MenuEntries.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.textedit.scripteditor;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import net.sf.gridarta.utils.IOUtils;
import org.apache.log4j.Category;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;

public class MenuEntries implements Iterable<String>, Serializable {

    private static final long serialVersionUID = 1L;

    @NotNull
    private static final String PYTHON_MENU_FILE = "/cfpython_menu.def";

    @NotNull
    private static final Category LOG = Logger.getLogger(MenuEntries.class);

    @NotNull
    private final List<String> menuEntries = new ArrayList<>();

    public MenuEntries() {
        try {
            final InputStream inputStream = CFPythonPopup.class.getResourceAsStream(PYTHON_MENU_FILE);
            if (inputStream == null) {
                LOG.error("Resource '" + PYTHON_MENU_FILE + "' not found");
                return;
            }
            try {
                try (Reader reader = new InputStreamReader(inputStream, IOUtils.MAP_ENCODING)) {
                    try (BufferedReader bufferedReader = new BufferedReader(reader)) {
                        // read file into the cmdList vector:
                        while (true) {
                            final String inputLine = bufferedReader.readLine();
                            if (inputLine == null) {
                                break;
                            }
                            final String line = inputLine.trim();
                            if (!line.isEmpty() && !line.startsWith("#")) {
                                // ATM, the descriptive info about method headers is cut out
                                // (TODO: parse and show the full info in a status bar)
                                final int k = line.indexOf('(');
                                if (k > 0) {
                                    menuEntries.add(line.substring(0, k) + "()");
                                } else {
                                    LOG.error("Parse error in " + PYTHON_MENU_FILE + ":");
                                    LOG.error("   \"" + line + "\" missing '()'");
                                    menuEntries.add(line + "()"); // that line is probably garbage, but will work
                                }
                            }
                        }
                        menuEntries.sort(String.CASE_INSENSITIVE_ORDER);
                    }
                }
            } finally {
                inputStream.close();
            }
        } catch (final UnsupportedEncodingException ex) {
            LOG.error("Cannot decode file '" + PYTHON_MENU_FILE + "': " + ex.getMessage());
        } catch (final IOException ex) {
            LOG.error("Cannot read file '" + PYTHON_MENU_FILE + "': " + ex.getMessage());
        }
    }

    @NotNull
    @Override
    public Iterator<String> iterator() {
        return Collections.unmodifiableCollection(menuEntries).iterator();
    }

    public boolean isEmpty() {
        return menuEntries.isEmpty();
    }

}