X-Git-Url: http://git.hcoop.net/bpt/emacs.git/blobdiff_plain/ab1d55ea3190c7b4839051d189942c00a4481f5e..7c7ff7f5d18ebe74842db645eb6ff4b63e778f0b:/lisp/desktop.el diff --git a/lisp/desktop.el b/lisp/desktop.el dissimilarity index 72% index 4191788091..e59d57c07f 100644 --- a/lisp/desktop.el +++ b/lisp/desktop.el @@ -1,344 +1,689 @@ -;;; desktop.el --- save partial status of Emacs when killed - -;; Copyright (C) 1993 Free Software Foundation, Inc. - -;; Author: Morten Welinder -;; Version: 2.01 - -;; This file is part of GNU Emacs. - -;; GNU Emacs is free software; you can redistribute it and/or modify -;; it under the terms of the GNU General Public License as published by -;; the Free Software Foundation; either version 2, or (at your option) -;; any later version. - -;; GNU Emacs is distributed in the hope that it will be useful, -;; but WITHOUT ANY WARRANTY; without even the implied warranty of -;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -;; GNU General Public License for more details. - -;; You should have received a copy of the GNU General Public License -;; along with GNU Emacs; see the file COPYING. If not, write to -;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - -;;; Commentary: - -; Save the Desktop, i.e., -; - some global variables -; - the list of buffers with associated files. For each buffer also -; - the major mode -; - the default directory -; - the point -; - the mark -; - buffer-read-only -; - truncate-lines -; - case-fold-search -; - case-replace -; - fill-column - -; To use this, first put these three lines in the bottom of your .emacs -; file (the later the better): -; -; (load "desktop") -; (desktop-load-default) -; (desktop-read) -; - -; Start Emacs in the root directory of your "project". The desktop saver -; is inactive by default. You activate it by M-X desktop-save RET. When -; you exit the next time the above data will be saved. This ensures that -; all the files you were editing will be reloaded the next time you start -; Emacs from the same directory and that points will be set where you -; left them. -; -; PLEASE NOTE: When the kill ring is saved as specified by the variable -; `desktop-globals-to-save' (by default it isn't). This may result in saving -; things you did not mean to keep. Use M-X desktop-clear RET. -; -; Thanks to hetrick@phys.uva.nl (Jim Hetrick) for useful ideas. -; --------------------------------------------------------------------------- -; HISTORY: -; -; Dec , 1992: Version 1.0 written; never released. -; Jan , 1993: Minor modes now saved: auto-fill-mode, overwrite-mode. -; Apr 26, 1993: Version 1.1 released. -; Apr 29, 1993: Now supports RMAIL, Info, and dired modes. -; Will now search home directory for desktop file. -; desktop-save asks for directory to save in. -; May 31, 1993: Version 1.3 -; Now works with Emacs 19. -; Jun 1, 1993: Minor bug fix. -; -; TODO: -; -; Save window configuration. -; Recognize more minor modes. -; Save mark rings. -; Start-up with buffer-menu??? - -;;; Code: - -; USER OPTIONS -- settings you might want to play with. -; ----------------------------------------------------------------------------- -(defconst desktop-basefilename - (if (equal system-type 'ms-dos) - "emacs.dsk" ; Ms-Dos does not support multiple dots in file name - ".emacs.desktop") - "File for Emacs desktop. A directory name will be prepended to this name.") - -(defvar desktop-missing-file-warning t - "*If non-nil then issue warning if a file no longer exists. -Otherwise simply ignore the file.") - -(defvar desktop-globals-to-save - (list 'desktop-missing-file-warning - ; 'kill-ring ; Feature: Also saves kill-ring-yank-pointer - 'desktop-globals-to-save) ; Itself! - "List of global variables to save when killing Emacs.") - -(defvar desktop-buffers-not-to-save - "\\(\\.log\\|(ftp)\\)$" - "Regexp identifying buffers that are to be excluded from saving.") - -(defvar desktop-buffer-handlers - '(desktop-buffer-dired - desktop-buffer-rmail - desktop-buffer-info - desktop-buffer-file) - "*List of functions to call in order to create a buffer. -The functions are called without parameters -but may access the the major mode as `mam', -the file name as `fn', the buffer name as `bn', the default directory as -`dd'. If some function returns non-nil no further functions are called. -If the function returns t then the buffer is considered created.") -; --------------------------------------------------------------------------- -(defvar desktop-dirname nil - "The directory in which the current desktop file resides.") - -(defconst desktop-header -"; --------------------------------------------------------------------------- -; Desktop File for Emacs -; --------------------------------------------------------------------------- -" "*Header to place in Desktop file.") -; --------------------------------------------------------------------------- -(defconst postv18 - (string-lessp "19" emacs-version) - "t is Emacs version 19 or later.") - -(defun desktop-clear () "Empty the Desktop." - (interactive) - (setq kill-ring nil) - (setq kill-ring-yank-pointer nil) - (mapcar (function kill-buffer) (buffer-list))) -; --------------------------------------------------------------------------- -(if (not (boundp 'desktop-kill)) - (if postv18 - (add-hook 'kill-emacs-hook 'desktop-kill) - (setq old-kill-emacs kill-emacs-hook) - (setq kill-emacs-hook - (function (lambda () (progn (desktop-kill) - (run-hooks old-kill-emacs))))))) -; --------------------------------------------------------------------------- -(defun desktop-kill () - (if desktop-dirname - (progn - (desktop-save desktop-dirname)))) - -;(defun kill-emacs (&optional query) -; "End this Emacs session. -;Prefix ARG or optional first ARG non-nil means exit with no questions asked, -;even if there are unsaved buffers. If Emacs is running non-interactively -;and ARG is an integer, then Emacs exits with ARG as its exit code. -; -;If the variable `desktop-dirname' is non-nil, -;the function desktop-save will be called first." -; (interactive "P") -; (if desktop-dirname (desktop-save desktop-dirname)) -; (original-kill-emacs query)) -; --------------------------------------------------------------------------- -(defun desktop-outvar (VAR) - "Output a setq statement for VAR to the desktop file." - (if (boundp VAR) - (progn - (insert "(setq ") - (prin1 VAR (current-buffer)) - (insert " '") - (prin1 (symbol-value VAR) (current-buffer)) - (insert ")\n")))) -; --------------------------------------------------------------------------- -(defun desktop-save-buffer-p (filename bufname mode) - "Return t if should record a particular buffer for next startup. -FILENAME is the visited file name, BUFNAME is the buffer name, and -MODE is the major mode." - - (or (and filename - (not (string-match desktop-buffers-not-to-save bufname))) - (and (null filename) - (memq mode '(Info-mode dired-mode rmail-mode))))) -; --------------------------------------------------------------------------- -(defun desktop-save (dirname) - "Save the Desktop file. Parameter DIRNAME specifies where to save desktop." - (interactive "DDirectory to save desktop file in: ") - (save-excursion - (let ((filename (expand-file-name - (concat dirname desktop-basefilename))) - (info (nreverse - (mapcar - (function (lambda (b) - (set-buffer b) - (list - (buffer-file-name) - (buffer-name) - (list 'quote major-mode) - (list 'quote - (list overwrite-mode - (not (null - (if postv18 - auto-fill-function - auto-fill-hook))))) - (point) - (if postv18 - (mark t) - (mark)) - buffer-read-only - truncate-lines - fill-column - case-fold-search - case-replace - (list - 'quote - (cond ((equal major-mode 'Info-mode) - (list Info-current-file - Info-current-node)) - ((equal major-mode 'dired-mode) - (list default-directory)) - )) - ))) - (buffer-list)))) - (buf (get-buffer-create "*desktop*"))) - (set-buffer buf) - (erase-buffer) - - (insert desktop-header - "; Created " (current-time-string) "\n" - "; Emacs version " emacs-version "\n\n" - "; Global section:\n") - (mapcar (function desktop-outvar) desktop-globals-to-save) - (if (memq 'kill-ring desktop-globals-to-save) - (insert "(setq kill-ring-yank-pointer (nthcdr " - (int-to-string - (- (length kill-ring) (length kill-ring-yank-pointer))) - " kill-ring))\n")) - - (insert "\n; Buffer section:\n") - (mapcar - (function (lambda (l) - (if (desktop-save-buffer-p - (car l) - (nth 1 l) - (nth 1 (nth 2 l))) - (progn - (insert "(desktop-buffer") - (mapcar - (function (lambda (e) - (insert "\n ") - (prin1 e (current-buffer)))) - l) - (insert ")\n\n"))))) - info) - (setq default-directory dirname) - (if (file-exists-p filename) (delete-file filename)) - (write-region (point-min) (point-max) filename nil 'nomessage))) - (setq desktop-dirname dirname)) -; --------------------------------------------------------------------------- -(defun desktop-remove () - "Delete the Desktop file and inactivate the desktop system." - (interactive) - (if desktop-dirname - (let ((filename (concat desktop-dirname desktop-basefilename))) - (if (file-exists-p filename) (delete-file filename)) - (setq desktop-dirname nil)))) -; --------------------------------------------------------------------------- -(defun desktop-read () - "Read the Desktop file and the files it specifies." - (interactive) - (let ((filename)) - (if (file-exists-p (concat "./" desktop-basefilename)) - (setq desktop-dirname (expand-file-name "./")) - (if (file-exists-p (concat "~/" desktop-basefilename)) - (setq desktop-dirname (expand-file-name "~/")) - (setq desktop-dirname nil))) - (if desktop-dirname - (progn - (load (concat desktop-dirname desktop-basefilename) t t t) - (message "Desktop loaded.")) - (desktop-clear)))) -; --------------------------------------------------------------------------- -(defun desktop-load-default () - "Load the `default' start-up library manually. -Also inhibit further loading of it. -Call this from your `.emacs' file -provide correct modes for autoloaded files." - (if (not inhibit-default-init) - (progn - (load "default" t t) - (setq inhibit-default-init t)))) -; --------------------------------------------------------------------------- -(defun desktop-buffer-info () "Load an info file." - (if (equal 'Info-mode mam) - (progn - (require 'info) - (Info-find-node (nth 0 misc) (nth 1 misc)) - t))) -; --------------------------------------------------------------------------- -(defun desktop-buffer-rmail () "Load a RMAIL file." - (if (equal 'rmail-mode mam) - (progn (rmail-input fn) t))) -; --------------------------------------------------------------------------- -(defun desktop-buffer-dired () "Load a directory using dired." - (if (equal 'dired-mode mam) - (progn (dired (nth 0 misc)) t))) -; --------------------------------------------------------------------------- -(defun desktop-buffer-file () "Load a file." - (if fn - (if (or (file-exists-p fn) - (and desktop-missing-file-warning - (y-or-n-p (format - "File \"%s\" no longer exists. Re-create? " - fn)))) - (progn (find-file fn) t) - 'ignored))) -; --------------------------------------------------------------------------- -;;Create a buffer, load its file, set is mode, ...; called from Desktop file -;; only. -(defun desktop-buffer (fn bn mam mim pt mk ro tl fc cfs cr misc) - (let ((hlist desktop-buffer-handlers) - (result) - (handler)) - (while (and (not result) hlist) - (setq handler (car hlist)) - (setq result (funcall handler)) - (setq hlist (cdr hlist))) - (if (equal result t) - (progn - (if (not (equal (buffer-name) bn)) - (rename-buffer bn)) - (if (nth 0 mim) - (overwrite-mode 1) - (overwrite-mode 0)) - (if (nth 1 mim) - (auto-fill-mode 1) - (overwrite-mode 0)) - (goto-char pt) - (set-mark mk) - (setq buffer-read-only ro) - (setq truncate-lines tl) - (setq fill-column fc) - (setq case-fold-search cfs) - (setq case-replace cr) - )))) -; --------------------------------------------------------------------------- - -(provide 'desktop) - -;; desktop.el ends here. +;;; desktop.el --- save partial status of Emacs when killed + +;; Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc. + +;; Author: Morten Welinder +;; Keywords: convenience +;; Favourite-brand-of-beer: None, I hate beer. + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +;;; Commentary: + +;; Save the Desktop, i.e., +;; - some global variables +;; - the list of buffers with associated files. For each buffer also +;; - the major mode +;; - the default directory +;; - the point +;; - the mark & mark-active +;; - buffer-read-only +;; - some local variables + +;; To use this, first put these two lines in the bottom of your .emacs +;; file (the later the better): +;; +;; (desktop-load-default) +;; (desktop-read) +;; +;; Between these two lines you may wish to add something that updates the +;; variables `desktop-globals-to-save' and/or `desktop-locals-to-save'. If +;; for instance you want to save the local variable `foobar' for every buffer +;; in which it is local, you could add the line +;; +;; (setq desktop-locals-to-save (cons 'foobar desktop-locals-to-save)) +;; +;; To avoid saving excessive amounts of data you may also wish to add +;; something like the following +;; +;; (add-hook 'kill-emacs-hook +;; '(lambda () +;; (desktop-truncate search-ring 3) +;; (desktop-truncate regexp-search-ring 3))) +;; +;; which will make sure that no more than three search items are saved. You +;; must place this line *after* the `(desktop-load-default)' line. See also +;; the variable `desktop-save-hook'. + +;; Start Emacs in the root directory of your "project". The desktop saver +;; is inactive by default. You activate it by M-x desktop-save RET. When +;; you exit the next time the above data will be saved. This ensures that +;; all the files you were editing will be reloaded the next time you start +;; Emacs from the same directory and that points will be set where you +;; left them. If you save a desktop file in your home directory it will +;; act as a default desktop when you start Emacs from a directory that +;; doesn't have its own. I never do this, but you may want to. + +;; Some words on minor modes: Most minor modes are controlled by +;; buffer-local variables, which have a standard save / restore +;; mechanism. To handle all minor modes, we take the following +;; approach: (1) check whether the variable name from +;; `minor-mode-alist' is also a function; and (2) use translation +;; table `desktop-minor-mode-table' in the case where the two names +;; are not the same. + +;; By the way: don't use desktop.el to customize Emacs -- the file .emacs +;; in your home directory is used for that. Saving global default values +;; for buffers is an example of misuse. + +;; PLEASE NOTE: The kill ring can be saved as specified by the variable +;; `desktop-globals-to-save' (by default it isn't). This may result in saving +;; things you did not mean to keep. Use M-x desktop-clear RET. + +;; Thanks to hetrick@phys.uva.nl (Jim Hetrick) for useful ideas. +;; avk@rtsg.mot.com (Andrew V. Klein) for a dired tip. +;; chris@tecc.co.uk (Chris Boucher) for a mark tip. +;; f89-kam@nada.kth.se (Klas Mellbourn) for a mh-e tip. +;; kifer@sbkifer.cs.sunysb.edu (M. Kifer) for a bug hunt. +;; treese@lcs.mit.edu (Win Treese) for ange-ftp tips. +;; pot@cnuce.cnr.it (Francesco Potorti`) for misc. tips. +;; --------------------------------------------------------------------------- +;; TODO: +;; +;; Save window configuration. +;; Recognize more minor modes. +;; Save mark rings. +;; Start-up with buffer-menu??? + +;;; Code: + +;; Make the compilation more silent +(eval-when-compile + ;; We use functions from these modules + ;; We can't (require 'mh-e) since that wants to load something. + (mapcar 'require '(info dired reporter))) +;; ---------------------------------------------------------------------------- +;; USER OPTIONS -- settings you might want to play with. +;; ---------------------------------------------------------------------------- + +(defgroup desktop nil + "Save status of Emacs when you exit." + :group 'frames) + +(defcustom desktop-enable nil + "*Non-nil enable Desktop to save the state of Emacs when you exit." + :group 'desktop + :type 'boolean + :require 'desktop + :initialize 'custom-initialize-default + :version "20.3") + +(defcustom desktop-basefilename + (convert-standard-filename ".emacs.desktop") + "File for Emacs desktop, not including the directory name." + :type 'file + :group 'desktop) + +(defcustom desktop-missing-file-warning nil + "*If non-nil then desktop warns when a file no longer exists. +Otherwise it simply ignores that file." + :type 'boolean + :group 'desktop) + +(defvar desktop-globals-to-save + (list 'desktop-missing-file-warning + ;; Feature: saving kill-ring implies saving kill-ring-yank-pointer + ;; 'kill-ring + 'tags-file-name + 'tags-table-list + 'search-ring + 'regexp-search-ring + 'register-alist + ;; 'desktop-globals-to-save ; Itself! + ) + "List of global variables to save when killing Emacs. +An element may be variable name (a symbol) +or a cons cell of the form (VAR . MAX-SIZE), +which means to truncate VAR's value to at most MAX-SIZE elements +\(if the value is a list) before saving the value.") + +(defvar desktop-locals-to-save + (list 'desktop-locals-to-save ; Itself! Think it over. + 'truncate-lines + 'case-fold-search + 'case-replace + 'fill-column + 'overwrite-mode + 'change-log-default-name + 'line-number-mode + ) + "List of local variables to save for each buffer. +The variables are saved only when they really are local.") +(make-variable-buffer-local 'desktop-locals-to-save) + +;; We skip .log files because they are normally temporary. +;; (ftp) files because they require passwords and whatnot. +;; TAGS files to save time (tags-file-name is saved instead). +(defcustom desktop-buffers-not-to-save + "\\(^nn\\.a[0-9]+\\|\\.log\\|(ftp)\\|^tags\\|^TAGS\\)$" + "Regexp identifying buffers that are to be excluded from saving." + :type 'regexp + :group 'desktop) + +;; Skip ange-ftp files +(defcustom desktop-files-not-to-save + "^/[^/:]*:" + "Regexp identifying files whose buffers are to be excluded from saving." + :type 'regexp + :group 'desktop) + +(defcustom desktop-buffer-major-mode nil + "When desktop creates a buffer, this holds the desired Major mode." + :type 'symbol + :group 'desktop) + +(defcustom desktop-buffer-file-name nil + "When desktop creates a buffer, this holds the file name to visit." + :type '(choice file (const nil)) + :group 'desktop) + +(defcustom desktop-buffer-name nil + "When desktop creates a buffer, this holds the desired buffer name." + :type '(choice string (const nil)) + :group 'desktop) + +(defvar desktop-buffer-misc nil + "When desktop creates a buffer, this holds a list of misc info. +It is used by the `desktop-buffer-handlers' functions.") + +(defcustom desktop-buffer-handlers + '(desktop-buffer-dired + desktop-buffer-rmail + desktop-buffer-mh + desktop-buffer-info + desktop-buffer-file) + "*List of functions to call in order to create a buffer. +The functions are called without explicit parameters but can use the +variables `desktop-buffer-major-mode', `desktop-buffer-file-name', +`desktop-buffer-name'. +If one function returns non-nil, no further functions are called. +If the function returns t then the buffer is considered created." + :type '(repeat function) + :group 'desktop) + +(defvar desktop-create-buffer-form "(desktop-create-buffer 205" + "Opening of form for creation of new buffers.") + +(defcustom desktop-save-hook nil + "Hook run before desktop saves the state of Emacs. +This is useful for truncating history lists, for example." + :type 'hook + :group 'desktop) + +(defcustom desktop-minor-mode-table + '((auto-fill-function auto-fill-mode) + (vc-mode nil)) + "Table mapping minor mode variables to minor mode functions. +Each entry has the form (NAME RESTORE-FUNCTION). +NAME is the name of the buffer-local variable indicating that the minor +mode is active. RESTORE-FUNCTION is the function to activate the minor mode. +called. RESTORE-FUNCTION nil means don't try to restore the minor mode. +Only minor modes for which the name of the buffer-local variable +and the name of the minor mode function are different have to added to +this table." + :type 'sexp + :group 'desktop) + +;; ---------------------------------------------------------------------------- +(defvar desktop-dirname nil + "The directory in which the current desktop file resides.") + +(defconst desktop-header +";; -------------------------------------------------------------------------- +;; Desktop File for Emacs +;; -------------------------------------------------------------------------- +" "*Header to place in Desktop file.") + +(defvar desktop-delay-hook nil + "Hooks run after all buffers are loaded; intended for internal use.") + +;; ---------------------------------------------------------------------------- +(defun desktop-truncate (l n) + "Truncate LIST to at most N elements destructively." + (let ((here (nthcdr (1- n) l))) + (if (consp here) + (setcdr here nil)))) +;; ---------------------------------------------------------------------------- +(defcustom desktop-clear-preserve-buffers + '("*scratch*" "*Messages*") + "*Buffer names that `desktop-clear' should not delete." + :type '(repeat string) + :group 'desktop) + +(defun desktop-clear () + "Empty the Desktop. +This kills all buffers except for internal ones +and those listed in `desktop-clear-preserve-buffers'." + (interactive) + (setq kill-ring nil + kill-ring-yank-pointer nil + search-ring nil + search-ring-yank-pointer nil + regexp-search-ring nil + regexp-search-ring-yank-pointer nil) + (let ((buffers (buffer-list))) + (while buffers + (or (member (buffer-name (car buffers)) desktop-clear-preserve-buffers) + (null (buffer-name (car buffers))) + ;; Don't kill buffers made for internal purposes. + (and (not (equal (buffer-name (car buffers)) "")) + (eq (aref (buffer-name (car buffers)) 0) ?\ )) + (kill-buffer (car buffers))) + (setq buffers (cdr buffers)))) + (delete-other-windows)) +;; ---------------------------------------------------------------------------- +(add-hook 'kill-emacs-hook 'desktop-kill) + +(defun desktop-kill () + (if desktop-dirname + (condition-case err + (desktop-save desktop-dirname) + (file-error + (if (yes-or-no-p "Error while saving the desktop. Quit anyway? ") + nil + (signal (car err) (cdr err))))))) +;; ---------------------------------------------------------------------------- +(defun desktop-list* (&rest args) + (if (null (cdr args)) + (car args) + (setq args (nreverse args)) + (let ((value (cons (nth 1 args) (car args)))) + (setq args (cdr (cdr args))) + (while args + (setq value (cons (car args) value)) + (setq args (cdr args))) + value))) + +(defun desktop-internal-v2s (val) + "Convert VALUE to a pair (QUOTE . TXT); (eval (read TXT)) gives VALUE. +TXT is a string that when read and evaluated yields value. +QUOTE may be `may' (value may be quoted), +`must' (values must be quoted), or nil (value may not be quoted)." + (cond + ((or (numberp val) (null val) (eq t val)) + (cons 'may (prin1-to-string val))) + ((stringp val) + (let ((copy (copy-sequence val))) + (set-text-properties 0 (length copy) nil copy) + ;; Get rid of text properties because we cannot read them + (cons 'may (prin1-to-string copy)))) + ((symbolp val) + (cons 'must (prin1-to-string val))) + ((vectorp val) + (let* ((special nil) + (pass1 (mapcar + (lambda (el) + (let ((res (desktop-internal-v2s el))) + (if (null (car res)) + (setq special t)) + res)) + val))) + (if special + (cons nil (concat "(vector " + (mapconcat (lambda (el) + (if (eq (car el) 'must) + (concat "'" (cdr el)) + (cdr el))) + pass1 + " ") + ")")) + (cons 'may (concat "[" (mapconcat 'cdr pass1 " ") "]"))))) + ((consp val) + (let ((p val) + newlist + use-list* + anynil) + (while (consp p) + (let ((q.txt (desktop-internal-v2s (car p)))) + (or anynil (setq anynil (null (car q.txt)))) + (setq newlist (cons q.txt newlist))) + (setq p (cdr p))) + (if p + (let ((last (desktop-internal-v2s p)) + (el (car newlist))) + (or anynil (setq anynil (null (car last)))) + (or anynil + (setq newlist (cons '(must . ".") newlist))) + (setq use-list* t) + (setq newlist (cons last newlist)))) + (setq newlist (nreverse newlist)) + (if anynil + (cons nil + (concat (if use-list* "(desktop-list* " "(list ") + (mapconcat (lambda (el) + (if (eq (car el) 'must) + (concat "'" (cdr el)) + (cdr el))) + newlist + " ") + ")")) + (cons 'must + (concat "(" (mapconcat 'cdr newlist " ") ")"))))) + ((subrp val) + (cons nil (concat "(symbol-function '" + (substring (prin1-to-string val) 7 -1) + ")"))) + ((markerp val) + (let ((pos (prin1-to-string (marker-position val))) + (buf (prin1-to-string (buffer-name (marker-buffer val))))) + (cons nil (concat "(let ((mk (make-marker)))" + " (add-hook 'desktop-delay-hook" + " (list 'lambda '() (list 'set-marker mk " + pos " (get-buffer " buf ")))) mk)")))) + (t ; save as text + (cons 'may "\"Unprintable entity\"")))) + +(defun desktop-value-to-string (val) + "Convert VALUE to a string that when read evaluates to the same value. +Not all types of values are supported." + (let* ((print-escape-newlines t) + (float-output-format nil) + (quote.txt (desktop-internal-v2s val)) + (quote (car quote.txt)) + (txt (cdr quote.txt))) + (if (eq quote 'must) + (concat "'" txt) + txt))) +;; ---------------------------------------------------------------------------- +(defun desktop-outvar (varspec) + "Output a setq statement for variable VAR to the desktop file. +The argument VARSPEC may be the variable name VAR (a symbol), +or a cons cell of the form (VAR . MAX-SIZE), +which means to truncate VAR's value to at most MAX-SIZE elements +\(if the value is a list) before saving the value." + (let (var size) + (if (consp varspec) + (setq var (car varspec) size (cdr varspec)) + (setq var varspec)) + (if (boundp var) + (progn + (if (and (integerp size) + (> size 0) + (listp (eval var))) + (desktop-truncate (eval var) size)) + (insert "(setq " + (symbol-name var) + " " + (desktop-value-to-string (symbol-value var)) + ")\n"))))) +;; ---------------------------------------------------------------------------- +(defun desktop-save-buffer-p (filename bufname mode &rest dummy) + "Return t if the desktop should record a particular buffer for next startup. +FILENAME is the visited file name, BUFNAME is the buffer name, and +MODE is the major mode." + (let ((case-fold-search nil)) + (or (and filename + (not (string-match desktop-buffers-not-to-save bufname)) + (not (string-match desktop-files-not-to-save filename))) + (and (eq mode 'dired-mode) + (save-excursion + (set-buffer (get-buffer bufname)) + (not (string-match desktop-files-not-to-save + default-directory)))) + (and (null filename) + (memq mode '(Info-mode rmail-mode)))))) +;; ---------------------------------------------------------------------------- +(defun desktop-save (dirname) + "Save the Desktop file. Parameter DIRNAME specifies where to save desktop." + (interactive "DDirectory to save desktop file in: ") + (run-hooks 'desktop-save-hook) + (save-excursion + (let ((filename (expand-file-name + (concat dirname desktop-basefilename))) + (info (nreverse + (mapcar + (function + (lambda (b) + (set-buffer b) + (list + (buffer-file-name) + (buffer-name) + major-mode + ;; minor modes + (let (ret) + (mapcar + #'(lambda (mim) + (and (symbol-value mim) + (setq ret + (cons (let ((special (assq mim desktop-minor-mode-table))) + (if special + (cadr special) + mim)) + ret)))) + (mapcar #'car minor-mode-alist)) + ret) + (point) + (list (mark t) mark-active) + buffer-read-only + (cond ((eq major-mode 'Info-mode) + (list Info-current-file + Info-current-node)) + ((eq major-mode 'dired-mode) + (cons + (expand-file-name dired-directory) + (cdr + (nreverse + (mapcar + (function car) + dired-subdir-alist)))))) + (let ((locals desktop-locals-to-save) + (loclist (buffer-local-variables)) + (ll)) + (while locals + (let ((here (assq (car locals) loclist))) + (if here + (setq ll (cons here ll)) + (if (member (car locals) loclist) + (setq ll (cons (car locals) ll))))) + (setq locals (cdr locals))) + ll) + ))) + (buffer-list)))) + (buf (get-buffer-create "*desktop*"))) + (set-buffer buf) + (erase-buffer) + + (insert desktop-header + ";; Created " (current-time-string) "\n" + ";; Emacs version " emacs-version "\n\n" + ";; Global section:\n") + (mapcar (function desktop-outvar) desktop-globals-to-save) + (if (memq 'kill-ring desktop-globals-to-save) + (insert "(setq kill-ring-yank-pointer (nthcdr " + (int-to-string + (- (length kill-ring) (length kill-ring-yank-pointer))) + " kill-ring))\n")) + + (insert "\n;; Buffer section:\n") + (mapcar + (function (lambda (l) + (if (apply 'desktop-save-buffer-p l) + (progn + (insert desktop-create-buffer-form) + (mapcar + (function (lambda (e) + (insert "\n " + (desktop-value-to-string e)))) + l) + (insert ")\n\n"))))) + info) + (setq default-directory dirname) + (if (file-exists-p filename) (delete-file filename)) + (write-region (point-min) (point-max) filename nil 'nomessage))) + (setq desktop-dirname dirname)) +;; ---------------------------------------------------------------------------- +(defun desktop-remove () + "Delete the Desktop file and inactivate the desktop system." + (interactive) + (if desktop-dirname + (let ((filename (concat desktop-dirname desktop-basefilename))) + (setq desktop-dirname nil) + (if (file-exists-p filename) + (delete-file filename))))) +;; ---------------------------------------------------------------------------- +;;;###autoload +(defun desktop-read () + "Read the Desktop file and the files it specifies. +This is a no-op when Emacs is running in batch mode." + (interactive) + (if noninteractive + nil + (let ((dirs '("./" "~/"))) + (while (and dirs + (not (file-exists-p (expand-file-name + desktop-basefilename + (car dirs))))) + (setq dirs (cdr dirs))) + (setq desktop-dirname (and dirs (expand-file-name (car dirs)))) + (if desktop-dirname + (progn + (load (expand-file-name desktop-basefilename desktop-dirname) + t t t) + (run-hooks 'desktop-delay-hook) + (setq desktop-delay-hook nil) + (message "Desktop loaded.")) + (desktop-clear))))) +;; ---------------------------------------------------------------------------- +;;;###autoload +(defun desktop-load-default () + "Load the `default' start-up library manually. +Also inhibit further loading of it. Call this from your `.emacs' file +to provide correct modes for autoloaded files." + (if (not inhibit-default-init) ; safety check + (progn + (load "default" t t) + (setq inhibit-default-init t)))) +;; ---------------------------------------------------------------------------- +;; Note: the following functions use the dynamic variable binding in Lisp. +;; +(defun desktop-buffer-info () "Load an info file." + (if (eq 'Info-mode desktop-buffer-major-mode) + (progn + (require 'info) + (Info-find-node (nth 0 desktop-buffer-misc) (nth 1 desktop-buffer-misc)) + (current-buffer)))) +;; ---------------------------------------------------------------------------- +(defun desktop-buffer-rmail () "Load an RMAIL file." + (if (eq 'rmail-mode desktop-buffer-major-mode) + (condition-case error + (progn (rmail-input desktop-buffer-file-name) + (if (eq major-mode 'rmail-mode) + (current-buffer) + rmail-buffer)) + (file-locked + (kill-buffer (current-buffer)) + 'ignored)))) +;; ---------------------------------------------------------------------------- +(defun desktop-buffer-mh () "Load a folder in the mh system." + (if (eq 'mh-folder-mode desktop-buffer-major-mode) + (progn + (require 'mh-e) + (mh-find-path) + (mh-visit-folder desktop-buffer-name) + (current-buffer)))) +;; ---------------------------------------------------------------------------- +(defun desktop-buffer-dired () "Load a directory using dired." + (if (eq 'dired-mode desktop-buffer-major-mode) + (if (file-directory-p (file-name-directory (car desktop-buffer-misc))) + (progn + (dired (car desktop-buffer-misc)) + (mapcar 'dired-maybe-insert-subdir (cdr desktop-buffer-misc)) + (current-buffer)) + (message "Directory %s no longer exists." (car desktop-buffer-misc)) + (sit-for 1) + 'ignored))) +;; ---------------------------------------------------------------------------- +(defun desktop-buffer-file () "Load a file." + (if desktop-buffer-file-name + (if (or (file-exists-p desktop-buffer-file-name) + (and desktop-missing-file-warning + (y-or-n-p (format + "File \"%s\" no longer exists. Re-create? " + desktop-buffer-file-name)))) + (progn (find-file desktop-buffer-file-name) (current-buffer)) + 'ignored))) +;; ---------------------------------------------------------------------------- +;; Create a buffer, load its file, set is mode, ...; called from Desktop file +;; only. +(defun desktop-create-buffer (ver desktop-buffer-file-name desktop-buffer-name + desktop-buffer-major-mode + mim pt mk ro desktop-buffer-misc + &optional locals) + (let ((hlist desktop-buffer-handlers) + (result) + (handler)) + (while (and (not result) hlist) + (setq handler (car hlist)) + (setq result (funcall handler)) + (setq hlist (cdr hlist))) + (when (bufferp result) + (set-buffer result) + (if (not (equal (buffer-name) desktop-buffer-name)) + (rename-buffer desktop-buffer-name)) + ;; minor modes + (cond ((equal '(t) mim) (auto-fill-mode 1)) ; backwards compatible + ((equal '(nil) mim) (auto-fill-mode 0)) + (t (mapcar #'(lambda (minor-mode) + (when minor-mode (funcall minor-mode 1))) + mim))) + (goto-char pt) + (if (consp mk) + (progn + (set-mark (car mk)) + (setq mark-active (car (cdr mk)))) + (set-mark mk)) + ;; Never override file system if the file really is read-only marked. + (if ro (setq buffer-read-only ro)) + (while locals + (let ((this (car locals))) + (if (consp this) + ;; an entry of this form `(symbol . value)' + (progn + (make-local-variable (car this)) + (set (car this) (cdr this))) + ;; an entry of the form `symbol' + (make-local-variable this) + (makunbound this))) + (setq locals (cdr locals)))))) + +;; Backward compatibility -- update parameters to 205 standards. +(defun desktop-buffer (desktop-buffer-file-name desktop-buffer-name + desktop-buffer-major-mode + mim pt mk ro tl fc cfs cr desktop-buffer-misc) + (desktop-create-buffer 205 desktop-buffer-file-name desktop-buffer-name + desktop-buffer-major-mode (cdr mim) pt mk ro + desktop-buffer-misc + (list (cons 'truncate-lines tl) + (cons 'fill-column fc) + (cons 'case-fold-search cfs) + (cons 'case-replace cr) + (cons 'overwrite-mode (car mim))))) +;; ---------------------------------------------------------------------------- + +;; If the user set desktop-enable to t with Custom, +;; do the rest of what it takes to use desktop, +;; but do it after finishing loading the init file. +(add-hook 'after-init-hook + '(lambda () + (when desktop-enable + (desktop-load-default) + (desktop-read)))) + +(provide 'desktop) + +;; desktop.el ends here.