/*
* $Id: Element.java 4879 2011-05-23 23:27:02Z redlab_b $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text;
import java.util.List;
/**
* Interface for a text element.
* <P>
* Remark: I looked at the interface javax.swing.text.Element, but I decided to
* write my own text-classes for two reasons:
* <OL>
* <LI>The javax.swing.text-classes may be very generic, I think they are
* overkill: they are to heavy for what they have to do.
* <LI>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.
* </OL>
*
* @see Anchor
* @see Chapter
* @see Chunk
* @see Header
* @see Image
* @see Jpeg
* @see List
* @see ListItem
* @see Meta
* @see Paragraph
* @see Phrase
* @see Rectangle
* @see Section
*/
public interface Element {
// static membervariables (meta information)
/** This is a possible type of <CODE>Element</CODE>. */
public static final int HEADER = 0;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int TITLE = 1;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int SUBJECT = 2;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int KEYWORDS = 3;
/** This is a possible type of <CODE>Element </CIDE>. */
public static final int AUTHOR = 4;
/** This is a possible type of <CODE>Element </CIDE>. */
public static final int PRODUCER = 5;
/** This is a possible type of <CODE>Element </CIDE>. */
public static final int CREATIONDATE = 6;
/** This is a possible type of <CODE>Element </CIDE>. */
public static final int CREATOR = 7;
// static membervariables (content)
/** This is a possible type of <CODE>Element</CODE>. */
public static final int CHUNK = 10;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int PHRASE = 11;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int PARAGRAPH = 12;
/** This is a possible type of <CODE>Element</CODE> */
public static final int SECTION = 13;
/** This is a possible type of <CODE>Element</CODE> */
public static final int LIST = 14;
/** This is a possible type of <CODE>Element</CODE> */
public static final int LISTITEM = 15;
/** This is a possible type of <CODE>Element</CODE> */
public static final int CHAPTER = 16;
/** This is a possible type of <CODE>Element</CODE> */
public static final int ANCHOR = 17;
// static membervariables (tables)
/** This is a possible type of <CODE>Element</CODE>. */
public static final int PTABLE = 23;
// static membervariables (annotations)
/** This is a possible type of <CODE>Element</CODE>. */
public static final int ANNOTATION = 29;
// static membervariables (geometric figures)
/** This is a possible type of <CODE>Element</CODE>. */
public static final int RECTANGLE = 30;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int JPEG = 32;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int JPEG2000 = 33;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int IMGRAW = 34;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int IMGTEMPLATE = 35;
/**
* This is a possible type of <CODE>Element</CODE>.
* @since 2.1.5
*/
public static final int JBIG2 = 36;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int MULTI_COLUMN_TEXT = 40;
/** This is a possible type of <CODE>Element</CODE>. */
public static final int MARKED = 50;
/** This is a possible type of <CODE>Element</CODE>.
* @since 2.1.2
*/
public static final int YMARK = 55;
/**
* This is an element thats not an element.
* @see WritableDirectElement
*/
public static final int WRITABLE_DIRECT = 666;
// 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 <CODE>
* ElementListener</CODE>.
*
* @param listener
* an <CODE>ElementListener</CODE>
* @return <CODE>true</CODE> 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 <CODE>ArrayList</CODE>
*/
public List<Chunk> getChunks();
/**
* Gets the content of the text element.
*
* @return a type
*/
public String toString();
}
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