avm2: Make all domain object construction (save for the global domain) pull the constructor and call it in `from_domain`.

This also adds `DomainObject::script_global`, which does the same thing but picks the `global` class instead of `ApplicationDomain`.

core/src/avm2/globals/flash/display/loaderinfo.rs

@@ -79,31 +79,21 @@ pub fn application_domain<'gc>(
 ) -> Result<Value<'gc>, Error> {
     if let Some(this) = this {
         if let Some(loader_stream) = this.as_loader_stream() {
-            let appdomain_proto = activation.avm2().prototypes().application_domain;
-            let appdomain_constr = activation.avm2().constructors().application_domain;
-
             match &*loader_stream {
                 LoaderStream::Stage => {
                     return Ok(DomainObject::from_domain(
-                        activation.context.gc_context,
-                        appdomain_constr,
-                        Some(appdomain_proto),
+                        activation,
                         activation.context.avm2.global_domain(),
-                    )
+                    )?
                     .into());
                 }
                 LoaderStream::Swf(movie, _) => {
-                    let library = activation
+                    let domain = activation
                         .context
                         .library
-                        .library_for_movie_mut(movie.clone());
-                    return Ok(DomainObject::from_domain(
-                        activation.context.gc_context,
-                        appdomain_constr,
-                        Some(appdomain_proto),
-                        library.avm2_domain(),
-                    )
-                    .into());
+                        .library_for_movie_mut(movie.clone())
+                        .avm2_domain();
+                    return Ok(DomainObject::from_domain(activation, domain)?.into());
                 }
             }
         }

core/src/avm2/globals/flash/system/application_domain.rs

@@ -39,17 +39,9 @@ pub fn current_domain<'gc>(
 ) -> Result<Value<'gc>, Error> {
     let globals = activation.scope().map(|s| s.read().globals());
     let appdomain = globals.and_then(|g| g.as_application_domain());
-    let appdomain_proto = activation.avm2().prototypes().application_domain;
-    let appdomain_constr = activation.avm2().constructors().application_domain;
 
     if let Some(appdomain) = appdomain {
-        return Ok(DomainObject::from_domain(
-            activation.context.gc_context,
-            appdomain_constr,
-            Some(appdomain_proto),
-            appdomain,
-        )
-        .into());
+        return Ok(DomainObject::from_domain(activation, appdomain)?.into());
     }
 
     Ok(Value::Undefined)
@@ -63,16 +55,7 @@ pub fn parent_domain<'gc>(
 ) -> Result<Value<'gc>, Error> {
     if let Some(appdomain) = this.and_then(|this| this.as_application_domain()) {
         if let Some(parent_domain) = appdomain.parent_domain() {
-            let appdomain_proto = activation.avm2().prototypes().application_domain;
-            let appdomain_constr = activation.avm2().constructors().application_domain;
-
-            return Ok(DomainObject::from_domain(
-                activation.context.gc_context,
-                appdomain_constr,
-                Some(appdomain_proto),
-                parent_domain,
-            )
-            .into());
+            return Ok(DomainObject::from_domain(activation, parent_domain)?.into());
         }
     }
 

core/src/avm2/object/domain_object.rs

@@ -28,8 +28,13 @@ pub fn appdomain_deriver<'gc>(
         .globals()
         .as_application_domain()
         .ok_or("Constructor scope must have an appdomain at the bottom of it's scope stack")?;
+    let base = ScriptObjectData::base_new(Some(proto), ScriptObjectClass::ClassInstance(constr));
 
-    DomainObject::derive(constr, proto, domain, activation.context.gc_context)
+    Ok(DomainObject(GcCell::allocate(
+        activation.context.gc_context,
+        DomainObjectData { base, domain },
+    ))
+    .into())
 }
 
 #[derive(Clone, Collect, Debug, Copy)]
@@ -58,28 +63,53 @@ impl<'gc> DomainObject<'gc> {
         DomainObject(GcCell::allocate(mc, DomainObjectData { base, domain })).into()
     }
 
+    /// Create a new object for a given domain.
+    ///
+    /// This function will call instance initializers. You do not need to do so
+    /// yourself.
     pub fn from_domain(
-        mc: MutationContext<'gc, '_>,
-        constr: Object<'gc>,
-        base_proto: Option<Object<'gc>>,
+        activation: &mut Activation<'_, 'gc, '_>,
         domain: Domain<'gc>,
-    ) -> Object<'gc> {
-        let base = ScriptObjectData::base_new(base_proto, ScriptObjectClass::ClassInstance(constr));
+    ) -> Result<Object<'gc>, Error> {
+        let constr = activation.avm2().constructors().application_domain;
+        let proto = activation.avm2().prototypes().application_domain;
+        let base =
+            ScriptObjectData::base_new(Some(proto), ScriptObjectClass::ClassInstance(constr));
+        let this = DomainObject(GcCell::allocate(
+            activation.context.gc_context,
+            DomainObjectData { base, domain },
+        ))
+        .into();
 
-        DomainObject(GcCell::allocate(mc, DomainObjectData { base, domain })).into()
+        constr.call_initializer(Some(this), &[], activation, Some(constr))?;
+
+        Ok(this)
     }
 
-    /// Construct a primitive subclass.
-    pub fn derive(
-        constr: Object<'gc>,
-        base_proto: Object<'gc>,
+    /// Create a new object for a given script's global scope.
+    ///
+    /// The `domain` object will serve as the scope of last resort should the
+    /// global scope not have a particular name defined.
+    ///
+    /// This function will call instance initializers. You do not need to do so
+    /// yourself.
+    pub fn script_global(
+        activation: &mut Activation<'_, 'gc, '_>,
         domain: Domain<'gc>,
-        mc: MutationContext<'gc, '_>,
     ) -> Result<Object<'gc>, Error> {
+        let constr = activation.avm2().constructors().global;
+        let proto = activation.avm2().prototypes().global;
         let base =
-            ScriptObjectData::base_new(Some(base_proto), ScriptObjectClass::ClassInstance(constr));
+            ScriptObjectData::base_new(Some(proto), ScriptObjectClass::ClassInstance(constr));
+        let this = DomainObject(GcCell::allocate(
+            activation.context.gc_context,
+            DomainObjectData { base, domain },
+        ))
+        .into();
 
-        Ok(DomainObject(GcCell::allocate(mc, DomainObjectData { base, domain })).into())
+        constr.call_initializer(Some(this), &[], activation, Some(constr))?;
+
+        Ok(this)
     }
 }
 
@@ -107,11 +137,6 @@ impl<'gc> TObject<'gc> for DomainObject<'gc> {
             )?
             .coerce_to_object(activation)?;
 
-        Ok(DomainObject::from_domain(
-            activation.context.gc_context,
-            constr,
-            Some(this),
-            activation.context.avm2.global_domain(),
-        ))
+        appdomain_deriver(constr, this, activation)
     }
 }

core/src/avm2/script.rs

@@ -146,11 +146,9 @@ impl<'gc> TranslationUnit<'gc> {
 
         drop(read);
 
-        let global_proto = uc.avm2.prototypes().global;
-        let global_constr = uc.avm2.constructors().global;
-
-        let global =
-            DomainObject::from_domain(uc.gc_context, global_constr, Some(global_proto), domain);
+        let mut activation = Activation::from_nothing(uc.reborrow());
+        let global = DomainObject::script_global(&mut activation, domain)?;
+        drop(activation);
 
         let mut script = Script::from_abc_index(self, script_index, global, uc.gc_context)?;
         self.0