namespace AntDesignWPF.Converters
{
    using System;
    using System.Globalization;
    using System.Windows;
    using System.Windows.Data;
    using System.Windows.Markup;

    [ValueConversion(typeof(Thickness), typeof(Thickness))]
    public class ThicknessReverseConverter : MarkupExtension, IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var thickness = (Thickness)value;

            thickness.Left *= -1;
            thickness.Top *= -1;

            thickness.Right *= -1;
            thickness.Bottom *= -1;

            return thickness;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return DependencyProperty.UnsetValue;
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }
    }
}