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pdfHTML is an iText 7 add-on that lets you to parse (X)HTML snippets and the associated CSS and converts
them to PDF.
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2019 iText Group NV
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
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.html2pdf.attach.impl.tags;
import com.itextpdf.html2pdf.attach.ITagWorker;
import com.itextpdf.html2pdf.attach.ProcessorContext;
import com.itextpdf.html2pdf.attach.impl.layout.form.element.IFormField;
import com.itextpdf.html2pdf.attach.util.WaitingInlineElementsHelper;
import com.itextpdf.html2pdf.css.CssConstants;
import com.itextpdf.layout.IPropertyContainer;
import com.itextpdf.layout.element.AreaBreak;
import com.itextpdf.layout.element.Div;
import com.itextpdf.layout.element.IBlockElement;
import com.itextpdf.layout.element.IElement;
import com.itextpdf.layout.element.ILeafElement;
import com.itextpdf.layout.element.Image;
import com.itextpdf.styledxmlparser.node.IElementNode;
import java.util.Map;
/**
* TagWorker class for the {@code div} element.
*/
public class DivTagWorker implements ITagWorker, IDisplayAware {
/** The div element. */
private Div div;
/** Helper class for waiting inline elements. */
private WaitingInlineElementsHelper inlineHelper;
/** The display value. */
private String display;
/**
* Creates a new {@link DivTagWorker} instance.
*
* @param element the element
* @param context the context
*/
public DivTagWorker(IElementNode element, ProcessorContext context) {
div = new Div();
Map styles = element.getStyles();
inlineHelper = new WaitingInlineElementsHelper(styles == null ? null : styles.get(CssConstants.WHITE_SPACE),
styles == null ? null : styles.get(CssConstants.TEXT_TRANSFORM));
display = element.getStyles() != null ? element.getStyles().get(CssConstants.DISPLAY) : null;
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#processEnd(com.itextpdf.html2pdf.html.node.IElementNode, com.itextpdf.html2pdf.attach.ProcessorContext)
*/
@Override
public void processEnd(IElementNode element, ProcessorContext context) {
inlineHelper.flushHangingLeaves(div);
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#processContent(java.lang.String, com.itextpdf.html2pdf.attach.ProcessorContext)
*/
@Override
public boolean processContent(String content, ProcessorContext context) {
inlineHelper.add(content);
return true;
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#processTagChild(com.itextpdf.html2pdf.attach.ITagWorker, com.itextpdf.html2pdf.attach.ProcessorContext)
*/
@Override
public boolean processTagChild(ITagWorker childTagWorker, ProcessorContext context) {
boolean processed = false;
IPropertyContainer element = childTagWorker.getElementResult();
if (childTagWorker instanceof BrTagWorker) {
inlineHelper.add((ILeafElement) childTagWorker.getElementResult());
return true;
} else if (childTagWorker instanceof IDisplayAware && CssConstants.INLINE_BLOCK.equals(((IDisplayAware) childTagWorker).getDisplay()) && childTagWorker.getElementResult() instanceof IBlockElement) {
inlineHelper.add((IBlockElement) childTagWorker.getElementResult());
return true;
} else if (childTagWorker instanceof SpanTagWorker) {
boolean allChildrenProcessed = true;
for (IPropertyContainer childElement : ((SpanTagWorker) childTagWorker).getAllElements()) {
if (childElement instanceof ILeafElement) {
inlineHelper.add((ILeafElement) childElement);
} else if (childElement instanceof IBlockElement && CssConstants.INLINE_BLOCK.equals(((SpanTagWorker) childTagWorker).getElementDisplay(childElement))) {
inlineHelper.add((IBlockElement) childElement);
} else if (childElement instanceof IElement) {
allChildrenProcessed = addBlockChild((IElement) childElement) && allChildrenProcessed;
}
}
processed = allChildrenProcessed;
} else if (element instanceof IFormField && !(childTagWorker instanceof IDisplayAware && CssConstants.BLOCK.equals(((IDisplayAware) childTagWorker).getDisplay()))) {
inlineHelper.add((IBlockElement) element);
processed = true;
} else if (element instanceof AreaBreak) {
postProcessInlineGroup();
div.add((AreaBreak) element);
processed = true;
} else if (childTagWorker instanceof ImgTagWorker && element instanceof IElement && !CssConstants.BLOCK.equals(((ImgTagWorker) childTagWorker).getDisplay())) {
inlineHelper.add((ILeafElement) childTagWorker.getElementResult());
processed = true;
} else if (element instanceof com.itextpdf.layout.element.IElement) {
processed = addBlockChild((com.itextpdf.layout.element.IElement) element);
}
return processed;
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#getElementResult()
*/
@Override
public IPropertyContainer getElementResult() {
return div;
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.impl.tags.IDisplayAware#getDisplay()
*/
@Override
public String getDisplay() {
return display;
}
/**
* Adds a child element to the div block.
*
* @param element the element
* @return true, if successful
*/
private boolean addBlockChild(com.itextpdf.layout.element.IElement element) {
postProcessInlineGroup();
boolean processed = false;
if (element instanceof IBlockElement) {
div.add(((IBlockElement) element));
processed = true;
} else if (element instanceof Image) {
div.add((Image) element);
processed = true;
}
return processed;
}
/**
* Post-processes the hanging leaves of the waiting inline elements.
*/
private void postProcessInlineGroup() {
inlineHelper.flushHangingLeaves(div);
}
}