Don't batch download when offline mode

sublime/adapters/manager.py

@@ -866,7 +866,11 @@ class AdapterManager:
         cancelled = False
 
         def do_download_song(song_id: str):
-            if AdapterManager.is_shutting_down or cancelled:
+            if (
+                AdapterManager.is_shutting_down
+                or AdapterManager._offline_mode
+                or cancelled
+            ):
                 return
 
             assert AdapterManager._instance
@@ -915,16 +919,16 @@ class AdapterManager:
         def do_batch_download_songs():
             sleep(delay)
             for song_id in song_ids:
-                if cancelled:
+                if (
+                    AdapterManager.is_shutting_down
+                    or AdapterManager._offline_mode
+                    or cancelled
+                ):
                     return
                 # Only allow a certain number of songs to be downloaded
                 # simultaneously.
                 AdapterManager._instance.download_limiter_semaphore.acquire()
 
-                # Prevents further songs from being downloaded.
-                if AdapterManager.is_shutting_down:
-                    break
-
                 result = Result(do_download_song, song_id, is_download=True)
 
                 if one_at_a_time:

sublime/app.py

@@ -1093,7 +1093,11 @@ class SublimeMusicApp(Gtk.Application):
                 self.update_window()
 
             if (
-                self.app_config.allow_song_downloads
+                # This only makes sense if the adapter is networked.
+                AdapterManager.ground_truth_adapter_is_networked()
+                # Don't download in offline mode.
+                and not self.app_config.offline_mode
+                and self.app_config.allow_song_downloads
                 and self.app_config.download_on_stream
                 and AdapterManager.can_batch_download_songs()
             ):