JPEDAL: Put a Listener on internal references (page/chapiter links) for a PDF document

Hi,

how can I attach a listener to existing links on a certain page, which refer to another page?

What I can already do, is getting the Subtype of the extracted annotation Object and check if i've got an URL:

How to perform the same as in PART 2, but for internal references?

To exchange PdfDictionary.URI by PdfDictionary.Outlines didn't work.

Hi,

I got stuck at the same problem like you.

Did you manage to solve the problem?

Thanks.

Luckily, I have found a solution for the problem. See my detailed explanation here: http://blog.codejava.net/nam/parsing-link-annotation-in-pdf-document/
Hope this will help others who are facing the same problem.

I solved the problem by overwriting the DefaultActionHandler by the same mehtod, but specifying the ActionFactory. In this way you can tell exactly what should happen when an annotation has been clicked:

@Override
        public void A(Object raw, FormObject formObj, int eventType) 
        {

// new version
            PdfObject aData = null;
            if(eventType==MOUSERELEASED )
            {
                //get the A action if we have activated the form (released)
                aData = formObj.getDictionary(PdfDictionary.A);
            }

if(aData==null)
            {
                aData = formObj.getDictionary(PdfDictionary.AA);
                if(aData!=null)
                {
                    if(eventType == MOUSEENTERED)
                    {
                        aData = aData.getDictionary(PdfDictionary.E);
                    }
                    else 
                        if(eventType == MOUSEEXITED)
                        {
                            aData = aData.getDictionary(PdfDictionary.X);
                        }
                        else 
                            if(eventType == MOUSEPRESSED)
                            {
                                aData = aData.getDictionary(PdfDictionary.D);
                            }
                            else 
                                if(eventType == MOUSERELEASED)
                                {
                                    aData = aData.getDictionary(PdfDictionary.U);
                                }
                }
            }

//change cursor for each event
            actionFactory.setCursor(eventType);
            
            //Follow internal link
            gotoDest(formObj,eventType,PdfDictionary.Dest);

int subtype=formObj.getParameterConstant(PdfDictionary.Subtype);

int popupFlag = formObj.getActionFlag();

if (eventType==MOUSECLICKED && (popupFlag == FormObject.POPUP || subtype==PdfDictionary.Text))
                {
                    actionFactory.popup(raw,formObj,currentPdfFile);
                } 
                else 
                {
                    // can get empty values
                    if (aData == null)
                    return;

int command = aData.getNameAsConstant(PdfDictionary.S);

// S is Name of action
                    if (command != PdfDictionary.Unknown) 
                    {
                        if (command != PdfDictionary.Named) 
                        {
                            if(command==PdfDictionary.Goto || command==PdfDictionary.GoToR)
                            {
                               gotoDest(aData, eventType,command);
                            } 
                            else 
                                if (command != PdfDictionary.ResetForm) 
                                {
                                    if (command != PdfDictionary.SubmitForm) 
                                    {
                                        if (command != PdfDictionary.JavaScript) 
                                        {
                                            if (command == PdfDictionary.Hide) 
                                            {
                                                FieldsHideObject fieldsToHide = new FieldsHideObject();

getHideMap(aData, fieldsToHide);

actionFactory.setFieldVisibility(fieldsToHide);

} 
                                            else 
                                                if (command == PdfDictionary.URI) 
                                                {
                                                    try 
                                                    {
                                                        BrowserLauncher.openURL(aData.getTextStreamValue(PdfDictionary.URI));
                                                    } 
                                                    catch (IOException e1) 
                                                    {
                                                        //TOTRANSLATE
                                                        DpsLogger.SWINGUI_PDF.warning(e1, "URL Not Found", e1);
                                                        actionFactory.showMessageDialog(Messages.getMessage("PdfViewer.ErrorWebsite"));
                                                    }
                                                } 
                                                else 
                                                    if (command == PdfDictionary.Launch) 
                                                    {
                                                            //get the F dictionary
                                                            PdfObject dict=aData.getDictionary(PdfDictionary.F);

//then get the submit URL to use
                                                            if(dict!=null)
                                                            {
                                                                String target = dict.getTextStreamValue(PdfDictionary.F);

InputStream sourceFile = getClass().getResourceAsStream("/org/jpedal/res/"+target);

if(sourceFile==null)
                                                                {
                                                                    //TOTRANSLATE
                                                                    JOptionPane.showMessageDialog(decodePdf,"Unable to locate "+target);
                                                                }
                                                                else
                                                                {
                                                                    //get name without path
                                                                    int ptr=target.lastIndexOf("/");
                                                                    if(ptr!=-1)
                                                                    target=target.substring(ptr+1);

File output=new File(ObjectStore.temp_dir+target);
                                                                    output.deleteOnExit();
                                                                    try 
                                                                    {
                                                                        ObjectStore.copy(new BufferedInputStream(sourceFile),
                                                                        new BufferedOutputStream(new FileOutputStream(output)));
                                                                    }
                                                                    catch (FileNotFoundException ex) 
                                                                    {
                                                                        //TOTRANSLATE
                                                                        DpsLogger.SWINGUI_PDF.warning(ex, "File Not Found", ex);
                                                                        JOptionPane.showMessageDialog(decodePdf,"Unable to locate "+target);
                                                                    }
                                                                }
                                                            }
                                                    } 
                                                    // else 
                                                        // if (command == PdfDictionary.SetOCGState) 
                                                        // {
//                        				// 	additionalAction_OCState(eventType, aData);
                                                        // }
                                        }
                                        
                                    }
                                    // else additionalAction_SubmitForm(aData);
                                    
                                }
                                // else additionalAction_ResetForm();
                            
                        }
                        // else additionalAction_Named(eventType, aData);
                    }
                }
	}