ladybird/Userland/Libraries/LibWeb/HTML/HTMLMeterElement.h

/*
 * Copyright (c) 2020, the SerenityOS developers.
 * Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
 * Copyright (c) 2023, Bastiaan van der Plaat <bastiaan.v.d.plaat@gmail.com>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <LibWeb/ARIA/Roles.h>
#include <LibWeb/HTML/HTMLDivElement.h>
#include <LibWeb/HTML/HTMLElement.h>
#include <LibWeb/Namespace.h>

namespace Web::HTML {

class MeterBarElement final : public HTMLDivElement {
    JS_CELL(MeterBarElement, HTMLDivElement);

public:
    MeterBarElement(DOM::Document& document)
        : HTMLDivElement(document, DOM::QualifiedName { HTML::TagNames::div, ""_fly_string, Namespace::HTML })
    {
    }
    virtual Optional<CSS::Selector::PseudoElement> pseudo_element() const override { return CSS::Selector::PseudoElement::MeterBar; }
};

class MeterValueElement final : public HTMLDivElement {
    JS_CELL(MeterValueElement, HTMLDivElement);

public:
    MeterValueElement(DOM::Document& document)
        : HTMLDivElement(document, DOM::QualifiedName { HTML::TagNames::div, ""_fly_string, Namespace::HTML })
    {
    }
    virtual Optional<CSS::Selector::PseudoElement> pseudo_element() const override { return m_pseudo_element; }

    void set_pseudo_element(CSS::Selector::PseudoElement pseudo_element) { m_pseudo_element = pseudo_element; }

private:
    CSS::Selector::PseudoElement m_pseudo_element;
};

class HTMLMeterElement final : public HTMLElement {
    WEB_PLATFORM_OBJECT(HTMLMeterElement, HTMLElement);
    JS_DECLARE_ALLOCATOR(HTMLMeterElement);

public:
    virtual ~HTMLMeterElement() override;

    double value() const;
    WebIDL::ExceptionOr<void> set_value(double);
    double min() const;
    WebIDL::ExceptionOr<void> set_min(double value);
    double max() const;
    WebIDL::ExceptionOr<void> set_max(double value);
    double low() const;
    WebIDL::ExceptionOr<void> set_low(double value);
    double high() const;
    WebIDL::ExceptionOr<void> set_high(double value);
    double optimum() const;
    WebIDL::ExceptionOr<void> set_optimum(double value);

    // ^HTMLElement
    virtual void inserted() override;
    virtual void removed_from(DOM::Node*) override;

    // https://html.spec.whatwg.org/multipage/forms.html#category-label
    virtual bool is_labelable() const override { return true; }

    // https://www.w3.org/TR/html-aria/#el-meter
    virtual Optional<ARIA::Role> default_role() const override { return ARIA::Role::meter; }

private:
    HTMLMeterElement(DOM::Document&, DOM::QualifiedName);

    virtual void initialize(JS::Realm&) override;
    virtual void visit_edges(Cell::Visitor&) override;

    void create_shadow_tree_if_needed();

    void update_meter_value_element();

    JS::GCPtr<MeterValueElement> m_meter_value_element;
};

}