/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2017 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: sales@itextpdf.com
*/
package com.itextpdf.tool.xml.html.head;
import java.util.ArrayList;
import java.util.List;
import com.itextpdf.text.Element;
import com.itextpdf.text.log.Logger;
import com.itextpdf.text.log.LoggerFactory;
import com.itextpdf.tool.xml.NoCustomContextException;
import com.itextpdf.tool.xml.Tag;
import com.itextpdf.tool.xml.WorkerContext;
import com.itextpdf.tool.xml.exceptions.CssResolverException;
import com.itextpdf.tool.xml.exceptions.LocaleMessages;
import com.itextpdf.tool.xml.html.AbstractTagProcessor;
import com.itextpdf.tool.xml.html.HTML;
import com.itextpdf.tool.xml.pipeline.css.CssResolverPipeline;
/**
* The Link TagProcessor will try to add the content of a <link> that has the attribute type set to "text/css" to the
* {@link CssResolverPipeline} CSS. If the content cannot be parsed, an error is logged.
* @author redlab_b
*
*/
public class Link extends AbstractTagProcessor {
private static final Logger LOG = LoggerFactory.getLogger(Link.class);
/* (non-Javadoc)
* @see com.itextpdf.tool.xml.TagProcessor#startElement(com.itextpdf.tool.xml.Tag)
*/
@Override
public List<Element> start(final WorkerContext ctx, final Tag tag) {
if (HTML.Attribute.Value.TEXTCSS.equalsIgnoreCase(tag.getAttributes().get(HTML.Attribute.TYPE))) {
String href = tag.getAttributes().get(HTML.Attribute.HREF);
if (null != href) {
try {
getCSSResolver(ctx).addCssFile(href, false);
} catch (CssResolverException e) {
LOG.error(String.format(LocaleMessages.getInstance().getMessage(LocaleMessages.LINK_404), href), e);
} catch (NoCustomContextException e) {
LOG.warn(String.format(LocaleMessages.getInstance().getMessage(LocaleMessages.CUSTOMCONTEXT_404_CONTINUE), CssResolverPipeline.class.getName()));
}
}
}
return new ArrayList<Element>(0);
}
}