protected override void StartLoop(NativeActivityContext context)
{
WindowsCacheExtension ext = context.GetExtension <WindowsCacheExtension>();
var sw = new Stopwatch();
sw.Start();
Log.Selector(string.Format("Windows.GetElement::begin {0:mm\\:ss\\.fff}", sw.Elapsed));
UIElement[] elements = null;
var selector = Selector.Get(context);
selector = OpenRPA.Interfaces.Selector.Selector.ReplaceVariables(selector, context.DataContext);
var sel = new WindowsSelector(selector);
var timeout = Timeout.Get(context);
var maxresults = MaxResults.Get(context);
var minresults = MinResults.Get(context);
if (maxresults < 1)
{
maxresults = 1;
}
var interactive = Interactive.Get(context);
var from = From.Get(context);
int failcounter = 0;
do
{
if (ClearCache != null && ClearCache.Get(context))
{
Log.Selector(string.Format("Windows.GetElement::Clearing windows element cache {0:mm\\:ss\\.fff}", sw.Elapsed));
WindowsSelectorItem.ClearCache();
}
if (PluginConfig.get_elements_in_different_thread)
{
elements = OpenRPA.AutomationHelper.RunSTAThread <UIElement[]>(() =>
{
try
{
Log.Selector(string.Format("Windows.GetElement::GetElementsWithuiSelector in non UI thread {0:mm\\:ss\\.fff}", sw.Elapsed));
return(WindowsSelector.GetElementsWithuiSelector(sel, from, maxresults, ext));
}
catch (System.Threading.ThreadAbortException)
{
}
catch (Exception ex)
{
Log.Error(ex.ToString());
}
return(new UIElement[] { });
}, PluginConfig.search_timeout).Result;
}
else
{
Log.Selector(string.Format("Windows.GetElement::GetElementsWithuiSelector using UI thread {0:mm\\:ss\\.fff}", sw.Elapsed));
elements = WindowsSelector.GetElementsWithuiSelector(sel, from, maxresults, ext);
if (elements == null || elements.Length == 0)
{
elements = WindowsSelector.GetElementsWithuiSelector(sel, from, maxresults, ext);
}
}
//elements = WindowsSelector.GetElementsWithuiSelector(sel, from, maxresults);
if (elements == null)
{
elements = new UIElement[] { };
}
if (elements.Length == 0)
{
Log.Selector(string.Format("Windows.GetElement::Found no elements {0:mm\\:ss\\.fff}", sw.Elapsed));
failcounter++;
}
if (failcounter > 2)
{
WindowsSelectorItem.ClearCache();
}
} while (elements != null && elements.Length == 0 && sw.Elapsed < timeout);
if (PluginConfig.get_elements_in_different_thread && elements.Length > 0)
{
// Get them again, we need the COM objects to be loaded in the UI thread
elements = WindowsSelector.GetElementsWithuiSelector(sel, from, maxresults, ext);
}
context.SetValue(Elements, elements);
var lastelements = context.GetValue(_lastelements);
if (lastelements == null)
{
lastelements = new UIElement[] { }
}
;
context.SetValue(_lastelements, elements);
if ((elements.Length + lastelements.Length) < minresults)
{
Log.Selector(string.Format("Windows.GetElement::Failed locating " + minresults + " item(s) {0:mm\\:ss\\.fff}", sw.Elapsed));
throw new ElementNotFoundException("Failed locating " + minresults + " item(s)");
}
IEnumerator <UIElement> _enum = elements.ToList().GetEnumerator();
bool more = _enum.MoveNext();
if (lastelements.Length == elements.Length && lastelements.Length > 0)
{
more = !System.Collections.StructuralComparisons.StructuralEqualityComparer.Equals(lastelements, elements);
}
if (more)
{
if (interactive)
{
var testelement = _enum.Current;
Wait.UntilResponsive(testelement.RawElement, PluginConfig.search_timeout);
}
context.SetValue(_elements, _enum);
context.SetValue(_sw, sw);
Log.Selector(string.Format("Windows.GetElement::end:: call ScheduleAction: {0:mm\\:ss\\.fff}", sw.Elapsed));
IncIndex(context);
SetTotal(context, elements.Length);
context.ScheduleAction <UIElement>(Body, _enum.Current, OnBodyComplete);
}
else
{
Log.Selector(string.Format("Windows.GetElement:end {0:mm\\:ss\\.fff}", sw.Elapsed));
}
}