X-Git-Url: https://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fundo%2FUndoStack.java;fp=tim%2Fprune%2Fundo%2FUndoStack.java;h=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hp=d3e85e02e3f5d078eb49ac612e084528d34eae1c;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465;p=GpsPrune.git

diff --git a/tim/prune/undo/UndoStack.java b/tim/prune/undo/UndoStack.java
deleted file mode 100644
index d3e85e0..0000000
--- a/tim/prune/undo/UndoStack.java
+++ /dev/null
@@ -1,62 +0,0 @@
-package tim.prune.undo;
-
-import java.util.Stack;
-
-/**
- * Class to hold an undo operation together with a counter
- */
-class UndoOpWithState
-{
-	public UndoOperation _undoOperation = null;
-	public int           _undoCounter = 0;
-	/** Constructor */
-	public UndoOpWithState(UndoOperation inOp, int inCounter)
-	{
-		_undoOperation = inOp;
-		_undoCounter   = inCounter;
-	}
-}
-
-/**
- * Stack of undo operations
- * which also remembers how many undos have been performed
- */
-public class UndoStack extends Stack<UndoOpWithState>
-{
-	/** Number of undos (and clears) already performed */
-	private int _numUndos = 0;
-
-	@Override
-	public void clear()
-	{
-		_numUndos++;
-		super.clear();
-	}
-
-	/** Add an undo operation to the stack */
-	public synchronized boolean add(UndoOperation inOp)
-	{
-		return super.add(new UndoOpWithState(inOp, _numUndos));
-	}
-
-	/** Pop the latest operation from the stack */
-	public synchronized UndoOperation popOperation()
-	{
-		_numUndos++;
-		return super.pop()._undoOperation;
-	}
-
-	/** Get the operation at the given index */
-	public UndoOperation getOperationAt(int inIndex)
-	{
-		return super.elementAt(inIndex)._undoOperation;
-	}
-
-	/** @return number of undos */
-	public int getNumUndos()
-	{
-		if (isEmpty()) {return 0;}
-		// Get the number of undos stored by the last operation on the stack
-		return peek()._undoCounter;
-	}
-}