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Parses XML to PDF, with CSS support, using iText
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/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2022 iText Group NV
* Authors: Balder Van Camp, Emiel Ackermann, 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
* ITEXT GROUP. ITEXT GROUP 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.tool.xml.html;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.WritableDirectElement;
import com.itextpdf.text.log.Level;
import com.itextpdf.text.log.Logger;
import com.itextpdf.text.log.LoggerFactory;
import com.itextpdf.text.pdf.PdfDestination;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfOutline;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.NoCustomContextException;
import com.itextpdf.tool.xml.Tag;
import com.itextpdf.tool.xml.WorkerContext;
import com.itextpdf.tool.xml.exceptions.LocaleMessages;
import com.itextpdf.tool.xml.exceptions.RuntimeWorkerException;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipelineContext;
import com.itextpdf.tool.xml.util.ParentTreeUtil;
/**
* @author Emiel Ackermann, redlab_b
*
*/
public class Header extends AbstractTagProcessor {
private static final Logger LOGGER = LoggerFactory.getLogger(Header.class);
/* (non-Javadoc)
* @see com.itextpdf.tool.xml.TagProcessor#content(com.itextpdf.tool.xml.Tag, java.util.List, com.itextpdf.text.Document, java.lang.String)
*/
@Override
public List content(final WorkerContext ctx, final Tag tag, final String content) {
return textContent(ctx, tag, content);
}
/* (non-Javadoc)
* @see com.itextpdf.tool.xml.TagProcessor#endElement(com.itextpdf.tool.xml.Tag, java.util.List, com.itextpdf.text.Document)
*/
@Override
public List end(final WorkerContext ctx, final Tag tag, final List currentContent) {
List l = new ArrayList(1);
ParentTreeUtil pt = new ParentTreeUtil();
if (currentContent.size() > 0) {
List currentContentToParagraph = currentContentToParagraph(currentContent, true, true, tag, ctx);
for(Element p : currentContentToParagraph) {
((Paragraph) p).setRole(getHeaderRole(getLevel(tag)));
}
final HtmlPipelineContext context;
try {
context = getHtmlPipelineContext(ctx);
boolean oldBookmark = context.autoBookmark();
if(!(pt.getParentTree(tag).isEmpty())&& pt.getParentTree(tag).contains(HTML.Tag.TD))
context.autoBookmark(false);
/*if(tag.getParent()!=null&&tag.getParent().getName().equals(HTML.Tag.TD)){
context.autoBookmark(false);
System.out.println(tag.getParent().getName());
}*/
if (context.autoBookmark()) {
final Paragraph title = new Paragraph();
for (Element w: currentContentToParagraph) {
title.add(w);
}
l.add(new WritableDirectElement(WritableDirectElement.DIRECT_ELEMENT_TYPE_HEADER) {
public void write(final PdfWriter writer, final Document doc) throws DocumentException {
PdfDestination destination = new PdfDestination(PdfDestination.XYZ, 20,
writer.getVerticalPosition(false), 0);
Map memory = context.getMemory();
HeaderNode tree = (HeaderNode) memory.get(HtmlPipelineContext.BOOKMARK_TREE);
int level = getLevel(tag);
if (null == tree) {
// first h tag encounter
tree = new HeaderNode(0, writer.getRootOutline(), null);
} else {
// calculate parent
int lastLevel = tree.level();
if (lastLevel == level) {
tree = tree.parent();
} else if (lastLevel > level) {
while (lastLevel >= level) {
lastLevel = tree.parent().level();
tree = tree.parent();
}
}
}
if (LOGGER.isLogging(Level.TRACE)) {
LOGGER.trace(String.format(LocaleMessages.getInstance().getMessage(LocaleMessages.ADD_HEADER), title.toString()));
}
HeaderNode node = new HeaderNode(level,new PdfOutline(tree.outline(), destination, title), tree);
memory.put(HtmlPipelineContext.BOOKMARK_TREE, node);
}
});
}
context.autoBookmark(oldBookmark);
} catch (NoCustomContextException e) {
if (LOGGER.isLogging(Level.ERROR)) {
LOGGER.error(LocaleMessages.getInstance().getMessage(LocaleMessages.HEADER_BM_DISABLED), e);
}
}
l.addAll(currentContentToParagraph);
}
return l;
}
private PdfName getHeaderRole(int level) {
switch (level) {
case 1:
return PdfName.H1;
case 2:
return PdfName.H2;
case 3:
return PdfName.H3;
case 4:
return PdfName.H4;
case 5:
return PdfName.H5;
case 6:
return PdfName.H6;
}
return PdfName.H;
}
/**
* @param tag
* @return
*/
private int getLevel(final Tag tag) {
return Integer.parseInt(Character.toString(tag.getName().charAt(1)));
}
/*
* (non-Javadoc)
*
* @see com.itextpdf.tool.xml.TagProcessor#isStackOwner()
*/
@Override
public boolean isStackOwner() {
return true;
}
}