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[emacs.git] / lisp / complete.el
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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 ;;;###autoload
102 (defcustom partial-completion-mode nil
103 "Toggle Partial Completion mode.
104 When Partial Completion mode is enabled, TAB (or M-TAB if `PC-meta-flag' is
105 nil) is enhanced so that if some string is divided into words and each word is
106 delimited by a character in `PC-word-delimiters', partial words are completed
107 as much as possible and `*' characters are treated likewise in file names.
108 This variable should be set only with \\[customize], which is equivalent
109 to using the function `partial-completion-mode'."
110 :set (lambda (symbol value)
111 (partial-completion-mode (or value 0)))
112 :initialize 'custom-initialize-default
113 :type 'boolean
114 :group 'partial-completion
115 :require 'complete)
117 (defcustom PC-first-char 'find-file
118 "*Control how the first character of a string is to be interpreted.
119 If nil, the first character of a string is not taken literally if it is a word
120 delimiter, so that \".e\" matches \"*.e*\".
121 If t, the first character of a string is always taken literally even if it is a
122 word delimiter, so that \".e\" matches \".e*\".
123 If non-nil and non-t, the first character is taken literally only for file name
124 completion."
125 :type '(choice (const :tag "delimiter" nil)
126 (const :tag "literal" t)
127 (other :tag "find-file" find-file))
128 :group 'partial-completion)
130 (defcustom PC-meta-flag t
131 "*If non-nil, TAB means PC completion and M-TAB means normal completion.
132 Otherwise, TAB means normal completion and M-TAB means Partial Completion."
133 :type 'boolean
134 :group 'partial-completion)
136 (defcustom PC-word-delimiters "-_. "
137 "*A string of characters treated as word delimiters for completion.
138 Some arcane rules:
139 If `]' is in this string, it must come first.
140 If `^' is in this string, it must not come first.
141 If `-' is in this string, it must come first or right after `]'.
142 In other words, if S is this string, then `[S]' must be a legal Emacs regular
143 expression (not containing character ranges like `a-z')."
144 :type 'string
145 :group 'partial-completion)
147 (defcustom PC-include-file-path '("/usr/include" "/usr/local/include")
148 "*A list of directories in which to look for include files.
149 If nil, means use the colon-separated path in the variable $INCPATH instead."
150 :type '(repeat directory)
151 :group 'partial-completion)
153 (defcustom PC-disable-includes nil
154 "*If non-nil, include-file support in \\[find-file] is disabled."
155 :type 'boolean
156 :group 'partial-completion)
158 (defvar PC-default-bindings t
159 "If non-nil, default partial completion key bindings are suppressed.")
161 (defvar PC-env-vars-alist nil
162 "A list of the environment variable names and values.")
165 (defvar PC-old-read-file-name-internal nil)
167 ;;;###autoload
168 (defun partial-completion-mode (&optional arg)
169 "Toggle Partial Completion mode.
170 With prefix ARG, turn Partial Completion mode on if ARG is positive.
172 When Partial Completion mode is enabled, TAB (or M-TAB if `PC-meta-flag' is
173 nil) is enhanced so that if some string is divided into words and each word is
174 delimited by a character in `PC-word-delimiters', partial words are completed
175 as much as possible.
177 For example, M-x p-c-m expands to M-x partial-completion-mode since no other
178 command begins with that sequence of characters, and
179 \\[find-file] f_b.c TAB might complete to foo_bar.c if that file existed and no
180 other file in that directory begin with that sequence of characters.
182 Unless `PC-disable-includes' is non-nil, the \"<...>\" sequence is interpreted
183 specially in \\[find-file]. For example,
184 \\[find-file] <sys/time.h> RET finds the file /usr/include/sys/time.h.
185 See also the variable `PC-include-file-path'."
186 (interactive "P")
187 (let ((on-p (if arg
188 (> (prefix-numeric-value arg) 0)
189 (not partial-completion-mode))))
190 ;; Deal with key bindings...
191 (PC-bindings on-p)
192 ;; Deal with include file feature...
193 (cond ((not on-p)
194 (remove-hook 'find-file-not-found-hooks 'PC-look-for-include-file))
195 ((not PC-disable-includes)
196 (add-hook 'find-file-not-found-hooks 'PC-look-for-include-file)))
197 ;; ... with some underhand redefining.
198 (cond ((and (not on-p) (functionp PC-old-read-file-name-internal))
199 (fset 'read-file-name-internal PC-old-read-file-name-internal))
200 ((and (not PC-disable-includes) (not PC-old-read-file-name-internal))
201 (setq PC-old-read-file-name-internal
202 (symbol-function 'read-file-name-internal))
203 (fset 'read-file-name-internal
204 'PC-read-include-file-name-internal)))
205 (when (and on-p (null PC-env-vars-alist))
206 (setq PC-env-vars-alist
207 (mapcar (lambda (string)
208 (let ((d (string-match "=" string)))
209 (cons (concat "$" (substring string 0 d))
210 (and d (substring string (1+ d))))))
211 process-environment)))
212 ;; Finally set the mode variable.
213 (setq partial-completion-mode on-p)))
215 (defun PC-bindings (bind)
216 (let ((completion-map minibuffer-local-completion-map)
217 (must-match-map minibuffer-local-must-match-map))
218 (cond ((not bind)
219 ;; These bindings are the default bindings. It would be better to
220 ;; restore the previous bindings.
221 (define-key completion-map "\t" 'minibuffer-complete)
222 (define-key completion-map " " 'minibuffer-complete-word)
223 (define-key completion-map "?" 'minibuffer-completion-help)
225 (define-key must-match-map "\t" 'minibuffer-complete)
226 (define-key must-match-map " " 'minibuffer-complete-word)
227 (define-key must-match-map "\r" 'minibuffer-complete-and-exit)
228 (define-key must-match-map "\n" 'minibuffer-complete-and-exit)
229 (define-key must-match-map "?" 'minibuffer-completion-help)
231 (define-key global-map "\e\t" 'complete-symbol))
232 (PC-default-bindings
233 (define-key completion-map "\t" 'PC-complete)
234 (define-key completion-map " " 'PC-complete-word)
235 (define-key completion-map "?" 'PC-completion-help)
237 (define-key completion-map "\e\t" 'PC-complete)
238 (define-key completion-map "\e " 'PC-complete-word)
239 (define-key completion-map "\e\r" 'PC-force-complete-and-exit)
240 (define-key completion-map "\e\n" 'PC-force-complete-and-exit)
241 (define-key completion-map "\e?" 'PC-completion-help)
243 (define-key must-match-map "\t" 'PC-complete)
244 (define-key must-match-map " " 'PC-complete-word)
245 (define-key must-match-map "\r" 'PC-complete-and-exit)
246 (define-key must-match-map "\n" 'PC-complete-and-exit)
247 (define-key must-match-map "?" 'PC-completion-help)
249 (define-key must-match-map "\e\t" 'PC-complete)
250 (define-key must-match-map "\e " 'PC-complete-word)
251 (define-key must-match-map "\e\r" 'PC-complete-and-exit)
252 (define-key must-match-map "\e\n" 'PC-complete-and-exit)
253 (define-key must-match-map "\e?" 'PC-completion-help)
255 (define-key global-map "\e\t" 'PC-lisp-complete-symbol)))))
257 ;; Because the `partial-completion-mode' option is defined before the
258 ;; `partial-completion-mode' command and its callee, we give the former a
259 ;; default `:initialize' keyword value. Otherwise, the `:set' keyword value
260 ;; would be called to initialise the variable value, and that would call the
261 ;; as-yet undefined `partial-completion-mode' function.
262 ;; Since the default `:initialize' keyword value (obviously) does not turn on
263 ;; Partial Completion Mode, we do that here, once the `partial-completion-mode'
264 ;; function and its callee are defined.
265 (when partial-completion-mode
266 (partial-completion-mode t))
268 (defun PC-complete ()
269 "Like minibuffer-complete, but allows \"b--di\"-style abbreviations.
270 For example, \"M-x b--di\" would match `byte-recompile-directory', or any
271 name which consists of three or more words, the first beginning with \"b\"
272 and the third beginning with \"di\".
274 The pattern \"b--d\" is ambiguous for `byte-recompile-directory' and
275 `beginning-of-defun', so this would produce a list of completions
276 just like when normal Emacs completions are ambiguous.
278 Word-delimiters for the purposes of Partial Completion are \"-\", \"_\",
279 \".\", and SPC."
280 (interactive)
281 (if (PC-was-meta-key)
282 (minibuffer-complete)
283 ;; If the previous command was not this one,
284 ;; never scroll, always retry completion.
285 (or (eq last-command this-command)
286 (setq minibuffer-scroll-window nil))
287 (let ((window minibuffer-scroll-window))
288 ;; If there's a fresh completion window with a live buffer,
289 ;; and this command is repeated, scroll that window.
290 (if (and window (window-buffer window)
291 (buffer-name (window-buffer window)))
292 (save-excursion
293 (set-buffer (window-buffer window))
294 (if (pos-visible-in-window-p (point-max) window)
295 (set-window-start window (point-min) nil)
296 (scroll-other-window)))
297 (PC-do-completion nil)))))
300 (defun PC-complete-word ()
301 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
302 See `PC-complete' for details.
303 This can be bound to other keys, like `-' and `.', if you wish."
304 (interactive)
305 (if (eq (PC-was-meta-key) PC-meta-flag)
306 (if (eq last-command-char ? )
307 (minibuffer-complete-word)
308 (self-insert-command 1))
309 (self-insert-command 1)
310 (if (eobp)
311 (PC-do-completion 'word))))
314 (defun PC-complete-space ()
315 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
316 See `PC-complete' for details.
317 This is suitable for binding to other keys which should act just like SPC."
318 (interactive)
319 (if (eq (PC-was-meta-key) PC-meta-flag)
320 (minibuffer-complete-word)
321 (insert " ")
322 (if (eobp)
323 (PC-do-completion 'word))))
326 (defun PC-complete-and-exit ()
327 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
328 See `PC-complete' for details."
329 (interactive)
330 (if (eq (PC-was-meta-key) PC-meta-flag)
331 (minibuffer-complete-and-exit)
332 (PC-do-complete-and-exit)))
334 (defun PC-force-complete-and-exit ()
335 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
336 See `PC-complete' for details."
337 (interactive)
338 (let ((minibuffer-completion-confirm nil))
339 (PC-do-complete-and-exit)))
341 (defun PC-do-complete-and-exit ()
342 (if (= (point-max) (minibuffer-prompt-end)) ; Duplicate the "bug" that Info-menu relies on...
343 (exit-minibuffer)
344 (let ((flag (PC-do-completion 'exit)))
345 (and flag
346 (if (or (eq flag 'complete)
347 (not minibuffer-completion-confirm))
348 (exit-minibuffer)
349 (PC-temp-minibuffer-message " [Confirm]"))))))
352 (defun PC-completion-help ()
353 "Like `minibuffer-completion-help', but allows \"b--di\"-style abbreviations.
354 See `PC-complete' for details."
355 (interactive)
356 (if (eq (PC-was-meta-key) PC-meta-flag)
357 (minibuffer-completion-help)
358 (PC-do-completion 'help)))
360 (defun PC-was-meta-key ()
361 (or (/= (length (this-command-keys)) 1)
362 (let ((key (aref (this-command-keys) 0)))
363 (if (integerp key)
364 (>= key 128)
365 (not (null (memq 'meta (event-modifiers key))))))))
368 (defvar PC-ignored-extensions 'empty-cache)
369 (defvar PC-delims 'empty-cache)
370 (defvar PC-ignored-regexp nil)
371 (defvar PC-word-failed-flag nil)
372 (defvar PC-delim-regex nil)
373 (defvar PC-ndelims-regex nil)
374 (defvar PC-delims-list nil)
376 (defvar PC-completion-as-file-name-predicate
377 (function
378 (lambda ()
379 (memq minibuffer-completion-table
380 '(read-file-name-internal read-directory-name-internal))))
381 "A function testing whether a minibuffer completion now will work filename-style.
382 The function takes no arguments, and typically looks at the value
383 of `minibuffer-completion-table' and the minibuffer contents.")
385 (defun PC-do-completion (&optional mode beg end)
386 (or beg (setq beg (minibuffer-prompt-end)))
387 (or end (setq end (point-max)))
388 (let* ((table minibuffer-completion-table)
389 (pred minibuffer-completion-predicate)
390 (filename (funcall PC-completion-as-file-name-predicate))
391 (dirname nil)
392 (dirlength 0)
393 (str (buffer-substring beg end))
394 (incname (and filename (string-match "<\\([^\"<>]*\\)>?$" str)))
395 (ambig nil)
396 basestr
397 env-on
398 regex
399 p offset
400 (poss nil)
401 helpposs
402 (case-fold-search completion-ignore-case))
404 ;; Check if buffer contents can already be considered complete
405 (if (and (eq mode 'exit)
406 (PC-is-complete-p str table pred))
407 'complete
409 ;; Do substitutions in directory names
410 (and filename
411 (setq basestr (or (file-name-directory str) ""))
412 (setq dirlength (length basestr))
413 ;; Do substitutions in directory names
414 (setq p (substitute-in-file-name basestr))
415 (not (string-equal basestr p))
416 (setq str (concat p (file-name-nondirectory str)))
417 (progn
418 (delete-region beg end)
419 (insert str)
420 (setq end (+ beg (length str)))))
422 ;; Prepare various delimiter strings
423 (or (equal PC-word-delimiters PC-delims)
424 (setq PC-delims PC-word-delimiters
425 PC-delim-regex (concat "[" PC-delims "]")
426 PC-ndelims-regex (concat "[^" PC-delims "]*")
427 PC-delims-list (append PC-delims nil)))
429 ;; Look for wildcard expansions in directory name
430 (and filename
431 (string-match "\\*.*/" str)
432 (let ((pat str)
433 files)
434 (setq p (1+ (string-match "/[^/]*\\'" pat)))
435 (while (setq p (string-match PC-delim-regex pat p))
436 (setq pat (concat (substring pat 0 p)
438 (substring pat p))
439 p (+ p 2)))
440 (setq files (PC-expand-many-files (concat pat "*")))
441 (if files
442 (let ((dir (file-name-directory (car files)))
443 (p files))
444 (while (and (setq p (cdr p))
445 (equal dir (file-name-directory (car p)))))
446 (if p
447 (setq filename nil table nil pred nil
448 ambig t)
449 (delete-region beg end)
450 (setq str (concat dir (file-name-nondirectory str)))
451 (insert str)
452 (setq end (+ beg (length str)))))
453 (setq filename nil table nil pred nil))))
455 ;; Strip directory name if appropriate
456 (if filename
457 (if incname
458 (setq basestr (substring str incname)
459 dirname (substring str 0 incname))
460 (setq basestr (file-name-nondirectory str)
461 dirname (file-name-directory str))
462 ;; Make sure str is consistent with its directory and basename
463 ;; parts. This is important on DOZe'NT systems when str only
464 ;; includes a drive letter, like in "d:".
465 (setq str (concat dirname basestr)))
466 (setq basestr str))
468 ;; Convert search pattern to a standard regular expression
469 (setq regex (regexp-quote basestr)
470 offset (if (and (> (length regex) 0)
471 (not (eq (aref basestr 0) ?\*))
472 (or (eq PC-first-char t)
473 (and PC-first-char filename))) 1 0)
474 p offset)
475 (while (setq p (string-match PC-delim-regex regex p))
476 (if (eq (aref regex p) ? )
477 (setq regex (concat (substring regex 0 p)
478 PC-ndelims-regex
479 PC-delim-regex
480 (substring regex (1+ p)))
481 p (+ p (length PC-ndelims-regex) (length PC-delim-regex)))
482 (let ((bump (if (memq (aref regex p)
483 '(?$ ?^ ?\. ?* ?+ ?? ?[ ?] ?\\))
484 -1 0)))
485 (setq regex (concat (substring regex 0 (+ p bump))
486 PC-ndelims-regex
487 (substring regex (+ p bump)))
488 p (+ p (length PC-ndelims-regex) 1)))))
489 (setq p 0)
490 (if filename
491 (while (setq p (string-match "\\\\\\*" regex p))
492 (setq regex (concat (substring regex 0 p)
493 "[^/]*"
494 (substring regex (+ p 2))))))
495 ;;(setq the-regex regex)
496 (setq regex (concat "\\`" regex))
498 (and (> (length basestr) 0)
499 (= (aref basestr 0) ?$)
500 (setq env-on t
501 table PC-env-vars-alist
502 pred nil))
504 ;; Find an initial list of possible completions
505 (if (not (setq p (string-match (concat PC-delim-regex
506 (if filename "\\|\\*" ""))
508 (+ (length dirname) offset))))
510 ;; Minibuffer contains no hyphens -- simple case!
511 (setq poss (all-completions (if env-on
512 basestr str)
513 table
514 pred))
516 ;; Use all-completions to do an initial cull. This is a big win,
517 ;; since all-completions is written in C!
518 (let ((compl (all-completions (if env-on
519 (file-name-nondirectory (substring str 0 p))
520 (substring str 0 p))
521 table
522 pred)))
523 (setq p compl)
524 (while p
525 (and (string-match regex (car p))
526 (progn
527 (set-text-properties 0 (length (car p)) '() (car p))
528 (setq poss (cons (car p) poss))))
529 (setq p (cdr p)))))
531 ;; Now we have a list of possible completions
532 (cond
534 ;; No valid completions found
535 ((null poss)
536 (if (and (eq mode 'word)
537 (not PC-word-failed-flag))
538 (let ((PC-word-failed-flag t))
539 (delete-backward-char 1)
540 (PC-do-completion 'word))
541 (beep)
542 (PC-temp-minibuffer-message (if ambig
543 " [Ambiguous dir name]"
544 (if (eq mode 'help)
545 " [No completions]"
546 " [No match]")))
547 nil))
549 ;; More than one valid completion found
550 ((or (cdr (setq helpposs poss))
551 (memq mode '(help word)))
553 ;; Handle completion-ignored-extensions
554 (and filename
555 (not (eq mode 'help))
556 (let ((p2 poss))
558 ;; Build a regular expression representing the extensions list
559 (or (equal completion-ignored-extensions PC-ignored-extensions)
560 (setq PC-ignored-regexp
561 (concat "\\("
562 (mapconcat
563 'regexp-quote
564 (setq PC-ignored-extensions
565 completion-ignored-extensions)
566 "\\|")
567 "\\)\\'")))
569 ;; Check if there are any without an ignored extension.
570 ;; Also ignore `.' and `..'.
571 (setq p nil)
572 (while p2
573 (or (string-match PC-ignored-regexp (car p2))
574 (string-match "\\(\\`\\|/\\)[.][.]?/?\\'" (car p2))
575 (setq p (cons (car p2) p)))
576 (setq p2 (cdr p2)))
578 ;; If there are "good" names, use them
579 (and p (setq poss p))))
581 ;; Is the actual string one of the possible completions?
582 (setq p (and (not (eq mode 'help)) poss))
583 (while (and p
584 (not (string-equal (car p) basestr)))
585 (setq p (cdr p)))
586 (and p (null mode)
587 (PC-temp-minibuffer-message " [Complete, but not unique]"))
588 (if (and p
589 (not (and (null mode)
590 (eq this-command last-command))))
593 ;; If ambiguous, try for a partial completion
594 (let ((improved nil)
595 prefix
596 (pt nil)
597 (skip "\\`"))
599 ;; Check if next few letters are the same in all cases
600 (if (and (not (eq mode 'help))
601 (setq prefix (try-completion "" (mapcar 'list poss))))
602 (let ((first t) i)
603 (if (eq mode 'word)
604 (setq prefix (PC-chop-word prefix basestr)))
605 (goto-char (+ beg (length dirname)))
606 (while (and (progn
607 (setq i 0)
608 (while (< i (length prefix))
609 (if (and (< (point) end)
610 (eq (aref prefix i)
611 (following-char)))
612 (forward-char 1)
613 (if (and (< (point) end)
614 (or (and (looking-at " ")
615 (memq (aref prefix i)
616 PC-delims-list))
617 (eq (downcase (aref prefix i))
618 (downcase
619 (following-char)))))
620 (progn
621 (delete-char 1)
622 (setq end (1- end)))
623 (and filename (looking-at "\\*")
624 (progn
625 (delete-char 1)
626 (setq end (1- end))))
627 (setq improved t))
628 (insert (substring prefix i (1+ i)))
629 (setq end (1+ end)))
630 (setq i (1+ i)))
631 (or pt (equal (point) beg)
632 (setq pt (point)))
633 (looking-at PC-delim-regex))
634 (setq skip (concat skip
635 (regexp-quote prefix)
636 PC-ndelims-regex)
637 prefix (try-completion
639 (mapcar
640 (function
641 (lambda (x)
642 (list
643 (and (string-match skip x)
644 (substring
646 (match-end 0))))))
647 poss)))
648 (or (> i 0) (> (length prefix) 0))
649 (or (not (eq mode 'word))
650 (and first (> (length prefix) 0)
651 (setq first nil
652 prefix (substring prefix 0 1))))))
653 (goto-char (if (eq mode 'word) end
654 (or pt beg)))))
656 (if (and (eq mode 'word)
657 (not PC-word-failed-flag))
659 (if improved
661 ;; We changed it... would it be complete without the space?
662 (if (PC-is-complete-p (buffer-substring 1 (1- end))
663 table pred)
664 (delete-region (1- end) end)))
666 (if improved
668 ;; We changed it... enough to be complete?
669 (and (eq mode 'exit)
670 (PC-is-complete-p (field-string) table pred))
672 ;; If totally ambiguous, display a list of completions
673 (if (or completion-auto-help
674 (eq mode 'help))
675 (with-output-to-temp-buffer "*Completions*"
676 (display-completion-list (sort helpposs 'string-lessp))
677 (save-excursion
678 (set-buffer standard-output)
679 ;; Record which part of the buffer we are completing
680 ;; so that choosing a completion from the list
681 ;; knows how much old text to replace.
682 (setq completion-base-size dirlength)))
683 (PC-temp-minibuffer-message " [Next char not unique]"))
684 nil)))))
686 ;; Only one possible completion
688 (if (and (equal basestr (car poss))
689 (not (and env-on filename)))
690 (if (null mode)
691 (PC-temp-minibuffer-message " [Sole completion]"))
692 (delete-region beg end)
693 (insert (format "%s"
694 (if filename
695 (substitute-in-file-name (concat dirname (car poss)))
696 (car poss)))))
697 t)))))
700 (defun PC-is-complete-p (str table pred)
701 (let ((res (if (listp table)
702 (assoc str table)
703 (if (vectorp table)
704 (or (equal str "nil") ; heh, heh, heh
705 (intern-soft str table))
706 (funcall table str pred 'lambda)))))
707 (and res
708 (or (not pred)
709 (and (not (listp table)) (not (vectorp table)))
710 (funcall pred res))
711 res)))
713 (defun PC-chop-word (new old)
714 (let ((i -1)
715 (j -1))
716 (while (and (setq i (string-match PC-delim-regex old (1+ i)))
717 (setq j (string-match PC-delim-regex new (1+ j)))))
718 (if (and j
719 (or (not PC-word-failed-flag)
720 (setq j (string-match PC-delim-regex new (1+ j)))))
721 (substring new 0 (1+ j))
722 new)))
724 (defvar PC-not-minibuffer nil)
726 (defun PC-temp-minibuffer-message (message)
727 "A Lisp version of `temp_minibuffer_message' from minibuf.c."
728 (cond (PC-not-minibuffer
729 (message message)
730 (sit-for 2)
731 (message ""))
732 ((fboundp 'temp-minibuffer-message)
733 (temp-minibuffer-message message))
735 (let ((point-max (point-max)))
736 (save-excursion
737 (goto-char point-max)
738 (insert message))
739 (let ((inhibit-quit t))
740 (sit-for 2)
741 (delete-region point-max (point-max))
742 (when quit-flag
743 (setq quit-flag nil
744 unread-command-events '(7))))))))
747 (defun PC-lisp-complete-symbol ()
748 "Perform completion on Lisp symbol preceding point.
749 That symbol is compared against the symbols that exist
750 and any additional characters determined by what is there
751 are inserted.
752 If the symbol starts just after an open-parenthesis,
753 only symbols with function definitions are considered.
754 Otherwise, all symbols with function definitions, values
755 or properties are considered."
756 (interactive)
757 (let* ((end (point))
758 (buffer-syntax (syntax-table))
759 (beg (unwind-protect
760 (save-excursion
761 (if lisp-mode-syntax-table
762 (set-syntax-table lisp-mode-syntax-table))
763 (backward-sexp 1)
764 (while (= (char-syntax (following-char)) ?\')
765 (forward-char 1))
766 (point))
767 (set-syntax-table buffer-syntax)))
768 (minibuffer-completion-table obarray)
769 (minibuffer-completion-predicate
770 (if (eq (char-after (1- beg)) ?\()
771 'fboundp
772 (function (lambda (sym)
773 (or (boundp sym) (fboundp sym)
774 (symbol-plist sym))))))
775 (PC-not-minibuffer t))
776 (PC-do-completion nil beg end)))
778 (defun PC-complete-as-file-name ()
779 "Perform completion on file names preceding point.
780 Environment vars are converted to their values."
781 (interactive)
782 (let* ((end (point))
783 (beg (if (re-search-backward "[^\\][ \t\n\"\`\'][^ \t\n\"\`\']"
784 (point-min) t)
785 (+ (point) 2)
786 (point-min)))
787 (minibuffer-completion-table 'read-file-name-internal)
788 (minibuffer-completion-predicate "")
789 (PC-not-minibuffer t))
790 (goto-char end)
791 (PC-do-completion nil beg end)))
793 ;;; Use the shell to do globbing.
794 ;;; This could now use file-expand-wildcards instead.
796 (defun PC-expand-many-files (name)
797 (save-excursion
798 (set-buffer (generate-new-buffer " *Glob Output*"))
799 (erase-buffer)
800 (shell-command (concat "echo " name) t)
801 (goto-char (point-min))
802 (if (looking-at ".*No match")
804 (insert "(\"")
805 (while (search-forward " " nil t)
806 (delete-backward-char 1)
807 (insert "\" \""))
808 (goto-char (point-max))
809 (delete-backward-char 1)
810 (insert "\")")
811 (goto-char (point-min))
812 (let ((files (read (current-buffer))) (p nil))
813 (kill-buffer (current-buffer))
814 (or (equal completion-ignored-extensions PC-ignored-extensions)
815 (setq PC-ignored-regexp
816 (concat "\\("
817 (mapconcat
818 'regexp-quote
819 (setq PC-ignored-extensions
820 completion-ignored-extensions)
821 "\\|")
822 "\\)\\'")))
823 (setq p nil)
824 (while files
825 (or (string-match PC-ignored-regexp (car files))
826 (setq p (cons (car files) p)))
827 (setq files (cdr files)))
828 p))))
830 ;;; Facilities for loading C header files. This is independent from the
831 ;;; main completion code. See also the variable `PC-include-file-path'
832 ;;; at top of this file.
834 (defun PC-look-for-include-file ()
835 (if (string-match "[\"<]\\([^\"<>]*\\)[\">]?$" (buffer-file-name))
836 (let ((name (substring (buffer-file-name)
837 (match-beginning 1) (match-end 1)))
838 (punc (aref (buffer-file-name) (match-beginning 0)))
839 (path nil)
840 new-buf)
841 (kill-buffer (current-buffer))
842 (if (equal name "")
843 (save-excursion
844 (set-buffer (car (buffer-list)))
845 (save-excursion
846 (beginning-of-line)
847 (if (looking-at
848 "[ \t]*#[ \t]*include[ \t]+[<\"]\\(.+\\)[>\"][ \t]*[\n/]")
849 (setq name (buffer-substring (match-beginning 1)
850 (match-end 1))
851 punc (char-after (1- (match-beginning 1))))
852 ;; Suggested by Frank Siebenlist:
853 (if (or (looking-at
854 "[ \t]*([ \t]*load[ \t]+\"\\([^\"]+\\)\"")
855 (looking-at
856 "[ \t]*([ \t]*load-library[ \t]+\"\\([^\"]+\\)\"")
857 (looking-at
858 "[ \t]*([ \t]*require[ \t]+'\\([^\t )]+\\)[\t )]"))
859 (progn
860 (setq name (buffer-substring (match-beginning 1)
861 (match-end 1))
862 punc ?\<
863 path load-path)
864 (if (string-match "\\.elc$" name)
865 (setq name (substring name 0 -1))
866 (or (string-match "\\.el$" name)
867 (setq name (concat name ".el")))))
868 (error "Not on an #include line"))))))
869 (or (string-match "\\.[[:alnum:]]+$" name)
870 (setq name (concat name ".h")))
871 (if (eq punc ?\<)
872 (let ((path (or path (PC-include-file-path))))
873 (while (and path
874 (not (file-exists-p
875 (concat (file-name-as-directory (car path))
876 name))))
877 (setq path (cdr path)))
878 (if path
879 (setq name (concat (file-name-as-directory (car path)) name))
880 (error "No such include file: <%s>" name)))
881 (let ((dir (save-excursion
882 (set-buffer (car (buffer-list)))
883 default-directory)))
884 (if (file-exists-p (concat dir name))
885 (setq name (concat dir name))
886 (error "No such include file: `%s'" name))))
887 (setq new-buf (get-file-buffer name))
888 (if new-buf
889 ;; no need to verify last-modified time for this!
890 (set-buffer new-buf)
891 (setq new-buf (create-file-buffer name))
892 (set-buffer new-buf)
893 (erase-buffer)
894 (insert-file-contents name t))
895 ;; Returning non-nil with the new buffer current
896 ;; is sufficient to tell find-file to use it.
898 nil))
900 (defun PC-include-file-path ()
901 (or PC-include-file-path
902 (let ((env (getenv "INCPATH"))
903 (path nil)
904 pos)
905 (or env (error "No include file path specified"))
906 (while (setq pos (string-match ":[^:]+$" env))
907 (setq path (cons (substring env (1+ pos)) path)
908 env (substring env 0 pos)))
909 path)))
911 ;;; This is adapted from lib-complete.el, by Mike Williams.
912 (defun PC-include-file-all-completions (file search-path &optional full)
913 "Return all completions for FILE in any directory on SEARCH-PATH.
914 If optional third argument FULL is non-nil, returned pathnames should be
915 absolute rather than relative to some directory on the SEARCH-PATH."
916 (setq search-path
917 (mapcar '(lambda (dir)
918 (if dir (file-name-as-directory dir) default-directory))
919 search-path))
920 (if (file-name-absolute-p file)
921 ;; It's an absolute file name, so don't need search-path
922 (progn
923 (setq file (expand-file-name file))
924 (file-name-all-completions
925 (file-name-nondirectory file) (file-name-directory file)))
926 (let ((subdir (file-name-directory file))
927 (ndfile (file-name-nondirectory file))
928 file-lists)
929 ;; Append subdirectory part to each element of search-path
930 (if subdir
931 (setq search-path
932 (mapcar '(lambda (dir) (concat dir subdir))
933 search-path)
934 file ))
935 ;; Make list of completions in each directory on search-path
936 (while search-path
937 (let* ((dir (car search-path))
938 (subdir (if full dir subdir)))
939 (if (file-directory-p dir)
940 (progn
941 (setq file-lists
942 (cons
943 (mapcar '(lambda (file) (concat subdir file))
944 (file-name-all-completions ndfile
945 (car search-path)))
946 file-lists))))
947 (setq search-path (cdr search-path))))
948 ;; Compress out duplicates while building complete list (slloooow!)
949 (let ((sorted (sort (apply 'nconc file-lists)
950 '(lambda (x y) (not (string-lessp x y)))))
951 compressed)
952 (while sorted
953 (if (equal (car sorted) (car compressed)) nil
954 (setq compressed (cons (car sorted) compressed)))
955 (setq sorted (cdr sorted)))
956 compressed))))
958 (defun PC-read-include-file-name-internal (string dir action)
959 (if (string-match "<\\([^\"<>]*\\)>?$" string)
960 (let* ((name (substring string (match-beginning 1) (match-end 1)))
961 (str2 (substring string (match-beginning 0)))
962 (completion-table
963 (mapcar (function (lambda (x) (list (format "<%s>" x))))
964 (PC-include-file-all-completions
965 name (PC-include-file-path)))))
966 (cond
967 ((not completion-table) nil)
968 ((eq action nil) (try-completion str2 completion-table nil))
969 ((eq action t) (all-completions str2 completion-table nil))
970 ((eq action 'lambda)
971 (eq (try-completion str2 completion-table nil) t))))
972 (funcall PC-old-read-file-name-internal string dir action)))
975 (provide 'complete)
977 ;;; End.