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

namespace FWindSoft.Wpf
{

    public class LocalName : DependencyObject
    {
        //子元素继承属性
        public static readonly DependencyProperty BaseNameProperty =
            DependencyProperty.RegisterAttached("BaseName", typeof(string),
                typeof(LocalName),
                new FrameworkPropertyMetadata(null,
                    FrameworkPropertyMetadataOptions.Inherits));

        public static string GetBaseName(FrameworkElement obj)
        {
            return (string) obj.GetValue(BaseNameProperty);
        }

        public static void SetBaseName(FrameworkElement obj, string value)
        {
            obj.SetValue(BaseNameProperty, value);
        }
    }


    public class LocalNameExtension : MarkupExtension
    {
        private string m_Qualifier;

        public LocalNameExtension()
        {
        }
        public LocalNameExtension(string qualifier)
        {
            m_Qualifier = qualifier;
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            var targetProvider = (IProvideValueTarget)
                serviceProvider.GetService(typeof(IProvideValueTarget));
            // MarkupExtension 在样式模板中，返回 this 以延迟提供值。
            //if (service.TargetObject.GetType().Name.EndsWith("SharedDp")) return this;
            // 如果不是 FrameworkElement，那么返回 this 以延迟提供值。
            FrameworkElement target = targetProvider.TargetObject as FrameworkElement;
            if (target==null) return this;
            //var target = (FrameworkElement)targetProvider.TargetObject;

            string name = LocalName.GetBaseName(target);
            if (m_Qualifier != null) { name += m_Qualifier; }
            return name;
        }
    }
}