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/HTMLFrameSetElement.cpp

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/HTMLFrameSetElementPrototype.h>
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/HTML/HTMLFrameSetElement.h>
+#include <LibWeb/HTML/Window.h>
+
+namespace Web::HTML {
+
+JS_DEFINE_ALLOCATOR(HTMLFrameSetElement);
+
+HTMLFrameSetElement::HTMLFrameSetElement(DOM::Document& document, DOM::QualifiedName qualified_name)
+    : HTMLElement(document, move(qualified_name))
+{
+}
+
+HTMLFrameSetElement::~HTMLFrameSetElement() = default;
+
+void HTMLFrameSetElement::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(HTMLFrameSetElement);
+}
+
+void HTMLFrameSetElement::attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value)
+{
+    HTMLElement::attribute_changed(name, old_value, value);
+
+#undef __ENUMERATE
+#define __ENUMERATE(attribute_name, event_name)                     \
+    if (name == HTML::AttributeNames::attribute_name) {             \
+        element_event_handler_attribute_changed(event_name, value); \
+    }
+    ENUMERATE_WINDOW_EVENT_HANDLERS(__ENUMERATE)
+#undef __ENUMERATE
+}
+
+JS::GCPtr<DOM::EventTarget> HTMLFrameSetElement::global_event_handlers_to_event_target(FlyString const& event_name)
+{
+    // NOTE: This is a little weird, but IIUC document.body.onload actually refers to window.onload
+    // NOTE: document.body can return either a HTMLBodyElement or HTMLFrameSetElement, so both these elements must support this mapping.
+    if (DOM::is_window_reflecting_body_element_event_handler(event_name))
+        return document().window();
+
+    return *this;
+}
+
+JS::GCPtr<DOM::EventTarget> HTMLFrameSetElement::window_event_handlers_to_event_target()
+{
+    // All WindowEventHandlers on HTMLFrameSetElement (e.g. document.body.onrejectionhandled) are mapped to window.on{event}.
+    // NOTE: document.body can return either a HTMLBodyElement or HTMLFrameSetElement, so both these elements must support this mapping.
+    return document().window();
+}
+
+}