UndoStack.java

package com.bladecoder.engineeditor.undo;

import java.util.ArrayDeque;
import java.util.Deque;

import com.bladecoder.engineeditor.common.EditorLogger;

public class UndoStack {
	Deque<UndoOp> stack = new ArrayDeque<UndoOp>();

	public void add(UndoOp op) {
		stack.push(op);
	}

	public void undo() {
		if (!stack.isEmpty()) {
			UndoOp op = stack.pop();
			op.undo();
			
			EditorLogger.debug("UNDO: " + op);
		}
	}

	public void clear() {
		stack.clear();
	}
}