Add twmn module for switching notifications on and off

bumblebee/modules/twmn.py

@@ -0,0 +1,39 @@
+#pylint: disable=C0111,R0903
+
+"""Toggle twmn notifications."""
+
+import bumblebee.input
+import bumblebee.output
+import bumblebee.engine
+
+
+class Module(bumblebee.engine.Module):
+    def __init__(self, engine, config):
+        super(Module, self).__init__(engine, config,
+                bumblebee.output.Widget(full_text="")
+        )
+        self._paused = False
+        # Make sure that twmn is currently not paused
+        try:
+            bumblebee.util.execute("killall -SIGUSR2 twmnd")
+        except:
+            pass
+        engine.input.register_callback(self, button=bumblebee.input.LEFT_MOUSE,
+                cmd=self.toggle_status
+        )
+
+    def toggle_status(self, event):
+        self._paused = not self._paused
+
+        try:
+            if self._paused:
+                bumblebee.util.execute("systemctl --user start twmnd")
+            else:
+                bumblebee.util.execute("systemctl --user stop twmnd")
+        except:
+            self._paused = not self._paused # toggling failed
+
+    def state(self, widget):
+        if self._paused:
+            return ["muted"]
+        return ["unmuted"]