public void ParseColorStopWithoutValue()
{
var stop = ColorStop.Parse("#00a, #fff, #000");
Assert.Equal(Rgba32.Parse("#00a"), stop.Color);
Assert.Null(stop.Position);
}
public void ParseColorStop()
{
var stop = ColorStop.Parse("#00a 90%");
Assert.Equal(Rgba32.Parse("#00a"), stop.Color);
Assert.Equal(0.9, stop.Position);
}
public static CssValue Rgba(CssValue[] args)
{
if (args.Length == 4)
{
return(new CssFunction("rgba", new CssValueList(args)));
}
var color = Rgba32.Parse(args[0].ToString());
return(CssColor.FromRgba(color.R, color.G, color.B, float.Parse(args[1].ToString())));
}
public void ParseColorStopList()
{
var text = "#00a 90%, #000 91%, #fff 92%".AsSpan();
int read;
var stop1 = ColorStop.Read(text, out read);
Assert.Equal(8, read);
var stop2 = ColorStop.Read(text.Slice(read + 2), out read);
Assert.Equal(8, read);
Assert.Equal(Rgba32.Parse("#00a"), (Rgba32)stop1.Color);
Assert.Equal(0.9, stop1.Position);
Assert.Equal(Rgba32.Parse("#000"), (Rgba32)stop2.Color);
}
public static Rgba32 ReadColor(this ReadOnlySpan <char> text, out int read)
{
read = 0;
char current;
bool isFunction = false;
while (read < text.Length)
{
current = text[read];
// if we detect a function, read until )
// otherwise, read until end or space
if (isFunction)
{
if (current == ')')
{
read++;
break;
}
}
else if (current == '(')
{
isFunction = true;
}
else if (current == ' ' || current == ',')
{
break;
}
read++;
}
return(Rgba32.Parse(text.Slice(0, read)));
}
private static Rgba32 GetColor(CssValue value) => Rgba32.Parse(value.ToString());