MoveSquarePrevAction.java

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/*
 * Gridarta MMORPG map editor for Crossfire, Daimonin and similar games.
 * Copyright (C) 2000-2015 The Gridarta Developers.
 *
 * 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 2 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package net.sf.gridarta.action;

import net.sf.gridarta.gui.panel.selectedsquare.SelectedSquareModel;
import net.sf.gridarta.model.archetype.Archetype;
import net.sf.gridarta.model.gameobject.GameObject;
import net.sf.gridarta.model.maparchobject.MapArchObject;
import net.sf.gridarta.model.mapmanager.MapManager;
import net.sf.japi.swing.action.ActionMethod;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class MoveSquarePrevAction<G extends GameObject<G, A, R>, A extends MapArchObject<A>, R extends Archetype<G, A, R>> extends AbstractMoveSquareAction<G, A, R> {

    @NotNull
    private final SelectedSquareModel<G, A, R> selectedSquareModel;

    public MoveSquarePrevAction(@NotNull final SelectedSquareModel<G, A, R> selectedSquareModel, @Nullable final MapManager<G, A, R> mapManager) {
        super(selectedSquareModel, mapManager);
        this.selectedSquareModel = selectedSquareModel;
    }

    @ActionMethod
    public void moveSquarePrev() {
        doAction(true);
    }

    @Override
    protected boolean doAction(final boolean performAction, @Nullable final G gameObject) {
        if (gameObject == null || !gameObject.isHead()) {
            return false;
        }

        G prevGameObject = gameObject.getPrev();
        if (prevGameObject == null) {
            prevGameObject = gameObject.getContainerGameObject();
            if (prevGameObject == null) {
                return false;
            }
        } else if (performAction) {
            while (true) {
                final G tmp = prevGameObject.getFirst();
                if (tmp == null) {
                    break;
                }
                prevGameObject = tmp;
            }
        }

        if (performAction) {
            selectedSquareModel.setSelectedGameObject(prevGameObject);
        }

        return true;
    }

}