Resolution
Represents a resolution value.
using AngleSharp.Extensions;
using System;
namespace AngleSharp.Css.Values
{
public struct Resolution : IEquatable<Resolution>, IComparable<Resolution>, IFormattable
{
public enum Unit
{
None,
Dpi,
Dpcm,
Dppx
}
private readonly float _value;
private readonly Unit _unit;
public float Value => _value;
public Unit Type => _unit;
public string UnitString {
get {
switch (_unit) {
case Unit.Dpcm:
return UnitNames.Dpcm;
case Unit.Dpi:
return UnitNames.Dpi;
case Unit.Dppx:
return UnitNames.Dppx;
default:
return string.Empty;
}
}
}
public Resolution(float value, Unit unit)
{
_value = value;
_unit = unit;
}
public static bool TryParse(string s, out Resolution result)
{
float result2 = 0;
Unit unit = GetUnit(s.CssUnit(out result2));
if (unit != 0) {
result = new Resolution(result2, unit);
return true;
}
result = default(Resolution);
return false;
}
public static Unit GetUnit(string s)
{
if (s == "dpcm")
return Unit.Dpcm;
if (s == "dpi")
return Unit.Dpi;
if (s == "dppx")
return Unit.Dppx;
return Unit.None;
}
public float ToDotsPerPixel()
{
if (_unit == Unit.Dpi)
return _value / 96;
if (_unit == Unit.Dpcm)
return _value * 127 / 4800;
return _value;
}
public float To(Unit unit)
{
float num = ToDotsPerPixel();
switch (unit) {
case Unit.Dpi:
return num * 96;
case Unit.Dpcm:
return num * 50 * 96 / 127;
default:
return num;
}
}
public bool Equals(Resolution other)
{
if (_value == other._value)
return _unit == other._unit;
return false;
}
public int CompareTo(Resolution other)
{
return ToDotsPerPixel().CompareTo(other.ToDotsPerPixel());
}
public override bool Equals(object obj)
{
Resolution? nullable = obj as Resolution?;
if (nullable.HasValue)
return Equals(nullable.Value);
return false;
}
public override int GetHashCode()
{
return _value.GetHashCode();
}
public override string ToString()
{
return _value.ToString() + UnitString;
}
public string ToString(string format, IFormatProvider formatProvider)
{
return _value.ToString(format, formatProvider) + UnitString;
}
}
}