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https://github.com/RGBCube/serenity
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LibWeb+LibJS: Make the EventTarget hierarchy (incl. DOM) GC-allocated
This is a monster patch that turns all EventTargets into GC-allocated PlatformObjects. Their C++ wrapper classes are removed, and the LibJS garbage collector is now responsible for their lifetimes. There's a fair amount of hacks and band-aids in this patch, and we'll have a lot of cleanup to do after this.
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445 changed files with 4797 additions and 4268 deletions
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@ -16,8 +16,9 @@
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#include <LibJS/Runtime/FunctionObject.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibTextCodec/Decoder.h>
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#include <LibWeb/Bindings/BlobWrapper.h>
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#include <LibWeb/Bindings/IDLAbstractOperations.h>
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#include <LibWeb/Bindings/XMLHttpRequestWrapper.h>
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#include <LibWeb/Bindings/XMLHttpRequestPrototype.h>
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#include <LibWeb/DOM/DOMException.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Event.h>
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@ -40,19 +41,31 @@
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namespace Web::XHR {
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JS::NonnullGCPtr<XMLHttpRequest> XMLHttpRequest::create_with_global_object(HTML::Window& window)
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{
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return *window.heap().allocate<XMLHttpRequest>(window.realm(), window);
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}
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XMLHttpRequest::XMLHttpRequest(HTML::Window& window)
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: XMLHttpRequestEventTarget()
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: XMLHttpRequestEventTarget(window.realm())
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, m_window(window)
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, m_response_type(Bindings::XMLHttpRequestResponseType::Empty)
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{
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set_prototype(&window.ensure_web_prototype<Bindings::XMLHttpRequestPrototype>("XMLHttpRequest"));
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}
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XMLHttpRequest::~XMLHttpRequest() = default;
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void XMLHttpRequest::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_window.ptr());
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}
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void XMLHttpRequest::set_ready_state(ReadyState ready_state)
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{
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m_ready_state = ready_state;
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dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(wrapper()->global_object()), EventNames::readystatechange));
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dispatch_event(*DOM::Event::create(global_object(), EventNames::readystatechange));
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}
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void XMLHttpRequest::fire_progress_event(String const& event_name, u64 transmitted, u64 length)
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@ -61,7 +74,7 @@ void XMLHttpRequest::fire_progress_event(String const& event_name, u64 transmitt
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event_init.length_computable = true;
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event_init.loaded = transmitted;
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event_init.total = length;
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dispatch_event(*ProgressEvent::create(verify_cast<Bindings::WindowObject>(wrapper()->global_object()), event_name, event_init));
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dispatch_event(*ProgressEvent::create(global_object(), event_name, event_init));
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}
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// https://xhr.spec.whatwg.org/#dom-xmlhttprequest-responsetext
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@ -81,17 +94,14 @@ DOM::ExceptionOr<String> XMLHttpRequest::response_text() const
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// https://xhr.spec.whatwg.org/#response
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DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
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{
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auto& vm = wrapper()->vm();
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auto& realm = *vm.current_realm();
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// 1. If this’s response type is the empty string or "text", then:
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if (m_response_type == Bindings::XMLHttpRequestResponseType::Empty || m_response_type == Bindings::XMLHttpRequestResponseType::Text) {
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// 1. If this’s state is not loading or done, then return the empty string.
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if (m_ready_state != ReadyState::Loading && m_ready_state != ReadyState::Done)
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return JS::Value(JS::js_string(vm, ""));
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return JS::Value(JS::js_string(vm(), ""));
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// 2. Return the result of getting a text response for this.
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return JS::Value(JS::js_string(vm, get_text_response()));
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return JS::Value(JS::js_string(vm(), get_text_response()));
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}
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// 2. If this’s state is not done, then return null.
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if (m_ready_state != ReadyState::Done)
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@ -108,7 +118,7 @@ DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
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// 5. If this’s response type is "arraybuffer",
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if (m_response_type == Bindings::XMLHttpRequestResponseType::Arraybuffer) {
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// then set this’s response object to a new ArrayBuffer object representing this’s received bytes. If this throws an exception, then set this’s response object to failure and return null.
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auto buffer_result = JS::ArrayBuffer::create(realm, m_received_bytes.size());
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auto buffer_result = JS::ArrayBuffer::create(realm(), m_received_bytes.size());
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if (buffer_result.is_error()) {
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m_response_object = Failure();
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return JS::js_null();
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@ -122,7 +132,7 @@ DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
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else if (m_response_type == Bindings::XMLHttpRequestResponseType::Blob) {
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auto blob_part = TRY_OR_RETURN_OOM(try_make_ref_counted<FileAPI::Blob>(m_received_bytes, get_final_mime_type().type()));
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auto blob = TRY(FileAPI::Blob::create(Vector<FileAPI::BlobPart> { move(blob_part) }));
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m_response_object = JS::make_handle(JS::Value(blob->create_wrapper(realm)));
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m_response_object = JS::make_handle(JS::Value(wrap(realm(), *blob)));
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}
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// 7. Otherwise, if this’s response type is "document", set a document response for this.
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else if (m_response_type == Bindings::XMLHttpRequestResponseType::Document) {
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@ -142,7 +152,7 @@ DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
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// 3. Let jsonObject be the result of running parse JSON from bytes on this’s received bytes. If that threw an exception, then return null.
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TextCodec::UTF8Decoder decoder;
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auto json_object_result = JS::call(vm, realm.intrinsics().json_parse_function(), JS::js_undefined(), JS::js_string(vm, decoder.to_utf8({ m_received_bytes.data(), m_received_bytes.size() })));
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auto json_object_result = JS::call(vm(), realm().intrinsics().json_parse_function(), JS::js_undefined(), JS::js_string(vm(), decoder.to_utf8({ m_received_bytes.data(), m_received_bytes.size() })));
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if (json_object_result.is_error())
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return JS::Value(JS::js_null());
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@ -372,7 +382,7 @@ DOM::ExceptionOr<void> XMLHttpRequest::open(String const& method_string, String
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auto& settings_object = m_window->associated_document().relevant_settings_object();
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// 2. If settingsObject has a responsible document and it is not fully active, then throw an "InvalidStateError" DOMException.
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if (!settings_object.responsible_document().is_null() && !settings_object.responsible_document()->is_active())
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if (settings_object.responsible_document() && !settings_object.responsible_document()->is_active())
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return DOM::InvalidStateError::create("Invalid state: Responsible document is not fully active.");
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// 3. If method is not a method, then throw a "SyntaxError" DOMException.
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@ -468,7 +478,7 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
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if (should_enforce_same_origin_policy && !m_window->associated_document().origin().is_same_origin(request_url_origin)) {
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dbgln("XHR failed to load: Same-Origin Policy violation: {} may not load {}", m_window->associated_document().url(), request_url);
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set_ready_state(ReadyState::Done);
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dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(wrapper()->global_object()), HTML::EventNames::error));
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dispatch_event(*DOM::Event::create(global_object(), HTML::EventNames::error));
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return {};
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}
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@ -518,8 +528,8 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
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// See: https://github.com/whatwg/fetch/issues/1142
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ResourceLoader::the().load(
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request,
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[weak_this = make_weak_ptr()](auto data, auto& response_headers, auto status_code) {
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auto strong_this = weak_this.strong_ref();
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[weak_this = make_weak_ptr<XMLHttpRequest>()](auto data, auto& response_headers, auto status_code) {
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JS::GCPtr<XMLHttpRequest> strong_this = weak_this.ptr();
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if (!strong_this)
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return;
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auto& xhr = const_cast<XMLHttpRequest&>(*weak_this);
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@ -538,27 +548,27 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
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xhr.m_status = status_code.value_or(0);
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xhr.m_response_headers = move(response_headers);
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xhr.m_send = false;
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xhr.dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(xhr.wrapper()->global_object()), EventNames::readystatechange));
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xhr.dispatch_event(*DOM::Event::create(xhr.global_object(), EventNames::readystatechange));
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xhr.fire_progress_event(EventNames::load, transmitted, length);
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xhr.fire_progress_event(EventNames::loadend, transmitted, length);
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},
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[weak_this = make_weak_ptr()](auto& error, auto status_code) {
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[weak_this = make_weak_ptr<XMLHttpRequest>()](auto& error, auto status_code) {
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dbgln("XHR failed to load: {}", error);
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auto strong_this = weak_this.strong_ref();
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JS::GCPtr<XMLHttpRequest> strong_this = weak_this.ptr();
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if (!strong_this)
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return;
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auto& xhr = const_cast<XMLHttpRequest&>(*strong_this);
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xhr.set_ready_state(ReadyState::Done);
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xhr.set_status(status_code.value_or(0));
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xhr.dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(xhr.wrapper()->global_object()), HTML::EventNames::error));
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xhr.dispatch_event(*DOM::Event::create(xhr.global_object(), HTML::EventNames::error));
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},
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m_timeout,
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[weak_this = make_weak_ptr()] {
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auto strong_this = weak_this.strong_ref();
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[weak_this = make_weak_ptr<XMLHttpRequest>()] {
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JS::GCPtr<XMLHttpRequest> strong_this = weak_this.ptr();
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if (!strong_this)
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return;
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auto& xhr = const_cast<XMLHttpRequest&>(*strong_this);
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xhr.dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(xhr.wrapper()->global_object()), EventNames::timeout));
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xhr.dispatch_event(*DOM::Event::create(xhr.global_object(), EventNames::timeout));
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});
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} else {
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TODO();
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return {};
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}
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JS::Object* XMLHttpRequest::create_wrapper(JS::Realm& realm)
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{
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return wrap(realm, *this);
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}
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Bindings::CallbackType* XMLHttpRequest::onreadystatechange()
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{
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return event_handler_attribute(Web::XHR::EventNames::readystatechange);
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{
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// 1. If the current global object is a Window object and this’s synchronous flag is set,
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// then throw an "InvalidAccessError" DOMException.
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if (is<Bindings::WindowObject>(HTML::current_global_object()) && m_synchronous)
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if (is<HTML::Window>(HTML::current_global_object()) && m_synchronous)
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return DOM::InvalidAccessError::create("Use of XMLHttpRequest's timeout attribute is not supported in the synchronous mode in window context.");
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// 2. Set this’s timeout to the given value.
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