osu/osu.Game/Skinning/LegacySkin.cs

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using System;
using System.IO;
using System.Linq;
using osu.Framework.Audio;
using osu.Framework.Audio.Sample;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Graphics.Textures;
using osu.Framework.IO.Stores;

namespace osu.Game.Skinning
{
    public class LegacySkin : Skin
    {
        private readonly TextureStore textures;

        private readonly SampleManager samples;

        public LegacySkin(SkinInfo skin, IResourceStore<byte[]> storage, AudioManager audioManager)
            : base(skin)
        {
            storage = new LegacySkinResourceStore(skin, storage);
            samples = audioManager.GetSampleManager(storage);
            textures = new TextureStore(new RawTextureLoaderStore(storage));
        }

        public override Drawable GetDrawableComponent(string componentName)
        {
            var texture = textures.Get(componentName);
            if (texture == null) return null;

            return new Sprite
            {
                RelativeSizeAxes = Axes.Both,
                FillMode = FillMode.Fit,
                Texture = texture,
            };
        }

        public override SampleChannel GetSample(string sampleName) => samples.Get(sampleName);

        private class LegacySkinResourceStore : IResourceStore<byte[]>
        {
            private readonly SkinInfo skin;
            private readonly IResourceStore<byte[]> underlyingStore;

            private string getPathForFile(string filename) =>
                skin.Files.FirstOrDefault(f => string.Equals(Path.GetFileNameWithoutExtension(f.Filename), filename.Split('/').Last(), StringComparison.InvariantCultureIgnoreCase))?.FileInfo.StoragePath;

            public LegacySkinResourceStore(SkinInfo skin, IResourceStore<byte[]> underlyingStore)
            {
                this.skin = skin;
                this.underlyingStore = underlyingStore;
            }

            public Stream GetStream(string name) => underlyingStore.GetStream(getPathForFile(name));

            byte[] IResourceStore<byte[]>.Get(string name) => underlyingStore.Get(getPathForFile(name));
        }
    }
}