// caller may be null when not called as a worksheet function.
public AsyncObservableState(Guid id, AsyncCallInfo callInfo, ExcelReference caller, IExcelObservable observable)
{
_id = id.ToString();
_callInfo = callInfo;
_observable = observable;
_callerState = AsyncCallerState.GetCallerState(caller); // caller might be null, _callerState should not be
}
// caller may be null when not called as a worksheet function.
public AsyncObservableState(Guid id, AsyncCallInfo callInfo, ExcelReference caller, ExcelObservableOptions options, IExcelObservable observable)
{
_callInfo = callInfo;
if (options == ExcelObservableOptions.None)
{
_topics = new string[] { id.ToString() }
}
;
else
{
_topics = new string[] { id.ToString(), ((int)options).ToString() }
};
_observable = observable;
_callerState = AsyncCallerState.GetCallerState(caller); // caller might be null, _callerState should not be
}
// caller might be null
public static AsyncCallerState GetCallerState(ExcelReference caller)
{
if (caller == null)
{
return(new AsyncCallerState(null));
}
AsyncCallerState callerState;
if (!_callerStates.TryGetValue(caller, out callerState))
{
callerState = new AsyncCallerState(caller);
_callerStates[caller] = callerState;
}
return(callerState);
}