only load thumbnails on play queue song bound

resources/window.blp

@@ -106,10 +106,6 @@ template $AudreyUiWindow: Adw.ApplicationWindow {
                           pixel-size: 160;
                           halign: center;
                           hexpand: false;
-
-                          styles [
-                            "frame"
-                          ]
                         }
 
                         Label {

src/model/song.rs

@@ -75,11 +75,7 @@ glib::wrapper! {
 }
 
 impl Song {
-    pub fn from_child(
-        window: &crate::ui::Window,
-        song: &subsonic::schema::Child,
-        load_thumbnail: bool,
-    ) -> Self {
+    pub fn from_child(window: &crate::ui::Window, song: &subsonic::schema::Child) -> Self {
         let api = window.api();
         let song: Song = Object::builder()
             .property("id", &song.id)
@@ -92,13 +88,17 @@ impl Song {
             .property("stream-url", api.stream_url(&song.id).as_str())
             .build();
 
-        if load_thumbnail {
-            let id = song.id();
-            let song_weak = song.downgrade();
+        song
+    }
+
+    pub fn need_thumbnail(&self, window: &crate::ui::Window) {
+        let api = window.api();
+        let mut thumbnail_loading = self.imp().thumbnail_loading.borrow_mut();
+        if thumbnail_loading.is_none() {
+            let id = self.id();
+            let song_weak = self.downgrade();
             let scale_factor = window.scale_factor() as u32; // NOTE: assumed constant
-            song.imp()
-                .thumbnail_loading
-                .replace(Some(glib::spawn_future_local(async move {
+            *thumbnail_loading = Some(glib::spawn_future_local(async move {
                 let _permit = SEM.acquire().await.unwrap();
 
                 let bytes = match api
@@ -122,9 +122,7 @@ impl Song {
                 song.set_thumbnail(
                     gdk::Texture::from_bytes(&glib::Bytes::from_owned(bytes)).unwrap(),
                 );
-                })));
-        }
-
-        song
+            }));
+        }
     }
 }

src/ui/play_queue/song.rs

@@ -200,6 +200,8 @@ impl Song {
         self.set_song(&song);
         self.set_position(position);
         self.set_playlist_pos(window.playlist_pos());
+
+        song.need_thumbnail(window);
     }
 
     pub fn unbind(&self) {}

src/ui/window.rs

@@ -394,7 +394,7 @@ mod imp {
                 Rc::clone(api.as_ref().unwrap())
             };
             for song in api.random_songs(500).await.unwrap().into_iter() {
-                let song = Song::from_child(&self.obj(), &song, true);
+                let song = Song::from_child(&self.obj(), &song);
                 self.mpv
                     .command(["loadfile", &song.stream_url(), "append-play"])
                     .unwrap();