X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fload%2FTrackNameList.java;fp=src%2Ftim%2Fprune%2Fload%2FTrackNameList.java;h=2f2b7dcf6a3d31cc3ef4e7415a125ad769e143a1;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/load/TrackNameList.java b/src/tim/prune/load/TrackNameList.java
new file mode 100644
index 0000000..2f2b7dc
--- /dev/null
+++ b/src/tim/prune/load/TrackNameList.java
@@ -0,0 +1,83 @@
+package tim.prune.load;
+
+import java.util.ArrayList;
+
+/**
+ * Class to hold and manage a list of track names
+ * from a gpx file, and report back which points
+ * belong to which track
+ */
+public class TrackNameList
+{
+	/** Current point number */
+	private int _pointNum = -1;
+	/** Current track number */
+	private int _trackNum = -1;
+	/** List of unique track names */
+	private ArrayList<String> _trackNames = new ArrayList<String>();
+	/** List of point numbers at the start of each track */
+	private ArrayList<Integer> _startIndices = new ArrayList<Integer>();
+
+
+	/**
+	 * Inform list of a new point
+	 * @param inTrackNum number of track, starting at zero
+	 * @param inTrackName name of track, if any
+	 * @param inIsTrackpoint true if point is a trackpoint
+	 */
+	public void addPoint(int inTrackNum, String inTrackName, boolean inIsTrackpoint)
+	{
+		_pointNum++;
+		if (inIsTrackpoint)
+		{
+			if (inTrackNum != _trackNum) {
+				_trackNames.add(inTrackName);
+				_startIndices.add(Integer.valueOf(_pointNum));
+			}
+		}
+		_trackNum = inTrackNum;
+	}
+
+	/**
+	 * @return number of tracks found in file
+	 */
+	public int getNumTracks()
+	{
+		return _trackNames.size();
+	}
+
+	/**
+	 * @param inTrackNum index of track, starting from zero
+	 * @return name of specified track (or null if none given)
+	 */
+	public String getTrackName(int inTrackNum)
+	{
+		if (inTrackNum < 0 || inTrackNum >= getNumTracks()) {return "";}
+		String name = _trackNames.get(inTrackNum);
+		return name;
+	}
+
+	/**
+	 * @param inTrackNum index of track, starting from zero
+	 * @return number of points in the specified track
+	 */
+	public int getNumPointsInTrack(int inTrackNum)
+	{
+		if (inTrackNum < 0 || inTrackNum >= getNumTracks()) {return 0;}
+		if (inTrackNum == (getNumTracks()-1)) {
+			// last track, use total points
+			return _pointNum - _startIndices.get(inTrackNum) + 1;
+		}
+		return _startIndices.get(inTrackNum+1) - _startIndices.get(inTrackNum);
+	}
+
+	/**
+	 * @param inTrackNum index of track, starting from zero
+	 * @return start index of the specified track
+	 */
+	public int getStartIndex(int inTrackNum)
+	{
+		if (inTrackNum < 0 || inTrackNum >= getNumTracks()) {return 0;}
+		return _startIndices.get(inTrackNum);
+	}
+}