122 lines
5.2 KiB
C++
122 lines
5.2 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 <AK/Debug.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/JobCallback.h>
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#include <LibJS/Runtime/Promise.h>
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#include <LibJS/Runtime/PromiseJobs.h>
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#include <LibJS/Runtime/PromiseReaction.h>
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namespace JS {
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PromiseReactionJob* PromiseReactionJob::create(GlobalObject& global_object, PromiseReaction& reaction, Value argument)
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{
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return global_object.heap().allocate<PromiseReactionJob>(global_object, reaction, argument, *global_object.function_prototype());
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}
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PromiseReactionJob::PromiseReactionJob(PromiseReaction& reaction, Value argument, Object& prototype)
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: NativeFunction(prototype)
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, m_reaction(reaction)
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, m_argument(argument)
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{
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}
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// 27.2.2.1 NewPromiseReactionJob ( reaction, argument ), https://tc39.es/ecma262/#sec-newpromisereactionjob
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Value PromiseReactionJob::call()
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{
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auto& vm = this->vm();
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auto& promise_capability = m_reaction.capability();
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auto type = m_reaction.type();
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auto handler = m_reaction.handler();
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Value handler_result;
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if (!handler.has_value()) {
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dbgln_if(PROMISE_DEBUG, "[PromiseReactionJob @ {}]: Handler is empty", this);
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switch (type) {
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case PromiseReaction::Type::Fulfill:
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dbgln_if(PROMISE_DEBUG, "[PromiseReactionJob @ {}]: Reaction type is Type::Fulfill, setting handler result to {}", this, m_argument);
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handler_result = m_argument;
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break;
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case PromiseReaction::Type::Reject:
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dbgln_if(PROMISE_DEBUG, "[PromiseReactionJob @ {}]: Reaction type is Type::Reject, throwing exception with argument {}", this, m_argument);
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vm.throw_exception(global_object(), m_argument);
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// handler_result is set to exception value further below
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break;
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}
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} else {
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dbgln_if(PROMISE_DEBUG, "[PromiseReactionJob @ {}]: Calling handler callback {} @ {} with argument {}", this, handler.value().callback->class_name(), handler.value().callback, m_argument);
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handler_result = call_job_callback(vm, handler.value(), js_undefined(), m_argument);
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}
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if (!promise_capability.has_value()) {
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dbgln_if(PROMISE_DEBUG, "[PromiseReactionJob @ {}]: Reaction has no PromiseCapability, returning empty value", this);
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// TODO: This can't return an empty value at the moment, because the implicit conversion to Completion would fail.
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// Change it back when this is using completions (`return normal_completion({})`)
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return js_undefined();
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}
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if (vm.exception()) {
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handler_result = vm.exception()->value();
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vm.clear_exception();
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vm.stop_unwind();
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auto* reject_function = promise_capability.value().reject;
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dbgln_if(PROMISE_DEBUG, "[PromiseReactionJob @ {}]: Calling PromiseCapability's reject function @ {}", this, reject_function);
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return TRY_OR_DISCARD(vm.call(*reject_function, js_undefined(), handler_result));
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} else {
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auto* resolve_function = promise_capability.value().resolve;
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dbgln_if(PROMISE_DEBUG, "[PromiseReactionJob @ {}]: Calling PromiseCapability's resolve function @ {}", this, resolve_function);
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return TRY_OR_DISCARD(vm.call(*resolve_function, js_undefined(), handler_result));
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}
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}
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void PromiseReactionJob::visit_edges(Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(&m_reaction);
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visitor.visit(m_argument);
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}
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PromiseResolveThenableJob* PromiseResolveThenableJob::create(GlobalObject& global_object, Promise& promise_to_resolve, Value thenable, JobCallback then)
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{
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// FIXME: A bunch of stuff regarding realms, see step 2-5 in the spec linked below
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return global_object.heap().allocate<PromiseResolveThenableJob>(global_object, promise_to_resolve, thenable, then, *global_object.function_prototype());
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}
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PromiseResolveThenableJob::PromiseResolveThenableJob(Promise& promise_to_resolve, Value thenable, JobCallback then, Object& prototype)
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: NativeFunction(prototype)
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, m_promise_to_resolve(promise_to_resolve)
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, m_thenable(thenable)
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, m_then(then)
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{
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}
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// 27.2.2.2 NewPromiseResolveThenableJob ( promiseToResolve, thenable, then ), https://tc39.es/ecma262/#sec-newpromiseresolvethenablejob
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Value PromiseResolveThenableJob::call()
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{
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auto& vm = this->vm();
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auto [resolve_function, reject_function] = m_promise_to_resolve.create_resolving_functions();
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dbgln_if(PROMISE_DEBUG, "[PromiseResolveThenableJob @ {}]: Calling then job callback for thenable {}", this, &m_thenable);
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auto then_call_result = call_job_callback(vm, m_then, m_thenable, &resolve_function, &reject_function);
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if (vm.exception()) {
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auto error = vm.exception()->value();
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vm.clear_exception();
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vm.stop_unwind();
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dbgln_if(PROMISE_DEBUG, "[PromiseResolveThenableJob @ {}]: An exception was thrown, returning error {}", this, error);
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return error;
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}
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dbgln_if(PROMISE_DEBUG, "[PromiseResolveThenableJob @ {}]: Returning then call result {}", this, then_call_result);
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return then_call_result;
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}
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void PromiseResolveThenableJob::visit_edges(Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(&m_promise_to_resolve);
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visitor.visit(m_thenable);
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visitor.visit(m_then.callback);
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}
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}
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