/**
* Gets the owner {@link PictogramElement} of a Label from a given PictogramElement. The given PE
* may already be the owner of the Label, in which case the given value is returned. See also
* {@link FeatureSupport#getLabelOwner(IContext)}
*
* @param pe a PictogramElement that represents the Label shape. This may be either the Label
* shape or its owner.
* @return the PictogramElement that is the owner of a Label shape.
*/
public static PictogramElement getLabelOwner(PictogramElement pe) {
DiagramElement de = BusinessObjectUtil.getFirstElementOfType(pe, DiagramElement.class);
if (de != null) return pe;
ContainerShape cs = BusinessObjectUtil.getFirstElementOfType(pe, ContainerShape.class);
de = BusinessObjectUtil.getFirstElementOfType(cs, DiagramElement.class);
if (de != null) return cs;
// Messages attached to MessageFlows do not have a BPMNShape element, their
// visibility is controlled by a setting on the BPMNEdge for the MessageFlow
Message msg = BusinessObjectUtil.getFirstElementOfType(cs, Message.class);
if (msg != null) return cs;
// If this is the ContainerShape of the MessageFlow Message, then it is the label owner.
if (pe instanceof ContainerShape) {
Shape labelShape = BusinessObjectUtil.getFirstElementOfType(pe, Shape.class);
if (FeatureSupport.isLabelShape(labelShape)) return pe;
}
Connection c = BusinessObjectUtil.getFirstElementOfType(pe, Connection.class);
de = BusinessObjectUtil.getFirstElementOfType(c, DiagramElement.class);
if (de != null) return c;
return null;
}
