internal static PaddedFormat GetOrCreate(string format, ref int pos)
{
_ = WhiteSpaceReader.TryRead(format, ref pos, out var prePadding);
if (DoubleFormatReader.TryRead(format, ref pos, out var valueFormat))
{
_ = WhiteSpaceReader.TryRead(format, ref pos, out var postPadding);
return(new PaddedFormat(prePadding, valueFormat, postPadding));
}
return(PaddedFormat.CreateUnknown(prePadding, format));
}
internal static bool TryParse(string?format, [MaybeNullWhen(false)] out QuantityFormat <TUnit> result)
{
if (string.IsNullOrWhiteSpace(format))
{
result = QuantityFormat <TUnit> .CreateUnknown("{nameof(format) is null}", Unit <TUnit> .Default);
return(false);
}
if (Cache.TryGetValue(format, out result))
{
return(true);
}
var pos = 0;
_ = WhiteSpaceReader.TryRead(format, ref pos);
var end = format.Length;
if (TryReadPrefix(format, ref pos))
{
end = format.LastIndexOf('}');
if (end < 0)
{
result = QuantityFormat <TUnit> .CreateUnknown(format, Unit <TUnit> .Default);
return(false);
}
if (!WhiteSpaceReader.IsRestWhiteSpace(format, end + 1))
{
result = QuantityFormat <TUnit> .CreateUnknown(format, Unit <TUnit> .Default);
return(false);
}
}
var trimmedFormat = pos != end
? format.Substring(pos, end - pos)
: format;
var success = CompositeFormatParser.TryParse(trimmedFormat, out result);
if (success)
{
Cache.Add(format, result);
}
return(success);
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
var text = value as string;
if (string.IsNullOrWhiteSpace(text))
{
return(null);
}
var settings = Settings.Instance;
var pos = 0;
_ = WhiteSpaceReader.TryRead(text, ref pos);
var indexOf = text.IndexOf("1/", pos, StringComparison.Ordinal);
if (indexOf >= 0)
{
pos = indexOf + 2;
}
if (SymbolAndPowerReader.TryRead(text, ref pos, out IReadOnlyList <SymbolAndPower> result))
{
if (WhiteSpaceReader.IsRestWhiteSpace(text, pos))
{
var unitAndPowers = result.Select(sap => UnitAndPower.Create(settings.AllUnits.Single(x => x.Symbol == sap.Symbol), sap.Power))
.ToList();
var unitParts = new UnitParts(unitAndPowers);
if (indexOf < 0)
{
return(unitParts);
}
return(unitParts.Inverse());
}
}
return(text);
}
/// <inheritdoc />
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if (!this.initialized)
{
this.Initialize();
}
var message = this.errorText.ToString();
if (!(targetType == typeof(VolumetricFlow) || targetType == typeof(VolumetricFlow?)))
{
message += $"{this.GetType().Name} does not support converting to {targetType.Name}";
}
if (message != string.Empty)
{
message = message.TrimEnd('\r', '\n');
if (Is.DesignMode)
{
throw new InvalidOperationException(message);
}
return(message);
}
if (value == null)
{
return(null);
}
if (value is double)
{
return(new VolumetricFlow((double)value, this.unit.Value));
}
var text = value as string;
if (string.IsNullOrEmpty(text))
{
return(null);
}
var unitInput = this.UnitInput ?? Wpf.UnitInput.ScalarOnly;
switch (unitInput)
{
case Wpf.UnitInput.ScalarOnly:
{
double d;
if (double.TryParse(text, NumberStyles.Float, culture, out d))
{
return(new VolumetricFlow(d, this.unit.Value));
}
VolumetricFlow result;
if (VolumetricFlow.TryParse(text, NumberStyles.Float, culture, out result))
{
return($"#{text}#"); // returning modified text so that TypeConverter fails and we get an error
}
return(text); // returning raw to trigger error
}
case Wpf.UnitInput.SymbolAllowed:
{
double d;
int pos = 0;
WhiteSpaceReader.TryRead(text, ref pos);
if (DoubleReader.TryRead(text, ref pos, NumberStyles.Float, culture, out d))
{
WhiteSpaceReader.TryRead(text, ref pos);
if (pos == text.Length)
{
return(new VolumetricFlow(d, this.unit.Value));
}
}
goto case Wpf.UnitInput.SymbolRequired;
}
case Wpf.UnitInput.SymbolRequired:
{
VolumetricFlow result;
if (VolumetricFlow.TryParse(text, NumberStyles.Float, culture, out result))
{
return(result);
}
return(text);
}
default:
throw new ArgumentOutOfRangeException();
}
}