[bpt/emacs.git] / lisp / gnus / gnus-demon.el

;;; gnus-demon.el --- daemonic Gnus behavior

;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
;;   2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news

;; 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;;; Code:

(eval-when-compile (require 'cl))

(require 'gnus)
(require 'gnus-int)
(require 'nnheader)
(require 'nntp)
(require 'nnmail)
(require 'gnus-util)

(autoload 'parse-time-string "parse-time" nil nil)

(defgroup gnus-demon nil
  "Demonic behavior."
  :group 'gnus)

(defcustom gnus-demon-handlers nil
  "Alist of daemonic handlers to be run at intervals.
Each handler is a list on the form

\(FUNCTION TIME IDLE)

FUNCTION is the function to be called.
TIME is the number of `gnus-demon-timestep's between each call.
If nil, never call.  If t, call each `gnus-demon-timestep'.
If IDLE is t, only call if Emacs has been idle for a while.  If IDLE
is a number, only call when Emacs has been idle more than this number
of `gnus-demon-timestep's.  If IDLE is nil, don't care about
idleness.  If IDLE is a number and TIME is nil, then call once each
time Emacs has been idle for IDLE `gnus-demon-timestep's."
  :group 'gnus-demon
  :type '(repeat (list function
		       (choice :tag "Time"
			       (const :tag "never" nil)
			       (const :tag "one" t)
			       (integer :tag "steps" 1))
		       (choice :tag "Idle"
			       (const :tag "don't care" nil)
			       (const :tag "for a while" t)
			       (integer :tag "steps" 1)))))

(defcustom gnus-demon-timestep 60
  "*Number of seconds in each demon timestep."
  :group 'gnus-demon
  :type 'integer)

;;; Internal variables.

(defvar gnus-demon-timer nil)
(defvar gnus-demon-idle-has-been-called nil)
(defvar gnus-demon-idle-time 0)
(defvar gnus-demon-handler-state nil)
(defvar gnus-demon-last-keys nil)
(defvar gnus-inhibit-demon nil
  "*If non-nil, no daemonic function will be run.")

;;; Functions.

(defun gnus-demon-add-handler (function time idle)
  "Add the handler FUNCTION to be run at TIME and IDLE."
  ;; First remove any old handlers that use this function.
  (gnus-demon-remove-handler function)
  ;; Then add the new one.
  (push (list function time idle) gnus-demon-handlers)
  (gnus-demon-init))

(defun gnus-demon-remove-handler (function &optional no-init)
  "Remove the handler FUNCTION from the list of handlers."
  (gnus-pull function gnus-demon-handlers)
  (unless no-init
    (gnus-demon-init)))

(defun gnus-demon-init ()
  "Initialize the Gnus daemon."
  (interactive)
  (gnus-demon-cancel)
  (when gnus-demon-handlers
    ;; Set up the timer.
    (setq gnus-demon-timer
	  (run-at-time
	   gnus-demon-timestep gnus-demon-timestep 'gnus-demon))
    ;; Reset control variables.
    (setq gnus-demon-handler-state
	  (mapcar
	   (lambda (handler)
	     (list (car handler) (gnus-demon-time-to-step (nth 1 handler))
		   (nth 2 handler)))
	   gnus-demon-handlers))
    (setq gnus-demon-idle-time 0)
    (setq gnus-demon-idle-has-been-called nil)))

(gnus-add-shutdown 'gnus-demon-cancel 'gnus)

(defun gnus-demon-cancel ()
  "Cancel any Gnus daemons."
  (interactive)
  (when gnus-demon-timer
    (nnheader-cancel-timer gnus-demon-timer))
  (setq gnus-demon-timer nil
	gnus-demon-idle-has-been-called nil)
  (condition-case ()
      (nnheader-cancel-function-timers 'gnus-demon)
    (error t)))

(defun gnus-demon-is-idle-p ()
  "Whether Emacs is idle or not."
  ;; We do this simply by comparing the 100 most recent keystrokes
  ;; with the ones we had last time.  If they are the same, one might
  ;; guess that Emacs is indeed idle.  This only makes sense if one
  ;; calls this function seldom -- like once a minute, which is what
  ;; we do here.
  (let ((keys (recent-keys)))
    (or (equal keys gnus-demon-last-keys)
	(progn
	  (setq gnus-demon-last-keys keys)
	  nil))))

(defun gnus-demon-time-to-step (time)
  "Find out how many seconds to TIME, which is on the form \"17:43\"."
  (if (not (stringp time))
      time
    (let* ((now (current-time))
	   ;; obtain NOW as discrete components -- make a vector for speed
	   (nowParts (decode-time now))
	   ;; obtain THEN as discrete components
	   (thenParts (parse-time-string time))
	   (thenHour (elt thenParts 2))
	   (thenMin (elt thenParts 1))
	   ;; convert time as elements into number of seconds since EPOCH.
	   (then (encode-time 0
			      thenMin
			      thenHour
			      ;; If THEN is earlier than NOW, make it
			      ;; same time tomorrow.  Doc for encode-time
			      ;; says that this is OK.
			      (+ (elt nowParts 3)
				 (if (or (< thenHour (elt nowParts 2))
					 (and (= thenHour (elt nowParts 2))
					      (<= thenMin (elt nowParts 1))))
				     1 0))
			      (elt nowParts 4)
			      (elt nowParts 5)
			      (elt nowParts 6)
			      (elt nowParts 7)
			      (elt nowParts 8)))
	   ;; calculate number of seconds between NOW and THEN
	   (diff (+ (* 65536 (- (car then) (car now)))
		    (- (cadr then) (cadr now)))))
      ;; return number of timesteps in the number of seconds
      (round (/ diff gnus-demon-timestep)))))

(defun gnus-demon ()
  "The Gnus daemon that takes care of running all Gnus handlers."
  ;; Increase or reset the time Emacs has been idle.
  (if (gnus-demon-is-idle-p)
      (incf gnus-demon-idle-time)
    (setq gnus-demon-idle-time 0)
    (setq gnus-demon-idle-has-been-called nil))
  ;; Disable all daemonic stuff if we're in the minibuffer
  (when (and (not (window-minibuffer-p (selected-window)))
	     (not gnus-inhibit-demon))
    ;; Then we go through all the handler and call those that are
    ;; sufficiently ripe.
    (let ((handlers gnus-demon-handler-state)
	  (gnus-inhibit-demon t)
	  ;; Try to avoid dialog boxes, e.g. by Mailcrypt.
	  ;; Unfortunately, Emacs 20's `message-or-box...' doesn't
	  ;; obey `use-dialog-box'.
	  use-dialog-box (last-nonmenu-event 10)
	  handler time idle)
      (while handlers
	(setq handler (pop handlers))
	(cond
	 ((numberp (setq time (nth 1 handler)))
	  ;; These handlers use a regular timeout mechanism.  We decrease
	  ;; the timer if it hasn't reached zero yet.
	  (unless (zerop time)
	    (setcar (nthcdr 1 handler) (decf time)))
	  (and (zerop time)		; If the timer now is zero...
	       ;; Test for appropriate idleness
	       (progn
		 (setq idle (nth 2 handler))
		 (cond
		  ((null idle) t)	; Don't care about idle.
		  ((numberp idle)	; Numerical idle...
		   (< idle gnus-demon-idle-time)) ; Idle timed out.
		  (t (< 0 gnus-demon-idle-time)))) ; Or just need to be idle.
	       ;; So we call the handler.
	       (gnus-with-local-quit
		 (ignore-errors (funcall (car handler)))
		 ;; And reset the timer.
		 (setcar (nthcdr 1 handler)
			 (gnus-demon-time-to-step
			  (nth 1 (assq (car handler) gnus-demon-handlers)))))))
	 ;; These are only supposed to be called when Emacs is idle.
	 ((null (setq idle (nth 2 handler)))
	  ;; We do nothing.
	  )
	 ((and (not (numberp idle))
	       (gnus-demon-is-idle-p))
	  ;; We want to call this handler each and every time that
	  ;; Emacs is idle.
	  (gnus-with-local-quit
	    (ignore-errors (funcall (car handler)))))
	 (t
	  ;; We want to call this handler only if Emacs has been idle
	  ;; for a specified number of timesteps.
	  (and (not (memq (car handler) gnus-demon-idle-has-been-called))
	       (< idle gnus-demon-idle-time)
	       (gnus-demon-is-idle-p)
	       (gnus-with-local-quit
		 (ignore-errors (funcall (car handler)))
		 ;; Make sure the handler won't be called once more in
		 ;; this idle-cycle.
		 (push (car handler) gnus-demon-idle-has-been-called)))))))))

(defun gnus-demon-add-nocem ()
  "Add daemonic NoCeM handling to Gnus."
  (gnus-demon-add-handler 'gnus-demon-scan-nocem 60 30))

(defun gnus-demon-scan-nocem ()
  "Scan NoCeM groups for NoCeM messages."
  (save-window-excursion
    (gnus-nocem-scan-groups)))

(defun gnus-demon-add-disconnection ()
  "Add daemonic server disconnection to Gnus."
  (gnus-demon-add-handler 'gnus-demon-close-connections nil 30))

(defun gnus-demon-close-connections ()
  (save-window-excursion
    (gnus-close-backends)))

(defun gnus-demon-add-nntp-close-connection ()
  "Add daemonic nntp server disconnection to Gnus.
If no commands have gone out via nntp during the last five
minutes, the connection is closed."
  (gnus-demon-add-handler 'gnus-demon-nntp-close-connection 5 nil))

(defun gnus-demon-nntp-close-connection ()
  (save-window-excursion
    (when (time-less-p '(0 300) (time-since nntp-last-command-time))
      (nntp-close-server))))

(defun gnus-demon-add-scanmail ()
  "Add daemonic scanning of mail from the mail backends."
  (gnus-demon-add-handler 'gnus-demon-scan-mail 120 60))

(defun gnus-demon-scan-mail ()
  (save-window-excursion
    (let ((servers gnus-opened-servers)
	  server
	  (nnmail-fetched-sources (list t)))
      (while (setq server (car (pop servers)))
	(and (gnus-check-backend-function 'request-scan (car server))
	     (or (gnus-server-opened server)
		 (gnus-open-server server))
	     (gnus-request-scan nil server))))))

(defun gnus-demon-add-rescan ()
  "Add daemonic scanning of new articles from all backends."
  (gnus-demon-add-handler 'gnus-demon-scan-news 120 60))

(defun gnus-demon-scan-news ()
  (let ((win (current-window-configuration)))
    (unwind-protect
	(save-window-excursion
	  (save-excursion
	    (when (gnus-alive-p)
	      (save-excursion
		(set-buffer gnus-group-buffer)
		(gnus-group-get-new-news)))))
      (set-window-configuration win))))

(defun gnus-demon-add-scan-timestamps ()
  "Add daemonic updating of timestamps in empty newgroups."
  (gnus-demon-add-handler 'gnus-demon-scan-timestamps nil 30))

(defun gnus-demon-scan-timestamps ()
  "Set the timestamp on all newsgroups with no unread and no ticked articles."
  (when (gnus-alive-p)
    (let ((cur-time (current-time))
	  (newsrc (cdr gnus-newsrc-alist))
	  info group unread has-ticked)
      (while (setq info (pop newsrc))
	(setq group (gnus-info-group info)
	      unread (gnus-group-unread group)
	      has-ticked (cdr (assq 'tick (gnus-info-marks info))))
	(when (and (numberp unread)
		   (= unread 0)
		   (not has-ticked))
	  (gnus-group-set-parameter group 'timestamp cur-time))))))

(provide 'gnus-demon)

;; arch-tag: 8dd5cd3d-6ae4-46b4-9b15-f5fca09fd392
;;; gnus-demon.el ends here
Commit	Line	Data
fffa137c	1	;;; gnus-demon.el --- daemonic Gnus behavior
23f87bed	2
b6c2d8c6	3	;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
5df4f04c	4	;; 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
eec82323	5
6748645f	6	;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
eec82323 LMI	7	;; Keywords: news
	8
	9	;; This file is part of GNU Emacs.
	10
5e809f55	11	;; GNU Emacs is free software: you can redistribute it and/or modify
eec82323	12	;; it under the terms of the GNU General Public License as published by
5e809f55 GM	13	;; the Free Software Foundation, either version 3 of the License, or
5e809f55 GM	14	;; (at your option) any later version.
eec82323 LMI	15
	16	;; GNU Emacs is distributed in the hope that it will be useful,
	17	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	;; GNU General Public License for more details.
	20
	21	;; You should have received a copy of the GNU General Public License
5e809f55	22	;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
eec82323 LMI	23
	24	;;; Commentary:
	25
	26	;;; Code:
	27
7df7482d RS	28	(eval-when-compile (require 'cl))
7df7482d RS	29
eec82323 LMI	30	(require 'gnus)
	31	(require 'gnus-int)
	32	(require 'nnheader)
6748645f LMI	33	(require 'nntp)
	34	(require 'nnmail)
	35	(require 'gnus-util)
eec82323	36
498063ec MB	37	(autoload 'parse-time-string "parse-time" nil nil)
498063ec MB	38
eec82323	39	(defgroup gnus-demon nil
4525646f	40	"Demonic behavior."
eec82323 LMI	41	:group 'gnus)
	42
	43	(defcustom gnus-demon-handlers nil
	44	"Alist of daemonic handlers to be run at intervals.
	45	Each handler is a list on the form
	46
	47	\(FUNCTION TIME IDLE)
	48
	49	FUNCTION is the function to be called.
	50	TIME is the number of `gnus-demon-timestep's between each call.
	51	If nil, never call. If t, call each `gnus-demon-timestep'.
	52	If IDLE is t, only call if Emacs has been idle for a while. If IDLE
	53	is a number, only call when Emacs has been idle more than this number
	54	of `gnus-demon-timestep's. If IDLE is nil, don't care about
	55	idleness. If IDLE is a number and TIME is nil, then call once each
	56	time Emacs has been idle for IDLE `gnus-demon-timestep's."
	57	:group 'gnus-demon
	58	:type '(repeat (list function
	59	(choice :tag "Time"
	60	(const :tag "never" nil)
	61	(const :tag "one" t)
	62	(integer :tag "steps" 1))
	63	(choice :tag "Idle"
	64	(const :tag "don't care" nil)
	65	(const :tag "for a while" t)
	66	(integer :tag "steps" 1)))))
	67
	68	(defcustom gnus-demon-timestep 60
	69	"*Number of seconds in each demon timestep."
	70	:group 'gnus-demon
	71	:type 'integer)
	72
	73	;;; Internal variables.
	74
	75	(defvar gnus-demon-timer nil)
	76	(defvar gnus-demon-idle-has-been-called nil)
	77	(defvar gnus-demon-idle-time 0)
	78	(defvar gnus-demon-handler-state nil)
	79	(defvar gnus-demon-last-keys nil)
	80	(defvar gnus-inhibit-demon nil
	81	"*If non-nil, no daemonic function will be run.")
	82
eec82323 LMI	83	;;; Functions.
	84
	85	(defun gnus-demon-add-handler (function time idle)
	86	"Add the handler FUNCTION to be run at TIME and IDLE."
	87	;; First remove any old handlers that use this function.
	88	(gnus-demon-remove-handler function)
	89	;; Then add the new one.
	90	(push (list function time idle) gnus-demon-handlers)
	91	(gnus-demon-init))
	92
	93	(defun gnus-demon-remove-handler (function &optional no-init)
	94	"Remove the handler FUNCTION from the list of handlers."
6748645f	95	(gnus-pull function gnus-demon-handlers)
eec82323 LMI	96	(unless no-init
	97	(gnus-demon-init)))
	98
	99	(defun gnus-demon-init ()
	100	"Initialize the Gnus daemon."
	101	(interactive)
	102	(gnus-demon-cancel)
6748645f LMI	103	(when gnus-demon-handlers
6748645f LMI	104	;; Set up the timer.
eec82323	105	(setq gnus-demon-timer
01c52d31	106	(run-at-time
eec82323 LMI	107	gnus-demon-timestep gnus-demon-timestep 'gnus-demon))
	108	;; Reset control variables.
	109	(setq gnus-demon-handler-state
	110	(mapcar
	111	(lambda (handler)
	112	(list (car handler) (gnus-demon-time-to-step (nth 1 handler))
	113	(nth 2 handler)))
	114	gnus-demon-handlers))
	115	(setq gnus-demon-idle-time 0)
16409b0b	116	(setq gnus-demon-idle-has-been-called nil)))
eec82323 LMI	117
	118	(gnus-add-shutdown 'gnus-demon-cancel 'gnus)
	119
	120	(defun gnus-demon-cancel ()
	121	"Cancel any Gnus daemons."
	122	(interactive)
	123	(when gnus-demon-timer
	124	(nnheader-cancel-timer gnus-demon-timer))
	125	(setq gnus-demon-timer nil
6748645f	126	gnus-demon-idle-has-been-called nil)
eec82323 LMI	127	(condition-case ()
	128	(nnheader-cancel-function-timers 'gnus-demon)
	129	(error t)))
	130
	131	(defun gnus-demon-is-idle-p ()
	132	"Whether Emacs is idle or not."
	133	;; We do this simply by comparing the 100 most recent keystrokes
	134	;; with the ones we had last time. If they are the same, one might
	135	;; guess that Emacs is indeed idle. This only makes sense if one
	136	;; calls this function seldom -- like once a minute, which is what
	137	;; we do here.
	138	(let ((keys (recent-keys)))
	139	(or (equal keys gnus-demon-last-keys)
	140	(progn
	141	(setq gnus-demon-last-keys keys)
	142	nil))))
	143
	144	(defun gnus-demon-time-to-step (time)
	145	"Find out how many seconds to TIME, which is on the form \"17:43\"."
	146	(if (not (stringp time))
	147	time
a8151ef7	148	(let* ((now (current-time))
23f87bed MB	149	;; obtain NOW as discrete components -- make a vector for speed
	150	(nowParts (decode-time now))
	151	;; obtain THEN as discrete components
	152	(thenParts (parse-time-string time))
	153	(thenHour (elt thenParts 2))
	154	(thenMin (elt thenParts 1))
	155	;; convert time as elements into number of seconds since EPOCH.
	156	(then (encode-time 0
	157	thenMin
	158	thenHour
	159	;; If THEN is earlier than NOW, make it
	160	;; same time tomorrow. Doc for encode-time
	161	;; says that this is OK.
	162	(+ (elt nowParts 3)
	163	(if (or (< thenHour (elt nowParts 2))
	164	(and (= thenHour (elt nowParts 2))
	165	(<= thenMin (elt nowParts 1))))
	166	1 0))
	167	(elt nowParts 4)
	168	(elt nowParts 5)
	169	(elt nowParts 6)
	170	(elt nowParts 7)
	171	(elt nowParts 8)))
	172	;; calculate number of seconds between NOW and THEN
	173	(diff (+ (* 65536 (- (car then) (car now)))
	174	(- (cadr then) (cadr now)))))
a8151ef7 LMI	175	;; return number of timesteps in the number of seconds
a8151ef7 LMI	176	(round (/ diff gnus-demon-timestep)))))
eec82323 LMI	177
	178	(defun gnus-demon ()
	179	"The Gnus daemon that takes care of running all Gnus handlers."
	180	;; Increase or reset the time Emacs has been idle.
	181	(if (gnus-demon-is-idle-p)
	182	(incf gnus-demon-idle-time)
	183	(setq gnus-demon-idle-time 0)
	184	(setq gnus-demon-idle-has-been-called nil))
	185	;; Disable all daemonic stuff if we're in the minibuffer
	186	(when (and (not (window-minibuffer-p (selected-window)))
	187	(not gnus-inhibit-demon))
	188	;; Then we go through all the handler and call those that are
	189	;; sufficiently ripe.
	190	(let ((handlers gnus-demon-handler-state)
	191	(gnus-inhibit-demon t)
16409b0b GM	192	;; Try to avoid dialog boxes, e.g. by Mailcrypt.
	193	;; Unfortunately, Emacs 20's `message-or-box...' doesn't
	194	;; obey `use-dialog-box'.
	195	use-dialog-box (last-nonmenu-event 10)
eec82323 LMI	196	handler time idle)
	197	(while handlers
	198	(setq handler (pop handlers))
	199	(cond
	200	((numberp (setq time (nth 1 handler)))
	201	;; These handlers use a regular timeout mechanism. We decrease
	202	;; the timer if it hasn't reached zero yet.
	203	(unless (zerop time)
	204	(setcar (nthcdr 1 handler) (decf time)))
	205	(and (zerop time) ; If the timer now is zero...
	206	;; Test for appropriate idleness
	207	(progn
	208	(setq idle (nth 2 handler))
	209	(cond
	210	((null idle) t) ; Don't care about idle.
	211	((numberp idle) ; Numerical idle...
	212	(< idle gnus-demon-idle-time)) ; Idle timed out.
	213	(t (< 0 gnus-demon-idle-time)))) ; Or just need to be idle.
	214	;; So we call the handler.
996aa8c1	215	(gnus-with-local-quit
a8151ef7	216	(ignore-errors (funcall (car handler)))
eec82323 LMI	217	;; And reset the timer.
	218	(setcar (nthcdr 1 handler)
	219	(gnus-demon-time-to-step
	220	(nth 1 (assq (car handler) gnus-demon-handlers)))))))
	221	;; These are only supposed to be called when Emacs is idle.
	222	((null (setq idle (nth 2 handler)))
	223	;; We do nothing.
	224	)
a8151ef7 LMI	225	((and (not (numberp idle))
a8151ef7 LMI	226	(gnus-demon-is-idle-p))
eec82323 LMI	227	;; We want to call this handler each and every time that
eec82323 LMI	228	;; Emacs is idle.
996aa8c1	229	(gnus-with-local-quit
90e93246	230	(ignore-errors (funcall (car handler)))))
eec82323 LMI	231	(t
	232	;; We want to call this handler only if Emacs has been idle
	233	;; for a specified number of timesteps.
	234	(and (not (memq (car handler) gnus-demon-idle-has-been-called))
	235	(< idle gnus-demon-idle-time)
a8151ef7	236	(gnus-demon-is-idle-p)
996aa8c1	237	(gnus-with-local-quit
a8151ef7	238	(ignore-errors (funcall (car handler)))
eec82323 LMI	239	;; Make sure the handler won't be called once more in
	240	;; this idle-cycle.
	241	(push (car handler) gnus-demon-idle-has-been-called)))))))))
	242
	243	(defun gnus-demon-add-nocem ()
	244	"Add daemonic NoCeM handling to Gnus."
a8151ef7	245	(gnus-demon-add-handler 'gnus-demon-scan-nocem 60 30))
eec82323 LMI	246
	247	(defun gnus-demon-scan-nocem ()
	248	"Scan NoCeM groups for NoCeM messages."
	249	(save-window-excursion
	250	(gnus-nocem-scan-groups)))
	251
	252	(defun gnus-demon-add-disconnection ()
	253	"Add daemonic server disconnection to Gnus."
	254	(gnus-demon-add-handler 'gnus-demon-close-connections nil 30))
	255
	256	(defun gnus-demon-close-connections ()
	257	(save-window-excursion
	258	(gnus-close-backends)))
	259
6748645f LMI	260	(defun gnus-demon-add-nntp-close-connection ()
	261	"Add daemonic nntp server disconnection to Gnus.
	262	If no commands have gone out via nntp during the last five
	263	minutes, the connection is closed."
1d2faf98	264	(gnus-demon-add-handler 'gnus-demon-nntp-close-connection 5 nil))
6748645f LMI	265
	266	(defun gnus-demon-nntp-close-connection ()
	267	(save-window-excursion
16409b0b	268	(when (time-less-p '(0 300) (time-since nntp-last-command-time))
6748645f LMI	269	(nntp-close-server))))
6748645f LMI	270
eec82323 LMI	271	(defun gnus-demon-add-scanmail ()
	272	"Add daemonic scanning of mail from the mail backends."
	273	(gnus-demon-add-handler 'gnus-demon-scan-mail 120 60))
	274
	275	(defun gnus-demon-scan-mail ()
	276	(save-window-excursion
	277	(let ((servers gnus-opened-servers)
16409b0b GM	278	server
16409b0b GM	279	(nnmail-fetched-sources (list t)))
eec82323 LMI	280	(while (setq server (car (pop servers)))
	281	(and (gnus-check-backend-function 'request-scan (car server))
	282	(or (gnus-server-opened server)
	283	(gnus-open-server server))
	284	(gnus-request-scan nil server))))))
	285
	286	(defun gnus-demon-add-rescan ()
	287	"Add daemonic scanning of new articles from all backends."
	288	(gnus-demon-add-handler 'gnus-demon-scan-news 120 60))
	289
	290	(defun gnus-demon-scan-news ()
6748645f LMI	291	(let ((win (current-window-configuration)))
	292	(unwind-protect
	293	(save-window-excursion
	294	(save-excursion
	295	(when (gnus-alive-p)
	296	(save-excursion
	297	(set-buffer gnus-group-buffer)
	298	(gnus-group-get-new-news)))))
	299	(set-window-configuration win))))
eec82323 LMI	300
	301	(defun gnus-demon-add-scan-timestamps ()
	302	"Add daemonic updating of timestamps in empty newgroups."
	303	(gnus-demon-add-handler 'gnus-demon-scan-timestamps nil 30))
	304
	305	(defun gnus-demon-scan-timestamps ()
	306	"Set the timestamp on all newsgroups with no unread and no ticked articles."
	307	(when (gnus-alive-p)
	308	(let ((cur-time (current-time))
	309	(newsrc (cdr gnus-newsrc-alist))
	310	info group unread has-ticked)
	311	(while (setq info (pop newsrc))
	312	(setq group (gnus-info-group info)
	313	unread (gnus-group-unread group)
	314	has-ticked (cdr (assq 'tick (gnus-info-marks info))))
	315	(when (and (numberp unread)
	316	(= unread 0)
	317	(not has-ticked))
	318	(gnus-group-set-parameter group 'timestamp cur-time))))))
	319
	320	(provide 'gnus-demon)
	321
cbee283d	322	;; arch-tag: 8dd5cd3d-6ae4-46b4-9b15-f5fca09fd392
eec82323	323	;;; gnus-demon.el ends here