public void Enqueue(object key, ProjectId projectId, DocumentId documentId, IEnumerable <ITaskItem> items)
{
lock (_gate)
{
var newItems = CreateVisualStudioTaskItems(items);
var existingItems = GetExistingVisualStudioTaskItems(key);
var hasNewItems = newItems != null;
var hasExistingItems = existingItems != null || HasPendingVisualStudioTaskItems(key, projectId, documentId);
// track items from opened files
if (documentId != null && _workspace.IsDocumentOpen(documentId))
{
_openedFiles.Add(documentId);
}
// nothing to do
if (!hasNewItems && !hasExistingItems)
{
return;
}
// handle 3 operations.
// 1. delete
if (!hasNewItems && hasExistingItems)
{
RemoveExistingTaskItems_NoLock(key, projectId, documentId, existingItems);
ReportPendingTaskItems_NoLock();
return;
}
// 2. insert
if (hasNewItems && !hasExistingItems)
{
EnqueuePendingTaskItems_NoLock(key, projectId, documentId, newItems);
ReportPendingTaskItems_NoLock();
return;
}
// 3. update
Contract.Requires(hasNewItems && hasExistingItems);
EnqueueUpdate_NoLock(key, projectId, documentId, newItems, existingItems);
}
}
