I'm currently developing a method that will accept HTML input and convert it into a valid PDF/A file. I know how to programmatically construct a valid PDF/A file using iText (reference: http://itextsupport.com/download/pdfa3.html) but I'm unable to generate a valid PDF/A file using HTML as input and using XMLWorker to transform this input into a PDF file. The problem that I have right now is due to the embedded fonts requirement of the PDF/A format. I always get this exception:
Exception in thread "main" com.itextpdf.text.pdf.PdfAConformanceException: All the fonts must be embedded. This one isn't: Helvetica
I try to force which fonts will the HTML input use via a CSS file and I register the fonts I want to use in the output PDF file via the XMLWorkerFontProvider class, but it seems I'm doing something wrong because the exception commented above is always thrown.
What else do I need in order to XMLWorker uses the fonts registered via XMLWorkerFontProvider class? I want to avoid the use of the default font Helvetica in every HTML element present in the input.
Below is the code I'm using for testing:
style.css (just 1 line):
* { font: normal 100% Arial, sans-serif !important; }
Main.java:
package com.itextpdf;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.ICC_Profile;
import com.itextpdf.text.pdf.PdfAConformanceLevel;
import com.itextpdf.text.pdf.PdfAWriter;
import com.itextpdf.tool.xml.XMLWorker;
import com.itextpdf.tool.xml.XMLWorkerFontProvider;
import com.itextpdf.tool.xml.XMLWorkerHelper;
import com.itextpdf.tool.xml.css.CssFile;
import com.itextpdf.tool.xml.css.StyleAttrCSSResolver;
import com.itextpdf.tool.xml.html.CssAppliers;
import com.itextpdf.tool.xml.html.CssAppliersImpl;
import com.itextpdf.tool.xml.html.Tags;
import com.itextpdf.tool.xml.parser.XMLParser;
import com.itextpdf.tool.xml.pipeline.css.CSSResolver;
import com.itextpdf.tool.xml.pipeline.css.CssResolverPipeline;
import com.itextpdf.tool.xml.pipeline.end.PdfWriterPipeline;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipeline;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipelineContext;
public class Main {
/**
* @param args
*/
public static void main(String[] args) {
StringBuffer buf = new StringBuffer();
buf.append("<!DOCTYPE html>");
buf.append("<html>");
buf.append("<head>");
buf.append("<title>Test</title>");
buf.append("</head>");
buf.append("<body>");
buf.append("<p>This is a test</p>");
buf.append("</body>");
buf.append("</html>");
OutputStream file = null;
Document document = null;
PdfAWriter writer = null;
try {
file = new FileOutputStream(new File("C:\Users\amartin\Desktop\Test.pdf"));
document = new Document();
writer = PdfAWriter.getInstance(document, file, PdfAConformanceLevel.PDF_A_1B);
// Create XMP metadata. It's a PDF/A requirement.
writer.createXmpMetadata();
document.open();
// Set output intent. PDF/A requirement.
ICC_Profile icc = ICC_Profile.getInstance(new FileInputStream("./src/main/resources/com/itextpdf/sRGB Color Space Profile.icm"));
writer.setOutputIntents("Custom", "", "http://www.color.org", "sRGB IEC61966-2.1", icc);
// CSS
CSSResolver cssResolver = new StyleAttrCSSResolver();
CssFile cssFile = XMLWorkerHelper.getCSS(new FileInputStream("./css/style.css"));
cssResolver.addCss(cssFile);
XMLWorkerFontProvider fontProvider = new XMLWorkerFontProvider();
fontProvider.register("./fonts/arial.ttf");
fontProvider.register("./fonts/sans-serif.ttf");
fontProvider.addFontSubstitute("lowagie", "garamond");
CssAppliers cssAppliers = new CssAppliersImpl(fontProvider);
HtmlPipelineContext htmlContext = new HtmlPipelineContext(cssAppliers);
htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());
// Pipelines
PdfWriterPipeline pdf = new PdfWriterPipeline(document, writer);
HtmlPipeline html = new HtmlPipeline(htmlContext, pdf);
CssResolverPipeline css = new CssResolverPipeline(cssResolver, html);
XMLWorker worker = new XMLWorker(css, true);
XMLParser p = new XMLParser(worker);
Reader reader = new StringReader(buf.toString());
p.parse(reader);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (document != null && document.isOpen())
document.close();
try {
if (file != null)
file.close();
} catch (IOException e) {}
if (writer != null && !writer.isCloseStream())
writer.close();
}
}
}
edit:
Answering to Bruno, I have extended the FontFactoryImp class overriding the getFont() method (the one that has all the arguments). It calls the the System.out.println function like this:
System.out.println("=fontname: " + fontname + " =encoding: " + encoding + " =embedded : " + embedded + " =size: " + size + " =style: " + style + " =BaseColor: " + color)
and then calls parent.getFont() method with the same arguments. The only output I see is this:
=fontname: null =encoding: Cp1252 =embedded : true =size: -1.0 =style: -1 =BaseColor: null
=fontname: null =encoding: Cp1252 =embedded : true =size: -1.0 =style: -1 =BaseColor: null
and the exception thrown, pasted before this code.
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