-;;; gnus-demon.el --- daemonic Gnus behaviour
-;; Copyright (C) 1995,96,97 Free Software Foundation, Inc.
+;;; gnus-demon.el --- daemonic Gnus behavior
-;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+;; 2005, 2006, 2007, 2008, 2009, 2010 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
+;; 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.
+;; 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
;; 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.
+;; 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)
-(eval-and-compile
- (if (string-match "XEmacs" (emacs-version))
- (require 'itimer)
- (require 'timer)))
+(require 'nntp)
+(require 'nnmail)
(defgroup gnus-demon nil
- "Demonic behaviour."
+ "Demonic behavior."
:group 'gnus)
(defcustom gnus-demon-handlers nil
\(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."
+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 each time Emacs has been idle for TIME.
+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"
+ :type '(repeat (list function
+ (choice :tag "Time"
(const :tag "never" nil)
(const :tag "one" t)
(integer :tag "steps" 1))
(integer :tag "steps" 1)))))
(defcustom gnus-demon-timestep 60
- "*Number of seconds in each demon timestep."
+ "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)
-
-(eval-and-compile
- (autoload 'timezone-parse-date "timezone")
- (autoload 'timezone-make-arpa-date "timezone"))
+(defvar gnus-demon-timers nil
+ "List of idle timers which are running.")
+(defvar gnus-inhibit-demon nil
+ "If non-nil, no daemonic function will be run.")
;;; Functions.
(defun gnus-demon-remove-handler (function &optional no-init)
"Remove the handler FUNCTION from the list of handlers."
- (setq gnus-demon-handlers
- (delq (assq function gnus-demon-handlers)
- gnus-demon-handlers))
+ (gnus-alist-pull function gnus-demon-handlers)
(unless no-init
(gnus-demon-init)))
+(defun gnus-demon-idle-since ()
+ "Return the number of seconds since when Emacs is idle."
+ (if (featurep 'xemacs)
+ (itimer-time-difference (current-time) last-command-event-time)
+ (float-time (or (current-idle-time)
+ '(0 0 0)))))
+
+(defun gnus-demon-run-callback (func &optional idle)
+ "Run FUNC if Emacs has been idle for longer than IDLE seconds."
+ (unless gnus-inhibit-demon
+ (when (or (not idle)
+ (<= idle (gnus-demon-idle-since)))
+ (with-local-quit
+ (ignore-errors
+ (funcall func))))))
+
(defun gnus-demon-init ()
"Initialize the Gnus daemon."
(interactive)
(gnus-demon-cancel)
- (if (null gnus-demon-handlers)
- () ; Nothing to do.
- ;; Set up 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)
- (setq gnus-use-demon t)))
+ (dolist (handler gnus-demon-handlers)
+ ;; Set up the timer.
+ (let* ((func (nth 0 handler))
+ (time (nth 1 handler))
+ (idle (nth 2 handler))
+ ;; Compute time according with timestep.
+ ;; If t, replace by 1
+ (time (cond ((eq time t)
+ gnus-demon-timestep)
+ ((null time))
+ (t (* time gnus-demon-timestep))))
+ (timer
+ (cond
+ ;; (func number t)
+ ;; Call when Emacs has been idle for `time'
+ ((and (numberp time) (eq idle t))
+ (run-with-timer t time 'gnus-demon-run-callback func time))
+ ;; (func number number)
+ ;; Call every `time' when Emacs has been idle for `idle'
+ ((and (numberp time) (numberp idle))
+ (run-with-timer t time 'gnus-demon-run-callback func idle))
+ ;; (func nil number)
+ ;; Only call when Emacs has been idle for `idle'
+ ((and (null time) (numberp idle))
+ (run-with-idle-timer (* idle gnus-demon-timestep) t
+ 'gnus-demon-run-callback func))
+ ;; (func number nil)
+ ;; Call every `time'
+ ((and (numberp time) (null idle))
+ (run-with-timer t time 'gnus-demon-run-callback func)))))
+ (when timer
+ (add-to-list 'gnus-demon-timers timer)))))
(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-use-demon 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* ((date (current-time-string))
- (dv (timezone-parse-date date))
- (tdate (timezone-make-arpa-date
- (string-to-number (aref dv 0))
- (string-to-number (aref dv 1))
- (string-to-number (aref dv 2)) time
- (or (aref dv 4) "UT")))
- (nseconds (gnus-time-minus
- (gnus-encode-date tdate) (gnus-encode-date date))))
- (round
- (/ (+ (if (< (car nseconds) 0)
- 86400 0)
- (* 65536 (car nseconds))
- (nth 1 nseconds))
- 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
- (unless (window-minibuffer-p (selected-window))
- ;; Then we go through all the handler and call those that are
- ;; sufficiently ripe.
- (let ((handlers gnus-demon-handler-state)
- 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
- (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.
- )
- ((not (numberp idle))
- ;; We want to call this handler each and every time that
- ;; Emacs is idle.
- (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)
- (progn
- (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 t))
-
-(defun gnus-demon-scan-nocem ()
- "Scan NoCeM groups for NoCeM messages."
- (save-window-excursion
- (gnus-nocem-scan-groups)))
+ (dolist (timer gnus-demon-timers)
+ (nnheader-cancel-timer timer))
+ (setq gnus-demon-timers nil))
(defun gnus-demon-add-disconnection ()
"Add daemonic server disconnection to Gnus."
(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)
+ 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-demon-add-handler 'gnus-demon-scan-news 120 60))
(defun gnus-demon-scan-news ()
- (save-window-excursion
- (when (gnus-alive-p)
- (save-excursion
- (set-buffer gnus-group-buffer)
- (gnus-group-get-new-news)))))
+ (let ((win (current-window-configuration)))
+ (unwind-protect
+ (save-window-excursion
+ (when (gnus-alive-p)
+ (with-current-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."
projects / gnus / blobdiff