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c2dbd52982
This lays the groundwork to allow shared workers, nested workers (i.e. workers owned by workers) and service workers to function independently of WebContent.
101 lines
3.9 KiB
C++
101 lines
3.9 KiB
C++
/*
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* Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/SharedWorker.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Event.h>
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#include <LibWeb/HTML/EventLoop/EventLoop.h>
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#include <LibWeb/HTML/EventNames.h>
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#include <LibWeb/HTML/MessageEvent.h>
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#include <LibWeb/HTML/MessagePort.h>
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#include <LibWeb/HTML/Scripting/Environments.h>
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#include <LibWeb/HTML/SharedWorker.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/HTML/Worker.h>
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#include <LibWeb/TrustedTypes/RequireTrustedTypesForDirective.h>
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#include <LibWeb/TrustedTypes/TrustedTypePolicy.h>
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namespace Web::HTML {
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GC_DEFINE_ALLOCATOR(SharedWorker);
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// https://html.spec.whatwg.org/multipage/workers.html#dom-sharedworker
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WebIDL::ExceptionOr<GC::Ref<SharedWorker>> SharedWorker::construct_impl(JS::Realm& realm, TrustedTypes::TrustedScriptURLOrString const& script_url, Variant<String, Bindings::WorkerOptions>& options_value)
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{
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// 1. Let compliantScriptURL be the result of invoking the get trusted type compliant string algorithm with
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// TrustedScriptURL, this's relevant global object, scriptURL, "SharedWorker constructor", and "script".
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auto const compliant_script_url = TRY(get_trusted_type_compliant_string(
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TrustedTypes::TrustedTypeName::TrustedScriptURL,
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realm.global_object(),
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script_url,
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TrustedTypes::InjectionSink::SharedWorker_constructor,
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TrustedTypes::Script.to_string()));
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// 2. If options is a DOMString, set options to a new WorkerOptions dictionary whose name member is set to the
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// value of options and whose other members are set to their default values.
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auto options = options_value.visit(
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[&](String& options) {
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return Bindings::WorkerOptions { .name = move(options) };
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},
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[&](Bindings::WorkerOptions& options) {
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return move(options);
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});
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// 3. Let outside settings be this's relevant settings object.
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// FIXME: We don't have a `this` yet, so use the current settings object, as the previous spec did.
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auto& outside_settings = current_settings_object();
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// 4. Let urlRecord be the result of encoding-parsing a URL given compliantScriptURL, relative to outsideSettings.
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auto url = outside_settings.encoding_parse_url(compliant_script_url.to_utf8_but_should_be_ported_to_utf16());
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// 5. If urlRecord is failure, then throw a "SyntaxError" DOMException.
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if (!url.has_value())
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return WebIDL::SyntaxError::create(realm, "SharedWorker constructed with invalid URL"_utf16);
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// 6. Let outsidePort be a new MessagePort in outsideSettings's realm.
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auto outside_port = MessagePort::create(outside_settings.realm());
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// 10. Let worker be this.
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// AD-HOC: We do this first so that we can use `this`.
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// 7. Set this's port to outsidePort.
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auto worker = realm.create<SharedWorker>(realm, url.release_value(), options, outside_port);
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// 10. Let worker be this.
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// NB: This is done earlier.
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// 11. Enqueue the following steps to the shared worker manager:
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// The actual shared worker manager is owned by the UI process. It will either start a new
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// WebWorker agent or transfer this port to an existing same-key SharedWorkerGlobalScope.
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run_a_worker(worker, worker->m_script_url, outside_settings, outside_port, worker->m_options);
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return worker;
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}
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SharedWorker::SharedWorker(JS::Realm& realm, URL::URL script_url, Bindings::WorkerOptions options, MessagePort& port)
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: DOM::EventTarget(realm)
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, m_script_url(move(script_url))
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, m_options(move(options))
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, m_port(port)
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{
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}
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SharedWorker::~SharedWorker() = default;
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void SharedWorker::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(SharedWorker);
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Base::initialize(realm);
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}
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void SharedWorker::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_port);
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visitor.visit(m_agent);
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}
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}
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