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b927d7f658
Noone needs to use this any more :^) This is somewhat AD-HOC in the constructor as it is based on an open shadow realm merge request, but applies the intent of the change without any change in behaviour.
86 lines
3.2 KiB
C++
86 lines
3.2 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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// https://github.com/tc39/proposal-shadowrealm/pull/392
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static ThrowCompletionOr<NonnullGCPtr<Object>> initialize_shadow_realm(ShadowRealm& object)
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{
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auto& vm = object.vm();
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// 1. Let context be the running Javascript execution context.
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auto& context = vm.running_execution_context();
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// 2. Let realm be the Realm of context.
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auto& realm = *context.realm;
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// 3. Return ? HostInitializeShadowRealm(realm, context, O).
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if (vm.host_initialize_shadow_realm)
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return TRY(vm.host_initialize_shadow_realm(realm, context.copy(), object));
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// AD-HOC: Fallback for when there is no host defined implementation.
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vm.pop_execution_context();
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object.set_shadow_realm(*vm.running_execution_context().realm);
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return Object::create(realm, realm.intrinsics().object_prototype());
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}
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// 3.2.1 ShadowRealm ( ), https://tc39.es/proposal-shadowrealm/#sec-shadowrealm
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// https://github.com/tc39/proposal-shadowrealm/pull/392
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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. Perform ? InitializeHostDefinedRealm(). The customizations for creating the global object are to return ? InitializeShadowRealm().
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// 4. Let context be the running Javascript execution context.
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auto context = TRY(Realm::initialize_host_defined_realm(vm, [&object](JS::Realm&) -> JS::Object* { return MUST(initialize_shadow_realm(object)); }, nullptr));
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// 5. Let realmRec be the Realm of context.
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auto& realm_record = *context->realm;
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// 6. Set O.[[ShadowRealm]] to realmRec.
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object->set_shadow_realm(realm_record);
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// 7. Return O.
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return object;
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}
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}
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