SafeAreaEffect.shared.cs

using System.Linq;
using Xamarin.CommunityToolkit.Helpers;
using Xamarin.Forms;

namespace Xamarin.CommunityToolkit.Effects
{
	public static class SafeAreaEffect
	{
		public static readonly BindableProperty SafeAreaProperty =
			BindableProperty.CreateAttached("SafeArea", typeof(SafeArea), typeof(SafeAreaEffect), default(SafeArea),
				propertyChanged: OnSafeAreaChanged);

		public static SafeArea GetSafeArea(BindableObject view)
			=> (SafeArea)view.GetValue(SafeAreaProperty);

		public static void SetSafeArea(BindableObject view, SafeArea value)
			=> view.SetValue(SafeAreaProperty, value);

		static void OnSafeAreaChanged(BindableObject bindable, object oldValue, object newValue)
		{
			if (!(bindable is View view))
				return;

			var oldEffect = view.Effects.FirstOrDefault(e => e is SafeAreaEffectRouter);

			if (oldEffect != null)
				view.Effects.Remove(oldEffect);

			if (((SafeArea)newValue).IsEmpty)
				return;

			view.Effects.Add(new SafeAreaEffectRouter());
		}
	}
}