(defvar desktop-file-version "206"
"Version number of desktop file format.
Written into the desktop file and used at desktop read to provide
backward compatibility.")
(defgroup desktop nil
"Save status of Emacs when you exit."
:group 'frames)
(define-minor-mode desktop-save-mode
"Toggle desktop saving mode.
With numeric ARG, turn desktop saving on if ARG is positive, off
otherwise. If desktop saving is turned on, the state of Emacs is
saved from one session to another. See variable `desktop-save'
and function `desktop-read' for details."
:global t
:group 'desktop)
(define-obsolete-variable-alias 'desktop-enable
'desktop-save-mode "22.1")
(defcustom desktop-save 'ask-if-new
"*Specifies whether the desktop should be saved when it is killed.
A desktop is killed when the user changes desktop or quits Emacs.
Possible values are:
t -- always save.
ask -- always ask.
ask-if-new -- ask if no desktop file exists, otherwise just save.
ask-if-exists -- ask if desktop file exists, otherwise don't save.
if-exists -- save if desktop file exists, otherwise don't save.
nil -- never save.
The desktop is never saved when `desktop-save-mode' is nil.
The variables `desktop-dirname' and `desktop-base-file-name'
determine where the desktop is saved."
:type
'(choice
(const :tag "Always save" t)
(const :tag "Always ask" ask)
(const :tag "Ask if desktop file is new, else do save" ask-if-new)
(const :tag "Ask if desktop file exists, else don't save" ask-if-exists)
(const :tag "Save if desktop file exists, else don't" if-exists)
(const :tag "Never save" nil))
:group 'desktop
:version "22.1")
(defcustom desktop-base-file-name
(convert-standard-filename ".emacs.desktop")
"Name of file for Emacs desktop, excluding the directory part."
:type 'file
:group 'desktop)
(define-obsolete-variable-alias 'desktop-basefilename
'desktop-base-file-name "22.1")
(defcustom desktop-path '("." "~")
"List of directories to search for the desktop file.
The base name of the file is specified in `desktop-base-file-name'."
:type '(repeat directory)
:group 'desktop
:version "22.1")
(defcustom desktop-missing-file-warning nil
"If non-nil, offer to recreate the buffer of a deleted file.
Also pause for a moment to display message about errors signaled in
`desktop-buffer-mode-handlers'.
If nil, just print error messages in the message buffer."
:type 'boolean
:group 'desktop
:version "22.1")
(defcustom desktop-no-desktop-file-hook nil
"Normal hook run when `desktop-read' can't find a desktop file.
Run in the directory in which the desktop file was sought.
May be used to show a dired buffer."
:type 'hook
:group 'desktop
:version "22.1")
(defcustom desktop-after-read-hook nil
"Normal hook run after a successful `desktop-read'.
May be used to show a buffer list."
:type 'hook
:group 'desktop
:options '(list-buffers)
:version "22.1")
(defcustom desktop-save-hook nil
"Normal hook run before the desktop is saved in a desktop file.
Run with the desktop buffer current with only the header present.
May be used to add to the desktop code or to truncate history lists,
for example."
:type 'hook
:group 'desktop)
(defcustom desktop-globals-to-save
'(desktop-missing-file-warning
tags-file-name
tags-table-list
search-ring
regexp-search-ring
register-alist)
"List of global variables saved by `desktop-save'.
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.
Feature: Saving `kill-ring' implies saving `kill-ring-yank-pointer'."
:type '(repeat (restricted-sexp :match-alternatives (symbolp consp)))
:group 'desktop)
(defcustom desktop-globals-to-clear
'(kill-ring
kill-ring-yank-pointer
search-ring
search-ring-yank-pointer
regexp-search-ring
regexp-search-ring-yank-pointer)
"List of global variables that `desktop-clear' will clear.
An element may be variable name (a symbol) or a cons cell of the form
\(VAR . FORM). Symbols are set to nil and for cons cells VAR is set
to the value obtained by evaluating FORM."
:type '(repeat (restricted-sexp :match-alternatives (symbolp consp)))
:group 'desktop
:version "22.1")
(defcustom desktop-clear-preserve-buffers
'("\\*scratch\\*" "\\*Messages\\*" "\\*server\\*" "\\*tramp/.+\\*")
"*List of buffers that `desktop-clear' should not delete.
Each element is a regular expression. Buffers with a name matched by any of
these won't be deleted."
:type '(repeat string)
:group 'desktop)
(defcustom desktop-locals-to-save
'(desktop-locals-to-save truncate-lines
case-fold-search
case-replace
fill-column
overwrite-mode
change-log-default-name
line-number-mode
column-number-mode
size-indication-mode
buffer-file-coding-system
indent-tabs-mode
tab-width
indicate-buffer-boundaries
indicate-empty-lines
show-trailing-whitespace)
"List of local variables to save for each buffer.
The variables are saved only when they really are local. Conventional minor
modes are restored automatically; they should not be listed here."
:type '(repeat symbol)
:group 'desktop)
(defcustom desktop-buffers-not-to-save
"\\(^nn\\.a[0-9]+\\|\\.log\\|(ftp)\\)$"
"Regexp identifying buffers that are to be excluded from saving."
:type 'regexp
:group 'desktop)
(defcustom desktop-files-not-to-save
"^/[^/:]*:"
"Regexp identifying files whose buffers are to be excluded from saving."
:type 'regexp
:group 'desktop)
(defcustom desktop-modes-not-to-save
'(tags-table-mode)
"List of major modes whose buffers should not be saved."
:type '(repeat symbol)
:group 'desktop)
(defcustom desktop-file-name-format 'absolute
"*Format in which desktop file names should be saved.
Possible values are:
absolute -- Absolute file name.
tilde -- Relative to ~.
local -- Relative to directory of desktop file."
:type '(choice (const absolute) (const tilde) (const local))
:group 'desktop
:version "22.1")
(defcustom desktop-restore-eager t
"Number of buffers to restore immediately.
Remaining buffers are restored lazily (when Emacs is idle).
If value is t, all buffers are restored immediately."
:type '(choice (const t) integer)
:group 'desktop
:version "22.1")
(defcustom desktop-lazy-verbose t
"Verbose reporting of lazily created buffers."
:type 'boolean
:group 'desktop
:version "22.1")
(defcustom desktop-lazy-idle-delay 5
"Idle delay before starting to create buffers.
See `desktop-restore-eager'."
:type 'integer
:group 'desktop
:version "22.1")
(defvar desktop-save-buffer nil
"When non-nil, save buffer status in desktop file.
This variable becomes buffer local when set.
If the value is a function, it is called by `desktop-save' with argument
DESKTOP-DIRNAME to obtain auxiliary information to save in the desktop
file along with the state of the buffer for which it was called.
When file names are returned, they should be formatted using the call
\"(desktop-file-name FILE-NAME DESKTOP-DIRNAME)\".
Later, when `desktop-read' evaluates the desktop file, auxiliary information
is passed as the argument DESKTOP-BUFFER-MISC to functions in
`desktop-buffer-mode-handlers'.")
(make-variable-buffer-local 'desktop-save-buffer)
(make-obsolete-variable 'desktop-buffer-modes-to-save
'desktop-save-buffer "22.1")
(make-obsolete-variable 'desktop-buffer-misc-functions
'desktop-save-buffer "22.1")
(defvar desktop-buffer-mode-handlers
nil
"Alist of major mode specific functions to restore a desktop buffer.
Functions listed are called by `desktop-create-buffer' when `desktop-read'
evaluates the desktop file. List elements must have the form
(MAJOR-MODE . RESTORE-BUFFER-FUNCTION).
Buffers with a major mode not specified here, are restored by the default
handler `desktop-restore-file-buffer'.
Handlers are called with argument list
(DESKTOP-BUFFER-FILE-NAME DESKTOP-BUFFER-NAME DESKTOP-BUFFER-MISC)
Furthermore, they may use the following variables:
desktop-file-version
desktop-buffer-major-mode
desktop-buffer-minor-modes
desktop-buffer-point
desktop-buffer-mark
desktop-buffer-read-only
desktop-buffer-locals
If a handler returns a buffer, then the saved mode settings
and variable values for that buffer are copied into it.
Modules that define a major mode that needs a special handler should contain
code like
(defun foo-restore-desktop-buffer
...
(add-to-list 'desktop-buffer-mode-handlers
'(foo-mode . foo-restore-desktop-buffer))
Furthermore the major mode function must be autoloaded.")
(put 'desktop-buffer-mode-handlers 'risky-local-variable t)
(make-obsolete-variable 'desktop-buffer-handlers
'desktop-buffer-mode-handlers "22.1")
(defcustom desktop-minor-mode-table
'((auto-fill-function auto-fill-mode)
(vc-mode nil)
(vc-dired-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 be added to
this table. See also `desktop-minor-mode-handlers'."
:type 'sexp
:group 'desktop)
(defvar desktop-minor-mode-handlers
nil
"Alist of functions to restore non-standard minor modes.
Functions are called by `desktop-create-buffer' to restore minor modes.
List elements must have the form
(MINOR-MODE . RESTORE-FUNCTION).
Minor modes not specified here, are restored by the standard minor mode
function.
Handlers are called with argument list
(DESKTOP-BUFFER-LOCALS)
Furthermore, they may use the following variables:
desktop-file-version
desktop-buffer-file-name
desktop-buffer-name
desktop-buffer-major-mode
desktop-buffer-minor-modes
desktop-buffer-point
desktop-buffer-mark
desktop-buffer-read-only
desktop-buffer-misc
When a handler is called, the buffer has been created and the major mode has
been set, but local variables listed in desktop-buffer-locals has not yet been
created and set.
Modules that define a minor mode that needs a special handler should contain
code like
(defun foo-desktop-restore
...
(add-to-list 'desktop-minor-mode-handlers
'(foo-mode . foo-desktop-restore))
Furthermore the minor mode function must be autoloaded.
See also `desktop-minor-mode-table'.")
(put 'desktop-minor-mode-handlers 'risky-local-variable t)
(defvar desktop-dirname nil
"The directory in which the desktop file should be saved.")
(defun desktop-full-file-name (&optional dirname)
"Return the full name of the desktop file in DIRNAME.
DIRNAME omitted or nil means use `desktop-dirname'."
(expand-file-name desktop-base-file-name (or dirname desktop-dirname)))
(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 (list n)
"Truncate LIST to at most N elements destructively."
(let ((here (nthcdr (1- n) list)))
(if (consp here)
(setcdr here nil))))
(defun desktop-clear ()
"Empty the Desktop.
This kills all buffers except for internal ones and those with names matched by
a regular expression in the list `desktop-clear-preserve-buffers'.
Furthermore, it clears the variables listed in `desktop-globals-to-clear'."
(interactive)
(desktop-lazy-abort)
(dolist (var desktop-globals-to-clear)
(if (symbolp var)
(eval `(setq-default ,var nil))
(eval `(setq-default ,(car var) ,(cdr var)))))
(let ((buffers (buffer-list))
(preserve-regexp (concat "^\\("
(mapconcat (lambda (regexp)
(concat "\\(" regexp "\\)"))
desktop-clear-preserve-buffers
"\\|")
"\\)$")))
(while buffers
(let ((bufname (buffer-name (car buffers))))
(or
(null bufname)
(string-match preserve-regexp bufname)
(and (not (equal bufname "")) (eq (aref bufname 0) ?\s))
(kill-buffer (car buffers))))
(setq buffers (cdr buffers))))
(delete-other-windows))
(add-hook 'kill-emacs-hook 'desktop-kill)
(defun desktop-kill ()
"If `desktop-save-mode' is non-nil, do what `desktop-save' says to do.
If the desktop should be saved and `desktop-dirname'
is nil, ask the user where to save the desktop."
(when (and desktop-save-mode
(let ((exists (file-exists-p (desktop-full-file-name))))
(or (eq desktop-save t)
(and exists (memq desktop-save '(ask-if-new if-exists)))
(and
(or (memq desktop-save '(ask ask-if-new))
(and exists (eq desktop-save 'ask-if-exists)))
(y-or-n-p "Save desktop? ")))))
(unless desktop-dirname
(setq desktop-dirname
(file-name-as-directory
(expand-file-name
(call-interactively
(lambda (dir)
(interactive "DDirectory for desktop file: ") dir))))))
(condition-case err
(desktop-save desktop-dirname)
(file-error
(unless (yes-or-no-p "Error while saving the desktop. Ignore? ")
(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 (value)
"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 value) (null value) (eq t value) (keywordp value))
(cons 'may (prin1-to-string value)))
((stringp value)
(let ((copy (copy-sequence value)))
(set-text-properties 0 (length copy) nil copy)
(cons 'may (prin1-to-string copy))))
((symbolp value)
(cons 'must (prin1-to-string value)))
((vectorp value)
(let* ((special nil)
(pass1 (mapcar
(lambda (el)
(let ((res (desktop-internal-v2s el)))
(if (null (car res))
(setq special t))
res))
value)))
(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 value)
(let ((p value)
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)))
(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 value)
(cons nil (concat "(symbol-function '"
(substring (prin1-to-string value) 7 -1)
")")))
((markerp value)
(let ((pos (prin1-to-string (marker-position value)))
(buf (prin1-to-string (buffer-name (marker-buffer value)))))
(cons nil (concat "(let ((mk (make-marker)))"
" (add-hook 'desktop-delay-hook"
" (list 'lambda '() (list 'set-marker mk "
pos " (get-buffer " buf ")))) mk)"))))
(t (cons 'may "\"Unprintable entity\""))))
(defun desktop-value-to-string (value)
"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 value))
(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 buffer should have its state saved in the desktop file.
FILENAME is the visited file name, BUFNAME is the buffer name, and
MODE is the major mode.
\n\(fn FILENAME BUFNAME MODE)"
(let ((case-fold-search nil))
(and (not (string-match desktop-buffers-not-to-save bufname))
(not (memq mode desktop-modes-not-to-save))
(or (and filename
(not (string-match desktop-files-not-to-save filename)))
(and (eq mode 'dired-mode)
(with-current-buffer bufname
(not (string-match desktop-files-not-to-save
default-directory))))
(and (null filename)
(with-current-buffer bufname desktop-save-buffer))))))
(defun desktop-file-name (filename dirname)
"Convert FILENAME to format specified in `desktop-file-name-format'.
DIRNAME must be the directory in which the desktop file will be saved."
(cond
((not filename) nil)
((eq desktop-file-name-format 'tilde)
(let ((relative-name (file-relative-name (expand-file-name filename) "~")))
(cond
((file-name-absolute-p relative-name) relative-name)
((string= "./" relative-name) "~/")
((string= "." relative-name) "~")
(t (concat "~/" relative-name)))))
((eq desktop-file-name-format 'local) (file-relative-name filename dirname))
(t (expand-file-name filename))))
(defun desktop-save (dirname)
"Save the desktop in a desktop file.
Parameter DIRNAME specifies where to save the desktop file.
See also `desktop-base-file-name'."
(interactive "DDirectory to save desktop file in: ")
(run-hooks 'desktop-save-hook)
(setq dirname (file-name-as-directory (expand-file-name dirname)))
(save-excursion
(let ((filename (desktop-full-file-name dirname))
(info
(mapcar
#'(lambda (b)
(set-buffer b)
(list
(desktop-file-name (buffer-file-name) dirname)
(buffer-name)
major-mode
(let (ret)
(mapc
#'(lambda (minor-mode)
(and
(boundp minor-mode)
(symbol-value minor-mode)
(let* ((special (assq minor-mode desktop-minor-mode-table))
(value (cond (special (cadr special))
((functionp minor-mode) minor-mode))))
(when value (add-to-list 'ret value)))))
(mapcar #'car minor-mode-alist))
ret)
(point)
(list (mark t) mark-active)
buffer-read-only
(when (functionp desktop-save-buffer)
(funcall desktop-save-buffer dirname))
(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))
(when (member (car locals) loclist)
(setq ll (cons (car locals) ll)))))
(setq locals (cdr locals)))
ll)))
(buffer-list)))
(eager desktop-restore-eager))
(with-temp-buffer
(insert
";; -*- mode: emacs-lisp; coding: emacs-mule; -*-\n"
desktop-header
";; Created " (current-time-string) "\n"
";; Desktop file format version " desktop-file-version "\n"
";; Emacs version " emacs-version "\n\n"
";; Global section:\n")
(dolist (varspec desktop-globals-to-save)
(desktop-outvar varspec))
(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 -- buffers listed in same order as in buffer list:\n")
(dolist (l info)
(when (apply 'desktop-save-buffer-p l)
(insert "("
(if (or (not (integerp eager))
(unless (zerop eager)
(setq eager (1- eager))
t))
"desktop-create-buffer"
"desktop-append-buffer-args")
" "
desktop-file-version)
(dolist (e l)
(insert "\n " (desktop-value-to-string e)))
(insert ")\n\n")))
(setq default-directory dirname)
(let ((coding-system-for-write 'emacs-mule))
(write-region (point-min) (point-max) filename nil 'nomessage)))))
(setq desktop-dirname dirname))
(defun desktop-remove ()
"Delete desktop file in `desktop-dirname'.
This function also sets `desktop-dirname' to nil."
(interactive)
(when desktop-dirname
(let ((filename (desktop-full-file-name)))
(setq desktop-dirname nil)
(when (file-exists-p filename)
(delete-file filename)))))
(defvar desktop-buffer-args-list nil
"List of args for `desktop-create-buffer'.")
(defvar desktop-lazy-timer nil)
(defun desktop-read (&optional dirname)
"Read and process the desktop file in directory DIRNAME.
Look for a desktop file in DIRNAME, or if DIRNAME is omitted, look in
directories listed in `desktop-path'. If a desktop file is found, it
is processed and `desktop-after-read-hook' is run. If no desktop file
is found, clear the desktop and run `desktop-no-desktop-file-hook'.
This function is a no-op when Emacs is running in batch mode.
It returns t if a desktop file was loaded, nil otherwise."
(interactive)
(unless noninteractive
(setq desktop-dirname
(file-name-as-directory
(expand-file-name
(or
(and (< 0 (length dirname)) dirname)
(let ((dirs desktop-path))
(while (and dirs
(not (file-exists-p
(desktop-full-file-name (car dirs)))))
(setq dirs (cdr dirs)))
(and dirs (car dirs)))
(and desktop-path (car desktop-path))
"~"))))
(if (file-exists-p (desktop-full-file-name))
(let ((desktop-first-buffer nil)
(desktop-buffer-ok-count 0)
(desktop-buffer-fail-count 0)
(desktop-save nil))
(desktop-lazy-abort)
(load (desktop-full-file-name) t t t)
(mapc 'bury-buffer
(nreverse (cdr (memq desktop-first-buffer (nreverse (buffer-list))))))
(switch-to-buffer (car (buffer-list)))
(run-hooks 'desktop-delay-hook)
(setq desktop-delay-hook nil)
(run-hooks 'desktop-after-read-hook)
(message "Desktop: %d buffer%s restored%s%s."
desktop-buffer-ok-count
(if (= 1 desktop-buffer-ok-count) "" "s")
(if (< 0 desktop-buffer-fail-count)
(format ", %d failed to restore" desktop-buffer-fail-count)
"")
(if desktop-buffer-args-list
(format ", %d to restore lazily"
(length desktop-buffer-args-list))
""))
t)
(desktop-clear)
(let ((default-directory desktop-dirname))
(run-hooks 'desktop-no-desktop-file-hook))
(message "No desktop file.")
nil)))
(defun desktop-load-default ()
"Load the `default' start-up library manually.
Also inhibit further loading of it."
(unless inhibit-default-init (load "default" t t)
(setq inhibit-default-init t)))
(make-obsolete 'desktop-load-default
'desktop-save-mode "22.1")
(defun desktop-change-dir (dirname)
"Change to desktop saved in DIRNAME.
Kill the desktop as specified by variables `desktop-save-mode' and
`desktop-save', then clear the desktop and load the desktop file in
directory DIRNAME."
(interactive "DChange to directory: ")
(setq dirname (file-name-as-directory (expand-file-name dirname desktop-dirname)))
(desktop-kill)
(desktop-clear)
(desktop-read dirname))
(defun desktop-save-in-desktop-dir ()
"Save the desktop in directory `desktop-dirname'."
(interactive)
(if desktop-dirname
(desktop-save desktop-dirname)
(call-interactively 'desktop-save))
(message "Desktop saved in %s" desktop-dirname))
(defun desktop-revert ()
"Revert to the last loaded desktop."
(interactive)
(unless desktop-dirname
(error "Unknown desktop directory"))
(unless (file-exists-p (desktop-full-file-name))
(error "No desktop file found"))
(desktop-clear)
(desktop-read desktop-dirname))
(defvar desktop-buffer-major-mode)
(defvar desktop-buffer-locals)
(defun desktop-restore-file-buffer (desktop-buffer-file-name
desktop-buffer-name
desktop-buffer-misc)
"Restore a file buffer."
(if desktop-buffer-file-name
(if (or (file-exists-p desktop-buffer-file-name)
(let ((msg (format "Desktop: File \"%s\" no longer exists."
desktop-buffer-file-name)))
(if desktop-missing-file-warning
(y-or-n-p (concat msg " Re-create buffer? "))
(message "%s" msg)
nil)))
(let* ((auto-insert nil) (coding-system-for-read
(or coding-system-for-read
(cdr (assq 'buffer-file-coding-system
desktop-buffer-locals))))
(buf (find-file-noselect desktop-buffer-file-name)))
(condition-case nil
(switch-to-buffer buf)
(error (pop-to-buffer buf)))
(and (not (eq major-mode desktop-buffer-major-mode))
(functionp desktop-buffer-major-mode)
(funcall desktop-buffer-major-mode))
buf)
nil)))
(defun desktop-load-file (function)
"Load the file where auto loaded FUNCTION is defined."
(when function
(let ((fcell (and (fboundp function) (symbol-function function))))
(when (and (listp fcell)
(eq 'autoload (car fcell)))
(load (cadr fcell))))))
(defvar desktop-first-buffer)
(defvar desktop-buffer-ok-count)
(defvar desktop-buffer-fail-count)
(defun desktop-create-buffer
(desktop-file-version
desktop-buffer-file-name
desktop-buffer-name
desktop-buffer-major-mode
desktop-buffer-minor-modes
desktop-buffer-point
desktop-buffer-mark
desktop-buffer-read-only
desktop-buffer-misc
&optional
desktop-buffer-locals)
(save-current-buffer
(desktop-load-file desktop-buffer-major-mode)
(let ((buffer-list (buffer-list))
(result
(condition-case err
(funcall (or (cdr (assq desktop-buffer-major-mode
desktop-buffer-mode-handlers))
'desktop-restore-file-buffer)
desktop-buffer-file-name
desktop-buffer-name
desktop-buffer-misc)
(error
(message "Desktop: Can't load buffer %s: %s"
desktop-buffer-name
(error-message-string err))
(when desktop-missing-file-warning (sit-for 1))
nil))))
(if (bufferp result)
(setq desktop-buffer-ok-count (1+ desktop-buffer-ok-count))
(setq desktop-buffer-fail-count (1+ desktop-buffer-fail-count))
(setq result nil))
(unless (< desktop-file-version 206)
(mapc 'bury-buffer buffer-list)
(when result (bury-buffer result)))
(when result
(unless (or desktop-first-buffer (< desktop-file-version 206))
(setq desktop-first-buffer result))
(set-buffer result)
(unless (equal (buffer-name) desktop-buffer-name)
(rename-buffer desktop-buffer-name))
(cond ((equal '(t) desktop-buffer-minor-modes) (auto-fill-mode 1))
((equal '(nil) desktop-buffer-minor-modes) (auto-fill-mode 0))
(t
(dolist (minor-mode desktop-buffer-minor-modes)
(desktop-load-file minor-mode)
(let ((handler (cdr (assq minor-mode desktop-minor-mode-handlers))))
(if handler
(funcall handler desktop-buffer-locals)
(when (functionp minor-mode)
(funcall minor-mode 1)))))))
(when desktop-buffer-point
(goto-char
(condition-case err
(eval desktop-buffer-point)
(error (message "%s" (error-message-string err)) 1))))
(when desktop-buffer-mark
(if (consp desktop-buffer-mark)
(progn
(set-mark (car desktop-buffer-mark))
(setq mark-active (car (cdr desktop-buffer-mark))))
(set-mark desktop-buffer-mark)))
(if desktop-buffer-read-only (setq buffer-read-only desktop-buffer-read-only))
(while desktop-buffer-locals
(let ((this (car desktop-buffer-locals)))
(if (consp this)
(progn
(make-local-variable (car this))
(set (car this) (cdr this)))
(make-local-variable this)
(makunbound this)))
(setq desktop-buffer-locals (cdr desktop-buffer-locals)))))))
(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)))))
(defun desktop-append-buffer-args (&rest args)
"Append ARGS at end of `desktop-buffer-args-list'.
ARGS must be an argument list for `desktop-create-buffer'."
(setq desktop-buffer-args-list (nconc desktop-buffer-args-list (list args)))
(unless desktop-lazy-timer
(setq desktop-lazy-timer
(run-with-idle-timer desktop-lazy-idle-delay t 'desktop-idle-create-buffers))))
(defun desktop-lazy-create-buffer ()
"Pop args from `desktop-buffer-args-list', create buffer and bury it."
(when desktop-buffer-args-list
(let* ((remaining (length desktop-buffer-args-list))
(args (pop desktop-buffer-args-list))
(buffer-name (nth 2 args))
(msg (format "Desktop lazily opening %s (%s remaining)..."
buffer-name remaining)))
(when desktop-lazy-verbose
(message "%s" msg))
(let ((desktop-first-buffer nil)
(desktop-buffer-ok-count 0)
(desktop-buffer-fail-count 0))
(apply 'desktop-create-buffer args)
(run-hooks 'desktop-delay-hook)
(setq desktop-delay-hook nil)
(bury-buffer (get-buffer buffer-name))
(when desktop-lazy-verbose
(message "%s%s" msg (if (> desktop-buffer-ok-count 0) "done" "failed")))))))
(defun desktop-idle-create-buffers ()
"Create buffers until the user does something, then stop.
If there are no buffers left to create, kill the timer."
(let ((repeat 1))
(while (and repeat desktop-buffer-args-list)
(save-window-excursion
(desktop-lazy-create-buffer))
(setq repeat (sit-for 0.2))
(unless desktop-buffer-args-list
(cancel-timer desktop-lazy-timer)
(setq desktop-lazy-timer nil)
(message "Lazy desktop load complete")
(sit-for 3)
(message "")))))
(defun desktop-lazy-complete ()
"Run the desktop load to completion."
(interactive)
(let ((desktop-lazy-verbose t))
(while desktop-buffer-args-list
(save-window-excursion
(desktop-lazy-create-buffer)))
(message "Lazy desktop load complete")))
(defun desktop-lazy-abort ()
"Abort lazy loading of the desktop."
(interactive)
(when desktop-lazy-timer
(cancel-timer desktop-lazy-timer)
(setq desktop-lazy-timer nil))
(when desktop-buffer-args-list
(setq desktop-buffer-args-list nil)
(when (interactive-p)
(message "Lazy desktop load aborted"))))
(add-hook
'after-init-hook
(lambda ()
(let ((key "--no-desktop"))
(when (member key command-line-args)
(setq command-line-args (delete key command-line-args))
(setq desktop-save-mode nil)))
(when desktop-save-mode (desktop-read))))
(provide 'desktop)