protected override Node EditColor(Color color, Number number)
{
var value = number.Value;
if (number.Unit == "%")
value = (value * 255) / 100d;
return new Color(color.R, color.G, color.B + value);
}
protected override Node EditColor(Color color, Number number)
{
var alpha = number.Value;
if (number.Unit == "%")
alpha = alpha / 100d;
return new Color(color.R, color.G, color.B, color.Alpha + alpha);
}
protected override Node Eval(Number number, Node[] args)
{
if (number.Unit == "%")
return number;
if (string.IsNullOrEmpty(number.Unit))
return new Number(number.Value * 100, "%");
throw new ParsingException(string.Format("Expected unitless number in function 'percentage', found {0}", number.ToCSS(null)));
}
protected abstract Node EditHsl(HslColor color, Number number);
protected override Node EditColor(Color color, Number number)
{
var hsl = HslColor.FromRgbColor(color);
return EditHsl(hsl, number);
}
protected override Node EditHsl(HslColor color, Number number)
{
color.Saturation += number.Value / 100;
return color.ToRgbColor();
}
protected override Node EditHsl(HslColor color, Number number)
{
color.Lightness += number.Value / 100;
return color.ToRgbColor();
}
protected override Node EditHsl(HslColor color, Number number)
{
color.Hue += number.Value / 360d;
return color.ToRgbColor();
}
protected override Node EditHsl(HslColor color, Number number)
{
return null;
}
protected abstract Node Eval(Number number, Node[] args);
protected virtual Node EditColor(Color color, Number number)
{
return null;
}