content: package tim.prune.cmd;
  
  import tim.prune.data.DataPoint;
  import tim.prune.data.Track;
  import tim.prune.data.TrackInfo;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Command class to perform the segment-sewing
   */
  public class SewSegmentsCmd extends CompoundCommand
  {
  	private final List<Integer> _indexesToDelete;
  
  	/**
  	 * Constructor
  	 * @param inIndexesToKeep list of indexes to keep, in order
  	 * @param inIndexesToDelete list of indexes to delete
  	 * @param inSegmentFlags list of segment flags to set
  	 */
  	public SewSegmentsCmd(List<Integer> inIndexesToKeep, List<Integer> inIndexesToDelete,
  		List<PointFlag> inSegmentFlags)
  	{
  		_indexesToDelete = inIndexesToDelete;
  		addCommand(new RearrangePointsCmd(combine(inIndexesToKeep, inIndexesToDelete)));
  		addCommand(new DeleteFinalRangeCmd(inIndexesToDelete.size()));
  		addCommand(new SetSegmentsCmd(inSegmentFlags));
  	}
  
  	private List<Integer> combine(List<Integer> inIndexesToKeep, List<Integer> inIndexesToDelete)
  	{
  		ArrayList<Integer> allPoints = new ArrayList<>(inIndexesToKeep);
  		allPoints.addAll(inIndexesToDelete);
  		return allPoints;
  	}
  
  	/**
  	 * @return the number of segment joins made
  	 */
  	public int getNumJoins() {
  		return _indexesToDelete.size();
  	}
  
  	@Override
  	protected Command makeInverse(TrackInfo inInfo)
  	{
  		return makeInverse(inInfo, null,
  			new AppendRangeCmd(getCommand(1), getDeletedPoints(inInfo.getTrack())), null);
  	}
  
  	private List<DataPoint> getDeletedPoints(Track inTrack)
  	{
  		ArrayList<DataPoint> points = new ArrayList<>();
  		for (int index : _indexesToDelete) {
  			points.add(inTrack.getPoint(index));
  		}
  		return points;
  	}
  }
  