RobustToolbox/Robust.Client/Graphics/Overlays/IOverlayManager.cs

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using JetBrains.Annotations;
using Robust.Shared.Timing;

namespace Robust.Client.Graphics;

[PublicAPI]
public interface IOverlayManager
{
    bool AddOverlay(Overlay overlay);

    bool RemoveOverlay(Overlay overlay);
    bool RemoveOverlay(Type overlayClass);
    bool RemoveOverlay<T>() where T : Overlay;
    bool TryGetOverlay(Type overlayClass, [NotNullWhen(true)] out Overlay? overlay);
    bool TryGetOverlay<T>([NotNullWhen(true)] out T? overlay) where T : Overlay;

    Overlay GetOverlay(Type overlayClass);
    T GetOverlay<T>() where T : Overlay;

    bool HasOverlay(Type overlayClass);
    bool HasOverlay<T>() where T : Overlay;

    IEnumerable<Overlay> AllOverlays { get; }
}

internal interface IOverlayManagerInternal : IOverlayManager
{
    void FrameUpdate(FrameEventArgs args);
}