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LibWeb: Allow creating a MessagePort with a different primary interface

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This is needed to transfer streams, which use message ports as the means
of transport.
This commit is contained in:
Timothy Flynn
2025-04-18 16:22:31 -04:00
committed by Tim Flynn
parent 36da270dbe
commit ee9d860ba2
Notes: github-actions[bot] 2025-05-21 10:56:14 +00:00 
Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/ee9d860ba29
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4828
Reviewed-by: https://github.com/shannonbooth ✅
2 changed files with 11 additions and 7 deletions
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11
Libraries/LibWeb/HTML/MessagePort.h
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@@ -20,13 +20,14 @@
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/web-messaging.html#message-ports
class MessagePort final : public DOM::EventTarget
class MessagePort final
: public DOM::EventTarget
, public Bindings::Transferable {
WEB_PLATFORM_OBJECT(MessagePort, DOM::EventTarget);
GC_DECLARE_ALLOCATOR(MessagePort);
public:
[[nodiscard]] static GC::Ref<MessagePort> create(JS::Realm&);
[[nodiscard]] static GC::Ref<MessagePort> create(JS::Realm&, HTML::TransferType primary_interface = HTML::TransferType::MessagePort);
static void for_each_message_port(Function<void(MessagePort&)>);
@@ -59,14 +60,14 @@ public:
// ^Transferable
virtual WebIDL::ExceptionOr<void> transfer_steps(HTML::TransferDataHolder&) override;
virtual WebIDL::ExceptionOr<void> transfer_receiving_steps(HTML::TransferDataHolder&) override;
virtual HTML::TransferType primary_interface() const override { return HTML::TransferType::MessagePort; }
virtual HTML::TransferType primary_interface() const override { return m_primary_interface; }
void set_worker_event_target(GC::Ref<DOM::EventTarget>);
WebIDL::ExceptionOr<void> message_port_post_message_steps(GC::Ptr<MessagePort> target_port, JS::Value message, StructuredSerializeOptions const& options);
private:
explicit MessagePort(JS::Realm&);
explicit MessagePort(JS::Realm&, HTML::TransferType primary_interface);
virtual void initialize(JS::Realm&) override;
virtual void finalize() override;
@@ -79,6 +80,8 @@ private:
ErrorOr<void> send_message_on_transport(SerializedTransferRecord const&);
void read_from_transport();
HTML::TransferType m_primary_interface { HTML::TransferType::MessagePort };
// The HTML spec implies(!) that this is MessagePort.[[RemotePort]]
GC::Ptr<MessagePort> m_remote_port;