new mini-lib: jao-sleep (actions on suspend/awake)

1 files changed, 58 insertions, 0 deletions

diff --git a/sys/jao-sleep.el b/sys/jao-sleep.el
new file mode 100644
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--- /dev/null
+++ b/sys/jao-sleep.el
@@ -0,0 +1,58 @@
+;;; jao-sleep.el --- Actions upon sleep/awake        -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020  jao
+
+;; Author: jao <mail@jao.io>
+;; Keywords: hardware
+
+;; This program 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.
+
+;; This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'dbus)
+
+(defvar jao-sleep-sleep-functions nil)
+(defvar jao-sleep-awake-functions nil)
+
+(defvar jao-sleep--dbus-registration-object nil)
+
+(defun jao-sleep--dbus-sleep-handler (sleep-start)
+  (condition-case nil
+      (if sleep-start
+          (progn (message "Running on sleep functions")
+                 (run-hooks 'jao-sleep-sleep-functions))
+        (message "Running on awake functions")
+        (run-hooks 'jao-sleep-awake-functions))
+      (error (message "There was an error running %s" sleep-start))))
+
+;;;###autoload
+(defun jao-sleep-dbus-register (&optional session-dbus)
+  "Register actions to take on sleep and on awake, using the system D-BUS."
+  (when (featurep 'dbusbind)
+    (setq jao-sleep--dbus-sleep-registration-object
+	  (dbus-register-signal (if session-dbus :session :system)
+				"org.freedesktop.login1"
+				"/org/freedesktop/login1"
+				"org.freedesktop.login1.Manager"
+				"PrepareForSleep"
+				#'jao-sleep--dbus-sleep-handler))))
+
+;;;###autoload
+(defun jao-sleep-dbus-unregister ()
+  (condition-case nil
+      (dbus-unregister-object jao-sleep--dbus-sleep-registration-object)
+    (wrong-type-argument nil)))
+
+(provide 'jao-sleep)
+;;; jao-sleep.el ends here