private void StopSearch(SearchCallbackShim callbackShim)
{
if (this.searchTask != null)
{
var localSearchTask = this.searchTask;
this.searchTask = null;
localSearchTask.Stop();
//callbackShim?.Cancel();
}
}
private Task StartSearch(string searchString, SearchCallbackShim callbackShim)
{
this.StopSearch(callbackShim: null);
this.searchTask = searchProvider.CreateSearch(
++cookie,
new SearchQueryShim(searchString),
callbackShim);
this.searchTask.Start();
return(callbackShim.Task);
}
public System.Threading.Tasks.Task GetItemsAsync(
string searchString,
IOmniBoxSearchSession session)
{
if (session.CancellationToken.IsCancellationRequested)
{
return(Task.FromCanceled(session.CancellationToken));
}
var callbackShim = new SearchCallbackShim(session);
session.CancellationToken.Register(() => this.StopSearch(callbackShim));
return(this.StartSearch(searchString, callbackShim));
}