer))
786 (or (equal completion-ignored-extensions PC-ignored-extensions)
787 (setq PC-ignored-regexp
788 (concat "\\("
789 (mapconcat
790 'regexp-quote
791 (setq PC-ignored-extensions
792 completion-ignored-extensions)
793 "\\|")
794 "\\)\\'")))
795 (setq p nil)
796 (while files
797 (or (string-match PC-ignored-regexp (car files))
798 (setq p (cons (car files) p)))
799 (setq files (cdr files)))
800 p))))
802 ;;; Facilities for loading C header files. This is independent from the
803 ;;; main completion code. See also the variable `PC-include-file-path'
804 ;;; at top of this file.
806 (defun PC-look-for-include-file ()
807 (if (string-match "[\"<]\\([^\"<>]*\\)[\">]?$" (buffer-file-name))
808 (let ((name (substring (buffer-file-name)
809 (match-beginning 1) (match-end 1)))
810 (punc (aref (buffer-file-name) (match-beginning 0)))
811 (path nil)
812 new-buf)
813 (kill-buffer (current-buffer))
814 (if (equal name "")
815 (save-excursion
816 (set-buffer (car (buffer-list)))
817 (save-excursion
818 (beginning-of-line)
819 (if (looking-at
820 "[ \t]*#[ \t]*include[ \t]+[<\"]\\(.+\\)[>\"][ \t]*[\n/]")
821 (setq name (buffer-substring (match-beginning 1)
822 (match-end 1))
823 punc (char-after (1- (match-beginning 1))))
824 ;; Suggested by Frank Siebenlist:
825 (if (or (looking-at
826 "[ \t]*([ \t]*load[ \t]+\"\\([^\"]+\\)\"")
827 (looking-at
828 "[ \t]*([ \t]*load-library[ \t]+\"\\([^\"]+\\)\"")
829 (looking-at
830 "[ \t]*([ \t]*require[ \t]+'\\([^\t )]+\\)[\t )]"))
831 (progn
832 (setq name (buffer-substring (match-beginning 1)
833 (match-end 1))
834 punc ?\<
835 path load-path)
836 (if (string-match "\\.elc$" name)
837 (setq name (substring name 0 -1))
838 (or (string-match "\\.el$" name)
839 (setq name (concat name ".el")))))
840 (error "Not on an #include line"))))))
841 (or (string-match "\\.[[:alnum:]]+$" name)
842 (setq name (concat name ".h")))
843 (if (eq punc ?\<)
844 (let ((path (or path (PC-include-file-path))))
845 (while (and path
846 (not (file-exists-p
847 (concat (file-name-as-directory (car path))
848 name))))
849 (setq path (cdr path)))
850 (if path
851 (setq name (concat (file-name-as-directory (car path)) name))
852 (error "No such include file: <%s>" name)))
853 (let ((dir (save-excursion
854 (set-buffer (car (buffer-list)))
855 default-directory)))
856 (if (file-exists-p (concat dir name))
857 (setq name (concat dir name))
858 (error "No such include file: `%s'" name))))
859 (setq new-buf (get-file-buffer name))
860 (if new-buf
861 ;; no need to verify last-modified time for this!
862 (set-buffer new-buf)
863 (setq new-buf (create-file-buffer name))
864 (set-buffer new-buf)
865 (erase-buffer)
866 (insert-file-contents name t))
867 ;; Returning non-nil with the new buffer current
868 ;; is sufficient to tell find-file to use it.
870 nil))
872 (defun PC-include-file-path ()
873 (or PC-include-file-path
874 (let ((env (getenv "INCPATH"))
875 (path nil)
876 pos)
877 (or env (error "No include file path specified"))
878 (while (setq pos (string-match ":[^:]+$" env))
879 (setq path (cons (substring env (1+ pos)) path)
880 env (substring env 0 pos)))
881 path)))
883 ;;; This is adapted from lib-complete.el, by Mike Williams.
884 (defun PC-include-file-all-completions (file search-path &optional full)
885 "Return all completions for FILE in any directory on SEARCH-PATH.
886 If optional third argument FULL is non-nil, returned pathnames should be
887 absolute rather than relative to some directory on the SEARCH-PATH."
888 (setq search-path
889 (mapcar (lambda (dir)
890 (if dir (file-name-as-directory dir) default-directory))
891 search-path))
892 (if (file-name-absolute-p file)
893 ;; It's an absolute file name, so don't need search-path
894 (progn
895 (setq file (expand-file-name file))
896 (file-name-all-completions
897 (file-name-nondirectory file) (file-name-directory file)))
898 (let ((subdir (file-name-directory file))
899 (ndfile (file-name-nondirectory file))
900 file-lists)
901 ;; Append subdirectory part to each element of search-path
902 (if subdir
903 (setq search-path
904 (mapcar (lambda (dir) (concat dir subdir))
905 search-path)
906 file ))
907 ;; Make list of completions in each directory on search-path
908 (while search-path
909 (let* ((dir (car search-path))
910 (subdir (if full dir subdir)))
911 (if (file-directory-p dir)
912 (progn
913 (setq file-lists
914 (cons
915 (mapcar (lambda (file) (concat subdir file))
916 (file-name-all-completions ndfile
917 (car search-path)))
918 file-lists))))
919 (setq search-path (cdr search-path))))
920 ;; Compress out duplicates while building complete list (slloooow!)
921 (let ((sorted (sort (apply 'nconc file-lists)
922 (lambda (x y) (not (string-lessp x y)))))
923 compressed)
924 (while sorted
925 (if (equal (car sorted) (car compressed)) nil
926 (setq compressed (cons (car sorted) compressed)))
927 (setq sorted (cdr sorted)))
928 compressed))))
930 (defun PC-read-include-file-name-internal (string dir action)
931 (if (string-match "<\\([^\"<>]*\\)>?$" string)
932 (let* ((name (substring string (match-beginning 1) (match-end 1)))
933 (str2 (substring string (match-beginning 0)))
934 (completion-table
935 (mapcar (function (lambda (x) (list (format "<%s>" x))))
936 (PC-include-file-all-completions
937 name (PC-include-file-path)))))
938 (cond
939 ((not completion-table) nil)
940 ((eq action nil) (try-completion str2 completion-table nil))
941 ((eq action t) (all-completions str2 completion-table nil))
942 ((eq action 'lambda)
943 (eq (try-completion str2 completion-table nil) t))))
944 (funcall PC-old-read-file-name-internal string dir action)))
947 (provide 'complete)
949 ;;; complete.el ends here