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[Emacs-diffs] Changes to emacs/lisp/gnus/gnus-demon.el [lexbind]
From: |
Miles Bader |
Subject: |
[Emacs-diffs] Changes to emacs/lisp/gnus/gnus-demon.el [lexbind] |
Date: |
Tue, 14 Oct 2003 19:34:53 -0400 |
Index: emacs/lisp/gnus/gnus-demon.el
diff -c /dev/null emacs/lisp/gnus/gnus-demon.el:1.7.18.1
*** /dev/null Tue Oct 14 19:34:53 2003
--- emacs/lisp/gnus/gnus-demon.el Tue Oct 14 19:34:50 2003
***************
*** 0 ****
--- 1,324 ----
+ ;;; gnus-demon.el --- daemonic Gnus behaviour
+ ;; Copyright (C) 1995,96,97,98,99 Free Software Foundation, Inc.
+
+ ;; Author: Lars Magne Ingebrigtsen <address@hidden>
+ ;; 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
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