public boolean step() throws SyntaxError {
Note note = diagram.getDataProvider().getNote();
if (note != null) {
freeNoteNumber = Math.max(freeNoteNumber, note.getNumber() + 1);
diagram.getPaintDevice().addSequenceElement(note);
notes.add(note);
closeNote(note.getLocation().getName());
diagram.getFragmentManager().openFragments();
diagram.getPaintDevice().announce(note.getHeight());
note.setTop(diagram.getVerticalPosition());
if (note.isConsuming()) {
diagram.extendLifelines(note.getHeight());
} else {
pendingNotes.put(note.getLocation().getName(), note);
}
if (diagram.getDataProvider().getState() != null) {
diagram.addToStateMap(note, diagram.getDataProvider().getState());
}
diagram.getFragmentManager().clearLabels();
return true;
}
Pair<Lifeline, Integer> eventAssoc = diagram.getDataProvider().getEventAssociation();
if (eventAssoc != null) {
associateEvent(eventAssoc.getFirst(), eventAssoc.getSecond());
return true;
}
return false;
}
private void associateEvent(Lifeline line, int descriptionNumber) {
List<Pair<Lifeline, Integer>> pairs = eventAssociation.get(descriptionNumber);
if (pairs == null) {
pairs = new LinkedList<Pair<Lifeline, Integer>>();
eventAssociation.put(descriptionNumber, pairs);
}
pairs.add(new Pair<Lifeline, Integer>(line, diagram.getVerticalPosition()));
}
/**
* @param lifeline the name of a lifeline that may have a non-consuming note box associated to it
*/
void closeNote(String lifeline) {
Note note = pendingNotes.get(lifeline);
if (note != null) {
int diff = note.getTop() + note.getHeight() - diagram.getVerticalPosition();
if (diff > 0) {
diagram.extendLifelines(diff);
}
pendingNotes.remove(lifeline);
}
}
