/// <summary> Creates a new instance of the drawer or returns a reusable instance from the pool. </summary>
/// <param name="value"> The initial cached value of the drawer. </param>
/// <param name="memberInfo"> LinkedMemberInfo for the class member that the created drawer represents. Can be null. </param>
/// <param name="parent"> The parent drawer of the created drawer. Can be null. </param>
/// <param name="label"> The prefix label. </param>
/// <param name="readOnly"> True if drawer should be read only. </param>
/// <returns> The drawer instance, ready to be used. </returns>
public static ConstraintedTypeDrawer Create([CanBeNull] Type value, [NotNull] Type[] baseTypeConstraints, TypeConstraint typeCategoryConstraint, LinkedMemberInfo memberInfo, IParentDrawer parent, GUIContent label, bool readOnly)
{
ConstraintedTypeDrawer result;
if (!DrawerPool.TryGet(out result))
{
result = new ConstraintedTypeDrawer();
}
result.Setup(value, baseTypeConstraints, typeCategoryConstraint, memberInfo, parent, label, readOnly);
result.LateSetup();
return(result);
}
/// <inheritdoc />
protected override void DoBuildMembers()
{
int count = memberBuildList.Count;
var genericTypeArguments = Value;
#if DEV_MODE && PI_ASSERTATIONS
Debug.Assert(count == genericTypeArguments.Length, "memberBuildList.Count=" + memberBuildList.Count + " != " + genericTypeArguments.Length);
#endif
#if DEV_MODE
Debug.Log("GenericTypeArgumentDrawer.DoBuildMembers called with types.Length=" + genericTypeArguments.Length + ", memberBuildList.Count=" + memberBuildList.Count + ", drawInSingleRow=" + drawInSingleRow);
#endif
DrawerArrayPool.Resize(ref members, count);
for (int n = count - 1; n >= 0; n--)
{
var argumentMemberInfo = memberBuildList[0];
var type = argumentMemberInfo.Type;
var baseTypeConstraints = type.GetGenericParameterConstraints();
TypeConstraint typeCategoryConstraint;
var specialConstraintMask = type.GenericParameterAttributes & GenericParameterAttributes.SpecialConstraintMask;
if ((specialConstraintMask & GenericParameterAttributes.ReferenceTypeConstraint) != 0)
{
typeCategoryConstraint = TypeConstraint.Class;
}
else if ((specialConstraintMask & GenericParameterAttributes.NotNullableValueTypeConstraint) != 0)
{
typeCategoryConstraint = TypeConstraint.Struct;
}
else
{
typeCategoryConstraint = TypeConstraint.None;
}
if (baseTypeConstraints.Length > 0)
{
members[n] = ConstraintedTypeDrawer.Create(type, baseTypeConstraints, typeCategoryConstraint, argumentMemberInfo, this, GUIContent.none, ReadOnly);
}
else
{
members[n] = TypeDrawer.Create(type, argumentMemberInfo, this, GUIContent.none, ReadOnly);
}
}
}