public override string ToString()
{
var sb = StringBuilderCache.Aquire();
sb.Append("linear-gradient(");
if (Angle != null)
{
sb.Append(Angle.Value);
sb.Append("deg");
}
else if (Direction != default)
{
sb.Append("to ");
sb.Append(LinearGradientDirectionHelper.Canonicalize(Direction));
}
foreach (var stop in Stops)
{
sb.Append(", ");
sb.Append(stop.Color.ToString());
if (stop.Position is double position)
{
sb.Append(' ');
sb.Append(position.ToString("0.##%"));
}
}
sb.Append(')');
return(StringBuilderCache.ExtractAndRelease(sb));
}
public static LinearGradient Parse(ReadOnlySpan <char> text)
{
if (text.StartsWith("linear-gradient(".AsSpan()))
{
text = text.Slice(16, text.Length - 17);
}
if (text.Length == 0)
{
throw new ArgumentException("May not be empty", nameof(text));
}
double?angle = null;
LinearGradientDirection direction = default;
if (char.IsDigit(text[0]) || text[0] == '-')
{
angle = ReadAngle(text, out int read);
text = text.Slice(read);
}
else if (LinearGradientDirectionHelper.TryParse(text, out direction, out int read))
{
text = text.Slice(read);
}
var colorStops = new List <ColorStop>();
while (text.Length > 0)
{
if (text[0] == ',')
{
text = text.Slice(1);
}
if (text.TryReadWhitespace(out int read))
{
text = text.Slice(read);
}
if (text[0] == ',')
{
text = text.Slice(1);
}
var colorStop = ColorStop.Read(text, out read);
text = text.Slice(read);
colorStops.Add(colorStop);
}
// TODO: Set the default stops
// // [ <angle> | to [top | bottom] || [left | right] ],]? <color-stop>[, <color-stop>]+);
return(new LinearGradient(direction, angle, colorStops.ToArray()));
}
