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package tim.prune.undo;
import tim.prune.I18nManager;
import tim.prune.data.DataPoint;
import tim.prune.data.TrackInfo;
/**
* Operation to undo an interpolation
*/
public class UndoInterpolate implements UndoOperation
{
private int _startIndex = 0;
private int _totalInserted = 0;
private DataPoint[] _points = null;
/**
* Constructor
* @param inTrackInfo track info object
* @param inTotalInserted total number of points inserted
*/
public UndoInterpolate(TrackInfo inTrackInfo, int inTotalInserted)
{
_startIndex = inTrackInfo.getSelection().getStart();
_points = inTrackInfo.cloneSelectedRange();
_totalInserted = inTotalInserted;
}
/**
* @return description of operation including parameters
*/
public String getDescription()
{
return I18nManager.getText("undo.insert") + " (" + _totalInserted + ")";
}
/**
* Perform the undo operation on the given TrackInfo
* @param inTrackInfo TrackInfo object on which to perform the operation
*/
public void performUndo(TrackInfo inTrackInfo) throws UndoException
{
// Work out how many points were in the track before the interpolation
final int newSize = inTrackInfo.getTrack().getNumPoints() - _totalInserted;
DataPoint[] oldPoints = inTrackInfo.getTrack().cloneContents();
DataPoint[] newPoints = new DataPoint[newSize];
// Restore track to previous values
System.arraycopy(oldPoints, 0, newPoints, 0, _startIndex);
System.arraycopy(_points, 0, newPoints, _startIndex, _points.length);
int endIndex = _startIndex + _points.length;
System.arraycopy(oldPoints, endIndex + _totalInserted, newPoints, endIndex, newSize - endIndex);
inTrackInfo.getTrack().replaceContents(newPoints);
// reset selection
inTrackInfo.getSelection().clearAll();
}
}
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