content: package tim.prune.cmd;
  
  import tim.prune.data.DataPoint;
  import tim.prune.data.TrackInfo;
  import tim.prune.function.Describer;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Command to shuffle the existing points into a different order,
   * and then crop to a reduced number of points.
   * Used by for example compression, or delete rectangle
   */
  public class ShuffleAndCropCmd extends CompoundCommand
  {
  	private final List<Integer> _indexesToDelete = new ArrayList<>();
  
  	/**
  	 * Constructor
  	 * @param inIndexesToKeep list of indexes to keep
  	 * @param inIndexesToDelete list of indexes to delete
  	 * @param inSegmentFlags list of point flags
  	 */
  	public ShuffleAndCropCmd(List<Integer> inIndexesToKeep, List<Integer> inIndexesToDelete,
  		List<PointFlag> inSegmentFlags)
  	{
  		List<Integer> totalIndexes = makeTotalIndexes(inIndexesToKeep, inIndexesToDelete);
  		addCommand(new RearrangePointsCmd(totalIndexes));
  		addCommand(new DeleteFinalRangeCmd(inIndexesToDelete.size()));
  		if (inSegmentFlags != null && !inSegmentFlags.isEmpty()) {
  			addCommand(new SetSegmentsCmd(inSegmentFlags));
  		}
  		_indexesToDelete.addAll(inIndexesToDelete);
  
  		Describer confirmDescriber = new Describer("confirm.deletepoint.single", "confirm.deletepoint.multi");
  		setConfirmText(confirmDescriber.getDescriptionWithCount(inIndexesToDelete.size()));
  		Describer undoDescriber = new Describer("undo.deletepoint", "undo.deletepoints");
  		setDescription(undoDescriber.getDescriptionWithCount(inIndexesToDelete.size()));
  	}
  
  	/**
  	 * Build up a complete list of indexes, including the ones to be deleted
  	 * @param inIndexesToKeep indexes to retain
  	 * @param inIndexesToDelete indexes to delete
  	 * @return list suitable for a full rearrangement
  	 */
  	private static List<Integer> makeTotalIndexes(List<Integer> inIndexesToKeep, List<Integer> inIndexesToDelete)
  	{
  		ArrayList<Integer> indexes = new ArrayList<>(inIndexesToKeep);
  		indexes.addAll(inIndexesToDelete);
  		return indexes;
  	}
  
  	@Override
  	protected Command makeInverse(TrackInfo inInfo)
  	{
  		ArrayList<DataPoint> deletedPoints = new ArrayList<>();
  		for (int i : _indexesToDelete) {
  			deletedPoints.add(inInfo.getTrack().getPoint(i));
  		}
  		return makeInverse(inInfo, null, new AppendRangeCmd(deletedPoints), null);
  	}
  }
  