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LibWeb+LibJS: Make the EventTarget hierarchy (incl. DOM) GC-allocated

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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.
This commit is contained in:
Andreas Kling 2022-08-28 13:42:07 +02:00
parent bb547ce1c4
commit 6f433c8656
445 changed files with 4797 additions and 4268 deletions
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63
Userland/Libraries/LibWeb/XHR/XMLHttpRequest.cpp
View file

@ -16,8 +16,9 @@
#include <LibJS/Runtime/FunctionObject.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibTextCodec/Decoder.h>
#include <LibWeb/Bindings/BlobWrapper.h>
#include <LibWeb/Bindings/IDLAbstractOperations.h>
#include <LibWeb/Bindings/XMLHttpRequestWrapper.h>
#include <LibWeb/Bindings/XMLHttpRequestPrototype.h>
#include <LibWeb/DOM/DOMException.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Event.h>
@ -40,19 +41,31 @@
namespace Web::XHR {
JS::NonnullGCPtr<XMLHttpRequest> XMLHttpRequest::create_with_global_object(HTML::Window& window)
{
return *window.heap().allocate<XMLHttpRequest>(window.realm(), window);
}
XMLHttpRequest::XMLHttpRequest(HTML::Window& window)
: XMLHttpRequestEventTarget()
: XMLHttpRequestEventTarget(window.realm())
, m_window(window)
, m_response_type(Bindings::XMLHttpRequestResponseType::Empty)
{
set_prototype(&window.ensure_web_prototype<Bindings::XMLHttpRequestPrototype>("XMLHttpRequest"));
}
XMLHttpRequest::~XMLHttpRequest() = default;
void XMLHttpRequest::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_window.ptr());
}
void XMLHttpRequest::set_ready_state(ReadyState ready_state)
{
m_ready_state = ready_state;
dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(wrapper()->global_object()), EventNames::readystatechange));
dispatch_event(*DOM::Event::create(global_object(), EventNames::readystatechange));
}
void XMLHttpRequest::fire_progress_event(String const& event_name, u64 transmitted, u64 length)
@ -61,7 +74,7 @@ void XMLHttpRequest::fire_progress_event(String const& event_name, u64 transmitt
event_init.length_computable = true;
event_init.loaded = transmitted;
event_init.total = length;
dispatch_event(*ProgressEvent::create(verify_cast<Bindings::WindowObject>(wrapper()->global_object()), event_name, event_init));
dispatch_event(*ProgressEvent::create(global_object(), event_name, event_init));
}
// https://xhr.spec.whatwg.org/#dom-xmlhttprequest-responsetext
@ -81,17 +94,14 @@ DOM::ExceptionOr<String> XMLHttpRequest::response_text() const
// https://xhr.spec.whatwg.org/#response
DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
{
auto& vm = wrapper()->vm();
auto& realm = *vm.current_realm();
// 1. If this’s response type is the empty string or "text", then:
if (m_response_type == Bindings::XMLHttpRequestResponseType::Empty || m_response_type == Bindings::XMLHttpRequestResponseType::Text) {
// 1. If this’s state is not loading or done, then return the empty string.
if (m_ready_state != ReadyState::Loading && m_ready_state != ReadyState::Done)
return JS::Value(JS::js_string(vm, ""));
return JS::Value(JS::js_string(vm(), ""));
// 2. Return the result of getting a text response for this.
return JS::Value(JS::js_string(vm, get_text_response()));
return JS::Value(JS::js_string(vm(), get_text_response()));
}
// 2. If this’s state is not done, then return null.
if (m_ready_state != ReadyState::Done)
@ -108,7 +118,7 @@ DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
// 5. If this’s response type is "arraybuffer",
if (m_response_type == Bindings::XMLHttpRequestResponseType::Arraybuffer) {
// 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.
auto buffer_result = JS::ArrayBuffer::create(realm, m_received_bytes.size());
auto buffer_result = JS::ArrayBuffer::create(realm(), m_received_bytes.size());
if (buffer_result.is_error()) {
m_response_object = Failure();
return JS::js_null();
@ -122,7 +132,7 @@ DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
else if (m_response_type == Bindings::XMLHttpRequestResponseType::Blob) {
auto blob_part = TRY_OR_RETURN_OOM(try_make_ref_counted<FileAPI::Blob>(m_received_bytes, get_final_mime_type().type()));
auto blob = TRY(FileAPI::Blob::create(Vector<FileAPI::BlobPart> { move(blob_part) }));
m_response_object = JS::make_handle(JS::Value(blob->create_wrapper(realm)));
m_response_object = JS::make_handle(JS::Value(wrap(realm(), *blob)));
}
// 7. Otherwise, if this’s response type is "document", set a document response for this.
else if (m_response_type == Bindings::XMLHttpRequestResponseType::Document) {
@ -142,7 +152,7 @@ DOM::ExceptionOr<JS::Value> XMLHttpRequest::response()
// 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.
TextCodec::UTF8Decoder decoder;
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() })));
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() })));
if (json_object_result.is_error())
return JS::Value(JS::js_null());
@ -372,7 +382,7 @@ DOM::ExceptionOr<void> XMLHttpRequest::open(String const& method_string, String
auto& settings_object = m_window->associated_document().relevant_settings_object();
// 2. If settingsObject has a responsible document and it is not fully active, then throw an "InvalidStateError" DOMException.
if (!settings_object.responsible_document().is_null() && !settings_object.responsible_document()->is_active())
if (settings_object.responsible_document() && !settings_object.responsible_document()->is_active())
return DOM::InvalidStateError::create("Invalid state: Responsible document is not fully active.");
// 3. If method is not a method, then throw a "SyntaxError" DOMException.
@ -468,7 +478,7 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
if (should_enforce_same_origin_policy && !m_window->associated_document().origin().is_same_origin(request_url_origin)) {
dbgln("XHR failed to load: Same-Origin Policy violation: {} may not load {}", m_window->associated_document().url(), request_url);
set_ready_state(ReadyState::Done);
dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(wrapper()->global_object()), HTML::EventNames::error));
dispatch_event(*DOM::Event::create(global_object(), HTML::EventNames::error));
return {};
}
@ -518,8 +528,8 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
// See: https://github.com/whatwg/fetch/issues/1142
ResourceLoader::the().load(
request,
[weak_this = make_weak_ptr()](auto data, auto& response_headers, auto status_code) {
auto strong_this = weak_this.strong_ref();
[weak_this = make_weak_ptr<XMLHttpRequest>()](auto data, auto& response_headers, auto status_code) {
JS::GCPtr<XMLHttpRequest> strong_this = weak_this.ptr();
if (!strong_this)
return;
auto& xhr = const_cast<XMLHttpRequest&>(*weak_this);
@ -538,27 +548,27 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
xhr.m_status = status_code.value_or(0);
xhr.m_response_headers = move(response_headers);
xhr.m_send = false;
xhr.dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(xhr.wrapper()->global_object()), EventNames::readystatechange));
xhr.dispatch_event(*DOM::Event::create(xhr.global_object(), EventNames::readystatechange));
xhr.fire_progress_event(EventNames::load, transmitted, length);
xhr.fire_progress_event(EventNames::loadend, transmitted, length);
},
[weak_this = make_weak_ptr()](auto& error, auto status_code) {
[weak_this = make_weak_ptr<XMLHttpRequest>()](auto& error, auto status_code) {
dbgln("XHR failed to load: {}", error);
auto strong_this = weak_this.strong_ref();
JS::GCPtr<XMLHttpRequest> strong_this = weak_this.ptr();
if (!strong_this)
return;
auto& xhr = const_cast<XMLHttpRequest&>(*strong_this);
xhr.set_ready_state(ReadyState::Done);
xhr.set_status(status_code.value_or(0));
xhr.dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(xhr.wrapper()->global_object()), HTML::EventNames::error));
xhr.dispatch_event(*DOM::Event::create(xhr.global_object(), HTML::EventNames::error));
},
m_timeout,
[weak_this = make_weak_ptr()] {
auto strong_this = weak_this.strong_ref();
[weak_this = make_weak_ptr<XMLHttpRequest>()] {
JS::GCPtr<XMLHttpRequest> strong_this = weak_this.ptr();
if (!strong_this)
return;
auto& xhr = const_cast<XMLHttpRequest&>(*strong_this);
xhr.dispatch_event(*DOM::Event::create(verify_cast<Bindings::WindowObject>(xhr.wrapper()->global_object()), EventNames::timeout));
xhr.dispatch_event(*DOM::Event::create(xhr.global_object(), EventNames::timeout));
});
} else {
TODO();
@ -566,11 +576,6 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
return {};
}
JS::Object* XMLHttpRequest::create_wrapper(JS::Realm& realm)
{
return wrap(realm, *this);
}
Bindings::CallbackType* XMLHttpRequest::onreadystatechange()
{
return event_handler_attribute(Web::XHR::EventNames::readystatechange);
@ -621,7 +626,7 @@ DOM::ExceptionOr<void> XMLHttpRequest::set_timeout(u32 timeout)
{
// 1. If the current global object is a Window object and this’s synchronous flag is set,
// then throw an "InvalidAccessError" DOMException.
if (is<Bindings::WindowObject>(HTML::current_global_object()) && m_synchronous)
if (is<HTML::Window>(HTML::current_global_object()) && m_synchronous)
return DOM::InvalidAccessError::create("Use of XMLHttpRequest's timeout attribute is not supported in the synchronous mode in window context.");
// 2. Set this’s timeout to the given value.