Goals:
(1) To obtain a "copy" of an existing PDF (including interactive features)
(2) The "copy" must be on a slightly larger page, to accommodate goal 3.
(3) Place text in the "border" created from placing the original page on the
slightly larger page.
Background:
(1) I have read and re-read iText in Action several/many times (both editions)
and simply confuse myself more and more each time I read it. However, I think
I am beginning to have a better understanding.
(2) I have actually written code that does all of the above with the slight
exception that interactive features are lost.
(3) Using iText 5.0.2
Question:
Am I using the best approach as detailed in my current algorithm that follows?
It would seem that I should probably be using PdfStamper somehow (even though I
think that will result in a different approach to increasing the page size.
However, unless I have mis-read this many times now, I thought the whole idea to
writer.getImportedPage()
was to retain interactive features by letting the writer use the reader?
Or is that only when using PdfCopy/SmartCopy?
Current Algorithm:
Goal #3 is another step (not included here) and seems to working just fine
(though the answer to my question may affect this).
Goals #1 and #2 are combined into a single method which is where I am losing
interactive features:
private File enlargeDocument(String src, int stampType, boolean
docDelState) throws IOException, DocumentException {
final PdfReader rdr = createPdfReader(src);
int count = rdr.getNumberOfPages();
final File tmpDstFile = createTempPDFFile();
final Document document = new Document();
final PdfWriter writer = PdfWriter.getInstance(document, new
FileOutputStream(tmpDstFile));
document.open();
final PdfContentByte cb = writer.getDirectContent();
for ( int i = 1 ; i <= count ; i++ ) {
final float cropSize = calcStampCropSize(rdr, i, stampType);
final PdfImportedPage page = writer.getImportedPage(rdr, i);
final int rotation = rdr.getPageRotation(i);
logger.debug("Rotation of page " + i + " is: " + rotation);
final float width = page.getBoundingBox().getRight() + ((stampType
== PRESTAMP) ? 0 : cropSize);
final float height = page.getBoundingBox().getTop() + ((stampType
== PRESTAMP) ? cropSize : 0);
final PdfRectangle newRect = new PdfRectangle(width, height,
rotation);
document.setPageSize(newRect.getRectangle());
document.newPage();
if (stampType == PRESTAMP) {
cb.addTemplate(page, 0, cropSize);
} else { // stampType == POSTSTAMP
cb.addTemplate(page, cropSize, 0);
}
}
document.close();
return tmpDstFile;
}
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