using System;
using System.Collections.Generic;

namespace CPF.ReoGrid
{
	internal class CellComparerAdapter : IComparer<object>
	{
		public CellComparerAdapter(Func<object, object, int> comparerFunc, SortOrder order)
		{
			if (comparerFunc == null)
			{
				throw new ArgumentNullException("comparerFunc");
			}
			this.comparerFunc = comparerFunc;
			this.sign = ((order == SortOrder.Ascending) ? 1 : -1);
		}

		public int Compare(object x, object y)
		{
			string text = x as string;
			bool flag = text != null && string.IsNullOrEmpty(text);
			if (flag)
			{
				x = null;
			}
			string text2 = y as string;
			bool flag2 = text2 != null && string.IsNullOrEmpty(text2);
			if (flag2)
			{
				y = null;
			}
			bool flag3 = x == null && y == null;
			int result;
			if (flag3)
			{
				result = 0;
			}
			else
			{
				bool flag4 = x != null && y == null;
				if (flag4)
				{
					result = -this.sign;
				}
				else
				{
					bool flag5 = x == null;
					if (flag5)
					{
						result = this.sign;
					}
					else
					{
						result = this.comparerFunc(x, y);
					}
				}
			}
			return result;
		}

		private readonly Func<object, object, int> comparerFunc;

		private readonly int sign;
	}
}