- remember and restore previous playback state

- add comments

src/mpris.rs

@@ -263,11 +263,11 @@ impl MprisPlayer {
         self.event.trigger();
     }
 
-    #[dbus_interface(property)]
-    fn randomize(&self) {
+    /*#[dbus_interface(property)]
+    fn randomize(&self, _b: bool) {
         self.queue.randomize();
         self.event.trigger();
-    }
+    }*/
 
     #[dbus_interface(property)]
     fn volume(&self) -> f64 {

src/queue.rs

@@ -474,12 +474,26 @@ impl Queue {
     ///
     /// This deactivates `Shuffle`.
     pub fn randomize(&self) {
-        let mut queue = self.queue.write().unwrap();
-        queue.shuffle(&mut thread_rng());
+        // stop playlist, because we completely invalidate any playing order
+        let previous_playback_state = self.cfg.state().playback_state.clone();
+        self.stop();
 
+        // deactivate `Shuffle` feature, because it usually wouldn't make sense to use both
         if self.get_shuffle() == true {
             self.set_shuffle(false);
         }
+
+        // permutate the queue Vec
+        let mut queue = self.queue.write().unwrap();
+        queue.shuffle(&mut thread_rng());
+
+        // resetting playing position to start of queue doesn't seem necessary
+        // my guess is that stop() does that
+
+        // resume playback if we were playing before
+        if previous_playback_state == PlaybackState::Playing {
+            self.toggleplayback();
+        }
     }
 
     /// Handle events that are specific to the queue.