/// <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 length = value.ToLength();
if (length.HasValue)
{
_h = _v = length.Value;
}
else if (value is CSSValueList)
{
var values = (CSSValueList)value;
if (values.Length != 2)
{
return(false);
}
var h = values[0].ToLength();
var v = values[1].ToLength();
if (!h.HasValue || !v.HasValue)
{
return(false);
}
_h = h.Value;
_v = v.Value;
}
else
{
return(false);
}
return(true);
}
/// <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.Normal))
{
_spacing = null;
}
else if (value.ToLength().HasValue)
{
_spacing = value.ToLength();
}
else
{
return(false);
}
return(true);
}
/// <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 gap = value.ToLength();
if (gap.HasValue)
{
_gap = gap.Value;
}
else if (value.Is(Keywords.Normal))
{
_gap = _normal;
}
else
{
return(false);
}
return(true);
}
/// <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 width = value.ToLength();
if (width.HasValue)
{
_width = width.Value;
}
else if (value.Is(Keywords.Auto))
{
_width = null;
}
else
{
return(false);
}
return(true);
}
/// <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 distance = value.ToLength();
if (distance.HasValue)
{
_distance = distance.Value;
}
//Is a keyword indicating that no perspective transform has to be applied.
else if (value.Is(Keywords.None))
{
_distance = Length.Zero;
}
else
{
return(false);
}
return(true);
}