/*
 * $Id$
 * ============================================================================
 *                    The Apache Software License, Version 1.1
 * ============================================================================
 *
 * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. The end-user documentation included with the redistribution, if any, must
 *    include the following acknowledgment: "This product includes software
 *    developed by the Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself, if
 *    and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "FOP" and "Apache Software Foundation" must not be used to
 *    endorse or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache", nor may
 *    "Apache" appear in their name, without prior written permission of the
 *    Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
 * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ============================================================================
 *
 * This software consists of voluntary contributions made by many individuals
 * on behalf of the Apache Software Foundation and was originally created by
 * James Tauber <jtauber@jtauber.com>. For more information on the Apache
 * Software Foundation, please see <http://www.apache.org/>.
 */

/*
 * 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.
 */

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

import java.io.Writer;
import java.io.IOException;

/**
 * Model of an RTF list, which can contain RTF list items
 * @author Bertrand Delacretaz bdelacretaz@codeconsult.ch
 * @author Christopher Scott, scottc@westinghouse.com
 */
public class RtfList extends RtfContainer {
    private RtfListItem item;
    private RtfListTable listTable;
    private final boolean hasTableParent;

    /** list numbering style.
     *  Could add more variables, for now we simply differentiate between bullets and numbering
     */
    private NumberingStyle numberingStyle;

    /**
     * Inner static class to handle numbering styles.
     */
    public static class NumberingStyle {
        private boolean isBulletedList = true;

        /**
         * accessor for isBulletedList
         * @return isBulletedList
         */
        public boolean getIsBulletedList() {
            return isBulletedList;
        }

        /**
         * set isBulletedList
         * @param isBL boolean value to set
         */
        public void setIsBulletedList(boolean isBL) {
            isBulletedList = isBL;
        }
    }

    /** Create an RTF list as a child of given container with given attributes */
    RtfList(RtfContainer parent, Writer w, RtfAttributes attr) throws IOException {
        super((RtfContainer)parent, w, attr);
        numberingStyle = new NumberingStyle();
        //create a new list table entry for the list
        listTable = (getRtfFile()).startListTable(attr);
        listTable.setParentList(this);

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

    /**
     * Change numbering style
     * @param ns NumberingSytle to set
     */
    public void setNumberingStyle(NumberingStyle ns) {
        numberingStyle = ns;
    }

    /**
     * Overridden to setup the list: start a group with appropriate attributes
     * @throws IOException for I/O problems
     */
    protected void writeRtfPrefix() throws IOException {
        // pard causes word97 (and sometimes 2000 too) to crash if the list is nested in a table
        if (!hasTableParent) {
            writeControlWord("pard");
        }

        writeOneAttribute(RtfText.LEFT_INDENT_FIRST, attrib.getValue(RtfListTable.LIST_INDENT));
        writeOneAttribute(RtfText.LEFT_INDENT_BODY, attrib.getValue(RtfText.LEFT_INDENT_BODY));

        // put the whole list in a group
        writeGroupMark(true);

        // group for list setup info
        writeGroupMark(true);

        writeStarControlWord("pn");
        //Modified by Chris Scott
        //fixes second line indentation

        if (numberingStyle.isBulletedList) {
            // bulleted list
            writeControlWord("pnlvlblt");
            writeControlWord("ilvl0");
            writeOneAttribute(RtfListTable.LIST_NUMBER,
            (listTable.getListNumber()).toString());
            writeOneAttribute("pnindent",
            attrib.getValue(RtfListTable.LIST_INDENT));
            writeControlWord("pnf1");
            writeGroupMark(true);
            writeControlWord("pndec");
            writeOneAttribute(RtfListTable.LIST_FONT_TYPE, "2");
            writeControlWord("pntxtb");
            writeControlWord("'b7");
            writeGroupMark(false);
        } else {
            // numbered list
            writeControlWord("pnlvlbody");
            writeControlWord("ilvl0");
            writeOneAttribute(RtfListTable.LIST_NUMBER,
            (numberingStyle.isBulletedList) ? "2" : "0");
            writeControlWord("pndec");
            writeOneAttribute("pnstart",
            attrib.getValue(RtfListTable.LIST_START_AT));
            writeOneAttribute("pnindent",
            attrib.getValue(RtfListTable.LIST_INDENT));
            writeControlWord("pntxta.");
        }

        writeGroupMark(false);
        writeOneAttribute(RtfListTable.LIST_NUMBER,
        (listTable.getListNumber()).toString());
    }

    /**
     * End the list group
     * @throws IOException for I/O problems
     */
    protected void writeRtfSuffix() throws IOException {
        // close group that encloses the whole list
        writeGroupMark(false);

        /* reset paragraph defaults to make sure list ends
         * but pard causes word97 (and sometimes 2000 too) to crash if the list
         * is nested in a table
         */
        if (!hasTableParent) {
            writeControlWord("pard");
        }
    }

    /**
     * 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;
    }

    /**
     * @return true if this is a bulleted list (as opposed to numbered list)
     */
    public boolean isBulletedList() {
        return numberingStyle.isBulletedList;
    }
}