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/HTML/ElementInternals.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2024, the Ladybird developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/WeakPtr.h>
+#include <LibJS/Heap/GCPtr.h>
+#include <LibWeb/Bindings/PlatformObject.h>
+#include <LibWeb/Forward.h>
+
+namespace Web::HTML {
+
+// https://html.spec.whatwg.org/multipage/custom-elements.html#elementinternals
+class ElementInternals final : public Bindings::PlatformObject {
+    WEB_PLATFORM_OBJECT(ElementInternals, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(ElementInternals);
+
+public:
+    static JS::NonnullGCPtr<ElementInternals> create(JS::Realm&, HTMLElement& target_element);
+
+    JS::GCPtr<DOM::ShadowRoot> shadow_root() const;
+
+private:
+    explicit ElementInternals(JS::Realm&, HTMLElement& target_element);
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(JS::Cell::Visitor& visitor) override;
+
+    // https://html.spec.whatwg.org/multipage/custom-elements.html#internals-target
+    JS::NonnullGCPtr<HTMLElement> m_target_element;
+};
+
+}