stop playback immediately on window close

src/playbin.vala

@@ -362,6 +362,15 @@ public class Playbin : GLib.Object {
         }
     }
 
+    public void stop () {
+        debug ("stopping playback");
+        // don't clear the playlist, just in case (less state changes to sync)
+        assert(this.mpv.command({"stop", "keep-playlist"}) >= 0);
+        this.state = PlaybinState.STOPPED;
+        this.play_queue_position = this._play_queue.get_n_items ();
+        this.stopped ();
+    }
+
     ~Playbin () {
         debug ("destroying playbin");
     }

src/ui/window.vala

@@ -116,6 +116,12 @@ class Ui.Window : Adw.ApplicationWindow {
         return stack_child != "play-queue";
     }
 
+    public override bool close_request () {
+        // stop playback on close
+        this.playbin.stop ();
+        return false;
+    }
+
     ~Window () {
         debug ("destroying main window");
     }