using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;
using System.Windows;

namespace RazorEngineTest
{
    public static class ExHelper
    {
        public static T? FindVisualChild<T>(this DependencyObject parent, string name = "") where T : DependencyObject
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
            {
                var child = VisualTreeHelper.GetChild(parent, i);
                if (child is T result)
                {
                    if (string.IsNullOrEmpty(name)) return result;
                    else if (result is FrameworkElement element && element.Name == name) return result;
                }
                var descendant = child.FindVisualChild<T>(name);
                if (descendant != null) return descendant;
            }
            return null;
        }
    }
}