/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id$ */

package org.apache.fop.render.rtf.rtflib.rtfdoc;

/*
 * This file is part of the RTF library of the FOP project, which was originally
 * created by Bertrand Delacretaz <bdelacretaz@codeconsult.ch> and by other
 * contributors to the jfor project (www.jfor.org), who agreed to donate jfor to
 * the FOP project.
 */

import java.io.IOException;
import java.io.Writer;
import java.util.Random;

/**
 * <p>Model of an RTF list, which can contain RTF list items.</p>
 *
 * <p>This work was authored by Bertrand Delacretaz (bdelacretaz@codeconsult.ch),
 * Christopher Scott (scottc@westinghouse.com), and
 * Peter Herweg (pherweg@web.de).</p>
 */
public class RtfList extends RtfContainer {
    private RtfListItem item;
    private RtfListTable listTable;
    private final boolean hasTableParent;
    private RtfListStyle defaultListStyle;
    private Integer listTemplateId;
    private Integer listId;
    private static Random listIdGenerator = new Random(0);

    /** Create an RTF list as a child of given container with given attributes */
    RtfList(RtfContainer parent, Writer w, RtfAttributes attr) throws IOException {
        super(parent, w, attr);

        //random number generator for ids
        listId = listIdGenerator.nextInt();
        listTemplateId = listIdGenerator.nextInt();

        //create a new list table entry for the list
        listTable = getRtfFile().startListTable(attr);
        listTable.addList(this);

        // find out if we are nested in a table
        hasTableParent = this.getParentOfClass(RtfTable.class) != null;

        this.setRtfListStyle(new RtfListStyleBullet());
    }

    /**
     * Close current list item and start a new one
     * @return new RtfListItem
     * @throws IOException for I/O problems
     */
    public RtfListItem newListItem() throws IOException {
        if (item != null) {
            item.close();
        }
        item = new RtfListItem(this, writer);
        return item;
    }

    /**
     * Returns the Id of the list.
     * @return Id of the list
     */
    public Integer getListId() {
        return listId;
    }

    /**
     * Returns the Id of the list template.
     * @return Id of the list template
     */
    public Integer getListTemplateId() {
        return listTemplateId;
    }

    /**
     * Change list style
     * @param ls ListStyle to set
     */
    public void setRtfListStyle(RtfListStyle ls) {
        defaultListStyle = ls;
    }

    /**
     * Get list style
     * @return ListSytle of the List
     */
    public RtfListStyle getRtfListStyle() {
        return defaultListStyle;
    }

    /**
     * Returns true, if the list has a parent table.
     * @return true, if the list has a parent table
     */
    public boolean getHasTableParent() {
        return hasTableParent;
    }
}