I'm inserting pages pages into pdf doc. The pages don't get added at the end or begining they need to be inserted in the middle somewhere (I have a way to determine the insert location with bookmarks).
The key is not to loose bookmarks. So I'm using PdfStamper to insert the pages. The problem is pdfs that are being inserted have form fields and those fields are not coming through.
The code that does inserting
for (int pageNum = 1; pageNum <= readerPdfToAdd.NumberOfPages; pageNum++)
{
PdfImportedPage page = pdfStamper.GetImportedPage(readerPdfToAdd, pageNum);
pdfStamper.InsertPage(filesByCategory[i].PageOfInsert + pageNum, readerPdfToAdd.GetPageSizeWithRotation(pageNum));
var rotation = readerPdfToAdd.GetPageRotation(pageNum);
if (rotation == 90 || rotation == 270)
{
pdfStamper.GetUnderContent(filesByCategory[i].PageOfInsert + pageNum)
.AddTemplate(page, 0, -1f, 1f, 0, 0, readerPdfToAdd.GetPageSizeWithRotation(pageNum).Height);
}
else
{
pdfStamper.GetUnderContent(filesByCategory[i].PageOfInsert + pageNum).AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
I tried something like this to copy the fields but this doesn't copy exactly.
foreach (KeyValuePair<string, AcroFields.Item> kvp in pdfFormFields.Fields)
{
var s = pdfFormFields.GetFieldPositions("Date");
PdfArray r = kvp.Value.GetWidget(0).GetAsArray(PdfName.RECT);
var name = kvp.Value.GetWidget(0).GetAsArray(PdfName.NAME);
Rectangle rr = new Rectangle(r.GetAsNumber(0).FloatValue, r.GetAsNumber(1).FloatValue, r.GetAsNumber(2).FloatValue, r.GetAsNumber(3).FloatValue);
TextField field = new TextField(pdfStamper.Writer, rr, kvp.Value.GetWidget(0).Get(PdfName.T).ToString());
if (kvp.Value.GetWidget(0).Get(PdfName.V) != null)
field.Text = kvp.Value.GetWidget(0).Get(PdfName.V).ToString();
// add the field here, the second param is the page you want it on
pdfStamper.AddAnnotation(field.GetTextField(), filesByCategory[i].PageOfInsert + pageNum);
fields.SetField(kvp.Key, kvp.Value.ToString());
}
Is there a better way to do this? I've tried PdfCopy that looses bookmarks on the source document.
Please use PdfCopy or PdfSmartCopy to assemble documents. As documented in chapter 6 of my book a PdfImportedPage only copies what is in the content stream.
You probably need PdfStamper to stamp some extra content on the original document, and that is fine, but you need to combine this with PdfCopy or PdfSmartCopy to assemble the final document.
Related
I am trying to add a header to existing pdf documents in Java with iText. I can add the header at a fixed place on the document, but all the documents are different page sizes, so it is not always at the top of the page. I have tried getting the page size so that I could calculate the position of the header, but it seems as if the page size is not actually what I want. On some documents, calling reader.getPageSize(i).getTop(20) will place the text in the right place at the top of the page, however, on some different documents it will place it half way down the page. Most of the pages have been scanned be a Xerox copier, if that makes a difference. Here is the code I am using:
PdfReader reader = new PdfReader(readFilePath);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(writeFilePath));
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
PdfContentByte cb = stamper.getOverContent(i);
cb.beginText();
cb.setFontAndSize(bf, 14);
float x = reader.getPageSize(i).getWidth() / 2;
float y = reader.getPageSize(i).getTop(20);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "Copy", x, y, 0);
cb.endText();
}
stamper.close();
PDF that works correctly
PDF that works incorrectly
Take a look at the StampHeader1 example. I adapted your code, introducing ColumnText.showTextAligned() and using a Phrase for the sake of simplicity (maybe you can change that part of your code too):
public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
Phrase header = new Phrase("Copy", new Font(FontFamily.HELVETICA, 14));
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
float x = reader.getPageSize(i).getWidth() / 2;
float y = reader.getPageSize(i).getTop(20);
ColumnText.showTextAligned(
stamper.getOverContent(i), Element.ALIGN_CENTER,
header, x, y, 0);
}
stamper.close();
reader.close();
}
As you have found out, this code assumes that no rotation was defined.
Now take a look at the StampHeader2 example. I'm using your "Wrong" file and I've added one extra line:
stamper.setRotateContents(false);
By telling the stamper not to rotate the content I'm adding, I'm adding the content using the coordinates as if the page isn't rotated. Please take a look at the result: stamped_header2.pdf. We added "Copy" at the top of the page, but as the page is rotated, we see the word appear on the side. The word is rotated because the page is rotated.
Maybe that's what you want, maybe it isn't. If it isn't, please take a look at StampHeader3 in which I calculate x and y differently, based on the rotation of the page:
if (reader.getPageRotation(i) % 180 == 0) {
x = reader.getPageSize(i).getWidth() / 2;
y = reader.getPageSize(i).getTop(20);
}
else {
x = reader.getPageSize(i).getHeight() / 2;
y = reader.getPageSize(i).getRight(20);
}
Now the word "Copy" appears on what is perceived as the "top of the page" (but in reality, it could be the side of the page): stamped_header3.pdf
I have a pdf which comprises of some data, followed by some whitespace. I don't know how large the data is, but I'd like to trim off the whitespace following the data
PdfReader reader = new PdfReader(PDFLOCATION);
Rectangle rect = new Rectangle(700, 2000);
Document document = new Document(rect);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(SAVELCATION));
document.open();
int n = reader.getNumberOfPages();
PdfImportedPage page;
for (int i = 1; i <= n; i++) {
document.newPage();
page = writer.getImportedPage(reader, i);
Image instance = Image.getInstance(page);
document.add(instance);
}
document.close();
Is there a way to clip/trim the whitespace for each page in the new document?
This PDF contains vector graphics.
I'm usung iTextPDF, but can switch to any Java library (mavenized, Apache license preferred)
As no actual solution has been posted, here some pointers from the accompanying itext-questions mailing list thread:
As you want to merely trim pages, this is not a case of PdfWriter + getImportedPage usage but instead of PdfStamper usage. Your main code using a PdfStamper might look like this:
PdfReader reader = new PdfReader(resourceStream);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("target/test-outputs/test-trimmed-stamper.pdf"));
// Go through all pages
int n = reader.getNumberOfPages();
for (int i = 1; i <= n; i++)
{
Rectangle pageSize = reader.getPageSize(i);
Rectangle rect = getOutputPageSize(pageSize, reader, i);
PdfDictionary page = reader.getPageN(i);
page.put(PdfName.CROPBOX, new PdfArray(new float[]{rect.getLeft(), rect.getBottom(), rect.getRight(), rect.getTop()}));
stamper.markUsed(page);
}
stamper.close();
As you see I also added another argument to your getOutputPageSize method to-be. It is the page number. The amount of white space to trim might differ on different pages after all.
If the source document did not contain vector graphics, you could simply use the iText parser package classes. There even already is a TextMarginFinder based on them. In this case the getOutputPageSize method (with the additional page parameter) could look like this:
private Rectangle getOutputPageSize(Rectangle pageSize, PdfReader reader, int page) throws IOException
{
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
TextMarginFinder finder = parser.processContent(page, new TextMarginFinder());
Rectangle result = new Rectangle(finder.getLlx(), finder.getLly(), finder.getUrx(), finder.getUry());
System.out.printf("Text/bitmap boundary: %f,%f to %f, %f\n", finder.getLlx(), finder.getLly(), finder.getUrx(), finder.getUry());
return result;
}
Using this method with your file test.pdf results in:
As you see the code trims according to text (and bitmap image) content on the page.
To find the bounding box respecting vector graphics, too, you essentially have to do the same but you have to extend the parser framework used here to inform its listeners (the TextMarginFinder essentially is a listener to drawing events sent from the parser framework) about vector graphics operations, too. This is non-trivial, especially if you don't know PDF syntax by heart yet.
If your PDFs to trim are not too generic but can be forced to include some text or bitmap graphics in relevant positions, though, you could use the sample code above (probably with minor changes) anyways.
E.g. if your PDFs always start with text on top and end with text at the bottom, you could change getOutputPageSize to create the result rectangle like this:
Rectangle result = new Rectangle(pageSize.getLeft(), finder.getLly(), pageSize.getRight(), finder.getUry());
This only trims top and bottom empty space:
Depending on your input data pool and requirements this might suffice.
Or you can use some other heuristics depending on your knowledge on the input data. If you know something about the positioning of text (e.g. the heading to always be centered and some other text to always start at the left), you can easily extend the TextMarginFinder to take advantage of this knowledge.
Recent (April 2015, iText 5.5.6-SNAPSHOT) improvements
The current development version, 5.5.6-SNAPSHOT, extends the parser package to also include vector graphics parsing. This allows for an extension of iText's original TextMarginFinder class implementing the new ExtRenderListener methods like this:
#Override
public void modifyPath(PathConstructionRenderInfo renderInfo)
{
List<Vector> points = new ArrayList<Vector>();
if (renderInfo.getOperation() == PathConstructionRenderInfo.RECT)
{
float x = renderInfo.getSegmentData().get(0);
float y = renderInfo.getSegmentData().get(1);
float w = renderInfo.getSegmentData().get(2);
float h = renderInfo.getSegmentData().get(3);
points.add(new Vector(x, y, 1));
points.add(new Vector(x+w, y, 1));
points.add(new Vector(x, y+h, 1));
points.add(new Vector(x+w, y+h, 1));
}
else if (renderInfo.getSegmentData() != null)
{
for (int i = 0; i < renderInfo.getSegmentData().size()-1; i+=2)
{
points.add(new Vector(renderInfo.getSegmentData().get(i), renderInfo.getSegmentData().get(i+1), 1));
}
}
for (Vector point: points)
{
point = point.cross(renderInfo.getCtm());
Rectangle2D.Float pointRectangle = new Rectangle2D.Float(point.get(Vector.I1), point.get(Vector.I2), 0, 0);
if (currentPathRectangle == null)
currentPathRectangle = pointRectangle;
else
currentPathRectangle.add(pointRectangle);
}
}
#Override
public Path renderPath(PathPaintingRenderInfo renderInfo)
{
if (renderInfo.getOperation() != PathPaintingRenderInfo.NO_OP)
{
if (textRectangle == null)
textRectangle = currentPathRectangle;
else
textRectangle.add(currentPathRectangle);
}
currentPathRectangle = null;
return null;
}
#Override
public void clipPath(int rule)
{
}
(Full source: MarginFinder.java)
Using this class to trim the white space results in
which is pretty much what one would hope for.
Beware: The implementation above is far from optimal. It is not even correct as it includes all curve control points which is too much. Furthermore it ignores stuff like line width or wedge types. It actually merely is a proof-of-concept.
All test code is in TestTrimPdfPage.java.
I have PDF files that are being created with a composition tool to produce financial statements.
The PDF files are around the 5000 - 10000 pages per file using global image resources to maximise space efficiences.
These statements include marketing images. Many of them (about 3mb worth), not every particular statements uses all the images.
When I extract the PDF file using a tool that has been developed for this purpose (or if I use adobe acrobat just for testing purposes) - to extract a blank page at the start of the PDF file, the resulting extracted PDF is around the 3mb. Auditing the space usage sees that it is comprised of 3mb of images.
Using iTextSharp (latest 5.4.4) I have attempted to iterate through each page and copy to a writer calling reader.RemoveUnusedObjects. But this does not reduce the size.
I also found another example to use a pdfstamper and tried the same thing. Same result.
I've also tried setting maximum compression and SetFullCompression. Neither made any difference.
Can anyone give me any pointers for what I might do. I'm hoping I can do it as a simple exercise and not have to parse the objects in the PDF file and manually remove the unused ones.
Code Below:
iTextSharp.text.pdf.PdfReader reader = new iTextSharp.text.pdf.PdfReader(inputFile);
iTextSharp.text.Document document = new iTextSharp.text.Document(reader.GetPageSizeWithRotation(1));
// step 2: we create a writer that listens to the document
// step 3: we open the document
iTextSharp.text.pdf.PdfCopy pdfCpy = new iTextSharp.text.pdf.PdfCopy(document, new System.IO.FileStream(outputFile, System.IO.FileMode.Create));
document.Open();
iTextSharp.text.pdf.PdfContentByte cb = pdfCpy.DirectContent;
//pdfCpy.NewPage();
int objects = reader.RemoveUnusedObjects();
reader.RemoveFields();
reader.RemoveAnnotations();
// we retrieve the total number of pages
int numberofPages = reader.NumberOfPages;
int i = 0;
while (i < numberofPages)
{
i++;
document.SetPageSize(reader.GetPageSizeWithRotation(i));
document.NewPage();
iTextSharp.text.pdf.PdfImportedPage page = pdfCpy.GetImportedPage(reader, i);
pdfCpy.SetFullCompression();
reader.RemoveUnusedObjects();
reader.RemoveFields();
reader.RemoveAnnotations();
int rotation = reader.GetPageRotation(i);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(i).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
pdfCpy.AddPage(page);
}
pdfCpy.NewPage();
pdfCpy.Add(new iTextSharp.text.Paragraph("This is added text"));
document.Close();
pdfCpy.CompressionLevel = iTextSharp.text.pdf.PdfStream.BEST_COMPRESSION;
pdfCpy.Close();
reader.Close();
Stamper example:
iTextSharp.text.pdf.PdfReader reader = new iTextSharp.text.pdf.PdfReader(inputFile);
using (FileStream fs = new FileStream(outputFile + ".2" , FileMode.Create))
{
iTextSharp.text.pdf.PdfStamper stamper = new iTextSharp.text.pdf.PdfStamper(reader, fs, iTextSharp.text.pdf.PdfWriter.VERSION_1_5);
iTextSharp.text.pdf.PdfWriter writer = stamper.Writer;
writer.SetPdfVersion(iTextSharp.text.pdf.PdfWriter.PDF_VERSION_1_5);
writer.CompressionLevel = iTextSharp.text.pdf.PdfStream.BEST_COMPRESSION;
reader.RemoveFields();
reader.RemoveUnusedObjects();
stamper.Reader.RemoveUnusedObjects();
stamper.SetFullCompression();
stamper.Writer.SetFullCompression();
stamper.Close();
}
reader.Close();
Try using iTextSharp.text.pdf.PdfSmartCopy instead of PdfCopy.
For me it decreased a PDF with a size of ~43MB PDF to ~4MB.
I want to add a PDF file using iTextSharp but if PDF file contains bookmarks then they should also be added.
Currently I'm using following code
Document document = new Document();
//Step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outputFileName, FileMode.Create));
writer.ViewerPreferences = PdfWriter.PageModeUseOutlines;
//Step 3: Open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
//The current file path
string filename = "D:\\rtf\\2.pdf";
// we create a reader for the document
PdfReader reader = new PdfReader(filename);
//Chapter ch = new Chapter("", 1);
for (int pageNumber = 1; pageNumber < reader.NumberOfPages + 1; pageNumber++)
{
document.SetPageSize(reader.GetPageSizeWithRotation(1));
document.NewPage();
// Insert to Destination on the first page
if (pageNumber == 1)
{
Chunk fileRef = new Chunk(" ");
fileRef.SetLocalDestination(filename);
document.Add(fileRef);
}
PdfImportedPage page = writer.GetImportedPage(reader, pageNumber);
int rotation = reader.GetPageRotation(pageNumber);
if (rotation == 90 || rotation == 270)
{
cb.Add(page);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
document.Close();
Please read Chapter 6 of my book. In table 6.1, you'll read:
Can import pages from other PDF documents. The major downside is that all interactive features of the imported page (annotations, bookmarks, fields, and so forth) are lost in the process.
This is exactly what you experience. However, if you look at the other classes listed in that table, you'll discover PdfStamper, PdfCopy, etc... which are classes that do preserve interactive features.
PdfStamper will keep the bookmarks. If you want to use PdfCopy (or PdfSmartCopy), you need to read chapter 7 to find out how to keep them. Chapter 7 isn't available for free, but you can consult the examples here: Java / C#. You need the ConcatenateBookmarks example.
Note that you're code currently looks convoluted because you're not using the correct classes. Using PdfStamper should significantly reduce the number of lines of code.
I'm developing a System in which I have to add some images to an existing PDF Document.
This works great with iText 5.1.3, but for some reason in a PDF that contains a scanned image it won't add any of the images.
Here's the link to the PDF Document that can't be modified with PdfStamper
and here's the code
PdfReader reader = new PdfReader("Registro celular_OR.pdf");
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("DocStamped.pdf"));
Image img = Image.getInstance("someImage.jpg");
img.setAbsolutePosition(0, 0);
img.scaleAbsolute(50f, 50f);
PdfContentByte over = null;
int total = reader.getNumberOfPages() + 1;
for(int i = 1; i < total; i++) {
System.out.println("Procesando Pagina: " + i);
over = stamper.getOverContent(i);
over.addImage(img);
over.beginText();
BaseFont bf_times = BaseFont.createFont(BaseFont.TIMES_ROMAN, "Cp1252", false);
over.setFontAndSize(bf_times, 8);
over.showTextAligned(PdfContentByte.ALIGN_CENTER, "TEXTO PRUEBA", 50, 50, 0);
over.endText();
}
stamper.close();
A PDF page does not need to have its lower left corner at (0, 0). It can be anywhere in the coordinate system. So an A4 page can be (0, 0, 595, 842), but it might as well be (1000, 2000, 1595, 2842).
You are positioning the image at (0, 0):
img.setAbsolutePosition(0, 0);
But the page of this document is defined as (0, 15366, 469, 15728). The image is actually added to the output document, but it's outside the visible area of the page.
You have to get the coordinates of the page to position the image. Inside the loop, do this:
img.setAbsolutePosition(reader.getPageSize(i).getLeft(), reader.getPageSize(i).getBottom());