/*
* This file is part of Skript.
*
* Skript 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.
*
* Skript 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 Skript. If not, see <http://www.gnu.org/licenses/>.
*
*
* Copyright 2011-2014 Peter Güttinger
*
*/
package ch.njol.skript.expressions;
import org.bukkit.Location;
import org.bukkit.event.Event;
import org.eclipse.jdt.annotation.Nullable;
import ch.njol.skript.Skript;
import ch.njol.skript.doc.Description;
import ch.njol.skript.doc.Examples;
import ch.njol.skript.doc.Name;
import ch.njol.skript.doc.Since;
import ch.njol.skript.lang.Expression;
import ch.njol.skript.lang.ExpressionType;
import ch.njol.skript.lang.SkriptParser.ParseResult;
import ch.njol.skript.lang.util.SimpleExpression;
import ch.njol.util.Kleenean;
/**
* @author Peter Güttinger
*/
@Name("Distance")
@Description("The distance between two points.")
@Examples({"distance between the player and {%player%.home} is smaller than 20:",
" message \"You're very close to your home!\""})
@Since("1.0")
public class ExprDistance extends SimpleExpression<Double> {
static {
Skript.registerExpression(ExprDistance.class, Double.class, ExpressionType.COMBINED, "[the] distance between %location% and %location%");
}
@SuppressWarnings("null")
private Expression<Location> loc1, loc2;
@SuppressWarnings({"unchecked", "null"})
@Override
public boolean init(final Expression<?>[] vars, final int matchedPattern, final Kleenean isDelayed, final ParseResult parseResult) {
loc1 = (Expression<Location>) vars[0];
loc2 = (Expression<Location>) vars[1];
return true;
}
@Override
@Nullable
protected Double[] get(final Event e) {
final Location l1 = loc1.getSingle(e), l2 = loc2.getSingle(e);
if (l1 == null || l2 == null || l1.getWorld() != l2.getWorld())
return new Double[0];
return new Double[] {l1.distance(l2)};
}
@Override
public String toString(final @Nullable Event e, final boolean debug) {
return "distance between " + loc1.toString(e, debug) + " and " + loc2.toString(e, debug);
}
@Override
public boolean isSingle() {
return true;
}
@Override
public Class<? extends Double> getReturnType() {
return Double.class;
}
}