Subversion Repositories mkgmap

/*
 * Copyright (C) 2011.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 or
 * version 2 as published by the Free Software Foundation.
 *
 * 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.
 */
package uk.me.parabola.imgfmt.app.mdr;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import uk.me.parabola.imgfmt.app.ImgFileWriter;
import uk.me.parabola.imgfmt.app.srt.Sort;
import uk.me.parabola.imgfmt.app.srt.SortKey;

/**
 * Regions sorted by name. Same number of records as mdr13.
 *
 * @author Steve Ratcliffe
 */
public class Mdr23 extends MdrSection {
        private final List<Mdr13Record> regions = new ArrayList<Mdr13Record>();

        public Mdr23(MdrConfig config) {
                setConfig(config);
        }

        /**
         * Takes the region list and sorts it according to the name.
         * @param list Original region list.
         */
        public void sortRegions(List<Mdr13Record> list) {
                Sort sort = getConfig().getSort();
                List<SortKey<Mdr13Record>> keys = MdrUtils.sortList(sort, list);
                Collections.sort(keys);

                String lastName = null;
                int lastMapIndex = 0;
                int record = 0;
                for (SortKey<Mdr13Record> key : keys) {
                        Mdr13Record reg = key.getObject();

                        // Only add if different name or map
                        String name = reg.getName();
                        if (reg.getMapIndex() != lastMapIndex || !name.equals(lastName)) {
                                record++;
                                reg.getMdr28().setMdr23(record);
                                regions.add(reg);

                                lastName = name;
                                lastMapIndex = reg.getMapIndex();
                        }
                }
        }

        /**
         * Write out the contents of this section.
         *
         * @param writer Where to write it.
         */
        public void writeSectData(ImgFileWriter writer) {
                String lastName = null;
                for (Mdr13Record reg : regions) {
                        putMapIndex(writer, reg.getMapIndex());

                        int flag = 0;
                        String name = reg.getName();
                        if (!name.equals(lastName)) {
                                flag = 0x800000;
                                lastName = name;
                        }

                        writer.putChar((char) reg.getRegionIndex());
                        writer.putChar((char) reg.getCountryIndex());
                        writer.put3(reg.getLblOffset() | flag);
                }
        }

        /**
         * There is a map index followed by file region and country indexes.
         * Then there is a label offset for the name, which strangely appears
         * to be three bytes always, although that many would rarely (or never?) be
         * required.
         */
        public int getItemSize() {
                PointerSizes sizes = getSizes();
                return sizes.getMapSize() + 2 + 2 + 3;
        }

        /**
         * The number of records in this section.
         *
         * @return The number of items in the section.
         */
        protected int numberOfItems() {
                return regions.size();
        }
}