lisp/dired-x.el

   1 ;;; dired-x.el --- extra Dired functionality -*-byte-compile-dynamic: t;-*-
   2
   3 ;; Author: Sebastian Kremer <sk@thp.uni-koeln.de>
   4 ;;      Lawrence R. Dodd <dodd@roebling.poly.edu>
   5 ;; Maintainer: Romain Francoise <rfrancoise@gnu.org>
   6 ;; Version: 2.37+
   7 ;; Date: 1994/08/18 19:27:42
   8 ;; Keywords: dired extensions files
   9
  10 ;; Copyright (C) 1993, 1994, 1997, 2001, 2002, 2003, 2004,
  11 ;;   2005, 2006, 2007 Free Software Foundation, Inc.
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software; you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation; either version 3, or (at your option)
  18 ;; any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  27 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  28 ;; Boston, MA 02110-1301, USA.
  29
  30 ;;; Commentary:
  31
  32 ;; This is Sebastian Kremer's excellent dired-x.el (Dired Extra), version
  33 ;; 1.191, hacked up for GNU Emacs.  Redundant or conflicting material has
  34 ;; been removed or renamed in order to work properly with dired of GNU
  35 ;; Emacs.  All suggestions or comments are most welcomed.
  36
  37 ;;
  38 ;; Please, PLEASE, *PLEASE* see the info pages.
  39 ;;
  40
  41 ;; BUGS: Type M-x dired-x-submit-report and a report will be generated.
  42
  43 ;; INSTALLATION: In your ~/.emacs,
  44 ;;
  45 ;; (add-hook 'dired-load-hook
  46 ;;           (function (lambda ()
  47 ;;                       (load "dired-x")
  48 ;;                       ;; Set global variables here.  For example:
  49 ;;                       ;; (setq dired-guess-shell-gnutar "gtar")
  50 ;;                       )))
  51 ;; (add-hook 'dired-mode-hook
  52 ;;           (function (lambda ()
  53 ;;                       ;; Set buffer-local variables here.  For example:
  54 ;;                       ;; (dired-omit-mode 1)
  55 ;;                       )))
  56 ;;
  57 ;; At load time dired-x.el will install itself, redefine some functions, and
  58 ;; bind some dired keys.  *Please* see the info pages for more details.
  59
  60 ;; *Please* see the info pages for more details.
  61
  62 ;; User defined variables:
  63 ;;
  64 ;;      dired-bind-vm
  65 ;;      dired-vm-read-only-folders
  66 ;;      dired-bind-jump
  67 ;;      dired-bind-info
  68 ;;      dired-bind-man
  69 ;;      dired-x-hands-off-my-keys
  70 ;;      dired-find-subdir
  71 ;;      dired-enable-local-variables
  72 ;;      dired-local-variables-file
  73 ;;      dired-guess-shell-gnutar
  74 ;;      dired-guess-shell-gzip-quiet
  75 ;;      dired-guess-shell-znew-switches
  76 ;;      dired-guess-shell-alist-user
  77 ;;      dired-clean-up-buffers-too
  78 ;;      dired-omit-mode
  79 ;;      dired-omit-files
  80 ;;      dired-omit-extensions
  81 ;;      dired-omit-size-limit
  82 ;;
  83 ;; To find out more about these variables, load this file, put your cursor at
  84 ;; the end of any of the variable names, and hit C-h v [RET].  *Please* see
  85 ;; the info pages for more details.
  86
  87 ;; When loaded this code redefines the following functions of GNU Emacs
  88 ;;
  89 ;;   Function                         Found in this file of GNU Emacs
  90 ;;   --------                         -------------------------------
  91 ;;   dired-clean-up-after-deletion    ../lisp/dired.el
  92 ;;   dired-find-buffer-nocreate       ../lisp/dired.el
  93 ;;   dired-initial-position           ../lisp/dired.el
  94 ;;
  95 ;;   dired-add-entry                  ../lisp/dired-aux.el
  96 ;;   dired-read-shell-command         ../lisp/dired-aux.el
  97
  98 \f
  99 ;;; Code:
 100
 101 ;; LOAD.
 102
 103 ;; This is a no-op if dired-x is being loaded via `dired-load-hook'.  It is
 104 ;; here in case the user has autoloaded dired-x via the dired-jump key binding
 105 ;; (instead of autoloading to dired as is suggested in the info-pages).
 106
 107 (require 'dired)
 108
 109 ;; We will redefine some functions and also need some macros so we need to
 110 ;; load dired stuff of GNU Emacs.
 111
 112 (require 'dired-aux)
 113
 114 (defvar vm-folder-directory)
 115 (eval-when-compile (require 'man))
 116
 117 ;;; User-defined variables.
 118
 119 (defgroup dired-x nil
 120   "Extended directory editing (dired-x)."
 121   :group 'dired)
 122
 123 (defgroup dired-keys nil
 124   "Dired keys customizations."
 125   :prefix "dired-"
 126   :group 'dired-x)
 127
 128 (defcustom dired-bind-vm nil
 129   "*Non-nil means \"V\" runs `dired-vm', otherwise \"V\" runs `dired-rmail'.
 130 Also, RMAIL files contain -*- rmail -*- at the top so \"f\",
 131 `dired-advertised-find-file', will run rmail."
 132   :type 'boolean
 133   :group 'dired-keys)
 134
 135 (defcustom dired-bind-jump t
 136   "*Non-nil means bind `dired-jump' to C-x C-j, otherwise do not."
 137   :type 'boolean
 138   :group 'dired-keys)
 139
 140 (defcustom dired-bind-man t
 141   "*Non-nil means bind `dired-man' to \"N\" in dired-mode, otherwise do not."
 142   :type 'boolean
 143   :group 'dired-keys)
 144
 145 (defcustom dired-bind-info t
 146   "*Non-nil means bind `dired-info' to \"I\" in dired-mode, otherwise do not."
 147   :type 'boolean
 148   :group 'dired-keys)
 149
 150 (defcustom dired-vm-read-only-folders nil
 151   "*If non-nil, \\[dired-vm] will visit all folders read-only.
 152 If neither nil nor t, e.g. the symbol `if-file-read-only', only
 153 files not writable by you are visited read-only.
 154
 155 Read-only folders only work in VM 5, not in VM 4."
 156   :type '(choice (const :tag "off" nil)
 157                  (const :tag "on" t)
 158                  (other :tag "non-writable only" if-file-read-only))
 159   :group 'dired-x)
 160
 161 (define-minor-mode dired-omit-mode
 162   "Toggle Dired-Omit mode.
 163 With numeric ARG, enable Dired-Omit mode if ARG is positive, disable
 164 otherwise.  Enabling and disabling is buffer-local.
 165 If enabled, \"uninteresting\" files are not listed.
 166 Uninteresting files are those whose filenames match regexp `dired-omit-files',
 167 plus those ending with extensions in `dired-omit-extensions'."
 168   :group 'dired-x
 169   (if dired-omit-mode
 170       ;; This will mention how many lines were omitted:
 171       (let ((dired-omit-size-limit nil)) (dired-omit-expunge))
 172     (revert-buffer)))
 173
 174 ;; For backward compatibility
 175 (defvaralias 'dired-omit-files-p 'dired-omit-mode)
 176 (make-obsolete-variable 'dired-omit-files-p 'dired-omit-mode)
 177
 178 (defcustom dired-omit-files "^\\.?#\\|^\\.$\\|^\\.\\.$"
 179   "*Filenames matching this regexp will not be displayed.
 180 This only has effect when `dired-omit-mode' is t.  See interactive function
 181 `dired-omit-mode' \(\\[dired-omit-mode]\) and variable
 182 `dired-omit-extensions'.  The default is to omit  `.', `..', auto-save
 183 files and lock files."
 184   :type 'regexp
 185   :group 'dired-x)
 186
 187 (defcustom dired-find-subdir nil           ; t is pretty near to DWIM...
 188   "*If non-nil, Dired always finds a directory in a buffer of its own.
 189 If nil, Dired finds the directory as a subdirectory in some other buffer
 190 if it is present as one.
 191
 192 If there are several dired buffers for a directory, the most recently
 193 used is chosen.
 194
 195 Dired avoids switching to the current buffer, so that if you have
 196 a normal and a wildcard buffer for the same directory, \\[dired] will
 197 toggle between those two."
 198   :type 'boolean
 199   :group 'dired-x)
 200
 201 (defcustom dired-omit-size-limit 30000
 202   "*Maximum size for the \"omitting\" feature.
 203 If nil, there is no maximum size."
 204   :type '(choice (const :tag "no maximum" nil) integer)
 205   :group 'dired-x)
 206
 207 (defcustom dired-enable-local-variables t
 208   "*Control use of local-variables lists in Dired.
 209 The value can be t, nil or something else.
 210 A value of t means local-variables lists are obeyed;
 211 nil means they are ignored; anything else means query.
 212
 213 This temporarily overrides the value of `enable-local-variables' when listing
 214 a directory.  See also `dired-local-variables-file'."
 215   :type 'boolean
 216   :group 'dired-x)
 217
 218 (defcustom dired-guess-shell-gnutar (when (or (eq system-type 'gnu)
 219                                               (eq system-type 'gnu/linux))
 220                                       "tar")
 221   "*If non-nil, name of GNU tar executable.
 222 \(E.g., \"tar\" or \"gtar\").  The `z' switch will be used with it for
 223 compressed or gzip'ed tar files.  If you don't have GNU tar, set this
 224 to nil: a pipe using `zcat' or `gunzip -c' will be used."
 225   :type '(choice (const :tag "Not GNU tar" nil)
 226                  (string :tag "Command name"))
 227   :group 'dired-x)
 228
 229 (defcustom dired-guess-shell-gzip-quiet t
 230   "*Non-nil says pass -q to gzip overriding verbose GZIP environment."
 231   :type 'boolean
 232   :group 'dired-x)
 233
 234 (defcustom dired-guess-shell-znew-switches nil
 235   "*If non-nil, then string of switches passed to `znew', example: \"-K\"."
 236   :type '(choice (const :tag "None" nil)
 237                  (string :tag "Switches"))
 238   :group 'dired-x)
 239
 240 (defcustom dired-clean-up-buffers-too t
 241   "*Non-nil means offer to kill buffers visiting files and dirs deleted in Dired."
 242   :type 'boolean
 243   :group 'dired-x)
 244
 245 ;;; KEY BINDINGS.
 246
 247 (define-key dired-mode-map "\M-o" 'dired-omit-mode)
 248 (define-key dired-mode-map "*O" 'dired-mark-omitted)
 249 (define-key dired-mode-map "\M-(" 'dired-mark-sexp)
 250 (define-key dired-mode-map "*(" 'dired-mark-sexp)
 251 (define-key dired-mode-map "*." 'dired-mark-extension)
 252 (define-key dired-mode-map "\M-!" 'dired-smart-shell-command)
 253 (define-key dired-mode-map "w" 'dired-copy-filename-as-kill)
 254 (define-key dired-mode-map "\M-G" 'dired-goto-subdir)
 255 (define-key dired-mode-map "F" 'dired-do-find-marked-files)
 256 (define-key dired-mode-map "Y"  'dired-do-relsymlink)
 257 (define-key dired-mode-map "%Y" 'dired-do-relsymlink-regexp)
 258 (define-key dired-mode-map "V" 'dired-do-run-mail)
 259
 260 (if dired-bind-man
 261     (define-key dired-mode-map "N" 'dired-man))
 262
 263 (if dired-bind-info
 264     (define-key dired-mode-map "I" 'dired-info))
 265
 266 ;;; MENU BINDINGS
 267
 268 (let ((menu-bar (lookup-key dired-mode-map [menu-bar])))
 269   (let ((menu (lookup-key menu-bar [operate])))
 270     (define-key-after
 271       menu
 272       [find-files]
 273       '(menu-item
 274         "Find files"
 275         dired-do-find-marked-files
 276         :help "Find current or marked files")
 277       'delete)
 278     (define-key-after
 279       menu
 280       [relsymlink]
 281       '(menu-item
 282         "Relative symlink to..."
 283         dired-do-relsymlink
 284         :visible (fboundp 'make-symbolic-link)
 285         :help "Make relative symbolic links for current or marked files")
 286       'symlink))
 287   (let ((menu (lookup-key menu-bar [mark])))
 288     (define-key-after
 289       menu
 290       [flag-extension]
 291       '(menu-item
 292         "Flag extension..."
 293         dired-flag-extension
 294         :help "Flag files with a certain extension for deletion")
 295       'garbage-files)
 296     (define-key-after
 297       menu
 298       [mark-extension]
 299       '(menu-item
 300         "Mark extension..."
 301         dired-mark-extension
 302         :help "Mark files with a certain extension")
 303       'symlinks)
 304     (define-key-after
 305       menu
 306       [mark-omitted]
 307       '(menu-item
 308         "Mark omitted"
 309         dired-mark-omitted
 310         :help "Mark files matching `dired-omit-files' and `dired-omit-extensions'")
 311       'mark-extension))
 312   (let ((menu (lookup-key menu-bar [regexp])))
 313     (define-key-after
 314       menu
 315       [relsymlink-regexp]
 316       '(menu-item
 317         "Relative symlink..."
 318         dired-do-relsymlink-regexp
 319         :visible (fboundp 'make-symbolic-link)
 320         :help "Make relative symbolic links for files matching regexp")
 321       'symlink))
 322   (let ((menu (lookup-key menu-bar [immediate])))
 323     (define-key-after
 324       menu
 325       [omit-mode]
 326       '(menu-item
 327         "Omit mode" dired-omit-mode
 328         :button (:toggle . dired-omit-mode)
 329         :help "Enable or disable omitting \"uninteresting\" files")
 330       'dashes)))
 331
 332 ;;; GLOBAL BINDING.
 333 (if dired-bind-jump
 334     (progn
 335       (define-key global-map "\C-x\C-j" 'dired-jump)
 336       (define-key global-map "\C-x4\C-j" 'dired-jump-other-window)))
 337
 338 \f
 339 ;;; Install into appropriate hooks.
 340
 341 (add-hook 'dired-mode-hook 'dired-extra-startup)
 342 (add-hook 'dired-after-readin-hook 'dired-omit-expunge)
 343
 344 (defun dired-extra-startup ()
 345   "Automatically put on `dired-mode-hook' to get extra Dired features:
 346 \\<dired-mode-map>
 347   \\[dired-do-run-mail]\t-- run mail on folder (see `dired-bind-vm')
 348   \\[dired-info]\t-- run info on file
 349   \\[dired-man]\t-- run man on file
 350   \\[dired-do-find-marked-files]\t-- visit all marked files simultaneously
 351   \\[dired-omit-mode]\t-- toggle omitting of files
 352   \\[dired-mark-sexp]\t-- mark by Lisp expression
 353   \\[dired-copy-filename-as-kill]\t-- copy the file or subdir names into the kill ring;
 354   \t   you can feed it to other commands using \\[yank]
 355
 356 For more features, see variables
 357
 358   `dired-bind-vm'
 359   `dired-bind-jump'
 360   `dired-bind-info'
 361   `dired-bind-man'
 362   `dired-vm-read-only-folders'
 363   `dired-omit-mode'
 364   `dired-omit-files'
 365   `dired-omit-extensions'
 366   `dired-omit-size-limit'
 367   `dired-find-subdir'
 368   `dired-enable-local-variables'
 369   `dired-local-variables-file'
 370   `dired-guess-shell-gnutar'
 371   `dired-guess-shell-gzip-quiet'
 372   `dired-guess-shell-znew-switches'
 373   `dired-guess-shell-alist-user'
 374   `dired-clean-up-buffers-too'
 375
 376 See also functions
 377
 378   `dired-flag-extension'
 379   `dired-virtual'
 380   `dired-jump'
 381   `dired-man'
 382   `dired-vm'
 383   `dired-rmail'
 384   `dired-info'
 385   `dired-do-find-marked-files'"
 386   (interactive)
 387
 388   ;; These must be done in each new dired buffer.
 389   (dired-hack-local-variables)
 390   (dired-omit-startup))
 391
 392 \f
 393 ;;; BUFFER CLEANING.
 394
 395 ;; REDEFINE.
 396 (defun dired-clean-up-after-deletion (fn)
 397   "Clean up after a deleted file or directory FN.
 398 Remove expanded subdir of deleted dir, if any."
 399   (save-excursion (and (cdr dired-subdir-alist)
 400                        (dired-goto-subdir fn)
 401                        (dired-kill-subdir)))
 402
 403   ;; Offer to kill buffer of deleted file FN.
 404   (if dired-clean-up-buffers-too
 405       (progn
 406         (let ((buf (get-file-buffer fn)))
 407           (and buf
 408                (funcall (function y-or-n-p)
 409                         (format "Kill buffer of %s, too? "
 410                                 (file-name-nondirectory fn)))
 411                (save-excursion ; you never know where kill-buffer leaves you
 412                  (kill-buffer buf))))
 413         (let ((buf-list (dired-buffers-for-dir (expand-file-name fn)))
 414               (buf nil))
 415           (and buf-list
 416                (y-or-n-p (format "Kill dired buffer%s of %s, too? "
 417                                  (dired-plural-s (length buf-list))
 418                                  (file-name-nondirectory fn)))
 419                (while buf-list
 420                  (save-excursion (kill-buffer (car buf-list)))
 421                  (setq buf-list (cdr buf-list)))))))
 422   ;; Anything else?
 423   )
 424
 425 \f
 426 ;;; EXTENSION MARKING FUNCTIONS.
 427
 428 ;;; Mark files with some extension.
 429 (defun dired-mark-extension (extension &optional marker-char)
 430   "Mark all files with a certain EXTENSION for use in later commands.
 431 A `.' is *not* automatically prepended to the string entered."
 432   ;; EXTENSION may also be a list of extensions instead of a single one.
 433   ;; Optional MARKER-CHAR is marker to use.
 434   (interactive "sMarking extension: \nP")
 435   (or (listp extension)
 436       (setq extension (list extension)))
 437   (dired-mark-files-regexp
 438    (concat ".";; don't match names with nothing but an extension
 439            "\\("
 440            (mapconcat 'regexp-quote extension "\\|")
 441            "\\)$")
 442    marker-char))
 443
 444 (defun dired-flag-extension (extension)
 445   "In dired, flag all files with a certain EXTENSION for deletion.
 446 A `.' is *not* automatically prepended to the string entered."
 447   (interactive "sFlagging extension: ")
 448   (dired-mark-extension extension dired-del-marker))
 449
 450 ;;; Define some unpopular file extensions.  Used for cleaning and omitting.
 451
 452 (defvar dired-patch-unclean-extensions
 453   '(".rej" ".orig")
 454   "List of extensions of dispensable files created by the `patch' program.")
 455
 456 (defvar dired-tex-unclean-extensions
 457   '(".toc" ".log" ".aux");; these are already in completion-ignored-extensions
 458   "List of extensions of dispensable files created by TeX.")
 459
 460 (defvar dired-latex-unclean-extensions
 461   '(".idx" ".lof" ".lot" ".glo")
 462   "List of extensions of dispensable files created by LaTeX.")
 463
 464 (defvar dired-bibtex-unclean-extensions
 465   '(".blg" ".bbl")
 466   "List of extensions of dispensable files created by BibTeX.")
 467
 468 (defvar dired-texinfo-unclean-extensions
 469   '(".cp" ".cps" ".fn" ".fns" ".ky" ".kys" ".pg" ".pgs"
 470     ".tp" ".tps" ".vr" ".vrs")
 471   "List of extensions of dispensable files created by texinfo.")
 472
 473 (defun dired-clean-patch ()
 474   "Flag dispensable files created by patch for deletion.
 475 See variable `dired-patch-unclean-extensions'."
 476   (interactive)
 477   (dired-flag-extension dired-patch-unclean-extensions))
 478
 479 (defun dired-clean-tex ()
 480   "Flag dispensable files created by [La]TeX etc. for deletion.
 481 See variables `dired-tex-unclean-extensions',
 482 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 483 `dired-texinfo-unclean-extensions'."
 484   (interactive)
 485   (dired-flag-extension (append dired-texinfo-unclean-extensions
 486                                 dired-latex-unclean-extensions
 487                                 dired-bibtex-unclean-extensions
 488                                 dired-tex-unclean-extensions)))
 489
 490 (defun dired-very-clean-tex ()
 491   "Flag dispensable files created by [La]TeX *and* \".dvi\" for deletion.
 492 See variables `dired-texinfo-unclean-extensions',
 493 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 494 `dired-texinfo-unclean-extensions'."
 495   (interactive)
 496   (dired-flag-extension (append dired-texinfo-unclean-extensions
 497                                 dired-latex-unclean-extensions
 498                                 dired-bibtex-unclean-extensions
 499                                 dired-tex-unclean-extensions
 500                                 (list ".dvi"))))
 501 \f
 502 ;;; JUMP.
 503
 504 ;;;###autoload
 505 (defun dired-jump (&optional other-window)
 506   "Jump to dired buffer corresponding to current buffer.
 507 If in a file, dired the current directory and move to file's line.
 508 If in Dired already, pop up a level and goto old directory's line.
 509 In case the proper dired file line cannot be found, refresh the dired
 510 buffer and try again."
 511   (interactive "P")
 512   (let* ((file buffer-file-name)
 513          (dir (if file (file-name-directory file) default-directory)))
 514     (if (eq major-mode 'dired-mode)
 515         (progn
 516           (setq dir (dired-current-directory))
 517           (dired-up-directory other-window)
 518           (or (dired-goto-file dir)
 519               ;; refresh and try again
 520               (progn
 521                 (dired-insert-subdir (file-name-directory dir))
 522                 (dired-goto-file dir))))
 523       (if other-window
 524           (dired-other-window dir)
 525         (dired dir))
 526       (if file
 527           (or (dired-goto-file file)
 528               ;; refresh and try again
 529               (progn
 530                 (dired-insert-subdir (file-name-directory file))
 531                 (dired-goto-file file))
 532               ;; Toggle omitting, if it is on, and try again.
 533               (if dired-omit-mode
 534                   (progn
 535                     (dired-omit-mode)
 536                     (dired-goto-file file))))))))
 537
 538 (defun dired-jump-other-window ()
 539   "Like \\[dired-jump] (`dired-jump') but in other window."
 540   (interactive)
 541   (dired-jump t))
 542 \f
 543 ;;; OMITTING.
 544
 545 ;;; Enhanced omitting of lines from directory listings.
 546 ;;; Marked files are never omitted.
 547
 548 ;; should probably get rid of this and always use 'no-dir.
 549 ;; sk 28-Aug-1991 09:37
 550 (defvar dired-omit-localp 'no-dir
 551   "The LOCALP argument `dired-omit-expunge' passes to `dired-get-filename'.
 552 If it is `no-dir', omitting is much faster, but you can only match
 553 against the non-directory part of the file name.  Set it to nil if you
 554 need to match the entire file name.")
 555
 556 ;; \017=^O for Omit - other packages can chose other control characters.
 557 (defvar dired-omit-marker-char ?\017
 558   "Temporary marker used by dired-omit.
 559 Should never be used as marker by the user or other packages.")
 560
 561 (defun dired-omit-startup ()
 562   (or (assq 'dired-omit-mode minor-mode-alist)
 563       (setq minor-mode-alist
 564             (append '((dired-omit-mode
 565                        (:eval (if (eq major-mode 'dired-mode)
 566                                   " Omit" ""))))
 567                     minor-mode-alist))))
 568
 569 (defun dired-mark-omitted ()
 570   "Mark files matching `dired-omit-files' and `dired-omit-extensions'."
 571   (interactive)
 572   (let ((dired-omit-mode nil)) (revert-buffer)) ;; Show omitted files
 573   (dired-mark-unmarked-files (dired-omit-regexp) nil nil dired-omit-localp))
 574
 575 (defvar dired-omit-extensions
 576   (append completion-ignored-extensions
 577           dired-latex-unclean-extensions
 578           dired-bibtex-unclean-extensions
 579           dired-texinfo-unclean-extensions)
 580   "If non-nil, a list of extensions \(strings\) to omit from Dired listings.
 581 Defaults to elements of `completion-ignored-extensions',
 582 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions', and
 583 `dired-texinfo-unclean-extensions'.
 584
 585 See interactive function `dired-omit-mode' \(\\[dired-omit-mode]\) and
 586 variables `dired-omit-mode' and `dired-omit-files'.")
 587
 588 (defun dired-omit-expunge (&optional regexp)
 589   "Erases all unmarked files matching REGEXP.
 590 Does nothing if global variable `dired-omit-mode' is nil, or if called
 591   non-interactively and buffer is bigger than `dired-omit-size-limit'.
 592 If REGEXP is nil or not specified, uses `dired-omit-files', and also omits
 593   filenames ending in `dired-omit-extensions'.
 594 If REGEXP is the empty string, this function is a no-op.
 595
 596 This functions works by temporarily binding `dired-marker-char' to
 597 `dired-omit-marker-char' and calling `dired-do-kill-lines'."
 598   (interactive "sOmit files (regexp): ")
 599   (if (and dired-omit-mode
 600            (or (interactive-p)
 601                (not dired-omit-size-limit)
 602                (< (buffer-size) dired-omit-size-limit)
 603                (progn
 604                  (message "Not omitting: directory larger than %d characters."
 605                           dired-omit-size-limit)
 606                  (setq dired-omit-mode nil)
 607                  nil)))
 608       (let ((omit-re (or regexp (dired-omit-regexp)))
 609             (old-modified-p (buffer-modified-p))
 610             count)
 611         (or (string= omit-re "")
 612             (let ((dired-marker-char dired-omit-marker-char))
 613               (message "Omitting...")
 614               (if (dired-mark-unmarked-files omit-re nil nil dired-omit-localp)
 615                   (progn
 616                     (setq count (dired-do-kill-lines nil "Omitted %d line%s."))
 617                     (force-mode-line-update))
 618                 (message "(Nothing to omit)"))))
 619         ;; Try to preserve modified state of buffer.  So `%*' doesn't appear
 620         ;; in mode-line of omitted buffers.
 621         (set-buffer-modified-p (and old-modified-p
 622                                     (save-excursion
 623                                       (goto-char (point-min))
 624                                       (re-search-forward dired-re-mark nil t))))
 625         count)))
 626
 627 (defun dired-omit-regexp ()
 628   (concat (if dired-omit-files (concat "\\(" dired-omit-files "\\)") "")
 629           (if (and dired-omit-files dired-omit-extensions) "\\|" "")
 630           (if dired-omit-extensions
 631               (concat ".";; a non-extension part should exist
 632                       "\\("
 633                       (mapconcat 'regexp-quote dired-omit-extensions "\\|")
 634                       "\\)$")
 635             "")))
 636
 637 ;; Returns t if any work was done, nil otherwise.
 638 (defun dired-mark-unmarked-files (regexp msg &optional unflag-p localp)
 639   "Mark unmarked files matching REGEXP, displaying MSG.
 640 REGEXP is matched against the entire file name.
 641 Does not re-mark files which already have a mark.
 642 With prefix argument, unflag all those files.
 643 Optional fourth argument LOCALP is as in `dired-get-filename'."
 644   (interactive "P")
 645   (let ((dired-marker-char (if unflag-p ?\s dired-marker-char)))
 646     (dired-mark-if
 647      (and
 648       ;; not already marked
 649       (looking-at " ")
 650       ;; uninteresting
 651       (let ((fn (dired-get-filename localp t)))
 652         (and fn (string-match regexp fn))))
 653      msg)))
 654
 655 ;;; REDEFINE.
 656 (defun dired-omit-new-add-entry (filename &optional marker-char relative)
 657   ;; This redefines dired-aux.el's dired-add-entry to avoid calling ls for
 658   ;; files that are going to be omitted anyway.
 659   (if dired-omit-mode
 660       ;; perhaps return t without calling ls
 661       (let ((omit-re (dired-omit-regexp)))
 662         (if (or (string= omit-re "")
 663                 (not
 664                  (string-match omit-re
 665                                (cond
 666                                 ((eq 'no-dir dired-omit-localp)
 667                                  filename)
 668                                 ((eq t dired-omit-localp)
 669                                  (dired-make-relative filename))
 670                                 (t
 671                                  (dired-make-absolute
 672                                   filename
 673                                   (file-name-directory filename)))))))
 674             ;; if it didn't match, go ahead and add the entry
 675             (dired-omit-old-add-entry filename marker-char relative)
 676           ;; dired-add-entry returns t for success, perhaps we should
 677           ;; return file-exists-p
 678           t))
 679     ;; omitting is not turned on at all
 680     (dired-omit-old-add-entry filename marker-char relative)))
 681
 682 ;;; REDEFINE.
 683 ;;; Redefine dired-aux.el's version of `dired-add-entry'
 684 ;;; Save old defun if not already done:
 685 (or (fboundp 'dired-omit-old-add-entry)
 686     (fset 'dired-omit-old-add-entry (symbol-function 'dired-add-entry)))
 687 ;; Redefine it.
 688 (fset 'dired-add-entry 'dired-omit-new-add-entry)
 689
 690 \f
 691 ;;; VIRTUAL DIRED MODE.
 692
 693 ;;; For browsing `ls -lR' listings in a dired-like fashion.
 694
 695 (defalias 'virtual-dired 'dired-virtual)
 696 (defun dired-virtual (dirname &optional switches)
 697   "Put this buffer into Virtual Dired mode.
 698
 699 In Virtual Dired mode, all commands that do not actually consult the
 700 filesystem will work.
 701
 702 This is useful if you want to peruse and move around in an ls -lR
 703 output file, for example one you got from an ftp server.  With
 704 ange-ftp, you can even dired a directory containing an ls-lR file,
 705 visit that file and turn on virtual dired mode.  But don't try to save
 706 this file, as dired-virtual indents the listing and thus changes the
 707 buffer.
 708
 709 If you have save a Dired buffer in a file you can use \\[dired-virtual] to
 710 resume it in a later session.
 711
 712 Type \\<dired-mode-map>\\[revert-buffer] \
 713 in the Virtual Dired buffer and answer `y' to convert
 714 the virtual to a real dired buffer again.  You don't have to do this, though:
 715 you can relist single subdirs using \\[dired-do-redisplay]."
 716
 717   ;; DIRNAME is the top level directory of the buffer.  It will become
 718   ;; its `default-directory'.  If nil, the old value of
 719   ;; default-directory is used.
 720
 721   ;; Optional SWITCHES are the ls switches to use.
 722
 723   ;; Shell wildcards will be used if there already is a `wildcard'
 724   ;; line in the buffer (thus it is a saved Dired buffer), but there
 725   ;; is no other way to get wildcards.  Insert a `wildcard' line by
 726   ;; hand if you want them.
 727
 728   (interactive
 729    (list (read-string "Virtual Dired directory: " (dired-virtual-guess-dir))))
 730   (goto-char (point-min))
 731   (or (looking-at "  ")
 732       ;; if not already indented, do it now:
 733       (indent-region (point-min) (point-max) 2))
 734   (or dirname (setq dirname default-directory))
 735   (setq dirname (expand-file-name (file-name-as-directory dirname)))
 736   (setq default-directory dirname)      ; contains no wildcards
 737   (let ((wildcard (save-excursion
 738                     (goto-char (point-min))
 739                     (forward-line 1)
 740                     (and (looking-at "^  wildcard ")
 741                          (buffer-substring (match-end 0)
 742                                            (progn (end-of-line) (point)))))))
 743   (if wildcard
 744         (setq dirname (expand-file-name wildcard default-directory))))
 745   ;; If raw ls listing (not a saved old dired buffer), give it a
 746   ;; decent subdir headerline:
 747   (goto-char (point-min))
 748   (or (looking-at dired-subdir-regexp)
 749       (insert "  "
 750               (directory-file-name (file-name-directory default-directory))
 751               ":\n"))
 752   (dired-mode dirname (or switches dired-listing-switches))
 753   (setq mode-name "Virtual Dired"
 754         revert-buffer-function 'dired-virtual-revert)
 755   (set (make-local-variable 'dired-subdir-alist) nil)
 756   (dired-build-subdir-alist)
 757   (goto-char (point-min))
 758   (dired-initial-position dirname))
 759
 760 (defun dired-virtual-guess-dir ()
 761   "Guess and return appropriate working directory of this buffer.
 762 The buffer is assumed to be in Dired or ls -lR format.  The guess is
 763 based upon buffer contents.  If nothing could be guessed, returns
 764 nil."
 765
 766   (let ((regexp "^\\(  \\)?\\([^ \n\r]*\\)\\(:\\)[\n\r]")
 767         (subexpr 2))
 768     (goto-char (point-min))
 769     (cond ((looking-at regexp)
 770            ;; If a saved dired buffer, look to which dir and
 771            ;; perhaps wildcard it belongs:
 772            (let ((dir (buffer-substring (match-beginning subexpr)
 773                                         (match-end subexpr))))
 774              (file-name-as-directory dir)))
 775           ;; Else no match for headerline found.  It's a raw ls listing.
 776           ;; In raw ls listings the directory does not have a headerline
 777           ;; try parent of first subdir, if any
 778           ((re-search-forward regexp nil t)
 779            (file-name-directory
 780             (directory-file-name
 781              (file-name-as-directory
 782               (buffer-substring (match-beginning subexpr)
 783                                 (match-end subexpr))))))
 784           (t                            ; if all else fails
 785            nil))))
 786
 787
 788 (defun dired-virtual-revert (&optional arg noconfirm)
 789   (if (not
 790        (y-or-n-p "Cannot revert a Virtual Dired buffer - switch to Real Dired mode? "))
 791       (error "Cannot revert a Virtual Dired buffer")
 792     (setq mode-name "Dired"
 793           revert-buffer-function 'dired-revert)
 794     (revert-buffer)))
 795
 796 ;; A zero-arg version of dired-virtual.
 797 (defun dired-virtual-mode ()
 798   "Put current buffer into Virtual Dired mode (see `dired-virtual').
 799 Useful on `magic-mode-alist' with the regexp
 800
 801   \"^  \\\\(/[^ /]+\\\\)+/?:$\"
 802
 803 to put saved dired buffers automatically into Virtual Dired mode.
 804
 805 Also useful for `auto-mode-alist' like this:
 806
 807   (add-to-list 'auto-mode-alist
 808                '(\"[^/]\\\\.dired\\\\'\" . dired-virtual-mode))"
 809   (interactive)
 810   (dired-virtual (dired-virtual-guess-dir)))
 811
 812 \f
 813 ;;; SMART SHELL.
 814
 815 ;;; An Emacs buffer can have but one working directory, stored in the
 816 ;;; buffer-local variable `default-directory'.  A Dired buffer may have
 817 ;;; several subdirectories inserted, but still has but one working directory:
 818 ;;; that of the top level Dired directory in that buffer.  For some commands
 819 ;;; it is appropriate that they use the current Dired directory instead of
 820 ;;; `default-directory', e.g., `find-file' and `compile'.  This is a general
 821 ;;; mechanism is provided for special handling of the working directory in
 822 ;;; special major modes.
 823
 824 ;; It's easier to add to this alist than redefine function
 825 ;; default-directory while keeping the old information.
 826 (defconst default-directory-alist
 827   '((dired-mode . (if (fboundp 'dired-current-directory)
 828                       (dired-current-directory)
 829                     default-directory)))
 830   "Alist of major modes and their opinion on `default-directory'.
 831 This is given as a Lisp expression to evaluate.  A resulting value of
 832 nil is ignored in favor of `default-directory'.")
 833
 834 (defun dired-default-directory ()
 835   "Usage like variable `default-directory'.
 836 Knows about the special cases in variable `default-directory-alist'."
 837   (or (eval (cdr (assq major-mode default-directory-alist)))
 838       default-directory))
 839
 840 (defun dired-smart-shell-command (cmd &optional insert)
 841   "Like function `shell-command', but in the current Virtual Dired directory."
 842   (interactive (list (read-from-minibuffer "Shell command: "
 843                                            nil nil nil 'shell-command-history)
 844                      current-prefix-arg))
 845   (let ((default-directory (dired-default-directory)))
 846     (shell-command cmd insert)))
 847
 848 \f
 849 ;;; LOCAL VARIABLES FOR DIRED BUFFERS.
 850
 851 ;;; Brief Description:
 852 ;;;
 853 ;;; * `dired-extra-startup' is part of the `dired-mode-hook'.
 854 ;;;
 855 ;;; * `dired-extra-startup' calls `dired-hack-local-variables'
 856 ;;;
 857 ;;; * `dired-hack-local-variables' checks the value of
 858 ;;;   `dired-local-variables-file'
 859 ;;;
 860 ;;; * Check if `dired-local-variables-file' is a non-nil string and is a
 861 ;;;   filename found in the directory of the Dired Buffer being created.
 862 ;;;
 863 ;;; * If `dired-local-variables-file' satisfies the above, then temporarily
 864 ;;;   include it in the Dired Buffer at the bottom.
 865 ;;;
 866 ;;; * Set `enable-local-variables' temporarily to the user variable
 867 ;;;   `dired-enable-local-variables' and run `hack-local-variables' on the
 868 ;;;   Dired Buffer.
 869
 870 (defvar dired-local-variables-file (convert-standard-filename ".dired")
 871   "Filename, as string, containing local dired buffer variables to be hacked.
 872 If this file found in current directory, then it will be inserted into dired
 873 buffer and `hack-local-variables' will be run.  See Info node
 874 `(emacs)File Variables' for more information on local variables.
 875 See also `dired-enable-local-variables'.")
 876
 877 (defun dired-hack-local-variables ()
 878   "Evaluate local variables in `dired-local-variables-file' for dired buffer."
 879   (if (and dired-local-variables-file
 880            (stringp dired-local-variables-file)
 881            (file-exists-p dired-local-variables-file))
 882       (let ((opoint (point-max))
 883             buffer-read-only
 884             ;; In case user has `enable-local-variables' set to nil we
 885             ;; override it locally with dired's variable.
 886             (enable-local-variables dired-enable-local-variables))
 887         ;; Insert 'em.
 888         (save-excursion
 889           (goto-char opoint)
 890           (insert "\^L\n")
 891           (insert-file-contents dired-local-variables-file))
 892         ;; Hack 'em.
 893         (let ((buffer-file-name dired-local-variables-file))
 894           (hack-local-variables))
 895         ;; Make sure that the modeline shows the proper information.
 896         (dired-sort-set-modeline)
 897         ;; Delete this stuff: `eobp' is used to find last subdir by dired.el.
 898         (delete-region opoint (point-max)))))
 899
 900 (defun dired-omit-here-always ()
 901   "Create `dired-local-variables-file' for omitting and reverts directory.
 902 Sets `dired-omit-mode' to t in a local variables file that is readable by
 903 dired."
 904   (interactive)
 905   (if (file-exists-p dired-local-variables-file)
 906       (message "File `./%s' already exists." dired-local-variables-file)
 907
 908     ;; Create `dired-local-variables-file'.
 909     (save-excursion
 910       (set-buffer (get-buffer-create " *dot-dired*"))
 911       (erase-buffer)
 912       (insert "Local Variables:\ndired-omit-mode: t\nEnd:\n")
 913       (write-file dired-local-variables-file)
 914       (kill-buffer (current-buffer)))
 915
 916     ;; Run extra-hooks and revert directory.
 917     (dired-extra-startup)
 918     (dired-revert)))
 919
 920 \f
 921 ;;; GUESS SHELL COMMAND.
 922
 923 ;;; Brief Description:
 924 ;;;
 925 ;;; `dired-do-shell-command' is bound to `!' by dired.el.
 926 ;;;
 927 ;;; * Redefine `dired-do-shell-command' so it calls
 928 ;;;   `dired-guess-shell-command'.
 929 ;;;
 930 ;;; * `dired-guess-shell-command' calls `dired-guess-default' with list of
 931 ;;;    marked files.
 932 ;;;
 933 ;;; * Parse `dired-guess-shell-alist-user' and
 934 ;;;   `dired-guess-shell-alist-default' (in that order) for the first REGEXP
 935 ;;;   that matches the first file in the file list.
 936 ;;;
 937 ;;; * If the REGEXP matches all the entries of the file list then evaluate
 938 ;;;   COMMAND, which is either a string or a Lisp expression returning a
 939 ;;;   string.  COMMAND may be a list of commands.
 940 ;;;
 941 ;;; * Return this command to `dired-guess-shell-command' which prompts user
 942 ;;;   with it.  The list of commands is temporarily put into the history list.
 943 ;;;   If a command is used successfully then it is stored permanently in
 944 ;;;   `dired-shell-command-history'.
 945
 946 ;;; Guess what shell command to apply to a file.
 947 (defvar dired-shell-command-history nil
 948   "History list for commands that read dired-shell commands.")
 949
 950 ;;; Default list of shell commands.
 951
 952 ;;; NOTE: Use `gunzip -c' instead of `zcat' on `.gz' files.  Some do not
 953 ;;; install GNU zip's version of zcat.
 954
 955 (defvar dired-guess-shell-alist-default
 956   (list
 957    (list "\\.tar$"
 958          '(if dired-guess-shell-gnutar
 959               (concat dired-guess-shell-gnutar " xvf")
 960             "tar xvf")
 961          ;; Extract files into a separate subdirectory
 962          '(if dired-guess-shell-gnutar
 963               (concat "mkdir " (file-name-sans-extension file)
 964                       "; " dired-guess-shell-gnutar " -C "
 965                       (file-name-sans-extension file) " -xvf")
 966             (concat "mkdir " (file-name-sans-extension file)
 967                     "; tar -C " (file-name-sans-extension file) " -xvf"))
 968          ;; List archive contents.
 969          '(if dired-guess-shell-gnutar
 970               (concat dired-guess-shell-gnutar " tvf")
 971             "tar tvf"))
 972
 973    ;; REGEXPS for compressed archives must come before the .Z rule to
 974    ;; be recognized:
 975    (list "\\.tar\\.Z$"
 976          ;; Untar it.
 977          '(if dired-guess-shell-gnutar
 978               (concat dired-guess-shell-gnutar " zxvf")
 979             (concat "zcat * | tar xvf -"))
 980          ;; Optional conversion to gzip format.
 981          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 982                   " " dired-guess-shell-znew-switches))
 983
 984    ;; gzip'ed archives
 985    (list "\\.t\\(ar\\.\\)?gz$"
 986          '(if dired-guess-shell-gnutar
 987               (concat dired-guess-shell-gnutar " zxvf")
 988             (concat "gunzip -qc * | tar xvf -"))
 989          ;; Extract files into a separate subdirectory
 990          '(if dired-guess-shell-gnutar
 991               (concat "mkdir " (file-name-sans-extension file)
 992                       "; " dired-guess-shell-gnutar " -C "
 993                       (file-name-sans-extension file) " -zxvf")
 994             (concat "mkdir " (file-name-sans-extension file)
 995                     "; gunzip -qc * | tar -C "
 996                     (file-name-sans-extension file) " -xvf -"))
 997          ;; Optional decompression.
 998          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q" ""))
 999          ;; List archive contents.
1000          '(if dired-guess-shell-gnutar
1001               (concat dired-guess-shell-gnutar " ztvf")
1002             (concat "gunzip -qc * | tar tvf -")))
1003
1004    ;; bzip2'ed archives
1005    (list "\\.t\\(ar\\.bz2\\|bz\\)$"
1006          "bunzip2 -c * | tar xvf -"
1007          ;; Extract files into a separate subdirectory
1008          '(concat "mkdir " (file-name-sans-extension file)
1009                   "; bunzip2 -c * | tar -C "
1010                   (file-name-sans-extension file) " -xvf -")
1011          ;; Optional decompression.
1012          "bunzip2")
1013
1014    '("\\.shar\\.Z$" "zcat * | unshar")
1015    '("\\.shar\\.g?z$" "gunzip -qc * | unshar")
1016
1017    '("\\.e?ps$" "ghostview" "xloadimage" "lpr")
1018    (list "\\.e?ps\\.g?z$" "gunzip -qc * | ghostview -"
1019          ;; Optional decompression.
1020          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1021    (list "\\.e?ps\\.Z$" "zcat * | ghostview -"
1022          ;; Optional conversion to gzip format.
1023          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1024                   " " dired-guess-shell-znew-switches))
1025
1026    '("\\.patch$" "cat * | patch")
1027    (list "\\.patch\\.g?z$" "gunzip -qc * | patch"
1028          ;; Optional decompression.
1029          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1030    (list "\\.patch\\.Z$" "zcat * | patch"
1031          ;; Optional conversion to gzip format.
1032          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1033                   " " dired-guess-shell-znew-switches))
1034
1035    ;; The following four extensions are useful with dired-man ("N" key)
1036    (list "\\.\\(?:[0-9]\\|man\\)$" '(progn (require 'man)
1037                                            (if (Man-support-local-filenames)
1038                                                "man -l"
1039                                              "cat * | tbl | nroff -man -h")))
1040    (list "\\.\\(?:[0-9]\\|man\\)\\.g?z$" '(progn (require 'man)
1041                                                  (if (Man-support-local-filenames)
1042                                                      "man -l"
1043                                                    "gunzip -qc * | tbl | nroff -man -h"))
1044          ;; Optional decompression.
1045          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1046    (list "\\.[0-9]\\.Z$" '(progn (require 'man)
1047                                  (if (Man-support-local-filenames)
1048                                      "man -l"
1049                                    "zcat * | tbl | nroff -man -h"))
1050          ;; Optional conversion to gzip format.
1051          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1052                   " " dired-guess-shell-znew-switches))
1053    '("\\.pod$" "perldoc" "pod2man * | nroff -man")
1054
1055    '("\\.dvi$" "xdvi" "dvips")          ; preview and printing
1056    '("\\.au$" "play")                   ; play Sun audiofiles
1057    '("\\.mpe?g$\\|\\.avi$" "xine -p")
1058    '("\\.wav$" "play")
1059    '("\\.uu$" "uudecode")               ; for uudecoded files
1060    '("\\.hqx$" "mcvert")
1061    '("\\.sh$" "sh")                     ; execute shell scripts
1062    '("\\.xbm$" "bitmap")                ; view X11 bitmaps
1063    '("\\.gp$" "gnuplot")
1064    '("\\.p[bgpn]m$" "xloadimage")
1065    '("\\.gif$" "xloadimage")            ; view gif pictures
1066    '("\\.tif$" "xloadimage")
1067    '("\\.png$" "display")               ; xloadimage 4.1 doesn't grok PNG
1068    '("\\.jpe?g$" "xloadimage")
1069    '("\\.fig$" "xfig")                  ; edit fig pictures
1070    '("\\.out$" "xgraph")                ; for plotting purposes.
1071    '("\\.tex$" "latex" "tex")
1072    '("\\.texi\\(nfo\\)?$" "makeinfo" "texi2dvi")
1073    '("\\.pdf$" "xpdf")
1074    '("\\.doc$" "antiword" "strings")
1075    '("\\.rpm$" "rpm -qilp" "rpm -ivh")
1076    '("\\.dia$" "dia")
1077    '("\\.mgp$" "mgp")
1078
1079    ;; Some other popular archivers.
1080    (list "\\.zip$" "unzip" "unzip -l"
1081          ;; Extract files into a separate subdirectory
1082          '(concat "unzip" (if dired-guess-shell-gzip-quiet " -q")
1083                   " -d " (file-name-sans-extension file)))
1084    '("\\.zoo$" "zoo x//")
1085    '("\\.lzh$" "lharc x")
1086    '("\\.arc$" "arc x")
1087    '("\\.shar$" "unshar")
1088
1089    ;; Compression.
1090    (list "\\.g?z$" '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1091    (list "\\.dz$" "dictunzip")
1092    (list "\\.bz2$" "bunzip2")
1093    (list "\\.Z$" "uncompress"
1094          ;; Optional conversion to gzip format.
1095          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1096                   " " dired-guess-shell-znew-switches))
1097
1098    '("\\.sign?$" "gpg --verify"))
1099
1100   "Default alist used for shell command guessing.
1101 See `dired-guess-shell-alist-user'.")
1102
1103 (defcustom dired-guess-shell-alist-user nil
1104   "User-defined alist of rules for suggested commands.
1105 These rules take precedence over the predefined rules in the variable
1106 `dired-guess-shell-alist-default' (to which they are prepended).
1107
1108 Each element of this list looks like
1109
1110     \(REGEXP COMMAND...\)
1111
1112 where each COMMAND can either be a string or a Lisp expression that evaluates
1113 to a string.  If several COMMANDs are given, the first one will be the default
1114 and the rest will be added temporarily to the history and can be retrieved
1115 with \\[previous-history-element] (M-p) .
1116
1117 You can set this variable in your ~/.emacs.  For example, to add rules for
1118 `.foo' and `.bar' files, write
1119
1120  \(setq dired-guess-shell-alist-user
1121        (list (list \"\\\\.foo\\\\'\" \"FOO-COMMAND\");; fixed rule
1122               ;; possibly more rules ...
1123               (list \"\\\\.bar\\\'\";; rule with condition test
1124                     '(if condition
1125                           \"BAR-COMMAND-1\"
1126                         \"BAR-COMMAND-2\")))\)"
1127   :group 'dired-x
1128   :type '(alist :key-type regexp :value-type (repeat sexp)))
1129
1130 (defcustom dired-guess-shell-case-fold-search t
1131   "If non-nil, `dired-guess-shell-alist-default' and
1132 `dired-guess-shell-alist-user' are matched case-insensitively."
1133   :group 'dired-x
1134   :type 'boolean)
1135
1136 (defun dired-guess-default (files)
1137   "Guess a shell commands for FILES.  Return command or list of commands.
1138 See `dired-guess-shell-alist-user'."
1139
1140   (let* ((case-fold-search dired-guess-shell-case-fold-search)
1141          ;; Prepend the user's alist to the default alist.
1142          (alist (append dired-guess-shell-alist-user
1143                         dired-guess-shell-alist-default))
1144          (file (car files))
1145          (flist (cdr files))
1146          elt regexp cmds)
1147
1148     ;; Find the first match in the alist for first file in FILES.
1149     (while alist
1150       (setq elt (car alist)
1151             regexp (car elt)
1152             alist (cdr alist))
1153       (if (string-match regexp file)
1154           (setq cmds (cdr elt)
1155                 alist nil)))
1156
1157     ;; If more than one file, see if all of FILES match regular expression.
1158     (while (and flist
1159                 (string-match regexp (car flist)))
1160       (setq flist (cdr flist)))
1161
1162     ;; If flist is still non-nil, then do not guess since this means that not
1163     ;; all the files in FILES were matched by the regexp.
1164     (setq cmds (and (not flist) cmds))
1165
1166     ;; Return commands or nil if flist is still non-nil.
1167     ;; Evaluate the commands in order that any logical testing will be done.
1168     (cond ((not (cdr cmds))
1169            (eval (car cmds))) ; single command
1170           (t
1171            (mapcar (function eval) cmds)))))
1172
1173 (defun dired-guess-shell-command (prompt files)
1174   "Ask user with PROMPT for a shell command, guessing a default from FILES."
1175
1176   (let ((default (dired-guess-default files))
1177         default-list old-history val (failed t))
1178
1179     (if (null default)
1180         ;; Nothing to guess
1181         (read-from-minibuffer prompt nil nil nil 'dired-shell-command-history)
1182
1183       ;; Save current history list
1184       (setq old-history dired-shell-command-history)
1185
1186       (if (listp default)
1187
1188           ;; More than one guess
1189           (setq default-list default
1190                 default (car default)
1191                 prompt (concat
1192                         prompt
1193                         (format "{%d guesses} " (length default-list))))
1194
1195         ;; Just one guess
1196         (setq default-list (list default)))
1197
1198       ;; Push all guesses onto history so that they can be retrieved with M-p
1199       ;; and put the first guess in the prompt but not in the initial value.
1200       (setq dired-shell-command-history
1201             (append default-list dired-shell-command-history)
1202             prompt (concat prompt (format "[%s] " default)))
1203
1204       ;; The unwind-protect returns VAL, and we too.
1205       (unwind-protect
1206           ;; BODYFORM
1207           (progn
1208             (setq val (read-from-minibuffer prompt nil nil nil
1209                                             'dired-shell-command-history)
1210                   failed nil)
1211             ;; If we got a return, then use default.
1212             (if (equal val "")
1213                 (setq val default))
1214             val)
1215
1216         ;; UNWINDFORMS
1217         ;; Undo pushing onto the history list so that an aborted
1218         ;; command doesn't get the default in the next command.
1219         (setq dired-shell-command-history old-history)
1220         (if (not failed)
1221             (or (equal val (car-safe dired-shell-command-history))
1222                 (setq dired-shell-command-history
1223                       (cons val dired-shell-command-history))))))))
1224
1225
1226 ;;; REDEFINE.
1227 ;;; Redefine dired-aux.el's version:
1228 (defun dired-read-shell-command (prompt arg files)
1229   "Read a dired shell command prompting with PROMPT (using read-string).
1230 ARG is the prefix arg and may be used to indicate in the prompt which
1231   files are affected.
1232 This is an extra function so that you can redefine it."
1233   (dired-mark-pop-up
1234    nil 'shell files
1235    'dired-guess-shell-command
1236    (format prompt (dired-mark-prompt arg files)) ; PROMPT
1237    files))                                       ; FILES
1238
1239 \f
1240 ;;; RELATIVE SYMBOLIC LINKS.
1241
1242 (defvar dired-keep-marker-relsymlink ?S
1243   "See variable `dired-keep-marker-move'.")
1244
1245 (defun dired-make-relative-symlink (file1 file2 &optional ok-if-already-exists)
1246   "Make a symbolic link (pointing to FILE1) in FILE2.
1247 The link is relative (if possible), for example
1248
1249     \"/vol/tex/bin/foo\" \"/vol/local/bin/foo\"
1250
1251 results in
1252
1253     \"../../tex/bin/foo\" \"/vol/local/bin/foo\""
1254   (interactive "FRelSymLink: \nFRelSymLink %s: \np")
1255   (let (name1 name2 len1 len2 (index 0) sub)
1256     (setq file1 (expand-file-name file1)
1257           file2 (expand-file-name file2)
1258           len1 (length file1)
1259           len2 (length file2))
1260     ;; Find common initial file name components:
1261     (let (next)
1262       (while (and (setq next (string-match "/" file1 index))
1263                   (setq next (1+ next))
1264                   (< next (min len1 len2))
1265                   ;; For the comparison, both substrings must end in
1266                   ;; `/', so NEXT is *one plus* the result of the
1267                   ;; string-match.
1268                   ;; E.g., consider the case of linking "/tmp/a/abc"
1269                   ;; to "/tmp/abc" erroneously giving "/tmp/a" instead
1270                   ;; of "/tmp/" as common initial component
1271                   (string-equal (substring file1 0 next)
1272                                 (substring file2 0 next)))
1273         (setq index next))
1274       (setq name2 file2
1275             sub (substring file1 0 index)
1276             name1 (substring file1 index)))
1277     (if (string-equal sub "/")
1278         ;; No common initial file name found
1279         (setq name1 file1)
1280       ;; Else they have a common parent directory
1281       (let ((tem (substring file2 index))
1282             (start 0)
1283             (count 0))
1284         ;; Count number of slashes we must compensate for ...
1285         (while (setq start (string-match "/" tem start))
1286           (setq count (1+ count)
1287                 start (1+ start)))
1288         ;; ... and prepend a "../" for each slash found:
1289         (while (> count 0)
1290           (setq count (1- count)
1291                 name1 (concat "../" name1)))))
1292     (make-symbolic-link
1293      (directory-file-name name1)        ; must not link to foo/
1294                                         ; (trailing slash!)
1295      name2 ok-if-already-exists)))
1296
1297 ;;;###autoload
1298 (defun dired-do-relsymlink (&optional arg)
1299    "Relative symlink all marked (or next ARG) files into a directory.
1300 Otherwise make a relative symbolic link to the current file.
1301 This creates relative symbolic links like
1302
1303     foo -> ../bar/foo
1304
1305 not absolute ones like
1306
1307     foo -> /ugly/file/name/that/may/change/any/day/bar/foo
1308
1309 For absolute symlinks, use \\[dired-do-symlink]."
1310   (interactive "P")
1311   (dired-do-create-files 'relsymlink (function dired-make-relative-symlink)
1312                            "RelSymLink" arg dired-keep-marker-relsymlink))
1313
1314 (defun dired-do-relsymlink-regexp (regexp newname &optional arg whole-name)
1315   "RelSymlink all marked files containing REGEXP to NEWNAME.
1316 See functions `dired-do-rename-regexp' and `dired-do-relsymlink'
1317 for more info."
1318   (interactive (dired-mark-read-regexp "RelSymLink"))
1319   (dired-do-create-files-regexp
1320    (function dired-make-relative-symlink)
1321    "RelSymLink" arg regexp newname whole-name dired-keep-marker-relsymlink))
1322
1323 \f
1324 ;;; VISIT ALL MARKED FILES SIMULTANEOUSLY.
1325
1326 ;;; Brief Description:
1327 ;;;
1328 ;;; `dired-do-find-marked-files' is bound to `F' by dired-x.el.
1329 ;;;
1330 ;;; * Use `dired-get-marked-files' to collect the marked files in the current
1331 ;;;   Dired Buffer into a list of filenames `FILE-LIST'.
1332 ;;;
1333 ;;; * Pass FILE-LIST to `dired-simultaneous-find-file' all with
1334 ;;;   `dired-do-find-marked-files''s prefix argument NOSELECT.
1335 ;;;
1336 ;;; * `dired-simultaneous-find-file' runs through FILE-LIST decrementing the
1337 ;;;   list each time.
1338 ;;;
1339 ;;; * If NOSELECT is non-nil then just run `find-file-noselect'  on each
1340 ;;;   element of FILE-LIST.
1341 ;;;
1342 ;;; * If NOSELECT is nil then calculate the `size' of the window for each file
1343 ;;;   by dividing the `window-height' by length of FILE-LIST.  Thus, `size' is
1344 ;;;   cognizant of the window-configuration.
1345 ;;;
1346 ;;; * If `size' is too small abort, otherwise run `find-file' on each element
1347 ;;;   of FILE-LIST giving each a window of height `size'.
1348
1349 (defun dired-do-find-marked-files (&optional noselect)
1350   "Find all marked files displaying all of them simultaneously.
1351 With optional NOSELECT just find files but do not select them.
1352
1353 The current window is split across all files marked, as evenly as possible.
1354 Remaining lines go to bottom-most window.  The number of files that can be
1355 displayed this way is restricted by the height of the current window and
1356 `window-min-height'.
1357
1358 To keep dired buffer displayed, type \\[split-window-vertically] first.
1359 To display just marked files, type \\[delete-other-windows] first."
1360
1361   (interactive "P")
1362   (dired-simultaneous-find-file (dired-get-marked-files) noselect))
1363
1364 (defun dired-simultaneous-find-file (file-list noselect)
1365
1366   "Visit all files in FILE-LIST and display them simultaneously.
1367 The current window is split across all files in FILE-LIST, as evenly as
1368 possible.  Remaining lines go to the bottom-most window.  The number of
1369 files that can be displayed this way is restricted by the height of the
1370 current window and the variable `window-min-height'.  With non-nil
1371 NOSELECT the files are merely found but not selected."
1372
1373   ;; We don't make this function interactive because it is usually too clumsy
1374   ;; to specify FILE-LIST interactively unless via dired.
1375
1376   (let (size)
1377
1378     (if noselect
1379         ;; Do not select the buffer.
1380         (find-file-noselect (car file-list))
1381
1382       ;; We will have to select the buffer.  Calculate and check window size.
1383       (setq size (/ (window-height) (length file-list)))
1384       (or (<= window-min-height size)
1385           (error "Too many files to visit simultaneously.  Try C-u prefix"))
1386       (find-file (car file-list)))
1387
1388     ;; Decrement.
1389     (setq file-list (cdr file-list))
1390
1391     (while file-list
1392
1393       (if noselect
1394           ;; Do not select the buffer.
1395           (find-file-noselect (car file-list))
1396
1397         ;; Vertically split off a window of desired size.  Upper window will
1398         ;; have SIZE lines.  Select lower (larger) window.  We split it again.
1399         (select-window (split-window nil size))
1400         (find-file (car file-list)))
1401
1402       ;; Decrement.
1403       (setq file-list (cdr file-list)))))
1404
1405 \f
1406 ;;; MISCELLANEOUS COMMANDS.
1407
1408 ;;; Run man on files.
1409
1410 (defun dired-man ()
1411   "Run man on this file.  Display old buffer if buffer name matches filename.
1412 Uses `man.el' of \\[manual-entry] fame."
1413   (interactive)
1414   (require 'man)
1415   (let* ((file (dired-get-filename))
1416          (manual-program (replace-regexp-in-string "\\*" "%s"
1417                           (dired-guess-shell-command
1418                            "Man command: " (list file)))))
1419     (Man-getpage-in-background file)))
1420
1421 ;;; Run Info on files.
1422
1423 (defun dired-info ()
1424   "Run info on this file."
1425   (interactive)
1426   (info (dired-get-filename)))
1427
1428 ;;; Run mail on mail folders.
1429
1430 ;; Avoid compiler warning.
1431 (eval-when-compile
1432   (when (not (fboundp 'vm-visit-folder))
1433     (defun vm-visit-folder (file &optional arg)
1434       nil)))
1435
1436 (defun dired-vm (&optional read-only)
1437   "Run VM on this file.
1438 With prefix arg, visit folder read-only (this requires at least VM 5).
1439 See also variable `dired-vm-read-only-folders'."
1440   (interactive "P")
1441   (let ((dir (dired-current-directory))
1442         (fil (dired-get-filename)))
1443     ;; take care to supply 2nd arg only if requested - may still run VM 4!
1444     (cond (read-only (vm-visit-folder fil t))
1445           ((eq t dired-vm-read-only-folders) (vm-visit-folder fil t))
1446           ((null dired-vm-read-only-folders) (vm-visit-folder fil))
1447           (t (vm-visit-folder fil (not (file-writable-p fil)))))
1448     ;; so that pressing `v' inside VM does prompt within current directory:
1449     (set (make-local-variable 'vm-folder-directory) dir)))
1450
1451 (defun dired-rmail ()
1452   "Run RMAIL on this file."
1453   (interactive)
1454   (rmail (dired-get-filename)))
1455
1456 (defun dired-do-run-mail ()
1457   "If `dired-bind-vm' is t, then function `dired-vm', otherwise `dired-rmail'."
1458   (interactive)
1459   (if dired-bind-vm
1460       ;; Read mail folder using vm.
1461       (dired-vm)
1462     ;; Read mail folder using rmail.
1463     (dired-rmail)))
1464
1465 \f
1466 ;;; MISCELLANEOUS INTERNAL FUNCTIONS.
1467
1468 (or (fboundp 'dired-old-find-buffer-nocreate)
1469     (fset 'dired-old-find-buffer-nocreate
1470           (symbol-function 'dired-find-buffer-nocreate)))
1471
1472 ;;; REDEFINE.
1473 ;;; Redefines dired.el's version of `dired-find-buffer-nocreate'
1474 (defun dired-find-buffer-nocreate (dirname &optional mode)
1475   (if (and dired-find-subdir
1476            ;; don't try to find a wildcard as a subdirectory
1477            (string-equal dirname (file-name-directory dirname)))
1478       (let* ((cur-buf (current-buffer))
1479              (buffers (nreverse
1480                        (dired-buffers-for-dir (expand-file-name dirname))))
1481              (cur-buf-matches (and (memq cur-buf buffers)
1482                                    ;; wildcards must match, too:
1483                                    (equal dired-directory dirname))))
1484         ;; We don't want to switch to the same buffer---
1485         (setq buffers (delq cur-buf buffers));;need setq with delq
1486         (or (car (sort buffers (function dired-buffer-more-recently-used-p)))
1487             ;; ---unless it's the only possibility:
1488             (and cur-buf-matches cur-buf)))
1489     (dired-old-find-buffer-nocreate dirname mode)))
1490
1491 ;; This should be a builtin
1492 (defun dired-buffer-more-recently-used-p (buffer1 buffer2)
1493   "Return t if BUFFER1 is more recently used than BUFFER2."
1494   (if (equal buffer1 buffer2)
1495       nil
1496     (let ((more-recent nil)
1497           (list (buffer-list)))
1498       (while (and list
1499                   (not (setq more-recent (equal buffer1 (car list))))
1500                   (not (equal buffer2 (car list))))
1501         (setq list (cdr list)))
1502       more-recent)))
1503
1504 ;;; Same thing as `dired-buffers-for-dir' of dired.el? - lrd 11/23/93
1505 ;;; (defun dired-buffers-for-dir-exact (dir)
1506 ;;; ;; Return a list of buffers that dired DIR (a directory or wildcard)
1507 ;;; ;; at top level, or as subdirectory.
1508 ;;; ;; Top level matches must match the wildcard part too, if any.
1509 ;;; ;; The list is in reverse order of buffer creation, most recent last.
1510 ;;; ;; As a side effect, killed dired buffers for DIR are removed from
1511 ;;; ;; dired-buffers.
1512 ;;;   (let ((alist dired-buffers) result elt)
1513 ;;;     (while alist
1514 ;;;       (setq elt (car alist)
1515 ;;;             alist (cdr alist))
1516 ;;;       (let ((buf (cdr elt)))
1517 ;;;         (if (buffer-name buf)
1518 ;;;             ;; Top level must match exactly against dired-directory in
1519 ;;;             ;; case one of them is a wildcard.
1520 ;;;             (if (or (equal dir (save-excursion (set-buffer buf)
1521 ;;;                                                dired-directory))
1522 ;;;                     (assoc dir (save-excursion (set-buffer buf)
1523 ;;;                                                dired-subdir-alist)))
1524 ;;;                 (setq result (cons buf result)))
1525 ;;;           ;; else buffer is killed - clean up:
1526 ;;;           (setq dired-buffers (delq elt dired-buffers)))))
1527 ;;;     result))
1528
1529 ;;; REDEFINE.
1530 ;;; Redefines dired.el's version of `dired-initial-position'
1531 (defun dired-initial-position (dirname)
1532   "Where point should go in a new listing of DIRNAME.
1533 Point assumed at beginning of new subdir line.
1534 You may redefine this function as you wish, e.g. like in `dired-x.el'."
1535   (end-of-line)
1536   (if dired-find-subdir (dired-goto-subdir dirname)) ; new
1537   (if dired-trivial-filenames (dired-goto-next-nontrivial-file)))
1538
1539 \f
1540 ;; Does anyone use this? - lrd 6/29/93.
1541 ;; Apparently people do use it. - lrd 12/22/97.
1542 (defun dired-mark-sexp (predicate &optional unflag-p)
1543   "Mark files for which PREDICATE returns non-nil.
1544 With a prefix arg, unflag those files instead.
1545
1546 PREDICATE is a lisp expression that can refer to the following symbols:
1547
1548     inode  [integer] the inode of the file (only for ls -i output)
1549     s      [integer] the size of the file for ls -s output
1550                      (usually in blocks or, with -k, in KByte)
1551     mode   [string]  file permission bits, e.g. \"-rw-r--r--\"
1552     nlink  [integer] number of links to file
1553     uid    [string]  owner
1554     gid    [string]  group  (If the gid is not displayed by ls,
1555                      this will still be set (to the same as uid))
1556     size   [integer] file size in bytes
1557     time   [string]  the time that ls displays, e.g. \"Feb 12 14:17\"
1558     name   [string]  the name of the file
1559     sym    [string]  if file is a symbolic link, the linked-to name, else \"\"
1560
1561 For example, use
1562
1563         (equal 0 size)
1564
1565 to mark all zero length files."
1566   ;; Using sym="" instead of nil avoids the trap of
1567   ;; (string-match "foo" sym) into which a user would soon fall.
1568   ;; Give `equal' instead of `=' in the example, as this works on
1569   ;; integers and strings.
1570   (interactive "xMark if (lisp expr): \nP")
1571   (message "%s" predicate)
1572   (let ((dired-marker-char (if unflag-p ?\040 dired-marker-char))
1573         inode s mode nlink uid gid size time name sym)
1574     (dired-mark-if
1575      (save-excursion
1576        (and
1577         ;; Sets vars
1578         ;;                inode s mode nlink uid gid size time name sym
1579
1580         ;; according to current file line.  Returns t for success, nil if
1581         ;; there is no file line.  Upon success, all variables are set, either
1582         ;; to nil or the appropriate value, so they need not be initialized.
1583         ;; Moves point within the current line.
1584         (if (dired-move-to-filename)
1585             (let (pos
1586                   (mode-len 10) ; length of mode string
1587                   ;; like in dired.el, but with subexpressions \1=inode, \2=s:
1588                   (dired-re-inode-size "\\s *\\([0-9]*\\)\\s *\\([0-9]*\\) ?"))
1589               (beginning-of-line)
1590               (forward-char 2)
1591               (if (looking-at dired-re-inode-size)
1592                   (progn
1593                     (goto-char (match-end 0))
1594                     (setq inode (string-to-number (buffer-substring (match-beginning 1)
1595                                                                     (match-end 1)))
1596                           s (string-to-number (buffer-substring (match-beginning 2)
1597                                                                 (match-end 2)))))
1598                 (setq inode nil
1599                       s nil))
1600               (setq mode (buffer-substring (point) (+ mode-len (point))))
1601               (forward-char mode-len)
1602               (setq nlink (read (current-buffer)))
1603               ;; Karsten Wenger <kw@cis.uni-muenchen.de> fixed uid.
1604               (setq uid (buffer-substring (+ (point) 1)
1605                                           (progn (forward-word 1) (point))))
1606               (re-search-forward directory-listing-before-filename-regexp)
1607               (goto-char (match-beginning 1))
1608               (forward-char -1)
1609               (setq size (string-to-number (buffer-substring (save-excursion
1610                                                                (backward-word 1)
1611                                                                (setq pos (point)))
1612                                                              (point))))
1613               (goto-char pos)
1614               (backward-word 1)
1615               ;; if no gid is displayed, gid will be set to uid
1616               ;; but user will then not reference it anyway in PREDICATE.
1617               (setq gid (buffer-substring (save-excursion
1618                                             (forward-word 1) (point))
1619                                           (point))
1620                     time (buffer-substring (match-beginning 1)
1621                                            (1- (dired-move-to-filename)))
1622                     name (buffer-substring (point)
1623                                            (or
1624                                             (dired-move-to-end-of-filename t)
1625                                             (point)))
1626                     sym  (progn
1627                            (if (looking-at " -> ")
1628                                (buffer-substring
1629                                 (progn (forward-char 4) (point))
1630                                 (progn (end-of-line) (point)))
1631                              "")))
1632               t)
1633           nil)
1634                       (eval predicate)))
1635      (format "'%s file" predicate))))
1636
1637 \f
1638 ;;; FIND FILE AT POINT.
1639
1640 (defvar dired-x-hands-off-my-keys t
1641   "*Non-nil means don't bind `dired-x-find-file' over `find-file' on keyboard.
1642 Similarly for `dired-x-find-file-other-window' over `find-file-other-window'.
1643 If you change this variable after `dired-x.el' is loaded then do
1644 \\[dired-x-bind-find-file].")
1645
1646 ;;; Bind `dired-x-find-file{-other-window}' over wherever
1647 ;;; `find-file{-other-window}' is bound?
1648 (defun dired-x-bind-find-file ()
1649   "Bind `dired-x-find-file' in place of `find-file' \(or reverse\).
1650 Similarly for `dired-x-find-file-other-window' and `find-file-other-window'.
1651 Binding direction based on `dired-x-hands-off-my-keys'.
1652 This function is part of `after-init-hook'."
1653   (interactive)
1654   (if (interactive-p)
1655       (setq dired-x-hands-off-my-keys
1656             (not (y-or-n-p "Bind dired-x-find-file over find-file? "))))
1657   (cond ((not dired-x-hands-off-my-keys)
1658          (substitute-key-definition 'find-file
1659                                     'dired-x-find-file
1660                                     (current-global-map))
1661          (substitute-key-definition 'find-file-other-window
1662                                     'dired-x-find-file-other-window
1663                                     (current-global-map)))
1664         (t
1665          (substitute-key-definition 'dired-x-find-file
1666                                     'find-file
1667                                     (current-global-map))
1668          (substitute-key-definition 'dired-x-find-file-other-window
1669                                     'find-file-other-window
1670                                     (current-global-map))))
1671   ;; Clear mini-buffer.
1672   (message nil))
1673
1674 ;;; Now call it so binding is correct and put on `after-init-hook' in case
1675 ;;; user changes binding.
1676 (dired-x-bind-find-file)
1677 (add-hook 'after-init-hook 'dired-x-bind-find-file)
1678
1679 (defun dired-x-find-file (filename)
1680   "Edit file FILENAME.
1681 May create a new window, or reuse an existing one.
1682 See the function `display-buffer'.
1683
1684 Identical to `find-file' except when called interactively, with a prefix arg
1685 \(e.g., \\[universal-argument]\), in which case it guesses filename near point.
1686 Useful for editing file mentioned in buffer you are viewing,
1687 or to test if that file exists.  Use minibuffer after snatching filename."
1688   (interactive (list (read-filename-at-point "Find file: ")))
1689   (find-file (expand-file-name filename)))
1690
1691 (defun dired-x-find-file-other-window (filename)
1692   "Edit file FILENAME, in another window.
1693 May create a new window, or reuse an existing one.
1694 See the function `display-buffer'.
1695
1696 Identical to `find-file-other-window' except when called interactively, with a
1697 prefix arg \(e.g., \\[universal-argument]\), in which case it guesses filename near point.
1698 Useful for editing file mentioned in buffer you are viewing,
1699 or to test if that file exists.  Use minibuffer after snatching filename."
1700   (interactive (list (read-filename-at-point "Find file: ")))
1701   (find-file-other-window (expand-file-name filename)))
1702
1703 ;;; Internal functions.
1704
1705 ;; Fixme: This should probably use `thing-at-point'.  -- fx
1706 (defun dired-filename-at-point ()
1707   "Get the filename closest to point, but do not change position.
1708 Has a preference for looking backward when not directly on a symbol.  Not
1709 perfect - point must be in middle of or end of filename."
1710
1711   (let ((filename-chars "-.[:alnum:]_/:$+@")
1712         start end filename prefix)
1713
1714     (save-excursion
1715       ;; First see if just past a filename.
1716       (if (not (eobp))
1717           (if (looking-at "[] \t\n[{}()]") ; whitespace or some parens
1718               (progn
1719                 (skip-chars-backward " \n\t\r({[]})")
1720                 (if (not (bobp))
1721                     (backward-char 1)))))
1722
1723       (if (string-match (concat "[" filename-chars "]")
1724                         (char-to-string (following-char)))
1725           (progn
1726             (if (re-search-backward (concat "[^" filename-chars "]") nil t)
1727                 (forward-char)
1728               (goto-char (point-min)))
1729             (setq start (point))
1730             (setq prefix
1731                   (and (string-match
1732                         "^\\w+@"
1733                         (buffer-substring start (line-beginning-position)))
1734                        "/"))
1735             (goto-char start)
1736             (if (string-match "[/~]" (char-to-string (preceding-char)))
1737                 (setq start (1- start)))
1738             (re-search-forward (concat "\\=[" filename-chars "]*") nil t))
1739
1740         (error "No file found around point!"))
1741
1742       ;; Return string.
1743       (expand-file-name (concat prefix (buffer-substring start (point)))))))
1744
1745 (defun read-filename-at-point (prompt)
1746   "Return filename prompting with PROMPT with completion.
1747 If `current-prefix-arg' is non-nil, uses name at point as guess."
1748   (if current-prefix-arg
1749       (let ((guess (dired-filename-at-point)))
1750         (read-file-name prompt
1751                         (file-name-directory guess)
1752                         guess
1753                         nil (file-name-nondirectory guess)))
1754     (read-file-name prompt default-directory)))
1755 \f
1756 ;;; BUG REPORTS
1757
1758 ;; Fixme: get rid of this later.
1759
1760 ;;; This section is provided for reports.  It uses Barry A. Warsaw's
1761 ;;; reporter.el which is bundled with GNU Emacs v19.
1762
1763 (defconst dired-x-help-address "bug-gnu-emacs@gnu.org"
1764   "Address(es) accepting submission of reports on dired-x.el.")
1765
1766 (defconst dired-x-variable-list
1767   (list
1768    'dired-bind-vm
1769    'dired-vm-read-only-folders
1770    'dired-bind-jump
1771    'dired-bind-info
1772    'dired-bind-man
1773    'dired-find-subdir
1774    'dired-enable-local-variables
1775    'dired-local-variables-file
1776    'dired-guess-shell-gnutar
1777    'dired-guess-shell-gzip-quiet
1778    'dired-guess-shell-znew-switches
1779    'dired-guess-shell-alist-user
1780    'dired-clean-up-buffers-too
1781    'dired-omit-mode
1782    'dired-omit-files
1783    'dired-omit-extensions
1784    )
1785   "List of variables to be appended to reports sent by `dired-x-submit-report'.")
1786
1787 (defun dired-x-submit-report ()
1788   "Submit via `reporter.el' a bug report on program.
1789 Send report on `dired-x-file' version `dired-x-version,' to
1790 `dired-x-maintainer' at address `dired-x-help-address' listing
1791 variables `dired-x-variable-list' in the message."
1792   (interactive)
1793
1794   (reporter-submit-bug-report
1795    dired-x-help-address                 ; address
1796    "dired-x"                            ; pkgname
1797    dired-x-variable-list                ; varlist
1798    nil nil                              ; pre-/post-hooks
1799    ""))
1800
1801 \f
1802 ;; As Barry Warsaw would say: "This might be useful..."
1803 (provide 'dired-x)
1804
1805 ;; arch-tag: 71a43ba2-7a00-4793-a028-0613dd7765ae
1806 ;;; dired-x.el ends here