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package tim.prune.undo;
import tim.prune.I18nManager;
import tim.prune.data.DataPoint;
import tim.prune.data.FileInfo;
import tim.prune.data.PhotoList;
import tim.prune.data.TrackInfo;
/**
* Operation to undo a load operation
*/
public class UndoLoad implements UndoOperation
{
private int _cropIndex = -1;
private int _numLoaded = -1;
private DataPoint[] _contents = null;
private PhotoList _photoList = null;
private FileInfo _oldFileInfo = null;
/**
* Constructor for appending
* @param inIndex index number of crop point
* @param inNumLoaded number of points loaded
*/
public UndoLoad(int inIndex, int inNumLoaded)
{
_cropIndex = inIndex;
_numLoaded = inNumLoaded;
_contents = null;
}
/**
* Constructor for replacing
* @param inOldTrackInfo track info being replaced
* @param inNumLoaded number of points loaded
* @param inPhotoList photo list, if any
*/
public UndoLoad(TrackInfo inOldTrackInfo, int inNumLoaded, PhotoList inPhotoList)
{
_cropIndex = -1;
_numLoaded = inNumLoaded;
_contents = inOldTrackInfo.getTrack().cloneContents();
_oldFileInfo = inOldTrackInfo.getFileInfo().clone();
_photoList = inPhotoList;
}
/**
* @return description of operation including number of points loaded
*/
public String getDescription()
{
String desc = I18nManager.getText("undo.load");
if (_numLoaded > 0)
desc = desc + " (" + _numLoaded + ")";
return desc;
}
/**
* 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
{
// remove source from fileinfo
if (_oldFileInfo == null) {
inTrackInfo.getFileInfo().removeSource();
}
else {
inTrackInfo.setFileInfo(_oldFileInfo);
}
// Crop / replace
if (_contents == null)
{
// crop track to previous size
inTrackInfo.getTrack().cropTo(_cropIndex);
}
else
{
// replace photos how they were
if (_photoList != null)
{
inTrackInfo.getPhotoList().restore(_photoList);
}
// replace track contents with old
if (!inTrackInfo.getTrack().replaceContents(_contents))
{
throw new UndoException(getDescription());
}
}
// clear selection
inTrackInfo.getSelection().clearAll();
}
}
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