internal IEnumerable <ModelItem> GetItemsOnDesigner(bool preOrder, bool excludeRoot, bool excludeErrorActivity, bool excludeExpression, bool includeOtherObjects)
{
WorkflowViewService viewService = this.WorkflowViewService;
IList <ModelItem> items =
ModelTreeManager.DepthFirstSearch(modelService.Root,
delegate(Type type)
{
// Only find items on the designer surface.
return(includeOtherObjects || (typeof(WorkflowViewElement).IsAssignableFrom(viewService.GetDesignerType(type))));
},
delegate(ModelItem modelItem)
{
return(!(excludeExpression && modelItem != null && typeof(ITextExpression).IsAssignableFrom(modelItem.ItemType)));
},
preOrder);
// ModelItemKeyValuePair is associated with CaseDesigner.
// So ModelItemKeyValuePair will be returned even if they are not really Cases.
// Those ModelItemKeyValuePairs need to be excluded.
IEnumerable <ModelItem> itemsToSearch = null;
if (!excludeErrorActivity)
{
itemsToSearch = items.Where <ModelItem>(item => !ModelUtilities.IsModelItemKeyValuePair(item.ItemType) ||
ModelUtilities.IsSwitchCase(item));
}
else
{
itemsToSearch = items.Where <ModelItem>(item =>
(!ModelUtilities.IsModelItemKeyValuePair(item.ItemType) || ModelUtilities.IsSwitchCase(item)) &&
!IsErrorActivity(item));
}
if (excludeRoot)
{
itemsToSearch = itemsToSearch.Except <ModelItem>(new ModelItem[] { modelService.Root });
}
return(itemsToSearch);
}