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iText, a free Java-PDF library
/*
* $Id: Element.java 3672 2009-02-01 15:32:09Z blowagie $
*
* Copyright 1999, 2000, 2001, 2002 by Bruno Lowagie.
*
* 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;
import java.util.ArrayList;
/**
* Interface for a text element.
*
* Remark: I looked at the interface javax.swing.text.Element, but I decided to
* write my own text-classes for two reasons:
*
* - The javax.swing.text-classes may be very generic, I think they are
* overkill: they are to heavy for what they have to do.
*
- A lot of people using iText (formerly known as rugPdf), still use
* JDK1.1.x. I try to keep the Java2 requirements limited to the Collection
* classes (I think they're really great). However, if I use the
* javax.swing.text classes, it will become very difficult to downgrade rugPdf.
*
*
* @see Anchor
* @see Cell
* @see Chapter
* @see Chunk
* @see Header
* @see Image
* @see Jpeg
* @see List
* @see ListItem
* @see Meta
* @see Paragraph
* @see Phrase
* @see Rectangle
* @see Row
* @see Section
* @see Table
*/
public interface Element {
// static membervariables (meta information)
/** This is a possible type of Element. */
public static final int HEADER = 0;
/** This is a possible type of Element. */
public static final int TITLE = 1;
/** This is a possible type of Element. */
public static final int SUBJECT = 2;
/** This is a possible type of Element. */
public static final int KEYWORDS = 3;
/** This is a possible type of Element . */
public static final int AUTHOR = 4;
/** This is a possible type of Element . */
public static final int PRODUCER = 5;
/** This is a possible type of Element . */
public static final int CREATIONDATE = 6;
/** This is a possible type of Element . */
public static final int CREATOR = 7;
// static membervariables (content)
/** This is a possible type of Element. */
public static final int CHUNK = 10;
/** This is a possible type of Element. */
public static final int PHRASE = 11;
/** This is a possible type of Element. */
public static final int PARAGRAPH = 12;
/** This is a possible type of Element */
public static final int SECTION = 13;
/** This is a possible type of Element */
public static final int LIST = 14;
/** This is a possible type of Element */
public static final int LISTITEM = 15;
/** This is a possible type of Element */
public static final int CHAPTER = 16;
/** This is a possible type of Element */
public static final int ANCHOR = 17;
// static membervariables (tables)
/** This is a possible type of Element. */
public static final int CELL = 20;
/** This is a possible type of Element. */
public static final int ROW = 21;
/** This is a possible type of Element. */
public static final int TABLE = 22;
/** This is a possible type of Element. */
public static final int PTABLE = 23;
// static membervariables (annotations)
/** This is a possible type of Element. */
public static final int ANNOTATION = 29;
// static membervariables (geometric figures)
/** This is a possible type of Element. */
public static final int RECTANGLE = 30;
/** This is a possible type of Element. */
public static final int JPEG = 32;
/** This is a possible type of Element. */
public static final int JPEG2000 = 33;
/** This is a possible type of Element. */
public static final int IMGRAW = 34;
/** This is a possible type of Element. */
public static final int IMGTEMPLATE = 35;
/**
* This is a possible type of Element.
* @since 2.1.5
*/
public static final int JBIG2 = 36;
/** This is a possible type of Element. */
public static final int MULTI_COLUMN_TEXT = 40;
/** This is a possible type of Element. */
public static final int MARKED = 50;
/** This is a possible type of Element.
* @since 2.1.2
*/
public static final int YMARK = 55;
// static membervariables (alignment)
/**
* A possible value for paragraph alignment. This specifies that the text is
* aligned to the left indent and extra whitespace should be placed on the
* right.
*/
public static final int ALIGN_UNDEFINED = -1;
/**
* A possible value for paragraph alignment. This specifies that the text is
* aligned to the left indent and extra whitespace should be placed on the
* right.
*/
public static final int ALIGN_LEFT = 0;
/**
* A possible value for paragraph alignment. This specifies that the text is
* aligned to the center and extra whitespace should be placed equally on
* the left and right.
*/
public static final int ALIGN_CENTER = 1;
/**
* A possible value for paragraph alignment. This specifies that the text is
* aligned to the right indent and extra whitespace should be placed on the
* left.
*/
public static final int ALIGN_RIGHT = 2;
/**
* A possible value for paragraph alignment. This specifies that extra
* whitespace should be spread out through the rows of the paragraph with
* the text lined up with the left and right indent except on the last line
* which should be aligned to the left.
*/
public static final int ALIGN_JUSTIFIED = 3;
/**
* A possible value for vertical alignment.
*/
public static final int ALIGN_TOP = 4;
/**
* A possible value for vertical alignment.
*/
public static final int ALIGN_MIDDLE = 5;
/**
* A possible value for vertical alignment.
*/
public static final int ALIGN_BOTTOM = 6;
/**
* A possible value for vertical alignment.
*/
public static final int ALIGN_BASELINE = 7;
/**
* Does the same as ALIGN_JUSTIFIED but the last line is also spread out.
*/
public static final int ALIGN_JUSTIFIED_ALL = 8;
// static member variables for CCITT compression
/**
* Pure two-dimensional encoding (Group 4)
*/
public static final int CCITTG4 = 0x100;
/**
* Pure one-dimensional encoding (Group 3, 1-D)
*/
public static final int CCITTG3_1D = 0x101;
/**
* Mixed one- and two-dimensional encoding (Group 3, 2-D)
*/
public static final int CCITTG3_2D = 0x102;
/**
* A flag indicating whether 1-bits are to be interpreted as black pixels
* and 0-bits as white pixels,
*/
public static final int CCITT_BLACKIS1 = 1;
/**
* A flag indicating whether the filter expects extra 0-bits before each
* encoded line so that the line begins on a byte boundary.
*/
public static final int CCITT_ENCODEDBYTEALIGN = 2;
/**
* A flag indicating whether end-of-line bit patterns are required to be
* present in the encoding.
*/
public static final int CCITT_ENDOFLINE = 4;
/**
* A flag indicating whether the filter expects the encoded data to be
* terminated by an end-of-block pattern, overriding the Rows parameter. The
* use of this flag will set the key /EndOfBlock to false.
*/
public static final int CCITT_ENDOFBLOCK = 8;
// methods
/**
* Processes the element by adding it (or the different parts) to an
* ElementListener.
*
* @param listener
* an ElementListener
* @return true if the element was processed successfully
*/
public boolean process(ElementListener listener);
/**
* Gets the type of the text element.
*
* @return a type
*/
public int type();
/**
* Checks if this element is a content object.
* If not, it's a metadata object.
* @since iText 2.0.8
* @return true if this is a 'content' element; false if this is a 'metadata' element
*/
public boolean isContent();
/**
* Checks if this element is nestable.
* @since iText 2.0.8
* @return true if this element can be nested inside other elements.
*/
public boolean isNestable();
/**
* Gets all the chunks in this element.
*
* @return an ArrayList
*/
public ArrayList getChunks();
/**
* Gets the content of the text element.
*
* @return a type
*/
public String toString();
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