core: Add DisplayObject::path

core/src/avm1/globals/movie_clip.rs

@@ -106,7 +106,7 @@ pub fn create_proto<'gc>(
             1.0.into()
         },
         "toString" => |movie_clip: MovieClip<'gc>, _context: &mut UpdateContext<'_, 'gc, '_>, _cell: DisplayObject<'gc>, _args| -> ReturnValue<'gc> {
-            movie_clip.name().to_string().into()
+            movie_clip.path().into()
         }
     );
 

core/src/display_object.rs

@@ -206,6 +206,17 @@ pub trait TDisplayObject<'gc>: 'gc + Collect + Debug {
     );
     fn name(&self) -> Ref<str>;
     fn set_name(&mut self, context: MutationContext<'gc, '_>, name: &str);
+    /// Returns the dot-syntax path to this display object, e.g. `_level0.foo.clip`
+    fn path(&self) -> String {
+        if let Some(parent) = self.parent() {
+            let mut path = parent.path();
+            path.push_str(".");
+            path.push_str(&*self.name());
+            path
+        } else {
+            self.name().to_string()
+        }
+    }
     fn clip_depth(&self) -> Depth;
     fn set_clip_depth(&mut self, context: MutationContext<'gc, '_>, depth: Depth);
     fn parent(&self) -> Option<DisplayObject<'gc>>;

core/src/player.rs

@@ -214,7 +214,8 @@ impl<Audio: AudioBackend, Renderer: RenderBackend, Navigator: NavigatorBackend>
         player.gc_arena.mutate(|gc_context, gc_root| {
             let root_data = gc_root.0.write(gc_context);
             let mut root = root_data.root;
-            root.post_instantiation(gc_context, root, root_data.avm.prototypes().movie_clip)
+            root.post_instantiation(gc_context, root, root_data.avm.prototypes().movie_clip);
+            root.set_name(gc_context, "_level0");
         });
 
         player.build_matrices();