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71 lines
2.2 KiB
EmacsLisp
71 lines
2.2 KiB
EmacsLisp
;;; gnus-dbus.el --- DBUS integration for Gnus -*- lexical-binding: t; -*-
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;; Copyright (C) 2020-2023 Free Software Foundation, Inc.
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;; Author: Eric Abrahamsen <eric@ericabrahamsen.net>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This library contains some Gnus integration for systems using DBUS.
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;; At present it registers a signal to close all Gnus servers before
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;; system sleep or hibernation.
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;;; Code:
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(require 'gnus)
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(require 'dbus)
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(declare-function gnus-close-all-servers "gnus-start")
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(defcustom gnus-dbus-close-on-sleep nil
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"When non-nil, close Gnus servers on system sleep."
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:group 'gnus-dbus
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:type 'boolean)
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(defvar gnus-dbus-sleep-registration-object nil
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"Object returned from `dbus-register-signal'.
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Used to unregister the signal.")
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(defun gnus-dbus-register-sleep-signal ()
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"Use `dbus-register-signal' to close servers on sleep."
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(when (featurep 'dbusbind)
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(setq gnus-dbus-sleep-registration-object
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(dbus-register-signal :system
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"org.freedesktop.login1"
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"/org/freedesktop/login1"
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"org.freedesktop.login1.Manager"
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"PrepareForSleep"
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#'gnus-dbus-sleep-handler))
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(gnus-add-shutdown #'gnus-dbus-unregister-sleep-signal 'gnus)))
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(defun gnus-dbus-sleep-handler (sleep-start)
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;; Sleep-start is t before sleeping.
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(when (and sleep-start
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(gnus-alive-p))
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(condition-case nil
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(gnus-close-all-servers)
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(error nil))))
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(defun gnus-dbus-unregister-sleep-signal ()
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(condition-case nil
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(dbus-unregister-object
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gnus-dbus-sleep-registration-object)
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(wrong-type-argument nil)))
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(provide 'gnus-dbus)
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;;; gnus-dbus.el ends here
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