using System.Windows;

using Microsoft.Research.DynamicDataDisplay.Common;

using System.Diagnostics;



namespace Microsoft.Research.DynamicDataDisplay

{

	public static class RectExtensions

	{

		public static Point GetCenter(this Rect rect)

		{

			return new Point(rect.Left + rect.Width * 0.5, rect.Top + rect.Height * 0.5);

		}



		public static Rect FromCenterSize(Point center, Size size)

		{

			return FromCenterSize(center, size.Width, size.Height);

		}



		public static Rect FromCenterSize(Point center, double width, double height)

		{

			Rect res = new Rect(center.X - width / 2, center.Y - height / 2, width, height);

			return res;

		}



		public static Rect Zoom(this Rect rect, Point to, double ratio)

		{

			return CoordinateUtilities.RectZoom(rect, to, ratio);

		}



		public static Rect ZoomOutFromCenter(this Rect rect, double ratio)

		{

			return CoordinateUtilities.RectZoom(rect, rect.GetCenter(), ratio);

		}



		public static Rect ZoomInToCenter(this Rect rect, double ratio)

		{

			return CoordinateUtilities.RectZoom(rect, rect.GetCenter(), 1 / ratio);

		}



		public static Int32Rect ToInt32Rect(this Rect rect)

		{

			Int32Rect intRect = new Int32Rect(

				(int)rect.X,

				(int)rect.Y,

				(int)rect.Width,

				(int)rect.Height);



			return intRect;

		}



		[DebuggerStepThrough]

		public static DataRect ToDataRect(this Rect rect)

		{

			return new DataRect(rect);

		}



		internal static bool IsNaN(this Rect rect)

		{

			return !rect.IsEmpty && (

				rect.X.IsNaN() ||

				rect.Y.IsNaN() ||

				rect.Width.IsNaN() ||

				rect.Height.IsNaN()

				);

		}

	}

}