public static List <AutomationElement> FindAll(AutomationElement root, TreeScope scope, Condition condition, int processId)
{
return((List <AutomationElement>) STAHelper.Invoke(
delegate() {
int elementProcessId = (int)root.GetCurrentPropertyValue(AutomationElement.ProcessIdProperty);
if (elementProcessId != processId)
{
// This happens when the element represents the desktop.
// We could just filter using the ProcessIdProperty but this searches all nodes and *then* filters,
// which is incredibly slow if we're searching a lot of nodes (i.e. TreeScope is Descendant).
// Instead we find all direct children with the right process id and then search them inclusively.
// Helpfully, there's a Subtree TreeScope which does what we want
Condition processCondition = new PropertyCondition2(AutomationElement.ProcessIdProperty, processId);
if (scope == TreeScope.Descendants)
{
List <AutomationElement> roots = AutomationExtensions.FindAllRaw(root, TreeScope.Children, processCondition);
List <AutomationElement> mergedResults = new List <AutomationElement>();
foreach (AutomationElement currentRoot in roots)
{
mergedResults.AddRange(FindAll(currentRoot, TreeScope.Subtree, condition, processId));
}
return mergedResults;
}
else
{
condition = (condition == null) ? processCondition : new AndCondition(condition, processCondition);
}
}
if (condition == null)
{
condition = Condition.TrueCondition;
}
return AutomationExtensions.FindAllRaw(root, scope, condition);
}
));
}