/// <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)
{
if (value.Is(Keywords.None))
{
_properties.Clear();
}
else if (value is CSSPrimitiveValue)
{
var property = value.ToAnimatableIdentifier();
if (property == null)
{
return(false);
}
_properties.Clear();
_properties.Add(property);
}
else if (value is CSSValueList)
{
var properties = value.AsList(ValueExtensions.ToAnimatableIdentifier);
if (properties == null)
{
return(false);
}
_properties.Clear();
_properties.AddRange(properties);
}
else
{
return(false);
}
return(true);
}