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