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

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

;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003
;;      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 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; Code:

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

(require 'gnus)
(require 'gnus-int)
(require 'nnheader)
(require 'nntp)
(require 'nnmail)
(require 'gnus-util)
(eval-and-compile
  (if (featurep 'xemacs)
      (require 'itimer)
    (require 'timer)))

(defgroup gnus-demon nil
  "Demonic behaviour."
  :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
	  (nnheader-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.
	       (progn
		 (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.
	  (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)
	       (progn
		 (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-connections 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
eec82323	1	;;; gnus-demon.el --- daemonic Gnus behaviour
23f87bed MB	2
	3	;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003
	4	;; 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
	11	;; GNU Emacs is free software; you can redistribute it and/or modify
	12	;; it under the terms of the GNU General Public License as published by
	13	;; the Free Software Foundation; either version 2, or (at your option)
	14	;; any later version.
	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
	22	;; along with GNU Emacs; see the file COPYING. If not, write to the
	23	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	24	;; Boston, MA 02111-1307, USA.
	25
	26	;;; Commentary:
	27
	28	;;; Code:
	29
7df7482d RS	30	(eval-when-compile (require 'cl))
7df7482d RS	31
eec82323 LMI	32	(require 'gnus)
	33	(require 'gnus-int)
	34	(require 'nnheader)
6748645f LMI	35	(require 'nntp)
	36	(require 'nnmail)
	37	(require 'gnus-util)
eec82323	38	(eval-and-compile
a211301f	39	(if (featurep 'xemacs)
eec82323 LMI	40	(require 'itimer)
	41	(require 'timer)))
	42
	43	(defgroup gnus-demon nil
	44	"Demonic behaviour."
	45	:group 'gnus)
	46
	47	(defcustom gnus-demon-handlers nil
	48	"Alist of daemonic handlers to be run at intervals.
	49	Each handler is a list on the form
	50
	51	\(FUNCTION TIME IDLE)
	52
	53	FUNCTION is the function to be called.
	54	TIME is the number of `gnus-demon-timestep's between each call.
	55	If nil, never call. If t, call each `gnus-demon-timestep'.
	56	If IDLE is t, only call if Emacs has been idle for a while. If IDLE
	57	is a number, only call when Emacs has been idle more than this number
	58	of `gnus-demon-timestep's. If IDLE is nil, don't care about
	59	idleness. If IDLE is a number and TIME is nil, then call once each
	60	time Emacs has been idle for IDLE `gnus-demon-timestep's."
	61	:group 'gnus-demon
	62	:type '(repeat (list function
	63	(choice :tag "Time"
	64	(const :tag "never" nil)
	65	(const :tag "one" t)
	66	(integer :tag "steps" 1))
	67	(choice :tag "Idle"
	68	(const :tag "don't care" nil)
	69	(const :tag "for a while" t)
	70	(integer :tag "steps" 1)))))
	71
	72	(defcustom gnus-demon-timestep 60
	73	"*Number of seconds in each demon timestep."
	74	:group 'gnus-demon
	75	:type 'integer)
	76
	77	;;; Internal variables.
	78
	79	(defvar gnus-demon-timer nil)
	80	(defvar gnus-demon-idle-has-been-called nil)
	81	(defvar gnus-demon-idle-time 0)
	82	(defvar gnus-demon-handler-state nil)
	83	(defvar gnus-demon-last-keys nil)
	84	(defvar gnus-inhibit-demon nil
	85	"*If non-nil, no daemonic function will be run.")
	86
eec82323 LMI	87	;;; Functions.
	88
	89	(defun gnus-demon-add-handler (function time idle)
	90	"Add the handler FUNCTION to be run at TIME and IDLE."
	91	;; First remove any old handlers that use this function.
	92	(gnus-demon-remove-handler function)
	93	;; Then add the new one.
	94	(push (list function time idle) gnus-demon-handlers)
	95	(gnus-demon-init))
	96
	97	(defun gnus-demon-remove-handler (function &optional no-init)
	98	"Remove the handler FUNCTION from the list of handlers."
6748645f	99	(gnus-pull function gnus-demon-handlers)
eec82323 LMI	100	(unless no-init
	101	(gnus-demon-init)))
	102
	103	(defun gnus-demon-init ()
	104	"Initialize the Gnus daemon."
	105	(interactive)
	106	(gnus-demon-cancel)
6748645f LMI	107	(when gnus-demon-handlers
6748645f LMI	108	;; Set up the timer.
eec82323 LMI	109	(setq gnus-demon-timer
	110	(nnheader-run-at-time
	111	gnus-demon-timestep gnus-demon-timestep 'gnus-demon))
	112	;; Reset control variables.
	113	(setq gnus-demon-handler-state
	114	(mapcar
	115	(lambda (handler)
	116	(list (car handler) (gnus-demon-time-to-step (nth 1 handler))
	117	(nth 2 handler)))
	118	gnus-demon-handlers))
	119	(setq gnus-demon-idle-time 0)
16409b0b	120	(setq gnus-demon-idle-has-been-called nil)))
eec82323 LMI	121
	122	(gnus-add-shutdown 'gnus-demon-cancel 'gnus)
	123
	124	(defun gnus-demon-cancel ()
	125	"Cancel any Gnus daemons."
	126	(interactive)
	127	(when gnus-demon-timer
	128	(nnheader-cancel-timer gnus-demon-timer))
	129	(setq gnus-demon-timer nil
6748645f	130	gnus-demon-idle-has-been-called nil)
eec82323 LMI	131	(condition-case ()
	132	(nnheader-cancel-function-timers 'gnus-demon)
	133	(error t)))
	134
	135	(defun gnus-demon-is-idle-p ()
	136	"Whether Emacs is idle or not."
	137	;; We do this simply by comparing the 100 most recent keystrokes
	138	;; with the ones we had last time. If they are the same, one might
	139	;; guess that Emacs is indeed idle. This only makes sense if one
	140	;; calls this function seldom -- like once a minute, which is what
	141	;; we do here.
	142	(let ((keys (recent-keys)))
	143	(or (equal keys gnus-demon-last-keys)
	144	(progn
	145	(setq gnus-demon-last-keys keys)
	146	nil))))
	147
	148	(defun gnus-demon-time-to-step (time)
	149	"Find out how many seconds to TIME, which is on the form \"17:43\"."
	150	(if (not (stringp time))
	151	time
a8151ef7	152	(let* ((now (current-time))
23f87bed MB	153	;; obtain NOW as discrete components -- make a vector for speed
	154	(nowParts (decode-time now))
	155	;; obtain THEN as discrete components
	156	(thenParts (parse-time-string time))
	157	(thenHour (elt thenParts 2))
	158	(thenMin (elt thenParts 1))
	159	;; convert time as elements into number of seconds since EPOCH.
	160	(then (encode-time 0
	161	thenMin
	162	thenHour
	163	;; If THEN is earlier than NOW, make it
	164	;; same time tomorrow. Doc for encode-time
	165	;; says that this is OK.
	166	(+ (elt nowParts 3)
	167	(if (or (< thenHour (elt nowParts 2))
	168	(and (= thenHour (elt nowParts 2))
	169	(<= thenMin (elt nowParts 1))))
	170	1 0))
	171	(elt nowParts 4)
	172	(elt nowParts 5)
	173	(elt nowParts 6)
	174	(elt nowParts 7)
	175	(elt nowParts 8)))
	176	;; calculate number of seconds between NOW and THEN
	177	(diff (+ (* 65536 (- (car then) (car now)))
	178	(- (cadr then) (cadr now)))))
a8151ef7 LMI	179	;; return number of timesteps in the number of seconds
a8151ef7 LMI	180	(round (/ diff gnus-demon-timestep)))))
eec82323 LMI	181
	182	(defun gnus-demon ()
	183	"The Gnus daemon that takes care of running all Gnus handlers."
	184	;; Increase or reset the time Emacs has been idle.
	185	(if (gnus-demon-is-idle-p)
	186	(incf gnus-demon-idle-time)
	187	(setq gnus-demon-idle-time 0)
	188	(setq gnus-demon-idle-has-been-called nil))
	189	;; Disable all daemonic stuff if we're in the minibuffer
	190	(when (and (not (window-minibuffer-p (selected-window)))
	191	(not gnus-inhibit-demon))
	192	;; Then we go through all the handler and call those that are
	193	;; sufficiently ripe.
	194	(let ((handlers gnus-demon-handler-state)
	195	(gnus-inhibit-demon t)
16409b0b GM	196	;; Try to avoid dialog boxes, e.g. by Mailcrypt.
	197	;; Unfortunately, Emacs 20's `message-or-box...' doesn't
	198	;; obey `use-dialog-box'.
	199	use-dialog-box (last-nonmenu-event 10)
eec82323 LMI	200	handler time idle)
	201	(while handlers
	202	(setq handler (pop handlers))
	203	(cond
	204	((numberp (setq time (nth 1 handler)))
	205	;; These handlers use a regular timeout mechanism. We decrease
	206	;; the timer if it hasn't reached zero yet.
	207	(unless (zerop time)
	208	(setcar (nthcdr 1 handler) (decf time)))
	209	(and (zerop time) ; If the timer now is zero...
	210	;; Test for appropriate idleness
	211	(progn
	212	(setq idle (nth 2 handler))
	213	(cond
	214	((null idle) t) ; Don't care about idle.
	215	((numberp idle) ; Numerical idle...
	216	(< idle gnus-demon-idle-time)) ; Idle timed out.
	217	(t (< 0 gnus-demon-idle-time)))) ; Or just need to be idle.
	218	;; So we call the handler.
	219	(progn
a8151ef7	220	(ignore-errors (funcall (car handler)))
eec82323 LMI	221	;; And reset the timer.
	222	(setcar (nthcdr 1 handler)
	223	(gnus-demon-time-to-step
	224	(nth 1 (assq (car handler) gnus-demon-handlers)))))))
	225	;; These are only supposed to be called when Emacs is idle.
	226	((null (setq idle (nth 2 handler)))
	227	;; We do nothing.
	228	)
a8151ef7 LMI	229	((and (not (numberp idle))
a8151ef7 LMI	230	(gnus-demon-is-idle-p))
eec82323 LMI	231	;; We want to call this handler each and every time that
eec82323 LMI	232	;; Emacs is idle.
a8151ef7	233	(ignore-errors (funcall (car handler))))
eec82323 LMI	234	(t
	235	;; We want to call this handler only if Emacs has been idle
	236	;; for a specified number of timesteps.
	237	(and (not (memq (car handler) gnus-demon-idle-has-been-called))
	238	(< idle gnus-demon-idle-time)
a8151ef7	239	(gnus-demon-is-idle-p)
eec82323	240	(progn
a8151ef7	241	(ignore-errors (funcall (car handler)))
eec82323 LMI	242	;; Make sure the handler won't be called once more in
	243	;; this idle-cycle.
	244	(push (car handler) gnus-demon-idle-has-been-called)))))))))
	245
	246	(defun gnus-demon-add-nocem ()
	247	"Add daemonic NoCeM handling to Gnus."
a8151ef7	248	(gnus-demon-add-handler 'gnus-demon-scan-nocem 60 30))
eec82323 LMI	249
	250	(defun gnus-demon-scan-nocem ()
	251	"Scan NoCeM groups for NoCeM messages."
	252	(save-window-excursion
	253	(gnus-nocem-scan-groups)))
	254
	255	(defun gnus-demon-add-disconnection ()
	256	"Add daemonic server disconnection to Gnus."
	257	(gnus-demon-add-handler 'gnus-demon-close-connections nil 30))
	258
	259	(defun gnus-demon-close-connections ()
	260	(save-window-excursion
	261	(gnus-close-backends)))
	262
6748645f LMI	263	(defun gnus-demon-add-nntp-close-connection ()
	264	"Add daemonic nntp server disconnection to Gnus.
	265	If no commands have gone out via nntp during the last five
	266	minutes, the connection is closed."
16409b0b	267	(gnus-demon-add-handler 'gnus-demon-nntp-close-connections 5 nil))
6748645f LMI	268
	269	(defun gnus-demon-nntp-close-connection ()
	270	(save-window-excursion
16409b0b	271	(when (time-less-p '(0 300) (time-since nntp-last-command-time))
6748645f LMI	272	(nntp-close-server))))
6748645f LMI	273
eec82323 LMI	274	(defun gnus-demon-add-scanmail ()
	275	"Add daemonic scanning of mail from the mail backends."
	276	(gnus-demon-add-handler 'gnus-demon-scan-mail 120 60))
	277
	278	(defun gnus-demon-scan-mail ()
	279	(save-window-excursion
	280	(let ((servers gnus-opened-servers)
16409b0b GM	281	server
16409b0b GM	282	(nnmail-fetched-sources (list t)))
eec82323 LMI	283	(while (setq server (car (pop servers)))
	284	(and (gnus-check-backend-function 'request-scan (car server))
	285	(or (gnus-server-opened server)
	286	(gnus-open-server server))
	287	(gnus-request-scan nil server))))))
	288
	289	(defun gnus-demon-add-rescan ()
	290	"Add daemonic scanning of new articles from all backends."
	291	(gnus-demon-add-handler 'gnus-demon-scan-news 120 60))
	292
	293	(defun gnus-demon-scan-news ()
6748645f LMI	294	(let ((win (current-window-configuration)))
	295	(unwind-protect
	296	(save-window-excursion
	297	(save-excursion
	298	(when (gnus-alive-p)
	299	(save-excursion
	300	(set-buffer gnus-group-buffer)
	301	(gnus-group-get-new-news)))))
	302	(set-window-configuration win))))
eec82323 LMI	303
	304	(defun gnus-demon-add-scan-timestamps ()
	305	"Add daemonic updating of timestamps in empty newgroups."
	306	(gnus-demon-add-handler 'gnus-demon-scan-timestamps nil 30))
	307
	308	(defun gnus-demon-scan-timestamps ()
	309	"Set the timestamp on all newsgroups with no unread and no ticked articles."
	310	(when (gnus-alive-p)
	311	(let ((cur-time (current-time))
	312	(newsrc (cdr gnus-newsrc-alist))
	313	info group unread has-ticked)
	314	(while (setq info (pop newsrc))
	315	(setq group (gnus-info-group info)
	316	unread (gnus-group-unread group)
	317	has-ticked (cdr (assq 'tick (gnus-info-marks info))))
	318	(when (and (numberp unread)
	319	(= unread 0)
	320	(not has-ticked))
	321	(gnus-group-set-parameter group 'timestamp cur-time))))))
	322
	323	(provide 'gnus-demon)
	324
ab5796a9	325	;;; arch-tag: 8dd5cd3d-6ae4-46b4-9b15-f5fca09fd392
eec82323	326	;;; gnus-demon.el ends here