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https://github.com/RGBCube/serenity
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f3117d46dc
This is a continuation of the previous five commits. A first big step into the direction of no longer having to pass a realm (or currently, a global object) trough layers upon layers of AOs! Unlike the create() APIs we can safely assume that this is only ever called when a running execution context and therefore current realm exists. If not, you can always manually allocate the Error and put it in a Completion :^) In the spec, throw exceptions implicitly use the current realm's intrinsics as well: https://tc39.es/ecma262/#sec-throw-an-exception
56 lines
2.1 KiB
C++
56 lines
2.1 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/HeadersIteratorWrapper.h>
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#include <LibWeb/Bindings/Wrapper.h>
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#include <LibWeb/Fetch/HeadersIterator.h>
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namespace Web::Fetch {
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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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auto& global_object = wrapper()->global_object();
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auto& vm = global_object.vm();
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auto& realm = *global_object.associated_realm();
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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(global_object, 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(global_object, JS::js_string(vm, StringView { pair.name }), false);
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case JS::Object::PropertyKind::Value:
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return create_iterator_result_object(global_object, JS::js_string(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::js_string(vm, StringView { pair.name }), JS::js_string(vm, StringView { pair.value }) });
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return create_iterator_result_object(global_object, 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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void HeadersIterator::visit_edges(JS::Cell::Visitor& visitor)
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{
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visitor.visit(m_headers.wrapper());
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}
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}
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