using System;

namespace CPF.ReoGrid.Views
{
	internal struct GridRegion
	{
		public GridRegion(int startRow, int startCol, int endRow, int endCol)
		{
			this.startRow = startRow;
			this.startCol = startCol;
			this.endRow = endRow;
			this.endCol = endCol;
		}

		public bool Contains(CellPosition pos)
		{
			return this.Contains(pos.Row, pos.Col);
		}

		public bool Contains(int row, int col)
		{
			return this.startRow <= row && this.endRow >= row && this.startCol <= col && this.endCol >= col;
		}

		public bool Contains(RangePosition range)
		{
			return range.Row >= this.startRow && range.Col >= this.startCol && range.EndRow <= this.endRow && range.EndCol <= this.endCol;
		}

		public bool Intersect(RangePosition range)
		{
			return (range.Row < this.startRow && range.EndRow > this.startRow) || (range.Row < this.endRow && range.EndRow > this.endRow) || (range.Col < this.startCol && range.EndCol > this.startCol) || (range.Col < this.endCol && range.EndCol > this.endCol);
		}

		public bool IsOverlay(RangePosition range)
		{
			return this.Contains(range) || this.Intersect(range);
		}

		public override bool Equals(object obj)
		{
			bool flag = !(obj is GridRegion?);
			bool result;
			if (flag)
			{
				result = false;
			}
			else
			{
				GridRegion gridRegion = (GridRegion)obj;
				result = (this.startRow == gridRegion.startRow && this.startCol == gridRegion.startCol && this.endRow == gridRegion.endRow && this.endCol == gridRegion.endCol);
			}
			return result;
		}

		public override int GetHashCode()
		{
			return this.startRow ^ this.startCol ^ this.endRow ^ this.endCol;
		}

		public static bool operator ==(GridRegion gr1, GridRegion gr2)
		{
			return gr1.Equals(gr2);
		}

		public static bool operator !=(GridRegion gr1, GridRegion gr2)
		{
			return !gr1.Equals(gr2);
		}

		public bool IsEmpty
		{
			get
			{
				return this.Equals(GridRegion.Empty);
			}
		}

		public int Rows
		{
			get
			{
				return this.endRow - this.startRow + 1;
			}
			set
			{
				this.endRow = this.startRow + value - 1;
			}
		}

		public int Cols
		{
			get
			{
				return this.endCol - this.startCol + 1;
			}
			set
			{
				this.endCol = this.startCol + value - 1;
			}
		}

		public override string ToString()
		{
			return string.Format("VisibleRegion[{0},{1}-{2},{3}]", new object[]
			{
				this.startRow,
				this.startCol,
				this.endRow,
				this.endCol
			});
		}

		public RangePosition ToRange()
		{
			return new RangePosition(this.startRow, this.startCol, this.endRow - this.startRow + 1, this.endCol - this.startCol + 1);
		}

		internal int startRow;

		internal int endRow;

		internal int startCol;

		internal int endCol;

		internal static readonly GridRegion Empty = new GridRegion
		{
			startRow = 0,
			startCol = 0,
			endRow = 0,
			endCol = 0
		};
	}
}