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/HTMLDialogElement.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/ARIA/Roles.h>
+#include <LibWeb/HTML/HTMLElement.h>
+#include <LibWeb/HTML/ToggleTaskTracker.h>
+
+namespace Web::HTML {
+
+class HTMLDialogElement final : public HTMLElement {
+    WEB_PLATFORM_OBJECT(HTMLDialogElement, HTMLElement);
+    JS_DECLARE_ALLOCATOR(HTMLDialogElement);
+
+public:
+    virtual ~HTMLDialogElement() override;
+
+    virtual void removed_from(Node*) override;
+
+    String return_value() const;
+    void set_return_value(String);
+
+    WebIDL::ExceptionOr<void> show();
+    WebIDL::ExceptionOr<void> show_modal();
+    void close(Optional<String> return_value);
+
+    // https://www.w3.org/TR/html-aria/#el-dialog
+    virtual Optional<ARIA::Role> default_role() const override { return ARIA::Role::dialog; }
+
+    bool is_modal() const { return m_is_modal; }
+
+private:
+    HTMLDialogElement(DOM::Document&, DOM::QualifiedName);
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(Cell::Visitor&) override;
+
+    void queue_a_dialog_toggle_event_task(String old_state, String new_state);
+
+    void close_the_dialog(Optional<String> result);
+
+    void run_dialog_focusing_steps();
+
+    String m_return_value;
+    bool m_is_modal { false };
+    JS::GCPtr<CloseWatcher> m_close_watcher;
+
+    // https://html.spec.whatwg.org/multipage/interactive-elements.html#dialog-toggle-task-tracker
+    Optional<ToggleTaskTracker> m_dialog_toggle_task_tracker;
+};
+
+}