AnimationContext.cs

using System;
using Microsoft.Maui;
using Microsoft.Maui.Devices;
 
namespace NeuroAccessMaui.Animations
{
    public interface IAnimationContext
    {
        string Platform { get; }
 
        string? Theme { get; }
 
        Thickness SafeAreaInsets { get; }
 
        double KeyboardInset { get; }
 
        double ViewportWidth { get; }
 
        double ViewportHeight { get; }
 
        bool ReduceMotion { get; }
 
        double DurationScale { get; }
    }
 
    public sealed class AnimationContextOptions
    {
        public static AnimationContextOptions Default { get; } = new AnimationContextOptions();
 
        public string? Platform { get; init; }
 
        public string? Theme { get; init; }
 
        public Thickness? SafeAreaInsets { get; init; }
 
        public double? KeyboardInset { get; init; }
 
        public double? ViewportWidth { get; init; }
 
        public double? ViewportHeight { get; init; }
    }
 
    public sealed class AnimationContext : IAnimationContext
    {
        public AnimationContext(string Platform, string? Theme, Thickness SafeAreaInsets, double KeyboardInset, double ViewportWidth, double ViewportHeight, bool ReduceMotion, double DurationScale)
        {
            if (string.IsNullOrWhiteSpace(Platform))
                throw new ArgumentException("Platform cannot be null or whitespace.", nameof(Platform));
 
            this.Platform = Platform;
            this.Theme = Theme;
            this.SafeAreaInsets = SafeAreaInsets;
            this.KeyboardInset = KeyboardInset;
            this.ViewportWidth = ViewportWidth;
            this.ViewportHeight = ViewportHeight;
            this.ReduceMotion = ReduceMotion;
            this.DurationScale = DurationScale;
        }
 
        public string Platform { get; }
 
        public string? Theme { get; }
 
        public Thickness SafeAreaInsets { get; }
 
        public double KeyboardInset { get; }
 
        public double ViewportWidth { get; }
 
        public double ViewportHeight { get; }
 
        public bool ReduceMotion { get; }
 
        public double DurationScale { get; }
    }
 
    public interface IAnimationContextProvider
    {
        IAnimationContext CreateContext(AnimationContextOptions? Options);
    }
 
    public sealed class AnimationContextProvider : IAnimationContextProvider
    {
        private readonly IMotionSettings motionSettings;
 
        public AnimationContextProvider(IMotionSettings MotionSettings)
        {
            this.motionSettings = MotionSettings ?? throw new ArgumentNullException(nameof(MotionSettings));
        }
 
        public IAnimationContext CreateContext(AnimationContextOptions? Options)
        {
            AnimationContextOptions EffectiveOptions = Options ?? AnimationContextOptions.Default;
            string Platform = EffectiveOptions.Platform ?? DeviceInfo.Platform.ToString();
            string? Theme = EffectiveOptions.Theme;
            Thickness SafeArea = EffectiveOptions.SafeAreaInsets ?? Thickness.Zero;
            double KeyboardInset = EffectiveOptions.KeyboardInset ?? 0;
            double ViewportWidth = EffectiveOptions.ViewportWidth ?? 0;
            double ViewportHeight = EffectiveOptions.ViewportHeight ?? 0;
            bool ReduceMotion = this.motionSettings.ReduceMotion;
            double DurationScale = this.motionSettings.DurationScale;
            return new AnimationContext(Platform, Theme, SafeArea, KeyboardInset, ViewportWidth, ViewportHeight, ReduceMotion, DurationScale);
        }
    }
}