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;;; revive.el --- Resume Emacs -*- coding: euc-jp -*-
;;; (c) 1994-2012 by HIROSE Yuuji [yuuji@gentei.org]
;;; $Id: revive.el,v 2.21 2012/08/12 11:56:06 yuuji Exp yuuji $
;;; Last modified Thu Oct 18 14:47:17 2012 on firestorm

;;;[[[   NOTICE Ãí°Õ NOTICE Ãí°Õ NOTICE Ãí°Õ NOTICE Ãí°Õ NOTICE Ãí°Õ   ]]]
;;;--------------------------------------------------------------------------
;;;	If you are using `windows.el', you can omit the settings of
;;;	define-key and autoload.
;;;	windows.el¤òÉáÃʻȤäƤ¤¤ë¾ì¹ç¤Ï revive.el ¤Î¤¿¤á¤Î¥­¡¼¤Î³ä¤êÅö
;;;	¤Æ¤âautoload¤ÎÀßÄê¤â¤¹¤ëɬÍפ¬¤¢¤ê¤Þ¤»¤ó¡£
;;;--------------------------------------------------------------------------
;;;
;;; Commentary:
;;;
;;;		Resume Emacs:		revive.el
;;;
;;;[What is `revive'?]
;;;
;;;	  Revive.el  saves current editing  status including  the window
;;;	splitting   configuration,   which   can't   be   recovered   by
;;;	`desktop.el' nor by `saveconf.el', into a file  and reconstructs
;;;	that status correctly.
;;;
;;;[Installation]
;;;
;;;	  Put revive.el into your elisp  directory included in load-path
;;;	and write the next expressions.
;;;
;;;	  (autoload 'save-current-configuration "revive" "Save status" t)
;;;	  (autoload 'resume "revive" "Resume Emacs" t)
;;;	  (autoload 'wipe "revive" "Wipe Emacs" t)
;;;
;;;	And define favorite keys to those functions.  Here is a sample.
;;;
;;;	  (define-key ctl-x-map "S" 'save-current-configuration)
;;;	  (define-key ctl-x-map "F" 'resume)
;;;	  (define-key ctl-x-map "K" 'wipe)
;;;
;;;[How to use]
;;;
;;;	 Call `save-current-configuration' (`C-x S' if you define key as
;;;	above) when  you want to   save current editing status  and call
;;;	`resume' to restore it.  Numerical prefix  arg to them specifies
;;;	the buffer number in which the editing status will be saved.
;;;
;;;		[Sample Operations]
;;;		C-u 2 C-x S		;save status into the buffer #2
;;;		C-u 3 C-x F		;load status from the buffer #3
;;;
;;;[Save Variables]
;;;
;;;	  Revive.el can save global or local variables.  The default
;;;	variables to be saved are in revive:save-variables-global-default
;;;	and revive:save-variables-local-default.  If you want to save other
;;;	global/local variables, define them in
;;;	revive:save-variables-global-private or
;;;	revive:save-variables-local-private in a form of a list.  If you
;;;	are using `gmhist', the next expression in ~/.emacs is useful.
;;;
;;;		(setq revive:save-variables-global-private
;;;		      '(file-history buffer-history minibuffer-history))
;;;
;;;[Restoring abnormal buffers]
;;;
;;;	  The variable revive:major-mode-command-alist-default holds the
;;;	list of  major-mode  name  vs.   command  name.   For  example,
;;;	mh-rmail  command sees the directory ~/Mail/inbox/ and sets  the
;;;	major-mode  to  'mh-folder-mode.   And  gnus  command  sets  the
;;;	major-mode to  'gnus-Group-mode.   If  you want to define  other
;;;	relations between major-mode and command,  set the user variable
;;;	revive:major-mode-command-alist-private as follows:
;;;
;;;		(setq revive:major-mode-command-alist-private
;;;		  '((your-own-mode	. your-own)
;;;		    (foo-mode		. foo)
;;;		    ("*Hanoi*"		. hanoi)
;;;
;;;	it tells revive.el to execute the corresponding command when the
;;;	saved configuration has the buffer with that major-mode. To know
;;;	the major-mode of a certain buffer, type `M-ESC' and `major-mode
;;;	CR'.   And as  you  see above, buffer-name  string  can be  used
;;;	instead of major-mode symbol.
;;;
;;;	  For  other  special modes that  cannot be resumed by executing
;;;	certain function,  define a function to resume and declare it in
;;;	the  variable revive:major-mode-command-alist-private.  In  that
;;;	function, the following values are available.
;;;
;;;		(revive:prop-file-name x)	;file name
;;;		(revive:prop-buffer-name x)	;buffer name
;;;		(revive:prop-major-mode x)	;major-mode
;;;		(revive:prop-point x)		;(point)
;;;		(revive:prop-mark x)		;(mark)
;;;		(revive:prop-varlist x)		;alist of pairs of (var . val)
;;;
;;;[For programmers]
;;;
;;;	  This program provides two powerful functions:
;;;
;;;		* current-window-configuration-printable
;;;		* restore-window-configuration
;;;
;;;	When you want to save a screen your program manages into a file,
;;;	and  restore  it,  save  the  return  value  of  current-window-
;;;	configuration-printable, and read and give it to restore-window-
;;;	configuration.
;;;
;;;	*Sample*
;;;	;;To save
;;;	(insert (prin1-to-string (current-window-configuration-printable)))
;;;	;;To restore
;;;	(restore-window-configuration (read (current-buffer)))
;;;
;;;	Since set-window-configuration cannot set the configuration of
;;;	other frame, the program as below should be useful.
;;;
;;;	*Sample*
;;;	(defun frame-copy-configuration (nth)
;;;	  "Copy confinguration of current frame to NTH next frame."
;;;	  (let ((config (current-window-configuration-printable)))
;;;	    (other-frame nth)
;;;	    (restore-window-configuration config)))
;;;
;;;[Copying]
;;;
;;;	  This program is distributed as a free  software. The author is
;;;	not responsible  for  any  possible   defects   caused  by  this
;;;	software.
;;;
;;;	  Comments  and bug   reports  are welcome. Don't  hesitated  to
;;;	report.  My possible e-mail address is following.
;;;
;;;							yuuji@gentei.org
;;;
;;; Japanese Document follows:
;;;
;;;¡Úrevive¤È¤Ï¡Û
;;;
;;;	  revive.el ¤ò»È¤¦¤È¡¢Emacs »ÈÍÑ»þ¤Î¾õÂÖ¤ò¥Õ¥¡¥¤¥ë¤Ë¥»¡¼¥Ö¤·¤Æ¡¢
;;;	¼¡²ó Emacs ¤òµ¯Æ°¤¹¤ë»þ¤Ë¤½¤Î¾õÂÖ¤ËÉüµ¢¤¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£¤â¤Á
;;;	¤í¤ó¥¦¥£¥ó¥É¥¦¤Îʬ³ä¾õÂÖ¤âÉü¸µ¤µ¤ì¤ë¤Î¤Ç saveconf ¤ä desktop ¤Ç
;;;	¤¤¤é¤¤¤é¤·¤Æ¤¤¤¿¿Í¤Ë¤â¤ª´«¤á¤Ç¤¹¡£
;;;
;;;¡ÚÁȤ߹þ¤ßÊý¡Û
;;;
;;;	  revive.el ¤ò load-path ¤ÎÄ̤俥ǥ£¥ì¥¯¥È¥ê¤ËÆþ¤ì¡¢~/.emacs ¤Ë
;;;	°Ê²¼¤Îµ­½Ò¤òÆþ¤ì¤Æ¤¯¤À¤µ¤¤¡£
;;;
;;;	  (autoload 'save-current-configuration "revive" "Save status" t)
;;;	  (autoload 'resume "revive" "Resume Emacs" t)
;;;	  (autoload 'wipe "revive" "Wipe emacs" t)
;;;
;;;	¤½¤·¤Æ¾å¤Î´Ø¿ô¤ò¹¥¤­¤Ê¥­¡¼¤Ë³ä¤êÅö¤Æ¤Æ¤¯¤À¤µ¤¤¡£°Ê²¼¤ÏÎã¤Ç¤¹¡£
;;;
;;;	  (define-key ctl-x-map "S" 'save-current-configuration)
;;;	  (define-key ctl-x-map "F" 'resume)
;;;	  (define-key ctl-x-map "K" 'wipe)
;;;
;;;¡Ú»È¤¤Êý¡Û
;;;
;;;	  ¾å¤Î define-key ¤ò¤·¤¿¾ì¹ç¤Ë¤Ï¡¢C-x S ¤Ç¸½ºß¤ÎÊÔ½¸¾õÂÖ¤ò¥»¡¼¥Ö
;;;	¤¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£save-current-configuration ´Ø¿ô¤Ë¿ô°ú¿ô¤ò¤Ä
;;;	¤±¤ë¤ÈÊ£¿ô¤Î¾õÂÖ¤òÊÌ¡¹¤Ë¥»¡¼¥Ö¤Ç¤­¤Þ¤¹¡£¡ÖC-u 2 C-x S¡×¤È¤¹¤ë¤È2
;;;	È֤ΥХåե¡¤Ë¸½¾õ¤ò¥»¡¼¥Ö¤Ç¤­¤Þ¤¹¡£¤³¤ì¤ò¥í¡¼¥É¤¹¤ë»þ¤âƱÍͤË
;;;	¡ÖC-u 2 C-x F¡×¤È¥¿¥¤¥×¤¹¤ë¤È2È֤ΥХåե¡¤«¤é¾õÂÖ¤ò¥í¡¼¥É¤·¤Þ¤¹¡£
;;;
;;;¡ÚÊÑ¿ô¤Î¥»¡¼¥Ö¡Û
;;;
;;;	  ÊÑ¿ô¤ÎÃͤ⥻¡¼¥Ö¤·¤Æ¤ª¤¯¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£¥Ç¥Õ¥©¥ë¥È¤Ç¥»¡¼¥Ö¤¹¤ë
;;;	global ÊÑ¿ô¤Ï revive:save-variables-global-default ¤Ë¡¢local ÊÑ
;;;	¿ô¤Ï revive:save-variables-local-default ¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤Þ¤¹¡£¤Û
;;;	¤«¤ÎÊÑ¿ô¤âÊݸ¤·¤¿¤¤¾ì¹ç¤Ï¡¢revive:save-variables-global-private
;;;	¤Ë global ÊÑ¿ô̾¤ò¡¢revive:save-variables-local-private ¤Ë local
;;;	ÊÑ¿ô̾¤ò¤½¤ì¤¾¤ì¥ê¥¹¥È¤Î·Á¤ÇÄêµÁ¤·¤Æ¤ª¤­¤Þ¤¹¡£Î㤨¤Ð gmhist ¤ò»È¤Ã
;;;	¤Æ¤¤¤ë¾ì¹ç¤Ë¤Ï¡¢
;;;
;;;		(setq revive:save-variables-global-private
;;;		      '(file-history buffer-history minibuffer-history))
;;;
;;;	¤Ê¤É¤È ~/.emacs ¤Ë½ñ¤¤¤Æ¤ª¤¯¤È²÷Ŭ¤Ç¤·¤ç¤¦¡£
;;;
;;;¡ÚÉáÄ̤Ǥʤ¤¥Ð¥Ã¥Õ¥¡¤Î°·¤¤¡Û
;;;
;;;	  mh-rmail ¤Ç¤Ï¥«¥ì¥ó¥È¥Ð¥Ã¥Õ¥¡¤¬ mh-folder-mode, gnus ¤Ç¤Ï¥«¥ì
;;;	¥ó¥È¥Ð¥Ã¥Õ¥¡¤¬ gnus-Group-mode ¤Ë¤Ê¤ê¤Þ¤¹¡£¤³¤ÎÂбþ´Ø·¸¤Ï¡¢ÊÑ¿ô
;;;	revive:major-mode-command-alist-default ¤Ë½ñ¤«¤ì¤Æ¤¤¤Þ¤¹¡£¤³¤ÎÊÑ
;;;	¿ô¤ËÅÐÏ¿¤µ¤ì¤Æ¤¤¤ë°Ê³°¤Î¤â¤Î¤òÄêµÁ¤·¤¿¤¤¾ì¹ç¤Ï¡¢
;;;
;;;		(setq revive:major-mode-command-alist-private
;;;		  '((hogehoge-mode	. hoge)
;;;		    (herohero-mode	. herohero)
;;;		    ("¥¿¥¤¥×¡õ¥á¥Ë¥å¡¼"	. trr)))
;;;
;;;	¤Î¤è¤¦¤Ë revive:major-mode-command-alist-private ¤ÎÃͤòÀßÄꤹ¤ë
;;;	¤È¼¡²ó resume ¤·¤¿»þ¤Ë¼«Æ°Åª¤ËÂбþ¤¹¤ë¥³¥Þ¥ó¥É¤¬µ¯Æ°¤µ¤ì¤Þ¤¹¡£¤Þ
;;;	¤¿¾å¤ÎÎã¤Ë¤¢¤ë¤è¤¦¤Ë¡¢major-mode(¥·¥ó¥Ü¥ë)¤ÎÂå¤ï¤ê¤Ë buffer-name
;;;	(ʸ»úÎó)¤ò»ØÄꤹ¤ë¤³¤È¤â¤Ç¤­¤Þ¤¹¡£
;;;
;;;	  ¤Þ¤¿¡¢SKK¤Î¼­½ñ¤Î¤è¤¦¤Ë¥ê¥¸¥å¡¼¥à¤¹¤ë¤È¤¦¤Þ¤¯Æ°¤«¤Ê¤¯¤Ê¤Ã¤Æ¤·
;;;	¤Þ¤¦¥Ð¥Ã¥Õ¥¡¤¬¤¢¤ë¾ì¹ç¤Ï¡¢ÊÑ¿ô revive:ignore-buffer-pattern ¤Ë¤½
;;;	¤Î¥Ð¥Ã¥Õ¥¡Ì¾¤¬¥Þ¥Ã¥Á¤¹¤ë¤è¤¦¤ÊÀµµ¬É½¸½¤òÀßÄꤷ¤Æ¤¯¤À¤µ¤¤¡£
;;;
;;;¡Ú¥×¥í¥°¥é¥à¤«¤é»È¤¦¡Û
;;;
;;;	  ±Ñ¸ìÈǥɥ­¥å¥á¥ó¥È [For programmers] ¤Î¹à¤ò»²¾È¤·¤Æ¤¯¤À¤µ¤¤¡£
;;;
;;;¡Ú¤¢¤È¤¬¤­¡Û
;;;
;;;	  ºÇ½é¤Ï resume ¤È¤¤¤¦¥Õ¥¡¥¤¥ë̾¤À¤Ã¤¿¤Î¤Ç¤¹¤¬¡¢Emacs 19 ¤Î¥Ç¥£
;;;	¥ì¥¯¥È¥ê¤Ë resume.el ¤È¤¤¤¦¥Õ¥¡¥¤¥ë¤¬¤¢¤Ã¤Æ¥·¥ç¥Ã¥¯¤ò¼õ¤±¤Þ¤·¤¿¡£
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;;;							yuuji@gentei.org

;;; Code:

(defconst revive:version
  "$Id: revive.el,v 2.21 2012/08/12 11:56:06 yuuji Exp yuuji $"
  "Version of revive.el")

(defconst revive:version-prefix ";;;")

(defvar revive:emacs-19 (string< "18" (substring emacs-version 0 2)))
(defvar revive:xemacs-p (featurep 'xemacs))
(defun revive:window-edges (&optional window)
  "Borrowed from tapestry.el"
  (if (and (fboundp 'window-pixel-edges) revive:xemacs-p)
      (let ((edges (window-pixel-edges window))
            tmp)
        (setq tmp edges)
        (setcar tmp (/ (car tmp) (face-width 'default)))
        (setq tmp (cdr tmp))
        (setcar tmp (/ (car tmp) (face-height 'default)))
        (setq tmp (cdr tmp))
        (setcar tmp (/ (car tmp) (face-width 'default)))
        (setq tmp (cdr tmp))
        (setcar tmp (/ (car tmp) (face-height 'default)))
        edges)
    (window-edges window)))

(cond
 ((fboundp 'screen-height)
  (fset 'revive:screen-height 'screen-height)
  (fset 'revive:screen-width 'screen-width))
 ((fboundp 'frame-height)
  (fset 'revive:screen-height 'frame-height)
  (fset 'revive:screen-width 'frame-width))
 (t (error "I don't know how to run revive.el on this Emacs...")))

(defun revive:minx () 0)
(defun revive:miny ()
  (if revive:emacs-19
      (car (cdr (revive:window-edges (frame-first-window nil))))
    0))

(defun revive:window-list ()
  "Return the all window list in sorted order."
  (let*((curwin (selected-window)) (win curwin) wlist)
    (if (null
	 (catch 'found
	   (while t
	     (if (and (= (revive:minx) (car (revive:window-edges win)))
		      (= (revive:miny) (car (cdr (revive:window-edges win)))))
		 (throw 'found t))
	     (if (eq (setq win (next-window win)) curwin)
		 (throw 'found nil)))))
	(error "Unexpected window configuration."))
    (setq curwin win wlist (list win))
    (while (not (eq curwin (setq win (next-window win "w/o mini"))))
      (setq wlist (append wlist (list win)))) ;use append to preserve order
    wlist))

(defun revive:window-buffer-list ()
  "Return the all shown buffer list.
Each element consists of '(buffer-file-name window-start point)"
  (let ((curw (selected-window))(wlist (revive:window-list)) wblist)
    (save-excursion
      (while wlist
	(select-window (car wlist))
	(set-buffer (window-buffer (car wlist))) ;for Emacs 19
	(setq wblist
	      (append wblist
		      (list (list
			     (if (and (fboundp 'abbreviate-file-name)
				      (buffer-file-name))
				 (abbreviate-file-name (buffer-file-name))
			       (buffer-file-name))
			     (window-start)
			     (point))))
	      wlist (cdr wlist)))
      (select-window curw)
      wblist)))

(defun revive:all-window-edges ()
  "Return the all windows edges by list."
  (let ((wlist (revive:window-list)) edges)
    (while wlist
      (setq edges (append edges (list (revive:window-edges (car wlist))))
	    wlist (cdr wlist)))
    edges))

(defun revive:select-window-by-edge (x y)
  "Select window whose north west corner is (X, Y).
If the matching window is not found, select the nearest window."
  (let*((curwin (selected-window)) (win (next-window curwin)) edges
	s2 (min 99999) minwin)
    (or
     (catch 'found
       (while t
	 (setq edges (revive:window-edges win)
	       s2 (+ (* (- (car edges) x) (- (car edges) x))
		     (* (- (nth 1 edges) y) (- (nth 1 edges) y))))
	 (cond
	  ((= s2 0)
	   (select-window win)
	   (throw 'found t))
	  ((< s2 min)
	   (setq min s2 minwin win)))
	 (if (eq win curwin) (throw 'found nil)) ;select the nearest window
	 (setq win (next-window win))))
     (select-window minwin))))

(defun revive:split-window-safe (window size &optional hor-flag)
  "Same as split-window but avoids error."
  (split-window
   window
   (min (max (if hor-flag window-min-width window-min-height) size)
	(if hor-flag (- (revive:screen-width) window-min-width 1)
	  (- (revive:screen-height) window-min-height 1)))
   hor-flag))

(defun revive:restore-winconf (x1 y1 x2 y2 edges)
  "Restore partial window configuration.
Assume (X1, Y1), (X2, Y2) as diagonal corners of partial window.
EDGES is a list of sub-windows' edges."
  (let*((topwin (car edges)) (width (- x2 x1)) (height (- y2 y1))
	right lower)
    (cond
     ((= (length edges) 1) nil)		;nothing to do.

     ;;if the top window has the same width as whole frame.
     ;; +---------+
     ;; |top      |
     ;; +-----+---+
     ;; |2    |3  |
     ;; +-----+---+
     ((= width (- (nth 2 topwin) (car topwin)))
      (setq lower (cdr edges))
      (revive:select-window-by-edge x1 y1)
      (revive:split-window-safe nil (- (nth 3 topwin) (nth 1 topwin)))
      (revive:restore-winconf
       (car (car lower)) (nth 1 (car lower)) x2 y2 lower))

     ;;if the top window has the same height as whole frame.
     ;; +-----+---+
     ;; |top  |2  |
     ;; |     +---+
     ;; |     |3  |
     ;; +-----+---+
     ((= height (- (nth 3 topwin) (nth 1 topwin)))
      (setq right (cdr edges))
      (revive:select-window-by-edge x1 y1)
      (revive:split-window-safe nil (- (nth 2 topwin) (car topwin)) t)
      (revive:restore-winconf
       (car (car right)) (nth 1 (car right)) x2 y2 right))

     ;;These two cases above are specialized solution of below for speed.

     ;;general cases.
     ;; +------+--+  Detect whether window is mainly divided vertically or
     ;; |top   |2 |  horizontally.  And call this function recursively on
     ;; +---+--+--+  former (that is, upper half in vertical division or
     ;; |3  |4..  |  left half in horizontal) and latter configuration.
     ;; +---+-----+
     (t
      (let ((flist (list topwin))
	    (elist (cdr edges)) divwin div-x div-y former latter)
	(while elist
	  (if (or (and (= x1 (car (car elist)))
		       (not (eq (car divwin) x1)))
		  (and (= y1 (nth 1 (car elist)))
		       (not (eq (nth 1 divwin) y1))))
	      (setq divwin (car elist)
		    former flist
		    latter elist))
	  (setq flist (append flist (list (car elist))))
	  (setq elist (cdr elist)))
	(setq div-x (car divwin) div-y (nth 1 divwin))
	(cond
	 ((= x1 (car divwin))	;Mainly divided vertically
	  (revive:select-window-by-edge x1 y1)
	  (revive:split-window-safe nil (- div-y y1))
	  (revive:restore-winconf x1 y1 x2 div-y former)
	  (revive:restore-winconf x1 div-y x2 y2 latter)
	  (message "=="))
	 ((= y1 (nth 1 divwin))
	  (revive:select-window-by-edge x1 y1)
	  (revive:split-window-safe nil (- div-x x1) t)
	  (revive:restore-winconf x1 y1 div-x y2 former)
	  (revive:restore-winconf div-x y1 x2 y2 latter)
	  (message "||"))
	 (t (message "dame!"))))))))

(defvar revive:major-mode-command-alist-default
  '((gnus-Group-mode	. gnus)
    (gnus-group-mode	. gnus)		;version 4.x or later
    (mh-folder-mode	. revive:mh)
    (mew-summary-mode	. revive:mew)
    (shell-mode		. revive:shell)
    (sokoban-mode	. sokoban)
    (dired-mode		. revive:dired)
    (view-mode		. revive:view)
    (Info-mode		. info)
    (mpg123-mode	. revive:mpg123)
    ;;(c-mode		. revive:c-set-style)
    ;;(cc-mode		. revive:c-set-style)
    ;;(java-mode		. revive:c-set-style)
    (twittering-mode . revive:twittering)
    )
  "Default alist of `major-mode' vs. command name.")
(defvar revive:major-mode-command-alist-private nil
  "*User defined revive:major-mode-command-alist")
(defvar revive:major-mode-command-alist nil
  "*Alist of `major-mode' vs. commandname.")
(setq revive:major-mode-command-alist
      (append revive:major-mode-command-alist-private
	      revive:major-mode-command-alist-default))

(defvar revive:save-variables-global-default
  '(truncate-partial-width-windows
    make-backup-files version-control
    visible-bell file-name-history buffer-name-history minibuffer-history)
  "Default list of global variables to save.")
(defvar revive:save-variables-global-private nil
  "*User defined list of the global variables to save.")
(defvar revive:save-variables-global nil
  "*List of global variables to save.")
(setq revive:save-variables-global
      (append revive:save-variables-global-private
	      revive:save-variables-global-default))

(defvar revive:save-variables-local-default
  '(buffer-read-only
    truncate-lines fill-column fill-prefix case-fold-search default-directory)
  "Default list of the local variables to save.")
(defvar revive:save-variables-local-private nil
  "*User defined list of the local variables to save.")

(defvar revive:save-variables-mode-local-default
  '((dired-mode dired-actual-switches)
    (yatex-mode YaTeX-math-mode YaTeX-modify-mode YaTeX-parent-file)
    (yahtml-mode YaTeX-parent-file)
    (c-mode c-indentation-style c-basic-offset)
    (cc-mode c-indentation-style c-basic-offset)
    (java-mode c-indentation-style c-basic-offset)
    (twittering-mode twittering-timeline-spec-string))
  "Default list of the mode specific local variables to save.
Actually, revive doesn't make the buffer local variables assuming
those variable have already localized by their major mode.")
(defvar revive:save-variables-mode-local-private
  nil
  "*User defined list of the mode specific local variables to save.")

(defvar revive:configuration-file
  (if (eq system-type 'ms-dos) "~/_revive.el" "~/.revive.el")
  "*File to save window configuration")

(defvar revive:ignore-buffer-pattern "^ \\*"
  "*Regexp of buffer names revive should ignore.")

(defun revive:normalize-edges (width height edgelist)
  "Normalize all coordinates for current screen size.
'(WIDTH, HEIGHT) is old screen size and EDGELIST is a list of
window-edges."
  (let (normalized (curw (revive:screen-width))
		   (curh (revive:screen-height)) e n)
    (if (and (equal curw width) (equal curh height))
	edgelist
      (while edgelist
	(setq e (car edgelist)
	      n (list (/ (+ (* curw (nth 0 e)) (/ width 2)) width)
		      (/ (+ (* curh (nth 1 e)) (/ height 2)) height)
		      (/ (+ (* curw (nth 2 e)) (/ width 2)) width)
		      (/ (+ (* curh (nth 3 e)) (/ height 2)) height))
	      normalized (append normalized (list n))
	      edgelist (cdr edgelist)))
      normalized)))

(defun construct-window-configuration (edgelist)
  "Restore window configuration by EDGELIST.  EDGELIST should be sorted."
  (delete-other-windows)
  (revive:restore-winconf (revive:minx) (revive:miny)
			  (revive:screen-width)
			  (1- (revive:screen-height)) edgelist))

;;;###autoload
(defun current-window-configuration-printable ()
  "Return the printable current-window-configuration.
This configuration will be stored by restore-window-configuration.
Returned configurations are list of:
'(Screen-Width Screen-Height Edge-List Buffer-List)

Edge-List is a return value of revive:all-window-edges, list of all
window-edges whose first member is always of north west window.

Buffer-List is a list of buffer property list of all windows.  This
property lists are stored in order corresponding to Edge-List.  Buffer
property list is formed as
'((buffer-file-name) (buffer-name) (point) (window-start))."
  (let ((curwin (selected-window))
	(wlist (revive:window-list)) (edges (revive:all-window-edges)) buflist)
    (save-excursion
      (while wlist
	(select-window (car wlist))
	;should set buffer on Emacs 19
	(set-buffer (window-buffer (car wlist)))
	(setq buflist
	      (append buflist (list (list
				     (if (and
					  (buffer-file-name)
					  (fboundp 'abbreviate-file-name))
					 (abbreviate-file-name
					  (buffer-file-name))
				       (buffer-file-name))
				     (buffer-name)
				     (point)
				     (window-start))))
	      wlist (cdr wlist)))
      (select-window curwin)
      (list (revive:screen-width) (revive:screen-height) edges buflist))))

(defmacro revive:get-file (x)
  (list 'car x))
(defmacro revive:get-buffer (x)
  (list 'nth 1 x))
(defmacro revive:get-point (x)
  (list 'nth 2 x))
(defmacro revive:get-window-start (x)
  (list 'nth 3 x))

(defun revive:find-file (file)
  "Make the best effort to find-file FILE."
  (cond
   ((or (null file) (not (stringp file))) nil)
   ((file-exists-p file) (find-file file) (current-buffer))
   ((string-match ":" file)		;maybe ange-ftp's external file
    (if (progn (load "ange-ftp" t) (featurep 'ange-ftp))
	(progn (condition-case err
		   (find-file file)
		 (ftp-error
		  (message "Can't remote file `%s'" file)
		  (condition-case err2	;give a user one more chance.
		      (find-file file)
		    (ftp-error (error "Maybe you made mistake twice.")))))
	       (current-buffer))))
   (t nil)))

;;;###autoload
(defun restore-window-configuration (config)
  "Restore the window configuration.
Configuration CONFIG should be created by
current-window-configuration-printable."
  (let ((width (car config)) (height (nth 1 config))
	(edges (nth 2 config)) (buflist (nth 3 config)) buf)
    (set-buffer (get-buffer-create "*scratch*"))
    (setq edges (revive:normalize-edges width height edges))
    (construct-window-configuration edges)
    (revive:select-window-by-edge (revive:minx) (revive:miny))
    (while buflist
      (setq buf (car buflist))
      (cond
       ((and (revive:get-buffer buf)
	     (get-buffer (revive:get-buffer buf)))
	(switch-to-buffer (revive:get-buffer buf))
	(goto-char (revive:get-window-start buf)) ;to prevent high-bit missing
	(set-window-start nil (point))
	(goto-char (revive:get-point buf)))
       ((and (stringp (revive:get-file buf))
	     (not (file-directory-p (revive:get-file buf)))
	     (revive:find-file (revive:get-file buf)))
	(set-window-start nil (revive:get-window-start buf))
	(goto-char (revive:get-point buf))))
      (setq buflist (cdr buflist))
      (other-window 1))))

;;;	
(defun revive:buffer-list ()
  (delq nil
	(mapcar (function
		 (lambda (b)
		   (if (string-match
			revive:ignore-buffer-pattern
			(buffer-name b)) nil
		     b)))
		(buffer-list))))

;;;###autoload
(defun wipe ()
  "Wipe Emacs."
  (interactive)
  (save-some-buffers)
  (mapcar (function kill-buffer) (revive:buffer-list)))

(defun revive:varlist (var2save)
  "Return the (variable . value) list of variables in VAR2SAVE."
  (delq nil (mapcar
	     (function (lambda (s)
			 (if (and s (boundp s)) (cons s (symbol-value s)))))
	     var2save)))

(defun revive:map-string-match (string alist)
  "Return sub-list if a car component of list in ALIST matches STRING.
That car component is regexp."
  (let (regex)
    (catch 'match
      (while alist
	(setq regex (car (car alist)))
	(if (and regex
		 (stringp regex)
		 (string-match (car (car alist)) string))
	    (throw 'match t))
	(setq alist (cdr alist))))))

(defvar revive:buffer-property-list-hook nil
  "*Evaluated at the beginning of revive:buffer-property-list.")
(defun revive:buffer-property-list ()
  "Return buffers property list.
Returned list is a form of: '(Buffer-List Variable-List).
Buffer-List is a list as
'((buffer-file-name) (buffer-name) major-mode (point) (mark)).
Variable-List is a return value of revive:varlist."
  (let ((buflist (revive:buffer-list)) plist
	(local-var (append revive:save-variables-local-default
			   revive:save-variables-local-private))
	(mode-local-var (append revive:save-variables-mode-local-default
				revive:save-variables-mode-local-private)))
    (save-excursion
      (run-hooks 'revive:buffer-property-list-hook)
      (while buflist
	(set-buffer (car buflist))
	(if (or (assq major-mode revive:major-mode-command-alist)
		(revive:map-string-match
		 (buffer-name) revive:major-mode-command-alist)
		(if (and (fboundp 'abbreviate-file-name) (buffer-file-name))
		    (abbreviate-file-name (buffer-file-name))
		  (buffer-file-name)))
	    (setq plist
		  (append
		   plist
		   (list
		    (list
		     (if (and (fboundp 'abbreviate-file-name)
			      (buffer-file-name))
			 (abbreviate-file-name (buffer-file-name))
		       (buffer-file-name))
		     (buffer-name)
		     major-mode
		     (point)
		     (if revive:emacs-19 (mark t) (mark))
		     (revive:varlist
		      (append local-var (assq major-mode mode-local-var)))
		     )))))
	(setq buflist (cdr buflist))))
    (list plist (revive:varlist revive:save-variables-global))))

(defmacro revive:prop-file-name (x)
  (list 'car x))
(defmacro revive:prop-buffer-name (x)
  (list 'nth 1 x))
(defmacro revive:prop-major-mode (x)
  (list 'nth 2 x))
(defmacro revive:prop-point (x)
  (list 'nth 3 x))
(defmacro revive:prop-mark (x)
  (list 'nth 4 x))
(defmacro revive:prop-varlist (x)
  (list 'nth 5 x))
(defmacro revive:prop-get-value (x y)
  (list 'cdr (list 'assq y (list 'nth 5 x))))

;;;###autoload
(defun save-current-configuration (&optional num)
  "Save current window/buffer configuration into configuration file."
  (interactive "p")
  (let ((bufs (revive:buffer-property-list))
	(config (current-window-configuration-printable)))
    (set-buffer
     (find-file-noselect (expand-file-name revive:configuration-file)))
    (emacs-lisp-mode)
    (widen)
    (goto-char (point-min))
    (and (search-forward revive:version-prefix nil t)
	 (goto-char (match-beginning 0)) (kill-line 1))
    (insert (format "%s%s\n" revive:version-prefix revive:version))
    (setq num (or num 1))
    (if (re-search-forward (format "^(%d" num) nil t)
	(progn (goto-char (match-beginning 0))
	       (kill-sexp 1) (delete-char 1))
      (goto-char (point-max)))
    (delete-blank-lines)
    (if (not (bolp)) (newline 1))
    (insert (format "%s\n" (prin1-to-string (list num bufs config))))
    (basic-save-buffer)
    (kill-buffer (current-buffer))))

(defun revive:restore-value (vlist)
  "Restore variables in VLIST which is a return value of revive:varlist."
  (while vlist
    (if (and (car vlist) (listp (car vlist)))
	(set (car (car vlist)) (cdr (car vlist))))
    (setq vlist (cdr vlist))))

(defvar revive:restore-buffers-hook nil
  "*Run at the end of revive:restore-buffers.")
(defun revive:restore-buffers (buflist)
  "Restore all buffers in BUFLIST which is from revive:buffer-property-list."
  (let ((blist (car buflist)) x command success
	(mmc-alist revive:major-mode-command-alist))
    (revive:restore-value (car (cdr buflist)))
    (while blist
      (setq x (car blist) success nil)
      (if (setq command (or (assq (revive:prop-major-mode x) mmc-alist)
			    (assoc (revive:prop-buffer-name x) mmc-alist)))
	  (condition-case err
	      (let ((noninteractive nil))
		(if (fboundp (cdr command))
		    (progn
		      (call-interactively (cdr command))
		      (setq success t))))
	    ;;(funcall (cdr command))
	    (error (message "%s: %s." (cdr command) err) (sit-for 1)))
	(if (revive:find-file (revive:prop-file-name x))
	    (progn
	      (if (and (not (eq (revive:prop-major-mode x) major-mode))
		       (fboundp (revive:prop-major-mode x)))
		  (if (commandp (revive:prop-major-mode x))
		      (call-interactively (revive:prop-major-mode x))
		    (funcall (revive:prop-major-mode x))))
	      (setq success t)
	      )))
      (cond
       (success
	(if (not (string= (revive:prop-buffer-name x) (buffer-name)))
	    (rename-buffer (revive:prop-buffer-name x)))
	(set-mark (revive:prop-mark x))
	(goto-char (revive:prop-point x))
	(and (fboundp 'region-active-p) (region-active-p) (deactivate-mark))
	(revive:restore-value (revive:prop-varlist x))))
      (setq blist (cdr blist)))
    (run-hooks 'revive:restore-buffers-hook)))

(defvar resume-hook nil "*Run at the end of resume.")
;;;###autoload
(defun resume (&optional num)
  "Resume window/buffer configuration.
Configuration should be saved by save-current-configuration."
  (interactive "p")
  (setq num (or num 1))
  (let (sexp bufs x config)
    (find-file (expand-file-name revive:configuration-file))
    (goto-char (point-min))
    (emacs-lisp-mode)
    (if (null (search-forward revive:version-prefix nil t))
	(error "Configuration file collapsed."))
    (if (and (not (string= revive:version
			   (buffer-substring
			    (point)
			    (prog2 (end-of-line) (point)))))
	     (y-or-n-p
	      "Configuration file's version conflicts. Continue?"))
	(error "Configuration file is old.  Please update."))
    (if (null (re-search-forward (format "^(%d" num) nil t))
	(error "Configuration empty."))
    (goto-char (match-beginning 0))
    (setq sexp (read (current-buffer))
	  bufs (nth 1 sexp)
	  config (nth 2 sexp))
    (kill-buffer (current-buffer))
    (revive:restore-buffers bufs)
    (restore-window-configuration config)
    (run-hooks 'resume-hook)))


;;;
;; Special functions (Each functions should be an interactive one)
;;;
(defun revive:dired ()
  "Restore dired buffer referring the variable x of revive:restore-buffers."
  (interactive)
  (let ((find-file-run-dired t)
	(dir (cdr (assq 'default-directory (revive:prop-varlist x)))))
    (if (and (stringp dir) (file-directory-p dir))
	(progn
	  (dired dir
		 (cdr (assq 'dired-actual-switches (revive:prop-varlist x))))
	  (setq default-directory dir)
	  (cd dir))
      (error "Directory [%s] not found" dir))))

(defun revive:view ()
  "Restore view-mode's buffer."
  (interactive)
  (require 'view)
  (if (fboundp 'view-exit) (view-file (revive:prop-file-name x))
    (if (get 'revive:view 'warning)
	nil
      (switch-to-buffer
       (create-file-buffer
	(concat "** out of use - " (revive:prop-file-name x) " **")))
      (insert
       (message
	"Skip view-modes' buffer since your view.el may use recursive-edit."))
      (kill-buffer nil)
      (put 'revive:view 'warning t)
      (sit-for 5))))

(defun revive:mh ()
  "Restore mh-e's buffer."
  (interactive)
  (require 'mh-e)
  (require 'mh-utils)
  (mh-find-path)
  (get-buffer-create " *mh-temp*")
  (mh-visit-folder (revive:prop-buffer-name x) "all")
  (setq buffer-file-name (revive:prop-file-name x)
	default-directory
	(or (cdr (assq 'default-directory (revive:prop-varlist x)))
	    "~/"))
  (cd default-directory))

(defun revive:mew ()
  "Restore mew's summary buffer."
  (interactive)
  (require 'mew)
  (set-buffer (get-buffer-create (revive:prop-buffer-name x)))
  (setq default-directory
	(or (cdr (assq 'default-directory (revive:prop-varlist x)))
	    "~/"))
  (or (and (boundp 'mew-path) mew-path)
      (and (fboundp 'mew-init) (let (mew-demo) (mew-init))))
  (mew-cache-flush)			;Mew should take more care of
  (get-buffer-create " *mew tmp*")	;unexisting buffer...
  (let ((b (revive:prop-buffer-name x)))
    (cond
     ((fboundp 'mew-summary-folder-create)
      (mew-summary-folder-create b))
     ((fboundp 'mew-summary-switch-to-folder)
      (kill-buffer b)
      (mew-summary-switch-to-folder b))
     (t nil))))

(defun revive:shell ()
  "Restore shell-mode's buffer."
  (interactive)
  (set-buffer (get-buffer-create " *tmp*"))
  (let ((default-directory
	  (or (cdr (assq 'default-directory (revive:prop-varlist x)))
	      ".")))
    (shell)
    (cd default-directory)
    (kill-buffer " *tmp*")))

(defun revive:mpg123 ()
  "Restore mpg123-mode's buffer."
  (interactive)
  (let ((d (cdr (assq 'default-directory (revive:prop-varlist x)))))
    (if (and d (file-directory-p d))
	(progn
	  (require 'mpg123)
	  (mpg123 d)))))

(defun revive:c-set-style ()
  "Restore c-style of C/C++/Java(by cc-mode)."
  (interactive)
  (require 'cc-mode)
  (revive:find-file (revive:prop-file-name x))
  (funcall (revive:prop-major-mode x))
  (c-set-style (or (revive:prop-get-value x 'c-indentation-style) "gnu")))

(defun revive:twittering ()
  "Restore buffer of twittering mode.
This functionality is considered to be migrated from `twittering-mode'."
  (interactive)
  (require 'twittering-mode)
  (twittering-visit-timeline
   (revive:prop-get-value x 'twittering-timeline-spec-string)))

(provide 'revive)


;; $Id: revive.el,v 2.21 2012/08/12 11:56:06 yuuji Exp yuuji $
;; $Log: revive.el,v $
;; Revision 2.21  2012/08/12 11:56:06  yuuji
;; Switched to euc-jp.
;;
;; Revision 2.20  2012/07/25 23:37:38  yuuji
;; Update headers and headings.
;;
;; Revision 2.19  2008/05/13 01:19:16  yuuji
;; Add below to revive:save-variables-global-default.
;; * file-name-history buffer-name-history minibuffer-history
;;
;; Revision 2.18  2003/06/22 05:11:46  yuuji
;; revive:c-set-style disabled.
;;
;; Revision 2.17  2003/06/13 09:27:56  yuuji
;; Use window-pixel-edges on XEmacs only (Thanks to sasaki@fcc.ad.jp)
;;
;; Revision 2.17  2003/06/13 09:25:02  yuuji
;; Use window-pixel-edges on XEmacs only (Thanks to sasaki@fcc.ad.jp)
;;
;; Revision 2.16  2003/05/16 16:47:52  yuuji
;; revive:c-set-style fixed
;;
;; Revision 2.15  2001/11/21 13:51:24  yuuji
;; Support mew2
;;
;; Revision 2.14  1999/08/26 07:27:52  yuuji
;; mpg123.el now revivable.
;;
;; Revision 2.13  1998/04/01 03:52:08  yuuji
;; FSF's Address fixed
;;
;; Revision 2.12  1997/11/29 13:19:33  yuuji
;; XEmacs support
;;
;; Revision 2.11  1997/10/16 16:13:25  yuuji
;; for Emacs-20
;;
;; Revision 2.10  1997/01/27 04:05:17  yuuji
;; revive:split-window-safe fixed
;; mew support fixed again
;;
;; Revision 2.9  1997/01/17 05:33:59  yuuji
;; fix for mew (" *mew tmp*")
;;
; Revision 2.8  1997/01/17  03:06:10  yuuji
; Support mew
;
; Revision 2.7  1995/07/13  01:36:10  yuuji
; Correct document.
; Abbriviate file (directory) name of revive file if possible.
; GNUS v4.x revivable.
; Revive functions for 'mh and 'shell are available.
;
; Revision 2.6  1995/01/23  11:12:08  yuuji
; revive:ignore-buffer-pattern added
;
; Revision 2.5  1994/12/18  09:18:00  yuuji
; Fixed the bug of revive:split-window-safe.
;
; Revision 2.4  1994/11/19  17:50:06  yuuji
; Add revive:save-variables-mode-local-*.
;
; Revision 2.3  1994/09/26  17:17:15  yuuji
; Fix the bug in counting menu-bar-lines.
;
; Revision 2.2  1994/06/06  07:55:05  yuuji
; Support remote file opened with ange-ftp.
;
; Revision 2.1  1994/03/07  08:24:31  yuuji
; Fix the recovery of dired-mode buffer.
;
; Revision 2.0  1994/02/21  07:08:15  yuuji
; Initial version as `revive.el'.
;
; Revision 1.5  1994/02/17  08:48:41  yuuji
; Add `wipe'.
;
; Revision 1.4  1994/02/09  12:41:40  yuuji
; Check nil for file-exists-p.
;
; Revision 1.3  1994/02/09  10:57:49  yuuji
; Resume dired.
;
; Revision 1.2  1994/02/07  12:40:23  yuuji
; Add saving of global variables.
;
; Revision 1.1  1994/02/05  07:55:11  yuuji
; Initial revision
;

; Local variables:
; fill-prefix: ";;;	"
; paragraph-start: "^$\\|\\|;;;$"
; paragraph-separate: "^$\\|\\|;;;$"
; End:
;;; revive.el ends here