X-Git-Url: https://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fundo%2FUndoLoad.java;fp=tim%2Fprune%2Fundo%2FUndoLoad.java;h=8bf22183c5162c787fa8c7350f602a1da2c5f4df;hb=312fec956e43f5d0a38617da5d0add9c62563e2c;hp=0000000000000000000000000000000000000000;hpb=db1c1602b89209f4c92e8bd12ad38cd243fb27c7;p=GpsPrune.git

diff --git a/tim/prune/undo/UndoLoad.java b/tim/prune/undo/UndoLoad.java
new file mode 100644
index 0000000..8bf2218
--- /dev/null
+++ b/tim/prune/undo/UndoLoad.java
@@ -0,0 +1,88 @@
+package tim.prune.undo;
+
+import tim.prune.I18nManager;
+import tim.prune.data.DataPoint;
+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 String _previousFilename = 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;
+		_previousFilename = null;
+	}
+
+
+	/**
+	 * Constructor for replacing
+	 * @param inOldTrack track being replaced
+	 * @param inNumLoaded number of points loaded
+	 */
+	public UndoLoad(TrackInfo inOldTrackInfo, int inNumLoaded)
+	{
+		_cropIndex = -1;
+		_numLoaded = inNumLoaded;
+		_contents = inOldTrackInfo.getTrack().cloneContents();
+		if (inOldTrackInfo.getFileInfo().getNumFiles() == 1)
+			_previousFilename = inOldTrackInfo.getFileInfo().getFilename();
+	}
+
+
+	/**
+	 * @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 file from fileinfo
+		inTrackInfo.getFileInfo().removeFile();
+		if (_previousFilename != null)
+		{
+			inTrackInfo.getFileInfo().setFile(_previousFilename);
+		}
+		// Crop / replace
+		if (_contents == null)
+		{
+			// crop track to previous size
+			inTrackInfo.getTrack().cropTo(_cropIndex);
+		}
+		else
+		{
+			// replace track contents with old
+			if (!inTrackInfo.getTrack().replaceContents(_contents))
+			{
+				throw new UndoException(getDescription());
+			}
+		}
+		// clear selection
+		inTrackInfo.getSelection().clearAll();
+	}
+}
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