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- ;;; desktop.el --- save partial status of Emacs when killed
-
- ;; Copyright (C) 1993 Free Software Foundation, Inc.
-
- ;; Author: Morten Welinder <terra@diku.dk>
- ;; Version: 2.02
-
- ;; 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 & mark-active
- ;; - 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: 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.
- ;; ---------------------------------------------------------------------------
- ;; 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
- ;; Feature: saving kill-ring implies saving kill-ring-yank-pointer
- ;; 'kill-ring
- 'tags-file-name
- 'tags-table-list
- ;; 'desktop-globals-to-save ; Itself!
- )
- "List of global variables to save when killing Emacs.")
-
- ;; We skip .log files because they are normally temporary.
- ;; (ftp) files because they require passwords and whatsnot.
- ;; TAGS files to save time (tags-file-name is saved instead).
- (defvar desktop-buffers-not-to-save
- "\\(\\.log\\|(ftp)\\|^tags\\|^TAGS\\)$"
- "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 explicit 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 if 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)))
- ;; ----------------------------------------------------------------------------
- ;; This is a bit dirty for version 18 because that version of Emacs was not
- ;; toilet-trained considering hooks.
- (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)
- (if (or (null old-kill-emacs)
- (symbolp old-kill-emacs))
- (run-hooks old-kill-emacs)
- (funcall old-kill-emacs))))))))
- ;; ----------------------------------------------------------------------------
- (defun desktop-kill ()
- (if desktop-dirname
- (progn
- (desktop-save desktop-dirname))))
- ;; ----------------------------------------------------------------------------
- (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
- (list 'quote (mark t) mark-active)
- (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)
- (if postv18
- (nreverse
- (mapcar
- (function car)
- dired-subdir-alist))
- (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 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.
- ;; The byte compiler may therefore complain of undeclared variables.
- ;;
- (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 (car misc))
- (mapcar (function dired-maybe-insert-subdir) (cdr 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)
- (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))
- (setq truncate-lines tl)
- (setq fill-column fc)
- (setq case-fold-search cfs)
- (setq case-replace cr)
- ))))
- ;; ----------------------------------------------------------------------------
- (provide 'desktop)
-
- ;; desktop.el ends here.
-
-