using AngleSharp.Css; using AngleSharp.Extensions; namespace AngleSharp.Dom.Css { internal sealed class CssPerspectiveProperty : CssProperty, ICssPerspectiveProperty, ICssProperty { internal static readonly Length Default = Length.Zero; internal static readonly IValueConverter<Length> Converter = Converters.LengthConverter.Or(Keywords.None, Default); private Length _distance; public Length Distance => _distance; internal CssPerspectiveProperty(CssStyleDeclaration rule) : base(PropertyNames.Perspective, rule, PropertyFlags.Animatable) { Reset(); } public void SetDistance(Length distance) { _distance = distance; } internal override void Reset() { _distance = Default; } protected override bool IsValid(ICssValue value) { return Converter.TryConvert(value, SetDistance); } } }