avm2: Implement QName call handler

core/src/avm2/globals/QName.as

@@ -1,5 +1,6 @@
 package {
     [Ruffle(InstanceAllocator)]
+    [Ruffle(CallHandler)]
     public final class QName {
         public static const length = 2;
         

core/src/avm2/globals/q_name.rs

@@ -8,6 +8,33 @@ use crate::avm2::Namespace;
 
 pub use crate::avm2::object::q_name_allocator;
 
+pub fn call_handler<'gc>(
+    activation: &mut Activation<'_, 'gc>,
+    _this: Object<'gc>,
+    args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error<'gc>> {
+    if args.len() == 1 {
+        // 1. If Namespace is not specified and Type(Name) is Object and Name.[[Class]] == “QName”
+        if args[0]
+            .as_object()
+            .and_then(|x| x.as_qname_object())
+            .is_some()
+        {
+            // 1.a. Return Name
+            return Ok(args[0]);
+        }
+    }
+
+    // 2. Create and return a new QName object exactly as if the QName constructor had been called with the
+    //    same arguments (section 13.3.2).
+    Ok(activation
+        .avm2()
+        .classes()
+        .qname
+        .construct(activation, args)?
+        .into())
+}
+
 /// Implements `QName`'s `init` method, which is called from the constructor.
 pub fn init<'gc>(
     activation: &mut Activation<'_, 'gc>,

tests/tests/swfs/from_avmplus/e4x/QName/e13_3_1/test.toml

@@ -1,2 +1 @@
 num_ticks = 1
-known_failure = true # https://github.com/ruffle-rs/ruffle/issues/12356

tests/tests/swfs/from_avmplus/e4x/Types/e9_1_1_1/test.toml

@@ -1,2 +1 @@
 num_ticks = 1
-known_failure = true

tests/tests/swfs/from_avmplus/e4x/XML/e13_4_4_22/test.toml

@@ -1,2 +1 @@
 num_ticks = 1
-known_failure = true