static Optional <Color> TryParseColorHex111(string hex)
{
return
(ScalarParser.ParseHex(hex.Substring(0, 1)).SelectMany(r =>
ScalarParser.ParseHex(hex.Substring(1, 1)).SelectMany(g =>
ScalarParser.ParseHex(hex.Substring(2, 1)).Select(b => new Color(r, g, b, 1)))));
}
static Optional <Color> TryParseColorHex2222(string hex)
{
return
(ScalarParser.ParseHex(hex.Substring(0, 2)).SelectMany(r =>
ScalarParser.ParseHex(hex.Substring(2, 2)).SelectMany(g =>
ScalarParser.ParseHex(hex.Substring(4, 2)).SelectMany(b =>
ScalarParser.ParseHex(hex.Substring(6, 2)).Select(a => new Color(r, g, b, a))))));
}
// Percentages
public static Parsed <Percentages> TryParsePercentages(this string str)
{
if (!str.EndsWith("%"))
{
return(ScalarParser.TryParseDouble(str).Select(d => new Percentages(d)));
}
double value;
if (double.TryParse(str.StripSuffix("%"), out value))
{
return(Parsed.Success(new Percentages(value), str));
}
return(Parsed.Failure <Percentages>(str));
}
public static Parsed <Color> TryParseColor(string str)
{
if (str.StartsWith("#"))
{
return new Parsed <Color>
{
String = str,
Value = TryParseColorHex(str.AfterFirst("#")),
}
}
;
var vector = str.Split(",").Select(v => v.Trim()).ToArray();
switch (vector.Length)
{
case 3:
return(new Parsed <Color>
{
String = str,
Value =
ScalarParser.TryParseFloat(vector[0]).Value.SelectMany(r =>
ScalarParser.TryParseFloat(vector[1]).Value.SelectMany(g =>
ScalarParser.TryParseFloat(vector[2]).Value.Select(b =>
new Color(r, g, b, 1))))
});
case 4:
return(new Parsed <Color>
{
String = str,
Value =
ScalarParser.TryParseFloat(vector[0]).Value.SelectMany(r =>
ScalarParser.TryParseFloat(vector[1]).Value.SelectMany(g =>
ScalarParser.TryParseFloat(vector[2]).Value.SelectMany(b =>
ScalarParser.TryParseFloat(vector[3]).Value.Select(a =>
new Color(r, g, b, a)))))
});
}
return(Parsed.Failure <Color>(str));
}