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0ec8af5b70
This allows us to align our implementation in the same order as the specification. No functional change with the current implementation of this AO. However, this change is required in order to correctly implement a proposed update of the shadow realm proposal for integration with the HTML spec host bindings in order to give the ShadowRealm object the correct 'intrinsic' realm. This is due to that proposed change adding a step which manipulates the currently executing Javascript execution context, making the ordering important.
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
/*
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* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/ShadowRealm.h>
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#include <LibJS/Runtime/ShadowRealmConstructor.h>
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namespace JS {
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JS_DEFINE_ALLOCATOR(ShadowRealmConstructor);
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// 3.2 The ShadowRealm Constructor, https://tc39.es/proposal-shadowrealm/#sec-shadowrealm-constructor
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ShadowRealmConstructor::ShadowRealmConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.ShadowRealm.as_string(), realm.intrinsics().function_prototype())
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{
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}
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void ShadowRealmConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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Base::initialize(realm);
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// 3.3.1 ShadowRealm.prototype, https://tc39.es/proposal-shadowrealm/#sec-shadowrealm.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().shadow_realm_prototype(), 0);
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define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
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}
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// 3.2.1 ShadowRealm ( ), https://tc39.es/proposal-shadowrealm/#sec-shadowrealm
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ThrowCompletionOr<Value> ShadowRealmConstructor::call()
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{
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auto& vm = this->vm();
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// 1. If NewTarget is undefined, throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.ShadowRealm);
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}
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// 3.2.1 ShadowRealm ( ), https://tc39.es/proposal-shadowrealm/#sec-shadowrealm
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ThrowCompletionOr<NonnullGCPtr<Object>> ShadowRealmConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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// 2. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%ShadowRealm.prototype%", « [[ShadowRealm]], [[ExecutionContext]] »).
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auto object = TRY(ordinary_create_from_constructor<ShadowRealm>(vm, new_target, &Intrinsics::shadow_realm_prototype));
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// 3. Let realmRec be CreateRealm().
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auto realm = MUST_OR_THROW_OOM(Realm::create(vm));
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// 4. Set O.[[ShadowRealm]] to realmRec.
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object->set_shadow_realm(realm);
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// 5. Let context be a new execution context.
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auto context = ExecutionContext::create();
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// 6. Set the Function of context to null.
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context->function = nullptr;
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// 7. Set the Realm of context to realmRec.
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context->realm = realm;
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// 8. Set the ScriptOrModule of context to null.
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// Note: This is already the default value.
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// 9. Set O.[[ExecutionContext]] to context.
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object->set_execution_context(move(context));
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// 10. Perform ? SetRealmGlobalObject(realmRec, undefined, undefined).
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realm->set_global_object(nullptr, nullptr);
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// 11. Perform ? SetDefaultGlobalBindings(O.[[ShadowRealm]]).
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auto& global_object = set_default_global_bindings(object->shadow_realm());
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// FIXME: 12. Perform ? HostInitializeShadowRealm(O.[[ShadowRealm]]).
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global_object.initialize(object->shadow_realm());
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// 13. Return O.
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return object;
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}
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}
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