CompositeViewAnimation.cs

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Maui.Controls;
 
namespace NeuroAccessMaui.Animations
{
    public sealed class CompositeViewAnimation : IViewAnimation
    {
        private readonly IReadOnlyList<IViewAnimation> children;
        private readonly AnimationCompositionMode mode;
 
        public CompositeViewAnimation(AnimationCompositionMode Mode, IReadOnlyList<IViewAnimation> Children)
        {
            this.mode = Mode;
            this.children = Children ?? throw new ArgumentNullException(nameof(Children));
        }
 
        public async Task RunAsync(VisualElement Target, IAnimationContext Context, AnimationOptions? Options, CancellationToken Token)
        {
            ArgumentNullException.ThrowIfNull(Target);
            ArgumentNullException.ThrowIfNull(Context);
 
            if (this.children.Count == 0)
                return;
 
            if (this.mode == AnimationCompositionMode.Parallel)
            {
                List<Task> Tasks = new List<Task>(this.children.Count);
                foreach (IViewAnimation Child in this.children)
                {
                    Task Execution = Child.RunAsync(Target, Context, Options, Token);
                    Tasks.Add(Execution);
                }
                await Task.WhenAll(Tasks).ConfigureAwait(false);
            }
            else
            {
                foreach (IViewAnimation Child in this.children)
                {
                    await Child.RunAsync(Target, Context, Options, Token).ConfigureAwait(false);
                }
            }
        }
    }
}