/*

 * Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>

 * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>

 *

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

 */

#pragma once

#include <LibWeb/Bindings/PlatformObject.h>

#include <LibWeb/Forward.h>

#include <LibWeb/WebIDL/Types.h>

namespace Web::DOM {

// https://dom.spec.whatwg.org/#abstractrange

class AbstractRange : public Bindings::PlatformObject {

    WEB_PLATFORM_OBJECT(AbstractRange, Bindings::PlatformObject);

public:

    virtual ~AbstractRange() override;

    Node* start_container() { return m_start_container.ptr(); }

    Node const* start_container() const { return m_start_container.ptr(); }

    WebIDL::UnsignedLong start_offset() const { return m_start_offset; }

    Node* end_container() { return m_end_container.ptr(); }

    Node const* end_container() const { return m_end_container.ptr(); }

    WebIDL::UnsignedLong end_offset() const { return m_end_offset; }

    // https://dom.spec.whatwg.org/#range-collapsed

    bool collapsed() const

    {

        // A range is collapsed if its start node is its end node and its start offset is its end offset.

        return start_container() == end_container() && start_offset() == end_offset();

    }

protected:

    AbstractRange(Node& start_container, WebIDL::UnsignedLong start_offset, Node& end_container, WebIDL::UnsignedLong end_offset);

    virtual void initialize(JS::Realm&) override;

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

    JS::NonnullGCPtr<Node> m_start_container;

    WebIDL::UnsignedLong m_start_offset;

    JS::NonnullGCPtr<Node> m_end_container;

    WebIDL::UnsignedLong m_end_offset;

};

}