scilab/modules/helptools/src/java/org/scilab/modules/helptools/FopConverter.java

   1 package org.scilab.modules.helptools;
   2
   3 import java.io.BufferedOutputStream;
   4 import java.io.File;
   5 import java.io.FileNotFoundException;
   6 import java.io.FileOutputStream;
   7 import java.io.IOException;
   8 import java.io.OutputStream;
   9
  10 import javax.xml.transform.Result;
  11 import javax.xml.transform.Source;
  12 import javax.xml.transform.Transformer;
  13 import javax.xml.transform.TransformerConfigurationException;
  14 import javax.xml.transform.TransformerException;
  15 import javax.xml.transform.TransformerFactory;
  16 import javax.xml.transform.sax.SAXResult;
  17 import javax.xml.transform.stream.StreamSource;
  18
  19 import org.apache.fop.apps.FOPException;
  20 import org.apache.fop.apps.Fop;
  21 import org.apache.fop.apps.FopFactory;
  22 import org.apache.fop.apps.FormattingResults;
  23 import org.apache.fop.apps.MimeConstants;
  24 import org.scilab.forge.jlatexmath.fop.JLaTeXMathElementMapping;
  25 import org.scilab.forge.jlatexmath.fop.JLaTeXMathXMLHandler;
  26 import org.scilab.modules.commons.xml.ScilabTransformerFactory;
  27 import org.xml.sax.SAXException;
  28
  29 public class FopConverter extends ContainerConverter {
  30
  31     final Backend format;
  32
  33     public FopConverter(SciDocMain sciDocMain) {
  34         super(sciDocMain.getOutputDirectory(), sciDocMain.getLanguage());
  35         this.format = sciDocMain.getFormat();
  36     }
  37
  38     @Override
  39     public void convert() throws SAXException, IOException {
  40         String baseName = Helpers.getBaseName(language);
  41         /* the following '..' is used because we are in the current working
  42            directory with all the tmp stuff in it */
  43         String fileName = outputDirectory + "/" + baseName + "." + format.name().toLowerCase();
  44
  45         try {
  46             final File configuration = new File(System.getenv("SCI") + "/modules/helptools/etc/fopconf.xml");
  47             FopFactory fopFactory = FopFactory.newInstance(configuration);
  48             fopFactory.addElementMapping(new JLaTeXMathElementMapping());
  49             fopFactory.getXMLHandlerRegistry().addXMLHandler(new JLaTeXMathXMLHandler());
  50
  51             // Step 3: Construct fop with desired output format
  52             OutputStream out = new BufferedOutputStream(new FileOutputStream(fileName));
  53             final Fop fop;
  54             switch (format) {
  55                 case PS:
  56                     fop = fopFactory.newFop(MimeConstants.MIME_POSTSCRIPT, out);
  57                     break;
  58                 case PDF:
  59                     fop = fopFactory.newFop(MimeConstants.MIME_POSTSCRIPT, out);
  60                     break;
  61
  62                 default:
  63                     out.close();
  64                     throw new IOException(String.format("%s is not a supported format.\n", format));
  65             }
  66
  67             // Step 4: Setup JAXP using identity transformer
  68             String factoryName = ScilabTransformerFactory.useDefaultTransformerFactoryImpl();
  69             TransformerFactory factory = TransformerFactory.newInstance();
  70             Transformer transformer = factory.newTransformer(); // identity transformer
  71             // Step 5: Setup input and output for XSLT transformation
  72             // Setup input stream
  73             Source src = new StreamSource(new File(Helpers.getTemporaryNameFo(outputDirectory)));
  74
  75             // Resulting SAX events (the generated FO) must be piped through to FOP
  76             Result res = new SAXResult(fop.getDefaultHandler());
  77
  78             // Step 6: Start XSLT transformation and FOP processing
  79             transformer.transform(src, res);
  80             ScilabTransformerFactory.restoreTransformerFactoryImpl(factoryName);
  81
  82             FormattingResults foResults = fop.getResults();
  83             System.out.println("Generated " + foResults.getPageCount() + " pages in total.");
  84
  85             //Clean-up
  86             out.close();
  87         } catch (FOPException e) {
  88             System.out.println(e.getLocalizedMessage());
  89         } catch (FileNotFoundException e) {
  90             System.out.println(e.getLocalizedMessage());
  91         } catch (TransformerConfigurationException e) {
  92             System.out.println(e.getLocalizedMessage());
  93         } catch (TransformerException e) {
  94             System.out.println(e.getLocalizedMessage());
  95         } catch (IOException e) {
  96             System.out.println(e.getLocalizedMessage());
  97         } catch (SAXException e) {
  98             System.out.println(e.getLocalizedMessage());
  99         }
 100     }
 101
 102     @Override
 103     public void install() throws IOException {
 104     }
 105 }