Source

emacs / lisp / complete.el

Full commit
   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
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
;;; complete.el --- partial completion mechanism plus other goodies

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

;; Author: Dave Gillespie <daveg@synaptics.com>
;; Keywords: abbrev convenience
;; Version: 2.03
;; 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.

;; This package also contains a wildcard feature for C-x C-f (find-file).
;; For example, `C-x C-f *.c RET' loads all .c files at once, exactly
;; as if you had typed C-x C-f separately for each file.  Completion
;; is supported in connection with wildcards.  Currently only the `*'
;; wildcard character works.

;; File name completion does not do partial completion of directories
;; on the path, e.g., "/u/b/f" will not complete to "/usr/bin/foo",
;; but you can put *'s in the path to accomplish this:  "/u*/b*/f".
;; Stars are required for performance reasons.

;; 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 partial-completion-mode nil
  "Toggle Partial Completion mode.
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.
You must modify via \\[customize] for this variable to have an effect."
  :set (lambda (symbol value)
	 (partial-completion-mode (or value 0)))
  :initialize 'custom-initialize-default
  :type 'boolean
  :group 'partial-completion
  :require 'complete)

(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)
		 (sexp :tag "find-file" :format "%t\n" 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-wildcards nil
  "*If non-nil, wildcard support in \\[find-file] is disabled."
  :type 'boolean
  :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-old-read-file-name-internal nil)

;;;###autoload
(defun partial-completion-mode (&optional arg)
  "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.

For example, M-x p-c-b 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-wildcards' is non-nil, the \"*\" wildcard is interpreted
specially when entering file or directory names.  For example,
\\[find-file] *.c RET finds each C file in the currenty directory, and
\\[find-file] */foo_bar.c TAB completes the directory name as far as possible.

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'."
  (interactive "P")
  (let ((on-p (if arg
		  (> (prefix-numeric-value arg) 0)
		(not partial-completion-mode))))
    ;; Deal with key bindings...
    (PC-bindings on-p)
    ;; Deal with wildcard file feature...
    (cond ((not on-p)
	   (remove-hook 'find-file-not-found-hooks 'PC-try-load-many-files))
	  ((not PC-disable-wildcards)
	   (add-hook 'find-file-not-found-hooks 'PC-try-load-many-files)))
    ;; Deal with include file feature...
    (cond ((not on-p)
	   (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 on-p) (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)))
    ;; Finally set the mode variable.
    (setq partial-completion-mode on-p)))

(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)))))

;; Because the `partial-completion-mode' option is defined before the
;; `partial-completion-mode' command and its callee, we give the former a
;; default `:initialize' keyword value.  Otherwise, the `:set' keyword value
;; would be called to initialise the variable value, and that would call the
;; as-yet undefined `partial-completion-mode' function.
;; Since the default `:initialize' keyword value (obviously) does not turn on
;; Partial Completion Mode, we do that here, once the `partial-completion-mode'
;; function and its callee are defined.
(when partial-completion-mode
  (partial-completion-mode t))

(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 (= (buffer-size) 0)  ; 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 (point-min)))
  (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
	 (str (buffer-substring beg end))
	 (incname (and filename (string-match "<\\([^\"<>]*\\)>?$" str)))
	 (ambig nil)
	 basestr
	 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

      ;; Record how many characters at the beginning are not included
      ;; in completion.
      (setq dirlength
	    (if filename
		(length (file-name-directory str))
	      0))

      ;; Do substitutions in directory names
      (and filename
	   (not (equal str (setq p (substitute-in-file-name str))))
	   (progn
	     (delete-region beg end)
	     (insert p)
	     (setq str p 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)))

      ;; 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)))
	(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))

      ;; 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 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 (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
	       (setq p nil)
	       (while p2
		 (or (string-match PC-ignored-regexp (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 (buffer-string) table pred))

		;; If totally ambiguous, display a list of completions
		(if (or completion-auto-help
			(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 (equal basestr (car poss))
	    (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)))


;;; Wildcards in `C-x C-f' command.  This is independent from the main
;;; completion code, except for `PC-expand-many-files' which is called
;;; when "*"'s are found in the path during filename completion.  (The
;;; above completion code always understands "*"'s, except in file paths,
;;; without relying on the following code.)

(defvar PC-many-files-list nil)

(defun PC-try-load-many-files ()
  (if (string-match "\\*" buffer-file-name)
      (let* ((pat buffer-file-name)
	     (files (PC-expand-many-files pat))
	     (first (car files))
	     (next (reverse (cdr files))))
	(kill-buffer (current-buffer))
	(or files
	    (error "No matching files"))
	;; Bring the other files (not the first) into buffers.
	(save-window-excursion
	  (while next
	    (let ((buf (find-file-noselect (car next))))
	      ;; Put this buffer at the front of the buffer list.
	      (switch-to-buffer buf))
	    (setq next (cdr next))))
	;; This modifies the `buf' variable inside find-file-noselect.
	(setq buf (get-file-buffer first))
	(if buf
	    nil   ; should do verify-visited-file-modtime stuff.
	  (setq filename first)
	  (setq buf (create-file-buffer filename))
	  ;; This modified `truename' inside find-file-noselect.
	  (setq truename (abbreviate-file-name (file-truename filename)))
	  (set-buffer buf)
	  (erase-buffer)
	  (insert-file-contents filename t))
	(if (cdr files)
	    (setq PC-many-files-list (mapconcat
				      (if (string-match "\\*.*/" pat)
					  'identity
					'file-name-nondirectory)
				      (cdr files) ", ")
		  find-file-hooks (cons 'PC-after-load-many-files
					find-file-hooks)))
	;; This modifies the "error" variable inside find-file-noselect.
	(setq error nil)
	t)
    nil))

(defun PC-after-load-many-files ()
  (setq find-file-hooks (delq 'PC-after-load-many-files find-file-hooks))
  (message "Also loaded %s." PC-many-files-list))

(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$" name)
			      (setq name (concat name ".el")))))
		    (error "Not on an #include line"))))))
	(or (string-match "\\.[a-zA-Z0-9]+$" 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))
	(setq filename name
	      error nil
	      buf new-buf)
	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)

;;; End.