/// <summary>
/// Determines if the given value represents a valid state of this property.
/// </summary>
/// <param name="value">The state that should be used.</param>
/// <returns>True if the state is valid, otherwise false.</returns>
protected override Boolean IsValid(CSSValue value)
{
var num = value.ToNumber();
if (num.HasValue)
_value = num.Value;
else if (value != CSSValue.Inherit)
return false;
return true;
}
protected override Boolean IsValid(CSSValue value)
{
CSSCalcValue calc = value.AsCalc();
if (calc != null)
{
_mode = new CalcLineHeightMode(calc);
}
else if (value.Is("normal"))
{
_mode = _normal;
}
else if (value.ToNumber().HasValue)
{
_mode = new MultipleLineHeightMode(value.ToNumber().Value);
}
else if (value != CSSValue.Inherit)
{
return(false);
}
return(true);
}
protected override Boolean IsValid(CSSValue value)
{
var num = value.ToNumber();
if (num.HasValue)
{
_value = num.Value;
}
else if (value != CSSValue.Inherit)
{
return(false);
}
return(true);
}
static ImageWidthMode ToMode(CSSValue value)
{
if (value.Is("auto"))
return _auto;
var multiple = value.ToNumber();
if (multiple.HasValue)
return new MultipleImageWidthMode(multiple.Value);
var calc = value.AsCalc();
if (calc != null)
return new CalcImageWidthMode(calc);
return null;
}
static SliceMode ToMode(CSSValue value)
{
var percent = value.ToPercent();
if (percent.HasValue)
{
return(new PercentSliceMode(percent.Value));
}
var number = value.ToNumber();
if (number.HasValue)
{
return(new PixelSliceMode(number.Value));
}
return(null);
}
Animation?ParseValue(CSSValue value)
{
var delay = Time.Zero;
var duration = Time.Zero;
var function = value.ToTimingFunction();
var name = "none";
var iterationCount = 1f;
if (function == null)
{
function = CSSTimingValue.Ease;
if (value is CSSIdentifierValue)
{
name = ((CSSIdentifierValue)value).Value;
}
else if (value is CSSPrimitiveValue <Time> )
{
duration = value.ToTime().Value;
}
else if (value is CSSPrimitiveValue <Number> )
{
iterationCount = value.ToNumber().Value;
}
else
{
return(null);
}
}
return(new Animation
{
Delay = delay,
Duration = duration,
Timing = function,
Name = name,
IterationCount = iterationCount,
FillMode = AnimationFillMode.None,
Direction = AnimationDirection.Normal
});
}
static ImageWidthMode ToMode(CSSValue value)
{
if (value.Is("auto"))
{
return(_auto);
}
var multiple = value.ToNumber();
if (multiple.HasValue)
{
return(new MultipleImageWidthMode(multiple.Value));
}
var calc = value.AsCalc();
if (calc != null)
{
return(new CalcImageWidthMode(calc));
}
return(null);
}