Source

emacs / lisp / complete.el

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
;;; complete.el --- partial completion mechanism plus other goodies

;; Copyright (C) 1990, 1991, 1992, 1993, 1999, 2000
;;  Free Software Foundation, Inc.

;; Author: Dave Gillespie <daveg@synaptics.com>
;; Keywords: abbrev convenience
;; Special thanks to Hallvard Furuseth for his many ideas and contributions.

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; Extended completion for the Emacs minibuffer.
;;
;; The basic idea is that the command name or other completable text is
;; divided into words and each word is completed separately, so that
;; "M-x p-b" expands to "M-x print-buffer".  If the entry is ambiguous
;; each word is completed as much as possible and then the cursor is
;; left at the first position where typing another letter will resolve
;; the ambiguity.
;;
;; Word separators for this purpose are hyphen, space, and period.
;; These would most likely occur in command names, Info menu items,
;; and file names, respectively.  But all word separators are treated
;; alike at all times.
;;
;; This completion package replaces the old-style completer's key
;; bindings for TAB, SPC, RET, and `?'.  The old completer is still
;; available on the Meta versions of those keys.  If you set
;; PC-meta-flag to nil, the old completion keys will be left alone
;; and the partial completer will use the Meta versions of the keys.


;; Usage:  M-x partial-completion-mode.  During completable minibuffer entry,
;;
;;     TAB    means to do a partial completion;
;;     SPC    means to do a partial complete-word;
;;     RET    means to do a partial complete-and-exit;
;;     ?      means to do a partial completion-help.
;;
;; If you set PC-meta-flag to nil, then TAB, SPC, RET, and ? perform
;; original Emacs completions, and M-TAB etc. do partial completion.
;; To do this, put the command,
;;
;;       (setq PC-meta-flag nil)
;;
;; in your .emacs file.  To load partial completion automatically, put
;;
;;       (partial-completion-mode t)
;;
;; in your .emacs file, too.  Things will be faster if you byte-compile
;; this file when you install it.
;;
;; As an extra feature, in cases where RET would not normally
;; complete (such as `C-x b'), the M-RET key will always do a partial
;; complete-and-exit.  Thus `C-x b f.c RET' will select or create a
;; buffer called "f.c", but `C-x b f.c M-RET' will select the existing
;; buffer whose name matches that pattern (perhaps "filing.c").
;; (PC-meta-flag does not affect this behavior; M-RET used to be
;; undefined in this situation.)
;;
;; The regular M-TAB (lisp-complete-symbol) command also supports
;; partial completion in this package.

;; In addition, this package includes a feature for accessing include
;; files.  For example, `C-x C-f <sys/time.h> RET' reads the file
;; /usr/include/sys/time.h.  The variable PC-include-file-path is a
;; list of directories in which to search for include files.  Completion
;; is supported in include file names.


;;; Code:

(defgroup partial-completion nil
  "Partial Completion of items."
  :prefix "pc-"
  :group 'minibuffer
  :group 'convenience)

(defcustom PC-first-char 'find-file
  "*Control how the first character of a string is to be interpreted.
If nil, the first character of a string is not taken literally if it is a word
delimiter, so that \".e\" matches \"*.e*\".
If t, the first character of a string is always taken literally even if it is a
word delimiter, so that \".e\" matches \".e*\".
If non-nil and non-t, the first character is taken literally only for file name
completion."
  :type '(choice (const :tag "delimiter" nil)
		 (const :tag "literal" t)
		 (other :tag "find-file" find-file))
  :group 'partial-completion)

(defcustom PC-meta-flag t
  "*If non-nil, TAB means PC completion and M-TAB means normal completion.
Otherwise, TAB means normal completion and M-TAB means Partial Completion."
  :type 'boolean
  :group 'partial-completion)

(defcustom PC-word-delimiters "-_. "
  "*A string of characters treated as word delimiters for completion.
Some arcane rules:
If `]' is in this string, it must come first.
If `^' is in this string, it must not come first.
If `-' is in this string, it must come first or right after `]'.
In other words, if S is this string, then `[S]' must be a legal Emacs regular
expression (not containing character ranges like `a-z')."
  :type 'string
  :group 'partial-completion)

(defcustom PC-include-file-path '("/usr/include" "/usr/local/include")
  "*A list of directories in which to look for include files.
If nil, means use the colon-separated path in the variable $INCPATH instead."
  :type '(repeat directory)
  :group 'partial-completion)

(defcustom PC-disable-includes nil
  "*If non-nil, include-file support in \\[find-file] is disabled."
  :type 'boolean
  :group 'partial-completion)

(defvar PC-default-bindings t
  "If non-nil, default partial completion key bindings are suppressed.")

(defvar PC-env-vars-alist nil
  "A list of the environment variable names and values.")


(defvar PC-old-read-file-name-internal nil)

(defun PC-bindings (bind)
  (let ((completion-map minibuffer-local-completion-map)
	(must-match-map minibuffer-local-must-match-map))
    (cond ((not bind)
	   ;; These bindings are the default bindings.  It would be better to
	   ;; restore the previous bindings.
	   (define-key completion-map "\t"	'minibuffer-complete)
	   (define-key completion-map " "	'minibuffer-complete-word)
	   (define-key completion-map "?"	'minibuffer-completion-help)

	   (define-key must-match-map "\t"	'minibuffer-complete)
	   (define-key must-match-map " "	'minibuffer-complete-word)
	   (define-key must-match-map "\r"	'minibuffer-complete-and-exit)
	   (define-key must-match-map "\n"	'minibuffer-complete-and-exit)
	   (define-key must-match-map "?"	'minibuffer-completion-help)

	   (define-key global-map "\e\t"	'complete-symbol))
	  (PC-default-bindings
	   (define-key completion-map "\t"	'PC-complete)
	   (define-key completion-map " "	'PC-complete-word)
	   (define-key completion-map "?"	'PC-completion-help)

	   (define-key completion-map "\e\t"	'PC-complete)
	   (define-key completion-map "\e "	'PC-complete-word)
	   (define-key completion-map "\e\r"	'PC-force-complete-and-exit)
	   (define-key completion-map "\e\n"	'PC-force-complete-and-exit)
	   (define-key completion-map "\e?"	'PC-completion-help)

	   (define-key must-match-map "\t"	'PC-complete)
	   (define-key must-match-map " "	'PC-complete-word)
	   (define-key must-match-map "\r"	'PC-complete-and-exit)
	   (define-key must-match-map "\n"	'PC-complete-and-exit)
	   (define-key must-match-map "?"	'PC-completion-help)

	   (define-key must-match-map "\e\t"	'PC-complete)
	   (define-key must-match-map "\e "	'PC-complete-word)
	   (define-key must-match-map "\e\r"	'PC-complete-and-exit)
	   (define-key must-match-map "\e\n"	'PC-complete-and-exit)
	   (define-key must-match-map "\e?"	'PC-completion-help)

	   (define-key global-map "\e\t"	'PC-lisp-complete-symbol)))))

;;;###autoload
(define-minor-mode partial-completion-mode
  "Toggle Partial Completion mode.
With prefix ARG, turn Partial Completion mode on if ARG is positive.

When Partial Completion mode is enabled, TAB (or M-TAB if `PC-meta-flag' is
nil) is enhanced so that if some string is divided into words and each word is
delimited by a character in `PC-word-delimiters', partial words are completed
as much as possible and `*' characters are treated likewise in file names.

For example, M-x p-c-m expands to M-x partial-completion-mode since no other
command begins with that sequence of characters, and
\\[find-file] f_b.c TAB might complete to foo_bar.c if that file existed and no
other file in that directory begin with that sequence of characters.

Unless `PC-disable-includes' is non-nil, the `<...>' sequence is interpreted
specially in \\[find-file].  For example,
\\[find-file] <sys/time.h> RET finds the file `/usr/include/sys/time.h'.
See also the variable `PC-include-file-path'."
  :global t :group 'partial-completion
  ;; Deal with key bindings...
  (PC-bindings partial-completion-mode)
  ;; Deal with include file feature...
  (cond ((not partial-completion-mode)
	 (remove-hook 'find-file-not-found-hooks 'PC-look-for-include-file))
	((not PC-disable-includes)
	 (add-hook 'find-file-not-found-hooks 'PC-look-for-include-file)))
  ;; ... with some underhand redefining.
  (cond ((and (not partial-completion-mode)
	      (functionp PC-old-read-file-name-internal))
	 (fset 'read-file-name-internal PC-old-read-file-name-internal))
	((and (not PC-disable-includes) (not PC-old-read-file-name-internal))
	 (setq PC-old-read-file-name-internal
	       (symbol-function 'read-file-name-internal))
	 (fset 'read-file-name-internal
	       'PC-read-include-file-name-internal)))
    (when (and partial-completion-mode (null PC-env-vars-alist))
      (setq PC-env-vars-alist
	    (mapcar (lambda (string)
		      (let ((d (string-match "=" string)))
			(cons (concat "$" (substring string 0 d))
			      (and d (substring string (1+ d))))))
		    process-environment))))


(defun PC-complete ()
  "Like minibuffer-complete, but allows \"b--di\"-style abbreviations.
For example, \"M-x b--di\" would match `byte-recompile-directory', or any
name which consists of three or more words, the first beginning with \"b\"
and the third beginning with \"di\".

The pattern \"b--d\" is ambiguous for `byte-recompile-directory' and
`beginning-of-defun', so this would produce a list of completions
just like when normal Emacs completions are ambiguous.

Word-delimiters for the purposes of Partial Completion are \"-\", \"_\",
\".\", and SPC."
  (interactive)
  (if (PC-was-meta-key)
      (minibuffer-complete)
    ;; If the previous command was not this one,
    ;; never scroll, always retry completion.
    (or (eq last-command this-command)
	(setq minibuffer-scroll-window nil))
    (let ((window minibuffer-scroll-window))
      ;; If there's a fresh completion window with a live buffer,
      ;; and this command is repeated, scroll that window.
      (if (and window (window-buffer window)
	       (buffer-name (window-buffer window)))
	  (save-excursion
	    (set-buffer (window-buffer window))
	    (if (pos-visible-in-window-p (point-max) window)
		(set-window-start window (point-min) nil)
	      (scroll-other-window)))
	(PC-do-completion nil)))))


(defun PC-complete-word ()
  "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
See `PC-complete' for details.
This can be bound to other keys, like `-' and `.', if you wish."
  (interactive)
  (if (eq (PC-was-meta-key) PC-meta-flag)
      (if (eq last-command-char ? )
	  (minibuffer-complete-word)
	(self-insert-command 1))
    (self-insert-command 1)
    (if (eobp)
	(PC-do-completion 'word))))


(defun PC-complete-space ()
  "Like `minibuffer-complete-word', but allows \"b--di\"-style abbreviations.
See `PC-complete' for details.
This is suitable for binding to other keys which should act just like SPC."
  (interactive)
  (if (eq (PC-was-meta-key) PC-meta-flag)
      (minibuffer-complete-word)
    (insert " ")
    (if (eobp)
	(PC-do-completion 'word))))


(defun PC-complete-and-exit ()
  "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
See `PC-complete' for details."
  (interactive)
  (if (eq (PC-was-meta-key) PC-meta-flag)
      (minibuffer-complete-and-exit)
    (PC-do-complete-and-exit)))

(defun PC-force-complete-and-exit ()
  "Like `minibuffer-complete-and-exit', but allows \"b--di\"-style abbreviations.
See `PC-complete' for details."
  (interactive)
  (let ((minibuffer-completion-confirm nil))
    (PC-do-complete-and-exit)))

(defun PC-do-complete-and-exit ()
  (if (= (point-max) (minibuffer-prompt-end))  ; Duplicate the "bug" that Info-menu relies on...
      (exit-minibuffer)
    (let ((flag (PC-do-completion 'exit)))
      (and flag
	   (if (or (eq flag 'complete)
		   (not minibuffer-completion-confirm))
	       (exit-minibuffer)
	     (PC-temp-minibuffer-message " [Confirm]"))))))


(defun PC-completion-help ()
  "Like `minibuffer-completion-help', but allows \"b--di\"-style abbreviations.
See `PC-complete' for details."
  (interactive)
  (if (eq (PC-was-meta-key) PC-meta-flag)
      (minibuffer-completion-help)
    (PC-do-completion 'help)))

(defun PC-was-meta-key ()
  (or (/= (length (this-command-keys)) 1)
      (let ((key (aref (this-command-keys) 0)))
	(if (integerp key)
	    (>= key 128)
	  (not (null (memq 'meta (event-modifiers key))))))))


(defvar PC-ignored-extensions 'empty-cache)
(defvar PC-delims 'empty-cache)
(defvar PC-ignored-regexp nil)
(defvar PC-word-failed-flag nil)
(defvar PC-delim-regex nil)
(defvar PC-ndelims-regex nil)
(defvar PC-delims-list nil)

(defvar PC-completion-as-file-name-predicate
  (function
   (lambda ()
     (memq minibuffer-completion-table
	   '(read-file-name-internal read-directory-name-internal))))
   "A function testing whether a minibuffer completion now will work filename-style.
The function takes no arguments, and typically looks at the value
of `minibuffer-completion-table' and the minibuffer contents.")

(defun PC-do-completion (&optional mode beg end)
  (or beg (setq beg (minibuffer-prompt-end)))
  (or end (setq end (point-max)))
  (let* ((table minibuffer-completion-table)
	 (pred minibuffer-completion-predicate)
	 (filename (funcall PC-completion-as-file-name-predicate))
	 (dirname nil)
	 (dirlength 0)
	 (str (buffer-substring beg end))
	 (incname (and filename (string-match "<\\([^\"<>]*\\)>?$" str)))
	 (ambig nil)
	 basestr
	 env-on
	 regex
	 p offset
	 (poss nil)
	 helpposs
	 (case-fold-search completion-ignore-case))

    ;; Check if buffer contents can already be considered complete
    (if (and (eq mode 'exit)
	     (PC-is-complete-p str table pred))
	'complete

      ;; Do substitutions in directory names
      (and filename
           (setq basestr (or (file-name-directory str) ""))
           (setq dirlength (length basestr))
	   ;; Do substitutions in directory names
           (setq p (substitute-in-file-name basestr))
           (not (string-equal basestr p))
           (setq str (concat p (file-name-nondirectory str)))
           (progn
	     (delete-region beg end)
	     (insert str)
	     (setq end (+ beg (length str)))))

      ;; Prepare various delimiter strings
      (or (equal PC-word-delimiters PC-delims)
	  (setq PC-delims PC-word-delimiters
		PC-delim-regex (concat "[" PC-delims "]")
		PC-ndelims-regex (concat "[^" PC-delims "]*")
		PC-delims-list (append PC-delims nil)))

      ;; Add wildcards if necessary
      (and filename
           (let ((dir (file-name-directory str))
                 (file (file-name-nondirectory str)))
             (while (and (stringp dir) (not (file-directory-p dir)))
               (setq dir (directory-file-name dir))
               (setq file (concat (replace-regexp-in-string
                                   PC-delim-regex "*\\&"
                                   (file-name-nondirectory dir))
                                  "*/" file))
               (setq dir (file-name-directory dir)))
             (setq str (concat dir file))))

      ;; Look for wildcard expansions in directory name
      (and filename
	   (string-match "\\*.*/" str)
	   (let ((pat str)
		 files)
	     (setq p (1+ (string-match "/[^/]*\\'" pat)))
	     (while (setq p (string-match PC-delim-regex pat p))
	       (setq pat (concat (substring pat 0 p)
				 "*"
				 (substring pat p))
		     p (+ p 2)))
	     (setq files (PC-expand-many-files (concat pat "*")))
	     (if files
		 (let ((dir (file-name-directory (car files)))
		       (p files))
		   (while (and (setq p (cdr p))
			       (equal dir (file-name-directory (car p)))))
		   (if p
		       (setq filename nil table nil pred nil
			     ambig t)
		     (delete-region beg end)
		     (setq str (concat dir (file-name-nondirectory str)))
		     (insert str)
		     (setq end (+ beg (length str)))))
	       (setq filename nil table nil pred nil))))

      ;; Strip directory name if appropriate
      (if filename
	  (if incname
	      (setq basestr (substring str incname)
		    dirname (substring str 0 incname))
	    (setq basestr (file-name-nondirectory str)
		  dirname (file-name-directory str))
	    ;; Make sure str is consistent with its directory and basename
	    ;; parts.  This is important on DOZe'NT systems when str only
	    ;; includes a drive letter, like in "d:".
	    (setq str (concat dirname basestr)))
	(setq basestr str))

      ;; Convert search pattern to a standard regular expression
      (setq regex (regexp-quote basestr)
	    offset (if (and (> (length regex) 0)
			    (not (eq (aref basestr 0) ?\*))
			    (or (eq PC-first-char t)
				(and PC-first-char filename))) 1 0)
	    p offset)
      (while (setq p (string-match PC-delim-regex regex p))
	(if (eq (aref regex p) ? )
	    (setq regex (concat (substring regex 0 p)
				PC-ndelims-regex
				PC-delim-regex
				(substring regex (1+ p)))
		  p (+ p (length PC-ndelims-regex) (length PC-delim-regex)))
	  (let ((bump (if (memq (aref regex p)
				'(?$ ?^ ?\. ?* ?+ ?? ?[ ?] ?\\))
			  -1 0)))
	    (setq regex (concat (substring regex 0 (+ p bump))
				PC-ndelims-regex
				(substring regex (+ p bump)))
		  p (+ p (length PC-ndelims-regex) 1)))))
      (setq p 0)
      (if filename
	  (while (setq p (string-match "\\\\\\*" regex p))
	    (setq regex (concat (substring regex 0 p)
				"[^/]*"
				(substring regex (+ p 2))))))
      ;;(setq the-regex regex)
      (setq regex (concat "\\`" regex))

      (and (> (length basestr) 0)
           (= (aref basestr 0) ?$)
           (setq env-on t
                 table PC-env-vars-alist
                 pred nil))

      ;; Find an initial list of possible completions
      (if (not (setq p (string-match (concat PC-delim-regex
					     (if filename "\\|\\*" ""))
				     str
				     (+ (length dirname) offset))))

	  ;; Minibuffer contains no hyphens -- simple case!
	  (setq poss (all-completions (if env-on
					  basestr str)
				      table
				      pred))

	;; Use all-completions to do an initial cull.  This is a big win,
	;; since all-completions is written in C!
	(let ((compl (all-completions (if env-on
					  (file-name-nondirectory (substring str 0 p))
					(substring str 0 p))
                                        table
                                        pred)))
	  (setq p compl)
	  (while p
	    (and (string-match regex (car p))
		 (progn
		   (set-text-properties 0 (length (car p)) '() (car p))
		   (setq poss (cons (car p) poss))))
	    (setq p (cdr p)))))

      ;; Now we have a list of possible completions
      (cond

       ;; No valid completions found
       ((null poss)
	(if (and (eq mode 'word)
		 (not PC-word-failed-flag))
	    (let ((PC-word-failed-flag t))
	      (delete-backward-char 1)
	      (PC-do-completion 'word))
	  (beep)
	  (PC-temp-minibuffer-message (if ambig
					  " [Ambiguous dir name]"
					(if (eq mode 'help)
					    " [No completions]"
					  " [No match]")))
	  nil))

       ;; More than one valid completion found
       ((or (cdr (setq helpposs poss))
	    (memq mode '(help word)))

	;; Handle completion-ignored-extensions
	(and filename
	     (not (eq mode 'help))
	     (let ((p2 poss))

	       ;; Build a regular expression representing the extensions list
	       (or (equal completion-ignored-extensions PC-ignored-extensions)
		   (setq PC-ignored-regexp
			 (concat "\\("
				 (mapconcat
				  'regexp-quote
				  (setq PC-ignored-extensions
					completion-ignored-extensions)
				  "\\|")
				 "\\)\\'")))

	       ;; Check if there are any without an ignored extension.
	       ;; Also ignore `.' and `..'.
	       (setq p nil)
	       (while p2
		 (or (string-match PC-ignored-regexp (car p2))
		     (string-match "\\(\\`\\|/\\)[.][.]?/?\\'" (car p2))
		     (setq p (cons (car p2) p)))
		 (setq p2 (cdr p2)))

	       ;; If there are "good" names, use them
	       (and p (setq poss p))))

	;; Is the actual string one of the possible completions?
	(setq p (and (not (eq mode 'help)) poss))
	(while (and p
		    (not (string-equal (car p) basestr)))
	  (setq p (cdr p)))
	(and p (null mode)
	     (PC-temp-minibuffer-message " [Complete, but not unique]"))
	(if (and p
		 (not (and (null mode)
			   (eq this-command last-command))))
	    t

	  ;; If ambiguous, try for a partial completion
	  (let ((improved nil)
		prefix
		(pt nil)
		(skip "\\`"))

	    ;; Check if next few letters are the same in all cases
	    (if (and (not (eq mode 'help))
		     (setq prefix (try-completion "" (mapcar 'list poss))))
		(let ((first t) i)
		  (if (eq mode 'word)
		      (setq prefix (PC-chop-word prefix basestr)))
		  (goto-char (+ beg (length dirname)))
		  (while (and (progn
				(setq i 0)
				(while (< i (length prefix))
				  (if (and (< (point) end)
					   (eq (aref prefix i)
					       (following-char)))
				      (forward-char 1)
				    (if (and (< (point) end)
					     (or (and (looking-at " ")
						      (memq (aref prefix i)
							    PC-delims-list))
						 (eq (downcase (aref prefix i))
						     (downcase
						      (following-char)))))
					(progn
					  (delete-char 1)
					  (setq end (1- end)))
				      (and filename (looking-at "\\*")
					   (progn
					     (delete-char 1)
					     (setq end (1- end))))
				      (setq improved t))
				    (insert (substring prefix i (1+ i)))
				    (setq end (1+ end)))
				  (setq i (1+ i)))
				(or pt (equal (point) beg)
				    (setq pt (point)))
				(looking-at PC-delim-regex))
			      (setq skip (concat skip
						 (regexp-quote prefix)
						 PC-ndelims-regex)
				    prefix (try-completion
					    ""
					    (mapcar
					     (function
					      (lambda (x)
						(list
						 (and (string-match skip x)
						      (substring
						       x
						       (match-end 0))))))
					     poss)))
			      (or (> i 0) (> (length prefix) 0))
			      (or (not (eq mode 'word))
				  (and first (> (length prefix) 0)
				       (setq first nil
					     prefix (substring prefix 0 1))))))
		  (goto-char (if (eq mode 'word) end
			       (or pt beg)))))

	    (if (and (eq mode 'word)
		     (not PC-word-failed-flag))

		(if improved

		    ;; We changed it... would it be complete without the space?
		    (if (PC-is-complete-p (buffer-substring 1 (1- end))
					  table pred)
			(delete-region (1- end) end)))

	      (if improved

		  ;; We changed it... enough to be complete?
		  (and (eq mode 'exit)
		       (PC-is-complete-p (field-string) table pred))

		;; If totally ambiguous, display a list of completions
		(if (or (eq completion-auto-help t)
			(and completion-auto-help
			     (eq last-command this-command))
			(eq mode 'help))
		    (with-output-to-temp-buffer "*Completions*"
		      (display-completion-list (sort helpposs 'string-lessp))
		      (save-excursion
			(set-buffer standard-output)
			;; Record which part of the buffer we are completing
			;; so that choosing a completion from the list
			;; knows how much old text to replace.
			(setq completion-base-size dirlength)))
		  (PC-temp-minibuffer-message " [Next char not unique]"))
		nil)))))

       ;; Only one possible completion
       (t
	(if (and (equal basestr (car poss))
		 (not (and env-on filename)))
	    (if (null mode)
		(PC-temp-minibuffer-message " [Sole completion]"))
	  (delete-region beg end)
	  (insert (format "%s"
			  (if filename
			      (substitute-in-file-name (concat dirname (car poss)))
			    (car poss)))))
	t)))))


(defun PC-is-complete-p (str table pred)
  (let ((res (if (listp table)
		 (assoc str table)
	       (if (vectorp table)
		   (or (equal str "nil")   ; heh, heh, heh
		       (intern-soft str table))
		 (funcall table str pred 'lambda)))))
    (and res
	 (or (not pred)
	     (and (not (listp table)) (not (vectorp table)))
	     (funcall pred res))
	 res)))

(defun PC-chop-word (new old)
  (let ((i -1)
	(j -1))
    (while (and (setq i (string-match PC-delim-regex old (1+ i)))
		(setq j (string-match PC-delim-regex new (1+ j)))))
    (if (and j
	     (or (not PC-word-failed-flag)
		 (setq j (string-match PC-delim-regex new (1+ j)))))
	(substring new 0 (1+ j))
      new)))

(defvar PC-not-minibuffer nil)

(defun PC-temp-minibuffer-message (message)
  "A Lisp version of `temp_minibuffer_message' from minibuf.c."
  (cond (PC-not-minibuffer
	 (message message)
	 (sit-for 2)
	 (message ""))
	((fboundp 'temp-minibuffer-message)
	 (temp-minibuffer-message message))
	(t
	 (let ((point-max (point-max)))
	   (save-excursion
	     (goto-char point-max)
	     (insert message))
	   (let ((inhibit-quit t))
	     (sit-for 2)
	     (delete-region point-max (point-max))
	     (when quit-flag
	       (setq quit-flag nil
		     unread-command-events '(7))))))))


(defun PC-lisp-complete-symbol ()
  "Perform completion on Lisp symbol preceding point.
That symbol is compared against the symbols that exist
and any additional characters determined by what is there
are inserted.
If the symbol starts just after an open-parenthesis,
only symbols with function definitions are considered.
Otherwise, all symbols with function definitions, values
or properties are considered."
  (interactive)
  (let* ((end (point))
	 (buffer-syntax (syntax-table))
	 (beg (unwind-protect
		  (save-excursion
		    (if lisp-mode-syntax-table
			(set-syntax-table lisp-mode-syntax-table))
		    (backward-sexp 1)
		    (while (= (char-syntax (following-char)) ?\')
		      (forward-char 1))
		    (point))
		(set-syntax-table buffer-syntax)))
	 (minibuffer-completion-table obarray)
	 (minibuffer-completion-predicate
	  (if (eq (char-after (1- beg)) ?\()
	      'fboundp
	    (function (lambda (sym)
			(or (boundp sym) (fboundp sym)
			    (symbol-plist sym))))))
	 (PC-not-minibuffer t))
    (PC-do-completion nil beg end)))

(defun PC-complete-as-file-name ()
   "Perform completion on file names preceding point.
 Environment vars are converted to their values."
   (interactive)
   (let* ((end (point))
          (beg (if (re-search-backward "[^\\][ \t\n\"\`\'][^ \t\n\"\`\']"
				       (point-min) t)
                   (+ (point) 2)
                   (point-min)))
          (minibuffer-completion-table 'read-file-name-internal)
          (minibuffer-completion-predicate "")
          (PC-not-minibuffer t))
     (goto-char end)
     (PC-do-completion nil beg end)))

;;; Use the shell to do globbing.
;;; This could now use file-expand-wildcards instead.

(defun PC-expand-many-files (name)
  (save-excursion
    (set-buffer (generate-new-buffer " *Glob Output*"))
    (erase-buffer)
    (shell-command (concat "echo " name) t)
    (goto-char (point-min))
    (if (looking-at ".*No match")
	nil
      (insert "(\"")
      (while (search-forward " " nil t)
	(delete-backward-char 1)
	(insert "\" \""))
      (goto-char (point-max))
      (delete-backward-char 1)
      (insert "\")")
      (goto-char (point-min))
      (let ((files (read (current-buffer))) (p nil))
	(kill-buffer (current-buffer))
	(or (equal completion-ignored-extensions PC-ignored-extensions)
	    (setq PC-ignored-regexp
		  (concat "\\("
			  (mapconcat
			   'regexp-quote
			   (setq PC-ignored-extensions
				 completion-ignored-extensions)
			   "\\|")
			  "\\)\\'")))
	(setq p nil)
	(while files
	  (or (string-match PC-ignored-regexp (car files))
	      (setq p (cons (car files) p)))
	  (setq files (cdr files)))
	p))))

;;; Facilities for loading C header files.  This is independent from the
;;; main completion code.  See also the variable `PC-include-file-path'
;;; at top of this file.

(defun PC-look-for-include-file ()
  (if (string-match "[\"<]\\([^\"<>]*\\)[\">]?$" (buffer-file-name))
      (let ((name (substring (buffer-file-name)
			     (match-beginning 1) (match-end 1)))
	    (punc (aref (buffer-file-name) (match-beginning 0)))
	    (path nil)
	    new-buf)
	(kill-buffer (current-buffer))
	(if (equal name "")
	    (save-excursion
	      (set-buffer (car (buffer-list)))
	      (save-excursion
		(beginning-of-line)
		(if (looking-at
		     "[ \t]*#[ \t]*include[ \t]+[<\"]\\(.+\\)[>\"][ \t]*[\n/]")
		    (setq name (buffer-substring (match-beginning 1)
						 (match-end 1))
			  punc (char-after (1- (match-beginning 1))))
		  ;; Suggested by Frank Siebenlist:
		  (if (or (looking-at
			   "[ \t]*([ \t]*load[ \t]+\"\\([^\"]+\\)\"")
			  (looking-at
			   "[ \t]*([ \t]*load-library[ \t]+\"\\([^\"]+\\)\"")
			  (looking-at
			   "[ \t]*([ \t]*require[ \t]+'\\([^\t )]+\\)[\t )]"))
		      (progn
			(setq name (buffer-substring (match-beginning 1)
						     (match-end 1))
			      punc ?\<
			      path load-path)
			(if (string-match "\\.elc$" name)
			    (setq name (substring name 0 -1))
			  (or (string-match "\\.el$" name)
			      (setq name (concat name ".el")))))
		    (error "Not on an #include line"))))))
	(or (string-match "\\.[[:alnum:]]+$" name)
	    (setq name (concat name ".h")))
	(if (eq punc ?\<)
	    (let ((path (or path (PC-include-file-path))))
	      (while (and path
			  (not (file-exists-p
				(concat (file-name-as-directory (car path))
					name))))
		(setq path (cdr path)))
	      (if path
		  (setq name (concat (file-name-as-directory (car path)) name))
		(error "No such include file: <%s>" name)))
	  (let ((dir (save-excursion
		       (set-buffer (car (buffer-list)))
		       default-directory)))
	    (if (file-exists-p (concat dir name))
		(setq name (concat dir name))
	      (error "No such include file: `%s'" name))))
	(setq new-buf (get-file-buffer name))
	(if new-buf
	    ;; no need to verify last-modified time for this!
	    (set-buffer new-buf)
	  (setq new-buf (create-file-buffer name))
	  (set-buffer new-buf)
	  (erase-buffer)
	  (insert-file-contents name t))
	;; Returning non-nil with the new buffer current
	;; is sufficient to tell find-file to use it.
	t)
    nil))

(defun PC-include-file-path ()
  (or PC-include-file-path
      (let ((env (getenv "INCPATH"))
	    (path nil)
	    pos)
	(or env (error "No include file path specified"))
	(while (setq pos (string-match ":[^:]+$" env))
	  (setq path (cons (substring env (1+ pos)) path)
		env (substring env 0 pos)))
	path)))

;;; This is adapted from lib-complete.el, by Mike Williams.
(defun PC-include-file-all-completions (file search-path &optional full)
  "Return all completions for FILE in any directory on SEARCH-PATH.
If optional third argument FULL is non-nil, returned pathnames should be
absolute rather than relative to some directory on the SEARCH-PATH."
  (setq search-path
	(mapcar (lambda (dir)
		  (if dir (file-name-as-directory dir) default-directory))
		search-path))
  (if (file-name-absolute-p file)
      ;; It's an absolute file name, so don't need search-path
      (progn
	(setq file (expand-file-name file))
	(file-name-all-completions
	 (file-name-nondirectory file) (file-name-directory file)))
    (let ((subdir (file-name-directory file))
	  (ndfile (file-name-nondirectory file))
	  file-lists)
      ;; Append subdirectory part to each element of search-path
      (if subdir
	  (setq search-path
		(mapcar (lambda (dir) (concat dir subdir))
			search-path)
		file ))
      ;; Make list of completions in each directory on search-path
      (while search-path
	(let* ((dir (car search-path))
	       (subdir (if full dir subdir)))
	  (if (file-directory-p dir)
	      (progn
		(setq file-lists
		      (cons
		       (mapcar (lambda (file) (concat subdir file))
			       (file-name-all-completions ndfile
							  (car search-path)))
		       file-lists))))
	  (setq search-path (cdr search-path))))
      ;; Compress out duplicates while building complete list (slloooow!)
      (let ((sorted (sort (apply 'nconc file-lists)
			  (lambda (x y) (not (string-lessp x y)))))
	    compressed)
	(while sorted
	  (if (equal (car sorted) (car compressed)) nil
	    (setq compressed (cons (car sorted) compressed)))
	  (setq sorted (cdr sorted)))
	compressed))))

(defun PC-read-include-file-name-internal (string dir action)
  (if (string-match "<\\([^\"<>]*\\)>?$" string)
      (let* ((name (substring string (match-beginning 1) (match-end 1)))
	     (str2 (substring string (match-beginning 0)))
	     (completion-table
	      (mapcar (function (lambda (x) (list (format "<%s>" x))))
		      (PC-include-file-all-completions
		       name (PC-include-file-path)))))
	(cond
	 ((not completion-table) nil)
	 ((eq action nil) (try-completion str2 completion-table nil))
	 ((eq action t) (all-completions str2 completion-table nil))
	 ((eq action 'lambda)
	  (eq (try-completion str2 completion-table nil) t))))
    (funcall PC-old-read-file-name-internal string dir action)))


(provide 'complete)

;;; complete.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.