Version 1, September 2006

[GpsPrune.git] / tim / prune / undo / UndoLoad.java

diff --git a/tim/prune/undo/UndoLoad.java b/tim/prune/undo/UndoLoad.java
new file mode 100644 (file)
index 0000000..8bf2218
--- /dev/null
+++ b/tim/prune/undo/UndoLoad.java
@@ -0,0 +1,88 @@
+package tim.prune.undo;\r
+\r
+import tim.prune.I18nManager;\r
+import tim.prune.data.DataPoint;\r
+import tim.prune.data.TrackInfo;\r
+\r
+/**\r
+ * Operation to undo a load operation\r
+ */\r
+public class UndoLoad implements UndoOperation\r
+{\r
+       private int _cropIndex = -1;\r
+       private int _numLoaded = -1;\r
+       private DataPoint[] _contents = null;\r
+       private String _previousFilename = null;\r
+\r
+\r
+       /**\r
+        * Constructor for appending\r
+        * @param inIndex index number of crop point\r
+        * @param inNumLoaded number of points loaded\r
+        */\r
+       public UndoLoad(int inIndex, int inNumLoaded)\r
+       {\r
+               _cropIndex = inIndex;\r
+               _numLoaded = inNumLoaded;\r
+               _contents = null;\r
+               _previousFilename = null;\r
+       }\r
+\r
+\r
+       /**\r
+        * Constructor for replacing\r
+        * @param inOldTrack track being replaced\r
+        * @param inNumLoaded number of points loaded\r
+        */\r
+       public UndoLoad(TrackInfo inOldTrackInfo, int inNumLoaded)\r
+       {\r
+               _cropIndex = -1;\r
+               _numLoaded = inNumLoaded;\r
+               _contents = inOldTrackInfo.getTrack().cloneContents();\r
+               if (inOldTrackInfo.getFileInfo().getNumFiles() == 1)\r
+                       _previousFilename = inOldTrackInfo.getFileInfo().getFilename();\r
+       }\r
+\r
+\r
+       /**\r
+        * @return description of operation including number of points loaded\r
+        */\r
+       public String getDescription()\r
+       {\r
+               String desc = I18nManager.getText("undo.load");\r
+               if (_numLoaded > 0)\r
+                       desc = desc + " (" + _numLoaded + ")";\r
+               return desc;\r
+       }\r
+\r
+\r
+       /**\r
+        * Perform the undo operation on the given Track\r
+        * @param inTrackInfo TrackInfo object on which to perform the operation\r
+        */\r
+       public void performUndo(TrackInfo inTrackInfo) throws UndoException\r
+       {\r
+               // remove file from fileinfo\r
+               inTrackInfo.getFileInfo().removeFile();\r
+               if (_previousFilename != null)\r
+               {\r
+                       inTrackInfo.getFileInfo().setFile(_previousFilename);\r
+               }\r
+               // Crop / replace\r
+               if (_contents == null)\r
+               {\r
+                       // crop track to previous size\r
+                       inTrackInfo.getTrack().cropTo(_cropIndex);\r
+               }\r
+               else\r
+               {\r
+                       // replace track contents with old\r
+                       if (!inTrackInfo.getTrack().replaceContents(_contents))\r
+                       {\r
+                               throw new UndoException(getDescription());\r
+                       }\r
+               }\r
+               // clear selection\r
+               inTrackInfo.getSelection().clearAll();\r
+       }\r
+}
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