using System; using System.ComponentModel; using System.Diagnostics; using System.Globalization; namespace Xamarin.Forms { [DebuggerDisplay("Width={Width}, Height={Height}")] public struct Size { double _width; double _height; public static readonly Size Zero; public Size(double width, double height) { if (double.IsNaN(width)) throw new ArgumentException("NaN is not a valid value for width"); if (double.IsNaN(height)) throw new ArgumentException("NaN is not a valid value for height"); _width = width; _height = height; } public bool IsZero { get { return (_width == 0) && (_height == 0); } } [DefaultValue(0d)] public double Width { get { return _width; } set { if (double.IsNaN(value)) throw new ArgumentException("NaN is not a valid value for Width"); _width = value; } } [DefaultValue(0d)] public double Height { get { return _height; } set { if (double.IsNaN(value)) throw new ArgumentException("NaN is not a valid value for Height"); _height = value; } } public static Size operator +(Size s1, Size s2) { return new Size(s1._width + s2._width, s1._height + s2._height); } public static Size operator -(Size s1, Size s2) { return new Size(s1._width - s2._width, s1._height - s2._height); } public static Size operator *(Size s1, double value) { return new Size(s1._width * value, s1._height * value); } public static bool operator ==(Size s1, Size s2) { return (s1._width == s2._width) && (s1._height == s2._height); } public static bool operator !=(Size s1, Size s2) { return (s1._width != s2._width) || (s1._height != s2._height); } public static explicit operator Point(Size size) { return new Point(size.Width, size.Height); } public bool Equals(Size other) { return _width.Equals(other._width) && _height.Equals(other._height); } public override bool Equals(object obj) { if (ReferenceEquals(null, obj)) return false; return obj is Size && Equals((Size)obj); } public override int GetHashCode() { unchecked { return (_width.GetHashCode() * 397) ^ _height.GetHashCode(); } } public override string ToString() { return string.Format("{{Width={0} Height={1}}}", _width.ToString(CultureInfo.InvariantCulture), _height.ToString(CultureInfo.InvariantCulture)); } } }