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https://github.com/RGBCube/serenity
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80 lines
3 KiB
C++
80 lines
3 KiB
C++
/*
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* Copyright (c) 2021, Linus Groh <linusg@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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// 3.2 The ShadowRealm Constructor, https://tc39.es/proposal-shadowrealm/#sec-shadowrealm-constructor
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ShadowRealmConstructor::ShadowRealmConstructor(GlobalObject& global_object)
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: NativeFunction(vm().names.ShadowRealm.as_string(), *global_object.function_prototype())
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{
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}
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void ShadowRealmConstructor::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(global_object);
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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, global_object.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>(global_object(), 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<Object*> ShadowRealmConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto& global_object = this->global_object();
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// 3. Let realmRec be CreateRealm().
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auto* realm = Realm::create(vm);
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// 5. Let context be a new execution context.
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auto context = ExecutionContext { vm.heap() };
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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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// 2. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%ShadowRealm.prototype%", « [[ShadowRealm]], [[ExecutionContext]] »).
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// 4. Set O.[[ShadowRealm]] to realmRec.
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// 9. Set O.[[ExecutionContext]] to context.
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auto* object = TRY(ordinary_create_from_constructor<ShadowRealm>(global_object, new_target, &GlobalObject::shadow_realm_prototype, *realm, move(context)));
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// 10. Perform ? SetRealmGlobalObject(realmRec, undefined, undefined).
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auto* new_global_object = vm.heap().allocate_without_global_object<GlobalObject>();
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new_global_object->initialize_global_object();
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realm->set_global_object(*new_global_object, nullptr);
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// TODO: I don't think we should have these exactly like this, that doesn't work well with how
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// we create global objects. Still, it should be possible to make a ShadowRealm with a
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// non-LibJS GlobalObject somehow.
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// 11. Perform ? SetDefaultGlobalBindings(O.[[ShadowRealm]]).
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// 12. Perform ? HostInitializeShadowRealm(O.[[ShadowRealm]]).
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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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