using AngleSharp.Css; using AngleSharp.Extensions; namespace AngleSharp.Dom.Css { internal sealed class CssWordSpacingProperty : CssProperty, ICssWordSpacingProperty, ICssProperty { internal static readonly Length? Default = null; internal static readonly IValueConverter<Length?> Converter = Converters.LengthConverter.ToNullable().Or(Keywords.Normal, Default); private Length? _spacing; public bool IsNormal => !_spacing.HasValue; public Length? Spacing => _spacing; internal CssWordSpacingProperty(CssStyleDeclaration rule) : base(PropertyNames.WordSpacing, rule, PropertyFlags.Inherited | PropertyFlags.Unitless | PropertyFlags.Animatable) { Reset(); } private void SetSpacing(Length? spacing) { _spacing = spacing; } internal override void Reset() { _spacing = Default; } protected override bool IsValid(ICssValue value) { return Converter.TryConvert(value, SetSpacing); } } }