mirror of
https://github.com/RGBCube/serenity
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834202aeb9
This needs to happen before prototype/constructor intitialization can be made lazy. Otherwise, GC could run during the C++ constructor and try to collect the object currently being created.
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
/*
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* Copyright (c) 2022, 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/IteratorOperations.h>
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#include <LibWeb/Bindings/HeadersIteratorPrototype.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Fetch/HeadersIterator.h>
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namespace Web::Bindings {
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template<>
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void Intrinsics::create_web_prototype_and_constructor<HeadersIteratorPrototype>(JS::Realm& realm)
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{
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auto prototype = heap().allocate<HeadersIteratorPrototype>(realm, realm);
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m_prototypes.set("HeadersIterator"sv, prototype);
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}
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}
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namespace Web::Fetch {
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JS::NonnullGCPtr<HeadersIterator> HeadersIterator::create(Headers const& headers, JS::Object::PropertyKind iteration_kind)
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{
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return headers.heap().allocate<HeadersIterator>(headers.realm(), headers, iteration_kind);
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}
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HeadersIterator::HeadersIterator(Headers const& headers, JS::Object::PropertyKind iteration_kind)
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: PlatformObject(headers.realm())
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, m_headers(headers)
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, m_iteration_kind(iteration_kind)
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{
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}
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HeadersIterator::~HeadersIterator() = default;
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void HeadersIterator::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::HeadersIteratorPrototype>(realm, "HeadersIterator"));
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}
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void HeadersIterator::visit_edges(JS::Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(&m_headers);
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}
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// https://webidl.spec.whatwg.org/#es-iterable, Step 2
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JS::ThrowCompletionOr<JS::Object*> HeadersIterator::next()
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{
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// The value pairs to iterate over are the return value of running sort and combine with this’s header list.
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auto value_pairs_to_iterate_over = [&]() -> JS::ThrowCompletionOr<Vector<Fetch::Infrastructure::Header>> {
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auto headers_or_error = m_headers.m_header_list->sort_and_combine();
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if (headers_or_error.is_error())
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return vm().throw_completion<JS::InternalError>(JS::ErrorType::NotEnoughMemoryToAllocate);
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return headers_or_error.release_value();
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};
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auto pairs = TRY(value_pairs_to_iterate_over());
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if (m_index >= pairs.size())
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return create_iterator_result_object(vm(), JS::js_undefined(), true);
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auto const& pair = pairs[m_index++];
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switch (m_iteration_kind) {
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case JS::Object::PropertyKind::Key:
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return create_iterator_result_object(vm(), JS::PrimitiveString::create(vm(), StringView { pair.name }), false);
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case JS::Object::PropertyKind::Value:
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return create_iterator_result_object(vm(), JS::PrimitiveString::create(vm(), StringView { pair.value }), false);
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case JS::Object::PropertyKind::KeyAndValue: {
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auto array = JS::Array::create_from(realm(), { JS::PrimitiveString::create(vm(), StringView { pair.name }), JS::PrimitiveString::create(vm(), StringView { pair.value }) });
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return create_iterator_result_object(vm(), array, false);
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}
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default:
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VERIFY_NOT_REACHED();
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}
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}
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}
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