Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/Streams/ReadableStreamGenericReader.cpp

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2023, Matthew Olsson <mattco@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibJS/Runtime/Promise.h>
+#include <LibJS/Runtime/PromiseCapability.h>
+#include <LibWeb/Streams/AbstractOperations.h>
+#include <LibWeb/Streams/ReadableStream.h>
+#include <LibWeb/Streams/ReadableStreamGenericReader.h>
+#include <LibWeb/WebIDL/Promise.h>
+
+namespace Web::Streams {
+
+// https://streams.spec.whatwg.org/#generic-reader-closed
+JS::GCPtr<WebIDL::Promise> ReadableStreamGenericReaderMixin::closed()
+{
+    // 1. Return this.[[closedPromise]].
+    return m_closed_promise;
+}
+
+// https://streams.spec.whatwg.org/#generic-reader-cancel
+JS::NonnullGCPtr<WebIDL::Promise> ReadableStreamGenericReaderMixin::cancel(JS::Value reason)
+{
+    // 1. If this.[[stream]] is undefined, return a promise rejected with a TypeError exception.
+    if (!m_stream) {
+        WebIDL::SimpleException exception { WebIDL::SimpleExceptionType::TypeError, "No stream present to cancel"sv };
+        return WebIDL::create_rejected_promise_from_exception(m_realm, move(exception));
+    }
+
+    // 2. Return ! ReadableStreamReaderGenericCancel(this, reason).
+    return readable_stream_reader_generic_cancel(*this, reason);
+}
+
+ReadableStreamGenericReaderMixin::ReadableStreamGenericReaderMixin(JS::Realm& realm)
+    : m_realm(realm)
+{
+}
+
+void ReadableStreamGenericReaderMixin::visit_edges(JS::Cell::Visitor& visitor)
+{
+    visitor.visit(m_closed_promise);
+    visitor.visit(m_stream);
+    visitor.visit(m_realm);
+}
+
+}