Adding a proccessing instruction

[Daniel Siino <DS...@Intellitrans.com>]

Hi,

 

This has been mentioned in 2 previous posts: 

http://mail-archives.apache.org/eyebrowse/ReadMsg?listId=53
<http://mail-archives.apache.org/eyebrowse/ReadMsg?listId=53&msgNo=2188>
&msgNo=2188

http://mail-archives.apache.org/eyebrowse/ReadMsg?listId=53
<http://mail-archives.apache.org/eyebrowse/ReadMsg?listId=53&msgNo=1435>
&msgNo=1435

 

but it still doesn't work for me. Here's the code

 

DOMImplementation domImpl = SVGDOMImplementation.getDOMImplementation();

String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;

Document document = domImpl.createDocument(svgNS, "svg", null);

String strPI = ("type=\"text/css\" href=\"css/svgstyle.css\" ");

ProcessingInstruction pi =
document.createProcessingInstruction("xml-stylesheet", strPI);

document.insertBefore(pi, document.getDocumentElement() );

 

and here's the result as displayed by view SVG source in IE (with Adobe
plug-in version 3 and 6)

 

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.0//EN'
'http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd'>

<svg style="stroke-dasharray:none; .... >

  <defs id="genericDefs" />

  <g>

    <g style="fill:aqua; stroke:aqua;">

      <rect x="5" y="5" width="600" style="fill:none;" height="400" />

     </g>

  </g>

</svg>

 

The content is generated using 

svggen.stream(svgOutput, true); but I also tried passing the root 

svggen.stream(root, svgOutput, true);

 I also tried setting the use css param to false.

 

The debugger does show that the first child is a SVGStyleSheetInstruction
but it most be removed at some point.

 

Any help would be greatly appreciated.

 

Thanks

 

Daniel

 

Re: Adding a proccessing instruction

[Cameron McCormack <ca...@aka.mcc.id.au>]

I wrote:
> It seems that the SVG generator doesn't actually output any processing
> instructions it comes across.  You could add this support pretty easily
> by modifying org/apache/batik/svggen/XmlWriter.java to add a method to
> write the PIs:

Ok, so it seems it's not so simple.  The SVGGraphics2D object will just
copy over the document element from the generated SVG tree to be
serialized.  You could, as well as the other changes I mentioned, change
the line in SVGGraphics2D.stream(Element, Writer, boolean) that says
this:

  svgDocument.appendChild(svgRoot);

with this:

  if (rootParent == null) {
      for (Node n = svgRoot.getOwnerDocument().getFirstChild();
              n != null; n = n.getNextSibling()) {
          int t = n.getNodeType();
          if (t == Node.ELEMENT_NODE) {
              svgDocument.appendChild(n);
          }
          if (t == Node.PROCESSING_INSTRUCTION_NODE) {
              svgDocument.appendChild(n.cloneNode(false));
          }
      }
  } else {
      svgDocument.appendChild(svgRoot);
  }

It's a bit hackish, but should work.  If you were serializing only a
subtree of the generated document, though, the PIs wouldn't get written
out.  (But I'm not sure that you would want them there anyway.)

Cameron

-- 
Cameron McCormack
|  Web: http://mcc.id.au/
|  ICQ: 26955922

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Re: Adding a proccessing instruction

[Cameron McCormack <ca...@aka.mcc.id.au>]

Hi Daniel.

Daniel Siino:
> DOMImplementation domImpl = SVGDOMImplementation.getDOMImplementation();
> 
> String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;
> 
> Document document = domImpl.createDocument(svgNS, "svg", null);
> 
> String strPI = ("type=\"text/css\" href=\"css/svgstyle.css\" ");
> 
> ProcessingInstruction pi =
> document.createProcessingInstruction("xml-stylesheet", strPI);
> 
> document.insertBefore(pi, document.getDocumentElement() );

...

> The content is generated using 
> 
> svggen.stream(svgOutput, true); but I also tried passing the root 
> 
> svggen.stream(root, svgOutput, true);

It seems that the SVG generator doesn't actually output any processing
instructions it comes across.  You could add this support pretty easily
by modifying org/apache/batik/svggen/XmlWriter.java to add a method to
write the PIs:

  private static void writeXml(ProcessingInstruction pi, IndentWriter out)
          throws IOException, SVGGraphics2DIOException {
      out.write("<?");
      out.write(pi.getTarget());
      String data = pi.getData();
      if (data.length() > 0) {
          out.write(" ");
	  out.write(data);
      }
      out.write("?>");
      out.write(EOL);
  }

and add a case to the switch statement in writeXml(Node, Writer):

      case Node.PROCESSING_INSTRUCTION:
          writeXml((ProcessingInstruction)node, out);
	  break;

and add an import line at the top:

  import org.w3c.dom.ProcessingInstruction;

Cameron

-- 
Cameron McCormack
|  Web: http://mcc.id.au/
|  ICQ: 26955922

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