How can I get the current page number?
Use case: An apllication written using itext5 needs to be rewritten using itext7.
Our app generates PDF files for our customer's monthly bills.
Structure of the pdf:
Create document:
PdfWriter writer = new PdfWriter(new FileOutputStream(filename));
PdfDocument pdfDocument = new PdfDocument(writer);
Document document = new Document(pdfDocument, PageSize.A4);
document.setMargins(82, 35, 0, 38);
buildBody(pdfData, document, writer);
pdfDocument.addEventHandler(PdfDocumentEvent.START_PAGE, new PdfStartPageHandler<>(pdfData, document, this));
pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE, new PdfEndPageHandler(document));
buildBodyContent(pdfData, document, writer);
document.close();
2.Each IEventHandler instance has this format(except the rectangle values):
public void handleEvent(Event event) {
document.add(lineSeparatorHeader);
document.add(paragraphInfo); //
document.add(lineSeparatorHeader);
}
paragraphInfo - is a Paragraph() which consists of one table with two columns
lineSeparatorHeader - is a LineSeparator()
The buildBody(pdfData, document, writer) must fill the body of my pdf page.
My problem is that I don't know how to handle the situation when the content exceeds the size of the rectangle. I would like it to create a new page, generate a new rectangle with the same dimensions and continue writing there.
A. is the header which needs to be on every page
B. is the body whose content is may occupy more than one page. In case it occupies more than one page, the new page must also contain the header and the footer.
C. is the footer
Accumulating your ideas and some suggestions from the comments, the following could be done:
Reserve space for a footer and a header by setting margins on a Document instance, ensuring that no content added to the Document will be placed on them.
Add footer and header events as you've already done.
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(outFileName));
Document doc = new Document(pdfDoc);
int headerHeight = 100;
int footerHeight = 200;
float[] oldMargins = new float[] {doc.getTopMargin(), doc.getRightMargin(), doc.getBottomMargin(),
doc.getLeftMargin()};
doc.setMargins(doc.getTopMargin() + headerHeight, doc.getRightMargin(), doc.getBottomMargin() + footerHeight,
doc.getLeftMargin());
pdfDoc.addEventHandler(PdfDocumentEvent.START_PAGE, new IEventHandler() {
#Override
public void handleEvent(Event event) {
PdfDocumentEvent pdfDocumentEvent = (PdfDocumentEvent) event;
PdfPage page = pdfDocumentEvent.getPage();
Rectangle pageRectangle = page.getPageSize();
Rectangle headerArea = new Rectangle(oldMargins[3], pageRectangle.getTop() - oldMargins[0] - headerHeight,
pageRectangle.getWidth() - oldMargins[1] - oldMargins[3], headerHeight);
new Canvas(page, headerArea).add(
new Div()
.setHeight(headerArea.getHeight())
.setWidth(headerArea.getWidth())
.setBackgroundColor(ColorConstants.RED))
.close();
}
});
pdfDoc.addEventHandler(PdfDocumentEvent.END_PAGE, new IEventHandler(){
#Override
public void handleEvent(Event event) {
PdfDocumentEvent pdfDocumentEvent = (PdfDocumentEvent) event;
PdfPage page = pdfDocumentEvent.getPage();
Rectangle pageRectangle = page.getPageSize();
Rectangle footerArea = new Rectangle(oldMargins[3], pageRectangle.getBottom() + oldMargins[2],
pageRectangle.getWidth() - oldMargins[1] - oldMargins[3], footerHeight);
new Canvas(page, footerArea).add(
new Div()
.setHeight(footerArea.getHeight())
.setWidth(footerArea.getWidth())
.setBackgroundColor(ColorConstants.YELLOW))
.close();
}
});
for (int i = 0; i < 100; i++) {
doc.add(new Paragraph("I'm body's paragraph #" + i));
}
doc.close();
The resultant PDF looks as expected (no content overflows the footers and the headers):
I am using PDFBox to join two PDFs side by side.
I am using the following code:
PDDocument outDoc = new PDDocument();
int maxPages = targetDoc.getNumberOfPages();
if (sourceDoc.getNumberOfPages() > targetDoc.getNumberOfPages()) {
maxPages = sourceDoc.getNumberOfPages();
}
PDPage sourceIndexPage;
PDPage targetIndexPage;
PDRectangle pdf1Frame;
PDRectangle pdf2Frame;
PDRectangle outPdfFrame;
COSDictionary dict;
PDPage outPdfPage;
LayerUtility layerUtility;
PDFormXObject sourceFormPDF;
PDFormXObject targetFormPDF;
AffineTransform afLeft;
AffineTransform afRight;
for (int indexPage = 0; indexPage < maxPages; indexPage++) {
// Create output PDF frame
try {
sourceIndexPage = sourceDoc.getPage(indexPage);
} catch (IndexOutOfBoundsException error) {
sourceDoc.addPage(new PDPage());
sourceIndexPage = targetDoc.getPage(indexPage);
}
try {
targetIndexPage = targetDoc.getPage(indexPage);
} catch (IndexOutOfBoundsException error) {
targetDoc.addPage(new PDPage());
targetIndexPage = targetDoc.getPage(indexPage);
}
sourceIndexPage.setRotation(0);
targetIndexPage.setRotation(0);
pdf1Frame = sourceIndexPage.getCropBox();
pdf2Frame = targetIndexPage.getCropBox();
outPdfFrame = new PDRectangle(pdf1Frame.getWidth() + pdf2Frame.getWidth(),
Math.max(pdf1Frame.getHeight(), pdf2Frame.getHeight()));
// Create output page with calculated frame and add it to the document
dict = new COSDictionary();
dict.setItem(COSName.TYPE, COSName.PAGE);
dict.setItem(COSName.MEDIA_BOX, outPdfFrame);
dict.setItem(COSName.CROP_BOX, outPdfFrame);
dict.setItem(COSName.ART_BOX, outPdfFrame);
outPdfPage = new PDPage(dict);
outDoc.addPage(outPdfPage);
// Source PDF pages has to be imported as form XObjects to be able to insert them at a specific point in the output page
// pageNumber
layerUtility = new LayerUtility(outDoc);
sourceFormPDF = layerUtility.importPageAsForm(sourceDoc, indexPage);
targetFormPDF = layerUtility.importPageAsForm(targetDoc, indexPage);
// Add form objects to output page
afLeft = new AffineTransform();
layerUtility.appendFormAsLayer(outPdfPage, sourceFormPDF, afLeft, "left " + indexPage);
afRight = AffineTransform.getTranslateInstance(pdf1Frame.getWidth(), 0.0);
layerUtility.appendFormAsLayer(outPdfPage, targetFormPDF, afRight, "right" + indexPage);
}
outDoc.save("oudDoc.pdf");
The issue I have is that for some documents, the size of the outDoc is too high. I expected it to be something around dim source document + dim target document, but it is 10x, 20x more in reality.
Looking inside the document's structure, I noticed that I am repeating common resources that in the original PDFs were separated. Is there a way to compress/optimize my code to have less space on disk?
We solved the problem by postprocessing the generated pdf with ghostscript
I'm using the below code to split the huge PDF into two different PDF. The PDF is splitting properly. The first PDF will be generated with first 2 pages of PDF and 2nd PDF will be generated with the rest of the pages of PDF.
The problem is the size, the source PDF is 17 MB. The 2 PDF's that are generated are also of 15MB each. Logically it should be less in size, I searched the forum, they said PDFont has to be used properly. I haven't used PDFont here not sure If Im doing it wrongly
public static void main(String[] args) throws IOException, COSVisitorException {
File input = new File("sourceFile.pdf");
// pdPage and pdPage1 will be used to get first and second page of entire PDF
//pdPageMedRec will get the rest of the pages
PDPage pdPage = null;
PDPage pdPage1 = null;
PDPage pdPageMedRec = null;
PDDocument firstOutputDocument = null;
PDDocument secondOutputDocument = null;
PDDocument inputDocument = PDDocument.loadNonSeq(input, null);
List<PDPage> list = inputDocument.getDocumentCatalog().getAllPages();
// I wanted two documents to be generated from the big PDF
//firstOutputDocument is document 1 and it will be having first 2 pages of the big pdf
//secondOutputDocument is document 2 and it will be having the rest of the pages of the PDF
firstOutputDocument = new PDDocument();
secondOutputDocument = new PDDocument();
// Taking first page and second page
pdPage = list.get(0);
pdPage1 = list.get(1);
// Appending them as one document
firstOutputDocument.importPage(pdPage);
firstOutputDocument.importPage(pdPage1);
// Looping the rest of the pages
for (int page = 3; page <= inputDocument.getNumberOfPages(); ++page) {
pdPageMedRec = (PDPage) inputDocument.getDocumentCatalog().getAllPages().get(page - 1);
// append page to current document
secondOutputDocument.importPage(pdPageMedRec);
}
// Saving first document
File f = new File("document1.pdf");
firstOutputDocument.save(f);
firstOutputDocument.close();
// Saving second document
File g = new File("document2.pdf");
secondOutputDocument.save(g);
secondOutputDocument.close();
inputDocument.close();
}
I run the following code for an HTML file with Tables.
I am able to convert HTML to PDF for first page with margins all sides.
But as I do document.newPage(); and apply document.setPageSize(); its not working. Margins are not present.
PDF is borderless, without any margins.
Pls guide.
Code:
public class Potrait_ParseHtmlObjects {
public static final String HTML = "C:/h.html";
public static final String DEST = "C:/test33.pdf";
public void createPdf(String file) {
// Parse HTML into Element list
try{
XMLWorkerHelper helper = XMLWorkerHelper.getInstance();
// CSS
CSSResolver cssResolver = helper.getDefaultCssResolver(true);
CssFile cssFile = helper.getCSS(new FileInputStream("D:\\Itext_Test\\Test\\src\\test.css"));
cssResolver.addCss(cssFile);
// HTML
HtmlPipelineContext htmlContext = new HtmlPipelineContext(null);
htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());
htmlContext.autoBookmark(false);
//mycode starts
FontFactory.registerDirectories();
//mycode ends
// Pipelines
ElementList elements = new ElementList();
ElementHandlerPipeline end = new ElementHandlerPipeline(elements, null);
HtmlPipeline html = new HtmlPipeline(htmlContext, end);
CssResolverPipeline css = new CssResolverPipeline(cssResolver, html);
// XML Worker
XMLWorker worker = new XMLWorker(css, true);
XMLParser p = new XMLParser(worker);
//mycode starts
p.parse(new FileInputStream(HTML),Charset.forName("UTF-8"));//changed for Charset Encoding
// step 1
Document document = new Document();
// step 2
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
writer.setInitialLeading(12.5f);
// step 3
document.open();
// step 4
Rectangle left = new Rectangle(33,33,550,770);
document.setPageSize(left);
System.out.println("1"+document.getPageSize());
ColumnText column = new ColumnText(writer.getDirectContent());
column.setSimpleColumn(left);
int runDirection = PdfWriter.RUN_DIRECTION_LTR;
column.setRunDirection(runDirection);
int status = ColumnText.START_COLUMN;
for (Element e : elements) {
if (e instanceof PdfPTable) {
PdfPTable table = (PdfPTable) e;
for (PdfPRow row : table.getRows()) {
for (PdfPCell cell : row.getCells()) {
if(cell!=null)
cell.setRunDirection(runDirection);
}
}
}
if (ColumnText.isAllowedElement(e)) {
column.addElement(e);
status = column.go();
while (ColumnText.hasMoreText(status)) {
Rectangle left1 = new Rectangle(50,50,500,700);
document.newPage();
document.setPageSize(left1);
column.setSimpleColumn(left1);
status = column.go();
}
}
}
// step 5
document.close();
}catch(Exception ex)
{ex.printStackTrace();}
}
/**
* Main method
*/
public static void main(String[] args) throws IOException, DocumentException {
File file = new File(DEST);
file.getParentFile().mkdirs();
new Potrait_ParseHtmlObjects().createPdf(DEST);
}
}
You initialize all page parameters when you do document.newPage(), hence changing the page size or margins doesn't make sense after triggering document.newPage(). If you want a different page size (or orientation, or margins), you need to set the values for the page size, orientation and margins before invoking document.newPage() (and before document.open() if you want to change the first page).
For instance: in your case, you should create your document like this:
Document document = new Document(new Rectangle(33,33,550,770));
And you should change the page size like this:
document.setPageSize(left1);
document.newPage();
column.setSimpleColumn(left1);
You don't have any margins because you use the same Rectangle for the page size as for the column. You are creating a PDF of which the coordinate of the lower-left corner is not equal to (0, 0). This isn't illegale, but it's unusual. My guess is that you want to do something like this:
document.setPageSize(new Rectangle(0, 0, 550, 750););
document.newPage();
column.setSimpleColumn(new Rectangle(50,50,500,700));
This will result in a page size of 7.64 by 10.42 inch (550 by 750 pt) and you'll have a margin of 0
69 inches on every side (50 pt).
How do I "flatten" a PDF-form (remove the form-field but keep the text of the field) with PDFBox?
Same question was answered here:
a quick way to do this, is to remove the fields from the acrofrom.
For this you just need to get the document catalog, then the acroform
and then remove all fields from this acroform.
The graphical representation is linked with the annotation and stay in
the document.
So I wrote this code:
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
import org.apache.pdfbox.pdmodel.interactive.form.PDField;
public class PdfBoxTest {
public void test() throws Exception {
PDDocument pdDoc = PDDocument.load(new File("E:\\Form-Test.pdf"));
PDDocumentCatalog pdCatalog = pdDoc.getDocumentCatalog();
PDAcroForm acroForm = pdCatalog.getAcroForm();
if (acroForm == null) {
System.out.println("No form-field --> stop");
return;
}
#SuppressWarnings("unchecked")
List<PDField> fields = acroForm.getFields();
// set the text in the form-field <-- does work
for (PDField field : fields) {
if (field.getFullyQualifiedName().equals("formfield1")) {
field.setValue("Test-String");
}
}
// remove form-field but keep text ???
// acroForm.getFields().clear(); <-- does not work
// acroForm.setFields(null); <-- does not work
// acroForm.setFields(new ArrayList()); <-- does not work
// ???
pdDoc.save("E:\\Form-Test-Result.pdf");
pdDoc.close();
}
}
With PDFBox 2 it's now possible to "flatten" a PDF-form easily by calling the flatten method on a PDAcroForm object. See Javadoc: PDAcroForm.flatten().
Simplified code with an example call of this method:
//Load the document
PDDocument pDDocument = PDDocument.load(new File("E:\\Form-Test.pdf"));
PDAcroForm pDAcroForm = pDDocument.getDocumentCatalog().getAcroForm();
//Fill the document
...
//Flatten the document
pDAcroForm.flatten();
//Save the document
pDDocument.save("E:\\Form-Test-Result.pdf");
pDDocument.close();
Note: dynamic XFA forms cannot be flatten.
For migration from PDFBox 1.* to 2.0, take a look at the official migration guide.
This works for sure - I've ran into this problem, debugged all-night, but finally figured out how to do this :)
This is assuming that you have capability to edit the PDF in some way/have some control over the PDF.
First, edit the forms using Acrobat Pro. Make them hidden and read-only.
Then you need to use two libraries: PDFBox and PDFClown.
PDFBox removes the thing that tells Adobe Reader that it's a form; PDFClown removes the actual field. PDFClown must be done first, then PDFBox (in that order. The other way around doesn't work).
Single field example code:
// PDF Clown code
File file = new File("Some file path");
Document document = file.getDocument();
Form form = file.getDocument.getForm();
Fields fields = form.getFields();
Field field = fields.get("some_field_name");
PageStamper stamper = new PageStamper();
FieldWidgets widgets = field.getWidgets();
Widget widget = widgets.get(0); // Generally is 0.. experiment to figure out
stamper.setPage(widget.getPage());
// Write text using text form field position as pivot.
PrimitiveComposer composer = stamper.getForeground();
Font font = font.get(document, "some_path");
composer.setFont(font, 10);
double xCoordinate = widget.getBox().getX();
double yCoordinate = widget.getBox().getY();
composer.showText("text i want to display", new Point2D.Double(xCoordinate, yCoordinate));
// Actually delete the form field!
field.delete();
stamper.flush();
// Create new buffer to output to...
Buffer buffer = new Buffer();
file.save(buffer, SerializationModeEnum.Standard);
byte[] bytes = buffer.toByteArray();
// PDFBox code
InputStream pdfInput = new ByteArrayInputStream(bytes);
PDDocument pdfDocument = PDDocument.load(pdfInput);
// Tell Adobe we don't have forms anymore.
PDDocumentCatalog pdCatalog = pdfDocument.getDocumentCatalog();
PDAcroForm acroForm = pdCatalog.getAcroForm();
COSDictionary acroFormDict = acroForm.getDictionary();
COSArray cosFields = (COSArray) acroFormDict.getDictionaryObject("Fields");
cosFields.clear();
// Phew. Finally.
pdfDocument.save("Some file path");
Probably some typos here and there, but this should be enough to get the gist :)
After reading about pdf reference guide, I have discovered that you can quite easily set read-only mode for AcroForm fields by adding "Ff" key (Field flags) with value 1.
This is what documentation stands about that:
If set, the user may not change the value of the field.
Any associated widget annotations will not interact
with the user; that is, they will not respond to mouse
clicks or change their appearance in response to
mouse motions. This flag is useful for fields whose
values are computed or imported from a database.
so the code could look like that (using pdfbox lib):
public static void makeAllWidgetsReadOnly(PDDocument pdDoc) throws IOException {
PDDocumentCatalog catalog = pdDoc.getDocumentCatalog();
PDAcroForm form = catalog.getAcroForm();
List<PDField> acroFormFields = form.getFields();
System.out.println(String.format("found %d acroFrom fields", acroFormFields.size()));
for(PDField field: acroFormFields) {
makeAcroFieldReadOnly(field);
}
}
private static void makeAcroFieldReadOnly(PDField field) {
field.getDictionary().setInt("Ff",1);
}
setReadOnly did work for me as shown below -
#SuppressWarnings("unchecked")
List<PDField> fields = acroForm.getFields();
for (PDField field : fields) {
if (field.getFullyQualifiedName().equals("formfield1")) {
field.setReadOnly(true);
}
}
Solution to flattening acroform AND retaining the form field values using pdfBox:
see solution at https://mail-archives.apache.org/mod_mbox/pdfbox-users/201604.mbox/%3C3BC7E352-9447-4458-AAC3-5A9B70B4CCAA#fileaffairs.de%3E
The solution that worked for me with pdfbox 2.0.1:
File myFile = new File("myFile.pdf");
PDDocument pdDoc = PDDocument.load(myFile);
PDDocumentCatalog pdCatalog = pdDoc.getDocumentCatalog();
PDAcroForm pdAcroForm = pdCatalog.getAcroForm();
// set the NeedAppearances flag to false
pdAcroForm.setNeedAppearances(false);
field.setValue("new-value");
pdAcroForm.flatten();
pdDoc.save("myFlattenedFile.pdf");
pdDoc.close();
I didn't need to do the 2 extra steps in the above solution link:
// correct the missing page link for the annotations
// Add the missing resources to the form
I created my pdf form in OpenOffice 4.1.1 and exported to pdf. The 2 items selected in the OpenOffice export dialogue were:
selected "create Pdf Form"
Submit format of "PDF" - I found this gave smaller pdf file size than selecting "FDF" but still operated as a pdf form.
Using PdfBox I populated the form fields and created a flattened pdf file that removed the form fields but retained the form field values.
In order to really "flatten" an acrobat form field there seems to be much more to do than at the first glance.
After examining the PDF standard I managed to achieve real flatening in three steps:
save field value
remove widgets
remove form field
All three steps can be done with pdfbox (I used 1.8.5). Below I will sketch how I did it.
A very helpful tool in order to understand whats going on is the PDF Debugger.
Save the field
This is the most complicated step of the three.
In order to save the field's value you have to save its content to the pdf's content for each of the field's widgets. Easiest way to do so is drawing each widget's appearance to the widget's page.
void saveFieldValue( PDField field ) throws IOException
{
PDDocument document = getDocument( field );
// see PDField.getWidget()
for( PDAnnotationWidget widget : getWidgets( field ) )
{
PDPage parentPage = getPage( widget );
try (PDPageContentStream contentStream = new PDPageContentStream( document, parentPage, true, true ))
{
writeContent( contentStream, widget );
}
}
}
void writeContent( PDPageContentStream contentStream, PDAnnotationWidget widget )
throws IOException
{
PDAppearanceStream appearanceStream = getAppearanceStream( widget );
PDXObject xobject = new PDXObjectForm( appearanceStream.getStream() );
AffineTransform transformation = getPositioningTransformation( widget.getRectangle() );
contentStream.drawXObject( xobject, transformation );
}
The appearance is an XObject stream containing all of the widget's content (value, font, size, rotation, etc.). You simply need to place it at the right position on the page which you can extract from the widget's rectangle.
Remove widgets
As noted above each field may have multiple widgets. A widget takes care of how a form field can be edited, triggers, displaying when not editing and such stuff.
In order to remove one you have to remove it from its page's annotations.
void removeWidget( PDAnnotationWidget widget ) throws IOException
{
PDPage widgetPage = getPage( widget );
List<PDAnnotation> annotations = widgetPage.getAnnotations();
PDAnnotation deleteCandidate = getMatchingCOSObjectable( annotations, widget );
if( deleteCandidate != null && annotations.remove( deleteCandidate ) )
widgetPage.setAnnotations( annotations );
}
Note that the annotations may not contain the exact PDAnnotationWidget since it's a kind of a wrapper. You have to remove the one with matching COSObject.
Remove form field
As final step you remove the form field itself. This is not very different to the other posts above.
void removeFormfield( PDField field ) throws IOException
{
PDAcroForm acroForm = field.getAcroForm();
List<PDField> acroFields = acroForm.getFields();
List<PDField> removeCandidates = getFields( acroFields, field.getPartialName() );
if( removeAll( acroFields, removeCandidates ) )
acroForm.setFields( acroFields );
}
Note that I used a custom removeAll method here since the removeCandidates.removeAll() didn't work as expected for me.
Sorry that I cannot provide all the code here but with the above you should be able to write it yourself.
I don't have enough points to comment but SJohnson's response of setting the field to read only worked perfectly for me. I am using something like this with PDFBox:
private void setFieldValueAndFlatten(PDAcroForm form, String fieldName, String fieldValue) throws IOException {
PDField field = form.getField(fieldName);
if(field != null){
field.setValue(fieldValue);
field.setReadonly(true);
}
}
This will write your field value and then when you open the PDF after saving it will have your value and not be editable.
This is the code I came up with after synthesizing all of the answers I could find on the subject. This handles flattening text boxes, combos, lists, checkboxes, and radios:
public static void flattenPDF (PDDocument doc) throws IOException {
//
// find the fields and their kids (widgets) on the input document
// (each child widget represents an appearance of the field data on the page, there may be multiple appearances)
//
PDDocumentCatalog catalog = doc.getDocumentCatalog();
PDAcroForm form = catalog.getAcroForm();
List<PDField> tmpfields = form.getFields();
PDResources formresources = form.getDefaultResources();
Map formfonts = formresources.getFonts();
PDAnnotation ann;
//
// for each input document page convert the field annotations on the page into
// content stream
//
List<PDPage> pages = catalog.getAllPages();
Iterator<PDPage> pageiterator = pages.iterator();
while (pageiterator.hasNext()) {
//
// get next page from input document
//
PDPage page = pageiterator.next();
//
// add the fonts from the input form to this pages resources
// so the field values will display in the proper font
//
PDResources pageResources = page.getResources();
Map pageFonts = pageResources.getFonts();
pageFonts.putAll(formfonts);
pageResources.setFonts(pageFonts);
//
// Create a content stream for the page for appending
//
PDPageContentStream contentStream = new PDPageContentStream(doc, page, true, true);
//
// Find the appearance widgets for all fields on the input page and insert them into content stream of the page
//
for (PDField tmpfield : tmpfields) {
List widgets = tmpfield.getKids();
if(widgets == null) {
widgets = new ArrayList();
widgets.add(tmpfield.getWidget());
}
Iterator<COSObjectable> widgetiterator = widgets.iterator();
while (widgetiterator.hasNext()) {
COSObjectable next = widgetiterator.next();
if (next instanceof PDField) {
PDField foundfield = (PDField) next;
ann = foundfield.getWidget();
} else {
ann = (PDAnnotation) next;
}
if (ann.getPage().equals(page)) {
COSDictionary dict = ann.getDictionary();
if (dict != null) {
if(tmpfield instanceof PDVariableText || tmpfield instanceof PDPushButton) {
COSDictionary ap = (COSDictionary) dict.getDictionaryObject("AP");
if (ap != null) {
contentStream.appendRawCommands("q\n");
COSArray rectarray = (COSArray) dict.getDictionaryObject("Rect");
if (rectarray != null) {
float[] rect = rectarray.toFloatArray();
String s = " 1 0 0 1 " + Float.toString(rect[0]) + " " + Float.toString(rect[1]) + " cm\n";
contentStream.appendRawCommands(s);
}
COSStream stream = (COSStream) ap.getDictionaryObject("N");
if (stream != null) {
InputStream ioStream = stream.getUnfilteredStream();
ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int amountRead = 0;
while ((amountRead = ioStream.read(buffer, 0, buffer.length)) != -1) {
byteArray.write(buffer, 0, amountRead);
}
contentStream.appendRawCommands(byteArray.toString() + "\n");
}
contentStream.appendRawCommands("Q\n");
}
} else if (tmpfield instanceof PDChoiceButton) {
COSDictionary ap = (COSDictionary) dict.getDictionaryObject("AP");
if(ap != null) {
contentStream.appendRawCommands("q\n");
COSArray rectarray = (COSArray) dict.getDictionaryObject("Rect");
if (rectarray != null) {
float[] rect = rectarray.toFloatArray();
String s = " 1 0 0 1 " + Float.toString(rect[0]) + " " + Float.toString(rect[1]) + " cm\n";
contentStream.appendRawCommands(s);
}
COSName cbValue = (COSName) dict.getDictionaryObject(COSName.AS);
COSDictionary d = (COSDictionary) ap.getDictionaryObject(COSName.D);
if (d != null) {
COSStream stream = (COSStream) d.getDictionaryObject(cbValue);
if(stream != null) {
InputStream ioStream = stream.getUnfilteredStream();
ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int amountRead = 0;
while ((amountRead = ioStream.read(buffer, 0, buffer.length)) != -1) {
byteArray.write(buffer, 0, amountRead);
}
if (!(tmpfield instanceof PDCheckbox)){
contentStream.appendRawCommands(byteArray.toString() + "\n");
}
}
}
COSDictionary n = (COSDictionary) ap.getDictionaryObject(COSName.N);
if (n != null) {
COSStream stream = (COSStream) n.getDictionaryObject(cbValue);
if(stream != null) {
InputStream ioStream = stream.getUnfilteredStream();
ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int amountRead = 0;
while ((amountRead = ioStream.read(buffer, 0, buffer.length)) != -1) {
byteArray.write(buffer, 0, amountRead);
}
contentStream.appendRawCommands(byteArray.toString() + "\n");
}
}
contentStream.appendRawCommands("Q\n");
}
}
}
}
}
}
// delete any field widget annotations and write it all to the page
// leave other annotations on the page
COSArrayList newanns = new COSArrayList();
List anns = page.getAnnotations();
ListIterator annotiterator = anns.listIterator();
while (annotiterator.hasNext()) {
COSObjectable next = (COSObjectable) annotiterator.next();
if (!(next instanceof PDAnnotationWidget)) {
newanns.add(next);
}
}
page.setAnnotations(newanns);
contentStream.close();
}
//
// Delete all fields from the form and their widgets (kids)
//
for (PDField tmpfield : tmpfields) {
List kids = tmpfield.getKids();
if(kids != null) kids.clear();
}
tmpfields.clear();
// Tell Adobe we don't have forms anymore.
PDDocumentCatalog pdCatalog = doc.getDocumentCatalog();
PDAcroForm acroForm = pdCatalog.getAcroForm();
COSDictionary acroFormDict = acroForm.getDictionary();
COSArray cosFields = (COSArray) acroFormDict.getDictionaryObject("Fields");
cosFields.clear();
}
Full class here:
https://gist.github.com/jribble/beddf7620536939f88db
This is the answer of Thomas, from the PDFBox-Mailinglist:
You will need to get the Fields over the COSDictionary. Try this
code...
PDDocument pdDoc = PDDocument.load(new File("E:\\Form-Test.pdf"));
PDDocumentCatalog pdCatalog = pdDoc.getDocumentCatalog();
PDAcroForm acroForm = pdCatalog.getAcroForm();
COSDictionary acroFormDict = acroForm.getDictionary();
COSArray fields = acroFormDict.getDictionaryObject("Fields");
fields.clear();
I thought I'd share our approach that worked with PDFBox 2+.
We've used the PDAcroForm.flatten() method.
The fields needed some preprocessing and most importantly the nested field structure had to be traversed and DV and V checked for values.
Finally what worked was the following:
private static void flattenPDF(String src, String dst) throws IOException {
PDDocument doc = PDDocument.load(new File(src));
PDDocumentCatalog catalog = doc.getDocumentCatalog();
PDAcroForm acroForm = catalog.getAcroForm();
PDResources resources = new PDResources();
acroForm.setDefaultResources(resources);
List<PDField> fields = new ArrayList<>(acroForm.getFields());
processFields(fields, resources);
acroForm.flatten();
doc.save(dst);
doc.close();
}
private static void processFields(List<PDField> fields, PDResources resources) {
fields.stream().forEach(f -> {
f.setReadOnly(true);
COSDictionary cosObject = f.getCOSObject();
String value = cosObject.getString(COSName.DV) == null ?
cosObject.getString(COSName.V) : cosObject.getString(COSName.DV);
System.out.println("Setting " + f.getFullyQualifiedName() + ": " + value);
try {
f.setValue(value);
} catch (IOException e) {
if (e.getMessage().matches("Could not find font: /.*")) {
String fontName = e.getMessage().replaceAll("^[^/]*/", "");
System.out.println("Adding fallback font for: " + fontName);
resources.put(COSName.getPDFName(fontName), PDType1Font.HELVETICA);
try {
f.setValue(value);
} catch (IOException e1) {
e1.printStackTrace();
}
} else {
e.printStackTrace();
}
}
if (f instanceof PDNonTerminalField) {
processFields(((PDNonTerminalField) f).getChildren(), resources);
}
});
}
If the PDF document doesn't actually contain form fields but you still want to flatten other elements like markups, the following works quite well. FYI It was implemented for C#
public static void FlattenPdf(string fileName)
{
PDDocument doc = PDDocument.load(new java.io.File(fileName));
java.util.List annots = doc.getPage(0).getAnnotations();
for (int i = 0; i < annots.size(); ++i)
{
PDAnnotation annot = (PDAnnotation)annots.get(i);
annot.setLocked(true);
annot.setReadOnly(true);
annot.setNoRotate(true);
}
doc.save(fileName);
doc.close();
}
This effectively locks all markups in the document and they will no longer be editable.
pdfbox c# annotations