avm2: Implement flash.net.FileReference name

core/src/avm2/globals/flash/net/FileReference.as

@@ -11,7 +11,6 @@ package flash.net
         private var _creator: String;
         private var _extension: String;
         private var _modificationDate: Date;
-        private var _name: String;
         private static var _permissionStatus: String;
         private var _size: Number;
         private var _type: String;
@@ -38,9 +37,7 @@ package flash.net
             return this._modificationDate;
         }   
 
-        public function get name(): String {
-            return this._name;
-        }   
+        public native function get name(): String;
 
         public static function get permissionStatus(): String {
             return FileReference._permissionStatus;

core/src/avm2/globals/flash/net/file_reference.rs

@@ -4,6 +4,7 @@ pub use crate::avm2::object::file_reference_allocator;
 use crate::avm2::object::{ByteArrayObject, FileReference};
 use crate::avm2::{Activation, Avm2, Error, EventObject, Object, TObject, Value};
 use crate::backend::ui::FileFilter;
+use crate::string::AvmString;
 
 pub fn get_data<'gc>(
     activation: &mut Activation<'_, 'gc>,
@@ -25,6 +26,24 @@ pub fn get_data<'gc>(
     Ok(bytearray.into())
 }
 
+pub fn get_name<'gc>(
+    activation: &mut Activation<'_, 'gc>,
+    this: Object<'gc>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error<'gc>> {
+    let this = this.as_file_reference().unwrap();
+
+    let name = match *this.file_reference() {
+        FileReference::None => return Err(make_error_2037(activation)),
+        FileReference::FileDialogResult(ref dialog_result) => {
+            let name = dialog_result.file_name().unwrap_or_default();
+            AvmString::new_utf8(activation.context.gc_context, name).into()
+        }
+    };
+
+    Ok(name)
+}
+
 pub fn browse<'gc>(
     activation: &mut Activation<'_, 'gc>,
     this: Object<'gc>,