Package com.lowagie.text.rtf.field

Source Code of com.lowagie.text.rtf.field.RtfTOCEntry

/*
* $Id$
*
* Copyright 2004 by Mark Hall
* Uses code Copyright 2002
*   Steffen.Stundzig (Steffen.Stundzig@smb-tec.com)
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the ?GNU LIBRARY GENERAL PUBLIC LICENSE?), in which case the
* provisions of LGPL are applicable instead of those above.  If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/

package com.lowagie.text.rtf.field;

import java.io.IOException;
import java.io.OutputStream;

import com.lowagie.text.DocWriter;
import com.lowagie.text.LwgFont;


/**
* The RtfTOCEntry is used together with the RtfTableOfContents to generate a table of
* contents. Add the RtfTOCEntry in those locations in the document where table of
* contents entries should link to
*
* @version $Id$
* @author Mark Hall (Mark.Hall@mail.room3b.eu)
* @author Steffen.Stundzig (Steffen.Stundzig@smb-tec.com)
* @author Thomas Bickel (tmb99@inode.at)
*/
public class RtfTOCEntry extends RtfField {

    /**
     * Constant for the beginning of hidden text
     */
    private static final byte[] TEXT_HIDDEN_ON = DocWriter.getISOBytes("\\v");
    /**
     * Constant for the end of hidden text
     */
    private static final byte[] TEXT_HIDDEN_OFF = DocWriter.getISOBytes("\\v0");
    /**
     * Constant for a TOC entry with page numbers
     */
    private static final byte[] TOC_ENTRY_PAGE_NUMBER = DocWriter.getISOBytes("\\tc");
    /**
     * Constant for a TOC entry without page numbers
     */
    private static final byte[] TOC_ENTRY_NO_PAGE_NUMBER = DocWriter.getISOBytes("\\tcn");
   
    /**
     * The entry text of this RtfTOCEntry
     */
    private String entry = "";
    /**
     * Whether to show page numbers in the table of contents
     */
    private boolean showPageNumber = true;
   
    /**
     * Constructs a RtfTOCEntry with a certain entry text.
     *
     * @param entry The entry text to display
     */
    public RtfTOCEntry(String entry) {
        super(null, new LwgFont());
        if(entry != null) {
            this.entry = entry;
        }
    }
   
    /**
     * Writes the content of the <code>RtfTOCEntry</code>.
     *
     * @param result The <code>OutputStream</code> to write to.
     * @throws IOException on i/o errors.
     */
    public void writeContent(final OutputStream result) throws IOException
    {     
        result.write(TEXT_HIDDEN_ON);
        result.write(OPEN_GROUP);
        if(this.showPageNumber) {
            result.write(TOC_ENTRY_PAGE_NUMBER);
        } else {
            result.write(TOC_ENTRY_NO_PAGE_NUMBER);
        }
        result.write(DELIMITER);
        this.document.filterSpecialChar(result, this.entry, true, false);
        result.write(CLOSE_GROUP);
        result.write(TEXT_HIDDEN_OFF);
    }
   
    /**
     * Sets whether to display a page number in the table of contents, or not
     *
     * @param showPageNumber Whether to display a page number or not
     */
    public void setShowPageNumber(boolean showPageNumber) {
        this.showPageNumber = showPageNumber;
    }
   
    /**
     * unused
     */
    protected void writeFieldInstContent(OutputStream out) throws IOException
    {
    }

    /**
     * unused
     */
    protected void writeFieldResultContent(OutputStream out) throws IOException
    {
    }

}
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