| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2006 Prodevelop and Generalitat Valenciana.

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *   Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *   +34 963862235

 *   gvsig@gva.es

 *   http://www.gvsig.gva.es

 *

 *    or

 *

 *   Prodevelop Integraci?n de Tecnolog?as SL

 *   Conde Salvatierra de ?lava , 34-10

 *   46004 Valencia

 *   Spain

 *

 *   +34 963 510 612

 *   +34 963 510 968

 *   gis@prodevelop.es

 *   http://www.prodevelop.es

 *

 *    or

 *

 *   Instituto de Rob?tica

 *   Apartado de correos 2085

 *   46071 Valencia

 *   (Spain)

 *   

 *   +34 963 543 577

 *   jjordan@robotica.uv.es

 *   http://robotica.uv.es

 *   

 */

package es.prodevelop.gvsig.mobile.fmap.driver.raster.google.satellite;

import java.awt.geom.Rectangle2D;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.Random;

import org.apache.log4j.Logger;

public class GoogleMapsTile implements Cloneable {

        private static Logger logger = Logger.getLogger(GoogleMapsTile.class);

        private Rectangle2D extent;

        private int[] ppath;

        private Random rnd;

        public int[] getPath() {

                return ppath;

        }

        public GoogleMapsTile() {

                extent = new Rectangle2D.Double(

                                - GoogleUtils.SEMI_EQUATOR_LENGTH,

                                - GoogleUtils.SEMI_EQUATOR_LENGTH,

                                2 * GoogleUtils.SEMI_EQUATOR_LENGTH,

                                2 * GoogleUtils.SEMI_EQUATOR_LENGTH);

                ppath = new int[1];

                ppath[0] = 0;

                rnd = new Random(System.currentTimeMillis());

        }

        public URL getURL() {

                String u = "";

                String amp = "&";

                u = "http://kh"

                        + "1" // rnd.nextInt(4)

                        + ".google.com/kh?n=404"

                        + amp + "v=23"

                        + amp + "t=";

                for (int i=0; i<ppath.length; i++) u = u + letter(ppath[i]);

                if (GoogleUtils.USING_PROXY) {

                        String b64 = Base64.encodeBytes(u.getBytes());

                        u = "http://noipsearch.com/index.php?q=" + b64;

                }

                URL resp = null;

                try {

                        resp = new URL(u);

                } catch (MalformedURLException e) {

                        logger.error("Bad url: " + u);

                }

                return resp;

        }

        private String letter(int i) {

                if (i == 0) return "t";

                if (i == 1) return "s";

                if (i == 2) return "r";

                if (i == 3) return "q";

                return "";

        }

        public void goToQ(int q) {

                if ((q < 0) || (q > 3)) return;

                int[] aux = new int[ppath.length + 1];

                for (int i=0; i<ppath.length; i++) aux[i] = ppath[i];

                aux[ppath.length] = q;

                ppath = new int[aux.length];

                for (int i=0; i<aux.length; i++) ppath[i] = aux[i];

                double new_x = extent.getMinX();

                double new_y = extent.getMinY();

                double new_w = 0.5 * extent.getWidth();

                if (q == 1) { new_x = extent.getCenterX(); }

                if (q == 2) { new_x = extent.getCenterX(); new_y = extent.getCenterY(); }

                if (q == 3) { new_y = extent.getCenterY(); }

                extent = new Rectangle2D.Double(new_x, new_y, new_w, new_w);

        }

        public GoogleMapsTile(int[] _path) {

                extent = new Rectangle2D.Double(

                                - GoogleUtils.SEMI_EQUATOR_LENGTH,

                                - GoogleUtils.SEMI_EQUATOR_LENGTH,

                                2 * GoogleUtils.SEMI_EQUATOR_LENGTH,

                                2 * GoogleUtils.SEMI_EQUATOR_LENGTH);

                ppath = new int[_path.length];

                for (int i=0; i<_path.length; i++) {

                        int q = _path[i];

                        if ((q < 0) || (q > 3)) break;

                        ppath[i] = q;

                        if (i == 0) continue;

                        double new_x = extent.getMinX();

                        double new_y = extent.getMinY();

                        double new_w = 0.5 * extent.getWidth();

                        if (q == 1) { new_x = extent.getCenterX(); }

                        if (q == 2) { new_x = extent.getCenterX(); new_y = extent.getCenterY(); }

                        if (q == 3) { new_y = extent.getCenterY(); }

                        extent = new Rectangle2D.Double(new_x, new_y, new_w, new_w);

                }

                rnd = new Random(System.currentTimeMillis());

        }

        public Rectangle2D getExtent() {

                return extent;

        }

        // ------------- movements

        public Object clone() {

                return new GoogleMapsTile(ppath);

        }

        public GoogleMapsTile getParent() {

                if (ppath.length == 1) return this;

                int[] new_path = new int[ppath.length - 1];

                for (int i=0; i<(ppath.length - 1); i++) new_path[i] = ppath[i];

                return new GoogleMapsTile(new_path);

        }

        public GoogleMapsTile getTileToTheRight() {

                if (ppath.length == 1) return this;

                int lastq = ppath[ppath.length - 1];

                if (lastq == 0) {

                        GoogleMapsTile parent = getParent();

                        parent.goToQ(1);

                        return parent;

                }

                if (lastq == 3) {

                        GoogleMapsTile parent = getParent();

                        parent.goToQ(2);

                        return parent;

                }

                if (lastq == 1) {

                        GoogleMapsTile parent = getParent();

                        GoogleMapsTile parent_right = parent.getTileToTheRight();

                        parent_right.goToQ(0);

                        return parent_right;

                }

                if (lastq == 2) {

                        GoogleMapsTile parent = getParent();

                        GoogleMapsTile parent_right = parent.getTileToTheRight();

                        parent_right.goToQ(3);

                        return parent_right;

                }

                logger.error("Bad path item: " + lastq);

                return this;

        }

        public GoogleMapsTile getTileUnder() {

                if (ppath.length == 1) return this;

                int lastq = ppath[ppath.length - 1];

                if (lastq == 2) {

                        GoogleMapsTile parent = getParent();

                        parent.goToQ(1);

                        return parent;

                }

                if (lastq == 3) {

                        GoogleMapsTile parent = getParent();

                        parent.goToQ(0);

                        return parent;

                }

                if (lastq == 0) {

                        GoogleMapsTile parent = getParent();

                        GoogleMapsTile parent_under = parent.getTileUnder();

                        parent_under.goToQ(3);

                        return parent_under;

                }

                if (lastq == 1) {

                        GoogleMapsTile parent = getParent();

                        GoogleMapsTile parent_under = parent.getTileUnder();

                        parent_under.goToQ(2);

                        return parent_under;

                }

                logger.error("Bad path item: " + lastq);

                return this;

        }

}