/*
* $Id: PdfPageEventForwarder.java 4242 2010-01-02 23:22:20Z xlv $
*
* This file is part of the iText project.
* Copyright (c) 1998-2009 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,
* you 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: sales@itextpdf.com
*/
package com.itextpdf.text.pdf.events;
import java.util.ArrayList;
import com.itextpdf.text.Document;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfPageEvent;
import com.itextpdf.text.pdf.PdfWriter;
/**
* If you want to add more than one page event to a PdfWriter,
* you have to construct a PdfPageEventForwarder, add the
* different events to this object and add the forwarder to
* the PdfWriter.
*/
public class PdfPageEventForwarder implements PdfPageEvent {
/** ArrayList containing all the PageEvents that have to be executed. */
protected ArrayList<PdfPageEvent> events = new ArrayList<PdfPageEvent>();
/**
* Add a page event to the forwarder.
* @param event an event that has to be added to the forwarder.
*/
public void addPageEvent(PdfPageEvent event) {
events.add(event);
}
/**
* Called when the document is opened.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
*/
public void onOpenDocument(PdfWriter writer, Document document) {
for (PdfPageEvent event: events) {
event.onOpenDocument(writer, document);
}
}
/**
* Called when a page is initialized.
* <P>
* Note that if even if a page is not written this method is still called.
* It is preferable to use <CODE>onEndPage</CODE> to avoid infinite loops.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
*/
public void onStartPage(PdfWriter writer, Document document) {
for (PdfPageEvent event: events) {
event.onStartPage(writer, document);
}
}
/**
* Called when a page is finished, just before being written to the
* document.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
*/
public void onEndPage(PdfWriter writer, Document document) {
for (PdfPageEvent event: events) {
event.onEndPage(writer, document);
}
}
/**
* Called when the document is closed.
* <P>
* Note that this method is called with the page number equal to the last
* page plus one.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
*/
public void onCloseDocument(PdfWriter writer, Document document) {
for (PdfPageEvent event: events) {
event.onCloseDocument(writer, document);
}
}
/**
* Called when a Paragraph is written.
* <P>
* <CODE>paragraphPosition</CODE> will hold the height at which the
* paragraph will be written to. This is useful to insert bookmarks with
* more control.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
* @param paragraphPosition
* the position the paragraph will be written to
*/
public void onParagraph(PdfWriter writer, Document document,
float paragraphPosition) {
for (PdfPageEvent event: events) {
event.onParagraph(writer, document, paragraphPosition);
}
}
/**
* Called when a Paragraph is written.
* <P>
* <CODE>paragraphPosition</CODE> will hold the height of the end of the
* paragraph.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
* @param paragraphPosition
* the position of the end of the paragraph
*/
public void onParagraphEnd(PdfWriter writer, Document document,
float paragraphPosition) {
for (PdfPageEvent event: events) {
event.onParagraphEnd(writer, document, paragraphPosition);
}
}
/**
* Called when a Chapter is written.
* <P>
* <CODE>position</CODE> will hold the height at which the chapter will be
* written to.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
* @param paragraphPosition
* the position the chapter will be written to
* @param title
* the title of the Chapter
*/
public void onChapter(PdfWriter writer, Document document,
float paragraphPosition, Paragraph title) {
for (PdfPageEvent event: events) {
event.onChapter(writer, document, paragraphPosition, title);
}
}
/**
* Called when the end of a Chapter is reached.
* <P>
* <CODE>position</CODE> will hold the height of the end of the chapter.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
* @param position
* the position of the end of the chapter.
*/
public void onChapterEnd(PdfWriter writer, Document document, float position) {
for (PdfPageEvent event: events) {
event.onChapterEnd(writer, document, position);
}
}
/**
* Called when a Section is written.
* <P>
* <CODE>position</CODE> will hold the height at which the section will be
* written to.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
* @param paragraphPosition
* the position the section will be written to
* @param depth
* the number depth of the Section
* @param title
* the title of the section
*/
public void onSection(PdfWriter writer, Document document,
float paragraphPosition, int depth, Paragraph title) {
for (PdfPageEvent event: events) {
event.onSection(writer, document, paragraphPosition, depth, title);
}
}
/**
* Called when the end of a Section is reached.
* <P>
* <CODE>position</CODE> will hold the height of the section end.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
* @param position
* the position of the end of the section
*/
public void onSectionEnd(PdfWriter writer, Document document, float position) {
for (PdfPageEvent event: events) {
event.onSectionEnd(writer, document, position);
}
}
/**
* Called when a <CODE>Chunk</CODE> with a generic tag is written.
* <P>
* It is useful to pinpoint the <CODE>Chunk</CODE> location to generate
* bookmarks, for example.
*
* @param writer
* the <CODE>PdfWriter</CODE> for this document
* @param document
* the document
* @param rect
* the <CODE>Rectangle</CODE> containing the <CODE>Chunk
* </CODE>
* @param text
* the text of the tag
*/
public void onGenericTag(PdfWriter writer, Document document,
Rectangle rect, String text) {
PdfPageEvent event;
for (Object element : events) {
event = (PdfPageEvent)element;
event.onGenericTag(writer, document, rect, text);
}
}
}