bool WaveTrack::SplitAt(double t)
{
for (WaveClipList::Node* it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip* c = it->GetData();
if (t > c->GetStartTime() && t < c->GetEndTime())
{
WaveClip* newClip = new WaveClip(*c, mDirManager);
if (!c->Clear(t, c->GetEndTime()))
{
delete newClip;
return false;
}
if (!newClip->Clear(c->GetStartTime(), t))
{
delete newClip;
return false;
}
newClip->Offset(t - c->GetStartTime());
mClips.Append(newClip);
return true;
}
}
return true;
}
//Trim trims within a clip, rather than trimming everything.
//If a bound is outside a clip, it trims everything.
bool WaveTrack::Trim (double t0, double t1)
{
bool inside0 = false;
bool inside1 = false;
//Keeps track of the offset of the first clip greater than
// the left selection t0.
double firstGreaterOffset = -1;
WaveClipList::Node * it;
for(it = GetClipIterator(); it; it = it->GetNext())
{
WaveClip * clip = it->GetData();
//Find the first clip greater than the offset.
//If we end up clipping the entire track, this is useful.
if(firstGreaterOffset < 0 &&
clip->GetStartTime() >= t0)
firstGreaterOffset = clip->GetStartTime();
if(t1 > clip->GetStartTime() && t1 < clip->GetEndTime())
{
if (!clip->Clear(t1,clip->GetEndTime()))
return false;
inside1 = true;
}
if(t0 > clip->GetStartTime() && t0 < clip->GetEndTime())
{
if (!clip->Clear(clip->GetStartTime(),t0))
return false;
clip->SetOffset(t0);
inside0 = true;
}
}
//if inside0 is false, then the left selector was between
//clips, so delete everything to its left.
if(false == inside1)
{
if (!Clear(t1,GetEndTime()))
return false;
}
if(false == inside0)
{
if (!Clear(0,t0))
return false;
//Reset the track offset to be at the point of the first remaining clip.
SetOffset(firstGreaterOffset );
}
return true;
}
bool WaveTrack::HandleClear(double t0, double t1,
bool addCutLines, bool split)
{
if (t1 < t0)
return false;
WaveClipList::Node* it;
WaveClipList clipsToDelete;
WaveClipList clipsToAdd;
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
if (t0 <= clip->GetStartTime() && t1 >= clip->GetEndTime())
{
// Whole clip must be deleted - remember this
clipsToDelete.Append(clip);
} else
if (t1 > clip->GetStartTime() && t0 < clip->GetEndTime())
{
// Clip data is affected by command
if (addCutLines)
{
if (!clip->ClearAndAddCutLine(t0,t1))
return false;
} else
{
if (split) {
// Three cases:
if (t0 <= clip->GetStartTime()) {
// Delete from the left edge
clip->Clear(clip->GetStartTime(), t1);
clip->Offset(t1-clip->GetStartTime());
} else
if (t1 >= clip->GetEndTime()) {
// Delete to right edge
clip->Clear(t0, clip->GetEndTime());
} else
{
// Delete in the middle of the clip...we actually create two
// new clips out of the left and right halves...
WaveClip *left = new WaveClip(*clip, mDirManager);
left->Clear(t0, clip->GetEndTime());
clipsToAdd.Append(left);
WaveClip *right = new WaveClip(*clip, mDirManager);
right->Clear(clip->GetStartTime(), t1);
right->Offset(t1-clip->GetStartTime());
clipsToAdd.Append(right);
clipsToDelete.Append(clip);
}
}
else {
if (!clip->Clear(t0,t1))
return false;
}
}
} else
if (clip->GetStartTime() >= t1)
{
// Clip is "behind" the region -- offset it unless we're splitting
if (!split)
clip->Offset(-(t1-t0));
}
}
for (it=clipsToDelete.GetFirst(); it; it=it->GetNext())
{
mClips.DeleteObject(it->GetData());
delete it->GetData();
}
for (it=clipsToAdd.GetFirst(); it; it=it->GetNext())
{
mClips.Append(it->GetData());
}
return true;
}
