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* $Id: RtfTab.java,v 1.1 2006/06/17 09:51:30 hallm Exp $
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* Copyright 2001, 2002, 2003, 2004 by Mark Hall
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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* The Original Code is 'iText, a free JAVA-PDF library'.
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
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* Co-Developer of the code is Mark Hall. Portions created by the Co-Developer are
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* Copyright (C) 2006 by Mark Hall. All Rights Reserved
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* Contributor(s): all the names of the contributors are added in the source code
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the ?GNU LIBRARY GENERAL PUBLIC LICENSE?), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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package com.lowagie.text.rtf.text;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import com.lowagie.text.rtf.RtfAddableElement;
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* The RtfTab encapsulates a tab position and tab type in a paragraph.
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* To add tabs to a paragraph construct new RtfTab objects with the desired
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* tab position and alignment and then add them to the paragraph. In the actual
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* text the tabs are then defined as standard \t characters.<br /><br />
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* <code>RtfTab tab = new RtfTab(300, RtfTab.TAB_LEFT_ALIGN);<br />
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* Paragraph para = new Paragraph();<br />
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* para.add(tab);<br />
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* para.add("This paragraph has a\ttab defined.");</code>
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* @version $Revision: 1.1 $
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* @author Mark Hall (mhall@edu.uni-klu.ac.at)
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public class RtfTab extends RtfAddableElement {
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* A tab where the text is left aligned.
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public static final int TAB_LEFT_ALIGN = 0;
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* A tab where the text is centre aligned.
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public static final int TAB_CENTER_ALIGN = 1;
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* A tab where the text is right aligned.
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public static final int TAB_RIGHT_ALIGN = 2;
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* A tab where the text is aligned on the decimal character. Which
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* character that is depends on the language settings of the viewer.
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public static final int TAB_DECIMAL_ALIGN = 3;
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* The tab position in twips.
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private int position = 0;
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private int type = TAB_LEFT_ALIGN;
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* Constructs a new RtfTab with the given position and type. The position
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* is in standard iText points. The type is one of the tab alignment
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* constants defined in the RtfTab.
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* @param position The position of the tab in points.
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* @param type The tab type constant.
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public RtfTab(float position, int type) {
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this.position = (int) Math.round(position * TWIPS_FACTOR);
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case TAB_LEFT_ALIGN: this.type = TAB_LEFT_ALIGN; break;
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case TAB_CENTER_ALIGN: this.type = TAB_CENTER_ALIGN; break;
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case TAB_RIGHT_ALIGN: this.type = TAB_RIGHT_ALIGN; break;
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case TAB_DECIMAL_ALIGN: this.type = TAB_DECIMAL_ALIGN; break;
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default: this.type = TAB_LEFT_ALIGN; break;
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* Writes the tab settings.
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public byte[] write() {
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ByteArrayOutputStream result = new ByteArrayOutputStream();
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case TAB_CENTER_ALIGN: result.write("\\tqc".getBytes()); break;
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case TAB_RIGHT_ALIGN: result.write("\\tqr".getBytes()); break;
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case TAB_DECIMAL_ALIGN: result.write("\\tqdec".getBytes()); break;
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result.write("\\tx".getBytes());
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result.write(intToByteArray(this.position));
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} catch(IOException ioe) {
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ioe.printStackTrace();
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return result.toByteArray();