internal static SvgAngle Parse(StringPtr ptr)
{
var begin = ptr.Index;
ptr.AdvanceNumber();
if (begin == ptr.Index)
{
throw new ArgumentException(nameof(ptr));
}
var value = float.Parse(ptr.Target.Substring(begin, ptr.Index - begin), System.Globalization.CultureInfo.InvariantCulture);
if (ptr.Index != ptr.Target.Length)
{
var unit = ptr.String;
if (unit.StartsWith("deg"))
{
ptr += 3;
return(new SvgAngle(SvgAngleType.Degree, value));
}
if (unit.StartsWith("rad"))
{
ptr += 3;
return(new SvgAngle(SvgAngleType.Radian, value));
}
if (unit.StartsWith("grad"))
{
ptr += 4;
return(new SvgAngle(SvgAngleType.Grade, value));
}
}
return(new SvgAngle(SvgAngleType.Degree, value));
}
private float?ParseNumber(StringPtr ptr)
{
var begin = ptr.Index;
ptr.AdvanceNumber();
if (begin == ptr.Index)
{
return(null);
}
var numberText = ptr.Target.Substring(begin, ptr.Index - begin);
return(float.Parse(numberText, System.Globalization.CultureInfo.InvariantCulture));
}
internal static bool TryParse(string numberText, float min, float max, out SvgNumber result)
{
var ptr = new StringPtr(numberText);
ptr.AdvanceNumber();
if (ptr.Index != numberText.Length)
{
result = 0.0F;
return(false);
}
result = Math.Min(Math.Max(float.Parse(numberText), min), max);
return(true);
}
internal static bool TryParse(string numberText, out SvgNumber result)
{
var ptr = new StringPtr(numberText);
ptr.AdvanceNumber();
if (ptr.Index != numberText.Length)
{
result = 0.0F;
return(false);
}
result = float.Parse(numberText, System.Globalization.CultureInfo.InvariantCulture);
return(true);
}
internal static bool TryParse(string lengthText, bool presentation, out SvgLength result)
{
var ptr = new StringPtr(lengthText);
ptr.AdvanceNumber();
var value = float.Parse(lengthText.Substring(0, ptr.Index), System.Globalization.CultureInfo.InvariantCulture);
if (ptr.Index != lengthText.Length)
{
var unit = lengthText.Substring(ptr.Index);
if (presentation)
{
unit = unit.ToLower();
}
switch (unit)
{
case "%": result = new SvgLength(SvgLengthType.Percentage, value); break;
case "em": result = new SvgLength(SvgLengthType.Ems, value); break;
case "ex": result = new SvgLength(SvgLengthType.Exs, value); break;
case "px": result = new SvgLength(SvgLengthType.Pixel, value); break;
case "cm": result = new SvgLength(SvgLengthType.Centimeter, value); break;
case "mm": result = new SvgLength(SvgLengthType.Millimeter, value); break;
case "in": result = new SvgLength(SvgLengthType.Inch, value); break;
case "pt": result = new SvgLength(SvgLengthType.Point, value); break;
case "pc": result = new SvgLength(SvgLengthType.Pica, value); break;
default: result = null; return(false);
}
return(true);
}
result = new SvgLength(SvgLengthType.Number, value);
return(true);
}
internal static SvgAngle ParseInCss(string angleText)
{
var ptr = new StringPtr(angleText);
ptr.AdvanceNumber();
var value = float.Parse(angleText.Substring(0, ptr.Index), System.Globalization.CultureInfo.InvariantCulture);
if (ptr.Index != angleText.Length)
{
var unit = angleText.Substring(ptr.Index).ToLower();
switch (unit)
{
case "deg": return(new SvgAngle(SvgAngleType.Degree, value));
case "rad": return(new SvgAngle(SvgAngleType.Radian, value));
case "grad": return(new SvgAngle(SvgAngleType.Grade, value));
}
throw new ArgumentException(nameof(angleText));
}
return(new SvgAngle(SvgAngleType.Degree, value));
}
