1 ;;; desktop.el --- save partial status of Emacs when killed
3 ;; Copyright (C) 1993, 1994, 1995, 1997, 2000, 2001
4 ;; Free Software Foundation, Inc.
6 ;; Author: Morten Welinder <terra@diku.dk>
7 ;; Keywords: convenience
8 ;; Favourite-brand-of-beer: None, I hate beer.
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
29 ;; Save the Desktop, i.e.,
30 ;; - some global variables
31 ;; - the list of buffers with associated files. For each buffer also
33 ;; - the default directory
35 ;; - the mark & mark-active
37 ;; - some local variables
39 ;; To use this, first put these two lines in the bottom of your .emacs
40 ;; file (the later the better):
42 ;; (desktop-load-default)
45 ;; Between these two lines you may wish to add something that updates the
46 ;; variables `desktop-globals-to-save' and/or `desktop-locals-to-save'. If
47 ;; for instance you want to save the local variable `foobar' for every buffer
48 ;; in which it is local, you could add the line
50 ;; (setq desktop-locals-to-save (cons 'foobar desktop-locals-to-save))
52 ;; To avoid saving excessive amounts of data you may also wish to add
53 ;; something like the following
55 ;; (add-hook 'kill-emacs-hook
57 ;; (desktop-truncate search-ring 3)
58 ;; (desktop-truncate regexp-search-ring 3)))
60 ;; which will make sure that no more than three search items are saved. You
61 ;; must place this line *after* the `(desktop-load-default)' line. See also
62 ;; the variable `desktop-save-hook'.
64 ;; Start Emacs in the root directory of your "project". The desktop saver
65 ;; is inactive by default. You activate it by M-x desktop-save RET. When
66 ;; you exit the next time the above data will be saved. This ensures that
67 ;; all the files you were editing will be reloaded the next time you start
68 ;; Emacs from the same directory and that points will be set where you
69 ;; left them. If you save a desktop file in your home directory it will
70 ;; act as a default desktop when you start Emacs from a directory that
71 ;; doesn't have its own. I never do this, but you may want to.
73 ;; Some words on minor modes: Most minor modes are controlled by
74 ;; buffer-local variables, which have a standard save / restore
75 ;; mechanism. To handle all minor modes, we take the following
76 ;; approach: (1) check whether the variable name from
77 ;; `minor-mode-alist' is also a function; and (2) use translation
78 ;; table `desktop-minor-mode-table' in the case where the two names
81 ;; By the way: don't use desktop.el to customize Emacs -- the file .emacs
82 ;; in your home directory is used for that. Saving global default values
83 ;; for buffers is an example of misuse.
85 ;; PLEASE NOTE: The kill ring can be saved as specified by the variable
86 ;; `desktop-globals-to-save' (by default it isn't). This may result in saving
87 ;; things you did not mean to keep. Use M-x desktop-clear RET.
89 ;; Thanks to hetrick@phys.uva.nl (Jim Hetrick) for useful ideas.
90 ;; avk@rtsg.mot.com (Andrew V. Klein) for a dired tip.
91 ;; chris@tecc.co.uk (Chris Boucher) for a mark tip.
92 ;; f89-kam@nada.kth.se (Klas Mellbourn) for a mh-e tip.
93 ;; kifer@sbkifer.cs.sunysb.edu (M. Kifer) for a bug hunt.
94 ;; treese@lcs.mit.edu (Win Treese) for ange-ftp tips.
95 ;; pot@cnuce.cnr.it (Francesco Potorti`) for misc. tips.
96 ;; ---------------------------------------------------------------------------
99 ;; Save window configuration.
100 ;; Recognize more minor modes.
105 ;; Make the compilation more silent
107 ;; We use functions from these modules
108 ;; We can't (require 'mh-e) since that wants to load something.
109 (mapcar 'require '(info dired reporter)))
111 (defvar desktop-file-version "206"
112 "Verion number of desktop file format.
113 Written into the desktop file and used at desktop read to provide
114 backward compatibility.")
116 ;; ----------------------------------------------------------------------------
117 ;; USER OPTIONS -- settings you might want to play with.
118 ;; ----------------------------------------------------------------------------
120 (defgroup desktop nil
121 "Save status of Emacs when you exit."
124 (defcustom desktop-enable nil
125 "*Non-nil enable Desktop to save the state of Emacs when you exit."
129 :initialize 'custom-initialize-default
132 (defcustom desktop-save 'ask-if-new
133 "*When the user changes desktop or quits emacs, should the desktop be saved?
134 \(in the current desktop directory)
137 ask-if-new -- ask if no desktop file exists, otherwise just save.
138 ask-if-exists -- ask if desktop file exists, otherwise don't save.
139 if-exists -- save if desktop file exists, otherwise don't save.
141 The desktop is never saved when `desktop-enable' is nil."
143 (const :tag "Always save" t)
144 (const :tag "Always ask" ask)
145 (const :tag "Ask if desktop file is new, else do save" ask-if-new)
146 (const :tag "Ask if desktop file exists, else don't save" ask-if-exists)
147 (const :tag "Save if desktop file exists, else don't" if-exists)
148 (const :tag "Never save" nil))
151 (defcustom desktop-base-file-name
152 (convert-standard-filename ".emacs.desktop")
153 "File for Emacs desktop, not including the directory name."
156 (defvaralias 'desktop-basefilename 'desktop-base-file-name)
158 (defcustom desktop-path '("." "~")
159 "List of directories to search for the desktop file.
160 The base name of the file is specified in `desktop-base-file-name'."
161 :type '(repeat directory)
164 (defcustom desktop-missing-file-warning nil
165 "*If non-nil then desktop warns when a file no longer exists.
166 Otherwise it simply ignores that file."
170 (defcustom desktop-no-desktop-file-hook nil
171 "Normal hook run after fail of `desktop-read' due to missing desktop file.
172 May e.g. be used to show a dired buffer."
176 (defcustom desktop-after-read-hook nil
177 "Normal hook run after a sucessful `desktop-read'.
178 May e.g. be used to show a buffer list."
182 (defcustom desktop-save-hook nil
183 "Hook run before desktop saves the state of Emacs.
184 This is useful for truncating history lists, for example."
188 (defcustom desktop-globals-to-save '(
189 desktop-missing-file-warning
195 "List of global variables to save when killing Emacs.
196 An element may be variable name (a symbol)
197 or a cons cell of the form (VAR . MAX-SIZE),
198 which means to truncate VAR's value to at most MAX-SIZE elements
199 \(if the value is a list) before saving the value.
200 Feature: Saving `kill-ring' implies saving `kill-ring-yank-pointer'."
201 :type '(repeat (restricted-sexp :match-alternatives (symbolp consp)))
204 (defcustom desktop-globals-to-clear '(
206 kill-ring-yank-pointer
208 search-ring-yank-pointer
210 regexp-search-ring-yank-pointer)
211 "List of global variables set to clear by `desktop-clear'.
212 An element may be variable name (a symbol) or a cons cell of the form
213 \(VAR . FORM). Symbols are set to nil and for cons cells VAR is set
214 to the value obtained by evaluateing FORM."
215 :type '(repeat (restricted-sexp :match-alternatives (symbolp consp)))
218 (defcustom desktop-clear-preserve-buffers-regexp
220 "Regexp identifying buffers that `desktop-clear' should not delete."
224 ;; Maintained for backward compatibility
225 (defcustom desktop-clear-preserve-buffers
226 '("*scratch*" "*Messages*")
227 "*List of buffer names that `desktop-clear' should not delete."
228 :type '(repeat string)
231 (defvar desktop-locals-to-save '(
232 desktop-locals-to-save ; Itself! Think it over.
238 change-log-default-name
240 "List of local variables to save for each buffer.
241 The variables are saved only when they really are local.")
242 (make-variable-buffer-local 'desktop-locals-to-save)
244 ;; We skip .log files because they are normally temporary.
245 ;; (ftp) files because they require passwords and whatnot.
246 ;; TAGS files to save time (tags-file-name is saved instead).
247 (defcustom desktop-buffers-not-to-save
248 "\\(^nn\\.a[0-9]+\\|\\.log\\|(ftp)\\|^tags\\|^TAGS\\)$"
249 "Regexp identifying buffers that are to be excluded from saving."
253 ;; Skip ange-ftp files
254 (defcustom desktop-files-not-to-save
256 "Regexp identifying files whose buffers are to be excluded from saving."
260 (defcustom desktop-buffer-modes-to-save
261 '(Info-mode rmail-mode)
262 "If a buffer is of one of these major modes, save the buffer name.
263 It is up to the functions in `desktop-buffer-handlers' to decide
264 whether the buffer should be recreated or not, and how."
265 :type '(repeat symbol)
268 (defcustom desktop-modes-not-to-save nil
269 "List of major modes whose buffers should not be saved."
270 :type '(repeat symbol)
273 (defcustom desktop-file-name-format 'absolute
274 "*Format in which desktop file names should be saved.
276 absolute -- Absolute file name.
277 tilde -- Relative to ~.
278 local -- Relative to directory of desktop file."
279 :type '(choice (const absolute) (const tilde) (const local))
282 (defcustom desktop-buffer-misc-functions
283 '(desktop-buffer-info-misc-data
284 desktop-buffer-dired-misc-data)
285 "*Functions used to determine auxiliary information for a buffer.
286 These functions are called in order, with no arguments. If a function
287 returns non-nil, its value is saved along with the desktop buffer for
288 which it was called; no further functions will be called.
290 File names should formatted using the call
291 \"(desktop-file-name FILE-NAME dirname)\".
293 Later, when desktop.el restores the buffers it has saved, each of the
294 `desktop-buffer-handlers' functions will have access to a buffer local
295 variable, named `desktop-buffer-misc', whose value is what the
296 \"misc\" function returned previously."
297 :type '(repeat function)
300 (defcustom desktop-buffer-handlers
301 '(desktop-buffer-dired
306 "*List of functions to call in order to create a buffer.
307 The functions are called without explicit parameters but can use the
311 desktop-buffer-file-name
313 desktop-buffer-major-mode
314 desktop-buffer-minor-modes
317 desktop-buffer-read-only
319 desktop-buffer-locals
321 If one function returns non-nil, no further functions are called.
322 If the function returns a buffer, then the saved mode settings
323 and variable values for that buffer are copied into it."
324 :type '(repeat function)
327 (put 'desktop-buffer-handlers 'risky-local-variable t)
329 (defcustom desktop-minor-mode-table
330 '((auto-fill-function auto-fill-mode)
332 "Table mapping minor mode variables to minor mode functions.
333 Each entry has the form (NAME RESTORE-FUNCTION).
334 NAME is the name of the buffer-local variable indicating that the minor
335 mode is active. RESTORE-FUNCTION is the function to activate the minor mode.
336 called. RESTORE-FUNCTION nil means don't try to restore the minor mode.
337 Only minor modes for which the name of the buffer-local variable
338 and the name of the minor mode function are different have to added to
343 ;; ----------------------------------------------------------------------------
344 (defvar desktop-dirname nil
345 "The directory in which the current desktop file resides.")
347 (defconst desktop-header
348 ";; --------------------------------------------------------------------------
349 ;; Desktop File for Emacs
350 ;; --------------------------------------------------------------------------
351 " "*Header to place in Desktop file.")
353 (defvar desktop-delay-hook nil
354 "Hooks run after all buffers are loaded; intended for internal use.")
356 ;; ----------------------------------------------------------------------------
357 (defun desktop-truncate (l n)
358 "Truncate LIST to at most N elements destructively."
359 (let ((here (nthcdr (1- n) l)))
363 ;; ----------------------------------------------------------------------------
364 (defun desktop-clear ()
366 This kills all buffers except for internal ones and those listed
367 in `desktop-clear-preserve-buffers'. Furthermore, it clears the
368 variables listed in `desktop-globals-to-clear'."
370 (dolist (var desktop-globals-to-clear)
372 (eval `(setq-default ,var nil))
373 (eval `(setq-default ,(car var) ,(cdr var)))))
374 (let ((buffers (buffer-list)))
376 (let ((bufname (buffer-name (car buffers))))
379 (string-match desktop-clear-preserve-buffers-regexp bufname)
380 (member bufname desktop-clear-preserve-buffers)
381 ;; Don't kill buffers made for internal purposes.
382 (and (not (equal bufname "")) (eq (aref bufname 0) ?\ ))
383 (kill-buffer (car buffers))))
384 (setq buffers (cdr buffers))))
385 (delete-other-windows))
387 ;; ----------------------------------------------------------------------------
388 (add-hook 'kill-emacs-hook 'desktop-kill)
390 (defun desktop-kill ()
391 "If `desktop-enable' is non-nil, do what `desktop-save' says to do.
392 If the desktop should be saved and `desktop-dirname'
393 is nil, ask the user where to save the desktop."
397 (let ((exists (file-exists-p (concat desktop-dirname desktop-base-file-name))))
400 (and exists (memq desktop-save '(ask-if-new if-exists)))
403 (memq desktop-save '(ask ask-if-new))
404 (and exists (eq desktop-save 'ask-if-exists)))
405 (y-or-n-p "Save desktop? ")))))
406 (unless desktop-dirname
407 (setq desktop-dirname
410 (lambda (dir) (interactive "DDirectory for desktop file: ") dir)))))
412 (desktop-save desktop-dirname)
414 (unless (yes-or-no-p "Error while saving the desktop. Ignore? ")
415 (signal (car err) (cdr err)))))))
417 ;; ----------------------------------------------------------------------------
418 (defun desktop-list* (&rest args)
419 (if (null (cdr args))
421 (setq args (nreverse args))
422 (let ((value (cons (nth 1 args) (car args))))
423 (setq args (cdr (cdr args)))
425 (setq value (cons (car args) value))
426 (setq args (cdr args)))
429 ;; ----------------------------------------------------------------------------
430 (defun desktop-internal-v2s (val)
431 "Convert VALUE to a pair (QUOTE . TXT); (eval (read TXT)) gives VALUE.
432 TXT is a string that when read and evaluated yields value.
433 QUOTE may be `may' (value may be quoted),
434 `must' (values must be quoted), or nil (value may not be quoted)."
436 ((or (numberp val) (null val) (eq t val))
437 (cons 'may (prin1-to-string val)))
439 (let ((copy (copy-sequence val)))
440 (set-text-properties 0 (length copy) nil copy)
441 ;; Get rid of text properties because we cannot read them
442 (cons 'may (prin1-to-string copy))))
444 (cons 'must (prin1-to-string val)))
449 (let ((res (desktop-internal-v2s el)))
455 (cons nil (concat "(vector "
456 (mapconcat (lambda (el)
457 (if (eq (car el) 'must)
458 (concat "'" (cdr el))
463 (cons 'may (concat "[" (mapconcat 'cdr pass1 " ") "]")))))
470 (let ((q.txt (desktop-internal-v2s (car p))))
471 (or anynil (setq anynil (null (car q.txt))))
472 (setq newlist (cons q.txt newlist)))
475 (let ((last (desktop-internal-v2s p))
477 (or anynil (setq anynil (null (car last))))
479 (setq newlist (cons '(must . ".") newlist)))
481 (setq newlist (cons last newlist))))
482 (setq newlist (nreverse newlist))
485 (concat (if use-list* "(desktop-list* " "(list ")
486 (mapconcat (lambda (el)
487 (if (eq (car el) 'must)
488 (concat "'" (cdr el))
494 (concat "(" (mapconcat 'cdr newlist " ") ")")))))
496 (cons nil (concat "(symbol-function '"
497 (substring (prin1-to-string val) 7 -1)
500 (let ((pos (prin1-to-string (marker-position val)))
501 (buf (prin1-to-string (buffer-name (marker-buffer val)))))
502 (cons nil (concat "(let ((mk (make-marker)))"
503 " (add-hook 'desktop-delay-hook"
504 " (list 'lambda '() (list 'set-marker mk "
505 pos " (get-buffer " buf ")))) mk)"))))
507 (cons 'may "\"Unprintable entity\""))))
509 ;; ----------------------------------------------------------------------------
510 (defun desktop-value-to-string (val)
511 "Convert VALUE to a string that when read evaluates to the same value.
512 Not all types of values are supported."
513 (let* ((print-escape-newlines t)
514 (float-output-format nil)
515 (quote.txt (desktop-internal-v2s val))
516 (quote (car quote.txt))
517 (txt (cdr quote.txt)))
522 ;; ----------------------------------------------------------------------------
523 (defun desktop-outvar (varspec)
524 "Output a setq statement for variable VAR to the desktop file.
525 The argument VARSPEC may be the variable name VAR (a symbol),
526 or a cons cell of the form (VAR . MAX-SIZE),
527 which means to truncate VAR's value to at most MAX-SIZE elements
528 \(if the value is a list) before saving the value."
531 (setq var (car varspec) size (cdr varspec))
535 (if (and (integerp size)
538 (desktop-truncate (eval var) size))
542 (desktop-value-to-string (symbol-value var))
545 ;; ----------------------------------------------------------------------------
546 (defun desktop-save-buffer-p (filename bufname mode &rest dummy)
547 "Return t if the desktop should record a particular buffer for next startup.
548 FILENAME is the visited file name, BUFNAME is the buffer name, and
549 MODE is the major mode."
550 (let ((case-fold-search nil))
551 (and (not (string-match desktop-buffers-not-to-save bufname))
552 (not (memq mode desktop-modes-not-to-save))
554 (not (string-match desktop-files-not-to-save filename)))
555 (and (eq mode 'dired-mode)
557 (set-buffer (get-buffer bufname))
558 (not (string-match desktop-files-not-to-save
559 default-directory))))
561 (memq mode desktop-buffer-modes-to-save))))))
563 ;; ----------------------------------------------------------------------------
564 (defun desktop-file-name (filename dirname)
565 "Convert FILENAME to format specified in `desktop-file-name-format'.
566 DIRNAME must be the directory in which the desktop file will be saved."
569 ((eq desktop-file-name-format 'tilde)
570 (let ((relative-name (file-relative-name (expand-file-name filename) "~")))
572 ((file-name-absolute-p relative-name) relative-name)
573 ((string= "./" relative-name) "~/")
574 ((string= "." relative-name) "~")
575 (t (concat "~/" relative-name)))))
576 ((eq desktop-file-name-format 'local) (file-relative-name filename dirname))
577 (t (expand-file-name filename))))
579 ;; ----------------------------------------------------------------------------
580 (defun desktop-save (dirname)
581 "Save the Desktop file. Parameter DIRNAME specifies where to save desktop."
582 (interactive "DDirectory to save desktop file in: ")
583 (run-hooks 'desktop-save-hook)
585 (let ((filename (expand-file-name desktop-base-file-name dirname))
592 (desktop-file-name (buffer-file-name) dirname)
606 (special (assq mim desktop-minor-mode-table))
608 (if special (cadr special) mim))
610 (mapcar #'car minor-mode-alist))
613 (list (mark t) mark-active)
615 (run-hook-with-args-until-success 'desktop-buffer-misc-functions)
617 (locals desktop-locals-to-save)
618 (loclist (buffer-local-variables))
622 (let ((here (assq (car locals) loclist)))
624 (setq ll (cons here ll))
625 (when (member (car locals) loclist)
626 (setq ll (cons (car locals) ll)))))
627 (setq locals (cdr locals)))
630 (buf (get-buffer-create "*desktop*")))
635 ";; -*- coding: emacs-mule; -*-\n"
637 ";; Created " (current-time-string) "\n"
638 ";; Desktop file format version " desktop-file-version "\n"
639 ";; Emacs version " emacs-version "\n\n"
640 ";; Global section:\n")
641 (mapcar (function desktop-outvar) desktop-globals-to-save)
642 (if (memq 'kill-ring desktop-globals-to-save)
644 "(setq kill-ring-yank-pointer (nthcdr "
645 (int-to-string (- (length kill-ring) (length kill-ring-yank-pointer)))
648 (insert "\n;; Buffer section -- buffers listed in same order as in buffer list:\n")
652 (if (apply 'desktop-save-buffer-p l)
654 (insert "(desktop-create-buffer " desktop-file-version)
658 (insert "\n " (desktop-value-to-string e))))
662 (setq default-directory dirname)
663 (when (file-exists-p filename) (delete-file filename))
664 (let ((coding-system-for-write 'emacs-mule))
665 (write-region (point-min) (point-max) filename nil 'nomessage))))
666 (setq desktop-dirname dirname))
668 ;; ----------------------------------------------------------------------------
669 (defun desktop-remove ()
670 "Delete the Desktop file and inactivate the desktop system."
673 (let ((filename (concat desktop-dirname desktop-base-file-name)))
674 (setq desktop-dirname nil)
675 (if (file-exists-p filename)
676 (delete-file filename)))))
678 ;; ----------------------------------------------------------------------------
680 (defun desktop-read ()
681 "Read the Desktop file and the files it specifies.
682 This is a no-op when Emacs is running in batch mode.
683 Look for the desktop file according to the variables `desktop-base-file-name'
684 and `desktop-path'. If no desktop file is found, clear the desktop.
685 Returns t if it has read a desktop file, nil otherwise."
687 (unless noninteractive
688 (let ((dirs desktop-path))
693 (file-exists-p (expand-file-name desktop-base-file-name (car dirs)))))
694 (setq dirs (cdr dirs)))
695 (setq desktop-dirname (and dirs (expand-file-name (car dirs))))
697 (let ((desktop-first-buffer nil))
698 ;; `desktop-create-buffer' sets `desktop-first-buffer' to the first
699 ;; buffer in the desktop file (the last for desktop files written
700 ;; by desktop version prior to 206).
701 (load (expand-file-name desktop-base-file-name desktop-dirname) t t t)
702 (when desktop-first-buffer (switch-to-buffer desktop-first-buffer))
703 (run-hooks 'desktop-delay-hook)
704 (setq desktop-delay-hook nil)
705 (run-hooks 'desktop-after-read-hook)
706 (message "Desktop loaded.")
709 (run-hooks 'desktop-no-desktop-file-hook)
710 (message "No desktop file.")
713 ;; ----------------------------------------------------------------------------
715 (defun desktop-load-default ()
716 "Load the `default' start-up library manually.
717 Also inhibit further loading of it. Call this from your `.emacs' file
718 to provide correct modes for autoloaded files."
719 (if (not inhibit-default-init) ; safety check
722 (setq inhibit-default-init t))))
724 ;; ----------------------------------------------------------------------------
726 (defun desktop-change-dir (dir)
727 "Save and clear the desktop, then load the desktop from directory DIR.
728 However, if `desktop-enable' was nil at call, don't save the old desktop.
729 This function always sets `desktop-enable' to t."
730 (interactive "DNew directory: ")
734 (setq desktop-enable t)
735 (let ((desktop-path '(".")))
737 ;; Set `desktop-dirname' even in no desktop file was found
738 (setq desktop-dirname (expand-file-name dir))))
740 ;; ----------------------------------------------------------------------------
742 (defun desktop-save-in-load-dir ()
743 "Save desktop in directory from which it was loaded."
746 (desktop-save desktop-dirname)
747 (call-interactively 'desktop-save))
748 (message "Desktop saved in %s" desktop-dirname))
750 ;; ----------------------------------------------------------------------------
752 (defun desktop-revert ()
753 "Revert to the last loaded desktop."
755 (unless desktop-dirname (error "No desktop has been loaded"))
756 (setq desktop-enable nil)
757 (desktop-change-dir desktop-dirname))
759 ;; ----------------------------------------------------------------------------
760 ;; Note: the following functions use the dynamic variable binding in Lisp.
763 (eval-when-compile ; Just to silence the byte compiler
764 (defvar desktop-file-version)
765 (defvar desktop-buffer-file-name)
766 (defvar desktop-buffer-name)
767 (defvar desktop-buffer-major-mode)
768 (defvar desktop-buffer-minor-modes)
769 (defvar desktop-buffer-point)
770 (defvar desktop-buffer-mark)
771 (defvar desktop-buffer-read-only)
772 (defvar desktop-buffer-misc)
773 (defvar desktop-buffer-locals)
776 (defun desktop-buffer-info-misc-data ()
777 (if (eq major-mode 'Info-mode)
778 (list Info-current-file
781 ;; ----------------------------------------------------------------------------
782 (defun desktop-buffer-dired-misc-data ()
783 (when (eq major-mode 'dired-mode)
784 (eval-when-compile (defvar dirname))
786 ;; dired directory in portable form
787 (file-name-as-directory (desktop-file-name dired-directory dirname))
788 (cdr (nreverse (mapcar (function car) dired-subdir-alist))))))
790 ;; ----------------------------------------------------------------------------
791 (defun desktop-buffer-info () "Load an info file."
792 (if (eq 'Info-mode desktop-buffer-major-mode)
794 (let ((first (nth 0 desktop-buffer-misc))
795 (second (nth 1 desktop-buffer-misc)))
796 (when (and first second)
798 (Info-find-node first second)
799 (current-buffer))))))
801 ;; ----------------------------------------------------------------------------
802 (eval-when-compile (defvar rmail-buffer)) ; Just to silence the byte compiler.
803 (defun desktop-buffer-rmail () "Load an RMAIL file."
804 (if (eq 'rmail-mode desktop-buffer-major-mode)
805 (condition-case error
806 (progn (rmail-input desktop-buffer-file-name)
807 (if (eq major-mode 'rmail-mode)
811 (kill-buffer (current-buffer))
814 ;; ----------------------------------------------------------------------------
815 (defun desktop-buffer-mh () "Load a folder in the mh system."
816 (if (eq 'mh-folder-mode desktop-buffer-major-mode)
819 (mh-visit-folder desktop-buffer-name)
822 ;; ----------------------------------------------------------------------------
823 (defun desktop-buffer-dired () "Load a directory using dired."
824 (if (eq 'dired-mode desktop-buffer-major-mode)
825 (if (file-directory-p (file-name-directory (car desktop-buffer-misc)))
827 (dired (car desktop-buffer-misc))
828 (mapcar 'dired-maybe-insert-subdir (cdr desktop-buffer-misc))
830 (message "Directory %s no longer exists." (car desktop-buffer-misc))
834 ;; ----------------------------------------------------------------------------
835 (defun desktop-buffer-file ()
837 (if desktop-buffer-file-name
838 (if (or (file-exists-p desktop-buffer-file-name)
839 (and desktop-missing-file-warning
841 "File \"%s\" no longer exists. Re-create? "
842 desktop-buffer-file-name))))
843 (let ((buf (find-file-noselect desktop-buffer-file-name)))
845 (switch-to-buffer buf)
846 (error (pop-to-buffer buf)))
847 (and (not (eq major-mode desktop-buffer-major-mode))
848 (functionp desktop-buffer-major-mode)
849 (funcall desktop-buffer-major-mode))
853 ;; ----------------------------------------------------------------------------
854 ;; Create a buffer, load its file, set is mode, ...; called from Desktop file
857 (eval-when-compile ; Just to silence the byte compiler
858 (defvar desktop-first-buffer) ;; Dynamically bound in `desktop-read'
861 (defun desktop-create-buffer (
863 desktop-buffer-file-name
865 desktop-buffer-major-mode
866 desktop-buffer-minor-modes
869 desktop-buffer-read-only
872 desktop-buffer-locals)
873 ;; To make desktop files with relative file names possible, we cannot
874 ;; allow `default-directory' to change. Therefore we save current buffer.
877 (buffer-list (buffer-list))
878 (hlist desktop-buffer-handlers)
882 ;; Call desktop-buffer-handlers to create buffer.
883 (while (and (not result) hlist)
884 (setq handler (car hlist))
885 (setq result (funcall handler))
886 (setq hlist (cdr hlist)))
887 (unless (bufferp result) (setq result nil))
888 (unless (< desktop-file-version 206)
889 (when result (setq buffer-list (cons result buffer-list)))
890 (mapcar 'bury-buffer buffer-list))
892 (if (< desktop-file-version 206)
893 (setq desktop-first-buffer result)
894 (bury-buffer result))
895 (unless desktop-first-buffer (setq desktop-first-buffer result))
897 (unless (equal (buffer-name) desktop-buffer-name)
898 (rename-buffer desktop-buffer-name))
901 ;; backwards compatible
902 (equal '(t) desktop-buffer-minor-modes)
904 (equal '(nil) desktop-buffer-minor-modes)
908 #'(lambda (minor-mode)
909 (when (functionp minor-mode) (funcall minor-mode 1)))
910 desktop-buffer-minor-modes)))
911 ;; Even though point and mark are non-nil when written by `desktop-save'
912 ;; they may be modified by mandlers wanting to set point or mark themselves.
913 (when desktop-buffer-point (goto-char desktop-buffer-point))
914 (when desktop-buffer-mark
915 (if (consp desktop-buffer-mark)
917 (set-mark (car desktop-buffer-mark))
918 (setq mark-active (car (cdr desktop-buffer-mark))))
919 (set-mark desktop-buffer-mark)))
920 ;; Never override file system if the file really is read-only marked.
921 (if desktop-buffer-read-only (setq buffer-read-only desktop-buffer-read-only))
922 (while desktop-buffer-locals
923 (let ((this (car desktop-buffer-locals)))
925 ;; an entry of this form `(symbol . value)'
927 (make-local-variable (car this))
928 (set (car this) (cdr this)))
929 ;; an entry of the form `symbol'
930 (make-local-variable this)
932 (setq desktop-buffer-locals (cdr desktop-buffer-locals)))))))
934 ;; ----------------------------------------------------------------------------
935 ;; Backward compatibility -- update parameters to 205 standards.
936 (defun desktop-buffer (desktop-buffer-file-name desktop-buffer-name
937 desktop-buffer-major-mode
938 mim pt mk ro tl fc cfs cr desktop-buffer-misc)
939 (desktop-create-buffer 205 desktop-buffer-file-name desktop-buffer-name
940 desktop-buffer-major-mode (cdr mim) pt mk ro
942 (list (cons 'truncate-lines tl)
943 (cons 'fill-column fc)
944 (cons 'case-fold-search cfs)
945 (cons 'case-replace cr)
946 (cons 'overwrite-mode (car mim)))))
948 ;; ----------------------------------------------------------------------------
949 ;; When `desktop-enable' is non-nil and "--no-desktop" is not specified on the
950 ;; command line, we do the rest of what it takes to use desktop, but do it
951 ;; after finishing loading the init file.
952 ;; We cannot use `command-switch-alist' to process "--no-desktop" because these
953 ;; functions are processed after `after-init-hook'.
957 (let ((key "--no-desktop"))
958 (if (member key command-line-args)
959 (delete key command-line-args)
961 (desktop-load-default)
966 ;;; desktop.el ends here