package tim.prune.undo;

import tim.prune.I18nManager;
import tim.prune.data.DataPoint;
import tim.prune.data.Track;
import tim.prune.data.TrackInfo;

/**
 * Abstract operation to undo a reordering by replacing track contents with a shallow copy
 */
public abstract class UndoReorder implements UndoOperation
{
	/** Shallow copy of whole track contents */
	private DataPoint[] _contents = null;
	/** Description */
	private String _description = null;

	/**
	 * Constructor
	 * @param inTrack track contents to copy
	 * @param inDescKey description key
	 */
	public UndoReorder(Track inTrack, String inDescKey)
	{
		_contents = inTrack.cloneContents();
		_description = I18nManager.getText(inDescKey);
	}

	/**
	 * @return description
	 */
	public String getDescription() {
		return _description;
	}


	/**
	 * 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
	{
		// restore track to previous values
		inTrackInfo.getTrack().replaceContents(_contents);
		inTrackInfo.getSelection().clearAll();
	}
}