Angle
Represents an angle value.
using AngleSharp.Extensions;
using System;
namespace AngleSharp.Css.Values
{
public struct Angle : IEquatable<Angle>, IComparable<Angle>, IFormattable
{
public enum Unit : ushort
{
None,
Deg,
Rad,
Grad,
Turn
}
public static readonly Angle Zero = default(Angle);
public static readonly Angle HalfQuarter = new Angle(45, Unit.Deg);
public static readonly Angle Quarter = new Angle(90, Unit.Deg);
public static readonly Angle TripleHalfQuarter = new Angle(135, Unit.Deg);
public static readonly Angle Half = new Angle(180, Unit.Deg);
private readonly float _value;
private readonly Unit _unit;
public float Value => _value;
public Unit Type => _unit;
public string UnitString {
get {
switch (_unit) {
case Unit.Deg:
return Units.Deg;
case Unit.Grad:
return Units.Grad;
case Unit.Turn:
return Units.Turn;
case Unit.Rad:
return Units.Rad;
default:
return string.Empty;
}
}
}
public Angle(float value, Unit unit)
{
_value = value;
_unit = unit;
}
public static explicit operator float(Angle angle)
{
return angle.ToRadian();
}
public static bool TryParse(string s, out Angle result)
{
float result2 = 0;
Unit unit = GetUnit(s.CssUnit(out result2));
if (unit != 0) {
result = new Angle(result2, unit);
return true;
}
result = default(Angle);
return false;
}
public static Unit GetUnit(string s)
{
switch (s) {
case "deg":
return Unit.Deg;
case "grad":
return Unit.Grad;
case "turn":
return Unit.Turn;
case "rad":
return Unit.Rad;
default:
return Unit.None;
}
}
public float ToRadian()
{
switch (_unit) {
case Unit.Deg:
return (float)(0.017453292519943295 * (double)_value);
case Unit.Grad:
return (float)(0.015707963267948967 * (double)_value);
case Unit.Turn:
return (float)(6.283185307179586 * (double)_value);
default:
return _value;
}
}
public float Tan()
{
return (float)Math.Tan((double)ToRadian());
}
public float Cos()
{
return (float)Math.Cos((double)ToRadian());
}
public float Sin()
{
return (float)Math.Sin((double)ToRadian());
}
public bool Equals(Angle other)
{
return ToRadian() == other.ToRadian();
}
public int CompareTo(Angle other)
{
return ToRadian().CompareTo(other.ToRadian());
}
public override bool Equals(object obj)
{
if (obj is Angle)
return Equals((Angle)obj);
return false;
}
public override int GetHashCode()
{
return (int)_value;
}
public override string ToString()
{
return _value.ToString() + UnitString;
}
public string ToString(string format, IFormatProvider formatProvider)
{
return _value.ToString(format, formatProvider) + UnitString;
}
}
}