I want to add an annotation to a PDF page (i.e. something that would show as a pop-up note or appear in the list of notes for the current page).
And in that note, I want to say "See page 93", where clicking on that takes the user to page 93.
Is that possible? It seems like a useful feature, but I haven't been able to find any examples.
And if so, can it be done with Apache PDF Box?
Yes (it is possible) and yes (it can be done with PdfBox). That question has been asked before and answered several times. Read the follwing answer here and the see the full code here.
try ( InputStream resource = getClass().getResourceAsStream("some.pdf")) {
PDDocument document = Loader.loadPDF(resource);
PDPage page = document.getPage(1);
PDAnnotationLink link = new PDAnnotationLink();
PDPageDestination destination = new PDPageFitWidthDestination();
PDActionGoTo action = new PDActionGoTo();
//destination.setPageNumber(2);
destination.setPage(document.getPage(2));
action.setDestination(destination);
link.setAction(action);
link.setPage(page);
link.setRectangle(page.getMediaBox());
page.getAnnotations().add(link);
document.save(new File("RESULT_FOLDER", "output-with-link.pdf"));
}
Other answers are here and here.
Related
There are some posts about this topic but I cannot find any solution for my case, this is the situation:
I click on a link (a next page):
ActionChains(driver).move_to_element(next_el).click().perform()
Then I get the content of the new page(I'm interested on some script sections inside the body)
html = driver.find_element_by_xpath("//*").get_attribute("outerHTML")
But that content is always the same, no matter how long I wait for.
The only way to get the driver with new DOM information is to do a refresh(),
but for this case that is not a valid option.
Thanks and regards.
I am not sure what exactly you are looking for here, but if I am right you want to capture the content of script tag from the page.
If that is the case capture the page source in a string variable
sorce_code = driver.page_source , after you get the sting you can extract the value by any of the available string methods. I hope it helps.
I am using EventHandler to create page header for my pdf. The content of the header are added into a Table before adding to Canvas. As part of 508 compliance, i need to exclude the header content from being read out loud. How do i accomplice this?
public class TEirHeaderEventHandler : IEventHandler
{
public void HandleEvent(Event e)
{
PdfDocumentEvent docEvent = (PdfDocumentEvent)e;
PdfDocument pdf = docEvent.GetDocument();
PdfPage page = docEvent.GetPage();
PdfCanvas headerPdfCanvas = new PdfCanvas(page.NewContentStreamBefore(), page.GetResources(), pdf);
Rectangle headerRect = new Rectangle(60, 725, 495, 96);
Canvas headerCanvas = new Canvas(headerPdfCanvas, pdf, headerRect);
//creating content for header
CreateHeaderContent(headerCanvas);
headerCanvas.Close();
}
private void CreateHeaderContent(Canvas canvas)
{
//Create header content
Table table = new Table(UnitValue.CreatePercentArray(new float[] { 60, 25, 15 } ));
table.SetWidth(UnitValue.CreatePercentValue(100));
Cell cell1 = new Cell().Add(new Paragraph("Establishment Inspection Report").SetBold().SetTextAlignment(TextAlignment.LEFT));
cell1.SetBorder(Border.NO_BORDER);
table.AddCell(cell1);
Cell cell2 = new Cell().Add(new Paragraph("FEI Number:").SetBold().SetTextAlignment(TextAlignment.RIGHT));
cell2.SetBorder(Border.NO_BORDER);
table.AddCell(cell2);
Cell cell3 = new Cell().Add(new Paragraph(_feiNum).SetBold().SetTextAlignment(TextAlignment.RIGHT));
cell3.SetBorder(Border.NO_BORDER);
table.AddCell(cell3);
canvas.Add(table);
}
}
public static void CreatePdf()
{
using (MemoryStream writeStream = new MemoryStream())
using (FileStream inputHtmlStream = File.OpenRead(inputHtmlFile))
{
PdfDocument pdf = new PdfDocument(new PdfWriter(writeStream));
pdf.SetTagged();
iTextDocument document = new iTextDocument(pdf);
TEirHeaderEventHandler teirEvent = new TEirHeaderEventHandler();
pdf.AddEventHandler(PdfDocumentEvent.START_PAGE, teirEvent);
//Convert html to pdf
HtmlConverter.ConvertToDocument(inputHtmlStream, pdf, properties);
document.Close();
byte[] bytes = TEirReorderingPages(writeStream, numOfPages);
File.WriteAllBytes(outputPdfFile, bytes);
}
}
Note that i have set the document to be tagged. but i still get the "Reading Untagged Document" screen when i open the file. However, all of the content are read including the header when i activate the Read Out Loud feature. Any input or suggestion would be appreciated. Thank you in advance for your help.
General
The approach suggested by Alexey Subach is generally correct. You mark the content as artifact to differentiate it from real content.
element.getAccessibilityProperties().setRole(StandardRoles.ARTIFACT);
This marks the content in the content stream and it excludes the element from the structure tree.
Your case
However, your specific case is more nuanced.
For a well tagged PDF document, the proper way to read it out loud is to process the structure tree, which is a data structure that represents the logical reading order of the (semantic) elements of the document, such as paragraphs, tables and lists.
Because of the way you are creating the header content, it is not automatically tagged: a Canvas instance that is created from a PdfCanvas instance has autotagging disabled by default. So the table in the header is not marked in the content stream and it is not included in the structure tree. Marking it explicitly as an artifact, with the approach described above in General, should not make a significant difference because it was not in the structure tree to begin with.
If you enable autotagging by adding headerCanvas.enableAutoTagging(page), you will notice that the table does appear in the structure tree.
If you then add table.getAccessibilityProperties().setRole(StandardRoles.ARTIFACT), the table is excluded from the structure tree again.
Summary: looking at the structure tree, there's no difference between your original code and the approach of General.
Adobe reading order / accessibility settings
From your description, I think you are using Adobe Acrobat or Reader for the read out loud functionality. Under Preferences > Reading > Reading Order Options, you can configure how the content should be processed for the read out loud feature:
From https://helpx.adobe.com/reader/using/accessibility-features.html:
Infer Reading Order From Document (Recommended): Interprets the reading order of untagged documents by using an advanced method of structure inference layout analysis.
Left-To-Right, Top-To-Bottom Reading Order: Delivers the text according to its placement on the page, reading from left to right and then top to bottom. This method is faster than Infer Reading Order From Document. This method analyzes text only; form fields are ignored and tables aren’t recognized as such.
Override The Reading Order In Tagged Documents: Uses the reading order specified in the Reading preferences instead what the tag structure of the document specifies. Use this preference only when you encounter problems in poorly tagged PDFs.
In my tests, the only way I can make Adobe Reader read out loud the header content created with your original code, is when I select Left-To-Right, Top-To-Bottom Reading Order and enable Override The Reading Order In Tagged Documents. In that case, it is basically ignoring the tagging and just processing the content per the location on the page.
With Override The Reading Order In Tagged Documents disabled, the header content is not read, for your original code and with explicit artifacts.
Conclusion
Although it's a good idea to always tag artifacts as such, so they can be properly differentiated from real content, in this case I believe the behaviour you're experiencing is more related to application configuration than to file structure.
Headers and footers are typically pagination artifacts and should be marked as such in the following way:
table.getAccessibilityProperties().setRole(StandardRoles.ARTIFACT);
This will exclude the table from being read. Please note that you can mark any element implementing IAccessibleElement interface as artifact.
Following SO question Java pdfBox: Fill out pdf form, append it to pddocument, and repeat I had trouble appending a cloned page to a new PDF.
Code from this page seemed really interesting, but didn't work for me.
Actually, the answer doesn't work because this is the same PDField you always modify and add to the list. So the next time you call 'getField' with initial name, it won't find it and you get an NPE. I tried with the same pdfbox version used (1.8.12) in the nice github project, but can't understand how he gets this working.
I had the same issue today trying to append a form on pages with different values in it. I was wondering if the solution was not to duplicate field, but can't succeed to do it properly. I always end with a PDF containing same values for each form.
(I provided a link to the template document for Mkl, but now I removed it because it doesn't belong to me)
Edit: Following Mkl's advices, I figured it out what I was missing, but performances are really bad with duplicating every pages. File size isn't satisfying. Maybe there's a way to optimize this, reusing similar parts in the PDF.
Finally I got it working without reloading the template each time. So the resulting file is as I wanted: not too big (4Mb for 164 pages).
I think I did 2 mistakes before: one on page creation, and probably one on field duplication.
So here is the working code, if someone happens to be stuck on the same problem.
Form creation:
PDAcroForm finalForm = new PDAcroForm(finalDoc, new COSDictionary());
finalForm.setDefaultResources(originForm.getDefaultResources())
Page creation:
PDPage clonedPage = templateDocument.getPage(0);
COSDictionary clonedDict = new COSDictionary(clonedPage.getCOSObject());
clonedDict.removeItem(COSName.ANNOTS);
clonedPage = new PDPage(clonedDict);
finalDoc.addPage(clonedPage);
Field duplication: (rename field to become unique and set value)
PDTextField field = (PDTextField) originForm.getField(fieldName);
PDPage page = finalDoc.getPages().get(nPage);
PDTextField clonedField = new PDTextField(finalForm);
List<PDAnnotationWidget> widgetList = new ArrayList<>();
for (PDAnnotationWidget paw : field.getWidgets()) {
PDAnnotationWidget newWidget = new PDAnnotationWidget();
newWidget.getCOSObject().setString(COSName.DA, paw.getCOSObject().getString(COSName.DA));
newWidget.setRectangle(paw.getRectangle());
widgetList.add(newWidget);
}
clonedField.setQ(field.getQ()); // To get text centered
clonedField.setWidgets(widgetList);
clonedField.setValue(value);
clonedField.setPartialName(fieldName + cnt++);
fields.add(clonedField);
page.getAnnotations().addAll(clonedField.getWidgets());
And at the end of the process:
finalDoc.getDocumentCatalog().setAcroForm(finalForm);
finalForm.setFields(fields);
finalForm.flatten();
How to use PDDestination class in PDFbox ?
whether getPagenumber() method will return the current page number
can any one share u r views
Thanks
The usage of PDDestination or PDAction is very similar to the one of PdfDestination or PdfAction of iText.
So you may want to search iText examples firstly.
Specifically on PDFBox,
e.g.
the following makes the first open page to page 5.
PDDestination dest = new PDPageDestination();
// When you open this PDF, you will see page 5.
dest.setPageNumber(4)
PDActionGoTo action = new PDActionGoTo();
action.setDestination(dest);
document.getDocumentCatalog().setOpenAction(action);
I'm using Tika* to parse a PDF file.
There are no problems to retrieve the document's text, but I don't figure out how to extract text:
underlined
highlighted
crossed out
Adobe Writer gives you different text edit options, but I'm not able to see where they are "hidden".
Is there a solution to extract these metadata information? (underline, highligh ...)
Do you know if Tika is able to extract this data?
*http://tika.apache.org/
Wow. 4 years is a long time to wait for an answer, and I figure you have found a solution by now. Anyways, for the sake of those who would visit this link, the answer is Yes. Apache Tika can extract not just text in a document, but also the formatting as well (e.g. bold, italicized). This was my Scenario:
//inputStream is the document you wish to parse from.
AutoDetectParser parser = new AutoDetectParser();
ContentHandler handler = new BodyContentHandler(new ToXMLContentHandler());
Metadata metadata = new Metadata();
parser.parse(inputStream,handler,metadata);
System.out.println(handler.toString());
The print statement prints an XML of your document. With a little work of cleaning up the XML (really HTML tags), you would be left with tags like < b >text< /b> for bold text and < i >text < / i > for italicized text. Then you could find a way to render it. Good luck.