public virtual Result <bool> MoveAuto(int fromIndex, ICollection toCol, int moveAmount, CollectionContext context = null)
{
if (isReadOnly)
{
return(new Result <bool>(false, Errors.CollectionIsReadOnly));
}
if (moveAmount > GetAmount(fromIndex))
{
return(new Result <bool>(false, Errors.CollectionDoesNotContainItem));
}
if (this == toCol)
{
// Moving to a new auto. slot inside the same collection
return(true);
}
context = context ?? new CollectionContext();
var canAdd = toCol.CanAddBoxed(this[fromIndex], moveAmount, context);
if (canAdd.result == false)
{
return(canAdd);
}
var canSet = CanSet(fromIndex, this[fromIndex], GetAmount(fromIndex) - moveAmount);
if (canSet.result == false)
{
return(canSet);
}
var moveItem = this[fromIndex];
if (moveAmount < GetAmount(fromIndex))
{
// Not moving entire stack, clone object.
moveItem = CreateElementClone(this[fromIndex]);
}
toCol.AddBoxed(moveItem, moveAmount);
Set(fromIndex, this[fromIndex], GetAmount(fromIndex) - moveAmount, context);
return(true);
}