mirror of
https://github.com/RGBCube/serenity
synced 2025-05-14 15:44:58 +00:00
47cdd90836
Resolves one FIXME where we can now pass a realm, and sets the length correctly in a bunch of places that previously didn't. Also reduces the number of "format function name string from arbitrary PropertyKey" implementations, although two more remain present in the AST (used with ECMAScriptFunctionObjects, which is a different beast).
104 lines
3.9 KiB
C++
104 lines
3.9 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
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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/Array.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/ProxyConstructor.h>
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#include <LibJS/Runtime/ProxyObject.h>
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namespace JS {
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// 10.5.14 ProxyCreate ( target, handler ), https://tc39.es/ecma262/#sec-proxycreate
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static ThrowCompletionOr<ProxyObject*> proxy_create(GlobalObject& global_object, Value target, Value handler)
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{
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auto& vm = global_object.vm();
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if (!target.is_object())
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return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyConstructorBadType, "target", target.to_string_without_side_effects());
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if (!handler.is_object())
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return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyConstructorBadType, "handler", handler.to_string_without_side_effects());
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return ProxyObject::create(global_object, target.as_object(), handler.as_object());
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}
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ProxyConstructor::ProxyConstructor(GlobalObject& global_object)
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: NativeFunction(vm().names.Proxy.as_string(), *global_object.function_prototype())
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{
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}
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void ProxyConstructor::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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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.revocable, revocable, 2, attr);
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define_direct_property(vm.names.length, Value(2), Attribute::Configurable);
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}
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ProxyConstructor::~ProxyConstructor()
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{
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}
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// 28.2.1.1 Proxy ( target, handler ), https://tc39.es/ecma262/#sec-proxy-target-handler
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ThrowCompletionOr<Value> ProxyConstructor::call()
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{
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auto& vm = this->vm();
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return vm.throw_completion<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.Proxy);
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}
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// 28.2.1.1 Proxy ( target, handler ), https://tc39.es/ecma262/#sec-proxy-target-handler
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ThrowCompletionOr<Object*> ProxyConstructor::construct(FunctionObject&)
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{
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auto& vm = this->vm();
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return TRY(proxy_create(global_object(), vm.argument(0), vm.argument(1)));
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}
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// 28.2.2.1 Proxy.revocable ( target, handler ), https://tc39.es/ecma262/#sec-proxy.revocable
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JS_DEFINE_NATIVE_FUNCTION(ProxyConstructor::revocable)
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{
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// 1. Let p be ? ProxyCreate(target, handler).
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auto* proxy = TRY(proxy_create(global_object, vm.argument(0), vm.argument(1)));
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// 2. Let revokerClosure be a new Abstract Closure with no parameters that captures nothing and performs the following steps when called:
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auto revoker_closure = [proxy_handle = make_handle(proxy)](auto&, auto&) -> ThrowCompletionOr<Value> {
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// a. Let F be the active function object.
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// b. Let p be F.[[RevocableProxy]].
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auto& proxy = const_cast<ProxyObject&>(*proxy_handle.cell());
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// c. If p is null, return undefined.
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if (proxy.is_revoked())
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return js_undefined();
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// d. Set F.[[RevocableProxy]] to null.
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// e. Assert: p is a Proxy object.
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// f. Set p.[[ProxyTarget]] to null.
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// g. Set p.[[ProxyHandler]] to null.
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proxy.revoke();
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// h. Return undefined.
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return js_undefined();
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};
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// 3. Let revoker be ! CreateBuiltinFunction(revokerClosure, 0, "", « [[RevocableProxy]] »).
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// 4. Set revoker.[[RevocableProxy]] to p.
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auto* revoker = NativeFunction::create(global_object, move(revoker_closure), 0, "");
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// 5. Let result be ! OrdinaryObjectCreate(%Object.prototype%).
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auto* result = Object::create(global_object, global_object.object_prototype());
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// 6. Perform ! CreateDataPropertyOrThrow(result, "proxy", p).
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MUST(result->create_data_property_or_throw(vm.names.proxy, proxy));
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// 7. Perform ! CreateDataPropertyOrThrow(result, "revoke", revoker).
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MUST(result->create_data_property_or_throw(vm.names.revoke, revoker));
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// 8. Return result.
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return result;
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}
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}
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