protected bool OnPowerEvent(PowerEventType powerStatus)
{
Log.Debug("OnPowerEvent: PowerStatus: {0}", powerStatus);
bool accept = true;
List <PowerEventHandler> powerEventPreventers = new List <PowerEventHandler>();
List <PowerEventHandler> powerEventAllowers = new List <PowerEventHandler>();
// Make a copy of _powerEventHandlers, because the handler might call AddPowerEventHandler
// or RemovePowerEventHandler when executing thus generating an exception when we iterate.
List <PowerEventHandler> listCopy = new List <PowerEventHandler>();
foreach (PowerEventHandler handler in _powerEventHandlers)
{
listCopy.Add((PowerEventHandler)handler.Clone());
}
// Now iterate the 'copy'
foreach (PowerEventHandler handler in listCopy)
{
bool result = handler(powerStatus);
if (result == false)
{
accept = false;
powerEventPreventers.Add(handler);
}
else
{
powerEventAllowers.Add(handler);
}
}
if (accept)
{
return(true);
}
if (powerEventPreventers.Count > 0)
{
foreach (PowerEventHandler handler in powerEventPreventers)
{
Log.Debug("PowerStatus:{0} rejected by {1}", powerStatus, handler.Target.ToString());
}
}
// if query suspend:
// everybody that allowed the standby now must receive a deny event
// since we will not get a QuerySuspendFailed message by the OS when
// we return false to QuerySuspend
if (powerStatus == PowerEventType.QuerySuspend ||
powerStatus == PowerEventType.QueryStandBy)
{
foreach (PowerEventHandler handler in powerEventAllowers)
{
handler(powerStatus == PowerEventType.QuerySuspend
? PowerEventType.QuerySuspendFailed
: PowerEventType.QueryStandByFailed);
}
}
else if (powerStatus == PowerEventType.ResumeAutomatic ||
powerStatus == PowerEventType.ResumeCritical ||
powerStatus == PowerEventType.ResumeStandBy ||
powerStatus == PowerEventType.ResumeSuspend
)
{
_controller.ExecutePendingDeletions();
// call Recording-folder cleanup, just in case we have empty folders.
}
return(false);
}
