Track *SyncLockedTracksIterator::StartWith(Track * member)
{
Track *t = NULL;
// A sync-locked group consists of any positive number of wave tracks followed by any
// non-negative number of label tracks. Step back through any label tracks,
// and then through the wave tracks above them.
while (member && member->GetKind() == Track::Label) {
member = l->GetPrev(member);
}
while (member && (member->GetKind() == Track::Wave
#ifdef USE_MIDI
|| member->GetKind() == Track::Note
#endif
)) {
t = member;
member = l->GetPrev(member);
}
// Make it current (if t is still NULL there are no wave tracks, so we're
// not in a sync-locked group).
if (t)
cur = (TrackListNode *) t->GetNode();
mInLabelSection = false;
return t;
}
bool TrackList::MoveDown(Track * t)
{
if (t) {
Track *n = GetNext(t, true);
if (n) {
SwapNodes(t->GetNode(), n->GetNode());
return true;
}
}
return false;
}
bool TrackList::MoveUp(Track * t)
{
if (t) {
Track *p = GetPrev(t, true);
if (p) {
SwapNodes(p->GetNode(), t->GetNode());
return true;
}
}
return false;
}
// Precondition: if either of s1 or s2 are "linked", then
// s1 and s2 must each be the FIRST node of the linked pair.
//
// This is used when you want to swap the track or pair of
// tracks in s1 with the track or pair of tracks in s2.
// The complication is that the tracks are stored in a single
// linked list, and pairs of tracks are marked only by a flag
// in one of the tracks.
void TrackList::SwapNodes(TrackListNode * s1, TrackListNode * s2)
{
Track *link;
Track *source[4];
TrackListNode *target[4];
// if a null pointer is passed in, we want to know about it
wxASSERT(s1);
wxASSERT(s2);
// Deal with firat track in each team
link = s1->t->GetLink();
if (!s1->t->GetLinked() && link) {
s1 = (TrackListNode *) link->GetNode();
}
link = s2->t->GetLink();
if (!s2->t->GetLinked() && link) {
s2 = (TrackListNode *) link->GetNode();
}
target[0] = s1;
source[0] = target[0]->t;
if (source[0]->GetLinked()) {
target[1] = target[0]->next;
source[1] = target[1]->t;
}
else {
target[1] = NULL;
source[1] = NULL;
}
target[2] = s2;
source[2] = target[2]->t;
if (source[2]->GetLinked()) {
target[3] = target[2]->next;
source[3] = target[3]->t;
}
else {
target[3] = NULL;
source[3] = NULL;
}
int s = 2;
for (int t = 0; t < 4; t++) {
if (target[t]) {
target[t]->t = source[s];
target[t]->t->SetOwner(NULL, NULL);
target[t]->t->SetOwner(this, target[t]);
s = (s + 1) % 4;
if (!source[s]) {
s = (s + 1) % 4;
}
}
}
RecalcPositions(s1);
UpdatedEvent(s1);
ResizedEvent(s1);
}
// This is used when you want to swap the track or pair of
// tracks in s1 with the track or pair of tracks in s2.
// The complication is that the tracks are stored in a single
// linked list, and pairs of tracks are marked only by a flag
// in one of the tracks.
void TrackList::SwapNodes(TrackNodePointer s1, TrackNodePointer s2)
{
// if a null pointer is passed in, we want to know about it
wxASSERT(!isNull(s1));
wxASSERT(!isNull(s2));
// Deal with first track in each team
Track *link;
link = (*s1)->GetLink();
bool linked1 = link != nullptr;
if (linked1 && !(*s1)->GetLinked()) {
s1 = link->GetNode();
}
link = (*s2)->GetLink();
bool linked2 = link != nullptr;
if (linked2 && !(*s2)->GetLinked()) {
s2 = link->GetNode();
}
// Safety check...
if (s1 == s2)
return;
// Be sure s1 is the earlier iterator
if ((*s1)->GetIndex() >= (*s2)->GetIndex()) {
std::swap(s1, s2);
std::swap(linked1, linked2);
}
// Remove tracks
value_type save11 = std::move(*s1), save12{};
s1 = erase(s1);
if (linked1) {
wxASSERT(s1 != s2);
save12 = std::move(*s1), s1 = erase(s1);
}
const bool same = (s1 == s2);
value_type save21 = std::move(*s2), save22{};
s2 = erase(s2);
if (linked2)
save22 = std::move(*s2), s2 = erase(s2);
if (same)
// We invalidated s1!
s1 = s2;
// Reinsert them
Track *pTrack;
if (save22)
pTrack = save22.get(), pTrack->SetOwner(this, s1 = insert(s1, std::move(save22)));
pTrack = save21.get(), pTrack->SetOwner(this, s1 = insert(s1, std::move(save21)));
if (save12)
pTrack = save12.get(), pTrack->SetOwner(this, s2 = insert(s2, std::move(save12)));
pTrack = save11.get(), pTrack->SetOwner(this, s2 = insert(s2, std::move(save11)));
// Now correct the Index in the tracks, and other things
RecalcPositions(s1);
UpdatedEvent(s1);
ResizedEvent(s1);
}