pdf-reverse-pages.bsh

#!/bin/sh
// 2>&1 | :; exec "$(dirname "$0")"/ImageJ.sh "$0" "$@" # exec with fiji

import com.itextpdf.text.Document;

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.SimpleBookmark;

import java.io.FileOutputStream;

import java.util.ArrayList;

if (bsh.args.length != 2) {
	System.err.println("Usage: " + this.interpreter.getSourceFileInfo()
		+ " <input> <output>");
	System.exit(1);
}

copy = null;
all_bookmarks = new ArrayList();
page_offset = 0;

reader = new PdfReader(bsh.args[0]);
reader.consolidateNamedDestinations();
bookmarks = SimpleBookmark.getBookmark(reader);
if (bookmarks != null) {
	if (page_offset != 0)
		SimpleBookmark.shiftPageNumbers(bookmarks, page_offset, null);
	all_bookmarks.add(bookmarks);
}

page_count = reader.getNumberOfPages();
page_offset += page_offset;

document = new Document(reader.getPageSizeWithRotation(1));
output = new FileOutputStream(bsh.args[1]);
copy = new PdfCopy(document, output);
document.open();

print("Reversing " + page_count + " pages");

for (k = page_count; k > 0; k--)
	copy.addPage(copy.getImportedPage(reader, k));

if (reader.getAcroForm() != null)
	copy.copyAcroForm(reader);

if (!all_bookmarks.isEmpty())
	copy.setOutlines(all_bookmarks);

document.close();