internal static void CleanupTransactions(IList <Transaction> transactionCleanups, int i)
{
if (i < transactionCleanups.Count)
{
var transaction = transactionCleanups[i];
var doc = transaction.Doc;
var store = doc.Store;
var ds = transaction.DeleteSet;
var mergeStructs = transaction._mergeStructs;
var actions = new List <Action>();
try
{
ds.SortAndMergeDeleteSet();
transaction.AfterState = store.GetStateVector();
doc._transaction = null;
actions.Add(() =>
{
doc.InvokeOnBeforeObserverCalls(transaction);
});
actions.Add(() =>
{
foreach (var kvp in transaction.Changed)
{
var itemType = kvp.Key;
var subs = kvp.Value;
if (itemType._item == null || !itemType._item.Deleted)
{
itemType.CallObserver(transaction, subs);
}
}
});
actions.Add(() =>
{
// Deep observe events.
foreach (var kvp in transaction.ChangedParentTypes)
{
var type = kvp.Key;
var events = kvp.Value;
// We need to think about the possibility that the user transforms the YDoc in the event.
if (type._item == null || !type._item.Deleted)
{
foreach (var evt in events)
{
if (evt.Target._item == null || !evt.Target._item.Deleted)
{
evt.CurrentTarget = type;
}
}
// Sort events by path length so that top-level events are fired first.
var sortedEvents = events.ToList();
sortedEvents.Sort((a, b) => a.Path.Count - b.Path.Count);
Debug.Assert(sortedEvents.Count > 0);
actions.Add(() =>
{
type.CallDeepEventHandlerListeners(sortedEvents, transaction);
});
}
}
});
actions.Add(() =>
{
doc.InvokeOnAfterTransaction(transaction);
});
CallAll(actions);
}
finally
{
// Replace deleted items with ItemDeleted / GC.
// This is where content is actually removed from the Yjs Doc.
if (doc.Gc)
{
ds.TryGcDeleteSet(store, doc.GcFilter);
}
ds.TryMergeDeleteSet(store);
// On all affected store.clients props, try to merge.
foreach (var kvp in transaction.AfterState)
{
var client = kvp.Key;
var clock = kvp.Value;
if (!transaction.BeforeState.TryGetValue(client, out int beforeClock))
{
beforeClock = 0;
}
if (beforeClock != clock)
{
var structs = store.Clients[client];
var firstChangePos = Math.Max(StructStore.FindIndexSS(structs, beforeClock), 1);
for (int j = structs.Count - 1; j >= firstChangePos; j--)
{
DeleteSet.TryToMergeWithLeft(structs, j);
}
}
}
// Try to merge mergeStructs.
// TODO: It makes more sense to transform mergeStructs to a DS, sort it, and merge from right to left
// but at the moment DS does not handle duplicates.
for (int j = 0; j < mergeStructs.Count; j++)
{
var client = mergeStructs[j].Id.Client;
var clock = mergeStructs[j].Id.Clock;
var structs = store.Clients[client];
var replacedStructPos = StructStore.FindIndexSS(structs, clock);
if (replacedStructPos + 1 < structs.Count)
{
DeleteSet.TryToMergeWithLeft(structs, replacedStructPos + 1);
}
if (replacedStructPos > 0)
{
DeleteSet.TryToMergeWithLeft(structs, replacedStructPos);
}
}
if (!transaction.Local)
{
if (!transaction.AfterState.TryGetValue(doc.ClientId, out int afterClock))
{
afterClock = -1;
}
if (!transaction.BeforeState.TryGetValue(doc.ClientId, out int beforeClock))
{
beforeClock = -1;
}
if (afterClock != beforeClock)
{
doc.ClientId = YDoc.GenerateNewClientId();
// Debug.WriteLine($"{nameof(Transaction)}: Changed the client-id because another client seems to be using it.");
}
}
// @todo: Merge all the transactions into one and provide send the data as a single update message.
doc.InvokeOnAfterTransactionCleanup(transaction);
doc.InvokeUpdateV2(transaction);
foreach (var subDoc in transaction.SubdocsAdded)
{
doc.Subdocs.Add(subDoc);
}
foreach (var subDoc in transaction.SubdocsRemoved)
{
doc.Subdocs.Remove(subDoc);
}
doc.InvokeSubdocsChanged(transaction.SubdocsLoaded, transaction.SubdocsAdded, transaction.SubdocsRemoved);
foreach (var subDoc in transaction.SubdocsRemoved)
{
subDoc.Destroy();
}
if (transactionCleanups.Count <= i + 1)
{
doc._transactionCleanups.Clear();
doc.InvokeAfterAllTransactions(transactionCleanups);
}
else
{
CleanupTransactions(transactionCleanups, i + 1);
}
}
}
}