/// <summary>Called to get a this properties value from the given style.
/// This exists as it may be an alias property.</summary>
/// <param name="hostValue">This can return aliased values. The 'host' value is the actual property.
/// Think the value of 'margin' (host) when calling GetValue on 'margin-left' (returned).</param>
public virtual Css.Value GetOrCreateValue(Node context, Style styleBlock, bool allowInherit, out Css.Value hostValue)
{
// Pull the value from the block:
Css.Value result;
styleBlock.Properties.TryGetValue(this, out result);
if (result == null)
{
// Does it inherit?
if (Inherits)
{
// Create the keyword:
Css.Keywords.Inherit inherit = new Css.Keywords.Inherit(context, this);
if (allowInherit)
{
// Yep - inherit is our result:
result = inherit;
}
else
{
// Clone it instead (using special inherit copy):
result = inherit.SetCopy();
}
}
else
{
// Apply the initial value (must copy because it's likely to be changed):
result = InitialValue.Copy();
}
// Add it:
OnReadValue(styleBlock, result);
}
// Host is the same as result:
hostValue = result;
return(result);
}