/**
* Returns a list of the allowed siblings with their occurrence for a given {@link OverlayWidget}
* <tt>overlayWidget</tt>. This implementation returns all allowed siblings according to this
* overlay widget's parent's {@link
* org.nsesa.editor.gwt.core.client.ui.overlay.document.OverlayWidget#getStructureIndicator()}.
*
* @param documentController the document controller
* @param overlayWidget the overlay widget to get the allowed siblings for
* @return the allowed siblings
*/
@Override
public List<OverlayWidget> getAllowedSiblings(
final DocumentController documentController, final OverlayWidget overlayWidget) {
if (overlayWidget.getParentOverlayWidget() != null) {
return getAllowedChildren(documentController, overlayWidget.getParentOverlayWidget());
} else {
// probably dealing with a root node
return new ArrayList<OverlayWidget>();
}
}
/**
* Returns the list of the allowed child types as they are coming from {@link StructureIndicator}
* structure
*
* @return the list of the allowed child types
*/
private List<OverlayWidget> getAllowedChildTypes(OverlayWidget overlayWidget) {
List<OverlayWidget> allowedChildren = new ArrayList<OverlayWidget>();
List<StructureIndicator> stack = new ArrayList<StructureIndicator>();
stack.add(overlayWidget.getStructureIndicator());
while (!stack.isEmpty()) {
StructureIndicator structureIndicator = stack.remove(0);
if (structureIndicator instanceof StructureIndicator.Element) {
StructureIndicator.Element elemIndicator = (StructureIndicator.Element) structureIndicator;
OverlayWidget candidate = elemIndicator.asWidget();
allowedChildren.add(candidate);
} else {
if (structureIndicator.getIndicators() != null) {
stack.addAll(structureIndicator.getIndicators());
}
}
}
return allowedChildren;
}