how to add a paragraph to each page using itextwithout using ColumnText.showTextAligned because the text added to each page is different and can span multiple lines.
is it possible to add text using PdfStamper ? Or should i use PdfWriter . i prefer using PdfStamper to get this done because PdfStamper was already used to add annotations and this functionality can be integrated easily.
You can add paragraphs straight into the document object
(http://tutorials.jenkov.com/java-itext/paragraph.html)
Or I have personally used a PdfTable with 100% width. It easily lines up all the paragraph objects (http://itextpdf.com/examples/iia.php?id=76)
Both of those methods support either formatted text or a plain string which will instead use defaults.
You can do it with a stamper, but it requires the ColumnText.showTextAligned method.
Related
I want to populate interactive pdf form with the xml using itext:
//build the xmlString, convert it to InputStream
AcroFields fields = pdfStamper.getAcrofields();
XfaForm form = fields.getXfa();
form.fillXfaForm(xmlStream);
The fields getting populated, however the resulting *.pdf is now not editable in the Adobe Reader. That is the document property has "Filling of form fields: Now Allowed" now. So, I was digging around for a solution and read somewhere (I believe the itext in action book), that the itext does, indeed, break the usage rights. After, I tried the solutions described here:
http://itextpdf.com/examples/iia.php?id=166
That is, remove usage rights completely or create stamper in the append mode, e.g.,
reader.removeUsageRights();
or
PdfStamper stamper = PdfStamper(reader, new FileOutputStream(dest), '\0', true)
The pdf is now editable. However, the PDF form I am populating has a drop-down menu - if a particular option in that drop-down is selected, the pdf form activates one of its own text field. This does not work anymore - the drop-down is selected, but the text field it supposed to activate remains inactivate and blank.
I've read that the usage rights are part of the pdf own encryption, I was wondering if it is possible to get that encryption and set it into into a populated copy of the pdf form?
Thank you
I am trying to set a list of images in a PDF document using iText with Java, i could just insert some of them in the first page but i don't know how to jump to the next pages in order to put the rest of my pictures
for(int i = 0; i < 25; i++) {
Image myImg = Image.getInstance("/home/code/img"+i+".png");
imgPaper.setAbsolutePosition(50, 728-(y*58));
document.add(myImg);
y++;
}
The OP clarified his question in a comment
i have already another pages, i just want how to jump to them
You seem to be creating a new document using a PdfWriter. That class is designed to create a pdf one page after the other. As soon as you start a new page, all former ones are written to file.
Thus, in this process you cannot jump to arbitrary pages. You have to add all information for a page while it is the current one.
If, after creating a multi page document, you need to manipulate the content of its pages, first close the document (finishing it), read it into a PdfReader, and apply a PdfStamper which allows you to manipulate arbitrary pages of an existing PDF.
Alternatively, especially if your images constitute something like a water mark or header/footer Logos, consider using page events in your pdf creation process with the PdfWriter.
try to add a new line to your document
document.add( Chunk.NEWLINE );
link for info:
How to insert blank lines in PDF?
I have a problem with iText and flatten form fields in pdfs.
I submit a pdf with form fields created in Acrobat to my java method. On a website i have created a form to fill the form fields in the pdf. The form fields are filled correctly, but as soon as i flatten the document the text is moved to a little different position. The biggest difference is seen in multiline form fields. There the text is at the border of the field in the upper left. In Acrobat and before flattening the text has a padding to the top.
Here is my java code to call the methods of iText:
PdfReader template = new PdfReader(templ);
XfdfReader xfdfReader = new XfdfReader(xfdf);
OutputStream outputStream = new FileOutputStream(output);
PdfStamper stamper = new PdfStamper(template, outputStream, '\0');
AcroFields form = stamper.getAcroFields();
Set<String> fields = form.getFields().keySet();
form.setFields(xfdfReader);
stamper.setFreeTextFlattening(true);
stamper.setFormFlattening(true);
stamper.close();
template.close();
Anyone has an idea why the text is moving when i flatten the pdf? How can I avoid this?
I allready tried different versions from iText. From version 4.X to 5.X. The difference appears in all versions.
Although i tried to move the form fields in the code of iText, but then the whole field is moving and the difference of the position is much bigger and not predictable.
In my project the text must be at the exact same position as in Acrobat, so i must find a workaround for this misbehavior. I hope somebody can help me.
Thanks for your help in advance.
The position of the baseline of a field in a PDF file has been changed over the years. You'll even see differences depending on the version of Acrobat you are using.
There is no solution for your problem unless you know the exact offset. If you do, you can use the setExtraMargin() method to change the offset of all fields when flattening the document.
We created this method to deal with specific forms that have a baseline that is different from what is to be expected. Which values you choose can be different for different forms.
I was going through the itext api docs & I was able create a pdf with a watermark image or text but did not find a method to get/extract watermark content from pdf.
So I have a pdf document containing watermarked text/image & I want to extract that text or img and validate which I am not able to do.
How to extract watermark content using iText apis? Or is there any other way to validate watermark content?
By validate I mean if I have an existing pdf/image with some watermarked text [as done in 2nd link in above ref], I want to check whether it has expected text/image.
References:
http://itextpdf.com/themes/keyword.php?id=226
http://www.java-connect.com/itext/add-watermark-in-PDF-document-using-java-iText-library.html
How to extract watermark content using iText apis? Or is there any other way to validate watermark content?
Extracting watermark content?
There is nothing special about watermarks in PDFs in contrast to regular page content. They merely
appear pretty early in the content stream and other content later in the stream, therefore, is drawn above it; or they
appear pretty late in the content stream but have some kind of transparency applied.
Actually there is another type of watermarks which is special, the so-called Watermark Annotations. As these annotation can easily be lost when documents are merged or otherwise manipulated, though, they hardly ever are used.
Furthermore different PDF generating software suites offering a way to add watermarks do so in their respective individual way. Thus, you cannot even recognize watermarks by some special operations done in some specific unique pattern.
Already the iText examples you referred to apply different kinds of watermarks
MovieCountries2 simply draws some gray large Text using an angled base line.
StampStationery copies a complete page from some PDF (which itself may visually have foreground and background material) into a separate object inside the target PDF and adds a reference to this object at the beginning of every page of the target.
InsertPages similarly references a page from some PDF on every newly generated target document page.
Thus, blind watermark extraction is virtually impossible.
Validating watermark content!
You might try some validation, though, if you know what you are searching for. You simply do not merely search some (in PDF not existing) fixed watermark stream but instead the whole page content.
iText offers the classes of the parser package which allow extraction of text and/or bitmap images from content streams. Look at the samples referenced from the keywords PARSING PDF > EXTRACTING IMAGES and PARSING PDF > EXTRACTING TEXT.
You merely have to check whether the image or text which you expect can be found by these classes positioned and styled as you expect.
I have a requirement to insert Content into the middle of the page in a PDF.
The Content may be a Dynamic Table or an Image.
My Concept was to first split the PDF into 2 parts, then get the new Content that is to be added and append by replacing a place holder field.
the Splitting is called Tiling as per IText and here is an example for the same.
http://itextpdf.com/examples/iia.php?id=116
The Code above has 2 drawbacks:
1. It splits the page into 16 parts. but that is part of the example. Still i cant figure out a way to split the file into 2 parts only.
2. secondly the split page is converted to a complete page thus disturbing its proportions.
The Rearranging code is the another problem.
The remaining Content should be re-ordered in append mode. but till yet i have only found codes to add complete new pages rather than just the content.
I have found a code that appends the PDF content by replacing a placeholder:
float[] fieldPosition= pdfTemplate.getAcroFields().getFieldPositions("tableField");
PdfPTable table = buildTable();
PdfContentByte cb = stamper.getOverContent(1);
table.writeSelectedRows(0, -1, fieldPosition[1],fieldPosition[4],cb);
Please help me to solve this requirement.
PDF is a presentation format, not an edition format. In other words, it is not designed to allow content insertion, with the original content reflowing gracefully. As a consequence, no tool (at least, none that I know of, and surely not iText) will enable you to achieve what you were given as a requirement.
My advice :
refuse the assignment since it's not feasible, or
get your hands on the original document, insert the desired extra content, and then convert to PDF.