Moved source into separate src directory due to popular request

[GpsPrune.git] / src / tim / prune / undo / UndoReverseSection.java

diff --git a/src/tim/prune/undo/UndoReverseSection.java b/src/tim/prune/undo/UndoReverseSection.java
new file mode 100644 (file)
index 0000000..dd4a24e
--- /dev/null
+++ 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);
+               }
+       }
+}