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New experimental feature to save&restore window and frame setup.

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* etc/NEWS: Document new Desktop option `desktop-save-windows'.

* lisp/desktop.el (desktop-save-windows): New defcustom.
  (desktop--saved-states): New var.
  (desktop--excluded-frame-parameters): New defconst.
  (desktop--filter-frame-parms, desktop--find-frame-in-display)
  (desktop--restore-windows, desktop--save-windows): New functions.
  (desktop-save): Call `desktop--save-windows'.
  (desktop-read): Call `desktop--restore-windows'.
This commit is contained in:
Juanma Barranquero 2013-06-27 11:08:14 +02:00
parent 7f13406b7a
commit 39c0e36f24
4 changed files with 98 additions and 0 deletions
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4
etc/ChangeLog
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@ -1,3 +1,7 @@
2013-06-27 Juanma Barranquero <lekktu@gmail.com>
* NEWS: Document new Desktop option `desktop-save-windows'.
2013-06-27 Stephen Berman <stephen.berman@gmx.net>
* NEWS: Mention new version of todo-mode.el and obsoleting and

3
etc/NEWS
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@ -237,6 +237,9 @@ on the given date.
*** `desktop-auto-save-timeout' defines the number of seconds between
auto-saves of the desktop.
*** `desktop-save-windows' enables saving and restoring the window/frame
configuration.
** Dired
*** New minor mode `dired-hide-details-mode' hides details.

11
lisp/ChangeLog
View file

@ -1,3 +1,14 @@
2013-06-27 Juanma Barranquero <lekktu@gmail.com>
New experimental feature to save&restore window and frame setup.
* desktop.el (desktop-save-windows): New defcustom.
(desktop--saved-states): New var.
(desktop--excluded-frame-parameters): New defconst.
(desktop--filter-frame-parms, desktop--find-frame-in-display)
(desktop--restore-windows, desktop--save-windows): New functions.
(desktop-save): Call `desktop--save-windows'.
(desktop-read): Call `desktop--restore-windows'.
2013-06-27 Lars Magne Ingebrigtsen <larsi@gnus.org>
* net/shr.el (add-face-text-property): Removed compat definition.

80
lisp/desktop.el
View file

@ -371,6 +371,12 @@ modes are restored automatically; they should not be listed here."
:type '(repeat symbol)
:group 'desktop)
(defcustom desktop-save-windows nil
"When non-nil, save window/frame configuration to desktop file."
:type 'boolean
:group 'desktop
:version "24.4")
(defcustom desktop-file-name-format 'absolute
"Format in which desktop file names should be saved.
Possible values are:
@ -556,6 +562,9 @@ DIRNAME omitted or nil means use `desktop-dirname'."
"Checksum of the last auto-saved contents of the desktop file.
Used to avoid writing contents unchanged between auto-saves.")
(defvar desktop--saved-states nil
"Internal use only.")
;; ----------------------------------------------------------------------------
;; Desktop file conflict detection
(defvar desktop-file-modtime nil
@ -858,6 +867,42 @@ DIRNAME must be the directory in which the desktop file will be saved."
;; ----------------------------------------------------------------------------
(defconst desktop--excluded-frame-parameters
'(buffer-list
buffer-predicate
buried-buffer-list
explicit-name
font-backend
minibuffer
name
outer-window-id
parent-id
window-id
window-system)
"Frame parameters not saved or restored.")
(defun desktop--filter-frame-parms (frame)
"Return frame parameters of FRAME.
Parameters in `desktop--excluded-frame-parameters' are excluded.
Internal use only."
(let (params)
(dolist (param (frame-parameters frame))
(unless (memq (car param) desktop--excluded-frame-parameters)
(push param params)))
params))
(defun desktop--save-windows ()
"Save window/frame state, as a global variable.
Intended to be called from `desktop-save'.
Internal use only."
(setq desktop--saved-states
(and desktop-save-windows
(mapcar (lambda (frame)
(cons (desktop--filter-frame-parms frame)
(window-state-get (frame-root-window frame) t)))
(frame-list))))
(desktop-outvar 'desktop--saved-states))
;;;###autoload
(defun desktop-save (dirname &optional release auto-save)
"Save the desktop in a desktop file.
@ -896,6 +941,9 @@ and don't save the buffer if they are the same."
(save-excursion (run-hooks 'desktop-save-hook))
(goto-char (point-max))
(insert "\n;; Global section:\n")
;; Called here because we save the window/frame state as a global
;; variable for compatibility with previous Emacsen.
(desktop--save-windows)
(mapc (function desktop-outvar) desktop-globals-to-save)
(when (memq 'kill-ring desktop-globals-to-save)
(insert
@ -954,6 +1002,37 @@ This function also sets `desktop-dirname' to nil."
(defvar desktop-lazy-timer nil)
;; ----------------------------------------------------------------------------
(defun desktop--find-frame-in-display (frames display)
(let (result)
(while (and frames (not result))
(if (equal display (frame-parameter (car frames) 'display))
(setq result (car frames))
(setq frames (cdr frames))))
result))
(defun desktop--restore-windows ()
"Restore window/frame configuration.
Internal use only."
(when (and desktop-save-windows desktop--saved-states)
(condition-case nil
(let ((frames (frame-list)))
(dolist (state desktop--saved-states)
(let* ((fconfig (car state))
(display (cdr (assq 'display fconfig)))
(frame (desktop--find-frame-in-display frames display)))
(if (not frame)
;; no frames in the display -- make a new one
(setq frame (make-frame-on-display display fconfig))
;; found one -- reuse and remove from list
(setq frames (delq frame frames))
(modify-frame-parameters frame fconfig))
;; restore windows
(window-state-put (cdr state) (frame-root-window frame) 'safe)))
;; delete any remaining frames
(mapc #'delete-frame frames))
(error
(message "Error loading window configuration from desktop file")))))
;;;###autoload
(defun desktop-read (&optional dirname)
"Read and process the desktop file in directory DIRNAME.
@ -1022,6 +1101,7 @@ Using it may cause conflicts. Use it anyway? " owner)))))
(switch-to-buffer (car (buffer-list)))
(run-hooks 'desktop-delay-hook)
(setq desktop-delay-hook nil)
(desktop--restore-windows)
(run-hooks 'desktop-after-read-hook)
(message "Desktop: %d buffer%s restored%s%s."
desktop-buffer-ok-count