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.