Terminology cleanup.
[emacs.git] / lisp / complete.el
blobbc581052508e196c0b9c1699f5412e5e5f2f7398
1 ;;; complete.el --- partial completion mechanism plus other goodies
3 ;; Copyright (C) 1990, 1991, 1992, 1993, 1999, 2000, 2001, 2002, 2003,
4 ;; 2004, 2005, 2006, 2007 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 3, 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., 51 Franklin Street, Fifth Floor,
25 ;; Boston, MA 02110-1301, 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 ;; In addition, this package includes a feature for accessing include
82 ;; files. For example, `C-x C-f <sys/time.h> RET' reads the file
83 ;; /usr/include/sys/time.h. The variable PC-include-file-path is a
84 ;; list of directories in which to search for include files. Completion
85 ;; is supported in include file names.
88 ;;; Code:
90 (defgroup partial-completion nil
91 "Partial Completion of items."
92 :prefix "pc-"
93 :group 'minibuffer
94 :group 'convenience)
96 (defcustom PC-first-char 'find-file
97 "Control how the first character of a string is to be interpreted.
98 If nil, the first character of a string is not taken literally if it is a word
99 delimiter, so that \".e\" matches \"*.e*\".
100 If t, the first character of a string is always taken literally even if it is a
101 word delimiter, so that \".e\" matches \".e*\".
102 If non-nil and non-t, the first character is taken literally only for file name
103 completion."
104 :type '(choice (const :tag "delimiter" nil)
105 (const :tag "literal" t)
106 (other :tag "find-file" find-file))
107 :group 'partial-completion)
109 (defcustom PC-meta-flag t
110 "If non-nil, TAB means PC completion and M-TAB means normal completion.
111 Otherwise, TAB means normal completion and M-TAB means Partial Completion."
112 :type 'boolean
113 :group 'partial-completion)
115 (defcustom PC-word-delimiters "-_. "
116 "A string of characters treated as word delimiters for completion.
117 Some arcane rules:
118 If `]' is in this string, it must come first.
119 If `^' is in this string, it must not come first.
120 If `-' is in this string, it must come first or right after `]'.
121 In other words, if S is this string, then `[S]' must be a valid Emacs regular
122 expression (not containing character ranges like `a-z')."
123 :type 'string
124 :group 'partial-completion)
126 (defcustom PC-include-file-path '("/usr/include" "/usr/local/include")
127 "A list of directories in which to look for include files.
128 If nil, means use the colon-separated path in the variable $INCPATH instead."
129 :type '(repeat directory)
130 :group 'partial-completion)
132 (defcustom PC-disable-includes nil
133 "If non-nil, include-file support in \\[find-file] is disabled."
134 :type 'boolean
135 :group 'partial-completion)
137 (defvar PC-default-bindings t
138 "If non-nil, default partial completion key bindings are suppressed.")
140 (defvar PC-env-vars-alist nil
141 "A list of the environment variable names and values.")
144 (defun PC-bindings (bind)
145 (let ((completion-map minibuffer-local-completion-map)
146 (must-match-map minibuffer-local-must-match-map))
147 (cond ((not bind)
148 ;; These bindings are the default bindings. It would be better to
149 ;; restore the previous bindings.
150 (define-key read-expression-map "\e\t" 'lisp-complete-symbol)
152 (define-key completion-map "\t" 'minibuffer-complete)
153 (define-key completion-map " " 'minibuffer-complete-word)
154 (define-key completion-map "?" 'minibuffer-completion-help)
156 (define-key must-match-map "\r" 'minibuffer-complete-and-exit)
157 (define-key must-match-map "\n" 'minibuffer-complete-and-exit)
159 (define-key global-map [remap lisp-complete-symbol] nil))
160 (PC-default-bindings
161 (define-key read-expression-map "\e\t" 'PC-lisp-complete-symbol)
163 (define-key completion-map "\t" 'PC-complete)
164 (define-key completion-map " " 'PC-complete-word)
165 (define-key completion-map "?" 'PC-completion-help)
167 (define-key completion-map "\e\t" 'PC-complete)
168 (define-key completion-map "\e " 'PC-complete-word)
169 (define-key completion-map "\e\r" 'PC-force-complete-and-exit)
170 (define-key completion-map "\e\n" 'PC-force-complete-and-exit)
171 (define-key completion-map "\e?" 'PC-completion-help)
173 (define-key must-match-map "\r" 'PC-complete-and-exit)
174 (define-key must-match-map "\n" 'PC-complete-and-exit)
176 (define-key must-match-map "\e\r" 'PC-complete-and-exit)
177 (define-key must-match-map "\e\n" 'PC-complete-and-exit)
179 (define-key global-map [remap lisp-complete-symbol] 'PC-lisp-complete-symbol)))))
181 (defvar PC-do-completion-end nil
182 "Internal variable used by `PC-do-completion'.")
184 (make-variable-buffer-local 'PC-do-completion-end)
186 (defvar PC-goto-end nil
187 "Internal variable set in `PC-do-completion', used in
188 `choose-completion-string-functions'.")
190 (make-variable-buffer-local 'PC-goto-end)
192 ;;;###autoload
193 (define-minor-mode partial-completion-mode
194 "Toggle Partial Completion mode.
195 With prefix ARG, turn Partial Completion mode on if ARG is positive.
197 When Partial Completion mode is enabled, TAB (or M-TAB if `PC-meta-flag' is
198 nil) is enhanced so that if some string is divided into words and each word is
199 delimited by a character in `PC-word-delimiters', partial words are completed
200 as much as possible and `*' characters are treated likewise in file names.
202 For example, M-x p-c-m expands to M-x partial-completion-mode since no other
203 command begins with that sequence of characters, and
204 \\[find-file] f_b.c TAB might complete to foo_bar.c if that file existed and no
205 other file in that directory begins with that sequence of characters.
207 Unless `PC-disable-includes' is non-nil, the `<...>' sequence is interpreted
208 specially in \\[find-file]. For example,
209 \\[find-file] <sys/time.h> RET finds the file `/usr/include/sys/time.h'.
210 See also the variable `PC-include-file-path'.
212 Partial Completion mode extends the meaning of `completion-auto-help' (which
213 see), so that if it is neither nil nor t, Emacs shows the `*Completions*'
214 buffer only on the second attempt to complete. That is, if TAB finds nothing
215 to complete, the first TAB just says \"Next char not unique\" and the
216 second TAB brings up the `*Completions*' buffer."
217 :global t :group 'partial-completion
218 ;; Deal with key bindings...
219 (PC-bindings partial-completion-mode)
220 ;; Deal with include file feature...
221 (cond ((not partial-completion-mode)
222 (remove-hook 'find-file-not-found-functions 'PC-look-for-include-file))
223 ((not PC-disable-includes)
224 (add-hook 'find-file-not-found-functions 'PC-look-for-include-file)))
225 ;; Adjust the completion selection in *Completion* buffers to the way
226 ;; we work. The default minibuffer completion code only completes the
227 ;; text before point and leaves the text after point alone (new in
228 ;; Emacs-22). In contrast we use the whole text and we even sometimes
229 ;; move point to a place before EOB, to indicate the first position where
230 ;; there's a difference, so when the user uses choose-completion, we have
231 ;; to trick choose-completion into replacing the whole minibuffer text
232 ;; rather than only the text before point. --Stef
233 (funcall
234 (if partial-completion-mode 'add-hook 'remove-hook)
235 'choose-completion-string-functions
236 (lambda (choice buffer mini-p base-size)
237 ;; When completing M-: (lisp- ) with point before the ), it is
238 ;; not appropriate to go to point-max (unlike the filename case).
239 (if (and (not PC-goto-end)
240 mini-p)
241 (goto-char (point-max))
242 ;; Need a similar hack for the non-minibuffer-case -- gm.
243 (when PC-do-completion-end
244 (goto-char PC-do-completion-end)
245 (setq PC-do-completion-end nil)))
246 (setq PC-goto-end nil)
247 nil))
248 ;; Build the env-completion and mapping table.
249 (when (and partial-completion-mode (null PC-env-vars-alist))
250 (setq PC-env-vars-alist
251 (mapcar (lambda (string)
252 (let ((d (string-match "=" string)))
253 (cons (concat "$" (substring string 0 d))
254 (and d (substring string (1+ d))))))
255 process-environment))))
258 (defun PC-complete ()
259 "Like minibuffer-complete, but allows \"b--di\"-style abbreviations.
260 For example, \"M-x b--di\" would match `byte-recompile-directory', or any
261 name which consists of three or more words, the first beginning with \"b\"
262 and the third beginning with \"di\".
264 The pattern \"b--d\" is ambiguous for `byte-recompile-directory' and
265 `beginning-of-defun', so this would produce a list of completions
266 just like when normal Emacs completions are ambiguous.
268 Word-delimiters for the purposes of Partial Completion are \"-\", \"_\",
269 \".\", and SPC."
270 (interactive)
271 (if (PC-was-meta-key)
272 (minibuffer-complete)
273 ;; If the previous command was not this one,
274 ;; never scroll, always retry completion.
275 (or (eq last-command this-command)
276 (setq minibuffer-scroll-window nil))
277 (let ((window minibuffer-scroll-window))
278 ;; If there's a fresh completion window with a live buffer,
279 ;; and this command is repeated, scroll that window.
280 (if (and window (window-buffer window)
281 (buffer-name (window-buffer window)))
282 (with-current-buffer (window-buffer window)
283 (if (pos-visible-in-window-p (point-max) window)
284 (set-window-start window (point-min) nil)
285 (scroll-other-window)))
286 (PC-do-completion nil)))))
289 (defun PC-complete-word ()
290 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
291 See `PC-complete' for details.
292 This can be bound to other keys, like `-' and `.', if you wish."
293 (interactive)
294 (if (eq (PC-was-meta-key) PC-meta-flag)
295 (if (eq last-command-char ? )
296 (minibuffer-complete-word)
297 (self-insert-command 1))
298 (self-insert-command 1)
299 (if (eobp)
300 (PC-do-completion 'word))))
303 (defun PC-complete-space ()
304 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
305 See `PC-complete' for details.
306 This is suitable for binding to other keys which should act just like SPC."
307 (interactive)
308 (if (eq (PC-was-meta-key) PC-meta-flag)
309 (minibuffer-complete-word)
310 (insert " ")
311 (if (eobp)
312 (PC-do-completion 'word))))
315 (defun PC-complete-and-exit ()
316 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
317 See `PC-complete' for details."
318 (interactive)
319 (if (eq (PC-was-meta-key) PC-meta-flag)
320 (minibuffer-complete-and-exit)
321 (PC-do-complete-and-exit)))
323 (defun PC-force-complete-and-exit ()
324 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
325 See `PC-complete' for details."
326 (interactive)
327 (let ((minibuffer-completion-confirm nil))
328 (PC-do-complete-and-exit)))
330 (defun PC-do-complete-and-exit ()
331 (cond
332 ((= (point-max) (minibuffer-prompt-end))
333 ;; Duplicate the "bug" that Info-menu relies on...
334 (exit-minibuffer))
335 ((eq minibuffer-completion-confirm 'confirm-only)
336 (if (or (eq last-command this-command)
337 (test-completion (field-string)
338 minibuffer-completion-table
339 minibuffer-completion-predicate))
340 (exit-minibuffer)
341 (PC-temp-minibuffer-message " [Confirm]")))
343 (let ((flag (PC-do-completion 'exit)))
344 (and flag
345 (if (or (eq flag 'complete)
346 (not minibuffer-completion-confirm))
347 (exit-minibuffer)
348 (PC-temp-minibuffer-message " [Confirm]")))))))
351 (defun PC-completion-help ()
352 "Like `minibuffer-completion-help', but allows \"b--di\"-style abbreviations.
353 See `PC-complete' for details."
354 (interactive)
355 (if (eq (PC-was-meta-key) PC-meta-flag)
356 (minibuffer-completion-help)
357 (PC-do-completion 'help)))
359 (defun PC-was-meta-key ()
360 (or (/= (length (this-command-keys)) 1)
361 (let ((key (aref (this-command-keys) 0)))
362 (if (integerp key)
363 (>= key 128)
364 (not (null (memq 'meta (event-modifiers key))))))))
367 (defvar PC-ignored-extensions 'empty-cache)
368 (defvar PC-delims 'empty-cache)
369 (defvar PC-ignored-regexp nil)
370 (defvar PC-word-failed-flag nil)
371 (defvar PC-delim-regex nil)
372 (defvar PC-ndelims-regex nil)
373 (defvar PC-delims-list nil)
375 (defvar PC-completion-as-file-name-predicate
376 (lambda () minibuffer-completing-file-name)
377 "A function testing whether a minibuffer completion now will work filename-style.
378 The function takes no arguments, and typically looks at the value
379 of `minibuffer-completion-table' and the minibuffer contents.")
381 ;; Returns the sequence of non-delimiter characters that follow regexp in string.
382 (defun PC-chunk-after (string regexp)
383 (if (not (string-match regexp string))
384 (let ((message (format "String %s didn't match regexp %s" string regexp)))
385 (message message)
386 (error message)))
387 (let ((result (substring string (match-end 0))))
388 ;; result may contain multiple chunks
389 (if (string-match PC-delim-regex result)
390 (setq result (substring result 0 (match-beginning 0))))
391 result))
393 (defun test-completion-ignore-case (str table pred)
394 "Like `test-completion', but ignores case when possible."
395 ;; Binding completion-ignore-case to nil ensures, for compatibility with
396 ;; standard completion, that the return value is exactly one of the
397 ;; possibilities. Do this binding only if pred is nil, out of paranoia;
398 ;; perhaps it is safe even if pred is non-nil.
399 (if pred
400 (test-completion str table pred)
401 (let ((completion-ignore-case nil))
402 (test-completion str table pred))))
404 ;; The following function is an attempt to work around two problems:
406 ;; (1) When complete.el was written, (try-completion "" '(("") (""))) used to
407 ;; return the value "". With a change from 2002-07-07 it returns t which caused
408 ;; `PC-lisp-complete-symbol' to fail with a "Wrong type argument: sequencep, t"
409 ;; error. `PC-try-completion' returns STRING in this case.
411 ;; (2) (try-completion "" '((""))) returned t before the above-mentioned change.
412 ;; Since `PC-chop-word' operates on the return value of `try-completion' this
413 ;; case might have provoked a similar error as in (1). `PC-try-completion'
414 ;; returns "" instead. I don't know whether this is a real problem though.
416 ;; Since `PC-try-completion' is not a guaranteed to fix these bugs reliably, you
417 ;; should try to look at the following discussions when you encounter problems:
418 ;; - emacs-pretest-bug ("Partial Completion" starting 2007-02-23),
419 ;; - emacs-devel ("[address-of-OP: Partial completion]" starting 2007-02-24),
420 ;; - emacs-devel ("[address-of-OP: EVAL and mouse selection in *Completions*]"
421 ;; starting 2007-03-05).
422 (defun PC-try-completion (string alist &optional predicate)
423 "Like `try-completion' but return STRING instead of t."
424 (let ((result (try-completion string alist predicate)))
425 (if (eq result t) string result)))
427 ;; TODO document MODE magic...
428 (defun PC-do-completion (&optional mode beg end goto-end)
429 "Internal function to do the work of partial completion.
430 Text to be completed lies between BEG and END. Normally when
431 replacing text in the minibuffer, this function replaces up to
432 point-max (as is appropriate for completing a file name). If
433 GOTO-END is non-nil, however, it instead replaces up to END."
434 (or beg (setq beg (minibuffer-prompt-end)))
435 (or end (setq end (point-max)))
436 (let* ((table (if (eq minibuffer-completion-table 'read-file-name-internal)
437 'PC-read-file-name-internal
438 minibuffer-completion-table))
439 (pred minibuffer-completion-predicate)
440 (filename (funcall PC-completion-as-file-name-predicate))
441 (dirname nil) ; non-nil only if a filename is being completed
442 ;; The following used to be "(dirlength 0)" which caused the erasure of
443 ;; the entire buffer text before `point' when inserting a completion
444 ;; into a buffer.
445 dirlength
446 (str (buffer-substring beg end))
447 (incname (and filename (string-match "<\\([^\"<>]*\\)>?$" str)))
448 (ambig nil)
449 basestr origstr
450 env-on
451 regex
452 p offset
453 abbreviated
454 (poss nil)
455 helpposs
456 (case-fold-search completion-ignore-case))
458 ;; Check if buffer contents can already be considered complete
459 (if (and (eq mode 'exit)
460 (test-completion str table pred))
461 (progn
462 ;; If completion-ignore-case is non-nil, insert the
463 ;; completion string since that may have a different case.
464 (when completion-ignore-case
465 (setq str (PC-try-completion str table pred))
466 (delete-region beg end)
467 (insert str))
468 'complete)
470 ;; Do substitutions in directory names
471 (and filename
472 (setq basestr (or (file-name-directory str) ""))
473 (setq dirlength (length basestr))
474 ;; Do substitutions in directory names
475 (setq p (substitute-in-file-name basestr))
476 (not (string-equal basestr p))
477 (setq str (concat p (file-name-nondirectory str)))
478 (progn
479 (delete-region beg end)
480 (insert str)
481 (setq end (+ beg (length str)))))
483 ;; Prepare various delimiter strings
484 (or (equal PC-word-delimiters PC-delims)
485 (setq PC-delims PC-word-delimiters
486 PC-delim-regex (concat "[" PC-delims "]")
487 PC-ndelims-regex (concat "[^" PC-delims "]*")
488 PC-delims-list (append PC-delims nil)))
490 ;; Add wildcards if necessary
491 (and filename
492 (let ((dir (file-name-directory str))
493 (file (file-name-nondirectory str))
494 ;; The base dir for file-completion is passed in `predicate'.
495 (default-directory (expand-file-name pred)))
496 (while (and (stringp dir) (not (file-directory-p dir)))
497 (setq dir (directory-file-name dir))
498 (setq file (concat (replace-regexp-in-string
499 PC-delim-regex "*\\&"
500 (file-name-nondirectory dir))
501 "*/" file))
502 (setq dir (file-name-directory dir)))
503 (setq origstr str str (concat dir file))))
505 ;; Look for wildcard expansions in directory name
506 (and filename
507 (string-match "\\*.*/" str)
508 (let ((pat str)
509 ;; The base dir for file-completion is passed in `predicate'.
510 (default-directory (expand-file-name pred))
511 files)
512 (setq p (1+ (string-match "/[^/]*\\'" pat)))
513 (while (setq p (string-match PC-delim-regex pat p))
514 (setq pat (concat (substring pat 0 p)
516 (substring pat p))
517 p (+ p 2)))
518 (setq files (PC-expand-many-files (concat pat "*")))
519 (if files
520 (let ((dir (file-name-directory (car files)))
521 (p files))
522 (while (and (setq p (cdr p))
523 (equal dir (file-name-directory (car p)))))
524 (if p
525 (setq filename nil table nil pred nil
526 ambig t)
527 (delete-region beg end)
528 (setq str (concat dir (file-name-nondirectory str)))
529 (insert str)
530 (setq end (+ beg (length str)))))
531 (if origstr
532 ;; If the wildcards were introduced by us, it's
533 ;; possible that PC-read-file-name-internal can
534 ;; still find matches for the original string
535 ;; even if we couldn't, so remove the added
536 ;; wildcards.
537 (setq str origstr)
538 (setq filename nil table nil pred nil)))))
540 ;; Strip directory name if appropriate
541 (if filename
542 (if incname
543 (setq basestr (substring str incname)
544 dirname (substring str 0 incname))
545 (setq basestr (file-name-nondirectory str)
546 dirname (file-name-directory str))
547 ;; Make sure str is consistent with its directory and basename
548 ;; parts. This is important on DOZe'NT systems when str only
549 ;; includes a drive letter, like in "d:".
550 (setq str (concat dirname basestr)))
551 (setq basestr str))
553 ;; Convert search pattern to a standard regular expression
554 (setq regex (regexp-quote basestr)
555 offset (if (and (> (length regex) 0)
556 (not (eq (aref basestr 0) ?\*))
557 (or (eq PC-first-char t)
558 (and PC-first-char filename))) 1 0)
559 p offset)
560 (while (setq p (string-match PC-delim-regex regex p))
561 (if (eq (aref regex p) ? )
562 (setq regex (concat (substring regex 0 p)
563 PC-ndelims-regex
564 PC-delim-regex
565 (substring regex (1+ p)))
566 p (+ p (length PC-ndelims-regex) (length PC-delim-regex)))
567 (let ((bump (if (memq (aref regex p)
568 '(?$ ?^ ?\. ?* ?+ ?? ?[ ?] ?\\))
569 -1 0)))
570 (setq regex (concat (substring regex 0 (+ p bump))
571 PC-ndelims-regex
572 (substring regex (+ p bump)))
573 p (+ p (length PC-ndelims-regex) 1)))))
574 (setq p 0)
575 (if filename
576 (while (setq p (string-match "\\\\\\*" regex p))
577 (setq regex (concat (substring regex 0 p)
578 "[^/]*"
579 (substring regex (+ p 2))))))
580 ;;(setq the-regex regex)
581 (setq regex (concat "\\`" regex))
583 (and (> (length basestr) 0)
584 (= (aref basestr 0) ?$)
585 (setq env-on t
586 table PC-env-vars-alist
587 pred nil))
589 ;; Find an initial list of possible completions
590 (unless (setq p (string-match (concat PC-delim-regex
591 (if filename "\\|\\*" ""))
593 (+ (length dirname) offset)))
595 ;; Minibuffer contains no hyphens -- simple case!
596 (setq poss (all-completions (if env-on basestr str)
597 table
598 pred))
599 (unless (or poss (string-equal str ""))
600 ;; Try completion as an abbreviation, e.g. "mvb" ->
601 ;; "m-v-b" -> "multiple-value-bind", but only for
602 ;; non-empty strings.
603 (setq origstr str
604 abbreviated t)
605 (if filename
606 (cond
607 ;; "alpha" or "/alpha" -> expand whole path.
608 ((string-match "^/?\\([A-Za-z0-9]+\\)$" str)
609 (setq
610 basestr ""
611 p nil
612 poss (PC-expand-many-files
613 (concat "/"
614 (mapconcat #'list (match-string 1 str) "*/")
615 "*"))
616 beg (1- beg)))
617 ;; Alphanumeric trailer -> expand trailing file
618 ((string-match "^\\(.+/\\)\\([A-Za-z0-9]+\\)$" str)
619 (setq regex (concat "\\`"
620 (mapconcat #'list
621 (match-string 2 str)
622 "[A-Za-z0-9]*[^A-Za-z0-9]"))
623 p (1+ (length (match-string 1 str))))))
624 (setq regex (concat "\\`" (mapconcat #'list str "[^-]*-"))
625 p 1))))
626 (when p
627 ;; Use all-completions to do an initial cull. This is a big win,
628 ;; since all-completions is written in C!
629 (let ((compl (all-completions (if env-on
630 (file-name-nondirectory (substring str 0 p))
631 (substring str 0 p))
632 table
633 pred)))
634 (setq p compl)
635 (when (and compl abbreviated)
636 (if filename
637 (progn
638 (setq p nil)
639 (dolist (x compl)
640 (when (string-match regex x)
641 (push x p)))
642 (setq basestr (try-completion "" p)))
643 (setq basestr (mapconcat 'list str "-"))
644 (delete-region beg end)
645 (setq end (+ beg (length basestr)))
646 (insert basestr))))
647 (while p
648 (and (string-match regex (car p))
649 (progn
650 (set-text-properties 0 (length (car p)) '() (car p))
651 (setq poss (cons (car p) poss))))
652 (setq p (cdr p))))
654 ;; If table had duplicates, they can be here.
655 (delete-dups poss)
657 ;; Handle completion-ignored-extensions
658 (and filename
659 (not (eq mode 'help))
660 (let ((p2 poss))
662 ;; Build a regular expression representing the extensions list
663 (or (equal completion-ignored-extensions PC-ignored-extensions)
664 (setq PC-ignored-regexp
665 (concat "\\("
666 (mapconcat
667 'regexp-quote
668 (setq PC-ignored-extensions
669 completion-ignored-extensions)
670 "\\|")
671 "\\)\\'")))
673 ;; Check if there are any without an ignored extension.
674 ;; Also ignore `.' and `..'.
675 (setq p nil)
676 (while p2
677 (or (string-match PC-ignored-regexp (car p2))
678 (string-match "\\(\\`\\|/\\)[.][.]?/?\\'" (car p2))
679 (setq p (cons (car p2) p)))
680 (setq p2 (cdr p2)))
682 ;; If there are "good" names, use them
683 (and p (setq poss p))))
685 ;; Now we have a list of possible completions
687 (cond
689 ;; No valid completions found
690 ((null poss)
691 (if (and (eq mode 'word)
692 (not PC-word-failed-flag))
693 (let ((PC-word-failed-flag t))
694 (delete-backward-char 1)
695 (PC-do-completion 'word))
696 (when abbreviated
697 (delete-region beg end)
698 (insert origstr))
699 (beep)
700 (PC-temp-minibuffer-message (if ambig
701 " [Ambiguous dir name]"
702 (if (eq mode 'help)
703 " [No completions]"
704 " [No match]")))
705 nil))
707 ;; More than one valid completion found
708 ((or (cdr (setq helpposs poss))
709 (memq mode '(help word)))
711 ;; Is the actual string one of the possible completions?
712 (setq p (and (not (eq mode 'help)) poss))
713 (while (and p
714 (not (string-equal (car p) basestr)))
715 (setq p (cdr p)))
716 (and p (null mode)
717 (PC-temp-minibuffer-message " [Complete, but not unique]"))
718 (if (and p
719 (not (and (null mode)
720 (eq this-command last-command))))
723 ;; If ambiguous, try for a partial completion
724 (let ((improved nil)
725 prefix
726 (pt nil)
727 (skip "\\`"))
729 ;; Check if next few letters are the same in all cases
730 (if (and (not (eq mode 'help))
731 (setq prefix (PC-try-completion
732 (PC-chunk-after basestr skip) poss)))
733 (let ((first t) i)
734 ;; Retain capitalization of user input even if
735 ;; completion-ignore-case is set.
736 (if (eq mode 'word)
737 (setq prefix (PC-chop-word prefix basestr)))
738 (goto-char (+ beg (length dirname)))
739 (while (and (progn
740 (setq i 0) ; index into prefix string
741 (while (< i (length prefix))
742 (if (and (< (point) end)
743 (eq (downcase (aref prefix i))
744 (downcase (following-char))))
745 ;; same char (modulo case); no action
746 (forward-char 1)
747 (if (and (< (point) end)
748 (and (looking-at " ")
749 (memq (aref prefix i)
750 PC-delims-list)))
751 ;; replace " " by the actual delimiter
752 (progn
753 (delete-char 1)
754 (insert (substring prefix i (1+ i))))
755 ;; insert a new character
756 (progn
757 (and filename (looking-at "\\*")
758 (progn
759 (delete-char 1)
760 (setq end (1- end))))
761 (setq improved t)
762 (insert (substring prefix i (1+ i)))
763 (setq end (1+ end)))))
764 (setq i (1+ i)))
765 (or pt (setq pt (point)))
766 (looking-at PC-delim-regex))
767 (setq skip (concat skip
768 (regexp-quote prefix)
769 PC-ndelims-regex)
770 prefix (PC-try-completion
771 (PC-chunk-after
772 ;; not basestr, because that does
773 ;; not reflect insertions
774 (buffer-substring
775 (+ beg (length dirname)) end)
776 skip)
777 (mapcar
778 (lambda (x)
779 (when (string-match skip x)
780 (substring x (match-end 0))))
781 poss)))
782 (or (> i 0) (> (length prefix) 0))
783 (or (not (eq mode 'word))
784 (and first (> (length prefix) 0)
785 (setq first nil
786 prefix (substring prefix 0 1))))))
787 (goto-char (if (eq mode 'word) end
788 (or pt beg)))))
790 (if (and (eq mode 'word)
791 (not PC-word-failed-flag))
793 (if improved
795 ;; We changed it... would it be complete without the space?
796 (if (test-completion (buffer-substring 1 (1- end))
797 table pred)
798 (delete-region (1- end) end)))
800 (if improved
802 ;; We changed it... enough to be complete?
803 (and (eq mode 'exit)
804 (test-completion-ignore-case (field-string) table pred))
806 ;; If totally ambiguous, display a list of completions
807 (if (or (eq completion-auto-help t)
808 (and completion-auto-help
809 (eq last-command this-command))
810 (eq mode 'help))
811 (let ((prompt-end (minibuffer-prompt-end)))
812 (with-output-to-temp-buffer "*Completions*"
813 (display-completion-list (sort helpposs 'string-lessp))
814 (setq PC-do-completion-end end
815 PC-goto-end goto-end)
816 (with-current-buffer standard-output
817 ;; Record which part of the buffer we are completing
818 ;; so that choosing a completion from the list
819 ;; knows how much old text to replace.
820 ;; This was briefly nil in the non-dirname case.
821 ;; However, if one calls PC-lisp-complete-symbol
822 ;; on "(ne-f" with point on the hyphen, PC offers
823 ;; all completions starting with "(ne", some of
824 ;; which do not match the "-f" part (maybe it
825 ;; should not, but it does). In such cases,
826 ;; completion gets confused trying to figure out
827 ;; how much to replace, so we tell it explicitly
828 ;; (ie, the number of chars in the buffer before beg).
830 ;; Note that choose-completion-string-functions
831 ;; plays around with point.
832 (setq completion-base-size (if dirname
833 dirlength
834 (- beg prompt-end))))))
835 (PC-temp-minibuffer-message " [Next char not unique]"))
836 ;; Expansion of filenames is not reversible,
837 ;; so just keep the prefix.
838 (when (and abbreviated filename)
839 (delete-region (point) end))
840 nil)))))
842 ;; Only one possible completion
844 (if (and (equal basestr (car poss))
845 (not (and env-on filename))
846 (not abbreviated))
847 (if (null mode)
848 (PC-temp-minibuffer-message " [Sole completion]"))
849 (delete-region beg end)
850 (insert (format "%s"
851 (if filename
852 (substitute-in-file-name (concat dirname (car poss)))
853 (car poss)))))
854 t)))))
856 (defun PC-chop-word (new old)
857 (let ((i -1)
858 (j -1))
859 (while (and (setq i (string-match PC-delim-regex old (1+ i)))
860 (setq j (string-match PC-delim-regex new (1+ j)))))
861 (if (and j
862 (or (not PC-word-failed-flag)
863 (setq j (string-match PC-delim-regex new (1+ j)))))
864 (substring new 0 (1+ j))
865 new)))
867 (defvar PC-not-minibuffer nil)
869 (defun PC-temp-minibuffer-message (message)
870 "A Lisp version of `temp_minibuffer_message' from minibuf.c."
871 (cond (PC-not-minibuffer
872 (message message)
873 (sit-for 2)
874 (message ""))
875 ((fboundp 'temp-minibuffer-message)
876 (temp-minibuffer-message message))
878 (let ((point-max (point-max)))
879 (save-excursion
880 (goto-char point-max)
881 (insert message))
882 (let ((inhibit-quit t))
883 (sit-for 2)
884 (delete-region point-max (point-max))
885 (when quit-flag
886 (setq quit-flag nil
887 unread-command-events '(7))))))))
889 ;; Does not need to be buffer-local (?) because only used when one
890 ;; PC-l-c-s immediately follows another.
891 (defvar PC-lisp-complete-end nil
892 "Internal variable used by `PC-lisp-complete-symbol'.")
894 (defun PC-lisp-complete-symbol ()
895 "Perform completion on Lisp symbol preceding point.
896 That symbol is compared against the symbols that exist
897 and any additional characters determined by what is there
898 are inserted.
899 If the symbol starts just after an open-parenthesis,
900 only symbols with function definitions are considered.
901 Otherwise, all symbols with function definitions, values
902 or properties are considered."
903 (interactive)
904 (let* ((end
905 (save-excursion
906 (with-syntax-table lisp-mode-syntax-table
907 (skip-syntax-forward "_w")
908 (point))))
909 (beg (save-excursion
910 (with-syntax-table lisp-mode-syntax-table
911 (backward-sexp 1)
912 (while (= (char-syntax (following-char)) ?\')
913 (forward-char 1))
914 (point))))
915 (minibuffer-completion-table obarray)
916 (minibuffer-completion-predicate
917 (if (eq (char-after (1- beg)) ?\()
918 'fboundp
919 (function (lambda (sym)
920 (or (boundp sym) (fboundp sym)
921 (symbol-plist sym))))))
922 (PC-not-minibuffer t))
923 ;; http://lists.gnu.org/archive/html/emacs-devel/2007-03/msg01211.html
925 ;; This deals with cases like running PC-l-c-s on "M-: (n-f".
926 ;; The first call to PC-l-c-s expands this to "(ne-f", and moves
927 ;; point to the hyphen [1]. If one calls PC-l-c-s immediately after,
928 ;; then without the last-command check, one is offered all
929 ;; completions of "(ne", which is presumably not what one wants.
931 ;; This is arguably (at least, it seems to be the existing intended
932 ;; behaviour) what one _does_ want if point has been explicitly
933 ;; positioned on the hyphen. Note that if PC-do-completion (qv) binds
934 ;; completion-base-size to nil, then completion does not replace the
935 ;; correct amount of text in such cases.
937 ;; Neither of these problems occur when using PC for filenames in the
938 ;; minibuffer, because in that case PC-do-completion is called without
939 ;; an explicit value for END, and so uses (point-max). This is fine for
940 ;; a filename, because the end of the filename must be at the end of
941 ;; the minibuffer. The same is not true for lisp symbols.
943 ;; [1] An alternate fix would be to not move point to the hyphen
944 ;; in such cases, but that would make the behaviour different from
945 ;; that for filenames. It seems PC moves point to the site of the
946 ;; first difference between the possible completions.
948 ;; Alternatively alternatively, maybe end should be computed in
949 ;; the same way as beg. That would change the behaviour though.
950 (if (equal last-command 'PC-lisp-complete-symbol)
951 (PC-do-completion nil beg PC-lisp-complete-end t)
952 (if PC-lisp-complete-end
953 (move-marker PC-lisp-complete-end end)
954 (setq PC-lisp-complete-end (copy-marker end t)))
955 (PC-do-completion nil beg end t))))
957 (defun PC-complete-as-file-name ()
958 "Perform completion on file names preceding point.
959 Environment vars are converted to their values."
960 (interactive)
961 (let* ((end (point))
962 (beg (if (re-search-backward "[^\\][ \t\n\"\`\'][^ \t\n\"\`\']"
963 (point-min) t)
964 (+ (point) 2)
965 (point-min)))
966 (minibuffer-completion-table 'PC-read-file-name-internal)
967 (minibuffer-completion-predicate "")
968 (PC-not-minibuffer t))
969 (goto-char end)
970 (PC-do-completion nil beg end)))
972 ;; Use the shell to do globbing.
973 ;; This could now use file-expand-wildcards instead.
975 (defun PC-expand-many-files (name)
976 (with-current-buffer (generate-new-buffer " *Glob Output*")
977 (erase-buffer)
978 (when (and (file-name-absolute-p name)
979 (not (file-directory-p default-directory)))
980 ;; If the current working directory doesn't exist `shell-command'
981 ;; signals an error. So if the file names we're looking for don't
982 ;; depend on the working directory, switch to a valid directory first.
983 (setq default-directory "/"))
984 (shell-command (concat "echo " name) t)
985 (goto-char (point-min))
986 ;; CSH-style shells were known to output "No match", whereas
987 ;; SH-style shells tend to simply output `name' when no match is found.
988 (if (looking-at (concat ".*No match\\|\\(^\\| \\)\\("
989 (regexp-quote name)
990 "\\|"
991 (regexp-quote (expand-file-name name))
992 "\\)\\( \\|$\\)"))
994 (insert "(\"")
995 (while (search-forward " " nil t)
996 (delete-backward-char 1)
997 (insert "\" \""))
998 (goto-char (point-max))
999 (delete-backward-char 1)
1000 (insert "\")")
1001 (goto-char (point-min))
1002 (let ((files (read (current-buffer))) (p nil))
1003 (kill-buffer (current-buffer))
1004 (or (equal completion-ignored-extensions PC-ignored-extensions)
1005 (setq PC-ignored-regexp
1006 (concat "\\("
1007 (mapconcat
1008 'regexp-quote
1009 (setq PC-ignored-extensions
1010 completion-ignored-extensions)
1011 "\\|")
1012 "\\)\\'")))
1013 (setq p nil)
1014 (while files
1015 ;; This whole process of going through to shell, to echo, and
1016 ;; finally parsing the output is a hack. It breaks as soon as
1017 ;; there are spaces in the file names or when the no-match
1018 ;; message changes. To make up for it, we check that what we read
1019 ;; indeed exists, so we may miss some files, but we at least won't
1020 ;; list non-existent ones.
1021 (or (not (file-exists-p (car files)))
1022 (string-match PC-ignored-regexp (car files))
1023 (setq p (cons (car files) p)))
1024 (setq files (cdr files)))
1025 p))))
1027 ;; Facilities for loading C header files. This is independent from the
1028 ;; main completion code. See also the variable `PC-include-file-path'
1029 ;; at top of this file.
1031 (defun PC-look-for-include-file ()
1032 (if (string-match "[\"<]\\([^\"<>]*\\)[\">]?$" (buffer-file-name))
1033 (let ((name (substring (buffer-file-name)
1034 (match-beginning 1) (match-end 1)))
1035 (punc (aref (buffer-file-name) (match-beginning 0)))
1036 (path nil)
1037 new-buf)
1038 (kill-buffer (current-buffer))
1039 (if (equal name "")
1040 (with-current-buffer (car (buffer-list))
1041 (save-excursion
1042 (beginning-of-line)
1043 (if (looking-at
1044 "[ \t]*#[ \t]*include[ \t]+[<\"]\\(.+\\)[>\"][ \t]*[\n/]")
1045 (setq name (buffer-substring (match-beginning 1)
1046 (match-end 1))
1047 punc (char-after (1- (match-beginning 1))))
1048 ;; Suggested by Frank Siebenlist:
1049 (if (or (looking-at
1050 "[ \t]*([ \t]*load[ \t]+\"\\([^\"]+\\)\"")
1051 (looking-at
1052 "[ \t]*([ \t]*load-library[ \t]+\"\\([^\"]+\\)\"")
1053 (looking-at
1054 "[ \t]*([ \t]*require[ \t]+'\\([^\t )]+\\)[\t )]"))
1055 (progn
1056 (setq name (buffer-substring (match-beginning 1)
1057 (match-end 1))
1058 punc ?\<
1059 path load-path)
1060 (if (string-match "\\.elc$" name)
1061 (setq name (substring name 0 -1))
1062 (or (string-match "\\.el$" name)
1063 (setq name (concat name ".el")))))
1064 (error "Not on an #include line"))))))
1065 (or (string-match "\\.[[:alnum:]]+$" name)
1066 (setq name (concat name ".h")))
1067 (if (eq punc ?\<)
1068 (let ((path (or path (PC-include-file-path))))
1069 (while (and path
1070 (not (file-exists-p
1071 (concat (file-name-as-directory (car path))
1072 name))))
1073 (setq path (cdr path)))
1074 (if path
1075 (setq name (concat (file-name-as-directory (car path)) name))
1076 (error "No such include file: <%s>" name)))
1077 (let ((dir (with-current-buffer (car (buffer-list))
1078 default-directory)))
1079 (if (file-exists-p (concat dir name))
1080 (setq name (concat dir name))
1081 (error "No such include file: `%s'" name))))
1082 (setq new-buf (get-file-buffer name))
1083 (if new-buf
1084 ;; no need to verify last-modified time for this!
1085 (set-buffer new-buf)
1086 (set-buffer (create-file-buffer name))
1087 (erase-buffer)
1088 (insert-file-contents name t))
1089 ;; Returning non-nil with the new buffer current
1090 ;; is sufficient to tell find-file to use it.
1092 nil))
1094 (defun PC-include-file-path ()
1095 (or PC-include-file-path
1096 (let ((env (getenv "INCPATH"))
1097 (path nil)
1098 pos)
1099 (or env (error "No include file path specified"))
1100 (while (setq pos (string-match ":[^:]+$" env))
1101 (setq path (cons (substring env (1+ pos)) path)
1102 env (substring env 0 pos)))
1103 path)))
1105 ;; This is adapted from lib-complete.el, by Mike Williams.
1106 (defun PC-include-file-all-completions (file search-path &optional full)
1107 "Return all completions for FILE in any directory on SEARCH-PATH.
1108 If optional third argument FULL is non-nil, returned pathnames should be
1109 absolute rather than relative to some directory on the SEARCH-PATH."
1110 (setq search-path
1111 (mapcar (lambda (dir)
1112 (if dir (file-name-as-directory dir) default-directory))
1113 search-path))
1114 (if (file-name-absolute-p file)
1115 ;; It's an absolute file name, so don't need search-path
1116 (progn
1117 (setq file (expand-file-name file))
1118 (file-name-all-completions
1119 (file-name-nondirectory file) (file-name-directory file)))
1120 (let ((subdir (file-name-directory file))
1121 (ndfile (file-name-nondirectory file))
1122 file-lists)
1123 ;; Append subdirectory part to each element of search-path
1124 (if subdir
1125 (setq search-path
1126 (mapcar (lambda (dir) (concat dir subdir))
1127 search-path)
1128 file ))
1129 ;; Make list of completions in each directory on search-path
1130 (while search-path
1131 (let* ((dir (car search-path))
1132 (subdir (if full dir subdir)))
1133 (if (file-directory-p dir)
1134 (progn
1135 (setq file-lists
1136 (cons
1137 (mapcar (lambda (file) (concat subdir file))
1138 (file-name-all-completions ndfile
1139 (car search-path)))
1140 file-lists))))
1141 (setq search-path (cdr search-path))))
1142 ;; Compress out duplicates while building complete list (slloooow!)
1143 (let ((sorted (sort (apply 'nconc file-lists)
1144 (lambda (x y) (not (string-lessp x y)))))
1145 compressed)
1146 (while sorted
1147 (if (equal (car sorted) (car compressed)) nil
1148 (setq compressed (cons (car sorted) compressed)))
1149 (setq sorted (cdr sorted)))
1150 compressed))))
1152 (defun PC-read-file-name-internal (string dir action)
1153 "Extend `read-file-name-internal' to handle include files.
1154 This is only used by "
1155 (if (string-match "<\\([^\"<>]*\\)>?\\'" string)
1156 (let* ((name (match-string 1 string))
1157 (str2 (substring string (match-beginning 0)))
1158 (completion-table
1159 (mapcar (lambda (x)
1160 (format (if (string-match "/\\'" x) "<%s" "<%s>") x))
1161 (PC-include-file-all-completions
1162 name (PC-include-file-path)))))
1163 (cond
1164 ((not completion-table) nil)
1165 ((eq action 'lambda) (test-completion str2 completion-table nil))
1166 ((eq action nil) (PC-try-completion str2 completion-table nil))
1167 ((eq action t) (all-completions str2 completion-table nil))))
1168 (read-file-name-internal string dir action)))
1171 (provide 'complete)
1173 ;; arch-tag: fc7e2768-ff44-4e22-b579-4d825b968458
1174 ;;; complete.el ends here