X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fundo%2FUndoReverseSection.java;fp=src%2Ftim%2Fprune%2Fundo%2FUndoReverseSection.java;h=dd4a24e7b0d1f7e67d43d983b905df89906f91d4;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/undo/UndoReverseSection.java b/src/tim/prune/undo/UndoReverseSection.java
new file mode 100644
index 0000000..dd4a24e
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+++ b/src/tim/prune/undo/UndoReverseSection.java
@@ -0,0 +1,79 @@
+package tim.prune.undo;
+
+import tim.prune.I18nManager;
+import tim.prune.data.DataPoint;
+import tim.prune.data.Track;
+import tim.prune.data.TrackInfo;
+
+/**
+ * Undo reversal of track section
+ */
+public class UndoReverseSection implements UndoOperation
+{
+	/** Start and end indices of section */
+	private int _startIndex, _endIndex;
+	/** First and last track point in section and next track point after */
+	private DataPoint _firstTrackPoint, _lastTrackPoint, _nextTrackPoint;
+	/** Segment flags for these points */
+	private boolean _firstSegmentFlag, _lastSegmentFlag, _nextSegmentFlag;
+
+
+	/**
+	 * Constructor
+	 * @param inTrack track object for copying segment flags
+	 * @param inStart start index of section
+	 * @param inEnd end index of section
+	 */
+	public UndoReverseSection(Track inTrack, int inStart, int inEnd)
+	{
+		_startIndex = inStart;
+		_endIndex = inEnd;
+		// Look for first track point in section to be reversed, store flag
+		_firstTrackPoint = inTrack.getNextTrackPoint(inStart);
+		if (_firstTrackPoint != null) {
+			_firstSegmentFlag = _firstTrackPoint.getSegmentStart();
+		}
+		// Look for last track point in section to be reversed, store flag
+		_lastTrackPoint = inTrack.getPreviousTrackPoint(inEnd);
+		if (_lastTrackPoint != null) {
+			_lastSegmentFlag = _lastTrackPoint.getSegmentStart();
+		}
+		// Look for following track point, store flag
+		_nextTrackPoint = inTrack.getNextTrackPoint(inEnd + 1);
+		if (_nextTrackPoint != null) {
+			_nextSegmentFlag = _nextTrackPoint.getSegmentStart();
+		}
+	}
+
+
+	/**
+	 * @return description of operation
+	 */
+	public String getDescription()
+	{
+		return I18nManager.getText("undo.reverse");
+	}
+
+
+	/**
+	 * 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
+	{
+		if (!inTrackInfo.getTrack().reverseRange(_startIndex, _endIndex))
+		{
+			throw new UndoException(getDescription());
+		}
+		// Restore segment start flags
+		if (_firstTrackPoint != null) {
+			_firstTrackPoint.setSegmentStart(_firstSegmentFlag);
+		}
+		if (_lastTrackPoint != null) {
+			_lastTrackPoint.setSegmentStart(_lastSegmentFlag);
+		}
+		if (_nextTrackPoint != null) {
+			_nextTrackPoint.setSegmentStart(_nextSegmentFlag);
+		}
+	}
+}