lisp/dired-x.el

   1 ;;; dired-x.el --- extra Dired functionality -*-byte-compile-dynamic: t;-*-
   2
   3 ;; Copyright (C) 1993, 1994, 1997, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   5
   6 ;; Author: Sebastian Kremer <sk@thp.uni-koeln.de>
   7 ;;      Lawrence R. Dodd <dodd@roebling.poly.edu>
   8 ;; Maintainer: Romain Francoise <rfrancoise@gnu.org>
   9 ;; Keywords: dired extensions files
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software; you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation; either version 3, or (at your option)
  16 ;; any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  25 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  26 ;; Boston, MA 02110-1301, USA.
  27
  28 ;;; Commentary:
  29
  30 ;; This is Sebastian Kremer's excellent dired-x.el (Dired Extra), version
  31 ;; 1.191, hacked up for GNU Emacs.  Redundant or conflicting material has
  32 ;; been removed or renamed in order to work properly with dired of GNU
  33 ;; Emacs.  All suggestions or comments are most welcomed.
  34
  35 ;;
  36 ;; Please, PLEASE, *PLEASE* see the info pages.
  37 ;;
  38
  39 ;; BUGS: Type M-x dired-x-submit-report and a report will be generated.
  40
  41 ;; INSTALLATION: In your ~/.emacs,
  42 ;;
  43 ;; (add-hook 'dired-load-hook
  44 ;;           (function (lambda ()
  45 ;;                       (load "dired-x")
  46 ;;                       ;; Set global variables here.  For example:
  47 ;;                       ;; (setq dired-guess-shell-gnutar "gtar")
  48 ;;                       )))
  49 ;; (add-hook 'dired-mode-hook
  50 ;;           (function (lambda ()
  51 ;;                       ;; Set buffer-local variables here.  For example:
  52 ;;                       ;; (dired-omit-mode 1)
  53 ;;                       )))
  54 ;;
  55 ;; At load time dired-x.el will install itself, redefine some functions, and
  56 ;; bind some dired keys.  *Please* see the info pages for more details.
  57
  58 ;; *Please* see the info pages for more details.
  59
  60 ;; User defined variables:
  61 ;;
  62 ;;      dired-bind-vm
  63 ;;      dired-vm-read-only-folders
  64 ;;      dired-bind-jump
  65 ;;      dired-bind-info
  66 ;;      dired-bind-man
  67 ;;      dired-x-hands-off-my-keys
  68 ;;      dired-find-subdir
  69 ;;      dired-enable-local-variables
  70 ;;      dired-local-variables-file
  71 ;;      dired-guess-shell-gnutar
  72 ;;      dired-guess-shell-gzip-quiet
  73 ;;      dired-guess-shell-znew-switches
  74 ;;      dired-guess-shell-alist-user
  75 ;;      dired-clean-up-buffers-too
  76 ;;      dired-omit-mode
  77 ;;      dired-omit-files
  78 ;;      dired-omit-extensions
  79 ;;      dired-omit-size-limit
  80 ;;
  81 ;; To find out more about these variables, load this file, put your cursor at
  82 ;; the end of any of the variable names, and hit C-h v [RET].  *Please* see
  83 ;; the info pages for more details.
  84
  85 ;; When loaded this code redefines the following functions of GNU Emacs
  86 ;;
  87 ;;   Function                         Found in this file of GNU Emacs
  88 ;;   --------                         -------------------------------
  89 ;;   dired-clean-up-after-deletion    ../lisp/dired.el
  90 ;;   dired-find-buffer-nocreate       ../lisp/dired.el
  91 ;;   dired-initial-position           ../lisp/dired.el
  92 ;;
  93 ;;   dired-add-entry                  ../lisp/dired-aux.el
  94 ;;   dired-read-shell-command         ../lisp/dired-aux.el
  95
  96 \f
  97 ;;; Code:
  98
  99 ;; LOAD.
 100
 101 ;; This is a no-op if dired-x is being loaded via `dired-load-hook'.  It is
 102 ;; here in case the user has autoloaded dired-x via the dired-jump key binding
 103 ;; (instead of autoloading to dired as is suggested in the info-pages).
 104
 105 (require 'dired)
 106
 107 ;; We will redefine some functions and also need some macros so we need to
 108 ;; load dired stuff of GNU Emacs.
 109
 110 (require 'dired-aux)
 111
 112 (defvar vm-folder-directory)
 113 (eval-when-compile (require 'man))
 114
 115 ;;; User-defined variables.
 116
 117 (defgroup dired-x nil
 118   "Extended directory editing (dired-x)."
 119   :group 'dired)
 120
 121 (defgroup dired-keys nil
 122   "Dired keys customizations."
 123   :prefix "dired-"
 124   :group 'dired-x)
 125
 126 (defcustom dired-bind-vm nil
 127   "*Non-nil means \"V\" runs `dired-vm', otherwise \"V\" runs `dired-rmail'.
 128 Also, RMAIL files contain -*- rmail -*- at the top so \"f\",
 129 `dired-advertised-find-file', will run rmail."
 130   :type 'boolean
 131   :group 'dired-keys)
 132
 133 (defcustom dired-bind-jump t
 134   "*Non-nil means bind `dired-jump' to C-x C-j, otherwise do not."
 135   :type 'boolean
 136   :group 'dired-keys)
 137
 138 (defcustom dired-bind-man t
 139   "*Non-nil means bind `dired-man' to \"N\" in dired-mode, otherwise do not."
 140   :type 'boolean
 141   :group 'dired-keys)
 142
 143 (defcustom dired-bind-info t
 144   "*Non-nil means bind `dired-info' to \"I\" in dired-mode, otherwise do not."
 145   :type 'boolean
 146   :group 'dired-keys)
 147
 148 (defcustom dired-vm-read-only-folders nil
 149   "*If non-nil, \\[dired-vm] will visit all folders read-only.
 150 If neither nil nor t, e.g. the symbol `if-file-read-only', only
 151 files not writable by you are visited read-only.
 152
 153 Read-only folders only work in VM 5, not in VM 4."
 154   :type '(choice (const :tag "off" nil)
 155                  (const :tag "on" t)
 156                  (other :tag "non-writable only" if-file-read-only))
 157   :group 'dired-x)
 158
 159 (define-minor-mode dired-omit-mode
 160   "Toggle Dired-Omit mode.
 161 With numeric ARG, enable Dired-Omit mode if ARG is positive, disable
 162 otherwise.  Enabling and disabling is buffer-local.
 163 If enabled, \"uninteresting\" files are not listed.
 164 Uninteresting files are those whose filenames match regexp `dired-omit-files',
 165 plus those ending with extensions in `dired-omit-extensions'."
 166   :group 'dired-x
 167   (if dired-omit-mode
 168       ;; This will mention how many lines were omitted:
 169       (let ((dired-omit-size-limit nil)) (dired-omit-expunge))
 170     (revert-buffer)))
 171
 172 ;; For backward compatibility
 173 (define-obsolete-variable-alias 'dired-omit-files-p 'dired-omit-mode "22.1")
 174
 175 (defcustom dired-omit-files "^\\.?#\\|^\\.$\\|^\\.\\.$"
 176   "*Filenames matching this regexp will not be displayed.
 177 This only has effect when `dired-omit-mode' is t.  See interactive function
 178 `dired-omit-mode' \(\\[dired-omit-mode]\) and variable
 179 `dired-omit-extensions'.  The default is to omit  `.', `..', auto-save
 180 files and lock files."
 181   :type 'regexp
 182   :group 'dired-x)
 183
 184 (defcustom dired-find-subdir nil           ; t is pretty near to DWIM...
 185   "*If non-nil, Dired always finds a directory in a buffer of its own.
 186 If nil, Dired finds the directory as a subdirectory in some other buffer
 187 if it is present as one.
 188
 189 If there are several dired buffers for a directory, the most recently
 190 used is chosen.
 191
 192 Dired avoids switching to the current buffer, so that if you have
 193 a normal and a wildcard buffer for the same directory, \\[dired] will
 194 toggle between those two."
 195   :type 'boolean
 196   :group 'dired-x)
 197
 198 (defcustom dired-omit-size-limit 30000
 199   "*Maximum size for the \"omitting\" feature.
 200 If nil, there is no maximum size."
 201   :type '(choice (const :tag "no maximum" nil) integer)
 202   :group 'dired-x)
 203
 204 (defcustom dired-enable-local-variables t
 205   "*Control use of local-variables lists in Dired.
 206 The value can be t, nil or something else.
 207 A value of t means local-variables lists are obeyed;
 208 nil means they are ignored; anything else means query.
 209
 210 This temporarily overrides the value of `enable-local-variables' when listing
 211 a directory.  See also `dired-local-variables-file'."
 212   :type 'boolean
 213   :group 'dired-x)
 214
 215 (defcustom dired-guess-shell-gnutar (when (or (eq system-type 'gnu)
 216                                               (eq system-type 'gnu/linux))
 217                                       "tar")
 218   "*If non-nil, name of GNU tar executable.
 219 \(E.g., \"tar\" or \"gtar\").  The `z' switch will be used with it for
 220 compressed or gzip'ed tar files.  If you don't have GNU tar, set this
 221 to nil: a pipe using `zcat' or `gunzip -c' will be used."
 222   :type '(choice (const :tag "Not GNU tar" nil)
 223                  (string :tag "Command name"))
 224   :group 'dired-x)
 225
 226 (defcustom dired-guess-shell-gzip-quiet t
 227   "*Non-nil says pass -q to gzip overriding verbose GZIP environment."
 228   :type 'boolean
 229   :group 'dired-x)
 230
 231 (defcustom dired-guess-shell-znew-switches nil
 232   "*If non-nil, then string of switches passed to `znew', example: \"-K\"."
 233   :type '(choice (const :tag "None" nil)
 234                  (string :tag "Switches"))
 235   :group 'dired-x)
 236
 237 (defcustom dired-clean-up-buffers-too t
 238   "*Non-nil means offer to kill buffers visiting files and dirs deleted in Dired."
 239   :type 'boolean
 240   :group 'dired-x)
 241
 242 ;;; KEY BINDINGS.
 243
 244 (define-key dired-mode-map "\M-o" 'dired-omit-mode)
 245 (define-key dired-mode-map "*O" 'dired-mark-omitted)
 246 (define-key dired-mode-map "\M-(" 'dired-mark-sexp)
 247 (define-key dired-mode-map "*(" 'dired-mark-sexp)
 248 (define-key dired-mode-map "*." 'dired-mark-extension)
 249 (define-key dired-mode-map "\M-!" 'dired-smart-shell-command)
 250 (define-key dired-mode-map "w" 'dired-copy-filename-as-kill)
 251 (define-key dired-mode-map "\M-G" 'dired-goto-subdir)
 252 (define-key dired-mode-map "F" 'dired-do-find-marked-files)
 253 (define-key dired-mode-map "Y"  'dired-do-relsymlink)
 254 (define-key dired-mode-map "%Y" 'dired-do-relsymlink-regexp)
 255 (define-key dired-mode-map "V" 'dired-do-run-mail)
 256
 257 (if dired-bind-man
 258     (define-key dired-mode-map "N" 'dired-man))
 259
 260 (if dired-bind-info
 261     (define-key dired-mode-map "I" 'dired-info))
 262
 263 ;;; MENU BINDINGS
 264
 265 (let ((menu-bar (lookup-key dired-mode-map [menu-bar])))
 266   (let ((menu (lookup-key menu-bar [operate])))
 267     (define-key-after
 268       menu
 269       [find-files]
 270       '(menu-item
 271         "Find files"
 272         dired-do-find-marked-files
 273         :help "Find current or marked files")
 274       'delete)
 275     (define-key-after
 276       menu
 277       [relsymlink]
 278       '(menu-item
 279         "Relative symlink to..."
 280         dired-do-relsymlink
 281         :visible (fboundp 'make-symbolic-link)
 282         :help "Make relative symbolic links for current or marked files")
 283       'symlink))
 284   (let ((menu (lookup-key menu-bar [mark])))
 285     (define-key-after
 286       menu
 287       [flag-extension]
 288       '(menu-item
 289         "Flag extension..."
 290         dired-flag-extension
 291         :help "Flag files with a certain extension for deletion")
 292       'garbage-files)
 293     (define-key-after
 294       menu
 295       [mark-extension]
 296       '(menu-item
 297         "Mark extension..."
 298         dired-mark-extension
 299         :help "Mark files with a certain extension")
 300       'symlinks)
 301     (define-key-after
 302       menu
 303       [mark-omitted]
 304       '(menu-item
 305         "Mark omitted"
 306         dired-mark-omitted
 307         :help "Mark files matching `dired-omit-files' and `dired-omit-extensions'")
 308       'mark-extension))
 309   (let ((menu (lookup-key menu-bar [regexp])))
 310     (define-key-after
 311       menu
 312       [relsymlink-regexp]
 313       '(menu-item
 314         "Relative symlink..."
 315         dired-do-relsymlink-regexp
 316         :visible (fboundp 'make-symbolic-link)
 317         :help "Make relative symbolic links for files matching regexp")
 318       'symlink))
 319   (let ((menu (lookup-key menu-bar [immediate])))
 320     (define-key-after
 321       menu
 322       [omit-mode]
 323       '(menu-item
 324         "Omit mode" dired-omit-mode
 325         :button (:toggle . dired-omit-mode)
 326         :help "Enable or disable omitting \"uninteresting\" files")
 327       'dashes)))
 328
 329 ;;; GLOBAL BINDING.
 330 (if dired-bind-jump
 331     (progn
 332       (define-key global-map "\C-x\C-j" 'dired-jump)
 333       (define-key global-map "\C-x4\C-j" 'dired-jump-other-window)))
 334
 335 \f
 336 ;;; Install into appropriate hooks.
 337
 338 (add-hook 'dired-mode-hook 'dired-extra-startup)
 339 (add-hook 'dired-after-readin-hook 'dired-omit-expunge)
 340
 341 (defun dired-extra-startup ()
 342   "Automatically put on `dired-mode-hook' to get extra Dired features:
 343 \\<dired-mode-map>
 344   \\[dired-do-run-mail]\t-- run mail on folder (see `dired-bind-vm')
 345   \\[dired-info]\t-- run info on file
 346   \\[dired-man]\t-- run man on file
 347   \\[dired-do-find-marked-files]\t-- visit all marked files simultaneously
 348   \\[dired-omit-mode]\t-- toggle omitting of files
 349   \\[dired-mark-sexp]\t-- mark by Lisp expression
 350   \\[dired-copy-filename-as-kill]\t-- copy the file or subdir names into the kill ring;
 351   \t   you can feed it to other commands using \\[yank]
 352
 353 For more features, see variables
 354
 355   `dired-bind-vm'
 356   `dired-bind-jump'
 357   `dired-bind-info'
 358   `dired-bind-man'
 359   `dired-vm-read-only-folders'
 360   `dired-omit-mode'
 361   `dired-omit-files'
 362   `dired-omit-extensions'
 363   `dired-omit-size-limit'
 364   `dired-find-subdir'
 365   `dired-enable-local-variables'
 366   `dired-local-variables-file'
 367   `dired-guess-shell-gnutar'
 368   `dired-guess-shell-gzip-quiet'
 369   `dired-guess-shell-znew-switches'
 370   `dired-guess-shell-alist-user'
 371   `dired-clean-up-buffers-too'
 372
 373 See also functions
 374
 375   `dired-flag-extension'
 376   `dired-virtual'
 377   `dired-jump'
 378   `dired-man'
 379   `dired-vm'
 380   `dired-rmail'
 381   `dired-info'
 382   `dired-do-find-marked-files'"
 383   (interactive)
 384
 385   ;; These must be done in each new dired buffer.
 386   (dired-hack-local-variables)
 387   (dired-omit-startup))
 388
 389 \f
 390 ;;; BUFFER CLEANING.
 391
 392 ;; REDEFINE.
 393 (defun dired-clean-up-after-deletion (fn)
 394   "Clean up after a deleted file or directory FN.
 395 Remove expanded subdir of deleted dir, if any."
 396   (save-excursion (and (cdr dired-subdir-alist)
 397                        (dired-goto-subdir fn)
 398                        (dired-kill-subdir)))
 399
 400   ;; Offer to kill buffer of deleted file FN.
 401   (if dired-clean-up-buffers-too
 402       (progn
 403         (let ((buf (get-file-buffer fn)))
 404           (and buf
 405                (funcall (function y-or-n-p)
 406                         (format "Kill buffer of %s, too? "
 407                                 (file-name-nondirectory fn)))
 408                (save-excursion ; you never know where kill-buffer leaves you
 409                  (kill-buffer buf))))
 410         (let ((buf-list (dired-buffers-for-dir (expand-file-name fn)))
 411               (buf nil))
 412           (and buf-list
 413                (y-or-n-p (format "Kill dired buffer%s of %s, too? "
 414                                  (dired-plural-s (length buf-list))
 415                                  (file-name-nondirectory fn)))
 416                (while buf-list
 417                  (save-excursion (kill-buffer (car buf-list)))
 418                  (setq buf-list (cdr buf-list)))))))
 419   ;; Anything else?
 420   )
 421
 422 \f
 423 ;;; EXTENSION MARKING FUNCTIONS.
 424
 425 ;;; Mark files with some extension.
 426 (defun dired-mark-extension (extension &optional marker-char)
 427   "Mark all files with a certain EXTENSION for use in later commands.
 428 A `.' is *not* automatically prepended to the string entered."
 429   ;; EXTENSION may also be a list of extensions instead of a single one.
 430   ;; Optional MARKER-CHAR is marker to use.
 431   (interactive "sMarking extension: \nP")
 432   (or (listp extension)
 433       (setq extension (list extension)))
 434   (dired-mark-files-regexp
 435    (concat ".";; don't match names with nothing but an extension
 436            "\\("
 437            (mapconcat 'regexp-quote extension "\\|")
 438            "\\)$")
 439    marker-char))
 440
 441 (defun dired-flag-extension (extension)
 442   "In dired, flag all files with a certain EXTENSION for deletion.
 443 A `.' is *not* automatically prepended to the string entered."
 444   (interactive "sFlagging extension: ")
 445   (dired-mark-extension extension dired-del-marker))
 446
 447 ;;; Define some unpopular file extensions.  Used for cleaning and omitting.
 448
 449 (defvar dired-patch-unclean-extensions
 450   '(".rej" ".orig")
 451   "List of extensions of dispensable files created by the `patch' program.")
 452
 453 (defvar dired-tex-unclean-extensions
 454   '(".toc" ".log" ".aux");; these are already in completion-ignored-extensions
 455   "List of extensions of dispensable files created by TeX.")
 456
 457 (defvar dired-latex-unclean-extensions
 458   '(".idx" ".lof" ".lot" ".glo")
 459   "List of extensions of dispensable files created by LaTeX.")
 460
 461 (defvar dired-bibtex-unclean-extensions
 462   '(".blg" ".bbl")
 463   "List of extensions of dispensable files created by BibTeX.")
 464
 465 (defvar dired-texinfo-unclean-extensions
 466   '(".cp" ".cps" ".fn" ".fns" ".ky" ".kys" ".pg" ".pgs"
 467     ".tp" ".tps" ".vr" ".vrs")
 468   "List of extensions of dispensable files created by texinfo.")
 469
 470 (defun dired-clean-patch ()
 471   "Flag dispensable files created by patch for deletion.
 472 See variable `dired-patch-unclean-extensions'."
 473   (interactive)
 474   (dired-flag-extension dired-patch-unclean-extensions))
 475
 476 (defun dired-clean-tex ()
 477   "Flag dispensable files created by [La]TeX etc. for deletion.
 478 See variables `dired-tex-unclean-extensions',
 479 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 480 `dired-texinfo-unclean-extensions'."
 481   (interactive)
 482   (dired-flag-extension (append dired-texinfo-unclean-extensions
 483                                 dired-latex-unclean-extensions
 484                                 dired-bibtex-unclean-extensions
 485                                 dired-tex-unclean-extensions)))
 486
 487 (defun dired-very-clean-tex ()
 488   "Flag dispensable files created by [La]TeX *and* \".dvi\" for deletion.
 489 See variables `dired-texinfo-unclean-extensions',
 490 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 491 `dired-texinfo-unclean-extensions'."
 492   (interactive)
 493   (dired-flag-extension (append dired-texinfo-unclean-extensions
 494                                 dired-latex-unclean-extensions
 495                                 dired-bibtex-unclean-extensions
 496                                 dired-tex-unclean-extensions
 497                                 (list ".dvi"))))
 498 \f
 499 ;;; JUMP.
 500
 501 ;;;###autoload
 502 (defun dired-jump (&optional other-window)
 503   "Jump to dired buffer corresponding to current buffer.
 504 If in a file, dired the current directory and move to file's line.
 505 If in Dired already, pop up a level and goto old directory's line.
 506 In case the proper dired file line cannot be found, refresh the dired
 507 buffer and try again."
 508   (interactive "P")
 509   (let* ((file buffer-file-name)
 510          (dir (if file (file-name-directory file) default-directory)))
 511     (if (eq major-mode 'dired-mode)
 512         (progn
 513           (setq dir (dired-current-directory))
 514           (dired-up-directory other-window)
 515           (or (dired-goto-file dir)
 516               ;; refresh and try again
 517               (progn
 518                 (dired-insert-subdir (file-name-directory dir))
 519                 (dired-goto-file dir))))
 520       (if other-window
 521           (dired-other-window dir)
 522         (dired dir))
 523       (if file
 524           (or (dired-goto-file file)
 525               ;; refresh and try again
 526               (progn
 527                 (dired-insert-subdir (file-name-directory file))
 528                 (dired-goto-file file))
 529               ;; Toggle omitting, if it is on, and try again.
 530               (if dired-omit-mode
 531                   (progn
 532                     (dired-omit-mode)
 533                     (dired-goto-file file))))))))
 534
 535 (defun dired-jump-other-window ()
 536   "Like \\[dired-jump] (`dired-jump') but in other window."
 537   (interactive)
 538   (dired-jump t))
 539 \f
 540 ;;; OMITTING.
 541
 542 ;;; Enhanced omitting of lines from directory listings.
 543 ;;; Marked files are never omitted.
 544
 545 ;; should probably get rid of this and always use 'no-dir.
 546 ;; sk 28-Aug-1991 09:37
 547 (defvar dired-omit-localp 'no-dir
 548   "The LOCALP argument `dired-omit-expunge' passes to `dired-get-filename'.
 549 If it is `no-dir', omitting is much faster, but you can only match
 550 against the non-directory part of the file name.  Set it to nil if you
 551 need to match the entire file name.")
 552
 553 ;; \017=^O for Omit - other packages can chose other control characters.
 554 (defvar dired-omit-marker-char ?\017
 555   "Temporary marker used by dired-omit.
 556 Should never be used as marker by the user or other packages.")
 557
 558 (defun dired-omit-startup ()
 559   (or (assq 'dired-omit-mode minor-mode-alist)
 560       (setq minor-mode-alist
 561             (append '((dired-omit-mode
 562                        (:eval (if (eq major-mode 'dired-mode)
 563                                   " Omit" ""))))
 564                     minor-mode-alist))))
 565
 566 (defun dired-mark-omitted ()
 567   "Mark files matching `dired-omit-files' and `dired-omit-extensions'."
 568   (interactive)
 569   (let ((dired-omit-mode nil)) (revert-buffer)) ;; Show omitted files
 570   (dired-mark-unmarked-files (dired-omit-regexp) nil nil dired-omit-localp))
 571
 572 (defvar dired-omit-extensions
 573   (append completion-ignored-extensions
 574           dired-latex-unclean-extensions
 575           dired-bibtex-unclean-extensions
 576           dired-texinfo-unclean-extensions)
 577   "If non-nil, a list of extensions \(strings\) to omit from Dired listings.
 578 Defaults to elements of `completion-ignored-extensions',
 579 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions', and
 580 `dired-texinfo-unclean-extensions'.
 581
 582 See interactive function `dired-omit-mode' \(\\[dired-omit-mode]\) and
 583 variables `dired-omit-mode' and `dired-omit-files'.")
 584
 585 (defun dired-omit-expunge (&optional regexp)
 586   "Erases all unmarked files matching REGEXP.
 587 Does nothing if global variable `dired-omit-mode' is nil, or if called
 588   non-interactively and buffer is bigger than `dired-omit-size-limit'.
 589 If REGEXP is nil or not specified, uses `dired-omit-files', and also omits
 590   filenames ending in `dired-omit-extensions'.
 591 If REGEXP is the empty string, this function is a no-op.
 592
 593 This functions works by temporarily binding `dired-marker-char' to
 594 `dired-omit-marker-char' and calling `dired-do-kill-lines'."
 595   (interactive "sOmit files (regexp): ")
 596   (if (and dired-omit-mode
 597            (or (interactive-p)
 598                (not dired-omit-size-limit)
 599                (< (buffer-size) dired-omit-size-limit)
 600                (progn
 601                  (message "Not omitting: directory larger than %d characters."
 602                           dired-omit-size-limit)
 603                  (setq dired-omit-mode nil)
 604                  nil)))
 605       (let ((omit-re (or regexp (dired-omit-regexp)))
 606             (old-modified-p (buffer-modified-p))
 607             count)
 608         (or (string= omit-re "")
 609             (let ((dired-marker-char dired-omit-marker-char))
 610               (message "Omitting...")
 611               (if (dired-mark-unmarked-files omit-re nil nil dired-omit-localp)
 612                   (progn
 613                     (setq count (dired-do-kill-lines nil "Omitted %d line%s."))
 614                     (force-mode-line-update))
 615                 (message "(Nothing to omit)"))))
 616         ;; Try to preserve modified state of buffer.  So `%*' doesn't appear
 617         ;; in mode-line of omitted buffers.
 618         (set-buffer-modified-p (and old-modified-p
 619                                     (save-excursion
 620                                       (goto-char (point-min))
 621                                       (re-search-forward dired-re-mark nil t))))
 622         count)))
 623
 624 (defun dired-omit-regexp ()
 625   (concat (if dired-omit-files (concat "\\(" dired-omit-files "\\)") "")
 626           (if (and dired-omit-files dired-omit-extensions) "\\|" "")
 627           (if dired-omit-extensions
 628               (concat ".";; a non-extension part should exist
 629                       "\\("
 630                       (mapconcat 'regexp-quote dired-omit-extensions "\\|")
 631                       "\\)$")
 632             "")))
 633
 634 ;; Returns t if any work was done, nil otherwise.
 635 (defun dired-mark-unmarked-files (regexp msg &optional unflag-p localp)
 636   "Mark unmarked files matching REGEXP, displaying MSG.
 637 REGEXP is matched against the entire file name.
 638 Does not re-mark files which already have a mark.
 639 With prefix argument, unflag all those files.
 640 Optional fourth argument LOCALP is as in `dired-get-filename'."
 641   (interactive "P")
 642   (let ((dired-marker-char (if unflag-p ?\s dired-marker-char)))
 643     (dired-mark-if
 644      (and
 645       ;; not already marked
 646       (looking-at " ")
 647       ;; uninteresting
 648       (let ((fn (dired-get-filename localp t)))
 649         (and fn (string-match regexp fn))))
 650      msg)))
 651
 652 ;; Compiler does not get fset.
 653 (declare-function dired-omit-old-add-entry "dired-x")
 654
 655 ;;; REDEFINE.
 656 ;;; Redefine dired-aux.el's version of `dired-add-entry'
 657 ;;; Save old defun if not already done:
 658 (or (fboundp 'dired-omit-old-add-entry)
 659     (fset 'dired-omit-old-add-entry (symbol-function 'dired-add-entry)))
 660
 661 ;;; REDEFINE.
 662 (defun dired-omit-new-add-entry (filename &optional marker-char relative)
 663   ;; This redefines dired-aux.el's dired-add-entry to avoid calling ls for
 664   ;; files that are going to be omitted anyway.
 665   (if dired-omit-mode
 666       ;; perhaps return t without calling ls
 667       (let ((omit-re (dired-omit-regexp)))
 668         (if (or (string= omit-re "")
 669                 (not
 670                  (string-match omit-re
 671                                (cond
 672                                 ((eq 'no-dir dired-omit-localp)
 673                                  filename)
 674                                 ((eq t dired-omit-localp)
 675                                  (dired-make-relative filename))
 676                                 (t
 677                                  (dired-make-absolute
 678                                   filename
 679                                   (file-name-directory filename)))))))
 680             ;; if it didn't match, go ahead and add the entry
 681             (dired-omit-old-add-entry filename marker-char relative)
 682           ;; dired-add-entry returns t for success, perhaps we should
 683           ;; return file-exists-p
 684           t))
 685     ;; omitting is not turned on at all
 686     (dired-omit-old-add-entry filename marker-char relative)))
 687
 688 ;; Redefine it.
 689 (fset 'dired-add-entry 'dired-omit-new-add-entry)
 690
 691 \f
 692 ;;; VIRTUAL DIRED MODE.
 693
 694 ;;; For browsing `ls -lR' listings in a dired-like fashion.
 695
 696 (defalias 'virtual-dired 'dired-virtual)
 697 (defun dired-virtual (dirname &optional switches)
 698   "Put this buffer into Virtual Dired mode.
 699
 700 In Virtual Dired mode, all commands that do not actually consult the
 701 filesystem will work.
 702
 703 This is useful if you want to peruse and move around in an ls -lR
 704 output file, for example one you got from an ftp server.  With
 705 ange-ftp, you can even dired a directory containing an ls-lR file,
 706 visit that file and turn on virtual dired mode.  But don't try to save
 707 this file, as dired-virtual indents the listing and thus changes the
 708 buffer.
 709
 710 If you have save a Dired buffer in a file you can use \\[dired-virtual] to
 711 resume it in a later session.
 712
 713 Type \\<dired-mode-map>\\[revert-buffer] \
 714 in the Virtual Dired buffer and answer `y' to convert
 715 the virtual to a real dired buffer again.  You don't have to do this, though:
 716 you can relist single subdirs using \\[dired-do-redisplay]."
 717
 718   ;; DIRNAME is the top level directory of the buffer.  It will become
 719   ;; its `default-directory'.  If nil, the old value of
 720   ;; default-directory is used.
 721
 722   ;; Optional SWITCHES are the ls switches to use.
 723
 724   ;; Shell wildcards will be used if there already is a `wildcard'
 725   ;; line in the buffer (thus it is a saved Dired buffer), but there
 726   ;; is no other way to get wildcards.  Insert a `wildcard' line by
 727   ;; hand if you want them.
 728
 729   (interactive
 730    (list (read-string "Virtual Dired directory: " (dired-virtual-guess-dir))))
 731   (goto-char (point-min))
 732   (or (looking-at "  ")
 733       ;; if not already indented, do it now:
 734       (indent-region (point-min) (point-max) 2))
 735   (or dirname (setq dirname default-directory))
 736   (setq dirname (expand-file-name (file-name-as-directory dirname)))
 737   (setq default-directory dirname)      ; contains no wildcards
 738   (let ((wildcard (save-excursion
 739                     (goto-char (point-min))
 740                     (forward-line 1)
 741                     (and (looking-at "^  wildcard ")
 742                          (buffer-substring (match-end 0)
 743                                            (progn (end-of-line) (point)))))))
 744   (if wildcard
 745         (setq dirname (expand-file-name wildcard default-directory))))
 746   ;; If raw ls listing (not a saved old dired buffer), give it a
 747   ;; decent subdir headerline:
 748   (goto-char (point-min))
 749   (or (looking-at dired-subdir-regexp)
 750       (insert "  "
 751               (directory-file-name (file-name-directory default-directory))
 752               ":\n"))
 753   (dired-mode dirname (or switches dired-listing-switches))
 754   (setq mode-name "Virtual Dired"
 755         revert-buffer-function 'dired-virtual-revert)
 756   (set (make-local-variable 'dired-subdir-alist) nil)
 757   (dired-build-subdir-alist)
 758   (goto-char (point-min))
 759   (dired-initial-position dirname))
 760
 761 (defun dired-virtual-guess-dir ()
 762   "Guess and return appropriate working directory of this buffer.
 763 The buffer is assumed to be in Dired or ls -lR format.  The guess is
 764 based upon buffer contents.  If nothing could be guessed, returns
 765 nil."
 766
 767   (let ((regexp "^\\(  \\)?\\([^ \n\r]*\\)\\(:\\)[\n\r]")
 768         (subexpr 2))
 769     (goto-char (point-min))
 770     (cond ((looking-at regexp)
 771            ;; If a saved dired buffer, look to which dir and
 772            ;; perhaps wildcard it belongs:
 773            (let ((dir (buffer-substring (match-beginning subexpr)
 774                                         (match-end subexpr))))
 775              (file-name-as-directory dir)))
 776           ;; Else no match for headerline found.  It's a raw ls listing.
 777           ;; In raw ls listings the directory does not have a headerline
 778           ;; try parent of first subdir, if any
 779           ((re-search-forward regexp nil t)
 780            (file-name-directory
 781             (directory-file-name
 782              (file-name-as-directory
 783               (buffer-substring (match-beginning subexpr)
 784                                 (match-end subexpr))))))
 785           (t                            ; if all else fails
 786            nil))))
 787
 788
 789 (defun dired-virtual-revert (&optional arg noconfirm)
 790   (if (not
 791        (y-or-n-p "Cannot revert a Virtual Dired buffer - switch to Real Dired mode? "))
 792       (error "Cannot revert a Virtual Dired buffer")
 793     (setq mode-name "Dired"
 794           revert-buffer-function 'dired-revert)
 795     (revert-buffer)))
 796
 797 ;; A zero-arg version of dired-virtual.
 798 (defun dired-virtual-mode ()
 799   "Put current buffer into Virtual Dired mode (see `dired-virtual').
 800 Useful on `magic-mode-alist' with the regexp
 801
 802   \"^  \\\\(/[^ /]+\\\\)+/?:$\"
 803
 804 to put saved dired buffers automatically into Virtual Dired mode.
 805
 806 Also useful for `auto-mode-alist' like this:
 807
 808   (add-to-list 'auto-mode-alist
 809                '(\"[^/]\\\\.dired\\\\'\" . dired-virtual-mode))"
 810   (interactive)
 811   (dired-virtual (dired-virtual-guess-dir)))
 812
 813 \f
 814 ;;; SMART SHELL.
 815
 816 ;;; An Emacs buffer can have but one working directory, stored in the
 817 ;;; buffer-local variable `default-directory'.  A Dired buffer may have
 818 ;;; several subdirectories inserted, but still has but one working directory:
 819 ;;; that of the top level Dired directory in that buffer.  For some commands
 820 ;;; it is appropriate that they use the current Dired directory instead of
 821 ;;; `default-directory', e.g., `find-file' and `compile'.  This is a general
 822 ;;; mechanism is provided for special handling of the working directory in
 823 ;;; special major modes.
 824
 825 ;; It's easier to add to this alist than redefine function
 826 ;; default-directory while keeping the old information.
 827 (defconst default-directory-alist
 828   '((dired-mode . (if (fboundp 'dired-current-directory)
 829                       (dired-current-directory)
 830                     default-directory)))
 831   "Alist of major modes and their opinion on `default-directory'.
 832 This is given as a Lisp expression to evaluate.  A resulting value of
 833 nil is ignored in favor of `default-directory'.")
 834
 835 (defun dired-default-directory ()
 836   "Usage like variable `default-directory'.
 837 Knows about the special cases in variable `default-directory-alist'."
 838   (or (eval (cdr (assq major-mode default-directory-alist)))
 839       default-directory))
 840
 841 (defun dired-smart-shell-command (command &optional output-buffer error-buffer)
 842   "Like function `shell-command', but in the current Virtual Dired directory."
 843   (interactive
 844    (list
 845     (minibuffer-with-setup-hook
 846         (lambda ()
 847           (set (make-local-variable 'minibuffer-default-add-function)
 848                'minibuffer-default-add-shell-commands))
 849       (read-shell-command "Shell command: " nil nil
 850                           (cond
 851                            (buffer-file-name (file-relative-name buffer-file-name))
 852                            ((eq major-mode 'dired-mode) (dired-get-filename t t)))))
 853     current-prefix-arg
 854     shell-command-default-error-buffer))
 855   (let ((default-directory (dired-default-directory)))
 856     (shell-command command output-buffer error-buffer)))
 857
 858 \f
 859 ;;; LOCAL VARIABLES FOR DIRED BUFFERS.
 860
 861 ;;; Brief Description:
 862 ;;;
 863 ;;; * `dired-extra-startup' is part of the `dired-mode-hook'.
 864 ;;;
 865 ;;; * `dired-extra-startup' calls `dired-hack-local-variables'
 866 ;;;
 867 ;;; * `dired-hack-local-variables' checks the value of
 868 ;;;   `dired-local-variables-file'
 869 ;;;
 870 ;;; * Check if `dired-local-variables-file' is a non-nil string and is a
 871 ;;;   filename found in the directory of the Dired Buffer being created.
 872 ;;;
 873 ;;; * If `dired-local-variables-file' satisfies the above, then temporarily
 874 ;;;   include it in the Dired Buffer at the bottom.
 875 ;;;
 876 ;;; * Set `enable-local-variables' temporarily to the user variable
 877 ;;;   `dired-enable-local-variables' and run `hack-local-variables' on the
 878 ;;;   Dired Buffer.
 879
 880 (defvar dired-local-variables-file (convert-standard-filename ".dired")
 881   "Filename, as string, containing local dired buffer variables to be hacked.
 882 If this file found in current directory, then it will be inserted into dired
 883 buffer and `hack-local-variables' will be run.  See Info node
 884 `(emacs)File Variables' for more information on local variables.
 885 See also `dired-enable-local-variables'.")
 886
 887 (defun dired-hack-local-variables ()
 888   "Evaluate local variables in `dired-local-variables-file' for dired buffer."
 889   (if (and dired-local-variables-file
 890            (stringp dired-local-variables-file)
 891            (file-exists-p dired-local-variables-file))
 892       (let ((opoint (point-max))
 893             buffer-read-only
 894             ;; In case user has `enable-local-variables' set to nil we
 895             ;; override it locally with dired's variable.
 896             (enable-local-variables dired-enable-local-variables))
 897         ;; Insert 'em.
 898         (save-excursion
 899           (goto-char opoint)
 900           (insert "\^L\n")
 901           (insert-file-contents dired-local-variables-file))
 902         ;; Hack 'em.
 903         (let ((buffer-file-name dired-local-variables-file))
 904           (hack-local-variables))
 905         ;; Make sure that the modeline shows the proper information.
 906         (dired-sort-set-modeline)
 907         ;; Delete this stuff: `eobp' is used to find last subdir by dired.el.
 908         (delete-region opoint (point-max)))))
 909
 910 (defun dired-omit-here-always ()
 911   "Create `dired-local-variables-file' for omitting and reverts directory.
 912 Sets `dired-omit-mode' to t in a local variables file that is readable by
 913 dired."
 914   (interactive)
 915   (if (file-exists-p dired-local-variables-file)
 916       (message "File `./%s' already exists." dired-local-variables-file)
 917
 918     ;; Create `dired-local-variables-file'.
 919     (save-excursion
 920       (set-buffer (get-buffer-create " *dot-dired*"))
 921       (erase-buffer)
 922       (insert "Local Variables:\ndired-omit-mode: t\nEnd:\n")
 923       (write-file dired-local-variables-file)
 924       (kill-buffer (current-buffer)))
 925
 926     ;; Run extra-hooks and revert directory.
 927     (dired-extra-startup)
 928     (dired-revert)))
 929
 930 \f
 931 ;;; GUESS SHELL COMMAND.
 932
 933 ;;; Brief Description:
 934 ;;;
 935 ;;; `dired-do-shell-command' is bound to `!' by dired.el.
 936 ;;;
 937 ;;; * Redefine `dired-do-shell-command' so it calls
 938 ;;;   `dired-guess-shell-command'.
 939 ;;;
 940 ;;; * `dired-guess-shell-command' calls `dired-guess-default' with list of
 941 ;;;    marked files.
 942 ;;;
 943 ;;; * Parse `dired-guess-shell-alist-user' and
 944 ;;;   `dired-guess-shell-alist-default' (in that order) for the first REGEXP
 945 ;;;   that matches the first file in the file list.
 946 ;;;
 947 ;;; * If the REGEXP matches all the entries of the file list then evaluate
 948 ;;;   COMMAND, which is either a string or a Lisp expression returning a
 949 ;;;   string.  COMMAND may be a list of commands.
 950 ;;;
 951 ;;; * Return this command to `dired-guess-shell-command' which prompts user
 952 ;;;   with it.  The list of commands is put into the list of default values.
 953 ;;;   If a command is used successfully then it is stored permanently in
 954 ;;;   `dired-shell-command-history'.
 955
 956 ;;; Guess what shell command to apply to a file.
 957 (defvar dired-shell-command-history nil
 958   "History list for commands that read dired-shell commands.")
 959
 960 ;;; Default list of shell commands.
 961
 962 ;;; NOTE: Use `gunzip -c' instead of `zcat' on `.gz' files.  Some do not
 963 ;;; install GNU zip's version of zcat.
 964
 965 (defvar dired-guess-shell-alist-default
 966   (list
 967    (list "\\.tar$"
 968          '(if dired-guess-shell-gnutar
 969               (concat dired-guess-shell-gnutar " xvf")
 970             "tar xvf")
 971          ;; Extract files into a separate subdirectory
 972          '(if dired-guess-shell-gnutar
 973               (concat "mkdir " (file-name-sans-extension file)
 974                       "; " dired-guess-shell-gnutar " -C "
 975                       (file-name-sans-extension file) " -xvf")
 976             (concat "mkdir " (file-name-sans-extension file)
 977                     "; tar -C " (file-name-sans-extension file) " -xvf"))
 978          ;; List archive contents.
 979          '(if dired-guess-shell-gnutar
 980               (concat dired-guess-shell-gnutar " tvf")
 981             "tar tvf"))
 982
 983    ;; REGEXPS for compressed archives must come before the .Z rule to
 984    ;; be recognized:
 985    (list "\\.tar\\.Z$"
 986          ;; Untar it.
 987          '(if dired-guess-shell-gnutar
 988               (concat dired-guess-shell-gnutar " zxvf")
 989             (concat "zcat * | tar xvf -"))
 990          ;; Optional conversion to gzip format.
 991          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 992                   " " dired-guess-shell-znew-switches))
 993
 994    ;; gzip'ed archives
 995    (list "\\.t\\(ar\\.\\)?gz$"
 996          '(if dired-guess-shell-gnutar
 997               (concat dired-guess-shell-gnutar " zxvf")
 998             (concat "gunzip -qc * | tar xvf -"))
 999          ;; Extract files into a separate subdirectory
1000          '(if dired-guess-shell-gnutar
1001               (concat "mkdir " (file-name-sans-extension file)
1002                       "; " dired-guess-shell-gnutar " -C "
1003                       (file-name-sans-extension file) " -zxvf")
1004             (concat "mkdir " (file-name-sans-extension file)
1005                     "; gunzip -qc * | tar -C "
1006                     (file-name-sans-extension file) " -xvf -"))
1007          ;; Optional decompression.
1008          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q" ""))
1009          ;; List archive contents.
1010          '(if dired-guess-shell-gnutar
1011               (concat dired-guess-shell-gnutar " ztvf")
1012             (concat "gunzip -qc * | tar tvf -")))
1013
1014    ;; bzip2'ed archives
1015    (list "\\.t\\(ar\\.bz2\\|bz\\)$"
1016          "bunzip2 -c * | tar xvf -"
1017          ;; Extract files into a separate subdirectory
1018          '(concat "mkdir " (file-name-sans-extension file)
1019                   "; bunzip2 -c * | tar -C "
1020                   (file-name-sans-extension file) " -xvf -")
1021          ;; Optional decompression.
1022          "bunzip2")
1023
1024    '("\\.shar\\.Z$" "zcat * | unshar")
1025    '("\\.shar\\.g?z$" "gunzip -qc * | unshar")
1026
1027    '("\\.e?ps$" "ghostview" "xloadimage" "lpr")
1028    (list "\\.e?ps\\.g?z$" "gunzip -qc * | ghostview -"
1029          ;; Optional decompression.
1030          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1031    (list "\\.e?ps\\.Z$" "zcat * | ghostview -"
1032          ;; Optional conversion to gzip format.
1033          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1034                   " " dired-guess-shell-znew-switches))
1035
1036    '("\\.patch$" "cat * | patch")
1037    (list "\\.patch\\.g?z$" "gunzip -qc * | patch"
1038          ;; Optional decompression.
1039          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1040    (list "\\.patch\\.Z$" "zcat * | patch"
1041          ;; Optional conversion to gzip format.
1042          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1043                   " " dired-guess-shell-znew-switches))
1044
1045    ;; The following four extensions are useful with dired-man ("N" key)
1046    (list "\\.\\(?:[0-9]\\|man\\)$" '(progn (require 'man)
1047                                            (if (Man-support-local-filenames)
1048                                                "man -l"
1049                                              "cat * | tbl | nroff -man -h")))
1050    (list "\\.\\(?:[0-9]\\|man\\)\\.g?z$" '(progn (require 'man)
1051                                                  (if (Man-support-local-filenames)
1052                                                      "man -l"
1053                                                    "gunzip -qc * | tbl | nroff -man -h"))
1054          ;; Optional decompression.
1055          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1056    (list "\\.[0-9]\\.Z$" '(progn (require 'man)
1057                                  (if (Man-support-local-filenames)
1058                                      "man -l"
1059                                    "zcat * | tbl | nroff -man -h"))
1060          ;; Optional conversion to gzip format.
1061          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1062                   " " dired-guess-shell-znew-switches))
1063    '("\\.pod$" "perldoc" "pod2man * | nroff -man")
1064
1065    '("\\.dvi$" "xdvi" "dvips")          ; preview and printing
1066    '("\\.au$" "play")                   ; play Sun audiofiles
1067    '("\\.mpe?g$\\|\\.avi$" "xine -p")
1068    '("\\.wav$" "play")
1069    '("\\.uu$" "uudecode")               ; for uudecoded files
1070    '("\\.hqx$" "mcvert")
1071    '("\\.sh$" "sh")                     ; execute shell scripts
1072    '("\\.xbm$" "bitmap")                ; view X11 bitmaps
1073    '("\\.gp$" "gnuplot")
1074    '("\\.p[bgpn]m$" "xloadimage")
1075    '("\\.gif$" "xloadimage")            ; view gif pictures
1076    '("\\.tif$" "xloadimage")
1077    '("\\.png$" "display")               ; xloadimage 4.1 doesn't grok PNG
1078    '("\\.jpe?g$" "xloadimage")
1079    '("\\.fig$" "xfig")                  ; edit fig pictures
1080    '("\\.out$" "xgraph")                ; for plotting purposes.
1081    '("\\.tex$" "latex" "tex")
1082    '("\\.texi\\(nfo\\)?$" "makeinfo" "texi2dvi")
1083    '("\\.pdf$" "xpdf")
1084    '("\\.doc$" "antiword" "strings")
1085    '("\\.rpm$" "rpm -qilp" "rpm -ivh")
1086    '("\\.dia$" "dia")
1087    '("\\.mgp$" "mgp")
1088
1089    ;; Some other popular archivers.
1090    (list "\\.zip$" "unzip" "unzip -l"
1091          ;; Extract files into a separate subdirectory
1092          '(concat "unzip" (if dired-guess-shell-gzip-quiet " -q")
1093                   " -d " (file-name-sans-extension file)))
1094    '("\\.zoo$" "zoo x//")
1095    '("\\.lzh$" "lharc x")
1096    '("\\.arc$" "arc x")
1097    '("\\.shar$" "unshar")
1098
1099    ;; Compression.
1100    (list "\\.g?z$" '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1101    (list "\\.dz$" "dictunzip")
1102    (list "\\.bz2$" "bunzip2")
1103    (list "\\.Z$" "uncompress"
1104          ;; Optional conversion to gzip format.
1105          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1106                   " " dired-guess-shell-znew-switches))
1107
1108    '("\\.sign?$" "gpg --verify"))
1109
1110   "Default alist used for shell command guessing.
1111 See `dired-guess-shell-alist-user'.")
1112
1113 (defcustom dired-guess-shell-alist-user nil
1114   "User-defined alist of rules for suggested commands.
1115 These rules take precedence over the predefined rules in the variable
1116 `dired-guess-shell-alist-default' (to which they are prepended).
1117
1118 Each element of this list looks like
1119
1120     \(REGEXP COMMAND...\)
1121
1122 where each COMMAND can either be a string or a Lisp expression that evaluates
1123 to a string.  If several COMMANDs are given, the first one will be the default
1124 and the rest will be added temporarily to the history and can be retrieved
1125 with \\[previous-history-element] (M-p) .
1126
1127 You can set this variable in your ~/.emacs.  For example, to add rules for
1128 `.foo' and `.bar' files, write
1129
1130  \(setq dired-guess-shell-alist-user
1131        (list (list \"\\\\.foo\\\\'\" \"FOO-COMMAND\");; fixed rule
1132               ;; possibly more rules ...
1133               (list \"\\\\.bar\\\'\";; rule with condition test
1134                     '(if condition
1135                           \"BAR-COMMAND-1\"
1136                         \"BAR-COMMAND-2\")))\)"
1137   :group 'dired-x
1138   :type '(alist :key-type regexp :value-type (repeat sexp)))
1139
1140 (defcustom dired-guess-shell-case-fold-search t
1141   "If non-nil, `dired-guess-shell-alist-default' and
1142 `dired-guess-shell-alist-user' are matched case-insensitively."
1143   :group 'dired-x
1144   :type 'boolean)
1145
1146 (defun dired-guess-default (files)
1147   "Guess a shell commands for FILES.  Return command or list of commands.
1148 See `dired-guess-shell-alist-user'."
1149
1150   (let* ((case-fold-search dired-guess-shell-case-fold-search)
1151          ;; Prepend the user's alist to the default alist.
1152          (alist (append dired-guess-shell-alist-user
1153                         dired-guess-shell-alist-default))
1154          (file (car files))
1155          (flist (cdr files))
1156          elt regexp cmds)
1157
1158     ;; Find the first match in the alist for first file in FILES.
1159     (while alist
1160       (setq elt (car alist)
1161             regexp (car elt)
1162             alist (cdr alist))
1163       (if (string-match regexp file)
1164           (setq cmds (cdr elt)
1165                 alist nil)))
1166
1167     ;; If more than one file, see if all of FILES match regular expression.
1168     (while (and flist
1169                 (string-match regexp (car flist)))
1170       (setq flist (cdr flist)))
1171
1172     ;; If flist is still non-nil, then do not guess since this means that not
1173     ;; all the files in FILES were matched by the regexp.
1174     (setq cmds (and (not flist) cmds))
1175
1176     ;; Return commands or nil if flist is still non-nil.
1177     ;; Evaluate the commands in order that any logical testing will be done.
1178     (cond ((not (cdr cmds))
1179            (eval (car cmds))) ; single command
1180           (t
1181            (mapcar (function eval) cmds)))))
1182
1183 (defun dired-guess-shell-command (prompt files)
1184   "Ask user with PROMPT for a shell command, guessing a default from FILES."
1185   (let ((default (dired-guess-default files))
1186         default-list val)
1187     (if (null default)
1188         ;; Nothing to guess
1189         (read-from-minibuffer prompt nil nil nil 'dired-shell-command-history)
1190       (if (listp default)
1191           ;; More than one guess
1192           (setq default-list default
1193                 default (car default)
1194                 prompt (concat
1195                         prompt
1196                         (format "{%d guesses} " (length default-list))))
1197         ;; Just one guess
1198         (setq default-list (list default)))
1199       ;; Put the first guess in the prompt but not in the initial value.
1200       (setq prompt (concat prompt (format "[%s] " default)))
1201       ;; All guesses can be retrieved with M-n
1202       (setq val (read-from-minibuffer prompt nil nil nil
1203                                       'dired-shell-command-history
1204                                       default-list))
1205       ;; If we got a return, then return default.
1206       (if (equal val "") default val))))
1207
1208 ;;; REDEFINE.
1209 ;;; Redefine dired-aux.el's version:
1210 (defun dired-read-shell-command (prompt arg files)
1211   "Read a dired shell command prompting with PROMPT (using read-string).
1212 ARG is the prefix arg and may be used to indicate in the prompt which
1213   files are affected.
1214 This is an extra function so that you can redefine it."
1215   (dired-mark-pop-up
1216    nil 'shell files
1217    'dired-guess-shell-command
1218    (format prompt (dired-mark-prompt arg files)) ; PROMPT
1219    files))                                       ; FILES
1220
1221 \f
1222 ;;; RELATIVE SYMBOLIC LINKS.
1223
1224 (declare-function make-symbolic-link "fileio.c")
1225
1226 (defvar dired-keep-marker-relsymlink ?S
1227   "See variable `dired-keep-marker-move'.")
1228
1229 (defun dired-make-relative-symlink (file1 file2 &optional ok-if-already-exists)
1230   "Make a symbolic link (pointing to FILE1) in FILE2.
1231 The link is relative (if possible), for example
1232
1233     \"/vol/tex/bin/foo\" \"/vol/local/bin/foo\"
1234
1235 results in
1236
1237     \"../../tex/bin/foo\" \"/vol/local/bin/foo\""
1238   (interactive "FRelSymLink: \nFRelSymLink %s: \np")
1239   (let (name1 name2 len1 len2 (index 0) sub)
1240     (setq file1 (expand-file-name file1)
1241           file2 (expand-file-name file2)
1242           len1 (length file1)
1243           len2 (length file2))
1244     ;; Find common initial file name components:
1245     (let (next)
1246       (while (and (setq next (string-match "/" file1 index))
1247                   (setq next (1+ next))
1248                   (< next (min len1 len2))
1249                   ;; For the comparison, both substrings must end in
1250                   ;; `/', so NEXT is *one plus* the result of the
1251                   ;; string-match.
1252                   ;; E.g., consider the case of linking "/tmp/a/abc"
1253                   ;; to "/tmp/abc" erroneously giving "/tmp/a" instead
1254                   ;; of "/tmp/" as common initial component
1255                   (string-equal (substring file1 0 next)
1256                                 (substring file2 0 next)))
1257         (setq index next))
1258       (setq name2 file2
1259             sub (substring file1 0 index)
1260             name1 (substring file1 index)))
1261     (if (string-equal sub "/")
1262         ;; No common initial file name found
1263         (setq name1 file1)
1264       ;; Else they have a common parent directory
1265       (let ((tem (substring file2 index))
1266             (start 0)
1267             (count 0))
1268         ;; Count number of slashes we must compensate for ...
1269         (while (setq start (string-match "/" tem start))
1270           (setq count (1+ count)
1271                 start (1+ start)))
1272         ;; ... and prepend a "../" for each slash found:
1273         (while (> count 0)
1274           (setq count (1- count)
1275                 name1 (concat "../" name1)))))
1276     (make-symbolic-link
1277      (directory-file-name name1)        ; must not link to foo/
1278                                         ; (trailing slash!)
1279      name2 ok-if-already-exists)))
1280
1281 ;;;###autoload
1282 (defun dired-do-relsymlink (&optional arg)
1283    "Relative symlink all marked (or next ARG) files into a directory.
1284 Otherwise make a relative symbolic link to the current file.
1285 This creates relative symbolic links like
1286
1287     foo -> ../bar/foo
1288
1289 not absolute ones like
1290
1291     foo -> /ugly/file/name/that/may/change/any/day/bar/foo
1292
1293 For absolute symlinks, use \\[dired-do-symlink]."
1294   (interactive "P")
1295   (dired-do-create-files 'relsymlink (function dired-make-relative-symlink)
1296                            "RelSymLink" arg dired-keep-marker-relsymlink))
1297
1298 (defun dired-do-relsymlink-regexp (regexp newname &optional arg whole-name)
1299   "RelSymlink all marked files containing REGEXP to NEWNAME.
1300 See functions `dired-do-rename-regexp' and `dired-do-relsymlink'
1301 for more info."
1302   (interactive (dired-mark-read-regexp "RelSymLink"))
1303   (dired-do-create-files-regexp
1304    (function dired-make-relative-symlink)
1305    "RelSymLink" arg regexp newname whole-name dired-keep-marker-relsymlink))
1306
1307 \f
1308 ;;; VISIT ALL MARKED FILES SIMULTANEOUSLY.
1309
1310 ;;; Brief Description:
1311 ;;;
1312 ;;; `dired-do-find-marked-files' is bound to `F' by dired-x.el.
1313 ;;;
1314 ;;; * Use `dired-get-marked-files' to collect the marked files in the current
1315 ;;;   Dired Buffer into a list of filenames `FILE-LIST'.
1316 ;;;
1317 ;;; * Pass FILE-LIST to `dired-simultaneous-find-file' all with
1318 ;;;   `dired-do-find-marked-files''s prefix argument NOSELECT.
1319 ;;;
1320 ;;; * `dired-simultaneous-find-file' runs through FILE-LIST decrementing the
1321 ;;;   list each time.
1322 ;;;
1323 ;;; * If NOSELECT is non-nil then just run `find-file-noselect'  on each
1324 ;;;   element of FILE-LIST.
1325 ;;;
1326 ;;; * If NOSELECT is nil then calculate the `size' of the window for each file
1327 ;;;   by dividing the `window-height' by length of FILE-LIST.  Thus, `size' is
1328 ;;;   cognizant of the window-configuration.
1329 ;;;
1330 ;;; * If `size' is too small abort, otherwise run `find-file' on each element
1331 ;;;   of FILE-LIST giving each a window of height `size'.
1332
1333 (defun dired-do-find-marked-files (&optional noselect)
1334   "Find all marked files displaying all of them simultaneously.
1335 With optional NOSELECT just find files but do not select them.
1336
1337 The current window is split across all files marked, as evenly as possible.
1338 Remaining lines go to bottom-most window.  The number of files that can be
1339 displayed this way is restricted by the height of the current window and
1340 `window-min-height'.
1341
1342 To keep dired buffer displayed, type \\[split-window-vertically] first.
1343 To display just marked files, type \\[delete-other-windows] first."
1344
1345   (interactive "P")
1346   (dired-simultaneous-find-file (dired-get-marked-files) noselect))
1347
1348 (defun dired-simultaneous-find-file (file-list noselect)
1349
1350   "Visit all files in FILE-LIST and display them simultaneously.
1351 The current window is split across all files in FILE-LIST, as evenly as
1352 possible.  Remaining lines go to the bottom-most window.  The number of
1353 files that can be displayed this way is restricted by the height of the
1354 current window and the variable `window-min-height'.  With non-nil
1355 NOSELECT the files are merely found but not selected."
1356
1357   ;; We don't make this function interactive because it is usually too clumsy
1358   ;; to specify FILE-LIST interactively unless via dired.
1359
1360   (let (size)
1361
1362     (if noselect
1363         ;; Do not select the buffer.
1364         (find-file-noselect (car file-list))
1365
1366       ;; We will have to select the buffer.  Calculate and check window size.
1367       (setq size (/ (window-height) (length file-list)))
1368       (or (<= window-min-height size)
1369           (error "Too many files to visit simultaneously.  Try C-u prefix"))
1370       (find-file (car file-list)))
1371
1372     ;; Decrement.
1373     (setq file-list (cdr file-list))
1374
1375     (while file-list
1376
1377       (if noselect
1378           ;; Do not select the buffer.
1379           (find-file-noselect (car file-list))
1380
1381         ;; Vertically split off a window of desired size.  Upper window will
1382         ;; have SIZE lines.  Select lower (larger) window.  We split it again.
1383         (select-window (split-window nil size))
1384         (find-file (car file-list)))
1385
1386       ;; Decrement.
1387       (setq file-list (cdr file-list)))))
1388
1389 \f
1390 ;;; MISCELLANEOUS COMMANDS.
1391
1392 ;;; Run man on files.
1393
1394 (defun dired-man ()
1395   "Run man on this file.  Display old buffer if buffer name matches filename.
1396 Uses `man.el' of \\[manual-entry] fame."
1397   (interactive)
1398   (require 'man)
1399   (let* ((file (dired-get-filename))
1400          (manual-program (replace-regexp-in-string "\\*" "%s"
1401                           (dired-guess-shell-command
1402                            "Man command: " (list file)))))
1403     (Man-getpage-in-background file)))
1404
1405 ;;; Run Info on files.
1406
1407 (defun dired-info ()
1408   "Run info on this file."
1409   (interactive)
1410   (info (dired-get-filename)))
1411
1412 ;;; Run mail on mail folders.
1413
1414 ;; Avoid compiler warning.
1415 (eval-when-compile
1416   (when (not (fboundp 'vm-visit-folder))
1417     (defun vm-visit-folder (file &optional arg)
1418       nil)))
1419
1420 (defun dired-vm (&optional read-only)
1421   "Run VM on this file.
1422 With prefix arg, visit folder read-only (this requires at least VM 5).
1423 See also variable `dired-vm-read-only-folders'."
1424   (interactive "P")
1425   (let ((dir (dired-current-directory))
1426         (fil (dired-get-filename)))
1427     ;; take care to supply 2nd arg only if requested - may still run VM 4!
1428     (cond (read-only (vm-visit-folder fil t))
1429           ((eq t dired-vm-read-only-folders) (vm-visit-folder fil t))
1430           ((null dired-vm-read-only-folders) (vm-visit-folder fil))
1431           (t (vm-visit-folder fil (not (file-writable-p fil)))))
1432     ;; so that pressing `v' inside VM does prompt within current directory:
1433     (set (make-local-variable 'vm-folder-directory) dir)))
1434
1435 (defun dired-rmail ()
1436   "Run RMAIL on this file."
1437   (interactive)
1438   (rmail (dired-get-filename)))
1439
1440 (defun dired-do-run-mail ()
1441   "If `dired-bind-vm' is t, then function `dired-vm', otherwise `dired-rmail'."
1442   (interactive)
1443   (if dired-bind-vm
1444       ;; Read mail folder using vm.
1445       (dired-vm)
1446     ;; Read mail folder using rmail.
1447     (dired-rmail)))
1448
1449 \f
1450 ;;; MISCELLANEOUS INTERNAL FUNCTIONS.
1451
1452 (declare-function dired-old-find-buffer-nocreate "dired-x")
1453
1454 (or (fboundp 'dired-old-find-buffer-nocreate)
1455     (fset 'dired-old-find-buffer-nocreate
1456           (symbol-function 'dired-find-buffer-nocreate)))
1457
1458 ;;; REDEFINE.
1459 ;;; Redefines dired.el's version of `dired-find-buffer-nocreate'
1460 (defun dired-find-buffer-nocreate (dirname &optional mode)
1461   (if (and dired-find-subdir
1462            ;; don't try to find a wildcard as a subdirectory
1463            (string-equal dirname (file-name-directory dirname)))
1464       (let* ((cur-buf (current-buffer))
1465              (buffers (nreverse
1466                        (dired-buffers-for-dir (expand-file-name dirname))))
1467              (cur-buf-matches (and (memq cur-buf buffers)
1468                                    ;; wildcards must match, too:
1469                                    (equal dired-directory dirname))))
1470         ;; We don't want to switch to the same buffer---
1471         (setq buffers (delq cur-buf buffers));;need setq with delq
1472         (or (car (sort buffers (function dired-buffer-more-recently-used-p)))
1473             ;; ---unless it's the only possibility:
1474             (and cur-buf-matches cur-buf)))
1475     (dired-old-find-buffer-nocreate dirname mode)))
1476
1477 ;; This should be a builtin
1478 (defun dired-buffer-more-recently-used-p (buffer1 buffer2)
1479   "Return t if BUFFER1 is more recently used than BUFFER2."
1480   (if (equal buffer1 buffer2)
1481       nil
1482     (let ((more-recent nil)
1483           (list (buffer-list)))
1484       (while (and list
1485                   (not (setq more-recent (equal buffer1 (car list))))
1486                   (not (equal buffer2 (car list))))
1487         (setq list (cdr list)))
1488       more-recent)))
1489
1490 ;;; Same thing as `dired-buffers-for-dir' of dired.el? - lrd 11/23/93
1491 ;;; (defun dired-buffers-for-dir-exact (dir)
1492 ;;; ;; Return a list of buffers that dired DIR (a directory or wildcard)
1493 ;;; ;; at top level, or as subdirectory.
1494 ;;; ;; Top level matches must match the wildcard part too, if any.
1495 ;;; ;; The list is in reverse order of buffer creation, most recent last.
1496 ;;; ;; As a side effect, killed dired buffers for DIR are removed from
1497 ;;; ;; dired-buffers.
1498 ;;;   (let ((alist dired-buffers) result elt)
1499 ;;;     (while alist
1500 ;;;       (setq elt (car alist)
1501 ;;;             alist (cdr alist))
1502 ;;;       (let ((buf (cdr elt)))
1503 ;;;         (if (buffer-name buf)
1504 ;;;             ;; Top level must match exactly against dired-directory in
1505 ;;;             ;; case one of them is a wildcard.
1506 ;;;             (if (or (equal dir (save-excursion (set-buffer buf)
1507 ;;;                                                dired-directory))
1508 ;;;                     (assoc dir (save-excursion (set-buffer buf)
1509 ;;;                                                dired-subdir-alist)))
1510 ;;;                 (setq result (cons buf result)))
1511 ;;;           ;; else buffer is killed - clean up:
1512 ;;;           (setq dired-buffers (delq elt dired-buffers)))))
1513 ;;;     result))
1514
1515 ;;; REDEFINE.
1516 ;;; Redefines dired.el's version of `dired-initial-position'
1517 (defun dired-initial-position (dirname)
1518   "Where point should go in a new listing of DIRNAME.
1519 Point assumed at beginning of new subdir line.
1520 You may redefine this function as you wish, e.g. like in `dired-x.el'."
1521   (end-of-line)
1522   (if dired-find-subdir (dired-goto-subdir dirname)) ; new
1523   (if dired-trivial-filenames (dired-goto-next-nontrivial-file)))
1524
1525 \f
1526 ;; Does anyone use this? - lrd 6/29/93.
1527 ;; Apparently people do use it. - lrd 12/22/97.
1528 (defun dired-mark-sexp (predicate &optional unflag-p)
1529   "Mark files for which PREDICATE returns non-nil.
1530 With a prefix arg, unflag those files instead.
1531
1532 PREDICATE is a lisp expression that can refer to the following symbols:
1533
1534     inode  [integer] the inode of the file (only for ls -i output)
1535     s      [integer] the size of the file for ls -s output
1536                      (usually in blocks or, with -k, in KByte)
1537     mode   [string]  file permission bits, e.g. \"-rw-r--r--\"
1538     nlink  [integer] number of links to file
1539     uid    [string]  owner
1540     gid    [string]  group  (If the gid is not displayed by ls,
1541                      this will still be set (to the same as uid))
1542     size   [integer] file size in bytes
1543     time   [string]  the time that ls displays, e.g. \"Feb 12 14:17\"
1544     name   [string]  the name of the file
1545     sym    [string]  if file is a symbolic link, the linked-to name, else \"\"
1546
1547 For example, use
1548
1549         (equal 0 size)
1550
1551 to mark all zero length files."
1552   ;; Using sym="" instead of nil avoids the trap of
1553   ;; (string-match "foo" sym) into which a user would soon fall.
1554   ;; Give `equal' instead of `=' in the example, as this works on
1555   ;; integers and strings.
1556   (interactive "xMark if (lisp expr): \nP")
1557   (message "%s" predicate)
1558   (let ((dired-marker-char (if unflag-p ?\040 dired-marker-char))
1559         inode s mode nlink uid gid size time name sym)
1560     (dired-mark-if
1561      (save-excursion
1562        (and
1563         ;; Sets vars
1564         ;;                inode s mode nlink uid gid size time name sym
1565
1566         ;; according to current file line.  Returns t for success, nil if
1567         ;; there is no file line.  Upon success, all variables are set, either
1568         ;; to nil or the appropriate value, so they need not be initialized.
1569         ;; Moves point within the current line.
1570         (if (dired-move-to-filename)
1571             (let (pos
1572                   (mode-len 10) ; length of mode string
1573                   ;; like in dired.el, but with subexpressions \1=inode, \2=s:
1574                   (dired-re-inode-size "\\s *\\([0-9]*\\)\\s *\\([0-9]*\\) ?"))
1575               (beginning-of-line)
1576               (forward-char 2)
1577               (if (looking-at dired-re-inode-size)
1578                   (progn
1579                     (goto-char (match-end 0))
1580                     (setq inode (string-to-number (buffer-substring (match-beginning 1)
1581                                                                     (match-end 1)))
1582                           s (string-to-number (buffer-substring (match-beginning 2)
1583                                                                 (match-end 2)))))
1584                 (setq inode nil
1585                       s nil))
1586               (setq mode (buffer-substring (point) (+ mode-len (point))))
1587               (forward-char mode-len)
1588               (setq nlink (read (current-buffer)))
1589               ;; Karsten Wenger <kw@cis.uni-muenchen.de> fixed uid.
1590               (setq uid (buffer-substring (+ (point) 1)
1591                                           (progn (forward-word 1) (point))))
1592               (re-search-forward directory-listing-before-filename-regexp)
1593               (goto-char (match-beginning 1))
1594               (forward-char -1)
1595               (setq size (string-to-number (buffer-substring (save-excursion
1596                                                                (backward-word 1)
1597                                                                (setq pos (point)))
1598                                                              (point))))
1599               (goto-char pos)
1600               (backward-word 1)
1601               ;; if no gid is displayed, gid will be set to uid
1602               ;; but user will then not reference it anyway in PREDICATE.
1603               (setq gid (buffer-substring (save-excursion
1604                                             (forward-word 1) (point))
1605                                           (point))
1606                     time (buffer-substring (match-beginning 1)
1607                                            (1- (dired-move-to-filename)))
1608                     name (buffer-substring (point)
1609                                            (or
1610                                             (dired-move-to-end-of-filename t)
1611                                             (point)))
1612                     sym  (progn
1613                            (if (looking-at " -> ")
1614                                (buffer-substring
1615                                 (progn (forward-char 4) (point))
1616                                 (progn (end-of-line) (point)))
1617                              "")))
1618               t)
1619           nil)
1620                       (eval predicate)))
1621      (format "'%s file" predicate))))
1622
1623 \f
1624 ;;; FIND FILE AT POINT.
1625
1626 (defvar dired-x-hands-off-my-keys t
1627   "*Non-nil means don't bind `dired-x-find-file' over `find-file' on keyboard.
1628 Similarly for `dired-x-find-file-other-window' over `find-file-other-window'.
1629 If you change this variable after `dired-x.el' is loaded then do
1630 \\[dired-x-bind-find-file].")
1631
1632 ;;; Bind `dired-x-find-file{-other-window}' over wherever
1633 ;;; `find-file{-other-window}' is bound?
1634 (defun dired-x-bind-find-file ()
1635   "Bind `dired-x-find-file' in place of `find-file' \(or reverse\).
1636 Similarly for `dired-x-find-file-other-window' and `find-file-other-window'.
1637 Binding direction based on `dired-x-hands-off-my-keys'.
1638 This function is part of `after-init-hook'."
1639   (interactive)
1640   (if (interactive-p)
1641       (setq dired-x-hands-off-my-keys
1642             (not (y-or-n-p "Bind dired-x-find-file over find-file? "))))
1643   (cond ((not dired-x-hands-off-my-keys)
1644          (substitute-key-definition 'find-file
1645                                     'dired-x-find-file
1646                                     (current-global-map))
1647          (substitute-key-definition 'find-file-other-window
1648                                     'dired-x-find-file-other-window
1649                                     (current-global-map)))
1650         (t
1651          (substitute-key-definition 'dired-x-find-file
1652                                     'find-file
1653                                     (current-global-map))
1654          (substitute-key-definition 'dired-x-find-file-other-window
1655                                     'find-file-other-window
1656                                     (current-global-map))))
1657   ;; Clear mini-buffer.
1658   (message nil))
1659
1660 ;;; Now call it so binding is correct and put on `after-init-hook' in case
1661 ;;; user changes binding.
1662 (dired-x-bind-find-file)
1663 (add-hook 'after-init-hook 'dired-x-bind-find-file)
1664
1665 (defun dired-x-find-file (filename)
1666   "Edit file FILENAME.
1667 May create a new window, or reuse an existing one.
1668 See the function `display-buffer'.
1669
1670 Identical to `find-file' except when called interactively, with a prefix arg
1671 \(e.g., \\[universal-argument]\), in which case it guesses filename near point.
1672 Useful for editing file mentioned in buffer you are viewing,
1673 or to test if that file exists.  Use minibuffer after snatching filename."
1674   (interactive (list (read-filename-at-point "Find file: ")))
1675   (find-file (expand-file-name filename)))
1676
1677 (defun dired-x-find-file-other-window (filename)
1678   "Edit file FILENAME, in another window.
1679 May create a new window, or reuse an existing one.
1680 See the function `display-buffer'.
1681
1682 Identical to `find-file-other-window' except when called interactively, with a
1683 prefix arg \(e.g., \\[universal-argument]\), in which case it guesses filename near point.
1684 Useful for editing file mentioned in buffer you are viewing,
1685 or to test if that file exists.  Use minibuffer after snatching filename."
1686   (interactive (list (read-filename-at-point "Find file: ")))
1687   (find-file-other-window (expand-file-name filename)))
1688
1689 ;;; Internal functions.
1690
1691 ;; Fixme: This should probably use `thing-at-point'.  -- fx
1692 (defun dired-filename-at-point ()
1693   "Get the filename closest to point, but do not change position.
1694 Has a preference for looking backward when not directly on a symbol.  Not
1695 perfect - point must be in middle of or end of filename."
1696
1697   (let ((filename-chars "-.[:alnum:]_/:$+@")
1698         start end filename prefix)
1699
1700     (save-excursion
1701       ;; First see if just past a filename.
1702       (if (not (eobp))
1703           (if (looking-at "[] \t\n[{}()]") ; whitespace or some parens
1704               (progn
1705                 (skip-chars-backward " \n\t\r({[]})")
1706                 (if (not (bobp))
1707                     (backward-char 1)))))
1708
1709       (if (string-match (concat "[" filename-chars "]")
1710                         (char-to-string (following-char)))
1711           (progn
1712             (if (re-search-backward (concat "[^" filename-chars "]") nil t)
1713                 (forward-char)
1714               (goto-char (point-min)))
1715             (setq start (point))
1716             (setq prefix
1717                   (and (string-match
1718                         "^\\w+@"
1719                         (buffer-substring start (line-beginning-position)))
1720                        "/"))
1721             (goto-char start)
1722             (if (string-match "[/~]" (char-to-string (preceding-char)))
1723                 (setq start (1- start)))
1724             (re-search-forward (concat "\\=[" filename-chars "]*") nil t))
1725
1726         (error "No file found around point!"))
1727
1728       ;; Return string.
1729       (expand-file-name (concat prefix (buffer-substring start (point)))))))
1730
1731 (defun read-filename-at-point (prompt)
1732   "Return filename prompting with PROMPT with completion.
1733 If `current-prefix-arg' is non-nil, uses name at point as guess."
1734   (if current-prefix-arg
1735       (let ((guess (dired-filename-at-point)))
1736         (read-file-name prompt
1737                         (file-name-directory guess)
1738                         guess
1739                         nil (file-name-nondirectory guess)))
1740     (read-file-name prompt default-directory)))
1741 \f
1742 ;;; BUG REPORTS
1743
1744 ;; Fixme: get rid of this later.
1745
1746 ;;; This section is provided for reports.  It uses Barry A. Warsaw's
1747 ;;; reporter.el which is bundled with GNU Emacs v19.
1748
1749 (defconst dired-x-help-address "bug-gnu-emacs@gnu.org"
1750   "Address(es) accepting submission of reports on dired-x.el.")
1751
1752 (defconst dired-x-variable-list
1753   (list
1754    'dired-bind-vm
1755    'dired-vm-read-only-folders
1756    'dired-bind-jump
1757    'dired-bind-info
1758    'dired-bind-man
1759    'dired-find-subdir
1760    'dired-enable-local-variables
1761    'dired-local-variables-file
1762    'dired-guess-shell-gnutar
1763    'dired-guess-shell-gzip-quiet
1764    'dired-guess-shell-znew-switches
1765    'dired-guess-shell-alist-user
1766    'dired-clean-up-buffers-too
1767    'dired-omit-mode
1768    'dired-omit-files
1769    'dired-omit-extensions
1770    )
1771   "List of variables to be appended to reports sent by `dired-x-submit-report'.")
1772
1773 (defun dired-x-submit-report ()
1774   "Submit via `reporter.el' a bug report on program.
1775 Send report on `dired-x-file' version `dired-x-version,' to
1776 `dired-x-maintainer' at address `dired-x-help-address' listing
1777 variables `dired-x-variable-list' in the message."
1778   (interactive)
1779
1780   (reporter-submit-bug-report
1781    dired-x-help-address                 ; address
1782    "dired-x"                            ; pkgname
1783    dired-x-variable-list                ; varlist
1784    nil nil                              ; pre-/post-hooks
1785    ""))
1786
1787 \f
1788 ;; As Barry Warsaw would say: "This might be useful..."
1789 (provide 'dired-x)
1790
1791 ;; arch-tag: 71a43ba2-7a00-4793-a028-0613dd7765ae
1792 ;;; dired-x.el ends here