ladybird/Userland/Libraries/LibWeb/Streams/CountQueuingStrategy.h

/*
 * Copyright (c) 2023, Shannon Booth <shannon@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/Forward.h>
#include <LibJS/Forward.h>
#include <LibWeb/Bindings/PlatformObject.h>
#include <LibWeb/Forward.h>
#include <LibWeb/Streams/QueuingStrategyInit.h>

namespace Web::Streams {

// https://streams.spec.whatwg.org/#countqueuingstrategy
class CountQueuingStrategy final : public Bindings::PlatformObject {
    WEB_PLATFORM_OBJECT(CountQueuingStrategy, Bindings::PlatformObject);
    JS_DECLARE_ALLOCATOR(CountQueuingStrategy);

public:
    static WebIDL::ExceptionOr<JS::NonnullGCPtr<CountQueuingStrategy>> construct_impl(JS::Realm&, QueuingStrategyInit const&);

    virtual ~CountQueuingStrategy() override;

    // https://streams.spec.whatwg.org/#cqs-high-water-mark
    double high_water_mark() const
    {
        // The highWaterMark getter steps are:
        // 1. Return this.[[highWaterMark]].
        return m_high_water_mark;
    }

    WebIDL::ExceptionOr<JS::NonnullGCPtr<WebIDL::CallbackType>> size();

private:
    explicit CountQueuingStrategy(JS::Realm&, double high_water_mark);

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

    // https://streams.spec.whatwg.org/#countqueuingstrategy-highwatermark
    double m_high_water_mark { 0 };
};

}