/*
* Copyright (C) 2011 Alasdair C. Hamilton
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
package ket.treeDiff;
import java.util.Vector;
import ket.math.*;
import ket.display.box.Box;
import ket.display.Transition;
/**
* Represent the act of renaming the name of an argument specified by its
* address.
*/
public class Step {
Argument before;
Argument after;
public Step(Argument before, Argument after) {
this.before = before;
this.after = after;
}
public Transition getTransition(Box beforeRootBox, Box afterRootBox) {
Box beforeBox = beforeRootBox.findBoxByArgument(before);
Box afterBox = afterRootBox.findBoxByArgument(after);
if (beforeBox==null || afterBox==null) {
return null;
}
return new Transition(beforeBox, afterBox);
}
}