AnimationDescriptor.cs

using System;
using System.Collections.Generic;
using Microsoft.Maui.Controls;
 
namespace NeuroAccessMaui.Animations
{
    public abstract class AnimationDescriptor
    {
        protected AnimationDescriptor(AnimationKey Key, TimeSpan Duration, Easing Easing, IReadOnlyDictionary<string, object>? Metadata)
        {
            if (Duration <= TimeSpan.Zero)
                throw new ArgumentOutOfRangeException(nameof(Duration), "Duration must be positive.");
            this.Key = Key;
            this.Duration = Duration;
            this.Easing = Easing ?? throw new ArgumentNullException(nameof(Easing));
            this.Metadata = Metadata ?? new Dictionary<string, object>();
        }
 
        public AnimationKey Key { get; }
 
        public TimeSpan Duration { get; }
 
        public Easing Easing { get; }
 
        public IReadOnlyDictionary<string, object> Metadata { get; }
    }
 
    public sealed class ViewAnimationDescriptor : AnimationDescriptor
    {
        private readonly Func<IAnimationContext, IViewAnimation> factory;
 
        public ViewAnimationDescriptor(AnimationKey Key, TimeSpan Duration, Easing Easing, Func<IAnimationContext, IViewAnimation> Factory, IReadOnlyDictionary<string, object>? Metadata = null)
            : base(Key, Duration, Easing, Metadata)
        {
            this.factory = Factory ?? throw new ArgumentNullException(nameof(Factory));
        }
 
        public IViewAnimation CreateExecutor(IAnimationContext Context)
        {
            ArgumentNullException.ThrowIfNull(Context);
            return this.factory(Context);
        }
    }
 
    public sealed class TransitionAnimationDescriptor : AnimationDescriptor
    {
        private readonly Func<IAnimationContext, ITransitionAnimation> factory;
 
        public TransitionAnimationDescriptor(AnimationKey Key, TimeSpan Duration, Easing Easing, Func<IAnimationContext, ITransitionAnimation> Factory, IReadOnlyDictionary<string, object>? Metadata = null)
            : base(Key, Duration, Easing, Metadata)
        {
            this.factory = Factory ?? throw new ArgumentNullException(nameof(Factory));
        }
 
        public ITransitionAnimation CreateExecutor(IAnimationContext Context)
        {
            ArgumentNullException.ThrowIfNull(Context);
            return this.factory(Context);
        }
    }
 
    public enum AnimationCompositionMode
    {
        Sequential,
 
        Parallel
    }
}