/*
GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org
This file is part of GeoGebra.
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.
*/
package org.geogebra.common.kernel.algos;
import java.util.ArrayList;
import org.geogebra.common.kernel.Construction;
import org.geogebra.common.kernel.commands.Commands;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoList;
/**
* Remove undefined objects from a list
*
* @author Michael Borcherds
* @version 2008-03-04
*/
public class AlgoRemove extends AlgoElement {
private GeoList inputList, inputList2; // input
private GeoList outputList; // output
private int size;
/**
* Creates new undefined removal algo
*
* @param cons
* @param label
* @param inputList
*/
public AlgoRemove(Construction cons, String label, GeoList inputList,
GeoList inputList2) {
super(cons);
this.inputList = inputList;
this.inputList2 = inputList2;
outputList = new GeoList(cons);
setInputOutput();
compute();
outputList.setLabel(label);
}
@Override
public Commands getClassName() {
return Commands.Remove;
}
@Override
protected void setInputOutput() {
// make sure that x(Element[list,1]) will work even if the output list's
// length is zero
outputList.setTypeStringForXML(inputList.getTypeStringForXML());
input = new GeoElement[2];
input[0] = inputList;
input[1] = inputList2;
setOutputLength(1);
setOutput(0, outputList);
setDependencies(); // done by AlgoElement
}
/**
* Returns the pruned list
*
* @return pruned list
*/
public GeoList getResult() {
return outputList;
}
private ArrayList<GeoElement> geosToRemove = new ArrayList<GeoElement>();
@Override
public final void compute() {
size = inputList.size();
if (!inputList.isDefined()) {
outputList.setUndefined();
return;
}
outputList.setDefined(true);
outputList.clear();
if (size == 0) {
return;
}
geosToRemove.clear();
int undefinedToRemove = 0;
for (int i = 0; i < inputList2.size(); i++) {
GeoElement geo = inputList2.get(i);
if (AlgoRemoveUndefined.isDefined(geo)) {
geosToRemove.add(geo);
} else {
undefinedToRemove++;
}
}
for (int i = 0; i < size; i++) {
GeoElement geo = inputList.get(i);
boolean lookFor = true;
if (undefinedToRemove > 0 && !AlgoRemoveUndefined.isDefined(geo)) {
undefinedToRemove--;
lookFor = false;
}
for (int j = 0; j < geosToRemove.size() && lookFor; j++) {
if (geo.isEqual(geosToRemove.get(j))) {
geosToRemove.remove(j);
lookFor = false;
}
}
if (lookFor) {
outputList.add(geo.copyInternal(cons));
}
}
}
}