Avalonia/Perspex/Styling/Styler.cs

// -----------------------------------------------------------------------
// <copyright file="Styler.cs" company="Steven Kirk">
// Copyright 2014 MIT Licence. See licence.md for more information.
// </copyright>
// -----------------------------------------------------------------------

namespace Perspex.Styling
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;

    public class Styler : IStyler
    {
        public void ApplyStyles(IStyleable control)
        {
            IVisual visual = control as IVisual;
            IStyled styleContainer = visual.GetVisualAncestorOrSelf<IStyled>();

            if (Application.Current != null)
            {
                Application.Current.Styles.Attach(control);
            }

            this.ApplyStyles(control, styleContainer);
        }

        private void ApplyStyles(IStyleable control, IStyled container)
        {
            if (container != null)
            {
                IVisual visual = container as IVisual;

                if (visual != null)
                {
                    this.ApplyStyles(control, visual.GetVisualAncestor<IStyled>());
                }

                container.Styles.Attach(control);
            }
        }
    }
}