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Posted to fop-dev@xmlgraphics.apache.org by bu...@apache.org on 2002/09/13 11:34:55 UTC
DO NOT REPLY [Bug 12610] New: -
onLoad Action for PDF documents or how to automatically print PDF documents
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=12610
onLoad Action for PDF documents or how to automatically print PDF documents
Summary: onLoad Action for PDF documents or how to automatically
print PDF documents
Product: Fop
Version: 0.20.3
Platform: All
OS/Version: All
Status: NEW
Severity: Enhancement
Priority: Other
Component: pdf renderer
AssignedTo: fop-dev@xml.apache.org
ReportedBy: pik@uniquare.com
PDF documents allows the execution of JavaScript if the document is loaded. I used
<fo:root...
<fox:init xmlns:fox="http://xml.apache.org/fop/extensions">this.print\(false, 0,
this.numPages-1\);</fox:init>
...
to automatically print the document on the default printer.
To achive this the following changes are necessary in FOP 0.20.3:
- add a new FO extension (Init)
- modify the ExtensionElementMapping
- add a new PDF object (PDFInit)
- modify the PDFDocument and PDFRoot Classes
- modify the PDFRenderer
I hope this, or a similar mechanism will be included in future FOP
releases.
New classes:
-Init.java--------------------------------------------------------------
package org.apache.fop.extensions;
import org.apache.fop.fo.*;
import org.apache.fop.apps.FOPException;
import java.util.*;
import org.xml.sax.Attributes;
/**
* @author pik
*
*/
public class Init extends ExtensionObj
{
private String javaScript = "";
public static class Maker extends org.apache.fop.fo.FObj.Maker
{
public FObj make(FObj fobj, PropertyList propertylist)
{
return new Init(fobj, propertylist);
}
public Maker()
{
}
}
public static org.apache.fop.fo.FObj.Maker maker()
{
return new Maker();
}
public Init(FObj parent, PropertyList propertylist)
{
super(parent, propertylist);
}
protected void addCharacters(char data[], int start, int end)
{
javaScript += new String(data, start, end - start);
}
public String getJavaScript()
{
return javaScript;
}
}
-end of Init.java---------------------------------------------------------
-PDFInit.java-------------------------------------------------------------
package org.apache.fop.pdf;
/**
* @author pik
*/
public class PDFInit extends PDFObject
{
private String javaScript = "";
private String jsReference;
private int type;
public PDFInit(int number, int type)
{
super(number);
this.type = type;
}
public void setJSReference(String jsReference)
{
this.jsReference = jsReference;
}
public String getJSReference()
{
return jsReference;
}
public void setJavaScript(String javaScript)
{
if (javaScript == null)
this.javaScript = "";
else
this.javaScript = javaScript;
}
public byte[] toPDF()
{
String p;
if (type == 1)
{
p = super.number + " " + super.generation + " obj\n";
p += "<<\n/JavaScript " + (super.number+1) + " " + super.generation +
" R\n>>\nendobj\n";
}
else
if (type == 2)
{
p = super.number + " " + super.generation + " obj\n";
p += "<<\n/Names [ (init)" + (super.number+1) + " " + super.generation
+ " R ]\n>>\nendobj\n";
}
else
{
p = super.number + " " + super.generation + " obj\n";
p += "<<\n/S /JavaScript\n/JS (" + javaScript + ")\n>>\nendobj\n";
}
return p.getBytes();
}
}
-end of PDFInit.java------------------------------------------
Modified classes (code from decompiled classes !):
-ExtensionElementMapping.java---------------------------------
private static synchronized void setupExt()
{
if(foObjs == null)
{
foObjs = new HashMap();
foObjs.put("outline", Outline.maker());
foObjs.put("label", Label.maker());
++ foObjs.put("init", Init.maker());
}
}
-end of ExtensionElementMapping.java--------------------------
-PDFDocument.java---------------------------------------------
++ protected PDFInit pdfInit;
public PDFDocument()
{
position = 0;
location = new Vector();
trailerObjects = new Vector();
objectcount = 0;
objects = new Vector();
outlineRoot = null;
colorspace = new ColorSpace(ColorSpace.DEVICE_RGB);
patternCount = 0;
shadingCount = 0;
xObjectCount = 0;
xObjects = new Vector();
xObjectsMap = new Hashtable();
pendingLinks = null;
pages = makePages();
-- // root = makeRoot(pages);
++ pdfInit = makeInit();
++ root = makeRoot(pages, pdfInit.getJSReference());
resources = makeResources();
info = makeInfo();
}
++ public PDFInit getInit()
++ {
++ return pdfInit;
++ }
++ protected PDFInit makeInit()
++ {
++ PDFInit pdfI = new PDFInit(++objectcount, 1);
++ String reference = pdfI.referencePDF();
++
++ this.objects.add(pdfI);
++ this.objects.add(new PDFInit(++objectcount, 2));
++
++ pdfI = new PDFInit(++objectcount, 3);
++ pdfI.setJSReference(reference); // hold reference to init obj
++ addTrailerObject(pdfI);
++
++ return pdfI;
++ }
+- public PDFRoot makeRoot(PDFPages pdfpages, String reference) //PIK00
(String reference added)
{
+- PDFRoot pdfroot = new PDFRoot(++objectcount, pdfpages, reference);
addTrailerObject(pdfroot);
return pdfroot;
}
-end of PDFDocument.java--------------------------------------
-PDFRoot.java-------------------------------------------------
++ private String reference = null;
++ public PDFRoot(int i, PDFPages pdfpages, String reference) {
++ super(i);
++ this.reference=reference; // hold reference to init obj
++ setRootPages(pdfpages);
++ }
public byte[] toPDF()
throws IllegalStateException
{
StringBuffer stringbuffer = new StringBuffer(super.number + " " +
super.generation + " obj\n<< /Type /Catalog\n/Pages " + rootPages.referencePDF()
+ "\n");
if(_outline != null)
{
stringbuffer.append(" /Outlines " + _outline.referencePDF() + "\n");
stringbuffer.append(" /PageMode /UseOutlines\n");
}
++ if(reference != null)
++ stringbuffer.append("/Names " + reference + "\n");
stringbuffer.append(" >>\nendobj\n");
return stringbuffer.toString().getBytes();
}
-end of PDFRoot.java------------------------------------------
-PDFRenderer.java---------------------------------------------
protected void renderRootExtensions(Vector vector)
{
if(vector != null)
{
for(Enumeration enumeration = vector.elements();
enumeration.hasMoreElements();)
{
ExtensionObj extensionobj = (ExtensionObj)enumeration.nextElement();
if(extensionobj instanceof Outline)
renderOutline((Outline)extensionobj);
++ if(extensionobj instanceof Init)
++ {
++ PDFInit pdfInit = pdfDoc.getInit();
++ pdfInit.setJavaScript(((Init)extensionobj).getJavaScript());
++ }
}
}
}
-end of PDFRenderer.java-----------------------------------------
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