/*

 * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#pragma once

#include <LibWeb/HTML/HTMLElement.h>

#include <LibWeb/HTML/Navigable.h>

namespace Web::HTML {

class NavigableContainer : public HTMLElement {

    WEB_PLATFORM_OBJECT(NavigableContainer, HTMLElement);

public:

    static JS::GCPtr<NavigableContainer> navigable_container_with_content_navigable(JS::NonnullGCPtr<Navigable> navigable);

    virtual ~NavigableContainer() override;

    static HashTable<NavigableContainer*>& all_instances();

    JS::GCPtr<Navigable> content_navigable() { return m_content_navigable; }

    JS::GCPtr<Navigable const> content_navigable() const { return m_content_navigable.ptr(); }

    BrowsingContext* nested_browsing_context()

    {

        if (m_content_navigable)

            return m_content_navigable->active_browsing_context();

        return nullptr;

    }

    BrowsingContext const* nested_browsing_context() const

    {

        if (m_content_navigable)

            return m_content_navigable->active_browsing_context();

        return nullptr;

    }

    const DOM::Document* content_document() const;

    DOM::Document const* content_document_without_origin_check() const;

    HTML::WindowProxy* content_window();

    DOM::Document const* get_svg_document() const;

    void destroy_the_child_navigable();

    // All elements that extend NavigableContainer "potentially delay the load event".

    // (embed, frame, iframe, and object)

    // https://html.spec.whatwg.org/multipage/iframe-embed-object.html#potentially-delays-the-load-event

    bool currently_delays_the_load_event() const;

    bool content_navigable_initialized() const { return m_content_navigable_initialized; }

protected:

    NavigableContainer(DOM::Document&, DOM::QualifiedName);

    virtual void visit_edges(Cell::Visitor&) override;

    // https://html.spec.whatwg.org/multipage/iframe-embed-object.html#shared-attribute-processing-steps-for-iframe-and-frame-elements

    Optional<URL::URL> shared_attribute_processing_steps_for_iframe_and_frame(bool initial_insertion);

    // https://html.spec.whatwg.org/multipage/iframe-embed-object.html#navigate-an-iframe-or-frame

    void navigate_an_iframe_or_frame(URL::URL url, ReferrerPolicy::ReferrerPolicy referrer_policy, Optional<String> srcdoc_string = {});

    WebIDL::ExceptionOr<void> create_new_child_navigable(JS::GCPtr<JS::HeapFunction<void()>> after_session_history_update = {});

    // https://html.spec.whatwg.org/multipage/document-sequences.html#content-navigable

    JS::GCPtr<Navigable> m_content_navigable { nullptr };

    void set_potentially_delays_the_load_event(bool value) { m_potentially_delays_the_load_event = value; }

    void set_content_navigable_initialized() { m_content_navigable_initialized = true; }

private:

    virtual bool is_navigable_container() const override { return true; }

    bool m_potentially_delays_the_load_event { true };

    bool m_content_navigable_initialized { false };

};

}

namespace Web::DOM {

template<>

inline bool Node::fast_is<HTML::NavigableContainer>() const { return is_navigable_container(); }

}