#8 Presence of mixed/closed shapes causes the mixed to disappea

[Anonymous]

Example:

http://ditaa.org/ditaa/render?grid=+++++%2B---------%2B+++%2B---------%2B%0D%0A+++++%7C+++++++++%7C+++%7C+++++++++%7C%0D%0A+----%2B---++++++%7C+++%7C+++++++++%7C%0D%0A+++++%7C+++++++++%7C+++%7C+++++++++%7C%0D%0A+++++%2B---------%2B+++%2B---------%2B%0D%0A&scale=1&background=FFFFFF&E=on&timeout=10

I guess the problem occurs due to not calling breakTrulyMixedBoundaries for the mixed shapes (i.e. not using slower method as given in the comment). I gave the following fix (marked >>> below) in line 243 of Diagram.java SVN revision 80 and it is working, but I am not sure if this is the correct fix.

//subtract from each of the mixed sets all the closed sets
sets = mixed.iterator();
while(sets.hasNext()){
CellSet set = (CellSet) sets.next();
Iterator<CellSet> closedSets = closed.iterator();
while(closedSets.hasNext()){
CellSet closedSet = closedSets.next();
set.subtractSet(closedSet);
}

>>> boundarySetsStep2.remove(set);
>>> boundarySetsStep2.addAll(set.breakTrulyMixedBoundaries(workGrid));

// this is necessary because some mixed sets produce
// several distinct open sets after you subtract the
// closed sets from them
if(set.getType(workGrid) == CellSet.TYPE_OPEN) {
boundarySetsStep2.remove(set);
boundarySetsStep2.addAll(set.breakIntoDistinctBoundaries(workGrid));
}
}