public void AddStruct(AbstractStruct str)
{
if (!Clients.TryGetValue(str.Id.Client, out var structs))
{
structs = new List <AbstractStruct>();
Clients[str.Id.Client] = structs;
}
else
{
var lastStruct = structs[structs.Count - 1];
if (lastStruct.Id.Clock + lastStruct.Length != str.Id.Clock)
{
throw new Exception("Unexpected");
}
}
structs.Add(str);
}
public (AbstractStruct item, int diff) FollowRedone(ID id)
{
ID? nextId = id;
int diff = 0;
AbstractStruct item;
do
{
if (diff > 0)
{
nextId = new ID(nextId.Value.Client, nextId.Value.Clock + diff);
}
item = Find(nextId.Value);
diff = nextId.Value.Clock - item.Id.Clock;
nextId = (item as Item)?.Redone;
} while (nextId != null && item is Item);
return(item, diff);
}
internal abstract bool MergeWith(AbstractStruct right);
internal bool Adds(AbstractStruct str)
{
return(!Transaction.BeforeState.TryGetValue(str.Id.Client, out int clock) || str.Id.Clock >= clock);
}
/// <summary>
/// Check if a struct is added by this event.
/// </summary>
internal bool Deletes(AbstractStruct str)
{
return(Transaction.DeleteSet.IsDeleted(str.Id));
}
internal override bool MergeWith(AbstractStruct right)
{
Debug.Assert(right is GC);
Length += right.Length;
return(true);
}