278 lines
9.1 KiB
EmacsLisp
278 lines
9.1 KiB
EmacsLisp
;;; gnus-demon.el --- daemonic Gnus behavior -*- lexical-binding: t; -*-
|
|
|
|
;; Copyright (C) 1995-2024 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 <https://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;;; Code:
|
|
|
|
(eval-when-compile (require 'cl-lib))
|
|
|
|
(require 'gnus)
|
|
(require 'gnus-int)
|
|
(require 'nnheader)
|
|
(require 'nntp)
|
|
(require 'nnmail)
|
|
|
|
(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 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."
|
|
: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."
|
|
:type 'integer)
|
|
|
|
;;; Internal variables.
|
|
|
|
(defvar gnus-demon-timers nil
|
|
"Plist of idle timers which are running.")
|
|
(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-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."
|
|
(float-time (or (current-idle-time) 0)))
|
|
|
|
(defun gnus-demon-run-callback (func &optional idle time special)
|
|
"Run FUNC if Emacs has been idle for longer than IDLE seconds.
|
|
If not, and a TIME is given, restart a new idle timer, so FUNC
|
|
can be called at the next opportunity. Such a special idle run
|
|
is marked with SPECIAL."
|
|
(unless gnus-inhibit-demon
|
|
(cl-block run-callback
|
|
(when (eq idle t)
|
|
(setq idle 0.001))
|
|
(cond (special
|
|
(setq gnus-demon-timers
|
|
(plist-put gnus-demon-timers func
|
|
(run-with-timer time time 'gnus-demon-run-callback
|
|
func idle time))))
|
|
((and idle (> idle (gnus-demon-idle-since)))
|
|
(when time
|
|
(cancel-timer (plist-get gnus-demon-timers func))
|
|
(setq gnus-demon-timers
|
|
(plist-put gnus-demon-timers func
|
|
(run-with-idle-timer idle nil
|
|
'gnus-demon-run-callback
|
|
func idle time t))))
|
|
(cl-return-from run-callback)))
|
|
(with-local-quit
|
|
(ignore-errors
|
|
(funcall func))))))
|
|
|
|
(defun gnus-demon-init ()
|
|
"Initialize the Gnus daemon."
|
|
(interactive)
|
|
(gnus-demon-cancel)
|
|
(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)
|
|
nil)
|
|
((stringp time)
|
|
(* (gnus-demon-time-to-step time) gnus-demon-timestep))
|
|
(t
|
|
(* time gnus-demon-timestep))))
|
|
(idle (cond ((numberp idle)
|
|
(* idle gnus-demon-timestep))
|
|
((and (eq idle t) (numberp time))
|
|
time)
|
|
(t
|
|
idle)))
|
|
|
|
(timer
|
|
(cond
|
|
;; (func nil number)
|
|
;; Only call when Emacs has been idle for `idle'
|
|
((and (null time) (numberp idle))
|
|
(run-with-idle-timer idle t 'gnus-demon-run-callback func))
|
|
;; (func number any)
|
|
;; Call every `time'
|
|
((integerp time)
|
|
(run-with-timer time time 'gnus-demon-run-callback
|
|
func idle time))
|
|
;; (func string any)
|
|
((stringp time)
|
|
(run-with-timer time (* 24 60 60) 'gnus-demon-run-callback
|
|
func idle)))))
|
|
(when timer
|
|
(setq gnus-demon-timers (plist-put gnus-demon-timers func timer))))))
|
|
|
|
(defun gnus-demon-time-to-step (time)
|
|
"Find out how many steps to TIME, which is on the form \"17:43\"."
|
|
(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 (decoded-time-hour thenParts))
|
|
(thenMin (decoded-time-minute thenParts))
|
|
;; 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.
|
|
(+ (decoded-time-day nowParts)
|
|
(if (or (< thenHour (decoded-time-hour nowParts))
|
|
(and (= thenHour
|
|
(decoded-time-hour nowParts))
|
|
(<= thenMin
|
|
(decoded-time-minute nowParts))))
|
|
1 0))
|
|
(decoded-time-month nowParts)
|
|
(decoded-time-year nowParts)
|
|
(decoded-time-weekday nowParts)
|
|
(decoded-time-dst nowParts)
|
|
(decoded-time-zone nowParts)))
|
|
(diff (float-time (time-subtract then now))))
|
|
;; Return number of timesteps in the number of seconds.
|
|
(round diff gnus-demon-timestep)))
|
|
|
|
(gnus-add-shutdown 'gnus-demon-cancel 'gnus)
|
|
|
|
(defun gnus-demon-cancel ()
|
|
"Cancel any Gnus daemons."
|
|
(interactive)
|
|
(dotimes (i (/ (length gnus-demon-timers) 2))
|
|
(cancel-timer (nth (1+ (* i 2)) gnus-demon-timers)))
|
|
(setq gnus-demon-timers nil))
|
|
|
|
(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 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
|
|
(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."
|
|
(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)
|
|
|
|
;;; gnus-demon.el ends here
|