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package tim.prune.undo;
import tim.prune.I18nManager;
import tim.prune.UpdateMessageBroker;
import tim.prune.data.DataPoint;
import tim.prune.data.Field;
import tim.prune.data.Track;
import tim.prune.data.TrackInfo;
/**
* Operation to undo a conversion from names to times
*/
public class UndoConvertNamesToTimes implements UndoOperation
{
/** Start and end indices of section */
private int _startIndex, _endIndex;
/** Waypoint names before operation */
private String[] _waypointNames = null;
/** Timestamp strings before operation */
private String[] _timestamps = null;
/**
* Constructor
* @param inTrackInfo track info object to copy values from
*/
public UndoConvertNamesToTimes(TrackInfo inTrackInfo)
{
_startIndex = inTrackInfo.getSelection().getStart();
_endIndex = inTrackInfo.getSelection().getEnd();
final int numPoints = _endIndex - _startIndex + 1;
_waypointNames = new String[numPoints];
_timestamps = new String[numPoints];
// Loop over points in selection, and copy names and timestamps
for (int i=_startIndex; i<=_endIndex; i++)
{
DataPoint point = inTrackInfo.getTrack().getPoint(i);
if (point.isWaypoint())
{
_waypointNames[i-_startIndex] = point.getWaypointName();
_timestamps[i-_startIndex] = point.getFieldValue(Field.TIMESTAMP);
}
}
}
/**
* @return description of operation
*/
public String getDescription()
{
return I18nManager.getText("undo.convertnamestotimes");
}
/**
* Perform the undo operation on the given Track
* @param inTrackInfo TrackInfo object on which to perform the operation
*/
public void performUndo(TrackInfo inTrackInfo) throws UndoException
{
// Sanity check
Track track = inTrackInfo.getTrack();
if (track.getNumPoints() <= _endIndex || _endIndex <= _startIndex) {
throw new UndoException("Cannot undo conversion, track length doesn't match");
}
// Loop over points in selection and replace names and timestamps
for (int i=_startIndex; i<=_endIndex; i++)
{
String storedName = _waypointNames[i-_startIndex];
if (storedName != null)
{
// point had a name before the operation, so might have been converted
DataPoint point = track.getPoint(i);
point.setFieldValue(Field.WAYPT_NAME, storedName, true);
point.setFieldValue(Field.TIMESTAMP, _timestamps[i-_startIndex], true);
}
}
track.requestRescale();
UpdateMessageBroker.informSubscribers();
}
}
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