ChordRest* prevChordRest(ChordRest* cr)
{
if (!cr)
return 0;
if (cr->isGrace()) {
// cr is a grace note
Chord* c = static_cast<Chord*>(cr);
Chord* pc = static_cast<Chord*>(cr->parent());
QList<Chord*> graceNotesBefore;
QList<Chord*> graceNotesAfter;
if(cr->isGraceBefore()){
pc->getGraceNotesBefore(&graceNotesBefore);
auto i = std::find(graceNotesBefore.begin(),graceNotesBefore.end(), c);
if (i == graceNotesBefore.end())
return 0;
if (i == graceNotesBefore.begin())
cr = pc;
else
return *--i;
}
else {
int n = pc->getGraceNotesAfter(&graceNotesAfter);
for(int i = 0; i < n; i++){
if(c == graceNotesAfter[(i)]){
if(i > 0)
return graceNotesAfter[i - 1];
else
return 0;
}
}
}
}
else {
if (cr->type() == Element::CHORD) {
Chord* c = static_cast<Chord*>(cr);
if (!c->graceNotes().empty())
return c->graceNotes().back();
}
}
int track = cr->track();
Segment::SegmentTypes st = Segment::SegChordRest;
for (Segment* seg = cr->segment()->prev1(st); seg; seg = seg->prev1(st)) {
ChordRest* e = static_cast<ChordRest*>(seg->element(track));
if (e)
return e;
}
return 0;
}
ChordRest* nextChordRest(ChordRest* cr)
{
if (!cr)
return 0;
if (cr->isGrace()) {
//
// cr is a grace note
Chord* c = static_cast<Chord*>(cr);
Chord* pc = static_cast<Chord*>(cr->parent());
if (cr->isGraceBefore()) {
QList<Chord*> graceNotesBefore;
pc->getGraceNotesBefore(&graceNotesBefore);
auto i = std::find(graceNotesBefore.begin(), graceNotesBefore.end(), c);
if (i == graceNotesBefore.end())
return 0; // unable to find self?
++i;
if (i != graceNotesBefore.end())
return *i;
// if this was last grace note before, return parent
return pc;
}
else {
QList<Chord*> graceNotesAfter;
pc->getGraceNotesAfter(&graceNotesAfter);
auto i = std::find(graceNotesAfter.begin(), graceNotesAfter.end(), c);
if (i == graceNotesAfter.end())
return 0; // unable to find self?
++i;
if (i != graceNotesAfter.end())
return *i;
// if this was last grace note after, fall through to find next main note
cr = pc;
}
}
else {
//
// cr is not a grace note
if (cr->type() == Element::Type::CHORD) {
Chord* c = static_cast<Chord*>(cr);
if (!c->graceNotes().empty()) {
QList<Chord*> graceNotesAfter;
c->getGraceNotesAfter(&graceNotesAfter);
if (!graceNotesAfter.isEmpty())
return graceNotesAfter.first();
}
}
}
int track = cr->track();
Segment::Type st = Segment::Type::ChordRest;
for (Segment* seg = cr->segment()->next1MM(st); seg; seg = seg->next1MM(st)) {
ChordRest* e = static_cast<ChordRest*>(seg->element(track));
if (e) {
if (e->type() == Element::Type::CHORD) {
Chord* c = static_cast<Chord*>(e);
if (!c->graceNotes().empty()) {
QList<Chord*> graceNotesBefore;
c->getGraceNotesBefore(&graceNotesBefore);
if (!graceNotesBefore.isEmpty())
return graceNotesBefore.first();
}
}
return e;
}
}
return 0;
}
