//---------------------------------------------------------
// construct dual graph, marks dual edges corresponding to generalization
// in m_primalIsGen
// assumes that m_pDual, m_primalAdj and m_nodeOf are already constructed
//
void FixEdgeInserterUMLCore::constructDual(const CombinatorialEmbedding &E)
{
// insert a node in the dual graph for each face in E
for(face f : E.faces)
m_nodeOf[f] = m_dual.newNode();
// Insert an edge into the dual graph for each adjacency entry in E.
// The edges are directed from the left face to the right face.
for(node v : m_pr.nodes)
{
for(adjEntry adj : v->adjEdges)
{
node vLeft = m_nodeOf[E.leftFace (adj)];
node vRight = m_nodeOf[E.rightFace(adj)];
edge e = m_dual.newEdge(vLeft,vRight);
m_primalAdj[e] = adj;
// mark dual edges corresponding to generalizations
if (m_pr.typeOf(adj->theEdge()) == Graph::generalization)
m_primalIsGen[e] = true;
}
}
// Augment the dual graph by two new vertices. These are used temporarily
// when searching for a shortest path in the dual graph.
m_vS = m_dual.newNode();
m_vT = m_dual.newNode();
}
void FixEdgeInserterCore::removeEdge(CombinatorialEmbedding &E, edge eOrig)
{
const List<edge> &path = m_pr.chain(eOrig);
for(edge e : path)
{
adjEntry adj = e->adjSource();
m_delFaces->insert(E.leftFace (adj));
m_delFaces->insert(E.rightFace (adj));
}
// delete all corresponding nodes in dual
for(face f : m_delFaces->faces())
m_dual.delNode(m_nodeOf[f]);
m_delFaces->clear();
// remove edge path from PG
m_pr.removeEdgePathEmbedded(E,eOrig,*m_newFaces);
// update dual
// insert new nodes
for(face f : m_newFaces->faces()) {
m_nodeOf[f] = m_dual.newNode();
}
// insert new edges into dual
for(face f : m_newFaces->faces())
insertEdgesIntoDualAfterRemove(E, f);
m_newFaces->clear();
}
//---------------------------------------------------------
// construct dual graph
// assumes that m_pDual, m_primalAdj and m_nodeOf are already constructed
//
void FixEdgeInserterCore::constructDual(const CombinatorialEmbedding &E)
{
// insert a node in the dual graph for each face in E
for(face f : E.faces)
m_nodeOf[f] = m_dual.newNode();
// Insert an edge into the dual graph for each adjacency entry in E.
// The edges are directed from the left face to the right face.
for(node v : m_pr.nodes)
{
for(adjEntry adj : v->adjEdges)
{
// Do not insert edges into dual if crossing the original edge
// is forbidden
if(m_pForbidden && (*m_pForbidden)[m_pr.original(adj->theEdge())] == true)
continue;
node vLeft = m_nodeOf[E.leftFace (adj)];
node vRight = m_nodeOf[E.rightFace(adj)];
m_primalAdj[m_dual.newEdge(vLeft,vRight)] = adj;
}
}
// Augment the dual graph by two new vertices. These are used temporarily
// when searching for a shortest path in the dual graph.
m_vS = m_dual.newNode();
m_vT = m_dual.newNode();
}
face SimpleEmbedder::findBestExternalFace(
const PlanRep& PG,
const CombinatorialEmbedding& E)
{
FaceArray<int> weight(E);
for(face f : E.faces)
weight[f] = f->size();
for(node v : PG.nodes)
{
if(PG.typeOf(v) != Graph::generalizationMerger)
continue;
adjEntry adjFound = nullptr;
for(adjEntry adj : v->adjEdges) {
if (adj->theEdge()->source() == v) {
adjFound = adj;
break;
}
}
OGDF_ASSERT(adjFound->theEdge()->source() == v);
node w = adjFound->theEdge()->target();
bool isBase = true;
for(adjEntry adj : w->adjEdges) {
edge e = adj->theEdge();
if(e->target() != w && PG.typeOf(e) == Graph::generalization) {
isBase = false;
break;
}
}
if(isBase == false)
continue;
face f1 = E.leftFace(adjFound);
face f2 = E.rightFace(adjFound);
weight[f1] += v->indeg();
if(f2 != f1)
weight[f2] += v->indeg();
}
face fBest = E.firstFace();
for(face f : E.faces)
if(weight[f] > weight[fBest])
fBest = f;
return fBest;
}
void FixEdgeInserterUMLCore::insertEdgesIntoDual(const CombinatorialEmbedding &E, adjEntry adjSrc)
{
face f = E.rightFace(adjSrc);
node vRight = m_nodeOf[f];
adjEntry adj1 = f->firstAdj(), adj = adj1;
do {
node vLeft = m_nodeOf[E.leftFace(adj)];
edge eLR = m_dual.newEdge(vLeft,vRight);
m_primalAdj[eLR] = adj;
edge eRL = m_dual.newEdge(vRight,vLeft);
m_primalAdj[eRL] = adj->twin();
if(m_pr.typeOf(adj->theEdge()) == Graph::generalization)
m_primalIsGen[eLR] = m_primalIsGen[eRL] = true;
}
while((adj = adj->faceCycleSucc()) != adj1);
// the other face adjacent to *itEdge ...
f = E.rightFace(adjSrc->twin());
vRight = m_nodeOf[f];
adj1 = f->firstAdj();
adj = adj1;
do {
node vLeft = m_nodeOf[E.leftFace(adj)];
edge eLR = m_dual.newEdge(vLeft,vRight);
m_primalAdj[eLR] = adj;
edge eRL = m_dual.newEdge(vRight,vLeft);
m_primalAdj[eRL] = adj->twin();
if(m_pr.typeOf(adj->theEdge()) == Graph::generalization)
m_primalIsGen[eLR] = m_primalIsGen[eRL] = true;
}
while((adj = adj->faceCycleSucc()) != adj1);
}
void FixEdgeInserterCore::insertEdgesIntoDual(const CombinatorialEmbedding &E, adjEntry adjSrc)
{
face f = E.rightFace(adjSrc);
node vRight = m_nodeOf[f];
adjEntry adj1 = f->firstAdj(), adj = adj1;
do {
if(m_pForbidden && (*m_pForbidden)[m_pr.original(adj->theEdge())] == true)
continue;
node vLeft = m_nodeOf[E.leftFace(adj)];
edge eLR = m_dual.newEdge(vLeft,vRight);
m_primalAdj[eLR] = adj;
edge eRL = m_dual.newEdge(vRight,vLeft);
m_primalAdj[eRL] = adj->twin();
}
while((adj = adj->faceCycleSucc()) != adj1);
// the other face adjacent to *itEdge ...
f = E.rightFace(adjSrc->twin());
vRight = m_nodeOf[f];
adj1 = f->firstAdj();
adj = adj1;
do {
if(m_pForbidden && (*m_pForbidden)[m_pr.original(adj->theEdge())] == true)
continue;
node vLeft = m_nodeOf[E.leftFace(adj)];
edge eLR = m_dual.newEdge(vLeft,vRight);
m_primalAdj[eLR] = adj;
edge eRL = m_dual.newEdge(vRight,vLeft);
m_primalAdj[eRL] = adj->twin();
}
while((adj = adj->faceCycleSucc()) != adj1);
}
face SimpleEmbedder::findBestExternalFace(const PlanRep& PG,
const CombinatorialEmbedding& E)
{
FaceArray<int> weight(E);
face f;
forall_faces(f,E)
weight[f] = f->size();
node v;
forall_nodes(v,PG)
{
if(PG.typeOf(v) != Graph::generalizationMerger)
continue;
adjEntry adj;
forall_adj(adj,v) {
if(adj->theEdge()->source() == v)
break;
}
OGDF_ASSERT(adj->theEdge()->source() == v);
node w = adj->theEdge()->target();
bool isBase = true;
adjEntry adj2;
forall_adj(adj2, w) {
edge e = adj2->theEdge();
if(e->target() != w && PG.typeOf(e) == Graph::generalization) {
isBase = false;
break;
}
}
if(isBase == false)
continue;
face f1 = E.leftFace(adj);
face f2 = E.rightFace(adj);
weight[f1] += v->indeg();
if(f2 != f1)
weight[f2] += v->indeg();
}
void FixEdgeInserterUMLCore::insertEdgesIntoDualAfterRemove(const CombinatorialEmbedding &E, face f)
{
node vRight = m_nodeOf[f];
adjEntry adj1 = f->firstAdj(), adj = adj1;
do {
node vLeft = m_nodeOf[E.leftFace(adj)];
edge eLR = m_dual.newEdge(vLeft,vRight);
m_primalAdj[eLR] = adj;
edge eRL = m_dual.newEdge(vRight,vLeft);
m_primalAdj[eRL] = adj->twin();
if(m_pr.typeOf(adj->theEdge()) == Graph::generalization)
{
m_primalIsGen[eLR] = m_primalIsGen[eRL] = true;
}
}
while((adj = adj->faceCycleSucc()) != adj1);
}
void FixEdgeInserterCore::insertEdge(CombinatorialEmbedding &E, edge eOrig, const SList<adjEntry> &crossed)
{
// remove dual nodes on insertion path
SListConstIterator<adjEntry> it;
for(it = crossed.begin(); it != crossed.rbegin(); ++it) {
m_dual.delNode(m_nodeOf[E.rightFace(*it)]);
}
// update primal
m_pr.insertEdgePathEmbedded(eOrig,E,crossed);
// insert new face nodes into dual
const List<edge> &path = m_pr.chain(eOrig);
for(edge e : path)
{
adjEntry adj = e->adjSource();
m_nodeOf[E.leftFace (adj)] = m_dual.newNode();
m_nodeOf[E.rightFace(adj)] = m_dual.newNode();
}
// insert new edges into dual
for(edge e : path)
insertEdgesIntoDual(E, e->adjSource());
}