public static TreeItem getMatchingItem(Object data, SynchronizedTreeViewer viewer) {
if (data == null) return null;
if (data instanceof EmptyElement) {
data = ((EmptyElement) data).getRepresentedMissingElement();
}
TreeItem item = (TreeItem) viewer.findItem(data);
if (item != null && !item.isDisposed()) {
if (item.getParentItem() != null && !item.getParentItem().getExpanded()) {
return null;
}
return item;
}
// look in the given viewer for any EmptyElement instances
// that represent the given data
TreeItem[] items = viewer.getTree().getItems();
EmptyElement empty = locateEmptyElement(items, data);
if (empty != null) {
return (TreeItem) viewer.findItem(empty);
}
return null;
}
