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package tim.prune.cmd;
import tim.prune.DataSubscriber;
import tim.prune.data.DataPoint;
import tim.prune.data.TrackInfo;
import java.util.ArrayList;
/**
* Remove the end of the track, cropping it to a smaller size
*/
public class DeleteFinalRangeCmd extends Command
{
private final int _numPointsToDelete;
public DeleteFinalRangeCmd(int inNumToDelete) {
this(null, inNumToDelete);
}
protected DeleteFinalRangeCmd(Command inParent, int inNumToDelete)
{
super(inParent);
_numPointsToDelete = inNumToDelete;
}
@Override
public int getUpdateFlags() {
return DataSubscriber.DATA_ADDED_OR_REMOVED;
}
@Override
protected boolean executeCommand(TrackInfo inInfo)
{
if (_numPointsToDelete < 0 || _numPointsToDelete > inInfo.getTrack().getNumPoints()) {
return false;
}
inInfo.getTrack().cropTo(inInfo.getTrack().getNumPoints() - _numPointsToDelete);
inInfo.getSelection().clearAll();
return true;
}
@Override
protected Command makeInverse(TrackInfo inInfo)
{
ArrayList<DataPoint> points = new ArrayList<>();
final int totalPoints = inInfo.getTrack().getNumPoints();
final int startIdx = totalPoints - _numPointsToDelete;
for (int i=startIdx; i<totalPoints; i++) {
points.add(inInfo.getTrack().getPoint(i));
}
return new AppendRangeCmd(this, points);
}
}
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