Comment change.
[bpt/emacs.git] / lisp / complete.el
1 ;; complete.el -- partial completion mechanism plus other goodies.
2
3 ;; Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
4
5 ;; Author: Dave Gillespie <daveg@synaptics.com>
6 ;; Version: 2.02
7 ;; Special thanks to Hallvard Furuseth for his many ideas and contributions.
8
9 ;; This file is part of GNU Emacs.
10
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
15
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
20
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to
23 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24
25 ;;; Commentary:
26
27 ;; Extended completion for the Emacs minibuffer.
28 ;;
29 ;; The basic idea is that the command name or other completable text is
30 ;; divided into words and each word is completed separately, so that
31 ;; "M-x p-b" expands to "M-x print-buffer". If the entry is ambiguous
32 ;; each word is completed as much as possible and then the cursor is
33 ;; left at the first position where typing another letter will resolve
34 ;; the ambiguity.
35 ;;
36 ;; Word separators for this purpose are hyphen, space, and period.
37 ;; These would most likely occur in command names, Info menu items,
38 ;; and file names, respectively. But all word separators are treated
39 ;; alike at all times.
40 ;;
41 ;; This completion package replaces the old-style completer's key
42 ;; bindings for TAB, SPC, RET, and `?'. The old completer is still
43 ;; available on the Meta versions of those keys. If you set
44 ;; PC-meta-flag to nil, the old completion keys will be left alone
45 ;; and the partial completer will use the Meta versions of the keys.
46
47
48 ;; Usage: Load this file. Now, during completable minibuffer entry,
49 ;;
50 ;; TAB means to do a partial completion;
51 ;; SPC means to do a partial complete-word;
52 ;; RET means to do a partial complete-and-exit;
53 ;; ? means to do a partial completion-help.
54 ;;
55 ;; If you set PC-meta-flag to nil, then TAB, SPC, RET, and ? perform
56 ;; original Emacs completions, and M-TAB etc. do partial completion.
57 ;; To do this, put the command,
58 ;;
59 ;; (setq PC-meta-flag nil)
60 ;;
61 ;; in your .emacs file. To load partial completion automatically, put
62 ;;
63 ;; (load "complete")
64 ;;
65 ;; in your .emacs file, too. Things will be faster if you byte-compile
66 ;; this file when you install it.
67 ;;
68 ;; As an extra feature, in cases where RET would not normally
69 ;; complete (such as `C-x b'), the M-RET key will always do a partial
70 ;; complete-and-exit. Thus `C-x b f.c RET' will select or create a
71 ;; buffer called "f.c", but `C-x b f.c M-RET' will select the existing
72 ;; buffer whose name matches that pattern (perhaps "filing.c").
73 ;; (PC-meta-flag does not affect this behavior; M-RET used to be
74 ;; undefined in this situation.)
75 ;;
76 ;; The regular M-TAB (lisp-complete-symbol) command also supports
77 ;; partial completion in this package.
78
79 ;; This package also contains a wildcard feature for C-x C-f (find-file).
80 ;; For example, `C-x C-f *.c RET' loads all .c files at once, exactly
81 ;; as if you had typed C-x C-f separately for each file. Completion
82 ;; is supported in connection with wildcards. Currently only the `*'
83 ;; wildcard character works.
84
85 ;; File name completion does not do partial completion of directories
86 ;; on the path, e.g., "/u/b/f" will not complete to "/usr/bin/foo",
87 ;; but you can put *'s in the path to accomplish this: "/u*/b*/f".
88 ;; Stars are required for performance reasons.
89
90 ;; In addition, this package includes a feature for accessing include
91 ;; files. For example, `C-x C-f <sys/time.h> RET' reads the file
92 ;; /usr/include/sys/time.h. The variable PC-include-file-path is a
93 ;; list of directories in which to search for include files. Completion
94 ;; is supported in include file names.
95
96
97 ;;; Code:
98
99 (defvar PC-meta-flag t
100 "*If nil, TAB does normal Emacs completion and M-TAB does Partial Completion.
101 If t, TAB does Partial Completion and M-TAB does normal completion.")
102
103
104 (defvar PC-word-delimiters "-_. "
105 "*A string of characters which are to be treated as word delimiters
106 by the Partial Completion system.
107
108 Some arcane rules: If `]' is in this string it must come first.
109 If `^' is in this string it must NOT come first. If `-' is in this
110 string, it must come first or right after `]'. In other words, if
111 S is this string, then `[S]' must be a legal Emacs regular expression
112 \(not containing character ranges like `a-z').")
113
114
115 (defvar PC-first-char 'x
116 "*If t, first character of a string to be completed is always taken literally.
117 If nil, word delimiters are handled even if they appear as first character.
118 This controls whether \".e\" matches \".e*\" (t) or \"*.e*\" (nil).
119 If neither nil nor t, first char is literal only for filename completion.")
120
121
122 (defvar PC-include-file-path '("/usr/include")
123 "*List of directories in which to look for include files.
124 If this is nil, uses the colon-separated path in $INCPATH instead.")
125
126
127 (defvar PC-disable-wildcards nil
128 "Set this to non-nil to disable wildcard support in \\[find-file].")
129
130 (defvar PC-disable-includes nil
131 "Set this to non-nil to disable include-file support in \\[find-file].")
132
133
134 (defvar PC-default-bindings t
135 "Set this to nil to suppress the default partial completion key bindings.")
136
137 (if PC-default-bindings (progn
138 (define-key minibuffer-local-completion-map "\t" 'PC-complete)
139 (define-key minibuffer-local-completion-map " " 'PC-complete-word)
140 (define-key minibuffer-local-completion-map "?" 'PC-completion-help)
141
142 (define-key minibuffer-local-completion-map "\e\t" 'PC-complete)
143 (define-key minibuffer-local-completion-map "\e " 'PC-complete-word)
144 (define-key minibuffer-local-completion-map "\e\r" 'PC-force-complete-and-exit)
145 (define-key minibuffer-local-completion-map "\e\n" 'PC-force-complete-and-exit)
146 (define-key minibuffer-local-completion-map "\e?" 'PC-completion-help)
147
148 (define-key minibuffer-local-must-match-map "\t" 'PC-complete)
149 (define-key minibuffer-local-must-match-map " " 'PC-complete-word)
150 (define-key minibuffer-local-must-match-map "\r" 'PC-complete-and-exit)
151 (define-key minibuffer-local-must-match-map "\n" 'PC-complete-and-exit)
152 (define-key minibuffer-local-must-match-map "?" 'PC-completion-help)
153
154 (define-key minibuffer-local-must-match-map "\e\t" 'PC-complete)
155 (define-key minibuffer-local-must-match-map "\e " 'PC-complete-word)
156 (define-key minibuffer-local-must-match-map "\e\r" 'PC-complete-and-exit)
157 (define-key minibuffer-local-must-match-map "\e\n" 'PC-complete-and-exit)
158 (define-key minibuffer-local-must-match-map "\e?" 'PC-completion-help)
159
160 (define-key global-map "\e\t" 'PC-lisp-complete-symbol)
161 ))
162
163
164 (defun PC-complete ()
165 "Like minibuffer-complete, but allows \"b--di\"-style abbreviations.
166 For example, \"M-x b--di\" would match `byte-recompile-directory', or any
167 name which consists of three or more words, the first beginning with \"b\"
168 and the third beginning with \"di\".
169
170 The pattern \"b--d\" is ambiguous for `byte-recompile-directory' and
171 `beginning-of-defun', so this would produce a list of completions
172 just like when normal Emacs completions are ambiguous.
173
174 Word-delimiters for the purposes of Partial Completion are \"-\", \"_\",
175 \".\", and SPC."
176 (interactive)
177 (if (PC-was-meta-key)
178 (minibuffer-complete)
179 (PC-do-completion nil)))
180
181
182 (defun PC-complete-word ()
183 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
184 See `PC-complete' for details.
185 This can be bound to other keys, like `-' and `.', if you wish."
186 (interactive)
187 (if (eq (PC-was-meta-key) PC-meta-flag)
188 (if (eq last-command-char ? )
189 (minibuffer-complete-word)
190 (self-insert-command 1))
191 (self-insert-command 1)
192 (if (eobp)
193 (PC-do-completion 'word))))
194
195
196 (defun PC-complete-space ()
197 "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
198 See `PC-complete' for details.
199 This is suitable for binding to other keys which should act just like SPC."
200 (interactive)
201 (if (eq (PC-was-meta-key) PC-meta-flag)
202 (minibuffer-complete-word)
203 (insert " ")
204 (if (eobp)
205 (PC-do-completion 'word))))
206
207
208 (defun PC-complete-and-exit ()
209 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
210 See `PC-complete' for details."
211 (interactive)
212 (if (eq (PC-was-meta-key) PC-meta-flag)
213 (minibuffer-complete-and-exit)
214 (PC-do-complete-and-exit)))
215
216 (defun PC-force-complete-and-exit ()
217 "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
218 See `PC-complete' for details."
219 (interactive)
220 (let ((minibuffer-completion-confirm nil))
221 (PC-do-complete-and-exit)))
222
223 (defun PC-do-complete-and-exit ()
224 (if (= (buffer-size) 0) ; Duplicate the "bug" that Info-menu relies on...
225 (exit-minibuffer)
226 (let ((flag (PC-do-completion 'exit)))
227 (and flag
228 (if (or (eq flag 'complete)
229 (not minibuffer-completion-confirm))
230 (exit-minibuffer)
231 (PC-temp-minibuffer-message " (Confirm)"))))))
232
233
234 (defun PC-completion-help ()
235 "Like `minibuffer-completion-help', but allows \"b--di\"-style abbreviations.
236 See `PC-complete' for details."
237 (interactive)
238 (if (eq (PC-was-meta-key) PC-meta-flag)
239 (minibuffer-completion-help)
240 (PC-do-completion 'help)))
241
242 (defun PC-was-meta-key ()
243 (or (/= (length (this-command-keys)) 1)
244 (let ((key (aref (this-command-keys) 0)))
245 (if (integerp key)
246 (>= key 128)
247 (not (null (memq 'meta (event-modifiers key))))))))
248
249
250 (defvar PC-ignored-extensions 'empty-cache)
251 (defvar PC-delims 'empty-cache)
252 (defvar PC-ignored-regexp nil)
253 (defvar PC-word-failed-flag nil)
254 (defvar PC-delim-regex nil)
255 (defvar PC-ndelims-regex nil)
256 (defvar PC-delims-list nil)
257
258 (defun PC-do-completion (&optional mode beg end)
259 (or beg (setq beg (point-min)))
260 (or end (setq end (point-max)))
261 (let* ((table minibuffer-completion-table)
262 (pred minibuffer-completion-predicate)
263 (filename (memq table '(read-file-name-internal
264 read-directory-name-internal)))
265 (dirname nil)
266 (str (buffer-substring beg end))
267 (incname (and filename (string-match "<\\([^\"<>]*\\)>?$" str)))
268 (ambig nil)
269 basestr
270 regex
271 p offset
272 (poss nil)
273 helpposs
274 (case-fold-search completion-ignore-case))
275
276 ;; Check if buffer contents can already be considered complete
277 (if (and (eq mode 'exit)
278 (PC-is-complete-p str table pred))
279 'complete
280
281 ;; Do substitutions in directory names
282 (and filename
283 (not (equal str (setq p (substitute-in-file-name str))))
284 (progn
285 (delete-region beg end)
286 (insert p)
287 (setq str p end (+ beg (length str)))))
288
289 ;; Prepare various delimiter strings
290 (or (equal PC-word-delimiters PC-delims)
291 (setq PC-delims PC-word-delimiters
292 PC-delim-regex (concat "[" PC-delims "]")
293 PC-ndelims-regex (concat "[^" PC-delims "]*")
294 PC-delims-list (append PC-delims nil)))
295
296 ;; Look for wildcard expansions in directory name
297 (and filename
298 (string-match "\\*.*/" str)
299 (let ((pat str)
300 files)
301 (setq p (1+ (string-match "/[^/]*\\'" pat)))
302 (while (setq p (string-match PC-delim-regex pat p))
303 (setq pat (concat (substring pat 0 p)
304 "*"
305 (substring pat p))
306 p (+ p 2)))
307 (setq files (PC-expand-many-files (concat pat "*")))
308 (if files
309 (let ((dir (file-name-directory (car files)))
310 (p files))
311 (while (and (setq p (cdr p))
312 (equal dir (file-name-directory (car p)))))
313 (if p
314 (setq filename nil table nil pred nil
315 ambig t)
316 (delete-region beg end)
317 (setq str (concat dir (file-name-nondirectory str)))
318 (insert str)
319 (setq end (+ beg (length str)))))
320 (setq filename nil table nil pred nil))))
321
322 ;; Strip directory name if appropriate
323 (if filename
324 (if incname
325 (setq basestr (substring str incname)
326 dirname (substring str 0 incname))
327 (setq basestr (file-name-nondirectory str)
328 dirname (file-name-directory str)))
329 (setq basestr str))
330
331 ;; Convert search pattern to a standard regular expression
332 (setq regex (regexp-quote basestr)
333 offset (if (and (> (length regex) 0)
334 (not (eq (aref basestr 0) ?\*))
335 (or (eq PC-first-char t)
336 (and PC-first-char filename))) 1 0)
337 p offset)
338 (while (setq p (string-match PC-delim-regex regex p))
339 (if (eq (aref regex p) ? )
340 (setq regex (concat (substring regex 0 p)
341 PC-ndelims-regex
342 PC-delim-regex
343 (substring regex (1+ p)))
344 p (+ p (length PC-ndelims-regex) (length PC-delim-regex)))
345 (let ((bump (if (memq (aref regex p)
346 '(?$ ?^ ?\. ?* ?+ ?? ?[ ?] ?\\))
347 -1 0)))
348 (setq regex (concat (substring regex 0 (+ p bump))
349 PC-ndelims-regex
350 (substring regex (+ p bump)))
351 p (+ p (length PC-ndelims-regex) 1)))))
352 (setq p 0)
353 (if filename
354 (while (setq p (string-match "\\\\\\*" regex p))
355 (setq regex (concat (substring regex 0 p)
356 "[^/]*"
357 (substring regex (+ p 2))))))
358 ;;(setq the-regex regex)
359 (setq regex (concat "\\`" regex))
360
361 ;; Find an initial list of possible completions
362 (if (not (setq p (string-match (concat PC-delim-regex
363 (if filename "\\|\\*" ""))
364 str
365 (+ (length dirname) offset))))
366
367 ;; Minibuffer contains no hyphens -- simple case!
368 (setq poss (all-completions str
369 table
370 pred))
371
372 ;; Use all-completions to do an initial cull. This is a big win,
373 ;; since all-completions is written in C!
374 (let ((compl (all-completions (substring str 0 p)
375 table
376 pred)))
377 (setq p compl)
378 (while p
379 (and (string-match regex (car p))
380 (setq poss (cons (car p) poss)))
381 (setq p (cdr p)))))
382
383 ;; Now we have a list of possible completions
384 (cond
385
386 ;; No valid completions found
387 ((null poss)
388 (if (and (eq mode 'word)
389 (not PC-word-failed-flag))
390 (let ((PC-word-failed-flag t))
391 (delete-backward-char 1)
392 (PC-do-completion 'word))
393 (beep)
394 (PC-temp-minibuffer-message (if ambig
395 " (Ambiguous dir name)"
396 (if (eq mode 'help)
397 " (No completions)"
398 " (No match)")))
399 nil))
400
401 ;; More than one valid completion found
402 ((or (cdr (setq helpposs poss))
403 (memq mode '(help word)))
404
405 ;; Handle completion-ignored-extensions
406 (and filename
407 (not (eq mode 'help))
408 (let ((p2 poss))
409
410 ;; Build a regular expression representing the extensions list
411 (or (equal completion-ignored-extensions PC-ignored-extensions)
412 (setq PC-ignored-regexp
413 (concat "\\("
414 (mapconcat
415 'regexp-quote
416 (setq PC-ignored-extensions
417 completion-ignored-extensions)
418 "\\|")
419 "\\)\\'")))
420
421 ;; Check if there are any without an ignored extension
422 (setq p nil)
423 (while p2
424 (or (string-match PC-ignored-regexp (car p2))
425 (setq p (cons (car p2) p)))
426 (setq p2 (cdr p2)))
427
428 ;; If there are "good" names, use them
429 (and p (setq poss p))))
430
431 ;; Is the actual string one of the possible completions?
432 (setq p (and (not (eq mode 'help)) poss))
433 (while (and p
434 (not (equal (car p) basestr)))
435 (setq p (cdr p)))
436 (if p
437
438 (progn
439 (if (null mode)
440 (PC-temp-minibuffer-message " (Complete, but not unique)"))
441 t)
442
443 ;; If ambiguous, try for a partial completion
444 (let ((improved nil)
445 prefix
446 (pt nil)
447 (skip "\\`"))
448
449 ;; Check if next few letters are the same in all cases
450 (if (and (not (eq mode 'help))
451 (setq prefix (try-completion "" (mapcar 'list poss))))
452 (let ((first t) i)
453 (if (eq mode 'word)
454 (setq prefix (PC-chop-word prefix basestr)))
455 (goto-char (+ beg (length dirname)))
456 (while (and (progn
457 (setq i 0)
458 (while (< i (length prefix))
459 (if (and (< (point) end)
460 (eq (aref prefix i)
461 (following-char)))
462 (forward-char 1)
463 (if (and (< (point) end)
464 (or (and (looking-at " ")
465 (memq (aref prefix i)
466 PC-delims-list))
467 (eq (downcase (aref prefix i))
468 (downcase
469 (following-char)))))
470 (progn
471 (delete-char 1)
472 (setq end (1- end)))
473 (and filename (looking-at "\\*")
474 (progn
475 (delete-char 1)
476 (setq end (1- end))))
477 (setq improved t))
478 ;; Use format to discard text properties.
479 (insert (format "%s" (substring prefix i (1+ i))))
480 (setq end (1+ end)))
481 (setq i (1+ i)))
482 (or pt (equal (point) beg)
483 (setq pt (point)))
484 (looking-at PC-delim-regex))
485 (setq skip (concat skip
486 (regexp-quote prefix)
487 PC-ndelims-regex)
488 prefix (try-completion
489 ""
490 (mapcar
491 (function
492 (lambda (x)
493 (list
494 (and (string-match skip x)
495 (substring
496 x
497 (match-end 0))))))
498 poss)))
499 (or (> i 0) (> (length prefix) 0))
500 (or (not (eq mode 'word))
501 (and first (> (length prefix) 0)
502 (setq first nil
503 prefix (substring prefix 0 1))))))
504 (goto-char (if (eq mode 'word) end
505 (or pt beg)))))
506
507 (if (and (eq mode 'word)
508 (not PC-word-failed-flag))
509
510 (if improved
511
512 ;; We changed it... would it be complete without the space?
513 (if (PC-is-complete-p (buffer-substring 1 (1- end))
514 table pred)
515 (delete-region (1- end) end)))
516
517 (if improved
518
519 ;; We changed it... enough to be complete?
520 (and (eq mode 'exit)
521 (PC-is-complete-p (buffer-string) table pred))
522
523 ;; If totally ambiguous, display a list of completions
524 (if (or completion-auto-help
525 (eq mode 'help))
526 (with-output-to-temp-buffer "*Completions*"
527 (display-completion-list (sort helpposs 'string-lessp)))
528 (PC-temp-minibuffer-message " (Next char not unique)"))
529 nil)))))
530
531 ;; Only one possible completion
532 (t
533 (if (equal basestr (car poss))
534 (if (null mode)
535 (PC-temp-minibuffer-message " (Sole completion)"))
536 (delete-region beg end)
537 (insert (format "%s"
538 (if filename
539 (substitute-in-file-name (concat dirname (car poss)))
540 (car poss)))))
541 t)))))
542
543
544 (defun PC-is-complete-p (str table pred)
545 (let ((res (if (listp table)
546 (assoc str table)
547 (if (vectorp table)
548 (or (equal str "nil") ; heh, heh, heh
549 (intern-soft str table))
550 (funcall table str pred 'lambda)))))
551 (and res
552 (or (not pred)
553 (and (not (listp table)) (not (vectorp table)))
554 (funcall pred res))
555 res)))
556
557 (defun PC-chop-word (new old)
558 (let ((i -1)
559 (j -1))
560 (while (and (setq i (string-match PC-delim-regex old (1+ i)))
561 (setq j (string-match PC-delim-regex new (1+ j)))))
562 (if (and j
563 (or (not PC-word-failed-flag)
564 (setq j (string-match PC-delim-regex new (1+ j)))))
565 (substring new 0 (1+ j))
566 new)))
567
568 (defvar PC-not-minibuffer nil)
569
570 (defun PC-temp-minibuffer-message (m)
571 "A Lisp version of `temp_minibuffer_message' from minibuf.c."
572 (if PC-not-minibuffer
573 (progn
574 (message m)
575 (sit-for 2)
576 (message ""))
577 (if (fboundp 'temp-minibuffer-message)
578 (temp-minibuffer-message m)
579 (let ((savemax (point-max)))
580 (save-excursion
581 (goto-char (point-max))
582 (insert m))
583 (let ((inhibit-quit t))
584 (sit-for 2)
585 (delete-region savemax (point-max))
586 (if quit-flag
587 (setq quit-flag nil
588 unread-command-char 7)))))))
589
590
591 (defun PC-lisp-complete-symbol ()
592 "Perform completion on Lisp symbol preceding point.
593 That symbol is compared against the symbols that exist
594 and any additional characters determined by what is there
595 are inserted.
596 If the symbol starts just after an open-parenthesis,
597 only symbols with function definitions are considered.
598 Otherwise, all symbols with function definitions, values
599 or properties are considered."
600 (interactive)
601 (let* ((end (point))
602 (buffer-syntax (syntax-table))
603 (beg (unwind-protect
604 (save-excursion
605 (if lisp-mode-syntax-table
606 (set-syntax-table lisp-mode-syntax-table))
607 (backward-sexp 1)
608 (while (= (char-syntax (following-char)) ?\')
609 (forward-char 1))
610 (point))
611 (set-syntax-table buffer-syntax)))
612 (minibuffer-completion-table obarray)
613 (minibuffer-completion-predicate
614 (if (eq (char-after (1- beg)) ?\()
615 'fboundp
616 (function (lambda (sym)
617 (or (boundp sym) (fboundp sym)
618 (symbol-plist sym))))))
619 (PC-not-minibuffer t))
620 (PC-do-completion nil beg end)))
621
622
623 ;;; Wildcards in `C-x C-f' command. This is independent from the main
624 ;;; completion code, except for `PC-expand-many-files' which is called
625 ;;; when "*"'s are found in the path during filename completion. (The
626 ;;; above completion code always understands "*"'s, except in file paths,
627 ;;; without relying on the following code.)
628
629 (defvar PC-many-files-list nil)
630
631 (defun PC-try-load-many-files ()
632 (if (string-match "\\*" buffer-file-name)
633 (let* ((pat buffer-file-name)
634 (files (PC-expand-many-files pat))
635 (first (car files))
636 (next files))
637 (kill-buffer (current-buffer))
638 (or files
639 (error "No matching files"))
640 (save-window-excursion
641 (while (setq next (cdr next))
642 (let ((buf (find-file-noselect (car next))))
643 (switch-to-buffer buf))))
644 ;; This modifies the "buf" variable inside find-file-noselect.
645 (setq buf (get-file-buffer first))
646 (if buf
647 nil ; should do verify-visited-file-modtime stuff.
648 (setq filename first)
649 (setq buf (create-file-buffer filename))
650 (set-buffer buf)
651 (erase-buffer)
652 (insert-file-contents filename t))
653 (if (cdr files)
654 (setq PC-many-files-list (mapconcat
655 (if (string-match "\\*.*/" pat)
656 'identity
657 'file-name-nondirectory)
658 (cdr files) ", ")
659 find-file-hooks (cons 'PC-after-load-many-files
660 find-file-hooks)))
661 ;; This modifies the "error" variable inside find-file-noselect.
662 (setq error nil)
663 t)
664 nil))
665
666 (defun PC-after-load-many-files ()
667 (setq find-file-hooks (delq 'PC-after-load-many-files find-file-hooks))
668 (message "Also loaded %s." PC-many-files-list))
669
670 (defun PC-expand-many-files (name)
671 (save-excursion
672 (set-buffer (generate-new-buffer " *Glob Output*"))
673 (erase-buffer)
674 (shell-command (concat "echo " name) t)
675 (goto-char (point-min))
676 (if (looking-at ".*No match")
677 nil
678 (insert "(\"")
679 (while (search-forward " " nil t)
680 (delete-backward-char 1)
681 (insert "\" \""))
682 (goto-char (point-max))
683 (delete-backward-char 1)
684 (insert "\")")
685 (goto-char (point-min))
686 (let ((files (read (current-buffer))))
687 (kill-buffer (current-buffer))
688 files))))
689
690 (or PC-disable-wildcards
691 (memq 'PC-try-load-many-files find-file-not-found-hooks)
692 (setq find-file-not-found-hooks (cons 'PC-try-load-many-files
693 find-file-not-found-hooks)))
694
695
696
697 ;;; Facilities for loading C header files. This is independent from the
698 ;;; main completion code. See also the variable `PC-include-file-path'
699 ;;; at top of this file.
700
701 (defun PC-look-for-include-file ()
702 (if (string-match "[\"<]\\([^\"<>]*\\)[\">]?$" (buffer-file-name))
703 (let ((name (substring (buffer-file-name)
704 (match-beginning 1) (match-end 1)))
705 (punc (aref (buffer-file-name) (match-beginning 0)))
706 (path nil)
707 new-buf)
708 (kill-buffer (current-buffer))
709 (if (equal name "")
710 (save-excursion
711 (set-buffer (car (buffer-list)))
712 (save-excursion
713 (beginning-of-line)
714 (if (looking-at
715 "[ \t]*#[ \t]*include[ \t]+[<\"]\\(.+\\)[>\"][ \t]*[\n/]")
716 (setq name (buffer-substring (match-beginning 1)
717 (match-end 1))
718 punc (char-after (1- (match-beginning 1))))
719 ;; Suggested by Frank Siebenlist:
720 (if (or (looking-at
721 "[ \t]*([ \t]*load[ \t]+\"\\([^\"]+\\)\"")
722 (looking-at
723 "[ \t]*([ \t]*load-library[ \t]+\"\\([^\"]+\\)\"")
724 (looking-at
725 "[ \t]*([ \t]*require[ \t]+'\\([^\t )]+\\)[\t )]"))
726 (progn
727 (setq name (buffer-substring (match-beginning 1)
728 (match-end 1))
729 punc ?\<
730 path load-path)
731 (if (string-match "\\.elc$" name)
732 (setq name (substring name 0 -1))
733 (or (string-match "\\.el$" name)
734 (setq name (concat name ".el")))))
735 (error "Not on an #include line"))))))
736 (or (string-match "\\.[a-zA-Z0-9]+$" name)
737 (setq name (concat name ".h")))
738 (if (eq punc ?\<)
739 (let ((path (or path (PC-include-file-path))))
740 (while (and path
741 (not (file-exists-p
742 (concat (file-name-as-directory (car path))
743 name))))
744 (setq path (cdr path)))
745 (if path
746 (setq name (concat (file-name-as-directory (car path)) name))
747 (error "No such include file: <%s>" name)))
748 (let ((dir (save-excursion
749 (set-buffer (car (buffer-list)))
750 default-directory)))
751 (if (file-exists-p (concat dir name))
752 (setq name (concat dir name))
753 (error "No such include file: \"%s\"" name))))
754 (setq new-buf (get-file-buffer name))
755 (if new-buf
756 ;; no need to verify last-modified time for this!
757 (set-buffer new-buf)
758 (setq new-buf (create-file-buffer name))
759 (set-buffer new-buf)
760 (erase-buffer)
761 (insert-file-contents name t))
762 (setq filename name
763 error nil
764 buf new-buf)
765 t)
766 nil))
767
768 (defun PC-include-file-path ()
769 (or PC-include-file-path
770 (let ((env (getenv "INCPATH"))
771 (path nil)
772 pos)
773 (or env (error "No include file path specified"))
774 (while (setq pos (string-match ":[^:]+$" env))
775 (setq path (cons (substring env (1+ pos)) path)
776 env (substring env 0 pos)))
777 path)))
778
779 ;;; This is adapted from lib-complete.el, by Mike Williams.
780 (defun PC-include-file-all-completions (file search-path &optional full)
781 "Return all completions for FILE in any directory on SEARCH-PATH.
782 If optional third argument FULL is non-nil, returned pathnames should be
783 absolute rather than relative to some directory on the SEARCH-PATH."
784 (setq search-path
785 (mapcar '(lambda (dir)
786 (if dir (file-name-as-directory dir) default-directory))
787 search-path))
788 (if (file-name-absolute-p file)
789 ;; It's an absolute file name, so don't need search-path
790 (progn
791 (setq file (expand-file-name file))
792 (file-name-all-completions
793 (file-name-nondirectory file) (file-name-directory file)))
794 (let ((subdir (file-name-directory file))
795 (ndfile (file-name-nondirectory file))
796 file-lists)
797 ;; Append subdirectory part to each element of search-path
798 (if subdir
799 (setq search-path
800 (mapcar '(lambda (dir) (concat dir subdir))
801 search-path)
802 file ))
803 ;; Make list of completions in each directory on search-path
804 (while search-path
805 (let* ((dir (car search-path))
806 (subdir (if full dir subdir)))
807 (if (file-directory-p dir)
808 (progn
809 (setq file-lists
810 (cons
811 (mapcar '(lambda (file) (concat subdir file))
812 (file-name-all-completions ndfile
813 (car search-path)))
814 file-lists))))
815 (setq search-path (cdr search-path))))
816 ;; Compress out duplicates while building complete list (slloooow!)
817 (let ((sorted (sort (apply 'nconc file-lists)
818 '(lambda (x y) (not (string-lessp x y)))))
819 compressed)
820 (while sorted
821 (if (equal (car sorted) (car compressed)) nil
822 (setq compressed (cons (car sorted) compressed)))
823 (setq sorted (cdr sorted)))
824 compressed))))
825
826 (defvar PC-old-read-file-name-internal nil)
827
828 (defun PC-read-include-file-name-internal (string dir action)
829 (if (string-match "<\\([^\"<>]*\\)>?$" string)
830 (let* ((name (substring string (match-beginning 1) (match-end 1)))
831 (str2 (substring string (match-beginning 0)))
832 (completion-table
833 (mapcar (function (lambda (x) (list (format "<%s>" x))))
834 (PC-include-file-all-completions
835 name (PC-include-file-path)))))
836 (cond
837 ((not completion-table) nil)
838 ((eq action nil) (try-completion str2 completion-table nil))
839 ((eq action t) (all-completions str2 completion-table nil))
840 ((eq action 'lambda)
841 (eq (try-completion str2 completion-table nil) t))))
842 (funcall PC-old-read-file-name-internal string dir action)))
843
844 (or PC-disable-includes
845 (memq 'PC-look-for-include-file find-file-not-found-hooks)
846 (setq find-file-not-found-hooks (cons 'PC-look-for-include-file
847 find-file-not-found-hooks)))
848
849 (or PC-disable-includes
850 PC-old-read-file-name-internal
851 (progn
852 (setq PC-old-read-file-name-internal
853 (symbol-function 'read-file-name-internal))
854 (fset 'read-file-name-internal 'PC-read-include-file-name-internal)))
855
856 \f
857 (provide 'complete)
858
859 ;;; End.