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From gree...@locus.apache.org
Subject cvs commit: xml-cocoon/src/org/apache/cocoon/formatter FO2PDFFormatter.java
Date Fri, 01 Dec 2000 18:00:15 GMT
greenrd     00/12/01 10:00:14

  Modified:    src/org/apache/cocoon/formatter FO2PDFFormatter.java
  Log:
  dirty hack to make Xalan 1.x work with FOP 0.14 and higher - you now need FOP 0.14 or higher
to build cocoon but not to run it
  
  Revision  Changes    Path
  1.5       +80 -11    xml-cocoon/src/org/apache/cocoon/formatter/FO2PDFFormatter.java
  
  Index: FO2PDFFormatter.java
  ===================================================================
  RCS file: /home/cvs/xml-cocoon/src/org/apache/cocoon/formatter/FO2PDFFormatter.java,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- FO2PDFFormatter.java	2000/08/18 22:42:27	1.4
  +++ FO2PDFFormatter.java	2000/12/01 18:00:13	1.5
  @@ -1,4 +1,4 @@
  -/*-- $Id: FO2PDFFormatter.java,v 1.4 2000/08/18 22:42:27 stefano Exp $ -- 
  +/*-- $Id: FO2PDFFormatter.java,v 1.5 2000/12/01 18:00:13 greenrd Exp $ -- 
   
    ============================================================================
                      The Apache Software License, Version 1.1
  @@ -53,37 +53,106 @@
   import java.io.*;
   import java.util.*;
   import org.w3c.dom.*;
  -import org.apache.fop.apps.*;
  +import org.xml.sax.InputSource;
  +import org.apache.fop.apps.Driver;
   import org.apache.cocoon.framework.*;
  +import org.apache.cocoon.parser.Parser;
  +import org.apache.xerces.parsers.SAXParser;
   
   /**
    * This class wraps around FOP to perform XSL:FO to PDF formatting.
    *
    * @author <a href="mailto:stefano@apache.org">Stefano Mazzocchi</a>
  - * @version $Revision: 1.4 $ $Date: 2000/08/18 22:42:27 $
  + * @version $Revision: 1.5 $ $Date: 2000/12/01 18:00:13 $
    */
   
  -public class FO2PDFFormatter extends AbstractFormatter {
  +public class FO2PDFFormatter extends AbstractFormatter implements Actor {
  +
  +
  +    /* 
  +     * If FOP version >= 0.14 we may need to reparse the result to enforce the namespace
  +     * compliance that FOP now requires but Xalan does not provide. (This only affects
  +     * FO documents that have been styled by a stylesheet but for simplicitly we apply
  +     * it to all incoming documents if the FOP version is >= 0.14.
  +     */
  +    private static final String FOP_VERSION = org.apache.fop.apps.Version.getVersion ();
  +    private static final Hashtable NO_PARAMETERS = new Hashtable ();
  +    private static final double UNKNOWN_VERSION = -1.0;
  +    private static double FOP_VERSION_NO;
  +    static {
  +        try {
  +           // This is a real mess! Why couldn't they just do a getVersionNumber() method!?
  +           int i = FOP_VERSION.indexOf (' ', 4);
  +           if (i == -1) i = FOP_VERSION.length ();
  +           String vn = FOP_VERSION.substring (4, i).replace ('_', '.');
  +           // only interested in first dot, if any
  +           i = vn.indexOf ('.');
  +           if (i != -1) i = vn.indexOf ('.', i + 1);
  +           if (i != -1) vn = vn.substring (0, i);
  +           FOP_VERSION_NO = Double.parseDouble (vn);
  +        }
  +        catch (Exception ex) {
  +           FOP_VERSION_NO = UNKNOWN_VERSION;
  +        }
  +        System.err.println ("FOP_VERSION = " + FOP_VERSION);
  +        System.err.println ("FOP_VERSION_NO = " + FOP_VERSION_NO);
  +    }
  +
  +    protected Director director;
  +    protected Formatter xmlFormatter;
  +    protected Parser parser;
    
       public FO2PDFFormatter() {
           super.MIMEtype = "application/pdf";
  -        super.statusMessage = Version.getVersion() + " formatter";
  +        super.statusMessage = FOP_VERSION + " formatter (note: version number is often
wildly inaccurate)";
       }
           
       public void init(Configurations conf) {
           super.init(conf);
       }
   
  +    public void init(Director director) {
  +        // other components might not have been setup yet, so defer this
  +        this.director = director;
  +    }
  +
  +    protected void deferredInit () throws Exception {
  +        if (xmlFormatter == null) { // don't bother initting multiple times
  +            FormatterFactory formatters = (FormatterFactory) director.getActor ("formatters");
  +            xmlFormatter = formatters.getFormatterForType ("text/xml");
  +            parser = (Parser) director.getActor ("parser");
  +        }
  +    }
  +
       public void format(Document document, Writer writer, Dictionary parameters) throws
Exception {
   	    Driver driver = new Driver();
  -	    driver.setRenderer("org.apache.fop.render.pdf.PDFRenderer", Version.getVersion());
  +	    driver.setRenderer("org.apache.fop.render.pdf.PDFRenderer", FOP_VERSION);
   	    driver.addElementMapping("org.apache.fop.fo.StandardElementMapping");
   	    driver.addElementMapping("org.apache.fop.svg.SVGElementMapping");
  -	    //driver.addPropertyList("org.apache.fop.fo.StandardPropertyListMapping");
  -	    //driver.addPropertyList("org.apache.fop.svg.SVGPropertyListMapping");
  -	    driver.setWriter(new PrintWriter(writer));
  -	    driver.buildFOTree(document);
  +            driver.setWriter(new PrintWriter(writer));
  +
  +	    if (FOP_VERSION_NO > 0.13) {
  +  	        driver.addPropertyList("org.apache.fop.fo.StandardPropertyListMapping");
  +	        driver.addPropertyList("org.apache.fop.svg.SVGPropertyListMapping");
  +
  +                // To workaround the problem that Xalan 1.x does not output DOM2-compliant
namespaces,
  +                // we use a major hack - output xml as a string and read it in again. 
  +                // With a DOM2-compliant parser such as Xerces, this should work fine.
  +                deferredInit ();
  +                StringWriter tempWriter = new StringWriter ();
  +                xmlFormatter.format (document, tempWriter, NO_PARAMETERS);
  +                String tempXml = tempWriter.toString ();
  +
  +                // For now, we just use Xerces - it would be more complicated to support
  +                // other parsers here.
  +                SAXParser parser = new SAXParser ();
  +                parser.setFeature("http://xml.org/sax/features/namespaces", true);
  +                driver.buildFOTree(parser, new InputSource (new StringReader (tempXml)));
  +            }
  +            else {
  +	        driver.buildFOTree(document);
  +            }
   	    driver.format();
   	    driver.render();
       }
  -}
  \ No newline at end of file
  +}
  
  
  

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