osu-lazer/osu.Game.Rulesets.Mania/Mods/ManiaModHidden.cs

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using System;
using System.Linq;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Rulesets.Mania.Objects;
using osu.Game.Rulesets.Mania.UI;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.UI;
using osuTK;

namespace osu.Game.Rulesets.Mania.Mods
{
    public class ManiaModHidden : ModHidden, IApplicableToDrawableRuleset<ManiaHitObject>
    {
        public override string Description => @"Keys fade out before you hit them!";
        public override double ScoreMultiplier => 1;
        public override Type[] IncompatibleMods => new[] { typeof(ModFlashlight<ManiaHitObject>) };

        public virtual void ApplyToDrawableRuleset(DrawableRuleset<ManiaHitObject> drawableRuleset)
        {
            ManiaPlayfield maniaPlayfield = (ManiaPlayfield)drawableRuleset.Playfield;

            foreach (Column column in maniaPlayfield.Stages.SelectMany(stage => stage.Columns))
            {
                HitObjectContainer hoc = column.HitObjectArea.HitObjectContainer;
                Container hocParent = (Container)hoc.Parent;

                hocParent.Remove(hoc);
                hocParent.Add(CreateCover(hoc).With(c =>
                {
                    c.RelativeSizeAxes = Axes.Both;
                    c.Coverage = 0.5f;
                }));
            }
        }

        protected virtual PlayfieldCoveringWrapper CreateCover(Drawable content) => new ModHiddenCoveringWrapper(content);

        private class ModHiddenCoveringWrapper : PlayfieldCoveringWrapper
        {
            public ModHiddenCoveringWrapper(Drawable content)
                : base(content)
            {
                // This cover extends outwards from the hit position.
                Cover.Scale = new Vector2(1, -1);
            }
        }
    }
}